CN104479746A - Energy-saving process and device for preparing clean fuel gas from coal - Google Patents
Energy-saving process and device for preparing clean fuel gas from coal Download PDFInfo
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- CN104479746A CN104479746A CN201410767796.3A CN201410767796A CN104479746A CN 104479746 A CN104479746 A CN 104479746A CN 201410767796 A CN201410767796 A CN 201410767796A CN 104479746 A CN104479746 A CN 104479746A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/30—Fuel charging devices
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/34—Grates; Mechanical ash-removing devices
- C10J3/40—Movable grates
- C10J3/42—Rotary grates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/64—Processes with decomposition of the distillation products
- C10J3/66—Processes with decomposition of the distillation products by introducing them into the gasification zone
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/86—Other features combined with waste-heat boilers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2200/00—Details of gasification apparatus
- C10J2200/15—Details of feeding means
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
- C10J2300/1615—Stripping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses an energy-saving process for preparing clean fuel gas from coal. The energy-saving process comprises the following steps: gasifying crushed coal, pumping out crude coal gas with a volume ratio of 5-60% when gasified crushed coal passes through a crude coal gas lead-out device (3) at the middle part of a gasification chamber, and feeding the crude coal gas treated by a washing and cooling tower I (5) into a waste heat boiler I (8) for recycling waste heat; and leading out the rest crude coal gas with the volume ratio of 40-95% by virtue of a coal gas channel III on a double-channel static coal distributor (2), passing through a washing and cooling tower II (6), then performing waste heat recovery in the waste heat boiler I (8), finally cooling the crude coal gas, feeding the crude coal gas (18) with concentrated liquid separated by a gas-liquid separator (11) to a downstream working procedure, and feeding washed concentrated liquid to a coal gas and water separation device (15) for recycling. The energy-saving process disclosed by the invention has the advantages of energy conservation, low running cost, less coal dust bring-out amount and less tar-containing coal gas and water.
Description
Technical field
The invention belongs to coal clean gas field, be specifically related to a kind of technique and device of energy-saving coal clean gas.
Background technology
Crushed coal pressurized-gasification furnace is a kind of fixed bed coal gasifier, and owing to requiring low to feed coal, namely except heavy caking coal, all the other coals can gasify, particularly the low grade coal of low-rank coal and high ash melting point.This vapourizing furnace is widely applied to coal synthesis ammonia, methyl alcohol, dme, synthetic oil and coal gas Sweet natural gas field.Along with current Coal Gasification Technology is towards major diameter, the future development of high pressure, in unit time, the treatment capacity of coal progressively increases, coal lock is as the coal filling hole of crushed coal pressure gasifying, need ceaselessly to carry out punching press pressure release, the growth requirement of extensive gasification can not be met, the gasification ability that high pressure makes in addition improves, produce coal gas amount to increase, add the poor heat stability etc. of low-rank coal, single gas exit must take a large amount of coal dusts out of, follow-up gas washing is caused to cool, the workshop sections such as waste heat recovery result in blockage or the problem of separation difficulty, in washing process, use excessive water to wash simultaneously, gas liquor generation is caused to increase, higher-grade heat drop is low.
China Patent No. is the single coal lock that patent discloses employing of 200580041975.8, the fixed bed coal gasifier that static distribution device has Single gas to export, this vapourizing furnace is the crushed coal pressurized-gasification furnace generally used at present, outstanding problem is that rough coal band of gas dirt problem is serious, by-product low-pressure steam is many, and dust-laden is containing problems such as pitch coal air water content are many.
Chinese patent: the employing that patent discloses of 201320037548.4 is single coal locks, and do not have static distribution device, Single gas passage, exists the problems referred to above equally.
Chinese patent: 201220582157.6 patent discloses a kind of two passage cloth device for coal for coal gasifier, by coal entrance, gas exit, inner core, the compositions such as raw gas passage composition.The object of this patent reduces coal gas enrichment area, reduces gas speed, reduce coal dust drag-out, have certain effect, but action effect is limited.
Chinese patent: 201320118045.X and 201220583000.5 discloses the rotatable fire grate of a kind of rotation with gas distributing cylinder, the former is used for the crushed coal pressurized-gasification furnace of vapourizing furnace diameter below 4.0 meters, the latter is used for the crushed coal pressurized-gasification furnace of 4.5 meters to 5.0 meters, the fire grate of these two kinds of sizes can significantly improve the stability of gasification, but also can't resolve above-mentioned Problems existing.
Summary of the invention
In order to overcome deficiency of the prior art, an object of the present invention is to provide a kind of technique of energy-saving coal clean gas.
It is low that another object of the present invention is to provide a kind of coal lock punching press gas consumption, and running cost is low, coal dust drag-out is few, containing the vapourizing furnace that pitch coal air water is few.
The technique of a kind of energy-saving coal clean gas provided by the invention comprises the steps:
(1) broken coal of 5-50mm is entered vaporizer top through being communicated with double coal lock feeding unit, after being uniformly distributed by the static coal distributing device of two channels, relying on action of gravity slowly to decline and to burn each bed through super-dry, destructive distillation, methanation, gasification and carbon residue from top to bottom.Vaporized chemical enters bottom vaporizer through gasification agent inlet, by rotation furnace grill, under the booster action of hot lime-ash, is uniformly distributed in zone of combustion bed.In the process, ash is cooled to 300-400 DEG C, discharges vaporizer by lime-ash discharge outlet; Vaporized chemical after preheating is upwards by zone of combustion, and in zone of combustion, oxygen and remaining coal char combustion major part generate CO
2zone of combustion is the region that gasifier temperature is the highest, for other reactions on top provide heat, along with hot gas rises through gasification layer along vaporizer, generate most of synthetic gas, continue to rise to methanation layer, generating portion methane gas again, methane gas and synthetic gas extract 5-60% out when methanation layer is by drawing raw gas device in the middle part of vaporizer, the raw gas of temperature 450-700 DEG C, through cyclonic separator I dedusting, the raw gas temperature after the raw gas making dust content be less than 1mg/L enters waste heat boiler I recovery waste heat drops to 200-260 DEG C;
(2) raw gas of methanation layer residue 40-95% heats the coal sample declined through destructive distillation layer, coal sample pyrolysis output is made to contain gas, the rich hydrogen volatile matter of steam and tar, along with gas rises further, further cooling is able on vapourizing furnace top from the volatile matter of dry distillation area and synthetic gas, coal is then able to preheating and drying, the raw gas of temperature between 210-300 DEG C is drawn eventually through the raw gas passage on the static coal distributing device of vaporizer top two channels, after scrubber cooler I, temperature is down to 200-210 DEG C, then the raw gas dropping to 200-260 DEG C with temperature after waste heat boiler I recovery waste heat mixes, enter waste heat boiler II recovery waste heat, the temperature of raw gas is made to be down to 170-190 DEG C, go out the raw gas after phlegma through gas-liquid separator separates and deliver to lower procedure, gas liquor tripping device gas recovery water sent to by washing phlegma,
(3) gas liquor of the dust-laden washed from scrubber cooler I enters bottom initial gross separation dirt and the water of waste heat boiler II with coal gas, the gas liquor of major part not dust-laden is pressurizeed by coal gas washing cycling water pump and turns back to scrubber cooler I after supplementing Coal-gas Washing Water Using mixing and recycles, the gas liquor gas delivery water separation device of all the other dust-ladens reclaims, after gas liquor tripping device isolates dirt and oil, the gas liquor pressurization that separation obtains turns back to scrubber cooler I and recycles;
(4) plant area is sent from the isolated dust of cyclonic separator II.
(5) oiler feed needed for waste heat boiler II is through and sends into waste heat boiler II after oiler feed water pump is pressurized to 4.0MPa-6.0MPa and produce the low-pressure steam that temperature is 161-181 DEG C, a part feeds water as waste heat boiler I, produce mesohigh steam, another part is as low-pressure steam product.
In order to realize object of the present invention, invent broken coal to add and press dry ash discharge vapourizing furnace, it comprises and is communicated with double coal lock feeding unit and body of heater, have on body of heater and be communicated with double coal lock feeding unit, upper of furnace body has the static coal distributing device of two channels, have in the middle part of body of heater in the middle part of vaporizer and draw raw gas device, lower portion of furnace body has rotation furnace grill, gasification agent inlet and lime-ash discharge outlet is had at bottom of furnace body, gasification agent inlet is between rotation furnace grill and lime-ash discharge outlet, and gasification agent inlet is connected with the gas distributing cylinder in rotation furnace grill.
One, described connection double coal lock feeding unit, it comprises coal lock, coal locks valve, the lower valve of coal lock, coal inlet, transitional storehouse and coal outlet, coal lock has 2, and each coal lock top is coal inlet, that coal locks valve below coal inlet, coal lock bottom communicates with pipe connecting top, and valve under coal lock is equipped with at pipe connecting top, is connected with transitional storehouse bottom pipe connecting, the bottom of transitional storehouse is coal outlet, is connected between 2 coal locks by least 1 coal lock gas passage.
Described coal lock gas passage locks gas passage expanding reach by two ends coal and middle coal lock gas passage straight section forms, at coal lock gas passage straight section built with connection coal lock access valve, be positioned at coal lock gas passage expanding reach and coal and lock baffle plate wall Link Port being provided with aperture, it is 30-60 ° that coal locks the angle α that gas passage expanding reach wall and coal lock wall.
Described baffle plate percentage of open area is between 45-65%, and the aperture of aperture is 0.2-1.0 millimeter.
The position of described coal lock gas passage between 0.45-0.55 times of whole coal lock height.
Connection double coal lock feeding unit as above, make coal lock gas and recycle, the rate of recycling reaches more than 60%.
Two, the static coal distributing device of described two channels is by two channels static coal distributing device coal sample entrance, inner core, coal sample enters the 1st passage of vaporizer, and coal sample enters the 2nd passage and the raw gas passage composition of vaporizer, and concrete structure is shown in Chinese patent 201220582157.6.
The static coal distributing device of two channels as above also can adopt symmetrical two gas flues, 50% is increased than single gas flue area, add in the middle part of vaporizer and add the coal gas that symmetrical gas flue draws 30-60%, reduce 65-80% compared with the flow velocity exported with raw gas in prior art, significantly reduce the carrying amount of dust in coal gas.
Three, it comprises vapourizing furnace outer wall to draw raw gas device in the middle part of described vaporizer, gasification stove internal wall (and gas flue, vapourizing furnace outer wall and gasification stove internal wall have the gas flue of at least 2, gas flue is uniformly distributed in vapourizing furnace outer wall same level, the opening upwards of gas flue, gas flue is made up of gas flue outer wall and gas flue inwall, gas flue outer wall is connected with vapourizing furnace outer wall, and become the angle β of 30-45 degree, gas flue inwall is connected with gasification stove internal wall, the baffle plate of aperture is provided with in the junction, upper middle part of gas flue inwall and gasification stove internal wall, baffle plate is parallel with gasification stove internal wall.
Described gas flue is metering from bottom vaporizer in the position of gasification stove internal wall, is 0.41-0.62 times of vaporizer height.
The percentage of open area of described baffle plate is between 30-40%, and small aperture is 4-8 millimeter.
Described baffle plate is 1/10-1/3 circle.
Described gas flue has 2-6.
The gas temperature that gas flue in the middle part of the vaporizer of middle part as above symmetry is extracted out is high, by-product middle pressure steam, promotes steam quality.
Four, described rotation furnace grill comprises gas distributing cylinder fixing above supporter, gas distributing cylinder is positioned at the medullary ray of supporter, gas distributing cylinder has central vaporized chemical pipe core, there is bell jar on gas distributing cylinder top, the passage of vaporized chemical in fire grate between gas distributing cylinder and bell jar, hollow rotating bottom support body is fixed with above supporter, hollow rotating supporter top is fixed with center rest and rotatable grate plate, rotatable stove plate is 5 Rotating fields of 4 layers of gas distribution or 6 Rotating fields of 5 layers of gas distribution, concrete structure is shown in Chinese patent 201320118045.X or 201220583000.5.
GASIFIER GRATES BY METALLOGRAPHIC EXAMINATIONS as above, is namely provided with the rotation furnace grill of a gas distributing cylinder, guarantees that vaporized chemical is uniformly distributed, and is formed and stablizes fire bed, guarantees that vapourizing furnace long-term stability is run.
Beneficial effect of the present invention
1) adopt two channels coal distributing device that coal sample is arranged evenly, be conducive to forming stable fire bed.
2) third channel of two channels coal distributing device has enough circulation areas, adopts two channels again, significantly reduces the flow velocity of gas exit, reduces the band dirt problem of raw gas, reduces the particle diameter of as-fired coal.
3) drawing gasification layer gasification in the middle part of vaporizer generates not containing the coal gas of tar, main component is methane, hydrogen, carbon monoxide and carbonic acid gas, reducing the flow velocity of top gas exit simultaneously, the middle pressure steam of the coal gas of high temperature production higher quality of 450-650 DEG C can also be utilized in waste heat boiler.
4) double coal lock connects, and coal is locked gas and recycled, and reduces the punching press of coal lock and uses fresh coal gas amount, also provides a kind of possibility for promoting vaporization ability.
5) this working of an invention significantly can reduce top of gasification furnace dust-laden and pitch coal tolerance, reduces the treatment capacity of dust-laden and pitch coal air water.
Accompanying drawing explanation
Fig. 1 is process schematic representation of the present invention.
Fig. 2 is that the present invention is communicated with double coal lock feeding unit 1 front view.
Fig. 3 is that the connection double coal lock device 1 of Fig. 2 faces application drawing.
Fig. 4 is that the A of Fig. 2 coal lock gas porthole baffle plate is to figure.
Fig. 5 is static coal distributing device 2 front view of two channels.
Fig. 6 is static coal distributing device 2 left view of two channels.
Fig. 7 draws raw gas device 3 front view in the middle part of vaporizer.
Fig. 8 is that the A of Fig. 7 gas flue mouth baffle plate is to structural representation.
Fig. 9 is rotation furnace grill structural representation.
As shown in the figure, 1-is communicated with double coal lock feeding unit, the static coal distributing device of 2-two channels, raw gas device is drawn in the middle part of 3-vaporizer, 4-rotation furnace grill, 5-scrubber cooler I, 7-washing water recycle pump, 8-waste heat boiler I, 9-oiler feed water pump, 11-raw gas separator, 12-gasification agent inlet, 13-ash discharging hole, 14-supplements Coal-gas Washing Water Using, 15-gas liquor tripping device, 16-mesohigh steam, 17-waste heat boiler feeds water, 18-is through the raw gas of separator, 19-dust-laden is containing pitch coal air water, 20-cyclonic separator I, the dust that 22-cyclonic separator I is deviate from, 24-waste heat boiler II, 25-low-pressure steam.
101-double coal lock, coal lock in left side in 101a-double coal lock, coal lock in right side in 101b-double coal lock, 102-coal locks valve, in 102a-double coal lock, left side coal locks valve, in 102b-double coal lock, right side coal locks valve, the lower valve of 103-coal lock, the lower valve of left side coal lock in 103a-double coal lock, the lower valve of right side coal lock in 103b-double coal lock, 104-transitional storehouse, 105-coal lock gas passage, 106-connects coal lock access valve, 107-connects pipeline section, pipeline section is connected on the left of 107a-, pipeline section is connected on the right side of 107b-, 108-coal stopper plate, 109-coal stopper plate aperture, 110-coal lock gas passage expanding reach, 111-coal lock gas passage straight section, 112-coal lock gas passage expanding reach and coal lock the angle α of outer wall, 113-coal outlet, 114-coal inlet
201-stay bolt part, the straight tube of 202-inner core, the conically shaped of 203-inner core, 204-tapered sleeve, the straight shape sleeve of 205-, 206-static distribution device straight shape sleeve overhead gage, aperture on the straight shape sleeve of 207-static distribution device, 208-raw gas exports, 210-vapourizing furnace outer wall, 211-gasification stove internal wall, 212-two channels coal distributing device coal sample entrance, I-coal sample the 1st cloth coal channel, II-coal sample the 2nd cloth coal channel, III-raw gas passage
The gas flue of the symmetry in the middle part of 301-vaporizer, 302-baffle plate, 303-aperture, the open section of 304-baffle plate bottom, 305-vapourizing furnace outer wall, 306-gasification stove internal wall, the angle β that the gas flue in the middle part of 307-vaporizer and vapourizing furnace outer wall are formed, gas flue inwall in the middle part of vaporizer in the middle part of 308-vaporizer, the gas flue outer wall in the middle part of 309-vaporizer.
401-vaporized chemical flow-guiding channel, 402-upper support ring, 403-first qi-emitting hole, 404-second qi-emitting hole, 405-first grate plate, 406-the 3rd qi-emitting hole, 407-second grate plate, 408-the 4th qi-emitting hole, 409-the 3rd grate plate, 410-the 4th grate plate, 411-the 5th grate plate, 412-gas distributing cylinder, 413-central authorities vaporized chemical pipe core, 414-supporter, 415-center rest, 416-bell jar, 417-midfoot support body, 418-bottom support body, 419-voltage stabilizing locular wall.
Embodiment
The use further illustrate the present invention below by specific embodiment, but should be understood to, these embodiments are only used for more in detail, specifically describing, and should not be construed as limiting the present invention in any form.
General description is carried out to the material used in the present invention and test method in this part.Although for realizing many materials used in the present invention and working method is well known in the art, the present invention still describes in detail as far as possible at this.It will be apparent to those skilled in the art that within a context, if not specified, material therefor of the present invention and working method are well known in the art.
Below in conjunction with accompanying drawing, explanation is specifically done to the specific embodiment of the present invention.
Embodiment 1
Broken coal adds and press dry ash discharge vapourizing furnace, it comprises and is communicated with double coal lock feeding unit 1 and body of heater, have on body of heater and be communicated with double coal lock feeding unit 1, upper of furnace body has the static coal distributing device 2 of two channels, have in the middle part of body of heater in the middle part of vaporizer and draw raw gas device 3, lower portion of furnace body has rotation furnace grill 4, gasification agent inlet 12 and lime-ash discharge outlet 13 is had at bottom of furnace body, gasification agent inlet 12 is between rotation furnace grill 4 and lime-ash discharge outlet 13, and gasification agent inlet 12 is connected with the gas distributing cylinder 412 in rotation furnace grill 4.
One, described connection double coal lock feeding unit 1, it comprises coal lock 101, coal locks valve 102, the lower valve 103 of coal lock, coal inlet 114, transitional storehouse 104 and coal outlet 113, coal lock 101 has 2, it is coal inlets 114 that each coal locks 101 tops, that coal locks valve 102 below coal inlet 114, communicate with pipe connecting 107 top bottom coal lock 101, valve 103 under coal lock is equipped with at pipe connecting 107 top, be connected with transitional storehouse 104 bottom pipe connecting 107, the bottom of transitional storehouse 104 is coal outlet 113, is connected between 2 coal locks 101 by 1 coal lock gas path 10 5.
Described coal lock gas path 10 5 locks gas passage expanding reach 110 by two ends coal and middle coal lock gas passage straight section 111 forms, at coal lock gas passage straight section 111 built with connection coal lock access valve 106, be positioned at coal lock gas passage expanding reach 110 and lock with coal the baffle plate 108 1 wall Link Port being provided with aperture 109, the angle α 112 that coal lock gas passage expanding reach 110 wall and coal lock 101 walls is 48 degree.
Described baffle plate 108 percentage of open area is 49%, and the aperture of aperture 109 is 0.2 millimeter.
Described coal lock gas path 10 5 is positioned at the position of 0.48 times of whole coal lock height.
Double coal lock feeding unit 1 described above realizes alternation by following steps: the coal lock lower valve 103a corresponding when coal lock 101a is in atmospheric pressure state is in closing condition, after coal in coal bunker being added normal pressure coal lock 101a, close corresponding coal and lock valve 102a, another coal lock 101b sends coal into vaporizer through transitional storehouse 104 under gravity simultaneously, after coal sample all sends into vaporizer, this coal lock 101b is filled with high pressure gas, now close the lower valve 103b of coal lock of this coal lock, open be full of coal gas high pressure coal lock 101b and loaded coal sample normal pressure coal lock 101a between connect coal lock access valve 106, (101a and 101b pressure is equal to treat two coal locks, close connection two coal lock 101a with 101b and be connected coal lock access valve 106, then the coal gas in the coal lock 101b now do not coaling is extracted out, coaling after making coal lock 101b to normal pressure, two coal lock 101a and 101b alternation, carry out the filling of coal sample, coal lock gas more than 60% recycles.
Two, the inner core of the static coal distributing device 2 of described two channels is made up of straight tube 202 and conically shaped 203, the top of straight tube 202 is openings, straight tube 202 is connected with conically shaped 203 small end, mitriform sleeve is fixed with on the top of straight tube 202, mitriform sleeve is made up of tapered sleeve 204 and straight shape sleeve 205, straight shape sleeve 205 diameter is less than the outside diameter of tapered sleeve 204, straight shape sleeve 205 outer wall is fixed with plate washer 206, the free end of baffle plate 206 is downward, straight shape sleeve 205 wall of plate washer 206 position is provided with aperture 207, gas exit and stay bolt part 201, raw gas passage III is formed between mitriform sleeve and inner core, the straight tube 202 of inner core enters the 1st passage I of vapourizing furnace for coal, the 2nd passage II that coal enters vapourizing furnace is formed between mitriform sleeve and gasification stove internal wall.The static coal distributing device 2 of two channels also can adopt symmetrical two raw gas passages III.
The static coal distributing device 2 of above-mentioned two channels realizes uniform coal distributor by following steps: the static coal distributing device 2 of coal two channels in vaporizer entering vaporizer, this coal distributing device is made up of the straight tube 202 of inner core and the conically shaped 203 of inner core, define the channel structure of coal sample, a coal sample part is made to enter vapourizing furnace by the 1st passage I, another part enters vapourizing furnace the 2nd passage II by forming coal between mitriform sleeve and gasification stove internal wall enters vapourizing furnace, reaches uniform coal sample like this and arranges.The coal gas that gasification produces draws vapourizing furnace by forming raw gas passage III between mitriform sleeve and inner core.
Three, raw gas device 3 is drawn in the middle part of described vaporizer, it comprises vapourizing furnace outer wall 305, gasification stove internal wall 306 and gas flue 301, vapourizing furnace outer wall 305 and gasification stove internal wall 306 have the gas flue 301 of 2, gas flue 301 is uniformly distributed in vapourizing furnace outer wall 305 same level, the opening upwards of gas flue 301, gas flue 301 is made up of gas flue outer wall 309 and gas flue inwall 308, gas flue outer wall 309 is connected with vapourizing furnace outer wall 305, and become the angle β 307 of 42 degree, gas flue inwall 308 is connected with gasification stove internal wall 306, the baffle plate 302 of aperture 303 is provided with at gas flue inwall 308 and the junction, upper middle part of gasification stove internal wall 306, baffle plate 302 is parallel with gasification stove internal wall 306.
Gas flue 301 is meterings from bottom vaporizer in the position of gasification stove internal wall 306, is 0.41 times of vaporizer height.The percentage of open area of baffle plate 302 is between 30, and aperture 303 aperture is 8 millimeters.Baffle plate 302 is 1/3 circle.
Four, the fire grate device 4 that vaporizer bottom is provided with rotation comprises the fixing gas distributing cylinder 412 of supporter 414 above, gas distributing cylinder 412 is positioned at the medullary ray of supporter 414, gas distributing cylinder 412 has central vaporized chemical pipe core 413, there is bell jar 416 on gas distributing cylinder top, the passage of vaporized chemical in fire grate between gas distributing cylinder 412 and bell jar 416, supporter 414 is fixed with hollow rotating bottom support body 418 above, hollow rotating supporter 418 top is fixed with center rest 415 and rotatable grate plate, rotatable stove plate is 5 Rotating fields of 4 layers of gas distribution.Be followed successively by the first grate plate 405 from top to bottom, second grate plate 407, five layers of fire grate structure of 4 layers of gas distribution of the 3rd grate plate the 409, four grate plate 410 and the 5th grate plate 411, are positioned at upper support above the first grate plate 405 for supporting upper support ring 402 and voltage stabilizing locular wall 419.A vaporized chemical flow-guiding channel 401 is formed between two grate plates, vaporized chemical first qi-emitting hole 403 of vaporized chemical by the upper support ring 402 under grate plate is opened, second qi-emitting hole 404,3rd qi-emitting hole 406,4th qi-emitting hole 408 enters vaporized chemical flow-guiding channel 401 uniformly, then enters vapourizing furnace and lime-ash carries out heat exchange.
Adopt the low-rank coal of moisture 35% to gasify, vapor pressure is 4.0MPa, gasification temperature 1050 DEG C, and it is 5-50mm coal sample that coal sample obtains particle diameter after fragmentation, screening, and loading coal bunker is that raw material is got in gasification ready, is then implemented by following steps:
The broken coal of 5-50mm is entered vaporizer top through being communicated with double coal lock feeding unit 1, after being uniformly distributed by the static coal distributing device 2 of two channels, relying on action of gravity slowly to decline and to burn each bed through super-dry, destructive distillation, methanation, gasification and carbon residue from top to bottom.Vaporized chemical enters bottom vaporizer through gasification agent inlet 12, by rotation furnace grill 4, under the booster action of hot lime-ash, is uniformly distributed in zone of combustion bed.In the process, ash is cooled to 350 DEG C, discharges vaporizer by lime-ash discharge outlet 13; Vaporized chemical after preheating is upwards by zone of combustion, and in zone of combustion, oxygen and remaining coal char combustion major part generate CO
2zone of combustion is the region that gasifier temperature is the highest, for other reactions on top provide heat, along with hot gas rises through gasification layer along vaporizer, generate most of synthetic gas, continue to rise to methanation layer, generating portion methane gas again, methane gas and synthetic gas extract 58% out when methanation layer is by drawing raw gas device 3 in the middle part of vaporizer, the raw gas that temperature is 480 DEG C, through cyclonic separator I 20 dedusting, the raw gas temperature after the raw gas making dust content be less than 1mg/L enters waste heat boiler I 8 recovery waste heat drops to 235 DEG C.
The raw gas of methanation layer residue 42% heats the coal sample declined through destructive distillation layer, coal sample pyrolysis output is made to contain the rich hydrogen volatile matter of gas, steam and tar, along with gas rises further, be able to further cooling from the volatile matter of dry distillation area and synthetic gas on vapourizing furnace top, coal is then able to preheating and drying.The raw gas of temperature between 215 DEG C is drawn eventually through the raw gas passage III on the static coal distributing device 2 of two channels, after scrubber cooler I 5, temperature is down to about 195 DEG C, then the raw gas dropping to 235 DEG C with temperature after waste heat boiler I 8 recovery waste heat mixes, enter waste heat boiler II 24 recovery waste heat, the temperature of raw gas is made to be down to 180 DEG C, isolate the raw gas 18 after phlegma through gas-liquid separator 11 and deliver to lower procedure, gas liquor tripping device 15 gas recovery water sent to by washing phlegma.
The gas liquor of the dust-laden washed from scrubber cooler I 5 enters bottom initial gross separation dirt and the water of waste heat boiler II 24 with coal gas, the gas liquor of major part not dust-laden is pressurizeed by coal gas washing cycling water pump 7 and supplementary Coal-gas Washing Water Using 14 mix after turn back to scrubber cooler I 5 and recycle, the gas liquor gas delivery water separation device 15 of all the other dust-ladens reclaims.
Plant area is sent from the isolated dust 22 of cyclonic separator I 20.
Oiler feed 17 needed for waste heat boiler II 24 is through after oiler feed water pump 9 is pressurized to 4.2MPa and sends into the low-pressure steam that waste heat boiler II 24 generation temperature is 162 DEG C, a part feeds water as waste heat boiler I 8, produce mesohigh steam 16, another part is as low-pressure steam product 25.
Embodiment 2
Adopt the smokeless coal gasification of moisture 6%, vapor pressure is 5.0MPa, gasification temperature 1250 DEG C, and it is 5-50mm coal sample that coal sample obtains particle diameter after fragmentation, screening, and loading coal bunker is that raw material is got in gasification ready, is then implemented by following steps:
The broken coal of 5-50mm is entered vaporizer top through being communicated with double coal lock feeding unit 1, after being uniformly distributed by the static coal distributing device 2 of two channels, relying on action of gravity slowly to decline and to burn each bed through super-dry, destructive distillation, methanation, gasification and carbon residue from top to bottom.Vaporized chemical enters bottom vaporizer through gasification agent inlet 12, by rotation furnace grill 4, under the booster action of hot lime-ash, is uniformly distributed in zone of combustion bed.In the process, ash is cooled to 390 DEG C, discharges vaporizer by lime-ash discharge outlet 13; Vaporized chemical after preheating is upwards by zone of combustion, and in zone of combustion, oxygen and remaining coal char combustion major part generate CO
2zone of combustion is the region that gasifier temperature is the highest, for other reactions on top provide heat, along with hot gas rises through gasification layer along vaporizer, generate most of synthetic gas, continue to rise to methanation layer, generating portion methane gas again, methane gas and synthetic gas extract 36% out when methanation layer is by drawing raw gas device 3 in the middle part of vaporizer, the raw gas that temperature is 680 DEG C, through cyclonic separator I 20 dedusting, the raw gas temperature after the raw gas making dust content be less than 1mg/L enters waste heat boiler I 8 recovery waste heat drops to 251 DEG C.
The raw gas of methanation layer residue 64% heats the coal sample declined through destructive distillation layer, coal sample pyrolysis output is made to contain the rich hydrogen volatile matter of gas, steam and tar, along with gas rises further, be able to further cooling from the volatile matter of dry distillation area and synthetic gas on vapourizing furnace top, coal is then able to preheating and drying.The raw gas of temperature between 220 DEG C is drawn eventually through the raw gas passage III on the static coal distributing device 2 of two channels, after scrubber cooler I 5, temperature is down to about 200 DEG C, then the raw gas dropping to 251 DEG C with temperature after waste heat boiler I 8 recovery waste heat mixes, enter waste heat boiler II 24 recovery waste heat, the temperature of raw gas is made to be down to about 180 DEG C, isolate the raw gas 18 after phlegma through gas-liquid separator 11 and deliver to lower procedure, gas liquor tripping device 15 gas recovery water sent to by washing phlegma.
The gas liquor of the dust-laden washed from scrubber cooler I 5 enters bottom initial gross separation dirt and the water of waste heat boiler II 24 with coal gas, the gas liquor of major part not dust-laden is pressurizeed by coal gas washing cycling water pump 7 and supplementary Coal-gas Washing Water Using 14 mix after turn back to scrubber cooler I 5 and recycle, the gas liquor gas delivery water separation device 15 of all the other dust-ladens reclaims.
Plant area is sent from the isolated dust 22 of cyclonic separator I 20.
Oiler feed 17 needed for waste heat boiler II 24 is through after oiler feed water pump 9 is pressurized to 5.3MPa and sends into the low-pressure steam that waste heat boiler II 24 generation temperature is 179 DEG C, a part feeds water as waste heat boiler I 8, produce mesohigh steam 16, another part is as low-pressure steam product 25.
Being communicated with double coal lock device has 1 to lock gas path 10 5 to the coal of symmetry, position between be metered into vaporizer height from valve 103 under coal lock 0.52, it is 45 ° that expanding reach 110 and coal lock the angle 112 that outer wall becomes, the percentage of open area of baffle plate is 52%, and on coal stopper plate 108, the aperture of aperture 109 is 0.5 millimeter.
By being provided with 3 gas flues 101 in the middle part of vapourizing furnace, extract the raw gas of 36% out, gas flue 101 is meterings from bottom vaporizer in the position of gasification stove internal wall 106, is 0.41 times of vaporizer height.Angle 107 is 35 degree, and the percentage of open area of baffle plate is 6.4 millimeters in 34% aperture 103 aperture, and baffle plate 102 is 1/6 circle, and remaining 64% raw gas is drawn by the raw gas passage III through vaporizer top after destructive distillation and drying layer.All the other are with embodiment 1.
Embodiment 3
Adopt the para-bituminous coal of moisture 20% to gasify, vapor pressure is 5.4MPa, gasification temperature 1150 DEG C, and it is 5-50mm coal sample that coal sample obtains particle diameter after fragmentation, screening, and loading coal bunker is that raw material is got in gasification ready, is then implemented by following steps:
The broken coal of 5-50mm is entered vaporizer top through being communicated with double coal lock feeding unit 1, after being uniformly distributed by the static coal distributing device 2 of two channels, relying on action of gravity slowly to decline and to burn each bed through super-dry, destructive distillation, methanation, gasification and carbon residue from top to bottom.Vaporized chemical enters bottom vaporizer through gasification agent inlet 12, by rotation furnace grill 4, under the booster action of hot lime-ash, is uniformly distributed in zone of combustion bed.In the process, ash is cooled to 350 DEG C, discharges vaporizer by lime-ash discharge outlet 13; Vaporized chemical after preheating is upwards by zone of combustion, and in zone of combustion, oxygen and remaining coal char combustion major part generate CO
2zone of combustion is the region that gasifier temperature is the highest, for other reactions on top provide heat, along with hot gas rises through gasification layer along vaporizer, generate most of synthetic gas, continue to rise to methanation layer, generating portion methane gas again, methane gas and synthetic gas extract 5% out when methanation layer is by drawing raw gas device 3 in the middle part of vaporizer, the raw gas that temperature is 550 DEG C, through cyclonic separator I 20 dedusting, the raw gas temperature after the raw gas making dust content be less than 1mg/L enters waste heat boiler I 8 recovery waste heat drops to 245 DEG C.
The raw gas of methanation layer residue 95% heats the coal sample declined through destructive distillation layer, coal sample pyrolysis output is made to contain the rich hydrogen volatile matter of gas, steam and tar, along with gas rises further, be able to further cooling from the volatile matter of dry distillation area and synthetic gas on vapourizing furnace top, coal is then able to preheating and drying.The raw gas of temperature between 235 DEG C is drawn eventually through the raw gas passage III on the static coal distributing device 2 of vaporizer top two channels, after scrubber cooler I 20, temperature is down to about 200 DEG C, then the raw gas dropping to 225 DEG C with temperature after waste heat boiler I 8 recovery waste heat mixes, enter waste heat boiler II 9 recovery waste heat, the temperature of raw gas is made to be down to about 180 DEG C, isolate the raw gas 18 after phlegma through gas-liquid separator 11 and deliver to lower procedure, washing phlegma is sent to gas liquor tripping device 15 and is reclaimed.
The gas liquor of the dust-laden washed from scrubber cooler I 5 enters bottom initial gross separation dirt and the water of waste heat boiler II 24 with coal gas, the gas liquor of major part not dust-laden is pressurizeed by coal gas washing cycling water pump 7 and supplementary Coal-gas Washing Water Using 14 mix after turn back to scrubber cooler 5 and recycle, the gas liquor gas delivery water separation device 15 of all the other dust-ladens reclaims.
Plant area is sent from the isolated dust 22 of cyclonic separator I 20.
Oiler feed 17 needed for waste heat boiler II 24 is through after oiler feed water pump 9 is pressurized to 5.9MPa and sends into the low-pressure steam that waste heat boiler II 24 generation temperature is 167 DEG C, a part feeds water as waste heat boiler I 8, produce mesohigh steam 16, another part is as low-pressure steam product 25.
Be communicated with double coal lock device and have 1 coal lock gas path 10 5, position between be metered into vaporizer height from valve 103 under coal lock 0.46, it is 33 ° that expanding reach 110 and coal lock the angle 112 that outer wall becomes, the percentage of open area of coal stopper plate is between 63%, and the aperture of coal stopper plate aperture 109 is 0.8 millimeter.
By being provided with 3 gas flues 301 in the middle part of vaporizer, extract the raw gas of 5% out, in the middle part of vaporizer, the position of gas flue 301 gasification stove internal wall 306 in the middle part of vaporizer is meterings from bottom vaporizer, 0.45 times of vaporizer height.Angle 307 is 32 degree, and the percentage of open area of baffle plate is 32%, and aperture 303 aperture is 4.4 millimeters, and baffle plate 302 is 1/9 circle, and remaining 95% raw gas is drawn by the raw gas passage III through vaporizer top after destructive distillation and drying layer.All the other are with embodiment 1.
Claims (14)
1. a technique for energy-saving coal clean gas, is characterized in that comprising the steps:
(1) broken coal of 5-50mm is entered vaporizer top through being communicated with double coal lock feeding unit (1), after being uniformly distributed by the static coal distributing device (2) of two channels, rely on action of gravity slowly to decline and to burn each bed through super-dry, destructive distillation, methanation, gasification and carbon residue from top to bottom, vaporized chemical enters bottom vaporizer through gasification agent inlet (12), by rotation furnace grill (4), ash is cooled to 300-400 DEG C, discharges vaporizer by lime-ash discharge outlet (13); Vaporized chemical after preheating is upwards by zone of combustion, and in zone of combustion, oxygen and remaining coal char combustion major part generate CO
2along with hot gas rises through gasification layer along vaporizer, generate most of synthetic gas, continue to rise to methanation layer, generating portion methane gas, methane gas and synthetic gas extract volume ratio 5-60% out when methanation layer is by drawing raw gas device (3) in the middle part of vaporizer, the raw gas of temperature 450-700 DEG C, through cyclonic separator I (20) dedusting, the raw gas temperature after the raw gas making dust content be less than 1mg/L enters waste heat boiler I (8) recovery waste heat drops to 200-260 DEG C;
(2) raw gas of methanation layer residue 40-95% heats the coal sample declined through destructive distillation layer, coal sample pyrolysis output is made to contain gas, the rich hydrogen volatile matter of steam and tar, along with gas rises further, further cooling is able on vapourizing furnace top from the volatile matter of dry distillation area and synthetic gas, coal is then able to preheating and drying, the raw gas of temperature between 210-300 DEG C is drawn eventually through the raw gas passage (III) on the static coal distributing device (2) of vaporizer top two channels, after scrubber cooler I (5), temperature is down to 200-210 DEG C, then the raw gas dropping to 200-260 DEG C with temperature after waste heat boiler I (8) recovery waste heat mixes, enter waste heat boiler II (24) recovery waste heat, the temperature of raw gas is made to be down to 170-190 DEG C, raw gas (18) after phlegma isolated by gas-liquid separator (11) delivers to lower procedure, gas liquor tripping device (15) gas recovery water sent to by washing phlegma,
(3) gas liquor of the dust-laden washed from scrubber cooler I (5) enters bottom initial gross separation dirt and the water of waste heat boiler II (24) with coal gas, the gas liquor of major part not dust-laden is pressurizeed by coal gas washing cycling water pump (7) and supplementary Coal-gas Washing Water Using (14) mix after turn back to scrubber cooler I (5) and recycle, the gas liquor gas delivery water separation device (15) of all the other dust-ladens reclaims, after gas liquor tripping device (15) isolates dirt and oil, the gas liquor pressurization that separation obtains turns back to scrubber cooler I (5) and recycles,
(4) plant area is sent from the isolated dust of cyclonic separator II (20) (22);
(5) the required oiler feed (17) of waste heat boiler II (24) is through after oiler feed water pump (9) is pressurized to 4.0MPa-6.0MPa and sends into the low-pressure steam that waste heat boiler II (24) generation temperature is 161-181 DEG C, a part feeds water as waste heat boiler I (8), produce mesohigh steam (16), another part is as low-pressure steam product (25).
2. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 1 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that it comprises and be communicated with double coal lock feeding unit (1) and body of heater, have on body of heater and be communicated with double coal lock feeding unit (1), upper of furnace body has the static coal distributing device (2) of two channels, have in the middle part of body of heater in the middle part of vaporizer and draw raw gas device (3), lower portion of furnace body has rotation furnace grill (4), gasification agent inlet (12) and lime-ash discharge outlet (13) is had at bottom of furnace body, gasification agent inlet (12) is positioned between rotation furnace grill (4) and lime-ash discharge outlet (13), gasification agent inlet (12) is connected with the gas distributing cylinder (412) in rotation furnace grill (4).
3. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 2 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that described connection double coal lock feeding unit (1), it comprises coal lock (101), coal locks valve (102), , the lower valve (103) of coal lock, coal inlet (114), transitional storehouse (104) and coal outlet (113), coal lock (101) has 2, each coal lock (101) top is coal inlet (114), coal inlet (114) below is that coal locks valve (102), coal lock (101) bottom communicates with pipe connecting (107) top, valve (103) under coal lock is equipped with at pipe connecting (107) top, pipe connecting (107) bottom is connected with transitional storehouse (104), the bottom of transitional storehouse (104) is coal outlet (113), be connected by least 1 coal lock gas passage (105) between 2 coals lock (101).
4. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 3 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that described coal lock gas passage (105) locks gas passage expanding reach (110) by two ends coal and middle coal lock gas passage straight section (111) forms, at coal lock gas passage straight section (111) built with connection coal lock access valve (106), be positioned at coal lock gas passage expanding reach 110 and lock with coal the baffle plate (108) (1) wall Link Port being provided with aperture (109), the angle α (112) that coal lock gas passage expanding reach (110) wall and coal lock (101) wall is 30-60 °.
5. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 4 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that described baffle plate (108) percentage of open area is between 45-65%, the aperture of aperture (109) is 0.2-1.0 millimeter.
6. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 3 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that described coal lock gas passage (105) whole coal lock height 0.45-0.55 doubly between position.
7. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 2 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that the static coal distributing device (2) of described two channels is by static coal distributing device coal sample entrance (212) of two channels, inner core, coal sample enters the 1st passage (I) of vaporizer, and coal sample enters the 2nd passage (II) and raw gas passage (III) composition of vaporizer.
8. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 7 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that the static coal distributing device (2) of described two channels adopts symmetrical two gas flues (III).
9. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 2 uses adds and press dry ash discharge vapourizing furnace, it comprises vapourizing furnace outer wall (305) to it is characterized in that drawing raw gas device (3) in the middle part of described vaporizer, gasification stove internal wall (306) and gas flue (301), vapourizing furnace outer wall (305) and gasification stove internal wall (306) have the gas flue (301) of at least 2, gas flue (301) is uniformly distributed in vapourizing furnace outer wall (305) same level, the opening upwards of gas flue (301), gas flue (301) is made up of gas flue outer wall (309) and gas flue inwall (308), gas flue outer wall (308) is connected with vapourizing furnace outer wall (305), and become the angle β (307) of 30-45 degree, gas flue inwall (308) is connected with gasification stove internal wall (306), the baffle plate (302) of aperture (303) is provided with at gas flue inwall (308) and the junction, upper middle part of gasification stove internal wall (306), baffle plate (302) is parallel with gasification stove internal wall (306).
10. the broken coal that the technique of a kind of energy-saving coal clean gas as claimed in claim 9 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that described gas flue (301) is metering from bottom vaporizer in the position of gasification stove internal wall (306), is 0.41-0.62 times of vaporizer height.
The broken coal that the technique of 11. a kind of energy-saving coal clean gas as claimed in claim 9 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that the percentage of open area of described baffle plate (302) is between 30-40%, aperture (303) aperture is 4-8 millimeter.
The broken coal that the technique of 12. a kind of energy-saving coal clean gas as claimed in claim 9 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that described baffle plate (302) is for 1/10-1/3 circle.
The broken coal that the technique of 13. a kind of energy-saving coal clean gas as claimed in claim 9 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that described gas flue (1) has 2-6.
The broken coal that the technique of 14. a kind of energy-saving coal clean gas as claimed in claim 2 uses adds and press dry ash discharge vapourizing furnace, it is characterized in that described rotation furnace grill (4) comprises the fixing gas distributing cylinder (412) of supporter (414) above, gas distributing cylinder (412) is positioned at the medullary ray of supporter (414), gas distributing cylinder (412) has central vaporized chemical pipe core (413), there is bell jar (416) on gas distributing cylinder top, the passage of vaporized chemical in fire grate between gas distributing cylinder (412) and bell jar (416), supporter (414) is fixed with hollow rotating bottom support body (418) above, hollow rotating supporter (418) top is fixed with center rest (415) and rotatable grate plate, rotatable stove plate is 5 Rotating fields of 4 layers of gas distribution or 6 Rotating fields of 5 layers of gas distribution.
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