Waste gas treatment device for carbon fiber production

Abstract

The invention provides a waste gas treatment device for carbon fiber production, and relates to the technical field of waste gas treatment.The waste gas treatment device comprises an impurity removal box, a gas guide pipe is arranged on the other side wall of the impurity removal box, and a treatment box used for containing a waste gas dissolving solution is arranged at the end, away from the impurity removal box, of the gas guide pipe; a first sealing plate is arranged at the top of the impurity removal box, a first net rack plate arranged in the impurity removal box is arranged at the bottom of the first sealing plate, a first communicating groove communicating with the first net rack plate is formed in the inner wall of the impurity removal box, and a supporting filter screen is arranged at the position, corresponding to the first communicating groove, of the first net rack plate; a waterproof breathable film arranged in the first net rack plate is arranged on the side, close to the first communicating groove, of the supporting filter screen. A gas collecting plate is arranged on the side wall of the impurity removing box, the side, away from the impurity removing box, of the gas collecting plate communicates with the gas guide pipe, and a plurality of gas collecting holes communicating with the supporting filter screen are formed in the side, close to the first net rack plate, of the gas collecting plate. The device is reasonable in structure, good in waste gas treatment effect and good in impurity removal effect.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a waste gas treatment device for carbon fiber production. Background Art

[0002] Carbon fiber is a high-strength and high-modulus fiber with a carbon content of more than 90%. It is the best in high temperature resistance among all chemical fibers. It is made of acrylic fiber and viscose fiber through high-temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace. The main use of carbon fiber is as a reinforcing material to be compounded with resin, metal, ceramic and carbon to manufacture advanced composite materials. When producing carbon fiber, an exhaust gas treatment device for carbon fiber production is required.

[0003] In the prior art, when treating the waste gas from carbon fiber production, the first step is to use spraying to remove larger particulate impurities, and then the waste gas enters the treatment box, and is treated by the waste gas dissolving liquid in the treatment box to ensure that the waste gas meets the emission standards when it is discharged. The problem is that during the vertical spraying of liquid, the waste gas entering laterally will blow part of the sprayed liquid into the treatment box, thereby diluting the dissolving liquid inside. At the same time, the existing spraying efficiency is low (the waste gas generated in the carbon fiber production contains more large particulate impurities), and some large particulate impurities that are not treated in time will also follow the waste gas into the treatment box, thereby affecting the treatment effect of the waste gas. Moreover, when spraying the waste gas, the waste gas generally enters directly from the pipeline, which leads to uneven distribution of the waste gas, affecting the removal efficiency of large particulate impurities. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a waste gas treatment device for carbon fiber production to solve the problems raised in the above background technology. The present invention has a reasonable structure, good waste gas treatment effect, and good impurity removal effect.

[0005] In order to achieve the above object, the present invention is implemented through the following technical scheme: a waste gas treatment device for carbon fiber production, comprising: An impurity removal box, wherein an aqueous solution is configured in the impurity removal box, an air inlet pipe is arranged on one side wall of the impurity removal box, an air guide pipe is arranged on the other side wall of the impurity removal box, a treatment box for placing waste gas solution is arranged at one end of the air guide pipe away from the impurity removal box, a water pump is arranged on the top of the impurity removal box, and guide pipes penetrating the top of the impurity removal box and penetrating one side wall of the impurity removal box are arranged at both ends of the water pump; A first sealing plate is arranged on the top of the impurity removal box, a first grid plate placed inside the impurity removal box is arranged at the bottom of the first sealing plate, a first connecting groove connected to the first grid plate is opened on the inner wall of the impurity removal box, a supporting filter is arranged at a position of the first grid plate corresponding to the first connecting groove, a waterproof and breathable membrane placed inside the first grid plate is arranged on the side of the supporting filter close to the first connecting groove, an air collecting plate is arranged on the side wall of the impurity removal box, and a side of the air collecting plate away from the impurity removal box is connected to the air guide pipe; A filter assembly is provided inside the impurity removal box and is placed below the air intake pipe and is used to filter impurities in the exhaust gas sprayed with water through the guide pipe.

[0006] Furthermore, the vertical cross-sectional area of ​​the supporting filter screen is larger than the vertical cross-sectional area of ​​the waterproof breathable membrane, and the transverse cross-sectional area of ​​the first sealing plate is larger than the transverse cross-sectional area of ​​the first grid plate.

[0007] Furthermore, a stirring motor is arranged on the top of the impurity removal box, and a stirring assembly placed inside the impurity removal box is arranged on the output shaft of the stirring motor; The stirring assembly includes a rotating shaft arranged on the side wall of the stirring motor output shaft and placed inside the impurity removal box, and a plurality of stirring columns are arranged on the side wall of the rotating shaft. The end of the air guide pipe close to the impurity removal box corresponds to the stirring column at the lowest end of the side wall of the rotating shaft, and the lengths of the plurality of stirring columns increase successively from bottom to top.

[0008] Furthermore, a spray plate connected to the guide pipe is provided on the upper side of the inner wall of the impurity removal box, a plurality of nozzles connected to the guide pipe are provided at the bottom of the spray plate, a plurality of air collecting holes connected to the supporting filter are provided on the side of the air collecting plate close to the first grid plate, a second connecting groove for connecting the plurality of air collecting holes to the supporting filter is provided inside the impurity removal box, an air dispersion plate connected to the air inlet pipe is provided on the inner wall of the impurity removal box, and a plurality of air dispersion holes are provided on the side of the air dispersion plate away from the air inlet pipe.

[0009] Furthermore, a first sealing groove is provided on the top of the impurity removal box, the first sealing plate matches the first sealing groove, a first guide groove is provided inside the impurity removal box, which is placed below the first sealing groove and is respectively connected to the first sealing groove, the first connecting groove, and the second connecting groove, and the first guide groove is connected to the first grid plate.

[0010] Furthermore, the filter assembly includes a second sealing plate arranged on the side wall of the impurity removal box and placed below the air intake pipe, the side wall of the second sealing plate is provided with a second grid plate placed inside the impurity removal box, the inside of the second grid plate is provided with an impurity filter net for filtering impurities, and the side wall of the second sealing plate is provided with a force groove.

[0011] Furthermore, the cross-sectional area of ​​the impurity filter screen is larger than the cross-sectional area of ​​the inner wall of the impurity removal box, and the vertical cross-sectional area of ​​the second sealing plate is larger than the vertical cross-sectional area of ​​the second grid plate.

[0012] Furthermore, a second sealing groove matching the second sealing plate is provided on a side wall of the impurity removal box, and a second guide groove communicating with the second sealing groove and matching the second grid plate is provided inside the impurity removal box.

[0013] Furthermore, butterfly bolts are provided at the connection between the second sealing plate and the impurity removal box, and at the connection between the first sealing plate and the impurity removal box.

[0014] Furthermore, an air outlet pipe is provided at the upper end of the side of the treatment box away from the guide pipe, an exhaust gas detector is provided on the top of the treatment box, an air outlet valve is provided on the side wall of the air outlet pipe, a liquid outlet pipe is provided on the side wall of the treatment box, a liquid outlet valve is provided on the side wall of the liquid outlet pipe, a water outlet pipe is provided on the side wall of the impurity removal box, and a water outlet valve is provided on the side wall of the water outlet pipe.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: The present invention facilitates the filtration of liquid by using a waterproof and breathable membrane. Under the action of the waterproof and breathable membrane, large particles of impurities cannot pass through, thereby preventing the liquid from following the waste gas into the treatment box and affecting the treatment effect of the waste gas. The impurities filtered on the waterproof breathable membrane fall on the filter assembly for filtration under the action of the liquid flowing with the exhaust gas, which can prevent the impurities from accumulating on the waterproof breathable membrane, thereby enhancing the fluidity of the gas, and further filtering the impurities under the action of the supporting filter net, thereby improving the thoroughness of the filtration.

[0016] Under the action of the air diffusion plate and multiple air diffusion holes, the exhaust gas entering from the air intake pipe is evenly distributed inside the impurity removal box, and the large particles in the exhaust gas fall on the filter assembly through the liquid evenly sprayed from multiple nozzles, thereby increasing the exhaust gas processing area. The exhaust gas finally enters the air duct from the multiple air collecting holes of the air collecting plate, thereby enhancing the removal effect of larger solid particles in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 A three-dimensional diagram of an exhaust gas treatment device for carbon fiber production according to an embodiment of the present invention; Figure 2 is a formal cross-sectional view of an exhaust gas treatment device for carbon fiber production according to one embodiment of the present invention; Figure 3 According to an embodiment of the present invention Figure 2 A magnified view of middle; Figure 4 According to an embodiment of the present invention Figure 2 Enlarged view of middle B; Figure 5 A three-dimensional diagram of the connection between the first sealing plate and the first grid plate in an exhaust gas treatment device for carbon fiber production according to one embodiment of the present invention; Figure 6 A three-dimensional diagram of a filter assembly in an exhaust gas treatment device for carbon fiber production according to an embodiment of the present invention; In the figure: 1, impurity removal box; 1001, second sealing groove; 1002, second guide groove; 1003, first connecting groove; 2, water pump; 3, guide pipe; 4, first sealing plate; 5, first sealing groove; 6, air guide pipe; 7, treatment box; 8, stirring motor; 9, exhaust gas detector; 10, air outlet pipe; 101, air outlet valve; 11, liquid outlet pipe; 111, liquid outlet valve; 12, first grid plate; 13, first guide groove; 14, outlet Water pipe; 15. Water outlet valve; 16. Filter assembly; 161. Second sealing plate; 162. Second grid plate; 163. Impurity filter; 17. Air inlet pipe; 18. Spray plate; 181. Nozzle; 19. Stirring assembly; 191. Rotating shaft; 192. Stirring column; 20. Support filter; 21. Waterproof breathable membrane; 22. Gas collecting plate; 221. Gas collecting hole; 23. Second connecting groove; 24. Air dispersion plate; 241. Air dispersion hole. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] like Figure 1 As shown, the present invention provides a technical solution: a waste gas treatment device for carbon fiber production, comprising: A cleaning box 1, in which an aqueous solution is arranged, an air inlet pipe 17 is arranged on one side wall of the cleaning box 1, an air guide pipe 6 is arranged on the other side wall of the cleaning box 1, a treatment box 7 for placing waste gas solution is arranged on one end of the air guide pipe 6 away from the cleaning box 1, a water pump 2 is arranged on the top of the cleaning box 1, and guide pipes 3 penetrating the top of the cleaning box 1 and penetrating one side wall of the cleaning box 1 are arranged at both ends of the water pump 2; A first sealing plate 4 is arranged on the top of the impurity removal box 1, a first grid plate 12 placed inside the impurity removal box 1 is arranged at the bottom of the first sealing plate 4, a first connecting groove 1003 connected to the first grid plate 12 is opened on the inner wall of the impurity removal box 1, a supporting filter screen 20 is arranged at a position corresponding to the first connecting groove 1003 of the first grid plate 12, a waterproof and breathable membrane 21 placed inside the first grid plate 12 is arranged on the side of the supporting filter screen 20 close to the first connecting groove 1003, an air collecting plate 22 is arranged on the side wall of the impurity removal box 1, and a side of the air collecting plate 22 away from the impurity removal box 1 is connected to the air guide pipe 6; The impurity removal box 1 is provided with a filter assembly 16 placed below the air inlet pipe 17 and used to filter impurities in the exhaust gas sprayed by the guide pipe 3. This design facilitates the filtration of the liquid by using a waterproof breathable membrane 21. At the same time, large particles of impurities cannot pass through the waterproof breathable membrane 21, thereby preventing the liquid from following the exhaust gas into the treatment box 7 and affecting the treatment effect of the exhaust gas. The impurities filtered on the waterproof breathable membrane 21 fall on the filter assembly 16 for filtration under the action of the liquid flowing with the exhaust gas, which can prevent the impurities from accumulating on the waterproof breathable membrane 21, thereby enhancing the gas Regarding fluidity, most of the liquid flowing out of the guide pipe 3 through the water pump 2 will flow directly downward through the filter assembly 16 with impurities due to vertical spraying, and a small amount of liquid will follow the exhaust gas to the waterproof breathable membrane 21, thereby not affecting the exhaust gas flowing out of the air guide pipe 6. Under the action of the supporting filter net 20, the impurities are further filtered to improve the thoroughness of the filtration. In order to make a small amount of impurities on the waterproof breathable membrane 21 flow downward with the liquid, a downwardly inclined slope is provided on the lower side of the inner wall of the first connecting groove 1003 to prevent impurities from remaining on the lower side of the inner wall of the first connecting groove 1003.

[0020] Reference Figure 2 , Figure 3 and Figure 5 The vertical cross-sectional area of ​​the supporting filter net 20 is larger than the vertical cross-sectional area of ​​the waterproof breathable membrane 21. This design enables the supporting filter net 20 to fully support the waterproof breathable membrane 21. The transverse cross-sectional area of ​​the first sealing plate 4 is larger than the transverse cross-sectional area of ​​the first grid plate 12. This design facilitates limiting the downward movement position of the first grid plate 12.

[0021] Reference Figure 2A stirring motor 8 is arranged on the top of the impurity removal box 1, and a stirring assembly 19 placed inside the impurity removal box 1 is arranged on the output shaft of the stirring motor 8; the stirring assembly 19 includes a rotating shaft 191 arranged on the side wall of the output shaft of the stirring motor 8 and placed inside the impurity removal box 1, and a plurality of stirring columns 192 are arranged on the side wall of the rotating shaft 191. The end of the air guide pipe 6 close to the impurity removal box 1 corresponds to the stirring column 192 at the lowest end of the side wall of the rotating shaft 191, and the lengths of the plurality of stirring columns 192 increase from bottom to top. This design is achieved by using the end of the air guide pipe 6 and the rotating shaft 19 1 corresponds to the stirring column 192 at the lowest end of the side wall, so that when the waste gas enters the inside of the treatment box 7, the stirring column 192 at the lowest end is driven to rotate by the rotating shaft 191, and the stirring column 192 at the lowest end directly stirs the incoming waste gas to react with the dissolved liquid. At the same time, since the lengths of the plurality of stirring columns 192 increase from bottom to top, the stirring area of ​​the waste gas is increased when the waste gas moves from bottom to top, so that the waste gas and the dissolved liquid are fully dissolved, the dispersion and dissolution speed of the waste gas in the dissolved liquid is accelerated, and the treatment effect is improved.

[0022] Reference Figure 2 , Figure 3 and Figure 4 A spray plate 18 connected to the guide pipe 3 is arranged on the upper side of the inner wall of the impurity removal box 1, and a plurality of nozzles 181 connected to the guide pipe 3 are arranged at the bottom of the spray plate 18. A plurality of air collecting holes 221 connected to the supporting filter screen 20 are opened on the side of the air collecting plate 22 close to the first grid plate 12. A second connecting groove 23 for connecting the plurality of air collecting holes 221 to the supporting filter screen 20 is opened inside the impurity removal box 1. A diffuser plate 24 connected to the air inlet pipe 17 is arranged on the inner wall of the impurity removal box 1. A plurality of diffuser holes 241 are opened on the side of the diffuser plate 24 away from the air inlet pipe 17. This design uses a spray plate 18 and a nozzle 181 to allow the liquid inside the impurity removal box 1 to be sprayed out from the nozzle 181 through the water pump 2. Under the action of the diffuser plate 24 and the diffuser holes 241, the exhaust gas entering from the air intake pipe 17 is evenly distributed inside the impurity removal box 1. The liquid evenly sprayed from multiple nozzles 181 causes large particles in the exhaust gas to fall on the filter assembly 16, thereby increasing the processing area of ​​the exhaust gas. The exhaust gas finally enters the air duct 6 from the multiple air collecting holes 221 of the air collecting plate 22, thereby enhancing the removal effect of larger solid particles in the exhaust gas.

[0023] Reference Figure 2 and Figure 5A first sealing groove 5 is provided on the top of the impurity removal box 1, and a first sealing plate 4 matches the first sealing groove 5. A first guide groove 13 is provided inside the impurity removal box 1 and is placed below the first sealing groove 5 and is respectively connected with the first sealing groove 5, the first connecting groove 1003, and the second connecting groove 23. The first guide groove 13 is connected with the first grid plate 12, and a force applying handle is provided on the first sealing plate 4. This design improves the sealing of the connection by connecting the first sealing plate 4 and the first sealing groove 5. At the same time, the force applying handle applies force to the first sealing plate 4 to drive the first grid plate 12 to separate from the interior of the impurity removal box 1 along the first guide groove 13, so that the waterproof breathable membrane 21 can be replaced or cleaned.

[0024] Reference Figure 2 and Figure 6 The filter assembly 16 includes a second sealing plate 161 arranged on the side wall of the impurity removal box 1 and placed below the air intake pipe 17. The side wall of the second sealing plate 161 is provided with a second grid plate 162 placed inside the impurity removal box 1. The second grid plate 162 is provided with an impurity filter 163 for filtering impurities. The side wall of the second sealing plate 161 is provided with a force-applying groove. This design drives the second sealing plate 161 to move to the side away from the impurity removal box 1 by applying force to the force-applying groove. The second sealing plate 161 drives the second grid plate 162 to separate from the impurity removal box 1, thereby facilitating the cleaning of impurities on the impurity filter 163 inside the second grid plate 162.

[0025] Reference Figure 6 The cross-sectional area of ​​the impurity filter 163 is larger than the cross-sectional area of ​​the inner wall of the impurity removal box 1, and the vertical cross-sectional area of ​​the second sealing plate 161 is larger than the vertical cross-sectional area of ​​the second grid plate 162. This design makes it easy for impurities to fall completely on the impurity filter 163.

[0026] Reference Figure 2 and Figure 6 The side wall of the impurity removal box 1 is provided with a second sealing groove 1001 matching the second sealing plate 161, and the interior of the impurity removal box 1 is provided with a second guide groove 1002 connected with the second sealing groove 1001 and matching the second grid plate 162. This design improves the sealing of the connection by using the second sealing plate 161 to connect the second sealing groove 1001.

[0027] Reference Figure 2 , Figure 5 and Figure 6 The connection between the second sealing plate 161 and the impurity removal box 1 and the connection between the first sealing plate 4 and the impurity removal box 1 are both provided with butterfly bolts. This design improves the stability of the connection and facilitates force disassembly without the need for an external wrench.

[0028] Reference Figure 1 and Figure 2, an outlet pipe 10 is arranged at the upper end of the side of the treatment box 7 away from the guide pipe 3, and an exhaust gas detector 9 is arranged on the top of the treatment box 7, wherein the exhaust gas detector 9 detects the exhaust gas, and the exhaust gas and the dissolving liquid are all existing technologies, which is convenient for making the gas discharged from the outlet pipe 10 qualified. In order to make the exhaust gas completely treated, when the exhaust gas detector 9 detects that the exhaust gas is not completely treated, a circulating pump is arranged on the side wall of the treatment box 7 through a pipeline to send the exhaust gas from the top of the treatment box 7 to the bottom to dissolve with the dissolving liquid again, and a connecting valve is arranged on the pipeline, wherein the water pump 2 The two ends are the water inlet and the water outlet, and the water inlet and the water outlet are respectively connected with the guide pipe 3, the guide pipe 3 connected with the water inlet is connected with the side wall of the impurity removal box 1, and the guide pipe 3 at the water outlet is connected with the top of the impurity removal box 1, so as to facilitate the circulation of liquid inside the impurity removal box 1, the side wall of the air outlet pipe 10 is provided with an air outlet valve 101, the side wall of the processing box 7 is provided with a liquid outlet pipe 11, the side wall of the liquid outlet pipe 11 is provided with a liquid outlet valve 111, the side wall of the impurity removal box 1 is provided with a water outlet pipe 14, and the side wall of the water outlet pipe 14 is provided with a water outlet valve 15, which improves the rationality of the design.

[0029] Reference Figure 1-Figure 6 As an embodiment of the present invention: when it is necessary to treat the waste gas, the staff sends the waste gas to the inside of the diffuser plate 24 through the air intake pipe 17 and enters the impurity removal box 1 from the multiple diffuser holes 241, and at the same time, the water pump 2 is operated to send the liquid in the impurity removal box 1 to the inside of the spray plate 18 and spray it out from the multiple nozzles 181. The waste gas passes through the liquid sprayed from the multiple nozzles 181 in turn. Under the action of the diffuser plate 24 and the diffuser holes 241, the waste gas entering from the air intake pipe 17 is evenly distributed in the impurity removal box 1, and passes through the liquid sprayed from the multiple nozzles 181 to make most of the large particles in the waste gas. The impurities fall on the impurity filter screen 163 of the filter component 16, thereby enhancing the removal effect of larger solid particles in the exhaust gas. A small number of impurities are filtered by the waterproof breathable membrane 21 along with the exhaust gas and liquid, while preventing the liquid from following the exhaust gas into the treatment box 7 to affect the treatment effect of the exhaust gas. The impurities filtered on the waterproof breathable membrane 21 fall on the filter component 16 for filtration under the action of the liquid flowing with the exhaust gas, which can prevent impurities from accumulating on the waterproof breathable membrane 21, thereby enhancing the fluidity of the gas, and further filter the impurities under the action of the supporting filter screen 20 to improve the thoroughness of the filtration.

[0030] The filtered exhaust gas is collected inside the exhaust plate 22 through a plurality of air collecting holes 221, and finally enters the processing box 7 along the air guide pipe 6. When the stirring motor 8 drives the stirring column 192 on the rotating shaft 191 to rotate, the end of the air guide pipe 6 corresponds to the stirring column 192 at the lowest end of the side wall of the rotating shaft 191. Therefore, when the exhaust gas enters the processing box 7, the stirring column 192 at the lowest end drives the rotating shaft 191 to rotate, and the stirring column 192 at the lowest end directly stirs the incoming exhaust gas to react with the dissolved liquid. It should be treated. At the same time, since the lengths of multiple stirring columns 192 increase from bottom to top, the stirring area of ​​the exhaust gas is increased when the exhaust gas moves from bottom to top, so that the exhaust gas and the solvent are fully dissolved, the dispersion and dissolution speed of the exhaust gas in the solvent is accelerated, and the treatment effect is improved. Finally, the exhaust gas is detected under the action of the exhaust gas detector 9. If the detection is qualified, the outlet valve 101 is opened to discharge the gas. If the detection is unqualified, the circulating pump arranged on the side wall of the processing box 7 is used to send the exhaust gas from the top of the processing box 7 to the bottom through the pipeline to dissolve it with the solvent again.

[0031] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A waste gas treatment device for carbon fiber production, comprising: An impurity removal box (1), wherein an aqueous solution is arranged in the impurity removal box (1), an air inlet pipe (17) is arranged on one side wall of the impurity removal box (1), an air guide pipe (6) is arranged on the other side wall of the impurity removal box (1), a treatment box (7) for placing waste gas solution is arranged at one end of the air guide pipe (6) away from the impurity removal box (1), a water pump (2) is arranged on the top of the impurity removal box (1), and guide pipes (3) are arranged at both ends of the water pump (2) and penetrate the top of the impurity removal box (1) and penetrate the side wall of the impurity removal box (1); It is characterized in that A first sealing plate (4) is arranged on the top of the impurity removal box (1); a first grid plate (12) disposed inside the impurity removal box (1) is arranged at the bottom of the first sealing plate (4); a first connecting groove (1003) connected to the first grid plate (12) is opened on the inner wall of the impurity removal box (1); a supporting filter screen (20) is arranged at a position of the first grid plate (12) corresponding to the first connecting groove (1003); a waterproof and breathable membrane (21) disposed inside the first grid plate (12) is arranged on a side of the supporting filter screen (20) close to the first connecting groove (1003); an air collecting plate (22) is arranged on the side wall of the impurity removal box (1); a side of the air collecting plate (22) away from the impurity removal box (1) is connected to the air guide pipe (6); The impurity removal box (1) is provided with a filter assembly (16) disposed below the air intake pipe (17) and used to filter impurities in the exhaust gas sprayed with water through the guide pipe (3).

2. The waste gas treatment device for carbon fiber production according to claim 1, characterized in that: The vertical cross-sectional area of ​​the supporting filter screen (20) is larger than the vertical cross-sectional area of ​​the waterproof breathable membrane (21), and the transverse cross-sectional area of ​​the first sealing plate (4) is larger than the transverse cross-sectional area of ​​the first grid plate (12).

3. The waste gas treatment device for carbon fiber production according to claim 1, characterized in that: A stirring motor (8) is arranged on the top of the impurity removal box (1), and a stirring assembly (19) disposed inside the impurity removal box (1) is arranged on the output shaft of the stirring motor (8); The stirring assembly (19) comprises a rotating shaft (191) arranged on the side wall of the output shaft of the stirring motor (8) and placed inside the impurity removal box (1); a plurality of stirring columns (192) are arranged on the side wall of the rotating shaft (191); one end of the air guide pipe (6) close to the impurity removal box (1) corresponds to the stirring column (192) at the lowest end of the side wall of the rotating shaft (191); and the lengths of the plurality of stirring columns (192) increase in sequence from bottom to top.

4. The waste gas treatment device for carbon fiber production according to claim 1, characterized in that: A spray plate (18) connected to the guide pipe (3) is arranged on the upper side of the inner wall of the impurity removal box (1); a plurality of nozzles (181) connected to the guide pipe (3) are arranged at the bottom of the spray plate (18); a plurality of air collecting holes (221) connected to the supporting filter screen (20) are provided on a side of the air collecting plate (22) close to the first grid plate (12); a second connecting groove (23) for connecting the plurality of air collecting holes (221) to the supporting filter screen (20) is provided inside the impurity removal box (1); an air dispersion plate (24) connected to the air inlet pipe (17) is arranged on the inner wall of the impurity removal box (1); a plurality of air dispersion holes (241) are provided on a side of the air dispersion plate (24) away from the air inlet pipe (17).

5. The waste gas treatment device for carbon fiber production according to claim 4, characterized in that: The impurity removal box (1) is provided with a first sealing groove (5) on the top, the first sealing plate (4) matches the first sealing groove (5), and the impurity removal box (1) is provided with a first guide groove (13) disposed below the first sealing groove (5) and respectively connected to the first sealing groove (5), the first connecting groove (1003), and the second connecting groove (23), and the first guide groove (13) is connected to the first grid plate (12).

6. The waste gas treatment device for carbon fiber production according to claim 1, characterized in that: The filter assembly (16) comprises a second sealing plate (161) arranged on a side wall of the impurity removal box (1) and placed below the air intake pipe (17); the side wall of the second sealing plate (161) is provided with a second grid plate (162) placed inside the impurity removal box (1); an impurity filter net (163) for filtering impurities is arranged inside the second grid plate (162); and a force application groove is arranged on the side wall of the second sealing plate (161).

7. The waste gas treatment device for carbon fiber production according to claim 6, characterized in that: The cross-sectional area of ​​the impurity filter screen (163) is larger than the cross-sectional area of ​​the inner wall of the impurity removal box (1), and the vertical cross-sectional area of ​​the second sealing plate (161) is larger than the vertical cross-sectional area of ​​the second grid plate (162).

8. The waste gas treatment device for carbon fiber production according to claim 6, characterized in that: The side wall of the impurity removal box (1) is provided with a second sealing groove (1001) matching the second sealing plate (161), and the interior of the impurity removal box (1) is provided with a second guide groove (1002) connected to the second sealing groove (1001) and matching the second grid plate (162).

9. The waste gas treatment device for carbon fiber production according to claim 6, characterized in that: The connection between the second sealing plate (161) and the impurity removal box (1) and the connection between the first sealing plate (4) and the impurity removal box (1) are both provided with butterfly bolts.

10. The waste gas treatment device for carbon fiber production according to claim 1, characterized in that: An air outlet pipe (10) is arranged at the upper end of the side of the treatment box (7) away from the guide pipe (3); an exhaust gas detector (9) is arranged on the top of the treatment box (7); an air outlet valve (101) is arranged on the side wall of the air outlet pipe (10); a liquid outlet pipe (11) is arranged on the side wall of the treatment box (7); a liquid outlet valve (111) is arranged on the side wall of the liquid outlet pipe (11); a water outlet pipe (14) is arranged on the side wall of the impurity removal box (1); and a water outlet valve (15) is arranged on the side wall of the water outlet pipe (14).

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