Operation method of externally pressurized hollow fiber membrane separator

Abstract

The first operation process in hollow fiber membrane separator system includes: work state; air and water double-washing state including introducing small amount of original liquid to wash the membrane in the right direction while introducing compressed air to wash the membrane in the right direction; and draining state. The second operation process includes: work state; air and water double-washing state including introducing small amount of original liquid to wash the membrane in the right direction while introducing compressed air to wash the membrane in the right direction; inverse washing state with inverse washing liquid; and draining state. The third operation process includes: work state; air and water double-washing state including introducing small amount of original liquid with chemical added to wash the membrane in the right direction while introducing compressed air to wash the membrane in the right direction; and draining state.

Description

technical field [0001] The invention relates to a membrane separation technology, in particular to an operation method of an external pressure hollow fiber membrane separation device. Background technique [0002] With the improvement of people's living standards, people's requirements for drinking water continue to increase, so-called pure water, space water or purified water has entered people's daily life. Moreover, production and industrial water, such as biochemical, pharmaceutical, food, seasoning and other fields, have higher and higher requirements for water purification. In recent years, people have developed microfiltration and ultrafiltration membrane technologies for water purification, which are meeting this need and have achieved good practical results. Among them, external pressure hollow fiber membranes are most widely used. This is because the external pressure hollow fiber membrane (hereinafter referred to as the membrane) has the largest filling area per...

AI Technical Summary

Problems solved by technology

But it still has shortcomings: the external pipeline design of the membrane module in the membrane device is not perfect

[0005] The disadvantages of the above cleaning are: there are many pipelines, and the operation is complicated

[0006] In addition, the original process is backwashing and dosing. Because the chemical itself is not clean, it pollutes the filtrate side of the membrane, thus affecting the quality of the produced water, and it is difficult to purify the chemical itself.

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