Column type ultrafiltration membrane cleaning system

Abstract

The utility model relates to a column type ultrafiltration membrane cleaning system, which comprises an ultrafiltration membrane, a circulating pump and a cleaning water tank, the top of the ultrafiltration membrane is provided with an ultrafiltration membrane upper end interface, the ultrafiltration membrane upper end interface is communicated with one end of a sixth valve, the other end of the sixth valve is communicated with the cleaning water tank, and the other end of the sixth valve is communicated with the circulating pump. The cleaning water tank is communicated with the circulating pump, the circulating pump is communicated with the security filter, the security filter is communicated with one end of the second valve, the other end of the second valve is communicated with a lower interface of the ultrafiltration membrane, the lower interface of the ultrafiltration membrane is connected with the ultrafiltration membrane, and the security filter is communicated with one end of the fourth valve. According to the ultrafiltration membrane cleaning device, more than two different ultrafiltration membranes can be quickly and effectively cleaned, the labor intensity of workers for cleaning the ultrafiltration membranes is reduced, the cleaning efficiency is improved, and the PH of cleaning agents is monitored and adjusted in time, so that the cleaning effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrafiltration membrane cleaning, in particular to a column type ultrafiltration membrane cleaning system. Background Art

[0002] During the membrane filtration process used in water treatment, membrane flux will continue to decrease due to contaminants or bacteria clogging the membrane pores. Once the membrane is contaminated, the ultrafiltration membrane must be cleaned promptly. Effective chemical cleaning can effectively extend the service life of the ultrafiltration membrane and significantly reduce the investment and operating costs of the ultrafiltration membrane. In order to quickly and effectively clean the ultrafiltration membrane, a cleaning system is required.

[0003] Ultrafiltration membranes are categorized as internal pressure and external pressure. These different filtration methods dictate different structures for columnar ultrafiltration membranes, primarily in the number and location of the water inlet, permeate outlet, and concentrate outlet. For external pressure columnar ultrafiltration membranes, the water inlet is located at the lower side, the permeate outlet is located at the upper side, the concentrate outlet is located directly above, and the air inlet is located directly below. For internal pressure columnar ultrafiltration membranes, the water inlet is located directly below, with two permeate outlets located at the upper and lower sides, and the concentrate outlet located directly above. Both types of ultrafiltration membranes share common cleaning methods. Cleaning the membranes typically involves a forward and backwash with pure water. Chemical cleaning requires the addition of biocides, acids, alkalis, and other chemicals during the forward and backwash cycles. During the forward wash cycle, chemicals enter the water inlet and return to the chemical tank through the permeate outlet and concentrate outlet. During the backwash cycle, chemicals enter the permeate outlet and exit through the water inlet and concentrate outlet. In actual applications, different project sites in the same area may use ultrafiltration membranes with different structures. If a cleaning system is customized for each ultrafiltration membrane, the investment cost and operating cost will be greatly increased. In order to reduce costs, a set of movable cleaning equipment is needed to serve different projects. The cleaning system involved must be compatible with two column ultrafiltration membranes with different structures. Utility Model Content

[0004] In view of the above problems, the utility model provides a column ultrafiltration membrane cleaning system, which can not only quickly and effectively clean more than two different ultrafiltration membranes, reduce the labor intensity of cleaning ultrafiltration membranes, but also improve the cleaning efficiency, monitor and timely adjust the pH of the cleaning agent, thereby improving the cleaning effect.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the technical solutions provided by the present invention are as follows:

[0006] A column ultrafiltration membrane cleaning system, comprising an ultrafiltration membrane, a circulation pump and a cleaning water tank, wherein an upper end interface of the ultrafiltration membrane is provided on the top of the ultrafiltration membrane, the upper end interface of the ultrafiltration membrane is connected to one end of a sixth valve, the other end of the sixth valve is connected to the cleaning water tank, the cleaning water tank is connected to the circulation pump, the circulation pump is connected to a security filter, the security filter is connected to one end of the second valve, the other end of the second valve is connected to the lower side interface of the ultrafiltration membrane, the lower side interface of the ultrafiltration membrane is connected to the ultrafiltration membrane, the security filter is connected to one end of the fourth valve, the other end of the fourth valve is connected to the upper side interface of the ultrafiltration membrane, the upper side interface of the ultrafiltration membrane is connected to the ultrafiltration membrane, the security filter is connected to one end of the first valve, the other end of the first valve is connected to the lower end interface of the ultrafiltration membrane, and the lower end interface of the ultrafiltration membrane is connected to the ultrafiltration membrane.

[0007] Preferably, the upper side interface of the ultrafiltration membrane is connected to one end of the fifth valve, and the other end of the fifth valve is connected to the cleaning water tank.

[0008] Preferably, the lower side interface of the ultrafiltration membrane is connected to one end of the third valve, and the other end of the third valve is connected to the cleaning water tank.

[0009] Preferably, the lower end interface of the ultrafiltration membrane is connected to the ultrafiltration membrane sewage valve.

[0010] Preferably, a cleaning water tank inlet valve is provided on the top of the cleaning water tank.

[0011] Preferably, a cleaning water tank overflow valve is provided on the side of the cleaning water tank.

[0012] Preferably, a sewage valve is provided at the bottom of the side of the cleaning water tank.

[0013] Preferably, a pH sensor is provided in the cleaning water tank.

[0014] Preferably, a stirrer is provided on the top of the cleaning water tank.

[0015] Preferably, the cleaning water tank is connected to one end of the dosing pump, and the other end of the dosing pump is connected to the dosing barrel.

[0016] The utility model has the following positive effects:

[0017] 1. The utility model connects the ultrafiltration membrane, the circulation pump and the cleaning water tank by setting different valves, so that the operation of different valves can realize the cleaning of an internal pressure type ultrafiltration membrane and an external pressure type ultrafiltration membrane. Not only is the system structure simple and functional, but it can also be configured with different concentrations of acids, alkalis, bactericides and other common membrane cleaning agents, and can control the pH of the configured agents, which can meet more than 90% of the ultrafiltration membrane cleaning needs.

[0018] 2. The utility model discloses a kind of column type ultrafiltration membrane cleaning system can realize automatic control, when all valve adopts electric valve or pneumatic valve, different circulating pipelines are quickly and accurately switched by the setting of valve system, cleaning reagent ph can also be automatically monitored and adjusted, can greatly simplify the labor intensity in the process of ultrafiltration membrane cleaning, reduce cleaning cost, increase cleaning efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is structure schematic view (one) of the utility model;

[0020] Figure 2 It is structure schematic view (two) of the utility model.

[0021] Mark number explanation in drawing:1-ultrafiltration membrane, 2-first valve, 3-second valve, 4-third valve, 5-fourth valve, 6-fifth valve, 7-sixth valve, 8-safety filter, 9-circulating pump, 10-cleaning water tank, 11-ultrafiltration membrane lower side interface, 12-ultrafiltration membrane upper side interface, 13-ultrafiltration membrane upper end interface, 14-ultrafiltration membrane lower end interface, 15-PH sensor, 16-blowdown valve, 17-dosing barrel, 18-ultrafiltration membrane blowdown valve, 19-mixer, 20-cleaning water tank water inlet valve, 21-cleaning water tank overflow valve, 22-dosing pump. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present disclosure are described herein with reference to the accompanying drawings, which include various details of the embodiments of the present disclosure to assist in understanding them. These should be considered as merely exemplary. Therefore, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, for the sake of brevity and clarity, descriptions of well-known functions and constructions are omitted from the following description.

[0023] Example 1: as Figure 1 or Figure 2As shown, a column type ultrafiltration membrane cleaning system comprises an ultrafiltration membrane 1, a circulating pump 9 and a cleaning water tank 10, the top of the ultrafiltration membrane 1 is provided with an ultrafiltration membrane upper end interface 13, the ultrafiltration membrane upper end interface 13 is communicated with one end of a sixth valve 7, the other end of the sixth valve 7 is communicated with the cleaning water tank 10, the cleaning water tank 10 is communicated with the circulating pump 9, the circulating pump 9 is communicated with a security filter 8, the security filter 8 is communicated with one end of a second valve 3, the other end of the second valve 3 is communicated with an ultrafiltration membrane lower side interface 11, the ultrafiltration membrane lower side interface 11 is connected with the ultrafiltration membrane 1, the security filter 8 is communicated with one end of a fourth valve 5, the other end of the fourth valve 5 is communicated with an ultrafiltration membrane upper side interface 12, the ultrafiltration membrane upper side interface 12 is communicated with the ultrafiltration membrane 1, the security filter 8 is communicated with one end of a first valve 2, the other end of the first valve 2 is communicated with an ultrafiltration membrane lower end interface 14, the ultrafiltration membrane lower end interface 14 is connected with the ultrafiltration membrane 1.

[0024] In the embodiment, the ultrafiltration membrane upper side interface 12 is communicated with one end of a fifth valve 6, the other end of the fifth valve 6 is communicated with the cleaning water tank 10.

[0025] In the embodiment, the ultrafiltration membrane lower side interface 11 is communicated with one end of a third valve 4, the other end of the third valve 4 is communicated with the cleaning water tank 10.

[0026] In the embodiment, the ultrafiltration membrane lower end interface 14 is communicated with an ultrafiltration membrane blowdown valve 16.

[0027] In the embodiment, the top of the cleaning water tank 10 is provided with a cleaning water tank water inlet valve 20.

[0028] In the embodiment, the side of the cleaning water tank 10 is provided with a cleaning water tank overflow valve 21.

[0029] In the embodiment, the bottom of the side of the cleaning water tank 10 is provided with a blowdown valve 16.

[0030] In the embodiment, the cleaning water tank 10 is provided with a PH sensor 15.

[0031] In the embodiment, the top of the cleaning water tank 10 is provided with a stirrer 19.

[0032] In the embodiment, the cleaning water tank 10 is connected with one end of a dosing pump 22, the other end of the dosing pump 22 is connected with a dosing barrel 17.

[0033] In this embodiment, different water flow directions can be achieved by opening and closing different valves. When performing chemical cleaning, bactericides, acids, alkalis and other chemical agents should be added during the forward washing and backwashing processes for circulated cleaning. During the forward washing cycle, the chemical agents enter from the water inlet and return to the chemical tank from the water outlet and the concentrated water outlet. During the backwash cycle, the chemical agents enter from the water outlet and exit from the water inlet and the concentrated water outlet. A chemical cleaning step is a backwash cycle of 15-30 minutes, a forward wash of 15-30 minutes, and emptying of the waste liquid. The safety filter can effectively intercept and clean impurities during the circulation process, protect the membrane fibers of the ultrafiltration membrane 1 from being scratched, and ensure the cleaning effect.

[0034] The following are all the steps for sterilizing and cleaning an external pressure ultrafiltration: the lower side interface 11 of the external pressure ultrafiltration membrane is the water inlet, the upper side interface 12 of the ultrafiltration membrane is the water outlet, and the upper end interface 13 of the ultrafiltration membrane is the concentrated water outlet. When this solution is implemented, first manually add 10% concentration of liquid sodium hypochlorite into the cleaning water tank 10, open the cleaning water tank water inlet valve 20 to dilute the high concentration sodium hypochlorite into a 1000ppm agent. At the beginning, all valves are in the closed state. First open the third valve 4, the fourth valve 5, and the sixth valve 7, and turn on the circulation pump 9 to perform a backwash cycle for 15 minutes. After the backwash cycle is completed, close the third valve 4 and the fourth valve 5, open the second valve 3 and the fifth valve 6 to perform a forward wash cycle for 15 minutes. After the forward wash is completed, open the ultrafiltration membrane sewage valve 18 and the sewage valve 16 to drain the cleaning waste liquid.

[0035] Example 2: Figure 1 As shown, the difference between this embodiment and embodiment 1 is that embodiment 1 is a step of performing a chemical cleaning on an internal pressure ultrafiltration membrane, while this embodiment uses the same cleaning device to clean an internal pressure ultrafiltration membrane.

[0036] The specific difference lies in the different valves that open and close in the pipeline system. The lower side interface 11 of the internal pressure ultrafiltration and the upper side interface 12 of the ultrafiltration membrane are the water outlet, the upper end interface 13 of the ultrafiltration membrane is the concentrate outlet, and the lower end interface 14 of the ultrafiltration membrane is the water inlet. During the forward wash cycle, the chemical agent enters from the water inlet and returns to the chemical tank from the water outlet and the concentrate outlet. During the backwash cycle, the chemical agent enters from the water outlet and exits from the water inlet and the concentrate outlet. The initial state of all valves is fully closed. For this internal pressure ultrafiltration membrane, the second valve 3, the fourth valve 5 (the fourth valve 5 can also be selected not to be opened), and the sixth valve 7 are opened during backwash; during forward wash, the second valve 3 and the fourth valve 5 are closed, and the first valve 2, the third valve 4 (the third valve 4 can also be selected not to be opened), the fifth valve 6, and the sixth valve 7 are opened. The other steps are the same as those in Example 1.

[0037] Example 3: Figure 2As shown, a column ultrafiltration membrane cleaning system includes a cleaning water tank 10, a circulation pump 9, a safety filter 8, an ultrafiltration membrane 1, a dosing pump 22, a drug barrel 17 and the entire piping system. The cleaning water tank 10 is provided with a stirrer 19, which can speed up the dilution of the cleaning water tank drug. The cleaning water tank 10 is installed with a pH sensor 15, which can detect and control the pH of the configured cleaning drug. The cleaning water tank 10 is connected to the outlet of the dosing pump 22 through a pipeline, and the inlet of the dosing pump 22 is connected to the dosing barrel 17. The cleaning water tank 10 is provided with a cleaning water tank water inlet valve 20, a cleaning water tank overflow valve 21 and a sewage valve 16. A first valve 2, a second valve 3, a third valve 4, a fourth valve 5, a fifth valve 6 and a sixth valve 7 are respectively provided between each branch of the piping system.

[0038] This program is in Figure 1 Improvements are made on the basis of the cleaning system scheme shown. Among them, all manual valves are replaced with electric valves or other automatic valves, so that all valve switches can be automatically controlled by the control program, simplifying manual operation. Among them, a stirrer 19 is installed on the cleaning water tank 10, which can speed up the dissolution and uniform mixing of the configured cleaning agent. Among them, a pH sensor 15 is installed on the cleaning water tank 10, which can monitor the pH changes of the agent in real time to provide a numerical reference basis for the cleaning effect, and control the pH of the agent in the cleaning water tank 10 at the same time. Among them, the cleaning water tank 10 is connected to the dosing pump 22 through a pipeline, and the dosing pump 22 is connected to the dosing barrel 7, which can realize the linkage between dosing and the pH sensor 15, reduce the manual workload of the dosing process, and control the pH of the agent in the cleaning water tank 10 in real time.

[0039] The following are all the steps for sterilizing and cleaning an external pressure ultrafiltration system: The lower interface 11 of the external pressure ultrafiltration membrane is the water inlet, the upper interface 12 of the ultrafiltration membrane is the water outlet, and the upper interface 13 of the ultrafiltration membrane is the concentrate outlet. To implement this solution, first add 10% concentrated liquid sodium hypochlorite to the wash water tank 10. Then, open the wash water tank inlet valve 20 to dilute the high-concentration sodium hypochlorite to 1000 ppm. Initially, all valves are closed. First, open the third valve 4, the fourth valve 5, and the sixth valve 7, and start the circulation pump 9 to perform a backwash cycle for 15 minutes. After the backwash cycle is complete, close the third valve 4 and the fourth valve 5, and open the second valve 3 and the fifth valve 6 to perform a forward wash cycle for 15 minutes. After the forward wash is complete, open the ultrafiltration membrane drain valve 18 and the drain valve 16 to drain the wastewater. This embodiment allows for fully automated dosing and cleaning. The cleaning process for the two different ultrafiltration membrane structures, external pressure and internal pressure, can be switched with one click via a PLC control program, reducing cleaning workload and increasing efficiency.

[0040] In summary, the utility model can not only quickly and effectively clean two or more different ultrafiltration membranes, reduce the labor intensity of cleaning ultrafiltration membranes, but also improve the cleaning efficiency, monitor and timely adjust the pH of the cleaning agent, thereby improving the cleaning effect.

[0041] The above specific embodiments do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure shall be included within the scope of protection of this disclosure.

Claims

1. A column type ultrafiltration membrane cleaning system, comprising an ultrafiltration membrane (1), a circulation pump (9) and a cleaning water tank (10), characterized in that: An upper end interface (13) of the ultrafiltration membrane is provided on the top of the ultrafiltration membrane (1), the upper end interface (13) of the ultrafiltration membrane is communicated with one end of the sixth valve (7), the other end of the sixth valve (7) is communicated with the cleaning water tank (10), the cleaning water tank (10) is communicated with the circulation pump (9), the circulation pump (9) is communicated with the safety filter (8), the safety filter (8) is communicated with one end of the second valve (3), the other end of the second valve (3) is communicated with the lower side interface (11) of the ultrafiltration membrane, and the ultrafiltration membrane is connected to the upper end interface (13) of the ultrafiltration membrane. The lower side interface (11) of the filter membrane is connected to the ultrafiltration membrane (1), the security filter (8) is communicated with one end of the fourth valve (5), the other end of the fourth valve (5) is communicated with the upper side interface (12) of the ultrafiltration membrane, the upper side interface (12) of the ultrafiltration membrane is communicated with the ultrafiltration membrane (1), the security filter (8) is communicated with one end of the first valve (2), the other end of the first valve (2) is communicated with the lower end interface (14) of the ultrafiltration membrane, and the lower end interface (14) of the ultrafiltration membrane is connected to the ultrafiltration membrane (1).

2. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: The upper side interface (12) of the ultrafiltration membrane is in communication with one end of the fifth valve (6), and the other end of the fifth valve (6) is in communication with the cleaning water tank (10).

3. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: The lower side interface (11) of the ultrafiltration membrane is in communication with one end of the third valve (4), and the other end of the third valve (4) is in communication with the cleaning water tank (10).

4. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: The lower end interface (14) of the ultrafiltration membrane is in communication with the ultrafiltration membrane sewage discharge valve (18).

5. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: A cleaning water tank inlet valve (20) is provided on the top of the cleaning water tank (10).

6. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: A cleaning water tank overflow valve (21) is provided on the side of the cleaning water tank (10).

7. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: A sewage discharge valve (16) is provided at the bottom of the side of the cleaning water tank (10).

8. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: A pH sensor (15) is provided in the cleaning water tank (10).

9. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: A mixer (19) is provided on the top of the cleaning water tank (10).

10. The column type ultrafiltration membrane cleaning system according to claim 1, characterized in that: The cleaning water tank (10) is connected to one end of the dosing pump (22), and the other end of the dosing pump (22) is connected to the dosing barrel (17).

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