Anti-fouling and anti-blocking device for sewage treatment reverse osmosis membrane

Abstract

The utility model discloses an anti-fouling and anti-blocking device for a sewage treatment reverse osmosis membrane, and relates to the technical field of industrial sewage treatment. The reverse osmosis membrane comprises two reverse osmosis membrane bodies, wherein the reverse osmosis membrane bodies are respectively sleeved with a packaging shell; a sewage inlet, a purified water port and a sewage outlet of the reverse osmosis membrane body are fixedly sealed and penetrate through the corresponding packaging shells respectively; a sewage injection pipe and a back-flushing sewage discharge assembly are arranged between the two packaging shells; a first electromagnetic three-way valve is arranged on the sewage injection pipe; one port of the first electromagnetic three-way valve is communicated with the sewage injection pipe, and the other two ports of the first electromagnetic three-way valve are respectively communicated with ingress pipes; the ingress pipes are communicated with the sewage inlets of the reverse osmosis membrane body in a one-to-one correspondence manner. The industrial sewage filter has the beneficial effects that the industrial sewage filter can filter industrial sewage, and can conveniently and timely realize back-flushing decontamination treatment, so that the workload is reduced, and the treatment efficiency of the industrial sewage is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial sewage treatment, in particular to an anti-fouling and blocking device for a sewage treatment reverse osmosis membrane. Background Art

[0002] Reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics made by simulating biological semipermeable membrane. The principle of reverse osmosis technology is to separate these substances and water under the action of higher osmotic pressure than the solution, based on the fact that other substances cannot pass through the semipermeable membrane. The membrane pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in water. Usually, water molecules, ions, and small molecules can pass through the membrane surface, while organic matter, colloids, inorganic scaling substances, silt particles, microorganisms, etc. will be retained on the membrane surface. However, as the filtration time accumulates, more and more substances are retained on the membrane surface, resulting in a decrease in membrane filtration flux, and even causing the membrane to be unable to continue to be used, which hinders its wide application in practice, especially the reverse osmosis membrane used in sewage treatment processes, where fouling and blockage can occur at any time.

[0003] In the process of industrial wastewater treatment, due to the large amount of pollutants, the reverse osmosis membrane can filter and intercept a large number of pollutants in a short period of time, causing pollution blockage to occur at any time. Therefore, when using reverse osmosis membrane to filter and treat industrial wastewater, in order to ensure the filtering effect of the reverse osmosis membrane, the reverse osmosis membrane needs to be stopped at short intervals for flushing or replacement, which not only increases the cost and workload of the staff, but also seriously affects the efficiency of wastewater treatment. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an anti-fouling and clogging device for a reverse osmosis membrane for sewage treatment in view of the above-mentioned technical deficiencies. The anti-fouling and clogging device can realize backwashing and decontamination treatment conveniently and timely while maintaining the filtration work of industrial sewage, thereby reducing the workload and ensuring the treatment efficiency of industrial sewage.

[0005] The technical scheme adopted by the utility model is: to provide an anti-fouling and blocking device for a reverse osmosis membrane for sewage treatment, comprising two reverse osmosis membrane bodies, the outer surfaces of which are respectively covered with packaging shells; the sewage inlet, the water purification outlet and the sewage discharge outlet of the reverse osmosis membrane body are respectively fixedly sealed and penetrate the corresponding packaging shells; a sewage injection pipe and a backwash sewage discharge assembly are arranged between the two packaging shells; a first electromagnetic three-way valve is arranged on the sewage injection pipe; one of the ports of the first electromagnetic three-way valve is connected to the sewage injection pipe, and the other two ports are respectively connected to introduction pipes; the introduction pipes are connected to the sewage inlet of the reverse osmosis membrane body one by one;

[0006] The backwash sewage discharge assembly includes a water collecting tank; the lower end of the water collecting tank is connected to a drain outlet; an electromagnetic flow valve is installed on the drain outlet; a second electromagnetic three-way valve is installed on the clean water outlet of the reverse osmosis membrane body; one port of the second electromagnetic three-way valve is connected to the clean water outlet, and the other two ports are respectively connected to the outlet pipe and the transmission pipe; the outlet pipes are connected to the water collecting tank; a booster water pump is fixed on the water collecting tank; the water suction port of the booster water pump is connected to the suction pipe, and the water outlet of the booster water pump is installed with a third electromagnetic three-way valve; the suction pipe seal is inserted into the bottom of the water collecting tank; one port of the third electromagnetic three-way valve is connected to the water outlet of the booster water pump, and the other two ports are respectively connected to two transmission pipes.

[0007] To further optimize the technical solution, a sewage treatment reverse osmosis membrane anti-fouling device has a sewage storage tank fixed outside the water collecting tank; the sewage outlet of the reverse osmosis membrane body is connected to the sewage storage tank through a discharge pipe.

[0008] To further optimize the technical solution, a liquid level meter is fixed inside a water collecting tank of an anti-fouling device for a reverse osmosis membrane for sewage treatment; the signal output end of the liquid level meter is connected to the signal input end of the processor, and the signal output end of the processor is respectively connected to the signal input end of the electromagnetic flow valve.

[0009] To further optimize the technical solution, an ultrasonic transducer is fixed on the outer wall of the packaging shell of an anti-fouling and clogging device for a reverse osmosis membrane for sewage treatment.

[0010] The beneficial effects of the utility model are:

[0011] 1. By controlling the passage through the first electromagnetic three-way valve, the inlet pipe connected to the sewage injection pipe can be switched, so that a reverse osmosis membrane body can be flexibly selected when filtering industrial sewage; by controlling the passage through the second electromagnetic three-way valve, the connection between the clean water outlet and the outlet pipe and the connection between the clean water outlet and the transmission pipe can be switched. By connecting the clean water outlet and the outlet pipe, the filtered clean water can be easily flowed into the water collection tank; the lower end of the water collection tank is connected with a drain outlet, which can drain the clean water stored in the water collection tank.

[0012] 2. The water suction port of the booster water pump is connected with a suction pipe, which is sealed and penetrated into the bottom of the water collecting tank. The booster water pump can pump out the clean water stored in the water collecting tank. The booster water pump can increase the sprayed water pressure and improve the backwashing effect; one port of the third electromagnetic three-way valve is connected with the water outlet of the booster water pump, and the other two ports are connected with two transmission pipes respectively, which can control the clean water pumped out by the booster water pump to be output from one of the transmission pipes, so that when the second electromagnetic three-way valve controls the clean water outlet to be connected with the transmission pipe, the pressurized clean water can be reversely flushed into the reverse osmosis membrane body from the clean water outlet, thereby achieving the backwashing effect on the reverse osmosis membrane body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is the logic circuit block diagram of the liquid level meter and electromagnetic flow valve.

[0015] In the figure, 1, reverse osmosis membrane body; 2, packaging shell; 3, sewage inlet; 4, water purification outlet; 5, sewage outlet; 6, sewage injection pipe; 7, first electromagnetic three-way valve; 8, inlet pipe; 9, water collecting tank; 10, drain outlet; 11, electromagnetic flow valve; 12, second electromagnetic three-way valve; 13, outlet pipe; 14, transmission pipe; 15, booster pump; 16, pumping pipe; 17, third electromagnetic three-way valve; 18, sewage storage tank; 19, discharge pipe; 20, liquid level meter; 21, ultrasonic transducer. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] like Figure 1 As shown, a fouling prevention device for a reverse osmosis membrane for sewage treatment comprises two reverse osmosis membrane bodies 1, each of which is covered with a packaging shell 2; a sewage inlet 3, a water purification port 4 and a sewage discharge port 5 of the reverse osmosis membrane body 1 are respectively fixedly sealed and penetrate the corresponding packaging shells 2; a sewage injection pipe 6 and a backwash sewage discharge assembly are arranged between the two packaging shells 2; a first electromagnetic three-way valve 7 is arranged on the sewage injection pipe 6; one of the ports of the first electromagnetic three-way valve 7 is connected to the sewage injection pipe 6, and the other two ports are respectively connected to introduction pipes 8; the introduction pipes 8 are connected to the sewage inlet 3 of the reverse osmosis membrane body 1 in a one-to-one correspondence;

[0018] like Figure 1 As shown, the backwash sewage discharge assembly includes a water collecting tank 9; the lower end of the water collecting tank 9 is connected to a drain port 10; an electromagnetic flow valve 11 is installed on the drain port 10; a second electromagnetic three-way valve 12 is installed on the clean water port 4 of the reverse osmosis membrane body 1; one port of the second electromagnetic three-way valve 12 is connected to the clean water port 4, and the other two ports are respectively connected to the outlet pipe 13 and the transmission pipe 14; the outlet pipe 13 is connected to the water collecting tank 9; a booster water pump 15 is fixed on the water collecting tank 9; the water suction port of the booster water pump 15 is connected to the suction pipe 16, and the water outlet of the booster water pump 15 is installed with a third electromagnetic three-way valve 17; the suction pipe 16 is sealed and penetrated into the bottom of the water collecting tank 9; one port of the third electromagnetic three-way valve 17 is connected to the water outlet of the booster water pump 15, and the other two ports are respectively connected to the two transmission pipes 14.

[0019] In the present technical scheme, two reverse osmosis membrane bodies 1 are used to filter and treat industrial wastewater in turn, and when one reverse osmosis membrane body 1 is filtering wastewater, the other one is backflushing and removing dirt in time. In this way, the uninterrupted filtering work is guaranteed, and the reverse osmosis membrane body 1 can be backflushed and removed in time to prevent serious blockage, thereby ensuring efficient filtration of industrial wastewater and extending the service life of the reverse osmosis membrane body 1.

[0020] First, the first electromagnetic three-way valve 7 controls the sewage injection pipe 6 to be connected with a certain inlet pipe 8. At this time, the industrial sewage can flow through the sewage injection pipe 6 and the inlet pipe 8, and then enter the corresponding reverse osmosis membrane body 1 through the corresponding sewage inlet 3. At the same time, the second electromagnetic three-way valve 12 on the reverse osmosis membrane body 1 controls the clean water port 4 to be connected with the outlet pipe 13. The clean water after the reverse osmosis membrane body 1 treats the industrial sewage can be discharged into the water collection tank 9 through the clean water port 4 and the outlet pipe 13.

[0021] In the above-mentioned process of filtering and purifying industrial sewage, the backwashing and sewage discharge assembly works at the same time. At this time, the second electromagnetic three-way valve 12 on the other reverse osmosis membrane body 1 controls the clean water port 4 to be connected with the transmission pipe 14, and the third electromagnetic three-way valve 17 controls the pumping pipe 16 of the booster pump 15 to be connected with the transmission pipe 14. The booster pump 15 extracts the filtered clean water in the water collection tank 9, and after passing through the transmission pipe 14, the clean water can be reversely flushed into the reverse osmosis membrane body 1 through the clean water port 4, so as to realize the backwashing and sewage discharge process for the other reverse osmosis membrane body 1 that is not filtering.

[0022] After a period of time, the reverse osmosis membrane body 1 that was previously performing sewage treatment is switched to backwashing and cleaning through the switching of the first electromagnetic three-way valve 7, the second electromagnetic three-way valve 12 and the third electromagnetic three-way valve 17, while the reverse osmosis body that was previously performing sewage treatment is switched to performing sewage filtering after backwashing and cleaning. Through this switching process, the efficiency of sewage filtration treatment is maintained, and the problem of inconvenient and untimely cleaning of the reverse osmosis membrane body 1 is effectively avoided.

[0023] like Figure 1 As shown, a sewage storage tank 18 is fixed outside the water collection tank 9; the sewage outlet 5 of the reverse osmosis membrane body 1 is connected to the sewage storage tank 18 through a discharge pipe 19. The waste liquid filtered by the reverse osmosis membrane body 1 or the impurities flushed out by backwashing can be centrally stored in the sewage storage tank 18, which is conducive to subsequent treatment.

[0024] like Figure 1-2 As shown, a liquid level meter 20 is fixed inside the water collecting tank 9; the signal output end of the liquid level meter 20 is connected to the signal input end of the processor, and the signal output end of the processor is connected to the signal input end of the electromagnetic flow valve 11 respectively.

[0025] The liquid level in the water collecting tank 9 can be detected in time by the liquid level meter 20, that is, the clean water storage in the water collecting tank 9 can be identified, because the water in the water collecting tank 9 needs to be pumped out during backwashing, so the water volume in the water collecting tank 9 needs to be sufficient. For this reason, when the device performs backwashing, the water volume in the water collecting tank 9 is detected by the liquid level meter 20. If the water volume is too little, the electromagnetic flow valve 11 is controlled by the processor to close the drain port 10, so that the clean water is not discharged through the drain port 10 first, but is first stored in the water collecting tank 9 to a sufficient amount, thereby ensuring that the booster pump 15 can pump out enough clean water during backwashing.

[0026] like Figure 1 As shown, ultrasonic transducers 21 are fixed to the outer wall of the packaging shell 2. The ultrasonic transducer 21 can transmit high-frequency vibration to the reverse osmosis membrane body 1 through the conduction of the liquid inside the packaging shell 2 and the reverse osmosis membrane body 1, thereby reducing the adhesion rate of dirt on the surface of the reverse osmosis membrane body 1 and helping to improve the working efficiency of the backwashing and sewage discharge assembly.

[0027] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A sewage treatment reverse osmosis membrane anti-fouling device, comprising two reverse osmosis membrane bodies (1), characterized in that: The reverse osmosis membrane body (1) is respectively covered with a packaging shell (2); the sewage inlet (3), the water purification port (4) and the sewage discharge port (5) of the reverse osmosis membrane body (1) are respectively fixed and sealed to penetrate the corresponding packaging shells (2); a sewage injection pipe (6) and a backwash sewage discharge assembly are arranged between the two packaging shells (2); a first electromagnetic three-way valve (7) is arranged on the sewage injection pipe (6); one port of the first electromagnetic three-way valve (7) is connected to the sewage injection pipe (6), and the other two ports are respectively connected to the introduction pipe (8); the introduction pipe (8) is connected to the sewage inlet (3) of the reverse osmosis membrane body (1) in a one-to-one correspondence; The backwash sewage discharge assembly comprises a water collecting tank (9); the lower end of the water collecting tank (9) is connected to a drainage port (10); an electromagnetic flow valve (11) is installed on the drainage port (10); a second electromagnetic three-way valve (12) is installed on the clean water port (4) of the reverse osmosis membrane body (1); one port of the second electromagnetic three-way valve (12) is connected to the clean water port (4) correspondingly, and the other two ports are connected to a dewatering pipe (13) and a transmission pipe (14) respectively; the dewatering pipe (13) Both are connected to the water collecting tank (9); a booster water pump (15) is fixed on the water collecting tank (9); the water suction port of the booster water pump (15) is connected to a water suction pipe (16), and the water outlet of the booster water pump (15) is installed with a third electromagnetic three-way valve (17); the water suction pipe (16) is sealed and penetrated into the bottom of the water collecting tank (9); one port of the third electromagnetic three-way valve (17) is connected to the water outlet of the booster water pump (15), and the other two ports are respectively connected to two transmission pipes (14).

2. The anti-fouling device for reverse osmosis membrane for sewage treatment according to claim 1, characterized in that: A sewage storage tank (18) is fixed outside the water collecting tank (9); the sewage outlet (5) of the reverse osmosis membrane body (1) is connected to the sewage storage tank (18) through a discharge pipe (19).

3. The anti-fouling device for reverse osmosis membrane for sewage treatment according to claim 1, characterized in that: A liquid level meter (20) is fixed inside the water collecting tank (9); the signal output end of the liquid level meter (20) is connected to the signal input end of the processor, and the signal output end of the processor is respectively connected to the signal input end of the electromagnetic flow valve (11).

4. The anti-fouling device for reverse osmosis membrane for sewage treatment according to claim 1, characterized in that: Ultrasonic transducers (21) are fixed on the outer walls of the packaging shell (2).

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