Self-cleaning device for ceramic flat sheet membrane

Abstract

The utility model relates to the technical field of wastewater treatment equipment, and provides a self-cleaning device of a ceramic flat sheet membrane, the self-cleaning device comprises a membrane filter tank, a water producing tank and a clean water tank, a ceramic flat sheet membrane assembly is arranged in the membrane filter tank, an aeration device is arranged at the bottom of the ceramic flat sheet membrane assembly, the ceramic flat sheet membrane assembly is connected with a water producing device and a backwashing device, and the water producing device is connected with the clean water tank. The water production device and the backwashing device operate alternately, the water production device is connected with a water production tank, the backwashing device is connected with the clean water tank and the dosing device, and the backwashing device and the aeration device are connected with an ozone generator. The self-cleaning device adopts ozone oxidation to strengthen backwashing of the ceramic flat membrane, ozone and aeration are combined to strengthen gas washing and wash pollutants attached to the membrane during backwashing, meanwhile, the backwashing effect is strengthened during water washing or chemical agent backwashing, and the self-cleaning device has the advantages of being convenient to clean, good in cleaning effect and easy to operate. Meanwhile, the use of chemical backwashing agents is reduced, and the backwashing frequency is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of wastewater treatment equipment, and more specifically, relates to a self-cleaning device for a ceramic flat membrane. Background Art

[0002] The application of membrane technology has brought significant progress to wastewater treatment, offering advantages such as stable effluent quality, small footprint, no need for secondary sedimentation tanks, and simple operation. However, organic membrane contamination is a common problem, leading to complex cleaning, increased operating costs, and reduced membrane lifespan.

[0003] Although ceramic flat membranes have advantages over organic membranes such as strong pollution resistance, long service life, and large flux, they are often used in highly difficult-to-degrade industrial wastewaters such as coal chemical industry, petrochemical industry, and landfill leachate. The application conditions are complex, which affects their service life.

[0004] In order to ensure the normal use of ceramic flat membranes, mechanical flushing, ultrasound and other methods are generally used to clean ceramic flat membranes. However, this requires a complex mechanical structure and power system, and may cause the hair products to fall off to form new SS pollutants, increasing the operating load of the membrane.

[0005] Therefore, it is urgent to find a cleaning device that can be cleaned online and is easy to clean and simple to operate. Utility Model Content

[0006] In view of the shortcomings of the above-mentioned prior art methods for cleaning ceramic flat membranes, the purpose of the embodiments of the present application is to provide a self-cleaning device for ceramic flat membranes, which has the advantages of easy cleaning, simple operation, and low backwashing agent consumption.

[0007] To achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a self-cleaning device for a ceramic flat membrane, comprising: a membrane filtration tank, a water production tank and a clear water tank, a ceramic flat membrane assembly is provided in the membrane filtration tank, an aeration device is provided at the bottom of the ceramic flat membrane assembly, the ceramic flat membrane assembly is connected to a water production device and a backwashing device, the water production device and the backwashing device operate alternately, the water production device is connected to the water production tank, the backwashing device is connected to the clear water tank and the dosing device, and the backwashing device and the aeration device are connected to an ozone generator.

[0008] In one embodiment, the water production device includes a water production pipe and a water production pump and a water production valve arranged on the water production pipe. One end of the water production pipe is connected to the ceramic flat membrane assembly, and the other end is connected to the water production pool.

[0009] In one embodiment, the backwash device includes a backwash pipe and a backwash pump and a backwash valve provided on the backwash pipe. One end of the backwash pipe is connected to the ceramic flat membrane assembly, and the other end is connected to the dosing device.

[0010] In one embodiment, the dosing device includes an acid dosing device and an alkali dosing device arranged in parallel.

[0011] In one embodiment, the acid dosing device includes an acid dosing tank, an acid dosing pipe and an acid dosing pump, one end of the acid dosing pipe is connected to the backwash pipe, and the other end is connected to the acid dosing tank, and the acid dosing pump is arranged on the acid dosing pipe;

[0012] The alkali dosing device includes an alkali dosing tank, an alkali dosing pipe and an alkali dosing pump. One end of the alkali dosing pipe is connected to the backwash pipe, and the other end is connected to the alkali dosing tank. The alkali dosing pump is arranged on the alkali dosing pipe.

[0013] In one embodiment, the ozone generator is connected to the backwash pipe through a first pipe, and the ozone generator is connected to the aeration device through a second pipe. The first pipe is provided with a first valve, and the second pipe is provided with a second valve.

[0014] In one embodiment, the aeration device includes an aeration tube, a fan and an aeration plate. One end of the aeration tube is connected to the fan, and the other end is connected to the aeration plate. The aeration plate is arranged at the bottom of the ceramic flat membrane module.

[0015] The beneficial effects of the self-cleaning device for ceramic flat membranes provided in this application are:

[0016] This self-cleaning device uses ozone oxidation to enhance the backwashing of ceramic flat membranes. It not only combines ozone with aeration to enhance air washing during backwashing to flush out pollutants attached to the membrane, but also enhances the backwashing effect during water washing or chemical backwashing, removing pollution that may be attached to the membrane or inside the pores from the inside, which can greatly reduce membrane pollution. It has the advantages of easy cleaning, good cleaning effect and simple operation, while also reducing the use of chemical backwashing agents and reducing the backwashing frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a simplified structural diagram of the connection relationship of the self-cleaning device for the ceramic flat membrane provided in an embodiment of the present application.

[0019] Among them, the reference numerals in the figures are:

[0020] 1. Ozone generator; 2. Membrane filter tank; 3. Ceramic flat membrane assembly; 4. Aeration device; 5. Water production tank; 6. Fan; 7. Water production pump; 8. Water production valve; 9. Backwash valve; 10. Backwash pump; 11. Clear water tank; 12. Acid dosing pump; 13. Acid dosing tank; 14. Alkali dosing pump; 15. Alkali dosing tank. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0022] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0025] like Figure 1As shown, a self-cleaning device for a ceramic flat membrane provided in an embodiment of the present application is now described. The self-cleaning device for the ceramic flat membrane comprises: a membrane filter pool 2, a water production pool 5 and a clear water pool 11. In Qiongzhong, the clear water pool 11 is connected to the external tap water, and a ceramic flat membrane assembly 3 is provided in the membrane filter pool 2. The ceramic flat membrane assembly 3 is used to treat the wastewater introduced into the membrane filter pool 2. An aeration device 4 is provided at the bottom of the ceramic flat membrane assembly 3. The ceramic flat membrane assembly 3 is connected to a water production device and a backwashing device. The water production device and the backwashing device operate alternately, that is, when the water production device is in operation, the backwashing device stops operating, and when the backwashing device is in operation, the water production device stops operating; the water production device is connected to the water production pool 5, and the water production pool 5 is used to temporarily store water treated by the ceramic flat membrane assembly 3; the backwashing device, the clear water pool 11 and the dosing device are used to wash and chemically clean the ceramic flat membrane assembly 3, and the water washing and chemical cleaning can be carried out separately. Among them, the backwash device and the aeration device 4 are connected to the ozone generator 1. The ozone generated by the ozone generator 1 can not only combine the ozone with the air of the aeration device 4 during backwashing to aerate and flush the ceramic flat membrane assembly 3 and reduce membrane pollution, but also can be used when the backwash device is backwashing to enhance the backwash effect, perform ozone backwashing from the inside of the diaphragm of the ceramic flat membrane assembly 3, remove pollutants attached to the diaphragm or inside the pores, and increase the service life of the ceramic flat membrane assembly 3. At the same time, ozone oxidation can be used to degrade pollutants, and its oxidized tail gas can play a role in mixing and stirring.

[0026] In this embodiment, the ceramic flat-plate membrane assembly 3 is equipped with an inlet and outlet manifold. The water production device includes a water production pipe, a water production pump 7, and a water production valve 8, which are installed on the water production pipe. One end of the water production pipe is connected to the inlet and outlet manifold of the ceramic flat-plate membrane assembly 3, and the other end is connected to the water production tank 5. Water treated by the ceramic flat-plate membrane assembly 3 is discharged through the inlet and outlet manifold into the water production pipe. Under the action of the water production pump 7, it is pumped into the water production tank 5 for collection.

[0027] In this embodiment, the backwash device includes a backwash pipe, a backwash pump 10, and a backwash valve 9 mounted on the backwash pipe. One end of the backwash pipe is connected to the inlet and outlet manifolds of the ceramic flat-plate membrane assembly 3, and the other end is connected to the dosing device. In this embodiment, the backwash pipe and the water production pipe are connected in parallel. When producing water, the water production valve 8 and water production pump 7 are open, and the backwash valve 9 and backwash pump 10 are closed. During backwashing, the water production valve 8 and water production pump 7 are closed, and the backwash valve 9 and backwash pump 10 are opened.

[0028] In this embodiment, the dosing device includes an acid dosing device and an alkali dosing device arranged in parallel, so that acid or alkali is added according to demand. The acid is citric acid solution, and the alkali is sodium hypochlorite solution, or a mixture of sodium hypochlorite and sodium hydroxide.

[0029] Among them, the acid dosing device includes an acid dosing tank 13, an acid dosing pipe and an acid dosing pump 12, one end of the acid dosing pipe is connected to the backwash pipe, and the other end is connected to the acid dosing tank 13, and the acid dosing pump 12 is arranged on the acid dosing pipe; the alkali dosing device includes an alkali dosing tank 15, an alkali dosing pipe and an alkali dosing pump 14, one end of the alkali dosing pipe is connected to the backwash pipe, and the other end is connected to the alkali dosing tank 15, and the alkali dosing pump 14 is arranged on the alkali dosing pipe.

[0030] In this embodiment, the ozone generator 1 is connected to the backwash pipe via a first pipe, and the ozone generator 1 is connected to the aeration device 4 via a second pipe. A first valve is provided on the first pipe, and a second valve is provided on the second pipe. When backwashing, both the first valve and the second valve can be opened; when water is produced, the first valve is closed, and ozone enters the aeration device 4 through the second pipe for aeration. The aeration device 4 includes an aeration pipe, a fan 6, and an aeration plate. An aeration valve can also be provided on the aeration pipe. One end of the aeration pipe is connected to the fan 6, and the other end is connected to the aeration plate. The aeration plate is provided at the bottom of the ceramic flat membrane assembly 3. There are multiple aeration plates. The second pipe is located at the outlet end of the aeration valve. In this way, when the aeration valve is closed, the ozone generated by the ozone generator 1 can be aerated through the aeration plate to oxidize the wastewater.

[0031] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A self-cleaning device for a ceramic flat membrane, characterized in that: include: A membrane filtration pool (2), a water production pool (5) and a clear water pool (11); a ceramic flat membrane assembly (3) is provided in the membrane filtration pool (2); an aeration device (4) is provided at the bottom of the ceramic flat membrane assembly (3); a water production device and a backwashing device are connected to the ceramic flat membrane assembly (3); the water production device and the backwashing device operate alternately; the water production device is connected to the water production pool (5); the backwashing device is connected to the clear water pool (11) and a dosing device; and the backwashing device and the aeration device (4) are connected to an ozone generator (1).

2. The self-cleaning device for a ceramic flat membrane according to claim 1, characterized in that: The water production device comprises a water production pipe and a water production pump (7) and a water production valve (8) arranged on the water production pipe. One end of the water production pipe is connected to the ceramic flat membrane assembly (3), and the other end is connected to the water production pool (5).

3. The self-cleaning device for a ceramic flat membrane according to claim 2, characterized in that: The backwash device comprises a backwash pipe, a backwash pump (10) and a backwash valve (9) arranged on the backwash pipe. One end of the backwash pipe is connected to the ceramic flat membrane assembly (3), and the other end is connected to the dosing device.

4. The self-cleaning device for a ceramic flat membrane according to claim 3, characterized in that: The dosing device comprises an acid dosing device and an alkali dosing device which are arranged in parallel.

5. The self-cleaning device for a ceramic flat membrane according to claim 4, characterized in that: The acid dosing device comprises an acid dosing tank (13), an acid dosing pipe and an acid dosing pump (12), one end of the acid dosing pipe is connected to the backwash pipe, and the other end is connected to the acid dosing tank (13), and the acid dosing pump (12) is arranged on the acid dosing pipe; The alkali dosing device comprises an alkali dosing tank (15), an alkali dosing pipe and an alkali dosing pump (14), one end of the alkali dosing pipe is connected to the backwash pipe, and the other end is connected to the alkali dosing tank (15), and the alkali dosing pump (14) is arranged on the alkali dosing pipe.

6. The self-cleaning device for a ceramic flat membrane according to any one of claims 3 to 5, characterized in that: The ozone generator (1) is connected to the backwash pipeline via a first pipeline, and the ozone generator (1) is connected to the aeration device (4) via a second pipeline. A first valve is provided on the first pipeline, and a second valve is provided on the second pipeline.

7. The self-cleaning device for a ceramic flat membrane according to claim 6, characterized in that: The aeration device (4) comprises an aeration pipe, a fan (6) and an aeration plate. One end of the aeration pipe is connected to the fan (6), and the other end is connected to the aeration plate. The aeration plate is arranged at the bottom of the ceramic flat membrane assembly (3).

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