Microalgae membrane biological coupling sewage purification equipment

Abstract

The application discloses a kind of microalgae membrane biological coupling sewage purification equipment in the technical field of sewage purification, including treatment pool, sludge-water separation membrane and drainage pipe below sludge-water separation membrane;The application is in the process of microalgae and microorganism coupling purification to sewage, by setting swing mechanism on the surface of mounting frame makes filter screen can overturn, and using limiting mechanism to limit swing mechanism, make swing mechanism and mounting frame keep stable, when mounting frame is installed to the inside of treatment pool, swing mechanism extrudes elastic expansion piece;Subsequently after sewage treatment ends, make limiting mechanism release the limiting of swing mechanism, elastic expansion piece lengthens and releases elastic potential energy, and swing mechanism and filter screen are bounced up, so that the position of installed filter screen is exposed, airflow can pass directly, increase the airflow exchange rate of mounting frame and gas exchange membrane upper and lower parts, reduce pressure difference, so that mounting frame and gas exchange membrane can be smoothly and quickly lifted.

Description

Technical Field

[0001] This invention relates to the field of wastewater purification technology, specifically to a microalgae membrane biocoupled wastewater purification device. Background Technology

[0002] In the process of microalgae-biological coupling purification of wastewater, the ideal goal of existing technologies is to build a synergistic symbiotic system: that is, to use the photosynthesis of microalgae to provide aerobic microorganisms with the necessary oxygen (O2), while the respiration of microorganisms provides carbon source (CO2) for microalgae, thereby reducing energy consumption and deeply removing pollutants.

[0003] To achieve the above objectives, a partitioned culture method is commonly used, placing microalgae and microorganisms in separate reaction zones, with gas exchange membranes (such as...) installed between them. Figure 1 As shown, the membrane allows gas exchange but blocks liquid flow, thereby maintaining the transfer of gaseous substances while effectively isolating the microalgae reaction zone from the microbial reaction zone. In addition, by configuring a filter screen to promote water flow, the mutual interference between microalgae and microorganisms is reduced, thereby enhancing the coupling purification effect of the system. However, in practical applications, gas exchange membranes are usually fixed inside the treatment tank using an installation frame. The installed frame and the gas exchange membrane together divide the treatment tank into an upper microalgae reaction chamber and a lower microbial reaction chamber, forming a sealed structure. This design faces certain problems during subsequent disassembly: after the water in the treatment tank is drained, microalgae easily adhere to the surface of the gas exchange membrane and filter screen, hindering gas flow when the installation frame is lifted; at the same time, due to the small gap between the side wall of the installation frame and the inner wall of the treatment tank, a large air resistance is easily formed during the lifting process, making it difficult to remove the frame smoothly and quickly; in addition, if there are differences in the gaps between the different sides of the installation frame and the tank wall, it will cause uneven airflow distribution and changes in flow velocity, further causing the frame to shake, affecting the stability and operational efficiency of the removal process. Summary of the Invention

[0004] The purpose of this invention is to provide a microalgae membrane biocoupled wastewater purification device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a microalgae membrane biocoupled wastewater purification device, comprising a treatment tank, a sludge-water separation membrane, and a drainage pipe located below the sludge-water separation membrane; The treatment tank is equipped with an installation frame via a support mechanism. A gas exchange membrane is fixedly connected to the inner side of the installation frame. The gas exchange membrane allows gas to pass through but blocks liquid. The installation frame and the gas exchange membrane divide the treatment tank into an upper microalgae reaction chamber and a lower microbial reaction chamber. A filter screen is installed on the inner surface of the installation frame via a swing mechanism. The swing mechanism is used to move the filter screen, which is used to filter microalgae in the wastewater above the gas exchange membrane. The surface of the installation frame is provided with a limiting mechanism for limiting the swing mechanism. The support mechanism is provided with an elastic telescopic member below the swing mechanism. The elastic telescopic member is used to spring the swing mechanism upward when the limiting mechanism releases its limit on the swing mechanism.

[0006] As a further embodiment of the present invention, the support mechanism includes a support frame, which is fixedly connected to the inner wall surface of the treatment pool, the mounting frame is located above the support frame, and the elastic telescopic member is fixedly connected to the inner surface of the support frame.

[0007] As a further embodiment of the present invention, the swing mechanism includes a fixed frame fixedly connected to the inner side of the mounting frame, a swing frame provided on the inner side of the fixed frame via a rotating column, the filter screen being installed in the swing frame, the swing frame being able to drive the filter screen to swing, and the elastic telescopic member being located below the swing frame.

[0008] As a further embodiment of the present invention, the limiting mechanism includes a positioning block disposed in a groove on the inner surface of the mounting frame corresponding to the position of the swing frame, and the positioning block extends to the outside of the groove to limit the swing frame.

[0009] As a further embodiment of the present invention, an L-shaped through groove extending to the top of the inner wall surface of the treatment pool is provided, and a limiting block with an inclined end is elastically slidably connected in the through groove. The limiting block is used to limit the installation frame.

[0010] As a further embodiment of the present invention, a release rod with a sloping bottom is slidably connected in the through groove, and the upper end of the limiting block is also sloping. When the release rod moves downward, it can squeeze the limiting block into the through groove. Multiple sides of the positioning block are provided with a retractable first elastic element between them and the inner wall of the groove. The first elastic element is used to provide elastic force to the positioning block to reset it. The upper end of the positioning block is provided with a sloping surface, and the bottom of the limiting block is provided with a protrusion. The protrusion is used to drive the positioning block into the groove when the limiting block moves into the through groove.

[0011] As a further embodiment of the present invention, a sealing plate is elastically hinged to the inner side of the mounting frame corresponding to the bottom of the fixing frame. The sealing plate is used to seal the bottom of the fixing frame and the filter screen. The sealing plate and the bottom of the fixing frame are magnetically attached. The elastic telescopic member passes through the sealing plate, and the part of the sealing plate corresponding to the elastic telescopic member can extend and retract. The sealing plate is constructed to be able to flip down and open when a negative pressure is formed in the microbial reaction chamber.

[0012] As a further embodiment of the present invention, the fixed frame is provided with a sliding groove corresponding to the position of the rotating column, and a retractable second elastic block is fixedly connected in the sliding groove. The upper end of the second elastic block is slidably connected to the surface of the rotating column. An extension block is slidably connected to the bottom of the swing frame. The upper end of the elastic telescopic member is provided with an inclined surface. The extension block is located between the upper inclined surface of the elastic telescopic member and the mounting frame. When the rotating column moves downward, the extension block can maintain its fit with the upper end of the elastic telescopic member.

[0013] As a further embodiment of the present invention, a sealing strip with a triangular cross-section is fixedly connected to the bottom of the mounting frame, and a sealing groove is provided on the surface of the support frame.

[0014] As a further embodiment of the present invention, a barrier plate is fixedly connected to the surface of the mounting frame, and a plurality of equally spaced air vents are provided on the surface of the barrier plate, wherein the cross-section of the air vents is trapezoidal with a wider bottom and a narrower top.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In the process of coupled purification of wastewater using microalgae and microorganisms, this invention utilizes a swing mechanism on the surface of the mounting frame to allow the filter screen to flip. A limiting mechanism further restricts the swing mechanism, ensuring stability between the swing mechanism and the mounting frame. When the mounting frame is installed inside the treatment tank, the swing mechanism compresses the elastic expansion member, placing it in a compressed, energy-storing state, allowing the filter screen to filter the water normally. After wastewater treatment, the limiting mechanism releases the swing mechanism, causing the elastic expansion member to extend and release its elastic potential energy, lifting the swing mechanism and filter screen upwards. This exposes the filter screen, allowing airflow to pass directly through, increasing the airflow exchange rate between the upper and lower parts of the mounting frame and the gas exchange membrane, reducing the pressure difference, and enabling the mounting frame and gas exchange membrane to be lifted smoothly and quickly. This prevents airflow from being unable to quickly reach the area below the mounting frame and gas exchange membrane, which would otherwise create significant airflow resistance and hinder the upward movement of the mounting frame and gas exchange membrane.

[0016] In this invention, the support frame can support the mounting frame, so that the mounting frame can be stably placed in the processing pool. When the mounting frame moves to the surface of the support frame, the swing mechanism can move above the elastic telescopic member and squeeze it.

[0017] In this invention, during the process of the installation frame moving into the treatment tank to the position of the support frame, the swing frame is limited by the limiting mechanism and moves synchronously with the installation frame. When the swing frame moves downward to the surface of the support frame, it can squeeze the elastic telescopic member, and the filter screen can filter the water flow normally. When it is necessary to remove the installation frame, the limiting mechanism releases the limitation on the swing frame, and the elastic telescopic member bounces the swing frame upward, causing the filter screen to flip upward with the swing frame, thereby allowing air to circulate quickly and reducing the wind resistance encountered by the installation frame during movement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of wastewater treatment in the treatment tank (W1: microalgae reaction chamber, W2: microbial reaction chamber, G: light, S: wastewater flow path). Figure 2 This is a schematic diagram of the swing frame and filter screen after they are flipped upwards in this invention (α1 in the figure is the rotation angle of the swing frame). Figure 3 This is a schematic diagram of the overall cross-section of the present invention; Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle; Figure 5 for Figure 4 Schematic diagram of the structure at point B; Figure 6 for Figure 4 Schematic diagram of the structure at point C; Figure 7 This is a schematic diagram showing the positional relationship between the mounting frame, gas exchange membrane, fixing frame, and filter screen in this invention; Figure 8 This is a schematic diagram of the structure of the mounting frame, gas exchange membrane, and filter screen after being cut open in this invention; Figure 9 for Figure 8 Schematic diagram of the structure at point D; Figure 10 This is a schematic diagram of the structure of the closed plate after it is flipped downwards in this invention (α2 in the figure is the angle of downward rotation of the closed plate). Figure 11 This is a schematic diagram of the structure of the rotating column, the swing frame and the filter screen after they move downwards on the side closest to the rotating column when filtering water flow in the present invention. Figure 12 for Figure 11 Schematic diagram of the structure at point E (in the diagram, L is the downward movement distance of the rotating column, and α3 is the downward tilt angle of the swing frame and the filter screen). Figure 13 This is a schematic diagram of the internal structure of the treatment tank in this invention; Figure 14 for Figure 13 Schematic diagram of the structure at point F; Figure 15 This is a schematic diagram of the overall structure of the present invention.

[0019] In the attached diagram, the components represented by each number are as follows: 1-Treatment tank, 2-Mud-water separation membrane, 3-Drainage pipe, 4-Mounting frame, 5-Gas exchange membrane, 6-Fixing frame, 7-Filter screen, 8-Sealing plate, 9-Support frame, 10-Rotating column, 11-First elastic element, 12-Slide groove, 13-Second elastic block, 14-Extension block, 16-Through groove, 17-Limiting block, 18-Release rod, 19-Swing frame, 20-Elastic telescopic component, 21-Groove, 22-Positioning block, 23-Protrusion block, 24-Sealing strip, 25-Sealing groove, 26-Blocking plate, 27-Ventilation port. Detailed Implementation

[0020] Please see Figures 1-15 The present invention provides a technical solution: a microalgae membrane biocoupled wastewater purification device, including a treatment tank 1, a mud-water separation membrane 2 and a drain pipe 3 located below the mud-water separation membrane 2; Inside the treatment tank 1, a mounting frame 4 is installed via a support mechanism. A gas exchange membrane 5 is fixedly connected to the inside of the mounting frame 4. The gas exchange membrane 5 allows gas to pass through but blocks liquid. The mounting frame 4 and the gas exchange membrane 5 divide the treatment tank 1 into an upper microalgae reaction chamber and a lower microbial reaction chamber. A filter screen 7 is installed on the inner surface of the mounting frame 4 via a swing mechanism. The swing mechanism is used to move the filter screen 7. The filter screen 7 is used to filter microalgae in the sewage above the gas exchange membrane 5. A limiting mechanism is provided on the surface of the mounting frame to limit the swing mechanism. An elastic telescopic member 20 is provided below the swing mechanism on the support mechanism. The elastic telescopic member is used to bounce the swing mechanism upward when the limiting mechanism releases the limit on the swing mechanism. During the process of purifying wastewater by coupling microalgae and microorganisms, when the installation frame 4 and gas exchange membrane 5 are moved into the treatment tank 1, the swing mechanism moves synchronously with the installation frame 4 under the limiting action of the limiting mechanism. The support mechanism can support the installation frame 4. When the installation frame 4 moves to the position of the support mechanism, the swing mechanism squeezes the elastic telescopic member 20, so that the elastic telescopic member 20 is in a compressed energy storage state. Subsequently, during the operation of the purification equipment, the microalgae reaction chamber above the gas exchange membrane 5 receives ample external sunlight, ensuring that the microalgae can exert maximum efficiency. The microalgae absorb nutrients such as nitrogen and phosphorus from the wastewater through photosynthesis and produce oxygen, increasing the oxygen content in the wastewater. Some of this oxygen can pass through the gas exchange membrane 5 into the microbial reaction chamber below, providing oxygen for the microorganisms. The treated wastewater in the microalgae reaction chamber flows through the filter screen 7 to the microbial reaction chamber. The filter screen 7 blocks the microalgae, while the water flow transports dissolved oxygen to the microbial reaction chamber. When the water in the bioreactor flows to the drain pipe 3, it passes through the mud-water separation membrane 2. The mud-water separation membrane 2 separates the purified water from the microorganisms, allowing the purified water to be discharged through the drain pipe 3. The carbon dioxide produced in the microbial reactor during wastewater treatment moves upward and passes through the gas exchange membrane 5 to the microalgae reactor, where it is absorbed by the microalgae. This ensures the absorption and purification of carbon dioxide, reducing carbon dioxide emissions. The microalgae and microorganisms can provide each other with oxygen and carbon dioxide, and the microorganisms and microalgae do not affect each other, maintaining the best coupling state and ensuring the efficiency of wastewater treatment. After the wastewater treatment is completed, the water in treatment tank 1 is discharged. Microalgae adhere to the surface of gas exchange membrane 5 and filter screen 7. Before lifting the installation frame 4 and gas exchange membrane 5 upward, the limiting mechanism is first used to release the limit on the swing mechanism. The elastic telescopic component 20 extends and releases elastic potential energy to lift the swing mechanism and filter screen 7 upward, exposing the position of the installed filter screen 7. When the installation frame 4 and gas exchange membrane 5 are subsequently lifted upward, the airflow can quickly flow to the bottom of the installation frame 4. The airflow exchange rate between the upper and lower parts of the installation frame 4 and gas exchange membrane 5 is accelerated, and the pressure difference is reduced, so that the installation frame 4 and gas exchange membrane 5 can be lifted smoothly and quickly. This avoids the airflow being unable to flow quickly to the bottom of the installation frame 4 and gas exchange membrane 5, which would cause the airflow to form greater resistance when the installation frame 4 and gas exchange membrane 5 move upward, affecting the movement of the installation frame 4 and gas exchange membrane 5. Moreover, the airflow can quickly flow to the bottom of the installation frame 4 and gas exchange membrane 5, which can keep the installation frame 4 stable and reduce the swaying amplitude when the installation frame 4 moves.

[0021] As a further embodiment of the present invention, the support mechanism includes a support frame 9, which is fixedly connected to the inner wall surface of the treatment pool 1, the mounting frame 4 is located above the support frame 9, and the elastic telescopic member 20 is fixedly connected to the inner surface of the support frame 9. The support frame 9 can support the mounting frame 4, so that the mounting frame 4 can be stably placed in the treatment pool 1. When the mounting frame 4 moves to the surface of the support frame 9, the swing mechanism can move above the elastic telescopic member 20 and squeeze it.

[0022] As a further embodiment of the present invention, the swing mechanism includes a fixed frame 6 fixedly connected to the inner side of the mounting frame 4, and a swing frame 19 is provided on the inner side of the fixed frame 6 through a rotating column 10. The filter screen 7 is installed in the swing frame 19, and the swing frame 19 can drive the filter screen 7 to swing. The elastic telescopic member 20 is located below the swing frame 19. During the process of the installation frame 4 moving into the treatment tank 1 to the position of the support frame 9, the swing frame 19 is limited by the limiting mechanism and moves synchronously with the installation frame 4. When the swing frame 19 moves downward to the surface of the support frame 9, it can squeeze the elastic telescopic member 20, and the filter screen 7 can filter the water flow normally. When it is necessary to remove the installation frame 4, the limiting mechanism releases the limitation on the swing frame 19, and the elastic telescopic member 20 bounces the swing frame 19 upward, so that the filter screen 7 flips upward with the swing frame 19, thereby allowing the air to circulate quickly and reducing the wind resistance encountered by the installation frame 4 when it moves.

[0023] As a further embodiment of the present invention, the limiting mechanism includes a positioning block 22 provided in the groove 21 on the inner surface of the mounting frame 4 corresponding to the position of the swing frame 19, and the positioning block 22 extends to the outside of the groove 21 to limit the swing frame 19. The positioning block 22 can limit the swing frame 19, so that the swing frame 19 and the mounting frame 4 remain stable. When the positioning block 22 is pushed into the groove 21, the positioning block 22 can be moved out of the top of the swing frame 19 to release the limitation on the swing frame 19.

[0024] During the sewage treatment process, the mounting frame 4 is prone to undulation under the action of water flow and cannot keep in close contact with the support frame 9. As a further solution of the present invention, an L-shaped through groove 16 is provided on the inner wall surface of the treatment tank 1 and extends to its top. A limiting block 17 with an inclined end is elastically slidably connected in the through groove 16. The limiting block 17 is used to limit the mounting frame 4. During the process of moving the mounting frame 4 and the gas exchange membrane 5 to the surface of the support frame 9, after the mounting frame 4 moves above the limiting block 17, it can squeeze the limiting block 17 and pass over the limiting block 17. The limiting block 17 can limit the mounting frame 4 to keep it in close contact with the support frame 9, so as to prevent the mounting frame 4 from undulating and shaking under the action of water flow when sewage is added, which would cause the mounting frame 4 to fail to fit with the support frame 9 and affect the sewage separation effect.

[0025] When the installation frame 4 needs to be removed after the sewage treatment is completed, the installation frame 4 is limited by the limiting block 17 in the treatment tank 1. It is necessary to first release the positioning block 22 from the limiting frame 19 and then release the limiting block 17 from the limiting frame 4. This is not convenient to operate. As a further solution of the present invention, a release rod 18 with a sloping bottom is slidably connected in the through groove 16. The upper end of the limiting block 17 is sloping. When the release rod 18 moves downward, it can squeeze the limiting block 17 into the through groove 16. A plurality of retractable first elastic elements 11 are provided between the side of the positioning block 22 and the inner wall of the groove 21. The first elastic elements 11 are used to provide elastic force to the positioning block 22 to reset it. The upper end of the positioning block 22 is provided with a sloping surface. The bottom of the limiting block 17 is provided with a protrusion 23. The protrusion 23 is used to drive the positioning block 22 into the groove 21 when the limiting block 17 moves into the through groove 16. After the water in the microalgae reaction chamber is discharged after the wastewater treatment is completed, the release lever 18 is pressed down, and the bottom of the release lever 18 presses the limiting block 17 into the through groove 16. The protrusion 23 moves synchronously with the limiting block 17. The movement of the protrusion 23 can drive the positioning block 22 into the groove 21. At this time, the positioning block 22 limits the swing frame 19. Under the pushing action of the swing frame 19, the upper end of the positioning block 22 is attached to the upper part of the inner wall of the groove 21. Then, after the positioning block 22 moves out of the upper part of the swing frame 19 and releases its limitation, the swing frame 19 can be bounced up under the elastic force of the elastic telescopic member 20. The positioning block 22 moves towards the bottom of the groove 21 under the squeezing action of the protrusion 23. The first elastic element 11 is compressed, and the protrusion 23 can pass over the positioning block 22. Then the limiting block 17 continues to move to release the limitation on the mounting frame 4, and the mounting frame 4 can be taken out smoothly, simplifying the removal operation of the mounting frame 4.

[0026] During the process of removing the installation frame 4 after the sewage treatment is completed, the filter screen 7 always connects the microalgae reaction chamber and the microbial reaction chamber, which can easily cause sewage that has not been thoroughly treated by microalgae to flow into the microbial reaction chamber, resulting in incomplete sewage treatment. As a further solution of the present invention, a sealing plate 8 is elastically hinged to the inner side of the installation frame 4 corresponding to the bottom of the fixed frame 6. The sealing plate 8 is used to seal the bottom of the fixed frame 6 and the filter screen 7. The sealing plate 8 and the bottom of the fixed frame 6 are magnetically attached. The elastic telescopic member 20 passes through the sealing plate 8, and the part of the sealing plate 8 corresponding to the elastic telescopic member 20 can extend and retract. The sealing plate 8 is constructed to be able to flip down and open when a negative pressure is formed in the microbial reaction chamber. When the treated water in treatment tank 1 is discharged through drain pipe 3, the water in the microbial reaction chamber is gradually discharged. The sealing plate 8 seals the bottom of the fixing frame 6 and the filter screen 7, while the gas exchange membrane 5 blocks the water flow above, creating a negative pressure in the microbial reaction chamber. Under the action of the negative pressure, the sealing plate 8 flips downward, exposing the fixing frame 6 and the filter screen 7. The water can be filtered through the filter screen 7 and then flow into the microbial reaction chamber. By temporarily sealing the bottom of the filter screen 7 with the sealing plate 8, the discharge of sewage in the microalgae reaction chamber can be delayed, increasing its treatment time inside the microalgae reaction chamber and ensuring the treatment effect of the sewage. During the process of removing the installation frame 4, the sealing plate 8 can be opened under the action of airflow.

[0027] During the wastewater treatment process, when the wastewater passes through the filter screen 7, microalgae easily adhere to the surface of the filter screen 7, affecting the filtration effect. As a further solution of the present invention, the fixed frame 6 is provided with a sliding groove 12 corresponding to the position of the rotating column 10. A retractable second elastic block 13 is fixedly connected in the sliding groove 12. The upper end of the second elastic block 13 is slidably connected to the surface of the rotating column 10. An extension block 14 is slidably connected to the bottom of the swing frame 19. The upper end of the elastic telescopic member 20 is provided with an inclined surface. The extension block 14 is located between the upper inclined surface of the elastic telescopic member 20 and the mounting frame 4. When the rotating column 10 moves downward, the extension block 14 can maintain its fit with the upper end of the elastic telescopic member 20. When the mounting frame 4 is installed inside the treatment tank 1, the extension block 14 is located between the upper inclined surface of the elastic telescopic member 20 and the mounting frame 4. The elastic telescopic member 20 is squeezed and contracted. Subsequently, when the wastewater treated in the microalgae reaction chamber flows through the filter screen 7 into the microbial reaction chamber, the swing frame 19 and the filter screen 7 near the rotating column 10 move downward along the slide 12 under the action of the water flow. The second elastic block 13 is compressed, so that the swing frame 19 and the filter screen 7 are in an inclined state. When filtering the water flow, the microalgae can gather at the lowest point of the inclined filter screen 7, thereby avoiding the filter screen 7 surface being completely covered by microalgae, which would prevent the water flow from being filtered and thus affect the continuous treatment of the water flow.

[0028] During the wastewater treatment process, water and microalgae can easily flow into the microbial reaction chamber through the gap between the mounting frame 4 and the support frame 9. As a further embodiment of the present invention, a sealing strip 24 with a triangular cross section is fixedly connected to the bottom of the mounting frame 4, and a sealing groove 25 is opened on the surface of the support frame 9. When the mounting frame 4 moves to the position of the support frame 9, the sealing strip 24 can move into the sealing groove 25 to seal the gap between the mounting frame 4 and the support frame 9. The mounting frame 4 and the support frame 9 can fit tightly together under the action of the limiting block 17 and water pressure to ensure the sealing between the mounting frame 4 and the support frame 9.

[0029] During the process of treating and purifying wastewater, when there are many microalgae in the microalgae reaction chamber, the accumulation of many microalgae on the surface of the gas exchange membrane 5 and the filter screen 7 will affect the normal use of the gas exchange membrane 5 and the filter screen 7. As a further solution of the present invention, a barrier plate 26 is fixedly connected to the surface of the mounting frame 4. The surface of the barrier plate 26 has multiple equidistant air vents 27, and the cross-section of the air vents 27 is a trapezoid with a wider bottom and a narrower top. During the wastewater treatment and purification process, the barrier plate 26 can hold some microalgae, preventing them from settling directly onto the surface of the gas exchange membrane 5 and the filter screen 7. The vent 27, which is wider at the bottom and narrower at the top, allows carbon dioxide passing through the gas exchange membrane 5 to pass through, ensuring that carbon dioxide can pass through the vent 27 and come into contact with the microalgae.

Claims

1. A microalgae membrane biocoupled wastewater purification device, comprising a treatment tank (1), a sludge-water separation membrane (2), and a drain pipe (3) located below the sludge-water separation membrane (2); characterized in that: The treatment tank (1) is equipped with an installation frame (4) through a support mechanism. A gas exchange membrane (5) is fixedly connected to the inside of the installation frame (4). The gas exchange membrane (5) allows gas to pass through but blocks liquid. The installation frame (4) and the gas exchange membrane (5) divide the treatment tank (1) into an upper microalgae reaction chamber and a lower microbial reaction chamber. A filter screen (7) is provided on the inner surface of the installation frame (4) through a swing mechanism. The swing mechanism is used to drive the filter screen (7) to move. The filter screen (7) is used to filter the microalgae in the sewage above the gas exchange membrane (5). The surface of the installation frame is provided with a limiting mechanism for limiting the swing mechanism. The support mechanism is provided with an elastic telescopic member (20) below the swing mechanism. The elastic telescopic member (20) is used to bounce the swing mechanism upward when the limiting mechanism releases the limiting mechanism. The swing mechanism includes a fixed frame (6) fixedly connected to the inside of the mounting frame (4), and a swing frame (19) is provided inside the fixed frame (6) via a rotating column (10). The filter screen (7) is installed inside the swing frame (19), and the swing frame (19) can drive the filter screen (7) to swing. The elastic telescopic member (20) is located below the swing frame (19). The limiting mechanism includes a positioning block (22) provided in the groove (21) on the inner surface of the mounting frame (4) corresponding to the position of the swing frame (19). The positioning block (22) extends to the outside of the groove (21) to limit the swing frame (19). The inner wall surface of the treatment pool (1) is provided with an L-shaped through groove (16) that extends to its top. A limiting block (17) with an inclined end is elastically slidably connected in the through groove (16). The limiting block (17) is used to limit the installation frame (4). A release rod (18) with a sloping bottom is slidably connected in the through groove (16). The upper end of the limiting block (17) is sloping. When the release rod (18) moves downward, it can squeeze the limiting block (17) to move into the through groove (16). Multiple sides of the positioning block (22) are provided with a retractable first elastic element (11) between them and the inner wall of the groove (21). The first elastic element (11) is used to provide elastic force to the positioning block (22) to reset it. The upper end of the positioning block (22) is provided with a sloping surface. The bottom of the limiting block (17) is provided with a protrusion (23). The protrusion (23) is used to drive the positioning block (22) to move into the groove (21) when the limiting block (17) moves into the through groove (16).

2. The microalgae membrane biocoupled wastewater purification device according to claim 1, characterized in that: The support mechanism includes a support frame (9), which is fixedly connected to the inner wall surface of the treatment pool (1), the mounting frame (4) is located above the support frame (9), and the elastic telescopic member (20) is fixedly connected to the inner surface of the support frame (9).

3. The microalgae membrane biocoupled wastewater purification device according to claim 1, characterized in that: The mounting frame (4) is elastically hinged to the bottom of the fixed frame (6) below. The sealing plate (8) is used to seal the bottom of the fixed frame (6) and the filter screen (7). The sealing plate (8) and the bottom of the fixed frame (6) are magnetically attached. The elastic telescopic member (20) passes through the sealing plate (8), and the part of the sealing plate (8) corresponding to the elastic telescopic member (20) can extend and retract. The sealing plate (8) is constructed to be able to flip down and open when a negative pressure is formed in the microbial reaction chamber.

4. The microalgae membrane biocoupled wastewater purification device according to claim 1, characterized in that: The fixed frame (6) has a groove (12) at the position corresponding to the rotating column (10). A retractable second elastic block (13) is fixedly connected in the groove (12). The upper end of the second elastic block (13) is slidably connected to the surface of the rotating column (10). An extension block (14) is slidably connected to the bottom of the swing frame (19). The upper end of the elastic telescopic member (20) has an inclined surface. The extension block (14) is located between the upper inclined surface of the elastic telescopic member (20) and the mounting frame (4). When the rotating column (10) moves downward, the extension block (14) can maintain its contact with the upper end of the elastic telescopic member (20).

5. The microalgae membrane biocoupled wastewater purification device according to claim 2, characterized in that: The bottom of the mounting frame (4) is fixedly connected to a sealing strip (24) with a triangular cross section, and the surface of the support frame (9) is provided with a sealing groove (25).

6. The microalgae membrane biocoupled wastewater purification device according to claim 1, characterized in that: The mounting frame (4) is fixedly connected to a barrier plate (26), and the barrier plate (26) has multiple equidistant air vents (27) on its surface. The air vents (27) have a cross-section that is wider at the bottom and narrower at the top.

Images