CN102338391A - Method for treating asphalt flue gas by microwave incineration method - Google Patents
Method for treating asphalt flue gas by microwave incineration method Download PDFInfo
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- CN102338391A CN102338391A CN2011103069077A CN201110306907A CN102338391A CN 102338391 A CN102338391 A CN 102338391A CN 2011103069077 A CN2011103069077 A CN 2011103069077A CN 201110306907 A CN201110306907 A CN 201110306907A CN 102338391 A CN102338391 A CN 102338391A
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- Prior art keywords
- flue gas
- microwave
- bitumen flue
- silicon carbide
- carbide rod
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000010426 asphalt Substances 0.000 title claims abstract description 50
- 239000003546 flue gas Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 50
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 10
- 238000000746 purification Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 10
- 239000003245 coal Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000002798 spectrophotometry method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 239000002156 adsorbate Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241000272173 Calidris Species 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention provides a method for treating asphalt flue gas by a microwave incineration method. The method comprises the following steps of: heating a silicon carbide rod serving as a wave-absorbing medium under microwaves; and introducing a mixture of preheated asphalt flue gas and air into the microwaves, incinerating the mixture with the pretreated silicon carbide rod, and discharging the incinerated asphalt tail gas directly. In the method, the asphalt flue gas is purified by the microwave incineration method, the purification efficiency of the asphalt flue gas is over 95 percent, and the method is wide in applicable concentration range, high in adaptability and treatment efficiency and good in effect; and the method has the characteristics that equipment is simple, the method is easy to implement, operate and control, the resistance of a system is low, secondary pollution is avoided, and the like.
Description
Technical field
The present invention relates to a kind of bitumen flue gas processing method, be specifically related to a kind of method that adopts the microwave burning method to handle bitumen flue gas, belong to environmental protection technical field.
Background technology
Research at present both at home and abroad shows that the migration of harmful constituent mainly contains three kinds of modes in the pitch: first kind is that volatile component in the pitch is moved in the air with the form of smog; Second kind be pitch in the use on road surface, some components in the pitch might along with rainwater and migration is advanced in soil or the water source; The third is in the road use, and the asphalt component that wears and tears is moved in the soil through deposition, absorption.And for commercial production; The propagation of pitch harmful substance mainly is first kind of air borne; For example the carbon product prebaked anode just has a large amount of glance coals and discharges, if can not be up to standard to the processing of glance coal in the roasting process of roaster in metallurgical industry; Influence to environmental protection is very serious, and this is both at home and abroad not stint the cause place of colored huge investment for the environmental protection of administering electrolytic aluminium industry.
Both at home and abroad to the processing commercial run of bitumen flue gas, mainly contain electric fishing method, absorption method, burning method, absorption process etc. for now.The electric fishing method mainly is temperature to be remained on 80 to 90 degrees centigrade bitumen flue gas handle, and lets bitumen flue gas get into electrical tar precipitator, and flue gas particle is charged in trap, collect, purify, and under the effect of air-introduced machine, goes into atmosphere at the chimney high altitude discharge then; But wet type electric fishing device has increased the secondary pollution that sewage disposal brings.Absorption method mainly is one or more components in the fluid mixture to be gathered or condensing on the surface with porosu solid; Reach the operation that separates purpose; According to active force between adsorbent surface and the adsorbate is exactly to be called " Van der Waals force " by what intermolecular attraction caused; Chemical reaction does not take place between adsorbent and the adsorbate, does not receive Influence of Temperature.Adsorbate for glance coal mainly is to adopt active carbon, coke powder, dolomite dust etc.; This method technology is simple, and purification efficiency is high, small investment, and operating cost is low, but SR is bigger.Burning method mainly is in the environment more than 700 ℃, utilize to contain the great number of flammable organic matter in the bitumen flue gas, but contact completing combustion with air, but burning method is handled energy consumption under this low concentration pitch too high, and expense is high and uneconomical.Absorption process is commonly called as washing method, is a kind of common used in industry exhaust gas treatment method; It is to utilize each blending ingredients different solubility in selected absorbent in the waste gas, and perhaps active component reacts in certain component and the absorbent, reaches a kind of method of purifying exhaust air.The absorption cleaning method is applied to bitumen flue gas and administers, and exactly gaseous contaminant in the flue gas (being actually the tar mist grain of 0.1～1.0m) is transferred to liquid phase (absorbent), thereby reaches the purpose of flue; This method equipment is simple, easy to maintenance, and SR is little, and energy consumption is low, but inflammable, and purification efficiency is not high, also is difficult for adopting.
Bitumen flue gas is administered does not still have ripe technology; More than this several method all exist some drawbacks that exist in the commercial production, much all be because gas collecting efficiency low, complex process; Reasons such as Operation and Maintenance is loaded down with trivial details, SR is big all can not be stablized long-time running and abandon at last.
Summary of the invention
The object of the present invention is to provide that a kind of treatment effect is better, the efficiency of heating surface is high, easy operating, be easy to control, the method for SR is little, operating cost is lower and simple in structure burning asphalt flue gas purifying, solve some drawbacks in the actual production.
The present invention realizes through following technical proposal: a kind of method that adopts the microwave burning method to handle bitumen flue gas, and following each step of process:
A. will inhaling ripple medium silicon carbide rod, to place frequency be under the 2450MHz microwave, heat with the heating rate of 5 ℃/min, and when temperature rises to 850～1000 ℃, insulation 10min;
B. the concentration with bitumen flue gas accounts for 300～1500mg/m
3, temperature is 130～150 ℃ bitumen flue gas and AIR MIXTURES; Being passed into frequency with the flow velocity of 1L/min is that 2450MHz, pressure are under the microwave of 47.34～101.28KPa; Burn 0.5～1s with steps A gained silicon carbide rod, the pitch exhaust emissions after directly will burning then.
Advantage of the present invention and good effect are following:
Because adopt technique scheme, the present invention burns bitumen flue gas, makes bitumen flue gas in the high-temperature incinerator hall, can fully burn, not only efficiency of combustion is high, and greatly reduces bitumen flue gas and be discharged into the influence that in the air environment is caused.The concentration that detects bitumen flue gas through test all is not more than 50mg/m
3, BaP content is 346ng/m
3, through the microwave burning disposal time greater than 0.5 second, the content of bitumen flue gas and BaP reaches discharging standards basically.
Adopt the method for microwave treatment bitumen flue gas, not only effect is fine, with other compared with techniques; It is high that the present invention also has heating using microwave efficient; Easy operating is easy to control, advantage such as SR is little, operating cost is low, and has solved some drawbacks in the actual production.Especially high, the problems such as resistance wire is easily broken, intensification is slow, cooling is slow, energy consumption height of burning imflammable gas cost that occur in the existing burning method can be able to solve in microwave burning disposal bitumen flue gas:
1, the purification efficiency to bitumen flue gas can reach more than 95%, and the concentration range wide adaptability that is suitable for is strong;
2, selecting for use the microwave burning method to handle pitch tail gas can raise the efficiency, and equipment is simple, SR is little, easy operating;
3, select for use air to compare with traditional burning method as the carrier gas of burning pitch tail gas: present stage burning method basically all be to select the natural gas burning method for use; Best proportioning is at 2.3 ︰ 1 (Tian Ran Qi ︰ bitumen flue gas); Cause the extensive application of non-renewable resources natural gas; Not only cost is higher, and energy consumption is bigger;
4, select for use silicon carbide rod as the suction ripple medium that burns bitumen flue gas, not only the suction ripple of silicon carbide rod heats up stability better, the more important thing is that silicon carbide rod is difficult for taking place chemical reaction at high temperature and bitumen flue gas.
The specific embodiment
To combine embodiment further to illustrate content of the present invention below, but these instances do not limit protection scope of the present invention.
Embodiment 1
A. will inhaling ripple medium silicon carbide rod, to place frequency be under the 2450MHz microwave, heat with the heating rate of 5 ℃/min, and when temperature rises to 850 ℃, insulation 10min;
B. the concentration with bitumen flue gas accounts for 793.1mg/m
3, temperature is 140 ℃ bitumen flue gas and AIR MIXTURES; Being passed into frequency with the flow velocity of 1L/min is that 2450MHz, pressure are under the microwave of 47.34KPa; Burn 1s with steps A gained silicon carbide rod, the pitch exhaust emissions after directly will burning then.
Adopt the method for being recommended in the ultraviolet spectrophotometry method of glance coal,, as absorption liquid bitumen flue gas is detected with benzene: the concentration of gas outlet bitumen flue gas is 1.8 mg/m
3, purification efficiency reaches 99.7%.
Embodiment 2
A. will inhaling ripple medium silicon carbide rod, to place frequency be under the 2450MHz microwave, heat with the heating rate of 5 ℃/min, and when temperature rises to 900 ℃, insulation 10min;
B. the concentration with bitumen flue gas accounts for 300mg/m
3, temperature is 130 ℃ bitumen flue gas and AIR MIXTURES; Being passed into frequency with the flow velocity of 1L/min is that 2450MHz, pressure are under the microwave of 81.47KPa; Burn 0.5s with steps A gained silicon carbide rod, the pitch exhaust emissions after directly will burning then.
Adopt the method for being recommended in the ultraviolet spectrophotometry method of glance coal,, as absorption liquid bitumen flue gas is detected with benzene: the concentration of gas outlet bitumen flue gas is 16.1 mg/m
3, purification efficiency reaches 94.6%.
Embodiment 3
A. will inhaling ripple medium silicon carbide rod, to place frequency be under the 2450MHz microwave, heat with the heating rate of 5 ℃/min, and when temperature rises to 1000 ℃, insulation 10min;
B. the concentration with bitumen flue gas accounts for 1500mg/m
3, temperature is 150 ℃ bitumen flue gas and AIR MIXTURES; Being passed into frequency with the flow velocity of 1L/min is that 2450MHz, pressure are under the microwave of 101.28KPa; Burn 1s with steps A gained silicon carbide rod, the pitch exhaust emissions after directly will burning then.
Adopt the method for being recommended in the ultraviolet spectrophotometry method of glance coal,, as absorption liquid bitumen flue gas is detected with benzene: the concentration of gas outlet bitumen flue gas is 45 mg/m
3, purification efficiency reaches 97%.
Embodiment 4
A. will inhaling ripple medium silicon carbide rod, to place frequency be under the 2450MHz microwave, heat with the heating rate of 5 ℃/min, and when temperature rises to 950 ℃, insulation 10min;
B. the concentration with bitumen flue gas accounts for 1064mg/m
3, temperature is 135 ℃ bitumen flue gas and AIR MIXTURES; Being passed into frequency with the flow velocity of 1L/min is that 2450MHz, pressure are under the microwave of 68.24KPa; Burn 0.5s with steps A gained silicon carbide rod, the pitch exhaust emissions after directly will burning then.
Adopt the method for being recommended in the ultraviolet spectrophotometry method of glance coal,, as absorption liquid bitumen flue gas is detected with benzene: the concentration of gas outlet bitumen flue gas is 6.2 mg/m
3, purification efficiency reaches 99.4%.
Claims (1)
1. method that adopts the microwave burning method to handle bitumen flue gas is characterized in that through following each step:
A. will inhaling ripple medium silicon carbide rod, to place frequency be under the 2450MHz microwave, heat with the heating rate of 5 ℃/min, and when temperature rises to 850～1000 ℃, insulation 10min;
B. the concentration with bitumen flue gas accounts for 300～1500mg/m
3, temperature is 130～150 ℃ bitumen flue gas and AIR MIXTURES; Being passed into frequency with the flow velocity of 1L/min is that 2450MHz, pressure are under the microwave of 47.34～101.28KPa; Burn 0.5～1s with steps A gained silicon carbide rod, the pitch exhaust emissions after directly will burning then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103069077A CN102338391A (en) | 2011-10-12 | 2011-10-12 | Method for treating asphalt flue gas by microwave incineration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103069077A CN102338391A (en) | 2011-10-12 | 2011-10-12 | Method for treating asphalt flue gas by microwave incineration method |
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| Publication Number | Publication Date |
|---|---|
| CN102338391A true CN102338391A (en) | 2012-02-01 |
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| CN2011103069077A Pending CN102338391A (en) | 2011-10-12 | 2011-10-12 | Method for treating asphalt flue gas by microwave incineration method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006666A (en) * | 2017-10-26 | 2018-05-08 | 昆明理工大学 | A kind of processing method of organic exhaust gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4813231A (en) * | 1987-10-07 | 1989-03-21 | Southwest Research Institute | Engine exhaust after-treatment device |
| JPH06248935A (en) * | 1993-02-19 | 1994-09-06 | Matsushita Electric Ind Co Ltd | High-frequency heating element having catalytic function |
| US5764850A (en) * | 1996-04-04 | 1998-06-09 | Phoenix Solutions Co. | Silicon carbide foam electric heater for heating gas directed therethrough |
-
2011
- 2011-10-12 CN CN2011103069077A patent/CN102338391A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4813231A (en) * | 1987-10-07 | 1989-03-21 | Southwest Research Institute | Engine exhaust after-treatment device |
| JPH06248935A (en) * | 1993-02-19 | 1994-09-06 | Matsushita Electric Ind Co Ltd | High-frequency heating element having catalytic function |
| US5764850A (en) * | 1996-04-04 | 1998-06-09 | Phoenix Solutions Co. | Silicon carbide foam electric heater for heating gas directed therethrough |
Non-Patent Citations (1)
| Title |
|---|
| 周俊文等: "微波净化处理低浓度沥青烟气", 《昆明理工大学学报（自然科学版）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006666A (en) * | 2017-10-26 | 2018-05-08 | 昆明理工大学 | A kind of processing method of organic exhaust gas |
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Application publication date: 20120201 |