Filter based on multi-layer composite membrane and filtering method thereof

Abstract

The invention belongs to the technical field of filtering, and discloses a filter based on a multi-layer composite membrane and a filtering method thereof.The filter comprises a shell and a filter membrane mechanism, an assembly frame is movably connected into the shell in a sleeved mode, the filter membrane mechanism is movably installed in the assembly frame, a treatment frame is fixedly connected to the bottom of the shell, and the treatment frame is fixedly connected to the bottom of the shell. A flushing part is fixedly mounted on the outer side of the treatment frame, and a distribution assembly is fixedly mounted at the bottom of the treatment frame. The composite power assembly is used for controlling gas to be input into the assembling frame, vertical vibration of the filter membrane mechanism in the assembling frame is achieved, vibration treatment of the filter membrane mechanism is achieved in the filtering treatment process, it is avoided that filtered matter is accumulated at the first position of a filter membrane in a concentrated mode in the filtering process, distribution of the filtered matter on the filter membrane is uniform through self-vibration treatment, and the filtering efficiency is improved. Pressure rise caused by local accumulation is avoided, the filtering stability of the filter membrane mechanism is improved, meanwhile, the structural stability in the filtering process is improved, and filter membrane damage caused by too large filtering pressure is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of filtration, and specifically relates to a filter based on a multi-layer composite membrane and a filtration method thereof. Background Art

[0002] A filter based on a multi-layer composite membrane is an efficient filtering device, which is widely used in fields such as water treatment, air purification, medicine, and food processing. Its core feature is to achieve efficient filtration of pollutants with different particle sizes and properties through a multi-layer composite membrane structure of different materials.

[0003] In the existing filters based on multi-layer composite membranes, during use, due to the uneven distribution of impurities in the liquid to be filtered, when filtering for a long time, solid impurities in some of the filtered liquid accumulate in specific areas of the filter membrane, increasing the pressure and reducing the structural strength of the filter membrane. At the same time, for the filtered filter membrane, a large amount of filtered matter accumulates on the actual side, reducing the channel area and increasing the filtration pressure. Regular cleaning is required. However, the current backwashing effect is generally average. Especially for multiple groups of filter membranes of true poison multi-layer composite membranes, a large amount of filtered matter still remains in the areas between the individual filter membranes during backwashing, making it difficult to effectively clean all the filter membranes comprehensively, and the use effect is not good. Summary of the Invention

[0004] The purpose of the present invention is to provide a filter based on a multi-layer composite membrane and a filtration method thereof to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A filter based on a multi-layer composite membrane and a filtration method thereof, including a housing and a filter membrane mechanism. An assembly frame is movably sleeved inside the housing, the filter membrane mechanism is movably installed in the assembly frame, a treatment frame is fixedly connected to the bottom of the housing, a flushing part is fixedly installed on the outside of the treatment frame, a distribution component is fixedly installed at the bottom of the treatment frame, a rotating commutation component is rotatably installed inside the distribution component, a liquid supply mechanism is fixedly provided at the bottom of the treatment frame, the liquid supply mechanism inputs cleaning liquid into the rotating commutation component, a conduction pipe is fixedly connected and communicated between the housing and the distribution component, a pressure valve is provided at the inner end of the conduction pipe, the distribution component is communicated with the flushing part, elastic components are provided on both the upper and lower surfaces of the filter membrane mechanism, and the elastic components are elastically connected in the assembly frame. A composite power assembly is fixedly provided at the top of the housing. The composite power assembly includes an air pump. The assembly frame includes an assembly cavity, a pneumatic cavity, and a bypass hole. The upper ends of a set of elastic components are fixedly connected to a movable plate. The air pump injects pressurized air into the pneumatic cavity, and pushes the movable plate located in the pneumatic cavity downward, and drives the filter membrane mechanism to move downward in the assembly cavity through the connected elastic components. After moving downward, the bypass hole is communicated with the pneumatic cavity and bypassed, and the elastic components drive the filter membrane mechanism to elastically reset, controlling the filter membrane mechanism to vibrate up and down in the assembly frame.

[0006] Preferably, the number of the filter membrane mechanisms is three. The three filter membrane mechanisms respectively correspond to a microfiltration membrane, an ultrafiltration membrane, and a nanofiltration membrane. The composite filtration treatment is completed in sequence through the microfiltration membrane, the ultrafiltration membrane, and the nanofiltration membrane. The filter membrane mechanism includes a connection frame and a filter membrane body fixed in the middle of the connection frame.

[0007] Preferably, the assembly frame further includes a frame body, an assembly port, and an air inlet hole. The assembly cavity and the pneumatic cavity are both opened in the frame body. The assembly port is opened on the side surface of the frame body, and the assembly port is communicated with the assembly cavity. The bypass hole is opened on the side surface of the frame body, and the bypass hole is communicated with the pneumatic cavity. The air inlet hole is opened on the top of the frame body, and the air inlet hole is communicated with the pneumatic cavity. The two elastic components are symmetrically distributed in the assembly cavity, and the filter membrane mechanism is sleeved in the assembly cavity.

[0008] Preferably, the composite power assembly includes a communication frame and an electric push rod. The communication frame is fixedly connected to the top of the assembly frame. The air pump is fixed on the top of the communication frame. The air outlet end of the air pump is communicated with the inside of the communication frame. The electric push rod is fixedly installed on the top of the housing, and the movable end is fixedly connected to the communication frame. The communication frame is communicated with the air inlet hole. A sealing rod is fixedly connected to the bottom surface of the communication frame. The lower end of the sealing rod passes through the top of the housing and is sleeved on the bottom of the housing. A sealing sleeve is provided at the bottom of the housing. A ring groove is opened on the outer side surface of the sealing rod, and the ring groove is located inside the housing.

[0009] Preferably, the flushing part includes a conduction frame, a flushing port, and a communication arm. The conduction frames are symmetrically nested on both sides of the processing frame. The flushing port is opened on the side surface of the conduction frame. The communication arm is fixedly connected to the outer side surface of the conduction frame and is communicated with the inside of the conduction frame. An operation port is opened on the outer side surface of the processing frame, and the operation port is located on the moving path of the assembly port.

[0010] Preferably, the distribution component includes a distribution base, an adaptation cavity, a reserved cavity, side ports, a front port, and a connecting pipe. The distribution base is fixedly connected to the bottom of the processing frame. The adaptation cavity and the reserved cavity are both opened inside the distribution base. The adaptation cavity and the reserved cavity are communicated. The side ports are symmetrically opened on both sides of the distribution base and are both communicated with the adaptation cavity. The outer ends of the side ports are communicated with the connecting arms. The front port is opened on the outer side surface of the distribution base and is located between the two groups of side ports. The front port is communicated with the conduction pipe. The connecting pipe is fixed to the end surface of the distribution base and is communicated with the reserved cavity. The liquid supply mechanism is communicated with the connecting pipe.

[0011] Preferably, the rotation and commutation component includes a distribution disc, a rotating shaft, a gear, and a liquid outlet channel. The distribution disc is rotatably sleeved in the adaptation cavity. One end of the rotating shaft passes through the distribution base and is fixedly connected to the distribution disc. The gear is fixedly sleeved on the outer surface of the rotating shaft. The liquid outlet channel is opened inside the distribution disc. One end thereof is located at the end surface of the distribution disc, and the other end is located on the circumferential surface of the outer side of the distribution disc. During rotation, the liquid outlet channel is independently communicated with the two side ports and the front port respectively. A push control part is fixedly provided at the bottom of the processing frame. The push control part includes a hydraulic push rod and a toothed plate. The hydraulic push rod drives the toothed plate to reciprocate horizontally. The toothed plate is meshed with the gear.

[0012] Preferably, the elastic component includes a movable rod, a push plate, and a spring. The movable rod is movably sleeved in the frame body, and one end of the movable rod is located in the assembly cavity. The push plate is fixedly connected to one end of the movable rod and is located at the end close to the filter membrane mechanism. One end of the spring is fixedly connected in the assembly cavity, and the other end is fixedly connected to the push plate.

[0013] Preferably, the movable plate is fixedly connected to the movable rod in the elastic component. The side through hole is located on the moving path of the movable plate. An air outlet hole is opened on the back surface of the housing. The air outlet hole is communicated with the side through hole.

[0014] A filtering method for a filter based on a multi-layer composite membrane includes the following filtering steps: The first step: As the mixed liquid to be filtered is input into the inner cavity of the housing, the liquid input from the left side sequentially passes through each group of filter membrane mechanisms in the housing to complete multi-layer filtering, and each filter residue is intercepted on the left side surface of each group of filter membrane mechanisms. The second step: Start the composite power component. The air pump inputs pressurized air into the interior of the assembly frame and causes the filter membrane mechanism to vibrate up and down, maintaining the vibration during the filtering process, so that the deposits attached to the filter membrane mechanism are dispersed. Step 3: When cleaning is required, stop the liquid input, start the composite power component again, drive the assembly frame to move downward, so that the filter membrane mechanism moves downward into the processing frame, start the external water pump, input clean water into the liquid supply mechanism and then into the rotation and commutation component, start the pushing control part, and make the rotation and commutation component rotate reciprocally; Step 4: When the rotation and commutation component is connected to the left side of the flushing part, the water flow flushes the left side of the filter membrane mechanism in the processing frame, and when the rotation and commutation component is connected to the right side of the flushing part, the water flow flushes the filter membrane mechanism reversely along the right side. At the same time, the composite power component controls the up and down movement of the filter membrane mechanism, so that the filter membrane mechanism moves up and down reciprocally in the processing frame, realizing the dynamic flushing of different areas of the filter membrane mechanism; Step 5: When the assembly frame moves downward for flushing, it drives the sealing rod to move downward at the same time, so that the lower end of the annular groove moves to the bottom of the housing, opening the bottom of the housing, so that the accumulated liquid on the left side of each group of assembly frames is discharged from the housing, and the impurities obtained by filtration in the accumulated liquid are discharged along with the liquid. And when the rotation and commutation component rotates and is connected to the front port, the flushing water is input into the left side of each group of assembly frames through the conduction pipe to flush the chamber in the left area and wash the attached particles on the inner wall clean.

[0015] The beneficial effects of the present invention are as follows: (1) By using the composite power component to control the gas input into the assembly frame and realizing the up and down vibration of the filter membrane mechanism in the assembly frame, during the filtration process, the vibration treatment of the filter membrane mechanism is realized, avoiding the concentrated accumulation of the filtered matter at one place of the filter membrane. Through its own vibration treatment, the distribution of the filtered matter on the filter membrane is made uniform, avoiding the pressure increase caused by local accumulation, improving the filtration stability of the filter membrane mechanism, and at the same time improving the structural stability during the filtration process, and avoiding the damage of the filter membrane caused by excessive filtration pressure.

[0016] (2) By using the distribution component, the rotation and commutation component and the flushing part, and cooperating with the composite power component to control the movement of the assembly frame, blocking the inside of the housing when moving the filter membrane mechanism, and cooperating with the continuous commutation and conduction on both sides of the flushing part, the commutation flushing of both sides of the filter membrane mechanism is completed. At the same time, cooperating with the composite power component to control the up and down movement of the assembly frame and the filter membrane mechanism, synchronously completing the commutation and the multi-angle dynamic flushing of the filter membrane, improving the cleaning effect of the filter membrane, and avoiding disassembly to achieve fast and effective flushing treatment, ensuring the maintenance of long-term filtration treatment.

[0017] (3) By utilizing the conduction of the distribution component, the rotation and commutation component, and the conduction tube, and cooperating with the sealing control of the sealing rod on the bottom of the housing, during the cleaning process, the filtrate in the filtration area is released and exported by opening the housing, avoiding the filtration substances from always accumulating in the filter housing. And in cooperation with the rinsing liquid after commutation, when the rinsing liquid is introduced into the conduction tube and the pressure valve is pushed open, the input rinsing of the rinsing water is realized, and the rinsing area inside the housing is fully rinsed, further improving self-cleaning and the full cleaning of the filtration chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic sectional view of the present invention; Figure 3 is a schematic connection diagram of the assembly frame and the composite power component of the present invention; Figure 4 is a schematic sectional view of the assembly frame and the composite power component of the present invention; Figure 5 is a schematic sectional view of the assembly frame and the filter membrane mechanism of the present invention; Figure 6 is a schematic position diagram of the filter membrane mechanism and the elastic component of the present invention; Figure 7 is a schematic bottom view of the processing frame of the present invention; Figure 8 is a schematic communication diagram of the rinsing part and the distribution component of the present invention; Figure 9 is an exploded schematic diagram of the rotation and commutation component and the distribution component of the present invention; Figure 10 is a schematic sectional view of the distribution component of the present invention; Figure 11 is a schematic diagram of the housing of the present invention.

[0019] In the figure: 1. Housing; 2. Assembly frame; 21. Frame body; 22. Assembly cavity; 23. Air pressure cavity; 24. Assembly port; 25. Side through hole; 26. Air inlet hole; 3. Filter membrane mechanism; 4. Composite power component; 41. Connecting frame; 42. Air pump; 43. Electric push rod; 5. Processing frame; 6. Rinsing part; 61. Conducting frame; 62. Rinsing port; 63. Connecting arm; 7. Distribution component; 71. Distribution seat; 72. Adaptation cavity; 73. Reserved cavity; 74. Side port; 75. Front port; 76. Connecting pipe; 8. Rotation and commutation component; 81. Distribution disc; 82. Rotating shaft; 83. Gear; 84. Liquid outlet flow channel; 9. Pushing control part; 10. Elastic component; 101. Movable rod; 102. Push plate; 103. Spring; 11. Liquid supply mechanism; 12. Conducting tube; 13. Operation port; 14. Air outlet hole; 15. Sealing rod; 16. Ring groove; 17. Movable plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 11 As shown, the embodiment of the present invention provides a filter based on a multi-layer composite membrane and a filtering method thereof, comprising a housing 1 and a filter membrane mechanism 3, wherein an assembly frame 2 is movably sleeved inside the housing 1, and the filter membrane mechanism 3 is movably installed in the assembly frame 2, a processing frame 5 is fixedly connected to the bottom of the housing 1, a flushing portion 6 is fixedly installed on the outside of the processing frame 5, a distribution component 7 is fixedly installed on the bottom of the processing frame 5, a rotating reversing component 8 is rotatably installed inside the distribution component 7, a liquid supply mechanism 11 is fixedly provided at the bottom of the processing frame 5, and the liquid supply mechanism 11 inputs the cleaning liquid into the rotating reversing component 8, a conducting pipe 12 is fixedly connected between the housing 1 and the distribution component 7, a pressure valve is provided at the inner end of the conducting pipe 12, and the distribution component 7 is connected to the flushing portion 6, and elastic components 10 are provided on the upper and lower surfaces of the filter membrane mechanism 3, and the elastic component 10 is elastically connected to the assembly frame 2, A composite power component 4 is fixedly provided on the top of the shell 1, and the composite power component 4 includes an air pump 42. The assembly frame 2 includes an assembly chamber 22, an air pressure chamber 23 and a bypass hole 25. A group of elastic components 10 are fixedly connected to the upper end with a movable plate 17. The air pump 42 injects pressurized air into the air pressure chamber 23, and pushes the movable plate 17 located in the air pressure chamber 23 to move downward, and drives the filter membrane mechanism 3 to move downward in the assembly chamber 22 through the connected elastic component 10. After moving downward, the bypass hole 25 is connected to the air pressure chamber 23 and bypasses, and the elastic component 10 drives the filter membrane mechanism 3 to elastically reset, and controls the filter membrane mechanism 3 to vibrate up and down in the assembly frame 2.

[0022] Embodiment 1: As the mixed liquid to be filtered is input into the inner cavity of the shell 1, the liquid input from the left side passes through each group of filter membrane mechanisms 3 in the shell 1 in turn to complete multi-layer filtration, and each filter material is retained on the left side surface of each group of filter membrane mechanisms 3; the composite power component 4 is started, and the air pump 42 inputs pressurized air into the connecting frame 41, and inputs it into the air pressure cavity 23 inside the assembly frame 2 along the air inlet 26, pushing the movable plate 17 to move downward, and compressing the elastic component 10 on the top of the filter membrane mechanism 3, and when the movable plate 17 moves, the bypass hole 25 is opened, and the pressurized air is discharged through the bypass hole 25 and the air outlet 14, and the spring 103 drives the movable plate 17 to move up and reset, so that the filter membrane mechanism 3 vibrates up and down in the assembly frame 2, and the vibration is maintained during the filtration, and the deposits attached to the filter membrane mechanism 3 are dispersed.

[0023] First, by using the composite power component 4 to control the gas input into the assembly frame 2 and realizing the up-and-down vibration of the filter membrane mechanism 3 in the assembly frame 2, during the filtration process, the vibration treatment of the filter membrane mechanism 3 is realized, avoiding the concentrated accumulation of the filtered matter at one place on the filter membrane. Through its own vibration treatment, the distribution of the filtered matter on the filter membrane is made uniform, avoiding the pressure increase caused by local accumulation, improving the filtration stability of the filter membrane mechanism 3, and at the same time improving the structural stability during the filtration process, avoiding the damage of the filter membrane caused by excessive filtration pressure.

[0024] Embodiment 2: When cleaning is required, stop the input of the filtered liquid, start the composite power component 4 again, drive the assembly frame 2 to move downward, so that the filter membrane mechanism 3 moves down into the treatment frame 5, start the external water pump, input the cleaning water into the liquid supply mechanism 11, and then into the reserved cavity 73 of the distribution component 7, and then into the liquid outlet channel 84 in the rotation and commutation component 8. Start the push control part 9, the toothed plate drives the engaged gear 83 to rotate, so that the rotation and commutation component 8 rotates reciprocally. When the liquid outlet channel 84 in the rotation and commutation component 8 is communicated with the side port 74 on the left side of the flushing part 6, the water flow flushes the left side of the filter membrane mechanism 3 in the treatment frame 5, and when the rotation and commutation component 8 is communicated with the side port 74 on the right side of the flushing part 6, the water flow flushes the filter membrane mechanism 3 reversely along the right side. At the same time, the composite power component 4 controls the up-and-down movement of the filter membrane mechanism 3, so that the filter membrane mechanism 3 moves up and down reciprocally in the treatment frame 5, realizing the dynamic flushing of different areas of the filter membrane mechanism 3; and when the assembly frame 2 moves down for flushing, it also drives the sealing rod 15 to move downward, so that the lower end of the annular groove 16 on the sealing rod 15 moves to the bottom of the housing 1, conducting the bottom of the housing 1, so that the accumulated liquid on the left side of each assembly frame 2 is discharged from the housing 1, and the impurities filtered out in the accumulated liquid are discharged along with the liquid. And when the rotation and commutation component 8 rotates and is communicated with the front port 75, the flushing water is input into the conduction pipe 12, and the pressure valve is opened under the extrusion of the water pressure, so that the flushing water is input into the left side of each assembly frame 2, flushing the filtration chamber in the left side area and flushing the attached particles on the inner wall clean.

[0025] First, by using the distribution component 7, the rotation and commutation component 8 and the flushing part 6, cooperating with the composite power component 4 to control the movement of the assembly frame 2, blocking the inside of the housing 1 when moving the filter membrane mechanism 3, and cooperating with the continuous switching conduction on both sides of the flushing part 6, completing the commutation flushing of both sides of the filter membrane mechanism 3. At the same time, cooperating with the composite power component 4 to control the up-and-down movement of the assembly frame 2 and the filter membrane mechanism 3, synchronously completing the commutation and the dynamic flushing of multiple angles of the filter membrane, improving the cleaning effect of the filter membrane, and realizing the fast and effective flushing treatment without disassembly, ensuring the maintenance of the long-term filtration treatment.

[0026] In addition, by utilizing the conduction of the distribution component 7, the rotation commutation component 8, and the conduction pipe 12, and cooperating with the sealing control of the bottom of the housing 1 by the sealing rod 15, during the cleaning process, by opening the housing 1, the filtrate in the filtration area is released and exported, avoiding the filtration matter from always accumulating in the filtration housing 1. Moreover, in cooperation with the rinsing liquid after commutation, when the rinsing liquid is introduced into the conduction pipe 12 and the pressure valve is pushed open, the input rinsing of the rinsing water is realized, and the internal rinsing area of the housing 1 is fully rinsed, further improving self-cleaning and fully cleaning the filtration chamber.

[0027] Among them, the number of the filter membrane mechanisms 3 is three groups. The three groups of filter membrane mechanisms 3 correspond to the microfiltration membrane, the ultrafiltration membrane, and the nanofiltration membrane respectively. The composite filtration treatment is completed in sequence through the microfiltration membrane, the ultrafiltration membrane, and the nanofiltration membrane. The filter membrane mechanism 3 includes a connecting frame and a filter membrane body fixed in the middle of the connecting frame.

[0028] The three groups of microfiltration membranes, ultrafiltration membranes, and nanofiltration membranes respectively achieve different levels of filtration treatment, realizing the enhanced filtration operation after the composite treatment.

[0029] Among them, the assembly frame 2 further includes a frame body 21, an assembly port 24, and an air inlet hole 26. The assembly cavity 22 and the air pressure cavity 23 are both opened in the frame body 21. The assembly port 24 is opened on the side of the frame body 21, and the assembly port 24 communicates with the assembly cavity 22. The side through hole 25 is opened on the side of the frame body 21, and the side through hole 25 communicates with the air pressure cavity 23. The air inlet hole 26 is opened on the top of the frame body 21, and the air inlet hole 26 communicates with the air pressure cavity 23. The two elastic components 10 are symmetrically distributed in the assembly cavity 22. The filter membrane mechanism 3 is sleeved in the assembly cavity 22. Among them, the elastic component 10 includes a movable rod 101, a push plate 102, and a spring 103. The movable rod 101 is movably sleeved in the frame body 21, and one end of the movable rod 101 is located in the assembly cavity 22. The push plate 102 is fixedly connected to one end of the movable rod 101 and is located at one end close to the filter membrane mechanism 3. One end of the spring 103 is fixedly connected in the assembly cavity 22, and the other end is fixedly connected to the push plate 102. The movable plate 17 is fixedly connected to the movable rod 101 in the elastic component 10. The side through hole 25 is located on the moving path of the movable plate 17. An air outlet hole 14 is opened on the back of the housing 1, and the air outlet hole 14 communicates with the side through hole 25.

[0030] The assembly frame 2 realizes the loading of the filter membrane mechanism 3. Cooperating with the elastic components 10 distributed up and down, it realizes the elastic support of the sleeved filter membrane mechanism 3, allows its elastic vibration, and at the same time, is stably clamped under the elastic action. Moreover, the air pressure cavity 23, the air inlet hole 26, and the side through hole 25 form an air pressure channel. Cooperating with the action of the movable plate 17, the bypass reset after air pressure pushing is realized, so as to cooperate with the elastic component 10 to realize reciprocating vibration.

[0031] Among them, the composite power assembly 4 further includes a connecting frame 41 and an electric push rod 43. The connecting frame 41 is fixedly connected to the top of the assembly frame 2. The air pump 42 is fixed on the top of the connecting frame 41. The air outlet end of the air pump 42 is communicated with the inside of the connecting frame 41. The electric push rod 43 is fixedly installed on the top of the housing 1, and the movable end is fixedly connected to the connecting frame 41. The connecting frame 41 is communicated with the air inlet hole 26. A sealing rod 15 is fixedly connected to the bottom surface of the connecting frame 41. The lower end of the sealing rod 15 passes through the top of the housing 1 and is sleeved on the bottom of the housing 1. A sealing sleeve is provided at the bottom of the housing 1. An annular groove 16 is formed on the outer side surface of the sealing rod 15, and the annular groove 16 is located inside the housing 1.

[0032] The composite power assembly 4 provides air pressure driving force and lifting power. The former realizes the vibration treatment of the filter membrane mechanism 3 in the filtering process, and the latter realizes the position change of the filter membrane mechanism 3. On the one hand, it can realize the independent flushing after moving down, and cooperate with the operation port 13 to realize the removal and replacement of the filter membrane mechanism 3. On the other hand, it can control the filter membrane mechanism 3 to move up and down actively during flushing to realize the dynamic flushing of different areas.

[0033] Among them, the flushing part 6 includes a conduction frame 61, a flushing port 62 and a connecting arm 63. The conduction frames 61 are symmetrically nested on both sides of the processing frame 5. The flushing port 62 is opened on the side surface of the conduction frame 61. The connecting arm 63 is fixedly connected to the outer side surface of the conduction frame 61 and is communicated with the inside of the conduction frame 61. An operation port 13 is opened on the outer side surface of the processing frame 5, and the operation port is located on the moving path of the assembly port 24.

[0034] The flushing part 6 cooperates with the intermittent conduction on both sides to realize the left-right alternating flushing of the filter membrane mechanism 3, further improving the flushing effect.

[0035] Among them, the distribution component 7 includes a distribution seat 71, an adaptation cavity 72, a reserved cavity 73, side ports 74, a front port 75 and a connecting pipe 76. The distribution seat 71 is fixedly connected to the bottom of the processing frame 5. The adaptation cavity 72 and the reserved cavity 73 are both opened inside the distribution seat 71. The adaptation cavity 72 and the reserved cavity 73 are communicated. The side ports 74 are symmetrically opened on both sides of the distribution seat 71 and are both communicated with the adaptation cavity 72. The outer ends of the side ports 74 are communicated with the connecting arms 63. The front port 75 is opened on the outer side surface of the distribution seat 71 and is located between the two groups of side ports 74. The front port 75 is communicated with the conducting pipe 12. The connecting pipe 76 is fixed to the end face of the distribution seat 71 and is communicated with the reserved cavity 73. The liquid supply mechanism 11 is communicated with the connecting pipe 76. The rotation and commutation component 8 includes a distribution disc 81, a rotating shaft 82, a gear 83 and a liquid outlet flow channel 84. The distribution disc 81 is rotatably sleeved in the adaptation cavity 72. One end of the rotating shaft 82 passes through the distribution seat 71 and is fixedly connected to the distribution disc 81. The gear 83 is fixedly sleeved on the outer surface of the rotating shaft 82. The liquid outlet flow channel 84 is opened inside the distribution disc 81. One end thereof is located at the end face of the distribution disc 81 and the other end is located on the circumferential surface of the outer side surface of the distribution disc 81. During rotation, the liquid outlet flow channel 84 is independently communicated with the two side ports 74 and the front port 75 respectively. A pushing control part 9 is fixedly arranged at the bottom of the processing frame 5. The pushing control part 9 includes a hydraulic push rod and a toothed plate. The hydraulic push rod drives the toothed plate to reciprocate horizontally. The toothed plate is meshed with the gear 83.

[0036] The distribution component 7 and the rotation and commutation component 8 cooperate together to realize the output of the cleaning liquid in different directions. When conducting alternately from left to right, the left - right alternate flushing of each group of filter membrane mechanisms 3 is realized. And after being guided and input into the conducting pipe 12, it can cooperate with the opened housing 1 to realize the internal flushing of the corresponding filtering intervals of each filter membrane mechanism 3, comprehensively improving the self - cleaning effect of the filter.

[0037] A filtering method for a filter based on a multi - layer composite membrane includes the following filtering steps: The first step: As the liquid to be filtered is input into the inner cavity of the housing 1, the liquid input from the left side passes through each group of filter membrane mechanisms 3 in the housing 1 in sequence to complete multi - layer filtering, and various filter substances are respectively intercepted on the left side surfaces of each group of filter membrane mechanisms 3. The second step: Start the composite power component 4. The air pump 42 inputs pressurized air into the interior of the assembly frame 2 and makes the filter membrane mechanisms 3 vibrate up and down. During filtering, the vibration is maintained, and the deposits attached to the filter membrane mechanisms 3 are dispersed. The third step: When cleaning is required, stop the liquid input, start the composite power component 4 again, drive the assembly frame 2 to move downward, so that the filter membrane mechanisms 3 move down into the processing frame 5. Start an external water pump, input clean water into the liquid supply mechanism 11 and then into the rotation and commutation component 8. Start the pushing control part 9 to make the rotation and commutation component 8 rotate reciprocally. Step 4: When the rotating commutation component 8 is in communication with the left side of the flushing part 6, the water flow flushes towards the left side of the filter membrane mechanism 3 in the treatment box 5, and when the rotating commutation component 8 is in communication with the right side of the flushing part 6, the water flow flushes the filter membrane mechanism 3 reversely along the right side. At the same time, the composite power component 4 controls the up and down movement of the filter membrane mechanism 3, so that the filter membrane mechanism 3 reciprocates up and down in the treatment box 5, realizing the dynamic flushing of different areas of the filter membrane mechanism 3; Step 5: When the assembly frame 2 moves downward for flushing, it drives the sealing rod 15 to move downward at the same time, so that the lower end of the annular groove 16 moves to the bottom of the housing 1, opening the bottom of the housing 1, so that the accumulated liquid on the left side of each group of assembly frames 2 is discharged from the housing 1, and the impurities filtered out in the accumulated liquid are discharged along with the liquid. When the rotating commutation component 8 rotates and is in communication with the front port 75, the flushing water is input into the left side of each group of assembly frames 2 through the conduction pipe 12 to flush the chamber in the left area and flush the attached particles on the inner wall clean.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter based on a multi-layer composite membrane, comprising a housing (1) and a filter membrane mechanism (3), characterized in that: An assembly frame (2) is movably sleeved inside the housing (1), a filter membrane mechanism (3) is movably installed in the assembly frame (2), a processing frame (5) is fixedly connected to the bottom of the housing (1), a flushing part (6) is fixedly installed on the outer side of the processing frame (5), a distribution component (7) is fixedly installed at the bottom of the processing frame (5), a rotating reversing component (8) is rotatably installed inside the distribution component (7), a liquid supply mechanism (11) is fixedly arranged at the bottom of the processing frame (5), the liquid supply mechanism (11) inputs cleaning liquid into the rotating reversing component (8), a conducting pipe (12) is fixedly communicated between the housing (1) and the distribution component (7), a pressure valve is arranged at the inner end of the conducting pipe (12), the distribution component (7) is communicated with the flushing part (6), elastic components (10) are arranged on both the upper and lower surfaces of the filter membrane mechanism (3), and the elastic components (10) are elastically connected in the assembly frame (2). A composite power component (4) is fixedly arranged at the top of the housing (1), the composite power component (4) includes an air pump (42), the assembly frame (2) includes an assembly cavity (22), a pneumatic cavity (23) and a side through hole (25), the upper ends of a group of elastic components (10) are fixedly connected with a movable plate (17), the air pump (42) injects pressurized air into the pneumatic cavity (23), and pushes the movable plate (17) located in the pneumatic cavity (23) to move downward, and drives the filter membrane mechanism (3) to move downward in the assembly cavity (22) through the connected elastic components (10). After moving downward, the side through hole (25) is communicated with and bypasses the pneumatic cavity (23), and the elastic components (10) drive the filter membrane mechanism (3) to elastically reset, controlling the filter membrane mechanism (3) to vibrate up and down in the assembly frame (2).

2. The filter based on a multi-layer composite film according to claim 1, wherein: The number of the filter membrane mechanisms (3) is three, the three filter membrane mechanisms (3) respectively correspond to a microfiltration membrane, an ultrafiltration membrane and a nanofiltration membrane, and composite filtration treatment is sequentially completed through the microfiltration membrane, the ultrafiltration membrane and the nanofiltration membrane. The filter membrane mechanism (3) includes a connection frame and a filter membrane body fixed in the middle of the connection frame.

3. The filter based on a multi-layer composite film according to claim 2, characterized in that: The assembly frame (2) further includes a frame body (21), an assembly port (24) and an air inlet hole (26). The assembly cavity (22) and the pneumatic cavity (23) are both arranged in the frame body (21). The assembly port (24) is arranged on the side surface of the frame body (21) and communicated with the assembly cavity (22). The side through hole (25) is arranged on the side surface of the frame body (21), and the side through hole (25) is communicated with the pneumatic cavity (23). The air inlet hole (26) is arranged on the top of the frame body (21), and the air inlet hole (26) is communicated with the pneumatic cavity (23). The two elastic components (10) are symmetrically distributed in the assembly cavity (22), and the filter membrane mechanism (3) is sleeved in the assembly cavity (22).

4. The filter based on a multi-layer composite film according to claim 3, characterized in that: The composite power component (4) further includes a communication frame (41) and an electric push rod (43). The communication frame (41) is fixedly connected to the top of the assembly frame (2). The air pump (42) is fixed on the top of the communication frame (41). The air outlet end of the air pump (42) is communicated with the inside of the communication frame (41). The electric push rod (43) is fixedly installed on the top of the housing (1), and the movable end is fixedly connected to the communication frame (41). The communication frame (41) is communicated with the air inlet hole (26). The bottom surface of the communication frame (41) is fixedly connected with a sealing rod (15). The lower end of the sealing rod (15) passes through the top of the housing (1) and is sleeved on the bottom of the housing (1). A sealing sleeve is provided at the bottom of the housing (1). An annular groove (16) is formed on the outer side surface of the sealing rod (15), and the annular groove (16) is located inside the housing (1).

5. The filter based on a multi-layer composite film according to claim 4, characterized in that: The flushing part (6) includes a conduction frame (61), a flushing port (62) and a communication arm (63). The conduction frame (61) is symmetrically nested on both sides of the processing frame (5). The flushing port (62) is opened on the side surface of the conduction frame (61). The communication arm (63) is fixedly connected to the outer side surface of the conduction frame (61) and is communicated with the inside of the conduction frame (61). An operation port (13) is opened on the outer side surface of the processing frame (5), and the operation port is located on the moving path of the assembly port (24).

6. The filter based on a multi-layer composite film according to claim 5, characterized in that: The distribution component (7) includes a distribution seat (71), an adaptation cavity (72), a reserved cavity (73), side ports (74), a front port (75) and a communication pipe (76). The distribution seat (71) is fixedly connected to the bottom of the processing frame (5). The adaptation cavity (72) and the reserved cavity (73) are both opened inside the distribution seat (71). The adaptation cavity (72) is communicated with the reserved cavity (73). The side ports (74) are symmetrically opened on both sides of the distribution seat (71) and are both communicated with the adaptation cavity (72). The outer ends of the side ports (74) are communicated with the communication arm (63). The front port (75) is opened on the outer side surface of the distribution seat (71) and is located between the two groups of side ports (74). The front port (75) is communicated with the conduction pipe (12). The communication pipe (76) is fixed to the end face of the distribution seat (71) and is communicated with the reserved cavity (73). The liquid supply mechanism (11) is communicated with the communication pipe (76).

7. The filter based on a multi-layer composite film according to claim 6, characterized in that: The rotation and commutation assembly (8) includes a distribution disc (81), a rotating shaft (82), a gear (83), and a liquid outlet flow channel (84). The distribution disc (81) is rotatably sleeved in the fitting cavity (72). One end of the rotating shaft (82) passes through the distribution seat (71) and is fixedly connected to the distribution disc (81). The gear (83) is fixedly sleeved on the outer surface of the rotating shaft (82). The liquid outlet flow channel (84) is formed inside the distribution disc (81). One end thereof is located on the end face of the distribution disc (81), and the other end is located on the circumferential surface of the outer side of the distribution disc (81). During rotation, the liquid outlet flow channel (84) is independently communicated with two side ports (74) and a front port (75) respectively. A push control part (9) is fixedly provided at the bottom of the processing frame (5). The push control part (9) includes a hydraulic push rod and a toothed plate. The hydraulic push rod drives the toothed plate to reciprocate horizontally, and the toothed plate is meshed with the gear (83).

8. The filter based on a multi-layer composite film according to claim 3, characterized in that: The elastic component (10) includes a movable rod (101), a push plate (102), and a spring (103). The movable rod (101) is movably sleeved in the frame body (21), and one end of the movable rod (101) is located in the assembly cavity (22). The push plate (102) is fixedly connected to one end of the movable rod (101) and is located at one end close to the filter membrane mechanism (3). One end of the spring (103) is fixedly connected in the assembly cavity (22), and the other end is fixedly connected to the push plate (102).

9. The filter based on a multi-layer composite film according to claim 8, characterized in that: The movable plate (17) is fixedly connected to the movable rod (101) in the elastic component (10). The side through hole (25) is located on the movement path of the movable plate (17). An air outlet hole (14) is formed in the back surface of the housing (1), and the air outlet hole (14) is communicated with the side through hole (25).

10. A filtering method for a filter based on a multi-layer composite film according to any one of claims 1-9, characterized in that: It includes the following filtration steps: The first step: As the mixed liquid to be filtered is input into the inner cavity of the housing (1), the liquid input from the left side sequentially passes through each group of filter membrane mechanisms (3) in the housing (1) to complete multi-layer filtration, and various filtration substances are respectively intercepted on the left side surfaces of each group of filter membrane mechanisms (3). The second step: Start the composite power assembly (4). The air pump (42) inputs pressurized air into the inside of the assembly frame (2), and makes the filter membrane mechanism (3) vibrate up and down, and maintains the vibration during filtration to disperse the deposits attached to the filter membrane mechanism (3). The third step: When cleaning is required, stop the liquid input, start the composite power assembly (4) again, drive the assembly frame (2) to move downward, so that the filter membrane mechanism (3) moves down into the processing frame (5), start an external water pump, input clean water into the liquid supply mechanism (11), and then input it into the rotation and commutation assembly (8), start the push control part (9), and make the rotation and commutation assembly (8) rotate reciprocally. Step 4: When the rotating commutation component (8) is in communication with the left side of the flushing part (6), the water flow flushes towards the left side of the filter membrane mechanism (3) in the treatment frame (5). When the rotating commutation component (8) is in communication with the right side of the flushing part (6), the water flow flushes the filter membrane mechanism (3) in the reverse direction along the right side. At the same time, the composite power component (4) controls the up-and-down movement of the filter membrane mechanism (3), so that the filter membrane mechanism (3) reciprocates up and down in the treatment frame (5), realizing the dynamic flushing of different areas of the filter membrane mechanism (3). Step 5: When the assembly frame (2) moves downward for flushing, it drives the sealing rod (15) to move downward at the same time, so that the lower end of the annular groove (16) moves to the bottom of the housing (1), opening the bottom of the housing (1), and discharging the accumulated liquid on the left side of each group of assembly frames (2) from the housing (1). The impurities filtered out in the accumulated liquid are discharged along with the liquid. When the rotating commutation component (8) rotates and is in communication with the front port (75), the flushing water is input into the left side of each group of assembly frames (2) through the conduction pipe (12) to flush the chambers in the left area, and the attached particles on the inner wall are flushed clean.

Images