Ultrafiltration equipment

Abstract

The present application discloses an ultrafiltration device and a process for treating kitchen wastewater, comprising a frame, a plurality of joints fixedly connected to the frame, a plurality of filter pipes arranged on the frame, connectors slidably connected to both ends of the filter pipes, a transport assembly and a clamping assembly arranged in the filter pipes, wherein both ends of the filter pipes are matched with the joints through the connectors, the filter pipes are movable on the frame, and when the filter pipes and the joints are offset, the transport assembly is capable of transporting the filter element in the filter pipe to the outside of the pipe, and the clamping assembly is used to fix the filter element. By providing a filter pipe movable on the frame and connectors, a transport assembly and a clamping assembly of a specific structure, the present application can offset the filter pipe and the joints when replacing the filter element, and the transport assembly can gradually move the filter element toward the end of the filter pipe, facilitating the removal and replacement of the filter element, thereby effectively improving the convenience and efficiency of the filter element replacement operation.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to an ultrafiltration device. Background Art

[0002] Most current ultrafiltration equipment for sewage treatment uses a long-pipe design architecture, aiming to extend the contact time between sewage and filter elements, improve filtration effects, and enhance filtration levels and precision with the help of a multi-stage filter element layout. This segmented placement of filter elements under this long-pipe configuration presents many problems; for example, the lengthy filter pipes meander within a limited space, making it difficult for operators to reach deep into the area, and conventional tools are limited in operation, making it difficult to inspect and maintain deep filter elements. Furthermore, segmented filter elements are constrained by the pipes, tightly connected to each other, and often have sealing and fixed structures. When removing the front-stage filter element, care must be taken to avoid interference and damage to subsequent sections. When removing filter elements located deep within the pipe, numerous obstacles must be overcome, consuming a significant amount of manpower and time. Many related pipe components often need to be disassembled for auxiliary operations, severely impacting equipment operation and maintenance efficiency and overall operating time, increasing the frequency of shutdowns for maintenance at sewage treatment plants and weakening their treatment capacity and economic benefits. Summary of the Invention

[0003] The purpose of this application is to provide an ultrafiltration device to increase the speed of filter element replacement.

[0004] In a first aspect, the present application provides an ultrafiltration device using the following technical solution:

[0005] An ultrafiltration device includes a frame, a plurality of joints fixedly connected to the frame, a plurality of filter pipes arranged on the frame, connectors slidably connected to both ends of the filter pipes, a transport assembly and a clamping assembly arranged in the filter pipes, the two ends of the filter pipes being matched with the joints through the connectors, the filter pipes being able to move on the frame, and when the filter pipes are staggered from the joints, the transport assembly being able to transport the filter element in the filter pipe to the outside of the pipe, and the clamping assembly being used to fix the filter element.

[0006] Preferably, the transport assembly includes a first connecting rod, several first rotating blocks rotatably connected to the inner wall of the filter pipe, and two first shift rods fixedly connected to the first rotating blocks. The first rotating block is provided with a first slide groove, the first connecting rod is slidably connected to the first slide groove, the installation positions of the two first shift rods are symmetrical to the first slide groove, and the two first shift rods are both in contact with the filter element.

[0007] Preferably, the inner walls at both ends of the filter pipe are fixedly connected to a support frame, the first connecting rod passes through the support frame, the two ends of the first connecting rod are fixedly connected to a first limit platform, a first spring is provided between the first limit platform and the support frame, the first spring maintains the position of the first connecting rod, the connecting piece is slidably connected to a first intermediate rod slidably connected to the first connecting rod, and the first intermediate rod is connected to the first connecting rod by a first tension spring.

[0008] Preferably, the clamping assembly includes a connecting plate connecting the support frames at both ends, a clamping rod that passes through and is slidably connected to the connecting plate, a clamping plate fixedly connected to the end of the clamping rod, a second rotating block rotatably connected to the clamping rod, a second lever fixedly connected to the second rotating block, and a second connecting rod that passes through and is slidably connected to the support frame, the second rotating block is provided with a second sliding groove, the second connecting rod is slidably connected to the second sliding groove, the installation positions of the two second levers are symmetrical about the second sliding groove, the end of the second lever is provided with a roller that abuts the connecting plate, and a pre-tightening spring is provided between the clamping plate and the connecting plate, and the pre-tightening spring forces the clamping plate toward the filter element.

[0009] Preferably, the second connecting rod is provided with a second limiting platform, a second spring is provided between the second limiting platform and the support frame, the second spring position is located at the second connecting rod position, and the first connecting rod is fixedly connected to the second connecting rod.

[0010] Preferably, the connecting piece is provided with an annular groove, the annular groove is clamped with an annular block, the annular block is fixedly connected to a pull rod, the filter pipe is fixedly connected to a guide ring, the pull rod passes through the guide ring, the filter pipe is fixedly connected to a fixed block, a slide rail is provided on the frame, the slide rail is slidably connected to the fixed block, the fixed block is slidably connected to a third connecting rod, both ends of the third connecting rod pass through the fixed block, the third connecting rod is slidably connected to the pull rod, and the end of the third connecting rod is connected to the pull rod through a second tension spring.

[0011] Preferably, both ends of the third connecting rod are fixedly connected to a third limit platform, a third spring is provided between the third limit platform and the fixed block, the third spring maintains the position of the third connecting rod, the pull rod sleeve is provided with a fourth spring, the fourth spring is located between the annular block and the guide ring, the fourth spring maintains the position of the pull rod, the fixed block is fixedly connected to the first motor, the output end of the first motor is fixedly connected to a half gear, and the third connecting rod is provided with a rack meshing with the half gear.

[0012] Preferably, an annular worm gear is installed on the side surface of the connecting member, a worm that can engage with the annular worm gear is installed on the frame, a second motor that drives the worm to rotate is installed on the frame, a gear ring is fixedly connected to the side surface of the connecting member, a driving gear that engages with the gear ring is installed on the frame, and a third motor that provides power to the driving gear is installed on the frame.

[0013] Preferably, the connecting piece is provided with a stepped portion, the stepped portion is provided with an annular rubber, the support frame is fixedly connected to the first barrel ring, the first barrel ring is threadedly connected to the second barrel ring, the second barrel ring is fixedly connected to the annular rubber, and the connecting piece is keyed to the annular rubber.

[0014] In a second aspect, the present application provides a process for treating kitchen wastewater, which adopts the following technical solution:

[0015] A process for treating kitchen wastewater includes a regulating tank, an anaerobic tank, a snail stacker, a biochemical tank, an ultrafiltration device, and a coagulation and sedimentation unit. First, kitchen wastewater flows into the regulating tank for pretreatment. After pretreatment, the wastewater flows into the anaerobic tank. Organic matter in the wastewater is decomposed by microorganisms. Anaerobic treatment produces a large amount of sludge. The wastewater is desludged by the snail stacker. The desludged wastewater flows into the biochemical tank and the sludge is transported out. The biochemical tank further decomposes the organic matter in the wastewater. The sludge produced by the decomposition is transported to the snail stacker. The wastewater in the biochemical tank flows into the ultrafiltration device for ultrafiltration. The filtered water flows into the coagulation and sedimentation unit. The sludge is transported to the snail stacker through the biochemical tank. The sludge is further purified by the coagulation and sedimentation unit and discharged. Unqualified produced water flows back to the regulating tank.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. By providing a filter pipe that can be moved on the rack and a connector, transport assembly, and clamping assembly with a specific structure, the filter pipe and the joint can be offset when replacing the filter element. The transport assembly can gradually move the filter element to the end of the filter pipe, making it easier to remove and replace the filter element, effectively improving the convenience and efficiency of the filter element replacement operation.

[0018] 2. The rational arrangement of the first rotating block in the transport assembly and the V-shaped structure design of the first lever enable the filter element to be transported step by step simply by rotating the first lever back and forth. The lever can also be quickly disengaged from the filter element when it is reset, preventing the filter element from moving during reset, thus ensuring efficient and accurate filter element transportation.

[0019] 3. The clamping assembly uses a pre-tightened spring to clamp the filter element with the clamping plate, maintaining the filter element position stable during transportation and normal use. In addition, through the linkage of the second connecting rod and related components, the clamping plate can flexibly control the locking and unlocking of the filter element, further enhancing the stability and reliability of the filter element fixation.

[0020] 4. The connection design between the connector and each component is ingenious. For example, the circular clamping between the annular groove and the annular block effectively disperses stress and prevents the pull rod from falling off; the pull rod passes through the guide ring to ensure the accuracy of its motion axis; the elastic connection system formed by the third connecting rod and the pull rod, as well as the setting of each spring, enhances the elastic buffering capacity of the entire structure, making the connection between each component more secure and the operation more stable.

[0021] 5. The cooperation of the annular rubber at the connector, the first barrel ring and the second barrel ring and other components can achieve the sealing of the connector and the joint connection and restrict the movement of the filter pipe when the second motor rotates in the forward direction, providing a good sealing environment and stable operating conditions for related operations during the filter element replacement process, which helps to ensure the safety and stability of the overall operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0023] Figure 2 This is an assembly diagram of the filter pipe, connector, and joint in Example 1 of the present application;

[0024] Figure 3 This application Figure 2 Schematic diagram of the AA structure;

[0025] Figure 4 This application Figure 3 Schematic diagram of the BB structure;

[0026] Figure 5 This application Figure 4 A local enlarged view of point a in the middle;

[0027] Figure 6 This application Figure 3 Schematic diagram of CC structure;

[0028] Figure 7 This application Figure 6 A partial enlarged view of point b in the middle;

[0029] Figure 8 This application Figure 4 truncation diagram of ;

[0030] Figure 9 This application Figure 8 A partial enlarged view of point c in the middle;

[0031] Figure 10 This is the process flow chart of the restaurant wastewater treatment process of this application.

[0032] Explanation of the accompanying symbols: 1. frame; 11. slide rail; 12. worm; 13. second motor; 14. annular worm gear; 15. third motor; 16. gear ring; 2. joint; 3. connector; 31. annular slide; 32. annular groove; 33. step; 4. filter pipe; 41. support frame; 42. connecting plate; 43. second barrel ring; 44. annular rubber; 45. first barrel ring; 5. transport assembly; 51. first connecting rod; 52. first rotating block; 521. first slide; 522. first lever; 53. first limit platform; 54. first spring; 55. first intermediate rod; 56. connection Block; 57, first tension spring; 6, clamping assembly; 61, second connecting rod; 62, second rotating block; 621, second shift rod; 622, second slide groove; 623, roller; 63, clamping plate; 64, preload spring; 65, second limit platform; 66, second spring; 67, tightening rod; 7, water purification pipeline; 71, through hole; 8, filter element; 9, fixed block; 91, first motor; 92, third connecting rod; 921, third limit platform; 922, rack; 93, half gear; 94, third spring; 95, pull rod; 96, annular block; 97, fourth spring; 98, second tension spring; 99, guide ring. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1 -Attached Figure 10 This application is described in further detail.

[0034] The embodiment of the present application discloses an ultrafiltration device.

[0035] Example 1, with reference to Figure 1 、 Figure 2 and Figure 3 The filter element 8 is connected to the filter element 4 by a plurality of filter elements 2, and the filter element 4 is connected to the filter element 4 by a plurality of filter elements 2.

[0036] refer to Figure 4 and Figure 5 The transport assembly 5 includes a first connecting rod 51, a plurality of first rotating blocks 52 rotatably connected to the inner wall of the filter pipe 4, and two first shifting rods 522 fixedly connected to the first rotating block 52. The first rotating blocks 52 are evenly arranged in four rows on the inner wall of the filter pipe 4. The first rotating blocks 52 are provided with first sliding grooves 521. The number of first connecting rods 51 is 4, and each first connecting rod 51 corresponds to a row of first rotating blocks 52. The first connecting rods 51 are slidably connected to the first sliding grooves 521 in the same row. The fixed positions of the two first shifting rods 522 on each first rotating block 52 are symmetrical about the first sliding grooves 521. The first sliding grooves 521 are straight grooves. The rotation center of a rotating block 52 is located on the colinear line of the first sliding groove 521, and the ends of the two first shifting rods 522 are both in contact with the filter element 8. In this way, when the first rotating block 52 rotates, the two first shifting rods 522 will both be shifted in an arc shape, so that the filter element 8 can be gradually transported by simply rotating the first shifting rod 522 back and forth; the two first shifting rods 522 form a V-shaped structure. On the one hand, the first rotating block 52 only needs to be rotated in different directions to realize the up and down movement of the filter element 8. On the other hand, when the first shifting rod 522 is rotated to reset, it can quickly disengage from the filter element 8 to prevent the reset from causing the filter element 8 to move.

[0037] refer to Figure 5 The inner walls of both ends of the filter pipe 4 are fixedly connected with a support frame 41, and a first connecting rod 51 passes through the support frame 41. Both ends of the first connecting rod 51 are fixedly connected with a first limit platform 53. A first spring 54 is provided between the first limit platform 53 and the support frame 41. The two ends of the first spring 54 are respectively fixedly connected to the first limit platform 53 and the support frame 41. The first connecting rod 51 is supported on the support frame 41 under the opposite force of the two first springs 54. When the first connecting rod 51 moves, the two first springs 54 will generate a deformation force, which is used to reset the first connecting rod 51.

[0038] The connecting member 3 is slidably connected to a first intermediate rod 55 slidably connected to the first connecting rod 51. The first intermediate rod 55 and the first connecting rod 51 are connected by a first tension spring 57. The connecting member 3 is provided with an annular groove 31. The end of the first intermediate rod 55 is clamped in the annular groove 31 and can move along the annular groove 31. When the connecting member 3 rotates, the first intermediate rod 55 maintains a sliding connection with the first connecting rod 51. The elastic force of the first tension spring 57 is greater than the first spring 54. When the connecting member 3 at the bottom moves downward, the first intermediate rod 55 at the bottom can drive the first connecting rod 51 to move through the first tension spring 57. At this time, the first tension spring 57 at the top is also stretched, so that the first tension spring 57 can move downward as a whole and drive the first rotating block 52 to rotate, and the first deflector rod 522 drives the filter element 8 outward. When the connecting member 3 at the bottom returns to the top, as the first tension spring 57 is relaxed and the first spring 54 is deformed and restored, the first connecting rod 51 will return to the top, causing the first rotating block 52 to rotate in the opposite direction.

[0039] refer to Figure 6 and Figure 7 The clamping assembly 6 includes a connecting plate 42 connecting the support frames 41 at both ends, a clamping rod 67 that passes through and is slidably connected to the connecting plate 42, a clamping plate 63 fixedly connected to the end of the clamping rod 67, a second rotating block 62 rotatably connected to the clamping rod 67, a second shifting rod 621 fixedly connected to the second rotating block 62, and a second connecting rod 61 that passes through and is slidably connected to the support frame 41. A pre-tightening spring 64 is provided between the clamping plate 63 and the connecting plate 42. The pre-tightening spring 64 forces the clamping plate 63 toward the filter element 8, so that the clamping plate 63 can clamp the filter element 8. The second rotating block 62 is provided with a second sliding groove 622, and the second connecting rod 61 is slidingly connected to the second sliding groove 622. The installation positions of the two second shift rods 621 are symmetrical about the second sliding groove 622, and the end of the second shift rod 621 is provided with a roller 623 that abuts against the connecting plate 42; when the second connecting rod 61 drives the second rotating block 62 to rotate, the abutting rod will move in the direction away from the filter element 8, thereby releasing the lock on the filter element 8; when the second connecting rod 61 is reset, the pre-tightening spring 64 will reset the clamping plate 63, so that the two second shift rods 621 continue to abut against the connecting plate 42 at the same time.

[0040] refer to Figure 7 The second connecting rod 61 is provided with a second limit platform 65, and a second spring 66 is provided between the second limit platform 65 and the support frame 41. The second spring 66 positions the second connecting rod 61. The second connecting rod 61 is supported on the support frame 41 under the opposite force of the two second springs 66. When the second connecting rod 61 moves, the two second springs 66 will generate a deformation force, which is used to reset the second connecting rod 61; the second connecting rod 61 is fixedly connected to the first connecting rod 51 through the connecting block 56, thereby realizing the synchronous movement of the first connecting rod 51 and the second connecting rod 61.

[0041] refer to Figure 8 The connecting piece 3 is provided with an annular groove 32, and the annular groove 32 is clamped with an annular block 96. The annular block 96 is fixedly connected to a pull rod 95, and the filter pipe 4 is fixedly connected with a guide ring 99. The pull rod 95 passes through the guide ring 99, and the filter pipe 4 is fixedly connected to the fixed block 9. A slide rail 11 is provided on the frame 1, and the slide rail 11 is slidably connected to the fixed block 9. The fixed block 9 is slidably connected with a third connecting rod 92. Both ends of the third connecting rod 92 pass through the fixed block 9, and the third connecting rod 92 is slidably connected to the pull rod 95. The end of the third connecting rod 92 is connected to the pull rod 95 by a second tension spring 98; the circumferential clamping connection between the annular groove 32 and the annular block 96 can effectively disperse stress and prevent the pull rod 95 from easily falling off from the connecting piece 3. When the connecting piece 3 rotates, the annular groove 32 and the annular block 96 can remain clamped; the pull rod 95 passes through the guide ring 99, which plays a guiding and positioning role for the pull rod 95. It ensures that the pull rod 95 always remains on the correct axis during movement, preventing the pull rod 95 from deflecting. The two ends of the third connecting rod 92 pass through the fixed block 9 and are slidably connected to the pull rod 95. The ends are also connected by a second tension spring 98. This structure forms an elastic connection system between the pull rod 95 and the filter pipe 4. The elastic force of the third tension spring is the largest. When the third connecting rod 92 moves upward, the third tension spring at the top will push up the pull rod 95, and the third tension spring at the bottom will tighten the pull rod 95. In this way, only the upper connecting member 3 can move upward, so that the upper connecting member 3 drives the transport assembly 5 and the clamping assembly 6 to move.

[0042] refer to Figure 8The third connecting rod 92 is fixedly connected to third limiting platforms 921 at both ends. A third spring 94 is provided between the third limiting platform 921 and the fixed block 9 to maintain the position of the third connecting rod 92. A fourth spring 97 is sleeved on the pull rod 95. The fourth spring 97 is located between the annular block 96 and the guide ring 99 to maintain the position of the pull rod 95. The fixed block 9 is fixedly connected to the first motor 91. The output end of the first motor 91 is fixedly connected to the half gear 93. The third connecting rod 92 is provided with a rack 922 that meshes with the half gear 93. The third springs 94 provided between the third limiting platforms 921 and the fixed block 9 at both ends of the third connecting rod 92 further enhance the elastic buffering capacity of the entire structure and make the third connecting rod 92 more stable. The first motor 91 drives the half gear 93 in different directions to drive the third connecting rod 92 up or down. In this way, the direction of the reciprocating motion of the third connecting rod 92 can be controlled by simply controlling the rotation direction of the first motor 91. When the first motor 91 drives the third connecting rod 92 to move upward through the half gear 93, the third spring 94 will be deformed. The deformation force generated by the third spring 94 is used to reset the third connecting rod 92. Since the meshing period of the half gear 93 and the rack 922 on the third connecting rod 92 is only one-half, the third connecting rod 92 can be driven to move when the half gear 93 is meshed with the rack 922; when the half gear 93 is disengaged from the rack 922, the third connecting rod 92 can be reset under the action of the third spring 94.

[0043] refer to Figure 9 An annular worm gear 14 is installed on the side surface of the connecting member 3, and the frame 1 is installed with a worm 12 that can engage with the annular worm gear 14. The frame 1 is installed with a second motor 13 that drives the worm 12 to rotate; when the second motor 13 is started, the circumferential rotation of the filter pipe 4 is restricted, so that the annular worm gear 14 can climb along the worm 12, thereby realizing the movement of the filter pipe 4 on the frame 1.

[0044] refer to Figure 9 The connector 3 is provided with a stepped portion 33, the stepped portion 33 is provided with an annular rubber 44, the support frame 41 is fixedly connected to the first barrel ring 45, the first barrel ring 45 is threadedly connected to the second barrel ring 43, the second barrel ring 43 is fixedly connected to the annular rubber 44, the connector 3 is keyed to the annular rubber 44, the side surface of the connector 3 is fixedly connected to the gear ring 16, the frame 1 is equipped with a driving gear meshing with the gear ring 16, and the frame 1 is equipped with a third motor 15 that provides power for the driving gear. When the second motor 13 rotates forward, the connector 3 rotates accordingly, and the connector 3 drives the second barrel ring 43 to rotate. Since the second barrel ring 43 is threadedly connected to the first barrel ring 45, the second barrel ring 43 can drive the annular rubber 44 to move upward to seal the connection between the connector 3 and the joint 2; and can limit the movement of the filter pipe 4.

[0045] The implementation principle of an ultrafiltration device in an embodiment of the present application is as follows: sewage enters the filter pipe 4 through a transport pipe connected to the connector 2, the filter element 8 is mounted on a clean water pipe 7 provided with multiple through holes 71, and the sewage enters the clean water pipe 7 after being filtered by the filter element 8, and is transported away from the outlet pipe connected to the clean water pipe 7.

[0046] When the filter element 8 needs to be replaced, the second motor 13 is started, and the second motor 13 drives the worm 12 to rotate. Since the circumferential rotation of the filter pipe 4 is limited, the annular worm gear 14 on the connecting member 3 engaged with the worm 12 will climb along the worm 12, thereby driving the filter pipe 4 to move on the frame 1, causing the filter pipe 4 to offset from the joint 2, thereby facilitating the subsequent replacement operation of the filter element 8.

[0047] During the replacement process of the filter element 8, the transport assembly 5 plays a role. The first motor 91 drives the half gear 93 to rotate, and the half gear 93 engages with the rack 922 on the third connecting rod 92 to drive the third connecting rod 92 to move. When the third connecting rod 92 moves upward, due to the elastic characteristics of the third tension spring, only the upper connecting member 3 can move upward, and this connecting member 3 drives the components connected to it to move. The annular groove 32 of the connecting member 3 is engaged with the annular block 96, and the pull rod 95 passes through the guide ring 99 and is slidably connected to the third connecting rod 92 and is connected through the second tension spring 98 to form an elastic connection system. At the same time, the first intermediate rod 55 to which the connecting member 3 is slidably connected is connected to the first connecting rod 51 through the first tension spring 57, and the elastic force of the first tension spring 57 is greater than that of the first spring 54. When the lower connecting member 3 moves downward, the lower first intermediate rod 55 drives the first connecting rod 51 to move downward through the first tension spring 57 to overcome the force of the first spring 54, and the upper first tension spring 57 is stretched, so that the first connecting rod 51 moves downward as a whole and drives the first rotating block 52 to rotate. The two first shifting rods 522 ends of the V-shaped structure on the first rotating block 52 abut against the filter element 8 and perform an arc-shaped shift, so that the filter element 8 moves outward; when the lower connecting member 3 returns to its original position, the first tension spring 57 relaxes and returns to its original position, and the first spring 54 deforms and returns to its original position, so that the first connecting rod 51 returns to its original position upward and drives the first rotating block 52 to rotate in the opposite direction.

[0048] The clamping assembly 6 maintains the filter element 8's stable position throughout the entire process. The clamping plate 63, under the action of the preload spring 64, clamps the filter element 8 toward the filter element 8. When the second connecting rod 61 drives the second rotating block 62 to rotate, the roller 623 at the end of the second lever 621 of the second rotating block 62 abuts the connecting plate 42, causing the abutting rod 67 to drive the clamping plate 63 away from the filter element 8, releasing the lock on the filter element 8. When the second connecting rod 61 returns, the preload spring 64 resets the clamping plate 63, causing the two second levers 621 to continue abutting the connecting plate 42. The second connecting rod 61 is fixedly connected to the first connecting rod 51 via the connecting block 56, enabling their synchronous movement.

[0049] In addition, the connector 3 is provided with a stepped portion 33 and an annular rubber 44. The first barrel ring 45 connected to the support frame 41 is threadedly connected to the second barrel ring 43, and the second barrel ring 43 is fixedly connected to the annular rubber 44. The connector 3 and the annular rubber 44 are keyed. The gear ring 16 on the side surface of the connector 3 meshes with the drive gear on the frame 1 and is driven by the third motor 15. When the second motor 13 rotates in the forward direction, the connector 3 drives the second barrel ring 43 to rotate, causing the second barrel ring 43 to drive the annular rubber 44 to move upward to seal the connection between the connector 3 and the joint 2 and restrict the movement of the filter pipe 4, providing sealing and stability for certain operations during the replacement of the filter element 8.

[0050] refer to Figure 10 , a food wastewater treatment process, including a regulating tank, an anaerobic tank, a spiral press for desludging, a biochemical tank, an ultrafiltration equipment and coagulation sedimentation.

[0051] Kitchen wastewater is first pretreated in a regulating tank. The pretreatment mainly adjusts the water quality and quantity of kitchen wastewater, such as the pH value, temperature and pollutant concentration of the wastewater, to ensure that the subsequent treatment units can operate under relatively stable conditions. After the pretreatment, the wastewater enters the anaerobic tank to use anaerobic microorganisms to decompose the macromolecular organic matter in the wastewater, reducing the load of the subsequent treatment units. A large amount of sludge will be generated during the anaerobic treatment process. The desludging treatment is carried out by a spiral stacker to prevent a large amount of sludge from entering the subsequent treatment units and affecting the treatment effect. The wastewater after the anaerobic tank treatment flows into the biochemical tank, which adopts a two-stage A / O (anoxic / The wastewater is further treated using an aerobic (A / O) process. In the first stage, in the anoxic tank, denitrifying bacteria use organic matter in the wastewater as a carbon source to reduce nitrate and nitrite nitrogen in the reflux mixture to nitrogen gas, achieving denitrification. In the aerobic tank, aerobic microorganisms further decompose organic matter in the wastewater into carbon dioxide and water, while simultaneously converting ammonia nitrogen into nitrate and nitrite nitrogen through nitrification. The second stage, in the A / O process, further enhances denitrification and phosphorus removal. By optimizing process parameters and microbial community structure, pollutants such as nitrogen and phosphorus are more fully removed. Ultrafiltration equipment then intercepts macromolecular organic matter, colloids, and bacteria in the wastewater, further purifying the water. The water filtered by the ultrafiltration equipment enters the coagulation and sedimentation unit, where the addition of coagulants causes fine particles and residual organic matter in the wastewater to form flocs and settle, further improving water quality. Finally, water that meets the standards after treatment in the coagulation and sedimentation unit is discharged, while the remaining water that does not meet the standards is returned to the equalization tank.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An ultrafiltration device, characterized in that: The invention comprises a frame (1), a plurality of joints (2) fixedly connected to the frame (1), a plurality of filter pipes (4) arranged on the frame (1), connectors (3) slidably connected to both ends of the filter pipes (4), a transport assembly (5) and a clamping assembly (6) arranged in the filter pipes (4), wherein both ends of the filter pipes (4) are connected to the joints (2) via the connectors (3), the filter pipes (4) can be moved on the frame (1), and when the filter pipes (4) are staggered with the joints (2), the transport assembly (5) can transport the filter element (8) in the filter pipe (4) to the outside of the pipe, and the clamping assembly (6) is used to fix the filter element (8); The transport assembly (5) comprises a first connecting rod (51), a plurality of first rotating blocks (52) rotatably connected to the inner wall of the filter pipe (4), and two first shifting rods (522) fixedly connected to the first rotating blocks (52), the first rotating blocks (52) being provided with a first sliding groove (521), the first connecting rod (51) being slidably connected to the first sliding groove (521), the two first shifting rods (522) being installed at positions symmetrical to the first sliding groove (521), and the two first shifting rods (522) both being in contact with the filter element (8); The inner walls of both ends of the filter pipe (4) are fixedly connected to a support frame (41), a first connecting rod (51) passes through the support frame (41), and both ends of the first connecting rod (51) are fixedly connected to a first limiting platform (53). A first spring (54) is provided between the first limiting platform (53) and the support frame (41), and the first spring (54) maintains the position of the first connecting rod (51). The connecting member (3) is slidably connected to a first intermediate rod (55) slidably connected to the first connecting rod (51), and the first intermediate rod (55) is connected to the first connecting rod (51) via a first tension spring (57); The clamping assembly (6) includes a connecting plate (42) connected to the support frames (41) at both ends, a clamping rod (67) passing through and slidably connected to the connecting plate (42), a clamping plate (63) fixedly connected to the end of the clamping rod (67), a second rotating block (62) rotatably connected to the clamping rod (67), a second shifting rod (621) fixedly connected to the second rotating block (62), and a second connecting rod (61) passing through and slidably connected to the support frame (41), the second rotating block (62) is provided with a second sliding groove (622), the second connecting rod (61) is slidably connected to the second sliding groove (622), the installation positions of the two second shifting rods (621) are symmetrical about the second sliding groove (622), the end of the second shifting rod (621) is provided with a roller (623) abutting against the connecting plate (42), a preload spring (64) is provided between the clamping plate (63) and the connecting plate (42), and the preload spring (64) forces the clamping plate (63) toward the filter element (8); The second connecting rod (61) is provided with a second limiting platform (65), and a second spring (66) is provided between the second limiting platform (65) and the support frame (41). The second spring (66) maintains the position of the second connecting rod (61), and the first connecting rod (51) is fixedly connected to the second connecting rod (61); The connecting member (3) is provided with an annular groove (32), the annular groove (32) is clamped with an annular block (96), the annular block (96) is fixedly connected to a pull rod (95), the filter pipe (4) is fixedly connected to a guide ring (99), the pull rod (95) passes through the guide ring (99), the filter pipe (4) is fixedly connected to a fixed block (9), a slide rail (11) is provided on the frame (1), the slide rail (11) is slidably connected to the fixed block (9), the fixed block (9) is slidably connected to a third connecting rod (92), both ends of the third connecting rod (92) pass through the fixed block (9), the third connecting rod (92) is slidably connected to the pull rod (95), and the end of the third connecting rod (92) is connected to the pull rod (95) through a second tension spring (98); The third connecting rod (92) is fixedly connected to the third limiting platform (921) at both ends, and a third spring (94) is provided between the third limiting platform (921) and the fixed block (9), and the third spring (94) maintains the position of the third connecting rod (92). The pull rod (95) is provided with a fourth spring (97), and the fourth spring (97) is located between the annular block (96) and the guide ring (99), and the fourth spring (97) maintains the position of the pull rod (95). The fixed block (9) is fixedly connected to the first motor (91), and the output end of the first motor (91) is fixedly connected to the half gear (93), and the third connecting rod (92) is provided with a rack (922) meshing with the half gear (93); The side surface of the connecting member (3) is mounted with an annular worm gear (14), the frame (1) is mounted with a worm (12) capable of meshing with the annular worm gear (14), the frame (1) is mounted with a second motor (13) for driving the worm gear (12) to rotate, the side surface of the connecting member (3) is fixedly connected with a gear ring (16), the frame (1) is mounted with a driving gear meshing with the gear ring (16), and the frame (1) is mounted with a third motor (15) for providing power to the driving gear; The connecting piece (3) is provided with a stepped portion, the stepped portion is provided with an annular rubber (44), the support frame (41) is fixedly connected to a first barrel ring (45), the first barrel ring (45) is threadedly connected to a second barrel ring (43), the second barrel ring (43) is fixedly connected to the annular rubber (44), and the connecting piece (3) is connected to the annular rubber (44) by a sliding key; When the filter element (8) needs to be replaced, the second motor (13) is started, and the second motor (13) drives the worm (12) to rotate. Since the circumferential rotation of the filter pipe (4) is limited, the annular worm wheel (14) on the connecting member (3) engaged with the worm (12) climbs along the worm (12), thereby driving the filter pipe (4) to move on the frame (1), causing the filter pipe (4) to deviate from the joint (2), thereby facilitating the subsequent replacement operation of the filter element (8); The first motor (91) drives the half gear (93) to rotate, and the half gear (93) engages with the rack (922) on the third connecting rod (92) to drive the third connecting rod (92) to move. When the third connecting rod (92) moves upward, due to the elastic characteristics of the second tension spring (98), only the upper connecting member (3) can move upward. This connecting member (3) drives the parts connected to it to move. The annular groove (32) of the connecting member (3) is engaged with the annular block (96). The pull rod (95) passes through the guide ring (99) and is slidably connected to the third connecting rod (92) and is connected through the second tension spring (98) to form an elastic connection system. At the same time, the first intermediate rod (55) slidably connected to the connecting member (3) is connected to the first connecting rod (51) through the first tension spring (57), and the first The tension spring (57) has a greater elastic force than the first spring (54). When the lower connecting member (3) moves downward, the lower first intermediate rod (55) drives the first connecting rod (51) to overcome the force of the first spring (54) and move downward through the first tension spring (57). The upper first tension spring (57) is stretched, causing the first connecting rod (51) to move downward as a whole and drive the first rotating block (52) to rotate. The ends of the two first shifting rods (522) in a V-shaped structure on the first rotating block (52) abut against the filter element (8) and perform an arc shift, thereby realizing the outward movement of the filter element (8). When the lower connecting member (3) is reset upward, the first tension spring (57) is relaxed and reset, and the first spring (54) is deformed and reset, causing the first connecting rod (51) to reset upward and drive the first rotating block (52) to rotate in the opposite direction. The clamping plate (63) clamps the filter element (8) toward the filter element (8) under the action of the preload spring (64). When the second connecting rod (61) drives the second rotating block (62) to rotate, the roller (623) at the end of the second lever (621) of the second rotating block (62) abuts against the connecting plate (42), so that the abutting rod (67) drives the clamping plate (63) to move away from the filter element (8), thereby releasing the lock on the filter element (8); when the second connecting rod (61) is reset, the preload spring (64) resets the clamping plate (63), so that the two second levers (621) continue to abut against the connecting plate (42), and the second connecting rod (61) and the first connecting rod (51) are fixedly connected through the connecting block (56), so that the two can move synchronously; When the second motor (13) rotates in the forward direction, the connecting member (3) drives the second barrel ring (43) to rotate, so that the second barrel ring (43) drives the annular rubber (44) to move upward to seal the connection between the connecting member (3) and the joint (2) and restrict the movement of the filter pipe (4), thereby providing sealing and stability guarantees for some operations during the replacement process of the filter element (8).

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