Central nanofiltration water purification system

Abstract

A central nanofiltration water purification system belongs to the technical field of water purification system. It comprises a pre-filter, a pressure stabilizing pump, two nanofiltration filter cores, a flushing electromagnetic valve one and a flushing electromagnetic valve two. The pre-filter is connected with the flushing electromagnetic valve one. One end of the pressure stabilizing pump is connected with the pre-filter, and the other end of the pressure stabilizing pump is connected with the two nanofiltration filter cores, which are connected in parallel. The nanofiltration filter core is internally provided with a hollow nanofiltration membrane wire, and the two nanofiltration filter cores are connected with the flushing electromagnetic valve two. The device can realize automatic water purification and automatic flushing, can purify water flow, effectively prevents pollutants from penetrating into the membrane wire by using the hollow nanofiltration fiber membrane, improves the service life of the filter core, restores the flow after the filter core is flushed, and achieves the purpose of long-term use.

Description

Technical Field

[0001] This utility model belongs to the technical field of water purification systems, and particularly relates to a central nanofiltration water purification system. Background Technology

[0002] In the field of whole-house water purification, a central water purifier is installed on the main water supply line to purify the water used by the entire household, protecting water-using appliances and extending their lifespan. Currently, most central water purifiers on the market use activated carbon powder and resin as their purification solution. This solution has the following problems: insufficient filtration effect, as activated carbon and resin have limited filtration capabilities and cannot effectively remove tiny particles and harmful substances from the water; short filter life, as the filter cartridges fail after a period of use, requiring frequent replacement of the internal filter media, increasing maintenance costs; the removed carbon powder and resin pollute the environment; and it cannot effectively prevent the accumulation of pollutants, leading to filter clogging and affecting water purification efficiency.

[0003] Therefore, there is an urgent need for a central nanofiltration water purification system that can improve filtration efficiency, extend filter life, and reduce environmental pollution to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a central nanofiltration water purification system to solve problems such as insufficient filtration effect, short filter life, and pollutant accumulation in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a central nanofiltration water purification system, comprising a pre-filter, a pressure stabilizing pump, two nanofiltration cartridges, a first flushing solenoid valve, and a second flushing solenoid valve; the pre-filter and the first flushing solenoid valve are connected; one end of the pressure stabilizing pump is connected to the pre-filter, and the other end of the pressure stabilizing pump is connected to the two nanofiltration cartridges, which are connected in parallel; hollow nanofiltration membrane fibers are disposed inside the nanofiltration cartridges, and the two nanofiltration cartridges are connected to the second flushing solenoid valve.

[0006] The pre-filter has a filter inlet and a filter outlet on its left and right sides, and a filter flushing port at the bottom of the pre-filter. A flushing solenoid valve is connected to the filter flushing port.

[0007] The pressure stabilizing pump is provided with a pressure stabilizing pump inlet and a pressure stabilizing pump outlet on its left and right sides.

[0008] The nanofiltration filter element is provided with a nanofiltration inlet, a nanofiltration purified water inlet, and a nanofiltration flushing port; the nanofiltration flushing port and the nanofiltration inlet are respectively located at the upper and lower ends of the nanofiltration filter element, the nanofiltration flushing port is located on the side of the nanofiltration filter element, and the flushing solenoid valve is connected to the nanofiltration flushing port.

[0009] The pre-filter, pressure stabilizing pump, and two parallel nanofiltration cartridges are connected by PE pipes or by an integrated water circuit board to form a purified water circuit.

[0010] The pre-filter, flushing solenoid valve one, two nanofiltration filter elements, and flushing solenoid valve two are connected by PE pipes or by an integrated water circuit board to form a flushing water circuit.

[0011] The flushing solenoid valve one and flushing solenoid valve two are equipped with a timed opening function.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention effectively removes pollutants such as sediment, rust, colloids, insect eggs, algae, and heavy metals from water using a nanofiltration filter element and its internal hollow nanofiltration membrane fibers. The effluent is weakly alkaline mineral water, which meets the standards for healthy drinking water. By utilizing the smooth and dense surface of the hollow nanofiltration fiber membrane, it can effectively prevent pollutants from penetrating into the membrane fibers, resulting in slow flow attenuation and minimal water loss.

[0014] This invention uses a timed rinsing function to remove contaminants from the surface of the filter element in a timely manner, significantly extending the filter element's lifespan, reducing replacement frequency and maintenance costs, and reducing the environmental pollution caused by discarded filter elements. At the same time, it reduces energy consumption through the control of a pressure-stabilizing pump.

[0015] The system of this utility model has automatic water purification and automatic rinsing functions, and users do not need to operate it manually, making it convenient to use.

[0016] This utility model discloses a central nanofiltration water purification system that reduces and minimizes filter clogging and contamination, extends filter lifespan, and restores flow rate after filter flushing, thus achieving the goal of long-term use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a central nanofiltration water purification system;

[0018] Figure 2 This is a schematic diagram of hollow nanofiltration membrane fibers;

[0019] In the diagram: 1. Filter inlet; 2. Filter outlet; 3. Pre-filter; 4. Pressure stabilizing pump; 5. Nanofiltration flushing port; 6. Nanofiltration inlet; 7. Nanofiltration purified water port; 8. Nanofiltration filter element; 9. Flushing solenoid valve two; 10. Flushing solenoid valve one; 11. Purified water path; 12. Flushing water path; 13. Filter flushing port; 14. Pressure stabilizing pump inlet; 15. Pressure stabilizing pump outlet; 16. Hollow fiber nanofiltration membrane. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-2 This utility model provides a technical solution: a central nanofiltration water purification system, including a pre-filter 3, a pressure stabilizing pump 4, two nanofiltration filter elements 8, a flushing solenoid valve 10, and a flushing solenoid valve 2 9; the pre-filter 3 and the flushing solenoid valve 10 are connected; one end of the pressure stabilizing pump 4 is connected to the pre-filter 3, and the other end of the pressure stabilizing pump 4 is connected to the two nanofiltration filter elements 8, which are connected in parallel; hollow nanofiltration membrane fibers 16 are provided inside the nanofiltration filter elements 8, and the two nanofiltration filter elements 8 are connected to the flushing solenoid valve 2 9.

[0022] The pre-filter 3 has a filter inlet 1 and a filter outlet 2 on its left and right sides, and a filter flushing port 13 at its lower end. A flushing solenoid valve 10 is connected to the filter flushing port 13. Specifically, the flushing solenoid valve 10 is located behind the filter flushing port 13. The flushing water after preliminary filtration is discharged through the flushing solenoid valve 10. The pre-filter 3 is used to pre-filter large particulate impurities in tap water. During operation, tap water enters the pre-filter 3 through the filter inlet 1. After preliminary filtration, the water flows out through the filter outlet 2 and is pressurized by the pressure pump 4. The flushing water flows out through the filter flushing port 13 and then through the flushing solenoid valve 10.

[0023] The pressure stabilizing pump 4 has a pressure stabilizing pump inlet 14 and a pressure stabilizing pump outlet 15 on its left and right sides. Water flows into the pressure stabilizing pump 4 through the pressure stabilizing pump inlet 14 and is pressurized before flowing out through the pressure stabilizing pump outlet 15, which can ensure that the water flows stably into the two parallel nanofiltration filter elements 8.

[0024] The nanofiltration filter element 8 is equipped with a nanofiltration inlet 6, a nanofiltration purified water inlet 7, and a nanofiltration flushing port 5. The nanofiltration flushing port 5 and the nanofiltration inlet 6 are respectively located at the upper and lower ends of the nanofiltration filter element 8, and the nanofiltration flushing port 5 is located on the side of the nanofiltration filter element 8. A flushing solenoid valve 9 is connected to the nanofiltration flushing port 5. Water flows through the nanofiltration inlet 6 into the hollow nanofiltration membrane fiber 16, purified water flows out through the nanofiltration purified water inlet 7, and flushing water flows out through the nanofiltration flushing port 5. After flushing, the flow rate of the nanofiltration filter element 8 is restored, ensuring long-term stable operation of the system.

[0025] The hollow nanofiltration membrane fibers 16 inside the nanofiltration cartridge 8 are used to efficiently filter pollutants such as sediment, rust, colloids, insect eggs, algae, and heavy metals from the water, producing weakly alkaline mineral water that meets healthy drinking water standards. The two parallel nanofiltration cartridges 8 can perform two filtration processes, increasing the filtration efficiency for pollutants.

[0026] Furthermore, this utility model is equipped with two parallel nanofiltration filter elements 8, which can divert and filter large flow rates of incoming water, increasing filtration efficiency. This is especially suitable for situations with large water consumption, ensuring water supply for multiple users.

[0027] Furthermore, the nanofiltration filter element 8 of this utility model can adopt the application number: 202420275090.4, patent name: a filter element structure with forward flushing function; or other filter element structures that conform to this utility model can be adopted.

[0028] The pre-filter 3, pressure stabilizing pump 4, and two parallel nanofiltration cartridges 8 are connected by PE pipes or by an integrated water circuit board to form a purified water circuit 11.

[0029] Furthermore, after the water flows out through the pressure-stabilizing pump 4, it flows into two nanofiltration cartridges 8 for filtration. After filtration, the water is combined into one stream and enters the household pipeline for convenient use.

[0030] The pre-filter 3, flushing solenoid valve 10, two nanofiltration filter elements 8, and flushing solenoid valve 2 9 are connected by PE pipes or by an integrated water circuit board to form a flushing water circuit 12.

[0031] Tap water enters the pre-filter 3 and flows out through the filter flushing port 13 to the flushing solenoid valve 10; the water flowing out of the two parallel nanofiltration filter elements 8 flows out through the nanofiltration flushing port 5 to the flushing solenoid valve 29 to flush the nanofiltration filter elements 8, and the two water flows merge into one.

[0032] The nanofiltration filter element 8 has a nanofiltration water inlet 7 connected to the household water system. When there is water in use, the pressure stabilizing pump 4 starts, and the tap water enters the pre-filter 3, then enters the pressure stabilizing pump 4. After being pressurized, it enters the parallel nanofiltration filter element 8, which plays a filtering role. The purified water enters the household pipeline through the nanofiltration filter element 8.

[0033] When the water supply at the back end stops, the pressure stabilizing pump 4 detects high pressure and stops working, and the equipment stops purifying water.

[0034] The flushing solenoid valve 10 and flushing solenoid valve 9 are used to activate the flushing function at set times. When pollutants accumulate on the surface of the filter element, they can be activated at a set time to flush the pollutants on the surface of the filter element. The flushing water is discharged through the filter flushing port 13 and the nanofiltration flushing port 5 to remove pollutants from the surface of the filter element, restore the filter element flow rate, extend the filter element life, reduce the frequency of filter element replacement, and reduce the pollution of the environment by the waste filter element.

[0035] Meanwhile, the cooperation of the pressure stabilizing pump 4 with the flushing solenoid valve 10 and the flushing solenoid valve 9 enables automatic water purification and automatic flushing, reducing manual intervention.

[0036] Furthermore, after processing, the hollow nanofiltration membrane fibers 16 have a smooth and dense surface, which effectively prevents pollutants from penetrating into the membrane fibers. The flow rate decreases slowly and minimally. Moreover, the hollow nanofiltration membrane fibers 16 possess forward flushing characteristics and the force of the water flow, flushing away pollutants accumulated on their surface. These pollutants are then discharged through the nanofiltration flushing port 5, restoring the filter element's lifespan and preventing clogging of the nanofiltration filter element 8. Through the nanofiltration filter element 8 and the hollow nanofiltration membrane fibers 16, various pollutants in the water are effectively filtered, improving the water purification effect.

[0037] Furthermore, the water purification system of this invention is suitable for use with large flow rates of water, and is especially suitable for the front end of the water inlet pipe of a villa.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A central nanofiltration water purification system, characterized in that, It includes a pre-filter (3), a pressure stabilizing pump (4), two nanofiltration cartridges (8), a first flushing solenoid valve (10), and a second flushing solenoid valve (9); the pre-filter (3) and the first flushing solenoid valve (10) are connected; one end of the pressure stabilizing pump (4) is connected to the pre-filter (3), and the other end of the pressure stabilizing pump (4) is connected to the two nanofiltration cartridges (8), and the two nanofiltration cartridges (8) are connected in parallel; hollow nanofiltration membrane fibers (16) are provided inside the nanofiltration cartridges (8), and the two nanofiltration cartridges (8) are connected to the second flushing solenoid valve (9).

2. The central nanofiltration water purification system according to claim 1, characterized in that: The pre-filter (3) is provided with a filter inlet (1) and a filter outlet (2) on its left and right sides. The pre-filter (3) is provided with a filter flushing port (13) at its lower end. The flushing solenoid valve (10) is connected to the filter flushing port (13).

3. A central nanofiltration water purification system according to claim 1, characterized in that: The pressure stabilizing pump (4) is provided with a pressure stabilizing pump inlet (14) and a pressure stabilizing pump outlet (15) on its left and right sides.

4. A central nanofiltration water purification system according to claim 1, characterized in that: The nanofiltration filter element (8) is provided with a nanofiltration inlet (6), a nanofiltration clean water outlet (7) and a nanofiltration flushing outlet (5); the nanofiltration flushing outlet (5) and the nanofiltration inlet (6) are respectively located at the upper and lower ends of the nanofiltration filter element (8), the nanofiltration flushing outlet (5) is located on the side of the nanofiltration filter element (8), and the flushing solenoid valve (9) is connected to the nanofiltration flushing outlet (5).

5. A central nanofiltration water purification system according to claim 1, characterized in that: The pre-filter (3), pressure stabilizing pump (4), and two parallel nanofiltration cartridges (8) are connected by PE pipes or by an integrated water circuit board to form a purified water circuit (11).

6. A central nanofiltration water purification system according to claim 1, characterized in that: The pre-filter (3), flushing solenoid valve one (10), two nanofiltration filter elements (8), and flushing solenoid valve two (9) are connected by PE pipes or by an integrated water circuit board to form a flushing water circuit (12).

7. A central nanofiltration water purification system according to claim 1, characterized in that: The flushing solenoid valve one (10) and flushing solenoid valve two (9) are equipped with a timed opening function.

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