Sewage treatment device with rotatable membrane component

Abstract

The sewage treatment device comprises a pool body and a plurality of membrane assemblies evenly distributed in the pool body, each membrane assembly comprises an inner frame set, an outer frame and a plurality of membrane pipes, the inner frame set comprises an inner upper frame on the upper portion and an inner lower frame on the lower portion, and the inner upper frame, the inner lower frame and the outer frame are all in a horizontal spiral shape; the upper and lower structures are correspondingly consistent; microorganisms are loaded on the outer surfaces of the membrane tubes, the tops of the membrane tubes are slidably connected with an inner upper frame, and the bottoms of the membrane tubes are slidably connected with an inner lower frame, so that the membrane tubes can move along the inner frame group, and different membrane tubes can be in contact with sewage at different positions of the membrane assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment device with a rotatable membrane component. Background Art

[0002] Membrane components are a commonly used microbial load carrier. Generally, membrane materials have a large specific surface area and can provide a large load area. Membrane materials have the advantages of air permeability, stable and reliable material, and good toughness. They can provide a large amount of stable and reliable load space for microorganisms, and the pores of membrane materials can also provide oxygen for the microorganisms loaded on the membrane. At present, membrane materials and membrane components used as load materials generally adopt traditional forms. For example, membrane materials are formed into curtains one by one, and then assembled into a cube. The outside of the cube is fixed by a frame to form a shape, similar to the traditional beehive model. In this form of membrane component, there are more membrane materials loaded, the load area is larger, and the biomass is larger. However, the cubic form of the module has disadvantages: the microorganisms loaded on the outside are in contact with more sewage, and the microorganisms inside are in contact with less sewage, resulting in a large pollution load on the outside and a small pollution load on the inside. The lack of nutrients for the microorganisms inside will seriously affect their metabolic activities, causing them to die and fall off. Finally, the biomass of the entire membrane component is unevenly distributed, affecting the sewage treatment effect. Summary of the invention

[0003] In view of the above problems, the present invention provides a sewage treatment device with a rotatable membrane assembly, including a pool body and a plurality of membrane assemblies evenly distributed inside the pool body, the membrane assembly including an inner frame group, an outer frame and a plurality of membrane tubes, the inner frame group including an upper inner frame and a lower inner frame, the inner upper frame, the inner lower frame and the outer frame are all horizontally spiral, and the upper and lower structures correspond to each other; the outer surface of the membrane tube is loaded with microorganisms, the top of the membrane tube is slidably connected to the inner upper frame, and the bottom of the membrane tube is slidably connected to the inner lower frame, so that the membrane tube can move along the inner frame group, so that different membrane tubes can contact sewage at different positions of the membrane assembly.

[0004] Optionally, the inner upper frame includes a first spiral track and a second spiral track that are horizontally arranged, the first spiral track and the second spiral track are arranged side by side and are both spirally wound around the center of the inner upper frame;

[0005] The first spiral track has a starting point at the center of the inner upper frame, and then spirals outward in a clockwise or counterclockwise direction, with the end of the first spiral track close to the outer side of the inner upper frame;

[0006] The second spiral track is located as a whole on the outside of the first spiral track, and the distance between the first spiral track and the second spiral track remains unchanged. The starting end of the second spiral track is connected to the starting end of the first spiral track through a circular arc track, and then the second spiral track spirals outward in the same direction as the first spiral track. The end of the second spiral track is located on the outer side of the inner upper frame, and the end of the first spiral track is connected to the end of the second spiral track through a circular arc track.

[0007] Optionally, the inner lower frame includes a third spiral track and a fourth spiral track which are arranged horizontally, the third spiral track and the fourth spiral track are arranged side by side and are spirally wound together with the center of the inner lower frame as the center;

[0008] The starting end of the third spiral track is located at the center of the inner lower frame, and then spirals outward in a clockwise or counterclockwise direction, and the end of the third spiral track is close to the outer side of the inner lower frame;

[0009] The fourth spiral track is located entirely outside the third spiral track, and the distance between the third spiral track and the fourth spiral track remains unchanged. The starting end of the fourth spiral track is connected to the starting end of the third spiral track through a circular arc track, and then the fourth spiral track spirals outward in the same direction as the third spiral track. The end of the fourth spiral track is located on the outer side of the inner lower frame, and the end of the third spiral track is connected to the end of the fourth spiral track through a circular arc track.

[0010] Further optionally, the top ends of one or more membrane tubes are connected to the first spiral track via an upper slider, and can move in a circular motion along the first spiral track and the second spiral track; the bottom ends of one or more membrane tubes are connected to the third spiral track via a lower slider, and can move in a circular motion along the third spiral track and the fourth spiral track; the number of upper sliders is equal to that of lower sliders.

[0011] Further optionally, the interior of the upper slider is hollow, and a plurality of membrane interfaces 1 are provided at the bottom of the upper slider, the number of which is equal to the number of membrane tubes connected to the upper slider, each membrane interface 1 is connected to the top of a membrane tube, and an upper interface is provided at the top of the upper slider;

[0012] The interior of the lower slider is hollow, and a plurality of membrane interfaces 2 are provided on the top of the lower slider, the number of which is equal to the number of membrane tubes connected to the lower slider, each membrane interface 2 is connected to the bottom end of a membrane tube, and a lower interface is provided at the bottom of the lower slider.

[0013] Further optionally, an exhaust pipe is provided on the inner upper frame, and the exhaust pipe is coiled along the upper surfaces of the first spiral track and the second spiral track. A plurality of exhaust interfaces are provided at the bottom of the exhaust pipe, and the exhaust interfaces are connected one by one with the upper interfaces of the upper slider, so that the gas exhausted from the membrane tube is discharged into the exhaust pipe through the upper slider.

[0014] Further optionally, an air intake pipe is provided on the inner lower frame, and the air intake pipe is coiled along the lower surfaces of the third spiral track and the fourth spiral track. A plurality of air intake interfaces are provided at the bottom of the air intake pipe, and the air intake interfaces are connected one by one with the lower interfaces of the lower slider, so that the gas input by the air intake pipe is discharged into the membrane tube through the lower slider.

[0015] Optionally, the membrane assembly further comprises a plurality of vertically arranged traction rods, the traction rods passing through the inner lower frame and the inner upper frame, and one traction rod is detachably connected to an upper slider and a lower slider;

[0016] The top of the traction rod passes through the water surface of the pool body and is connected to the top slider on the outer frame. The top slider drives the upper slider and the lower slider to move through the traction rod, thereby driving the membrane tube to move.

[0017] Optionally, the outer frame is arranged above the liquid surface of the pool body, and the outer frame includes a fifth spiral track and a sixth spiral track arranged horizontally, the fifth spiral track and the sixth spiral track are arranged side by side, and both are spirally wound together with the center of the outer frame as the center; the outer frame is concentrically arranged with the inner frame;

[0018] The starting end of the fifth spiral track is at the center of the outer frame, and then spirals outward in a clockwise or counterclockwise direction, and the end of the fifth spiral track is close to the outer side of the outer frame;

[0019] The sixth spiral track is located outside the fifth spiral track as a whole, the distance between the fifth spiral track and the sixth spiral track remains unchanged, the beginning of the sixth spiral track is connected to the beginning of the fifth spiral track through a circular arc track, and then the sixth spiral track spirals outward in the same direction as the fifth spiral track, the end of the sixth spiral track is located on the outer side of the outer frame, and the end of the fifth spiral track is connected to the end of the sixth spiral track through a circular arc track. The upper and lower structures of the first spiral track and the fifth spiral track correspond to each other, and the upper and lower structures of the second spiral track and the sixth spiral track correspond to each other.

[0020] Optionally, the outer side of the inner upper frame is connected to a plurality of connecting rods, which are evenly arranged along the circumference of the inner upper frame. The connecting rods are vertically arranged and the bottom ends are connected to the outer side of the inner lower frame, and the upper parts of the connecting rods are connected to the outer side of the outer frame. The tops of the connecting rods are higher than the outer frame and are connected in parallel to the rotating shaft of the motor. The motor is arranged above the outer frame and is used to drive the entire membrane assembly to rotate through the connecting rods.

[0021] Optionally, the traction rod is hollow, and both the top and bottom ends are open to prevent sludge from accumulating inside the traction rod; the bottom of the traction rod exceeds the inner lower frame and extends to the lower part of the tank body, and the part of the traction rod below the inner lower frame is called a stirring part, and a hollow strip is provided on one side of the stirring part, and the length of the hollow strip is slightly smaller than the length of the stirring part;

[0022] A lifting rod is arranged inside the traction rod, and a stirring paddle is arranged at the bottom of the lifting rod. The stirring paddle can be moved up and down by controlling the lifting rod to rise and fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the membrane assembly (for the sake of clarity, the top / upper / lower sliders and exhaust / inlet pipes are omitted);

[0024] Figure 2 This is a schematic diagram of the inner upper frame (the upper slider and exhaust pipe are omitted);

[0025] Figure 3 It is a schematic diagram of the connection between the membrane tube and the upper slider and the lower slider;

[0026] Figure 4 Schematic diagram of the traction rod connecting the outer frame, the inner upper frame and the inner lower frame.

[0027] In the accompanying drawings, 1- agitator, 2- membrane assembly, 3- outer frame, 4- membrane tube, 5- inner upper frame, 6- inner lower frame, 7- first spiral track, 8- second spiral track, 9- third spiral track, 10- fourth spiral track, 11- fifth spiral track, 12- sixth spiral track, 13- upper slider, 14- lower slider, 15- top slider, 16- membrane interface one, 17- upper interface, 18- membrane interface two, 19- lower interface, 20- exhaust pipe, 21- inlet pipe, 22- traction rod, 23- hollow bar, 24- lifting rod, 25- connecting rod. DETAILED DESCRIPTION

[0028] This embodiment provides a sewage treatment device with a rotatable membrane assembly, such as Figure 1-Figure 4 As shown, it includes a pool body and several membrane modules 2 evenly distributed inside the pool body, the membrane module 2 includes an inner frame group, an outer frame 3 and several membrane tubes 4, the inner frame group includes an upper inner frame 5 and a lower inner frame 6, the inner upper frame 5, the inner lower frame 6 and the outer frame 3 are all horizontal spirals, and the upper and lower structures correspond to each other; the outer surface of the membrane tube 4 is loaded with microorganisms, the top of the membrane tube 4 is slidably connected to the inner upper frame 5, and the bottom of the membrane tube is slidably connected to the inner lower frame 6, so that the membrane tube can move along the inner frame group, so that different membrane tubes can contact sewage at different positions of the membrane module.

[0029] The material of the membrane tube is determined according to the requirements of sewage treatment, for example, heavy ion microporous membrane, PVDF hollow fiber membrane, PDMS hollow fiber membrane is used.

[0030] Optionally, the inner upper frame 5 includes a first spiral track 7 and a second spiral track 8 arranged horizontally, the first spiral track 7 and the second spiral track 8 are arranged side by side, and both are spirally wound together with the center of the inner upper frame 5 as the center;

[0031] The first spiral track 7 starts at the center of the inner upper frame 5 and then spirals outward in a clockwise or counterclockwise direction, and the end of the first spiral track 7 is close to the outer side of the inner upper frame 5;

[0032] The second spiral track 8 is entirely located outside the first spiral track 7, and the distance between the first spiral track 7 and the second spiral track 8 remains unchanged. The starting end of the second spiral track 8 is connected to the starting end of the first spiral track 7 through a circular arc track, and then the second spiral track 8 spirals outward in the same direction as the first spiral track 7. The end of the second spiral track 8 is located on the outer side of the inner upper frame 5, and the end of the first spiral track 7 is connected to the end of the second spiral track 8 through a circular arc track.

[0033] Optionally, the inner lower frame 6 includes a third spiral track 9 and a fourth spiral track 10 which are arranged horizontally, and the third spiral track 9 and the fourth spiral track 10 are arranged side by side and are spirally wound together with the center of the inner lower frame 6 as the center;

[0034] The starting end of the third spiral track 9 is located at the center of the inner lower frame 6, and then spirally winds outward in a clockwise or counterclockwise direction, and the end of the third spiral track 9 is close to the outer side of the inner lower frame 6;

[0035] The fourth spiral track 10 is located outside the third spiral track 9 as a whole, and the distance between the third spiral track 9 and the fourth spiral track 10 remains unchanged. The beginning of the fourth spiral track 10 is connected to the beginning of the third spiral track 9 through a circular arc track, and then the fourth spiral track 10 spirals outward in the same direction as the third spiral track 9. The end of the fourth spiral track 10 is located on the outer side of the inner lower frame 6, and the end of the third spiral track 9 is connected to the end of the fourth spiral track 10 through a circular arc track. The first spiral track 7 corresponds to the third spiral track 9 in upper and lower structures, and the second spiral track 8 corresponds to the fourth spiral track 10 in upper and lower structures.

[0036] Further optionally, the membrane tubes 4 on the membrane assembly are all vertically arranged and arranged along the first spiral track 7 and the second spiral track 8, and any adjacent membrane tubes do not overlap or intersect each other;

[0037] The top ends of one or more membrane tubes 4 are connected to the first spiral track 7 via an upper slider 13, and can move in a circular motion along the first spiral track 7 and the second spiral track 8; the bottom ends of one or more membrane tubes are connected to the third spiral track 9 via a lower slider 14, and can move in a circular motion along the third spiral track 9 and the fourth spiral track 10; the number of upper sliders 13 and lower sliders 14 is equal.

[0038] Further optionally, the interior of the upper slider 13 is hollow, and a plurality of membrane interfaces 16 are provided at the bottom of the upper slider 13, the number of membrane interfaces 16 being equal to the number of membrane tubes connected to the upper slider 13, each membrane interface 16 being connected to the top of a membrane tube, and an upper interface 17 is provided at the top of the upper slider 13;

[0039] The interior of the lower slider 14 is hollow, and a plurality of membrane interfaces 18 are provided on the top of the lower slider 14 . The number of membrane interfaces 18 is equal to the number of membrane tubes connected to the lower slider 14 . Each membrane interface 18 is connected to the bottom end of a membrane tube, and a lower interface 19 is provided at the bottom of the lower slider 14 .

[0040] Further optionally, an exhaust pipe 20 is provided on the inner upper frame 5, and the exhaust pipe 20 is coiled along the upper surfaces of the first spiral track 7 and the second spiral track 8. The coiling structure of the exhaust pipe 20 corresponds to the structure of the first spiral track 7 and the second spiral track 8, and the exhaust pipe 20 forms a closed loop, that is, it is not disconnected at the beginning and end of the first spiral track 7;

[0041] A plurality of exhaust interfaces are provided at the bottom of the exhaust pipe 20, which are connected one by one with the upper interface 17 of the upper slider 13, so that the gas discharged from the membrane tube is discharged into the exhaust pipe 20 through the upper slider 13; any position of the exhaust pipe 20 is connected to the air pipe and extended to the water surface for exhaust.

[0042] Further optionally, an air intake pipe 21 is provided on the inner lower frame 6, and the air intake pipe 21 is coiled along the lower surface of the third spiral track 9 and the fourth spiral track 10. The coiling structure of the air intake pipe 21 corresponds to the structure of the third spiral track 9 and the fourth spiral track 10, and the air intake pipe 21 forms a closed loop, that is, it is not disconnected at the beginning and end of the third spiral track 9;

[0043] A plurality of air inlet interfaces are provided at the bottom of the air inlet pipe 21, which are connected one by one with the lower interface 19 of the lower slider 14, so that the gas input by the air inlet pipe 21 is discharged into the membrane tube through the lower slider 14; any position of the air inlet pipe 21 is connected to the air pipe and extends to the water surface to input gas.

[0044] Optionally, the membrane assembly 2 further comprises a plurality of vertically arranged traction rods 22, the traction rods 22 passing through the inner lower frame 6 and the inner upper frame 5, one traction rod 22 detachably connects an upper slider 13 and a lower slider 14, and the number of the traction rods 22 does not exceed the number of the upper sliders 13;

[0045] The top of the traction rod 22 passes through the water surface of the pool body and is connected to the top slider 15 on the outer frame 3. The top slider 15 drives the upper slider 13 and the lower slider 14 to move through the traction rod 22, thereby driving the membrane tube to move.

[0046] Further optionally, a plurality of upper sliders 13 are connected in series by a thin rope, for example, 2-5 upper sliders 13 are connected in series by a thin rope, and the spacing between adjacent upper sliders 13 must meet the requirement of uniform arrangement of the membrane tubes; the upper slider 13 at the head of the string is connected to a traction rod 22, and the traction rod 22 can drive the upper sliders 13 of the string to move along the inner upper frame 5;

[0047] Several lower sliders 14 are connected in series by thin ropes. For example, 2-5 lower sliders 13 are connected in series by a thin rope. The spacing between adjacent lower sliders 14 must meet the requirement of uniform arrangement of the membrane tubes. The lower slider 14 at the head of the string is connected to a traction rod 22, which can drive the lower sliders 14 of the string to move along the inner lower frame 6.

[0048] Since the traction rod 22 is vertically arranged, a string of upper sliders 13 and a string of lower sliders 14 should correspond to each other in terms of quantity and position relationship.

[0049] Optionally, the outer frame 3 is arranged above the liquid surface of the pool body, and the outer frame 3 includes a fifth spiral track 11 and a sixth spiral track 12 arranged horizontally, the fifth spiral track 11 and the sixth spiral track 12 are arranged side by side, and both are spirally wound together with the center of the outer frame 3 as the center; the outer frame 3 is concentrically arranged with the inner frame;

[0050] The starting end of the fifth spiral track 11 is at the center of the outer frame 3, and then spirals outward in a clockwise or counterclockwise direction, and the end of the fifth spiral track 11 is close to the outer side of the outer frame 3;

[0051] The sixth spiral track 12 is located outside the fifth spiral track 11 as a whole, and the distance between the fifth spiral track 11 and the sixth spiral track 12 remains unchanged. The beginning of the sixth spiral track 12 is connected to the beginning of the fifth spiral track 11 through a circular arc track, and then the sixth spiral track 12 spirals outward in the same direction as the fifth spiral track 11. The end of the sixth spiral track 12 is located on the outer side of the outer frame 3, and the end of the fifth spiral track 11 is connected to the end of the sixth spiral track 12 through a circular arc track. The first spiral track 7 corresponds to the fifth spiral track 11 in upper and lower structures, and the second spiral track 8 corresponds to the sixth spiral track 12 in upper and lower structures.

[0052] Further optionally, the traction rod 22 is slidably connected to the fifth spiral track 11 and the sixth spiral track 12 through the top slider 15, the traction rod 22 is connected to the top slider 15, and the connection and driving form of the top slider 15 and the outer frame 3 is the existing technology, which is not limited by the present invention.

[0053] When in use, the top slider 15 drives the corresponding upper slider 13 and lower slider 14 to move along the inner upper frame 5 and the inner lower frame 6 through the traction rod 22. For example, a membrane tube is initially located at the outermost side of the membrane assembly (the ends of the first spiral track 7 and the third spiral track 9). The upper slider 13 and the lower slider 14 connected to the membrane tube are driven by the corresponding traction rod 22 (the traction rod 22 is driven by the corresponding top slider 15), and move spirally along the first spiral track 7 and the third spiral track 9 toward the inside of the membrane assembly, always keeping the membrane tube vertical.

[0054] When the membrane tube moves to the center of the membrane assembly, the top slider 15 moves from the starting end of the fifth spiral track 11 to the starting end of the sixth spiral track 12 through the arc track of the outer frame 3, and accordingly, the upper slider 13 moves from the starting end of the first spiral track 7 to the starting end of the second spiral track 8 through the arc track of the inner upper frame 5, and the lower slider 14 moves from the starting end of the third spiral track 9 to the starting end of the fourth spiral track 10 through the arc track of the inner lower frame 6, and then the traction rod 22 moves along the sixth spiral track 12, and the membrane tube moves along the second spiral track 8 (fourth spiral track 10) again.

[0055] When the membrane tube moves to the outermost side of the membrane assembly, the top slider 15 moves from the end of the sixth spiral track 12 to the end of the fifth spiral track 11 through the circular arc track of the outer frame 3, and accordingly, the upper slider 13 moves from the end of the second spiral track 8 to the end of the first spiral track 7 through the circular arc track of the inner upper frame 5, and the lower slider 14 moves from the end of the fourth spiral track 10 to the end of the third spiral track 9 through the circular arc track of the inner lower frame 6, and then the traction rod 22 moves along the fifth spiral track 11, and the membrane tube continues to move toward the center of the circle along the first spiral track 7 (third spiral track 9).

[0056] All membrane tubes are moved from the outside to the center of the circle and then from the center to the outside along the track in the above manner, repeating the cycle. This allows each membrane tube to pass through various positions of the membrane assembly, and the contact conditions between the membrane tubes and sewage will continue to change, making the microbial load on the outer sides of all membrane tubes tend to be uniform, thereby stabilizing the treatment conditions and effluent quality.

[0057] Optionally, the outer side of the inner upper frame 5 is connected to a plurality of connecting rods 25, and the plurality of connecting rods 25 are evenly arranged along the circumference of the inner upper frame 5. The connecting rods 25 are vertically arranged and the bottom ends are connected to the outer side of the inner lower frame 6, and the upper parts of the connecting rods 25 are connected to the outer side of the outer frame 3; the tops of the connecting rods 25 are higher than the outer frame 3 and are connected in parallel to the rotating shaft of the motor. The motor is arranged above the outer frame 3, and is used to drive the entire membrane assembly to rotate through the connecting rods 25.

[0058] Since the membrane assembly is spiral-shaped, there is an opening on the outer side of the membrane assembly, the top of which corresponds to the end of the inner upper frame 5, and the bottom corresponds to the end of the inner lower frame 6. The rotation direction from the center of the membrane assembly along the inner upper frame 5 (inner lower frame 6) toward the outside of the membrane assembly is the fixed spiral direction of the membrane assembly. By controlling the membrane assembly to rotate along its fixed spiral direction through the motor and the connecting rod 25, sewage can be continuously poured into the membrane assembly from the above opening, which is conducive to driving the water flow and renewal inside the membrane assembly.

[0059] Optionally, the traction rod 22 is hollow, and both the top and bottom ends are open to prevent sludge from accumulating inside the traction rod 22; the bottom of the traction rod 22 exceeds the inner lower frame 6 and extends to the lower part of the tank body, and the part of the traction rod 22 below the inner lower frame 6 is called a stirring part, and a hollow strip 23 is provided on one side of the stirring part, and the length of the hollow strip 23 is slightly smaller than the length of the stirring part;

[0060] A lifting rod 24 is provided inside the traction rod 22 , and a stirring paddle 1 is provided at the bottom of the lifting rod 24 . The stirring paddle 1 can be moved up and down by controlling the lifting rod 24 to rise and fall.

[0061] Further optionally, the stirring paddle 1 is tilted, and the side of the stirring paddle 1 facing the inside of the membrane assembly is tilted upward, and the straight-line distance between the top edge of the side and the center of the membrane assembly is greater than the straight-line distance between the bottom edge and the center of the membrane assembly.

[0062] In order to improve the problem of poor sewage flow at the center of the membrane assembly, the present invention designs a stirring paddle 1 below the membrane assembly. When the traction rod 22 is on the outer surface of the membrane assembly, it will move spirally toward the inside of the membrane assembly. A hollow bar 23 is provided on the side of the traction rod 22 facing the inside of the membrane assembly. The stirring paddle 1 extends out of the traction rod 22 from the hollow bar 23 and points to the inside of the membrane assembly. Then, during the movement of the traction rod 22 toward the inside of the membrane assembly, the lifting rod 24 is pulled upward by mechanical or human action, so that the stirring paddle 1 moves upward along the hollow bar 23. The speed of the stirring paddle 1 moving upward is coordinated with the speed of the traction rod 22 moving, so that the time for the traction rod 22 to move from the outside of the membrane assembly to the center of the circle is just equal to the time for the stirring paddle 1 to rise from the bottom of the traction rod 22 to the top. As the stirring paddle 1 rises, it spirally rotates along with the traction rod 22, forming an upward spiral water flow below the membrane assembly, promoting the sewage at the bottom of the pool to enter the center of the membrane assembly along with the water flow. As the traction rod 22 can continuously move toward the center of the circle, the stirring paddle 1 can continuously disturb the water flow and continuously supply water to the center of the circle. After the water flow enters the membrane assembly, it can form a more complex water flow in conjunction with the rotation of the membrane assembly itself and the movement of the membrane tube, promoting the contact between sewage and microorganisms and improving the sewage treatment efficiency.

[0063] When the traction rod 22 passes through the center of the circle and starts to move toward the outside of the membrane assembly, the hollow bar 23 faces the outside of the membrane assembly, and the lifting rod 24 is quickly pressed down, so that the stirring paddle 1 quickly moves to the bottom of the hollow bar 23, minimizing the impact on the spiral upward water flow. The stirring paddle 1 is at the bottom of the traction rod 22, and moves outward with the traction rod 22, which can stir the sewage at the bottom of the pool body and promote the balance of water quality in the pool body.

Claims

1. A sewage treatment device having a rotatable membrane module, characterized in that: It includes a pool body and several membrane modules evenly distributed inside the pool body. The membrane modules include an inner frame group, an outer frame and several membrane tubes. The inner frame group includes an upper inner frame and a lower inner frame. The inner upper frame, the inner lower frame and the outer frame are all horizontal spirals, and the upper and lower structures correspond to each other. The outer surface of the membrane tube is loaded with microorganisms, the top of the membrane tube is slidably connected to the inner upper frame, and the bottom of the membrane tube is slidably connected to the inner lower frame, so that the membrane tube can move along the inner frame group, so that different membrane tubes can contact sewage at different positions of the membrane module.

2. The sewage treatment device with a rotatable membrane module according to claim 1, characterized in that: The inner upper frame comprises a first spiral track and a second spiral track which are arranged horizontally, the first spiral track and the second spiral track are arranged side by side and are both spirally wound around the center of the inner upper frame; The first spiral track has a starting point at the center of the inner upper frame, and then spirals outward in a clockwise or counterclockwise direction, with the end of the first spiral track close to the outer side of the inner upper frame; The second spiral track is located as a whole on the outside of the first spiral track, and the distance between the first spiral track and the second spiral track remains unchanged. The starting end of the second spiral track is connected to the starting end of the first spiral track through a circular arc track, and then the second spiral track spirals outward in the same direction as the first spiral track. The end of the second spiral track is located on the outer side of the inner upper frame, and the end of the first spiral track is connected to the end of the second spiral track through a circular arc track.

3. The sewage treatment device with a rotatable membrane module according to claim 2, characterized in that: The inner lower frame includes a third spiral track and a fourth spiral track which are arranged horizontally, the third spiral track and the fourth spiral track are arranged side by side and are spirally wound around the center of the inner lower frame; The starting end of the third spiral track is located at the center of the inner lower frame, and then spirals outward in a clockwise or counterclockwise direction, and the end of the third spiral track is close to the outer side of the inner lower frame; The fourth spiral track is located entirely outside the third spiral track, and the distance between the third spiral track and the fourth spiral track remains unchanged. The starting end of the fourth spiral track is connected to the starting end of the third spiral track through a circular arc track, and then the fourth spiral track spirals outward in the same direction as the third spiral track. The end of the fourth spiral track is located on the outer side of the inner lower frame, and the end of the third spiral track is connected to the end of the fourth spiral track through a circular arc track.

4. The sewage treatment device with a rotatable membrane module according to claim 3, characterized in that: The top ends of one or more membrane tubes are connected to the first spiral track via an upper slider, and can move in a circular motion along the first spiral track and the second spiral track; the bottom ends of one or more membrane tubes are connected to the third spiral track via a lower slider, and can move in a circular motion along the third spiral track and the fourth spiral track; the number of upper sliders is equal to that of lower sliders.

5. The sewage treatment device with a rotatable membrane module according to claim 4, characterized in that: The interior of the upper slider is hollow, and a plurality of membrane interfaces 1 are provided at the bottom of the upper slider, the number of which is equal to the number of membrane tubes connected to the upper slider, each membrane interface 1 is connected to the top of a membrane tube, and an upper interface is provided at the top of the upper slider; The interior of the lower slider is hollow, and a plurality of membrane interfaces 2 are provided on the top of the lower slider, the number of which is equal to the number of membrane tubes connected to the lower slider, each membrane interface 2 is connected to the bottom end of a membrane tube, and a lower interface is provided at the bottom of the lower slider.

6. The sewage treatment device with a rotatable membrane module according to claim 5, characterized in that: The inner upper frame is provided with an exhaust pipe, which is coiled along the upper surfaces of the first spiral track and the second spiral track. The bottom of the exhaust pipe is provided with a plurality of exhaust interfaces, which are connected one by one with the upper interfaces of the upper slider, so that the gas discharged from the membrane tube is discharged into the exhaust pipe through the upper slider; An air intake pipe is provided on the inner lower frame, and the air intake pipe is coiled along the lower surfaces of the third spiral track and the fourth spiral track. A plurality of air intake interfaces are provided at the bottom of the air intake pipe, and the air intake interfaces are connected one by one with the lower interfaces of the lower slider, so that the gas input by the air intake pipe is discharged into the membrane tube through the lower slider.

7. The sewage treatment device with a rotatable membrane module according to claim 4, characterized in that: The membrane assembly further comprises a plurality of vertically arranged traction rods, the traction rods passing through the inner lower frame and the inner upper frame, and one traction rod is detachably connected to an upper slider and a lower slider; The top of the traction rod passes through the water surface of the pool body and is connected to the top slider on the outer frame. The top slider drives the upper slider and the lower slider to move through the traction rod, thereby driving the membrane tube to move.

8. The sewage treatment device with a rotatable membrane module according to claim 1, characterized in that: The outer frame is arranged above the liquid surface of the pool body, and the outer frame includes a fifth spiral track and a sixth spiral track arranged horizontally, the fifth spiral track and the sixth spiral track are arranged side by side, and both are spirally wound together with the center of the outer frame as the center; the outer frame is concentrically arranged with the inner frame; The starting end of the fifth spiral track is at the center of the outer frame, and then spirals outward in a clockwise or counterclockwise direction, and the end of the fifth spiral track is close to the outer side of the outer frame; The sixth spiral track is located as a whole on the outside of the fifth spiral track, and the distance between the fifth spiral track and the sixth spiral track remains unchanged. The starting end of the sixth spiral track is connected to the starting end of the fifth spiral track through a circular arc track, and then the sixth spiral track spirals outward in the same direction as the fifth spiral track. The end of the sixth spiral track is located on the outer edge of the outer frame, and the end of the fifth spiral track is connected to the end of the sixth spiral track through a circular arc track.

9. The sewage treatment device with a rotatable membrane module according to claim 1, characterized in that: The outer side of the inner upper frame is connected to a plurality of connecting rods, which are evenly arranged along the circumference of the inner upper frame. The connecting rods are vertically arranged and the bottom ends are connected to the outer side of the inner lower frame, and the upper parts of the connecting rods are connected to the outer side of the outer frame. The tops of the connecting rods are higher than the outer frame and are connected in parallel to the rotating shaft of the motor. The motor is arranged above the outer frame and is used to drive the entire membrane assembly to rotate through the connecting rods.

10. The sewage treatment device with a rotatable membrane module according to claim 7, characterized in that: The traction rod is hollow, and both the top and bottom ends are open to prevent sludge from accumulating inside the traction rod; the bottom of the traction rod exceeds the inner lower frame and extends to the lower part of the tank body, and the part of the traction rod below the inner lower frame is called the stirring part, and a hollow strip is provided on one side of the stirring part, and the length of the hollow strip is slightly smaller than the length of the stirring part; A lifting rod is arranged inside the traction rod, and a stirring paddle is arranged at the bottom of the lifting rod. The stirring paddle can be moved up and down by controlling the lifting rod to rise and fall.

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