Ultrafiltration system capable of realizing high water outlet end pressure

Abstract

The invention discloses an ultrafiltration system capable of realizing high water outlet end pressure in the technical field of drinking water filtration. The ultrafiltration system comprises an ultrafiltration module, the raw water module is communicated with the water inlet end of the ultrafiltration module; the water production module is communicated with the water outlet end of the ultrafiltration module; an air outlet of the pressurizing module is communicated with the raw water module through a first air supply pipeline, and a first pressure regulating valve is arranged on the first air supply pipeline; an air outlet of the pressurizing module is communicated with the water producing module through a second air supply pipeline, and a second pressure regulating valve is arranged on the second air supply pipeline; the control module is in control connection with the first pressure regulating valve and the second pressure regulating valve and is used for controlling the pressure difference between the water inlet end and the water outlet end of the ultrafiltration module. High pressure at the water outlet end of the ultrafiltration module is achieved, stability of membrane flux and mechanical performance of the ultrafiltration membrane can be guaranteed, meanwhile, the structure of an ultrafiltration system is simplified, manufacturing cost is reduced, efficiency is improved, and application and popularization of the ultrafiltration membrane are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of drinking water filtration, and in particular to an ultrafiltration system capable of achieving high water outlet pressure. Background Art

[0002] In recent years, ultrafiltration technology has become increasingly mature and has 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, easy maintenance, low chemical sludge discharge, and high separation efficiency.

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

[0004] The process flow of the existing ultrafiltration device is: raw liquid - storage tank - pressure pump - precision filter - hollow ultrafiltration equipment - liquid storage tank - backwash water tank - backwash pump. The specific structure of the existing ultrafiltration device can refer to the ultrafiltration microfiltration system disclosed in patent document CN213569771U; but in actual production activities, the existing ultrafiltration system needs to be equipped with a backwash structure and multiple pressure pumps, which not only leads to a complex structure and high cost of the entire ultrafiltration system, but also leads to 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 the ultrafiltration system and reduce the cost has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

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

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

[0008] Ultrafiltration module;

[0009] A raw water module, wherein the water outlet of the raw water module is connected to the water inlet of the ultrafiltration module;

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

[0011] A pressurizing module, wherein the air outlet of the pressurizing module is connected to the first air inlet interface of the raw water module through a first air supply pipeline, and the first air supply pipeline is provided with a first pressure regulating valve for adjusting the pressure at the water inlet end of the ultrafiltration module; the air outlet of the pressurizing module is connected to the second air inlet interface of the water production module through a second air supply pipeline, and the second air supply pipeline is provided with a second pressure regulating valve for adjusting the pressure at the water outlet end of the ultrafiltration module;

[0012] A control module is controllably connected to the first pressure regulating valve and the second pressure regulating valve to control the pressure difference between the water inlet and the water outlet of the ultrafiltration module.

[0013] Preferably, the ultrafiltration module comprises a flat membrane filter, the flat membrane filter comprises an upper shell, a lower shell and a flat ultrafiltration membrane, the flat ultrafiltration membrane is arranged between the upper shell and the lower shell, and the upper shell and the lower shell are detachably fixedly connected.

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

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

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

[0018] Beneficial effects of the present invention:

[0019] The present invention adopts a method of boosting pressure at the water outlet, connects the pressurizing module with the raw water module through a first air supply pipeline, connects the pressurizing module with the water production module through a second air supply pipeline, and controls the pressure at the water inlet and outlet of the ultrafiltration module through a first pressure regulating valve correspondingly arranged on the first air supply pipeline and a second pressure regulating valve arranged on the second air supply pipeline, which not only achieves a high pressure at the water outlet of the ultrafiltration module, but also achieves a constant pressure difference between the water inlet and outlet of the ultrafiltration module, which can reduce the influence of impurities in the source water on the operating performance of the ultrafiltration membrane, thereby ensuring the stability of the membrane flux and mechanical properties of the ultrafiltration membrane, while simplifying the structure of the ultrafiltration system, reducing the cost, and improving the efficiency, which is conducive to the popularization and use of ultrafiltration membranes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural schematic diagram of an ultrafiltration system capable of achieving high water outlet pressure of the present invention;

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

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

[0023] Figure 4 It is a structural schematic diagram of the raw water module;

[0024] Figure 5 It is the structural schematic diagram of the water production module;.

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

[0026] Figure 7 is the Fourier spectrum of the 30 kDa RC membrane after achieving high water outlet pressure;

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

[0028] Fig. 9 This is the Raman spectrum of the 30kDa RC membrane after achieving a high water outlet pressure.

[0029] Among them: 10. Ultrafiltration module;

[0030] 11. Upper shell; 12. Lower shell; 13. Flat ultrafiltration membrane; 14. Connecting bolts; 15. Water inlet pipeline interface; 16. Water outlet pipeline interface;

[0031] 20. Raw water module;

[0032] 21. First stainless steel water storage tank; 22. First pressure gauge; 23. First safety valve; 24. First exhaust valve; 25. First air inlet interface; 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 exhaust valve; 35. Second air inlet interface; 36. Water inlet;

[0035] 40. Pressurization module;

[0036] 41. Gas cylinder;

[0037] 50. Control module;

[0038] 60. The first gas supply pipeline;

[0039] 61. The first pressure regulating valve;

[0040] 70. Second gas supply pipeline;

[0041] 71. Second pressure regulating valve;

[0042] 80. The first water pipeline;

[0043] 90. The second water pipeline. DETAILED DESCRIPTION

[0044] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0045] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0048] Examples, such as Figure 1-Figure 6 As shown, an ultrafiltration system capable of achieving high water outlet pressure, the ultrafiltration system can reduce the influence of source water on the operating performance of the ultrafiltration membrane and ensure the stability of the ultrafiltration membrane flux; the ultrafiltration system comprises:

[0049] The ultrafiltration module 10 is provided with a water inlet and a water outlet.

[0050] The raw water module 20 is provided with a water outlet 26 and a first air inlet interface 25 . The water outlet 26 is communicated with a first end of a first water delivery pipeline 80 . The second end of the first water delivery pipeline 80 is communicated with a water inlet end of the ultrafiltration module 10 .

[0051] The water production module 30 is provided with a water inlet 36 and a second air inlet interface 35 , and the water inlet 36 of the water production module 30 is connected to the first end of the second water pipeline 90 , and the second end of the second water pipeline 90 is connected to the water outlet of the ultrafiltration module 10 .

[0052] A pressurizing module 40, which is provided with an air outlet (not shown in the figure), which is connected to a first end of a first air supply pipeline 60, and a second end of the first air supply pipeline 60 is connected to a first air inlet interface 25 of the raw water module 20, and a first pressure regulating valve 61 for adjusting the water inlet pressure of the ultrafiltration module 10 is provided on the first air supply pipeline 60; the air outlet of the pressurizing module 40 is connected to a first end of a second air supply pipeline 70, and a second end of the second air supply pipeline 70 is connected to a second air inlet interface 35 of the water production module 30, and a second pressure regulating valve 71 for adjusting the water outlet pressure of the ultrafiltration module 10 is provided on the second air supply pipeline 70.

[0053] The control module 50 is respectively connected to the first pressure regulating valve 61 and the second pressure regulating valve 71 , and the control module 50 can control the pressure difference between the water inlet and the water outlet of the ultrafiltration module 10 .

[0054] The present application adopts a method of boosting pressure at the water outlet, connects the pressurizing module 40 with the raw water module 20 through a first air supply line 60, connects the pressurizing module 40 with the water production module 30 through a second air supply line 70, and controls the pressure at the water inlet and outlet of the ultrafiltration module 10 through a first pressure regulating valve 61 correspondingly arranged on the first air supply line 60 and a second pressure regulating valve 71 arranged on the second air supply line 70, which not only achieves a high pressure at the water outlet of the ultrafiltration module 10, but also achieves a constant pressure difference between the water inlet and outlet of the ultrafiltration module 10, which can reduce the influence of impurities in the source water on the operating performance of the ultrafiltration membrane, thereby ensuring the stability of the membrane flux and mechanical properties of the ultrafiltration membrane, while simplifying the structure of the ultrafiltration system, reducing the cost, and improving the efficiency, which is conducive to the promotion and use of ultrafiltration membranes.

[0055] In a specific embodiment, if Figure 2 , Figure 3 As shown, the ultrafiltration module 10 includes a flat membrane filter, which includes an upper shell 11, a lower shell 12 and a flat ultrafiltration membrane 13; wherein the flat 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.

[0056] The upper shell 11 and the lower shell 12 are both made of 304 stainless steel; a water inlet pipeline interface 15 is fixedly connected to the upper surface of the upper shell 11, and a water outlet pipeline interface 16 is fixedly connected to the lower surface of the lower shell 12. Both the water inlet pipeline interface 15 and the water outlet pipeline interface 16 can be fixedly connected to a 25mm silicone pipeline.

[0057] In a specific embodiment, if Figure 4 As shown, the raw water module 20 includes a first stainless steel water storage tank 21, a first pressure gauge 22, a first safety valve 23, a first exhaust valve 24 and a first air inlet interface 25 are provided on the top of the first stainless steel water storage tank 21, and a water outlet 26 is provided at the bottom of the first stainless steel water storage tank 21; wherein, the water outlet 26 is connected to the water inlet end pipeline interface 15 of the ultrafiltration module 10 through a 25mm silicone pipeline; the first air inlet interface 25 is connected to the air outlet of the pressurization module 40 through a first air supply pipeline 60.

[0058] In a specific embodiment, if Figure 5 As shown, the water production module 30 includes a second stainless steel water storage tank 31, on the top of which a second pressure gauge 32, a second safety valve 33, a second exhaust valve 34 and a second air inlet interface 35 are provided, and at the bottom of the second stainless steel water storage tank 31 a water inlet 36 is provided; wherein the water inlet 36 is connected to the water outlet pipeline interface 16 of the ultrafiltration module 10 through a 25mm silicone pipeline; the second air inlet interface 35 is connected to the air outlet of the pressurizing module 40 through a second air supply pipeline 70.

[0059] In a specific embodiment, if Figure 5 As shown, the pressurizing module 40 includes a gas storage bottle 41 , and a gas outlet connected to the first gas supply pipeline 60 and / or the second gas supply pipeline 70 is provided on the top of the gas storage bottle 41 .

[0060] Preferably, the gas cylinder 41 is made of stainless steel, and the number of the gas cylinders 41 is one or two. When the number of the gas cylinder 41 is one, the gas outlet of the gas cylinder 41 is communicated with the first gas supply pipeline 60 and the second gas supply pipeline 70 respectively; when the number of the gas cylinders 41 is two, the gas outlet of one gas cylinder 41 is communicated with the first gas supply pipeline 60, and the gas outlet of the other gas cylinder 41 is communicated with the second gas supply pipeline 70.

[0061] More preferably, the pressurized medium in the gas cylinder 41 is nitrogen.

[0062] In a specific embodiment, the gas outlet range of the first pressure regulating valve 61 and the second pressure regulating valve 71 is 0-0.25 MPa.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An ultrafiltration system capable of achieving high water outlet pressure, characterized in that: include: Ultrafiltration module (10); A raw water module (20), wherein a water outlet (26) of the raw water module (20) is in communication with a water inlet of the ultrafiltration module (10); A water production module (30), wherein a water inlet (36) of the water production module (30) is in communication with a water outlet of the ultrafiltration module (10); A pressurizing module (40), wherein the air outlet of the pressurizing module (40) is connected to the first air inlet interface (25) of the raw water module (20) via a first air supply pipeline (60), and the first air supply pipeline (60) is provided with a first pressure regulating valve (61) for regulating the pressure at the water inlet end of the ultrafiltration module (10); the air outlet of the pressurizing module (40) is connected to the second air inlet interface (35) of the water production module (30) via a second air supply pipeline (70), and the second air supply pipeline (70) is provided with a second pressure regulating valve (71) for regulating the pressure at the water outlet end of the ultrafiltration module (10); A control module (50), the control module (50) being controllably connected to the first pressure regulating valve (61) and the second pressure regulating valve (71), and being used to control the pressure difference between the water inlet and the water outlet of the ultrafiltration module (10).

2. An ultrafiltration system capable of achieving high water outlet pressure according to claim 1, characterized in that: The ultrafiltration module (10) comprises a flat membrane filter, the flat membrane filter comprises an upper shell (11), a lower shell (12) and a flat ultrafiltration membrane (13), the flat 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 water outlet 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 which is provided with a first pressure gauge (22), a first safety valve (23), a first exhaust valve (24) and a first air inlet interface (25), and the bottom of which is provided with a water outlet (26).

4. The ultrafiltration system capable of achieving high water outlet pressure according to claim 1, characterized in that: The water production 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 interface (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 water outlet pressure according to claim 1, characterized in that: The pressurizing module (40) comprises a gas storage bottle (41), and a gas outlet connected to a first gas supply pipeline (60) and / or a second gas supply pipeline (70) is provided at the top of the gas storage bottle (41).

6. The ultrafiltration system capable of achieving high water outlet pressure according to claim 5, characterized in that: The number of the gas storage cylinders (41) is one or two.

Images