A water purification system and method with concentrated water production and backwashing functions

Abstract

The invention provides a water purification system with concentrated water making and backwashing functions and a water purification method. The water purification system with the concentrated water making and backwashing functions comprises a raw water inlet pipe, a water pump, an RO membrane filter element, a concentrated water storage barrel, a purified water pressure barrel and a loop portion, wherein a concentrated water outlet and a purified water outlet of the RO membrane filter element are communicated with the concentrated water storage barrel and the purified water pressure barrel respectively; a water outlet of the purified water pressure barrel is connected with a water taking unit through an active carbon filter element. The water purification system with the concentrated water making and backwashing functions is characterized in that a concentrated water making loop is arranged; the concentrated water making loop is composed of a concentrated water making pipeline, one end of the concentrated water making pipeline stretches into the bottom of the concentrated water storage barrel, and the other end of the concentrated water making pipeline is communicated with a water inlet of the water pump; an electric control valve k14 is arranged on the concentrated water making pipeline. Through the water purification system, a concentrated water remaking loop is utilized for remaking concentrated water, so that waste of water resources is avoided; filter element backwashing loops L1, L2 and L3, an RO filter element forward washing loop, an RO filter element backwashing loop and an RO filter membrane backwashing loop are arranged, so that the filtering function is guaranteed, the service life is prolonged, beneficial effects are remarkable, and application and popularization are facilitated.

Description

technical field [0001] The present invention relates to a water purification system and method with concentrated water production and backwashing functions, more specifically, to a water purification system with concentrated water production and backwashing functions applied to water purification equipment and methods. Background technique [0002] At present, the known RO water purifier is composed of main components such as a low-pressure switch, a water pump, a water inlet solenoid valve, a high-pressure switch, a flushing solenoid valve, a check valve, a waste water proportional device, and a five-stage filter core. The water quality produced by this kind of machine is excellent, but most of them produce "waste water" (the correct term should be called concentrated water) with a ratio of pure water to waste water of 1:3 or higher during water production, resulting in a lot of waste of water resources. Due to the structure and operation mode, if the pure water produced b...

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Problems solved by technology

The water quality produced by this kind of machine is excellent, but most of them produce "wastewater" (the correct term should be called concentrated water) with a ratio of pure water and wastewater of 1:3 or higher when producing water, resulting in a lot of waste of water resources.

Due to the structure and operation mode, if the pure water produced by the water purifier itself is filtered again, it will also produce "waste water" of 1:3 or higher. This structure and operation mode are very unreasonable. sex

Also due to the structure and operation mode, the filter element needs to be replaced in about three months, resulting in high maintenance costs

There are also manufacturers who use the air bag contraction and release method to backwash the filter element, but because the pressure stored in the air bag is insufficient and uneven, the flushing effect on the filter element is not good

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