CN211725246U - VOCs adsorbs-catalytic combustion system - Google Patents
VOCs adsorbs-catalytic combustion system Download PDFInfo
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- CN211725246U CN211725246U CN201922488315.6U CN201922488315U CN211725246U CN 211725246 U CN211725246 U CN 211725246U CN 201922488315 U CN201922488315 U CN 201922488315U CN 211725246 U CN211725246 U CN 211725246U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model relates to a VOCs adsorbs-catalytic combustion system mainly relates to exhaust-gas treatment technical field. The system is provided with a plurality of adsorption concentration devices, catalytic combustion beds, adsorption fans, desorption fans, cold air fans and the like which can be used alternately. When one of them adsorbs the enrichment facility and adsorbs saturation and carry out the desorption, other adsorb enrichment facility and be in absorption or cooling state, through the cyclic alternate switch between a plurality of absorption enrichment facility, the system can adsorb in succession. The heat generated by the catalytic combustion bed can be used for desorbing the adsorption concentration device, so that waste energy utilization is achieved. The utility model discloses a processing system purifying rate is high, no secondary pollution, and the temperature of initiating combustion is low, heat utilization rate is high, simple process, convenient operation, is fit for the purification of the VOCs waste gas of low concentration, big amount of wind, saves more than 85% of electric energy than the catalytic combustion method at least under the same waste gas concentration and the amount of wind, and is more energy-conserving to the waste gas of small concentration.
Description
Technical Field
The utility model relates to a waste gas treatment technical field, concretely relates to VOCs adsorbs-catalytic combustion system.
Background
Volatile Organic Compounds (VOCs) in the organic waste gas are part of gaseous pollutants, and are discharged in various occasions using organic solvents, such as processing and production places of paint spraying, printing, metal oil removal and degreasing, adhesives, pharmacy, plastics, rubber, petroleum and the like. The VOCs waste gas is generally characterized by complex components, large variation in emission concentration, and difficulty in being dissolved in water, acids or alkalis, and thus is difficult to treat. The pollution of the VOCs waste gas to the environment and the harm to human beings reach the non-negligible degree, and some harm to human life.
Currently, an activated carbon adsorption method and a combustion method are widely used as conventional treatment methods for VOCs exhaust gas. The purification rate of the activated carbon adsorption method can reach more than 95 percent, the activated carbon adsorption method is suitable for VOCs waste gas with low concentration and large air volume, but the VOCs waste gas is easy to adsorb and saturate, in order to ensure the continuity of production, two adsorption beds are generally designed to be used alternately, the adsorption beds have large volume, the consumption of the adsorbent is large, the equipment is heavy and the investment is large; after the adsorption is saturated, the adsorbent is taken out for elution, and the operation is troublesome. The combustion method is suitable for treating VOCs waste gas with high concentration, small air volume and complex components, requires higher temperature of gas, and needs to consume a large amount of energy in order to increase the temperature of the waste gas. For 5000m3Large air volume above 1000mg/m3The following unstable VOCs waste gas with low concentration does not have a good treatment method, and the method is ubiquitousPoor physical effect, high energy consumption and expensive operation cost.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model discloses a system suitable for the big amount of wind, low concentration, basically not need external supplementary heat source just can high-efficient continuous processing VOCs waste gas.
In order to realize the utility model discloses a purpose, the utility model discloses a following technical scheme:
a VOCs adsorption-catalytic combustion system comprises a conveying unit, an adsorption concentration unit and a catalytic combustion unit, wherein the conveying unit comprises an air inlet pipeline and an exhaust pipeline; the adsorption concentration unit comprises an adsorption fan connected with the air inlet pipeline and a plurality of adsorption concentration devices which are respectively connected with the adsorption fan and the exhaust pipeline and are arranged in parallel; the catalytic combustion unit comprises a desorption fan connected with a plurality of adsorption concentration devices and a catalytic combustion bed connected with the desorption fan.
According to the technical scheme, the system is provided with an air compensation unit, the air compensation unit comprises an air supplement fan communicated with an adsorption concentration device pipeline, and the air compensation unit further comprises a thermocouple arranged on the pipeline between the adsorption concentration device and the air supplement fan.
According to a further technical scheme, an air outlet pipeline of the catalytic combustion bed is connected with pipelines between the supplementary cooling fan and the thermocouple.
In a further technical scheme, an adsorbent adopted by the adsorption concentration device is activated carbon.
According to a further technical scheme, the catalytic combustion bed is provided with a catalyst, and the catalyst is granular or honeycomb.
The utility model discloses compare prior art's beneficial effect and lie in:
1. the waste gas of VOCs which is sent to the catalytic bed for oxidation reaction is desorbed from the adsorption concentration device by hot air. The desorption temperature and the air quantity are controlled according to the requirement to reach the required temperature, so that the reaction can be smoothly carried out in the catalytic combustion bed, the exothermic heat of the reaction is enough to maintain the temperature required by the reaction, the reaction heat of the VOCs waste gas is fully utilized, the reaction temperature can be maintained, the desorption and regeneration can be carried out on the adsorption and concentration device by using the adsorption and regeneration device, the power consumption is reduced, and the self-thermal balance operation can be realized. The heat utilization rate is high, no external supplementary heat is needed, and the device is economical and safe.
2. The adsorption concentration unit is provided with a plurality of same adsorption concentration devices, wherein the 1 st to (n-1) th devices are used for adsorption at the beginning, and the nth device is used for desorption; after a certain time, switching to the adsorption of the 2 nd to the nth devices and the desorption of the 1 st device; so the circulation operation repeatedly, the continuity of production is guaranteed to one side like this, and on the other hand utilizes the circulation of many devices to switch in turn and can make the volume of server less greatly, not only makes the volume greatly reduced of adsorption concentration device, and the use amount of high-priced carbon fiber can not cause the problem that the cost is high in addition.
3. The system integrates adsorption purification, desorption and concentrated catalytic combustion, the adsorption and concentration device adopts an assembled structure, the material replacement is simple, and the occupied area of the whole system is small (30 m)2Left and right), high purification efficiency, simple operation and reliable performance.
4. The system has thorough purification and can not cause secondary pollution. Can purify polluted gas with the concentration above the allowable concentration of the industrial hygiene standard, and the treated air quantity can reach 30000m3And/h, the pollution gas with the same concentration and air quantity is treated, and the power consumption is only 1/5 of the common catalytic combustion method.
Drawings
FIG. 1 is a block diagram of a VOCs adsorption-catalytic combustion system of the present invention;
FIG. 2 is a block diagram of the VOCs adsorption-catalytic combustion system of the present invention;
the designations in the drawings have the following meanings:
21. an air intake duct; 22. an air outlet pipe; 23. an adsorption fan; 24. a first adsorption concentration device; 25. a second adsorption concentration device; 26. supplementing a cold air blower; 27. a thermocouple; 28. a desorption fan; 29. a catalytic combustion bed; 30. a filter; 31. a gas-collecting hood; 32. a concentrated waste gas tank; a/b/c/d/e/f/g/, butterfly valve; h/i, multi-way valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following description, in conjunction with the accompanying drawings and embodiments, will be further detailed, and all other embodiments obtained by those skilled in the art without creative work belong to the scope of the present invention.
Example 1
As shown in fig. 1, a VOCs adsorption-catalytic combustion system comprises a conveying unit, an adsorption concentration unit and a catalytic combustion unit, wherein the conveying unit comprises an air inlet pipeline 21 and an exhaust pipeline 22; the adsorption concentration unit comprises an adsorption fan 23 connected with the air inlet pipeline 21, and a first adsorption concentration device 24 and a second adsorption concentration device 25 which are respectively connected with the adsorption fan 23 and the exhaust pipeline 22, wherein the first adsorption concentration device 24 and the second adsorption concentration device 25 are arranged in parallel; one ends of the first adsorption concentration device 24 and the second adsorption concentration device 25 are communicated with the adsorption fan 23 through a multi-way valve, and the other ends are communicated with the exhaust pipeline 22 through the multi-way valve; the catalytic combustion unit comprises a desorption fan 28 connected with the first adsorption concentration device 24 and the second adsorption concentration device 25, and a catalytic combustion bed 29 connected with the desorption fan 28. The catalytic combustion bed 29 is provided with a burner, which is directed towards the catalytic combustion bed 29. This exhaust-gas treatment system still sets up the air compensation unit, and this air compensation unit includes with the benefit air-cooler 26 that adsorbs enrichment facility pipeline intercommunication, still including setting up thermocouple 27 on adsorbing the pipeline between enrichment facility and benefit air-cooler 26.
Example 2
As shown in fig. 1, a VOCs adsorption-catalytic combustion system operates as follows: VOCs waste gas gets into the adsorption concentration device under the drive of adsorption fan 23, and adjustment multi-way valve h makes VOCs waste gas get into first adsorption concentration device 24 and adsorbs, and adjustment multi-way valve i passes through exhaust duct and emits into the atmosphere after adsorbing the purification, and second adsorption concentration device 25 is in the desorption state. On first adsorption, the burner in the catalytic combustion bed 29 was turned on and the catalytic combustion bed 29 was preheated to 300 ℃. When the activated carbon of the first adsorption concentration device 24After the fibers are adsorbed and saturated, the multi-way valve h is adjusted to enable the second adsorption concentration device 25 to adsorb, the thermocouple 27 is opened to heat at the moment, the air supplementing fan 26 is opened, the butterfly valves g, b and a are opened, the organic matters adsorbed by the first adsorption concentration device 24 are blown and desorbed under 120 ℃ hot air, the desorbed high-concentration VOCs waste gas enters the catalytic combustion bed 29 under the drive of the desorption fan 28, and the waste gas is combusted and decomposed into CO under the catalytic action of the catalyst2And H2And O. The purified high-temperature gas can be discharged through an exhaust pipeline after a butterfly valve e is opened, or can enter a thermocouple 27 after a butterfly valve f is opened to be used as desorption hot gas to sweep the adsorption concentration device 24, at the moment, the heating of the thermocouple 27 and a burner in a combustion bed 29 can be stopped, and the heat balance of the whole catalytic combustion system is realized through an emptying valve and a supplementary cooling fan 26.
Example 3
Further optimization was performed on the basis of a VOCs adsorption-catalytic combustion system as described in example 1 and shown in FIG. 2. A filter 30 is provided at the front end of the adsorption fan 23 on the intake duct 21, a gas collecting hood 31 of the adsorption fan 23 on the intake duct 21, and a concentrated exhaust gas tank 32 is provided between the desorption fan 28 and the catalytic combustion bed 29. The filter 30 can primarily filter the VOCs waste gas to remove large suspended matters in the VOCs waste gas and prevent the pipeline from being blocked; the gas-collecting hood 31 and the concentrated waste gas tank 32 are provided with valves, which can respectively adjust the flow and the flow velocity of the waste gas entering the adsorption concentration device from the gas-collecting hood 31 and the flow velocity of the waste gas entering the catalytic combustion bed 29 from the concentrated waste gas tank 32, so that the VOCs waste gas can be fully treated, and the heat energy generated in the treatment process can not be wasted.
The above is only the embodiment of the present invention, not so limit the scope of the present invention, so that the simple change and equivalent transformation of the specification and drawings should be included in the scope of the present invention.
Claims (5)
1. A VOCs adsorption-catalytic combustion system comprises a conveying unit, an adsorption concentration unit and a catalytic combustion unit, and is characterized in that the conveying unit comprises an air inlet pipeline (21) and an exhaust pipeline (22); the adsorption concentration unit comprises an adsorption fan (23) connected with the air inlet pipeline (21) and a plurality of adsorption concentration devices respectively connected with the adsorption fan (23) and the exhaust pipeline, and the adsorption concentration devices are arranged in parallel; the catalytic combustion unit comprises a desorption fan (28) connected with a plurality of adsorption concentration devices and a catalytic combustion bed (29) connected with the desorption fan (28).
2. A system for adsorptive-catalytic combustion of VOCs according to claim 1, wherein: the system is provided with an air compensation unit, the air compensation unit comprises a supplement air cooler (26) communicated with an adsorption concentration device pipeline, and the system further comprises a thermocouple (27) arranged on the pipeline between the adsorption concentration device and the supplement air cooler (26).
3. A system for adsorptive-catalytic combustion of VOCs according to claim 2, wherein: and an air outlet pipeline of the catalytic combustion bed (29) is connected with pipelines between the cold supplement fan (26) and the thermocouple (27).
4. A system for adsorptive-catalytic combustion of VOCs according to claim 1 or claim 2, wherein: the adsorbent adopted by the adsorption concentration device is activated carbon.
5. A system for adsorptive-catalytic combustion of VOCs according to claim 1, 2 or 3 wherein: the catalytic combustion bed (29) is provided with a granular or honeycomb catalyst.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922488315.6U CN211725246U (en) | 2019-12-30 | 2019-12-30 | VOCs adsorbs-catalytic combustion system |
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| CN201922488315.6U CN211725246U (en) | 2019-12-30 | 2019-12-30 | VOCs adsorbs-catalytic combustion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113457368A (en) * | 2021-06-21 | 2021-10-01 | 江苏徐工工程机械研究院有限公司 | Asphalt flue gas concentration device, system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113457368A (en) * | 2021-06-21 | 2021-10-01 | 江苏徐工工程机械研究院有限公司 | Asphalt flue gas concentration device, system and method |
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