An ultrafiltration system capable of achieving high outlet water pressure

Abstract

This invention discloses an ultrafiltration system capable of achieving high outlet pressure in the field of drinking water filtration technology. The system includes an ultrafiltration module; a raw water module connected to the inlet of the ultrafiltration module; a product water module connected to the outlet of the ultrafiltration module; a pressurization module, whose outlet is connected to the raw water module via a first air supply pipeline equipped with a first pressure regulating valve; and whose outlet is connected to the product water module via a second air supply pipeline equipped with a second pressure regulating valve; and a control module connected to the first and second pressure regulating valves for controlling the pressure difference between the inlet and outlet of the ultrafiltration module. This invention not only achieves high outlet pressure for the ultrafiltration module but also ensures stable ultrafiltration membrane flux and mechanical properties. Furthermore, it simplifies the structure of the ultrafiltration system, reduces costs, and improves efficiency, thus facilitating the widespread use of ultrafiltration membranes.

Description

Technical Field

[0001] This invention relates to the field of drinking water filtration technology, and more specifically to an ultrafiltration system capable of achieving high outlet water pressure. Background Technology

[0002] In recent years, ultrafiltration technology has matured and gradually become one of the hot technologies in the field of drinking water treatment. Ultrafiltration technology has also been widely used in water purification projects in many places, with significant advantages such as good water quality, convenient maintenance, low chemical sludge discharge, and high separation efficiency.

[0003] Ultrafiltration has a strong ability to regulate water from different sources. When water passes through the ultrafiltration membrane under gravity or transmembrane pressure provided by a pump, it can remove bacteria and viruses from the water, thereby preventing water-related diseases and deaths caused by microorganisms, thus ensuring the quality of drinking water for consumers and reducing the addition of chemical agents.

[0004] The existing ultrafiltration process flow is as follows: raw liquid - storage tank - pressurizing pump - precision filter - hollow fiber ultrafiltration equipment - storage tank - backwash water tank - backwash pump. The specific structure of the existing ultrafiltration device can be referred to an ultrafiltration microfiltration system disclosed in patent document CN213569771U. However, in actual production activities, the existing ultrafiltration system requires the setting of a backwashing structure and multiple pressurizing pumps, which not only leads to the complexity and high cost of the entire ultrafiltration system, but also results in low filtration efficiency, which seriously limits the promotion and use of ultrafiltration membranes, especially in rural water supply.

[0005] Therefore, how to simplify the structure of ultrafiltration systems and reduce costs has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an ultrafiltration system capable of achieving high outlet water pressure, so as to solve the technical problems of complex structure and high cost of existing ultrafiltration systems.

[0007] The technical solution adopted in this invention is: an ultrafiltration system capable of achieving high outlet water pressure, comprising:

[0008] Ultrafiltration module;

[0009] The raw water module has its outlet connected to the inlet of the ultrafiltration module.

[0010] A water production module, wherein the inlet of the water production module is connected to the outlet of the ultrafiltration module;

[0011] The pressurization module has its air outlet connected to the first air inlet of the raw water module via a first air supply pipeline, and the first air supply pipeline is equipped with a first pressure regulating valve for adjusting the pressure at the inlet of the ultrafiltration module; the pressurization module's air outlet is connected to the second air inlet of the product water module via a second air supply pipeline, and the second air supply pipeline is equipped with a second pressure regulating valve for adjusting the pressure at the outlet of the ultrafiltration module.

[0012] The control module is connected to the first and second pressure regulating valves and is used to control the pressure difference between the inlet and outlet of the ultrafiltration module.

[0013] Preferably, the ultrafiltration module includes a flat-sheet membrane filter, which includes an upper housing, a lower housing, and a flat-sheet ultrafiltration membrane. The flat-sheet ultrafiltration membrane is disposed between the upper housing and the lower housing, and the upper housing and the lower housing are detachably and fixedly connected.

[0014] Preferably, the raw water module includes a first stainless steel water storage tank, the top of which is provided with a first pressure gauge, a first safety valve, a first vent valve and a first air inlet, and the bottom of which is provided with a water outlet.

[0015] Preferably, the water production module includes a second stainless steel water storage tank, the top of which is provided with a second pressure gauge, a second safety valve, a second vent valve and a second air inlet, and the bottom of which is provided with a water inlet.

[0016] Preferably, the pressurization module includes a gas storage cylinder, and the top of the gas storage cylinder is provided with a gas outlet connected to a first gas supply pipeline and / or a second gas supply pipeline.

[0017] Preferably, the number of gas storage cylinders is one or two.

[0018] The beneficial effects of this invention are:

[0019] This invention employs a pressurization method at the outlet end. The pressurization module is connected to the raw water module via a first air supply pipeline, and to the product water module via a second air supply pipeline. The pressure at the inlet and outlet ends of the ultrafiltration module is controlled by a first pressure regulating valve on the first air supply pipeline and a second pressure regulating valve on the second air supply pipeline. This not only achieves high pressure at the outlet end of the ultrafiltration module but also maintains a constant pressure difference between the inlet and outlet ends. This reduces the impact of impurities in the source water on the ultrafiltration membrane's performance, thereby ensuring stable membrane flux and mechanical properties. Furthermore, it simplifies the structure of the ultrafiltration system, reduces costs, and improves efficiency, thus facilitating the widespread use of ultrafiltration membranes. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the structure of the ultrafiltration system of the present invention, which is capable of achieving high outlet water pressure;

[0021] Figure 2 This is a three-dimensional schematic diagram of an ultrafiltration module;

[0022] Figure 3 This is a schematic diagram of the structure of a flat sheet membrane filter;

[0023] Figure 4 This is a schematic diagram of the raw water module.

[0024] Figure 5 This is a schematic diagram of the water production module.

[0025] Figure 6 This is the Fourier spectrum of the PES membrane at 30 kDa after achieving high outlet water pressure.

[0026] Figure 7 This is the Fourier spectrum of the RC membrane that achieves a high outlet water pressure of 30 kDa.

[0027] Figure 8 This is the Raman spectrum of a PES membrane with a pressure of 30 kDa after achieving high outlet water pressure.

[0028] Figure 9 This is the Raman spectrum of the RC membrane that achieves a high outlet water pressure of 30 kDa.

[0029] Among them: 10. Ultrafiltration module;

[0030] 11. Upper shell; 12. Lower shell; 13. Flat sheet ultrafiltration membrane; 14. Connecting bolts; 15. Inlet pipe interface; 16. Outlet pipe interface;

[0031] 20. Raw water module;

[0032] 21. First stainless steel water storage tank; 22. First pressure gauge; 23. First safety valve; 24. First vent valve; 25. First air inlet; 26. Water outlet;

[0033] 30. Water production module;

[0034] 31. Second stainless steel water storage tank; 32. Second pressure gauge; 33. Second safety valve; 34. Second air vent valve; 35. Second air inlet; 36. Water inlet;

[0035] 40. Pressurization module;

[0036] 50. Control module;

[0037] 60. First gas supply pipeline;

[0038] 61. First pressure regulating valve;

[0039] 70. Second gas supply line;

[0040] 71. Second pressure regulating valve;

[0041] 80. First water supply pipeline;

[0042] 90. Second water supply pipeline. Detailed Implementation

[0043] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0044] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0047] Examples, such as Figures 1-6 As shown, an ultrafiltration system capable of achieving high outlet water pressure is disclosed. This ultrafiltration system reduces the impact of source water on the operating performance of the ultrafiltration membrane and ensures stable membrane flux. The ultrafiltration system includes:

[0048] Ultrafiltration module 10, which has an inlet end and an outlet end.

[0049] The raw water module 20 is provided with an outlet 26 and a first air inlet 25. The outlet 26 is connected to the first end of the first water supply pipeline 80, and the second end of the first water supply pipeline 80 is connected to the water inlet of the ultrafiltration module 10.

[0050] The water production module 30 is provided with a water inlet 36 and a second air inlet 35. The water inlet 36 of the water production module 30 is connected to the first end of the second water supply pipeline 90, and the second end of the second water supply pipeline 90 is connected to the water outlet of the ultrafiltration module 10.

[0051] The pressurization module 40 has an air outlet (not shown in the figure) that is connected to the first end of the first air supply pipeline 60 and the second end of the first air supply pipeline 60 that is connected to the first air inlet 25 of the raw water module 20. The first air supply pipeline 60 is equipped with a first pressure regulating valve 61 for adjusting the pressure at the inlet of the ultrafiltration module 10. The air outlet of the pressurization module 40 is connected to the first end of the second air supply pipeline 70 and the second end of the second air supply pipeline 70 that is connected to the second air inlet 35 of the water production module 30. The second air supply pipeline 70 is equipped with a second pressure regulating valve 71 for adjusting the pressure at the outlet of the ultrafiltration module 10.

[0052] The control module 50 is connected to the first pressure regulating valve 61 and the second pressure regulating valve 71 respectively, and the control module 50 can control the pressure difference between the inlet and outlet of the ultrafiltration module 10.

[0053] This application employs a pressurization method at the outlet end. The pressurization module 40 is connected to the raw water module 20 via the first air supply pipeline 60, and to the product water module 30 via the second air supply pipeline 70. The pressure at the inlet and outlet ends of the ultrafiltration module 10 is controlled by the first pressure regulating valve 61 on the first air supply pipeline 60 and the second pressure regulating valve 71 on the second air supply pipeline 70. This not only achieves high pressure at the outlet end of the ultrafiltration module 10, but also maintains a constant pressure difference between the inlet and outlet ends of the ultrafiltration module 10. This reduces the impact of impurities in the source water on the operating performance of the ultrafiltration membrane, thereby ensuring the stability of the ultrafiltration membrane flux and mechanical properties. At the same time, it simplifies the structure of the ultrafiltration system, reduces costs, and improves efficiency, which is conducive to the widespread use of ultrafiltration membranes.

[0054] In one specific embodiment, such as Figure 2 , Figure 3 As shown, the ultrafiltration module 10 includes a flat sheet membrane filter, which includes an upper housing 11, a lower housing 12, and a flat sheet ultrafiltration membrane 13; wherein the flat sheet ultrafiltration membrane 13 is disposed between the upper housing 11 and the lower housing 12, and the upper housing 11 and the lower housing 12 are detachably and fixedly connected.

[0055] Both the upper housing 11 and the lower housing 12 are made of 304 stainless steel. A water inlet pipe interface 15 is fixedly connected to the upper surface of the upper housing 11, and a water outlet pipe interface 16 is fixedly connected to the lower surface of the lower housing 12. Both the water inlet pipe interface 15 and the water outlet pipe interface 16 can be fixedly connected to a 25mm silicone tubing.

[0056] In one specific embodiment, such as Figure 4 As shown, the raw water module 20 includes a first stainless steel water storage tank 21. The top of the first stainless steel water storage tank 21 is provided with a first pressure gauge 22, a first safety valve 23, a first exhaust valve 24 and a first air inlet 25. The bottom of the first stainless steel water storage tank 21 is provided with a water outlet 26. The water outlet 26 is connected to the water inlet pipeline interface 15 of the ultrafiltration module 10 through a 25mm silicone tube. The first air inlet 25 is connected to the air outlet of the pressurization module 40 through a first air supply pipeline 60.

[0057] In one specific embodiment, such as Figure 5 As shown, the water production module 30 includes a second stainless steel water storage tank 31. A second pressure gauge 32, a second safety valve 33, a second vent valve 34, and a second air inlet 35 are provided on the top of the second stainless steel water storage tank 31. A water inlet 36 is provided at the bottom of the second stainless steel water storage tank 31. The water inlet 36 is connected to the water outlet pipeline interface 16 of the ultrafiltration module 10 through a 25mm silicone tubing. The second air inlet 35 is connected to the air outlet of the pressurization module 40 through a second air supply pipeline 70.

[0058] In one specific embodiment, such as Figure 5 As shown, the pressurization module 40 includes a gas storage cylinder, the top of which is provided with an outlet connected to the first gas supply line 60 and / or the second gas supply line 70.

[0059] Preferably, the gas cylinder is made of stainless steel, and there is one or two gas cylinders. When there is one gas cylinder, the gas outlet of the gas cylinder is connected to the first gas supply line 60 and the second gas supply line 70 respectively; when there are two gas cylinders, the gas outlet of one gas cylinder is connected to the first gas supply line 60, and the gas outlet of the other gas cylinder is connected to the second gas supply line 70.

[0060] More preferably, the pressurizing medium in the gas storage cylinder is nitrogen.

[0061] In one specific embodiment, the outlet range of the first pressure regulating valve 61 and the second pressure regulating valve 71 is 0 to 0.25 MPa.

[0062] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An ultrafiltration system capable of achieving high outlet water pressure, characterized in that, The application relates to a water treatment device, which comprises the following components: an ultrafiltration module (10); a raw water module (20), a water outlet (26) at the bottom of the raw water module (20) being communicated with a water inlet end of the ultrafiltration module (10); a product water module (30), a water inlet (36) at the bottom of the product water module (30) being communicated with a water outlet end of the ultrafiltration module (10); a pressurizing module (40), an air outlet of the pressurizing module (40) being communicated with a first air inlet (25) at the top of the raw water module (20) through a first air supply pipeline (60), and a first pressure regulating valve (61) for regulating the water inlet end pressure of the ultrafiltration module (10) being arranged on the first air supply pipeline (60); the air outlet of the pressurizing module (40) is communicated with a second air inlet (35) at the top of the product water module (30) through a second air supply pipeline (70), and a second pressure regulating valve (71) for regulating the water outlet end pressure of the ultrafiltration module (10) being arranged on the second air supply pipeline (70); a control module (50), the control module (50) being in control connection with the first pressure regulating valve (61) and the second pressure regulating valve (71) and being used for controlling the pressure difference between the water inlet end and the water outlet end of the ultrafiltration module (10).

2. The ultrafiltration system capable of achieving high outlet water pressure according to claim 1, characterized in that, The ultrafiltration module (10) comprises a flat plate membrane filter, the flat plate membrane filter comprises an upper shell (11), a lower shell (12) and a flat plate ultrafiltration membrane (13), the flat plate ultrafiltration membrane (13) is arranged between the upper shell (11) and the lower shell (12), and the upper shell (11) and the lower shell (12) are detachably fixedly connected.

3. The ultrafiltration system capable of achieving high outlet water pressure according to claim 1, characterized in that, The raw water module (20) comprises a first stainless steel water storage tank (21), the top of the first stainless steel water storage tank (21) is provided with a first pressure gauge (22), a first safety valve (23), a first exhaust valve (24) and a first air inlet (25), and the bottom of the first stainless steel water storage tank (21) is provided with a water outlet (26).

4. The ultrafiltration system capable of achieving high outlet water pressure according to claim 1, wherein, The product water module (30) comprises a second stainless steel water storage tank (31), the top of the second stainless steel water storage tank (31) is provided with a second pressure gauge (32), a second safety valve (33), a second exhaust valve (34) and a second air inlet (35), and the bottom of the second stainless steel water storage tank (31) is provided with a water inlet (36).

5. The ultrafiltration system capable of achieving high outlet water pressure according to claim 1, wherein, The pressurizing module (40) comprises a gas storage cylinder, the top of the gas storage cylinder is provided with an air outlet connected with the first air supply pipeline (60) and / or the second air supply pipeline (70).

6. The ultrafiltration system capable of achieving high outlet water pressure according to claim 5, characterized in that, The number of the gas storage cylinders is one or two.

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