Nanofiltration device for plastic impurity separation

Abstract

The utility model relates to the technical field of nanofiltration devices, and discloses a nanofiltration device for separating plastic impurities, which comprises a filter cartridge and a cover plate, the cover plate is fixedly mounted in the middle of the surface of the filter cartridge, a cylinder extending into the filter cartridge is fixed below the cover plate, the bottom of the cylinder is connected with a filter screen cartridge communicated with the cylinder, and the bottom of the filter screen cartridge is of a sealing structure. Meshes are uniformly formed in the outer surface of the filter screen cylinder, convex and concave structures are uniformly arranged on the surface of the filter screen cylinder, and a water outlet pipe communicated with the interior of the cylinder is connected to the surface of the cover plate. According to the technical scheme of the utility model, the filter screen cylinder with uniformly distributed convex and concave structures on the surface is arranged below the cylinder, so that a nanofiltration membrane with a larger area can be clung to the outer surface of the filter screen cylinder to obtain a larger nanofiltration area under the action of water pressure during filtration, and the filter effect is better; the washing structures from top to bottom and from bottom to top are arranged, so that the surface of the nanofiltration membrane can be washed, and the service life of the nanofiltration membrane is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of nanofiltration devices, in particular to a nanofiltration device for separating plastic impurities. Background Art

[0002] In recent years, microplastic pollution has become a global environmental problem. From the depths of the ocean to the top of the mountain, microplastics are everywhere. They not only affect the ecosystem, but also quietly sneak into our drinking water. Microplastics refer to plastic particles and textile fibers with a diameter of less than 5 mm. They come from the decomposition of plastic waste, and may also come from cosmetics and cleaning products. Microplastic particles are tiny and not easily excreted by the human body. Long-term accumulation may affect health. Not only do they have potential hazards themselves, they may also carry toxic chemicals, posing a threat to human health.

[0003] The water purifier can effectively remove impurities, heavy metals, bacteria and other harmful substances in the water through a multi-stage filtration system. The nanofiltration membrane can effectively filter plastic microparticles in the water. In order to ensure efficient filtration effect and the service life of the nanofiltration membrane, we propose a nanofiltration device for separating plastic impurities. Utility Model Content

[0004] The purpose of the utility model is to provide a nanofiltration device for separating plastic impurities. A filter cylinder with evenly distributed protrusions and recessed structures on the surface is placed below a cylinder. During subsequent filtration, under the action of water pressure, a nanofiltration membrane with a larger area can be pressed against the outer surface of the filter cylinder to obtain a larger nanofiltration area and a better filtration effect. A flushing structure from top to bottom and from bottom to top is provided to flush the surface of the nanofiltration membrane and increase the service life of the nanofiltration membrane, thereby solving the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nanofiltration device for separating plastic impurities, comprising a filter cartridge and a cover plate, the cover plate being installed and fixed at the middle position of the surface of the filter cartridge, a cylinder extending into the filter cartridge being fixed below the cover plate, a filter screen cartridge connected thereto being connected to the bottom of the cylinder, the bottom of the filter screen cartridge being a sealing structure, mesh holes being evenly arranged on the outer surface of the filter screen cartridge, protrusions and recessed structures being evenly arranged on the surface of the filter screen cartridge, and a water outlet pipe connected to the inside of the cylinder being connected to the surface of the cover plate; an annular upper water trough being fixed to the outer ring surface of the filter cartridge, the upper water trough being connected to the inside of the filter cartridge through upper through ports evenly distributed on the outer ring surface above the filter cartridge, and an upper water inlet pipe and an upper impurity discharge pipe connected thereto being connected to the two sides of the upper water trough being connected thereto respectively; an annular lower water trough being fixed to the lower surface of the outer ring of the filter cartridge, the lower water trough being connected to the inside of the filter cartridge through lower through ports evenly distributed on the outer ring surface below the filter cartridge, and a lower water inlet pipe and a lower impurity discharge pipe connected thereto being connected to the two sides of the lower water trough being connected thereto respectively.

[0006] By adopting the above technical solution, the water containing microplastic particles enters the inside of the filter cartridge and is filtered and purified by the nanofiltration membrane sleeved and fixed on the outer ring of the filter mesh cylinder. The filtration work can be stopped regularly to allow the water to enter from above and flow downward, or enter from below and flow upward, so as to wash and clean the outer surface of the nanofiltration membrane and ensure its service life.

[0007] Optionally, a ring groove is circumferentially formed on the outer ring of the cylinder, and multiple rings of ring grooves are provided.

[0008] By adopting the above technical solution, after the nanofiltration membrane is sleeved on the outer ring of the cylinder, structures such as rubber bands for fixing the nanofiltration membrane can be wound around the outer ring of the ring groove to fix the nanofiltration membrane.

[0009] Optionally, the cover plate is fixedly installed on the upper surface of the filter cartridge through bolts, and multiple bolts are provided.

[0010] Optionally, an opening communicating with the inside of the filter cartridge is formed on the surface of the filter cartridge below the cover plate, and the cylinder and the filter mesh cylinder enter the filter cartridge through the opening.

[0011] Optionally, electromagnetic valves are installed on the upper water inlet pipe, the lower water inlet pipe, the upper waste discharge pipe, the lower waste discharge pipe and the water outlet pipe.

[0012] By adopting the above technical solution, the opening and closing of each pipeline are controlled by the electromagnetic valve.

[0013] Optionally, flanges are provided at the ends of the upper water inlet pipe, the lower water inlet pipe, the upper waste discharge pipe, the lower waste discharge pipe and the water outlet pipe.

[0014] By adopting the above technical solution, the connection of each pipeline with other pipelines is realized through the flange.

[0015] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:

[0016] 1. In the technical solution of the present application, by arranging the filter mesh cylinder with uniformly distributed convex and concave structures on the surface below the cylinder, the nanofiltration membrane can be sleeved on the outer ring of the filter mesh cylinder. During subsequent filtration, under the action of water pressure, a larger area of the nanofiltration membrane can be tightly attached to the outer surface of the filter mesh cylinder to obtain a larger nanofiltration area, with better filtration effect. Moreover, there are flushing structures from top to bottom and from bottom to top, which can flush the surface of the nanofiltration membrane and improve the service life of the nanofiltration membrane.

[0017] 2. In the technical solution of the present application, by arranging water inlet structures and wastewater discharge structures both above and below the filter cartridge, when flushing the nanofiltration membrane, water can enter from above or below to ensure the flushing effect on the nanofiltration membrane in different directions. Description of the Drawings

[0018] Other features, objectives, and advantages of the present utility model will become more apparent by reading the following detailed description of non - restrictive embodiments with reference to the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the nanofiltration device for separating plastic impurities of the present utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the nanofiltration device for separating plastic impurities of the present utility model;

[0021] Figure 3 It is a schematic diagram of the cross - sectional structure of the filter mesh cylinder of the nanofiltration device for separating plastic impurities of the present utility model.

[0022] In the figure: 1. Filter cylinder; 11. Opening; 2. Cover plate; 21. Bolt; 22. Cylindrical barrel; 221. Ring groove; 222. Filter mesh cylinder; 23. Water outlet pipe; 3. Upper water tank; 31. Upper water inlet pipe; 32. Upper waste discharge pipe; 33. Upper through - hole; 4. Lower water tank; 41. Lower water inlet pipe; 42. Lower waste discharge pipe; 43. Lower through - hole; 5. Solenoid valve. Detailed implementation manners

[0023] Please refer to Figures 1-3 , the present utility model provides a technical solution: A nanofiltration device for separating plastic impurities includes a filter cylinder 1 and a cover plate 2. An annular upper water tank 3 is fixedly arranged on the outer surface of the outer circle of the filter cylinder 1. The upper water tank 3 is communicated with the inside of the filter cylinder 1 through upper through - holes 33 evenly distributed on the outer surface of the outer circle above the filter cylinder 1. The two sides of the upper water tank 3 are respectively connected with an upper water inlet pipe 31 and an upper waste discharge pipe 32 communicated with it. The water to be nanofiltrated or the water used to wash the nanofiltration membrane can enter the upper water tank 3 from the upper water inlet pipe 31, and then enter the inside of the filter cylinder 1 through the upper through - holes 33. The waste water for washing the nanofiltration membrane can be discharged to the outside from the upper waste discharge pipe 32.

[0024] An annular lower water tank 4 is fixedly arranged on the outer surface of the lower part of the outer circle of the filter cylinder 1. The lower water tank 4 is communicated with the inside of the filter cylinder 1 through lower through - holes 43 evenly distributed on the outer surface of the outer circle below the filter cylinder 1. The two sides of the lower water tank 4 are respectively connected with a lower water inlet pipe 41 and a lower waste discharge pipe 42 communicated with it. The water to be nanofiltrated or the water used to wash the nanofiltration membrane can also enter the lower water tank 4 from the lower water inlet pipe 41 below, and then enter the inside of the filter cylinder 1 through the lower through - holes 43. The waste water for washing the nanofiltration membrane can be discharged to the outside from the lower waste discharge pipe 42.

[0025] An opening 11 is provided at the middle position on the surface of the filter cartridge 1. The opening 11 is communicated with the inside of the filter cartridge 1. The cover plate 2 is installed and fixed on the upper surface of the filter cartridge 1 through bolts 21. A plurality of bolts 21 are provided and installed and fixed at the middle position on the surface of the filter cartridge 1 to block the opening 11. A cylinder 22 extending into the filter cartridge 1 is fixed below the cover plate 2. The bottom of the cylinder 22 is connected with a filter screen cylinder 222 communicated with it. The bottom of the filter screen cylinder 222 is a sealed structure. The outer surface of the filter screen cylinder 222 is also evenly provided with mesh holes. A ring groove 221 is circumferentially formed on the outer ring of the cylinder 22. A plurality of rings of the ring groove 221 are provided. The nanofiltration membrane with an opening 11 above can be sleeved on the outer ring of the filter screen cylinder 222. The upper part of the nanofiltration membrane is sleeved on the outer ring of the cylinder 22. Then, a fastener such as a rubber band is used to sleeve the upper outer ring of the nanofiltration membrane and is clamped in the ring groove 221 to realize the locking of the nanofiltration membrane. A water outlet pipe 23 communicated with the inside of the cylinder 22 is connected to the surface of the cover plate 2.

[0026] Flanges are provided at the ends of the upper water inlet pipe 31, the lower water inlet pipe 41, the upper waste discharge pipe 32, the lower waste discharge pipe 42 and the water outlet pipe 23. The upper water inlet pipe 31 and the lower water inlet pipe 41 are connected to a water supply pipe by using the flanges. The upper waste discharge pipe 32 and the lower waste discharge pipe 42 are connected to a waste water pipe. The water outlet pipe 23 is connected to a water use pipe. Solenoid valves 5 are installed on the upper water inlet pipe 31, the lower water inlet pipe 41, the upper waste discharge pipe 32, the lower waste discharge pipe 42 and the water outlet pipe 23. The opening and closing states of each pipeline can be controlled through the solenoid valves 5. The solenoid valves 5 of the upper waste discharge pipe 32 and the lower waste discharge pipe 42 are closed and the solenoid valve 5 of the water outlet pipe 23 is opened. When the solenoid valve 5 on the upper water inlet pipe 31 or the lower water inlet pipe 41 is opened, after water enters the inside of the filter cartridge 1, it can be filtered through the nanofiltration membrane under the action of water pressure. Finally, the purified water can be discharged from the upper water outlet pipe 23. During flushing, the solenoid valve 5 of the water outlet pipe 23 can be closed, and the solenoid valves 5 of the upper water inlet pipe 31 and the lower waste discharge pipe 42 or the solenoid valves 5 of the lower water inlet pipe 41 and the upper waste discharge pipe 32 can be separately opened to flush the surface of the nanofiltration membrane from top to bottom or from bottom to top. Finally, the waste water carrying impurities is discharged from the lower waste discharge pipe 42 or the upper waste discharge pipe 32.

[0027] In order to increase the contact area and improve the nanofiltration effect, convex and concave structures are evenly arranged on the surface of the filter screen cylinder 222. Under the action of water pressure, the nanofiltration membrane can be tightly attached to the outer surface of the filter screen cylinder 222 to obtain a larger contact area and a better nanofiltration effect.

[0028] When in use, first unscrew the bolt 21 to remove the cover plate 2 and take out the cylinder 22 and the filter screen cylinder 222 below it. Then, put the nanofiltration membrane with an opening 11 on the outer ring of the cylinder 22. Then, use a rubber band or the like to wrap around the upper outer ring of the nanofiltration membrane and then clamp it in the annular groove 221 to lock the nanofiltration membrane. Then, insert the filter screen cylinder 222 and the cylinder 22 into the filter cylinder 1 through the opening 11. Use the bolt 21 again to lock and fix the cover plate 2 and seal the opening 11. Connect the upper water inlet pipe 31 and the lower water inlet pipe 41 to the water supply pipe, connect the upper waste pipe 32 and the lower waste pipe 42 to the waste water discharge pipe, and connect the outlet pipe to the water use pipe. When in normal use, only open the solenoid valves 5 of the upper water inlet pipe 31 and the outlet pipe 23. The water enters the upper water tank 3 through the upper water inlet pipe 31, and then enters the filter cylinder 1 through the upper through hole 33 above. Under the action of water pressure, the nanofiltration membrane will be first pressed against the outer surface of the filter screen cylinder 222 with an uneven surface. Then, the impurities and plastic micro-particles will be filtered and flow in the filter cylinder 1, while the purified water passes through the nanofiltration membrane and is discharged from the outlet pipe 23. When it is necessary to clean the nanofiltration membrane to ensure its service life after using for a period of time, the solenoid valve 5 on the outlet pipe 23 can be closed and the solenoid valve 5 of the lower waste pipe 42 can be opened. The water can wash the outer surface of the nanofiltration membrane after entering through the upper through hole 33. Finally, the waste water carrying impurities enters the lower water tank 4 through the lower through hole 43 and is discharged from the lower waste pipe 42. In order to achieve flushing of different angles of the surface of the nanofiltration membrane, only the solenoid valves 5 of the lower water inlet pipe 41 and the upper waste pipe 32 can be opened. The water enters the lower water tank 4 through the lower water inlet pipe 41 below, then enters through the lower through hole 43 and flows upward, flushing the outer surface of the nanofiltration membrane from bottom to top, and the water with impurities enters the upper water tank 3 through the upper through hole 33 above and is discharged from the upper waste pipe 32. When the service life of the nanofiltration membrane reaches, all solenoid valves 5 can be closed, and the cover plate 2 can be removed again to take out the cylinder 22 and the filter screen cylinder 222 to replace the nanofiltration membrane.

Claims

1. A nanofiltration device for separating plastic impurities, comprising a filter cartridge (1) and a cover plate (2), characterized in that: The cover plate (2) is installed and fixed at the middle position of the surface of the filter cartridge (1); a cylinder (22) extending into the filter cartridge (1) is fixed below the cover plate (2); a filter cylinder (222) communicating with the cylinder (22) is connected to the bottom of the cylinder (22); the bottom of the filter cylinder (222) is a sealing structure; mesh holes are evenly arranged on the outer surface of the filter cylinder (222); protrusions and recessed structures are evenly arranged on the surface of the filter cylinder (222); and a water outlet pipe (23) communicating with the inside of the cylinder (22) is connected to the surface of the cover plate (2); An annular upper water trough (3) is fixed on the outer ring surface of the filter cartridge (1), and the upper water trough (3) is connected to the interior of the filter cartridge (1) through upper openings (33) evenly distributed on the upper outer ring surface of the filter cartridge (1), and the upper water inlet pipe (31) and the upper impurity discharge pipe (32) are respectively connected to the two sides of the upper water trough (3). An annular lower water trough (4) is fixed on the lower surface of the outer ring of the filter cartridge (1); the lower water trough (4) is connected to the interior of the filter cartridge (1) through lower openings (43) evenly distributed on the lower surface of the outer ring of the filter cartridge (1); and both sides of the lower water trough (4) are respectively connected to a lower water inlet pipe (41) and a lower waste discharge pipe (42) connected thereto.

2. A nanofiltration device for separating plastic impurities according to claim 1, characterized in that: The outer ring of the cylinder (22) is surrounded by an annular groove (221), and the annular groove (221) is provided with multiple circles.

3. A nanofiltration device for separating plastic impurities according to claim 1, characterized in that: The cover plate (2) is mounted and fixed on the upper surface of the filter cartridge (1) via bolts (21), and a plurality of bolts (21) are provided.

4. A nanofiltration device for separating plastic impurities according to claim 1, characterized in that: An opening (11) communicating with the interior of the filter cartridge (1) is provided on the surface of the filter cartridge (1) below the cover plate (2), and the cylinder (22) and the filter screen cartridge (222) enter the filter cartridge (1) through the opening (11).

5. A nanofiltration device for separating plastic impurities according to claim 1, characterized in that: Solenoid valves (5) are installed on the upper water inlet pipe (31), the lower water inlet pipe (41), the upper waste pipe (32), the lower waste pipe (42) and the water outlet pipe (23).

6. A nanofiltration device for separating plastic impurities according to claim 1, characterized in that: The ends of the upper water inlet pipe (31), the lower water inlet pipe (41), the upper waste pipe (32), the lower waste pipe (42) and the water outlet pipe (23) are all provided with flanges.

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