Nanofiltration membrane structure with zero discharge of wastewater

Abstract

The utility model relates to the technical field of wastewater purification, and discloses a wastewater zero discharge nanofiltration membrane structure which comprises a workbench, a filter is arranged at the top of the workbench, the filter comprises a pressurizing part, the pressurizing part comprises a pressurizing cylinder, a pipeline I and a pipeline II are arranged on the outer wall of the pressurizing cylinder, the pressurizing part further comprises an electric cylinder above the filter, and an output rod of the electric cylinder faces the pressurizing cylinder. A pressing circular plate is arranged at the bottom of the output rod, a rubber plug is connected to the bottom of the pressing circular plate, wastewater can be filled into the pressurizing cylinder through the first pipeline, the concentrated solution can be discharged through the second pipeline, a collecting part is arranged on one side of the filter and comprises a concentrated solution collecting barrel, and a water inlet port is formed in the top of the concentrated solution collecting barrel. The waste water is filtered through the filter, so that clean water can be filtered out, the output rod pressurizes the waste water in the pressurizing cylinder, the filtering efficiency is improved, and the pipeline II is convenient for discharging the pressurized unpurified concentrated solution into the concentrated solution collecting barrel from the hose.

Description

Technical Field

[0001] This utility model relates to the field of wastewater purification technology, and in particular to a nanofiltration membrane structure for zero wastewater discharge. Background Technology

[0002] Zero wastewater discharge is an advanced environmental protection concept and technological practice. It aims to achieve the complete recycling of wastewater in the industrial production process, with factories not discharging any wastewater into the external environment. The significance of industrial wastewater purification is profound. It is not only related to environmental protection, but also involves resource conservation, economic efficiency improvement, and public health. Direct discharge of untreated industrial wastewater will seriously pollute surface water and groundwater, destroy the natural purification capacity of water bodies, and affect the balance of aquatic ecosystems.

[0003] Existing wastewater zero-discharge nanofiltration membrane structures typically rely solely on water pressure to force wastewater through the membrane. However, the water pressure is usually low, resulting in low wastewater purification efficiency. This makes them unsuitable for treating large volumes of wastewater in factories, disrupting normal production processes. Furthermore, the concentrated wastewater after purification is highly polluting and requires centralized chemical degradation, which is not easily collected using existing structures. Utility Model Content

[0004] In order to overcome the problems of low wastewater purification efficiency in existing technologies, which affect the normal production and operation of factories, and the inconvenience of collecting the concentrated liquid after wastewater compression and purification.

[0005] The technical solution of this utility model is as follows: a wastewater zero-discharge nanofiltration membrane structure, including a workbench, a filter vertically mounted on the top of the workbench, a pressurizing part including a pressurizing cylinder, a pipe 1 and a pipe 2 on the outer wall of the pressurizing cylinder, an electric cylinder located above the filter, an output rod of the electric cylinder facing the pressurizing cylinder, a pressing disc at the bottom of the output rod, a rubber stopper connected to the bottom of the pressing disc, the outer diameter of the rubber stopper being interference-fitted with the inner diameter of the pressurizing cylinder, a pipe 1 for filling the pressurizing cylinder with wastewater, a pipe 2 for discharging concentrated liquid, a collection part on one side of the filter including a concentrated liquid collection tank, a water inlet at the top of the concentrated liquid collection tank, and a hose connecting the water inlet to the pipe 2.

[0006] Preferably, the bottom of the pressure cylinder is provided with a connecting column, and the bottom of the connecting column is provided with a permeable filter core column. The liquid in the pressure cylinder can enter the interior of the permeable filter core column. The surface of the permeable filter core column is provided with a permeable hole one. The outer diameter of the permeable filter core column is wrapped with a screen one, a nanofiltration membrane one, a diaphragm screen, a nanofiltration membrane two, and a screen two in sequence.

[0007] Preferably, a sleeve is fitted around the outer diameter of the second screen, and the outer wall of the sleeve has a through hole. The sleeve can press the internal filter core, the first screen, the first nanofiltration membrane, the diaphragm mesh, the second nanofiltration membrane, and the second screen together. An outer shell is fitted around the outer diameter of the sleeve. The outer shell is a cylindrical structure. An end cap is engaged at the hole at the bottom of the outer shell. The bottom of the end cap has a filter outlet.

[0008] Preferably, a flange is provided at the outer diameter of the outer shell, the bottom of the flange is fixed to the top of the workbench, the filter outlet is located at the bottom of the workbench, a support column one is provided at the bottom of the workbench, a support column two is provided at the top of the workbench, and an upper plate is provided at the top of the support column two.

[0009] Preferably, an electric cylinder is provided at the top of the upper plate, and the output rod of the electric cylinder can extend downward through the upper plate.

[0010] Preferably, a control valve is provided on the side of pipe 2 away from the pressure cylinder, and a check valve is provided on the side of pipe 1 away from the pressure cylinder.

[0011] Preferably, the electric cylinder includes a servo motor located at the top, and the top of the concentrate collection tank is provided with an exhaust port.

[0012] The beneficial effects of this utility model are as follows: Compared with the existing purification methods that lack a pressurizing device and lack collection and management of the concentrate, the wastewater is filtered through a filter so that clean water can be filtered out. The output rod pressurizes the wastewater in the pressurizing cylinder to accelerate the filtration efficiency. Pipeline 2 allows the unpurified concentrate after pressurization to be discharged from the hose into the concentrate collection tank, which is convenient for subsequent chemical purification. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the pressure cylinder structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the concentrated liquid collection tank structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the rubber stopper structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the permeable filter core column structure of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Workbench; 11. Support column one; 12. Support column two; 13. Top plate; 2. Electric cylinder; 21. Servo motor; 22. Output rod; 221. Pressing disc; 222. Rubber stopper; 3. Filter; 31. Pipe one; 311. Check valve; 32. Pipe two; 321. Control valve; 33. Pressure cylinder; 331. Connecting column; 34. Outer shell; 341. Flange; 35. End cap; 351. Filter outlet; 4. Concentrate collection tank; 41. Water inlet port; 42. Exhaust port; 51. Permeate filter core column; 521. Screen one; 522. Screen two; 531. Nanofiltration membrane one; 532. Nanofiltration membrane two; 54. Diaphragm screen; 6. Sleeve. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please see Figure 1 - Figure 5 This utility model provides an embodiment of a zero-discharge nanofiltration membrane structure for wastewater, including a workbench 1, a filter 3 vertically mounted on the top of the workbench 1, a pressurizing section including a pressurizing cylinder 33, a pipe 31 and a pipe 32 on the outer wall of the pressurizing cylinder 33, and an electric cylinder 2 located above the filter 3. The output rod 22 of the electric cylinder 2 faces the pressurizing cylinder 33, and a pressing disc 221 is provided at the bottom of the output rod 22. A rubber stopper 222 is connected to the bottom of the pressing disc 221. The outer diameter of the rubber stopper 222 is interference-fitted with the inner diameter of the pressurizing cylinder 33. Wastewater can be filled into the pressurizing cylinder 33 by pipe 31, and concentrated liquid can be discharged through pipe 32. A collection part is provided on one side of the filter 3, which includes a concentrated liquid collection tank 4. The top of the concentrated liquid collection tank 4 is provided with a water inlet port 41. The water inlet port 41 is connected to pipe 32 through a hose. The wastewater is filtered by the filter 3 so that clean water can be filtered out. The output rod 22 pressurizes the wastewater in the pressurizing cylinder 33 to accelerate the filtration efficiency. Pipe 32 facilitates the discharge of unpurified concentrated liquid after pressurization from the hose into the concentrated liquid collection tank 4 for subsequent chemical purification.

[0021] Please see Figure 1 - Figure 4In this embodiment, the bottom of the pressure cylinder 33 is provided with a connecting column 331, and the bottom of the connecting column 331 is provided with a permeable filter core column 51. The liquid in the pressure cylinder 33 can enter the interior of the permeable filter core column 51. The surface of the permeable filter core column 51 is provided with a through hole. The outer diameter of the permeable filter core column 51 is sequentially wrapped with a screen 521, a nanofiltration membrane 531, a diaphragm 54, a nanofiltration membrane 532, and a screen 522. The cleanliness of the purification is increased by the sequential wrapping of the screen 521, nanofiltration membrane 531, diaphragm 54, nanofiltration membrane 532, and screen 522, so that the purified water can meet the standard for safe discharge. A sleeve 6 is fitted on the outer diameter of the screen 522. The outer wall of the sleeve 6 is provided with a through hole. The sleeve 6 can allow the permeable filter core column 51, screen 521, nanofiltration membrane 531, diaphragm 54, and nanofiltration membrane 522 to pass through. 32 and screen 522 are pressed together. The outer shell 34 is fitted on the outer diameter of the sleeve 6. The outer shell 34 is a round tube structure. An end cap 35 is engaged at the hole at the bottom of the outer shell 34. The bottom of the end cap 35 is provided with a filter outlet 351. The purified water can be discharged through the filter outlet 351 at the end cap 35. Several through holes 2 through the outer wall of the sleeve 6 can increase the discharge speed. A flange 341 is provided on the outer diameter of the outer shell 34. The bottom of the flange 341 is fixed to the top of the workbench 1. The filter outlet 351 is located at the bottom of the workbench 1. The bottom of the workbench 1 is provided with a support column 11. The top of the workbench 1 is provided with a support column 2 12. The top of the support column 2 12 is provided with an upper plate 13. The outer shell 34 is fixed by the annular flange 341. It is not easy to tip over under the pressure of the electric cylinder 2. The support column 2 12 can lift the electric cylinder 2 on the upper plate 13 to a certain height.

[0022] Please see Figure 2 - Figure 5In this embodiment, an electric cylinder 2 is provided at the top of the upper plate 13. The output rod 22 of the electric cylinder 2 can extend downward through the upper plate 13. The downward extension of the output rod 22 through the upper plate 13 allows the pressing disc 221 at the bottom of the output rod 22 to move the rubber plug 222 within the pressure cylinder 33. A control valve 321 is provided on the side of pipe two 32 away from the pressure cylinder 33, and a one-way valve 311 is provided on the side of pipe one 31 away from the pressure cylinder 33. The one-way valve 311 ensures that water can only enter pipe one 31 into the pressure cylinder 33, preventing the rubber plug 222 from moving downward within the pressure cylinder 33. When wastewater is discharged from pipe 31, control valve 321 can control the concentrated liquid compressed by pressurizing cylinder 33 to be discharged from the hose into concentrated liquid collection tank 4. At the same time, it can also prevent unpressurized wastewater from being discharged directly from pipe 32. Electric cylinder 2 includes servo motor 21 located at the top. The top of concentrated liquid collection tank 4 is provided with exhaust port 42. The servo motor 21 can monitor the load pressed down by output rod 22 to prevent damage to pressurizing cylinder 33 or electric cylinder 2. Exhaust port 42 facilitates maintaining the air pressure inside concentrated liquid collection tank 4 and increases the efficiency of concentrated liquid entering concentrated liquid collection tank 4.

[0023] During operation, the water pump pumps wastewater through a pipe into pipe 31. The one-way valve 311 has unidirectional flow capability, allowing wastewater to enter the pressure cylinder 33 only through pipe 31. The filling time of the pressure cylinder 33 is calculated based on the pump's efficiency. After the corresponding time, the pump stops, and the servo motor 21 drives the output rod 22 to press down the pressing plate 221 and rubber stopper 222, causing the wastewater to pass through the filter core column 51, screen 521, nanofiltration membrane 531, diaphragm screen 54, nanofiltration membrane 532, and screen 522 within the filter 3. Finally, the wastewater is discharged from the outer wall of the sleeve 6, where it is purified water. The outer shell 34 collects the purified water. The wastewater is collected and discharged from the filter outlet 351 of the end cap 35. After the wastewater is purified, the concentrate that remains in the pressurizing cylinder 33 is the concentrated liquid. At this time, the control valve 321 of the second pipeline 32 is opened, and the concentrated liquid in the pressurizing cylinder 33 flows from the hose to the concentrated liquid collection tank 4. Some concentrated liquid will still remain in the permeate filter column 51, but it will be diluted when the wastewater is filled into the pressurizing cylinder 33 for the second time. The permeate filter column 51, screen 1 521, nanofiltration membrane 1 531, diaphragm screen 54, nanofiltration membrane 2 532, screen 2 522, check valve 311, and control valve 321 are existing technologies, and their working principles will not be described in detail here.

[0024] Through the above steps, filter 3 filters the wastewater, allowing clean water to be filtered out. Output rod 22 pressurizes the wastewater in pressurizing cylinder 33, accelerating the filtration efficiency. Pipeline 2 32 facilitates the discharge of unpurified concentrate after pressurization from the hose to concentrate collection tank 4, which is convenient for subsequent chemical purification. This solves the problems of low wastewater purification efficiency in the existing technology, which affects the normal production and operation of the factory, and the inconvenience of collecting the concentrate after wastewater compression and purification.

Claims

1. A zero liquid discharge wastewater filtration membrane structure, characterized by: The utility model provides a waste water concentration device, including workbench (1), the top of workbench (1) is vertically equipped with filter (3), filter (3) includes pressurizing part, pressurizing part includes pressurizing cylinder (33), the outer wall of pressurizing cylinder (33) is equipped with pipeline one (31), pipeline two (32), pressurizing part still includes the electric cylinder (2) located above filter (3), the output rod (22) of electric cylinder (2) is towards pressurizing cylinder (33), the bottom of output rod (22) is equipped with press round plate (221), the bottom of press round plate (221) is connected with rubber plug (222), the outer diameter of rubber plug (222) is with the inner diameter of pressurizing cylinder (33) interference fit, pipeline one (31) can fill into waste water in pressurizing cylinder (33), pipeline two (32) can discharge concentrated solution, one side of filter (3) is equipped with collection part, and collection part includes concentrated solution collection barrel (4), and the top of concentrated solution collection barrel (4) is equipped with water inlet port (41), and water inlet port (41) is connected through the hose between pipeline two (32).

2. The wastewater zero-emission filtration membrane structure of claim 1, wherein: The bottom of pressurizing cylinder (33) is equipped with connecting column (331), and the bottom of connecting column (331) is equipped with bottom and is equipped with through filter core column (51), and the liquid in pressurizing cylinder (33) can enter the inside of through filter core column (51), and the surface of through filter core column (51) is equipped with through hole one, and the outer diameter of through filter core column (51) is successively wrapped with screen one (521), nanofiltration membrane one (531), diaphragm net (54), nanofiltration membrane two (532) and screen two (522).

3. The wastewater zero-emission filtration membrane structure of claim 2, wherein: The outer diameter of screen two (522) is sleeved with sleeve (6), and the outer wall of sleeve (6) is equipped with through hole two, and sleeve (6) can compress the inside through filter core column (51), screen one (521), nanofiltration membrane one (531), diaphragm net (54), nanofiltration membrane two (532) and screen two (522), and the outer diameter of sleeve (6) is sleeved with shell (34), and shell (34) is the structure of circular tube, and the hole of the bottom of shell (34) is engaged with end cover (35), and the bottom of end cover (35) is equipped with filter outlet (351).

4. The wastewater zero-emission filtration membrane structure of claim 3, wherein: The outer diameter of shell (34) is equipped with flange (341), and the bottom of flange (341) is fixed with the top of workbench (1), and filter outlet (351) is located at the bottom of workbench (1), and the bottom of workbench (1) is equipped with support one (11), and the top of workbench (1) is equipped with support two (12), and the top of support two (12) is equipped with upper plate (13).

5. The wastewater zero-emission filtration membrane structure of claim 4, wherein: The top of upper plate (13) is equipped with electric cylinder (2), and the output rod (22) of electric cylinder (2) can extend downward through upper plate (13).

6. The wastewater zero-emission filtration membrane structure of claim 5, wherein: The side, away from pressurizing cylinder (33) of pipeline two (32), is equipped with control valve (321), and the side, away from pressurizing cylinder (33) of pipeline one (31), is equipped with check valve (311).

7. The wastewater zero-emission filtration membrane structure of claim 6, wherein: Electric cylinder (2) includes servo motor (21) located at the top, and the top of concentrated solution collection barrel (4) is equipped with exhaust port (42).

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