CN103047662A - Catalytic combustion treatment device and treatment method for organic waste gases - Google Patents
Catalytic combustion treatment device and treatment method for organic waste gases Download PDFInfo
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- CN103047662A CN103047662A CN201110313311XA CN201110313311A CN103047662A CN 103047662 A CN103047662 A CN 103047662A CN 201110313311X A CN201110313311X A CN 201110313311XA CN 201110313311 A CN201110313311 A CN 201110313311A CN 103047662 A CN103047662 A CN 103047662A
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Abstract
The invention relates to a catalytic combustion treatment device and treatment method for organic waste gases. At least two serially connected catalyst bed layers are provided, each bed layer is connected to a main exhaust pipeline through an exhaust pipeline, and a waste gas on-line analysis device is arranged on the main exhaust pipeline and automatically monitors the target gas concentration on the main exhaust pipeline. When the target gas concentration monitoring value is lower than a set value, only one catalyst bed layer participates in the catalytic combustion reaction through a control regulating valve in the system; and when the target gas concentration monitoring value exceeds the set value, the two catalyst bed layers participate in the catalytic combustion reaction simultaneously through the control regulating valve in the system. Therefore, the device is particularly suitable for stable standard treatment for organic waste gases with large target gas concentration fluctuation, simultaneously, the service life of catalysts can be maximized, and operating costs can be saved maximally.
Description
Technical field
The invention provides a kind of organic waste gas catalytic combustion treating apparatus and processing method, belong to environmental technology field, the stably reaching standard that is specially adapted to the organic exhaust gas that the object gas fluctuation of concentration is large in exhausted air quantity and the waste gas is processed.
Background technology
Various industrial production; all produce the waste gas that contains in a large number poisonous harmful substance such as industries such as operplate printing, insulating materials, enamel-covered wire, coking, paint and chemical industry; in addition; industry or sanitary sewage disposal field are owing to be subject to physics, chemistry or the effect of the factor such as biological; waste water also usually volatilizes a large amount of organic exhaust gas in processing procedure; especially Wastewater Pretreatment facility such as homogeneous pond, Buffer Pool, floation tank, oil interceptor and acidification pool etc., the poisonous and harmful substance concentration that volatilizes is higher.These poisonous and harmful substances comprise volatile phenol, benzene homologues, sulfide, organic amine etc., and serious environment pollution works the mischief to sewage-farm operating personnel's physical and mental health simultaneously.For this waste gas that contains the higher concentration organic substance, present processing method mostly is flame combustion, catalytic combustion, heat-accumulation combustion or heat-storage catalytic burning etc.Because the organic matter content itself in the waste gas is not enough to finish combustion process, so after needing auxiliary fuel that gas temperature is risen to uniform temperature, passes into waste gas again organic substance is wherein decomposed, finish innoxious process, this is flame combustion.Catalytic combustion and Regenerative Combustion Technology all are provided with the reaction heat recvery facility, and these two kinds of technology are the more widely technology of using at present.The heat-storage catalytic burning is the combination of catalytic combustion and two kinds of technology of heat-accumulation combustion.
CN2590648Y provides a kind of catalytic combustion system for organic waste-gas purification, this device is made of housing, airscoop shroud, exhaust outlet, double-deck tab style heat exchanger, some groups of electrothermal tubes and some layers of Catalytic Layer, wherein electrothermal tube and Catalytic Layer compound, be crisscross arranged, thereby exhausted air quantity and exhaust gas concentration changed stronger adaptive capacity is arranged, but structure is complicated, and manufacturing processing is cumbersome; The described catalytic combustion system of CN201043752Y partly is comprised of electric heating tube, air mixer, high activated catalyst reaction zone and assurance reaction zone etc., high activated catalyst reaction zone and guarantee that reaction zone is provided with catalyst wherein, by two reaction zones are set, can guarantee the stably reaching standard discharging of waste gas when the poisonous and harmful substance fluctuation of concentration is more violent in or the waste gas large in the exhausted air quantity fluctuation.The foul waste gas of each link discharging of the enterprises such as patent CN101062463A will refine oil, chemical industry is divided into high VOC concentration waste gas and low VOC concentration waste gas by VOC concentration, and processes respectively.Although this technology can finally realize the harmless treatment of waste gas, concentrated for making low concentration gas, reach the requirement of catalytic combustion system inlet gas concentration, be provided with adsorbent equipment, thereby can increase investment cost, also make technological process more complicated.
More than also there is a shortcoming in device: catalyst for catalytic combustion active ingredient generally all is noble metal, such as platinum, palladium etc., and hot environment can affect the service life of catalyst, and when catalytic combustion system designs, need to design according to the exhaust gas flow of maximum, to guarantee reaching required clean-up effect when the maximum exhaust flow.Therefore the organic substance concentration long period is in reduced levels in waste gas, when perhaps the exhausted air quantity long period is in than low discharge, even only have partially catalyzed agent bed to participate in the catalyst combustion reaction (having reached clean-up effect) of waste gas, reacted high temperature purification gas also can be by all having neither part nor lot in the beds of catalyst combustion reaction, thereby shorten catalyst service life.
Summary of the invention
Deficiency for existing catalytic combustion system the invention provides a kind of catalytic combustion device for organic waste gases and waste gas processing method, and apparatus of the present invention and method be the service life of extending catalyst effectively.
Organic waste gas catalytic combustion treating apparatus of the present invention, comprise at least two sections beds that are communicated with successively, every section beds outlet except latter end beds, and between the latter end beds outlet main exhaust pipeline by-pass line is set, valve all is set on each by-pass line, is arranged on the organic concentration that gas is finally discharged in the line analysis Equipment Inspection.
In the organic waste gas catalytic combustion treating apparatus of the present invention, beds can arrange 2～5 sections as required, and 2 sections of operated by rotary motion get final product, and beds is for being connected in series.The catalyst amount of every section beds can be identical, also can be different.
In the organic waste gas catalytic combustion treating apparatus of the present invention, according to the testing result of on-line analysis equipment, can adopt manual control by-pass line valve, make final discharging waste gas concentration meet discharge index.
In the organic waste gas catalytic combustion treating apparatus of the present invention, testing result according to on-line analysis equipment, automatic control system can be set, on-line analysis equipment is connected with electric connection mode with automatic control system, and automatic control system is the common controller in this area, compares according to the controlled concentration of the organic concentration that detects and setting, when actual discharge concentration is higher than controlled concentration, close the by-pass line valve, make waste gas pass through more beds, improve the clean-up effect of waste gas.The formation of above-mentioned automatic control system and structure are technology contents well known to those skilled in the art.On-line analysis equipment can be selected the total hydrocarbon monitor.
Organic waste gas catalytic combustion processing method of the present invention is used the above-mentioned organic waste gas catalytic combustion treating apparatus of the present invention.Organic exhaust gas can be the organic exhaust gas that various processes produce, and organic concentration is generally 2000～10000 mg/m
3In the interior any range.
In the inventive method, use catalyst for catalytic combustion in the catalytic combustion reactor, the reaction condition of catalytic combustion and catalyst for catalytic combustion can be determined by this area general knowledge.Be generally such as the catalyst combustion reaction condition: 200 ~ 400 ℃ of reactor inlet temperatures, gas volume air speed (calculating under the standard state) is 6000 ~ 100000h
-1Catalyst for catalytic combustion can be selected commercially available conventional products, such as cellular or graininess noble metal catalyst, cellular or graininess non-precious metal catalyst etc., the active component of catalyst is noble metal platinum, palladium, or in base metal manganese, copper, chromium, cerium, lanthanum, vanadium etc. one or more.
In the inventive method, if the flow of organic exhaust gas reduces or concentration reduces, can use the catalyst for catalytic combustion bed of lesser amt; Otherwise, then use the catalyst for catalytic combustion bed of a greater number.
Apparatus of the present invention and method can adapt to the tolerance fluctuation or the larger organic waste-gas purification of fluctuation of concentration is processed, when less or concentration is low in tolerance, use partially catalyzed combustion catalyst bed, namely can reach clean-up effect, this moment, follow-up catalytic bed can be left unused, and had avoided the deficiency that the life-span is reduced.Improve the comprehensive utilization effect of catalytic combustion system, reduced running expense.
Description of drawings:
Fig. 1 is for implementing organic waste gas catalytic combustion treating apparatus structural principle schematic diagram of the present invention, wherein:
1, air inlet pipe; 2, main exhaust; 3, beds A; 4, beds B; 5, control valve A; 6, control valve B; 7, waste gas on-line analysis equipment; 8, control system.
The specific embodiment:
Further specify the embodiment of the inventive method below in conjunction with accompanying drawing:
As shown in Figure 1, organic waste gas catalytic combustion treating apparatus of the present invention is comprised of two beds A that are connected in series and beds B, control valve A and B, control system 8, waste gas on-line analysis equipment 7 and connecting line etc.When object gas concentration in the waste gas of access to plant or process tolerance when low, because sufficient reacting, object gas concentration in the main exhaust pipeline 2 is in low-level, namely be in below the setting value, at this moment, control system is opened control valve 5, closes simultaneously control valve 6, only has beds A to participate in the catalyst combustion reaction of waste gas; When the rising of object gas concentration or exhausted air quantity increase in the admission line, because waste gas reacts insufficient in beds A, cause in the main exhaust pipeline 2 the object gas concentration value to raise and surpass setting limit value, at this moment, control system will be opened control valve B automatically, close simultaneously control valve A, beds A and beds B all participate in the catalyst combustion reaction of waste gas, to satisfy the waste gas purification processing requirements.
This device is by arranging two beds that are connected in series, can guarantee the stably reaching standard discharging of waste gas when the large or exhausted air quantity fluctuation of object gas fluctuation of concentration in the waste gas is larger, simultaneously, when lower or exhausted air quantity is low when object gas concentration in the waste gas, only have a beds to be in hot environment, and another beds has neither part nor lot in catalyst combustion reaction, and is in the lower temperature environment, thereby makes the catalyst life maximization.
Embodiment
The organic exhaust gas of the discharges such as certain sewage-farm oil interceptor, floation tank and oil-polluted water tank adopts catalytic combustion system to process.Under the normal operation, NMHC concentration 2000～5000mg/Nm in the waste gas of the discharging such as oil interceptor, floation tank and oil-polluted water tank
3, but during the large breathing of oil-polluted water tank, NMHC concentration 4000～8000mg/Nm in the mix waste gas
3Main operating condition: whole device is comprised of two-stage catalytic agent bed, and under the normal operating condition, waste gas is by a bed, during the large breathing of oil-polluted water tank, waste gas is by two-stage catalytic agent bed, and waste gas advances 350 ℃ of reaction bed temperatures, reaction velocity 8000h
-1
After treatment, NMHC concentration＜120mg/Nm in the purifying exhaust air
3
Claims (10)
1. organic waste gas catalytic combustion treating apparatus, it is characterized in that: the organic waste gas catalytic combustion treating apparatus comprises at least two sections beds that are communicated with successively, every section beds outlet except latter end beds, and between the latter end beds outlet main exhaust pipeline by-pass line is set, valve all is set on each by-pass line, is arranged on the organic concentration that gas is finally discharged in the line analysis Equipment Inspection.
2. according to device claimed in claim 1, it is characterized in that: in the organic waste gas catalytic combustion treating apparatus, beds arranges 2～5 sections.
3. according to device claimed in claim 1, it is characterized in that: adopt manually control by-pass line valve.
4. according to device claimed in claim 1, it is characterized in that: automatic control system is set, on-line analysis equipment is connected with electric connection mode with automatic control system, automatic control system compares according to the organic concentration that detects and the controlled concentration of setting, when actual discharge concentration is higher than controlled concentration, close the by-pass line valve, make waste gas pass through more beds, improve the clean-up effect of waste gas.
5. according to device claimed in claim 1, it is characterized in that: on-line analysis equipment choosing total hydrocarbon monitor.
6. an organic waste gas catalytic combustion processing method is characterized in that right to use requires the described organic waste gas catalytic combustion treating apparatus of 1 to 5 arbitrary claim.
7. it is characterized in that in accordance with the method for claim 6: organic concentration is 2000～10000 mg/m in the organic exhaust gas
3In the interior any range.
8. in accordance with the method for claim 6, it is characterized in that: use catalyst for catalytic combustion in the catalytic combustion reactor, 200 ~ 400 ℃ of catalytic combustion reactor inlet temperatures, gas volume air speed are 6000 ~ 100000h
-1
9. in accordance with the method for claim 6, it is characterized in that: catalyst for catalytic combustion uses cellular or graininess noble metal catalyst, cellular or graininess non-precious metal catalyst, the active component of catalyst is noble metal platinum, palladium, or in the base metal manganese, copper, chromium, cerium, lanthanum, vanadium one or more.
10. in accordance with the method for claim 6, it is characterized in that: the flow of organic exhaust gas reduces or concentration reduces, and uses the catalyst for catalytic combustion bed of lesser amt; Otherwise, then use the catalyst for catalytic combustion bed of a greater number.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100982A (en) * | 2014-08-06 | 2014-10-15 | 江苏句容联合铜材有限公司 | Method for processing tail gas in enameled flat wire production |
| CN107504506A (en) * | 2017-07-11 | 2017-12-22 | 福州大学 | One kind catalysis burning purification technique and its device |
| CN108619887A (en) * | 2018-05-17 | 2018-10-09 | 绍兴市鼎泰节能环保科技有限公司 | A kind of exhaust treatment system |
| CN110056894A (en) * | 2019-04-25 | 2019-07-26 | 袁华贤 | Motor dipping lacquer VOCs processing-catalytic combustion device |
| CN113209816A (en) * | 2020-01-21 | 2021-08-06 | 中国石油化工股份有限公司 | Catalyst grading method for catalytic oxidation of sulfur-containing VOCs and method for catalytic oxidation of sulfur-containing VOCs |
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| US4343769A (en) * | 1980-08-11 | 1982-08-10 | W. R. Grace & Co. | Catalytic solvent vapor incinerating apparatus |
| CN2881370Y (en) * | 2005-11-11 | 2007-03-21 | 中国国际海运集装箱(集团)股份有限公司 | Organic waste gas cleaning continuous catalytic burning system |
| CN101716462A (en) * | 2010-01-26 | 2010-06-02 | 浙江卫星丙烯酸制造有限公司 | Catalysis and oxidation method of high-concentration waste gas |
| CN201875727U (en) * | 2010-08-27 | 2011-06-22 | 王文初 | Novel three-body heat accumulating type catalytic burner |
-
2011
- 2011-10-17 CN CN201110313311XA patent/CN103047662A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4343769A (en) * | 1980-08-11 | 1982-08-10 | W. R. Grace & Co. | Catalytic solvent vapor incinerating apparatus |
| CN2881370Y (en) * | 2005-11-11 | 2007-03-21 | 中国国际海运集装箱(集团)股份有限公司 | Organic waste gas cleaning continuous catalytic burning system |
| CN101716462A (en) * | 2010-01-26 | 2010-06-02 | 浙江卫星丙烯酸制造有限公司 | Catalysis and oxidation method of high-concentration waste gas |
| CN201875727U (en) * | 2010-08-27 | 2011-06-22 | 王文初 | Novel three-body heat accumulating type catalytic burner |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100982A (en) * | 2014-08-06 | 2014-10-15 | 江苏句容联合铜材有限公司 | Method for processing tail gas in enameled flat wire production |
| CN107504506A (en) * | 2017-07-11 | 2017-12-22 | 福州大学 | One kind catalysis burning purification technique and its device |
| CN108619887A (en) * | 2018-05-17 | 2018-10-09 | 绍兴市鼎泰节能环保科技有限公司 | A kind of exhaust treatment system |
| CN110056894A (en) * | 2019-04-25 | 2019-07-26 | 袁华贤 | Motor dipping lacquer VOCs processing-catalytic combustion device |
| CN113209816A (en) * | 2020-01-21 | 2021-08-06 | 中国石油化工股份有限公司 | Catalyst grading method for catalytic oxidation of sulfur-containing VOCs and method for catalytic oxidation of sulfur-containing VOCs |
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Application publication date: 20130417 |