CN203090761U - Water-saving reverse osmosis system - Google Patents

Abstract

The utility model relates to a water-saving reverse osmosis system which comprises a reverse osmosis device, a pure water tank and a secondary pure water tank, wherein a water delivery pipe is arranged at a water outlet of the reverse osmosis device, and is connected with the pure water tank and the secondary pure water tank; a flow direction change-over valve is arranged on the water delivery pipe, and selects the fluid flow direction according to fluid conductance in the water delivery pipe; and a washing circuit for cleaning the reverse osmosis device is arranged between the secondary pure water tank and a water inlet of the reverse osmosis device. The flow direction change-over valve can control water in a valve body to flow to the pure water tank or the secondary pure water tank according to the conductance of a water body in the water delivery pipe; when the reverse osmosis device is out of operation, the collected secondary pure water can be used for washing the reverse osmosis device; concentrated water can be prevented from remaining in the reverse osmosis device; a protective effect is exerted on the reverse osmosis device; and the secondary pure water is used for washing, so that large amount of pure water for washing is not required, and large number of water resources are saved.

Description

A water-saving reverse osmosis system

technical field

The utility model relates to a reverse osmosis system.

Background technique

Reverse osmosis technology is currently a relatively widespread pure water preparation technology. Its principle is to separate impurities and water through a semi-permeable membrane under the action of higher than the osmotic pressure of the solution. Reverse osmosis technology can effectively remove dissolved salts in water. species, colloids, microorganisms, organic matter, etc.

After the operation of the reverse osmosis device, due to the presence of concentrated water in the system, it is easy to cause fouling and corrosion of the reverse osmosis membrane, so it is necessary to flush the reverse osmosis device with low pressure and discharge the rinsed water; traditional reverse osmosis equipment uses pure water in the pure water tank As low-pressure flushing water, the cost and energy consumption are increased, and a large amount of pure water resources are wasted; the water quality of the produced water does not meet the pure water standard in the initial stage of reverse osmosis system operation or in other cases, but this part of the water has been treated by reverse osmosis, The organic matter and salinity in the water are greatly reduced, and the water quality is clear. Such water is called sub-pure water. According to the traditional method, it will be discharged directly, which is a waste of water resources.

Utility model content

The technical problem solved by the utility model is to provide a water-saving reverse osmosis system which uses subpure water to flush the reverse osmosis device.

The utility model adopts the following technical solutions to solve the technical problems: a water-saving reverse osmosis system, including a reverse osmosis device, a pure water tank and a sub-pure water tank, the water outlet of the reverse osmosis device is provided with a water delivery pipe, the The water delivery pipe connects the pure water tank and the subpure water tank, and a flow direction switching valve is provided on the water delivery pipe, and the flow direction switching valve selects the fluid flow direction according to the fluid conductance in the water delivery pipe, and the subpure water tank and reverse osmosis A flushing circuit for cleaning the reverse osmosis device is provided between the water inlets of the device.

A further technical solution is: the flow direction switching valve includes a three-way valve and a PLC controller, and the water delivery pipe is respectively connected to the water outlet of the reverse osmosis device, the pure water tank and the subpure water through the three-way valve. box.

A further technical solution is: a flushing pump is provided on the flushing circuit.

A further technical solution is: an electric valve is provided on the flushing circuit.

The beneficial effects of the utility model are: the flow direction switching valve can control the water in the valve body to flow to the pure water tank or the subpure water tank according to the conductance of the water body in the water delivery pipe, and when the reverse osmosis device is out of service, the collected subpure water can be used , to flush the reverse osmosis device; on the one hand, it avoids concentrated water remaining in the reverse osmosis device, and most of the organic matter and salt in the subpure water have been removed, and the water quality is better, which protects the reverse osmosis device and prolongs the service life of the reverse osmosis device. The service life of the reverse osmosis device; on the other hand, flushing with subpure water does not need to consume a large amount of pure water for flushing, which not only makes full use of subpure water, but also reduces the consumption of pure water and saves a lot of water resources.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail:

Fig. 1 is a schematic diagram of the utility model.

Detailed ways

With reference to Fig. 1, a kind of water-saving reverse osmosis system of the utility model shown, comprises reverse osmosis device 1, pure water tank 2 and second pure water tank 3, is connected with water delivery pipe 41 on the water outlet of described reverse osmosis device 1 , the pure water tank 2 and the sub-pure water tank 3 are sequentially connected along the water delivery direction of the water delivery pipe 41, and a flow direction switching valve 42 is provided at the junction of the water delivery pipe 41 and the pure water tank 2, and the flow direction switching valve 42 can control the flow of fluid to the pure water tank 2 or sub-pure water tank 3 according to the conductance of the fluid in the water delivery pipe 41, and a flushing circuit 51 for cleaning the reverse osmosis device is provided between the sub-pure water tank 3 and the water inlet of the reverse osmosis device 1 .

Preferably, the flow direction switching valve 42 includes a three-way valve and a PLC controller, and the water delivery pipe 41 is respectively connected to the water outlet of the reverse osmosis device 1, the pure water tank 2 and Subpure water tank 3, the PLC controller is provided with a display screen showing the conductance value; the PLC controller detects whether the conductance of the fluid meets the pure water standard, and automatically controls the flow direction of the fluid in the three-way valve; when the water quality does not reach the pure water When standard, the fluid in the three-way valve flows to the sub-pure water tank; when the water quality reaches the pure water standard, the fluid in the three-way valve flows to the pure water tank.

Flushing the reverse osmosis device 1 requires sufficient water pressure. In order to provide power to the water in the flushing circuit 51 , a pressurized flushing pump 52 is provided on the flushing circuit.

The flushing circuit 51 is also provided with an electric valve 53. When the electric valve 53 is opened, the water in the flushing circuit flows to the reverse osmosis device 1, and when the electric valve 53 is closed, the flushing of the reverse osmosis device is stopped.

When the water-saving reverse osmosis system is working: in the early stage of reverse osmosis system operation or other circumstances, the water quality of the reverse osmosis product cannot reach the pure water standard and forms sub-pure water, which is automatically controlled by the PLC controller to convert this part The pure water flows to the subpure water tank through the three-way valve; when the water quality reaches the pure water standard, the pure water enters the pure water tank through the three-way valve; Flush the reverse osmosis unit and squeeze out the concentrated water in the reverse osmosis unit.

Those skilled in the art can make various changes and deformations to the utility model after they are familiar with the principle of the utility model, as long as they do not depart from the spirit of the utility model, all should belong to the scope defined by the appended claims of the utility model.

Claims (4)

1. A water-saving reverse osmosis system, comprising a reverse osmosis device, a pure water tank and a secondary pure water tank, the water outlet of the reverse osmosis device is provided with a water delivery pipe, and the water delivery pipe connects the pure water tank and the secondary pure water tank The pure water tank is characterized in that: the water delivery pipe is provided with a flow direction switching valve, and the flow direction switching valve selects the flow direction of the fluid according to the fluid conductance in the water delivery pipe, between the secondary pure water tank and the water inlet of the reverse osmosis device There is a flushing circuit for cleaning the reverse osmosis device. 2. A water-saving reverse osmosis system according to claim 1, characterized in that: the flow direction switching valve includes a three-way valve and a PLC controller, and the water delivery pipe is respectively connected to the three-way valve through the three-way valve. The water outlet of the reverse osmosis device, the pure water tank and the subpure water tank. 3. A water-saving reverse osmosis system according to claim 1, characterized in that: said flushing circuit is provided with a flushing pump. 4. A water-saving reverse osmosis system according to claim 1, characterized in that: said flushing circuit is provided with an electric valve.

Images