CN112316666A - Waste gas treatment system with pretreatment, zeolite rotation and CO and waste gas treatment method thereof - Google Patents

Abstract

The invention relates to a waste gas treatment system with pretreatment, zeolite rotation and CO, which comprises a pretreatment device, a zeolite rotation device, a CO device and a smoke exhaust pipe, wherein the pretreatment device is provided with an air inlet pipe for waste gas to enter and an air outlet pipe fixedly connected with the zeolite rotation device; a plurality of zeolite modules clamped between the first mounting groove and the second mounting groove are arranged between the two brackets; the smoke exhaust pipe is provided with a third air inlet; a heat exchanger is arranged in the CO device, a heat exchange cavity is arranged in the heat exchanger, a second partition plate is arranged in the heat exchange cavity, and the second partition plate divides the heat exchange cavity into a first heat exchange cavity and a second heat exchange cavity; simple structure, the dismouting, adjust convenient, improved work efficiency, it is wide to be suitable for operational environment.

Description

Waste gas treatment system with pretreatment, zeolite rotation and CO and waste gas treatment method thereof

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of waste gas treatment, in particular to a waste gas treatment system with pretreatment, zeolite rotation and CO and a waste gas treatment method thereof.

[ background of the invention ]

In the prior art, zeolite rotation usually adopts the superposition of one or more zeolites, so as to carry out the work of adsorption, desorption and the like, the zeolite rotation has large volume, hoisting equipment is required to be used for dismounting, the replacement is inconvenient when a fault occurs, and the problems of poor adsorption and desorption effects, short service life and the like of the zeolite rotation can also be caused by the simple superposition of several zeolites; for a CO device, the heat exchanger in the prior art often causes the mixing of clean air generated after desorption and hot air generated after combustion, so that not only is a loop disordered and the gas cannot well enter a preset pipeline, but the mixing of the two gases causes the temperature to be reduced, thereby causing a series of chain conditions such as insufficient zeolite desorption and poor adsorption effect in the subsequent circulation process; thus, the prior art does not satisfy our needs.

[ summary of the invention ]

In order to solve the problems, the invention provides an exhaust gas treatment system with pretreatment, zeolite circulation and CO, which is convenient to install and has high efficiency, and an exhaust gas treatment method thereof.

In order to achieve the purpose, the invention provides the following technical scheme:

a waste gas treatment system with pretreatment, zeolite rotation and CO comprises a pretreatment device, a zeolite rotation device, a CO device and a smoke exhaust pipe, wherein the pretreatment device is provided with an air inlet pipe for waste gas to enter and an air outlet pipe fixedly connected with the zeolite rotation device; the support mainly comprises a first fixing plate, a second fixing plate and a connecting plate for connecting the first fixing plate and the second fixing plate, wherein a first mounting groove and a second mounting groove are formed among the first fixing plate, the second fixing plate and the connecting plate, and a plurality of zeolite modules which are clamped between the first mounting groove and the second mounting groove and are stacked together are arranged between the two supports; the first shell is also provided with a cover plate, the lower end of the cover plate extends downwards to form a first partition plate, and a first accommodating cavity and a second accommodating cavity are formed among the lower bottom plate, the bracket, the zeolite module and the first partition plate; the upper end of the cover plate is provided with a first air outlet communicated with the first accommodating cavity and a first air inlet communicated with the second accommodating cavity; a second air inlet connected with the air outlet pipe is formed in one side, located at the first air outlet, of the first shell, and a second air outlet is formed in the other side of the first shell; the smoke exhaust pipe is provided with a third air inlet; a heat exchanger is arranged in the CO device, a heat exchange cavity is arranged in the heat exchanger, a second partition plate is arranged in the heat exchange cavity, and the second partition plate divides the heat exchange cavity into a first heat exchange cavity and a second heat exchange cavity; the CO device is provided with a first air pipe and a second air pipe, the tail ends of the first air pipe and the second air pipe are respectively provided with a first three-way valve and a second three-way valve, the first heat exchange cavity is respectively provided with a first air outlet pipe and a second air outlet pipe which are communicated with the first three-way valve and the second three-way valve, and the first heat exchange cavity is also communicated with the third air inlet through a third air pipe; the second heat exchange cavity is communicated with the first air outlet and the first air inlet through a fourth air pipe and a fifth air pipe respectively; the second gas outlet is connected with a third gas outlet pipe, the tail end of the third gas outlet pipe is provided with a third three-way valve, and the third three-way valve is connected with the first three-way valve and the second three-way valve through a sixth gas pipe and a seventh gas pipe respectively.

As a preferred embodiment, further defined is: and a plurality of heat exchange tubes inserted on the second partition plate are arranged in the heat exchanger, and the heat exchange tubes are distributed in a spiral shape.

As a preferred embodiment, further defined is: the lateral wall of first fixed plate and second fixed plate is circular-arcly, supply when being provided with the assembly on the lower plate first fixed plate and second fixed plate male first draw-in groove and second draw-in groove, still be provided with on the lower plate and be located fixed logical groove between first draw-in groove and the second draw-in groove, the connecting plate lower extreme be provided with fixed lead to the screw hole that the groove was aimed mutually, the support passes through bolt fixed connection and is in on the lower plate.

As a preferred embodiment, further defined is: the first clamping groove, the second clamping groove and the fixed through groove are all coaxially arranged.

As a preferred embodiment, further defined is: the zeolite wheel rotating device further comprises a rotary table and a first motor, the lower bottom plate is fixedly connected to the rotary table, and the first motor is connected with the rotary table through an output shaft in a gear mode.

As a preferred embodiment, further defined is: the zeolite wheel turning device further comprises first separation curtains arranged on the inner walls of the front end and the rear end of the first shell, the first separation curtains separate the installation cavity into a first installation cavity and a second installation cavity, and the first separation curtains are tightly attached to the outer peripheral surface of the support or the zeolite module during operation.

As a preferred embodiment, further defined is: the zeolite module is fan-shaped, and the support and the zeolite module are cylindrical after being assembled.

As a preferred embodiment, further defined is: the CO device comprises a second shell, a third installation cavity is formed in the second shell, a combustion chamber, a catalysis chamber and an installation are sequentially arranged in the third installation cavity from top to bottom, a third partition plate is arranged in the catalysis chamber, the third partition plate enables the catalysis chamber and the partition plate to form a first catalysis chamber and a second catalysis chamber, and a first air pipe and a second air pipe are respectively communicated with the first catalysis chamber and the second catalysis chamber.

As a preferred embodiment, further defined is: still be provided with flame projecting device and gas vent in the combustion chamber, the gas vent through eighth pipeline with the third air inlet is connected.

A method of treating exhaust gas comprising the exhaust gas treatment system of any of claims 1-9 having pretreatment, zeolite circulation, and CO, comprising the steps of:

step S1, the waste gas enters the pretreatment device from the gas inlet pipe, is pretreated and then is discharged through the gas outlet pipe;

step S2, enabling the waste gas discharged by the gas outlet pipe and processed to enter the first installation cavity from a second gas inlet, adsorbing the waste gas by a zeolite module which rotates into the first installation cavity after desorption, enabling the adsorbed clean gas to enter the first accommodating cavity and enter the second heat exchange cavity through the first gas outlet and the fourth gas pipe in sequence, heating the clean gas by the heat exchange pipe and then entering the second installation cavity through the fifth gas pipe and the first gas inlet in sequence to desorb the zeolite module which rotates into the second installation cavity after desorption;

step S3, controlling the first three-way valve, the second three-way valve and the third three-way valve respectively to make the sixth gas pipe communicated with the third gas outlet pipe and the first gas pipe, the second air pipe is communicated with the second air outlet pipe, high-concentration waste gas generated after desorption sequentially passes through the second air outlet, the third air outlet pipe, the sixth air pipe, the first air pipe and the first catalytic chamber and then enters the combustion chamber for combustion treatment, and carbon dioxide after combustion enters the smoke exhaust pipe after passing through the exhaust port, the eighth pipeline and the third air inlet and then is discharged to the outside through the smoke exhaust pipe, hot gas generated by combustion sequentially passes through the second catalytic chamber, the second gas pipe and the second gas outlet pipe and then enters the first heat exchange cavity to heat the heat exchange pipe, and the hot gas after heat exchange enters the smoke exhaust pipe through the third gas pipe and the third gas inlet and is exhausted to the outside through the third gas pipe and the third gas inlet;

step S4, controlling the first three-way valve, the second three-way valve and the third three-way valve respectively to make the seventh air pipe communicate with the third air outlet pipe and the second air pipe, the first air pipe is communicated with the first air outlet pipe, high-concentration waste gas generated after desorption sequentially passes through the second air outlet, the third air outlet pipe, the seventh air pipe, the second air pipe and the second catalytic chamber and then enters the combustion chamber for combustion treatment, and carbon dioxide after combustion enters the smoke exhaust pipe after passing through the exhaust port, the eighth pipeline and the third air inlet and then is discharged to the outside through the smoke exhaust pipe, hot gas generated by combustion sequentially passes through the first catalytic chamber, the first gas pipe and the first gas outlet pipe and then enters the first heat exchange cavity to heat the heat exchange pipe, and the hot gas after heat exchange enters the smoke exhaust pipe through the third gas pipe and the third gas inlet and is exhausted to the outside through the third gas pipe and the third gas inlet;

step S5, step S1 and step S2 continue, and the next loop process is performed again from step S3.

The beneficial effects of the invention are as follows:

1. the invention is provided with the support, the lower bottom plate is provided with the first clamping groove, the second clamping groove and the fixing through groove for fixing, and a user can freely increase and decrease the number of the supports and adjust the space between the supports according to the waste gas concentration and the zeolite adsorption effect, so that the invention is suitable for the zeolites with different sizes and numbers, has simple structure, convenient assembly, disassembly and adjustment, improves the working efficiency and is suitable for wide working environment;

2. the invention is provided with the first curtain and separates the installation cavity into the first installation cavity and the second installation cavity, so that the adsorption and desorption processes of zeolite are separated, the situation that untreated high-air-volume and low-concentration waste gas enters the second installation cavity from the first installation cavity and is mixed with low-air-volume and high-concentration waste gas generated after desorption is effectively reduced, the waste gas treated by a CO device is always in high concentration, the energy consumption is reduced, and the working efficiency is improved;

3. the first separating plate is arranged, clean gas generated by adsorption enters the first accommodating cavity, hot gas for desorption is located in the second accommodating cavity, the two gases are not interfered with each other, the temperature drop caused by contact of the hot gas for desorption and the clean gas is avoided, so that the desorption of the zeolite module is insufficient, a series of linkage conditions such as poor adsorption effect and the like of the zeolite module are caused in the subsequent circulating process, the energy consumption is reduced, and the working efficiency is improved;

4. the second partition plate is arranged in the heat exchanger and divides the heat exchange cavity into the first heat exchange cavity and the second heat exchange cavity, so that clean air generated after desorption is located in the second heat exchange cavity, hot air generated after combustion is located in the first heat exchange cavity, a loop is disordered, gas can well enter a preset pipeline, a series of chain conditions that the desorption of the zeolite module is insufficient, the adsorption effect of the zeolite module is poor in a subsequent circulation process are avoided, energy consumption is reduced, and working efficiency is improved.

[ description of the drawings ]

FIG. 1 is a schematic structural diagram of the invention;

FIG. 2 is a schematic structural view of a zeolite wheel;

FIG. 3 is an exploded schematic view of a zeolite wheel cycle;

FIG. 4 is a transverse cross-sectional view of the zeolite wheel;

FIG. 5 is a schematic structural view of a stent;

FIG. 6 is a schematic view of the heat exchanger;

fig. 7 is a transverse cross-sectional view of the heat exchanger.

[ detailed description ] embodiments

The invention is described in further detail below with reference to the following figures and detailed description:

as shown in fig. 1 to 7, an exhaust gas treatment system with pretreatment, zeolite rotation and CO comprises a pretreatment device 1, a zeolite rotation device 2, a CO device 3 and a smoke exhaust pipe 4, wherein the pretreatment device 1 is provided with an air inlet pipe 11 for allowing exhaust gas to enter and an air outlet pipe 12 fixedly connected with the zeolite rotation device 2, the zeolite rotation device 2 comprises a first shell 21, an installation cavity is arranged in the first shell 21, and a lower bottom plate 22 and a plurality of brackets 23 fixedly connected to the lower bottom plate 22 are arranged in the installation cavity; the support 23 mainly comprises a first fixing plate 231, a second fixing plate 232 and a connecting plate 233 connecting the first fixing plate 231 and the second fixing plate 232, wherein a first mounting groove 234 and a second mounting groove 235 are formed between the first fixing plate 231, the second fixing plate 232 and the connecting plate 233, and a plurality of zeolite modules 24 clamped between the first mounting groove 234 and the second mounting groove 235 and stacked together are arranged between the two supports 23; the first shell 21 is further provided with a cover plate 211, the lower end of the cover plate 211 extends downwards to form a first partition plate 212, and a first accommodating cavity 221 and a second accommodating cavity 222 are formed among the lower bottom plate 22, the bracket 23, the zeolite module 24 and the first partition plate 212; the upper end of the cover plate 211 is provided with a first air outlet 213 communicated with the first accommodating cavity 221 and a first air inlet 214 communicated with the second accommodating cavity 222; a second air inlet 215 connected with the air outlet pipe 12 is arranged on one side of the first outer shell 21 positioned at the first air outlet 213, and a second air outlet 216 is arranged on the other side of the first outer shell 21; the smoke exhaust pipe 4 is provided with a third air inlet 41; a heat exchanger 5 is arranged in the CO device 3, a heat exchange cavity is arranged in the heat exchanger 5, a second partition plate 51 is arranged in the heat exchange cavity, and the second partition plate 51 divides the heat exchange cavity into a first heat exchange cavity 52 and a second heat exchange cavity 53; the CO device 3 is provided with a first air pipe 31 and a second air pipe 32, the tail ends of the first air pipe 31 and the second air pipe 32 are respectively provided with a first three-way valve 61 and a second three-way valve 62, the first heat exchange cavity 52 is respectively provided with a first air outlet pipe 521 and a second air outlet pipe 522 which are communicated with the first three-way valve 61 and the second three-way valve 62, and the first heat exchange cavity 52 is also communicated with the third air inlet 41 through a third air pipe 33; the second heat exchange cavity 53 is communicated with the first air outlet 213 and the first air inlet 214 through a fourth air pipe 34 and a fifth air pipe 35 respectively; the second air outlet 216 is connected with a third air outlet pipe 219, the end of the third air outlet pipe 219 is provided with a third three-way valve 63, and the third three-way valve 63 is respectively connected with the first three-way valve 61 and the second three-way valve 62 through a sixth air pipe 36 and a seventh air pipe 37; the first partition plate 212 is arranged, clean gas generated by adsorption enters the first accommodating cavity 221, hot gas for desorption is located in the second accommodating cavity 222, the two gases are not interfered with each other, and the problem that the temperature is reduced due to contact between the hot gas for desorption and the clean gas, so that the zeolite module 24 is insufficiently desorbed, a series of linkage conditions such as poor adsorption effect and the like of the zeolite module 24 occur in the subsequent circulation process is avoided, the energy consumption is reduced, and the working efficiency is improved; the structure is simple, the disassembly, the assembly and the adjustment are convenient, the working efficiency is improved, and the application range is wide; the eighth pipeline 8, the third air pipe 33, the fourth air pipe 34, the fifth air pipe 35 and the third air outlet pipe 219 are all provided with a fan 10; furthermore, in the present embodiment, the first partition plate 212 is disposed in a plane, and the user may set the first partition plate 212 to be semicircular according to the exhaust gas concentration and the zeolite adsorption effect, so that the ratio of the volume of the first accommodating chamber 221 to the volume of the second accommodating chamber 222 is 2: 1. 3: 1 or 4: 1, free set, so that the zeolite module 24 cools as quickly as possible and the desorption and adsorption process is more continuous.

As shown in fig. 1, fig. 6 and fig. 7, in this embodiment, a plurality of heat exchange tubes 54 inserted into the second partition plate 51 are disposed in the heat exchanger 5, and the heat exchange tubes 54 are distributed in a spiral shape; the second partition plate is arranged and divides the heat exchange cavity into a first heat exchange cavity 52 and a second heat exchange cavity 53, so that clean air generated after desorption is positioned in the second heat exchange cavity 53, hot air generated after combustion is positioned in the first heat exchange cavity 52, a loop is disordered, gas can well enter a preset pipeline, and a series of chain conditions that the desorption of the zeolite module 24 is insufficient, the adsorption effect of the zeolite module 24 is poor and the like in a subsequent circulation process are avoided; the heat exchange tubes 54 are distributed in a spiral shape, so that the heat exchange tubes 54 increase the heat absorption area and the heat absorption efficiency, the heat absorbed by the first heat exchange cavity 52 is transferred into the second heat exchange cavity 53 to heat the clean gas, the clean gas is better desorbed from the zeolite module 24, the energy consumption is reduced, and the working efficiency is improved.

As shown in fig. 3 to 5, in this embodiment, the side walls of the first fixing plate 231 and the second fixing plate 232 are arc-shaped, the lower plate 22 is provided with a first clamping groove 223 and a second clamping groove 224 into which the first fixing plate 231 and the second fixing plate 232 are inserted during assembly, the lower plate 22 is further provided with a fixing through groove 225 located between the first clamping groove 223 and the second clamping groove 224, the lower end of the connecting plate 233 is provided with a screw hole 236 aligned with the fixing through groove 225, and the bracket 23 is fixedly connected to the lower plate 22 through a bolt; the first clamping groove 223, the second clamping groove 224 and the fixed through groove 225 are all coaxially arranged; the zeolite rotating device 2 further comprises a rotating disc 25 and a first motor 26, the lower base plate 22 is fixedly connected to the rotating disc 25, and the first motor 26 is in gear connection with the rotating disc 25 through an output shaft; the zeolite module 24 is fan-shaped, and the bracket 23 and the zeolite module 24 are cylindrical after being assembled; a bracket 23 is arranged, and the lower bottom plate 22 is provided with a first clamping groove 223, a second clamping groove 224 and a fixing through groove 225 for fixing; furthermore, in this embodiment, the number of the supports 23 and the number of the zeolite modules 24 are 6, so that a user can freely increase or decrease the number of the supports and adjust the spacing between the supports according to the exhaust gas concentration and the zeolite adsorption effect, thereby being suitable for zeolites with different sizes and numbers, and the supports 23 and the zeolite modules 24 can be set to be 8, 9, 10 or 12, so that the structure is simple, the assembly, disassembly and adjustment are convenient, the working efficiency is improved, and the applicable working environment is wide.

As shown in fig. 3, in this embodiment, the zeolite wheel turning device 2 further includes first curtains 27 disposed on inner walls of front and rear ends of the first housing 21, the first curtains 27 partition the installation cavity into a first installation cavity 217 and a second installation cavity 218, and the first curtains 27 are closely attached to an outer circumferential surface of the bracket 23 or the zeolite module 24 during operation; the first curtain 27 separates the installation cavity into a first installation cavity 217 and a second installation cavity 218, so that the adsorption and desorption processes of zeolite are separated, the situation that untreated high-air-volume and low-concentration waste gas enters the second installation cavity from the first installation cavity and is mixed with low-air-volume and high-concentration waste gas generated after desorption is effectively reduced, the waste gas treated by the CO device 3 is always in high concentration, the energy consumption is reduced, and the working efficiency is improved.

As shown in fig. 1, in the present embodiment, the CO plant 3 includes a second housing 38, a third installation cavity is disposed in the second housing 38, a combustion chamber 381, a catalyst chamber and an installation are sequentially disposed in the third installation cavity from top to bottom, a third partition plate 39 is disposed in the catalyst chamber, the third partition plate 39 partitions the catalyst chamber into a first catalyst chamber 382 and a second catalyst chamber 383, and the first air pipe 31 and the second air pipe 32 are respectively communicated with the first catalyst chamber 382 and the second catalyst chamber 383; a flame projecting device 384 and an exhaust port 385 are arranged in the combustion chamber 381, and the exhaust port 385 is connected with the third air inlet 41 through an eighth pipeline 8; simple structure, easy dismounting, the treatment effect is good, has improved work efficiency, and applicable operational environment is wide.

Furthermore, all be provided with waste gas concentration sensor in outlet duct 12 and the third outlet duct 219, waste gas concentration sensor's signal output part links to each other with PLC's input, and PLC knows waste gas concentration's size in time according to the signal received to control the rotational speed of first motor 26, improve zeolite wheel device 2's adsorption effect and the holistic work efficiency of system.

A method of treating exhaust gas comprising the exhaust gas treatment system of any of claims 1 to 9 with pretreatment, zeolite circulation and CO as shown in figure 1, comprising the steps of:

step S1, the waste gas enters the pretreatment device 1 from the gas inlet pipe 11, is pretreated and then is discharged through the gas outlet pipe 12;

step S2, the exhaust gas discharged from the outlet pipe 12 and processed enters the first installation cavity 217 from the second gas inlet 215, the desorbed exhaust gas is adsorbed by the zeolite module 24 rotating into the first installation cavity 217, the adsorbed clean gas enters the first accommodation cavity 221 and sequentially enters the second heat exchange cavity 53 through the first gas outlet 213 and the fourth gas pipe 34, the heat exchange pipe 54 heats the clean gas and sequentially enters the second installation cavity 218 through the fifth gas pipe 35 and the first gas inlet 214, and the desorbed zeolite module 24 rotating into the second installation cavity 218 is desorbed;

step S3, controlling the first three-way valve 61, the second three-way valve 62 and the third three-way valve 63 respectively to make the sixth air pipe 36 communicate with the third air outlet pipe 219 and the first air pipe 31, the second gas pipe 32 is communicated with the second gas outlet pipe 522, the high-concentration waste gas generated after desorption sequentially passes through the second gas outlet 216, the third gas outlet pipe 219, the sixth gas pipe 36, the first gas pipe 31 and the first catalytic chamber 382 and then enters the combustion chamber 381 for combustion treatment, the combusted carbon dioxide passes through the exhaust port 385, the eighth pipeline 8 and the third gas inlet 41 and then enters the smoke exhaust pipe 4 and is discharged to the outside through the smoke exhaust pipe 4, hot gas generated by combustion sequentially passes through the second catalytic chamber 383, the second gas pipe 32 and the second gas outlet pipe 522 and then enters the first heat exchange cavity 52 to heat the heat exchange pipe 54, and the hot gas after heat exchange enters the smoke exhaust pipe 4 through the third gas pipe 33 and the third gas inlet 41 and is exhausted to the outside through the smoke exhaust pipe;

step S4, controlling the first three-way valve 61, the second three-way valve 62 and the third three-way valve 63 respectively to make the seventh air pipe 37 communicate with the third air pipe 219 and the second air pipe 32, the first air pipe 31 is communicated with the first air outlet pipe 521, high-concentration waste gas generated after desorption sequentially passes through the second air outlet 216, the third air outlet pipe 219, the seventh air pipe 37, the second air pipe 32 and the second catalytic chamber 383 and then enters the combustion chamber 381 for combustion treatment, and carbon dioxide after combustion enters the smoke exhaust pipe 4 through the exhaust port 385, the eighth pipeline 8 and the third air inlet 41 and is discharged to the outside through the smoke exhaust pipe 4, hot gas generated by combustion sequentially passes through the first catalytic chamber 382, the first air pipe 31 and the first air outlet pipe 521 and then enters the first heat exchange cavity 52 to heat the heat exchange pipe 54, and the hot gas after heat exchange enters the smoke exhaust pipe 4 through the third air pipe 33 and the third air inlet 41 and is exhausted to the outside through the smoke exhaust pipe;

step S5, step S1 and step S2 continue, and the next loop process is performed again from step S3.

The whole waste gas treatment process is continuous, desorption and adsorption continuously work, for CO device 3 continuously provides high-concentration waste gas, and heat exchanger 5 heat exchange efficiency is high, can continuously provide the high-temperature gas that is used for the desorption for zeolite wheel rotating device 2, and each three-way valve switches freely, and the clean gas that produces after the absorption does not mutually interfere with the high-concentration waste gas that produces after the desorption, has reduced the energy consumption, has improved work efficiency, has fine economic benefits and the value of environmental protection.

Claims (10)

1. An exhaust treatment system having pretreatment, zeolite circulation, and CO, characterized by: the device comprises a pretreatment device (1), a zeolite rotary device (2), a CO device (3) and a smoke exhaust pipe (4), wherein the pretreatment device (1) is provided with an air inlet pipe (11) for waste gas to enter and an air outlet pipe (12) fixedly connected with the zeolite rotary device (2), the zeolite rotary device (2) comprises a first shell (21), an installation cavity is arranged in the first shell (21), and a lower bottom plate (22) and a plurality of supports (23) fixedly connected to the lower bottom plate (22) are arranged in the installation cavity; the support (23) mainly comprises a first fixing plate (231), a second fixing plate (232) and a connecting plate (233) for connecting the first fixing plate (231) and the second fixing plate (232), wherein a first mounting groove (234) and a second mounting groove (235) are formed between the first fixing plate (231), the second fixing plate (232) and the connecting plate (233), and a plurality of zeolite modules (24) which are clamped between the first mounting groove (234) and the second mounting groove (235) and stacked together are arranged between the two supports (23); the first shell (21) is further provided with a cover plate (211), the lower end of the cover plate (211) extends downwards to form a first partition plate (212), and a first accommodating cavity (221) and a second accommodating cavity (222) are formed among the lower bottom plate (22), the bracket (23), the zeolite module (24) and the first partition plate (212); the upper end of the cover plate (211) is provided with a first air outlet (213) communicated with the first accommodating cavity (221) and a first air inlet (214) communicated with the second accommodating cavity (222); a second air inlet (215) connected with the air outlet pipe (12) is formed in one side, located at the first air outlet (213), of the first shell (21), and a second air outlet (216) is formed in the other side of the first shell (21); the smoke exhaust pipe (4) is provided with a third air inlet (41); a heat exchanger (5) is arranged in the CO device (3), a heat exchange cavity is arranged in the heat exchanger (5), a second partition plate (51) is arranged in the heat exchange cavity, and the heat exchange cavity is divided into a first heat exchange cavity (52) and a second heat exchange cavity (53) by the second partition plate (51); the CO device (3) is provided with a first air pipe (31) and a second air pipe (32), the tail ends of the first air pipe (31) and the second air pipe (32) are respectively provided with a first three-way valve (61) and a second three-way valve (62), the first heat exchange cavity (52) is respectively provided with a first air outlet pipe (521) and a second air outlet pipe (522) communicated with the first three-way valve (61) and the second three-way valve (62), and the first heat exchange cavity (52) is also communicated with the third air inlet (41) through a third air pipe (33); the second heat exchange cavity (53) is communicated with the first air outlet (213) and the first air inlet (214) through a fourth air pipe (34) and a fifth air pipe (35) respectively; the second air outlet (216) is connected with a third air outlet pipe (219), a third three-way valve (63) is arranged at the tail end of the third air outlet pipe (219), and the third three-way valve (63) is connected with the first three-way valve (61) and the second three-way valve (62) through a sixth air pipe (36) and a seventh air pipe (37) respectively.

2. The exhaust gas treatment system with pretreatment, zeolite circulation, and CO of claim 1, wherein: a plurality of heat exchange tubes (54) inserted on the second partition plate (51) are arranged in the heat exchanger (5), and the heat exchange tubes (54) are distributed in a spiral shape.

3. The exhaust gas treatment system with pretreatment, zeolite circulation, and CO of claim 1, wherein: the lateral wall of first fixed plate (231) and second fixed plate (232) is circular-arcly, supply when being provided with the assembly on lower plate (22) first fixed plate (231) and second fixed plate (232) male first draw-in groove (223) and second draw-in groove (224), still be provided with on lower plate (22) and be located fixed logical groove (225) between first draw-in groove (223) and second draw-in groove (224), connecting plate (233) lower extreme be provided with fixed lead to screw hole (236) that groove (225) were aligned mutually, support (23) pass through bolt fixed connection in on lower plate (22).

4. The exhaust gas treatment system with pretreatment, zeolite circulation, and CO of claim 3, wherein: the first clamping groove (223), the second clamping groove (224) and the fixed through groove (225) are all coaxially arranged.

5. The exhaust gas treatment system with pretreatment, zeolite circulation, and CO of claim 4, wherein: the zeolite rotating device (2) further comprises a rotating disc (25) and a first motor (26), the lower base plate (22) is fixedly connected to the rotating disc (25), and the first motor (26) is in gear connection with the rotating disc (25) through an output shaft.

6. The exhaust gas treatment system with pretreatment, zeolite circulation, and CO of claim 5, wherein: the zeolite wheel turning device (2) further comprises first curtains (27) arranged on the inner walls of the front end and the rear end of the first shell (21), the first curtains (27) divide the installation cavity into a first installation cavity (217) and a second installation cavity (218), and the first curtains (27) are tightly attached to the outer peripheral surface of the support (23) or the zeolite module (24) during operation.

7. The exhaust gas treatment system with pretreatment, zeolite circulation, and CO of claim 6, wherein: the zeolite module (24) is fan-shaped, and the bracket (23) and the zeolite module (24) are cylindrical after being assembled.

8. The exhaust gas treatment system with pretreatment, zeolite circulation, and CO of claim 7, wherein: CO device (3) include second shell (38), be provided with the third installation cavity in second shell (38), combustion chamber (381), catalysis room and installation have set gradually from top to bottom in the third installation cavity, be provided with third division board (39) in the catalysis room, third division board (39) form first catalysis room (382) and second catalysis room (383) with catalysis room and partition, first trachea (31) and second trachea (32) respectively with first catalysis room (382) and second catalysis room (383) are linked together.

9. The exhaust gas treatment system with pretreatment, zeolite circulation, and CO of claim 8, wherein: and a flame spraying device (384) and an exhaust port (385) are further arranged in the combustion chamber (381), and the exhaust port (385) is connected with the third air inlet (41) through an eighth pipeline (8).

10. A method of treating exhaust gas comprising an exhaust gas treatment system with pretreatment, zeolite circulation and CO according to any of claims 1 to 9, characterized in that: the method comprises the following steps:

step S1, enabling waste gas to enter the pretreatment device (1) from the air inlet pipe (11), and discharging the waste gas through the air outlet pipe (12) after the waste gas is pretreated;

step S2, enabling the waste gas discharged by the gas outlet pipe (12) and subjected to treatment to enter the first installation cavity (217) from the second gas inlet (215), adsorbing the waste gas by the zeolite module (24) which rotates into the first installation cavity (217) after desorption, enabling the adsorbed clean gas to enter the first accommodating cavity (221) and sequentially enter the second heat exchange cavity (53) through the first gas outlet (213) and the fourth gas pipe (34), heating the clean gas by the heat exchange pipe (54) and sequentially entering the second installation cavity (218) through the fifth gas pipe (35) and the first gas inlet (214) to perform desorption treatment on the zeolite module (24) which rotates into the second installation cavity (218) after desorption;

step S3, the first three-way valve (61), the second three-way valve (62) and the third three-way valve (63) are respectively controlled to enable the sixth air pipe (36) to be communicated with the third air outlet pipe (219) and the first air pipe (31), the second air pipe (32) is communicated with the second air outlet pipe (522), high-concentration waste gas generated after desorption sequentially passes through the second air outlet (216), the third air outlet pipe (219), the sixth air pipe (36), the first air pipe (31) and the first catalytic chamber (382) and then enters the combustion chamber (381) for combustion treatment, carbon dioxide after combustion sequentially passes through the exhaust port (385), the eighth pipeline (8) and the third air inlet (41) and then enters the smoke exhaust pipe (4) and is discharged to the outside through the smoke exhaust pipe, hot gas generated by combustion sequentially passes through the second catalytic chamber (383), the second air pipe (32) and the second air outlet pipe (522) and then enters the first heat exchange cavity (52) for heating of the heat exchange pipe (54) Hot gas after heat exchange enters the smoke exhaust pipe (4) through the third air pipe (33) and the third air inlet (41) and is exhausted to the outside through the smoke exhaust pipe;

step S4, the first three-way valve (61), the second three-way valve (62) and the third three-way valve (63) are respectively controlled to enable the seventh air pipe (37) to be communicated with the third air outlet pipe (219) and the second air pipe (32), the first air pipe (31) is communicated with the first air outlet pipe (521), high-concentration waste gas generated after desorption sequentially passes through the second air outlet (216), the third air outlet pipe (219), the seventh air pipe (37), the second air pipe (32) and the second catalytic chamber (383) and then enters the combustion chamber (381) for combustion treatment, carbon dioxide generated after combustion sequentially passes through the exhaust port (385), the eighth pipeline (8) and the third air inlet (41) and then enters the smoke exhaust pipe (4) and is discharged to the outside through the smoke exhaust pipe, and hot gas generated by combustion sequentially passes through the first catalytic chamber (382), the first air pipe (31) and the first air outlet pipe (521) and then enters the first heat exchange cavity (52) for heating the heat exchange pipe (54) The hot gas after heat exchange enters the smoke exhaust pipe (4) through the third air pipe (33) and the third air inlet (41) and is exhausted to the outside through the smoke exhaust pipe;

step S5, step S1 and step S2 continue, and the next loop process is performed again from step S3.

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