CN101352637B - Method and device for processing explosion exhaust air - Google Patents
Method and device for processing explosion exhaust air Download PDFInfo
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- CN101352637B CN101352637B CN2008101662206A CN200810166220A CN101352637B CN 101352637 B CN101352637 B CN 101352637B CN 2008101662206 A CN2008101662206 A CN 2008101662206A CN 200810166220 A CN200810166220 A CN 200810166220A CN 101352637 B CN101352637 B CN 101352637B
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Abstract
The invention provides a disposal method and a device used for disposing explosion waste gas, consisting of a separator, a high-efficiency filter, a molecular sieve drier, a NOx adsorbing device, a NOx reducer, a burner, a deodorizer, a circulation fan, an electric heater, etc. The disposal method of the invention comprises the steps as follows: a: waste gas disposal process: the explosion waste gas is disposed by a cyclone filter, the high-efficiency filter, a molecular sieve dehydrator, the NOx adsorbing device and the deodorizer, burned by entering the burner and is exhausted; b: system inerting process: the air feeding of the waste gas disposal device is cut off, nitrogen is filled into the system so as to lead the oxygen content to be less than 2%; c: desorption and reducing process:the circulation fan is started; gas circulation between the circulation fan, the gas electric heater, the NOx reducer and the NOx adsorbing device is established, the reducing gas is filled into the system, the gas electric heater is started, the temperature of the circulation gas is gradually increased, the NOx is de-adsorbed and reduced as N2. After continuous running, the content of the NOx achieves the exhaust standard requirement.
Description
Technical field
The present invention relates to a kind of processing method and device of explosion exhaust air, be specifically related to a kind of explosion test and produce treatment of waste gas method and device.
Background technology
Based on the purpose of civilian and military industry, often need carry out explosion test, produce a lot of waste gas after the explosion test, wherein contain various to environment and ecological harmful or fire hazard material, as heavy metal aerosol, NOx, CO, H
2, CO
2, CH
4Deng (wherein NOx is more difficult), these explosion products directly were discharged in the atmosphere in the past, environment is produced harm, may and enter in the human foods circulation and accumulation by plant absorbing as the heavy metal in the heavy metal aerosol, and then to human healthy generation injury on every side, NOx accumulates in atmosphere and produces acid rain (mist) etc., and explosion product has peculiar smell in addition, therefore, explosion product must be handled.Yet explosion exhaust air has very different characteristics with other NOx waste gas, methods such as the maturation method of existing processing NOx waste gas such as alkali lye absorption, catalytic reduction, plasma technique, all can not be directly used in the processing of explosion product, produce a large amount of salkali waste (salt) solution as alkali absorption method, and salt product potentially unstable, be easy to cause secondary pollution or pollutant to shift, alkali absorption method can not be removed the H in the explosion product
2, CO, CH
4Deng combustible, especially a large amount of salkali waste (salt) liquid of alkali absorption generation is very big burden for the mechanism that carries out explosion test research, can not be accepted by it; Ripe catalytic reduction method is to add reducibility gas such as NH in waste gas
3, component such as urea, under the effect of catalyst, NOx is reduced to N
2But existing catalytic reduction method can't directly apply to the processing of explosion exhaust air, because intermittently operated is adopted in explosion test, it is also very big that the composition of every kind of explosion exhaust air differs, nuisance content altered a great deal in time when more adverse factors was the explosive container gas displacement, also there is strict demand in explosion test research institution to the exhaust-gas treatment time, therefore carrying out the catalytic reduction design by initial concentration will cause equipment huge, to relevant reducing gases facility, power load requires all very high, contain higher concentration oxygen in addition in the explosion product, if proportioning is improper, the catalytic reduction process has explosion danger, last NH
3The class reducing agent has the intense stimulus smell, can not be accepted by the Construction Party, and the existing catalytic reduction technology of therefore simple imitation is not suitable for the processing of explosion exhaust air.The higher conceptual phases that also are in of power consumption such as other method such as plasma technique do not reach the practical requirement that explosion exhaust air is handled as yet.
Purpose of the present invention is exactly a kind of method and device that is suitable for the explosion exhaust air processing of design.
Summary of the invention
The present invention has designed following processing method according to the characteristics of explosion test and explosion exhaust air, with reference to the accompanying drawings, the explosion exhaust air treating apparatus comprises equipment such as cyclone separator, high efficiency particulate air filter, mole sieve drier, NOx absorber, NOx reductor, burner, deodorizer, circulating fan, electric heater, and whole explosion exhaust air processing procedure comprises exhaust-gas treatment (absorption) process, system's inerting process, desorption reduction process and waste gas burning process:
A. waste gas treatment process:
Explosion exhaust air 1 at first advances cyclone filter 3, removes big granular substance such as wood chip, paper scrap etc. that the blast back produces; Advance high efficiency particulate air filter 4 then, remove the heavy metal ion in the explosion product aerosol; Enter molecular sieve dehydrator 5 dehydrations (steam) again; Then enter NOx absorber 6 NOx adsorption; Absorption back gas enters deodorizer 9 deodorizations; Gas after the deodorization enters burner 13, and the gas 14 after the burning reaches discharge standard, drains into atmosphere through blast pipe again.This process can adapt to the big flow in the explosion exhaust air processing procedure, the characteristics that harmful substance NOx concentration constantly changes directly corresponding to the explosive container exhaust-gas treatment.
B. system's inerting process
After explosion exhaust air disposes, cut off emission-control equipment air inlet 1, inflated with nitrogen 2 in system, make in the system oxygen content less than 2%;
C. desorption, reduction process:
Open circulating fan 11, set up gas circulation at circulating fan 11, electric gas heater 7, NOx reductor 8,6 of NOx absorbers; In system, charge into reducing gas 10 (content is less than 5%); Open electric gas heater 7, recyclegas progressively heats up, and the recyclegas temperature finally is controlled at 500 ° below the C.NOx is by desorption and be reduced to N in this process
2
Continuous service is after a period of time, and NOx content reaches the discharge standard requirement.
D. reducing gas combustion process
Slowly open air bleeding valve, open burner simultaneously, recyclegas begins pressure release and enters burner 13, makes the reducing gas burning, and the gas 14 after the burning reaches discharge standard, drains into atmosphere through blast pipe again.
Description of drawings:
Accompanying drawing is a process flow diagram of the present invention.Among the figure:
1. explosion exhaust air 2. nitrogen 3. cyclone separators 4. high efficiency particulate air filters 5. mole sieve driers
6.NOx absorber 7. electric heater 8.NOx reductors 9. activated carbon deodorization devices 10. reducing gases
11. circulating fan 12. reducing gases (burning is used) 13. burners, 14. emptyings
Characteristics of the present invention are:
(1) method of employing intermittently operated, the processing procedure of explosion exhaust air can not influence the explosion test device and carry out new experiment.The harmful substance that is about in the explosion exhaust air at first is adsorbed on the sorbing material, and the waste gas in the explosion test device can be got rid of rapidly, does not influence explosion test next time.The NOx that is adsorbed on the adsorbent adopts reducing gas that its desorption is got off, and with catalyst it is reduced to N then
2The catalytic reduction process of NOx does not influence explosion test.
(2) adsorption process and catalytic reduction process are separated, prevented that effectively oxygen mixes with the direct of reducing gases in the treating apparatus, prevented the possibility of explosion danger, reduced the consumption of reducing agent simultaneously.
(3) catalytic reduction process and desorption process coupling has reduced the reducing agent loadings easily.
(4) lower to the catalytic reduction efficiency requirement, can adopt more cheap catalyst, and not influence the harmful substance removal effect.
(5) the catalytic reduction process is controlled easily.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
Example of the present invention is an example with certain explosion test device exhaust-gas treatment.This explosion test device carries out the explosion test afterproduct for containing a small amount of heavy metal particles and NO, NO
2Deng the mist of harmful substance.Table one is the composition of gas in the explosion test after-explosion device.
At first carry out the processing of waste gas treatment process:
Explosion exhaust air 1 advances cyclone filter 3, removes big granular substance such as wood chip, paper scrap etc. that the blast back produces; Advance high efficiency particulate air filter 4 then, remove the heavy metal ion in the explosion product aerosol; Enter molecular sieve dehydrator 5 dehydrations again; Then enter NOx absorber 6 NOx adsorption; Absorption back gas enters deodorizer deodorization 9; Gas after the deodorization enters burner 13, and table two reaches discharge standard for the composition of the gas 14 after burning, and drains into atmosphere through blast pipe again.NOx removes CO, H after being adsorbed agent absorption in this process
2, CH
4Deng composition in burner by after-flame.
Table one, explosion exhaust air are formed (behind the mole sieve drier)
Annotate: X comprises minor amount of water steam and other components
The composition of (before the burner) after table two, the waste gas process adsorption treatment
Annotate: X comprises minor amount of water steam and other components
After repeatedly testing, the capacity of adsorbent reaches capacity, and then carries out desorption, reduction processing.Cut off the emission-control equipment air inlet, inflated with nitrogen 2 in system, finally make in the system oxygen content less than 2%; Open circulating fan 11 again, set up gas circulation at circulating fan 11, electric gas heater 7, NOx reductor 8,6 of NOx absorbers; In system, charge into reducing gas 10 (C
3H
6, content is less than 5%); Open electric gas heater 7, recyclegas progressively heats up, and the recyclegas temperature finally is controlled at 500 ° below the C.NOx is by desorption and be reduced to N in this process
2
Table three, the waste gas pollutant load (floss hole) behind burner
Annotate: only provide corresponding control index behind the burner.
Table four is that continuous service is after 3 hours, the composition of circulating air, NOx content reaches the discharge standard requirement, slowly open air bleeding valve, open burner simultaneously, recyclegas begins pressure release and enters burner 13, makes the reducing gas burning, gas 14 after the circulating air burning reaches discharge standard, drains into atmosphere through blast pipe again.
Table five has reached the requirement of discharging standards for the composition of circulating air burning back gas.
The composition of table four, 3 hours circulating air of continuous service
Pollutant load after table five, the circulating air burning
Annotate: only provide corresponding control index behind the burner.
Claims (8)
1. the processing method of explosion exhaust air, mainly finish by the explosion exhaust air treating apparatus, this device comprises cyclone filter, high efficiency particulate air filter, mole sieve drier, NOx absorber, NOx reductor, burner, deodorizer, circulating fan, electric gas heater, it is characterized in that described method may further comprise the steps:
A, waste gas treatment process:
Explosion exhaust air advances cyclone filter, high efficiency particulate air filter, mole sieve drier, NOx absorber successively;
NOx absorption back gas enters deodorizer, and the gas after the deodorization enters burner combustion after emission by exhaust pipe;
B, system's inerting process:
After explosion exhaust air disposes, cut off the emission-control equipment air inlet, inflated with nitrogen in system makes in the system oxygen content less than 2%;
C, desorption, reduction process:
Open circulating fan, set up gas circulation between circulating fan, electric gas heater, NOx reductor, NOx absorber, charge into reducing gas again in system, open electric gas heater, recyclegas progressively heats up, and NOx is by desorption and be reduced to N
2
D, reducing gas combustion process:
Desorption, reduction back gas through the burner afterburnt through emission by exhaust pipe.
2. processing method according to claim 1 is characterized in that, adopts high efficiency particulate air filter before the adsorption process, is used for removing the heavy metal aerosol of waste gas.
3. processing method according to claim 1 is characterized in that, adopts mole sieve drier before the adsorption process, is used for removing waste gas steam.
4. processing method according to claim 1 is characterized in that, the employing burner is removed the inflammable substance in the waste gas.
5. processing method according to claim 4 is characterized in that, described inflammable substance is H
2, CO, CH
4
6. processing method according to claim 1 is characterized in that, system is before desorption, reduction, and system's inflated with nitrogen is replaced protection.
7. processing method according to claim 1 is characterized in that desorption is reduced to cyclic process, and is temperature programming and thermostatic process.
8. processing method according to claim 1 is characterized in that, reducing gas is intermittently to add.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101662206A CN101352637B (en) | 2008-09-21 | 2008-09-21 | Method and device for processing explosion exhaust air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101662206A CN101352637B (en) | 2008-09-21 | 2008-09-21 | Method and device for processing explosion exhaust air |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101352637A CN101352637A (en) | 2009-01-28 |
| CN101352637B true CN101352637B (en) | 2011-08-17 |
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ID=40305807
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101662206A Expired - Fee Related CN101352637B (en) | 2008-09-21 | 2008-09-21 | Method and device for processing explosion exhaust air |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105944468A (en) * | 2016-05-31 | 2016-09-21 | 徐秀 | Filtering mechanism of air purifying device |
| CN111249854A (en) * | 2020-02-20 | 2020-06-09 | 中国科学院过程工程研究所 | High-humidity industrial waste gas purification device and method |
-
2008
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