Cleaning method of filter membrane

A technology of filtering membrane and backwashing, which is applied in the field of membrane cleaning, can solve the problem of difficult to meet the requirements of controlling membrane pollution, and achieve the effect of effective cleaning method, reducing chemical pollution and reducing cost.

Active Publication Date: 2020-04-21
SAE TECH DELEVOPMENT DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phenomenon directly shows that it is difficult to meet the requirements of controlling membrane fouling by using the existing backwashing method.

Method used

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  • Cleaning method of filter membrane

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] see figure 1 , is a schematic flowchart of a cleaning method for a filter membrane provided in an embodiment of the present invention. Such as figure 1 As shown, the method includes the steps of:

[0022] S101. Provide a reverse water pump, turn on the reverse water pump and close the working valve, make the water flow direction of the reverse water pump opposite to the water flow direction of the working valve, and backwash the filter membrane for 30 minu...

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Abstract

The invention discloses a cleaning method for a filtering film. The method comprises the steps that firstly, a reverse water pump is provided and back washing is conducted on the filtering film; secondly, the filtering film is flushed with chlorine water with the chlorine concentration ranging from 5 mg / L to 15 mg / L; thirdly, the flushed filtering film is taken out and drained off and is placed in a drying box with the temperature of 120 DEG C to be dried; fourthly, the filtering film is placed in a crucible furnace, and heating is conducted for 2-3 min at the temperature of 500 DEG C; fifthly, an air gun is used for blowing the filtering film; sixthly, the filtering film is placed in a sodium hydroxide solution to be immersed for 24 h; seventhly, the filtering film is taken out, and after being cleaned through clean water, the filtering film is placed in sodium hypochlorite with the concentration being 1.5% to be immersed for 1 h; eighthly, after being cleaned through saline water, the filtering film is placed in the drying box to be dried for one hour; ninthly, the filtering film is placed in a non-oxidative sterilizing agent solution to be immersed; and tenthly, the filtering film is taken out and placed in the drying box with the temperature of 120 DEG C to be dried for 3 hours.

Description

technical field [0001] The invention relates to the field of membrane cleaning, in particular to a cleaning method for a filter membrane. Background technique [0002] Membrane fouling will occur after the filter membrane has been in operation for a period of time. After membrane fouling occurs, chemical cleaning is generally used alone to eliminate membrane fouling. However, during chemical cleaning, high-concentration acids, alkalis or oxidants are generally used to soak or circulate the membrane. Due to the high concentration of chemical agents used, it will inevitably cause damage to the membrane and shorten the service life of the membrane, which hinders the application of membrane technology. Therefore, membrane fouling control is a crucial issue in the promotion and application of membrane technology. In another cleaning method, generally only the method of backwashing after the membrane has been running for a period of time is used alone. Membrane backwashing is g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/02
Inventor 何坤一
Owner SAE TECH DELEVOPMENT DONGGUAN
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