CN213348301U - Device for treating automobile maintenance spraying waste gas through activated carbon adsorption, desorption and catalytic combustion - Google Patents
Device for treating automobile maintenance spraying waste gas through activated carbon adsorption, desorption and catalytic combustion Download PDFInfo
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- CN213348301U CN213348301U CN202021727250.2U CN202021727250U CN213348301U CN 213348301 U CN213348301 U CN 213348301U CN 202021727250 U CN202021727250 U CN 202021727250U CN 213348301 U CN213348301 U CN 213348301U
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Abstract
The utility model relates to an environmental protection technical field specifically, relates to an active carbon adsorption desorption catalytic combustion handles auto repair spraying waste gas device. The device comprises a collecting and mixing unit, a pretreatment unit, an activated carbon adsorption and desorption unit, a catalytic combustion unit and a control unit; the collecting and mixing unit, the pretreatment unit, the activated carbon adsorption and desorption unit and the catalytic combustion unit are sequentially arranged along the flowing direction of the waste gas; the utility model discloses can realize collecting, concentrating the improvement to the dispersion of the spraying waste gas of auto repair trade, can realize that active carbon adsorption system adsorbs in succession, regularly desorbs, and heat accumulation formula catalytic combustion device (RCO) is regularly (discontinuous) the start carries out centralized processing to the waste gas after the desorption is concentrated. The device has high-efficiency treatment and purification efficiency on the spraying waste gas containing Volatile Organic Compounds (VOCs) with low concentration and large air quantity generated in the production process of the automobile maintenance industry.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, specifically, relate to a device that contains Volatile Organic Compounds (VOCs) waste gas control that is used for auto repair trade spraying process to produce.
Background
In the automobile maintenance industry, a large amount of spraying waste gas containing Volatile Organic Compounds (VOCs) is generated in the links of paint mixing, spraying, leveling, baking, spray gun cleaning and the like in the process of carrying out metal plate paint spraying maintenance, and the main components of pollutants in the spraying waste gas comprise benzene series, alcohol ether, ester, paint mist and the like. Because the production characteristics of the automobile maintenance industry are intermittent production and unbalanced yield, the spraying waste gas also presents large air volume (rated air volume 15000-20000 m/h of a single spray booth), low concentration (initial concentration of VOCs is generally 100-200 mg/m) and large concentration fluctuation and discontinuous emission.
The automobile maintenance enterprise is small in scale relatively, large in quantity, distributed and dispersed, and is located urban population dense areas, the integrated spray-baking finish house is generally adopted, spraying, leveling, VOCs contained in the baking process coating almost all volatilize to the air of the spray-baking finish house, mainly utilize the cotton trapping paint mist particles of filtration land, utilize terminal processing facilities such as activated carbon adsorption, UV light oxygen, activated carbon adsorption + UV light oxygen to handle the VOCs in the waste gas, the terminal processing facility is simple, the treatment effect is not obvious, hardly realize discharge to reach the standard. Links such as paint mixing, spray gun cleaning and the like are generally managed weakly, some links are even operated in an open area, and generated volatile organic compounds are difficult to effectively collect and treat and are important inorganization emission sources. A large amount of substandard waste gas is directly discharged into the environment, and is mostly discharged in low altitude, PM2.5 and photochemical smog pollution are extremely easily formed, the influence on the environment and human health is particularly obvious, and the serious environmental pollution problem in cities is formed.
In 2013, the spraying waste gas treatment in the automobile maintenance industry is brought into the technical policy of volatile organic pollution prevention and control issued by the environmental protection department, and VOCs emission standards in the automobile maintenance industry are also brought out from various places in succession. Along with the strictness of environmental protection law enforcement in recent years, the spraying waste gas treatment strength in the automobile maintenance industry is continuously strengthened, and the existing distributed treatment measures can not meet the requirement of environmental protection management, so that a treatment process and a device suitable for the waste gas working condition in the automobile maintenance industry are urgently needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that current treatment process and device treatment effect are unsatisfactory, can not satisfy the requirement of environmental protection management, the utility model provides a high-efficient treatment technology that the treatment effeciency is high, the running cost is low that is applicable to auto repair trade waste gas operating mode characteristics.
The utility model provides a device for treating automobile maintenance waste gas by activated carbon adsorption desorption catalytic combustion, which comprises a collecting and mixing unit, a pretreatment unit, an activated carbon adsorption desorption unit, a catalytic combustion unit and a control unit;
the collecting and mixing unit, the pretreatment unit, the activated carbon adsorption and desorption unit and the catalytic combustion unit are sequentially arranged along the flowing direction of the waste gas;
the collecting and mixing unit comprises a paint mist catching device of a paint spray chamber, a waste gas collecting pipeline of each process link, a waste gas induced fan of each process link and a wind mixing chamber;
the pretreatment unit comprises at least one filtering device;
the active carbon adsorption and desorption unit comprises an adsorption pipeline, an active carbon adsorption device, a main exhaust fan, an exhaust pipeline, a desorption pipeline and a nitrogen making unit;
the catalytic combustion unit comprises a desorption fan and a catalytic purification device;
the control unit comprises an exhaust gas treatment device control system.
Further, the utility model provides a pair of device of auto repair waste gas is handled in active carbon adsorption desorption catalytic combustion still has following structural feature: the paint mist catching device of the paint spraying chamber is one or more selected from a labyrinth dry filter, a non-woven fabric dry filter and a filter cotton dry filter.
The paint mist capturing device of the paint spraying chamber is used for removing paint mist and particles with larger diameters in spraying waste gas;
when the paint mist capturing devices of the paint spraying chamber are more than one stage, the paint mist capturing devices of all stages are sequentially arranged along the flowing direction of the waste gas flow of the paint spraying chamber;
the waste gas of the paint spraying chamber sequentially passes through all stages of paint mist capturing devices.
Preferably, the paint mist catching device of the paint spray booth generally comprises more than two stages.
Further, the utility model provides a pair of device of auto repair waste gas is handled in active carbon adsorption desorption catalytic combustion still has following structural feature: the filtering equipment of the pretreatment unit is selected from one or more of a filter cotton dry filter, a plate type dry filter and a bag filter.
When the filtering equipment is more than one stage, all stages of filtering equipment are sequentially arranged in parallel along the direction of the waste gas flow;
each stage of filtering equipment is provided with a differential pressure meter, and the filter is replaced according to a system differential pressure alarm prompt (when the differential pressure is greater than 250 Pa);
preferably, the filtration device generally contains more than three stages.
Further, the utility model provides a pair of device of auto repair waste gas is handled in active carbon adsorption desorption catalytic combustion still has following structural feature: the adsorption pipeline of the active carbon adsorption and desorption unit is connected with the top of the active carbon adsorption device, the exhaust pipeline is connected with the bottom of the active carbon adsorption device, the main exhaust fan is connected with the exhaust pipeline, and the purified exhaust gas reaching the standard is discharged into the exhaust funnel under the action of the main exhaust fan. The desorption hot air enters the activated carbon adsorption device from the bottom of the activated carbon adsorption device through the desorption pipeline, and the desorption gas enters the desorption pipeline through the top of the activated carbon adsorption device and enters the catalytic purification device under the action of the desorption fan. The nitrogen gas storage tank of nitrogen generator group links through pipeline and each active carbon adsorption device top, through the temperature sensor control nitrogen valve who sets up in active carbon adsorption device, in case the inside temperature of active carbon adsorption device is higher than the settlement temperature value, the nitrogen gas valve is opened, and nitrogen gas gets into active carbon adsorption device and cools down the active carbon.
When more than two active carbon adsorption devices are arranged, the active carbon adsorption devices are arranged in parallel;
preferably, the number of the activated carbon adsorption devices is two or more, and the operation state of N (the total number of the activated carbon adsorption devices is N + 1) adsorption and 1 desorption is always maintained. And N represents the number of the activated carbon adsorption devices, and is a natural number greater than 0.
Further, the utility model provides a pair of device of auto repair waste gas is handled in active carbon adsorption desorption catalytic combustion still has following structural feature: the catalytic purification unit of the device is preferably a regenerative catalytic combustion (RCO) unit. The desorbed organic waste gas is sent into a catalytic purification device through a desorption pipeline under the action of a desorption fan, the waste gas is preheated through a heat storage bed, the organic waste gas is heated to a higher temperature and then enters an oxidation chamber, a burner is used for burning in the oxidation chamber to supplement heat, and finally organic components in the waste gas are decomposed into CO2And H2And O, the high-temperature waste gas after the waste gas after reaching the standard is purified leaves the oxidation chamber and enters the regenerator to release heat, the part after the temperature is reduced enters the activated carbon adsorption device as desorption gas to be desorbed, and the other part is discharged to the air through the exhaust funnel by the exhaust fan. While the ceramic regenerator of the regenerator absorbs heat, "stores" a large amount of heat (for the next cycle to heat the exhaust gas).
Further, the utility model provides a pair of device of auto repair waste gas is handled in active carbon adsorption desorption catalytic combustion still has following structural feature: the control system of the waste gas treatment device is preferably a PLC control system, has the functions of equipment working condition monitoring, flow picture display, parameter display, alarm display, automatic interlocking protection, data display, data storage and the like, and is provided with an emergency stop function.
Further, the utility model provides a pair of device of auto repair waste gas is handled in active carbon adsorption desorption catalytic combustion still has following structural feature: the fans such as a waste gas induced fan, a main exhaust fan, a desorption fan and the like in each process link of the device are preferably low-noise centrifugal fans or axial flow fans, and the motors matched with the fans are preferably variable frequency motors.
The method for treating the automobile maintenance waste gas by using the device to carry out the adsorption, desorption and catalytic combustion of the activated carbon comprises the following steps: waste gas generated in each process link of paint mixing, spraying, leveling, drying and spray gun cleaning in the maintenance process is dispersed and collected, and the waste gas is purified and discharged up to the standard after paint mist and particulate matters are removed, mixing, pretreatment and filtration, activated carbon adsorption and desorption and catalytic combustion reaction are carried out in sequence.
When waste gas treatment is carried out, paint mixing waste gas, spraying waste gas, leveling waste gas, drying waste gas, spray gun cleaning waste gas and dangerous waste chamber waste gas generated in the spraying process enter a air mixing chamber for mixing and cooling through a waste gas collecting pipeline (wherein the spraying waste gas needs to be subjected to paint mist and particulate matter removal through a paint mist catching device of the paint spraying chamber before entering the air mixing chamber) under the action of a waste gas draught fan in each process link. The mixed waste gas after intensive mixing and cooling in the air mixing chamber enters a pretreatment unit filtering device (three-stage dry filtering) to remove water vapor, dust and impurities in the waste gas under the action of a main exhaust fan, the relatively pure organic waste gas is filtered in multiple stages and enters an activated carbon adsorption device through an adsorption pipeline to be adsorbed and purified, organic substances are intercepted by the specific acting force of the activated carbon in the organic waste gas adsorption device, and the clean gas is exhausted through an exhaust pipe. After a period of time of adsorption, the activated carbon adsorption devices are sequentially close to a saturated state, and at the moment, the valves are automatically switched to enable the activated carbon adsorption devices with saturated adsorption to enter a desorption state.
The combustion unit of catalytic combustion unit adds hot-air, and hot-air gets into activated carbon adsorption device through the desorption pipeline and carries out the desorption under desorption fan's effect, and organic matter in the activated carbon receives volatilizing from the activated carbon after the hot-air heating, and the organic waste gas of high concentration, little amount of wind, high temperature that the desorption came out passes through the desorption pipeline and gets into catalytic purification device, makes the VOCs composition oxidative decomposition in the waste gas become harmless high temperature CO under the pyrolysis effect2And water vapor, the organic matters maintain spontaneous combustion by utilizing heat released by self-oxidation combustion, and the treated waste gas is taken as desorption gas to enter an activated carbon adsorption device for desorption.
The utility model has the advantages that:
the utility model provides a pair of device of active carbon adsorption desorption catalytic combustion processing auto repair waste gas, it is collected the mixing unit and can be collected the waste gas that all process links that relate to VOCs such as transfer lacquer, spraying, levelling, stoving and spray gun washing in the maintenance process produced, has solved the problem of spraying waste gas effective collection processing. The exhaust gas collection inlet of the paint spraying chamber is provided with a labyrinth type carton filter and a glass fiber cotton two-stage dry paint mist capturing device, so that paint mist and particles can be effectively removed, and the workload of the subsequent process links of the treatment device is reduced. The collected waste gas enters the air mixing chamber for fully mixing and cooling, and the operation effect of the treatment device is ensured.
The optimal scheme of the pretreatment unit adopts three-stage filtration, the first stage is a paint mist filter felt, the second stage is a plate type dry filter, and the third stage is a bag type filter, so that paint mist, particles and other impurities in waste gas can be further removed, the relative cleanness of the waste gas to be treated is ensured, and the adsorption efficiency and the service life of the activated carbon of the adsorption unit are improved.
The preferred quantity of active carbon adsorption device be N +1, in the course of the work, have N all the time and adsorb the operation, 1 regularly carries out the desorption operation, can realize the continuous absorption of system, regularly the function of desorption, can ensure that exhaust emission lasts stably up to standard, can adapt to the intermittent type formula production of auto repair trade again, the production characteristics that output exists undulant everyday.
The preferential proposal of the catalytic purification device is a heat accumulating type catalytic combustion (RCO) device which is a heat accumulating type thermal incineration two-bed structure. Mainly comprises a heat storage chamber and an oxidation chamber. The oxidation chamber is a main reaction place for treating the organic waste gas, the designed normal operation temperature is about 280-350 ℃, and the organic waste gas reacts in the oxidation chamber to generate CO2And H2And O, the oxidation chamber is positioned at the upper part of the regenerative chamber, and the front section of the chamber body is provided with an operating platform. A safe automatic pressure relief opening is arranged above the furnace body, so that the pressure is automatically relieved when the pressure in the furnace is ultrahigh, and the furnace body can be used for internal overhaul and ceramic maintenance and replacement; the end face is provided with a high-temperature discharge port which is automatically opened when the temperature is ultrahigh and is cooled by cold air.
The utility model discloses can realize collecting, concentrating the improvement to the dispersion of the spraying waste gas of auto repair trade, can realize that active carbon adsorption system adsorbs in succession, regularly desorbs, and heat accumulation formula catalytic combustion device (RCO) is regularly (discontinuous) the start carries out centralized processing to the waste gas after the desorption is concentrated. The method can ensure that the exhaust emission continuously and stably reaches the standard, and can adapt to the production characteristics of intermittent production and daily output fluctuation in the automobile maintenance industry. The device has high-efficiency treatment and purification efficiency on the spraying waste gas containing Volatile Organic Compounds (VOCs) with low concentration and large air quantity generated in the production process of the automobile maintenance industry.
Drawings
Fig. 1 is the utility model relates to a structural schematic diagram of the device of active carbon adsorption desorption catalytic combustion processing auto repair waste gas.
Fig. 2 is the utility model relates to an active carbon adsorption desorption unit's of device of active carbon adsorption desorption catalytic combustion processing auto repair waste gas structure schematic diagram.
Fig. 3 is the utility model relates to a catalytic combustion unit's of device of active carbon adsorption desorption catalytic combustion processing auto repair waste gas structure schematic diagram.
In the drawings, the reference numbers: 1, a collecting and mixing unit, 11 air inducing fans, 12 paint mist catching devices of a paint spraying chamber, 13 air mixing chambers and 14 emergency discharge pipelines; 2, a pretreatment unit, 21 a pretreatment unit filtering box body, 22 paint mist filtering felt, 23 plate type dry filters and 24 bag type filters; 3 activated carbon adsorption and desorption units, 31 adsorption pipelines, 32 activated carbon adsorption devices, 33 desorption pipelines, 34 main exhaust fans, 35 exhaust pipelines and 36 nitrogen generation units; 4, a catalytic combustion unit, a 41 catalytic purification device and a 42 desorption fan; 5 a control unit.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of examples.
The utility model provides a pair of device of auto repair waste gas is handled in active carbon adsorption desorption catalytic combustion, including collecting mixing unit 1, preprocessing unit 2, active carbon adsorption desorption unit 3, catalytic combustion unit 4, the control unit 5.
The collecting and mixing unit 1 is respectively communicated with a paint mixing room, a spray gun cleaning room, a spray booth, a leveling room, a drying room and a hazardous waste room exhaust system through collecting pipelines. The induced draft fans 11 of each process link are arranged in corresponding collecting pipelines, waste gas in a paint mixing room, a spray gun cleaning room, a paint spraying room, a leveling room, a drying room and a hazardous waste room enters the air mixing room 13 through corresponding collecting pipelines under the action of the induced draft fans 11, and the waste gas in the paint spraying room enters the air mixing room 13 after being filtered by the paint mist catching device 12 of the paint spraying room under the action of the induced draft fans 11. All the waste gas to be treated is fully mixed and cooled in the air mixing chamber 13. The air mixing chamber 13 is provided with an emergency discharge pipeline 14 which is communicated with an exhaust funnel so as to meet the requirements of equipment maintenance or emergency treatment.
The pretreatment unit filter box body 21 of the pretreatment unit 2 is provided with an air inlet and an air outlet, the air inlet is communicated with the air mixing chamber 13 through a pipeline, and the air outlet is communicated with the activated carbon adsorption and desorption unit 3 through a pipeline. The paint mist filter felt 22, the plate type dry filter 23 and the bag type filter 24 are arranged inside the pretreatment unit filter box body 21 in sequence in the exhaust gas flowing direction.
The top of the body of the activated carbon adsorption device 32 of the activated carbon adsorption desorption unit 3 is respectively provided with a waste gas inlet, a desorption gas outlet and a nitrogen inlet, the bottom is respectively provided with an exhaust port and a desorption gas inlet, and honeycomb activated carbon is placed inside the activated carbon adsorption device 32. One end of the adsorption pipeline 31 is communicated with the air outlet of the pretreatment unit filtering box body 21, and the other end is communicated with the waste gas inlet at the top of the activated carbon adsorption device 32. One end of an air inlet pipe of the desorption pipeline 33 is communicated with a hot air outlet of the catalytic combustion unit 4, the other end of the air inlet pipe is communicated with a desorption gas inlet at the bottom of the activated carbon adsorption device 32, one end of an exhaust pipeline of the desorption pipeline 33 is communicated with a desorption gas outlet of the activated carbon adsorption device 32, and the other end of the exhaust pipeline is communicated with the catalytic purification device 41 through a desorption fan 42. One end of the exhaust pipeline 35 is communicated with an exhaust port at the bottom of the activated carbon adsorption device 32, and the other end is communicated with an exhaust funnel through a main exhaust fan 34. The 36 nitrogen making unit is communicated with the nitrogen inlet of the activated carbon adsorption device 32 through a pipeline. The preferred quantity of active carbon adsorption device described in this embodiment is 12, and in the course of the work, there are 11 all the time and carry out the absorption operation, 1 regularly carries out the desorption operation.
The catalytic purification device 41 of the catalytic combustion unit 4 is provided with an air inlet, a hot air outlet and an air outlet, the air inlet is communicated with the exhaust pipeline of the desorption pipeline 33 through a desorption fan 42, the hot air outlet is communicated with the air inlet pipe of the desorption pipeline 33, and the air outlet is communicated with the exhaust funnel.
The control unit 5 controls the apparatus by using various control elements provided in the collection and mixing unit 1, the pretreatment unit 2, the activated carbon adsorption and desorption unit 3, and the catalytic combustion unit 4 through a control circuit.
When waste gas treatment is carried out, paint mixing waste gas, spraying waste gas, leveling waste gas, drying waste gas, spray gun cleaning waste gas and dangerous waste chamber waste gas generated in the spraying process enter a air mixing chamber 13 for mixing and cooling through a waste gas collecting pipeline (wherein the spraying waste gas needs to be subjected to paint mist and particulate matter removal through a paint mist catching device 12 of the paint spraying chamber before entering the air mixing chamber 13) under the action of a waste gas induced draft fan 11 in each process link. The mixed exhaust gas after thorough mixing and cooling in the air mixing chamber 13 enters a filtering device (three-stage dry filtering, the first stage is paint mist filter felt, the second stage is plate dry filter, the third stage is bag filter) of the pretreatment unit 2 to remove the water vapor, dust and impurities in the exhaust gas under the action of a main exhaust fan 34, the 'relatively pure organic exhaust gas' after multi-stage filtering enters an active carbon adsorption device 32 through an adsorption pipeline 31 to be adsorbed and purified, the organic substances are intercepted inside the active carbon adsorption device, and the clean gas is exhausted through an exhaust pipe 35 through an exhaust funnel. After a period of time of adsorption, the activated carbon adsorption devices 32 approach the saturation state in sequence, and at the moment, the valves are automatically switched, so that the activated carbon adsorption devices 32 with saturated adsorption enter the desorption state.
The combustion unit of the catalytic combustion unit 4 heats air, the hot air enters the activated carbon adsorption device 32 through the desorption pipeline 33 under the action of the desorption fan 42 for desorption, organic matters in the activated carbon volatilize from the activated carbon after being heated by the hot air, the desorbed organic waste gas with high concentration, small air volume and high temperature enters the catalytic purification device 41 through the desorption pipeline 33, and VOCs components in the waste gas are oxidized and decomposed into harmless high-temperature CO under the pyrolysis action2And water vapor, the organic matter utilizes the heat released by the self-oxidation combustion to maintain spontaneous combustion, one part of the treated standard-reaching waste gas is discharged through the exhaust funnel after being cooled, and the other part of the treated standard-reaching waste gas is used as desorption gas to enter the activated carbon adsorption device 32 for desorption.
Of course, although the utility model discloses although specially design for vapour industry spraying waste gas characteristics, nevertheless not be used for the restriction the utility model discloses. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The present invention is capable of other embodiments, and various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. The device for treating automobile maintenance spraying waste gas through activated carbon adsorption desorption catalytic combustion is characterized by comprising a collecting and mixing unit (1), a pretreatment unit (2), an activated carbon adsorption desorption unit (3), a catalytic combustion unit (4) and a control unit (5); the collecting and mixing unit (1), the pretreatment unit (2), the activated carbon adsorption and desorption unit (3) and the catalytic combustion unit (4) are sequentially arranged along the flowing direction of the waste gas;
the collecting and mixing unit (1) comprises a paint mist catching device (12) of a paint spray chamber, a waste gas collecting pipeline of each process link, a waste gas induced draught fan (11) of each process link and a wind mixing chamber (13);
the pretreatment unit (2) comprises at least one filtering device;
the active carbon adsorption and desorption unit (3) comprises an adsorption pipeline (31), an active carbon adsorption device (32), a main exhaust fan (34), an exhaust pipeline (35), a desorption pipeline (33) and a nitrogen making unit (36);
the catalytic combustion unit (4) comprises a desorption fan (42) and a catalytic purification device (41);
the control unit (5) comprises a control system of the exhaust gas treatment device.
2. The device for treating the automobile maintenance spraying exhaust gas through the activated carbon adsorption, desorption, catalytic combustion as set forth in claim 1, wherein the paint mist catching device (12) of the paint spray booth is one or more selected from a labyrinth dry filter, a non-woven dry filter and a filter cotton dry filter.
3. The device for treating the automobile maintenance spraying exhaust gas through the activated carbon adsorption, desorption, catalytic combustion as claimed in claim 1, wherein the filtering equipment of the pretreatment unit (2) is selected from one or more of a filter cotton dry filter, a plate type dry filter and a bag type filter.
4. The device for treating the automobile maintenance spraying exhaust gas through the adsorption, desorption and catalytic combustion of the activated carbon according to claim 1, characterized in that the pretreatment unit (2) adopts three-stage filtration, wherein the first stage is a paint mist filter felt, the second stage is a plate type dry filter, and the third stage is a bag type filter.
5. The device for treating automobile maintenance sprayed exhaust gas through activated carbon adsorption, desorption and catalytic combustion as claimed in claim 1, wherein the adsorption pipeline (31) of the activated carbon adsorption and desorption unit (3) is connected with the top of the activated carbon adsorption device (32), the exhaust pipeline (35) is connected with the bottom of the activated carbon adsorption device (32), the main exhaust fan (34) is connected with the exhaust pipeline (35), and the purified exhaust gas reaching the standard is discharged into the exhaust funnel under the action of the main exhaust fan (34);
desorption hot air enters from the bottom of the activated carbon adsorption device (32) through a desorption pipeline (33), desorption gas enters the desorption pipeline (33) through the top of the activated carbon adsorption device (32), and enters the catalytic purification device (41) under the action of a desorption fan (42);
the nitrogen gas storage tank of the nitrogen making unit (36) is connected with the top of each active carbon adsorption device (32) through a pipeline.
6. The device for treating automobile maintenance spraying exhaust gas through activated carbon adsorption, desorption and catalytic combustion as claimed in claim 1, wherein N +1 activated carbon adsorption devices are provided, and the operating state of N adsorption and 1 desorption devices is always maintained, wherein N represents the number of the activated carbon adsorption devices, and N is a natural number greater than 0.
7. The device for treating automobile maintenance spraying exhaust gas by activated carbon adsorption, desorption and catalytic combustion as claimed in claim 6, wherein the activated carbon adsorption devices are arranged in parallel.
8. The device for treating the automobile maintenance spraying exhaust gas by the activated carbon adsorption desorption catalytic combustion as claimed in claim 1, wherein the catalytic purification device (41) of the device is a regenerative catalytic combustion device.
9. The device for treating automobile maintenance spraying exhaust gas by activated carbon adsorption, desorption and catalytic combustion as claimed in claim 1, wherein the exhaust gas treatment device control system is a PLC control system.
10. The device for treating automobile maintenance spraying exhaust gas through activated carbon adsorption desorption catalytic combustion as claimed in claim 1, wherein the induced air fan (11), the main exhaust air fan (34) and the desorption air fan (42) are low-noise centrifugal fans or axial flow fans.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116078102A (en) * | 2022-12-26 | 2023-05-09 | 中国重型机械研究院股份公司 | VOCs efficient combined treatment system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116078102A (en) * | 2022-12-26 | 2023-05-09 | 中国重型机械研究院股份公司 | VOCs efficient combined treatment system and method |
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