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Cleaning method and cleaning system of tubular membrane

A cleaning system and tubular membrane technology, applied in the field of water treatment, can solve the problems of failure to achieve recovery of particles after cleaning, loss of particle concentration control, etc., and achieve the effect of maintaining uniform stability, simple structure and improving cleaning effect.

Inactive Publication Date: 2013-10-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Cleaning method and cleaning system of tubular membrane

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Embodiment 1

[0046] Embodiment 1: the steps of using the cleaning system of the present invention to clean are as follows:

[0047] 1. Measure the membrane flux before cleaning: open the water inlet valve 8, the clean water inlet control valve 9, the particle circulation control valve 16 and the backflow control valve 17, and close other valves. Clean water enters the flow meter 2 from the circulation tank 19 through the circulation pump 1 and the valve 8, controls the flow rate at the outlet of the water inlet valve 8, controls the reading of the second pressure gauge 18 through the backflow control valve 17, and measures the flux under the corresponding pressure size. When the flux reaches the condition that needs to be cleaned, the cleaning of the membrane module is carried out.

[0048] 2. Cleaning with clean water: open the water inlet valve 8, the clean water inlet control valve 9, the particle circulation control valve 16 and the backflow control valve 17, and all other valves are ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02
Inventor 范云双刘恩华刘金同
Owner TIANJIN POLYTECHNIC UNIV
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