CN113357655A - Treatment device and treatment method for automobile body drying waste gas - Google Patents
Treatment device and treatment method for automobile body drying waste gas Download PDFInfo
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- CN113357655A CN113357655A CN202110775619.XA CN202110775619A CN113357655A CN 113357655 A CN113357655 A CN 113357655A CN 202110775619 A CN202110775619 A CN 202110775619A CN 113357655 A CN113357655 A CN 113357655A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
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- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a treatment device and a treatment method for automobile body drying waste gas, wherein a waste gas inlet pipeline and an air inlet pipeline are connected in parallel to be connected with an input end of a system fan, an output end of the system fan is communicated with an input end of a heat exchanger through a first conveying pipeline, a heating chamber and a catalysis chamber are arranged in a waste gas treatment box, an electric heater is fixedly arranged in the heating chamber, a catalytic combustion bed is fixedly arranged in the catalysis chamber, an output end of the heat exchanger is communicated with the heating chamber through a second conveying pipeline, one end of a backflow pipeline is communicated with the catalysis chamber, the other end of the backflow pipeline penetrates through the heat exchanger and is communicated with a chimney, and the first conveying pipeline is communicated with the backflow pipeline through a third conveying pipeline. Utilize the temperature in the temperature monitoring device real-time supervision catalysis room, when the temperature in the catalysis room takes place too high, the PLC controller control reduces pneumatic valve's opening size, and then reduces the waste gas air input for the decomposition speed of catalytic combustion bed remains stable, thereby reaches the effect of dynamic adjustment catalysis room temperature.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a treatment device and a treatment method for automobile body drying waste gas.
Background
With the continuous improvement of the national requirements on environmental protection, environmental protection and energy conservation become the development trend of automobile production. At present, automobile body production enterprises mainly use cold-rolled steel coils as raw materials to produce automobile bodies through machining, forming, welding and coating processes, and paint and diluent containing organic solvents such as toluene, xylene, esters and alcohols are used in the coating process, so that a large amount of waste gas containing volatile organic matters can be generated in the related production processes of paint spraying, leveling and drying.
Usually, a waste gas treatment device is installed in a drying workshop, and a catalytic combustion bed is utilized to decompose organic matters in waste gas into CO2And H2O, because the stoving production process is continuous operation, when a large amount of automobile body concentrated the stoving, can produce the organic waste gas of higher concentration in the short time, a large amount of organic waste gas decomposes in the catalytic combustion bed, releases excessive heat, and then leads to the temperature in the catalysis room to exceed safe range, must shut down and wait to cool off the back and just can continue work for waste gas can not be handled in time.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to solve the technical problem of providing a treatment device and a treatment method for automobile body drying waste gas, wherein a temperature monitoring device is used for monitoring the temperature in a catalytic chamber in real time, and when the temperature in the catalytic chamber is overhigh, a PLC controller controls and reduces the opening size of a pneumatic valve so as to reduce the waste gas air inflow and keep the decomposition speed of a catalytic combustion bed stable, thereby achieving the effect of dynamically adjusting the temperature of the catalytic chamber.
In order to achieve the purpose, the invention adopts the following technical scheme: a treatment device for drying waste gas of an automobile body comprises a waste gas inlet pipeline, an air inlet pipeline, a system fan, a heat exchanger, a waste gas treatment box, a backflow pipeline, a chimney, a PLC (programmable logic controller), a first conveying pipeline, a second conveying pipeline, a third conveying pipeline, a first pneumatic valve, a second pneumatic valve, a third pneumatic valve, a fourth pneumatic valve, an electric heater and a catalytic combustion bed, wherein the waste gas inlet pipeline and the air inlet pipeline are connected in parallel to the input end of the system fan, the output end of the system fan is communicated with the input end of the heat exchanger through the first conveying pipeline, a heating chamber and a catalytic chamber are arranged in the waste gas treatment box, the heating chamber is communicated with the catalytic chamber, the electric heater is fixedly arranged in the heating chamber, the catalytic combustion bed is fixedly arranged in the catalytic chamber, the output end of the heat exchanger is communicated with the heating chamber through the second conveying pipeline, one end of the backflow pipeline is communicated with the catalytic chamber, the other end of return line runs through the heat exchanger and communicates with the chimney, first pipeline passes through third pipeline and return line intercommunication, first pneumatic valve sets firmly in air intake duct, the second pneumatic valve sets firmly in first pipeline, the third pneumatic valve sets firmly in third pipeline, the fourth pneumatic valve sets firmly in waste gas intake duct, the PLC controller sets firmly in one side of exhaust-gas treatment case, first pneumatic valve, the second pneumatic valve, the third pneumatic valve, fourth pneumatic valve and electric heater 16 all with PLC controller electric connection, still include temperature monitoring module, temperature monitoring module and PLC controller electric connection.
In a preferred technical scheme of the invention, a first flame arrester is fixedly arranged in the first conveying pipeline, a second flame arrester is fixedly arranged in the return pipeline, and the second flame arrester is positioned between the heat exchanger and the chimney.
In a preferred technical scheme of the invention, the heat exchanger comprises a shell, a concentration sensor, a push plate, a compression spring, a spiral pipe, a control module, an air bag and a first connecting rod, wherein a heat exchange cavity and an air storage cavity are formed in the shell, a sliding chute is formed in the top of the air storage cavity, the heat exchange cavity is communicated with the sliding chute through a first through hole, an air outlet communicated with the heat exchange cavity is formed in the top of the shell, one end of a second conveying pipeline is communicated with the air outlet, an air inlet communicated with the heat exchange cavity is formed in the bottom of the shell, one end of the first conveying pipeline is communicated with the air inlet, the spiral pipe is fixedly arranged in the heat exchange cavity, the concentration sensor is fixedly arranged in the air outlet, the control cavity is formed between the heat exchange cavity and the air storage cavity, the control module is fixedly arranged in the control cavity, the heat exchange cavity is communicated with the control cavity through a second through hole, one end of the spiral pipe is communicated with the second through hole, and the other end of the spiral pipe is communicated with the return pipeline, the control chamber is communicated with the side wall of the gas storage chamber through a third through hole, an exhaust pipeline communicated with the control chamber is further arranged on one side of the shell, the exhaust pipeline is communicated with the chimney through a backflow pipeline, the air inlet hole is communicated with the bottom of the gas storage chamber through a fourth through hole, the air bag is fixedly arranged at the bottom of the gas storage chamber and is communicated with the fourth through hole, the push plate is slidably arranged in the chute and is fixedly connected with the top of the air bag through a first connecting rod, and the top of the push plate is fixedly provided with a compression spring and is fixedly connected with the top wall of the chute through the compression spring.
In a preferred technical scheme of the invention, the control module comprises a driving motor, a first rotating gear, a sliding block, a door plate, baffles, a piston, a rack, a mounting rack and a water absorption sponge, wherein more than two baffles are fixedly arranged on the inner wall of the control cavity at staggered intervals, a water collecting tank is arranged at the bottom of the control cavity, the piston is slidably arranged in the exhaust pipeline and is fixedly arranged at the bottom end of the rack, the mounting rack is fixedly arranged on the side wall of the control cavity, the sliding block is slidably arranged on the mounting rack, the sliding block is fixedly arranged at the top end of the rack, the bottom end of the water absorption sponge is fixedly arranged at the top of the sliding block, the top end of the water absorption sponge is fixedly arranged on the mounting rack, the driving motor is embedded in the side wall of the control cavity, the first rotating gear is fixedly arranged at the power output end of the driving motor, the first rotating gear is meshed with the rack, and the driving motor is electrically connected with the concentration sensor.
In a preferred technical solution of the present invention, the temperature monitoring module includes a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor, the first temperature sensor is fixedly disposed in the first conveying pipe, the second temperature sensor is fixedly disposed in the return pipe, the third temperature sensor is fixedly disposed in the catalyst chamber, and the fourth temperature sensor is fixedly disposed in the heating chamber.
In a preferred embodiment of the present invention, two or more groups of the electric heaters are provided.
The invention also provides a treatment method for the drying waste gas of the automobile body, which comprises the following steps:
s1, opening the first pneumatic valve and the second pneumatic valve, and closing the third pneumatic regulating valve and the fourth pneumatic regulating valve simultaneously;
s2, starting a system fan and an electric heater, enabling outside air to enter a heating chamber through a first pneumatic adjusting valve, the system fan, a second pneumatic valve and a heat exchanger in sequence, heating the air by the electric heater, folding heated air obtained by heating back to the heat exchanger through a catalytic chamber and a backflow pipeline, and heating the inside of the heat exchanger until the temperatures in the heat exchanger, the heating chamber and the catalytic chamber reach set values;
s3, opening a fourth pneumatic valve, closing the first pneumatic valve, enabling organic waste gas to sequentially pass through the fourth pneumatic valve, a system fan and a second pneumatic valve to enter a heat exchanger, completing preheating in the heat exchanger, enabling the preheated organic waste gas to enter a heating chamber, continuously heating by an electric heater to increase the temperature, enabling the high-temperature organic waste gas to enter a catalytic chamber, and catalytically decomposing the high-temperature organic waste gas into CO2 and H2O by a catalytic combustion bed;
s4, high-temperature flue gas generated by catalytic decomposition is returned to the heat exchanger through a return pipeline to exchange heat with the organic waste gas, and is discharged from a chimney after being cooled;
and S5, after all organic waste gas is treated, opening the first pneumatic valve and the second pneumatic valve, closing the third pneumatic valve and the fourth pneumatic valve, starting the system fan and closing the electric heater at the moment, so that outside cold air enters the system, and the cooling process is realized.
In a better technical scheme of the invention, the temperature change gradients in the heating chamber and the catalytic chamber are monitored in real time through the third temperature sensor and the fourth temperature sensor, and the PLC is used for controlling and adjusting the sizes of the openings of the first pneumatic valve, the second pneumatic valve, the third pneumatic valve and the fourth pneumatic valve and the number of switch sets of the electric heater, so that the dynamic adjustment of the temperature is realized.
In a better technical scheme of the invention, when the temperature exceeds a certain temperature gradient, the PLC controls the third pneumatic valve to be opened, and simultaneously the opening size of the second pneumatic valve is reduced, so that most of organic waste gas is directly discharged from a chimney.
The invention has the beneficial effects that:
1. the invention provides a treatment device and a treatment method for automobile body drying waste gas, which utilize a temperature monitoring device to monitor the temperature in a catalytic chamber in real time, when the temperature in the catalytic chamber is overhigh, a PLC controller controls and reduces the opening size of a pneumatic valve, thereby reducing the waste gas air input, keeping the decomposition speed of a catalytic combustion bed stable, and achieving the effect of dynamically adjusting the temperature of the catalytic chamber.
2. Utilize concentration sensor monitoring heat transfer intracavity organic waste gas concentration, when waste gas concentration is too high, control module starts, and the control inhales the waste gas of heat transfer intracavity to the gasbag in, introduces the heat transfer chamber with the clean gas after decomposing simultaneously, dilutes waste gas to avoid waste gas concentration to rise suddenly, make the waste gas decomposition in the catalysis chamber too much, and then cause the condition of catalysis chamber temperature rising to take place.
3. The concentration of the waste gas entering the catalytic chamber is controlled to be in a lower state through the heat exchanger, so that the catalytic combustion bed can be prevented from not decomposing organic waste gas, volatile organic compounds can be discharged out of a chimney along with tail gas, the tail gas which is not completely decomposed can be circulated to the catalytic chamber again in the circulating process to be subjected to catalytic decomposition, and the waste gas is treated more cleanly and thoroughly.
Drawings
FIG. 1 is a structural diagram of an abatement device for drying exhaust gas from an automobile body according to an embodiment of the present invention;
FIG. 2 is a block diagram of a heat exchanger;
FIG. 3 is an enlarged schematic view at A in FIG. 2;
fig. 4 is a circuit wiring diagram of the present invention.
In the figure:
1. an exhaust gas inlet conduit; 2. an air intake duct; 3. a system fan; 4. a heat exchanger; 401. a housing; 402. a concentration sensor; 403. pushing the plate; 404. a compression spring; 405. a spiral tube; 406. a control module; 4061. a drive motor; 4062. a first rotating gear; 4063. a slider; 4064. a baffle plate; 4065. a piston; 4066. a rack; 4067. a mounting frame; 4068. a water collection tank; 4069. a water-absorbing sponge; 407. an air bag; 408. a heat exchange cavity; 409. a gas storage cavity; 410. a first through hole; 411. a second through hole; 412. a third through hole; 413. a fourth via hole; 414. an air inlet; 415. an air outlet; 416. a control chamber; 417. an exhaust duct; 418. a first link; 419. a chute; 5. a waste gas treatment tank; 501. a heating chamber; 502. a catalyst chamber; 6. a return line; 7. a chimney; 8. a PLC controller; 9. a first delivery conduit; 10. a second delivery conduit; 11. a third delivery conduit; 12. a first pneumatic valve; 13. a second pneumatic valve; 14. a third pneumatic valve; 15. a fourth pneumatic valve; 16. an electric heater; 17. a catalytic combustion bed; 18. a first flame arrestor; 19. a temperature monitoring module; 1901. a first temperature sensor; 1902. a second temperature sensor; 1903. a third temperature sensor; 1904. a fourth temperature sensor; 20. a second flame arrestor.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-4, in the embodiment, there is provided an abatement device for drying exhaust gas of an automobile body, comprising an exhaust gas inlet pipe 1, an air inlet pipe 2, a system fan 3, a heat exchanger 4, an exhaust gas treatment tank 5, a return pipe 6, a chimney 7, a PLC controller 8, a first delivery pipe 9, a second delivery pipe 10, a third delivery pipe 11, a first pneumatic valve 12, a second pneumatic valve 13, a third pneumatic valve 14, a fourth pneumatic valve 15, an electric heater 16 and a catalytic combustion bed 17, wherein the exhaust gas inlet pipe 1 and the air inlet pipe 2 are connected in parallel to an input end of the system fan 3, an output end of the system fan 3 is communicated with the input end of the heat exchanger 4 through the first delivery pipe 9, a heating chamber 501 and a catalytic chamber 502 are provided in the exhaust gas treatment tank 5, the heating chamber 501 is communicated with the catalytic chamber 502, the electric heater 16 is fixedly provided in the heating chamber 501, the catalytic combustion bed 17 is fixedly arranged in the catalytic chamber 502, the output end of the heat exchanger 4 is communicated with the heating chamber 501 through a second conveying pipeline 10, one end of the backflow pipeline 6 is communicated with the catalytic chamber 502, the other end of the backflow pipeline 6 penetrates through the heat exchanger 4 and is communicated with the chimney 7, the first conveying pipeline 9 is communicated with the backflow pipeline 6 through a third conveying pipeline 11, the first pneumatic valve 12 is fixedly arranged in the air inlet pipeline 2, the second pneumatic valve 13 is fixedly arranged in the first conveying pipeline 9, the third pneumatic valve 14 is fixedly arranged in the third conveying pipeline 11, the fourth pneumatic valve 15 is fixedly arranged in the waste gas inlet pipeline 1, the PLC controller 8 is fixedly arranged at one side of the waste gas treatment box 5, the first pneumatic valve 12, the second pneumatic valve 13, the third pneumatic valve 14, the fourth pneumatic valve 15 and the electric heater 16 are electrically connected with the PLC controller 8, and further comprises a temperature monitoring module 19, the temperature monitoring module 19 is electrically connected with the PLC controller 8.
In this embodiment, the model of the PLC controller 12 is UN2070, the openings of the first pneumatic valve 12, the second pneumatic valve 13, the third pneumatic valve 14 and the fourth pneumatic valve 15 are all adjustable structures, before the device is opened for operation, the interior of the device needs to be preheated in advance, the first pneumatic valve 12 and the second pneumatic valve 13 are opened, the third pneumatic valve 14 and the fourth pneumatic valve 15 are closed to close the exhaust gas inlet pipe 1, at this time, under the action of the system fan 3, the external air sequentially passes through the air inlet pipe 2, the first delivery pipe 9, the heat exchanger 4, the second delivery pipe 10, the heating chamber 501, the catalytic chamber 502, the return pipe 6 and the heat exchanger 4 to the chimney 7 and is exhausted by the chimney 7, the temperature monitoring module 19 monitors the temperatures in the heating chamber 501 and the catalytic chamber 502 in real time, and controls the electric heater 16 to operate through the PLC controller 8, the electric heater 16 heats the air in the heating chamber 501, in the gas circulation process, the internal temperatures of the catalytic chamber 502 and the heat exchanger 4 are heated to a set temperature gradient, so that the equipment can quickly enter an optimal working state, and the condition that the organic waste gas cannot be completely decomposed due to the low internal temperature of the catalytic chamber 82 in the initial operation stage of the device can be avoided; when the temperature reaches the set temperature gradient, the first pneumatic valve 12 is controlled to be closed, the fourth pneumatic valve 15 is opened simultaneously, the drying waste gas enters the heat exchanger 4 through the waste gas inlet pipeline 1 and the first conveying pipeline 9, the waste gas can be preheated through the heat exchanger 4, then the drying waste gas enters the heating chamber 502 through the second conveying pipeline 10, the temperature of the waste gas is heated to the set temperature through the electric heater 16, the heating speed of the waste gas is improved, the heated drying waste gas enters the catalytic cavity 502, and volatile organic compounds in the waste gas are decomposed into CO under the action of the catalytic combustion bed 172And H2O, release a large amount of heats simultaneously, high temperature tail gas after combustion processing turns back to in the heater 4 through backflow pipeline 6, utilizes the waste heat to dry waste gas heating, then discharges to chimney 7 by backflow pipeline 6 and draws high the emission, helps improving the utilization ratio of energy, has practiced thrift the energy. In addition, when the temperature in heating chamber 501 or catalysis chamber 502 reaches a certain temperature gradient, for preventing the safety problem, PLC controller 8 control reduces the opening size of second pneumatic governing valve 13 this moment, reduce the air input of organic waste gas in heat exchanger 4, the third pneumatic governing valve 14 is opened in the simultaneous control, make most organic waste gas by the direct discharge of system fan 3's second export to chimney 7 in, thereby can guarantee that the device lasts, safety, steady operation, the shock resistance of device has been improved, the device simple structure, area is less, the energy consumption is low and can not increase secondary pollution, can reduce the running cost of equipment, has higher spreading value.
Specifically, a first flame arrester 18 is fixedly arranged in the first conveying pipeline 9, a second flame arrester 20 is fixedly arranged in the return pipeline 6, and the second flame arrester 20 is positioned between the heat exchanger 4 and the chimney 7. The first flame arrester 18 is used for preventing external flame from entering the heat exchanger 4, so that organic waste gas in the heat exchanger 4 is combusted, and potential safety hazards are generated; the second flame arrester 20 is used for preventing the flame in the catalytic chamber 502 from channeling into the chimney 7 along with the backflow pipeline 6, and the organic waste gas discharged by the third pneumatic regulating valve 14 is ignited, so that the condition that the flame spreads in the waste gas discharge pipeline 1 is caused, the continuous and stable operation of the system can be ensured, and the safety performance of the equipment is improved.
Specifically, the heat exchanger 4 includes a housing 401, a concentration sensor 402, a push plate 403, a compression spring 404, a spiral tube 405, a control module 406, an air bag 407 and a first link 418, the housing 401 is provided with a heat exchange cavity 408 and an air storage cavity 409, the top of the air storage cavity 409 is provided with a chute 419, the heat exchange cavity 408 is communicated with the chute 419 through a first through hole 410, the top of the housing 401 is provided with an air outlet 415 communicated with the heat exchange cavity 408, one end of a second conveying pipeline 10 is communicated with the air outlet 415, the bottom of the housing 401 is provided with an air inlet 414 communicated with the heat exchange cavity 408, one end of the first conveying pipeline 9 is communicated with the air inlet 414, the spiral tube 405 is fixedly arranged in the heat exchange cavity 408, the concentration sensor 402 is fixedly arranged in the air outlet 415, the control cavity 416 is arranged between the heat exchange cavity 408 and the air storage cavity 409, the control module 406 is fixedly arranged in the control cavity 416, the heat exchange cavity 408 is communicated with the control cavity 416 through a second through hole 411, one end of the spiral pipe 405 is communicated with the second through hole 411, the other end of the spiral pipe 405 is communicated with the return pipe 6, the control cavity 416 is communicated with the side wall of the gas storage cavity 409 through a third through hole 412, an exhaust pipe 417 communicated with the control cavity 416 is further arranged on one side of the shell 401, the exhaust pipe 417 is communicated with the chimney 7 through the return pipe 6, the gas inlet hole 414 is communicated with the bottom of the gas storage cavity 409 through a fourth through hole 413, the gas bag 407 is fixedly arranged at the bottom of the gas storage cavity 409 and is communicated with the fourth through hole 413, the push plate 403 is slidably arranged in the chute 419, the push plate 403 is fixedly connected with the top of the gas bag 407 through a first connecting rod 418, the top of the push plate 403 is fixedly provided with a compression spring 404, and the push plate 403 is fixedly connected with the top wall of the chute 419 through the compression spring 404. In the embodiment, the model of the concentration sensor 402 is HS660-TVOC-10PD, the concentration sensor 402 can monitor the concentration of the exhaust gas in the heat exchange cavity 408 in real time, and the spiral pipe 405 can accelerate the heat exchange speed. In an initial state, the control module 406 is closed, at this time, the second through hole 411 is communicated with the exhaust pipe 417, when it is detected that the concentration of the exhaust gas in the heat exchange cavity 408 is high, the concentration sensor 402 starts the control module 406, the control module 406 closes the exhaust pipe 417 and communicates the second through hole 411 with the third through hole 412, at this time, the exhaust gas after combustion processing enters the gas storage cavity 409 through the third through hole 412, so that the air pressure in the gas storage cavity 409 is raised, and further the push plate 403 is pressed to enable the push plate 403 to move upwards along the sliding groove 419 against the elastic force of the compression spring 404, so as to communicate the sliding groove 419 with the first through hole 410, and further enable the exhaust gas to enter the heat exchange cavity 408 to dilute the dried exhaust gas, and simultaneously the push plate 403 moves upwards to pull the air bag 407 to expand, so that negative pressure is generated inside the air bag 407, and further the dried exhaust gas at the air inlet hole 414 is sucked into the air bag 407, so as to reduce the concentration of the exhaust gas in the heat exchange cavity 408, thereby avoiding the sudden rise, the waste gas in the catalytic chamber is decomposed too much, so that the temperature of the catalytic chamber is increased; when the concentration of the exhaust gas in the heat exchange cavity 408 is reduced, the concentration sensor 402 closes the control module 406 to conduct the second through hole 411 and the exhaust pipe 417, and at this time, the compression spring 404 pushes the push plate 403 to move down along the chute 419 to extrude the exhaust gas in the air bag 407 into the heat exchange cavity 408, thereby realizing the dynamic adjustment of the concentration of the exhaust gas. In addition, through the concentration that reduces the stoving waste gas in the heat transfer chamber 408, realize reducing the waste gas concentration in the catalytic chamber 502, can avoid catalytic combustion bed 17 not to come to decompose organic waste gas, make the condition of volatile organic compounds along with air current discharge chimney 7, and the not complete tail gas of decomposition can circulate catalytic decomposition in catalytic chamber 502 once more in the cycle process for exhaust-gas treatment's is cleaner, thorough. And because the air storage cavity 409 is in a negative pressure state in the compression process of the air bag 407, residual tail gas in the air storage cavity 409 cannot return to the control cavity 416, so that the situation that the residual tail gas is directly discharged from the exhaust pipeline 417 can be avoided.
Specifically, the control module 406 includes a driving motor 4061, a first rotating gear 4062, a sliding block 4063, a baffle 4064, a piston 4065, a rack 4066, a mounting rack 4067, and a water-absorbing sponge 4069, more than two baffles 4064 are fixed on the inner wall of the control cavity 416 at staggered intervals, a water collecting groove 4068 is opened at the bottom of the control cavity 416, the piston 4065 is slidably disposed in the exhaust pipe 417, and the piston 4065 is fixedly arranged at the bottom end of the rack 4066, the mounting rack 4067 is fixedly arranged on the side wall of the control cavity 416, the sliding block 4063 is slidably arranged on the mounting rack 4067, and the slider 4063 sets firmly in the rack 4066 top, and the bottom of the sponge 4069 that absorbs water sets firmly in the slider 4063 top, and the top of the sponge 4069 that absorbs water sets firmly on the mounting bracket 4067, and driving motor 4061 inlays in the control chamber 416 lateral wall, and first rotating gear 4062 sets firmly in driving motor 4061's power take off end, and the first rotating gear 4062 is engaged with the rack 4066, and the driving motor 4061 is electrically connected to the concentration sensor 402. When the control module 406 is in a closed state, the piston 4065 is located in the control cavity 416, the exhaust pipeline 417 is opened, the sliding block 4063 is located at the topmost part of the mounting frame 4067, the third through hole 412 is closed, the tail gas subjected to combustion processing enters the control cavity 416 through the second through hole 410, the transmission path of the tail gas is increased under the action of the baffle 4064, the water mist in the tail gas is condensed on the surface of the baffle 4064 and collected in the bottom water collecting groove 4068, and the tail gas from which the water mist is removed is discharged through the exhaust pipeline 417; when the control module 406 is opened, the driving motor 4061 drives the rack 4066 to move downwards through the first rotating gear 4062, the first rack 4066 moves downwards to drive the piston 4065 and the sliding block 4063 to move downwards, the exhaust pipeline 417 is closed, and the third through hole 412 is opened, so that the control cavity 406 is communicated with the gas storage cavity 409, meanwhile, the sliding block 4063 moves downwards to drive the water-absorbing sponge 4069 to expand and block at the inlet of the third through hole 412, so that the tail gas filters the water mist when entering the gas storage cavity 409, the water vapor is prevented from entering the heat exchange cavity 408, and the reaction efficiency of the catalytic combustion bed 17 is affected.
Specifically, the temperature monitoring module 19 includes a first temperature sensor 1901, a second temperature sensor 1902, a third temperature sensor 1903, and a fourth temperature sensor 1904, where the first temperature sensor 1901 is fixedly disposed in the first conveying pipe 9, the second temperature sensor 1902 is fixedly disposed in the return pipe 6, the third temperature sensor 1903 is fixedly disposed in the catalytic chamber 502, and the fourth temperature sensor 1904 is fixedly disposed in the heating chamber 501. The first temperature sensor 1901 is used for monitoring the initial temperature of the organic waste gas, and when the initial temperature of the organic waste gas is higher, the electric heater 16 can be controlled, adjusted and turned off through the PLC 8, so that the temperature of the organic waste gas can be prevented from being heated too high, the catalytic decomposition efficiency is prevented from being influenced, and energy can be saved; the second temperature sensor 1902 is used for monitoring the temperature of the tail gas after heat exchange, the third temperature sensor 1903 is used for monitoring the temperature in the catalytic chamber 502, the fourth temperature sensor 1904 is used for monitoring the temperature in the heating chamber 501, because in the catalytic decomposition process, the temperature in the catalytic chamber 502 can fluctuate along with the change of the concentration of the organic waste gas, when monitoring that the temperature in the heating chamber 501 or the catalytic chamber 502 fluctuates, the opening sizes of the fourth pneumatic regulating valve 15 and the second pneumatic regulating valve 13 can be adjusted through the PLC controller 8, and then the air inlet speed of the organic waste gas is adjusted, and further the gas concentration of the catalytic chamber 502 is kept stable.
Specifically, the electric heaters 16 are provided in two or more groups. The group number of the electric heaters 16 which are started is controlled by the PLC control cavity 8, and then the heating temperature in the heating chamber 501 is controlled, so that an operator can adjust the temperature gradient in the heating chamber as required.
The invention relates to a method for treating automobile body drying waste gas, which comprises the following steps:
s1, opening the first pneumatic valve 12 and the second pneumatic valve 13, and simultaneously closing the third pneumatic regulating valve 14 and the fourth pneumatic regulating valve 15;
s2, starting the system fan 3 and the electric heater 16, enabling outside air to enter the heating chamber 501 through the first pneumatic adjusting valve 12, the system fan 3, the second pneumatic valve 13 and the heat exchanger 4 in sequence, heating the air by the electric heater 16, folding the heated air back to the heat exchanger 4 through the catalytic chamber 502 and the return pipeline 6, and heating the inside of the heat exchanger 4 until the temperatures in the heat exchanger 4, the heating chamber 501 and the catalytic chamber 502 reach set values;
s3, opening the fourth pneumatic valve 15, closing the first pneumatic valve 12, enabling the organic waste gas to sequentially pass through the fourth pneumatic valve 15, the system fan 3 and the second pneumatic valve 13 to enter the heat exchanger 4, completing preheating in the heat exchanger 4, enabling the preheated organic waste gas to enter the heating chamber 501 to be heated continuously by the electric heater 16, enabling the high-temperature organic waste gas to enter the catalytic chamber 502 and be catalytically decomposed into CO2 and H2O by the catalytic combustion bed 17;
s4, high-temperature flue gas generated by catalytic decomposition is returned to the heat exchanger 4 through the return pipeline 6 to exchange heat with the organic waste gas, and is discharged from the chimney 7 after being cooled;
and S5, after all organic waste gas is treated, opening the first pneumatic valve 12 and the second pneumatic valve 13, closing the third pneumatic valve 14 and the fourth pneumatic valve 15, starting the system fan 3 and closing the electric heater 16, so that outside cold air enters the system, and the cooling process is realized.
The temperature change gradients in the heating chamber 501 and the catalytic chamber 502 are monitored in real time through the third temperature sensor 1903 and the fourth temperature sensor 1904, and the opening sizes of the first pneumatic valve 12, the second pneumatic valve 13, the third pneumatic valve 14 and the fourth pneumatic valve 15 and the number of the switch groups of the electric heater 16 are controlled and adjusted by the PLC 8, so that the dynamic temperature adjustment is realized.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (9)
1. The utility model provides a administer device for automobile body stoving waste gas which characterized in that: comprises a waste gas inlet pipeline (1), an air inlet pipeline (2), a system fan (3), a heat exchanger (4), a waste gas treatment box (5), a return pipeline (6), a chimney (7), a PLC (programmable logic controller) controller (8), a first conveying pipeline (9), a second conveying pipeline (10), a third conveying pipeline (11), a first pneumatic valve (12), a second pneumatic valve (13), a third pneumatic valve (14), a fourth pneumatic valve (15), an electric heater (16) and a catalytic combustion bed (17), wherein the waste gas inlet pipeline (1) and the air inlet pipeline (2) are connected in parallel to the input end of the system fan (3), the output end of the system fan (3) is communicated with the input end of the heat exchanger (4) through the first conveying pipeline (9), a heating chamber (501) and a catalytic chamber (502) are arranged in the waste gas treatment box (5), and the heating chamber (501) is communicated with the catalytic chamber (502), an electric heater (16) is fixedly arranged in a heating chamber (501), a catalytic combustion bed (17) is fixedly arranged in a catalytic chamber (502), the output end of a heat exchanger (4) is communicated with the heating chamber (501) through a second conveying pipeline (10), one end of a backflow pipeline (6) is communicated with the catalytic chamber (502), the other end of the backflow pipeline (6) penetrates through the heat exchanger (4) and is communicated with a chimney (7), a first conveying pipeline (9) is communicated with the backflow pipeline (6) through a third conveying pipeline (11), a first pneumatic valve (12) is fixedly arranged in an air inlet pipeline (2), a second pneumatic valve (13) is fixedly arranged in the first conveying pipeline (9), a third pneumatic valve (14) is fixedly arranged in the third conveying pipeline (11), a fourth pneumatic valve (15) is fixedly arranged in a waste gas inlet pipeline (1), a PLC (8) is fixedly arranged on one side of a waste gas treatment box (5), the automatic temperature control system comprises a first pneumatic valve (12), a second pneumatic valve (13), a third pneumatic valve (14), a fourth pneumatic valve (15) and an electric heater (16), and further comprises a temperature monitoring module (19), wherein the first pneumatic valve, the second pneumatic valve, the third pneumatic valve, the fourth pneumatic valve and the electric heater (16) are electrically connected with a PLC (programmable logic controller) (8), and the temperature monitoring module (19) is electrically connected with the PLC (8).
2. The treatment device for the drying exhaust gas of the automobile body according to claim 1, characterized in that: a first flame arrester (18) is fixedly arranged in the first conveying pipeline (9), a second flame arrester (20) is fixedly arranged in the backflow pipeline (6), and the second flame arrester (20) is located between the heat exchanger (4) and the chimney (7).
3. The treatment device for the drying exhaust gas of the automobile body according to claim 1, characterized in that: the heat exchanger (4) comprises a shell (401), a concentration sensor (402), a push plate (403), a compression spring (404), a spiral pipe (405), a control module (406), an air bag (407) and a first connecting rod (418), wherein a heat exchange cavity (408) and an air storage cavity (409) are formed in the shell (401), a chute (419) is formed in the top of the air storage cavity (409), the heat exchange cavity (408) is communicated with the chute (419) through a first through hole (410), an air outlet hole (415) communicated with the heat exchange cavity (408) is formed in the top of the shell (401), one end of the second conveying pipeline (10) is communicated with the air outlet hole (415), an air inlet hole (414) communicated with the heat exchange cavity (408) is formed in the bottom of the shell (401), one end of the first conveying pipeline (9) is communicated with the air inlet hole (414), the spiral pipe (405) is fixedly arranged in the heat exchange cavity (408), the concentration sensor (402) is fixedly arranged in the air outlet hole (415), a control cavity (416) is arranged between the heat exchange cavity (408) and the gas storage cavity (409), a control module (406) is fixedly arranged in the control cavity (416), the heat exchange cavity (408) is communicated with the control cavity (416) through a second through hole (411), one end of a spiral pipe (405) is communicated with the second through hole (411), the other end of the spiral pipe (405) is communicated with the backflow pipeline (6), the control cavity (416) is communicated with the side wall of the gas storage cavity (409) through a third through hole (412), one side of the shell (401) is also provided with an exhaust pipeline (417) communicated with the control cavity (416), the exhaust pipeline (417) is communicated with the chimney (7) through the backflow pipeline (6), the air storage cavity (414) is communicated with the bottom of the gas storage cavity (409) through a fourth through hole (413), the air bag (407) is fixedly arranged at the bottom of the gas storage cavity (409) and is communicated with the fourth through hole (413), and the air bag (407) is slidably arranged in a push plate (419), and the push plate (403) is fixedly connected with the top of the air bag (407) through a first connecting rod (418), a compression spring (404) is fixedly arranged at the top of the push plate (403), and the push plate (403) is fixedly connected with the top wall of the chute (419) through the compression spring (404).
4. The treatment device for the drying exhaust gas of the automobile body according to claim 3, characterized in that: control module (406) includes driving motor (4061), first rotation gear (4062), slider (4063), baffle (4064), piston (4065), rack (4066), mounting bracket (4067) and water-absorbing sponge (4069), baffle (4064) more than two crisscross intervals set firmly in the inner wall of control chamber (416), water catch bowl (4068) have been seted up to control chamber (416) bottom, piston (4065) slide set up in exhaust duct (417), and rack (4066) bottom that piston (4065) set firmly in, mounting bracket (4067) set firmly in control chamber (416) lateral wall, slider (4063) slide set up on mounting bracket (4067), and slider (4063) set firmly in rack (4066) top, the bottom of water-absorbing sponge (4069) sets firmly in slider (4063) top, the top of water-absorbing sponge (4069) sets firmly on mounting bracket (4067), driving motor (4061) inlays in control chamber (416) lateral wall, first rotating gear (4062) set firmly in driving motor's (4061) power take off end, and first rotating gear (4062) and rack (4066) meshing, driving motor (4061) with concentration sensor (402) electric connection.
5. The treatment device for the drying exhaust gas of the automobile body according to claim 1, characterized in that: the temperature monitoring module (19) comprises a first temperature sensor (1901), a second temperature sensor (1902), a third temperature sensor (1903) and a fourth temperature sensor (1904), wherein the first temperature sensor (1901) is fixedly arranged in the first conveying pipeline (9), the second temperature sensor (1902) is fixedly arranged in the backflow pipeline (6), the third temperature sensor (1903) is fixedly arranged in the catalytic chamber (502), and the fourth temperature sensor (1904) is fixedly arranged in the heating chamber (501).
6. The treatment device for the drying exhaust gas of the automobile body according to claim 1, characterized in that: the electric heaters (16) are provided with two or more groups.
7. A treating method for the treating device for the drying exhaust gas of the vehicle body according to any one of claims 1 to 6, characterized by comprising the steps of:
s1, opening the first pneumatic valve (12) and the second pneumatic valve (13), and closing the third pneumatic regulating valve (14) and the fourth pneumatic regulating valve (15);
s2, starting a system fan (3) and an electric heater (16), allowing outside air to enter a heating chamber (501) through a first pneumatic adjusting valve (12), the system fan (3), a second pneumatic valve (13) and a heat exchanger (4) in sequence, heating the air by the electric heater (16), folding heated air obtained by heating back to the heat exchanger (4) through a catalytic chamber (502) and a backflow pipeline (6), and heating the inside of the heat exchanger (4) until the temperatures in the heat exchanger (4), the heating chamber (501) and the catalytic chamber (502) reach set values;
s3, opening the fourth pneumatic valve (15), closing the first pneumatic valve (12), enabling the organic waste gas to sequentially pass through the fourth pneumatic valve (15), the system fan (3) and the second pneumatic valve (13) to enter the heat exchanger (4), preheating in the heat exchanger (4) is completed, the preheated organic waste gas enters the heating chamber (501) to be continuously heated by the electric heater (16), and the high-temperature organic waste gas enters the catalytic chamber (502) and is catalytically decomposed into CO by the catalytic combustion bed (17)2And H2O；
S4, high-temperature flue gas generated by catalytic decomposition is returned to the heat exchanger (4) through the return pipeline (6) to exchange heat with the organic waste gas, and is discharged from the chimney (7) after being cooled;
s5, after all organic waste gas is treated, opening the first pneumatic valve (12) and the second pneumatic valve (13), closing the third pneumatic valve (14) and the fourth pneumatic valve (15), starting the system fan (3) and closing the electric heater (16), so that outside cold air enters the system, and the cooling process is realized.
8. The treatment device for the drying exhaust gas of the automobile body according to claim 7, characterized in that: the temperature change gradients in the heating chamber (501) and the catalytic chamber (502) are monitored in real time through the third temperature sensor (1903) and the fourth temperature sensor (1904), and the opening sizes of the first pneumatic valve (12), the second pneumatic valve (13), the third pneumatic valve (14) and the fourth pneumatic valve (15) and the number of switch groups of the electric heater (16) are controlled and adjusted by the PLC (8), so that the dynamic temperature adjustment is realized.
9. The treatment device for the drying exhaust gas of the automobile body according to claim 7, characterized in that: when the temperature exceeds a certain temperature gradient, the PLC (8) controls the third pneumatic valve (14) to be opened, and simultaneously the opening size of the second pneumatic valve (13) is reduced, so that most of organic waste gas is directly discharged from the chimney (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110775619.XA CN113357655A (en) | 2021-07-08 | 2021-07-08 | Treatment device and treatment method for automobile body drying waste gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110775619.XA CN113357655A (en) | 2021-07-08 | 2021-07-08 | Treatment device and treatment method for automobile body drying waste gas |
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| CN113357655A true CN113357655A (en) | 2021-09-07 |
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| CN202110775619.XA Withdrawn CN113357655A (en) | 2021-07-08 | 2021-07-08 | Treatment device and treatment method for automobile body drying waste gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114699911A (en) * | 2022-04-11 | 2022-07-05 | 苏州晶拓半导体科技有限公司 | Ozone destruction device based on heat recovery and ozone destruction method thereof |
| CN115040969A (en) * | 2022-06-07 | 2022-09-13 | 安徽紫科环保科技有限公司 | Automobile drying waste gas treatment device |
-
2021
- 2021-07-08 CN CN202110775619.XA patent/CN113357655A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114699911A (en) * | 2022-04-11 | 2022-07-05 | 苏州晶拓半导体科技有限公司 | Ozone destruction device based on heat recovery and ozone destruction method thereof |
| CN115040969A (en) * | 2022-06-07 | 2022-09-13 | 安徽紫科环保科技有限公司 | Automobile drying waste gas treatment device |
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