Nanofiltration membrane flushing device

Abstract

The utility model discloses a nanofiltration membrane flushing device, which relates to the technical field of water filtering equipment, and comprises a nanofiltration membrane filter cartridge, the lower end of the nanofiltration membrane filter cartridge is fixedly provided with a bottom shell through a screw, the lower end of the bottom shell is fixedly provided with a blow-off pipe, the outer side of the blow-off pipe is provided with a second electric control valve, and the blow-off pipe is provided with a first electric control valve. The upper half part of one side of the nanofiltration membrane filter cartridge is fixedly connected with a filter membrane water outlet pipe, the lower half part of one side of the nanofiltration membrane filter cartridge is fixedly connected with a filter membrane water inlet pipe, and first electric control valves are arranged on the outer sides of the filter membrane water inlet pipe and the filter membrane water outlet pipe. By adopting the structure, the push block is pushed to slide on the L-shaped frame by starting the output end of the electric push rod, so that the rack on the push block is meshed with the transmission gear, and meanwhile, the cleaning spray pipe connected with the gear rotates on the mounting shell, so that the blocked surface of a nanofiltration membrane filter element in the nanofiltration membrane filter cartridge can be rotationally washed; therefore, the cleaning effect on the nanofiltration membrane filter element in the nanofiltration membrane filter cartridge can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water filtering equipment, and particularly relates to a nanofiltration membrane flushing device. Background Art

[0002] Water is an important component of nature. The reuse of water is an important way to alleviate the shortage of water resources. The reuse of water resources requires the use of hollow fiber nanofiltration membranes. Hollow fiber membranes refer to self-supporting membranes that are fibrous in appearance. Hollow fiber membranes are fiber filaments with hollow inner cavities made of dimethylacetamide as the main raw material, and have selective permeability. Nanofiltration membranes are functional semipermeable membranes that allow solvent molecules or certain low molecular weight solutes or low-valent ions to pass through. It is a special and promising separation membrane variety, usually used to remove organic matter from surface water and remove the hardness of groundwater.

[0003] A Chinese patent with publication number CN218981108U discloses a recyclable hollow fiber nanofiltration membrane structure, comprising an external frame, a plurality of nanofiltration membrane cartridges are installed inside the external frame, a nanofiltration membrane body is arranged inside the nanofiltration membrane cartridge, a membrane water inlet pipe is installed on the outer wall of the lower end of the nanofiltration membrane cartridge, a membrane water outlet pipe is installed on the outer wall of the upper end of the nanofiltration membrane cartridge, a cartridge top seat is installed on the upper end of the nanofiltration membrane cartridge, a flushing component is connected to the cartridge top seat, a cartridge base is installed on the lower end of the nanofiltration membrane cartridge, and a discharge component is connected to the cartridge base.

[0004] The nanofiltration membrane structure in the above-mentioned prior art can flush the nanofiltration membrane through the flushing nozzle installed in the top seat of the filter cartridge. However, during actual use, we found that the structure of the flushing nozzle is single and can only flush the part of the nanofiltration membrane close to the nozzle very cleanly, while other parts of the nanofiltration membrane installed in the nanofiltration membrane cartridge will not be flushed thoroughly. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a nanofiltration membrane flushing device to solve the problems mentioned in the background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A nanofiltration membrane flushing device comprises a nanofiltration membrane filter cartridge, a bottom shell is fixedly installed at the lower end of the nanofiltration membrane filter cartridge by screws, a sewage pipe is fixedly installed at the lower end of the bottom shell, a second electric control valve is arranged on the outer side of the sewage pipe, a filter membrane outlet pipe is fixedly connected to the upper half of one side of the nanofiltration membrane filter cartridge, a filter membrane inlet pipe is fixedly connected to the lower half of one side of the nanofiltration membrane filter cartridge, a first electric control valve is arranged on the outer side of the filter membrane inlet pipe and the filter membrane outlet pipe, a nanofiltration membrane filter element is fixedly installed on the inner side of the nanofiltration membrane filter cartridge, a mounting shell is fixedly installed on the upper end of the nanofiltration membrane filter cartridge, a cleaning nozzle is rotatably connected to the inner side of the lower end of the mounting shell, a cleaning pipe joint is fixedly installed on the inner side of the upper end of the mounting shell, the lower end of the cleaning pipe joint is rotatably connected to the inner side of the upper end of the cleaning nozzle, and a rotating mechanism is fixedly installed on the outer side of the cleaning nozzle;

[0008] The rotating mechanism includes a mounting hole, which is symmetrically arranged on the inner side of the mounting shell. An L-shaped frame is fixedly installed on the inner side of the mounting hole. An electric push rod is fixedly installed on the right end of the L-shaped frame. The output end of the electric push rod movably passes through the right end frame wall of the L-shaped frame and is fixedly installed with a push block. The push block is slidably connected to the upper end of the L-shaped frame. A rack is fixedly installed on the front side of the push block. A gear is fixedly installed on the outer side of the cleaning nozzle. The gear and the rack are meshingly connected. Through the rotating mechanism, the cleaning nozzle can be conveniently rotated and flushed on the blocked surface of the inner wall of the nanofiltration membrane cartridge.

[0009] As an optimal technical solution, a Y-type filter is fixedly installed on one end of the sewage pipe away from the bottom shell, and a connecting pipe is fixedly installed on the other end of the Y-type filter away from the sewage pipe. The Y-type filter connected to the sewage pipe can facilitate filtering of the flushing sewage discharged from the sewage pipe.

[0010] As an optimal technical solution, a first flange is welded to the outer wall of the upper end of the nanofiltration membrane cartridge, and a second flange is welded to the lower end of the mounting shell. The first flange is fixedly installed by screws and the second flange. A sealing groove is provided at the upper end of the first flange, and the lower end of the second flange is plugged into the sealing groove. The second flange and the first flange facilitate the connection and installation of the mounting shell and the nanofiltration membrane cartridge.

[0011] As an optimal technical solution, the lower end of the cleaning nozzle is closed, the nozzle of the cleaning nozzle is tilted downward, a sealed bearing is provided on the inner side of the upper end of the cleaning nozzle, the inner side of the upper end of the cleaning nozzle is rotatably connected to the lower end outer wall of the cleaning pipe joint through the sealed bearing, and a bracket is fixed on the inner side of the nanofiltration membrane filter cartridge by screws, and the upper end of the cleaning nozzle is rotatably connected to the inner side of the upper end of the bracket. By tilting the nozzle of the cleaning nozzle downward, it is convenient and better to clean the stains on the blocked surface of the nanofiltration membrane filter element.

[0012] As a preferred technical solution, a dovetail groove is provided at the upper end of the L-shaped frame, and the lower end of the push block is slidably connected to the inner side of the dovetail groove. Through the dovetail groove, the push block can slide on the L-shaped frame conveniently.

[0013] In summary, the utility model mainly has the following beneficial effects:

[0014] First, the push block is pushed on the L-shaped frame by starting the output end of the electric push rod, so that the rack on the push block engages with the transmission gear, and at the same time, the cleaning nozzle connected to the gear rotates on the mounting shell, which can rotate and flush the blocked surface of the nanofiltration membrane filter element in the nanofiltration membrane filter cartridge, thereby greatly improving the cleaning effect of the nanofiltration membrane filter element in the nanofiltration membrane filter cartridge;

[0015] Second, the second flange on the mounting shell and the first flange on the nanofiltration membrane cartridge can facilitate disassembly between the mounting shell and the nanofiltration membrane cartridge, and it is also convenient to maintain the cleaning nozzle extending into the nanofiltration membrane cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the nanofiltration membrane cartridge of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the rotating mechanism of the utility model;

[0019] Figure 4 The utility model Figure 3 Enlarged view of point A in the middle.

[0020] Figure numerals: 1. nanofiltration membrane cartridge, 2. membrane water inlet pipe, 3. membrane water outlet pipe, 4. first electric-controlled valve, 5. bottom shell, 6. drain pipe, 7. second electric-controlled valve, 8. connecting pipe, 9. Y-type filter, 10. first flange, 11. second flange, 12. cleaning pipe joint, 13. mounting shell, 14. cleaning nozzle, 15. rotating mechanism, 151. gear, 152. L-shaped frame, 153. electric push rod, 154. push block, 155. rack, 156. mounting hole, 16. nanofiltration membrane filter element, 17. sealing groove, 18. sealing bearing, 19. bracket, 20. dovetail groove. DETAILED DESCRIPTION

[0021] refer to Figures 1 to 4A nanofiltration membrane flushing device described in this embodiment includes a nanofiltration membrane filter cartridge 1, a bottom shell 5 is fixedly installed at the lower end of the nanofiltration membrane filter cartridge 1 by screws, a sewage pipe 6 is fixedly installed at the lower end of the bottom shell 5, and a second electric-controlled valve 7 is arranged on the outer side of the sewage pipe 6, a filter membrane outlet pipe 3 is fixedly connected to the upper half of one side of the nanofiltration membrane filter cartridge 1, a filter membrane inlet pipe 2 is fixedly connected to the lower half of one side of the nanofiltration membrane filter cartridge 1, and a first electric-controlled valve 4 is arranged on the outer sides of the filter membrane inlet pipe 2 and the filter membrane outlet pipe 3, a nanofiltration membrane filter element 16 is fixedly installed on the inner side of the nanofiltration membrane filter cartridge 1, a mounting shell 13 is fixedly installed on the upper end of the nanofiltration membrane filter cartridge 1, a cleaning nozzle 14 is rotatably connected to the inner side of the lower end of the mounting shell 13, and the upper end of the mounting shell 13 A cleaning pipe joint 12 is fixedly installed on the inner side, and the lower end of the cleaning pipe joint 12 is rotatably connected to the inner side of the upper end of the cleaning nozzle 14, and a rotating mechanism 15 is fixedly installed on the outer side of the cleaning nozzle 14; the water inlet of the filter membrane inlet pipe 2 is filtered from the inner wall of the nanofiltration membrane filter element 16 in the nanofiltration membrane filter cartridge 1, and the water on the outer wall of the nanofiltration membrane filter element 16 is discharged through the filter membrane outlet pipe 3; the upper end of the nanofiltration membrane filter element 16 is plugged with the lower end of the mounting shell 13, and the sealing is achieved after the mounting shell 13 and the nanofiltration membrane filter cartridge 1 are fixed; the shape of the nanofiltration membrane filter element 16 is gourd-shaped, with the upper and lower ends being equal in size and the middle part being small, so the gap between the middle part and the nanofiltration membrane filter cartridge 1 can be used to discharge the filtered water, which is a prior art and will not be described in detail here;

[0022] The rotating mechanism 15 includes a mounting hole 156, which is symmetrically arranged on the inner side of the mounting shell 13. An L-shaped frame 152 is fixedly installed on the inner side of the mounting hole 156. An electric push rod 153 is fixedly installed on the right end of the L-shaped frame 152. The output end of the electric push rod 153 movably penetrates the right end frame wall of the L-shaped frame 152 and is fixedly installed with a push block 154. The push block 154 is slidably connected to the upper end of the L-shaped frame 152. A rack 155 is fixedly installed on the front of the push block 154. A gear 151 is fixedly installed on the outer side of the cleaning nozzle 14. The gear 151 and the rack 155 are meshingly connected. The push block 154 is pushed to slide on the L-shaped frame 152 by the output end of the electric push rod 153, so that the rack 155 on the push block 154 meshes with the transmission gear 151. At the same time, the cleaning nozzle 14 connected to the gear 151 rotates on the mounting shell 13, and the blocked surface of the nanofiltration membrane filter element 16 in the nanofiltration membrane cartridge 1 can be rotated and flushed.

[0023] refer to Figure 1 A Y-type filter 9 is fixedly installed at one end of the sewage pipe 6 away from the bottom shell 5, and a connecting pipe 8 is fixedly installed at one end of the Y-type filter 9 away from the sewage pipe 6. The Y-type filter 9 connected to the sewage pipe 6 can be used to conveniently filter and collect impurities in the sewage.

[0024] refer to Figure 2 and Figure 3A first flange 10 is welded on the outer wall of the upper end of the nanofiltration membrane cartridge 1, and a second flange 11 is welded on the lower end of the mounting shell 13. The first flange 10 is fixedly installed with the second flange 11 by screws. A sealing groove 17 is provided on the upper end of the first flange 10, and the lower end of the second flange 11 is plugged and connected with the sealing groove 17. The mounting shell 13 and the nanofiltration membrane cartridge 1 can be conveniently disassembled and assembled by utilizing the second flange 11 on the mounting shell 13 and the first flange 10 on the nanofiltration membrane cartridge 1; a sealing ring is also provided on the inner side of the sealing groove 17, which is squeezed to achieve sealing after the first flange 10 and the second flange 11 are fixed.

[0025] refer to Figure 3 The lower end of the cleaning nozzle 14 is closed, and the nozzle of the cleaning nozzle 14 is tilted downward. A sealing bearing 18 is provided on the inner side of the upper end of the cleaning nozzle 14. The inner side of the upper end of the cleaning nozzle 14 is rotatably connected to the outer wall of the lower end of the cleaning pipe joint 12 through the sealing bearing 18. A bracket 19 is fixedly installed on the inner side of the nanofiltration membrane filter cartridge 1 by screws. The upper end of the cleaning nozzle 14 is rotatably connected to the inner side of the upper end of the bracket 19. The oblique downward nozzle of the cleaning nozzle 14 can be used to conveniently and quickly flush the blocked surface of the nanofiltration membrane filter element 16. The lower end of the cleaning pipe joint 12 rotates at the sealing bearing 18 on the cleaning nozzle 14 to ensure its sealing effect. , and the lower end of the cleaning nozzle 14 rotates at the bracket 19 installed in the nanofiltration membrane cartridge 1, which can improve the stability of the cleaning nozzle 14; the cleaning nozzle 14 is limited and rotated on the inner side of the lower end of the mounting shell 13, and a sealing disk is also installed at the lower end of the mounting shell 13 near the cleaning nozzle 14, and a sealing bearing 18 is also installed at the center of the sealing disk. The end of the cleaning nozzle 14 close to the mounting shell 13 rotates at the sealing bearing 18, which ensures the rotation effect of the cleaning nozzle 14 while ensuring its sealing; a one-way valve is also provided in the nozzle of the cleaning nozzle 14. When not flushing, outside water cannot enter the cleaning nozzle 14. Only when flushing, the water pressure impact can spray water outward.

[0026] refer to Figure 4 A dovetail groove 20 is provided at the upper end of the L-shaped frame 152, and the lower end of the push block 154 is slidably connected to the inner side of the dovetail groove 20. By sliding the push block 154 in the dovetail groove 20 on the L-shaped frame 152, the stability of the push block 154 can be ensured, and the push block 154 can be prevented from falling off the L-shaped frame 152.

[0027] Principle and advantages of use: When in use, water is introduced into the nanofiltration membrane cartridge 1 through the membrane water inlet pipe 2, and the inlet water is filtered through the inner ring surface of the nanofiltration membrane filter element 16, and then drained through the outer ring and discharged through the membrane water outlet pipe 3. When it is necessary to flush the blocked surface of the inner wall of the nanofiltration membrane filter element 16;

[0028] During flushing, the first electrically controlled valve 4 is completely closed, the second electrically controlled valve 7 is opened, and the push block 154 is pushed to slide on the L-shaped frame 152 through the output end of the electric push rod 153, so that the rack 155 on the push block 154 engages with the transmission gear 151. At the same time, the cleaning nozzle 14 connected to the gear 151 rotates on the mounting shell 13, and the upper end of the cleaning pipe joint 12 is connected to the external water delivery pipe to deliver water to the cleaning nozzle 14. The cleaning water can quickly flush the blockages on the filter surface of the nanofiltration membrane filter element 16 through a row of external inclined nozzles and discharge it through the sewage pipe 6 connected to the bottom shell 5.

Claims

1. A nanofiltration membrane flushing device, comprising a nanofiltration membrane cartridge (1), characterized in that: The lower end of the nanofiltration membrane cartridge (1) is fixedly mounted with a bottom shell (5) by means of screws, the lower end of the bottom shell (5) is fixedly mounted with a sewage discharge pipe (6), the outer side of the sewage discharge pipe (6) is provided with a second electrically controlled valve (7), the upper half of one side of the nanofiltration membrane cartridge (1) is fixedly connected with a membrane outlet pipe (3), the lower half of one side of the nanofiltration membrane cartridge (1) is fixedly connected with a membrane inlet pipe (2), the outer sides of the membrane inlet pipe (2) and the membrane outlet pipe (3) are both provided with a first electrically controlled valve (4), the A nanofiltration membrane filter element (16) is fixedly mounted on the inner side of the nanofiltration membrane filter cartridge (1); a mounting shell (13) is fixedly mounted on the upper end of the nanofiltration membrane filter cartridge (1); a cleaning nozzle (14) is rotatably connected to the inner side of the lower end of the mounting shell (13); a cleaning pipe joint (12) is fixedly mounted on the inner side of the upper end of the mounting shell (13); the lower end of the cleaning pipe joint (12) is rotatably connected to the inner side of the upper end of the cleaning nozzle (14); and a rotating mechanism (15) is fixedly mounted on the outer side of the cleaning nozzle (14); The rotating mechanism (15) comprises a mounting hole (156), wherein the mounting hole (156) is symmetrically arranged on the inner side of the mounting shell (13); an L-shaped frame (152) is fixedly mounted on the inner side of the mounting hole (156); an electric push rod (153) is fixedly mounted on the right end of the L-shaped frame (152); an output end of the electric push rod (153) movably penetrates through the right end frame wall of the L-shaped frame (152) and is fixedly mounted with a push block (154); the push block (154) is slidably connected to the upper end of the L-shaped frame (152); a rack (155) is fixedly mounted on the front side of the push block (154); a gear (151) is fixedly mounted on the outer side of the cleaning nozzle (14); the gear (151) and the rack (155) are meshingly connected.

2. A nanofiltration membrane flushing device according to claim 1, characterized in that: A Y-type filter (9) is fixedly mounted on one end of the sewage pipe (6) away from the bottom shell (5), and a connecting pipe (8) is fixedly mounted on one end of the Y-type filter (9) away from the sewage pipe (6).

3. A nanofiltration membrane flushing device according to claim 1, characterized in that: A first flange (10) is welded to the outer wall of the upper end of the nanofiltration membrane cartridge (1), and a second flange (11) is welded to the lower end of the mounting shell (13); the first flange (10) is fixedly mounted with screws and the second flange (11).

4. A nanofiltration membrane flushing device according to claim 3, characterized in that: A sealing groove (17) is provided at the upper end of the first flange (10), and the lower end of the second flange (11) is plug-fitted and connected to the sealing groove (17).

5. A nanofiltration membrane flushing device according to claim 1, characterized in that: The lower end of the cleaning nozzle (14) is closed, and the nozzle of the cleaning nozzle (14) is inclined downward.

6. A nanofiltration membrane flushing device according to claim 1, characterized in that: A sealing bearing (18) is provided on the inner side of the upper end of the cleaning nozzle (14), and the inner side of the upper end of the cleaning nozzle (14) is rotatably connected to the outer wall of the lower end of the cleaning pipe joint (12) via the sealing bearing (18). A bracket (19) is fixedly mounted on the inner side of the nanofiltration membrane cartridge (1) by screws, and the upper end of the cleaning nozzle (14) is rotatably connected to the inner side of the upper end of the bracket (19).

7. A nanofiltration membrane flushing device according to claim 1, characterized in that: The upper end of the L-shaped frame (152) is provided with a dovetail groove (20), and the lower end of the push block (154) is slidably connected to the inner side of the dovetail groove (20).

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