Energy-saving micro-concentrated-water reverse osmosis device and control method thereof

Abstract

The invention discloses an energy-saving micro-concentrated-water reverse osmosis device and a control method thereof. The energy-saving micro-concentrated-water reverse osmosis device comprises a water way device and a circuit device, wherein the water way device comprises a municipal tap water inlet, a first-stage filter element, a second-stage filter element, a third-stage filter element, a booster pump and a reverse osmosis membrane element which are connected sequentially through a pipeline; a pressure reducing valve is arranged on the pipeline between the municipal tap water inlet and the first-stage filter element; a water inlet control valve and a third tee joint are arranged sequentially on the pipeline between the third-stage filter element and the booster pump; water boosted by the booster pump passes the reverse osmosis membrane element and is divided into a purified water way and a concentrated water way. The energy-saving micro-concentrated-water reverse osmosis device solves the problems of backflow of concentrated water and limit of concentrated water emission, increases the water utilization rate and improves the usability of the reverse osmosis membrane element; the performance of the reverse osmosis membrane element is improved by means of a flushing mode, the service life is prolonged, the water saving effect is guaranteed, and a test proves that higher than 50% of the water utilization rate can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an energy-saving slightly concentrated water reverse osmosis device and a control method thereof. Background technique [0002] The reverse osmosis device pretreats the raw water through a multi-media filter, activated carbon filter, softening filter, etc., and then pressurizes it through a high-pressure pump. 1 / 300) of the reverse osmosis membrane (RO membrane), so that the higher concentration of water into low concentration water, while industrial pollutants, heavy metals, bacteria, viruses and other impurities mixed into the water are all isolated, so as to meet drinking regulations Physical and chemical indicators and hygiene standards. [0003] While the reverse osmosis water treatment device produces pure water, it also produces a part of concentrated water, and the amount of concentrated water is generally more than three times that of pure water. [0004] The p...

AI Technical Summary

Problems solved by technology

[0005] 1. Concentrated water reflux: The reflux of concentrated water enters the reverse osmosis membrane element again, causing the TDS value of the raw water entering the reverse osmosis membrane element to be too high, resulting in poor desalination rate

[0006] 2. Limit concentrated water discharge: limit concentrated water discharge, product performance is unstable, reverse osmosis membrane elements are not flushed enough, and fouling is prone to occur

Images