Water supply system for residential building

Abstract

The utility model relates to the technical field of secondary pressurized water supply of residential buildings, in particular to a water supply system for residential buildings, which comprises an ultrafiltration device, a compressed air supply device, a cleaning pump, a backwashing pump and a water purification tank, the ultrafiltration device is provided with a water inlet and a water outlet, the water inlet is communicated with a municipal water supply system, the water outlet is communicated with the water purification tank, and the water purification tank is communicated with users; the air outlet end of the compressed air supply device is connected with a first valve body; the first valve body is communicated with the water inlet; the liquid inlet end of the cleaning pump is communicated with the water purifying tank, and the liquid outlet end of the cleaning pump is connected with a second valve body which is communicated with the water inlet; the liquid inlet end of the backwashing pump is communicated with the water purifying tank, the liquid outlet end of the backwashing pump is connected with a third valve body, and the third valve body is communicated with the water outlet; the ultrafiltration device of the water supply system for the residential building can be cleaned with high quality, so that the service life of the ultrafiltration device is prolonged, and the use cost of the water supply system for the residential building is lower.

Description

Technical Field

[0001] This invention relates to the field of secondary pressurized water supply technology for residential buildings, and in particular to a water supply system for residential buildings. Background Technology

[0002] Municipal water supply networks typically only guarantee normal water pressure for buildings up to six stories high. High-rise residential buildings require pump rooms to deliver water to higher floors via secondary pressurization, ensuring stable water pressure for every household. Although municipal water is treated, tap water travels a long distance through the network from the treatment plant to the user. Some compounds decompose during this process, and chemical reactions occur between the water and the pipe walls. Residual bacteria in the water can also multiply, often altering the water quality within the network. Furthermore, the further interaction between organic matter and disinfectants in the water supply network can increase the concentration of chlorination disinfection byproducts, leading to higher concentrations of halogenated organic compounds in the tap water and impacting drinking water quality. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a residential building water supply system that can perform secondary purification of tap water and has a low operating cost.

[0004] To achieve the above objectives, the present invention provides a water supply system for residential buildings, comprising: an ultrafiltration device, a compressed air supply device, a cleaning pump, a backwash pump, and a clean water tank;

[0005] The ultrafiltration device has an inlet and an outlet. The inlet is connected to the municipal water supply system, and the outlet is connected to the purified water tank, which is connected to the user.

[0006] The air outlet of the compressed air supply device is connected to a first valve body, and the first valve body is connected to the water inlet.

[0007] The inlet of the cleaning pump is connected to the clean water tank, and the outlet of the cleaning pump is connected to a second valve body, which is connected to the water inlet.

[0008] The inlet of the backwash pump is connected to the clean water tank, and the outlet of the backwash pump is connected to a third valve body, which is connected to the water outlet.

[0009] As a preferred embodiment, the water supply system for residential buildings further includes a backwashing dosing device and a backwashing dosing valve, wherein the outlet end of the backwashing dosing device is connected to the backwashing dosing valve, and the backwashing dosing valve is connected to the water outlet.

[0010] As a preferred embodiment, the backwashing dosing device includes a dosing pump, an acid storage tank, and an alkali storage tank. The inlet end of the dosing pump is connected to a fourth valve body and a fifth valve body. The fourth valve body is connected to the acid storage tank, and the fifth valve body is connected to the alkali storage tank.

[0011] As a preferred embodiment, the water supply system for residential buildings further includes a sewage collection tank, a first pipe body, and a sixth valve body. One end of the first pipe body is connected to the water inlet, and the other end is connected to the sewage collection tank. The sixth valve body is disposed on the first pipe body.

[0012] As a preferred embodiment, the water supply system for residential buildings further includes a chlorine dioxide dosing device and a chlorine dioxide dosing valve, wherein the outlet of the chlorine dioxide dosing device is connected to the chlorine dioxide dosing valve, and the chlorine dioxide dosing valve is connected to the water outlet.

[0013] As a preferred embodiment, the water supply system for residential buildings further includes a security filter, the inlet of which is connected to the municipal water supply system, and the outlet of which is connected to the inlet.

[0014] As a preferred embodiment, the water supply system for residential buildings further includes a raw water tank and a booster pump. The raw water tank is connected to the municipal water supply system, the inlet of the booster pump is connected to the raw water tank, and the outlet of the booster pump is connected to the inlet of the security filter.

[0015] As a preferred embodiment, the water supply system for residential buildings further includes a second pipe and a seventh valve body. One end of the second pipe is connected to the outlet of the booster pump, and the other end is connected to the purified water tank. The seventh valve body is located in the second pipe.

[0016] As a preferred embodiment, the water supply system for residential buildings further includes an ultrafiltration cleaning water tank, a third pipe body, and an eighth valve body. One end of the third pipe body is connected to the outlet of the backwash pump, and the other end is connected to the ultrafiltration cleaning water tank. The eighth valve body is located in the third pipe body.

[0017] The inlet of the cleaning pump is connected to the ultrafiltration cleaning water tank.

[0018] As a preferred embodiment, the water supply system for residential buildings also includes a heater, which is disposed in the ultrafiltration cleaning water tank.

[0019] This utility model provides a water supply system for residential buildings, the advantages of which are as follows:

[0020] This utility model discloses a residential building water supply system, comprising: an ultrafiltration device, a compressed air supply device, a cleaning pump, a backwash pump, and a purified water tank; the ultrafiltration device has an inlet and an outlet, the inlet being connected to the municipal water supply system, and the outlet being connected to the purified water tank, which is connected to the user; the outlet of the compressed air supply device is connected to a first valve body, which is connected to the inlet; the inlet of the cleaning pump is connected to the purified water tank, and the outlet of the cleaning pump is connected to a second valve body, which is connected to the inlet; the inlet of the backwash pump is connected to the purified water tank, and the outlet of the backwash pump is connected to a third valve body, which is connected to the outlet; When the ultrafiltration device is in operation, it can perform secondary purification of tap water; closing the second valve and opening the compressed air supply device and the first valve can perform forward air washing of the ultrafiltration device; simultaneously opening the compressed air supply device, the first valve, the second valve, and the cleaning pump can perform forward air-water mixed washing of the ultrafiltration device; closing the first valve and opening the second valve and the cleaning pump can perform forward water washing of the ultrafiltration device; opening the third valve and the backwash pump can perform reverse flushing of the ultrafiltration device; thus, the ultrafiltration device can be cleaned with high quality, improving its service life and reducing the operating cost of the water supply system for residential buildings. Attached Figure Description

[0021] Figure 1 This is a flowchart of the water supply system for residential buildings according to this utility model;

[0022] In the diagram, 1. Ultrafiltration unit, 11. Inlet, 12. Outlet, 2. Compressed air supply unit, 21. Air compressor, 22. Dryer, 23. Air storage tank, 3. Cleaning pump, 4. Backwash pump, 51. Clean water tank, 52. Raw water tank, 61. First valve body, 62. Second valve body, 63. Third valve body, 71. Backwash dosing device, 72. Backwash dosing valve, 73. Sewage collection tank, 74. First pipe body, 75. Sixth valve body, 76. Chlorine dioxide dosing device, 77. Chlorine dioxide dosing valve, 81. Security filter, 82. Booster pump, 83. Second pipe body, 84. Seventh valve body, 85. Ultrafiltration cleaning water tank, 86. Third pipe body, 87. Eighth valve body, 88. Heater, 89. Sewage pipe, 90. Ninth valve body. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms; these terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information. It should be understood that the term "connection" is used in this utility model to describe the connection relationship between pumps, valves, and containers; the connection in this utility model can be a direct connection or an indirect connection through a pipeline.

[0025] like Figure 1As shown, a preferred embodiment of the water supply system for residential buildings according to this utility model includes: an ultrafiltration device 1, a compressed air supply device 2, a cleaning pump 3, a backwash pump 4, and a purified water tank 51; the ultrafiltration device 1 has an inlet 11 and an outlet 12, the inlet 11 is connected to the municipal water supply system, the outlet 12 is connected to the purified water tank 51, and the purified water tank 51 is connected to the user; the air outlet of the compressed air supply device 2 is connected to a first valve body 61, which is connected to the inlet 11; the liquid inlet of the cleaning pump 3 is connected to the purified water tank 51, and the liquid outlet of the cleaning pump 3 is connected to a second valve body 62, which is connected to the inlet 11; the liquid inlet of the backwash pump 4 is connected to the purified water tank 51, and the liquid outlet of the backwash pump 4 is connected to a third valve body 63, which is connected to the outlet 12. In use, the ultrafiltration device 1 can perform secondary purification of tap water, removing bacteria and halogenated organic matter. In this embodiment, the ultrafiltration device 1 uses a ceramic filter membrane, a high-molecular semi-permeable membrane with a pore size of 1nm to 100nm. It can trap most suspended solids and colloids, and features high temperature resistance, chemical corrosion resistance, high mechanical strength, and long service life. The ultrafiltration device 1 can remove secondary pollution generated during pipeline transportation, thereby ensuring the safety of water quality at the user's end and solving the "last mile" problem of water supply. When the outlet water pressure or water volume of the ultrafiltration device 1 decreases, a forward air wash is performed first, followed by a forward air-water mixed wash, then a forward water wash, and finally a reverse water wash. During the forward air wash, the second valve body 62 is first closed, and then the compressed air supply device 2 and the first valve body 61 are turned on. Compressed air enters the inlet 11 of the ultrafiltration device 1 through the first valve body 61 to perform a forward air wash on the ultrafiltration device 1. After air washing is completed, the compressed air supply device 2, the first valve body 61, the second valve body 62, and the cleaning pump 3 are simultaneously turned on to perform forward air-water mixed washing. During the forward air-water mixed washing process, the compressed air and the clean water drawn by the cleaning pump 3 simultaneously enter the ultrafiltration device 1. Through the synergistic effect of bubble vibration and water flow impact, the efficiency of dirt removal is improved. After the forward air-water mixed washing is completed, the first valve body 61 is closed and the second valve body 62 and the cleaning pump 3 are turned on to perform forward water washing, flushing out the dirt generated by air washing and air-water mixed washing to the outside of the ultrafiltration device 1. After the forward water washing is completed, the third valve body 63 and the backwash pump 4 are turned on to perform reverse washing of the ultrafiltration device 1, thereby enabling the ultrafiltration device 1 to be cleaned with high quality, allowing the ceramic filter membrane to be reused, improving the service life of the ultrafiltration device 1, and reducing the operating cost of the water supply system for residential buildings.

[0026] To further improve the cleaning effect, in this embodiment, the water supply system for residential buildings also includes a backwash dosing device 71 and a backwash dosing valve 72. The outlet of the backwash dosing device 71 is connected to the backwash dosing valve 72, and the backwash dosing valve 72 is connected to the outlet 12. During normal filtration, the backwash dosing valve 72 is closed. During backwashing, the backwash dosing valve 72 and the backwash dosing device are opened, and the backwash dosing device adds a chemical agent that can improve the cleaning efficiency to the ultrafiltration device 1, thereby further improving the cleaning effect.

[0027] Specifically, the backwashing dosing device 71 includes a dosing pump, an acid storage tank, and an alkali storage tank. The inlet of the dosing pump is connected to a fourth valve and a fifth valve. The fourth valve is connected to the acid storage tank, and the fifth valve is connected to the alkali storage tank. The acid storage tank contains a 0.2% hydrochloric acid solution, which effectively removes inorganic salt scale and other contaminants while minimizing damage to the filter membrane. The alkali storage tank contains a sodium hypochlorite solution with an effective chlorine concentration of 500 mg / L to 1000 mg / L, which rapidly removes organic contaminants and kills bacteria and viruses. During backwashing, the fifth valve is first opened to introduce sodium hypochlorite solution into the ultrafiltration unit 1 to remove organic contaminants and kill bacteria and viruses. After a period of time, the fifth valve is closed, the fourth valve is opened, and hydrochloric acid solution is introduced into the ultrafiltration unit 1. The hydrochloric acid removes inorganic salt scale and other contaminants, restoring membrane flux. After alkaline washing and acid washing, close the fourth and fifth valves and backwash the ultrafiltration unit 1 with purified water.

[0028] To prevent the acidic or alkaline solution flowing from the ultrafiltration device 1 during backwashing from being directly discharged into the sewer system and causing adverse effects, in this embodiment, the water supply system for residential buildings also includes a sewage collection tank 73, a first pipe 74, and a sixth valve 75. One end of the first pipe 74 is connected to the inlet 11, and the other end is connected to the sewage collection tank 73. The sixth valve 75 is located on the first pipe 74. The backwash liquid formed by acidic and alkaline backwashing of the filtration device flows from the ultrafiltration device 1 into the sewage collection tank 73. The acidic and alkaline liquids mix in the sewage collection tank 73, achieving neutralization of the acidic and alkaline liquids.

[0029] In this embodiment, the residential building water supply system also includes a chlorine dioxide dosing device 76 and a chlorine dioxide dosing valve 77. The outlet of the chlorine dioxide dosing device 76 is connected to the chlorine dioxide dosing valve 77, and the chlorine dioxide dosing valve 77 is connected to the water outlet 12. During the operation of the ultrafiltration device 1, the chlorine dioxide dosing valve 77 and the chlorine dioxide dosing device 76 are opened. The chlorine dioxide dosing device 76 adds chlorine to the purified water filtered by the ultrafiltration device 1, maintaining the residual chlorine concentration in the purified water between 0.05 mg / L and 2 mg / L, continuously inhibiting microbial regeneration, and preventing bacterial contamination in the purified water tank 51.

[0030] In this embodiment, the residential building water supply system also includes a security filter 81. The inlet of the security filter 81 is connected to the municipal water supply system, and the outlet of the security filter 81 is connected to the inlet 11. The housing of the security filter 81 is made of stainless steel SUS304. The housing contains filter bags and activated carbon. The filtration accuracy of the filter bags can be selected according to the particle size of the liquid impurities. The housing can contain multiple filter bags or one filter bag. The number of filter bags is selected according to the flow rate. The filter bags are polypropylene filter bags with a pore size of no more than 10 micrometers. The activated carbon is coconut shell activated carbon. The security filter 81 can filter impurities in the raw water. When the filter bags of the security filter 81 are full of impurities, they need to be replaced or cleaned. The activated carbon also needs to be replaced at the same time. Cleaning or replacing the filter bags is relatively simple. Just open the cover of the housing, take out the filter bags, pour out the impurities, and rinse with clean water for reuse. The security filter 81 can remove impurities and odors from the raw water ranging from 0.5 micrometers to 100 micrometers, reducing the workload of the ultrafiltration device 1.

[0031] To improve filtration efficiency, in this embodiment, the water supply system for residential buildings also includes a raw water tank 52 and a booster pump 82. The raw water tank 52 is connected to the municipal water supply system, the inlet of the booster pump 82 is connected to the raw water tank 52, and the outlet of the booster pump 82 is connected to the inlet of the security filter 81.

[0032] In this embodiment, the water supply system for residential buildings also includes a second pipe body 83 and a seventh valve body 84. One end of the second pipe body 83 is connected to the outlet of the booster pump 82, and the other end is connected to the purified water tank 51. The seventh valve body 84 is disposed on the second pipe body 83. The second pipe body 83 and the ultrafiltration device 1 form two parallel water circuits. When maintaining the ultrafiltration device 1, opening the seventh valve body 84 allows water to be supplied to the purified water tank 51 through the second pipe body 83, preventing water supply interruption at the water supply terminal.

[0033] The residential building water supply system also includes an ultrafiltration cleaning water tank 85, a third pipe body 86, and an eighth valve body 87. One end of the third pipe body 86 is connected to the outlet of the backwash pump 4, and the other end is connected to the ultrafiltration cleaning water tank 85. The eighth valve body 87 is located within the third pipe body 86. The inlet of the cleaning pump 3 is connected to the ultrafiltration cleaning water tank 85. The ultrafiltration cleaning water tank 85 has a volume of 8m³.3 The volume of the clean water tank 51 is much larger than that of the ultrafiltration cleaning water tank 85. The backwash pump 4 is used to pump clean water into the ultrafiltration cleaning water tank 85. The clean water in the ultrafiltration cleaning water tank 85 is used to perform forward cleaning of the ultrafiltration device 1, which ensures the purity of the cleaning solution and improves the cleaning effect.

[0034] Furthermore, the water supply system for residential buildings also includes a heater 88, which is installed in the ultrafiltration cleaning water tank 85. The heater 88 heats the ultrafiltration cleaning water tank 85, increasing the temperature of the cleaning solution inside the ultrafiltration cleaning water tank 85, which facilitates the dissolution of contaminants in the ultrafiltration device 1.

[0035] In this embodiment, the compressed air supply device 2 includes an air compressor 21, a dryer, and an air tank 23 connected in sequence. A first valve body 61 is connected to the air tank 23. The dryer 22 removes moisture from the compressed air produced by the air compressor 21, preventing moisture from corroding the air passages of the compressed air supply device 2. The air tank 23 acts as a buffer and pressure stabilizer, ensuring stable air washing pressure. The air compressor 21 has a discharge capacity of 1 m³ / s. 3 / min, the air storage tank 23 is 2 cubic meters, and the air compressor 21 and the dryer work together to provide the compressed air required for air washing.

[0036] In this embodiment, the ultrafiltration device 1 is equipped with 30 ceramic ultrafiltration tubes, each 1200 mm long, with a filter membrane pore size of 50 nm and a filter membrane material of alumina. The ceramic ultrafiltration tubes are arranged in parallel, and each ceramic ultrafiltration tube has one inlet 11 and two outlets 12. Each inlet 11 is connected to the first tube body 74, and one outlet 12 of each ceramic ultrafiltration tube is connected to the purified water tank 51. The other outlet 12 of each ceramic ultrafiltration tube is connected to the drain pipe 89. The drain pipe 89 is equipped with a ninth valve body 90. During the forward flushing process, the ninth valve body 90 is opened, and the flushing liquid generated during the forward flushing is discharged through the drain pipe 89.

[0037] In summary, the residential building water supply system of this utility model includes: an ultrafiltration device 1, a compressed air supply device 2, a cleaning pump 3, a backwash pump 4, and a purified water tank 51; the ultrafiltration device 1 has an inlet 11 and an outlet 12, the inlet 11 is connected to the municipal water supply system, the outlet 12 is connected to the purified water tank 51, and the purified water tank 51 is connected to the user; the air outlet of the compressed air supply device 2 is connected to a first valve body 61, which is connected to the inlet 11; the liquid inlet of the cleaning pump 3 is connected to the purified water tank 51, and the liquid outlet of the cleaning pump 3 is connected to a second valve body 62, which is connected to the inlet 11; the liquid inlet of the backwash pump 4 is connected to the purified water tank 51, and the liquid outlet of the backwash pump 4 is connected to a third valve body 63, which is connected to the user. It is connected to the outlet 12; in use, the ultrafiltration device 1 can perform secondary purification of tap water; closing the second valve body 62 and opening the compressed air supply device 2 and the first valve body 61 can perform forward air washing of the ultrafiltration device 1; simultaneously opening the compressed air supply device 2, the first valve body 61, the second valve body 62 and the cleaning pump 3 can perform forward air-water mixed washing of the ultrafiltration device 1; closing the first valve body 61 and opening the second valve body 62 and the cleaning pump 3 can perform forward water washing of the ultrafiltration device 1; opening the third valve body 63 and the backwash pump 4 can perform reverse flushing of the ultrafiltration device 1; thus, the ultrafiltration device 1 can be cleaned efficiently, improving the service life of the ultrafiltration device 1 and reducing the operating cost of the water supply system for residential buildings.

[0038] 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 substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A water supply system for residential buildings, characterized in that, include: Ultrafiltration unit (1), compressed air supply unit (2), cleaning pump (3), backwash pump (4) and clean water tank (51); The ultrafiltration device (1) has an inlet (11) and an outlet (12). The inlet (11) is connected to the municipal water supply system, and the outlet (12) is connected to the purified water tank (51). The purified water tank (51) is connected to the user. The compressed air supply device (2) has a first valve body (61) connected to its outlet end, and the first valve body (61) is connected to the water inlet (11). The inlet end of the cleaning pump (3) is connected to the clean water tank (51), and the outlet end of the cleaning pump (3) is connected to a second valve body (62), which is connected to the water inlet (11). The inlet of the backwash pump (4) is connected to the clean water tank (51), and the outlet of the backwash pump (4) is connected to a third valve body (63), which is connected to the outlet (12).

2. The water supply system for residential buildings according to claim 1, characterized in that, The water supply system for residential buildings also includes a backwash dosing device (71) and a backwash dosing valve (72). The outlet end of the backwash dosing device (71) is connected to the backwash dosing valve (72), and the backwash dosing valve (72) is connected to the outlet (12).

3. The water supply system for residential buildings according to claim 2, characterized in that, The backwashing dosing device (71) includes a dosing pump, an acid storage tank and an alkali storage tank. The inlet end of the dosing pump is connected to a fourth valve body and a fifth valve body. The fourth valve body is connected to the acid storage tank and the fifth valve body is connected to the alkali storage tank.

4. The water supply system for residential buildings according to claim 2, characterized in that, The water supply system for residential buildings also includes a sewage collection tank (73), a first pipe (74) and a sixth valve (75). One end of the first pipe (74) is connected to the water inlet (11) and the other end is connected to the sewage collection tank (73). The sixth valve (75) is located on the first pipe (74).

5. The water supply system for residential buildings according to claim 1, characterized in that, The water supply system for residential buildings also includes a chlorine dioxide dosing device (76) and a chlorine dioxide dosing valve (77). The outlet of the chlorine dioxide dosing device (76) is connected to the chlorine dioxide dosing valve (77), and the chlorine dioxide dosing valve (77) is connected to the water outlet (12).

6. The water supply system for residential buildings according to claim 1, characterized in that, The residential building water supply system also includes a security filter (81), the inlet of which is connected to the municipal water supply system, and the outlet of which is connected to the inlet (11).

7. The water supply system for residential buildings according to claim 6, characterized in that, The residential building water supply system also includes a raw water tank (52) and a booster pump (82). The raw water tank (52) is connected to the municipal water supply system. The inlet of the booster pump (82) is connected to the raw water tank (52). The outlet of the booster pump (82) is connected to the inlet of the security filter (81).

8. The water supply system for residential buildings according to claim 7, characterized in that, The water supply system for residential buildings also includes a second pipe (83) and a seventh valve (84). One end of the second pipe (83) is connected to the outlet of the booster pump (82), and the other end is connected to the water purification tank (51). The seventh valve (84) is located on the second pipe (83).

9. The water supply system for residential buildings according to claim 1, characterized in that, The water supply system for residential buildings also includes an ultrafiltration cleaning water tank (85), a third pipe (86) and an eighth valve (87). One end of the third pipe (86) is connected to the outlet of the backwash pump (4) and the other end is connected to the ultrafiltration cleaning water tank (85). The eighth valve (87) is located on the third pipe (86). The inlet of the cleaning pump (3) is connected to the ultrafiltration cleaning water tank (85).

10. The water supply system for residential buildings according to claim 9, characterized in that, The water supply system for residential buildings also includes a heater (88), which is located in the ultrafiltration cleaning water tank (85).

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