Cleaning method and cleaning system of tubular membrane

Abstract

The invention discloses a cleaning method and a cleaning system of a tubular membrane, and provides a cleaning method and a cleaning system which can recover the membrane flux. The cleaning method comprises the following steps of: cleaning with clean water; cleaning through mixing particles, clean water and air: after mixing particles, clean water and air, and cleaning the mixture of particles, clean water and air in the tubular membrane, wherein air bubbles are broken caused by the collision of air bubbles and particles, energy is released extensively to cause partial vibration, and meanwhile, the particles and air bubbles are both rubbed with the membrane so as to lead to falling of pollutants on the surface of the membrane; and discharging the pollutants to complete the cleaning process. According to the cleaning method disclosed by the invention, the step of cleaning by mixing particles, clean water and gases is added; the air bubbles generated by the gases can be collided with the particles, and energy is released extensively so as to lead to partial vibration; turbulence is formed in a membrane component; particles flow rapidly in a system; and the air bubbles and particles are both rubbed with the surface of the membrane so as to remove surface pollutants. The cleaning effect and the cleaning efficiency can be improved greatly by combining with two aspects.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a cleaning method and a cleaning system for a tubular membrane. Background technique [0002] With the strengthening of environmental awareness, membrane separation technology has been widely used in food, medicine, chemical and other industries. [0003] When the particles trapped and deposited on the membrane accumulate to a certain extent, they will block the membrane pore size, cause membrane fouling, affect the membrane flux, and thus affect the separation effect of the membrane. In order to restore the membrane permeation and separation effect, the membrane module needs to be cleaned. The current cleaning methods include physical cleaning and chemical cleaning. Physical cleaning generally adopts water backwashing or gas scrubbing, and there is also a combination of the two, but it can only temporarily restore the separation effect of the membrane. The patent publi...

AI Technical Summary

Problems solved by technology

The patent publication number is CN1533827A, and the name of the invention is "A System and Cleaning Method Using Soft Spherical Particles for Membrane Cleaning" discloses a physical cleaning method, the particle diameter used in this method is large, and the particles are intermittent The number of particles in the cleaning system is greatly affected by the water flow through the tubular membrane module, and the control of the particle concentration in the cleaning system is lost

According to the position of the interception net in the figure of the patent device, the particles cannot be recovered effectively after cleaning

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