Purification device

Abstract

The utility model discloses a purification device, and relates to the technical field of biogas purification, the purification device comprises a main body, a cover body and a filler piece, the main body is provided with a gas inlet cavity; the cover body is mounted at the top of the main body; the packing piece comprises a packing plate and a plurality of air passing pipes installed on the packing plate at intervals, an air outlet cavity is defined by the cover body and the packing plate, and the packing plate is provided with a material groove used for being filled with purification liquid; each air passing pipe comprises an air inlet, an air outlet and a bent section, two ends of the bent section are respectively communicated with the air inlet and the air outlet, the air inlet is communicated with the air inlet cavity, the air outlet is arranged below the liquid level of the purification liquid, and the bent section is arranged above the liquid level of the purification liquid. Through the arrangement, the biogas in the gas inlet cavity can uniformly enter the purification liquid through the plurality of gas passing pipes, so that the distribution of the biogas in the purification liquid is more dispersed, the biogas and the purification liquid can be fully subjected to contact reaction, the purification liquid is more fully used, and finally, a better purification effect on the biogas is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to biogas purification technical field, especially purifying device. BACKGROUND

[0002] Biogas will be doped with carbon dioxide and other impurities after being generated by a biogas tank, and directly using the biogas for biogas power generation is extremely harmful to the generator set, so a series of purification processes, including pretreatment, desulfurization, deamination, dehydration, purification and other processes, are needed before the biogas is delivered to the generator set. In the biogas purification process, purification equipment needs to be used to provide a reaction space for the purification of biogas, and purification materials need to be filled in the purification equipment to neutralize or filter the impurities in the biogas. However, the use of purification materials in the current purification equipment is usually insufficient, which leads to the impurities in the biogas being unable to be fully removed, thereby causing the purification effect of the biogas purification process to be difficult to achieve the expected effect.

[0003] Therefore, it is necessary to provide a purifying device to solve or at least alleviate the above technical problems. SUMMARY

[0004] The main purpose of the utility model is to provide a purifying device, which aims to solve the technical problem that the purification effect of the biogas purification process is difficult to meet the expectation.

[0005] To achieve the above-mentioned purpose, the utility model provides a purifying device, which comprises:

[0006] A main body is provided with an air inlet cavity;

[0007] A cover body is installed on the top of the main body;

[0008] A filler piece comprises a filler plate and a plurality of air pipes installed at intervals on the filler plate, the cover body and the filler plate form an air outlet cavity, and the filler plate is provided with a material groove for loading purification liquid;

[0009] Each air pipe comprises an air inlet, an air outlet and a bending section, the two ends of the bending section are respectively communicated with the air inlet and the air outlet, the air inlet is communicated with the air inlet cavity, the air outlet is arranged below the liquid level of the purification liquid, and the bending section is arranged above the liquid level of the purification liquid.

[0010] In an embodiment, the main body comprises a shell and a bearing plate, the bearing plate is installed on the top of the shell, the bearing plate and the shell form the air inlet cavity, the filler plate is arranged on the top of the bearing plate, the bearing plate is provided with a ventilation hole, and the ventilation hole is respectively communicated with the air inlet cavity and the air inlet.

[0011] In an embodiment, the cover is provided with an opening, and the filler plate is slidably arranged on the top of the bearing plate through the opening, and the side of the filler plate away from the opening is in abutment with the inner side of the cover.

[0012] In an embodiment, the side of the filler plate away from the bearing plate is provided with a guide groove, and the guide groove is arranged to extend from the side of the filler plate close to the opening to the side away from the opening;

[0013] The purification device further comprises a lock rod, which is mounted on the cover and cooperates with the guide groove to define the sliding path of the filler plate.

[0014] In an embodiment, the filler plate is further provided with a limiting groove, which is arranged in communication with the end of the guide groove close to the opening;

[0015] Definition: the direction perpendicular to the extension direction of the guide groove is the first direction;

[0016] The side wall of the guide groove is recessed to form the limiting groove in the first direction;

[0017] The lock rod is rotatably mounted on the cover, and the end of the lock rod located in the guide groove is provided with a flange, which cooperates with the limiting groove to prevent the filler plate from sliding.

[0018] In an embodiment, the number of the guide grooves, the limiting grooves and the lock rods is two, and each of the limiting grooves is arranged at the end of each of the guide grooves close to the opening, and each of the guide grooves is correspondingly provided with one of the lock rods.

[0019] In an embodiment, the lock rod is installed through the cover, and the end of the lock rod away from the guide groove is provided with a handle.

[0020] In an embodiment, the purification device further comprises a sealing layer, which is arranged at the opening, and the top of the sealing layer is mounted on the cover, and the bottom of the sealing layer is arranged in abutment with the filler plate.

[0021] In an embodiment, the purification device further comprises an air inlet interface and an air outlet interface, the air inlet interface is sealingly connected with the main body, and the air inlet interface is in communication with the air inlet cavity;

[0022] The air outlet interface is sealingly connected with the cover, and the air outlet interface is in communication with the air outlet cavity.

[0023] In an embodiment, the purification device further comprises a liquid discharge valve, which is mounted on the bottom of the main body and is in communication with the air inlet cavity. In an embodiment, the purification device further comprises a liquid discharge valve, which is mounted on the bottom of the main body and is in communication with the air inlet cavity.

[0024] In the technical scheme provided by the utility model, the purification device comprises a main body, a cover body and a filler, wherein the main body is provided with an air inlet cavity; the cover body is installed on the top of the main body; the filler comprises a filler plate and a plurality of air passing pipes which are installed at intervals on the filler plate, the cover body and the filler plate enclose an air outlet cavity, the filler plate is provided with a material groove for loading purification liquid; each air passing pipe comprises an air inlet, an air outlet and a bending section, the two ends of the bending section are communicated with the air inlet and the air outlet respectively, the air inlet is communicated with the air inlet cavity, the air outlet is arranged below the liquid level of the purification liquid, and the bending section is arranged above the liquid level of the purification liquid. Through the arrangement, the biogas in the air inlet cavity can uniformly enter the purification liquid through the plurality of air passing pipes, the distribution of the biogas in the purification liquid is more dispersed, so that the biogas and the purification liquid can fully react, and the use of the purification liquid is more sufficient, and finally the biogas is better purified. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0026] Figure 1 It is a cross-sectional structure schematic view of the embodiment of the purification device provided by the utility model;

[0027] Figure 2 It is a structure schematic view of the filler plate in the embodiment of the purification device provided by the utility model;

[0028] Figure 3 It is a structure schematic view of the air passing pipe in the embodiment of the purification device provided by the utility model.

[0029] EXPLANATION OF DRAWINGS:

[0030] 100, purification device;

[0031] 1, main body;11, air inlet cavity;12, shell;13, bearing plate;131, air hole;

[0032] 2, cover body;21, air outlet cavity;22, opening;

[0033] 3, filler;31, filler plate;311, material groove;312, guide groove;313, limiting groove;32, air passing pipe;321, air inlet;322, air outlet;323, bending section;

[0034] 4, lock rod;41, handle;

[0035] 5, sealing layer;

[0036] 6, gas inlet interface;

[0037] 7, gas outlet interface;

[0038] 200, purification liquid;

[0039] X, extension direction; Y, first direction.

[0040] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0042] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0043] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one feature. In addition, if "and / or" or "and / or" appears in the whole text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0044] Biogas is a kind of convenient, clean and high-quality energy, which is produced by microbial fermentation of organic matter such as straw, manure, sewage and the like under certain moisture, temperature and anaerobic conditions. Biogas is paid attention to due to its characteristics of rich raw materials, simple technology, low cost and environmental friendliness. The popularization and application of biogas can not only alleviate the energy pressure, but also has important significance for increasing the income of farmers, breeders and the like, improving the living environment, protecting the forest and grass vegetation and maintaining the ecological balance.

[0045] After being produced in a biogas tank, biogas will contain impurities such as carbon dioxide, hydrogen sulfide and ammonia. The carbon dioxide will reduce the energy density of the biogas and slow down the combustion speed, and the hydrogen sulfide and ammonia will corrode the pipeline and cause environmental pollution after combustion. Therefore, after the biogas is output from the biogas tank, it needs to be purified and filtered in time to remove harmful impurities and increase the density of methane. The purified biogas can reach the standard and be convenient for being integrated into a natural gas pipeline or used as fuel for a generator set.

[0046] In the biogas purification process, a purification treatment device is needed as a purification reaction space of the biogas. The biogas is input into the purification treatment device and reacts with purification materials to achieve the purpose of purifying the biogas. However, the applicant finds through research that in the reaction process, the biogas does not fully contact with the purification materials, and it is difficult to make the biogas fully react with the purification materials, so that the impurities in the biogas cannot be fully removed, thereby causing the purification effect of the biogas purification process to be difficult to achieve the expected effect.

[0047] In view of this, the utility model provides a kind of purification device to solve the above technical problems.

[0048] Please refer to Figures 1 to 3 In an embodiment of the utility model, the purification device 100 includes a main body 1, a cover body 2 and a filler piece 3, wherein the main body 1 is provided with an air inlet cavity 11; the cover body 2 is installed on the top of the main body 1; the filler piece 3 includes a filler plate 31 and a plurality of air pipes 32 installed at intervals on the filler plate 31, the cover body 2 and the filler plate 31 form an air outlet cavity 21, and the filler plate 31 is provided with a trough 311 for loading purification liquid 200; each air pipe 32 includes an air inlet 321, an air outlet 322 and a bent section 323, the two ends of the bent section 323 are communicated with the air inlet 321 and the air outlet 322 respectively, the air inlet 321 is communicated with the air inlet cavity 11, the air outlet 322 is arranged below the liquid level of the purification liquid 200, and the bent section 323 is arranged above the liquid level of the purification liquid 200.

[0049] Specifically, the biogas is input from outside to the gas inlet cavity 11 in the main body 1, and then flows from the gas inlet cavity 11 to the gas outlet cavity 21, in the process, the biogas enters the purification liquid 200 through the gas passing pipe 32, and the plurality of gas passing pipes 32 enables the biogas to be more uniformly input into the purification liquid 200, thereby improving the purification effect and filtration efficiency. Compared with the technical solution of using a single large-diameter gas passing pipe 32, the use of the present technical solution can significantly disperse the flow resistance of the biogas in the purification liquid 200, reduce the pressure drop of the single gas passing pipe 32, thereby improving the system efficiency; in addition, in the present solution, a plurality of gas passing pipes 32 are provided, even if one of the gas passing pipes 32 is blocked by impurities, the remaining gas passing pipes 32 can still work normally, thereby improving the reliability of the purification device 100; on the other hand, the plurality of gas passing pipes 32 can more evenly distribute the biogas input to the position of the purification liquid 200, thereby fully agitating the purification liquid 200, enabling the biogas to fully contact with the purification liquid 200, thereby improving the purification effect. It should be noted that a plurality of holes are formed in the filler plate 31, the gas inlet port 321 of the gas passing pipe 32 is sealingly connected with the holes, and each gas inlet port 321 corresponds to a hole, so that the gas inlet port 321 can communicate with the gas inlet cavity 11. The gas passing pipe 32 is a "inverted U-shaped" gas pipe as a whole, with different lengths of the pipe bodies on both sides, in order to avoid the flow of the purification liquid 200 into the gas inlet cavity 11, the bending section 323 of the gas passing pipe 32 needs to be arranged above the liquid level of the purification liquid 200, in this way, the biogas in the gas inlet cavity 11 can pass through the gas inlet port 321, the bending section 323, the gas outlet port 322 and the purification liquid 200 in sequence, and finally enter the gas outlet cavity 21 and be output to the external pipeline through the gas outlet cavity 21. It should be further noted that the cover body 2 is installed on the top of the main body 1, and the connection between the two includes one of welding, pin connection, bolt connection and flange connection.

[0050] In the technical solution provided in the present embodiment, the purification device 100 comprises a main body 1, a cover body 2 and a filler 3, wherein the main body 1 is provided with a gas inlet cavity 11; the cover body 2 is installed on the top of the main body 1; the filler 3 comprises a filler plate 31 and a plurality of gas passing pipes 32 which are installed at intervals on the filler plate 31, the cover body 2 and the filler plate 31 form a gas outlet cavity 21, and the filler plate 31 is provided with a material groove 311 for loading the purification liquid 200; each gas passing pipe 32 comprises a gas inlet port 321, a gas outlet port 322 and a bending section 323, the two ends of the bending section 323 are in communication with the gas inlet port 321 and the gas outlet port 322 respectively, the gas inlet port 321 is in communication with the gas inlet cavity 11, the gas outlet port 322 is arranged below the liquid level of the purification liquid 200, and the bending section 323 is arranged above the liquid level of the purification liquid 200. Through this arrangement, the biogas in the gas inlet cavity 11 can be uniformly input into the purification liquid 200 through the plurality of gas passing pipes 32, so that the distribution of the biogas in the purification liquid 200 is more dispersed, thereby enabling the biogas and the purification liquid 200 to fully contact and react, and enabling the purification liquid 200 to be used more fully, and finally achieving better purification effect of the biogas.

[0051] Furthermore, in one embodiment of this utility model, the main body 1 includes a shell 12 and a support plate 13. The support plate 13 is installed on the top of the shell 12, and the support plate 13 and the shell 12 enclose an air intake cavity 11. A filler plate 31 is disposed on the top of the support plate 13, and the support plate 13 has vent holes 131, which communicate with the air intake cavity 11 and the air inlet 321 respectively. Please refer to [link / reference]. Figure 1 The support plate 13 supports the cover 2 and the filling component 3. The support plate 13 covers the top of the outer shell 12 and has a vent hole 131. The vent hole 131 connects the air inlet chamber 11 to the air inlet 321 of the air passage pipe 32. The shape and area of ​​the opening 22 of the vent hole 131 can be adjusted as needed to avoid affecting the biogas flow rate. The support plate 13 is bolted to the outer shell 12 to facilitate removal of the support plate 13 when maintenance of the purification device 100 is required, providing sufficient working space for the maintenance process. In a preferred embodiment, the air inlets 322 of the air passage pipe 32 are all oriented towards the vent hole 131, allowing the biogas in the air inlet chamber 11 to enter the air passage pipe 32 more smoothly.

[0052] Furthermore, in one embodiment of this utility model, an opening 22 is provided on the side of the cover 2, and a packing plate 31 is slidably disposed on the top of the support plate 13 through the opening 22. The side of the packing plate 31 away from the opening 22 abuts against the inner side of the cover 2. Please refer to [link / reference]. Figure 1The packing plate 31 can slide on top of the support plate 13, and one side of the packing plate 31 is provided at the opening 22, while the other side abuts against the inner side of the cover 2. This arrangement allows the support plate 13 to completely cover the vent hole 131, improving the sealing of the air inlet chamber 11 and preventing biogas in the air inlet chamber 11 from directly entering the air outlet chamber 21 without passing through the air pipe 32 and the purification liquid 200, thus affecting the quality of biogas leading to the external air pipe. In this embodiment, the bottom of the packing plate 31 is provided with a sliding groove, and correspondingly, the top of the support plate 13 is provided with a guide rail. The sliding groove and the guide rail are configured to cooperate, allowing the packing plate 31 to slide on the support plate 13 according to a predetermined trajectory. This design allows operators to more easily replace the purification fluid 200. When replacement is needed, simply pull the packing plate 31 out of the cover 2, pour out the old purification fluid 200, and then add the new purification fluid 200. After adding the new purification fluid 200, push the packing plate 31 back into the cover 2 to continue the biogas purification process. Furthermore, in this embodiment, the feed trough 311 is engraved with graduation lines to indicate the required level of purification fluid 200. These graduation lines provide a reference for operators when replacing the purification fluid 200, ensuring that the fluid is added in precise quantities. It should be noted that in this embodiment, to facilitate pushing and pulling the packing plate 31, a handle is also installed on the side wall of the packing plate 31 located on the side of the opening 22.

[0053] Furthermore, in one embodiment of this utility model, a guide groove 312 is provided on the side of the packing plate 31 away from the supporting plate 13. The guide groove 312 extends along the side of the packing plate 31 near the opening 22 and points away from the opening 22. The purification device 100 also includes a locking rod 4, which is installed on the cover 2 and cooperates with the guide groove 312 to limit the sliding path of the packing plate 31. Please refer to [link to relevant documentation]. Figure 1 and Figure 2 The extension direction X of guide groove 312 is parallel to... Figure 1 The length directions in the cross-sectional structural diagram are the same, so that the guide groove 312 can cooperate with the locking rod 4, allowing the packing plate 31 to slide smoothly out of the cover 2. This design ensures that the packing plate 31 can only slide along the extension direction X of the guide groove 312, preventing the packing plate 31 from tilting and affecting its sealing effect on the air inlet chamber 11. At the same time, the end of the guide groove 312 away from the opening 22 is through-hole, so that the packing plate 31 can be pulled out directly, making it convenient for the operator to replace the purification fluid 200.

[0054] In one embodiment of this utility model, the packing plate 31 is further provided with a limiting groove 313, which is connected to one end of the guide groove 312 near the opening 22; defined as: the direction perpendicular to the extension direction X of the guide groove 312 is the first direction Y; the side wall of the guide groove 312 is recessed along the first direction Y to form the limiting groove 313; the length of the limiting groove 313 is greater than the length of the guide groove 312; the locking rod 4 is rotatably mounted on the cover 2, and the end of the locking rod 4 located in the guide groove 312 is provided with a flange, which is configured to cooperate with the limiting groove 313 to prevent the packing plate 31 from sliding. Please refer to the following for details. Figure 1 and Figure 2 The limiting groove 313 is located near the opening 22, and correspondingly, the locking rod 4 is located on the cover 2 near the opening 22. The limiting groove 313 and the guide groove 312 are interconnected. The length of the limiting groove 313 in the first direction Y is greater than the length of the guide groove 312 in the first direction Y, so that the limiting groove 313 and the guide groove 312 form a "+" structure on the horizontal projection plane. At the same time, the end of the locking rod 4 located in the guide groove 312 is provided with a flange, and the locking rod 4 can rotate relative to the cover 2. This configuration allows the locking rod 4 to have both a locking state and a guiding state. In the locking state, the flange of the locking rod 4 rotates to a position parallel to the first direction Y. At this time, the flange cooperates with the inner wall surface of the limiting groove 313, so that the packing plate 31 cannot slide. In the guiding state, the flange of the locking rod 4 rotates to a position parallel to the extension direction X of the guide groove 312. At this time, the locking rod 4 cooperates with the guide groove 312 to limit the movement path of the packing plate 31.

[0055] In one embodiment of this utility model, there are two guide grooves 312, two limiting grooves 313, and two locking rods 4. Each guide groove 312 has a limiting groove 313 at one end near the opening 22, and each guide groove 312 has a corresponding locking rod 4. Please refer to Figure 2 The packing plate 31 has a rectangular projection on the horizontal plane. Along its central axis of symmetry, there are two guide grooves 312 and two limiting grooves 313. Two locking rods 4 are correspondingly provided in the guide grooves 312. This arrangement ensures more balanced force distribution on both sides of the packing plate 31, preventing stress concentration due to uneven force distribution during pushing and pulling. Simultaneously, when the locking rods 4 are in the locked state, both sides of the packing plate 31 are locked, preventing tilting of the packing plate 31 due to external force and ensuring the airtightness of the intake chamber 11.

[0056] Furthermore, in one embodiment of this utility model, the locking rod 4 is installed through the cover 2, and a handle 41 is installed at the end of the locking rod 4 away from the guide groove 312. Please refer to [link / reference]. Figure 1This design, where the locking rod 4 is installed through the cover 2, ensures that the locking rod 4 can be securely installed inside the cover 2. A handle 41 is installed at the end of the locking rod 4 furthest from the guide groove 312, allowing the operator to easily hold and operate the locking rod 4, thereby achieving the effect of quickly switching between the locking and guiding states. This design not only improves the ease of operation but also enhances the structural stability of the locking rod 4.

[0057] In one embodiment of this utility model, the purification device 100 further includes a sealing layer 5, which is disposed at the opening 22. The top of the sealing layer 5 is installed on the cover 2, and the bottom of the sealing layer 5 is fitted against the packing plate 31. Please refer to [link / reference]. Figure 1 The top of the sealing layer 5 is installed on the cover 2 and fits tightly against the cover 2. During the purification process, the bottom of the sealing layer 5 fits tightly against the part of the filler plate 31 located at the opening 22. This setting can effectively prevent external impurities from entering the purification device 100, ensuring that the internal purification process is not contaminated. At the same time, it ensures the airtightness and efficiency of the purification process, prevents biogas leakage and accidents, and improves the overall purification effect and safety of use.

[0058] Please see Figure 1 In one embodiment of this utility model, the purification device 100 further includes an air inlet 6 and an air outlet 7. The air inlet 6 is sealed to the main body 1 and communicates with the air inlet chamber 11; the air outlet 7 is sealed to the cover 2 and communicates with the air outlet chamber 21. The air inlet 6 can communicate with an external air inlet pipe, and the air outlet 7 can communicate with an external air outlet pipe. The air inlet 6 and the air outlet 7 are standardized interfaces. Both the air inlet 6 and the air outlet 7 include flanges. The air inlet 6 is connected to the external air inlet pipe through the flanges, and the air outlet 7 is connected to the external air outlet pipe through the flanges. This arrangement makes it more convenient to replace the external air inlet and air outlet pipes. During the replacement process, it is not necessary to remove the air inlet 6 and the air outlet 7, making the replacement process convenient and quick, and reducing the replacement time of the air inlet and air outlet pipes. With this setup, the biogas travels along the following path: intake pipe, intake port 6, intake chamber 11, vent 131, gas passage pipe 32, purified liquid 200, gas outlet chamber 21, gas outlet port 7, and gas outlet pipe.

[0059] In one embodiment of this utility model, the purification device 100 further includes a drain valve, which is installed at the bottom of the main body 1 and communicates with the air inlet chamber 11. The drain valve's location at the bottom of the main body 1 facilitates the collection and removal of condensate from the biogas, preventing moisture accumulation within the main body 1 and reducing the risk of corrosion and blockage. Simultaneously, by periodically removing condensate, the moisture content in the biogas delivery system can be reduced, thereby improving the stability and reliability of the entire biogas system. The drain valve also prevents condensate or other liquids from flowing back to the air inlet 6, avoiding any impact on the biogas filtration effect and subsequent use.

[0060] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A purification device, characterized in that, include: The main body is provided with an air intake chamber; A cover body, which is mounted on top of the main body; The packing component includes a packing plate and a plurality of air passage pipes spaced apart from the packing plate. The cover and the packing plate enclose an air outlet cavity. The packing plate is provided with a material tank for filling with purification liquid. Each of the aforementioned air passages includes an air inlet, an air outlet, and a bend section. The two ends of the bend section are respectively connected to the air inlet and the air outlet. The air inlet is connected to the air inlet chamber. The air outlet is located below the surface of the purified liquid, and the bend section is located above the surface of the purified liquid.

2. The purification device as described in claim 1, characterized in that, The main body includes an outer shell and a support plate. The support plate is installed on the top of the outer shell, and the support plate and the outer shell enclose the air intake cavity. The filler plate is disposed on the top of the support plate. The support plate has vent holes, which are respectively connected to the air intake cavity and the air inlet.

3. The purification device as described in claim 2, characterized in that, An opening is provided on the side of the cover, and the filler plate is slidably disposed on the top of the support plate through the opening. The side of the filler plate away from the opening abuts against the inner side of the cover.

4. The purification device as described in claim 3, characterized in that, A guide groove is provided on the side of the packing plate away from the bearing plate, and the guide groove extends along the side of the packing plate near the opening and toward the side away from the opening. The purification device also includes a locking rod, which is installed on the cover and is configured to cooperate with the guide groove to limit the sliding path of the packing plate.

5. The purification device as described in claim 4, characterized in that, The packing plate is also provided with a limiting groove, which is connected to the end of the guide groove near the opening; Definition: The direction perpendicular to the extension direction of the guide groove is the first direction; The sidewall of the guide groove is recessed along the first direction to form the limiting groove; The locking rod is rotatably mounted on the cover. The end of the locking rod located in the guide groove is provided with a flange. The flange is configured to cooperate with the limiting groove to prevent the packing plate from sliding.

6. The purification device as described in claim 5, characterized in that, The number of guide grooves, limiting grooves and locking rods are all two. Each guide groove is provided with a limiting groove at the end near the opening, and each guide groove is provided with a corresponding locking rod.

7. The purification device as described in claim 5, characterized in that, The locking rod is installed through the cover, and a handle is installed at the end of the locking rod away from the guide groove.

8. The purification device as described in claim 3, characterized in that, The purification device further includes a sealing layer, which is disposed at the opening, with the top of the sealing layer installed on the cover and the bottom of the sealing layer fitted to the filler plate.

9. The purification device according to any one of claims 1 to 8, characterized in that, The purification device further includes an air inlet and an air outlet. The air inlet is sealed to the main body and communicates with the air inlet chamber. The air outlet is sealed to the cover and communicates with the air outlet cavity.

10. The purification device according to any one of claims 1 to 8, characterized in that, The purification device also includes a drain valve, which is installed at the bottom of the main body and communicates with the air inlet chamber.

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