Cleaning system and cleaning method of tubular ultrafiltration membrane assembly

Abstract

The invention discloses a cleaning system and a cleaning method of a tubular ultrafiltration membrane assembly. The cleaning system comprises an ultrafiltration cleaning box, wherein a cleaning liquid level meter and an electric heating rod are arranged on the ultrafiltration cleaning box; the bottom part of the ultrafiltration cleaning box is connected with a cleaning water inlet tube; a water inlet pump and a circulating pump are arranged on the cleaning water inlet tube; after water flows out of the circulating pump, the water flows into the water inlet end of the tubular ultrafiltration membrane assembly; the clean liquid side of the tubular ultrafiltration membrane assembly is connected with a cleaning circulating tube, and the other end of the cleaning circulating tube is connected with the ultrafiltration cleaning box; the concentrated water side of the tubular ultrafiltration membrane assembly is connected with a concentrated water cleaning tube and a concentrated water reflux tube, the other end of the concentrated water cleaning tube is connected with the ultrafiltration cleaning box, and the other end of the concentrated water reflux tube is connected with the water inlet end of the circulating pump; the cleaning system also comprises a cleaning control unit, a running water valve, the cleaning liquid level meter, the electric heating rod, the water inlet pump, a cleaning water inlet valve, the circulating pump, a clean liquid cleaning valve, a concentrated water cleaning valve and a concentrated water reflux valve which are respectively and electrically connected with a process controller in the cleaning control unit. The cleaning system has the advantages that the cleaning is timely, cleaning parameters are properly controlled, and the easiness in damage to the membrane assembly is avoided.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a cleaning system and a cleaning method of a tubular ultrafiltration membrane module. Background technique [0002] Membrane separation technology refers to the method of separating, purifying and concentrating multi-component systems with natural or synthetic materials as the medium and under the action of external driving force (energy, pressure difference, etc.). Compared with traditional methods, it has the advantages of high efficiency, low energy consumption, simple process, small footprint, and no secondary pollution. It is widely used in petrochemical, seawater desalination, food processing, and municipal sewage treatment. The huge challenge facing membrane separation technology is the problem of membrane fouling. During the separation process, dissolved macromolecules or suspended particles in the liquid to be treated will deposit on the membrane pore...

AI Technical Summary

Problems solved by technology

The huge challenge facing membrane separation technology is the problem of membrane fouling. During the separation process, dissolved macromolecules or suspended particles in the liquid to be treated will deposit on the membrane pore wall and membrane surface, block the membrane pores, reduce the membrane flux, and shorten the membrane life. service life, increased energy consumption and operating costs

[0003] Membrane cleaning is an effective way to reduce membrane fouling. Existing tubular membrane treatment systems are equipped with cleaning systems. However, due to the differences in the professional skills and sense of responsibility of each operator, there are often times when the membrane treatment system is not cleaned when it should be cleaned. Or the parameters are not properly controlled during cleaning. In the long run, the membrane flux will be reduced, and in severe cases, it will cause irreversible damage to the membrane components and shorten the service life of the membrane.

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