A Method and Experimental Device for Mitigation of Membrane Fouling by Alternating Non-uniform Electric Field

Abstract

The invention discloses a method and testing device for reducing membrane pollution through an alternate inhomogeneous field. A lower filter cavity and an upper filter cavity are vertically symmetric about a flat plate micro-filtration membrane as a symmetric center, a needle point electrode device is arranged in the upper filter cavity, and a plate electrode is arranged in the lower filter cavity. The needle point electrode device is provided with array type needle point electrodes which are arranged in m rows from left to right and arranged in n lines from front to back, each needle point electrode is connected with a conductor wire, m conductor wires in each line of needle point electrodes pass through hollow pipes to be connected with a wire diverter, and the n wire diverters are connected to a MCU control box. A membrane hole is scoured by different angles through the alternately-changing field, foreign particles are made to move between the surface of the membrane and the electrodes, and the situation that the foreign particles are centralized on the surfaces of the electrodes or the surface of the membrane to cause pollution to the surfaces of the electrodes or the surface of the membrane can be avoided.

Description

technical field [0001] The invention relates to membrane fouling mitigation and concentration polarization technology, which uses alternating non-uniform electric field to alleviate the pollution occurring in the operation process of the device. Background technique [0002] Membrane is a material with selective separation function. The selective separation of membrane can realize the separation, purification and concentration of different components in the feed liquid. It has high efficiency, energy saving, environmental protection, molecular level filtration and the filtration process is simple and easy to control. And other characteristics, so it is widely used in food, medicine, biology, environmental protection, chemical industry, energy, water treatment, bionics and other fields, and has become one of the most important means in separation science. However, the wide application of membrane separation technology is accompanied by membrane fouling. Membrane fouling is ca...

AI Technical Summary

Problems solved by technology

However, the upper and lower conductive plates of the device are fixed, and the distance from the flat film cannot be adjusted in real time according to specific conditions; secondly, the size and frequency of the high-voltage pulse are not adjustable, and cannot be adjusted on site; thirdly, the patent uses a uniform electric field, which It is a relatively common method, but it does not have the advantage of non-uniform electric field that can change the force direction of impurity particles

According to the above general description, the device is not perfect in some aspects and is inconvenient to use

Images