A decentralized safe water supply device based on flexible flat plate ultrafiltration membrane

Abstract

The application provides a kind of distributed safe water supply device based on flexible flat plate ultrafiltration membrane, belongs to water purification equipment technical field, including mobile box, the inside of mobile box is provided with partition, the partition divides mobile box into water tank and equipment box, the bottom of water tank is installed with ultrafiltration membrane assembly, the ultrafiltration membrane assembly is set to flat membrane stack, the inside of equipment box is installed with filter, aeration pipeline, outlet pipeline, blowdown pipeline and vent line respectively;The upper portion of filter is provided with filter inlet, filter drain, filter outlet, the filter inlet is connected with inlet pipeline, the filter outlet is connected with membrane pool inlet pipe;The first end of aeration pipeline is installed with fan, the rear of fan is provided with silencer, the aeration pipeline is also installed with pressure reducing valve and air inlet screen, the tail end of aeration pipeline is connected with aeration pipe.The application does not need to replace component frequently, has higher safety, equipment volume is smaller, energy consumption is lower.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, and in particular to a decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane. Background Technology

[0002] Remote areas and emergency water use require decentralized water supply. Decentralized water supply is a form of water supply in which scattered households directly use water sources such as shallow wells, deep wells, springs, and rivers. Its facilities are simple or there are no fixed facilities, but its safety is low and it requires regular water quality testing and disinfection.

[0003] Most water supply devices use activated carbon filters. For example, Chinese patent CN223034129U discloses an emergency safety water supply device with the following advantages: it can be moved to the location of use by hand-operated push handles and casters, making it easy for users to move; the motor drives synchronous wheel one to rotate, and synchronous belt drives synchronous wheel two to rotate, causing U-shaped scraper one to rotate inside the water storage tank and U-shaped scraper two to rotate inside the filter tank, which is used to scrape and clean the inner walls of the water storage tank and filter tank, effectively preventing water stains from adhering to the inner walls of the water storage tank and filter tank, and effectively improving the storage efficiency of drinking water; by filtering river water or rainwater through gauze, filter cotton, activated carbon filter, bamboo charcoal particles and activated carbon filter cotton, it can effectively filter drinking water for emergency use.

[0004] The disadvantages of the above-mentioned existing technologies are: activated carbon filters need to be replaced frequently, the filtration capacity is unstable, they cannot pass regular water quality tests for a long time, and the effluent contains a lot of suspended solids, the equipment is bulky, and the safety is low.

[0005] Multi-media filters are highly efficient water treatment devices. Their core components consist of various filter media of different particle sizes and materials, such as quartz sand, anthracite, and activated carbon. These media are layered and filled within the filter to form multiple layers of filtration media. When raw water passes through the filter, the different particle sizes of the media effectively intercept suspended solids, colloids, organic matter, and other impurities, achieving preliminary purification. Multi-media filters offer advantages such as high filtration accuracy, large water treatment capacity, and low operating costs.

[0006] Flexible flat-sheet ultrafiltration membrane modules refer to modules that utilize a new flat-sheet membrane flow channel technology, incorporating flexible textile flow channels within the membrane substrate. The membrane thickness is less than 0.8 mm, resulting in high packing density and low aeration energy consumption. A key feature is that the membrane itself can vibrate and clean itself under aeration conditions. Combined with cross-flow filtration, the online backwashing and air washing effects are significant. It can operate stably for months at high sludge concentrations without the need for chemical washing, exhibiting high safety. However, this technology has not been widely applied to decentralized water supply systems. Summary of the Invention

[0007] The purpose of this invention is to provide a decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane, solving the existing technical problems. The decentralized safe water supply device of this invention features high safety, low energy consumption, and small size.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane includes a movable housing. The movable housing is internally equipped with a partition that divides the movable housing into a water tank and an equipment tank. An ultrafiltration membrane assembly is installed at the bottom of the water tank. The ultrafiltration membrane assembly is configured as a flat-sheet membrane stack. The equipment tank is internally equipped with a filter, an aeration pipeline, a water outlet pipeline, a sewage discharge pipeline, and a venting pipeline. The filter has a filter inlet, a filter outlet, and a filter outlet at its upper part. The filter inlet is connected to the inlet pipe, and the filter outlet is connected to the membrane tank inlet pipe. A blower is installed at the beginning of the aeration pipeline, a silencer is installed behind the blower, a pressure reducing valve and an air inlet screen are also installed on the aeration pipeline, and an aeration pipe is connected to the end of the aeration pipeline. The outlet pipe is respectively connected to a pressure gauge, an ultraviolet sterilizer, a pipeline flow meter, an outlet valve, and an outlet solenoid valve; The beginning ends of the sewage pipe and the vent pipe are both connected to the bottom of the water tank. The sewage pipe is equipped with a sewage valve and the end of the sewage pipe is a sewage outlet. A filter screen is detachably connected inside the sewage pipe. A vent valve is connected to the vent pipeline, and the end of the vent pipeline is a vent outlet.

[0009] Furthermore, the ultrafiltration membrane module is configured as a flexible flat sheet membrane stack, which includes a central rod and baffles installed at both ends of the central rod. Several membrane bags are installed on the central rod, and spacer sealing rings are provided between adjacent membrane bags.

[0010] Furthermore, a controller is installed on the top of the equipment box, and the controller is electrically connected to the fan, the pressure reducing valve, the air inlet screen, the pressure gauge, the ultraviolet sterilizer, and the water outlet solenoid valve.

[0011] Furthermore, the top of the movable box is hinged with a cover, the bottom of the movable box is equipped with casters, and the partition is arranged longitudinally.

[0012] Furthermore, the aeration pipe is arranged horizontally below the ultrafiltration membrane assembly, and the surface of the aeration pipe is uniformly provided with air holes.

[0013] Furthermore, sealing rings are installed at the points where the baffle plate connects with the aeration pipe, the outlet pipe, the membrane tank inlet pipe, the sewage discharge pipe, and the venting pipe.

[0014] Furthermore, an inlet valve is installed on the membrane tank inlet pipe, and an inlet is provided on the side of the movable box for the membrane tank inlet pipe to pass through. The end of the membrane tank inlet pipe extends to the water tank.

[0015] Furthermore, the filter is internally filled with quartz sand packing material, and the filter includes a control valve, a central rod, and a water distributor mounted on the central rod.

[0016] The present invention, by adopting the above-described technical solution, has the following beneficial effects: 1. The present invention contains quartz sand inside the filter, which can efficiently remove suspended solids, colloids and organic matter, providing high-quality feed water for subsequent ultrafiltration; the flexible flat sheet ultrafiltration membrane has a pore size of 0.03-0.1μm, which completely intercepts bacteria, viruses and macromolecular pollutants, and the turbidity of the effluent is stable at <0.2 NTU, providing dual filtration protection.

[0017] 2. The membrane thickness of this invention is <0.8mm. It abandons the traditional ABS support plate and adopts a flexible textile flow channel, which increases the filling density by more than 30%. During the aeration process, the membrane shakes autonomously. Combined with the spacer design, it achieves uniform aeration and physical cleaning. It has strong anti-pollution ability, self-cleaning ability, and does not require frequent component replacement. It has high safety, small equipment size, and low energy consumption.

[0018] 3. The device of the present invention integrates an aeration pipeline, and the controller is electrically connected to the blower, the pressure reducing valve to the air inlet screen, the pressure gauge, the ultraviolet sterilizer, and the water outlet solenoid valve to achieve automated control.

[0019] 4. The venting pipeline of the present invention has a safety function to prevent short circuits in the equipment when the water tank leaks. The sewage pipeline is detachably connected with a filter screen for intercepting and wiping the filter media. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the decentralized safe water supply device of the present invention; Figure 2 This is a front sectional view of the internal structure of the decentralized safe water supply device of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the decentralized safe water supply device of the present invention without the filter tank installed; Figure 4 This is a rear sectional view of the internal structure of the decentralized safe water supply device of the present invention; Figure 5 This is a schematic diagram of the pipeline structure of the present invention; Figure 6 This is a front view of the pipeline structure of the present invention; Figure 7 This is a top view of the pipeline structure of the present invention; Figure 8 This is a second-view schematic diagram of the pipeline structure of the present invention.

[0021] In the attached diagram, 1-Mobile housing; 101-Water tank; 102-Equipment box; 2-Baffle; 3-Ultrafiltration membrane module; 4-Aeration pipeline; 401-Blower; 402-Silencer; 403-Pressure reducing valve and air inlet screen; 404-Aeration pipe; 5-Outlet pipeline; 501-Pressure gauge; 502-UV sterilizer; 503-Pipeline flow meter; 504-Outlet valve; 505-Outlet solenoid valve; 6-Membrane tank inlet pipe; 601-Inlet valve; 602-Inlet; 7-Sewage pipeline; 701-Sewage valve; 702-Sewage outlet; 8-Controller; 9-Inlet pipeline; 10-Filter tank; 1001-Filter inlet; 1002-Filter outlet; 1003-Filter outlet; 11-Vent pipeline; 1101-Vent valve; 1102-Vent outlet. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the present invention, and these aspects of the invention can be implemented even without these specific details.

[0023] like Figure 1-8As shown, a decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane includes a movable housing 1. The movable housing 1 has an internal partition 2 that divides it into a water tank 101 and an equipment housing 102. An ultrafiltration membrane assembly 3, configured as a flat-sheet membrane stack, is installed at the bottom of the water tank 101. The equipment housing 102 contains a filter 10, an aeration pipe 4, an outlet pipe 5, a sewage discharge pipe 7, and a vent pipe 11. The filter 10 has a filter inlet 1001, a filter outlet 1002, and a filter outlet 1003 at its upper part. The filter inlet 1001 is connected to an inlet pipe 9, and the filter outlet 1003 is connected to a membrane tank inlet pipe 6. A blower 401 is installed at the beginning of the aeration pipe 4, and the blower 401 is connected to the end of the aeration pipe 402. The aeration pipe 4 is equipped with a silencer 402, and a pressure reducing valve and an air inlet screen 403 are also installed on the aeration pipe 4. The tail end of the aeration pipe 4 is connected to an aeration pipe 404. The outlet pipe 5 is connected to a pressure gauge 501, an ultraviolet sterilizer 502, a pipeline flow meter 503, an outlet valve 504, and an outlet solenoid valve 505. The beginning ends of the sewage discharge pipe 7 and the vent pipe 11 are both connected to the bottom of the water tank 101. The sewage discharge pipe 7 is equipped with a sewage discharge valve 701, and the end of the sewage discharge pipe 7 is a sewage outlet 702 for discharging sludge. A filter screen is detachably connected inside the sewage discharge pipe 7 for intercepting waste. A vent valve 1101 is connected to the vent pipe 11, and the end of the vent pipe 11 is a vent outlet 1102. Water enters the filter 10 through the inlet pipe 9 via the filter inlet 1001, and after filtration by the filter 10, it enters the water tank 101, where it undergoes precise filtration by the ultrafiltration membrane module 3. Finally, it exits through the outlet pipe 5 and is disinfected by the ultraviolet sterilizer 502. The vent pipe 11 has a safety function to prevent short circuits in case of water tank leakage. The membrane thickness of this invention is <0.8mm, abandoning the traditional ABS support plate and adopting a flexible textile flow channel, increasing the filling density by more than 30%. During aeration, the membrane vibrates autonomously, combined with the spacer design, to achieve uniform aeration and physical cleaning. It has extremely strong anti-fouling ability, self-cleaning capability, and does not require frequent component replacement, resulting in high safety, small equipment size, and low energy consumption.

[0024] In an embodiment of the present invention, the ultrafiltration membrane module 3 is a flexible flat sheet membrane stack. The flexible flat sheet membrane stack includes a central rod and baffles installed at both ends of the central rod. Several membrane bags are installed on the central rod, and a spacer sealing ring is provided between adjacent membrane bags. By applying advanced water treatment technology, the final effluent turbidity can reach 0.2, and there is no need to frequently replace the components. The membrane sheets can shake and clean themselves in an aeration environment. With the cross-flow filtration, the online air washing effect is obvious. It can operate for a long time for several months without chemical washing and can stably produce water with high sludge concentration, which has high safety.

[0025] Flexible flat-sheet membranes are integrated membrane separation devices developed and produced by combining multiple advanced membrane manufacturing and application technologies. The final effluent turbidity can reach 0.2. Its core feature lies in overcoming the limitations of traditional membrane technology. This membrane employs a composite flow channel process, replacing the rigid ABS support plate of traditional flat-sheet membranes with a flexible woven flow channel, reducing the membrane thickness to below 0.8 mm, significantly increasing packing density and reducing aeration energy consumption. Simultaneously, the spacer design ensures uniform aeration between membrane sheets, and combined with a dynamic antifouling mechanism, the membrane sheets self-vibrate during aeration, creating a physical self-cleaning effect. This design allows it to operate continuously for months in high sludge concentration environments without chemical cleaning, achieving a flux of 30-120 LMH and a service life of 5-10 years, far exceeding traditional hollow fiber membranes and rigid flat-sheet membranes. Compared to traditional technologies, flexible flat-sheet membranes eliminate the defects of hollow fiber membranes (broken fibers, sludge buildup) and traditional flat-sheet membranes (large footprint, high energy consumption), while combining the advantages of hollow fiber membranes (small footprint, low energy consumption) and flat-sheet membranes (high strength, orderly membrane sheet separation, uniform aeration, and strong resistance to fouling).

[0026] In an embodiment of the present invention, a controller 8 is installed on the top of the equipment box 102. The controller 8 is electrically connected to the fan 401, the pressure reducing valve and the air inlet screen 403, the pressure gauge 501, the ultraviolet sterilizer 502 and the water outlet solenoid valve 505 to realize automated control.

[0027] In an embodiment of the present invention, the top of the movable housing 1 is hinged with a cover, and the bottom of the movable housing 1 is equipped with casters for moving the decentralized safety water supply device. The partition 2 is arranged longitudinally. The aeration pipe 404 is arranged transversely below the ultrafiltration membrane assembly 3, and the surface of the aeration pipe 404 is uniformly provided with air holes. Sealing rings are installed at the penetration points of the partition 2 with the aeration pipe 4, the outlet pipe 5, the membrane tank inlet pipe 6, the sewage discharge pipe 7, and the vent pipe 11. An inlet valve 601 is installed on the membrane tank inlet pipe 6, and an inlet 602 is provided on the side of the movable housing 1 for the membrane tank inlet pipe 6 to pass through. The end of the membrane tank inlet pipe 6 extends to the water tank 101.

[0028] In an embodiment of the present invention, the filter 10 is internally filled with quartz sand packing material. The filter 10 includes a control valve, a central rod, and a water distributor mounted on the central rod. The internal quartz sand packing of the filter can efficiently remove suspended solids, colloids, and organic matter, providing high-quality feed water for subsequent ultrafiltration. The flexible flat-plate ultrafiltration membrane has a pore size of 0.03-0.1 μm, thoroughly intercepting bacteria, viruses, and large molecular pollutants, with a stable effluent turbidity of <0.2 NTU, providing dual filtration protection.

[0029] During use, water enters the filter tank 10 through the inlet pipe 9, and after preliminary filtration, it enters the water tank 101, where it undergoes precise filtration by the ultrafiltration membrane module 3. Finally, it exits through the outlet pipe 5 and is disinfected by the ultraviolet sterilizer 502.

[0030] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane, characterized in that: The device includes a mobile housing (1), which is equipped with a partition (2) inside. The partition (2) divides the mobile housing (1) into a water tank (101) and an equipment box (102). An ultrafiltration membrane assembly (3) is installed at the bottom of the water tank (101). The ultrafiltration membrane assembly (3) is configured as a flat sheet membrane stack. A filter (10), an aeration pipe (4), an outlet pipe (5), a sewage discharge pipe (7), and a vent pipe (11) are installed inside the equipment box (102). The filter (10) is provided with a filter inlet (1001), a filter outlet (1002), and a filter outlet (1003) at the top. The filter inlet (1001) is connected to the water inlet pipe (9), and the filter outlet (1003) is connected to the membrane tank water inlet pipe (6). A blower (401) is installed at the first end of the aeration pipe (4), a silencer (402) is installed behind the blower (401), a pressure reducing valve and an air inlet screen (403) are also installed on the aeration pipe (4), and an aeration pipe (404) is connected to the tail end of the aeration pipe (4). The water outlet pipe (5) is respectively connected to a pressure gauge (501), an ultraviolet sterilizer (502), a pipeline flow meter (503), a water outlet valve (504), and a water outlet solenoid valve (505). The beginning ends of the sewage pipe (7) and the vent pipe (11) are both connected to the bottom of the water tank (101). A sewage valve (701) is provided on the sewage pipe (7). The end of the sewage pipe (7) is a sewage outlet (702). A filter screen is detachably connected inside the sewage pipe (7). The venting pipeline (11) is connected to a venting valve (1101), and the end of the venting pipeline (11) is a venting port (1102).

2. The decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane according to claim 1, characterized in that: The ultrafiltration membrane module (3) is configured as a flexible flat sheet membrane stack, which includes a central rod and baffles installed at both ends of the central rod. Several membrane bags are installed on the central rod, and a spacer sealing ring is provided between adjacent membrane bags.

3. The decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane according to claim 1, characterized in that: The top of the equipment box (102) is equipped with a controller (8), which is electrically connected to the fan (401), the pressure reducing valve and the air inlet screen (403), the pressure gauge (501), the ultraviolet sterilizer (502), and the water outlet solenoid valve (505).

4. A decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane according to claim 1, characterized in that: The top of the movable box (1) is hinged with a cover, the bottom of the movable box (1) is equipped with casters, and the partition (2) is arranged longitudinally.

5. A decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane according to claim 1, characterized in that: The aeration pipe (404) is arranged horizontally below the ultrafiltration membrane assembly (3), and the surface of the aeration pipe (404) is uniformly provided with air holes.

6. A decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane according to claim 1, characterized in that: Sealing rings are installed at the points where the partition (2) connects with the aeration pipe (4), the water outlet pipe (5), the membrane tank inlet pipe (6), the sewage discharge pipe (7), and the vent pipe (11).

7. A decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane according to claim 1, characterized in that: The membrane tank inlet pipe (6) is equipped with an inlet valve (601), and the movable box (1) has an inlet (602) on its side for the membrane tank inlet pipe (6) to pass through. The end of the membrane tank inlet pipe (6) extends to the water tank (101).

8. A decentralized safe water supply device based on a flexible flat-sheet ultrafiltration membrane according to claim 1, characterized in that: The filter (10) is filled with quartz sand packing material and includes a control valve, a central rod and a water distributor mounted on the central rod.

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