High-efficiency energy-saving reciprocating split type ultrafiltration system

Abstract

The invention discloses a high-efficiency energy-saving reciprocating split type ultrafiltration system which comprises an ultrafiltration membrane group box body and a skid-mounted rack, a plurality of membrane module membrane collecting frames are arranged in the ultrafiltration membrane module box body, a first driving component for driving each membrane module membrane collecting frame to synchronously reciprocate back and forth is arranged behind each of two sides of the top of the ultrafiltration membrane module box body, and a water producing pipe is arranged at the top of each membrane module membrane collecting frame. The split-type ultrafiltration system which is efficient, energy-saving and extremely high in anti-pollution capacity is realized through mechanical and electrical integration design. Through modular customization of the ultrafiltration membrane group box body and the skid-mounted rack, the device is small in occupied area, convenient to mount and maintain and suitable for water treatment projects of different scales and water qualities, can be adopted from small-scale domestic wastewater and kitchen leachate to large-scale industrial and municipal water treatment, and can meet the water treatment requirements of different occasions at the same time.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, specifically to a high-efficiency, energy-saving reciprocating split-type ultrafiltration system. Background Technology

[0002] Ultrafiltration technology, as an advanced membrane separation technology, has been widely used in water treatment in recent years. Its basic principle is to use the pressure difference across the ultrafiltration membrane as the driving force to remove large molecular impurities such as suspended solids, colloids, bacteria, and viruses from the water, while allowing water molecules, inorganic salts, and small organic molecules to permeate, thereby purifying the water. Traditional ultrafiltration equipment often suffers from high energy consumption, large footprint, and difficult operation and maintenance. Furthermore, the ultrafiltration membrane in traditional equipment is often stationary, while research shows that static ultrafiltration membranes are less effective than those that are constantly in motion. Therefore, improving the ultrafiltration membrane from static purification to dynamic purification is a current need.

[0003] Traditional ultrafiltration systems rely on high-speed cross-flow or intermittent backwashing to reduce fouling. However, by reciprocating the membrane module, extremely high instantaneous shear forces, intense turbulence, and strong local pressure fluctuations are generated on the membrane surface. This effectively removes contaminants from the membrane surface, preventing their deposition and the formation of a dense filter cake. This reduces the frequency of backwashing, increasing membrane module lifespan and performance. Although driving the membrane frame requires energy, the overall energy consumption is generally lower compared to the high-pressure circulating pumps or large-bubble aeration required to maintain traditional external pressure or submerged ultrafiltration systems. It avoids the significant pump energy consumption required to generate high cross-flow velocities; energy is directly used to clean the membrane surface, resulting in higher efficiency.

[0004] However, the effect of using only unidirectional reciprocating motion is limited. Improving the motion diversity of the membrane module would further enhance its performance. In existing research, utility model patent CN218393119U discloses a circulating filtration device for pullulan production based on an ultrafiltration membrane. This device includes a filter box with a piston plate installed inside. An ultrafiltration membrane plate is detachably installed inside the filter box. Multiple L-shaped fixing plates are fixedly connected to the side walls of the filter box, and a top plate is fixedly connected to the top of these L-shaped fixing plates. An electric cylinder is installed at the bottom of the top plate, and the telescopic end of the electric cylinder is fixed to the top of the piston plate. Two reciprocating screws are rotatably inserted through the filter box, with gear plates fixedly connected to both ends of the reciprocating screws. A gear plate is fixedly connected to the top of the piston plate, and the gear plate and gear plates mesh for transmission. A screw sleeve is rotatably connected to the periphery of the reciprocating screws. This device effectively avoids impurities clogging the ultrafiltration membrane, reducing the probability of membrane damage. However, in actual use, it is still not possible to achieve multi-directional dynamic activity of the ultrafiltration membrane. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a high-efficiency, energy-saving reciprocating split-type ultrafiltration system.

[0006] The technical solution of this invention is: A high-efficiency and energy-saving reciprocating split-type ultrafiltration system includes an ultrafiltration membrane module housing and a skid-mounted frame; The ultrafiltration membrane module housing includes several membrane module collection frames inside. Each of the two rear sides of the top of the ultrafiltration membrane module housing is provided with a first drive component for driving each membrane module collection frame to perform synchronous back-and-forth reciprocating motion. Each membrane module collection frame is provided with a product water pipe on its top. The membrane module collection frame contains several membrane modules, each containing ultrafiltration membrane fibers made of hydrophilic PTFE. The top of the membrane module collection frame has a crossbeam with an upper connecting rod at each end. The top of the ultrafiltration membrane module housing has a slide rail on each side, and the upper connecting rod passes through the slide rail and is slidably connected to the slide rail. The skid-mounted frame is located on one side of the ultrafiltration membrane module housing. The skid-mounted frame is equipped with a control cabinet and a product water pump connected to the product water pipe. On the side of the skid-mounted frame connected to the ultrafiltration membrane module housing, there is a second drive component for driving the membrane assembly frame of each membrane module to perform synchronous left and right reciprocating motion.

[0007] Furthermore, the permeate pipe is connected to the membrane assembly frame via a permeate flange, and a butterfly valve is provided on the permeate pipe before the permeate pump, and a check valve is provided on the permeate pipe after the permeate pump.

[0008] Note: The product water flange facilitates quick connection and disassembly of the membrane frame and product water pipe, making maintenance and replacement easier; the butterfly valve is used for isolation and flow regulation, and the check valve prevents product water backflow, protecting the product water pump and improving the safety and convenience of system operation.

[0009] Furthermore, an overflow pipe is provided on the upper part of one side of the ultrafiltration membrane module box, an air drain valve is provided on the bottom side of one side of the ultrafiltration membrane module box, a level gauge and a pH meter are provided on the top of the ultrafiltration membrane module box, and an inlet pipe is provided on one side of the top of the ultrafiltration membrane module box.

[0010] Note: The overflow pipe prevents the tank liquid level from becoming too high, ensuring operational safety; the drain valve facilitates complete system emptying for maintenance or freeze protection; the level gauge and pH meter enable automatic liquid level control and inlet water quality monitoring, providing data support for automated operation and process optimization.

[0011] Furthermore, the skid-mounted frame is also equipped with a backwash pump, a sludge return pump, and a backwash filter. The backwash pump is connected to the membrane module frame through a backwash pipe. The backwash pipe is equipped with butterfly valves before and after the backwash pump, and a check valve is equipped after the backwash pump. The backwash pipe is also equipped with a float flow meter, and the bottom of the backwash pump is equipped with an empty ball valve.

[0012] Description: The backwash pump and filter are integrated on the skid-mounted frame to achieve a compact, integrated design. Backwashing is a necessary operation to maintain membrane performance, and integration facilitates automatic control. The sludge return pump can return or discharge concentrated sludge to maintain a stable suspended solids concentration in the tank and avoid over-concentration. The float flow meter and valves accurately monitor and control the backwash flow rate and process, improving backwash efficiency and saving water.

[0013] Furthermore, the first drive assembly includes an electric cylinder and a drive motor for driving the electric cylinder to move. The electric cylinder is fixedly connected to each of the upper connecting rods located on one side of the slide rail. The upper connecting rods are provided with a slot in the middle, and the slot is slidably connected to a groove provided in the middle of the slide rail.

[0014] Note: Compared to hydraulic or pneumatic systems, electric cylinders offer high control precision, fast response, cleanliness, and simple maintenance, making them ideal for reciprocating motions requiring precise control of stroke and frequency. The combination of slots and slides allows them to withstand significant lateral forces, ensuring that the upper connecting rod does not derail or jam during intense reciprocating motions, resulting in smooth operation.

[0015] Furthermore, the bottom of the upper connecting rod is rotatably connected to the lower connecting rod via a movable pivot. The bottom of the lower connecting rod is connected to the membrane assembly frame. The second drive assembly includes a drive turntable and a servo motor for driving the drive turntable to rotate. A fixed shaft is provided in the middle of the drive turntable. The top of the fixed shaft is connected to the output end of the bottom of the servo motor. Two approximately triangular limiting plates are symmetrically provided on both sides of the fixed shaft. The outer edges of the limiting plates are arc-shaped. When the drive turntable rotates, the inner limiting plate extends to the inner side above the ultrafiltration membrane assembly housing. The two limiting plates intermittently and alternately engage with the foremost lower connecting rod.

[0016] Explanation: The servo motor drives the turntable to rotate at a constant speed. The symmetrical arc-shaped limit plates on the turntable alternately contact the foremost lower connecting rod, pushing it to move left or right, thus achieving left and right reciprocating motion.

[0017] Preferably, the slide rail is mounted above the ultrafiltration membrane module housing, and the top of the lower connecting rod extends above the ultrafiltration membrane module housing to allow the limiting plate to dock with the lower connecting rod. The tops of each lower connecting rod are connected by a fixing rod to allow each membrane module to move synchronously left and right.

[0018] Note: The lower connecting rods are connected by a fixed rod. By simply pushing the foremost lower connecting rod, all the membrane frames can be moved left and right synchronously. This results in high transmission efficiency and a simplified structure.

[0019] Preferably, an auxiliary fixing plate is provided at the bottom of the fixed shaft, the fixed shaft is rotatably connected to the upper surface of the auxiliary fixing plate, the auxiliary fixing plate is fixedly connected to the side wall of the skid-mounted frame, and the servo motor is fixedly connected to the side wall of the skid-mounted frame through a fixing bracket.

[0020] Note: The stability of the second drive assembly is maintained by the auxiliary fixing plate and the fixing frame.

[0021] Furthermore, the membrane module assembly frame consists of 3 to 4 units, with each membrane module assembly frame containing 5 to 8 membrane modules arranged in a 5 to 8 × 5 to 8 configuration.

[0022] Explanation: By rationally controlling the number of membrane modules and their mounting frames, the processing capacity and driving load are balanced. By rationally controlling the arrangement of the membrane modules, sufficient flow space is ensured, achieving an optimal balance between the water flow generated by the reciprocating motion and the membrane area, thus avoiding a decrease in rinsing effect due to over-density packing.

[0023] The beneficial effects of this invention are: (1) The high-efficiency and energy-saving reciprocating split-type ultrafiltration system of the present invention achieves a highly efficient, energy-saving, and highly resistant to pollution split-type ultrafiltration system through mechatronics design. Through modular customization of the ultrafiltration membrane module box and skid-mounted frame as the main components, it occupies a small area, is easy to install and maintain, and is suitable for water treatment projects of different scales and water qualities. This equipment can be used for small-scale domestic wastewater and kitchen leachate to large-scale industrial and municipal water treatment, and also meets the water treatment needs of different occasions.

[0024] (2) The high-efficiency and energy-saving reciprocating split-type ultrafiltration system of the present invention achieves forward and backward reciprocating motion through a first driving component and left and right reciprocating motion through a second driving component. The two driving components work together to enable the membrane frame to perform bidirectional compound reciprocating motion in the horizontal plane. This breaks the fluid dead zone and fixed fouling layer that may be formed by traditional unidirectional vibration or cross-flow filtration, and generates extremely complex and high-intensity turbulence and shear force on the membrane surface, realizing active, three-dimensional, and dead-zone-free physical suppression of membrane fouling. Moreover, the reciprocating motion process is automatically controlled, reliable and durable, significantly reduces the membrane fouling rate, allows the system to operate stably at higher flux, and greatly extends the chemical cleaning cycle, reducing the use of chemicals and wastewater generation. Attached Figure Description

[0025] Figure 1 This is a front view of a high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to the present invention; Figure 2 This is a top view of the ultrafiltration membrane module housing of the present invention; Figure 3 This is a top view of the skid-mounted frame of the present invention; Figure 4This is a front view of the membrane module assembly frame of the present invention; Figure 5 This is a side view of the membrane assembly frame of the present invention in its normal state; Figure 6 This is a side view of the membrane module assembly frame of the present invention in an inclined state; Figure 7 This is a schematic diagram of the connection between the slide rail and the upper connecting rod of the present invention; Figure 8 This is a schematic diagram of the structure of the second driving component of the present invention; Figure 9 This is the main view of the second driving component of the present invention; Figure 10 This is a top view of the second drive component of the present invention.

[0026] Among them, 1-ultrafiltration membrane module housing, 11-slide rail, 111-slide groove, 12-overflow pipe, 13-drain valve, 14-level gauge, 15-pH meter, 16-inlet pipe, 2-skid-mounted frame, 21-control cabinet, 22-product water pump, 23-backwash pump, 24-sludge return pump, 25-backwash filter, 26-backwash pipe, 3-membrane module collector frame, 31-product water pipe, 32-crossbeam, 33-upper connecting rod, 331-slot, 332-movable rotating shaft, 34-lower connecting rod, 35-fixed rod, 4-membrane module, 5-first drive assembly, 51-electric cylinder, 52-drive motor, 6-second drive assembly, 61-drive turntable, 611-fixed shaft, 612-limit plate, 62-servo motor, 63-auxiliary fixing plate, 64-fixed frame. Detailed Implementation

[0027] Example 1 like Figure 2 and Figure 3 As shown, a high-efficiency and energy-saving reciprocating split-type ultrafiltration system includes an ultrafiltration membrane module housing 1 and a skid-mounted frame 2. like Figure 1 As shown, the ultrafiltration membrane module housing 1 includes 3 membrane module collection frames 3 inside. Each of the two rear sides of the top of the ultrafiltration membrane module housing 1 is provided with a first drive component 5 for driving each membrane module collection frame 3 to perform synchronous back-and-forth reciprocating motion. Each membrane module collection frame 3 is provided with a product water pipe 31 on the top. The product water pipe 31 is connected to the membrane module collection frame 3 through a product water flange. like Figure 1 and Figure 2 As shown, an overflow pipe 12 is provided on the upper part of one side of the ultrafiltration membrane module box 1, an air drain valve 13 is provided on the bottom side of one side of the ultrafiltration membrane module box 1, a level gauge 14 and a pH meter 15 are provided on the top inside the ultrafiltration membrane module box 1, and an inlet pipe 16 is provided on one side of the top inside the ultrafiltration membrane module box 1. like Figure 1 , Figure 2 and Figure 4 As shown, the membrane module assembly frame 3 houses a total of 120 membrane modules 4, with each assembly frame 3 containing 5 × 8 membrane modules 4, totaling 1080 m³. 2 The membrane, the membrane module 4 is equipped with ultrafiltration membrane fibers, the ultrafiltration membrane fibers are made of hydrophilic PTFE membrane, the membrane module collector 3 is equipped with a crossbeam 32 at the top, and an upper connecting rod 33 is provided at each end of the crossbeam 32. The ultrafiltration membrane module box 1 is equipped with a slide rail 11 on each side of the top, and the upper connecting rod 33 passes through the slide rail 11 and is slidably connected to the slide rail 11. like Figure 3 As shown, the skid-mounted frame 2 is located on one side of the ultrafiltration membrane module housing 1. The skid-mounted frame 2 is equipped with a control cabinet 21 and a permeate pump 22 connected to the permeate pipe 31. A butterfly valve is provided on the permeate pipe 31 in front of the permeate pump 22, and a check valve is provided on the permeate pipe 31 in front of the permeate pump 22. The skid-mounted frame 2 is also equipped with a backwash pump 23, a sludge return pump 24, and a backwash filter 25. The backwash pump 23 is connected to the membrane module collector frame 3 through a backwash pipe 26. A butterfly valve is provided on the backwash pipe 26 in front of and behind the backwash pump 23, and a check valve is provided on the backwash pipe 26 in front of the backwash pump 23. A float flow meter is also provided on the backwash pipe 26. An empty ball valve is provided at the bottom of the backwash pump 23. A second drive component 6 is provided on the side of the skid-mounted frame 2 connected to the ultrafiltration membrane module housing 1 to drive the membrane module collector frames 3 to make synchronous left and right reciprocating motion. like Figure 1 , Figure 2 and Figure 7 As shown, the first drive assembly 5 includes an electric cylinder 51 and a drive motor 52 for driving the electric cylinder 51 to move. The electric cylinder 51 and the drive motor 52 are commercially available products. The electric cylinder 51 is fixedly connected to each upper connecting rod 33 located on a slide rail 11 on one side. The upper connecting rod 33 has a slot 331 in the middle. The slot 331 is slidably connected to the slide groove 111 in the middle of the slide rail 11. The bottom of the upper connecting rod 33 is rotatably connected to a lower connecting rod 34 through a movable rotating shaft 332. The bottom of the lower connecting rod 34 is connected to the membrane assembly frame 3. like Figure 1 , Figures 8-10As shown, the second drive assembly 6 includes a drive turntable 61 and a servo motor 62 for driving the drive turntable 61 to rotate. The servo motor 62 is a commercially available servo motor. A fixed shaft 611 is provided in the middle of the drive turntable 61. The top of the fixed shaft 611 is connected to the output end of the bottom of the servo motor 62. Two approximately triangular limiting plates 612 are symmetrically provided on both sides of the fixed shaft 611. The outer edges of the limiting plates 612 are arc-shaped. When the drive turntable 61 rotates, the inner limiting plate 612 extends to the inner side above the ultrafiltration membrane module housing 1. The two limiting plates 612 and the foremost lower limiting plate 612 are connected. The connecting rods 34 are intermittently and alternately connected. The slide rail 11 is mounted above the ultrafiltration membrane module housing 1. The top of the lower connecting rod 34 is higher than the ultrafiltration membrane module housing 1, which is used to enable the limiting plate 612 to connect with the lower connecting rod 34. The tops of each lower connecting rod 34 are connected by a fixing rod 35, which is used to enable each membrane module collection frame 3 to move back and forth synchronously. An auxiliary fixing plate 63 is provided at the bottom of the fixing shaft 611. The fixing shaft 611 is rotatably connected to the upper surface of the auxiliary fixing plate 63. The auxiliary fixing plate 63 is fixedly connected to the side wall of the skid frame 2. The servo motor 62 is fixedly connected to the side wall of the skid frame 2 through the fixing frame 64. It should be noted that: the slide rail 11 is about 40~50cm higher than the ultrafiltration membrane module housing 1, the upper connecting rod 33 is about 20~30cm long, the top of the lower connecting rod 34 is about 10~15cm higher than the ultrafiltration membrane module housing 1, and the driving turntable 61 of the second driving component 6 corresponds to the position where the top of the lower connecting rod 34 is higher than the ultrafiltration membrane module housing 1.

[0028] Example 2 The difference between this embodiment and Embodiment 1 is that: The ultrafiltration membrane module housing 1 contains 4 membrane module collection frames 3.

[0029] Example 3 The difference between this embodiment and Embodiment 1 is that: The membrane module assembly frame 3 contains 90 membrane modules 4, with each membrane module assembly frame 3 containing 5 × 6 membrane modules 4.

[0030] Example 4 The difference between this embodiment and Embodiment 1 is that: The membrane module assembly frame 3 contains 144 membrane modules 4, with each membrane module assembly frame 3 containing 8 × 6 membrane modules 4.

[0031] Example 5 The difference between this embodiment and Embodiment 1 is that: The two limiting plates 612 intermittently and alternately engage with a lower connecting rod 34 located in the middle.

[0032] Example 6 The difference between this embodiment and Embodiment 1 is that: The two limit plates 612 intermittently and alternately engage with the rearmost lower connecting rod 34.

[0033] Example 7 The difference between this embodiment and Embodiment 1 is that: On the side where the skid-mounted frame 2 connects to the ultrafiltration membrane module housing 1, there are two second drive components 6 for driving the membrane module collection frame 3 to move synchronously left and right. The two limiting plates 612 of one of the second drive components 6 are intermittently and alternately docked with the lower connecting rod 34 located at the rear, and the two limiting plates 612 of the other second drive component 6 are intermittently and alternately docked with the lower connecting rod 34 at the front.

[0034] Note: The number of second drive components 6 is set reasonably according to the size of the ultrafiltration membrane module housing 1. If the ultrafiltration membrane module housing 1 is large, the number of membrane module collectors 3 will also be correspondingly large. The stability of the left and right reciprocating motion can be ensured by increasing the number of second drive components 6, and the solution in embodiment 7 is adopted. If the ultrafiltration membrane module housing 1 is small, or the number of membrane module collectors 3 is small, the solutions in embodiment 1, embodiment 5 or embodiment 6 are adopted.

[0035] Working principle: The working principle of a high-efficiency and energy-saving reciprocating integrated ultrafiltration equipment of the present invention will be briefly explained below.

[0036] During wastewater treatment, the feed liquid is pretreated and then enters the ultrafiltration membrane module housing 1. Under pressure, small molecules pass through the ultrafiltration membrane to become permeate, while large molecules are retained to form concentrate. The membrane module is backwashed and chemically cleaned regularly to maintain membrane performance and achieve efficient separation and purification. Because the membrane module collector 3 is constantly reciprocating, the backwashing frequency is much lower than that of other products on the market.

[0037] The membrane module's membrane holder 3 reciprocating motion has two directions: reciprocating motion in the front-to-back direction and reciprocating motion in the left-to-right direction. Reciprocating motion in the front and back direction: Turn on the drive motor 52, so that it drives each upper connecting rod 33 to reciprocate through the electric cylinder 51, thereby driving each membrane assembly frame 3 to reciprocate synchronously through the crossbeam 31 and the lower connecting rod 34.

[0038] Left-right reciprocating motion: Synchronized with the aforementioned front-back reciprocating motion. Taking Example 1 as an example, whenever the foremost lower connecting rod 34 moves to the position of the second drive assembly 6, the lower connecting rod 34 contacts the limiting plate 612 and gradually moves inward through the arc-shaped side of the limiting plate 612, that is, the membrane assembly collector 3 moves from... Figure 5 The state transitions to the middle state Figure 6In the intermediate state, until it no longer contacts the end of the limiting plate 612, and the cross-section of the end of the limiting plate 612 causes the lower connecting rod 34 to spring back. With the assistance of the movable rotating shaft 332 and driven by inertial force, the lower connecting rod 34 drives the entire membrane module collector 3 to sway left and right in the water. Each membrane module collector 3 sways left and right synchronously under the action of the fixed rod 35. At this time, the servo motor 62 is turned on, driving the drive turntable 61 to rotate 180°, so that the other limiting plate 612 faces the side where the ultrafiltration membrane module box 1 is located. When the lower connecting rod 34 at the front moves back to this position, it is pushed again in the same way as above, thereby replenishing the inertial force of the left and right swaying that is about to decay, and thus realizing continuous reciprocating left and right movement.

[0039] In the ultrafiltration process of the membrane module frame 3, the ultrafiltration membrane fibers inside the membrane module frame 3 play a core role. They can selectively permeate, allowing small molecules and water molecules in the liquid to be treated to pass through the membrane pores, while impurities larger than the membrane pore size, such as suspended particles, colloids, bacteria, viruses, and large organic molecules, are effectively retained.

[0040] Therefore, suction separation is completed by suction, purified permeate is formed inside the membrane, and concentrate is generated outside the membrane. The concentrate is periodically returned to the front end of the treatment liquid by sludge return pump 24 to ensure that the concentrate in the ultrafiltration membrane module box 1 is not too high, so as not to cause excessive fouling of the ultrafiltration membrane fibers, resulting in a surge in transmembrane pressure difference, which would affect permeate and cleaning and maintenance.

[0041] By connecting to the backwash pump 23 and the cleaning water tank, the control cabinet 21 performs periodic backwashing after a fixed water production cycle is controlled by the program. (It should be noted that the control cabinet 21 used in this application is a prior art control cabinet product. This application does not involve any improvement or innovation to the control program and control principle of the control cabinet 21. Those skilled in the art can select the corresponding control cabinet 21 to adapt to the ultrafiltration system of this application based on common sense. The connection method and control process between the control cabinet 21 and other components of the ultrafiltration system of this application are all prior art and will not be described in detail here.) The entire system is intelligently controlled by the control cabinet 21 inside the equipment. With a fixed water production and backwashing cycle, the ultrafiltration membrane module tank 1 is continuously fed water and sludge is returned under the liquid level monitoring feedback of the liquid level gauge 14, realizing automated, efficient, energy-saving, continuous and stable water production.

Claims

1. A high-efficiency, energy-saving reciprocating split-type ultrafiltration system, characterized in that, Includes an ultrafiltration membrane module housing (1) and a skid-mounted frame (2); The ultrafiltration membrane module housing (1) includes several membrane module collection frames (3). Each of the two rear sides of the top of the ultrafiltration membrane module housing (1) is provided with a first drive component (5) for driving each membrane module collection frame (3) to perform synchronous back-and-forth reciprocating motion. Each membrane module collection frame (3) is provided with a product water pipe (31) on its top. The membrane module collection frame (3) is provided with several membrane modules (4) inside. The membrane module (4) is provided with ultrafiltration membrane fibers. The ultrafiltration membrane fibers are hydrophilic PTFE membranes. The membrane module collection frame (3) is provided with a crossbeam (32) at the top. Each end of the crossbeam (32) is provided with an upper connecting rod (33). Each side of the top of the ultrafiltration membrane module box (1) is provided with a slide rail (11). The upper connecting rod (33) passes through the slide rail (11) and is slidably connected to the slide rail (11). The skid-mounted frame (2) is located on one side of the ultrafiltration membrane module housing (1). The skid-mounted frame (2) is equipped with a control cabinet (21) and a product water pump (22) connected to the product water pipe (31). The skid-mounted frame (2) is connected to the ultrafiltration membrane module housing (1) on one side and is equipped with a second drive component (6) for driving the membrane module collection frame (3) of each membrane module to make synchronous left and right reciprocating motion.

2. The high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to claim 1, characterized in that, The permeate pipe (31) is connected to the membrane assembly frame (3) via a permeate flange. A butterfly valve is provided on the permeate pipe (31) in front of the permeate pump (22), and a check valve is provided on the permeate pipe (31) in front of the permeate pump (22).

3. The high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to claim 1, characterized in that, An overflow pipe (12) is provided on the upper part of one side of the ultrafiltration membrane module box (1), an air drain valve (13) is provided on the bottom side of one side of the ultrafiltration membrane module box (1), a level gauge (14) and a pH meter (15) are provided on the top inside the ultrafiltration membrane module box (1), and an inlet pipe (16) is provided on one side of the top inside the ultrafiltration membrane module box (1).

4. The high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to claim 1, characterized in that, The skid-mounted frame (2) is also equipped with a backwash pump (23), a sludge return pump (24), and a backwash filter (25). The backwash pump (23) is connected to the membrane assembly frame (3) of the membrane module through a backwash pipe (26). The backwash pipe (26) is equipped with butterfly valves before and after the backwash pump (23), and a check valve is equipped on the backwash pipe (26) after the backwash pump (23). The backwash pipe (26) is also equipped with a float flow meter, and the bottom of the backwash pump (23) is equipped with an empty ball valve.

5. The high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to claim 1, characterized in that, The first drive assembly (5) includes an electric cylinder (51) and a drive motor (52) for driving the electric cylinder (51) to move. The electric cylinder (51) is fixedly connected to each of the upper connecting rods (33) located on the slide rail (11) on one side. The upper connecting rod (33) is provided with a slot (331) in the middle. The slot (331) is slidably connected to the slide groove (111) provided in the middle of the slide rail (11).

6. The high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to claim 5, characterized in that, The bottom of the upper connecting rod (33) is rotatably connected to the lower connecting rod (34) via a movable rotating shaft (332). The bottom of the lower connecting rod (34) is connected to the membrane assembly frame (3). The second driving assembly (6) includes a driving turntable (61) and a servo motor (62) for driving the driving turntable (61) to rotate. The driving turntable (61) has a fixed shaft (611) in the middle. The top of the fixed shaft (611) is connected to the output end of the bottom of the servo motor (62). Two approximately triangular limiting plates (612) are symmetrically arranged on both sides of the fixed shaft (611). The outer edge of the limiting plate (612) is arc-shaped. When the driving turntable (61) rotates, one of the limiting plates (612) located on the inner side extends to the inner side above the ultrafiltration membrane assembly box (1). The two limiting plates (612) are intermittently and alternately docked with the foremost lower connecting rod (34).

7. The high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to claim 6, characterized in that, The slide rail (11) is mounted above the ultrafiltration membrane module housing (1). The top of the lower connecting rod (34) extends above the ultrafiltration membrane module housing (1) to allow the limiting plate (612) to dock with the lower connecting rod (34). The tops of each lower connecting rod (34) are connected by a fixing rod (35) to allow each membrane module assembly frame (3) to move back and forth synchronously.

8. The high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to claim 6, characterized in that, The fixed shaft (611) is provided with an auxiliary fixing plate (63) at the bottom. The fixed shaft (611) is rotatably connected to the upper surface of the auxiliary fixing plate (63). The auxiliary fixing plate (63) is fixedly connected to the side wall of the skid frame (2). The servo motor (62) is fixedly connected to the side wall of the skid frame (2) through a fixing bracket (64).

9. The high-efficiency and energy-saving reciprocating split-type ultrafiltration system according to claim 1, characterized in that, The membrane assembly frame (3) consists of 3 to 4 units, and each membrane assembly frame (3) contains 5 to 8 membrane assemblies (4) arranged in a 5 to 8 × 5 to 8 configuration.

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