Odor collecting device for hydrolysis acidification pool

Abstract

The utility model relates to the technical field of water treatment, and discloses an odor collecting device for a hydrolysis acidification pool, which comprises a sealing cover arranged on a moving path of a sludge return pipe and a collecting pipe arranged on the sludge return pipe, the collecting pipe comprises a collecting piece arranged on the sludge return pipe, a hose communicated with the collecting piece and an odor collecting device communicated with the hose, the device is composed of the sealing cover and the collecting pipe, the collecting pipe can accurately collect odor generated by the sludge return pipe in a short distance, the sealing cover seals the sludge return pipe so that the odor generated by the sludge return pipe cannot diffuse to the periphery, the odor content in the reverse hanging film is remarkably reduced, and the influence of the odor in the reverse hanging film on maintainers is remarkably reduced; the sealing cover is arranged on the moving path of the sludge return pipe, and the skylight, the sliding piece and the sealing material are arranged on the sealing cover, so that the sealing cover can seal and accurately collect odor generated by the movable sludge return pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to an odor collection device for a hydrolysis acidification tank. Background Technique

[0002] After hydrolysis acidification treatment in the hydrolysis acidification tank of a sewage treatment plant, a large amount of sludge will be generated. After microbial fermentation of the sludge, substances with malodorous smells such as hydrogen sulfide, methanethiol, indole, and ammonia will be produced, seriously affecting the environmental quality, and will also cause discomfort to the human senses. In severe cases, symptoms such as nausea, vomiting, and dizziness will occur. Therefore, in the prior art, in order to solve the above problems, an anti-suspension membrane is usually used to seal the hydrolysis acidification tank, such as an anti-suspension membrane sewage treatment tank disclosed in the publication number CN111777112A.

[0003] When the present application actually operates on the hydrolysis acidification tank, it is found that although raising the anti-suspension membrane can seal the hydrolysis acidification tank to prevent the odor generated by the hydrolysis acidification tank from diffusing into the surrounding environment, when the staff enters the anti-suspension membrane for daily maintenance, the odor inside the anti-suspension membrane will still seriously affect the work efficiency of the staff. Therefore, it is necessary to treat the odor inside the anti-suspension membrane to facilitate the maintenance work of the hydrolysis acidification tank inside the anti-suspension membrane; the present application finds that the main source of the odor of the hydrolysis acidification tank is the sludge remaining in the sludge return pipe. Therefore, installing a collection device on the sludge return pipe can significantly reduce the odor content in the hydrolysis acidification tank. However, the sludge return pipe in the hydrolysis acidification tank is used in cooperation with a sludge scraper. Since the sludge scraper needs to move to scrape the sludge, the sludge return pipe also moves with the sludge scraper blade. Therefore, it is difficult for a conventional fixed odor collection device to cooperate with the moving sludge return pipe. Summary of the Utility Model

[0004] In order to overcome the problem that a conventional fixed odor collection device in the prior art cannot cooperate with a mobile sludge return pipe, the utility model provides an odor collection device for a hydrolysis acidification tank. The device is composed of a sealing cover and a collection pipe. The collection pipe can accurately collect the odor generated by the sludge return pipe at a close distance. The sealing cover seals the sludge return pipe so that the odor generated by the sludge return pipe will not diffuse into the surrounding area, significantly reducing the odor content in the anti-suspension membrane and significantly reducing the impact of the odor inside the anti-suspension membrane on the maintenance personnel. In the present application, by setting the sealing cover on the moving path of the sludge return pipe and setting a skylight, a sliding member and a sealing material on the sealing cover, the sealing cover can seal and accurately collect the odor generated by the mobile sludge return pipe.

[0005] The specific technical solution of the utility model is as follows:

[0006] An odor collection device for a hydrolysis acidification tank, comprising a sealing cover arranged on the moving path of a sludge return pipe and a collection pipe arranged on the sludge return pipe. The collection pipe includes a collection member arranged on the sludge return pipe, a hose communicated with the collection member, and a gas collection device communicated with the hose.

[0007] The utility model provides an odor collection device for a hydrolysis acidification tank. The device includes a sealing cover arranged on the moving path of a sludge return pipe and a collection pipe arranged on the sludge return pipe. The sealing cover of the device can seal the sludge return pipe so that the odor generated by the sludge return pipe will not diffuse to the surroundings, significantly reducing the odor content in the anti-hanging film, and significantly reducing the impact of the odor on the staff entering the anti-hanging film for maintenance. The collection pipe arranged on the sludge return pipe can accurately collect the odor generated by the sludge return pipe at a close distance, minimizing the outward diffusion of the odor to the greatest extent, so that the odor generated by the sludge return pipe will be collected by the collection pipe.

[0008] Preferably, the sealing cover includes a cover body and a window arranged on the cover body. A sliding member sleeved on the sludge return pipe and slidably connected to the window is arranged on the window. A sealing material with one end connected to the window is sleeved on the torsion roller. The sliding member is also provided with a torsion roller. The torsion roller includes a fixing member arranged on the sliding member, a rotating shaft rotatably connected to the fixing member, and a torsion spring sleeved on the rotating shaft and connecting the rotating shaft and the fixing member respectively. The sealing material is one or several of a polymer film and a foldable sheet material.

[0009] The sealing cover of the utility model can seal the mobile sludge return pipe. When in use, if the sealing cover moves along with the movement of the sludge return pipeline, the part of the sealing cover immersed in the hydrolysis acidification tank will cause a large disturbance to the liquid, affecting the hydrolysis acidification tank and at the same time affecting the sealing performance of the sealing cover. Therefore, the present invention fixes the sealing cover and sets a window and a sliding member slidably connected to the window on the sealing cover. The sliding member is sleeved on the sludge return pipe. Through the sliding member and the window, when the sludge return pipe moves, it can drive the sliding member to slide on the window. A torsion roller is arranged on the sliding member, and a sealing material with one end connected to the window is arranged on the torsion roller. When the sliding member slides, the sealing material on the torsion roller will be released and contracted. Through the torsion action of the rotating shaft, the sealing material can seal the part of the window not covered by the sliding member, ensuring that the sealing state of the sealing cover can be maintained when the sliding member slides on the sealing member, so that the odor will not be diffused outside the sealing cover when the sludge return pipe moves, ensuring the sealing performance of the sealing cover and at the same time reducing the impact of the sealing cover on the hydrolysis acidification tank.

[0010] Preferably, a first magnetic attraction member is arranged on the side of the sealing material, and a second magnetic attraction member matched with the first magnetic attraction member is arranged on the window.

[0011] Preferably, the collecting member includes an opening end and a recovery end. The opening is sleeved on the sludge return pipe, and the recovery end is communicated with a hose.

[0012] Preferably, a turntable is further provided on the gas collecting device, and the hose is arranged on the turntable.

[0013] Preferably, a window track is provided on the window, and the sliding member is slidably connected along the window track.

[0014] Preferably, the side of the window matches the side of the sliding member.

[0015] Preferably, the opening end of the cover body is immersed in the liquid of the hydrolysis acidification tank.

[0016] Preferably, a one-way valve is provided on the cover body.

[0017] Compared with the prior art, the present application has the following technical effects:

[0018] The device is composed of a sealing cover and a collecting pipe. The collecting pipe can accurately collect the odor generated by the sludge return pipe at a short distance. The sealing cover seals the sludge return pipe so that the odor generated by the sludge return pipe will not spread to the surroundings, significantly reducing the odor content in the anti-suspension membrane and significantly reducing the impact of the odor in the anti-suspension membrane on maintenance personnel. In the present application, by arranging the sealing cover on the moving path of the sludge return pipe and providing a skylight, a sliding member and a sealing material on the sealing cover, the sealing cover can seal and accurately collect the odor generated by the mobile sludge return pipe. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the present utility model.

[0020] Figure 2 It is a cross-sectional view of the sealing cover of the present utility model.

[0021] Figure 3 It is a schematic structural diagram of the sliding member of the present utility model.

[0022] Figure 4 It is a schematic structural diagram of the collecting pipe of the present utility model.

[0023] In the figure, sealing cover 1, cover body 101, window 102, window track 1021, sliding member 103, torsion roller 131, fixing member 1311, rotating shaft 1312, torsion spring 1313, sealing material 132, sludge return pipe 2, collecting pipe 3, collecting member 301, opening end 3011, recovery end 3012, hose 302 and gas collecting device 303. Detailed Embodiments

[0024] The present utility model will be further described below in conjunction with embodiments.

[0025] Example 1:

[0026] As Figure 1 and Figure 2 shown, an odor collection device for a hydrolysis and acidification tank includes a sealing cover 1 provided on the moving path of the sludge return pipe and a collection pipe 3 provided on the sludge return pipe 2. The sealing cover includes a cover body 101 and a window 102 provided at the top of the cover body. The cover body is a rectangular cover surface, and the bottom of the cover body is open. A part of the opening of the cover body is immersed in the liquid of the hydrolysis and acidification tank. The cover body is also provided with a one-way valve for gas to flow from outside the cover body to inside the cover body. The window is rectangular and matches the moving path of the sludge return pipe. The sludge return pipe can reciprocate in the window. A window track 1021 is provided on the window, and a sliding member 103 is provided on the track. The sliding member is sleeved on the sludge return pipe. Sealing materials 132 are provided at both ends of the sliding member not placed on the window track. The sealing material is a PVE film. One end of the sealing material is connected to the sliding member and the other end is connected to the side of the window. The sealing material and the sliding member cover the window to form a seal. A first magnetic attraction member is provided on the sealing material, and a second magnetic attraction member matching the first magnetic attraction member is provided on the window track. The first magnetic attraction member and the second magnetic attraction member are magnetically connected. A collection member 301 is sleeved on the collection pipe. A hose 302 is provided on the collection member. One end of the hose communicates with the collection member, and the other end communicates with a gas collection device 303;

[0027] As Figure 3 shown, the sliding member includes a main body, a sliding member, a through hole, and two torsion rollers 131 symmetrically provided at the bottom of the main body. The sliding member is a long strip-shaped slider. The sliding member is provided on the side of the sliding body and is slidably connected to the window track. The sludge return pipe passes through the through hole to sleeved the sliding member on the sludge return pipe. The through hole is located on the main body; the torsion roller includes two symmetrically arranged fixing members 1311, a rotating shaft 1312, and a torsion spring 1313. The rotating shaft is located between the two symmetrically arranged fixing members and is rotatably connected to the fixing members. Torsion springs are provided at both ends of the rotating shaft. One end of the torsion spring is connected to the fixing member and the other end is connected to the rotating shaft. A sealing material is sleeved on the rotating shaft;

[0028] As Figure 4 shown, the collection member includes an open end 3011 and a recovery end 3012. The open end is sleeved on the sludge return pipe. The inner wall of the open end is spaced 3 mm from the outer wall of the sludge return pipe. The bottom of the open end is 1 cm away from the opening of the sludge return pipe to prevent the sludge in the sludge return pipe from blocking the open end. The recovery end communicates with the open end and the hose. A hose interface is provided on the open end. The hose is threadedly connected to the hose interface.

[0029] Example 2:

[0030] As Figure 1 and Figure 2As shown in the figure, an odor collection device for a hydrolysis acidification tank includes a sealing cover 1 provided on the moving path of a sludge return pipe and a collection pipe 3 provided on the sludge return pipe 2. The sealing cover includes a cover body 101 and a window 102 provided at the top of the cover body. The cover body is a rectangular cover surface, and the bottom of the cover body is open. A part of the opening of the cover body is immersed in the liquid of the hydrolysis acidification tank. The cover body is also provided with a one-way valve for gas to flow from outside the cover body to inside the cover body. The window is rectangular and matches the moving path of the sludge return pipe. The sludge return pipe can reciprocate in the window. A window track 1021 is provided on the window, and a sliding member 103 is provided on the track. The sliding member is sleeved on the sludge return pipe. Sealing materials 132 are provided at both ends of the sliding member not placed on the window track. The sealing materials are foldable PVE thin plates. One end of the sealing material is connected to the sliding member and the other end is connected to the side of the window. The sealing material and the sliding member cover the window to form a seal. A first magnetic member is provided on the sealing material, and a second magnetic member matching the first magnetic member is provided on the window track. The first magnetic member and the second magnetic member are magnetically connected. A collection member 301 is sleeved on the collection pipe. A hose 302 is provided on the collection member. One end of the hose is connected to the collection member, and the other end is connected to a gas collection device 303;

[0031] As Figure 3 shown, the sliding member includes a main body, a sliding member, a through hole, and two torsion rollers 131 symmetrically provided at the bottom of the main body. The sliding member is a long strip-shaped slider, which is provided on the side of the sliding body and is slidably connected to the window track. The sludge return pipe passes through the through hole to sleeved the sliding member on the sludge return pipe. The through hole is located on the main body; the torsion roller includes two symmetrically arranged fixing members 1311, a rotating shaft 1312, and a torsion spring 1313. The rotating shaft is located between the two symmetrically arranged fixing members and is rotatably connected to the fixing members. Torsion springs are provided at both ends of the rotating shaft. One end of the torsion spring is connected to the fixing member and the other end is connected to the rotating shaft. The sealing material is sleeved on the rotating shaft;

[0032] As Figure 4 shown, the collection member includes an open end 3011 and a recovery end 3012. The open end is sleeved on the sludge return pipe. The inner wall of the open end is spaced 3 mm from the outer wall of the sludge return pipe. The bottom of the open end is 1 cm away from the opening of the sludge return pipe to prevent the sludge in the sludge return pipe from blocking the open end. The recovery end connects the open end and the hose. A hose interface is provided on the open end. The hose is threadedly connected to the hose interface.

[0033] Example 3:

[0034] As Figure 1 and Figure 2As shown in the figure, an odor collection device for a hydrolysis acidification tank includes a sealing cover 1 arranged on the moving path of a sludge return pipe and a collection pipe 3 arranged on the sludge return pipe 2. The sealing cover includes a cover body 101 and a window 102 provided at the top of the cover body. The cover body is a rectangular cover surface, and the bottom of the cover body is open. A part of the opening of the cover body is immersed in the liquid of the hydrolysis acidification tank. The cover body is also provided with a one-way valve for gas to flow from outside the cover body into the cover body. The window is rectangular and matches the moving path of the sludge return pipe. The sludge return pipe can reciprocate in the window. A window track 1021 is provided on the window, and a sliding member 103 is arranged on the track. The sliding member is sleeved on the sludge return pipe. Sealing materials 132 are provided at both ends of the sliding member not placed on the window track. The sealing materials are foldable PVDF films. One end of the sealing material is connected to the sliding member and the other end is connected to the side of the window. The sealing material and the sliding member cover the window to form a seal. A first magnetic member is provided on the sealing material, and a second magnetic member matching the first magnetic member is arranged on the window track. The first magnetic member and the second magnetic member are magnetically connected. A collection member 301 is sleeved on the collection pipe. A hose 302 is provided on the collection member. One end of the hose is communicated with the collection member, and the other end is communicated with a gas collection device 303;

[0035] As Figure 3 shown in the figure, the sliding member includes a main body, a sliding part, a through hole, and two torsion rollers 131 symmetrically arranged at the bottom of the main body. The sliding part is a long strip-shaped slider, which is arranged on the side of the sliding body and is slidably connected to the window track. A number of balls are arranged on the sliding part, and the balls are slidably connected to the window track. The sludge return pipe passes through the through hole to sleeved the sliding member on the sludge return pipe. The through hole is located on the main body; The torsion roller includes two symmetrically arranged fixing parts 1311, a rotating shaft 1312, and a torsion spring 1313. The rotating shaft is located between the two symmetrically arranged fixing parts and is rotatably connected to the fixing parts. Torsion springs are arranged at both ends of the rotating shaft. One end of the torsion spring is connected to the fixing part and the other end is connected to the rotating shaft. The sealing material is sleeved on the rotating shaft

[0036] As Figure 4 shown in the figure, the collection member includes an open end 3011 and a recovery end 3012. The open end is sleeved on the sludge return pipe. The inner wall of the open end is spaced 3 mm from the outer wall of the sludge return pipe. The bottom of the open end is 1 cm away from the opening of the sludge return pipe to prevent the sludge in the sludge return pipe from blocking the open end. The recovery end communicates the open end and the hose. A hose interface is provided on the open end, and the hose is threadedly connected to the hose interface.

[0037] Example 4:

[0038] As Figure 1 and Figure 2As shown in the figure, an odor collection device for a hydrolysis acidification tank includes a sealing cover 1 provided on the moving path of a sludge return pipe and a collection pipe 3 provided on the sludge return pipe 2. The sealing cover includes a cover body 101 and a window 102 provided at the top of the cover body. The cover body is a rectangular cover surface, and the bottom of the cover body is open. A part of the opening of the cover body is immersed in the liquid of the hydrolysis acidification tank. The cover body is also provided with a one-way valve for gas to flow from outside the cover body into the cover body. The window is rectangular and matches the moving path of the sludge return pipe. The sludge return pipe can reciprocate in the window. A window track 1021 is provided on the window, and a sliding member 103 is provided on the track. The sliding member is sleeved on the sludge return pipe. Sealing materials 132 are provided at both ends of the sliding member not placed on the window track. The sealing materials are foldable PVE thin plates. One end of the sealing material is connected to the sliding member and the other end is connected to the side of the window. The sealing material and the sliding member cover the window to form a seal. A first magnetic member is provided on the sealing material, and a second magnetic member matching the first magnetic member is provided on the window track. The first magnetic member and the second magnetic member are magnetically connected. A collection member 301 is sleeved on the collection pipe. A hose 302 is provided on the collection member. One end of the hose communicates with the collection member, and the other end communicates with a gas collection device 303;

[0039] As Figure 3 shown, the sliding member includes a main body, a sliding part, a through hole, and two torsion rollers 131 symmetrically provided at the bottom of the main body. The sliding part is a long strip-shaped slider, which is provided on the side of the sliding body and is slidably connected to the window track. A roller is provided on the sliding part, and the roller is slidably connected to the window track. The sludge return pipe passes through the through hole to sleeve the sliding member on the sludge return pipe, and the through hole is located on the main body; The torsion roller includes two symmetrically arranged fixing parts 1311, a rotating shaft 1312, and a torsion spring 1313. The rotating shaft is located between the two symmetrically arranged fixing parts and is rotatably connected to the fixing parts. Torsion springs are provided at both ends of the rotating shaft. One end of the torsion spring is connected to the fixing part and the other end is connected to the rotating shaft. A sealing material is sleeved on the rotating shaft;

[0040] As Figure 4 shown, the collection member includes an open end 3011 and a recovery end 3012. The open end is sleeved on the sludge return pipe. The inner wall of the open end is spaced 3 mm from the outer wall of the sludge return pipe. The bottom of the open end is 1 cm away from the opening of the sludge return pipe to prevent the sludge in the sludge return pipe from blocking the open end. The recovery end communicates with the open end and the hose. A hose interface is provided on the open end, and the hose is threadedly connected to the hose interface.

[0041] Example 5:

[0042] As Figure 1 and Figure 2As shown in the figure, an odor collection device for a hydrolysis acidification tank includes a sealing cover 1 disposed on the moving path of a sludge return pipe and a collection pipe 3 disposed on the sludge return pipe 2. The sealing cover includes a cover body 101 and a window 102 provided at the top of the cover body. The cover body is a cuboid cover surface, and the bottom of the cover body is open. A part of the opening of the cover body is immersed in the liquid of the hydrolysis acidification tank. The cover body is also provided with a one-way valve for gas to flow from outside the cover body to inside the cover body. The window is rectangular and matches the moving path of the sludge return pipe. The sludge return pipe can reciprocate in the window. A window track 1021 is provided on the window, and a sliding member 103 is provided on the track. The sliding member is sleeved on the sludge return pipe. Sealing materials 132 are provided at both ends of the sliding member not placed on the window track. The sealing materials are deodorizing membranes. One end of the sealing material is connected to the sliding member and the other end is connected to the side of the window. The sealing material and the sliding member cover the window to form a seal. A first magnetic member is provided on the sealing material, and a second magnetic member matching the first magnetic member is provided on the window track. The first magnetic member and the second magnetic member are magnetically connected. A collection member 301 is sleeved on the collection pipe. A hose 302 is provided on the collection member. One end of the hose communicates with the collection member, and the other end communicates with a gas collection device 303;

[0043] As Figure 3 shown, the sliding member includes a main body, a sliding member, a through hole, and two torsion rollers 131 symmetrically disposed at the bottom of the main body. The sliding member is a long strip-shaped slider. The sliding member is disposed on the side of the sliding body and is slidably connected to the window track. The sludge return pipe passes through the through hole to sleeved the sliding member on the sludge return pipe. The through hole is located on the main body; the torsion roller includes two symmetrically disposed fixing members 1311, a rotating shaft 1312, and a torsion spring 1313. The rotating shaft is located between the two symmetrically disposed fixing members and is rotatably connected to the fixing members. Torsion springs are provided at both ends of the rotating shaft. One end of the torsion spring is connected to the fixing member and the other end is connected to the rotating shaft. The sealing material is sleeved on the rotating shaft;

[0044] As Figure 4 shown, the collection member includes an open end 3011 and a recovery end 3012. The open end is sleeved on the sludge return pipe. The inner wall of the open end is spaced 3 mm from the outer wall of the sludge return pipe. The bottom of the open end is 1 cm away from the opening of the sludge return pipe to prevent the sludge in the sludge return pipe from blocking the open end. The recovery end communicates with the open end and the hose. A hose interface is provided on the open end. The hose is threadedly connected to the hose interface.

[0045] Example 6:

[0046] As Figure 1 and Figure 2As shown in the figure, an odor collection device for a hydrolysis acidification tank includes a sealing cover 1 provided on the moving path of a sludge return pipe and a collection pipe 3 provided on the sludge return pipe 2. The sealing cover includes a cover body 101 and a window 102 provided at the top of the cover body. The cover body is a cuboid cover surface, and the bottom of the cover body is open. A part of the opening of the cover body is immersed in the liquid of the hydrolysis acidification tank. The cover body is also provided with a one-way valve for gas to flow from outside the cover body into the cover body. The window is rectangular and matches the moving path of the sludge return pipe. The sludge return pipe can reciprocate in the window. A window track 1021 is provided on the window, and a sliding member 103 is provided on the track. The sliding member is sleeved on the sludge return pipe. Sealing materials 132 are provided at both ends of the sliding member not placed on the window track. The sealing material is a PES film. One end of the sealing material is connected to the sliding member and the other end is connected to the side of the window. The sealing material and the sliding member cover the window to form a seal. A first magnetic attraction member is provided on the sealing material, and a second magnetic attraction member matching the first magnetic attraction member is provided on the window track. The first magnetic attraction member and the second magnetic attraction member are magnetically connected. A collection member 301 is sleeved on the collection pipe. A hose 302 is provided on the collection member. One end of the hose communicates with the collection member, and the other end communicates with a gas collection device 303;

[0047] As Figure 3 shown in the figure, the sliding member includes a main body, a sliding member, a through hole, and two torsion rollers 131 symmetrically provided at the bottom of the main body. The sliding member is a long strip-shaped slider. The sliding member is provided on the side of the sliding body and is slidably connected to the window track. A roller is provided on the sliding member, and the roller is slidably connected to the window track. The sludge return pipe passes through the through hole to sleevethe sliding member on the sludge return pipe. The through hole is located on the main body; The torsion roller includes two symmetrically arranged fixing members 1311, a rotating shaft 1312, and a torsion spring 1313. The rotating shaft is located between the two symmetrically arranged fixing members and is rotatably connected to the fixing members. Torsion springs are provided at both ends of the rotating shaft. One end of the torsion spring is connected to the fixing member and the other end is connected to the rotating shaft. A sealing material is sleeved on the rotating shaft;

[0048] As Figure 4 shown in the figure, the collection member includes an open end 3011 and a recovery end 3012. The open end is sleeved on the sludge return pipe. The inner wall of the open end is spaced 3 mm from the outer wall of the sludge return pipe. The bottom of the open end is 1 cm away from the opening of the sludge return pipe to prevent the sludge in the sludge return pipe from blocking the open end. The recovery end communicates with the open end and the hose. A hose interface is provided on the open end, and the hose is threadedly connected to the hose interface.

[0049] The above is only a preferred embodiment of the present invention and does not impose any limitations on the present invention. Any simple modifications, changes, and equivalent transformations made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A hydrolysis acidification tank odor collection device, characterized in that: The invention comprises a sealing cover (1) arranged on the moving path of a sludge return pipe and a collecting pipe (3) arranged on the sludge return pipe (2), the collecting pipe comprising a collecting member (301) arranged on the sludge return pipe, a hose (302) connected to the collecting member, and a gas collecting device (303) connected to the hose, the sealing cover comprising a cover body (101) and a window (102) arranged on the cover body, the window being provided with a sliding member (103) sleeved on the sludge return pipe and slidably connected to the window, the sliding member being further provided with a torsion roller (131), the torsion roller comprising a fixing member (1311) arranged on the sliding member, a rotating shaft (1312) rotatably connected to the fixing member, and a torsion spring (1313) sleeved on the rotating shaft and respectively connected to the rotating shaft and the fixing member.

2. The odor collecting device for the hydrolysis acidification tank according to claim 1 is characterized in that: The twisting roller is sleeved with a sealing material (132) having one end connected to the window.

3. The odor collecting device for the hydrolysis acidification tank according to claim 2 is characterized in that: The sealing material is one of a polymer film and a foldable sheet.

4. The odor collecting device for a hydrolysis acidification tank according to claim 2 or 3, characterized in that: A first magnetic attraction component is disposed on the side of the sealing material, and a second magnetic attraction component matching the first magnetic attraction component is disposed on the window.

5. The odor collecting device for a hydrolysis acidification tank according to claim 1 is characterized in that: The collecting member comprises an opening end (3011) and a recovery end (3012), the opening end being sleeved on the sludge return pipe, and the recovery end being connected to a hose.

6. The odor collecting device for a hydrolysis acidification tank according to claim 1 is characterized in that: The gas collecting device is also provided with a rotating disk, and the hose is arranged on the rotating disk.

7. The odor collecting device for a hydrolysis acidification tank according to claim 2 is characterized in that: The window is provided with a window track (1021), and the sliding member is slidably connected along the window track.

8. The odor collecting device for a hydrolysis acidification tank according to claim 2 or 7, characterized in that: The sides of the window match the sides of the slide.

9. The odor collecting device for a hydrolysis acidification tank according to claim 2 is characterized in that: The open end of the cover body is immersed in the liquid of the hydrolysis acidification tank.

10. The odor collecting device for a hydrolysis acidification tank according to claim 2 or 9, characterized in that: A one-way valve is arranged on the cover body.

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