A pressure driving system applied to a membrane separation device

Abstract

The utility model relates to the field of membrane separation technology, and disclose a pressure drive system for membrane separation device, solved the problem of uneven pressure distribution of the existing membrane separation device, it includes total controller, first membrane separation component, second membrane separation component and third membrane separation component, first membrane separation component, second membrane separation component and third membrane separation component series connection are arranged, and first membrane separation component, second membrane separation component and third membrane separation component all are by booster pump one, liquid suction pipe, liquid supply pipe, several liquid supply branch pipes, several filter membranes, several water production branch pipes and water production pipe constitute, through this drive system, can improve the membrane separation efficiency through series connection and parallel connection combined mode, can avoid causing energy waste through the mode of dispersing pressure, also will not cause the situation of insufficient pressure.

Description

Technical Field

[0001] This utility model belongs to the field of membrane separation technology, specifically a pressure drive system applied to a membrane separation device. Background Technology

[0002] Membrane separation technology is a technique that utilizes the selective permeability of semi-permeable membranes to achieve the separation, concentration, and purification of substances through physical or chemical processes. Its basic principle is to apply a pressure or concentration difference across the membrane, causing solutes, solvents, or gas molecules in a solution to separate due to the membrane's selective permeability. As a highly efficient separation method, membrane separation technology has been widely used in water treatment, pharmaceuticals, food, and chemical industries.

[0003] Because the permeability of a single membrane is limited, in order to meet the demand for a large permeate flow rate, many membranes need to be connected in series. In this way, the osmotic pressure of the solution on the membrane surface gradually increases. However, since traditional membrane separation devices use a centralized pressurization mode for the feed water, the pressure of the feed water must be higher than the osmotic pressure of the last membrane and the pressure drop of the feed water flowing through all membrane groups. Thus, the actual feed water pressure is significantly higher than the osmotic pressure required for the permeate of the first few membranes in the membrane group, resulting in inefficient use of energy. At the same time, when there are many membranes connected in series, the pressure may be insufficient even with a single booster pump. Therefore, this application proposes a pressure drive system for membrane separation devices. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a pressure drive system for membrane separation devices, which effectively solves the problem of uneven pressure distribution in existing membrane separation devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pressure drive system for a membrane separation device, comprising a main controller, a first membrane separation component, a second membrane separation component, and a third membrane separation component, wherein the first membrane separation component, the second membrane separation component, and the third membrane separation component are connected in series;

[0006] The first, second, and third membrane separation units each consist of a booster pump, a liquid extraction pipe, a liquid supply pipe, several liquid supply branch pipes, several filter membranes, several product water branch pipes, and a product water pipe. The liquid extraction pipe is connected to the inlet of the booster pump, one end of the liquid supply pipe is connected to the outlet of the booster pump, the liquid supply branch pipes are connected between the filter membranes and the liquid supply pipes, multiple filter membranes are arranged in parallel, the product water branch pipes are connected to the side of the bottom end of the filter membranes, and the product water pipes are connected to the bottom end of the product water branch pipes. The booster pump is connected to the main controller via wires, and the number of filter membranes on the first, second, and third membrane separation units increases sequentially.

[0007] Preferably, the inlet end of the first membrane separation component is provided with a raw liquid storage tank, a buffer storage tank one is provided between the first membrane separation component and the second membrane separation component, and a buffer storage tank two is provided between the second membrane separation component and the third membrane separation component. Liquid level sensors are inserted into the top of the raw liquid storage tank, the buffer storage tank one and the buffer storage tank two, and the liquid level sensors are connected to the main controller through wires.

[0008] Preferably, a flow meter is installed on the water production pipe, and the flow meter is connected to the main controller via a wire.

[0009] Preferably, the first membrane separation component, the second membrane separation component, and the third membrane separation component are each equipped with a booster pump 2, a purified water pumping pipe, and a purified water supply pipe. The purified water pumping pipe is connected to the inlet of the booster pump 2, and the purified water supply pipe is connected between the booster pump 2 and the liquid supply pipe. The liquid supply pipe is equipped with a valve 1, and the purified water supply pipe is equipped with a valve 2. A concentrated water branch pipe is fixedly installed at the middle position of the bottom end of the filter membrane, and a concentrated water discharge pipe is installed at the bottom end of the concentrated water branch pipe.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] (1) In operation, multi-stage filtration can be achieved by connecting the first membrane separation component, the second membrane separation component and the third membrane separation component in series. By setting the first membrane separation component, the second membrane separation component and the third membrane separation component, which consist of a booster pump, a liquid extraction pipe, a liquid supply pipe, several liquid supply branch pipes, several filter membranes, several product water branch pipes and product water pipes, and by setting the filter membranes in parallel, the filtration efficiency can be effectively improved. The first membrane separation component, the second membrane separation component and the third membrane separation component are each equipped with a booster pump, which can achieve independent pressure control, avoid energy waste, and also avoid insufficient pressure affecting the filtration efficiency. The number of filter membranes on the first membrane separation component, the second membrane separation component and the third membrane separation component increases sequentially, which can avoid the subsequent filtration efficiency being affected by the decrease in the pore size of the filter membrane.

[0012] (2) By setting up a raw liquid storage tank, a buffer storage tank 1 and a buffer storage tank 2, a stable liquid supply can be achieved, avoiding the situation of the booster pump sucking dry. By setting up a liquid level sensor, the filtration rate can be judged based on the liquid level change over a certain period of time. By setting up a flow meter, the water production rate can be monitored, thereby enabling effective control of the booster pump power.

[0013] (3) By setting up a booster pump, a clean water pumping pipe and a clean water supply pipe, the filter membrane can be rinsed regularly to remove impurities from the filter membrane. By setting up a concentrated water branch pipe and a concentrated water discharge pipe, the filtered concentrated water and the impurities rinsed out can be discharged. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the pressure drive system structure of the present invention applied to a membrane separation device;

[0017] Figure 2 This is a schematic diagram of the structure of the second membrane separation component of this utility model;

[0018] In the diagram: 1. Main controller; 2. First membrane separation unit; 3. Second membrane separation unit; 4. Third membrane separation unit; 5. Booster pump one; 6. Liquid extraction pipe; 7. Liquid supply pipe; 8. Liquid supply branch pipe; 9. Filter membrane; 10. Product water branch pipe; 11. Product water pipe; 12. Raw material storage tank; 13. Buffer storage tank one; 14. Buffer storage tank two; 15. Liquid level sensor; 16. Flow meter; 17. Booster pump two; 18. Clean water extraction pipe; 19. Clean water supply pipe; 20. Valve one; 21. Valve two; 22. Concentrate branch pipe; 23. Concentrate discharge pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Depend on Figure 1 and Figure 2This invention discloses a pressure drive system for a membrane separation device, comprising a main controller 1, a first membrane separation component 2, a second membrane separation component 3, and a third membrane separation component 4. The first membrane separation component 2, the second membrane separation component 3, and the third membrane separation component 4 are connected in series. Each of the three components consists of a booster pump 5, a suction pipe 6, a supply pipe 7, several supply branch pipes 8, several filter membranes 9, several product water branch pipes 10, and a product water pipe 11. The suction pipe 6 is connected to the inlet of the booster pump 5, one end of the supply pipe 7 is connected to the outlet of the booster pump 5, the supply branch pipes 8 connect the filter membranes 9 and the supply pipes 7, multiple filter membranes 9 are connected in parallel, and the product water branch pipes 10 are connected to the side of the bottom end of the filter membranes 9. The product water pipe 11 is connected to the bottom end of the product water branch pipe 10. The booster pump 5 is connected to the main controller 1 through a wire. The number of filter membranes 9 on the first membrane separation component 2, the second membrane separation component 3 and the third membrane separation component 4 increases sequentially. The inlet end of the first membrane separation component 2 is provided with a raw liquid storage tank 12. A buffer storage tank 13 is provided between the first membrane separation component 2 and the second membrane separation component 3. A buffer storage tank 2 is provided between the second membrane separation component 3 and the third membrane separation component 4. A liquid level sensor 15 is inserted at the top of the raw liquid storage tank 12, the buffer storage tank 13 and the buffer storage tank 2 14. The liquid level sensor 15 is connected to the main controller 1 through a wire. A flow meter 16 is provided on the product water pipe 11. The flow meter 16 is connected to the main controller 1 through a wire.

[0021] The first membrane separation component 2, the second membrane separation component 3, and the third membrane separation component 4 are connected in series to achieve multi-stage membrane filtration. Each of the first membrane separation component 2, the second membrane separation component 3, and the third membrane separation component 4 contains multiple filter membranes 9, thereby improving filtration efficiency. Since the pore size of the filter membranes in the first membrane separation component 2, the second membrane separation component 3, and the third membrane separation component 4 gradually decreases, the filtration rate gradually decreases. By setting the number of filter membranes 9 on the first membrane separation component 2, the second membrane separation component 3, and the third membrane separation component 4 to increase sequentially, the filtration rate can be improved. The raw liquid storage tank 12, the buffer storage tank 13, and the buffer storage tank 14 can realize the temporary storage function, realize the stable liquid supply to the booster pump 5, and avoid the booster pump 5 from being dry. The liquid level sensor 15 can monitor the change of liquid level within a certain period of time, thereby indirectly judging the change of filtration rate and then judging the membrane blockage. The flow meter 16 can monitor the water production rate, further judge the membrane blockage, and then control the power of the booster pump 5.

[0022] Each of the first membrane separation unit 2, the second membrane separation unit 3, and the third membrane separation unit 4 is equipped with a booster pump 2 17, a purified water pumping pipe 18, and a purified water supply pipe 19. The purified water pumping pipe 18 is connected to the inlet of the booster pump 2 17, and the purified water supply pipe 19 is connected between the booster pump 2 17 and the liquid supply pipe 7. The liquid supply pipe 7 is equipped with a valve 1 20, and the purified water supply pipe 19 is equipped with a valve 2 21. A concentrated water branch pipe 22 is fixedly installed at the middle position of the bottom end of the filter membrane 9, and a concentrated water discharge pipe 23 is installed at the bottom end of the concentrated water branch pipe 22.

[0023] When the filter membrane 9 becomes clogged, pure water is introduced into the filter membrane 9 through the booster pump 17, the purified water pumping pipe 18, and the purified water supply pipe 19 to achieve the flushing work. During flushing, valve 1 20 is closed and valve 2 21 is opened. The concentrated water branch pipe 22 and the concentrated water discharge pipe 23 can discharge the concentrated water generated during filtration, and at the same time, impurities and water can be discharged during flushing.

[0024] In operation, multi-stage filtration can be achieved by connecting the first, second, and third membrane separation components in series. The first, second, and third membrane separation components, consisting of a booster pump, a liquid extraction pipe, a liquid supply pipe, several liquid supply branch pipes, several filter membranes, several product water branch pipes, and a product water pipe, along with parallel connection of the filter membranes, effectively improve filtration efficiency. Each of the first, second, and third membrane separation components is equipped with its own booster pump, enabling independent pressure control and preventing energy waste and insufficient pressure that could affect filtration efficiency. The number of filter membranes on the assembly increases sequentially, which avoids affecting subsequent filtration efficiency due to the smaller pore size of the filter membranes. By setting up a raw liquid storage tank, a buffer storage tank one, and a buffer storage tank two, a stable liquid supply can be achieved, avoiding the situation of the booster pump sucking dry. By setting up a liquid level sensor, the filtration rate can be determined based on the liquid level change over a certain period of time. By setting up a flow meter, the water production rate can be monitored, thereby enabling effective control of the booster pump power. By setting up a booster pump two, a purified water pumping pipe, and a purified water supply pipe, the filter membranes can be flushed periodically to remove impurities from the filter membranes. By setting up a concentrate branch pipe and a concentrate discharge pipe, the filtered concentrate and the flushed impurities can be discharged.

Claims

1. A pressure drive system for a membrane separation device, comprising a main controller (1), a first membrane separation assembly (2), a second membrane separation assembly (3), and a third membrane separation assembly (4), characterized in that: The first membrane separation component (2), the second membrane separation component (3), and the third membrane separation component (4) are connected in series; The first membrane separation assembly (2), the second membrane separation assembly (3), and the third membrane separation assembly (4) are all composed of a booster pump (5), a liquid extraction pipe (6), a liquid supply pipe (7), several liquid supply branch pipes (8), several filter membranes (9), several product water branch pipes (10), and a product water pipe (11). The liquid extraction pipe (6) is connected to the liquid inlet of the booster pump (5), one end of the liquid supply pipe (7) is connected to the liquid outlet of the booster pump (5), the liquid supply branch pipe (8) is connected between the filter membrane (9) and the liquid supply pipe (7), multiple filter membranes (9) are arranged in parallel, the product water branch pipe (10) is connected to the side of the bottom end of the filter membrane (9), and the product water pipe (11) is connected to the bottom end of the product water branch pipe (10). The booster pump (5) is connected to the main controller (1) through a wire. The number of filter membranes (9) on the first membrane separation assembly (2), the second membrane separation assembly (3), and the third membrane separation assembly (4) increases sequentially.

2. The pressure drive system for a membrane separation device according to claim 1, characterized in that: The first membrane separation component (2) is provided with a raw liquid storage tank (12) at the liquid inlet end, a buffer storage tank (13) is provided between the first membrane separation component (2) and the second membrane separation component (3), and a buffer storage tank (14) is provided between the second membrane separation component (3) and the third membrane separation component (4).

3. The pressure drive system for a membrane separation device according to claim 2, characterized in that: Liquid level sensors (15) are inserted into the top of each of the original liquid storage tank (12), buffer storage tank one (13) and buffer storage tank two (14), and the liquid level sensors (15) are connected to the main controller (1) through wires.

4. The pressure drive system for a membrane separation device according to claim 1, characterized in that: A flow meter (16) is installed on the water production pipe (11), and the flow meter (16) is connected to the main controller (1) through a wire.

5. A pressure drive system for a membrane separation device according to claim 1, characterized in that: The first membrane separation assembly (2), the second membrane separation assembly (3) and the third membrane separation assembly (4) are each equipped with a booster pump (17), a clean water pumping pipe (18) and a clean water supply pipe (19). The clean water pumping pipe (18) is connected to the inlet of the booster pump (17), and the clean water supply pipe (19) is connected between the booster pump (17) and the liquid supply pipe (7).

6. A pressure drive system for a membrane separation device according to claim 5, characterized in that: The liquid supply pipe (7) is equipped with valve one (20), and the clean water supply pipe (19) is equipped with valve two (21).

7. A pressure drive system for a membrane separation device according to claim 1, characterized in that: A concentrated water branch pipe (22) is fixedly installed at the middle position of the bottom end of the filter membrane (9), and a concentrated water discharge pipe (23) is installed at the bottom end of the concentrated water branch pipe (22).

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