Continuous hollow fiber type ultrafiltration membrane device

Abstract

The continuous hollow fiber type ultrafiltration membrane device comprises a water inlet tank, a booster pump, an ultrafiltration membrane assembly and a water outlet tank, a water outlet of the water inlet tank is communicated with a water inlet of the booster pump through a first pipeline, and a first valve is arranged on the first pipeline; the water outlet of the booster pump is communicated with the water inlet of the ultrafiltration membrane assembly through a second pipeline; the bottom of the ultrafiltration membrane assembly is communicated with a first water outlet pipe; a second valve is arranged on the first water outlet pipe; a third pipeline is communicated with a filtrate port of the ultrafiltration membrane assembly, a fourth pipeline is communicated with the third pipeline, and the fourth pipeline is communicated with the water outlet tank; the water outlet tank is communicated with a second water outlet pipe which is provided with a third valve. The device has the effects of screening organic matters in pollutants, facilitating subsequent targeted treatment of a water body and further facilitating repeated use of the water body.

Description

Technical Field

[0001] The present application relates to the technical field of ultrafiltration membrane devices, and in particular to a continuous hollow fiber ultrafiltration membrane device. Background Art

[0002] Organic pollution in water mainly comes from organic humus. The content of organic humus in surface water is generally less than 30 mg / L, which is about 1500 times that of organic humus in groundwater. Organic humus is mainly produced by chemical and biological reactions of animal and plant residues. It has many chemical structures and large molecular weights. The main types are aromatic hydrocarbon polymers of phenol and quinone. Chemical substances can pollute and eutrophicate water bodies, which not only limits the availability and selectivity of water sources, but also seriously increases the difficulty of water treatment in water treatment processes, indirectly leading to an increase in the cost of water treatment processes. Compared with developed countries, my country's water treatment technology is still relatively backward, and people's awareness of environmental protection is not strong, so most domestic sewage has not been effectively treated and is finally discharged into rivers, causing damage to my country's water resources.

[0003] With the continuous development of industrialization and agriculture in my country, the number of pollutants such as industrial wastewater, pesticides, and fertilizers discharged into water sources has also increased, resulting in a gradual increase in the types and content of organic matter in water sources. There are various organic pollutants in the water body, and the various organic matter is mixed without screening, which is not convenient for subsequent targeted treatment of the water body, and thus not convenient for the reuse of the water body. Therefore, how to screen the organic matter in the pollutants has become an urgent problem to be solved. Utility Model Content

[0004] In order to screen the organic matter in the pollutants, facilitate the subsequent targeted treatment of the water body, and further facilitate the reuse of the water body, the present application provides a continuous hollow fiber ultrafiltration membrane device.

[0005] The present application provides a continuous hollow fiber ultrafiltration membrane device adopts the following technical solution:

[0006] A continuous hollow fiber ultrafiltration membrane device comprises a water inlet tank, a booster pump, an ultrafiltration membrane assembly and a water outlet tank;

[0007] The water outlet of the water inlet box and the water inlet of the booster pump are connected through a first pipe, and a first valve is provided on the first pipe; the water outlet of the booster pump and the water inlet of the ultrafiltration membrane assembly are connected through a second pipe;

[0008] The bottom of the ultrafiltration membrane assembly is connected to a first water outlet pipe, and a second valve is arranged on the first water outlet pipe; the filtrate outlet of the ultrafiltration membrane assembly is connected to a third pipe, and the third pipe is connected to a fourth pipe, and the fourth pipe is connected to the water outlet tank;

[0009] The water outlet box is connected with a second water outlet pipe, and the second water outlet pipe is provided with a third valve.

[0010] By adopting the above technical scheme, when screening the organic matter in the polluted water body, the first valve is opened, the second valve and the third valve are closed, the polluted water body is introduced into the water inlet tank, and then the water pressure is provided by the booster pump, and the polluted water body is input into the ultrafiltration membrane assembly to perform hollow fiber ultrafiltration. Since the booster pump provides water pressure, a pressure difference is generated on both sides of the ultrafiltration membrane in the ultrafiltration membrane assembly, so that the particle pollutants in the water body that are larger than the membrane pore size are intercepted, showing the water treatment effect of physical screening. For ease of understanding, it is assumed that the polluted water body contains two pollutants with different particle diameters, one macromolecular pollutant has a particle size that is significantly larger than the membrane pore size, and the other small molecule particle size is significantly smaller than the membrane pore size. When the two pass through the ultrafiltration membrane assembly with the pressurized water, it is difficult for the macromolecular pollutant to pass through the ultrafiltration membrane because the particle size is larger than the membrane pore size, and finally a concentrated solution is formed, while the small molecule pollutant can easily pass through the ultrafiltration membrane, and finally ultrafiltration water is formed, which enters the effluent direction for subsequent targeted treatment, so as to facilitate the screening of organic matter in the polluted water body.

[0011] Optionally, the ultrafiltration membrane assembly comprises a housing, a filter element, a top cover and a liquid outlet hopper, the top cover is connected to the top of the housing through a flange, the liquid outlet hopper is connected to the bottom of the housing through a flange, and the first water outlet pipe is connected to the liquid outlet hopper;

[0012] The filter element is arranged in the shell and a filtrate space is formed between the filter element and the shell. The filtrate port of the ultrafiltration membrane assembly is opened on the shell and communicated with the filtrate space. The filter element is arranged in a cage shape and an ultrafiltration membrane is arranged on the inner wall of the filter element. The second pipe is fixedly connected to the top cover and communicated with the internal space of the filter element.

[0013] By adopting the above technical solution, the polluted water is pressurized into the ultrafiltration membrane assembly and then enters the filter element. Small molecule pollutants and water pass through the ultrafiltration membrane and enter the filtrate space to form ultrafiltration water, and then enter the water outlet tank through the third tube body and the fourth tube body, realizing internal pressure filtration.

[0014] Optionally, a mounting ring is fixedly connected to the bottom of the housing, a first sealing ring is fixedly connected to the top surface of the mounting ring, a first positioning hole is opened on the top surface of the first sealing ring, and the first positioning hole extends into the first mounting ring; a first positioning column is fixedly connected to the bottom of the filter element, the first positioning column is inserted into the first positioning hole, and the bottom surface of the filter element abuts against the top surface of the first sealing ring;

[0015] A second sealing ring is fixedly connected to the bottom surface of the top cover, a second positioning hole is opened on the bottom surface of the second sealing ring, and the second positioning hole extends into the top cover; a second positioning column is fixedly connected to the top of the filter element, and the second positioning column is inserted into the second positioning hole.

[0016] By adopting the above technical solution, when installing the filter element, first put the filter element into the housing, rotate the filter element so that the first positioning column is rotated to be inserted into the first positioning hole, and then the top cover is placed on the housing, and the second positioning column is aligned with the second positioning hole, and then the top cover is connected to the housing through the flange, which is convenient and stable to install. The provision of the first sealing ring and the second sealing ring helps to improve the sealing between the inside of the filter element and the filtrate space, thereby improving the ultrafiltration effect.

[0017] Optionally, a filter cake is connected to the inner thread of the bottom of the filter element, a force handle is fixedly connected to the bottom surface of the filter cake, and the diameter of the filter cake is smaller than the inner diameter of the mounting ring.

[0018] By adopting the above technical solution, the filter cake can filter the mixture of macromolecular organic water and other impurities intercepted in the filter element, filter the larger impurities above the filter cake, and discharge the macromolecular organic water through the liquid outlet hopper and the first water outlet pipe. After long-term ultrafiltration, the impurities inside the filter element can be cleaned by disassembling the liquid outlet hopper and then the filter cake, and then restored and assembled after cleaning.

[0019] Optionally, a filter is installed on the second pipe.

[0020] By adopting the above technical solution, the pre-treatment filtration function can be achieved and the impurities entering the ultrafiltration membrane component can be reduced.

[0021] Optionally, the first pipe is connected to a first branch pipe, one end of the first branch pipe away from the first pipe is connected to the lower side of the water outlet box, and a fourth valve is provided on the first branch pipe;

[0022] The second pipeline is connected with a second branch pipe, one end of the second branch pipe away from the second pipeline is connected with a fourth pipeline, and the second branch pipe is provided with a fifth valve;

[0023] The second pipeline is provided with a sixth valve and a seventh valve, the sixth valve is located between the filter and the connection point between the second branch pipe and the second pipeline; the seventh valve is arranged close to the ultrafiltration membrane assembly;

[0024] An eighth valve and a ninth valve are arranged on the fourth pipeline, and the eighth valve and the ninth valve are both located above the third pipeline, the eighth valve is arranged close to the water tank, and the ninth valve is arranged close to the third pipeline;

[0025] The water inlet tank is provided with a tenth valve.

[0026] By adopting the above technical solution:

[0027] During normal water filtration and production: the first valve, the sixth valve, the seventh valve, the eighth valve and the ninth valve are opened, and the second valve, the fourth valve and the fifth valve are closed to achieve the normal water filtration and production process.

[0028] During backwashing: the second valve, the fourth valve and the fifth valve are opened, the first valve, the sixth valve, the seventh valve, the eighth valve and the ninth valve are closed, and the water in the outlet tank enters the filtrate space through the booster pump and then reversely penetrates into the filter element. Since the second valve is open at this time, the water pressure flushes out the concentrated macromolecular organic matter inside the filter element to achieve backwashing, which is convenient for the subsequent continuous ultrafiltration screening of polluted water bodies.

[0029] Optionally, an agitator is provided on the water inlet tank.

[0030] By adopting the above technical solution, powdered activated carbon can be added to the water inlet tank for pretreatment according to actual conditions, and the setting of the agitator helps to improve the uniformity of the mixing contact between the powdered activated carbon and the polluted water body.

[0031] Optionally, a flow meter and a pressure gauge are provided on the second pipeline and the fourth pipeline.

[0032] The adoption of the above technical solution is helpful to monitor the flow rate and pressure of the liquid in the second pipeline and the fourth pipeline.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. Since the booster pump provides water pressure, a pressure difference is generated on both sides of the ultrafiltration membrane in the ultrafiltration membrane assembly, so that particulate pollutants in the water body that are larger than the membrane pore size are intercepted, showing a water treatment effect of physical screening;

[0035] 2. When installing the filter element, first put the filter element into the housing, rotate the filter element so that the first positioning column rotates to insert into the first positioning hole, then put the top cover on the housing, align the second positioning column with the second positioning hole, and then connect the top cover to the housing through the flange. The installation is convenient and stable; and the provision of the first sealing ring and the second sealing ring helps to improve the sealing between the inside of the filter element and the filtrate space, thereby improving the ultrafiltration effect;

[0036] 3. It can filter and produce water normally; and the water in the water outlet tank can enter the filtrate space through the booster pump, and then reversely osmosis into the filter element. The water pressure will flush out the concentrated macromolecular organic matter inside the filter element to achieve backwashing, which is convenient for the subsequent continuous ultrafiltration screening of polluted water bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of a continuous hollow fiber ultrafiltration membrane device according to an embodiment of the present application.

[0038] Figure 2 It is a schematic diagram of the structure used to show the interior of the shell in the embodiment of the present application.

[0039] Figure 3 It is a structural schematic diagram used to show the two ends of the filter element in the embodiment of the present application.

[0040] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0041] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0042] Explanation of the reference numerals: 1. water inlet tank; 11. tenth valve; 12. agitator; 2. booster pump; 3. ultrafiltration membrane assembly; 31. first water outlet pipe; 32. second valve; 33. third pipeline; 331. fourth pipeline; 34. housing; 341. mounting ring; 342. first sealing ring; 343. first positioning hole; 35. filter element; 351. filtrate space; 352. first positioning column; 353. second sealing ring; 354. second positioning hole; 355. first Two positioning columns; 36, top cover; 37, liquid outlet bucket; 38, filter cake; 381, handle; 4, water outlet box; 41, second water outlet pipe; 42, third valve; 5, first pipeline; 51, first valve; 52, first branch pipe; 521, fourth valve; 53, second branch pipe; 531, fifth valve; 6, second pipeline; 61, filter; 62, sixth valve; 63, seventh valve; 7, eighth valve; 8, ninth valve; 9, flow meter; 91, pressure gauge. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-5This application is described in further detail.

[0044] The present application discloses a continuous hollow fiber ultrafiltration membrane device. Figure 1 The continuous hollow fiber ultrafiltration membrane device comprises an inlet tank 1, a booster pump 2, an ultrafiltration membrane assembly 3 and an outlet tank 4. The outlet of the inlet tank 1 and the inlet of the booster pump 2 are connected through a first pipe 5, and a first valve 51 is provided on the first pipe 5; the outlet of the booster pump 2 and the inlet of the ultrafiltration membrane assembly 3 are connected through a second pipe 6. The bottom of the ultrafiltration membrane assembly 3 is connected with a first outlet pipe 31, and a second valve 32 is provided on the first outlet pipe 31; the filtrate outlet of the ultrafiltration membrane assembly 3 is connected with a third pipe 33, and a fourth pipe 331 is connected to the third pipe 33, and the fourth pipe 331 is connected to the outlet tank 4. The outlet tank 4 is connected with a second outlet pipe 41, and a third valve 42 is provided on the second outlet pipe 41.

[0045] When screening organic matter in the polluted water, the first valve 51 is opened, the second valve 32 and the third valve 42 are closed, the polluted water is introduced into the water tank 1, and then the booster pump 2 provides water pressure to input the polluted water into the ultrafiltration membrane assembly 3 for hollow fiber ultrafiltration. Since the booster pump 2 provides water pressure, a pressure difference is generated on both sides of the ultrafiltration membrane in the ultrafiltration membrane assembly 3, so that particulate pollutants in the water body that are larger than the membrane pore size are intercepted, showing a water treatment effect of physical screening.

[0046] To facilitate understanding, assume that the polluted water contains two pollutants with different particle diameters, one large molecular pollutant has a particle size significantly larger than the membrane pore size, while the other small molecular particle has a particle size significantly smaller than the membrane pore size. When the two pass through the ultrafiltration membrane assembly with pressurized water, the large molecular pollutant has a particle size larger than the membrane pore size, making it difficult to pass through the ultrafiltration membrane, and finally forming a concentrated liquid, while the small molecular pollutants can easily pass through the ultrafiltration membrane, and finally form ultrafiltration water, which enters the effluent direction for subsequent targeted treatment, thereby facilitating the screening of organic matter in the polluted water.

[0047] Reference Figure 1 A tenth valve 11 is provided on the side of the bottom of the water inlet tank 1 to facilitate the entry of polluted water. A stirrer 12 is fixedly installed on the top of the water inlet tank 1. Powdered activated carbon can be added into the water inlet tank 1 for pretreatment according to actual conditions. The setting of the stirrer 12 helps to improve the uniformity of the mixing contact between the powdered activated carbon and the polluted water. A filter 61 is installed on the second pipe 6 to achieve pretreatment filtering and reduce impurities entering the ultrafiltration membrane assembly 3.

[0048] Reference Figure 1-3The ultrafiltration membrane assembly 3 includes a housing 34, a filter element 35, a top cover 36 and a liquid outlet hopper 37. The top cover 36 is connected to the top of the housing 34 through a flange, and the liquid outlet hopper 37 is connected to the bottom of the housing 34 through a flange. The first outlet pipe 31 is connected to the liquid outlet hopper 37. The filter element 35 is arranged in the housing 34 and a filtrate space 351 is formed between the filter element 35 and the housing 34. The filtrate port of the ultrafiltration membrane assembly 3 is opened on the housing 34 and is connected to the filtrate space 351. The filter element 35 is arranged in a cage shape and an ultrafiltration membrane is arranged on the inner wall of the filter element 35. The ultrafiltration membrane can be arranged according to actual conditions and is not shown in the drawings of the embodiment of the present application. The second pipeline 6 is fixedly connected to the top cover 36 and is connected to the internal space of the filter element 35. After the polluted water is pressurized into the ultrafiltration membrane assembly 3, it enters the filter element 35. Small molecular pollutants and water pass through the ultrafiltration membrane and enter the filtrate space 351 to form ultrafiltration water, and then enter the water outlet box 4 through the third tube body and the fourth tube body to achieve internal pressure filtration.

[0049] Reference Figure 2-5 The bottom of the housing 34 is fixedly connected with a mounting ring 341, and the top surface of the mounting ring 341 is fixedly connected with a first sealing ring 342, and the top surface of the first sealing ring 342 is provided with two first positioning holes 343, and the first positioning holes 343 extend into the first mounting ring 341; the bottom of the filter element 35 is fixedly connected with two first positioning posts 352, and the first positioning posts 352 are correspondingly inserted into the first positioning holes 343, and the bottom surface of the filter element 35 abuts against the top surface of the first sealing ring 342. The bottom surface of the top cover 36 is fixedly connected with a second sealing ring 353, and the bottom surface of the second sealing ring 353 is provided with two second positioning holes 354, and the second positioning holes 354 extend into the top cover 36; the top of the filter element 35 is fixedly connected with two second positioning posts 355, and the second positioning posts 355 are correspondingly inserted into the second positioning holes 354.

[0050] When installing the filter element 35, first put the filter element 35 into the housing 34, rotate the filter element 35 so that the first positioning column 352 is rotated to be inserted into the first positioning hole 343, and then the top cover 36 is placed on the housing 34, and the second positioning column 355 is aligned with the second positioning hole 354, and then the top cover 36 is connected to the housing 34 through the flange, which is convenient and stable to install. The first sealing ring 342 and the second sealing ring 353 are provided to help improve the sealing between the inside of the filter element 35 and the filtrate space 351, thereby improving the ultrafiltration effect.

[0051] Reference Figure 2 and Figure 4The filter cake 38 is connected to the inner thread of the bottom of the filter element 35, and a force handle 381 is fixedly connected to the bottom surface of the filter cake 38, which is convenient for the operator to twist the filter cake 38. The diameter of the filter cake 38 is smaller than the inner diameter of the mounting ring 341. The filter cake 38 can filter the mixture of macromolecular organic water and other impurities intercepted in the filter element 35, and filter the larger impurities above the filter cake 38, so that the macromolecular organic water is discharged through the liquid outlet hopper 37 and the first water outlet pipe 31. After long-term ultrafiltration, the impurities inside the filter element 35 can be cleaned by disassembling the liquid outlet hopper 37 and then disassembling the filter cake 38, and then the assembly is restored after the cleaning is completed.

[0052] Reference Figure 1 The first pipe 5 is connected with a first branch pipe 52, and one end of the first branch pipe 52 away from the first pipe 5 is connected with the lower side of the water outlet box 4, and a fourth valve 521 is provided on the first branch pipe 52. The second pipe 6 is connected with a second branch pipe 53, and one end of the second branch pipe 53 away from the second pipe 6 is connected with the fourth pipe 331, and a fifth valve 531 is provided on the second branch pipe 53. The second pipe 6 is provided with a sixth valve 62 and a seventh valve 63, and the sixth valve 62 is located between the filter 61 and the connection between the second branch pipe 53 and the second pipe 6; the seventh valve 63 is provided near the ultrafiltration membrane assembly 3. The fourth pipe 331 is provided with an eighth valve 7 and a ninth valve 8, and the eighth valve 7 and the ninth valve 8 are both located above the third pipe 33, the eighth valve 7 is provided near the water tank, and the ninth valve 8 is provided near the third pipe 33. The second pipe 6 and the fourth pipe 331 are both provided with a flow meter 9 and a pressure gauge 91, which are helpful for monitoring the flow and pressure of the liquid in the second pipe 6 and the fourth pipe 331.

[0053] During normal water filtration and production: the first valve 51, the sixth valve 62, the seventh valve 63, the eighth valve 7 and the ninth valve 8 are opened, and the second valve 32, the fourth valve 521 and the fifth valve 531 are closed to achieve the normal water filtration and production process.

[0054] During backwashing: the second valve 32, the fourth valve 521 and the fifth valve 531 are opened, the first valve 51, the sixth valve 62, the seventh valve 63, the eighth valve 7 and the ninth valve 8 are closed, and the water in the water outlet tank 4 enters the filtrate space 351 through the booster pump 2, and then reversely osms into the filter element 35. Since the second valve 32 is open at this time, the water pressure flushes out the concentrated macromolecular organic matter in the filter element 35, realizing backwashing, which is convenient for the subsequent continuous ultrafiltration screening of the polluted water body.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A continuous hollow fiber ultrafiltration membrane device, characterized in that: It comprises a water inlet tank (1), a booster pump (2), an ultrafiltration membrane assembly (3) and a water outlet tank (4); The water outlet of the water inlet box (1) and the water inlet of the booster pump (2) are connected via a first pipe (5), and a first valve (51) is provided on the first pipe (5); the water outlet of the booster pump (2) and the water inlet of the ultrafiltration membrane assembly (3) are connected via a second pipe (6); The bottom of the ultrafiltration membrane assembly (3) is connected to a first water outlet pipe (31), and a second valve (32) is provided on the first water outlet pipe (31); the filtrate outlet of the ultrafiltration membrane assembly (3) is connected to a third pipe (33), and the third pipe (33) is connected to a fourth pipe (331), and the fourth pipe (331) is connected to a water outlet tank (4); The water outlet box (4) is connected to a second water outlet pipe (41), and the second water outlet pipe (41) is provided with a third valve (42).

2. A continuous hollow fiber ultrafiltration membrane device according to claim 1, characterized in that: The ultrafiltration membrane assembly (3) comprises a housing (34), a filter element (35), a top cover (36) and a liquid outlet hopper (37); the top cover (36) is connected to the top of the housing (34) via a flange; the liquid outlet hopper (37) is connected to the bottom of the housing (34) via a flange; and the first water outlet pipe (31) is connected to the liquid outlet hopper (37); The filter element (35) is arranged in the shell (34) and a filtrate space (351) is formed between the filter element and the shell (34). The filtrate port of the ultrafiltration membrane assembly (3) is opened on the shell (34) and communicates with the filtrate space (351). The filter element (35) is arranged in a cage shape and an ultrafiltration membrane is arranged on the inner wall of the filter element (35). The second pipe (6) is fixedly connected to the top cover (36) and communicates with the internal space of the filter element (35).

3. A continuous hollow fiber ultrafiltration membrane device according to claim 2, characterized in that: A mounting ring (341) is fixedly connected to the bottom of the housing (34), a first sealing ring (342) is fixedly connected to the top surface of the mounting ring (341), a first positioning hole (343) is opened on the top surface of the first sealing ring (342), and the first positioning hole (343) extends into the first mounting ring (341); a first positioning column (352) is fixedly connected to the bottom of the filter element (35), the first positioning column (352) is inserted into the first positioning hole (343), and the bottom surface of the filter element (35) is in contact with the top surface of the first sealing ring (342); A second sealing ring (353) is fixedly connected to the bottom surface of the top cover (36), a second positioning hole (354) is opened on the bottom surface of the second sealing ring (353), and the second positioning hole (354) extends into the top cover (36); a second positioning column (355) is fixedly connected to the top of the filter element (35), and the second positioning column (355) is inserted into the second positioning hole (354).

4. A continuous hollow fiber ultrafiltration membrane device according to claim 3, characterized in that: The bottom of the filter element (35) is internally threadedly connected with a filter cake (38), and a force handle (381) is fixedly connected to the bottom surface of the filter cake (38). The diameter of the filter cake (38) is smaller than the inner diameter of the mounting ring (341).

5. A continuous hollow fiber ultrafiltration membrane device according to any one of claims 1 to 4, characterized in that: A filter (61) is installed on the second pipe (6).

6. A continuous hollow fiber ultrafiltration membrane device according to claim 4, characterized in that: The first pipe (5) is connected to a first branch pipe (52), one end of the first branch pipe (52) away from the first pipe (5) is connected to the lower side of the water outlet box (4), and a fourth valve (521) is provided on the first branch pipe (52); The second pipe (6) is connected to a second branch pipe (53), one end of the second branch pipe (53) away from the second pipe (6) is connected to a fourth pipe (331), and a fifth valve (531) is provided on the second branch pipe (53); The second pipeline (6) is provided with a sixth valve (62) and a seventh valve (63), wherein the sixth valve (62) is located between the filter (61) and the connection point between the second branch pipe (53) and the second pipeline (6); and the seventh valve (63) is arranged close to the ultrafiltration membrane assembly (3); An eighth valve (7) and a ninth valve (8) are arranged on the fourth pipeline (331), and the eighth valve (7) and the ninth valve (8) are both located above the third pipeline (33), the eighth valve (7) is arranged close to the water tank, and the ninth valve (8) is arranged close to the third pipeline (33); The water inlet box (1) is provided with a tenth valve (11).

7. A continuous hollow fiber ultrafiltration membrane device according to any one of claims 1 to 4, characterized in that: The water inlet tank (1) is provided with an agitator (12).

8. A continuous hollow fiber ultrafiltration membrane device according to any one of claims 1 to 4, characterized in that: The second pipeline (6) and the fourth pipeline (331) are both provided with a flow meter (9) and a pressure gauge (91).

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