Intensifying reverse osmosis off-line cleaning testing method

Abstract

The invention discloses an intensifying reverse osmosis off-line cleaning testing method. Equipment comprises a cleaning water tank, a cleaning pump, a water inlet filter, a testing water tank, a testing pump, a dense water pipe filter, a membrane frame, a pressure container, a pipeline connected with the above devices, a valve and an instrument; an ejecting aerator is arranged on the cleaning water tank to intensify foam generation; the pressure container is aslant installed, which is beneficial for draining of water in a membrane and drying of the membrane to change the surface state of themembrane. According to the testing method, the cleaning effect is good, and the reverse osmosis standardization flow recovery rate can exceed 90%; cleaning agentia and a cleaning method are optimized,the ejecting aerator in the testing water tank generates foams, and air water is cleaned intensively; through drying and re-cleaning after membrane cleaning, the contact conditions of the membrane surface and pollutants are changed, and intensified cleaning is achieved; according to pollution features of a membrane element, cleaning is targetedly carried out, and the cleaning effect is intensified; device integration testing and cleaning function are achieved; the testing method has extensive adaptability and is widely applicable to various reverse osmosis membrane cleaning.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an off-line cleaning test method for enhanced reverse osmosis. Background technique [0002] The ultrafiltration-reverse osmosis double-membrane process is the mainstream desalination process today, and is widely used in seawater desalination, desalination of circulating cooling water, refined treatment and reuse of sewage after advanced treatment, etc. Long-term operation of the reverse osmosis system, only online cleaning can no longer meet the operational requirements, the transmembrane pressure gradually increases, the water production rate gradually decreases, and even the desalination rate decreases, which seriously affects the system performance and requires regular offline cleaning. [0003] For the traditional off-line cleaning of reverse osmosis membrane, more attention is paid to the type and concentration of the agent, and less exploration is made ...

AI Technical Summary

Problems solved by technology

For example, CN201621043872.7 only has a cleaning function, so it cannot be tested and the cleaning effect cannot be evaluated

For example, although CN201620903391.2 has the function of off-line cleaning and testing, the membrane cleaning can only be carried out in one direction, and when the membrane is fouled, the effect of alternating positive and negative cleaning is better, and the system does not have related functions

For example, CN201210270583.0 considers the ultrasonic cleaning method on the basis of the medicament, but it has high requirements for the equipment, and the cleaning process needs to repeatedly dismantle the membrane, and the amount of manual operation is relatively large

Such as CN201310250776.4, such as CN201210005663.3, both are traditional cleaning methods, only improved in terms of medicaments, but the reverse osmosis system has great differences in pollution due to the large difference in influent water quality, and it is difficult to adjust through simple medicaments achieve better cleaning

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