Hollow fiber membrane separator and its running process

Abstract

The invention relates to a separating system with hollow fiber membranes and an operating method. A dual backwash loop which is a pipeline connecting a top port of the said membrane assembly to a cleaning pump through a first branch and a second branch. The first branch is designed to fill a small amount of cleaning liquid into the said membrane assembly; and the second branch is designed to fill a relatively large amount of cleaning liquid in order to clean the membrane adequately. The said system operates in the following procedures: operation status, cleaning status 1, cleaning status 2, drain status, returning to the operation status. The technology of the present invention may be used to enhance the cleaning effect to the membrane system, further save water for the cleaning process, shorten the cleaning time, thus benefiting the continuous large scale industrial production and having higher efficiency.

Description

technical field

[0001] The invention relates to membrane separation technology, specifically an external pressure hollow fiber membrane separation device and its operating method. The international patent main classification number is intended to be Int.Cl 7 .BO1D 63 / 02, BO1D 65 / 02. Background technique

[0002] Water is the source of life. With the improvement of living standards, on the one hand, people's requirements for drinking water are constantly increasing, so-called pure water, space water or purified water has entered people's daily life. On the other hand, production and industrial water, such as biochemical, pharmaceutical, food, seasoning and other fields, have higher and higher requirements for water purity. In recent years, people have developed microfiltration and ultrafiltration membrane technology for water purification, which is meeting this need and has achieved good practical results. Among them, external pressure hollow fiber membranes are most widel...

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