A multi-stage gas filtration device for carbon paper purification

Abstract

The utility model discloses a multistage gas filter device for carbon paper purification belongs to carbon paper purification field. A multistage gas filter device for carbon paper purification, including device box, the inner wall of assembly pipe and air inlet pipe is provided with sealed air inlet mechanism, the inner wall of filter cavity and filter screen board and the surface of HEPA filter screen is provided with replacement anti - jam mechanism, the inside of device box is provided with reflux filter mechanism. The utility model not only makes multistage gas filter device inside pressure more stable when using, ensures multistage gas filter device can stably run under different working conditions, makes multistage gas filter device when using can avoid the phenomenon of influencing the purification effect of gas because of the saturation or jam of filter screen board and HEPA filter screen, can maintain the filtration efficiency to gas, and make multistage gas filter device when using can ensure that the purification quality of gas is stable and reliable, thereby further guaranteeing the purification effect to carbon paper.

Description

Technical Field

[0001] This utility model relates to the field of carbon paper purification technology, and in particular to a multi-stage gas filtration device for carbon paper purification. Background Technology

[0002] Carbon paper purification refers to the process of removing impurities from carbon paper through specific technological means to improve its purity and performance. The use of multi-stage gas filtration devices in the carbon paper purification process is mainly to ensure the high purity of the gas and meet the strict requirements of production or experimentation. However, the filtration effect of existing multi-stage gas filtration devices needs to be further improved. In order to meet market needs, a multi-stage gas filtration device for carbon paper purification is required.

[0003] A search revealed Chinese patent authorization number 201720647017.5, which discloses a multi-stage gas filtration device, including a main body and a filter layer. The main body contains a partition that divides it into left and right filter chambers, with a gap between the upper end of the partition and the top of the main body. The multi-stage gas filtration device in the aforementioned patent has the following shortcomings: Firstly, the existing multi-stage gas filtration device does not provide adequate sealing during operation, resulting in unstable internal pressure and preventing stable operation under different conditions. Secondly, existing multi-stage gas filtration devices do not allow for regular replacement of the filter plates and HEPA filters, leading to saturation or clogging of these filters and affecting gas purification efficiency. Furthermore, the existing multi-stage gas filtration devices typically lack a recirculation and re-filtration function, which means that the purified gas quality cannot be guaranteed to be stable and reliable, and the purification effect on carbon paper cannot be assured. Utility Model Content

[0004] The purpose of this invention is to solve the problems of insufficient sealing effect of multi-stage gas filtration devices in the prior art, inability to replace filter plates and HEPA filters regularly, and lack of reflux re-filtration function. Therefore, this invention proposes a multi-stage gas filtration device for carbon paper purification.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-stage gas filtration device for carbon paper purification includes a device housing. The housing has an internal filtration chamber containing a filter screen, a HEPA filter, and an activated carbon filter with an activated carbon adsorption layer. An air inlet pipe is mounted on the surface of the housing, and an assembly pipe is attached to its surface. A sealing air inlet mechanism is provided between the assembly pipe and the inner wall of the air inlet pipe. Replacement and anti-clogging mechanisms are provided on the inner wall of the filtration chamber and the surfaces of the filter screen and HEPA filter. A reflux re-filtration mechanism is located inside the housing.

[0007] As a preferred technical solution of this application, mounting seats are symmetrically installed on the surface of the bottom position of the activated carbon filter. The mounting seats are connected to the inner wall of the filter chamber by fastening screws. A detachable door is provided on one side of the device housing. A fixing pipe is installed on the surface of the activated carbon filter. An installation pipe is provided on the surface of the fixing pipe. The installation pipe and the fixing pipe are connected by bolts. A solenoid valve is fitted on the surface of the installation pipe. A connecting pipe is installed on the surface of the activated carbon filter away from the fixing pipe. An exhaust pipe is provided on the surface of the connecting pipe.

[0008] As a preferred technical solution of this application, the device housing has an internal gas storage chamber, the inner wall of which is equipped with a gas purity analyzer. The inner wall of the device housing also has heat dissipation holes. A dust filter is provided on one side of the device housing, and the dust filter is connected to the device housing via fastening screws. An L-shaped frame is provided at the corner of the bottom of the device housing, and the L-shaped frame is connected to the device housing via assembly studs. A mounting base is installed on the bottom surface of the L-shaped frame, and mounting screws are threaded onto the surface of the mounting base. The assembly pipe is connected to the air inlet pipe via assembly screws. An air outlet assembly is provided on the surface of the device housing.

[0009] As a preferred technical solution of this application, the sealing air intake mechanism includes an annular sealing ring disposed on the inner wall of the assembly pipe, a fixing block disposed on the surface of the annular sealing ring, a silicone ring disposed on the inner wall of the air intake pipe, and a rubber gasket disposed on the inner wall of the silicone ring.

[0010] As a preferred technical solution of this application, the replacement anti-clogging mechanism consists of a U-shaped seat disposed on the inner wall of the filter chamber, a guide block disposed on the surface of the filter screen and the HEPA filter screen, a guide groove disposed on the inner wall of the U-shaped seat, a clamping plate disposed on the inner wall of the U-shaped seat, and a mounting screw disposed on the surface of the U-shaped seat.

[0011] As a preferred technical solution of this application, the reflux refiltration mechanism consists of a holding chamber disposed inside the device housing, a reflux water pump disposed inside the holding chamber, a pipe disposed inside the air storage chamber, an air intake pipe disposed at the input end of the reflux water pump, a reflux pipe disposed at the output end of the reflux water pump, and an air outlet cover disposed on the surface of the reflux pipe.

[0012] Compared with the prior art, this utility model provides a multi-stage gas filtration device for carbon paper purification, which has the following beneficial effects:

[0013] 1. This multi-stage gas filtration device for carbon paper purification, through its sealed air inlet mechanism, enables more stable internal pressure during use, ensuring stable operation of the multi-stage gas filtration device under different working conditions, and solving the problem of insufficient sealed air inlet effect in the prior art.

[0014] 2. This multi-stage gas filtration device for carbon paper purification, through its replacement and anti-clogging mechanism, avoids the phenomenon that the gas purification effect is affected by the saturation or clogging of the filter screen and HEPA filter. At the same time, it can maintain the gas filtration efficiency, solving the problem that the filter screen and HEPA filter cannot be replaced regularly in the prior art.

[0015] 3. This multi-stage gas filtration device for carbon paper purification, through its reflux re-filtration mechanism, ensures stable and reliable gas purification quality, thereby further guaranteeing the purification effect on carbon paper and solving the problem that existing technologies typically lack the function of reflux re-filtration. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0018] Figure 3 For the present utility model Figure 2 A magnified cross-sectional view of a medium-sized activated carbon filter;

[0019] Figure 4 For the present utility model Figure 2 Enlarged structural schematic diagram of the central sealing air intake mechanism;

[0020] Figure 5 For the present utility model Figure 2 An enlarged structural diagram of the anti-clogging mechanism in the middle;

[0021] Figure 6 For the present utility model Figure 2A magnified schematic diagram of the intermediate recirculation and refiltration mechanism.

[0022] In the picture:

[0023] 1. Device housing; 11. Controller; 12. Door; 13. Exhaust assembly; 101. Filter chamber; 102. Filter screen; 103. HEPA filter; 104. Activated carbon filter; 105. L-shaped frame; 106. Gas storage chamber; 107. Gas purity analyzer; 108. Exhaust pipe; 109. Mounting base; 110. Activated carbon adsorption layer; 111. Fixing pipe; 112. Mounting pipe; 113. Solenoid valve; 114. Bolt; 115. Connecting pipe; 116. Mounting stud; 117. Fastening screw; 118. Assembly nail; 119. Assembly pipe; 120. Intake pipe; 121. Fastening screw; 122. Heat dissipation hole; 123. Dust filter; 124. Assembly stud; 125. Mounting screw; 126. Mounting base; 2. Sealing intake mechanism; 21. Rubber gasket; 22. Silicone ring; 23. Annular sealing ring; 24. Fixing block; 3. Replacement anti-clogging mechanism; 31. U-shaped seat; 32. Clamping plate; 33. Mounting screw; 34. Guide groove; 35. Guide block; 4. Recirculation and re-filtration mechanism; 41. Recirculation pipe; 42. Exhaust hood; 43. Reservoir; 44. Recirculation water pump; 45. Pipe; 46. Suction pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Reference Figure 1-3A multi-stage gas filtration device for carbon paper purification includes a housing 1, a filter chamber 101 inside the housing 1, a filter screen 102 inside the filter chamber 101, a HEPA filter 103 inside the filter chamber 101, an activated carbon filter 104 inside the filter chamber 101, mounting seats 109 symmetrically mounted on the bottom surface of the activated carbon filter 104, and the mounting seats 109 are connected to the inner wall of the filter chamber 101 by fastening screws 117. A controller 11 is mounted on the surface of the housing 1, the controller 11 being of the LA series. A removable door 12 is provided on one side of the housing 1. Activated carbon adsorption cells are installed inside the activated carbon filter 104. Layer 110, the number of activated carbon adsorption layers 110 is two sets, the surface of activated carbon filter 104 is equipped with a fixing tube 111, the surface of fixing tube 111 is provided with an installation tube 112, the installation tube 112 is connected to the fixing tube 111 by bolts 114, one end of the installation tube 112 extends into the interior of fixing tube 111 and activated carbon filter 104, the surface of installation tube 112 is fitted with a solenoid valve 113, the model of which can be TM series, the input end of solenoid valve 113 is electrically connected to the output end of controller 11, the surface of activated carbon filter 104 away from fixing tube 111 is equipped with a connecting tube 115, the surface of connecting tube 115 is provided with an exhaust pipe body 108, the exhaust pipe body 108 is connected to the connecting tube 115. The components 15 are connected by mounting studs 116. Connecting pipe 115 communicates with the interior of activated carbon filter 104, and fixing pipe 111 also communicates with the interior of activated carbon filter 104. A gas storage chamber 106 is provided inside the device housing 1. One end of exhaust pipe 108 extends into the gas storage chamber 106. A gas purity analyzer 107 is installed on the inner wall of the gas storage chamber 106. The gas purity analyzer 107 can be an HKKP series model. The output terminal of the gas purity analyzer 107 is electrically connected to the input terminal of controller 11. Heat dissipation holes 122 are provided on the inner wall of the device housing 1. A dust filter 123 is provided on one side of the device housing 1, and the dust filter 123 is connected to the device housing 1 by fastening screws 121. An L-shaped bracket 105 is installed at the corner of the bottom of the housing 1. The L-shaped bracket 105 is connected to the housing 1 via assembly studs 124. A mounting base 126 is installed on the surface of the bottom of the L-shaped bracket 105. A mounting pin 125 is threaded onto the surface of the mounting base 126. The bottom end of the mounting pin 125 passes through the mounting base 126 and extends to the bottom of the mounting base 126. An air inlet pipe 120 is installed on the surface of the housing 1. One end of the air inlet pipe 120 extends into the interior of the housing 1. An assembly pipe 119 is installed on the surface of the air inlet pipe 120. One end of the assembly pipe 119 extends into the interior of the air inlet pipe 120 and communicates with the air inlet pipe 120. The assembly pipe 119 and the air inlet pipe 120 are connected via assembly pins 118.A gas outlet assembly 13 is provided on the surface of the device housing 1. The gas outlet end of the gas purity analyzer 107 is connected to the interior of the gas outlet assembly 13. The bottom end of the gas outlet assembly 13 extends into the interior of the gas storage chamber 106 and is connected to the interior of the gas storage chamber 106.

[0027] Reference Figure 2 and Figure 4 Furthermore, the assembly pipe 119 and the air inlet pipe 120 are equipped with a sealing air inlet mechanism 2. The sealing air inlet mechanism 2 includes an annular sealing ring 23 on the inner wall of the assembly pipe 119, a fixing block 24 on the surface of the annular sealing ring 23, a silicone ring 22 on the inner wall of the air inlet pipe 120, and a rubber gasket 21 on the inner wall of the silicone ring 22. The annular sealing ring 23 is installed on the inner wall of the assembly pipe 119, and the fixing block 24 is installed on the surface of the annular sealing ring 23. The fixing block 24 engages with the inner wall of the air inlet pipe 120. The silicone ring 22 is installed on the inner wall of the air inlet pipe 120, and the rubber gasket 21 is installed on the inner wall of the silicone ring 22. The inner wall of the rubber gasket 21 is in close contact with the surface of the assembly pipe 119. By setting up the sealing air inlet mechanism, the internal pressure of the multi-stage gas filtration device can be made more stable during use, ensuring that the multi-stage gas filtration device can operate stably under different working conditions.

[0028] Reference Figure 2 and Figure 5 Furthermore, the filter chamber 101 and the surfaces of the filter plate 102 and HEPA filter 103 are provided with a replacement anti-clogging mechanism 3. The replacement anti-clogging mechanism 3 consists of a U-shaped seat 31 provided on the inner wall of the filter chamber 101, guide blocks 35 provided on the surfaces of the filter plate 102 and HEPA filter 103, guide grooves 34 provided on the inner wall of the U-shaped seat 31, clamping plates 32 provided on the inner wall of the U-shaped seat 31, and mounting screws 33 provided on the surface of the U-shaped seat 31. The U-shaped seat 31 is installed on the inner wall of the filter chamber 101, and the U-shaped seat 31 is located on the filter plate 102 and HEPA filter 103 respectively. At both ends of the filter plate 102 and the HEPA filter 103, guide grooves 34 are provided on the inner wall of the U-shaped seat 31. Guide blocks 35 are installed on the surfaces of both ends of the filter plate 102 and the HEPA filter 103. The guide blocks 35 slide and engage with the inner wall of the guide grooves 34. A clamping plate 32 is provided on the inner wall of the U-shaped seat 31. A mounting screw 33 is threadedly connected to the surface of the U-shaped seat 31. One end of the mounting screw 33 passes through the U-shaped seat 31 and rotates and engages with the surface of the clamping plate 32. The inner wall of the clamping plate 32 contacts the surfaces of the filter plate 102 and the HEPA filter 103 respectively. By setting a replacement anti-clogging mechanism, the phenomenon that the purification effect of gas is affected by the saturation or clogging of the filter plate 102 and the HEPA filter 103 can be avoided, and the filtration efficiency of gas can be maintained.

[0029] Reference Figure 2and Figure 6 Furthermore, the device housing 1 also includes a recirculation and re-filtration mechanism 4 installed inside. The recirculation and re-filtration mechanism 4 consists of a holding chamber 43 inside the device housing 1, a recirculation water pump 44 inside the holding chamber 43, a pipe 45 inside the air storage chamber 106, an air intake pipe 46 at the input end of the recirculation water pump 44, a recirculation pipe 41 at the output end of the recirculation water pump 44, and an air outlet hood 42 on the surface of the recirculation pipe 41. The holding chamber 43 is located inside the device housing 1, and the recirculation water pump 44 is installed inside the holding chamber 43. The model of the recirculation water pump 44 can be Q. In the JB series, the input of the reflux pump 44 is electrically connected to the output of the controller 11. An air intake pipe 46 is installed at the input of the reflux pump 44, with one end extending into the gas storage chamber 106. A pipe 45 is installed inside the gas storage chamber 106, connected to the air intake pipe 46 by screws, and the pipe 45 communicates with the interior of the air intake pipe 46. A reflux pipe 41 is installed at the output of the reflux pump 44, with one end penetrating the device housing 1 and extending into the filter chamber 101. An exhaust hood 42, communicating with the reflux pipe 41, is installed on the surface of the reflux pipe 41. By setting up a reflux re-filtration mechanism, the stable and reliable purification quality of the gas can be ensured, thereby further guaranteeing the purification effect on the carbon paper.

[0030] Specifically, when using the multi-stage gas filtration device for carbon paper purification: First, the user assembles the L-shaped frame 105 at the corner of the device housing 1 by tightening the assembly studs 124. Then, the user places the device housing 1 in the designated position and tightens the mounting pins 125 on the surface of the mounting base 126. Under the action of the mounting pins 125, the device housing 1 is installed in the designated position for use. Then, the user assembles the assembly tube 119 on the surface of the air inlet pipe 120 by using the assembly pins 118. Then, the user assembles the activated carbon filter 104 inside the filter chamber 101 by tightening the fastening screws 117 on the surface of the mounting base 109. Then, the user installs the mounting tube 112 and the fixing tube 111 together by using bolts 114. Finally, the user assembles the exhaust pipe 108 on the surface of the connecting pipe 115 by tightening the mounting studs 116, so that the exhaust pipe 108 is connected to the inside of the gas storage chamber 106. After adsorption and catalytic conversion, the gas enters the interior of the filter chamber 101 through the assembly pipe 119 and the inlet pipe 120. Large particulate impurities in the gas are removed by the filter screen 102. Subsequently, the gas passes through the surface of the HEPA filter 103, where fine particles are removed. Then, the controller 11 opens the solenoid valve 113, and the gas enters the interior of the activated carbon filter 104 through the mounting pipe 112 and the fixing pipe 111. The activated carbon adsorption layer 110 inside the activated carbon filter 104 removes residual impurities in the gas. Organic matter is adsorbed to ensure the gas purity meets requirements. The treated gas is discharged into the gas storage chamber 106 through the connecting pipe 115 and the exhaust pipe 108. The purity of the filtered gas is monitored in real time by the gas purity analyzer 107, and the monitoring results are displayed on the surface of the controller 11. When the filtered gas meets the purity requirements, the controller 11 controls the valve on the surface of the gas outlet assembly 13 to open, and the treated gas with the required purity is discharged through the gas outlet end of the gas purity analyzer 107 through the gas outlet assembly 13, so that the filtered gas can be used in the carbon paper production process. The gas outlet assembly 13 is composed of components such as valves and exhaust pipes. The specific composition and working principle of the gas outlet assembly 13 are existing technologies, and the specific composition and working principle of the gas purity analyzer 107 are also existing technologies, and will not be described in detail here.

[0031] Subsequently, when the user assembles the assembly tube 119 onto the surface of the air inlet pipe 120 using the assembly pin 118, the annular sealing ring 23 on the inner wall of the assembly tube 119 drives the fixing block 24 to move, causing the fixing block 24 to engage with the inner wall of the corresponding air inlet pipe 120. Under the action of the annular sealing ring 23, a seal is formed between the assembly tube 119 and the air inlet pipe 120. When one end of the assembly tube 119 moves into the interior of the air inlet pipe 120, the rubber gasket 21 on the inner wall of the air inlet pipe 120 moves to contact the inner wall of the assembly tube 119. Under the combined action of the silicone ring 22 and the rubber gasket 21, a seal is formed between the assembly tube 119 and the air inlet pipe 120 to prevent air leakage. This results in higher air tightness when gas enters the filter chamber 101 through the assembly tube 119 and the air inlet pipe 120, thereby achieving the function of sealing the air intake of the multi-stage gas filter. This makes the internal pressure of the multi-stage gas filter more stable during use, ensuring that the multi-stage gas filter can operate stably under different working conditions.

[0032] Subsequently, after prolonged use, the surfaces of filter plate 102 and HEPA filter 103 are prone to clogging, affecting the filtration efficiency of the gas. After removing the door 12 from the surface of the device housing 1, the user loosens the mounting screws 33 on the surface of the U-shaped seat 31, causing the mounting screws 33 to move the clamping plate 32 away from the surfaces of filter plate 102 and HEPA filter 103. The user then pulls the filter plate 102 and HEPA filter 103 outwards, causing the filter plate 102 and HEPA filter 103 to slide along the inner wall of the guide groove 34, driven by the guide groove 34 and the guide block 35. The guide groove 34 and the guide block 35 work together to guide the filter plate 102 and HEPA filter 103, making them easier to remove. Replaced filter plates 102 and HEPA filters 103 are then placed... Placed on the surface of the U-shaped base 31, the user pushes the filter plate 102 and HEPA filter 103, causing the filter plate 102 and HEPA filter 103 to slide along the guide block 35 on the inner wall of the guide groove 34. After the filter plate 102 and HEPA filter 103 are pushed to the desired position, the user tightens the mounting screw 33, causing the mounting screw 33 to move the clamping plate 32. Under the combined action of the clamping plate 32 and the mounting screw 33, the filter plate 102 and HEPA filter 103 are pressed and fixed between the U-shaped base 31, so as to realize the function of convenient replacement of filter plate 102 and HEPA filter 103 in the multi-stage gas filtration device. This avoids the phenomenon that the purification effect of gas is affected by the saturation or blockage of filter plate 102 and HEPA filter 103 when the multi-stage gas filtration device is used, and at the same time, it can maintain the filtration efficiency of gas.

[0033] Subsequently, under normal conditions, the gas entering the gas storage chamber 106 after filtration meets the gas purity requirements for carbon paper production. If the gas purity analyzer 107 detects that the gas purity inside the gas storage chamber 106 does not meet the requirements, the gas purity analyzer 107 sends a signal to the controller 11. After receiving the signal from the gas purity analyzer 107, the controller 11 automatically controls the return water pump 44 inside the holding chamber 43 to work. Under the action of the return water pump 44, the gas inside the gas storage chamber 106 is sucked out through the pipe 45 and the suction pipe 46, and returned to the filter chamber 101 through the return pipe 41 and the exhaust hood 42, so that the gas can be filtered again through the filter chamber 101, the filter screen 102 and the activated carbon filter 104, so that the gas can be filtered to the purity required for carbon paper production. The controller 11 controls the gas flow rate of the reflux pump 44 and reasonably controls the reflux ratio, so that the device housing 1 can withstand the pressure and flow changes brought about by the reflux when filtering gases that do not meet the requirements. This enables the multi-stage gas filtration device to perform reflux and re-filtration, ensuring stable and reliable gas purification quality when the multi-stage gas filtration device is used. This further guarantees the purification effect on the carbon paper. The heat generated by the reflux pump 44 during operation is discharged through the heat dissipation hole 122. By tightening the fastener 121, the dust filter 123 is installed on the surface of the device housing 1. Under the action of the dust filter 123, the dust can be reduced from entering the interior of the holding chamber 43 through the heat dissipation hole 122, thus reducing the possibility of dust malfunctioning or being damaged by the reflux pump 44. Finally, the multi-stage gas filtration device is put into use.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-stage gas filtration device for carbon paper purification, comprising a device housing (1), characterized in that: The device housing (1) has a filter chamber (101) inside, a filter screen plate (102) inside the filter chamber (101), a HEPA filter (103) inside the filter chamber (101), an activated carbon filter (104) inside the filter chamber (101), an activated carbon adsorption layer (110) inside the activated carbon filter (104), an air inlet pipe (120) on the surface of the device housing (1), an assembly pipe (119) on the surface of the air inlet pipe (120), a sealing air inlet mechanism (2) on the inner wall of the assembly pipe (119) and the air inlet pipe (120), a replacement anti-clogging mechanism (3) on the inner wall of the filter chamber (101) and the surface of the filter screen plate (102) and the HEPA filter (103), and a reflux re-filtration mechanism (4) inside the device housing (1).

2. The multi-stage gas filtration device for carbon paper purification according to claim 1, characterized in that: The activated carbon filter (104) has mounting bases (109) symmetrically installed on its bottom surface. The mounting bases (109) are connected to the inner wall of the filter chamber (101) by fastening screws (117). A detachable door (12) is provided on one side of the device housing (1). A fixing pipe (111) is installed on the surface of the activated carbon filter (104). An installation pipe (112) is provided on the surface of the fixing pipe (111). The installation pipe (112) is connected to the fixing pipe (111) by bolts (114). A solenoid valve (113) is fitted on the surface of the installation pipe (112). A connecting pipe (115) is installed on the surface of the activated carbon filter (104) away from the fixing pipe (111). An exhaust pipe (108) is provided on the surface of the connecting pipe (115).

3. The multi-stage gas filtration device for carbon paper purification according to claim 1, characterized in that: The device housing (1) has an internal gas storage chamber (106), and a gas purity analyzer (107) is installed on the inner wall of the gas storage chamber (106). The inner wall of the device housing (1) has heat dissipation holes (122). A dustproof net (123) is provided on one side of the device housing (1), and the dustproof net (123) is connected to the device housing (1) by fastening nails (121). An L-shaped [something] is provided at the corner of the bottom of the device housing (1). The L-shaped frame (105) is connected to the device housing (1) by assembly studs (124). A mounting base (126) is installed on the surface of the bottom of the L-shaped frame (105). A mounting pin (125) is threaded onto the surface of the mounting base (126). The assembly pipe (119) is connected to the air inlet pipe (120) by assembly pins (118). An air outlet assembly (13) is provided on the surface of the device housing (1).

4. A multi-stage gas filtration device for carbon paper purification according to claim 1, characterized in that: The sealing air intake mechanism (2) includes an annular sealing ring (23) disposed on the inner wall of the assembly pipe (119), a fixing block (24) disposed on the surface of the annular sealing ring (23), a silicone ring (22) disposed on the inner wall of the air intake pipe (120), and a rubber gasket (21) disposed on the inner wall of the silicone ring (22).

5. A multi-stage gas filtration device for carbon paper purification according to claim 1, characterized in that: The replacement anti-clogging mechanism (3) consists of a U-shaped seat (31) disposed on the inner wall of the filter chamber (101), a guide block (35) disposed on the surface of the filter screen plate (102) and the HEPA filter screen (103), a guide groove (34) disposed on the inner wall of the U-shaped seat (31), a clamping plate (32) disposed on the inner wall of the U-shaped seat (31), and a mounting screw (33) disposed on the surface of the U-shaped seat (31).

6. A multi-stage gas filtration device for carbon paper purification according to claim 1, characterized in that: The recirculation and refiltration mechanism (4) consists of a holding chamber (43) inside the device housing (1), a recirculation water pump (44) inside the holding chamber (43), a pipe (45) inside the air storage chamber (106), an air intake pipe (46) at the input end of the recirculation water pump (44), a recirculation pipe (41) at the output end of the recirculation water pump (44), and an air outlet cover (42) on the surface of the recirculation pipe (41).

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