A flush system for water return

Abstract

The utility model discloses a kind of flushing systems of water preparation backflow, for the efficient cleaning of reverse osmosis filter element, including PCB composite filter element, first water inlet solenoid valve, booster pump, reverse osmosis membrane filter element, high voltage switch and pressure bucket, high voltage switch is connected to the inlet of PCB composite filter element by pipeline, a four-way valve is connected on pipeline between reverse osmosis membrane filter element and high voltage switch, pressure bucket is connected on four-way valve;Four-way valve and the booster pump inlet between still bypass connection have a bypass pipeline for pressure bucket storage pure water after pressurization by booster pump, reverse flushing reverse osmosis filter element;Pressure bucket storage pure water enters booster pump after pressurization by bypass pipeline, reverse flushing reverse osmosis filter element, realize to clean pressure and cleaning flow effective control, can improve reverse osmosis filter element cleaning efficiency.

Description

[Technical Field]

[0001] This utility model relates to water purification technology, and more particularly to a flushing system for water purification and recirculation. [Background Technology]

[0002] With the improvement of living standards, purified water provided by water purification systems is frequently used in daily production and life. The production of purified water inevitably requires corresponding reverse osmosis filter cartridges. However, during long-term use, reverse osmosis membranes may experience problems such as fouling and scaling due to various reasons, leading to a decline in membrane performance. To ensure the efficient and stable operation of the reverse osmosis system, membrane cleaning is necessary.

[0003] Reverse osmosis membrane cleaning methods include chemical cleaning, physical cleaning, and biological cleaning. After cleaning, the reverse osmosis membrane needs to be rinsed to remove residues and debris from the cleaning solution. Controlling the rinsing pressure is crucial; excessively high or low pressure can negatively impact membrane stability. Generally, the rinsing pressure after reverse osmosis membrane cleaning is 0.2-0.4 MPa. Low-pressure water is used to rinse the reverse osmosis membrane, removing loose impurities and some water-soluble contaminants from the membrane surface. Alternatively, a high-flow-rate rinse can be used, increasing the rinsing water flow rate to 1.5-2 times the normal operating flow rate to more effectively remove contaminants from the membrane surface. Ultimately, the actual pressure and rinsing flow rate depend on the specific cleaning conditions and the type of membrane.

[0004] However, current cleaning methods involve directly supplying water to the reverse osmosis filter cartridge through a pressure tank. Since the pressure inside the pressure tank varies with the amount of water, it cannot effectively guarantee efficient and reliable cleaning of the reverse osmosis filter cartridge, nor can it effectively control the cleaning pressure and flow rate according to the specific cleaning situation and the type of membrane. [Utility Model Content]

[0005] This invention provides a water recirculation flushing system that is simple in structure, easy to control, and effectively controls the cleaning pressure and flow rate, thereby improving the cleaning efficiency of reverse osmosis filter cartridges.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A water recirculation flushing system for efficient cleaning of reverse osmosis filter cartridges includes a PCB composite filter cartridge, a first inlet solenoid valve, a booster pump, a reverse osmosis membrane filter cartridge, a high-pressure switch, and a pressure tank. External tap water enters the PCB composite filter cartridge. The PCB composite filter cartridge, the first inlet solenoid valve, the booster pump, the reverse osmosis membrane filter cartridge, and the high-pressure switch are connected in series via pipelines.

[0008] The high-voltage switch is connected to the inlet of the PCB composite filter element through a pipeline. The pure water filtered by the PCB composite filter element is connected to a pure water three-way interface and a pure water two-way interface through pipelines. The pure water two-way interface is connected to the first water inlet solenoid valve through a three-way interface.

[0009] The reverse osmosis membrane filter element is connected to a concentrated water two-way interface that allows wastewater to be discharged directly through a wastewater solenoid valve.

[0010] A four-way valve is connected in the pipeline between the reverse osmosis membrane filter element and the high-pressure switch. The pressure tank is connected to the four-way valve. A first one-way valve to prevent water backflow is provided between the four-way valve and the reverse osmosis membrane filter element.

[0011] A bypass pipeline is also connected between the four-way valve and the inlet of the booster pump for backwashing the reverse osmosis filter element after the purified water stored in the pressure tank is pressurized by the booster pump.

[0012] Preferably, a second inlet solenoid valve and a second check valve for controlling the on / off state of the bypass pipeline are installed on the bypass pipeline.

[0013] Preferably, the outlet of the first inlet solenoid valve is also connected to a raw water TDS probe.

[0014] Preferably, a pure water TDS probe is also connected between the high-voltage switch and the PCB composite filter element.

[0015] The beneficial effects of this utility model are:

[0016] In this invention, a four-way valve is connected to the pipeline between the reverse osmosis membrane filter element and the high-pressure switch. A pressure tank is connected to the four-way valve, and a first one-way valve is provided between the four-way valve and the reverse osmosis membrane filter element to prevent water backflow. A bypass pipeline is also connected between the four-way valve and the inlet of the booster pump for backwashing the reverse osmosis filter element after the purified water stored in the pressure tank is pressurized by the booster pump. The purified water stored in the pressure tank enters the booster pump through the bypass pipeline, is pressurized, and then backwashes the reverse osmosis filter element, thereby achieving effective control of cleaning pressure and cleaning flow rate and effectively improving the cleaning efficiency of the reverse osmosis filter element.

[0017] This method utilizes pure water from a pressure tank, pressurizes it with a booster pump, and circulates it to produce water. The concentrated water with high TDS concentration in the reverse osmosis filter cartridge is discharged through the concentrated water two-way interface, which can effectively flush the reverse osmosis membrane filter cartridge, greatly reduce the TDS concentration inside the reverse osmosis membrane filter cartridge, and solve the problem of excessively high TDS concentration in the first water used by existing users. [Attached Image Description]

[0018] Figure 1 This is a schematic diagram of the system principle of this utility model;

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

Detailed Implementation Methods

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0021] A flushing system with water recirculation, such as Figure 1 As shown, the high-efficiency cleaning system for reverse osmosis filter cartridges includes a PCB composite filter cartridge 1, a first inlet solenoid valve 2, a booster pump 3, a reverse osmosis membrane filter cartridge 4, a high-pressure switch 5, and a pressure tank 6. External tap water enters the PCB composite filter cartridge 1. The PCB composite filter cartridge 1, the first inlet solenoid valve 2, the booster pump 3, the reverse osmosis membrane filter cartridge 4, and the high-pressure switch 5 are connected in series via pipelines. The high-pressure switch 5 is connected to the inlet of the PCB composite filter cartridge 1 via a pipeline. The pure water filtered by the PCB composite filter cartridge 1 is connected to a pure water three-way interface and a pure water two-way interface via pipelines. The pure water two-way interface is connected to the first inlet solenoid valve 2 via a three-way interface 7. The reverse osmosis membrane filter cartridge 4 is connected to a concentrated water two-way interface for direct wastewater discharge via a wastewater solenoid valve 8. The outlet of the first inlet solenoid valve 2 is also connected to a raw water TDS probe 9. A pure water TDS probe 10 is also connected between the high-pressure switch 5 and the PCB composite filter cartridge 1.

[0022] Continue as Figure 1 As shown, a four-way valve 11 is connected to the pipeline between the reverse osmosis membrane filter element 4 and the high-pressure switch 5. The pressure tank 6 is connected to the four-way valve 11. A first one-way valve 12 is provided between the four-way valve 11 and the reverse osmosis membrane filter element 4 to prevent water backflow. A bypass pipeline 13 is also connected between the four-way valve 11 and the inlet of the booster pump 3. The bypass pipeline 13 is used to backwash the reverse osmosis filter element after the purified water stored in the pressure tank 6 is pressurized by the booster pump 3. A second inlet solenoid valve 14 and a second one-way valve 15 are installed on the bypass pipeline 13 to control the opening and closing of the pipeline.

[0023] In this embodiment, the pure water in the pressure tank 6 is pressurized by the booster pump 3 and circulated to produce water. The concentrated water with high TDS concentration in the reverse osmosis filter element is discharged through the concentrated water two-way interface, which can effectively flush the reverse osmosis membrane filter element 4, realize effective control of cleaning pressure and cleaning flow, greatly reduce the TDS concentration in the reverse osmosis membrane filter element 4, and solve the problem of excessively high TDS concentration in the first water used by existing users.

[0024] The above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Any obvious changes made to the shape, structure and principle of this utility model, as well as any other modifications that do not depart from the essence of this utility model, should be covered within the protection scope of this utility model.

Claims

1. A water recirculation flushing system for efficient cleaning of reverse osmosis filter cartridges, characterized in that, It includes a PCB composite filter element, a first inlet solenoid valve, a booster pump, a reverse osmosis membrane filter element, a high-pressure switch, and a pressure tank. External tap water enters the PCB composite filter element. The PCB composite filter element, the first inlet solenoid valve, the booster pump, the reverse osmosis membrane filter element, and the high-pressure switch are connected in series through pipelines. The high-voltage switch is connected to the inlet of the PCB composite filter element through a pipeline. The pure water filtered by the PCB composite filter element is connected to a pure water three-way interface and a pure water two-way interface through pipelines. The pure water two-way interface is connected to the first water inlet solenoid valve through a three-way interface. The reverse osmosis membrane filter element is connected to a concentrated water two-way interface that allows wastewater to be discharged directly through a wastewater solenoid valve. A four-way valve is connected in the pipeline between the reverse osmosis membrane filter element and the high-pressure switch. The pressure tank is connected to the four-way valve. A first one-way valve to prevent water backflow is provided between the four-way valve and the reverse osmosis membrane filter element. A bypass pipeline is also connected between the four-way valve and the inlet of the booster pump for backwashing the reverse osmosis filter element after the purified water stored in the pressure tank is pressurized by the booster pump.

2. A backwash system for a water treatment system as defined in claim 1, wherein The bypass pipeline is equipped with a second inlet solenoid valve and a second check valve to control the flow of water.

3. A backwash system for a water treatment system as defined in claim 1, wherein The outlet of the first inlet solenoid valve is also connected to a raw water TDS probe.

4. The flushing system with water recirculation according to claim 1, characterized in that, A pure water TDS probe is also connected between the high-voltage switch and the PCB composite filter element.

Images