Environment-friendly sewage treatment equipment

Abstract

The application discloses an environment-friendly sewage treatment equipment, which comprises a filter tank, a first filter, a second filter, an anaerobic reaction box, an aerobic reaction box and a membrane filter which are sequentially connected, a cleaning box is arranged at the bottom of the membrane filter, a movable seat is arranged in the membrane filter, the upper portion of the movable seat is axially slidably connected with the membrane filter through a movable water guide pipe, membrane filaments are arranged at the lower portion of the movable seat, a first flow-through rod is arranged at the lower portion of the movable seat, an isolation plate is fixedly arranged on the first flow-through rod, and a rotating disc which can be combined with the isolation plate and synchronously rotated is rotatably connected to the bottom of the cleaning box. The environment-friendly sewage treatment equipment is used for multi-stage treatment of sewage to obtain clean water. The membrane filter is provided with the cleaning box, the membrane filaments can automatically enter the cleaning box for centrifugal dispersion cleaning, the discharge of impurities between the membrane filaments is facilitated, and backwashing can be realized during the dispersion of the membrane filaments, so that the impurities on the surface of the membrane filaments are separated.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to an environmentally friendly wastewater treatment device. Background Technology

[0002] Currently, with increasingly stringent environmental protection requirements, industrial and domestic wastewater treatment processes are becoming more rigorous. A typical environmentally friendly water treatment system usually includes multi-stage treatment units, such as removing large suspended solids through screens, further purification through multi-media filtration, and then entering the core biological treatment stage, successively undergoing anaerobic and aerobic reactions to utilize microorganisms to degrade organic pollutants. After biological treatment, membrane filtration technology has become a key link in advanced treatment to obtain high-quality reusable clean water.

[0003] Tubular external pressure filtration membrane modules contain a large number of hollow fiber membrane filaments. Under pressure, filtered water flows from the outside of the membrane module into the inside of the membrane filaments. Clean water permeates through the membrane wall into the inner cavity of the membrane filaments and is then collected and discharged. However, suspended solids, colloids, and other contaminants are trapped on the outer surface of the membrane filaments. These trapped contaminants accumulate on the outer wall of the membrane filaments, forming a fouling layer, which leads to a decrease in membrane flux. Conventional backwash water can remove contaminants from the surface of the membrane filaments, but multiple membrane filaments clump together, making it difficult to flush off contaminants. Furthermore, contaminants are not easily trapped between the membrane filaments and are difficult to discharge after flushing, making removal difficult. Removing the membrane filament module from the membrane filter for cleaning allows for decentralized cleaning of the internal membrane filaments, but this process is cumbersome. Summary of the Invention

[0004] This invention addresses the inconvenience of cleaning the internal membrane fibers in existing pipeline membrane filters by proposing an environmentally friendly wastewater treatment device that enables decentralized backwashing and cleaning of the membrane fibers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An environmentally friendly wastewater treatment device includes a filter tank, a first filter, a second filter, an anaerobic reaction chamber, an aerobic reaction chamber, and a membrane filter connected in sequence. A cleaning box connected to the bottom of the membrane filter is provided, and the cleaning box is used to clean the membrane fibers.

[0006] The aforementioned membrane filter has an internal movable seat. The upper part of the movable seat is axially slidably connected to the membrane filter via a movable water guide pipe. Membrane fibers are installed at the lower part of the movable seat. A first flow rod is provided at the lower part of the movable seat, and the membrane fibers are arranged around the first flow rod. A rotating disk is rotatably connected to the bottom of the cleaning box, and the rotating disk is coaxially arranged with the first flow rod. A partition plate is fixedly installed on the first flow rod. When the movable seat is in the upper limit position, the partition plate is located between the membrane filter and the cleaning box, forming a seal between the membrane filter and the cleaning box, and the membrane fibers are located inside the membrane filter. When the movable seat is in the lower limit position, the movable seat is located between the membrane filter and the cleaning box, forming a seal between the membrane filter and the cleaning box, and the partition plate contacts the upper surface of the rotating disk to form a static frictional engagement with the rotating disk, and the membrane fibers are located inside the cleaning box.

[0007] Preferably, the bottom of the cleaning box is provided with a second flow rod and a functional ring. The upper part of the second flow rod is coaxially sleeved inside the first flow rod and forms a sliding seal connection with the first flow rod. The upper end of the first flow rod is used to connect to the movable water guide pipe. The lower part of the second flow rod is connected to the annular flow channel inside the functional ring through a seventh pipe. The functional ring is fixedly connected to the base of the cleaning box. The top of the functional ring is coaxially rotatably connected to a rotating plate, which is fixedly connected to a rotating disk. The flow channel is provided with a fixed block and a moving block. An isolation block and a fourth elastic element are provided between the fixed block and the moving block. The water inlet space between the fixed block and the moving block is connected to the seventh pipe. The moving block is fixedly connected to the rotating plate. The water flow inside the water inlet space is used to push the moving block to move, thereby causing the rotating plate to rotate.

[0008] Preferably, the movable seat is internally provided with a third flow rod for connecting the movable water guide pipe. The third flow rod is coaxially arranged with the first flow rod, and there is a gap between the lower end of the third flow rod and the upper end of the first flow rod. A bracket and a top rod are fixedly arranged inside the third flow rod. A first sealing plate is provided at the top of the first flow rod. The first sealing plate is connected to the bracket by a first elastic element. A flow hole is provided in the middle of the first sealing plate. A second sealing plate for sealing the flow hole is elastically connected to the bottom of the first sealing plate. When the movable seat is in the lower limit position, the top rod is used to push the second sealing plate to separate from the first sealing plate to open the flow hole.

[0009] Preferably, the diameter of the second sealing plate is larger than the diameter of the flow hole, and the diameter of the second sealing plate is smaller than the inner diameter of the second flow rod.

[0010] Preferably, a sliding block is provided at the bottom of the second flow rod. The sliding block is slidably connected to the base through a guide sleeve. A third elastic element is provided between the sliding block and the base. A guide block is fixedly connected to the sliding block. The guide block has a guide slope. A push plate is fixedly provided on the rotating plate. The push plate is used to contact the guide slope of the guide block and push the guide block to move so as to form the axial movement of the second flow rod, thereby realizing the separation of the first sealing plate and the end face of the third flow rod.

[0011] Preferably, a third limiting ring is provided on the outside of the second flow rod, and the third limiting ring is located below the rotating disk.

[0012] Preferably, the bottom of the membrane filter is connected to a fourth pipe for water inlet and a fifth pipe for backwash water outlet.

[0013] Preferably, the bottom of the movable seat is provided with a second limiting ring, and the bottom of the membrane filter is provided with a first limiting ring.

[0014] Preferably, the environmentally friendly wastewater treatment equipment also includes a lifting cylinder, the axis of which is vertically set, and the working end of the lifting cylinder is connected to the movable water guide pipe.

[0015] Preferably, the top of the rotating disk is provided with a connecting groove for the lower end of the first flow rod.

[0016] The beneficial effects of this invention are:

[0017] This environmentally friendly wastewater treatment equipment performs multi-stage treatment of wastewater, including filtration, anaerobic treatment, aerobic treatment, and membrane filtration, to produce clean water. It achieves centralized treatment with a small footprint. The membrane filter in this equipment is equipped with a cleaning tank. The membrane fibers automatically enter the cleaning tank for centrifugal dispersion and cleaning, which facilitates the removal of impurities between the fibers. After cleaning, the fibers can automatically re-enter the membrane filter for filtration, achieving automatic fiber cleaning. The membrane fiber dispersion in this equipment is hydraulically driven, with a compact structure. Backwashing can also be performed during the dispersion process, further facilitating the removal of impurities from the membrane fiber surface. Attached Figure Description Figure 1 This is a schematic diagram of the structure of this environmentally friendly wastewater treatment equipment; Figure 2 This is a schematic diagram of the front of this environmentally friendly wastewater treatment equipment; Figure 3 This is a schematic diagram of the membrane filter (with the movable seat at the upper limit position) of this environmentally friendly wastewater treatment equipment. Figure 4 This is an environmentally friendly wastewater treatment equipment Figure 3 Schematic diagram of the structure at point A; Figure 5This is a schematic diagram of the membrane filter (with the movable seat at the lower limit position) of this environmentally friendly wastewater treatment equipment. Figure 6 This is an environmentally friendly wastewater treatment equipment Figure 5 Schematic diagram of the structure at point B; Figure 7 This is an environmentally friendly wastewater treatment equipment Figure 5 Schematic diagram of the structure at point C; Figure 8 This is an environmentally friendly wastewater treatment equipment Figure 7 Schematic diagram of the cross section at the middle EE; Figure 9 This is a schematic diagram of the functional ring of this environmentally friendly wastewater treatment equipment; Figure 10 This is a top-view structural diagram of the functional ring of this environmentally friendly wastewater treatment equipment; Figure 11 This is an environmentally friendly wastewater treatment equipment Figure 3 Schematic diagram of the cross-section at point DD; Figure 12 This is a schematic diagram of the top surface of the rotating disc of this environmentally friendly wastewater treatment equipment.

[0018] In the diagram: 101, Filter tank; 102, First filter; 103, Second filter; 104, Anaerobic reaction chamber; 105, Aerobic reaction chamber; 106, Membrane filter; 107, Cleaning box; 108, Movable water guide pipe; 109, Bar screen; 1010, First pipe; 1011, Second pipe; 1012, Third pipe; 1013, Fourth pipe; 1014, Fifth pipe; 1015, Lifting cylinder; 1061, First limiting ring; 1071, Inlet pipe; 1071, Drain pipe; 1081, Sixth pipe; 1. Movable seat; 2. Membrane fiber; 3. First flow rod; 4. Second flow rod; 5. Rotary disk; 6. Base; 7. Functional ring; 8. Third flow rod; 9. First sealing plate; 10. Bracket; 11. Second limiting ring; 12. Top rod; 13. First elastic element; 14. Sliding block; 15. Guide sleeve; 16. Third elastic element; 17. Seventh pipe; 18. Connecting rod; 19. Push plate; 31. Isolation plate; 41. Third limiting ring; 51. Connecting groove; 71. Flow channel; 72. Rotating plate; 73. Eighth pipe; 74. Fixing block; 75. Isolation block; 76. Moving block; 77. Fourth elastic element; 91. Flow hole; 92. Second sealing plate; 93. Second elastic element; 94. Guide rod; 95. Mesh plate; 96. Through hole; 141. Extension rod; 142. Guide block. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figure 1-2 An environmentally friendly wastewater treatment device includes a filter tank 101, a first filter 102, a second filter 103, an anaerobic reaction chamber 104, an aerobic reaction chamber 105, and a membrane filter 106. The filter tank 101, first filter 102, second filter 103, anaerobic reaction chamber 104, aerobic reaction chamber 105, and membrane filter 106 are sequentially connected and interconnected. The outlet of the filter tank 101 is connected to the inlet of the first filter 102. The first filter 102 and the second filter 103 are connected via a first pipe 1010. The second filter 103 is connected to the anaerobic reaction chamber 104 via a second pipe 1011. The anaerobic reaction chamber 104 and the aerobic reaction chamber 105 are connected via a third pipe 1012. The aerobic reaction chamber 105 and the membrane filter 106 are connected via a fourth pipe 1013. Wastewater passes sequentially through filter tank 101, first filter 102, second filter 103, anaerobic reaction tank 104, aerobic reaction tank 105, and membrane filter 106, achieving multi-stage treatment including wastewater filtration, anaerobic, aerobic, and membrane filtration to obtain clean water.

[0021] Specifically, the filter tank 101 is equipped with a screen 109, which is used to remove larger suspended and floating objects in the wastewater, such as leaves, plastics, and fibers. The first filter 102 is a coarse filter, and the second filter 103 is a fine filter. The first filter 102 and the second filter 103 constitute a two-stage filtration system, removing fine suspended particles, colloidal substances, some dissolved organic matter, and color remaining in the wastewater after screen pretreatment, thus providing good influent conditions for the subsequent biological treatment unit.

[0022] In the anaerobic or anoxic environment of anaerobic reactor 104, facultative and anaerobic bacteria, dominant organisms, hydrolyze, acidify, and methanate high-molecular-weight organic pollutants in the wastewater, effectively degrading large-molecule organic matter, improving the biodegradability of the wastewater, and simultaneously removing some of the organic load. Aerobic reactor 105 continues the anaerobic treatment, utilizing the metabolic activity of aerobic microorganisms (including flocculants and nitrifying bacteria) to completely oxidize and decompose the small-molecule organic matter produced in the anaerobic stage, as well as pollutants such as ammonia nitrogen in the wastewater, into stable substances such as carbon dioxide, water, and nitrates. This removes chemical oxygen demand (COD) from the wastewater and achieves ammonia nitrogen nitrification, reducing the eutrophication potential of the water body.

[0023] The membrane filter 106 described above uses MABR membrane fibers for filtration, which can efficiently remove residual activated sludge flocs, suspended particles, bacteria, and even most viruses from the effluent of the aerobic reaction tank 105, ultimately producing clean water. (Reference) Figure 3 The membrane filter 106 has a movable seat 1 inside. Multiple U-shaped membrane fibers 2 are arranged at the lower part of the movable seat 1. The two ends of the membrane fibers 2 are fixedly connected to the movable seat 1 and communicate with its interior. A movable water guide pipe 108 is connected to the top of the movable seat 1. The lower end of the movable water guide pipe 108 is connected to the movable seat 1 and communicates with its interior. The upper end of the movable water guide pipe 108 extends from the interior of the membrane filter 106 and is connected to a sixth pipe 1081, which is a flexible hose. Water enters the membrane filter 106 through the fourth pipe 1013, passes through the membrane fibers 2 to obtain clean water, enters the interior of the movable seat 1, and finally exits the membrane filter 106 through the movable water guide pipe 108 and the sixth pipe 1081.

[0024] A cleaning box 107 is provided at the bottom of the membrane filter 106, and the bottom of the membrane filter 106 is connected to the top of the cleaning box 107. The cleaning box 107 is used for cleaning the membrane fibers 2. The environmentally friendly wastewater treatment equipment also includes a lifting cylinder 1015, the axis of which is vertically arranged, and the working end of the lifting cylinder 1015 is connected to the movable water guide pipe 108. The movable water guide pipe 108 is slidably connected to the membrane filter 106 in the vertical direction. The lifting cylinder 1015 is used to drive the movable water guide pipe 108 to move, thereby realizing the movement of the movable seat 1 and the membrane fibers 2 between the membrane filter 106 and the cleaning box 107. The movable seat 1 can move between the upper limit position and the lower limit position.

[0025] During the movement of the movable water guide pipe 108, part of the movable water guide pipe 108 will enter the interior of the membrane filter 106. Therefore, in this embodiment, the membrane filter 106 is provided with an annular brush on top, which is sleeved on the outside of the movable water guide pipe 108 to clean the outside of the movable water guide pipe 108.

[0026] Furthermore, a first flow rod 3 is fixedly installed at the lower part of the movable seat 1. The first flow rod 3 is located at the center of the movable seat 1 and is coaxially arranged with the movable seat 1. The upper part of the first flow rod 3 extends into the interior of the movable seat 1, and the lower part of the first flow rod 3 extends below the membrane filament 2. (Refer to...) Figure 11The membrane fibers 2 are arranged in a ring around the first flow rod 3 on the movable seat 1. A separator plate 31 is fixedly installed on the first flow rod 3, and the separator plate 31 is located below the membrane fibers 2. When the movable seat 1 is in the upper limit position, that is, when the membrane fibers 2 are inside the membrane filter 106, the separator plate 31 is located between the membrane filter 106 and the cleaning box 107, and the upper surface of the separator plate 31 is in contact with the top of the cleaning box 107, forming a seal between the membrane filter 106 and the cleaning box 107. At this time, a relatively sealed filtration space is formed inside the membrane filter 106.

[0027] The bottom of the cleaning box 107 is provided with a base 6, and a second flow rod 4 is provided on the base 6. The second flow rod 4 is coaxially arranged with the first flow rod 3. The upper part of the second flow rod 4 is sleeved inside the first flow rod 3 and forms a sliding seal connection with the first flow rod 3. At the same time, the second flow rod 4 and the first flow rod 3 are in a communicating state.

[0028] Further reference Figure 3 and Figure 7 The bottom of the cleaning box 107 is provided with a rotating disk 5 and a base 6, which are rotatably connected. The rotating disk 5 is coaxially arranged with the second flow rod 4, which passes through the central hole of the rotating disk 5. The upper surface of the rotating disk 5 is provided with an upper mating surface, and the lower surface of the isolation plate 31 is a lower mating surface. When the movable seat 1 is in the lower limit position, the movable seat 1 is located between the membrane filter 106 and the cleaning box 107, forming a seal between the membrane filter 106 and the cleaning box 107. The membrane fiber 2 is located inside the cleaning box 107. At this time, the lower surface of the isolation plate 31 contacts the upper surface of the rotating disk 5, and a static friction engagement is formed between the isolation plate 31 and the rotating disk 5, allowing them to rotate synchronously.

[0029] In this embodiment, a second limiting ring 11 is provided at the bottom of the movable seat 1, and the second limiting ring 11 is rotatably connected to the movable seat 1. A first limiting ring 1061 is provided at the bottom of the membrane filter 106, and the first limiting ring 1061 is located between the membrane filter 106 and the cleaning box 107. The first limiting ring 1061 is used to limit the second limiting ring 11. At the same time, the second limiting ring 11 of the movable seat 1 contacts the first limiting ring 1061 to form a contact seal, thereby achieving a seal between the membrane filter 106 and the cleaning box 107.

[0030] In this embodiment, the second flow rod 4 passes through the rotating disk 5, as shown in the reference. Figure 12 The top of the rotating disk 5 is provided with a connecting groove 51, which is located outside the second flow rod 4 and is used to accommodate the lower end of the first flow rod 3.

[0031] Furthermore, a functional ring 7 is fixedly installed inside the base 6, for reference. Figure 8The functional ring 7 and the second flow rod 4 are coaxially arranged. The interior of the functional ring 7 is an annular flow channel 71. The lower part of the second flow rod 4 is connected to the annular flow channel 71 inside the functional ring 7 via a seventh pipe 17, which is a flexible hose. A rotating plate 72 is provided at the top of the functional ring 7, coaxially arranged with the functional ring 7, forming a rotary seal connection. The rotating plate 72 is fixedly connected to the rotating disk 5 via a connecting rod 18.

[0032] refer to Figure 8 The aforementioned flow channel 71 is internally provided with a fixed block 74 and a movable block 76. The fixed block 74 is fixedly connected to the functional ring 7, and the movable block 76 is slidably connected to the functional ring 7, allowing the movable block 76 to move within the flow channel 71. An isolation block 75 and a fourth elastic element 77 are provided between the fixed block 74 and the movable block 76. The isolation block 75 isolates the fixed block 74 and the movable block 76, creating a water inlet space that communicates with the seventh pipe 17. One end of the fourth elastic element 77 is fixedly connected to the fixed block 74, and the other end is fixedly connected to the movable block 76. The fourth elastic element 77 is in a stretched state, causing the movable block 76 to tend to move closer to the fixed block 74. The movable block 76 contacts the isolation block 75, at which point the movable block 76 is in a first position.

[0033] The upper part of the aforementioned movable block 76 is fixedly connected to the rotating plate 72. After water from the seventh pipe 17 enters the water inlet space, the water pressure can push the movable block 76 to move inside the flow channel 71, forming a forward rotation of the rotating plate 72. An eighth pipe 73 is also connected to the functional ring 7, which communicates with the flow channel 71 and is used for drainage of the flow channel 71. When the movable block 76 moves to contact the fixed block 74, the movable block 76 is in the second position. The eighth pipe 73 communicates with the seventh pipe 17 through the flow channel 71, and the water inside the flow channel 71 can be directly discharged from the eighth pipe 73. The water pressure inside the flow channel 71 decreases, and under the action of the fourth elastic element 77, the movable block 76 resets, forming a reverse rotation of the rotating plate 72.

[0034] The aforementioned rotating plate 72 can reciprocate, and the rotating disk 5 follows the rotating plate 72, also reciprocating. In this embodiment, the movable water guide pipe 108 is rotatably connected to the movable seat 1, which can rotate inside the membrane filter 106. When the separator plate 31 contacts the rotating disk 5, the separator plate 31, the first flow rod 3, and the movable seat 1 can all reciprocate. When the movable seat 1 reciprocates, the membrane fibers 2 generate centrifugal force, causing them to disperse, which facilitates the discharge of impurities between the membrane fibers 2.

[0035] In this embodiment, a water inlet pipe 1071 is provided at the upper part of the cleaning tank 107, and a drain pipe 1072 is provided at the lower part of the cleaning tank 107, for the purpose of allowing water to enter and exit the cleaning tank 107. When cleaning the membrane fibers 2, the cleaning tank 107 needs to be filled with water, so that the membrane fibers 2 can float in the water, which facilitates the stretching of the membrane fibers 2.

[0036] In this embodiment, the bottom of the membrane filter 106 is connected to a fifth pipe 1014, which is used for drainage. When the membrane fiber 2 needs backwashing, water can enter through the movable water guide pipe 108, and the backwash water enters the membrane fiber 2 from the movable seat 1 to achieve backwashing of the membrane fiber 2. The backwash water can be discharged from the fifth pipe 1014.

[0037] In this embodiment, reference Figure 4 The movable seat 1 is internally provided with a third flow rod 8, which is coaxially arranged with the first flow rod 3. The upper end of the third flow rod 8 is connected to the movable water guide pipe 108, and the lower end of the third flow rod 8 is opposite to the upper end of the first flow rod 3 with a gap. Water inside the third flow rod 8 enters the interior of the movable seat 1 through this gap. A bracket 10 is fixedly installed inside the third flow rod 8. The bracket 10 is composed of rods and does not affect the flow of water inside the third flow rod 8. A first sealing plate 9 is provided at the top of the first flow rod 3. The first sealing plate 9 is connected to the bracket 10 through a first elastic member 13. The first elastic member 13 is in a compressed state and is used to apply pressure to the first sealing plate 9, so that the first sealing plate 9 is located on the upper end face of the first flow rod 3 to seal it.

[0038] The first sealing plate 9 has a flow hole 91 in its middle, and a second sealing plate 92 is provided at its bottom, which seals the flow hole 91. A mesh plate 95 is fixedly provided at the top of the first sealing plate 9, covering the flow hole 91. The second sealing plate 92 is connected to the mesh plate 95 via a second elastic member 93. The second elastic member 93 is in a stretched state, so that the second sealing plate 92 is tightly pressed against the first sealing plate 9, maintaining the sealing state of the flow hole 91. A guide rod 94 is fixedly connected to the second sealing plate 92, and the guide rod 94 is slidably connected to the mesh plate 95, reducing the possibility of bending or twisting of the second elastic member 93.

[0039] In this embodiment, the diameter of the second sealing plate 92 is larger than the diameter of the flow hole 91, and the diameter of the second sealing plate 92 is smaller than the inner diameter of the second flow rod 4. A top rod 12 is fixedly connected to the lower part of the bracket 10, and a through hole 96 is provided on the mesh plate 95 to accommodate the top rod 12 passing through. When the movable seat 1 is at its lower limit position, refer to... Figure 6The second flow rod 4 can push the first sealing plate 9 upward, causing the first sealing plate 9 to move away from the first flow rod 3 and contact the lower end of the third flow rod 8. The top rod 12 can push the second sealing plate 92 to separate from the first sealing plate 9, opening the flow hole 91. In this embodiment, the diameter of the top rod 12 is smaller than the diameter of the flow hole 91, ensuring that the flow hole 91 has flow capacity. At this time, the third flow rod 8 is connected to the second flow rod 4, and the water entering from the third flow rod 8 can enter the flow channel 71 of the functional ring 7 through the second flow rod 4 and the seventh pipe 17, realizing the reciprocating rotation of the rotating disk 5.

[0040] Further reference Figure 7 A guide sleeve 15 is fixedly installed inside the base 6. A sliding block 14 is connected to the bottom of the second flow rod 4. The sliding block 14 is slidably connected to the base 6 through the guide sleeve 15. A third elastic element 16 is provided between the sliding block 14 and the base 6. The third elastic element 16 is in an extended state, and the sliding block 14 has a tendency to move upward. A third limiting ring 41 is provided outside the second flow rod 4. The third limiting ring 41 is located below the rotating disk 5. The third limiting ring 41 is used to restrict the upward movement of the second flow rod 4. In this embodiment, the supporting force of the third elastic element 16 on the second flow rod 4 is greater than the supporting force of the first elastic element 13 on the first sealing plate 9.

[0041] refer to Figure 9 and 10 The sliding block 14 is fixedly connected to the guide block 142 via the extension rod 141. The guide block 142 has a guide slope. A push plate 19 is fixedly installed on the rotating plate 72, and the push plate 19 can rotate with the rotating plate 72. When the moving block 76 approaches the second position, the push plate 19 can contact the guide slope of the guide block 142 and push the guide block 142 to move, causing the second flow rod 4 to move downward axially. The separation of the first sealing plate 9 and the end face of the third flow rod 8 breaks the complete communication between the third flow rod 8 and the second flow rod 4, reduces the water pressure in the internal flow channel 71 of the functional ring 7, and facilitates the return of the moving block 76. At the same time, the third flow rod 8 is connected to the internal space of the movable seat 1, and water can enter the interior of the membrane fiber 2 through the movable seat 1 to realize the backwashing of the membrane fiber 2. That is, backwashing can be performed during the reverse rotation of the membrane fiber 2. Backwashing of the membrane fiber 2 during the dispersion process is beneficial to the removal of impurities from the surface of the membrane fiber 2.

[0042] After the membrane fiber 2 is cleaned, the lifting cylinder 1015 can drive the movable water guide pipe 108 to move upward, and the movable seat 1 returns to the upper limit position to continue the filtration work, realizing the automatic switching of the membrane fiber 2 between the filtration working state and the cleaning state.

[0043] The membrane filter 106 of this environmentally friendly wastewater treatment equipment includes the following working process: (a) Membrane filter 106 is in filtration mode. Wastewater sequentially passes through filter tank 101, first filter 102, second filter 103, anaerobic reactor 104, aerobic reactor 105, and membrane filter 106. Filter tank 101 removes larger suspended solids and floating matter from the water. First filter 102 and second filter 103 filter the wastewater. Anaerobic reactor 104 hydrolyzes, acidifies, and methanates high molecular weight organic pollutants in the wastewater. Aerobic reactor 105 removes chemical oxygen demand (COD) from the wastewater and achieves ammonia nitrification. Membrane filter 106 performs membrane filtration on the wastewater to obtain clean water.

[0044] During the above process, the movable seat 1 of the membrane filter 106 is in its upper limit position, that is, the membrane fiber 2 is located inside the membrane filter 106. The separator 31 is located between the membrane filter 106 and the cleaning box 107, and the upper surface of the separator 31 is in contact with the top of the cleaning box 107, forming a seal between the membrane filter 106 and the cleaning box 107. At this time, water enters the filtration space inside the membrane filter 106 from the fourth pipe 1013, passes through the membrane fiber 2, and becomes clean water. The clean water enters the interior of the movable seat 1 and finally exits the membrane filter 106 from the movable water guide pipe 108 and the sixth pipe 1081.

[0045] (ii) Membrane filter 106 is in backwashing state. The cleaning water enters the movable seat 1 from the movable water guide pipe 108, and then enters the membrane fiber 2 to achieve backwashing of the membrane fiber 2. The backwash water can be discharged from the fifth pipe 1014.

[0046] (III) Membrane filter 106 is in membrane fiber cleaning state. The lifting cylinder 1015 drives the movable water guide pipe 108 and the movable seat 1 to move downwards, the second flow rod 4 moves upwards relative to the first flow rod 3, and the top of the second flow rod 4 pushes the first sealing plate 9 to move upwards. When the movable seat 1 is at the lower limit position, the movable seat 1 is located between the membrane filter 106 and the cleaning box 107, and the membrane filter 106 and the cleaning box 107 are sealed. The membrane fiber 2 is located inside the cleaning box 107. The lower surface of the isolation plate 31 contacts the upper surface of the rotating disk 5, and a static friction combination is formed between the isolation plate 31 and the rotating disk 5. At the same time, the first sealing plate 9 leaves the first flow rod 3 and contacts the lower end of the third flow rod 8. The top rod 12 restricts the displacement of the second sealing plate 92, so that the second sealing plate 92 is separated from the first sealing plate 9, the flow hole 91 is opened, and the third flow rod 8 and the second flow rod 4 are in a connected state. The cleaning box 107 needs to be filled with water. The membrane fiber 2 can float in the water. Clean water is introduced into the third flow rod 8. The water can enter the flow channel 71 of the functional ring 7 through the second flow rod 4 and the seventh pipe 17. After the water enters the water inlet space of the flow channel 71, the water pressure can push the moving block 76 to move inside the flow channel 71, forming a forward rotation of the rotating plate 72. When the moving block 76 moves to the second position, the eighth pipe 73 is connected to the seventh pipe 17 through the flow channel 71. The water inside the flow channel 71 can be directly discharged from the eighth pipe 73. The water pressure inside the flow channel 71 drops. Under the action of the fourth elastic element 77, the moving block 76 is reset, forming a reverse rotation of the rotating plate 72, realizing the reciprocating rotation of the rotating disk 5. The isolation plate 31, the first flow rod 3, and the movable seat 1 can all generate reciprocating rotation. When the movable seat 1 reciprocates, the membrane fiber 2 generates centrifugal motion and disperses, which is conducive to the discharge of impurities between the membrane fibers 2. As the moving block 76 approaches the second position, the push plate 19 can contact the guide slope of the guide block 142 and push the guide block 142 to move, causing the second flow rod 4 to move downward axially. The separation of the first sealing plate 9 and the end face of the third flow rod 8 breaks the complete communication between the third flow rod 8 and the second flow rod 4, reduces the water pressure in the internal flow channel 71 of the functional ring 7, and facilitates the return of the moving block 76. At the same time, the third flow rod 8 is connected to the internal space of the movable seat 1, and water can enter the interior of the membrane fiber 2 through the movable seat 1 to achieve backwashing of the membrane fiber 2. That is, backwashing can be performed during the reverse rotation of the membrane fiber 2. Backwashing of the membrane fiber 2 during the dispersion process is beneficial to the removal of impurities from the surface of the membrane fiber 2.

[0047] After the membrane fiber 2 is cleaned, the lifting cylinder 1015 can drive the movable water guide pipe 108 to move upward, and the movable seat 1 returns to the upper limit position to continue the filtration work, realizing the automatic switching of the membrane fiber 2 between the filtration working state and the cleaning state.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An environmentally friendly wastewater treatment device, comprising a filter tank, a first filter, a second filter, an anaerobic reaction chamber, an aerobic reaction chamber, and a membrane filter connected in sequence, characterized in that, The bottom of the membrane filter is provided with a cleaning box that communicates with the membrane filter, and the cleaning box is used to clean the membrane fibers; The membrane filter is provided with a movable seat inside. The upper part of the movable seat is axially slidably connected to the membrane filter through a movable water guide pipe. The membrane fibers are installed on the lower part of the movable seat. A first flow rod is provided on the lower part of the movable seat. The membrane fibers are arranged around the movable seat with the first flow rod as the center. A rotating disk is rotatably connected to the bottom of the cleaning box. The rotating disk is coaxially arranged with the first flow rod. An isolation plate is fixedly installed on the first flow rod. When the movable seat is in the upper limit position, the isolation plate is located between the membrane filter and the cleaning box and forms a seal between the membrane filter and the cleaning box, and the membrane fibers are located inside the membrane filter. When the movable seat is in the lower limit position, the movable seat is located between the membrane filter and the cleaning box and forms a seal between the membrane filter and the cleaning box. The isolation plate contacts the upper surface of the rotating disk to form a static frictional engagement with the rotating disk, and the membrane fibers are located inside the cleaning box. The bottom of the cleaning box is provided with a second flow rod and a functional ring. The upper part of the second flow rod is coaxially sleeved inside the first flow rod and forms a sliding seal connection with the first flow rod. The upper end of the first flow rod is used to connect to the movable water guide pipe. The lower part of the second flow rod is connected to the annular flow channel inside the functional ring through a seventh pipe. The functional ring is fixedly connected to the base of the cleaning box. The top of the functional ring is coaxially rotatably connected to a rotating plate. The rotating plate is fixedly connected to the rotating disk. The flow channel is provided with a fixed block and a movable block. An isolation block and a fourth elastic element are provided between the fixed block and the movable block. The water inlet space between the fixed block and the movable block is connected to the seventh pipe. The movable block is fixedly connected to the rotating plate. The water flow inside the water inlet space is used to push the movable block to move so as to form the rotation of the rotating plate. The movable seat is provided with a third flow rod for connecting the movable water guide pipe. The third flow rod is coaxial with the first flow rod, and there is a gap between the lower end of the third flow rod and the upper end of the first flow rod. The third flow rod is internally fixed with a bracket and a top rod. The top of the first flow rod is provided with a first sealing plate. The first sealing plate is connected to the bracket by a first elastic element. The middle part of the first sealing plate is provided with a flow hole. The bottom of the first sealing plate is elastically connected with a second sealing plate for sealing the flow hole. When the movable seat is in the lower limit position, the top rod is used to push the second sealing plate to separate from the first sealing plate to open the flow hole.

2. The environmentally friendly wastewater treatment equipment according to claim 1, characterized in that, The diameter of the second sealing plate is larger than the diameter of the flow hole, and the diameter of the second sealing plate is smaller than the inner diameter of the second flow rod.

3. The environmentally friendly wastewater treatment equipment according to claim 2, characterized in that, A sliding block is provided at the bottom of the second flow rod. The sliding block is slidably connected to the base through a guide sleeve. A third elastic element is provided between the sliding block and the base. A guide block is fixedly connected to the sliding block. The guide block has a guide slope. A push plate is fixedly provided on the rotating plate. The push plate is used to contact the guide slope of the guide block and push the guide block to move so as to form the axial movement of the second flow rod, thereby realizing the separation of the first sealing plate and the end face of the third flow rod.

4. The environmentally friendly wastewater treatment equipment according to claim 3, characterized in that, A third limiting ring is provided on the outside of the second flow rod, and the third limiting ring is located below the rotating disk.

5. The environmentally friendly wastewater treatment equipment according to any one of claims 1-4, characterized in that, The bottom of the membrane filter is connected to a fourth pipe for water inlet and a fifth pipe for backwash water outlet.

6. The environmentally friendly wastewater treatment equipment according to any one of claims 1-4, characterized in that, The bottom of the movable seat is provided with a second limiting ring, and the bottom of the membrane filter is provided with a first limiting ring.

7. The environmentally friendly wastewater treatment equipment according to any one of claims 1-4, characterized in that, It also includes a lifting cylinder, the axis of which is vertically set, and the working end of which is connected to a movable water guide pipe.

8. The environmentally friendly wastewater treatment equipment according to any one of claims 1-4, characterized in that, The top of the rotating disk is provided with a connecting groove for the lower end of the first flow rod.

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