Extruder waste gas treatment device

Abstract

The utility model discloses an extruder waste gas treatment device which comprises a dust removal assembly, a membrane separation assembly and an absorption assembly, the dust removal assembly comprises a dust removal device shell, a first filter screen and a second filter screen are sequentially installed in the dust removal device shell, the aperture of filter holes in the first filter screen is larger than that of filter holes in the second filter screen, and the membrane separation assembly comprises a membrane separation assembly and an absorption assembly. The first filter screen is arranged on one side close to the air inlet of the dust removal device shell; the membrane separation assembly comprises a membrane separation device shell and a condensing device, and the membrane separation device shell is communicated with the dust removal device shell. According to the utility model, the dust removal assembly is arranged for treating particulate matters such as dust in waste gas, so that the waste gas enters the membrane separation assembly for propylene separation after being treated by the dust removal assembly, and harmful components in the waste gas from which propylene is separated by the membrane separation assembly are absorbed by the absorption assembly; the waste gas treatment capacity is improved, so that the treated waste gas reaches the standard when being discharged.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically relating to a waste gas treatment device for an extruder. Background Technology

[0002] An extruder is a widely used piece of machinery in industrial production, primarily used to process materials into desired shapes and sizes through extrusion. When extruding plastics, the heating and melting process generates waste gas. This waste gas typically has a pungent odor and is at a high temperature, requiring treatment by a waste gas treatment system.

[0003] Because the waste gas generated during plastic processing contains a large amount of propylene, membrane separation devices are usually used to recover the propylene from the waste gas. However, the existing waste gas contains a large amount of dust particles that will enter the membrane separation device, affecting the membrane separation device's recovery of propylene. At the same time, the waste gas also contains other harmful components that cannot be treated, resulting in the emission of waste gas failing to meet standards.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide an extruder exhaust gas treatment device that can solve the problem that particulate matter such as dust affects the recovery of propylene by the membrane separation device and other harmful components cannot be treated.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0007] An extruder exhaust gas treatment device, comprising:

[0008] A dust removal assembly includes a dust removal device housing, which is used to filter particulate matter such as dust in exhaust gas. A first filter and a second filter are sequentially installed inside the dust removal device housing. These two filters sequentially intercept and filter particulate matter in the exhaust gas entering the dust removal device housing, ensuring that the particulate matter in the exhaust gas is completely filtered out. The pore size of the first filter is larger than that of the second filter. The first filter is positioned near the air inlet of the dust removal device housing, so that the exhaust gas entering the dust removal device housing first undergoes preliminary filtration through the larger pore size of the first filter, and then undergoes thorough filtration through the smaller pore size of the second filter, ensuring that the particulate matter in the exhaust gas is completely filtered out.

[0009] The membrane separation module includes a membrane separation device housing and a condenser. The membrane separation device housing is connected to a dust removal device housing, allowing the dust removal device housing to filter dust and other particulate matter from the exhaust gas before conveying it to the membrane separation device housing. This minimizes the amount of particulate matter in the exhaust gas entering the membrane separation device housing, preventing the particulate matter from affecting the propylene separation process of the membrane separation module. A separation membrane body is installed inside the membrane separation device housing. When the exhaust gas enters the membrane separation device housing, the separation of propylene from the exhaust gas is achieved through the separation membrane body. The membrane separation device housing is connected to the condenser, allowing the separated propylene gas to enter the condenser after separation by the separation membrane body. The condenser contains multiple condensing plates. The propylene gas entering the condenser is condensed by the condensing plates and then recovered. The multiple condensing plates are arranged in an alternating manner within the condenser, ensuring sufficient contact between the propylene gas entering the condenser and the condensing plates, thus improving the condensation efficiency of the propylene.

[0010] The absorption assembly includes an absorption device housing. An activated carbon layer is installed inside the absorption device housing. A pair of second sliding grooves are formed on the inner sidewalls of the front and rear end plates of the absorption device housing. The two ends of the activated carbon layer are slidably connected to the pair of second sliding grooves. The absorption device housing is connected to a membrane separation device housing. This allows the waste gas to enter the absorption device housing after propylene separation is completed in the membrane separation device housing. The activated carbon layer inside the absorption device housing then treats other harmful components in the waste gas, utilizing the adsorption properties of the activated carbon to absorb these harmful components, ensuring that the emitted waste gas meets emission standards. Furthermore, the activated carbon layer is slidably installed inside the absorption device housing, making it easy to replace.

[0011] In one or more embodiments of this utility model, two pairs of first sliding grooves are provided on the inner sidewalls of the upper and lower end panels of the dust removal device housing. The two ends of the first and second filter screens are slidably connected to the two pairs of first sliding grooves, allowing the first and second filter screens to be slidably installed inside the dust removal device housing. This facilitates the cleaning of the first and second filter screens. Simultaneously, the first and second filter screens are installed between the upper and lower end panels of the dust removal device housing, allowing for the removal of residual particles inside the dust removal device housing through their installation points. A first mounting plate is installed at the outer end of both the first and second filter screens on the dust removal device housing, facilitating the removal of the first and second filter screens from the dust removal device housing for cleaning.

[0012] In one or more embodiments of this utility model, a first flow equalization shell is fixedly connected to the inner side wall of the air inlet of the dust removal device housing. The first flow equalization shell has a plurality of first flow equalization holes on the side wall away from the air inlet of the dust removal device housing, so that the exhaust gas entering the dust removal device housing is diverted through the first flow equalization holes and then filtered through the first filter screen and the second filter screen, thereby increasing the filtration area of ​​the first filter screen and the second filter screen for exhaust gas, thereby improving the treatment efficiency of exhaust gas.

[0013] In one or more embodiments of this utility model, a plurality of first flow equalization holes are uniformly arranged in a ring shape, and the first flow equalization holes are inclined in a way that diffuses outward, so that the exhaust gas can diffuse through the first flow equalization holes, thereby increasing the area of ​​exhaust gas distribution in the dust removal device housing, and thus increasing the contact area between the exhaust gas and the first filter screen and the second filter screen.

[0014] In one or more embodiments of this utility model, an air inlet pipe is fixedly connected to the outer wall of the air inlet of the dust removal device housing, through which the exhaust gas generated by the extruder is transported to the dust removal device housing for treatment. A first conveying pipe is fixedly connected to the outer wall of the air outlet of the dust removal device housing, through which the treated exhaust gas inside the dust removal device housing is discharged.

[0015] In one or more embodiments of this utility model, an air inlet is provided at the bottom of the membrane separation device housing, and the end of the first conveying pipe away from the dust removal device housing is fixedly connected to the air inlet, so that the exhaust gas discharged from the dust removal device housing is conveyed to the membrane separation device housing for treatment through the first conveying pipe.

[0016] In one or more embodiments of this utility model, a first air outlet is provided on the upper side of the side wall of the membrane separation device housing. A second conveying pipe is fixedly connected to the outer side of the first air outlet. The end of the second conveying pipe away from the membrane separation device housing is fixedly connected to the air inlet of the condensing device. When the waste gas enters the membrane separation device housing and is separated by the membrane body, the separated propylene gas can be conveyed to the condensing device for condensation through the second conveying pipe. A drain outlet is provided at the bottom of the condensing device. After the propylene is condensed by the condensing plate in the condensing device, it is discharged through the drain outlet.

[0017] In one or more embodiments of this utility model, a second air outlet is provided on the top wall panel of the membrane separation device housing, and a third conveying pipe is fixedly connected to the second air outlet. The waste gas after propylene separation is discharged through the second air outlet inside the membrane separation device housing.

[0018] In one or more embodiments of this utility model, the end of the third conveying pipe away from the second outlet is fixedly connected to the outer wall of the air inlet of the absorption device housing, so that the waste gas discharged through the second outlet is conveyed to the absorption device housing for treatment through the third conveying pipe. An exhaust pipe is fixedly connected to the outer wall of the air outlet of the absorption device housing, and the waste gas treated in the absorption device housing is discharged through the exhaust pipe.

[0019] In one or more embodiments of this utility model, a second flow equalization shell is fixedly connected to the inner sidewall of the air inlet of the absorption device housing. The second flow equalization shell has multiple second flow equalization holes on its sidewall away from the air inlet of the absorption device housing. These holes are uniformly arranged in a ring shape and are inclined outwards. The waste gas entering the absorption device housing is diffused and divided through the second flow equalization holes, resulting in a uniform distribution of the waste gas within the housing. This increases the contact area between the waste gas and the activated carbon layer, thereby improving the absorption effect of the activated carbon layer on harmful components in the waste gas.

[0020] Compared with the prior art, this utility model is equipped with a dust removal component to treat particulate matter such as dust in the exhaust gas. The exhaust gas is treated by the dust removal component and then enters the membrane separation component for propylene separation. The exhaust gas with propylene separated by the membrane separation component is then absorbed by the absorption component to absorb the harmful components in the exhaust gas, thereby improving the exhaust gas treatment capacity and ensuring that the treated exhaust gas meets the emission standards. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a front view of an extruder exhaust gas treatment device according to an embodiment of the present invention;

[0023] Figure 2 This is a perspective view of an extruder exhaust gas treatment device according to an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of an extruder exhaust gas treatment device according to an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of an extruder exhaust gas treatment device according to one embodiment of the present invention;

[0026] Figure 5This is an exploded view of an extruder exhaust gas treatment device according to an embodiment of the present invention;

[0027] Figure 6 This utility model Figure 4 A schematic diagram at point A in the middle;

[0028] Figure 7 This utility model Figure 4 A schematic diagram at point B in the middle.

[0029] Explanation of key figure labels:

[0030] 1-Dust removal component, 11-Dust removal device housing, 12-First filter screen, 13-Second filter screen, 14-First sliding groove, 15-First mounting plate, 16-First flow equalization shell, 17-First flow equalization hole, 18-Inlet pipe, 19-First conveying pipe, 2-Membrane separation component, 21-Membrane separation device housing, 22-Separation membrane body, 23-Inlet, 24-Condensation device, 25-Condensation plate, 26-First outlet, 27-Second conveying pipe, 28-Drain outlet, 29-Second outlet, 210-Third conveying pipe, 3-Absorption component, 31-Absorption device housing, 32-Activated carbon layer, 33-Second sliding groove, 34-Second mounting plate, 35-Second flow equalization shell, 36-Second flow equalization hole, 37-Exhaust pipe. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] like Figures 1-5 As shown, an extruder exhaust gas treatment device according to one embodiment of the present invention includes a dust removal component 1, a membrane separation component 2, and an absorption component 3.

[0033] like Figures 1-6As shown, the dust removal assembly 1 includes a dust removal device housing 11, which is used to filter particulate matter such as dust in the exhaust gas. A first filter screen 12 and a second filter screen 13 are sequentially installed inside the dust removal device housing 11. The first filter screen 12 and the second filter screen 13 sequentially intercept and filter particulate matter in the exhaust gas entering the dust removal device housing 11, ensuring that the particulate matter in the exhaust gas is completely filtered out. The pore size of the filter holes on the first filter screen 12 is larger than that on the second filter screen 13. The first filter screen 12 is located near the air inlet of the dust removal device housing 11, so that the exhaust gas entering the dust removal device housing 11 first undergoes preliminary filtration through the larger pore size of the first filter screen 12, and then undergoes thorough filtration through the smaller pore size of the second filter screen 13, ensuring that the particulate matter in the exhaust gas is completely filtered out.

[0034] like Figure 5 and Figure 6 As shown, two pairs of first sliding grooves 14 are provided on the inner sidewalls of the upper and lower end panels of the dust collector housing 11. The two ends of the first filter screen 12 and the second filter screen 13 are slidably connected to the two pairs of first sliding grooves 14, respectively. The first sliding grooves 14 allow the first filter screen 12 and the second filter screen 13 to be slidably installed inside the dust collector housing 11, making it convenient to clean the first filter screen 12 and the second filter screen 13. At the same time, the first filter screen 12 and the second filter screen 13 are installed between the upper and lower end panels of the dust collector housing 11, so that residual particles inside the dust collector housing 11 can be cleaned through the installation points of the first filter screen 12 and the second filter screen 13. A first mounting plate 15 is installed on the outer end of the first filter screen 12 and the second filter screen 13, which facilitates the removal of the first filter screen 12 and the second filter screen 13 from the dust collector housing 11 for cleaning.

[0035] like Figure 3 and Figure 6 As shown, a first flow equalization shell 16 is fixedly connected to the inner side wall of the air inlet of the dust removal device housing 11. The first flow equalization shell 16 has multiple first flow equalization holes 17 on the side wall away from the air inlet of the dust removal device housing 11, so that the exhaust gas entering the dust removal device housing 11 is diverted through the first flow equalization holes 17 and then filtered through the first filter screen 12 and the second filter screen 13, thereby increasing the filtration area of ​​the first filter screen 12 and the second filter screen 13 for exhaust gas, thereby improving the treatment efficiency of exhaust gas.

[0036] like Figure 3 and Figure 6 As shown, multiple first flow equalization holes 17 are uniformly arranged in a ring shape, and the first flow equalization holes 17 are inclined in a way that diffuses outward, so that the exhaust gas can diffuse through the first flow equalization holes 17, thereby increasing the area of ​​exhaust gas distribution in the dust removal device housing 11, and thus increasing the contact area between the exhaust gas and the first filter screen 12 and the second filter screen 13.

[0037] like Figures 1-3 As shown, an air inlet pipe 18 is fixedly connected to the outer wall of the air inlet of the dust collector housing 11. The exhaust gas generated by the extruder is transported to the dust collector housing 11 for treatment through the air inlet pipe 18. A first conveying pipe 19 is fixedly connected to the outer wall of the air outlet of the dust collector housing 11. The treated exhaust gas inside the dust collector housing 11 is discharged through the first conveying pipe 19.

[0038] like Figures 1-5 As shown, the membrane separation assembly 2 includes a membrane separation device housing 21 and a condenser 24. The membrane separation device housing 21 is connected to the dust removal device housing 11, allowing the dust removal device housing 11 to filter dust and other particulate matter from the exhaust gas and then transport it into the membrane separation device housing 21. This minimizes the amount of particulate matter in the exhaust gas entering the membrane separation device housing 21, thus avoiding the impact of particulate matter on the propylene separation of the membrane separation assembly 2. A separation membrane body 22 is installed inside the membrane separation device housing 21. When the exhaust gas enters the membrane separation device housing 21, the separation of propylene in the exhaust gas is achieved through the separation membrane body 22. The membrane separation device housing 21 is connected to the condenser 24, allowing the propylene gas separated by the separation membrane body 22 inside the membrane separation device housing 21 to enter the condenser 24. The condenser 24 is equipped with multiple condenser plates 25, through which the propylene gas entering the condenser 24 is condensed and recovered. Multiple condenser plates 25 are arranged in an alternating manner within the condenser device 24, so that the propylene gas entering the condenser device 24 can fully contact the condenser plates 25, thereby improving the condensation effect of the condenser plates 25 on propylene.

[0039] like Figure 3 and Figure 4 As shown, an air inlet 23 is provided at the bottom of the membrane separation device housing 21. The end of the first conveying pipe 19 away from the dust removal device housing 11 is fixedly connected to the air inlet 23, so that the exhaust gas discharged from the dust removal device housing 11 is conveyed to the membrane separation device housing 21 for treatment through the first conveying pipe 19.

[0040] like Figure 3 and Figure 4 As shown, a first air outlet 26 is provided on the upper side of the side wall of the membrane separator housing 21. A second conveying pipe 27 is fixedly connected to the outer side of the first air outlet 26. The end of the second conveying pipe 27 away from the membrane separator housing 21 is fixedly connected to the air inlet of the condenser 24. When the waste gas enters the membrane separator housing 21 and is separated by the separation membrane body 22, the separated propylene gas can be conveyed to the condenser 24 through the second conveying pipe 27 for condensation. A drain port 28 is provided at the bottom of the condenser 24. After the propylene is condensed by the condensing plate 25 in the condenser 24, it is discharged through the drain port 28.

[0041] like Figures 1-5 As shown, a second air outlet 29 is provided on the top wall of the membrane separation device housing 21, and a third conveying pipe 210 is fixedly connected to the second air outlet 29. The waste gas after propylene separation is discharged through the second air outlet 29 inside the membrane separation device housing 21.

[0042] like Figures 1-5 as well as Figure 7 As shown, the absorption assembly 3 includes an absorption device housing 31, within which an activated carbon layer 32 is installed. A pair of second sliding grooves 33 are formed on the inner sidewalls of the front and rear end plates of the absorption device housing 31. The two ends of the activated carbon layer 32 are slidably connected to the pair of second sliding grooves 33. The absorption device housing 31 is connected to the membrane separation device housing 21. This allows the waste gas to enter the absorption device housing 31 after propylene separation is completed within the membrane separation device housing 21. The activated carbon layer 32 within the absorption device housing 31 then treats other harmful components in the waste gas, utilizing the adsorption properties of the activated carbon to absorb these harmful components, ensuring that the emitted waste gas meets emission standards. Furthermore, the activated carbon layer 32 is slidably installed within the absorption device housing 31, facilitating its replacement.

[0043] like Figure 3 and Figure 5 As shown, the activated carbon layer 32 is fixedly connected to a second mounting plate 34 at one end outside the housing 31 of the absorption device. The second mounting plate 34 makes it easy to install and remove the activated carbon layer 32.

[0044] like Figures 1-4 As shown, the end of the third conveying pipe 210 away from the second outlet 29 is fixedly connected to the outer wall of the air inlet of the absorption device housing 31, so that the waste gas discharged through the second outlet 29 is conveyed to the absorption device housing 31 for treatment through the third conveying pipe 210. An exhaust pipe 37 is fixedly connected to the outer wall of the air outlet of the absorption device housing 31, and the waste gas treated in the absorption device housing 31 is discharged through the exhaust pipe 37.

[0045] like Figure 3 and Figure 5 As shown, a second flow equalization shell 35 is fixedly connected to the inner wall of the air inlet of the absorption device housing 31. Multiple second flow equalization holes 36 are formed on the side wall of the second flow equalization shell 35 away from the air inlet of the absorption device housing 31. These holes are evenly arranged in a ring shape and are inclined outwards. The waste gas entering the absorption device housing 31 is diffused and divided through the second flow equalization holes 36, resulting in a uniform distribution of the waste gas within the absorption device housing 31. This increases the contact area between the waste gas and the activated carbon layer 32, thereby improving the absorption effect of the activated carbon layer 32 on harmful components in the waste gas.

[0046] In operation, after the extruder discharges the waste gas generated during plastic processing, it is transported to the dust removal device housing 11 through the air inlet pipe 18. The waste gas entering the dust removal device housing 11 is diffused and divided through the first flow equalization hole 17, and then passes through the first filter screen 12 and the second filter screen 13 in sequence. The first filter screen 12 and the second filter screen 13 filter the dust and other particulate matter in the waste gas. The waste gas after dust filtration is transported to the membrane separation device housing 21 through the first conveying pipe 19. In the membrane separation device housing 21, the propylene in the waste gas is separated by the separation membrane body 22. The separated propylene gas is transported to the condensation device 24 through the second conveying pipe 27, and then the propylene gas is condensed by multiple condensing plates 25. The condensed propylene is discharged through the drain port 28. At the same time, the waste gas after propylene separation is transported to the absorption device housing 31 through the third conveying pipe 210. The activated carbon in the activated carbon layer 32 absorbs the harmful components in the waste gas. The waste gas with the harmful gases removed can be discharged through the exhaust pipe 37.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for treating exhaust gas from an extruder, characterized in that, include: A dust removal assembly includes a dust removal device housing. A first filter screen and a second filter screen are sequentially installed inside the dust removal device housing. The aperture of the filter screen on the first filter screen is larger than the aperture of the filter screen on the second filter screen. The first filter screen is located on the side near the air inlet of the dust removal device housing. A membrane separation assembly includes a membrane separation device housing and a condensation device. The membrane separation device housing is connected to a dust removal device housing. A separation membrane body is disposed inside the membrane separation device housing. The membrane separation device housing is connected to the condensation device. Multiple condensation plates are disposed inside the condensation device in an alternating manner. An absorption assembly includes an absorption device housing, an activated carbon layer installed inside the absorption device housing, and a pair of second sliding grooves formed on the inner sidewalls of the front and rear end plates of the absorption device housing. The two ends of the activated carbon layer are respectively slidably connected to the pair of second sliding grooves. The absorption device housing is connected to the membrane separation device housing.

2. The extruder exhaust gas treatment device according to claim 1, characterized in that, The dust removal device housing has two pairs of first sliding grooves on the inner sidewalls of the upper and lower end panels. The two ends of the first filter screen and the second filter screen are respectively slidably connected in the two pairs of first sliding grooves. The first filter screen and the second filter screen are each mounted with a first mounting plate at the end of the first filter screen and the second filter screen located on the outside of the dust removal device housing.

3. The extruder exhaust gas treatment device according to claim 1, characterized in that, A first flow equalization shell is fixedly connected to the inner side wall of the air inlet of the dust removal device housing. The first flow equalization shell has multiple first flow equalization holes on the side wall away from the air inlet of the dust removal device housing.

4. The extruder exhaust gas treatment device according to claim 3, characterized in that, The first flow equalization holes are evenly arranged in a ring, and the first flow equalization holes are inclined in a way that diffuses outward.

5. The extruder exhaust gas treatment device according to claim 1, characterized in that, An air inlet pipe is fixedly connected to the outer wall of the air inlet of the dust removal device housing, and a first conveying pipe is fixedly connected to the outer wall of the air outlet of the dust removal device housing.

6. The extruder exhaust gas treatment device according to claim 5, characterized in that, An air inlet is provided at the bottom of the membrane separation device housing, and the end of the first conveying pipe away from the dust removal device housing is fixedly connected to the air inlet.

7. The extruder exhaust gas treatment device according to claim 1, characterized in that, The membrane separation device has a first air outlet on the upper side of the side wall of the housing. A second conveying pipe is fixedly connected to the outer side of the first air outlet. The end of the second conveying pipe away from the housing of the membrane separation device is fixedly connected to the air inlet of the condensing device. The bottom of the condensing device is provided with a drain outlet.

8. The extruder exhaust gas treatment device according to claim 1, characterized in that, A second air outlet is provided on the top wall panel of the membrane separation device housing, and a third conveying pipe is fixedly connected to the second air outlet.

9. The extruder exhaust gas treatment device according to claim 8, characterized in that, The end of the third delivery pipe away from the second air outlet is fixedly connected to the outer wall of the air inlet of the absorption device housing, and an exhaust pipe is fixedly connected to the outer wall of the air outlet of the absorption device housing.

10. The extruder exhaust gas treatment device according to claim 9, characterized in that, A second flow equalization shell is fixedly connected to the inner side wall of the air inlet of the absorption device housing. The second flow equalization shell has multiple second flow equalization holes on the side wall away from the air inlet of the absorption device housing. The multiple second flow equalization holes are evenly arranged in a ring and are inclined in a way that diffuses outward.

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