Chemical scrubbing method of the flat-plate film

Abstract

The present invention relates to a chemical washing technology for diaphragm, which is applicable to the washing process of plate diaphragm in plate diaphragm biologic reactor; the present invention can detect through the operation pressure in the running process of the plate diaphragm; when the pressure is more than certain degree, an automatic control system can adjust the aeration quantity of the plate diaphragm, meanwhile, a washing liquid is added into the plate diaphragm through a medicine adding system, after for a while, the washing liquid is discharged from the plate diaphragm, the described steps is repeated by once at least; the washing chemical agent added in the present invention can effectively wash the inside of the plate diaphragm, the control on the staying time can assure the medicine to penetrate from the inside to the outside of the diaphragm in order to wash a diaphragm hole and the outside of the diaphragm; a continuous aeration process can assure the air to flush on the external surface of the diaphragm to remove a pollutant outside the washed diaphragm in time, a repetitive washing process can avoid the incomplete washing effect from the first washing process, and improve the effectiveness of diaphragm washing; the invention has the advantages of an easy operation, a high automatic degree and so forth.

Description

technical field [0001] The invention relates to a membrane chemical cleaning technology, which is suitable for cleaning flat membranes in flat membrane bioreactors. Background technique [0002] Chemical cleaning of the membrane is inevitable. During the operation of the membrane bioreactor (MBR), the membrane as a physical filter medium will be continuously polluted by microorganisms and the like. At present, many scholars have researched and obtained many measures to prevent and control membrane fouling. Although these measures can prolong the operating time of the diaphragm to a certain extent, the diaphragm will eventually fail to operate normally due to fouling. Therefore, how to clean the polluted membrane to restore its filterability is an unavoidable problem in membrane bioreactor technology. [0003] Aiming at the cleaning of the membrane, the invention patent with the publication number CN98125099.8 provides a cleaning method for the hollow fiber membrane with ex...

AI Technical Summary

Problems solved by technology

[0004] The above methods all have a common disadvantage, that is, the use of compressed air and ultrasonic waves will increase the cleaning cost, which is uneconomical for users

And the above-mentioned methods are all inventions for the cleaning of hollow fiber membranes, but there is no research on the cleaning of flat membranes.

Since there are differences between flat-panel membrane modules and hollow-fiber membrane modules, such as different module structures and different operating conditions, it is not appropriate to apply hollow-fiber membrane cleaning methods to flat-panel membrane cleaning.

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