Offline cleaning and evaluating device of reverse osmosis membrane element and application method of device

Abstract

The invention discloses an offline cleaning and evaluating device of a reverse osmosis membrane element and an application method of the device, belonging to the technical field of water treatment. The method can be used for evaluating the performance of the reverse osmosis membrane element, typically selecting cleaning agents according to the pollutant ingredients and contents and cleaning a single reverse osmosis membrane element in off-line multi-angle and multilevel manner by means of such operations as washing by a large amount of water, reverse washing, positive washing and soaking, and in the cleaning process, the method can be used for monitoring the performance of the reverse osmosis membrane element and controlling such factors as cleaning flow rate, pressure, cleaning time and temperature, so as to improve a cleaning effect. The offline cleaning and evaluating device disclosed by the invention can be also used for evaluating and testing the performance of the agents and the reverse osmosis membrane by simulating the onsite operation conditions.

Description

technical field [0001] The invention relates to an off-line cleaning and evaluation device for a reverse osmosis membrane element and a use method thereof, belonging to the field of water treatment. Background technique [0002] Reverse osmosis technology began to be studied in the 1950s. By the end of the 1960s, reverse osmosis membranes with industrial value were produced. In 1971, industrial reverse osmosis devices were put into operation in power plants. Now reverse osmosis is used for water treatment throughout the United States and Japan. , France, Italy and other countries. my country began to introduce reverse osmosis devices in the water treatment of power plants in the late 1970s. In the 1990s, the development of reverse osmosis membranes became a hot spot. Now reverse osmosis technology is mainly used in seawater desalination, pure water and ultrapure water preparation, urban water supply treatment, Urban sewage treatment, steel industry wastewater treatment, chem...

AI Technical Summary

Problems solved by technology

However, with the extension of the operation cycle, the decline of membrane performance, the formation and aggravation of complex pollution, conventional online cleaning can no longer recover, and the pollution degree of each membrane element of a single set of reverse osmosis is different. With conventional online cleaning, due to the cleaning method and flow rate , Insufficient strength of the agent and uneven distribution of cleaning, it has been impossible to completely remove such serious compound pollution, resulting in a significant decline in the performance of the reverse osmosis membrane

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