Tubular nanofiltration membrane for wastewater treatment

Abstract

The utility model relates to the technical field of tubular nanofiltration membranes, and discloses a tubular nanofiltration membrane for wastewater treatment, which comprises an end cover, a fixed cylinder and a tubular nanofiltration core rod, a buckling bowl is arranged in the end cover, the top end of the buckling bowl is communicated with a liquid inlet pipe, the liquid inlet pipe extends out of the end cover, the tubular nanofiltration core rod is arranged in the fixed cylinder, and the tubular nanofiltration core rod is arranged in the fixed cylinder. The bottom end of the tubular nanofiltration core rod is fixedly provided with a threaded pipe II, the threaded pipe II is in threaded connection with the inner wall of the fixed cylinder, and when the tubular nanofiltration core rod is replaced, only the rotating sleeve needs to be rotated to drive the threaded pipe I to rotate, the threaded pipe I is taken out from the end cover, and then the rotating sleeve slides down to drive the threaded pipe I to slide down to leak the tubular nanofiltration core rod; at the moment, the end cover is not connected with a fixed cylinder and a rotating sleeve which are used as an outer cylinder structure any more, the tubular nanofiltration core rod can be taken out by rotating the tubular nanofiltration core rod, the end cover does not need to be rotated in the whole process, and therefore the liquid inlet pipe can be a hard pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of tubular nanofiltration membranes, in particular to a tubular nanofiltration membrane for wastewater treatment. Background Art

[0002] Tubular nanofiltration membrane is a type of filter membrane with very small internal pores. When a certain pressure is generated at one end of the tubular nanofiltration membrane, the solute molecules in the water that are smaller than the internal pores can be screened out by the pressure. Therefore, this filter membrane can effectively filter wastewater impurities and is widely used in the treatment process of mine wastewater. However, mine wastewater has a lot of sediment and a high degree of pollution, and the filter material needs to be replaced frequently. In the existing technology, the filter material is replaced by replacing the entire filter rod, and the filter rod is composed of an outer shell and a filter element. In fact, only the filter element needs to be replaced, which causes a waste of outer shell material;

[0003] The existing Chinese patent CN213314348U discloses a tubular nanofiltration membrane assembly that is easy to replace. The tubular nanofiltration membrane assembly that is easy to replace is designed to be divided into two parts, namely, a fixed outer cylinder and a tubular nanofiltration core rod. The fixed outer cylinder can be permanently installed in the system as part of the filtration system hardware, and the tubular nanofiltration core rod is replaced regularly as a consumable, which greatly reduces the cost of consumables. In terms of structure, an upper buckle bowl and a lower buckle bowl are provided in the fixed outer cylinder, and the tubular nanofiltration core rod is fixedly connected by the two buckle bowls. This connection has good sealing performance, ensuring that the filtrate flow path is closed and will not pollute the filtered water;

[0004] The above-mentioned easily replaceable tubular nanofiltration membrane assembly permanently installs the fixed outer tube and the filtration system hardware together. When replacing the filter element, the end cover can only be rotated to drive the buckle bowl to rotate and unscrew the buckle bowl from the bundle tube. This means that the liquid inlet pipe connected to the end cover must be an elastic hose to ensure that the end cover can rotate normally. However, in the wastewater treatment system, the service life of the hose is significantly lower than that of the conventional hard water pipe, and when the water pressure is increased to improve the filtration effect, the hose is also prone to rupture. Utility Model Content

[0005] The purpose of the utility model is to provide a tubular nanofiltration membrane for wastewater treatment to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tubular nanofiltration membrane for wastewater treatment, comprising an end cap, a fixed cylinder, and a tubular nanofiltration core rod, wherein a buckle bowl is arranged inside the end cap, and a liquid inlet pipe is arranged at the top end of the buckle bowl, and the liquid inlet pipe extends to the outside of the end cap, and the tubular nanofiltration core rod is arranged in the fixed cylinder, and a threaded tube 2 is fixedly installed at the bottom end of the tubular nanofiltration core rod, and the threaded tube 2 is threadedly connected to the inner wall of the fixed cylinder, and the buckle bowl is pressed on the top end of the tubular nanofiltration core rod, and a rotating sleeve is movably provided on the outer wall of the fixed cylinder, and a threaded tube 1 is fixedly installed on the top end of the rotating sleeve, and the outer wall of the threaded tube 1 is threadedly connected to the inner wall of the end cap, and the top end of the tubular nanofiltration core rod extends to the outside of the fixed cylinder.

[0007] Furthermore, the tubular nanofiltration core rod comprises a bundle tube tube, a nanofiltration tube is arranged inside the bundle tube tube, and a through hole is opened on the outer wall of the bundle tube tube.

[0008] Furthermore, a gap is left between the inner wall of the fixed cylinder and the outer wall of the tubular nanofiltration core rod, a water outlet pipe is connected to the inner wall of the side of the fixed cylinder, and a liquid discharge pipe is connected to the bottom end of the fixed cylinder.

[0009] Furthermore, a sealing ring 1 is fixedly installed on the bottom end of the threaded tube 2, and the sealing ring 1 is attached to the inner wall of the fixed tube. A sealing ring 2 is provided on the outer wall fixed sleeve of the bottom end of the tubular nanofiltration core rod, and the sealing ring 2 is attached to the inner wall of the fixed tube. The sealing ring 2 is located below the water outlet pipe. A sealing ring 3 is provided on the outer wall fixed sleeve of the tubular nanofiltration core rod, and the sealing ring 3 is attached to the inner wall of the fixed tube. The sealing ring 3 is located above the through hole.

[0010] Furthermore, a sealing ring four is provided on the fixed sleeve on the outer wall of the bottom end of the buckle bowl, and the sealing ring four is attached to the inner wall of the top end of the rotating sleeve.

[0011] Furthermore, the outer wall of the rotating sleeve is provided with anti-slip grooves, the bottom outer wall fixed sleeve of the rotating sleeve is provided with a retaining ring, the outer wall fixed sleeve of the fixed tube is provided with a limiting cover, the limiting cover covers the retaining ring, and the internal depth of the limiting cover is greater than the height of the rotating sleeve.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. A rotating sleeve that can rotate relative to the fixed cylinder is provided. On the one hand, the end of the tubular nanofiltration core rod extending out of the fixed cylinder is covered, and on the other hand, it is used to install the threaded tube 1. The threaded tube 1 is screwed into the end cover to install the rotating sleeve, thereby realizing the installation of the tubular nanofiltration core rod. When replacing the tubular nanofiltration core rod, it is only necessary to first rotate the rotating sleeve to drive the threaded tube 1 to rotate, take the threaded tube 1 out of the end cover, and then slide the rotating sleeve down to drive the threaded tube 1 to slide down to leak the tubular nanofiltration core rod. At this time, the end cover is no longer connected to the fixed cylinder and the rotating sleeve as the outer cylinder structure. At this time, the tubular nanofiltration core rod can be taken out by rotating the tubular nanofiltration core rod, and there is no need to rotate the end cover during the whole process. Therefore, a hard tube can be used for the liquid inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the overall front sectional view of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the tubular nanofiltration core rod of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the overall explosion view of the utility model.

[0018] In the figure: 1. end cover; 2. liquid inlet pipe; 3. rotating sleeve; 4. fixed cylinder; 5. water outlet pipe; 6. liquid discharge pipe; 7. buckle bowl; 8. threaded tube one; 9. tubular nanofiltration core rod; 10. threaded tube two; 11. sealing ring one; 12. sealing ring two; 13. sealing ring three; 14. retaining ring; 15. limiting cover; 16. sealing ring four; 901. bundle tube cylinder; 902. nanofiltration tube; 903. through hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] See also Figure 1-Figure 4The utility model provides a technical solution: a tubular nanofiltration membrane for wastewater treatment, comprising an end cap 1, a fixed cylinder 4, and a tubular nanofiltration core rod 9. A buckle bowl 7 is arranged inside the end cap 1, and a liquid inlet pipe 2 is arranged at the top of the buckle bowl 7. The liquid inlet pipe 2 extends out of the end cap 1, and the tubular nanofiltration core rod 9 is arranged in the fixed cylinder 4. A threaded pipe 10 is fixedly installed at the bottom end of the tubular nanofiltration core rod 9. The threaded pipe 10 is threadedly connected to the inner wall of the fixed cylinder 4. The buckle bowl 7 is pressed on the top end of the tubular nanofiltration core rod 9. A rotating sleeve 3 is movably provided on the outer wall of the fixed cylinder 4. A threaded pipe 8 is fixedly installed at the top end of the rotating sleeve 3. The outer wall of the threaded pipe 8 is threadedly connected to the inner wall of the end cap 1. The top end of the tubular nanofiltration core rod 9 extends out of the fixed cylinder 4. The fixed cylinder 4 and the rotating sleeve 3 are arranged as the outer cylinder structure. The threaded pipe 10 is arranged to fix the tubular nanofiltration core rod 9 to the fixed cylinder 4. When replacing the tubular nanofiltration core rod 9, only the rotation The tubular nanofiltration core rod 9 drives the threaded tube 2 10 to rotate, so that the tubular nanofiltration core rod 9 and the threaded tube 2 10 can be screwed out from the fixed tube 4. A rotating sleeve 3 that can rotate relative to the fixed tube 4 is provided. On the one hand, the end of the tubular nanofiltration core rod 9 extending outside the fixed tube 4 is shielded, and on the other hand, it is used to install the threaded tube 1 8. The rotating sleeve 3 is installed by screwing the threaded tube 1 8 into the end cover 1, thereby realizing the installation of the tubular nanofiltration core rod 9. When replacing the tubular nanofiltration core rod 9, it is only necessary to first rotate the rotating sleeve 3 to drive the threaded tube 1 8 to rotate, and take the threaded tube 1 8 out of the end cover 1, and then slide the rotating sleeve 3 down to drive the threaded tube 1 8 to slide down to leak the tubular nanofiltration core rod 9. At this time, the end cover 1 is no longer connected to the fixed tube 4 and the rotating sleeve 3 as the outer tube structure. At this time, the tubular nanofiltration core rod 9 can be taken out by rotating the tubular nanofiltration core rod 9, and there is no need to rotate the end cover 1 throughout the process, so the liquid inlet pipe 2 can use a hard pipe;

[0021] The tubular nanofiltration core rod 9 comprises a bundle tube 901, a nanofiltration tube 902 is arranged inside the bundle tube 901, and a through hole 903 is provided on the outer wall of the bundle tube 901;

[0022] There is a gap between the inner wall of the fixed cylinder 4 and the outer wall of the tubular nanofiltration core rod 9, so that the filtered water after being filtered by the nanofiltration tube 902 can flow into the fixed cylinder 4 from the through hole 903. The inner wall of the side of the fixed cylinder 4 is connected to a water outlet pipe 5 for discharging the filtered water filtered by the tubular nanofiltration core rod 9. The bottom end of the fixed cylinder 4 is connected to a drain pipe 6 for discharging the waste liquid that cannot be filtered.

[0023] A sealing ring 11 is fixedly installed at the bottom end of the threaded tube 10, and the sealing ring 11 is attached to the inner wall of the fixed cylinder 4 to prevent the waste liquid discharged from the tubular nanofiltration core rod 9 from flowing back to between the threaded tube 10 and the fixed cylinder 4. A sealing ring 2 12 is provided on the fixed sleeve of the outer wall of the bottom end of the tubular nanofiltration core rod 9. The sealing ring 2 12 is attached to the inner wall of the fixed cylinder 4. The sealing ring 2 12 is located below the outlet pipe 5 to prevent the filtered water filtered by the tubular nanofiltration core rod 9 from flowing to the bottom of the tubular nanofiltration core rod 9 and then flowing out of the discharge pipe 6. A sealing ring 3 13 is provided on the fixed sleeve of the outer wall of the tubular nanofiltration core rod 9. The sealing ring 3 13 is attached to the inner wall of the fixed cylinder 4. The sealing ring 3 13 is located above the through hole 903 to prevent the filtered water flowing out of the through hole 903 from flowing back to the rotating sleeve 3 and the fixed cylinder 4, and then leaking from the joint between the rotating sleeve 3 and the fixed cylinder 4;

[0024] The outer wall of the bottom end of the buckle bowl 7 is fixed with a sealing ring 4 16, and the sealing ring 4 16 is attached to the inner wall of the top of the rotating sleeve 3 to prevent the wastewater discharged from the buckle bowl 7 from flowing out from the joint between the tubular nanofiltration core rod 9 and the rotating sleeve 3;

[0025] The outer wall of the rotating sleeve 3 is provided with anti-slip grooves, the bottom outer wall fixed sleeve of the rotating sleeve 3 is provided with a retaining ring 14, the outer wall fixed sleeve of the fixed tube 4 is provided with a limiting cover 15, the limiting cover 15 covers the retaining ring 14, the internal depth of the limiting cover 15 is greater than the height of the rotating sleeve 3, and the retaining ring 14 is limited by the limiting cover 15, so that after the threaded tube 8 is screwed into the end cover 1, the upper surface of the retaining ring 14 contacts with the inner wall of the top of the limiting cover 15, preventing the fixed tube 4 from sliding downward relative to the rotating sleeve 3, thereby causing the rotating sleeve 3 and the fixed tube 4 to detach.

[0026] Working principle: When in use, waste water flows from the liquid inlet pipe 2 into the buckle bowl 7, and then flows from the buckle bowl 7 into the tubular nanofiltration core rod 9. The filtered water flows from the through hole 903 to the fixed cylinder 4, and then is discharged from the outlet pipe 5. The waste liquid that cannot be filtered flows out from the bottom end of the tubular nanofiltration core rod 9 and is discharged from the drainage pipe 6. When the tubular nanofiltration core rod 9 needs to be replaced, the rotating sleeve 3 is rotated to drive the threaded tube 8 to rotate, and the threaded tube 8 is taken out from the end cover 1. Then the rotating sleeve 3 is lowered to drive the threaded tube 8 to slide down to leak the tubular nanofiltration core rod 9. At this time, the end cover 1 is no longer connected with the fixed cylinder 4 and the rotating sleeve 3 as the outer cylinder structure. At this time, the tubular nanofiltration core rod 9 can be taken out by rotating the tubular nanofiltration core rod 9. There is no need to rotate the end cover 1 during the whole process, thereby avoiding the rotation of the liquid inlet pipe 2.

[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A tubular nanofiltration membrane for wastewater treatment, comprising an end cap (1), a fixing cylinder (4), and a tubular nanofiltration core rod (9), characterized in that: A buckle bowl (7) is arranged inside the end cover (1), and a liquid inlet pipe (2) is arranged at the top end of the buckle bowl (7), and the liquid inlet pipe (2) extends to the outside of the end cover (1). The tubular nanofiltration core rod (9) is arranged in the fixed cylinder (4), and a threaded tube 2 (10) is fixedly installed at the bottom end of the tubular nanofiltration core rod (9), and the threaded tube 2 (10) is threadedly connected to the inner wall of the fixed cylinder (4). The buckle bowl (7) is pressed on the top end of the tubular nanofiltration core rod (9), and a rotating sleeve (3) is movably sleeved on the outer wall of the fixed cylinder (4), and a threaded tube 1 (8) is fixedly installed at the top end of the rotating sleeve (3), and the outer wall of the threaded tube 1 (8) is threadedly connected to the inner wall of the end cover (1), and the top end of the tubular nanofiltration core rod (9) extends to the outside of the fixed cylinder (4).

2. A tubular nanofiltration membrane for wastewater treatment according to claim 1, characterized in that: The tubular nanofiltration core rod (9) comprises a bundled tube tube (901), a nanofiltration tube (902) is arranged inside the bundled tube tube (901), and a through hole (903) is provided on the outer wall of the bundled tube tube (901).

3. A tubular nanofiltration membrane for wastewater treatment according to claim 1, characterized in that: A gap is left between the inner wall of the fixed cylinder (4) and the outer wall of the tubular nanofiltration core rod (9); a water outlet pipe (5) is provided in communication with the inner wall of the side of the fixed cylinder (4); and a liquid discharge pipe (6) is provided in communication with the bottom end of the fixed cylinder (4).

4. A tubular nanofiltration membrane for wastewater treatment according to claim 1, characterized in that: The bottom end of the threaded tube 2 (10) is fixedly mounted with a sealing ring 1 (11), which is attached to the inner wall of the fixed cylinder (4). The bottom outer wall fixed sleeve of the tubular nanofiltration core rod (9) is provided with a sealing ring 2 (12), which is attached to the inner wall of the fixed cylinder (4). The sealing ring 2 (12) is located below the water outlet pipe (5). The outer wall fixed sleeve of the tubular nanofiltration core rod (9) is provided with a sealing ring 3 (13), which is attached to the inner wall of the fixed cylinder (4). The sealing ring 3 (13) is located above the through hole (903).

5. The tubular nanofiltration membrane for wastewater treatment according to claim 1, characterized in that: The outer wall fixed sleeve at the bottom end of the buckle bowl (7) is provided with a sealing ring four (16), and the sealing ring four (16) is attached to the inner wall of the top end of the rotating sleeve (3).

6. A tubular nanofiltration membrane for wastewater treatment according to claim 1, characterized in that: The outer wall of the rotating sleeve (3) is provided with anti-slip grooves, the outer wall fixed sleeve at the bottom end of the rotating sleeve (3) is provided with a retaining ring (14), the outer wall fixed sleeve of the fixed cylinder (4) is provided with a limiting cover (15), the limiting cover (15) covers the retaining ring (14), and the inner depth of the limiting cover (15) is greater than the height of the rotating sleeve (3).

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