CN103115478B - Drying equipment - Google Patents
Drying equipment Download PDFInfo
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- CN103115478B CN103115478B CN201310053143.4A CN201310053143A CN103115478B CN 103115478 B CN103115478 B CN 103115478B CN 201310053143 A CN201310053143 A CN 201310053143A CN 103115478 B CN103115478 B CN 103115478B
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- 238000001035 drying Methods 0.000 title claims abstract description 209
- 239000000463 material Substances 0.000 claims abstract description 75
- 239000011261 inert gas Substances 0.000 claims abstract description 70
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 46
- 239000002918 waste heat Substances 0.000 claims description 38
- 239000000428 dust Substances 0.000 claims description 36
- 238000011084 recovery Methods 0.000 claims description 25
- 238000007664 blowing Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 230000009021 linear effect Effects 0.000 claims description 4
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 21
- 239000002360 explosive Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UBCKGWBNUIFUST-YHYXMXQVSA-N tetrachlorvinphos Chemical compound COP(=O)(OC)O\C(=C/Cl)C1=CC(Cl)=C(Cl)C=C1Cl UBCKGWBNUIFUST-YHYXMXQVSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention provides drying equipment which comprises an inert gas feeding device, a vibration fluidized drying device and a multichannel microwave drying device. The inert gas feeding device is connected with the vibration fluidized drying device and the multichannel microwave drying device through pipelines and used for inputting inert gases to the vibration fluidized drying device and the multichannel microwave drying device. A wet material feeding valve is for feeing wet materials is arranged on the vibration fluidized drying device, and the vibration fluidized drying device is further provided with a pre-drying material discharge valve for discharging the wet materials after the wet materials undergo fluidized drying. A discharge port portion of the pre-drying material discharge valve is connected with a material discharge channel for conveying pre-drying materials to the multichannel microwave drying device which is connected with the material discharge channel. The multichannel microwave drying device is further provided with an end product drying material discharge valve for discharging the pre-drying materials after the pre-drying materials undergo microwave drying.
Description
Technical field
The present invention relates to the technical field of coal drying, particularly relate to a kind of drying equipment.
Background technology
Low-order coal (comprising the coal slime after brown coal, ub-bituminous coal and washing) is containing a lot of inherent water, and Coal ' moisture is not up to 15%-70% etc.Coal resource enriches at a low price, if not because water is high in it, is a kind of fuel or industrial chemicals of high-quality, therefore reduces the interior water in existing low-order coal, significant to raising ature of coal.
Because High water cut coal (low-order coal) caloric value is low, low-order coal being carried out drying is the effective way improving ature of coal.In current drying means, general employing rotary drier, fluidized bed dryer, tube drier, spiral dryer and vibration percolation bed dryer etc., the various coal heat-force dry techniques adopted are after hot-blast stove adds hot-air, its high-temperature gas produced enters drying equipment, after high-temperature gas and hydrogenous coal complete mass heat transfer, to realize coal drying.Wherein hot-air flows through in drying equipment after forming negative pressure by air-introduced machine, discharged to air after the dust in removing hot blast.
It has following shortcoming:
Under oxygen enrichment state, no matter high temperature or low temperature drying technology and equipment, because coal contacts in heat exchanging process with middle high-temperature flue gas, produce the flammable explosive gas such as coal dust, carbon monoxide, methane, under dry gas is rich in Oxygen Condition, all there is burning or the explosion danger of flammable explosive gas and the coal dust produced in dry run, easily cause the generation of explosion accident, safety in production is caused a hidden trouble and endangers.In dry run, easily produce a large amount of coal dusts and enter in dried tail gas circulation, use current control of dust technology and equipment to be difficult to reach the effect of dried tail gas control of dust and condensation, easily cause the pollution of surrounding air and water.Because dried tail gas takes away a part of heat energy and heating power, make the efficiency of water in dried material lower, the efficiency of heating surface and the energy utilization rate of drying system are lower.Heat-force dry equipment comprises boiler, drier, tail gas condensing dust-collecting equipment etc., its area taken and larger etc. the defect of volume.
Summary of the invention
The object of the invention is to overcome defect of the prior art, provide a kind of use safety, structure simple drying equipment.
Technical scheme of the present invention provides a kind of drying equipment, comprise inert gas feedway, vibratory fluidized drying device and Multi-channel microwave drying device, wherein said inert gas feedway is connected with described Multi-channel microwave drying device with described vibratory fluidized drying device respectively by pipeline, for inputting inert gas in described vibratory fluidized drying device and described Multi-channel microwave drying device; Described vibratory fluidized drying device is provided with the wet stock supply valve for supplying wet stock, described vibratory fluidized drying device is also provided with the predrying material dump valve of discharging after fluidized drying for described wet stock, the outlet mouth of described predrying material dump valve is connected with the discharging channel for carrying predrying material to described Multi-channel microwave drying device; Described Multi-channel microwave drying device is connected with described discharging channel, described Multi-channel microwave drying device is also provided with the finished product dried material dump valve of discharging after microwave drying for described predrying material; This drying equipment its also comprise waste heat recovery EGR, described waste heat recovery EGR is connected with described Multi-channel microwave drying device, convert by electric energy the waste heat produced in microwave and microwave importing process to for reclaiming in described Multi-channel microwave drying device, described waste heat recovery EGR is connected with described inert gas feedway, recycles for the waste heat of recovery being delivered to described inert gas feedway.
Further, it also comprises tail gas recycle EGR, described tail gas recycle EGR is connected with described Multi-channel microwave drying device with described vibratory fluidized drying device respectively, for reclaiming the tail gas produced in described vibratory fluidized drying device and described Multi-channel microwave drying device, described tail gas recycle EGR is connected with described inert gas feedway, for by the tail gas of recovery through control of dust, dewater after be delivered to described inert gas feedway and recycle.
Further, described inert gas feedway comprises hot-blast stove and air blast, is provided with pressure-reducing cushioning device in the exhaust duct of described air blast.
Further, described vibratory fluidized drying device comprises a body, be arranged at isolation spring bottom described bed body, be arranged at shock electric machine bottom described bed body, be arranged at bottom described bed body for spraying multiple bottom blowing nozzle of inert gas and being arranged in described vibratory fluidized drying device the multiple top blast nozzles being positioned at described bed body top, be connected with bottom blowing air collecting box between the pipeline of described bottom blowing nozzle and described inert gas feedway, between the pipeline of described top blast nozzle and described inert gas feedway, be connected with top blast duct set.
Further, described top blast duct set comprises a collection wind house steward and many collection wind are in charge of, describedly collect the centre that wind house steward projection is vertically positioned at described bed body, many collection wind is in charge of the both sides being arranged at described collection wind house steward equably, and every bar collection wind is in charge of and is provided with multiple described top blast nozzle.
Further, multiple described bottom blowing nozzle is many and is linearly arranged in described bed body bottom equably, describedly collects the bottom blowing nozzle that wind is in charge of projection on described bed body and linear array and is parallel to each other.
Further, described Multi-channel microwave drying device comprises and carries the material-conveying belt of described predrying material and be arranged in described Multi-channel microwave drying device for carrying out the microwave dryer of microwave drying treatment to described predrying material.
Further, multiple microwave generators that described microwave dryer comprises waveguide arm, waveguide house steward and is positioned at above described material-conveying belt, wherein each described microwave generator comprises and is positioned at upper waveguide cover above described material-conveying belt and is positioned at lower waveguide cover for receive repercussions corresponding with described upper waveguide cover below described material-conveying belt, each described lower waveguide cover is all connected with described waveguide arm, and described waveguide arm is connected with described waveguide house steward for the waste heat received in multiple described lower waveguide cover is collected to described waveguide house steward.
Further, described Multi-channel microwave drying device comprises material-conveying belt and microwave dryer, multiple microwave generators that described microwave dryer comprises waveguide arm, waveguide house steward and is positioned at above described material-conveying belt, wherein each described microwave generator comprises and is positioned at upper waveguide cover above described material-conveying belt and is positioned at lower waveguide cover for receive repercussions corresponding with described upper waveguide cover below described material-conveying belt, and each described lower waveguide cover is all connected with described waveguide arm; Described waste heat recovery EGR comprises thermoconverter, described waveguide house steward is connected by pipeline with waste heat recovery EGR, described waveguide arm is connected for the waste heat received in multiple described lower waveguide cover is collected to described waveguide house steward with described waveguide house steward, again by Water transport extremely described thermoconverter, be passed to described inert gas feedway after converting described waste heat to hot blast via described thermoconverter and recycle.
Further, the condenser that described tail gas recycle EGR comprises dust arrester and is connected with described dust arrester, described vibratory fluidized drying device is provided with the vibratory fluidized drying device blast pipe be connected with described dust arrester, described Multi-channel microwave drying device is provided with the Multi-channel microwave drying device blast pipe be connected with described dust arrester.
Further, the tail gas produced in described vibratory fluidized drying device in turn through described vibratory fluidized drying device blast pipe, enter control of dust in described dust arrester, enter after described condenser dewaters, be passed to described inert gas feedway and recycle; The tail gas produced in described Multi-channel microwave drying device in turn through described Multi-channel microwave drying device blast pipe, enter control of dust in described dust arrester, enter after described condenser dewaters, be passed to described inert gas feedway and recycle.
Further, the pipeline be connected between described inert gas feedway with described Multi-channel microwave drying device is provided with the gauge tap for controlling inert gas flow.
Further, less than 90 DEG C are remained on by the temperature of the withering described predrying material of microwave in described Multi-channel microwave drying device.
Further, the inert gas produced in described inert gas feedway comprises nitrogen and carbon dioxide.
Further, described wet stock supply valve, described predrying material dump valve and described finished product dried material dump valve are star-shape feeding valve.
Further, in described inert gas feedway, oxygen concentration is no more than 8%.
Adopt technique scheme, there is following beneficial effect:
Dry materials is made to be in the inert gas environment of anoxic by arranging inert gas feedway, material air-isolation in the inlet and outlet process of vibratory fluidized drying device and Multi-channel microwave drying device is made by wet stock supply valve, predrying material dump valve and finished product dried material dump valve star-shape feeding valve, remain material dry process in an inert atmosphere, how high baking temperature is does not exist the burning of inflammable and explosive gas and dust or the potential safety hazard of blast.Before the whole dry heat of shorter microwave drying time, adopt convection type dry heat, material water ratio is significantly reduced.
Material is first dry in advance through vibratory fluidized drying device, then enters Multi-channel microwave drying device and carry out drying, improves drying efficiency.The Quick uniform drying of heating using microwave reduces the possibility of overheated, the case-hardening in surface and stress crack, improves the quality of product.
Integral system equipment makes equipment compacter, and equipment size reduces, only accounts for very little floor space.Waste heat, tail gas are recycled, and saved the energy, have reduced environmental pollution.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of drying equipment provided by the invention;
Fig. 2 is for a kind of drying equipment shown in Fig. 1 is along the sectional view in C-C direction;
Fig. 3 is for a kind of drying equipment shown in 1 is along the sectional view in A-A direction;
Fig. 4 is for a kind of drying equipment shown in 1 is along the sectional view in B-B direction.
The Reference numeral table of comparisons:
100-inert gas feedway; 101-hot-blast stove; 102-pressure-reducing cushioning device;
103-air blast; 104-air blast; 105-pipeline;
106-gauge tap;
200-vibratory fluidized drying device; 201-bed body; 202-isolation spring;
203-shock electric machine; 204-wet stock supply valve; 205-predrying material dump valve;
206-discharging channel; 207-collection wind house steward; 208-collection wind is in charge of;
209-bottom blowing air collecting box; 210-bottom blowing nozzle; 211-top blast nozzle;
212-vibratory fluidized drying device blast pipe; 213-pipeline;
300-Multi-channel microwave drying device; 301-material-conveying belt; 302-drive;
303-microwave dryer; 304-microwave generator; 305-upper waveguide cover;
306-lower waveguide cover; 307-waveguide arm; 308-waveguide house steward;
309-finished product dried material dump valve; 310-Multi-channel microwave drying device blast pipe;
311-pipeline;
400-waste heat recovery EGR; 401-thermoconverter; 402-collector;
500-tail gas recycle EGR; 501-dust arrester; 502-condenser;
503-blower fan;
D-fuel; E-discharge air; F-wet stock; G-predrying material;
H-finished product dried material; J-air; K-cooling water; L-hot water;
M-control of dust; N-condensation.
Detailed description of the invention
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of drying equipment provided by the invention, comprise inert gas feedway 100, vibratory fluidized drying device 200 and Multi-channel microwave drying device 300, wherein inert gas feedway 100 is connected with Multi-channel microwave drying device 300 with vibratory fluidized drying device 200 for inputting inert gas in vibratory fluidized drying device 200 and Multi-channel microwave drying device 300 respectively by pipeline 105; This vibratory fluidized drying device 200 is provided with the wet stock supply valve 204 for supplying wet stock F, this vibratory fluidized drying device 200 is also provided with the predrying material dump valve 205 of discharging after fluidized drying for wet stock F, the outlet mouth of this predrying material dump valve 205 is connected with the discharging channel 206 for carrying predrying material G to Multi-channel microwave drying device 300; This Multi-channel microwave drying device 300 is connected with discharging channel 206, this Multi-channel microwave drying device 300 is also provided with the finished product dried material dump valve 309 of discharging after microwave drying for predrying material G.
Inert gas feedway 100:
Above-mentioned inert gas feedway 100 comprises hot-blast stove 101 and air blast 104, is provided with pressure-reducing cushioning device 102 in the exhaust duct of this air blast 104.
A set of gas or solid combustion device or hot-blast stove 101 is introduced in inert gas feedway 100, fuel D enters hot-blast stove 101, or fuel gas (or solid) is when burning, can by the oxygen burning-off in air, remaining nitrogen and carbon dioxide make drying medium.Due in Sui's process, in system, certainly lead to excess gas, thus pressure in increasing.In order to make the continued operation of system energy, so must at the in-built venting pressure-reducing cushioning device 102 of air blast 104 exhaust duct, portion gas can be entered air when pressure is added to a certain value.
Preferably, a kind of drying equipment provided by the invention, it also comprises tail gas recycle EGR 500, this tail gas recycle EGR 500 is connected with Multi-channel microwave drying device 300 with vibratory fluidized drying device 200 respectively for reclaiming the tail gas produced in vibratory fluidized drying device 200 and Multi-channel microwave drying device 300, this tail gas recycle EGR 500 be connected with inert gas feedway 100 for by the tail gas of recovery through control of dust, dewater after be delivered to inert gas feedway 100 and recycle.
Preferably, a kind of drying equipment provided by the invention, it also comprises waste heat recovery EGR 400, this waste heat recovery EGR 400 is connected with Multi-channel microwave drying device 300 and converts by electric energy the waste heat produced in microwave and microwave importing process for reclaiming in Multi-channel microwave drying device 300 to, and this waste heat recovery EGR 400 is connected with inert gas feedway 100 and recycles for the waste heat of recovery is delivered to inert gas feedway 100.
Vibratory fluidized drying device 200:
As shown in Figure 1-2, vibratory fluidized drying device 200 comprises a body 201, be arranged at the isolation spring 202 bottom a body 201, be arranged at the shock electric machine 203 bottom a body 201, be arranged at bottom a body 201 for spraying multiple bottom blowing nozzles 210 of inert gas and being arranged in vibratory fluidized drying device 200 the multiple top blast nozzles 211 being positioned at a body 201 top, bottom blowing air collecting box 209 is connected with between this bottom blowing nozzle 210 and pipeline 105 of inert gas feedway 100, top blast duct set is connected with between this top blast nozzle 211 and pipeline 105 of inert gas feedway 100.
Above-mentioned top blast duct set comprises a collection wind house steward 207 and many collection wind are in charge of 208, this collects the centre that wind house steward 207 projection is vertically positioned at a body 201, many collection wind are in charge of the both sides that 208 are arranged at collection wind house steward 207 equably, and every bar collection wind is in charge of on 208 and is provided with multiple top blast nozzle 211.
Multiple bottom blowing nozzle 210 is linearly arranged in a body 201 bottom equably in many, collects the bottom blowing nozzle 210 that wind is in charge of 208 projections on bed body 201 and linear array and is parallel to each other.Multiple bottom blowing nozzle 210 is arranged on a body 201 bottom uniformly, and the bottom of a body 201 is arranged in equably in many linears, every bar collects wind, and to be in charge of 208 projections on bed body 201 all parallel respectively with many straight lines that multiple bottom blowing nozzle 210 is formed, be staggered, thus be arranged on collection wind and be in charge of top blast nozzle on 208 211 and be staggeredly set with bottom blowing nozzle 210, better can carry out drying to the wet stock F entering vibratory fluidized drying device 200 and process.
The inertia dry gas that inert gas feedway 100 produces low oxygen content sends into vibratory fluidized drying device 200 by air blast 104, wet stock F enters vibratory fluidized drying device 200 by wet stock supply valve 204, bed body 201 forms fluosolids, bed body 201 bottom is provided with isolation spring 202 and shock electric machine 203, a body 201 can be made to vibrate by the effect of shock electric machine 203 and isolation spring 202, to carry out drying process to wet stock F better.Inertia dry gas sprays fully to mix with wet stock F fluosolids by bottom blowing nozzle 210 and top blast nozzle 211 and carries out heat exchange, and the moisture of wet stock F is evaporated, and the predrying material dump valve 205 of predrying material G of discharge enters Multi-channel microwave drier 300.The dry water vapour containing dust produced enters tail gas recycle EGR 500, and its water vapour condensation is discharged, and the gas of cooling promotes recirculation through blower fan 503 and gets back to inert gas feedway 100 and recycle.
Multi-channel microwave drying device 300:
As shown in Figure 1, Figure 3 and Figure 4, Multi-channel microwave drying device 300 comprises to be carried the material-conveying belt 301 of predrying material G and is arranged in Multi-channel microwave drying device 300 for carrying out the microwave dryer 303 of microwave drying treatment to predrying material G.
Multiple microwave generators 304 that microwave dryer 303 comprises waveguide arm 307, waveguide house steward 308 and is positioned at above material-conveying belt 301, wherein each microwave generator 304 comprises and is positioned at upper waveguide cover above material-conveying belt 301 305 and is positioned at lower waveguide cover 306 for receive repercussions corresponding with upper waveguide cover 305 below material-conveying belt 301, each lower waveguide cover 306 is all connected with waveguide arm 307, and waveguide arm 307 is connected with waveguide house steward 308 for the waste heat received in multiple lower waveguide cover 306 is collected to waveguide house steward 308.By waveguide house steward 308, waste heat is delivered to waste heat recovery EGR 400 again.
Multi-channel microwave drying device 300 utilizes microwave energy preferentially to transfer on dried material hydrone, vibration and rotating in the electric field hydrone of material being produced at microwave by polarization, merit is applied on molecule, and temperature rises, and hydrone is just evaporated from predrying material G.Material-conveying belt drives rotation by drive 302, predrying material G continuous drying process on material-conveying belt 301, and the object of drying effect is reached by adjustment irradiation time and microwave power, the finished product dried material H that final drying completes discharges from finished product dried material dump valve 309, achieves the suitability for industrialized production of material micro-wave drying.
Waste heat recovery EGR 400:
As shown in Figure 1, waste heat recovery EGR 400 comprises thermoconverter 401, waveguide house steward 308 is connected by pipeline with waste heat recovery EGR 400, waveguide arm 307 is connected for the waste heat received in multiple lower waveguide cover 306 is collected to waveguide house steward 308 with waveguide house steward 308, again by Water transport to thermoconverter 401, be passed to inert gas feedway 100 after converting waste heat to hot blast via thermoconverter 401 and recycle.
After waste heat collects by waveguide house steward 308, passed to the collector 402 in waste heat recovery EGR 400, by hot water L, waste heat is passed to thermoconverter 401 again and converts hot blast to, by air blast 103, hot blast is passed to hot-blast stove 101 and recycles.Add in thermoconverter 401 air J be beneficial to realize heat conversion, and its also input in Multi-channel microwave drying device 300 cooling water K be beneficial to cooling.
Tail gas recycle EGR 500:
As shown in Figure 1, the condenser 502 that tail gas recycle EGR 500 comprises dust arrester 501 and is connected with dust arrester 501, above-mentioned vibratory fluidized drying device 200 is provided with the vibratory fluidized drying device blast pipe 212 be connected with dust arrester 501, above-mentioned Multi-channel microwave drying device 300 is provided with the Multi-channel microwave drying device blast pipe 310 be connected with dust arrester.Dust arrester 501 is connected with vibratory fluidized drying device blast pipe 212 by pipeline 213, and it is by pipeline 311 and Multi-channel microwave drying device blast pipe 310, for being siphoned away by dust in vibratory fluidized drying device 200 and Multi-channel microwave drying device 300.
The tail gas produced in vibratory fluidized drying device 200 in turn through vibratory fluidized drying device blast pipe 212, enter control of dust M in dust arrester 501, enter condenser 502, carry out after condensation N dewaters, being passed to inert gas feedway 100 by blower fan 503 and recycling; The tail gas produced in Multi-channel microwave drying device 300 in turn through Multi-channel microwave drying device blast pipe 310, enter control of dust M in dust arrester 501, enter condenser 502, carry out after condensation N dewaters, being passed to inert gas feedway 100 by blower fan 503 and recycling.
The pipeline 105 be connected between above-mentioned inert gas feedway 100 with described Multi-channel microwave drying device 300 is provided with the gauge tap 106 for controlling inert gas flow.
Preferably, less than 90 DEG C are remained on by the temperature of the withering predrying material G of microwave in Multi-channel microwave drying device 300.By controlling the time that predrying material G (coal) stops in Multi-channel microwave drying device 300, the temperature of predrying material G (coal) is made to remain on less than 90 DEG C, the hydrocarbon of short chain would not volatilize from matrix of coal, ensure that the quality of coal can not reduce.
The inert gas produced in inert gas feedway 100 comprises nitrogen and carbon dioxide.Certainly this inert gas can also can realize the inert gas of said function for other.And oxygen concentration is no more than 8% in inert gas feedway, be specially adapted to the drying being afraid of oxidation material, as prepared by coal and alloy powder.
Above-mentioned wet stock supply valve 204, predrying material dump valve 205 and finished product dried material dump valve 309 are star-shape feeding valve.Material air-isolation in the inlet and outlet process of vibratory fluidized drying device and Multi-channel microwave drying device is made by wet stock supply valve, predrying material dump valve and finished product dried material dump valve star-shape feeding valve, remain material dry process in an inert atmosphere, how high baking temperature is does not exist the burning of inflammable and explosive gas and dust or the potential safety hazard of blast.
A kind of drying equipment provided by the invention, it has following beneficial effect:
1, shorten drying time, before the whole dry heat of Multi-channel microwave drying device, adopt convection type vibratory fluidized drying device dry heat, material water ratio is significantly reduced.Enter in Multi-channel microwave drying device heating process, volume type heat is formed rapidly, causes the acceleration of transmittance process, makes be about 1/4 of convective drying required time drying time, improves drying efficiency.
2, improve product quality, in Multi-channel microwave drying device, microwave rapid and uniform heating is dry, reduces that material surface is overheated, the possibility of case-hardening and stress crack.
3, reduce the size of equipment, integral system makes structure compacter, thus needs very little floor space to realize dry materials.
4, operating cost is reduced, microwave energy in Multi-channel microwave drying device produces in a combined heat and power production system, and all reproducible waste heats, waste gas are recycled, finally decrease labour's expense, energy consumption reduces 20%-50%, save operating cost, and avoid environmental pollution.
5, improve job safety, dry for flammable or inflammable and explosive material, the security control of heating process is vital.A kind of drying equipment provided by the invention makes material drying all the time be in the inert gas environment of anoxic, and how high baking temperature is does not exist the burning of inflammable and explosive gas and dust or the potential safety hazard of blast.
Above-described is only principle of the present invention and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the principle of the invention, other modification some can also be made, also should be considered as protection scope of the present invention.
Claims (16)
1. a drying equipment, is characterized in that, comprises inert gas feedway, vibratory fluidized drying device and Multi-channel microwave drying device,
Wherein said inert gas feedway is connected with described Multi-channel microwave drying device with described vibratory fluidized drying device respectively by pipeline, for inputting inert gas in described vibratory fluidized drying device and described Multi-channel microwave drying device;
Described vibratory fluidized drying device is provided with the wet stock supply valve for supplying wet stock, described vibratory fluidized drying device is also provided with the predrying material dump valve of discharging after fluidized drying for described wet stock, the outlet mouth of described predrying material dump valve is connected with the discharging channel for carrying predrying material to described Multi-channel microwave drying device;
Described Multi-channel microwave drying device is connected with described discharging channel, described Multi-channel microwave drying device is also provided with the finished product dried material dump valve of discharging after microwave drying for described predrying material;
This drying equipment its also comprise waste heat recovery EGR, described waste heat recovery EGR is connected with described Multi-channel microwave drying device, convert by electric energy the waste heat produced in microwave and microwave importing process to for reclaiming in described Multi-channel microwave drying device, described waste heat recovery EGR is connected with described inert gas feedway, recycles for the waste heat of recovery being delivered to described inert gas feedway.
2. a kind of drying equipment according to claim 1, it is characterized in that, it also comprises tail gas recycle EGR, described tail gas recycle EGR is connected with described Multi-channel microwave drying device with described vibratory fluidized drying device respectively, for reclaiming the tail gas produced in described vibratory fluidized drying device and described Multi-channel microwave drying device, described tail gas recycle EGR is connected with described inert gas feedway, for by the tail gas of recovery through control of dust, dewater after be delivered to described inert gas feedway and recycle.
3. a kind of drying equipment according to claim 1, is characterized in that, described inert gas feedway comprises hot-blast stove and air blast, is provided with pressure-reducing cushioning device in the exhaust duct of described air blast.
4. a kind of drying equipment according to claim 1, it is characterized in that, described vibratory fluidized drying device comprises a body, be arranged at isolation spring bottom described bed body, be arranged at shock electric machine bottom described bed body, be arranged at bottom described bed body for spraying multiple bottom blowing nozzle of inert gas and being arranged in described vibratory fluidized drying device the multiple top blast nozzles being positioned at described bed body top
Be connected with bottom blowing air collecting box between the pipeline of described bottom blowing nozzle and described inert gas feedway, between the pipeline of described top blast nozzle and described inert gas feedway, be connected with top blast duct set.
5. a kind of drying equipment according to claim 4, it is characterized in that, described top blast duct set comprises a collection wind house steward and many collection wind are in charge of, describedly collect the centre that wind house steward projection is vertically positioned at described bed body, many collection wind is in charge of the both sides being arranged at described collection wind house steward equably, and every bar collection wind is in charge of and is provided with multiple described top blast nozzle.
6. a kind of drying equipment according to claim 5, is characterized in that, multiple described bottom blowing nozzle is many and is linearly arranged in described bed body bottom equably, describedly collects the bottom blowing nozzle that wind is in charge of projection on described bed body and linear array and is parallel to each other.
7. a kind of drying equipment according to claim 1, it is characterized in that, described Multi-channel microwave drying device comprises to be carried the material-conveying belt of described predrying material and is arranged in described Multi-channel microwave drying device for carrying out the microwave dryer of microwave drying treatment to described predrying material.
8. a kind of drying equipment according to claim 7, it is characterized in that, described microwave dryer comprises waveguide arm, waveguide house steward and the multiple microwave generators be positioned at above described material-conveying belt, wherein each described microwave generator comprises and is positioned at upper waveguide cover above described material-conveying belt and is positioned at lower waveguide cover for receive repercussions corresponding with described upper waveguide cover below described material-conveying belt, each described lower waveguide cover is all connected with described waveguide arm, described waveguide arm is connected with described waveguide house steward for the waste heat received in multiple described lower waveguide cover is collected to described waveguide house steward.
9. a kind of drying equipment according to claim 1, it is characterized in that, described Multi-channel microwave drying device comprises material-conveying belt and microwave dryer, multiple microwave generators that described microwave dryer comprises waveguide arm, waveguide house steward and is positioned at above described material-conveying belt, wherein each described microwave generator comprises and is positioned at upper waveguide cover above described material-conveying belt and is positioned at lower waveguide cover for receive repercussions corresponding with described upper waveguide cover below described material-conveying belt, and each described lower waveguide cover is all connected with described waveguide arm;
Described waste heat recovery EGR comprises thermoconverter, and described waveguide house steward is connected by pipeline with waste heat recovery EGR,
Described waveguide arm is connected for the waste heat received in multiple described lower waveguide cover is collected to described waveguide house steward with described waveguide house steward, again by Water transport extremely described thermoconverter, be passed to described inert gas feedway after converting described waste heat to hot blast via described thermoconverter and recycle.
10. a kind of drying equipment according to claim 2, is characterized in that, the condenser that described tail gas recycle EGR comprises dust arrester and is connected with described dust arrester,
Described vibratory fluidized drying device is provided with the vibratory fluidized drying device blast pipe be connected with described dust arrester, described Multi-channel microwave drying device is provided with the Multi-channel microwave drying device blast pipe be connected with described dust arrester.
11. a kind of drying equipments according to claim 10, it is characterized in that, the tail gas produced in described vibratory fluidized drying device in turn through described vibratory fluidized drying device blast pipe, enter control of dust in described dust arrester, enter after described condenser dewaters, be passed to described inert gas feedway and recycle;
The tail gas produced in described Multi-channel microwave drying device in turn through described Multi-channel microwave drying device blast pipe, enter control of dust in described dust arrester, enter after described condenser dewaters, be passed to described inert gas feedway and recycle.
12. a kind of drying equipments according to claim 1, is characterized in that, the pipeline be connected are provided with the gauge tap for controlling inert gas flow between described inert gas feedway with described Multi-channel microwave drying device.
13. a kind of drying equipments according to claim 1, is characterized in that, remain on less than 90 DEG C in described Multi-channel microwave drying device by the temperature of the withering described predrying material of microwave.
14. a kind of drying equipments according to claim 1, is characterized in that, the inert gas produced in described inert gas feedway comprises nitrogen and carbon dioxide.
15. a kind of drying equipments according to claim 1, is characterized in that, described wet stock supply valve, described predrying material dump valve and described finished product dried material dump valve are star-shape feeding valve.
16., according to a kind of drying equipment in claim 1-15 described in any one claim, is characterized in that, in described inert gas feedway, oxygen concentration is no more than 8%.
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