An organic waste gas catalytic purification device with multi-stage airflow circulation function

Abstract

The present invention discloses a catalytic purification device for organic waste gas with a multi-stage airflow circulation function, which relates to the technical field of waste gas purification and includes a shell, an exhaust pipe, a spray module, a dry filter unit, an activated carbon filter module, a catalytic combustion module, a heat exchange module and a waste gas treatment unit. The shell is provided with an exhaust pipe, the shell is fixedly connected to the spray module, the spray module is connected to the dry filter unit pipeline, the dry filter unit is connected to the activated carbon filter module pipeline, the activated carbon filter module is fixedly connected to the shell, the activated carbon filter module is connected to the exhaust pipe pipeline, the activated carbon filter module is connected to the heat exchange module pipeline, the heat exchange module is fixedly connected to the shell, the heat exchange module is connected to the catalytic combustion module pipeline, the heat exchange module is connected to the waste gas treatment unit pipeline, the heat exchange module is connected to the exhaust pipe pipeline, the shell is fixedly connected to the catalytic combustion module, and the shell is fixedly connected to the waste gas treatment unit.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification, in particular to an organic waste gas catalytic purification device with a multi-stage airflow circulation function. Background Art

[0002] Organic waste gas is generally flammable and explosive, toxic and harmful, insoluble in water, soluble in organic solvents, and difficult to treat. Common treatment methods for organic waste gas include activated carbon adsorption, catalytic combustion, and acid-base neutralization.

[0003] In the existing technology, organic waste gas is directly discharged after being adsorbed by activated carbon, but some incompletely treated waste gas is directly discharged, affecting the air quality. When the organic waste gas is purified by activated carbon, the activated carbon is desorbed by heating it with air, and the air needs to be treated. Summary of the Invention

[0004] The purpose of the present invention is to provide a method to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A catalytic purification device for organic waste gas with a multi-stage airflow circulation function includes a shell, an exhaust pipe, a spray module, a dry filter unit, an activated carbon filter module, a catalytic combustion module, a heat exchange module and an exhaust gas treatment unit, the shell is provided with an exhaust pipe, the shell is fixedly connected to the spray module, the spray module is connected to the dry filter unit pipeline, the dry filter unit is connected to the activated carbon filter module pipeline, the activated carbon filter module is fixedly connected to the shell, the activated carbon filter module is connected to the exhaust pipe pipeline, the activated carbon filter module is connected to the heat exchange module pipeline, the heat exchange module is fixedly connected to the shell, the heat exchange module is connected to the catalytic combustion module pipeline, the heat exchange module is connected to the exhaust gas treatment unit pipeline, the heat exchange module is connected to the exhaust pipe pipeline, the shell is fixedly connected to the catalytic combustion module, and the shell is fixedly connected to the exhaust gas treatment unit.

[0006] The shell is used to fix various components, and the exhaust pipe is provided with a valve for discharging qualified gas. The spray module adds relevant chemical substances to treat some waste gases such as benzene waste gas, alcohol waste gas and aldehyde waste gas. The dry filter unit cleans water and untreated dust in the waste gas. A fan is installed in the pipe between the dry filter unit and the activated carbon filter module to increase the gas flow rate. The activated carbon filter module purifies the waste gas by adsorption. The unqualified waste gas after treatment by the activated carbon filter module is passed to the catalytic combustion module for treatment. The catalytic combustion module can also purify the gas desorbed by the activated carbon filter module through catalytic combustion. A flame arrester is installed at the outlet end of the catalytic combustion module to prevent the flame from entering the activated carbon filter module. The heat exchange module cools the high-temperature waste gas coming out of the catalytic combustion module and preheats the waste gas entering the catalytic combustion module to improve the combustion purification efficiency. The waste gas treatment unit adds relevant chemical substances to treat gases such as sulfides and nitrogen oxides generated after the combustion of the waste gas, and dries the gas and passes it into the heat exchange module.

[0007] Furthermore, the spray module includes a spray box, a swirl fan, a baffle, a spray air inlet, a support column, a mounting block, a filter plate, a liquid pump, a clean water tank, a transport pipe, a nozzle, a demisting plate and a spray air outlet. The spray air inlet is arranged on the side of the spray box, and the spray box is fixedly connected to the clean water tank on the side away from the spray air inlet. A mounting block is arranged in the spray box, and the mounting block is provided with a mounting groove and fixedly connected to the support column. The support column is rotatably connected to the swirl fan at one end away from the mounting block. The spray box is fixedly connected to the baffle, and the baffle is rotatably connected to the swirl fan. A filter plate is arranged on the side of the spray box close to the clean water tank, a liquid pump is placed in the clean water tank, and the liquid pump is connected to the transport pipe. Fixed connection, the transport pipe is fixedly connected to a plurality of nozzles at one end away from the liquid pump, the spray box is fixedly connected to the defogger plate at one end away from the mounting block, a spray outlet is provided on the top of the spray box, and the spray outlet is connected to the dry filter unit pipeline; the support column is used to support the swirl fan, the swirl fan stirs the air flow evenly, so that the exhaust gas is in uniform contact with the water sprayed from the nozzle, the baffle allows the exhaust gas to enter only from the swirl fan, the filter plate is used to isolate solid impurities such as dust from entering the clean water tank and affecting the operation of the liquid pump, the liquid pump sends water into the nozzle through the transport pipe, and the defogger plate processes the water mist generated by the nozzle to prevent the water mist from entering the dry filter unit, thereby affecting the service life of the dry filter unit.

[0008] Furthermore, the activated carbon filtration module includes a primary adsorption module, a secondary adsorption module and an activated carbon adsorption plate. The primary adsorption module is connected to the dry filter unit pipeline, the primary adsorption module is connected to the exhaust pipe pipeline, the primary adsorption module is connected to the heat exchange module pipeline, and the primary adsorption module is provided with several activated carbon adsorption plates. The secondary adsorption module is connected to the dry filter unit pipeline, the secondary adsorption module is connected to the exhaust pipe pipeline, the secondary adsorption module is connected to the heat exchange module pipeline, and the secondary adsorption module is provided with several activated carbon adsorption plates; the activated carbon adsorption plate is used to adsorb and treat exhaust gas. When the activated carbon adsorption plate is desorbed, the primary adsorption module and the secondary adsorption module can be used alternately without affecting the operation of the device.

[0009] Furthermore, the catalytic combustion module includes a combustion box, a primary combustion chamber, a secondary combustion chamber, a connecting pipe, a partition, a primary feed port, a primary combustion air inlet, a secondary combustion air outlet, a secondary feed port, a secondary combustion air inlet and a primary combustion air outlet, the combustion box is fixedly connected to the primary combustion chamber, the combustion box is fixedly connected to the secondary combustion chamber at one end away from the primary combustion chamber, a partition is arranged in the combustion box, the partition is located between the primary combustion chamber and the secondary combustion chamber, the secondary combustion air inlet is arranged on one side of the secondary combustion chamber close to the connecting pipe, the secondary feed port is arranged on one side of the secondary combustion chamber close to the secondary combustion air inlet, the secondary feed port passes through the combustion box, the secondary combustion air inlet passes through the combustion box and is fixedly connected to the connecting pipe, the primary combustion chamber is provided with a primary combustion air outlet on one side of the connecting pipe, a primary feed port is arranged at the top of the primary combustion chamber, the primary feed port passes through the combustion box, the primary combustion outlet passes through the combustion box and is fixedly connected to the connecting pipe at one end away from the secondary combustion chamber. , the first-level combustion chamber is provided with a first-level combustion air inlet on one side away from the first-level combustion outlet, the first-level combustion air inlet is connected to the heat exchange module pipeline through the combustion box, and the second-level combustion chamber is provided with a second-level combustion outlet on one side away from the second-level combustion air inlet, and the second-level combustion outlet is connected to the heat exchange module pipeline through the combustion box; the first-level combustion chamber is funnel-shaped, which is convenient for gas mixing, and the gas can move in a cyclonic manner in the first-level combustion chamber and slowly diffuse, so that the gas can be fully burned, and the combustion box can be filled with insulation material to reduce the heat loss of the first-level combustion chamber and the second-level combustion chamber. The connecting pipe is used to connect the first-level combustion chamber and the second-level combustion chamber, and the exhaust gas purification effect is improved by the multi-stage combustion chamber, the first-level feed port is used to introduce oxygen and fuel gas, the first-level combustion air inlet is used to introduce exhaust gas, the first-level combustion outlet discharges the gas in the first-level combustion chamber, the second-level combustion air inlet is introduced into the gas discharged from the first-level combustion chamber, the second-level feed port is used to introduce oxygen and fuel gas, and the second-level combustion outlet discharges gas.

[0010] Furthermore, the heat exchange module includes a primary heat exchange unit and a secondary heat exchange unit, the primary heat exchange unit is connected to the secondary heat exchange unit pipeline, the primary heat exchange unit is connected to the primary adsorption module pipeline, the primary heat exchange unit is connected to the secondary adsorption module pipeline, the primary heat exchange unit is connected to the exhaust pipe pipeline, the primary heat exchange unit is connected to the primary combustion air inlet pipeline, the secondary heat exchange unit is connected to the primary adsorption module pipeline, the secondary heat exchange unit is connected to the secondary adsorption module pipeline, the secondary heat exchange unit is connected to the exhaust pipe pipeline, and the secondary heat exchange unit is connected to the exhaust gas treatment unit pipeline; the primary heat exchange unit exchanges heat between the high-temperature gas after combustion and the gas entering the catalytic combustion module to improve energy utilization, the secondary heat exchange unit cools down the gas coming out of the primary heat exchange unit for a second time and sends it to the exhaust gas treatment unit, the low-temperature gas treated by the exhaust gas treatment unit is passed into the secondary heat exchange unit for heating, and the heated gas enters the activated carbon filter module to desorb the activated carbon adsorption plate.

[0011] Furthermore, the first-level adsorption module includes a first-level filter box, a first-level desorption air inlet, a first-level adsorption air inlet, a first-level desorption air outlet and a first-level adsorption air outlet. The first-level filter box is fixedly connected to a plurality of activated carbon adsorption plates. A first-level adsorption air outlet is provided at the bottom of the first-level filter box, a first-level desorption air inlet is provided at one end of the first-level filter box close to the first-level adsorption air outlet, a first-level adsorption air inlet is provided at the top of the first-level filter box, a first-level desorption air outlet is provided at one end of the first-level filter box close to the first-level adsorption air inlet, the first-level adsorption air inlet is connected to the dry filter unit pipeline, and the first-level desorption air outlet is provided. The attached air outlet is connected to the first-level heat exchange unit pipeline, the first-level adsorption air outlet is connected to the exhaust pipe pipeline, the first-level adsorption air outlet is connected to the first-level heat exchange unit pipeline, the first-level desorption air inlet is connected to the exhaust pipe pipeline, and the first-level desorption air inlet is connected to the second-level heat exchange unit pipeline; the first-level filter box is used to fix various components, the first-level adsorption air inlet allows exhaust gas to pass through, the first-level adsorption air outlet sends the qualified exhaust gas after treatment into the exhaust pipe, and the unqualified exhaust gas is sent to the first-level heat exchange unit, and a check valve is installed on the pipeline of the first-level adsorption air outlet to prevent gas from entering through the first-level adsorption air outlet.

[0012] Furthermore, the secondary adsorption module includes a secondary filter box, a secondary desorption air inlet, a secondary adsorption air inlet, a secondary desorption air outlet and a secondary adsorption air outlet. The secondary filter box is fixedly connected to a plurality of activated carbon adsorption plates. A secondary adsorption air outlet is provided at the bottom of the secondary filter box, a secondary desorption air inlet is provided at one end of the secondary filter box close to the secondary adsorption air outlet, a secondary adsorption air inlet is provided at the top of the secondary filter box, and a secondary desorption air outlet is provided at one end of the secondary filter box close to the secondary adsorption air inlet. The secondary adsorption air inlet is connected to the dry filter unit pipeline, and the secondary desorption air outlet is provided. The attached air outlet is connected to the first-level heat exchange unit pipeline, the secondary adsorption air outlet is connected to the exhaust pipe pipeline, the secondary adsorption air outlet is connected to the first-level heat exchange unit pipeline, the secondary desorption air inlet is connected to the exhaust pipe pipeline, and the secondary desorption air inlet is connected to the second-level heat exchange unit pipeline; the secondary filter box is used to fix various components, the secondary adsorption air inlet allows exhaust gas to pass through, the secondary adsorption air outlet sends the qualified exhaust gas after treatment into the exhaust pipe, and the unqualified exhaust gas is sent to the first-level heat exchange unit, and a check valve is installed on the pipeline of the secondary adsorption air outlet to prevent gas from entering through the secondary adsorption air outlet.

[0013] Furthermore, the first-level heat exchange unit is provided with a first-level main air inlet, a first-level main air outlet, a first-level auxiliary air inlet and a first-level auxiliary air outlet, one end of the first-level heat exchange unit is provided with a first-level main air inlet, the end of the first-level heat exchange unit away from the first-level main air inlet is provided with a first-level main air outlet, the end of the first-level heat exchange unit close to the first-level main air outlet is provided with a first-level auxiliary air inlet, the end of the first-level heat exchange unit close to the first-level main air inlet is provided with a first-level auxiliary air outlet, the first-level auxiliary air inlet is connected to the first-level adsorption air outlet pipe, the first-level auxiliary air inlet is connected to the first-level desorption air outlet pipe, the first-level auxiliary air inlet is connected to the second-level adsorption air outlet pipe, the first-level auxiliary air inlet is connected to the second-level desorption air outlet pipe The first-level auxiliary air outlet is connected to the first-level combustion air inlet pipeline, the first-level main air inlet is connected to the second-level combustion air outlet pipeline, and the first-level main air outlet is connected to the second-level heat exchange unit pipeline; the first-level main air inlet passes high-temperature gas, and valves are installed in the pipelines from the first-level adsorption air outlet and the first-level desorption air outlet to the first-level auxiliary air inlet. When the exhaust gas treated by the first-level adsorption module and the second-level adsorption module is unqualified, the valve is opened to subject the exhaust gas to catalytic combustion treatment, a check valve is installed in the pipeline from the second-level adsorption air outlet and the second-level desorption air outlet to the first-level auxiliary air inlet, and a fan is installed in the pipeline from the first-level auxiliary air outlet to the first-level combustion air inlet to increase the gas flow rate.

[0014] Furthermore, the secondary heat exchange unit is provided with a secondary main air inlet, a secondary main air outlet, a secondary auxiliary air outlet and a secondary auxiliary air inlet. One end of the secondary heat exchange unit is provided with a secondary main air inlet, the end of the secondary heat exchange unit away from the secondary main air inlet is provided with a secondary main air outlet, the end of the secondary heat exchange unit close to the secondary main air outlet is provided with a secondary auxiliary air outlet, and the end of the secondary heat exchange unit close to the secondary main air inlet is provided with a secondary auxiliary air inlet. The secondary main air inlet is connected to the first-level main air outlet pipeline, the second-level main air outlet is connected to the exhaust gas treatment unit pipeline, and the second-level auxiliary air inlet is connected to the exhaust gas treatment unit pipeline. The gas treatment unit pipeline is connected, the secondary auxiliary gas outlet is connected to the exhaust pipe pipeline, the secondary auxiliary gas outlet is connected to the primary desorption inlet pipeline, and the secondary auxiliary gas outlet is connected to the secondary desorption inlet pipeline; fans are installed in the primary main gas outlet and the secondary main gas inlet pipelines to increase the exhaust gas flow rate, the secondary main gas outlet sends the exhaust gas into the exhaust gas treatment unit for purification, and a fan is installed in the pipeline at the secondary auxiliary gas outlet to increase the gas flow rate. During adsorption, the valve of the exhaust pipe is opened to discharge the exhaust gas. During desorption, the valve of the exhaust pipe is closed and the gas circulates internally, and the treated low-temperature gas is introduced into the secondary auxiliary gas inlet.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The first-stage combustion chamber can improve the exhaust gas combustion purification efficiency, and the exhaust gas purification effect can be improved through the multi-stage combustion chamber;

[0017] 2. The heat exchange module reduces energy loss through multi-stage heat exchange;

[0018] 3. The activated carbon desorption process can be self-circulating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the spray module of the present invention;

[0021] Figure 3 This is a schematic structural diagram of the first-level adsorption module of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the secondary adsorption module of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the catalytic combustion module of the present invention;

[0024] Figure 6 Schematic diagram of the heat exchange module structure of the present invention;

[0025] Figure 7 Schematic diagram of the pipeline connection line of the present invention.

[0026] In the figure: 11. Shell; 12. Exhaust pipe; 2. Spray module; 201. Spray box; 202. Swirl fan; 203. Baffle; 204. Spray air inlet; 205. Support column; 206. Mounting block; 207. Filter plate; 208. Liquid pump; 209. Clean water tank; 210. Transport pipe; 211. Spray head; 212. Demisting plate; 213. Spray air outlet; 3. Dry filter unit; 4. Activated carbon filter module; 41. Primary adsorption module; 411. Primary filter box; 412. Primary desorption air inlet; 413. Primary adsorption air inlet; 414. Primary desorption air outlet; 415. Primary adsorption air outlet; 42. Secondary adsorption module; 421. Secondary filter box; 422. Secondary desorption air inlet; 423. Secondary adsorption air inlet; 424. Secondary desorption air outlet Air inlet; 425, secondary adsorption air outlet; 43, activated carbon adsorption plate; 5, catalytic combustion module; 501, combustion box; 502, primary combustion chamber; 503, secondary combustion chamber; 504, connecting pipe; 505, partition; 506, primary feed inlet; 507, primary combustion air inlet; 508, secondary combustion air outlet; 509, secondary feed inlet; 510, secondary combustion air inlet; 511, primary combustion air outlet; 6, heat exchange module; 61, primary heat exchange unit; 611, primary main air inlet; 612, primary main air outlet; 613, primary auxiliary air inlet; 614, primary auxiliary air outlet; 62, secondary heat exchange unit; 621, secondary main air inlet; 622, secondary main air outlet; 623, secondary auxiliary air outlet; 624, secondary auxiliary air inlet; 7, exhaust gas treatment unit. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: Figure 1-Figure 5As shown, the present invention provides a technical solution, a catalytic purification device for organic waste gas with a multi-stage airflow circulation function includes a shell 11, an exhaust pipe 12, a spray module 2, a dry filter unit 3, an activated carbon filter module 4, a catalytic combustion module 5, a heat exchange module 6 and an exhaust gas treatment unit 7, the shell 11 is provided with an exhaust pipe 12, the shell 11 is fixedly connected to the spray module 2, the spray module 2 is connected to the dry filter unit 3 through a pipeline, the dry filter unit 3 is connected to the activated carbon filter module 4 through a pipeline, the activated carbon filter module 4 is fixedly connected to the shell 11, the activated carbon filter module 4 is connected to the exhaust pipe 12 through a pipeline, the activated carbon filter module 4 is connected to the heat exchange module 6 through a pipeline, the heat exchange module 6 is fixedly connected to the shell 11, the heat exchange module 6 is connected to the catalytic combustion module 5 through a pipeline, the heat exchange module 6 is connected to the exhaust gas treatment unit 7 through a pipeline, the heat exchange module 6 is connected to the exhaust pipe 12 through a pipeline, the shell 11 is fixedly connected to the catalytic combustion module 5, and the shell 11 is fixedly connected to the exhaust gas treatment unit 7.

[0029] The shell 11 is used to fix various components. The exhaust pipe 12 is provided with a valve for discharging qualified gas. The spray module 2 adds relevant chemical substances to treat some waste gases such as benzene waste gas, alcohol waste gas and aldehyde waste gas. The dry filter unit 3 cleans water and untreated dust in the waste gas. A fan is installed in the pipeline between the dry filter unit 3 and the activated carbon filter module 4 to increase the gas flow rate. The activated carbon filter module 4 purifies the waste gas by adsorption. The unqualified waste gas after treatment by the activated carbon filter module 4 is passed to the catalytic combustion module 5 for treatment. The catalytic combustion module 5 can also purify the gas desorbed by the activated carbon filter module 4 through catalytic combustion. A flame arrester is installed at the outlet end of the catalytic combustion module 5 to prevent the flame from entering the activated carbon filter module 4. The heat exchange module 6 cools the high-temperature waste gas coming out of the catalytic combustion module 5 and preheats the waste gas entering the catalytic combustion module 5 to improve the combustion purification efficiency. The waste gas treatment unit 7 adds relevant chemical substances to treat gases such as sulfide and nitrogen oxides generated after the combustion of the waste gas, and dries the gas before passing it into the heat exchange module 6.

[0030] The spray module 2 includes a spray box 201, a swirl fan 202, a baffle 203, a spray air inlet 204, a support column 205, a mounting block 206, a filter plate 207, a liquid pump 208, a clean water tank 209, a transport pipe 210, a nozzle 211, a demisting plate 212 and a spray air outlet 213. The spray box 201 is provided with a spray air inlet 204 on the side, and the spray box 201 is fixedly connected to the clean water tank 209 away from the spray air inlet 204. A mounting block 206 is provided in the spray box 201, and the mounting block 206 is provided with a mounting groove and fixedly connected to the support column 205. The support column 205 is away from the mounting block 206 and the end thereof is fixedly connected to the swirl fan 205. The flow fan 202 is rotatably connected, the spray box 201 is fixedly connected to the baffle 203, the baffle 203 is rotatably connected to the swirl fan 202, a filter plate 207 is provided on the side of the spray box 201 close to the clean water tank 209, a liquid pump 208 is placed in the clean water tank 209, the liquid pump 208 is fixedly connected to the transport pipe 210, the transport pipe 210 is fixedly connected to a plurality of nozzles 211 at one end away from the liquid pump 208, the spray box 201 is fixedly connected to the defogger plate 212 at one end away from the mounting block 206, a spray air outlet 213 is provided at the top of the spray box 201, and the spray air outlet 213 is connected to the dry filter unit 3 pipeline.

[0031] The spray box 201 is welded and fixed to the mounting block 206, and the support column 205 is welded and fixed to the mounting block 206. The exhaust gas enters from the spray air inlet 204. The support column 205 is used to support the swirl fan 202. The swirl fan 202 stirs the air flow evenly so that the exhaust gas is in uniform contact with the water sprayed from the nozzle 211. The baffle 203 allows the exhaust gas to enter only from the swirl fan 202. The filter plate 207 is used to isolate solid impurities such as dust from entering the clean water tank 209 and affecting the operation of the liquid pump 208. The liquid pump 208 sends water into the nozzle 211 through the transport pipe 210. The demisting plate 212 processes the water mist generated by the nozzle 211 to prevent the water mist from entering the dry filter unit 3, thereby affecting the service life of the dry filter unit 3.

[0032] The activated carbon filter module 4 includes a primary adsorption module 41, a secondary adsorption module 42 and an activated carbon adsorption plate 43. The primary adsorption module 41 is connected to the dry filter unit 3 pipeline, the primary adsorption module 41 is connected to the exhaust pipe 12 pipeline, the primary adsorption module 41 is connected to the heat exchange module 6 pipeline, and the primary adsorption module 41 is provided with a plurality of activated carbon adsorption plates 43. The secondary adsorption module 42 is connected to the dry filter unit 3 pipeline, the secondary adsorption module 42 is connected to the exhaust pipe 12 pipeline, the secondary adsorption module 42 is connected to the heat exchange module 6 pipeline, and the secondary adsorption module 42 is provided with a plurality of activated carbon adsorption plates 43.

[0033] The activated carbon adsorption plate 43 is used to adsorb and treat the waste gas. When the activated carbon adsorption plate 43 is desorbing, the primary adsorption module 41 and the secondary adsorption module 42 can be used alternately without affecting the operation of the device.

[0034] The catalytic combustion module 5 includes a combustion box 501, a primary combustion chamber 502, a secondary combustion chamber 503, a connecting pipe 504, a partition 505, a primary feed port 506, a primary combustion air inlet 507, a secondary combustion air outlet 508, a secondary feed port 509, a secondary combustion air inlet 510 and a primary combustion air outlet 511. The combustion box 501 is fixedly connected to the primary combustion chamber 502, and the combustion box 501 is fixedly connected to the secondary combustion chamber 503 at one end away from the primary combustion chamber 502. A partition 505 is arranged in the combustion box 501, and the partition 505 is located between the primary combustion chamber 502 and the secondary combustion chamber 503. A secondary combustion air inlet 510 is arranged on one side of the secondary combustion chamber 503 close to the connecting pipe 504, and a secondary feed port 509 is arranged on the side of the secondary combustion chamber 503 close to the secondary combustion air inlet 510. The secondary feed port 509 passes through the combustion chamber 501. Box 501, the secondary combustion air inlet 510 passes through the combustion box 501 and is fixedly connected to the connecting pipe 504, the primary combustion chamber 502 is provided with a primary combustion air outlet 511 close to the connecting pipe 504, and a primary material inlet 506 is provided at the top of the primary combustion chamber 502, and the primary material inlet 506 passes through the combustion box 501, and the primary combustion air outlet 511 passes through the combustion box 501 and is fixedly connected to the end of the connecting pipe 504 away from the secondary combustion chamber 503, the primary combustion chamber 502 is provided with a primary combustion air inlet 507 away from the primary combustion air outlet 511, and the primary combustion air inlet 507 passes through the combustion box 501 and is connected to the heat exchange module 6 pipeline, the secondary combustion chamber 503 is provided with a secondary combustion air outlet 508 away from the secondary combustion air inlet 510, and the secondary combustion air outlet 508 passes through the combustion box 501 and is connected to the heat exchange module 6 pipeline.

[0035] The partition 505 is welded on the combustion box 501, and the first-level combustion chamber 502 is funnel-shaped, which is convenient for gas mixing, and the gas can move in a cyclone in the first-level combustion chamber 502 and slowly diffuse, so that the gas can be fully burned. The combustion box 501 can be filled with insulation material to reduce the heat loss of the first-level combustion chamber 502 and the second-level combustion chamber 503. The connecting pipe 504 is used to connect the first-level combustion chamber 502 and the second-level combustion chamber 503, and the exhaust gas purification effect is improved by the multi-stage combustion chamber. The first-level feed port 506 is used to introduce oxygen and fuel gas, the first-level combustion air inlet 507 is used to introduce exhaust gas, the first-level combustion air outlet 511 discharges the gas in the first-level combustion chamber 502, the second-level combustion air inlet 510 introduces the gas discharged from the first-level combustion chamber 502, the second-level feed port 509 is used to introduce oxygen and fuel gas, and the second-level combustion air outlet 508 discharges gas.

[0036] The heat exchange module 6 includes a first-level heat exchange unit 61 and a second-level heat exchange unit 62. The first-level heat exchange unit 61 is connected to the second-level heat exchange unit 62 through a pipeline. The first-level heat exchange unit 61 is connected to the first-level adsorption module 41 through a pipeline. The first-level heat exchange unit 61 is connected to the second-level adsorption module 42 through a pipeline. The first-level heat exchange unit 61 is connected to the exhaust pipe 12 through a pipeline. The first-level heat exchange unit 61 is connected to the first-level combustion air intake 507 through a pipeline. The second-level heat exchange unit 62 is connected to the first-level adsorption module 41 through a pipeline. The second-level heat exchange unit 62 is connected to the second-level adsorption module 42 through a pipeline. The second-level heat exchange unit 62 is connected to the exhaust pipe 12 through a pipeline. The second-level heat exchange unit 62 is connected to the exhaust gas treatment unit 7 through a pipeline.

[0037] The first-level heat exchange unit 61 performs heat exchange on the high-temperature gas after combustion with the gas entering the catalytic combustion module 5 to improve energy utilization. The second-level heat exchange unit 62 cools down the gas coming out of the first-level heat exchange unit 61 for a second time and sends it to the exhaust gas treatment unit 7. The low-temperature gas treated by the exhaust gas treatment unit 7 is passed into the second-level heat exchange unit 62 for temperature increase. The heated gas enters the activated carbon filter module 4 to desorb the activated carbon adsorption plate 43.

[0038] The primary adsorption module 41 includes a primary filter box 411, a primary desorption air inlet 412, a primary adsorption air inlet 413, a primary desorption air outlet 414 and a primary adsorption air outlet 415. The primary filter box 411 is fixedly connected to a plurality of activated carbon adsorption plates 43. A primary adsorption air outlet 415 is provided at the bottom of the primary filter box 411, a primary desorption air inlet 412 is provided at one end of the primary filter box 411 close to the primary adsorption air outlet 415, a primary adsorption air inlet 413 is provided at the top of the primary filter box 411, and a primary filter is provided at the bottom of the primary filter box 411. A first-level desorption air outlet 414 is provided near one end of the box 411 near the first-level adsorption air inlet 413. The first-level adsorption air inlet 413 is connected to the dry filter unit 3 pipeline, the first-level desorption air outlet 414 is connected to the first-level heat exchange unit 61 pipeline, the first-level adsorption air outlet 415 is connected to the exhaust pipe 12 pipeline, the first-level adsorption air outlet 415 is connected to the first-level heat exchange unit 61 pipeline, the first-level desorption air inlet 412 is connected to the exhaust pipe 12 pipeline, and the first-level desorption air inlet 412 is connected to the second-level heat exchange unit 62 pipeline.

[0039] The first-level filter box 411 is used to fix various components, the first-level adsorption air inlet 413 is used to allow waste gas to pass through, the first-level adsorption air outlet 415 sends the qualified waste gas after treatment into the exhaust pipe 12, and the unqualified waste gas is sent to the first-level heat exchange unit 61, and a check valve is installed on the pipeline of the first-level adsorption air outlet 415 to prevent gas from entering through the first-level adsorption air outlet 415. During adsorption, the valves of the first-level desorption air inlet 412 and the first-level desorption air outlet 414 are closed, and the valves of the first-level adsorption air inlet 413 and the first-level adsorption air outlet 415 are opened. During desorption, the valves of the first-level adsorption air inlet 413 and the first-level adsorption air outlet 415 are closed, and the valves of the first-level desorption air inlet 412 and the first-level desorption air outlet 414 are opened.

[0040] The secondary adsorption module 42 includes a secondary filter box 421, a secondary desorption air inlet 422, a secondary adsorption air inlet 423, a secondary desorption air outlet 424 and a secondary adsorption air outlet 425. The secondary filter box 421 is fixedly connected to a plurality of activated carbon adsorption plates 43. A secondary adsorption air outlet 425 is provided at the bottom of the secondary filter box 421, a secondary desorption air inlet 422 is provided at one end of the secondary filter box 421 close to the secondary adsorption air outlet 425, a secondary adsorption air inlet 423 is provided at the top of the secondary filter box 421, and a secondary desorption air outlet 424 is provided at the bottom of the secondary filter box 421. A secondary desorption air outlet 424 is provided at one end of the filter box 421 near the secondary adsorption air inlet 423, the secondary adsorption air inlet 423 is connected to the dry filter unit 3 pipeline, the secondary desorption air outlet 424 is connected to the primary heat exchange unit 61 pipeline, the secondary adsorption air outlet 425 is connected to the exhaust pipe 12 pipeline, the secondary adsorption air outlet 425 is connected to the primary heat exchange unit 61 pipeline, the secondary desorption air inlet 422 is connected to the exhaust pipe 12 pipeline, and the secondary desorption air inlet 422 is connected to the secondary heat exchange unit 62 pipeline.

[0041] The secondary filter box 421 is used to fix various components, the secondary adsorption air inlet 423 allows exhaust gas to enter, the secondary adsorption air outlet 425 sends the qualified exhaust gas after treatment into the exhaust pipe 12, and the unqualified exhaust gas is sent to the primary heat exchange unit 61. A check valve is installed in the pipeline of the secondary adsorption air outlet 425 to prevent gas from entering through the secondary adsorption air outlet 425. The adsorption and desorption steps are the same as those of the primary adsorption module 41.

[0042] The first-level heat exchange unit 61 is provided with a first-level main air inlet 611, a first-level main air outlet 612, a first-level auxiliary air inlet 613 and a first-level auxiliary air outlet 614. One end of the first-level heat exchange unit 61 is provided with a first-level main air inlet 611, the end of the first-level heat exchange unit 61 away from the first-level main air inlet 611 is provided with a first-level main air outlet 612, the end of the first-level heat exchange unit 61 close to the first-level main air outlet 612 is provided with a first-level auxiliary air inlet 613, the end of the first-level heat exchange unit 61 close to the first-level main air inlet 611 is provided with a first-level auxiliary air outlet 614. The first-level auxiliary air inlet 613 is connected to the first-level adsorption air outlet 415 pipeline, the first-level auxiliary air inlet 613 is connected to the first-level desorption air outlet 414 pipeline, the first-level auxiliary air inlet 613 is connected to the second-level adsorption air outlet 425 pipeline, the first-level auxiliary air inlet 613 is connected to the second-level desorption air outlet 424 pipeline, the first-level auxiliary air outlet 614 is connected to the first-level combustion air inlet 507 pipeline, the first-level main air inlet 611 is connected to the second-level combustion air outlet 508 pipeline, and the first-level main air outlet 612 is connected to the second-level heat exchange unit 62 pipeline.

[0043] The first-level main air inlet 611 passes high-temperature gas, and the first-level adsorption air outlet 415 and the first-level desorption air outlet 414 are connected to the first-level auxiliary air inlet 613 through a pipe with a valve. When the exhaust gas treated by the first-level adsorption module 41 and the second-level adsorption module 42 is unqualified, the valve is opened to subject the exhaust gas to catalytic combustion treatment. The second-level adsorption air outlet 425 and the second-level desorption air outlet 424 are connected to the first-level auxiliary air inlet 613 through a pipe with a check valve, and the first-level auxiliary air outlet 614 is connected to the first-level combustion air inlet 507 through a pipe with a fan to increase the gas flow rate.

[0044] The secondary heat exchange unit 62 is provided with a secondary main air inlet 621, a secondary main air outlet 622, a secondary auxiliary air outlet 623 and a secondary auxiliary air inlet 624. One end of the secondary heat exchange unit 62 is provided with a secondary main air inlet 621, the end of the secondary heat exchange unit 62 away from the secondary main air inlet 621 is provided with a secondary main air outlet 622, the end of the secondary heat exchange unit 62 close to the secondary main air outlet 622 is provided with a secondary auxiliary air outlet 623, and the secondary heat exchange unit 62 close to the secondary main air inlet 62 A secondary secondary air inlet 624 is provided at one end, the secondary main air inlet 621 is connected to the primary main air outlet 612 pipeline, the secondary main air outlet 622 is connected to the exhaust gas treatment unit 7 pipeline, the secondary secondary air inlet 624 is connected to the exhaust gas treatment unit 7 pipeline, the secondary secondary air outlet 623 is connected to the exhaust pipe 12 pipeline, the secondary secondary air outlet 623 is connected to the primary desorption air inlet 412 pipeline, and the secondary secondary air outlet 623 is connected to the secondary desorption air inlet 422 pipeline.

[0045] A fan is installed in the pipeline of the first-level main air outlet 612 and the second-level main air inlet 621 to increase the flow rate of the exhaust gas. The second-level main air outlet 622 sends the exhaust gas to the exhaust gas treatment unit 7 for purification. A fan is installed in the pipeline at the second-level auxiliary air outlet 623 to increase the gas flow rate. During adsorption, the valve of the exhaust pipe 12 is opened to discharge the exhaust gas. During desorption, the valve of the exhaust pipe 12 is closed and the gas circulates internally. The treated low-temperature gas is introduced into the second-level auxiliary air inlet 624.

[0046] The working principle of the present invention is as follows: the organic waste gas is pre-treated by a spray module and a dry filter unit, and then the organic waste gas is purified by an activated carbon filter module. The heat exchange module preheats the gas entering the catalytic combustion module and cools the gas discharged from the catalytic combustion module. The organic waste gas is then catalytically burned by the catalytic combustion module, and the harmful gas generated after combustion is treated by the waste gas treatment unit (7). When the activated carbon is desorbed, the heat exchange module (6) passes the treated gas into the activated carbon filter module to desorb the activated carbon, and the catalytic combustion module treats the desorbed gas.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A catalytic purification device for organic waste gas with a multi-stage airflow circulation function, characterized by: The invention comprises a housing (11), an exhaust pipe (12), a spray module (2), a dry filter unit (3), an activated carbon filter module (4), a catalytic combustion module (5), a heat exchange module (6) and an exhaust gas treatment unit (7), wherein the housing (11) is provided with an exhaust pipe (12), the housing (11) is fixedly connected to the spray module (2), the spray module (2) is connected to the dry filter unit (3) through a pipeline, the dry filter unit (3) is connected to the activated carbon filter module (4) through a pipeline, and the activated carbon filter module (4) is connected to the housing (11). ) are fixedly connected, the activated carbon filter module (4) is in communication with the exhaust pipe (12) pipeline, the activated carbon filter module (4) is in communication with the heat exchange module (6) pipeline, the heat exchange module (6) is fixedly connected to the housing (11), the heat exchange module (6) is in communication with the catalytic combustion module (5) pipeline, the heat exchange module (6) is in communication with the exhaust gas treatment unit (7) pipeline, the heat exchange module (6) is in communication with the exhaust pipe (12) pipeline, the housing (11) is fixedly connected to the catalytic combustion module (5), and the housing (11) is fixedly connected to the exhaust gas treatment unit (7); The spray module (2) comprises a spray box (201), a swirl fan (202), a baffle (203), a spray air inlet (204), a support column (205), a mounting block (206), a filter plate (207), a liquid pump (208), a clean water tank (209), a transport pipe (210), a nozzle (211), a demisting plate (212) and a spray air outlet (213). The spray box (201) is provided with a spray air inlet (204) on a side thereof, and the spray box (201) is fixedly connected to the clean water tank (209) on a side thereof away from the spray air inlet (204). A mounting block (206) is provided in the spray box (201), and the mounting block (206) is provided with a mounting groove and fixedly connected to the support column (205). The support column (205) is provided with a mounting groove on a side thereof away from the mounting block (206). The end is rotatably connected to the swirl fan (202), the spray box (201) is fixedly connected to the baffle (203), the baffle (203) is rotatably connected to the swirl fan (202), a filter plate (207) is provided on one side of the spray box (201) close to the clean water tank (209), a liquid pump (208) is placed in the clean water tank (209), the liquid pump (208) is fixedly connected to the transport pipe (210), the transport pipe (210) is fixedly connected to a plurality of nozzles (211) at one end away from the liquid pump (208), the spray box (201) is fixedly connected to the demisting plate (212) at one end away from the mounting block (206), a spray air outlet (213) is provided at the top of the spray box (201), and the spray air outlet (213) is connected to the dry filter unit (3) pipeline; The activated carbon filter module (4) comprises a primary adsorption module (41), a secondary adsorption module (42) and an activated carbon adsorption plate (43); the activated carbon adsorption plate (43) is used to adsorb and treat the exhaust gas; when the activated carbon adsorption plate (43) is desorbed, the primary adsorption module (41) and the secondary adsorption module (42) can be used alternately without affecting the operation of the device; The first-stage adsorption module (41) includes a first-stage adsorption outlet (415), and the first-stage adsorption outlet (415) sends the treated and qualified waste gas into the exhaust pipe (12), and sends the unqualified waste gas into the first-stage heat exchange unit (61); The secondary adsorption module (42) includes a secondary adsorption outlet (425), and the secondary adsorption outlet (425) sends the treated and qualified waste gas into the exhaust pipe (12), and sends the unqualified waste gas into the primary heat exchange unit (61); The heat exchange module (6) includes a first-level heat exchange unit (61) and a second-level heat exchange unit (62), wherein the first-level heat exchange unit (61) is connected to the second-level heat exchange unit (62) through a pipeline, the first-level heat exchange unit (61) is connected to the first-level adsorption module (41) through a pipeline, the first-level heat exchange unit (61) is connected to the second-level adsorption module (42) through a pipeline, the first-level heat exchange unit (61) is connected to the exhaust pipe (12) through a pipeline, the first-level heat exchange unit (61) is connected to the first-level combustion air inlet (507) through a pipeline, the second-level heat exchange unit (62) is connected to the first-level adsorption module (41) through a pipeline, the second-level heat exchange unit (62) is connected to the second-level adsorption module (42) through a pipeline, the second-level heat exchange unit (62) is connected to the exhaust pipe (12) through a pipeline, and the second-level heat exchange unit (62) is connected to the exhaust gas treatment unit (7) through a pipeline.

2. The organic waste gas catalytic purification device with multi-stage airflow circulation function according to claim 1 is characterized in that: The activated carbon filter module (4) comprises a primary adsorption module (41), a secondary adsorption module (42) and an activated carbon adsorption plate (43); the primary adsorption module (41) is connected to a dry filter unit (3) pipeline, the primary adsorption module (41) is connected to an exhaust pipe (12) pipeline, the primary adsorption module (41) is connected to a heat exchange module (6) pipeline, the primary adsorption module (41) is provided with a plurality of activated carbon adsorption plates (43); the secondary adsorption module (42) is connected to a dry filter unit (3) pipeline, the secondary adsorption module (42) is connected to an exhaust pipe (12) pipeline, the secondary adsorption module (42) is connected to a heat exchange module (6) pipeline, and the secondary adsorption module (42) is provided with a plurality of activated carbon adsorption plates (43).

3. The organic waste gas catalytic purification device with multi-stage airflow circulation function according to claim 2 is characterized by: The catalytic combustion module (5) comprises a combustion box (501), a primary combustion chamber (502), a secondary combustion chamber (503), a connecting pipe (504), a partition (505), a primary feed port (506), a primary combustion air inlet (507), a secondary combustion air outlet (508), a secondary feed port (509), a secondary combustion air inlet (510) and a primary combustion air outlet (511), wherein the combustion box (501) is fixedly connected to the primary combustion chamber (502), and the combustion box (501) is away from the primary combustion chamber (502). One end of the primary combustion chamber (502) is fixedly connected to the secondary combustion chamber (503), a partition (505) is provided in the combustion box (501), the partition (505) is located between the primary combustion chamber (502) and the secondary combustion chamber (503), a secondary combustion air inlet (510) is provided on one side of the secondary combustion chamber (503) close to the connecting pipe (504), a secondary material inlet (509) is provided on one side of the secondary combustion chamber (503) close to the secondary combustion air inlet (510), and the secondary material inlet (509) passes through The combustion box (501) is provided with a secondary combustion air inlet (510) passing through the combustion box (501) and fixedly connected to the connecting pipe (504). The primary combustion chamber (502) is provided with a primary combustion air outlet (511) on one side close to the connecting pipe (504). The top of the primary combustion chamber (502) is provided with a primary material inlet (506). The primary material inlet (506) passes through the combustion box (501). The primary combustion air outlet (511) passes through the combustion box (501) and the connecting pipe (504) away from the secondary combustion chamber. The first combustion chamber (502) is fixedly connected at one end thereof, a first combustion air inlet (507) is provided on one side away from the first combustion air outlet (511), and the first combustion air inlet (507) passes through the combustion box (501) and is connected to the heat exchange module (6) pipeline, and the second combustion chamber (503) is fixedly connected at one end thereof, a second combustion air outlet (508) is provided on one side away from the second combustion air inlet (510), and the second combustion air outlet (508) passes through the combustion box (501) and is connected to the heat exchange module (6) pipeline.

4. The catalytic purification device for organic waste gas with multi-stage airflow circulation function according to claim 3 is characterized by: The first-stage adsorption module (41) comprises a first-stage filter box (411), a first-stage desorption air inlet (412), a first-stage adsorption air inlet (413), a first-stage desorption air outlet (414) and a first-stage adsorption air outlet (415). The first-stage filter box (411) is fixedly connected to a plurality of activated carbon adsorption plates (43). The first-stage adsorption air outlet (415) is provided at the bottom of the first-stage filter box (411). The first-stage desorption air inlet (412) is provided at one end of the first-stage filter box (411) close to the first-stage adsorption air outlet (415). The first-stage adsorption air inlet (413) is provided at the top of the first-stage filter box (411). A first-stage desorption air outlet (414) is provided on one end of the box (411) near the first-stage adsorption air inlet (413), the first-stage adsorption air inlet (413) is connected to the dry filter unit (3) pipeline, the first-stage desorption air outlet (414) is connected to the first-stage heat exchange unit (61) pipeline, the first-stage adsorption air outlet (415) is connected to the exhaust pipe (12) pipeline, the first-stage adsorption air outlet (415) is connected to the first-stage heat exchange unit (61) pipeline, the first-stage desorption air inlet (412) is connected to the exhaust pipe (12) pipeline, and the first-stage desorption air inlet (412) is connected to the second-stage heat exchange unit (62) pipeline.

5. The organic waste gas catalytic purification device with multi-stage airflow circulation function according to claim 4 is characterized in that: The secondary adsorption module (42) includes a secondary filter box (421), a secondary desorption air inlet (422), a secondary adsorption air inlet (423), a secondary desorption air outlet (424) and a secondary adsorption air outlet (425). The secondary filter box (421) is fixedly connected to a plurality of activated carbon adsorption plates (43). The secondary adsorption air outlet (425) is provided at the bottom of the secondary filter box (421). A secondary desorption air inlet (422) is provided at one end of the secondary filter box (421) close to the secondary adsorption air outlet (425). A secondary adsorption air inlet (423) is provided at the top of the secondary filter box (421). A secondary desorption air outlet (424) is provided at one end of the filter box (421) near the secondary adsorption air inlet (423), the secondary adsorption air inlet (423) is connected to the dry filter unit (3) pipeline, the secondary desorption air outlet (424) is connected to the primary heat exchange unit (61) pipeline, the secondary adsorption air outlet (425) is connected to the exhaust pipe (12) pipeline, the secondary adsorption air outlet (425) is connected to the primary heat exchange unit (61) pipeline, the secondary desorption air inlet (422) is connected to the exhaust pipe (12) pipeline, and the secondary desorption air inlet (422) is connected to the secondary heat exchange unit (62) pipeline.

6. The organic waste gas catalytic purification device with multi-stage airflow circulation function according to claim 5 is characterized by: The first-stage heat exchange unit (61) is provided with a first-stage main air inlet (611), a first-stage main air outlet (612), a first-stage auxiliary air inlet (613) and a first-stage auxiliary air outlet (614). One end of the first-stage heat exchange unit (61) is provided with a first-stage main air inlet (611), an end of the first-stage heat exchange unit (61) away from the first-stage main air inlet (611) is provided with a first-stage main air outlet (612), an end of the first-stage heat exchange unit (61) close to the first-stage main air outlet (612) is provided with a first-stage auxiliary air inlet (613), and an end of the first-stage heat exchange unit (61) close to the first-stage main air inlet (611) is provided with a first-stage auxiliary air outlet (614). The first-level auxiliary air inlet (613) is connected to the first-level adsorption air outlet (415) pipeline, the first-level auxiliary air inlet (613) is connected to the first-level desorption air outlet (414) pipeline, the first-level auxiliary air inlet (613) is connected to the second-level adsorption air outlet (425) pipeline, the first-level auxiliary air inlet (613) is connected to the second-level desorption air outlet (424) pipeline, the first-level auxiliary air outlet (614) is connected to the first-level combustion air inlet (507) pipeline, the first-level main air inlet (611) is connected to the second-level combustion air outlet (508) pipeline, and the first-level main air outlet (612) is connected to the second-level heat exchange unit (62) pipeline.

7. The catalytic purification device for organic waste gas with multi-stage airflow circulation function according to claim 6 is characterized in that: The secondary heat exchange unit (62) is provided with a secondary main air inlet (621), a secondary main air outlet (622), a secondary auxiliary air outlet (623) and a secondary auxiliary air inlet (624). One end of the secondary heat exchange unit (62) is provided with a secondary main air inlet (621), an end of the secondary heat exchange unit (62) away from the secondary main air inlet (621) is provided with a secondary main air outlet (622), an end of the secondary heat exchange unit (62) close to the secondary main air outlet (622) is provided with a secondary auxiliary air outlet (623), and the secondary heat exchange unit (62) close to the secondary main air inlet (621) is provided with a secondary auxiliary air outlet (623). 21) is provided with a secondary auxiliary air inlet (624) at one end, the secondary main air inlet (621) is connected to the primary main air outlet (612) pipeline, the secondary main air outlet (622) is connected to the exhaust gas treatment unit (7) pipeline, the secondary auxiliary air inlet (624) is connected to the exhaust gas treatment unit (7) pipeline, the secondary auxiliary air outlet (623) is connected to the exhaust pipe (12) pipeline, the secondary auxiliary air outlet (623) is connected to the primary desorption air inlet (412) pipeline, and the secondary auxiliary air outlet (623) is connected to the secondary desorption air inlet (422) pipeline.

Images