A replaceable filter type degassing membrane treatment device

Abstract

The application belongs to the technical field of nuclear power plant water treatment, and aims to solve the problems of traditional device, such as complicated maintenance and disassembly, inconvenient filter element replacement, low filtration and degassing efficiency, easy leakage or damage of filter element during operation, limited application scenarios and the like, and discloses a small-sized degassing membrane treatment device with detachable and replaceable filter, which comprises an air filter pipe, a filter unit, a pressure assembly and a stirring assembly. The filter unit bears a detachable and replaceable filter element. The air filter pipe is used for degassing the liquid filtered by the filter unit. The pressure assembly is used for providing self-adaptive adjustable compression force to the filter unit. The output end of the stirring assembly extends into the inside of the air filter pipe and is used for stirring the liquid in the air filter pipe to strengthen the gas escape. The application can better adapt to the operation condition of nuclear power unit, can improve the treatment capacity of the original oxygen removal system, can reduce the equipment floor area, can widen the equipment operation and maintenance space and personnel operation space of the nuclear power plant area, and can effectively reduce the safety hidden danger of nuclear power site operation.

Description

Technical Field

[0001] This application belongs to the field of nuclear power plant water treatment technology, and in particular relates to a small degassing membrane treatment device with a replaceable filter. Background Technology

[0002] Small-scale degassing membrane treatment devices are core equipment for fluid purification in laboratories and small-scale industrial settings. They are mainly used to filter out liquid impurities and remove dissolved gases. These devices are compact, highly adaptable, and are now widely used in precision testing, small-scale processing and production. They also have good application potential in nuclear power units, where they can upgrade conventional ambient temperature deoxygenation systems to effectively reduce the oxygen content of the primary and secondary loop water, ensuring the safe and stable operation of the unit.

[0003] Existing equipment generally integrates filtration and degassing functions, relying on filter elements to trap impurities and membrane modules to separate gases, which can meet basic fluid treatment requirements. However, there is still considerable room for improvement in structural design, ease of operation, and treatment efficiency. The main problems with existing equipment are as follows: The existing equipment uses a bolt-fastened, modular assembly structure. Replacing the filter element requires disassembling multiple connecting components, which not only requires specialized tools and professional operators, but also involves complex and time-consuming maintenance procedures. Furthermore, it is highly susceptible to sealing leaks due to improper disassembly or assembly. In addition, some units have an unreasonable filter element layout, resulting in uneven liquid filtration and a lack of effective mass transfer enhancement structures, leading to low degassing efficiency and failing to meet the high-precision processing requirements of nuclear power plants. Summary of the Invention

[0004] The purpose of this application is to provide a small degassing membrane treatment device with a replaceable filter, which solves the problems of traditional small degassing membrane treatment devices such as cumbersome maintenance and disassembly, inconvenient filter replacement, low filtration and degassing efficiency, easy leakage or damage to the filter during operation, and limited applicable scenarios.

[0005] To achieve the above objectives, this application provides the following technical solution: A small degassing membrane treatment device with replaceable filter has a housing and a cover on top of the housing. The device includes an air filter tube, a filter unit, a pressure component, and a stirring component. The filter unit is located inside the housing and carries a replaceable filter element. The air filter tube is located below the filter unit for degassing the liquid filtered by the filter unit. The pressure component is located inside the cover and elastically presses against the top of the filter unit to provide an adaptively adjustable clamping force to the filter unit. The stirring component is located between the filter unit and the air filter tube, and the output end of the stirring component extends into the air filter tube to stir the liquid inside the air filter tube to enhance gas escape.

[0006] In one possible implementation, the filtration unit includes a mounting plate, a support plate, and filter elements, wherein the mounting plate is disposed within the housing, the support plate is mounted below the mounting plate, and a plurality of filter elements are mounted on the mounting plate.

[0007] As one possible approach, a sealing gasket is provided between the mounting plate and the support plate.

[0008] As one possible implementation, the filter unit is provided with a partition and a cover plate below it, the air filter tube is located below the cover plate, and a circular tube is provided between the partition and the cover plate.

[0009] As one possible implementation, the stirring assembly includes a motor mounted on top of the cover plate, the motor's output shaft passing through the cover plate and extending into the air filter tube, and the output shaft having a plurality of blades.

[0010] As one possible implementation, the output shaft of the motor is rotatably connected to the cover plate, and the plurality of blades are linearly and equally spaced.

[0011] In one feasible embodiment, the pressure assembly includes a fixed plate, a hollow cylinder, a spring, and a slide rod. The hollow cylinder is mounted on the bottom of the fixed plate, and the spring is disposed inside the hollow cylinder. One end of the slide rod abuts against the bottom of the spring, and the other end extends out of the hollow cylinder. The slide rod is slidably disposed with respect to the hollow cylinder.

[0012] As one possible implementation, the fixing plate is fixedly installed inside the cover, and the fixing plate is provided with a peristaltic pump, the water inlet of the peristaltic pump extending outside the cover, and the water outlet of the peristaltic pump passing through the fixing plate.

[0013] As one possible implementation, the other end of the slide bar is provided with a rubber pad, which presses against the top of the filter unit.

[0014] As one possible implementation, the slide bar is slidably connected to the hollow cylinder, and the surface of the rubber pad is provided with anti-slip texture.

[0015] As one possible implementation, the bottom of the air filter tube is provided with a base plate, the bottom of the base plate is provided with a pressure valve, and the circumferential wall of the outer shell is provided with an air outlet, one end of which extends to one side of the air filter tube.

[0016] As an implementable approach, the device also includes a quick-release assembly installed at the junction between the housing and the cover to enable tool-free quick assembly and disassembly of the two.

[0017] As one possible implementation, the quick-release assembly includes two rings, both of which are fitted onto the outer casing and the cover. One end of each ring is fixed with a retaining plate. One retaining plate has a threaded post, and the other retaining plate has a locking buckle. The threaded post passes through the two retaining plates and engages with the locking buckle.

[0018] As one possible implementation, the threaded post is slidably connected to the fixed plate, and the latch is threadedly connected to the threaded post.

[0019] As one possible approach, several of the filter elements are arranged in a ring with equal spacing.

[0020] As one possible implementation, the other ends of the two rings are rotatably connected.

[0021] Compared with the prior art, the small degassing membrane treatment device with replaceable filter provided in this application has the following advantages: This application is better suited to the operating conditions of nuclear power units. With its advantages of high-efficiency deoxygenation, compact footprint, and convenient disassembly and assembly of internal components, this device can not only improve the processing capacity of the original deoxygenation system, but also reduce the equipment footprint, expand the space for equipment maintenance and personnel operation in the nuclear power plant area, and significantly reduce the workload of parts replacement and maintenance, effectively reducing safety hazards at nuclear power plant sites.

[0022] Furthermore, this application significantly improves the ease of maintenance and operational efficiency of the device through the design of quick-release components and an integrated filter element installation structure. The filter element is plug-and-play, with one-button installation and removal, eliminating the need for separate installation of clips, sealing rings, adapters, etc. This device employs a quick-release design with two rotatable connecting rings, threaded posts, and locks, allowing for rapid disassembly and assembly of the cover and outer shell without the need for specialized tools. Combined with the integrated installation method of the mounting plate and filter element, this completely solves the problems of cumbersome disassembly and time-consuming maintenance associated with traditional degassing membrane devices.

[0023] Furthermore, this application utilizes a combination structure of springs, slide rods, and rubber pads in the pressure assembly. This structure can automatically adapt to the installation state of the mounting plate, providing stable clamping force. Additionally, the anti-slip texture enhances the sealing performance, preventing liquid leakage during the filtration and degassing process. This ensures that the device can quickly return to a sealed operating state after maintenance, allowing a single person to complete maintenance in a short time, significantly reducing the operational threshold.

[0024] Furthermore, this application effectively improves filtration accuracy and degassing efficiency through the stirring assembly and the scientifically arranged filter element and air filter tube. That is, the filter element and air filter tube are arranged from top to bottom, which reduces pressure loss during the flow process, and the horizontal flow increases the contact area to prevent the formation of flow dead zones.

[0025] Furthermore, several annularly spaced filter elements ensure that the liquid to be treated flows uniformly through the filtration area, achieving comprehensive impurity interception. The sealing gasket further prevents leakage of unfiltered liquid, ensuring filtration efficiency. The stirring structure, driven by a motor to rotate linearly spaced paddles, breaks down the liquid boundary layer, enhances the contact strength and uniformity between the liquid and the air filter tube, and promotes the rapid escape of dissolved gases from the liquid. Combined with the directional exhaust design of the air outlet, the degassing process becomes more efficient and thorough. The circular tube between the baffle and the cover plate plays a precise guiding role, avoiding liquid flow turbulence from affecting the continuity of filtration and degassing, significantly improving the purity of the treated liquid, and meeting the high-precision requirements of nuclear power plants for fluid processing.

[0026] Furthermore, this application utilizes dynamic pressure regulation and multi-component collaborative adaptation. The spring, slide bar, and fixing plate work together to form an adaptive clamping force, ensuring the device's operational stability and applicability. The spring and slide bar within the hollow cylinder of the pressure assembly form an elastic buffer structure, automatically adjusting the slide bar's extension and retraction based on liquid pressure fluctuations. This ensures the rubber pad maintains stable pressure on the mounting plate, preventing damage to the filter element from excessive pressure and sealing failure from insufficient pressure, thus extending the filter element's lifespan. The peristaltic pump provides a stable liquid flow input, and the pressure valve flexibly controls the discharge rate of the treated liquid, adapting to flow requirements in different scenarios. The device has a compact overall structure, capable of processing various liquids such as aqueous solutions and small-scale industrial raw materials, and meeting the needs of various scenarios including laboratory precision processing and small-scale continuous production operations, demonstrating strong practicality and versatility. Attached Figure Description

[0027] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the technical description will be briefly introduced below.

[0028] Figure 1 A schematic diagram of the overall structure of the small degassing membrane treatment device with replaceable filter provided in this application; Figure 2 A detailed internal structural diagram of the lid provided for this application; Figure 3 A detailed internal structural diagram of the casing provided for this application; Figure 4 A detailed structural diagram of a portion of the area at the buckle location provided in this application; Figure 5 A detailed structural diagram of a portion of the area where the fixing plate is located, as provided in this application; Figure 6 yes Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 A detailed structural diagram of a portion of the area where the air filter pipe is located, as provided in this application; Figure 8This is a detailed internal structural diagram of the air filter tube provided in this application.

[0029] Explanation of reference numerals in the attached figures: 1. Outer shell; 2. Cover; 3. Ring buckle; 4. Fixing plate; 5. Air outlet; 6. Fixing plate; 7. Peristaltic pump; 8. Partition plate; 9. Cover plate; 10. Air filter tube; 11. Threaded column; 12. Locking buckle; 13. Hollow cylinder; 14. Spring; 15. Slide rod; 16. Rubber pad; 17. Mounting plate; 18. Bearing plate; 19. Sealing gasket; 20. Filter element; 21. Round tube; 22. Base plate; 23. Pressure valve; 24. Motor; 25. Paddle blade. Detailed Implementation

[0030] The following detailed description provides further details on specific implementation methods.

[0031] like Figures 1 to 8 As shown in the figure, this application provides a small degassing membrane treatment device with a replaceable filter, including a shell 1, a cover 2, a ring 3, an air filter tube 10, a filter unit, a pressure component, a quick-release component, and a stirring component.

[0032] A cover 2 is detachably mounted on the top of the outer casing 1. After the cover 2 is installed, two rings 3 are fitted onto the joint between the outer casing 1 and the cover 2, achieving a quick seal between the outer casing 1 and the cover 2 by fixing the rings 3. A filter unit is fixedly installed inside the outer casing 1 to support the replaceable filter element 20. An air filter tube 10 is fixedly installed inside the outer casing 1 and arranged below the filter unit for degassing the liquid filtered by the filter unit. A pressure component is installed inside the cover 2 and elastically presses against the top of the filter unit to provide an adaptively adjustable clamping force to the filter unit. A quick-release component is installed between the outer casing 1 and the cover 2 to enable tool-free quick assembly and disassembly of both the outer casing 1 and the cover 2. A stirring component is installed inside the outer casing 1, and the output end of the stirring component extends into the interior of the air filter tube 10 to stir the liquid inside the air filter tube 10 to enhance gas escape.

[0033] like Figure 3 , Figure 7 and Figure 8 As shown, the filter unit includes a mounting plate 17, a support plate 18, and several filter elements 20. The support plate 18 is fixedly installed inside the housing 1, the mounting plate 17 is installed on the support plate 18, and several filter elements 20 are installed on the mounting plate 17. Inside the housing 1 and below the support plate 18, a partition plate 8 and a cover plate 9 are fixedly installed, and an air filter pipe 10 is provided below the cover plate 9.

[0034] Preferably, the filter unit further includes a sealing gasket 19, which is disposed between the mounting plate 17 and the support plate 18.

[0035] Preferably, the filter elements 20 are arranged in a ring with equal spacing.

[0036] It should be noted that this application selects precision filter elements with different precision (5 microns, 3 microns, 1 micron) according to different scenarios.

[0037] The pressure assembly is located inside the cover 2 and provides pressure to the mounting plate 17. For example... Figure 5 and Figure 6 As shown, the pressure assembly includes a fixed plate 6, a hollow cylinder 13, a spring 14, and a slide rod 15. The fixed plate 6 is installed inside the cover 2. The hollow cylinder 13 is installed at the bottom of the fixed plate 6. The spring 14 and the slide rod 15 are disposed inside the hollow cylinder 13. A portion of the slide rod 15 is disposed inside the hollow cylinder 13, and the slide rod 15 is slidably connected to the hollow cylinder 13. The slide rod 15 is located at the bottom of the spring 14, and one end (top) of the slide rod 15 is abutted by the spring 14. The other end (bottom) of the slide rod 15 passes through the hollow cylinder 13 and extends to the outside of the hollow cylinder 13.

[0038] Preferably, the pressure assembly includes two hollow cylinders 13, which are fixedly mounted on the bottom of the fixed plate 6.

[0039] Preferably, a rubber pad 16 is fixedly installed at the bottom of the slide bar 15, and the rubber pad 16 presses against the mounting plate 17 of the filter unit.

[0040] Preferably, the surface of the rubber pad 16 is provided with anti-slip texture. The anti-slip texture design further enhances the friction between the rubber pad 16 and the mounting plate 17, so that when the pressure component is in operation, the rubber pad 16 can adhere more firmly to the mounting plate 17, reducing the slippage caused by factors such as liquid flow or external vibration. This not only helps to maintain stable pressure, but also improves the reliability of the seal, further ensuring the smooth progress of the filtration and degassing process.

[0041] During the filtration and degassing process, the pressure component continues to function. When the liquid pressure fluctuates or the mounting plate 17 is slightly displaced, the spring 14 inside the hollow cylinder 13 drives the slide bar 15 to slide up and down through elastic deformation, so that the rubber pad 16 always maintains a stable pressure on the mounting plate 17, which not only ensures the reliability of the seal, but also avoids excessive pressure from damaging the filter element 20.

[0042] A quick-release assembly is arranged between the outer casing 1 and the cover 2, and is used for quick disassembly of the outer casing 1. The quick-release assembly includes two rings 3 and two retaining pieces 4, with the two rings 3 rotatably connected. Both rings 3 are fitted onto the outer casing 1 and the cover 2, with one end of each ring 3 (e.g., ...) Figure 4The front end shown is fixedly mounted with fixing plates 4. One fixing plate 4 has a threaded post 11 on one side, with one end of the threaded post 11 passing through both fixing plates 4. The other fixing plate 4 is fitted with a locking buckle 12. The threaded post 11 is slidably connected to the fixing plate 4, and the locking buckle 12 is threadedly connected to the threaded post 11. When the filter element 20 needs to be replaced or the device needs to be cleaned, loosen the locking buckle 12 of the quick-release assembly, pull out the threaded post 11, and rotate the two ring buckles 3 in the opposite direction to quickly open the cover 2 and take out the mounting plate 17 and the filter element 20 for replacement or cleaning.

[0043] The other ends of the two rings 3 are rotatably connected. When the lock 12 is loosened, the two rings 3 can be rotated open relative to each other due to the rotatable connection of the other ends of the rings 3, making it convenient for the operator to remove the rings 3 from the outer shell 1 and the cover 2.

[0044] During normal use, the locking buckle 12 is tightened onto the threaded post 11, securely connecting the two fixing pieces 4 together. This ensures that the two ring buckles 3 are tightly fitted onto the outer casing 1 and the cover 2, maintaining a sealed state and preventing gas or liquid leakage. When it is necessary to replace the filter element 20 or clean the device, since the locking buckle 12 is threadedly connected to the threaded post 11, it can be easily loosened by using an appropriate tool and turning the locking buckle 12 counterclockwise.

[0045] The stirring assembly is located inside the shell 1 and is used to stir the liquid. The device is sealed and assembled using a quick-release assembly. The stirring assembly includes a motor 24, which is fixedly mounted on the top of the cover plate 9. The output shaft of the motor 24 passes through the cover plate 9 and extends into the air filter pipe 10. Several impellers 25 are fixedly mounted on the output shaft of the motor 24. The arrangement and structure of the impellers 25 are as follows... Figure 8 As shown.

[0046] Preferably, a plurality of blades 25 are arranged in a linear, equidistant manner.

[0047] The motor 24 is started. The output shaft of the motor 24 extends through the cover plate 9 into the air filter tube 10, driving several paddles 25 to rotate, stirring the filtered liquid, breaking the liquid boundary layer, improving the contact efficiency between the liquid and the air filter tube 10, and creating conditions for the subsequent degassing process.

[0048] The output shaft of the motor 24 is rotatably mounted on the cover plate 9. Several paddles 25 are arranged in a linear and equidistant structure. This linear and equidistant structure design allows the paddles 25 to act evenly on the filtered liquid during rotation. When the motor 24 drives the paddles 25 to rotate, each paddle 25 can produce a stable and consistent stirring effect in its own position, avoiding uneven stirring of the liquid in certain areas.

[0049] like Figure 7 and Figure 8As shown, a base plate 22 is provided at the bottom of the air filter tube 10, and a pressure valve 23 is fixedly installed at the bottom of the base plate 22. An air outlet 5 is fixedly installed on the circumferential wall of the outer casing 1, with one end of the air outlet 5 penetrating the outer casing 1 and extending to one side of the air filter tube 10. The pressure valve 23 can automatically adjust its opening and closing according to the internal pressure to ensure that the pressure inside the air filter tube 10 is maintained within a suitable range, avoiding excessive or insufficient pressure from affecting the degassing effect. After the filtered liquid is fully contacted with the air filter tube 10 for degassing under the stirring of the paddle 25, the generated gas can be discharged from the device through the air outlet 5.

[0050] like Figure 2 , Figure 3 and Figure 5 As shown, a peristaltic pump 7 is provided on the fixed plate 6, and several filter elements 20 are arranged in a ring with equal spacing. A circular tube 21 is provided between the partition plate 8 and the cover plate 9. The water inlet of the peristaltic pump 7 passes through the cover 2 and extends to the outside of the device. The water inlet is connected to the water source to be treated. The water outlet of the peristaltic pump 7 passes through the fixed plate 6. The peristaltic pump 7 can transport external liquid to the inside of the device. When the liquid enters the device through the peristaltic pump 7, it will first reach the space below the fixed plate 6. Since the several filter elements 20 are arranged in a ring with equal spacing, the liquid can contact each filter element 20 evenly, thereby achieving effective filtration.

[0051] The working principle of the small degassing membrane treatment device with replaceable filter provided in this embodiment is as follows: The device is sealed and assembled using a quick-release assembly. The annularly spaced filter elements 20 are installed on the mounting plate 17, ensuring the mounting plate 17 and the support plate 18 are in contact via the sealing gasket 19. After closing the cover 2, two ring buckles 3 are fitted onto the connection between the outer shell 1 and the cover 2. The ring buckles 3 are rotated to align the two end fixing pieces 4, which are then inserted into the threaded post 11 and tightened with the locking buckle 12, achieving a quick seal between the outer shell 1 and the cover 2. During filtration and degassing, the pressure assembly continues to function.

[0052] The spring 14 inside the hollow cylinder 13 at the bottom of the fixed plate 6 pushes the slide rod 15 down, causing the rubber pad 16 to press against the mounting plate 17. The anti-slip texture on the surface of the rubber pad 16 enhances the friction and further ensures the sealing of the filtration process.

[0053] The peristaltic pump 7 on the fixed plate 6 is started. The water inlet of the peristaltic pump 7 draws the liquid to be treated from the outside and delivers it to the filtration area inside the outer shell 1 after passing through the fixed plate 6 through its outlet. This provides a stable liquid flow for subsequent filtration and degassing operations. The liquid to be treated flows through several annular equally spaced filter elements 20 on the mounting plate 17. The filter elements 20 perform the filtration function, intercepting particulate impurities in the liquid and achieving preliminary purification.

[0054] In this embodiment, a sealing gasket 19 is used. The sealing gasket 19 effectively prevents liquid from leaking through the gap between the mounting plate 17 and the support plate 18, ensuring that all liquid passes through the filter element 20 to complete filtration.

[0055] The motor 24 on the top of the cover plate 9 is started. The output shaft of the motor 24 extends through the cover plate 9 into the air filter tube 10, driving several linearly and equally spaced paddles 25 to rotate, stirring the filtered liquid, breaking the liquid boundary layer, improving the contact efficiency between the liquid and the air filter tube 10, and creating conditions for the subsequent degassing process.

[0056] After stirring, the liquid enters the air filter tube 10 area. The dissolved gas in the liquid escapes through the membrane structure of the air filter tube 10. The escaped gas is discharged outside the device through the air outlet 5 on the circumferential wall of the outer shell 1, completing the degassing process. The circular tube 21 between the partition plate 8 and the cover plate 9 plays a guiding role, ensuring that the liquid flows smoothly through the air filter tube 10 area and avoiding liquid flow turbulence that affects the degassing effect.

[0057] During the filtration and degassing process, the pressure component continues to function. When the liquid pressure fluctuates or the mounting plate 17 is slightly displaced, the spring 14 inside the hollow cylinder 13 drives the slide rod 15 to slide up and down through elastic deformation, so that the rubber pad 16 always maintains a stable pressure on the mounting plate 17, which not only ensures the reliability of the seal, but also avoids excessive pressure from damaging the filter element 20.

[0058] The filtered and degassed liquids that meet the standards are collected in the base plate 22 area. The discharge speed is controlled by the pressure valve 23 at the bottom of the base plate 22, and the treated liquids are discharged to external storage containers or subsequent equipment as needed.

[0059] When the filter element 20 needs to be replaced or the device needs to be cleaned, loosen the locking buckle 12 of the quick-release assembly, pull out the threaded post 11, flip the two rotatable connecting rings 3, and the cover 2 can be opened quickly. Take out the mounting plate 17 and the filter element 20 for replacement or cleaning, and then restart the device operation.

[0060] The above description is only a specific embodiment of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A portable filterable degassing membrane treatment device having a housing (1) and a lid (2) arranged thereon, characterized in that, The device includes an air filter tube (10), a filter unit, a pressure component, and a stirring component; The filter unit is located inside the housing (1) and carries a replaceable filter element (20). The air filter tube (10) is located below the filter unit and degasses the liquid filtered by the filter unit. The pressure component is located inside the cover (2) and elastically presses against the top of the filter unit to provide adaptively adjustable clamping force to the filter unit. The stirring component is located between the filter unit and the air filter tube (10). The output end of the stirring component extends into the air filter tube (10) to stir the liquid inside the air filter tube (10).

2. The portable, filterable, mini degasification membrane treatment device of claim 1, wherein, The filtration unit includes a mounting plate (17), a support plate (18), and filter elements (20). The mounting plate (17) is located inside the housing (1). The support plate (18) is installed below the mounting plate (17). A plurality of filter elements (20) are installed on the mounting plate (17).

3. The portable, filterable, mini degasification membrane treatment device of claim 2, wherein, A sealing gasket (19) is provided between the mounting plate (17) and the bearing plate (18).

4. The small degassing membrane treatment device with replaceable filter according to claim 1, characterized in that, The filter unit is provided with a partition (8) and a cover plate (9) below it. The air filter pipe (10) is located below the cover plate (9). A round pipe (21) is provided between the partition (8) and the cover plate (9).

5. The small degassing membrane treatment device with replaceable filter according to claim 4, characterized in that, The stirring assembly includes a motor (24), which is mounted on the top of the cover plate (9). The output shaft of the motor (24) passes through the cover plate (9) and extends into the air filter pipe (10). The output shaft is provided with a plurality of blades (25).

6. The small degassing membrane treatment device with replaceable filter according to claim 1, characterized in that, The pressure assembly includes a fixed plate (6), a hollow cylinder (13), a spring (14), and a slide rod (15). The hollow cylinder (13) is installed at the bottom of the fixed plate (6). The spring (14) is installed inside the hollow cylinder (13). One end of the slide rod (15) abuts against the bottom of the spring (14) and the other end extends out of the hollow cylinder (13). The slide rod (15) is slidably disposed with the hollow cylinder (13).

7. The small degassing membrane treatment device with replaceable filter according to claim 6, characterized in that, The other end of the slide bar (15) is provided with a rubber pad (16), which presses against the top of the filter unit.

8. The small degassing membrane treatment device with replaceable filter according to claim 6, characterized in that, The fixed plate (6) is provided with a peristaltic pump (7), the water inlet of the peristaltic pump (7) extends out of the cover (2), and the water outlet of the peristaltic pump (7) passes through the fixed plate (6).

9. The small degassing membrane treatment device with replaceable filter according to claim 1, characterized in that, The bottom of the air filter tube (10) is provided with a base plate (22), and the bottom of the base plate (22) is provided with a pressure valve (23). The outer shell (1) has an air outlet (5) on its circumferential wall, and one end of the air outlet (5) extends to one side of the air filter tube (10).

10. The small degassing membrane treatment device with replaceable filter according to claim 1, characterized in that, The device also includes two rings (3), which are installed at the junction of the outer shell (1) and the cover (2). One end of each ring (3) is equipped with a fixing piece (4). One of the fixing pieces (4) is provided with a threaded post (11), which passes through the two fixing pieces (4). The other fixing piece (4) is provided with a latch (12).

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