Environment-friendly sewage treatment equipment

Abstract

The invention discloses 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 communicated, a cleaning box is arranged at the bottom of the membrane filter, and a movable seat is arranged in the membrane filter. The upper portion of the movable seat is in axial sliding connection with the membrane filter through a movable water guide pipe, the membrane filaments are installed on the lower portion of the movable seat, a first circulation rod is arranged on the lower portion of the movable seat, an isolation plate is fixedly arranged on the first circulation rod, and the bottom of the cleaning box is rotationally connected with a rotating disc which can be combined with the isolation plate and rotate synchronously with the isolation plate. The environment-friendly sewage treatment equipment is used for carrying out multi-stage treatment on sewage to obtain clear water, the membrane filter is provided with the cleaning box, membrane filaments can automatically enter the cleaning box to be subjected to centrifugal dispersion cleaning, discharging of impurities among the membrane filaments is facilitated, meanwhile, backwashing can be achieved in the membrane filament dispersion process, and the efficiency is improved. The membrane wire surface impurity separation is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, and particularly relates to an environment-friendly sewage treatment equipment. BACKGROUND

[0002] At present, with the increasing environmental protection requirements, the industrial and domestic sewage treatment process is becoming more and more rigorous. A typical environment-friendly water treatment system usually comprises multiple treatment units, such as removing large particle suspensions through a grid, further purifying through a multi-medium filter, and then entering a core biological treatment stage, sequentially passing through anaerobic and aerobic reactions, and utilizing microorganisms to degrade organic pollutants. After biochemical treatment, in order to obtain high-quality recycled clean water, membrane filtration technology has become a key link of deep treatment.

[0003] A large number of hollow fiber membrane filaments are packaged inside a tubular outer pressure type filter membrane assembly. The water to be filtered flows from the outside of the membrane assembly to the inside of the membrane filaments under pressure driving. The clean water passes through the membrane wall into the membrane filament lumen and is then collected and output. Suspensions, colloids and other pollutants are intercepted on the outer surface of the membrane filaments. The intercepted pollutants continuously accumulate on the outer wall of the membrane filaments to form a pollution blocking layer, resulting in a decrease in membrane flux. Conventional backwash water can remove the pollutants on the surface of the membrane filaments, but a plurality of membrane filaments are gathered together, which is not conducive to the falling of the pollutants, and the pollutants are not easy to be sandwiched between the membrane filaments. After falling, the pollutants are also not easy to be discharged, and are difficult to be removed. The membrane filament assembly is removed from the membrane filter for cleaning, and the internal membrane filaments can be dispersedly cleaned, but the process is tedious. SUMMARY

[0004] The present application proposes an environment-friendly sewage treatment equipment to realize dispersed backwashing and cleaning of the membrane filaments, for the inconvenient cleaning of the internal membrane filaments of the pipeline type membrane filter in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: An environment-friendly sewage treatment equipment 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 in communication. The bottom of the membrane filter is provided with a cleaning box in communication with the membrane filter, and the cleaning box is used for cleaning the membrane filaments.

[0006] The inside of the membrane filter is provided with a movable seat, the upper part of the movable seat is connected with the membrane filter in the axial sliding through a movable water guide pipe, the membrane wire is installed at the lower part of the movable seat, the lower part of the movable seat is provided with a first flow-through rod, the membrane wire is arranged around the first flow-through rod, the bottom of the cleaning box is rotatably connected with a rotating disc, and the rotating disc is coaxially arranged with the first flow-through rod. The first flow-through rod is fixedly provided with a separation plate, when the movable seat is located at the upper limit position, the separation 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 wire is located in the inside of the membrane filter; when the movable seat is located at 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 separation plate contacts the upper surface of the rotating disc to form a static friction combination between the rotating disc, and the membrane wire is located in the inside of the cleaning box.

[0007] Preferably, the bottom of the cleaning box is provided with a second flow-through rod and a functional ring, the upper part of the second flow-through rod is coaxially sleeved in the inside of the first flow-through rod and is in sliding sealing connection with the first flow-through rod, the upper end of the first flow-through rod is used for communicating the movable water guide pipe, the lower part of the second flow-through rod is communicated with an annular flow channel in the inside of the functional ring through a seventh pipeline, the functional ring is fixedly connected to the base of the cleaning box, the top of the functional ring is coaxially rotatably connected with a rotating plate, and the rotating plate is fixedly connected with the rotating disc. The inside of the flow channel is provided with a fixed block and a moving block, the fixed block and the moving block are provided with a separation block and a fourth elastic piece therebetween, the water inlet space between the fixed block and the moving block is communicated with the seventh pipeline, the moving block is fixedly connected to the rotating plate, and the water flow in the water inlet space is used to push the moving block to move to form the rotation of the rotating plate.

[0008] Preferably, the inside of the movable seat is provided with a third flow-through rod for communicating the movable water guide pipe, the third flow-through rod is coaxially arranged with the first flow-through rod, and the lower end of the third flow-through rod has a gap with the upper end of the first flow-through rod. The inside of the third flow-through rod is fixedly provided with a support and a top rod, the top of the first flow-through rod is provided with a first sealing plate, the first sealing plate is connected with the support through a first elastic piece, the middle part of the first sealing plate is provided with a flow-through hole, and the bottom of the first sealing plate is elastically connected with a second sealing plate for sealing the flow-through hole. When the movable seat is located at the lower limit position, the top rod is used to push the second sealing plate to separate from the first sealing plate to form the opening of the flow-through hole.

[0009] Preferably, the diameter size of the second sealing plate is greater than the diameter size of the flow-through hole, and the diameter size of the second sealing plate is less than the inner hole diameter size of the second flow-through rod.

[0010] Preferably, the bottom of the second flow rod is provided with a sliding block, the sliding block is slidably connected with the base through a guide sleeve, a third elastic member is arranged between the sliding block and the base, the sliding block is fixedly connected with a guide block, the guide block has a guide slope, a push plate is fixedly arranged on the rotating plate, the push plate is used for contacting the guide slope of the guide block and pushing the guide block to move to form axial movement of the second flow rod, and separation of the first sealing plate and the end surface of the third flow rod is realized.

[0011] Preferably, the second flow rod is externally provided with a third limiting ring, and the third limiting ring is located below the rotating disc.

[0012] Preferably, the bottom of the membrane filter is communicated with a fourth pipeline for water inflow and a fifth pipeline for backwashing water outflow.

[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 environment-friendly sewage treatment equipment further comprises a lifting cylinder, an axis of the lifting cylinder is vertically arranged, and a working end of the lifting cylinder is connected to the movable water guide pipe.

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

[0016] The environment-friendly sewage treatment equipment has the following beneficial effects: The environment-friendly sewage treatment equipment is used for multi-stage treatment such as filtration treatment, anaerobic treatment, aerobic treatment and membrane filtration on sewage, obtains clean water, realizes centralized treatment, and has small land occupation. The membrane filter of the environment-friendly sewage treatment equipment is provided with a cleaning box, membrane filaments can automatically enter the cleaning box for centrifugal dispersion cleaning, which is beneficial to discharge of impurities between the membrane filaments, and the membrane filaments can automatically enter the membrane filter again for filtration work after cleaning, so that automatic cleaning of the membrane filaments is realized. The membrane filaments in the membrane filter of the environment-friendly sewage treatment equipment are dispersed by hydraulic driving, the structure is compact, and backwashing can be realized during the dispersion of the membrane filaments, which is beneficial to separation of impurities on the surface of the membrane filaments. BRIEF DESCRIPTION OF DRAWINGS Figure 1 FIG. 1 is a structural schematic view of the environment-friendly sewage treatment equipment; Figure 2 FIG. 2 is a structural schematic view of the front of the environment-friendly sewage treatment equipment; Figure 3 FIG. 3 is a structural schematic view of the membrane filter (the movable seat is located at the upper limit position) of the environment-friendly sewage treatment equipment; Figure 4 FIG. 4 is a structural schematic view of the environment-friendly sewage treatment equipment Figure 3 at A; Figure 5 FIG. 5 is a structural schematic view of the membrane filter (the movable seat is located at the lower limit position) of the environment-friendly sewage treatment equipment; Figure 6 Structure diagram of the B part in the present environment-friendly sewage treatment equipment Figure 5 Figure 7 Structure diagram of the C part in the present environment-friendly sewage treatment equipment Figure 5 Figure 8 Structure diagram of the E-E part in the present environment-friendly sewage treatment equipment Figure 7 Figure 9 Structure diagram of the function ring part in the present environment-friendly sewage treatment equipment Figure 10 Structure diagram of the function ring part in the present environment-friendly sewage treatment equipment Figure 11 Structure diagram of the D-D part in the present environment-friendly sewage treatment equipment Figure 3 Figure 12 Structure diagram of the top surface of the rotating disc in the present environment-friendly sewage treatment equipment

[0017] In the figure: 101, filter tank; 102, first filter; 103, second filter; 104, anaerobic reaction box; 105, aerobic reaction box; 106, membrane filter; 107, cleaning box; 108, movable water guide pipe; 109, grid; 1010, first pipeline; 1011, second pipeline; 1012, third pipeline; 1013, fourth pipeline; 1014, fifth pipeline; 1015, lifting cylinder; 1061, first limiting ring; 1071, water inlet pipe; 1071, water outlet pipe; 1081, sixth pipeline; 1, movable seat; 2, membrane wire; 3, first flow-through rod; 4, second flow-through rod; 5, rotating disc; 6, base; 7, function ring; 8, third flow-through rod; 9, first sealing plate; 10, support; 11, second limiting ring; 12, top rod; 13, first elastic member; 14, sliding block; 15, guide sleeve; 16, third elastic member; 17, seventh pipeline; 18, connecting rod; 19, push plate; 31, isolation plate; 41, third limiting ring; 51, combination groove; 71, flow channel; 72, rotating plate; 73, eighth pipeline; 74, fixed block; 75, isolation block; 76, moving block; 77, fourth elastic member; 91, flow-through hole; 92, second sealing plate; 93, second elastic member; 94, guide rod; 95, grid plate; 96, through hole; 141, extension rod; 142, guide block. DETAILED DESCRIPTION

[0018] ​​​​The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0019] Referring to Figures 1-2 The present application discloses an environment-friendly sewage treatment equipment, which comprises a filter tank 101, a first filter 102, a second filter 103, an anaerobic reaction tank 104, an aerobic reaction tank 105 and a membrane filter 106, and the filter tank 101, the first filter 102, the second filter 103, the anaerobic reaction tank 104, the aerobic reaction tank 105 and the membrane filter 106 are sequentially connected and communicated. The water outlet of the filter tank 101 is communicated with the water inlet of the first filter 102, the first filter 102 and the second filter 103 are communicated through a first pipeline 1010, the second filter 103 and the anaerobic reaction tank 104 are communicated through a second pipeline 1011, the anaerobic reaction tank 104 and the aerobic reaction tank 105 are communicated through a third pipeline 1012, and the aerobic reaction tank 105 and the membrane filter 106 are communicated through a fourth pipeline 1013. The sewage is sequentially filtered through the filter tank 101, the first filter 102, the second filter 103, the anaerobic reaction tank 104, the aerobic reaction tank 105 and the membrane filter 106, so that the sewage is subjected to multi-stage treatment such as filtration, anaerobic treatment, aerobic treatment and membrane filtration, and clean water is obtained.

[0020] Specifically, the filter tank 101 is internally provided with a grid 109, which is used for removing suspended matters and floating matters with large sizes in the sewage, 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 two-stage filtration, remove residual fine suspended particles, colloidal substances, part of dissolved organic matters and chroma in the sewage after the pretreatment of the grid, and provide good water inlet conditions for the subsequent biological treatment unit.

[0021] The sewage is subjected to hydrolysis, acidification and methanation of high-molecular organic pollutants in the sewage under an anaerobic or anoxic environment of the anaerobic reaction tank 104, dominated by facultative bacteria and anaerobic bacteria, so that the macromolecular organic matters are effectively degraded, the biodegradability of the sewage is improved, and part of the organic load is removed. The aerobic reaction tank 105 is connected with the anaerobic treatment, and utilizes the metabolism of aerobic microorganisms (including bacterial aggregates and nitrifying bacteria) to completely oxidize and decompose small-molecular organic matters generated in the anaerobic stage and pollutants such as ammonia nitrogen in the sewage into stable substances such as carbon dioxide, water and nitrate, so that the chemical oxygen demand (COD) in the sewage is removed, ammonia nitrogen nitrification is realized, and the potential of eutrophication of the water body is reduced.

[0022] The membrane filter 106 adopts mabr membrane filaments for filtering, and can efficiently intercept active sludge flocs, suspended particles, bacteria and most viruses remaining in the effluent of the aerobic reaction tank 105, so as to obtain clean water. Figure 3 The membrane filter 106 is internally provided with a movable seat 1, and the lower part of the movable seat 1 is provided with a plurality of U-shaped membrane filaments 2, both ends of the membrane filaments 2 are fixedly connected to the movable seat 1 and communicate with the inside of the movable seat 1. The top of the movable seat 1 is connected with a movable water guide pipe 108, the lower end of the movable water guide pipe 108 is connected to the movable seat 1 and communicates with the inside of the movable seat 1, and the upper end of the movable water guide pipe 108 extends out of the inside of the membrane filter 106 and is connected with a sixth pipeline 1081, which is a hose. Water enters the membrane filter 106 from the fourth pipeline 1013, passes through the membrane filaments 2, and then obtains clean water, which enters the inside of the movable seat 1 and is finally discharged from the membrane filter 106 through the movable water guide pipe 108 and the sixth pipeline 1081.

[0023] The bottom of the membrane filter 106 is provided with a cleaning tank 107, the bottom of the membrane filter 106 communicates with the top of the cleaning tank 107, and the cleaning tank 107 is used for cleaning the membrane filaments 2. The environment-friendly sewage treatment equipment further comprises a lifting cylinder 1015, the axis of the lifting cylinder 1015 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 with the membrane filter 106 in the vertical direction, the lifting cylinder 1015 is used for driving the movable water guide pipe 108 to move, so as to realize the movement of the movable seat 1 and the membrane filaments 2 between the membrane filter 106 and the cleaning tank 107, and the movable seat 1 can move between an upper limit position and a lower limit position.

[0024] During the movement of the movable water guide pipe 108, part of the movable water guide pipe 108 will enter the inside of the membrane filter 106, therefore, the top of the membrane filter 106 in the embodiment is provided with an annular brush, which is sleeved on the outside of the movable water guide pipe 108 and is used for cleaning the outside of the movable water guide pipe 108.

[0025] Further, the lower part of the movable seat 1 is fixedly provided with a first flow-through rod 3, the first flow-through rod 3 is located at the center position of the movable seat 1, and the first flow-through rod 3 is coaxially arranged with the movable seat 1. The upper part of the first flow-through rod 3 extends into the inside of the movable seat 1, and the lower part of the first flow-through rod 3 extends below the membrane filaments 2, and the first flow-through rod 3 is used for guiding the water flow. Figure 11, the membrane filaments 2 are arranged in a ring around the first flow rod 3. The first flow rod 3 is fixedly provided with a separation plate 31, which is located below the membrane filaments 2. When the movable seat 1 is located at the upper limit position, i.e. the membrane filaments 2 are located inside the membrane filter 106, the separation plate 31 is located between the membrane filter 106 and the cleaning box 107, the upper surface of the separation plate 31 is attached to the top of the cleaning box 107, and the separation plate 31 forms a seal between the membrane filter 106 and the cleaning box 107. At this time, a relatively sealed filtering space is formed inside the membrane filter 106.

[0026] The bottom of the cleaning box 107 is provided with a base 6, and the second flow rod 4 is arranged 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 in the inside of the first flow rod 3 and forms a sliding seal connection therebetween, and the second flow rod 4 is in communication with the first flow rod 3.

[0027] Further, referring to Figure 3 and Figure 7 , the bottom of the cleaning box 107 is provided with a rotating disc 5 and a base 6, and the rotating disc 5 is rotatably connected with the base 6. The rotating disc 5 is coaxially arranged with the second flow rod 4, and the second flow rod 4 passes through the center hole of the rotating disc 5. The upper surface of the rotating disc 5 is provided with an upper combining surface, and the lower surface of the separation plate 31 is a lower combining surface. When the movable seat 1 is located at 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 filaments 2 are located inside the cleaning box 107. At this time, the lower surface of the separation plate 31 is in contact with the upper surface of the rotating disc 5, and the separation plate 31 and the rotating disc 5 form a static friction combination and can rotate synchronously.

[0028] In this embodiment, the bottom of the movable seat 1 is provided with a second limiting ring 11, which is rotatably connected with the movable seat 1. The bottom of the membrane filter 106 is provided with a first limiting ring 1061, which is located between the membrane filter 106 and the cleaning box 107. The first limiting ring 1061 is used for limiting the second limiting ring 11, and the second limiting ring 11 of the movable seat 1 is in contact with the first limiting ring 1061, forming a contact seal, thereby realizing the sealing between the membrane filter 106 and the cleaning box 107.

[0029] In this embodiment, the second flow rod 4 penetrates the rotating disc 5, and referring to Figure 12 , the top of the rotating disc 5 is provided with a combining groove 51, which is located outside the second flow rod 4, and the combining groove 51 is used for accommodating the lower end of the first flow rod 3.

[0030] Further, the inside of the base 6 is fixedly provided with a functional ring 7, and referring to Figure 8The function ring 7 is coaxially arranged with the second flow rod 4. The inside of the function ring 7 is an annular flow channel 71, and the lower part of the second flow rod 4 is communicated with the annular flow channel 71 in the inside of the function ring 7 through a seventh pipeline 17 which is a hose. The top of the function ring 7 is provided with a rotating plate 72 which is coaxially arranged with the function ring 7 and forms a rotating sealing connection with the function ring 7. The rotating plate 72 is fixedly connected to the rotating disc 5 through a connecting rod 18.

[0031] With reference to Figure 8 The inside of the flow channel 71 is provided with a fixed block 74 and a moving block 76. The fixed block 74 is fixedly connected to the function ring 7, and the moving block 76 is slidingly connected to the function ring 7 and can move in the inside of the flow channel 71. An isolation block 75 and a fourth elastic member 77 are arranged between the fixed block 74 and the moving block 76. The isolation block 75 is used to isolate the fixed block 74 and the moving block 76, so that the fixed block 74 and the moving block 76 form a water inlet space which is communicated with the seventh pipeline 17. One end of the fourth elastic member 77 is fixedly connected to the fixed block 74, and the other end of the fourth elastic member 77 is fixedly connected to the moving block 76. The fourth elastic member 77 is in a tension state, so that the moving block 76 has a tendency to move close to the fixed block 74. When the moving block 76 is in contact with the isolation block 75, the moving block 76 is located at a first position.

[0032] The upper part of the moving block 76 is fixedly connected to the rotating plate 72. After water in the seventh pipeline 17 enters the water inlet space, the water pressure can push the moving block 76 to move in the inside of the flow channel 71, so as to form a forward rotating action of the rotating plate 72. The function ring 7 is further connected with an eighth pipeline 73 which is communicated with the flow channel 71 and is used for draining water in the flow channel 71. When the moving block 76 moves to be in contact with the fixed block 74, the moving block 76 is located at a second position. At this time, the eighth pipeline 73 is communicated with the seventh pipeline 17 through the flow channel 71, and the water in the inside of the flow channel 71 can be directly drained from the eighth pipeline 73. The water pressure in the inside of the flow channel 71 decreases, and the moving block 76 is reset under the action of the fourth elastic member 77, so as to form a reverse rotating action of the rotating plate 72.

[0033] The rotating plate 72 can form a reciprocating rotating action, and the rotating disc 5 rotates following the rotating plate 72 and also performs a reciprocating rotating action. In the embodiment, the movable water guide pipe 108 is rotatably connected with the movable seat 1, and the movable seat 1 can rotate in the inside of the membrane filter 106. When the isolation plate 31 is in contact with the rotating disc 5, the isolation plate 31, the first flow rod 3 and the movable seat 1 can all produce a reciprocating rotating action. When the movable seat 1 performs a reciprocating rotating action, the membrane filaments 2 produce a centrifugal action, and the membrane filaments 2 are dispersed, which is beneficial to the discharge of impurities between the membrane filaments 2.

[0034] In the embodiment, the upper part of the cleaning box 107 is provided with a water inlet pipe 1071, and the lower part of the cleaning box 107 is provided with a water outlet pipe 1072, so as to realize water inlet and water outlet in the cleaning box 107. When the membrane filaments 2 are cleaned, the cleaning box 107 needs to be filled with water, and the membrane filaments 2 can float in the water, so as to facilitate the stretching of the membrane filaments 2.

[0035] In the embodiment, the bottom of the membrane filter 106 is communicated with a fifth pipeline 1014, and the fifth pipeline 1014 is used for water outlet. When the membrane filaments 2 need to be backwashed, the movable water guide pipe 108 can be filled with water, the backwashing water enters the membrane filaments 2 from the movable seat 1, the backwashing of the membrane filaments 2 is realized, and the backwashing water can be discharged from the fifth pipeline 1014.

[0036] In the embodiment, referring to Figure 4 , the inside of the movable seat 1 is provided with a third flow-through rod 8, the third flow-through rod 8 is coaxially arranged with the first flow-through rod 3, the upper end of the third flow-through rod 8 is communicated with the movable water guide pipe 108, the lower end of the third flow-through rod 8 is opposite to the upper end of the first flow-through rod 3 and has a gap, and the water in the third flow-through rod 8 enters the inside of the movable seat 1 from the gap. The inside of the third flow-through rod 8 is fixedly provided with a bracket 10, the bracket 10 is composed of a rod member, and does not affect the flow of water in the third flow-through rod 8. The top of the first flow-through rod 3 is provided with a first sealing plate 9, the first sealing plate 9 is connected with the bracket 10 through a first elastic member 13, the first elastic member 13 is in a compressed state, and the first elastic member 13 is used for pressing the first sealing plate 9, so that the first sealing plate 9 is located on the upper end face of the first flow-through rod 3 and seals the upper end face of the first flow-through rod 3.

[0037] The middle part of the first sealing plate 9 is provided with a flow-through hole 91, the bottom of the first sealing plate 9 is provided with a second sealing plate 92, and the second sealing plate 92 is used for sealing the flow-through hole 91. The top of the first sealing plate 9 is fixedly provided with a mesh plate 95, the mesh plate 95 covers the flow-through hole 91, and the second sealing plate 92 is connected to the mesh plate 95 through a second elastic member 93. The second elastic member 93 is in a stretched state, so that the second sealing plate 92 is tightly attached to the first sealing plate 9, and the sealing state of the flow-through hole 91 is maintained. The second sealing plate 92 is fixedly connected with a guide rod 94, the guide rod 94 is slidably connected with the mesh plate 95, and the possibility of bending and twisting of the second elastic member 93 is reduced.

[0038] In the embodiment, the diameter size of the second sealing plate 92 is greater than the diameter size of the flow-through hole 91, and the diameter size of the second sealing plate 92 is less than the inner hole diameter size of the second flow-through rod 4. The lower part of the bracket 10 is fixedly connected with a jacking rod 12, the mesh plate 95 is provided with a through hole 96, and the through hole 96 is used for accommodating the jacking rod 12 to pass through. When the movable seat 1 is located at the lower limit position, referring to Figure 6, the second flow-through rod 4 can push the first sealing plate 9 to move upwards, the first sealing plate 9 is away from the first flow-through rod 3 and contacts with the lower end of the third flow-through rod 8, the top rod 12 can push the second sealing plate 92 to separate from the first sealing plate 9, and the flow-through hole 91 is opened. In the embodiment, the diameter of the top rod 12 is smaller than the diameter of the flow-through hole 91, so that the flow-through hole 91 has the flow-through capacity. At this time, the third flow-through rod 8 is communicated with the second flow-through rod 4, and the water entering from the third flow-through rod 8 can enter the flow channel 71 of the functional ring 7 through the second flow-through rod 4 and the seventh pipeline 17, so that the reciprocating rotation of the rotating disc 5 is realized.

[0039] Further, referring to Figure 7 , the base 6 is internally fixedly provided with a guide sleeve 15, and the bottom of the second flow-through rod 4 is connected with a sliding block 14 which is slidingly connected with the base 6 through the guide sleeve 15. A third elastic member 16 is arranged between the sliding block 14 and the base 6, and the third elastic member 16 is in an extended state, so that the sliding block 14 has a tendency to move upwards. The second flow-through rod 4 is externally provided with a third limiting ring 41 which is located below the rotating disc 5 and is used for limiting the upward movement of the second flow-through rod 4. In the embodiment, the supporting force of the third elastic member 16 on the second flow-through rod 4 is greater than the supporting force of the first elastic member 13 on the first sealing plate 9.

[0040] Referring to Figure 9 and 10 , the sliding block 14 is fixedly connected with a guide block 142 through an extension rod 141, and the guide block 142 has a guide inclined surface. A push plate 19 is fixedly arranged on the rotating plate 72 and can rotate with the rotating plate 72. When the moving block 76 approaches the second position, the push plate 19 can contact the guide inclined surface of the guide block 142 and push the guide block 142 to move, so that the second flow-through rod 4 generates downward axial movement, the first sealing plate 9 is separated from the end surface of the third flow-through rod 8, the complete communication state between the third flow-through rod 8 and the second flow-through rod 4 is broken, the water pressure of the flow channel 71 inside the functional ring 7 is reduced, and the moving block 76 is facilitated to return to the original position. At the same time, the third flow-through rod 8 is communicated with the internal space of the movable seat 1, and water can enter the inside of the membrane wire 2 through the movable seat 1, so that the backwashing of the membrane wire 2 is realized. That is, the backwashing of the membrane wire 2 can be performed during the dispersion process, and the impurities on the surface of the membrane wire 2 are facilitated to be separated.

[0041] When the membrane wire 2 is cleaned, the lifting cylinder 1015 can drive the movable water guide pipe 108 to move upwards, the movable seat 1 returns to the upper limit position, and the filtering work is continued, so that the automatic conversion between the filtering state and the cleaning state of the membrane wire 2 is realized.

[0042] The membrane filter 106 of the environment-friendly sewage treatment equipment has the following working process: (1) The membrane filter 106 is in the filtering state The sewage is sequentially filtered by the filtering tank 101, the first filter 102, the second filter 103, the anaerobic reaction tank 104, the aerobic reaction tank 105 and the membrane filter 106. The filtering tank 101 removes the suspended matters and floating matters with large sizes in the water. The first filter 102 and the second filter 103 filter the sewage. The anaerobic reaction tank 104 hydrolyzes, acidizes and methanizes the high-molecular organic pollutants in the sewage. The aerobic reaction tank 105 removes the chemical oxygen demand (COD) in the sewage and realizes the nitrification of ammonia nitrogen. The membrane filter 106 filters the sewage to obtain clean water.

[0043] In the above process, the movable seat 1 of the membrane filter 106 is located at the upper limit position, i.e. the membrane filaments 2 are located inside the membrane filter 106, the isolation plate 31 is located between the membrane filter 106 and the cleaning tank 107, the upper surface of the isolation plate 31 is attached to the top of the cleaning tank 107, and the isolation plate 31 forms a seal between the membrane filter 106 and the cleaning tank 107. At this time, water enters the filtering space inside the membrane filter 106 from the fourth pipeline 1013, passes through the membrane filaments 2 to obtain clean water, and the clean water enters the inside of the movable seat 1 and is finally discharged from the membrane filter 106 through the movable water guide pipe 108 and the sixth pipeline 1081.

[0044] (II) The membrane filter 106 is in the backwashing state The cleaning water enters the movable seat 1 from the movable water guide pipe 108, and then enters the membrane filaments 2 to realize the backwashing of the membrane filaments 2. The backwashing water can be discharged through the fifth pipeline 1014.

[0045] (III) The membrane filter 106 is in the membrane filament cleaning state The lifting cylinder 1015 drives the movable water guide pipe 108 and the movable seat 1 to move downward, the second flow-through rod 4 moves upward relative to the first flow-through rod 3, the top of the second flow-through rod 4 pushes the first sealing plate 9 to move upward, and when the movable seat 1 is located at the lower limit position, the movable seat 1 is located between the membrane filter 106 and the cleaning tank 107, the membrane filter 106 is sealed with the cleaning tank 107, the membrane filaments 2 are located inside the cleaning tank 107, the lower surface of the isolation plate 31 is in contact with the upper surface of the rotating disc 5, and a static friction is formed between the isolation plate 31 and the rotating disc 5; at the same time, the first sealing plate 9 is separated from the first flow-through rod 3 and is in contact with the lower end of the third flow-through rod 8, the top rod 12 limits 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-through hole 91 is opened, and the third flow-through rod 8 and the second flow-through rod 4 are in a communication state; In the cleaning tank 107 needs to be full of water, the membrane silk 2 can float in the water, the third flow through rod 8 is communicated with the clean water, the water can pass through the second flow through rod 4, the seventh pipeline 17 and enter the flow channel 71 of the functional ring 7, 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, and the positive rotation action of the rotating plate 72 is formed;When the moving block 76 moves to the second position, the eighth pipeline 73 is communicated with the seventh pipeline 17 through the flow channel 71, and the water in the flow channel 71 can be directly discharged from the eighth pipeline 73, the water pressure in the flow channel 71 is reduced, the moving block 76 is reset under the action of the fourth elastic member 77, the reverse rotation action of the rotating plate 72 is formed, the reciprocating rotation action of the rotating disc 5 is realized, the isolation plate 31, the first flow through rod 3 and the movable seat 1 can generate the reciprocating rotation action, when the movable seat 1 generates the reciprocating rotation action, the membrane silk 2 generates the centrifugal action, the membrane silk 2 is dispersed, and it is beneficial to the discharge of impurities between the membrane silks 2. In the process that the moving block 76 approaches the second position, the push plate 19 can contact the guide inclined surface of the guide block 142 and push the guide block 142 to move, so that the second flow through rod 4 generates the downward axial movement, the first sealing plate 9 is separated from the end surface of the third flow through rod 8, the complete communication state between the third flow through rod 8 and the second flow through rod 4 is disconnected, the water pressure of the flow channel 71 inside the functional ring 7 is reduced, which is beneficial to the reset of the moving block 76, at the same time, the third flow through rod 8 is communicated with the internal space of the movable seat 1, the water can enter the inside of the membrane silk 2 through the movable seat 1, the backwashing of the membrane silk 2 is realized, that is, the backwashing of the membrane silk 2 can be carried out in the process that the membrane silk 2 rotates in the reverse direction, and the membrane silk 2 is backwashed in the dispersion process, which is beneficial to the separation of impurities on the surface of the membrane silk 2.

[0046] After the membrane silk 2 is cleaned, the lifting cylinder 1015 can drive the movable water guide pipe 108 to move upwards, the movable seat 1 returns to the upper limit position, and the filtering work is continued, so that the automatic conversion between the filtering work state and the cleaning state of the membrane silk 2 is realized.

[0047] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An environmentally friendly sewage treatment apparatus comprising a filter tank, a first filter, a second filter, an anaerobic reaction tank, an aerobic reaction tank, and a membrane filter which are sequentially connected, characterized in that, The bottom of the membrane filter is provided with a cleaning box in communication with the membrane filter, and the cleaning box is used for cleaning the membrane filaments; The inside of the membrane filter is provided with a movable seat, the upper part of the movable seat is in axial sliding connection with the membrane filter through a movable water guide pipe, the membrane filaments are installed on the lower part of the movable seat, the lower part of the movable seat is provided with a first flow-through rod, the membrane filaments are arranged in a ring around the first flow-through rod, and the bottom of the cleaning box is rotationally connected with a rotating disc, and the rotating disc is coaxially arranged with the first flow-through rod; The first flow-through rod is fixedly provided with a partition plate, when the movable seat is located at the upper limit position, the partition 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 filaments are located in the inside of the membrane filter; when the movable seat is located at 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 partition plate contacts the upper surface of the rotating disc to form a static friction combination between the rotating disc, and the membrane filaments are located in the inside of the cleaning box.

2. The environmentally friendly sewage treatment equipment according to claim 1, characterized in that, The bottom of the cleaning box is provided with a second flow-through rod and a functional ring, the upper part of the second flow-through rod is coaxially sleeved in the inside of the first flow-through rod and is in sliding seal connection with the first flow-through rod, the upper end of the first flow-through rod is used for communicating with the movable water guide pipe, the lower part of the second flow-through rod is in communication with an annular flow channel in the inside of the functional ring through a seventh pipeline, the functional ring is fixedly connected to the base of the cleaning box, the top of the functional ring is coaxially rotationally connected with a rotating plate, and the rotating plate is fixedly connected with the rotating disc; The inside of the flow channel is provided with a fixed block and a moving block, the fixed block and the moving block are provided with a partition block and a fourth elastic piece therebetween, a water inlet space between the fixed block and the moving block is in communication with the seventh pipeline, and the moving block is fixedly connected to the rotating plate; the water flow in the water inlet space is used to push the moving block to move to form the rotation of the rotating plate.

3. The environmentally friendly sewage treatment equipment according to claim 2, characterized in that, The inside of the movable seat is provided with a third flow-through rod for communicating with the movable water guide pipe, the third flow-through rod is coaxially arranged with the first flow-through rod, and the lower end of the third flow-through rod has a gap with the upper end of the first flow-through rod; The inside of the third flow-through rod is fixedly provided with a support and a top rod, the top of the first flow-through rod is provided with a first sealing plate, the first sealing plate is connected with the support through a first elastic piece, the middle part of the first sealing plate is provided with a flow-through hole, and the bottom of the first sealing plate is elastically connected with a second sealing plate for sealing the flow-through hole; when the movable seat is located at the lower limit position, the top rod is used to push the second sealing plate to separate from the first sealing plate to form the opening of the flow-through hole.

4. The environmentally friendly sewage treatment equipment according to claim 3, characterized in that, The diameter size of the second sealing plate is greater than the diameter size of the flow-through hole, and the diameter size of the second sealing plate is less than the inner hole diameter size of the second flow-through rod.

5. The environmentally friendly sewage treatment equipment according to claim 4, characterized in that, The bottom of the second flow-through rod is provided with a sliding block which is slidingly connected with the base through a guide sleeve, a third elastic member is arranged between the sliding block and the base, the sliding block is fixedly connected with a guide block which has a guide inclined surface, a push plate is fixedly arranged on the rotating plate and is used for contacting the guide inclined surface of the guide block and pushing the guide block to move to form the axial movement of the second flow-through rod and realize the separation of the first sealing plate and the end surface of the third flow-through rod.

6. The environmentally friendly sewage treatment equipment according to claim 5, characterized in that, The second flow-through rod is externally provided with a third limiting ring which is located below the rotating disc.

7. The environmentally friendly sewage treatment equipment according to any one of claims 1-6, characterized in that, The bottom of the membrane filter is communicated with a fourth pipeline for water inlet and a fifth pipeline for backwash water outlet.

8. The environmentally friendly sewage treatment equipment according to any one of claims 1-6, 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.

9. The environmentally friendly sewage treatment equipment according to any one of claims 1-6, characterized in that, A lifting cylinder is further included, the axis of the lifting cylinder is vertically arranged, and the working end of the lifting cylinder is connected to the movable water guide pipe.

10. The environmentally friendly sewage treatment equipment according to any one of claims 1-6, characterized in that, The top of the rotating disc is provided with a combination groove for accommodating the lower end of the first flow-through rod.

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