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Cleaning method of flat plate ceramic membrane

A ceramic membrane and plate technology, applied in the field of membrane cleaning, can solve the problems of lack of specificity of cleaning agents, difficult to popularize and use, complicated cleaning steps, etc., to simplify cleaning steps and cleaning time, easy to popularize and apply, and simplify cleaning steps and time. Effect

Inactive Publication Date: 2018-12-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, these cleaning agents lack pertinence, and usually require multiple cleaning agents to be cleaned in multiple steps, and the cleaning steps are complicated; some cleaning agents also require heating conditions, which consume a lot of energy, and are not easy to promote and use

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS: The cleaning method of the flat ceramic membrane of the present invention will be further described in conjunction with examples below, but the present invention is not limited thereby.

[0022] The cleaning method of the present invention is carried out in a membrane filtration reactor, and the cleaning equipment used includes a cleaning pump and a membrane cleaning reactor.

[0023] The invention provides a method for cleaning flat ceramic membranes, the method comprising the following steps:

[0024] (1) Ultrapure water spray washing;

[0025] (2) Ultrapure water is backwashed at the first predetermined flow rate and the first predetermined time;

[0026] (3) Add the compound cleaning solution (sodium dodecylbenzene sulfonate + nonylphenol polyoxyethylene ether, disodium edetate + sodium dodecylbenzene sulfonate, ethylene diamine tetraacetate) at the second predetermined flow rate Disodium amine tetraacetate + nony...

example 1

[0041] Process conditions: polluted membrane: flat ceramic membrane to treat polluted membrane in municipal secondary effluent;

[0042] Cleaning method: liquid circulation + static soaking:

[0043] Cleaning temperature: room temperature:

[0044] Cleaning time: each step is different;

[0045] Preparation of cleaning solution: ultrapure water is used as solvent;

[0046] Sodium hypochlorite and disodium edetate compound cleaning solution: the mass concentration of sodium hypochlorite is 5‰, the concentration of disodium edetate is 10mmol / L, and the pH of the compound solution is adjusted to 12 with sodium hydroxide; Min flow rate cycle cleaning 40min;

[0047] Cleaning steps:

[0048] (1) Ultrapure water spray washing;

[0049] (2) Backwash with ultrapure water for 5 minutes at a flow rate of 2L / min;

[0050] (3) Add the compound cleaning solution of sodium hypochlorite and disodium ethylenediamine tetraacetate at a flow rate of 1L / min, and adjust the pH of the compoun...

example 2

[0054] Process conditions: polluted membrane: flat ceramic membrane to treat polluted membrane in municipal secondary effluent;

[0055] Cleaning method: liquid circulation + static soaking:

[0056] Cleaning temperature: room temperature:

[0057] Cleaning time: each step is different;

[0058] Preparation of cleaning solution: ultrapure water is used as solvent;

[0059]Compound cleaning solution of disodium edetate and nonylphenol polyoxyethylene ether: the concentration of disodium edetate is 10mmol / L, the concentration of nonylphenol polyoxyethylene ether is 4 times the micellar concentration, Adjust the pH of the compound solution to 12 with sodium hydroxide; circulate and wash at a flow rate of 1L / min for 40min;

[0060] Cleaning steps:

[0061] (1) Ultrapure water spray washing;

[0062] (2) Backwash with ultrapure water for 5 minutes at a flow rate of 2L / min;

[0063] (3) Add the compound cleaning solution of disodium ethylenediamine tetraacetate and nonylphenol...

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Abstract

The invention provides a cleaning method of a flat plate ceramic membrane. The method comprises the following cleaning steps of (1) physical cleaning: performing ultrapure water spray cleaning; performing reverse flushing by ultrapure water at the preset flow speed and the preset time; (2) chemical cleaning: performing cyclic cleaning and static soaking by compound chemicals at the preset flow speed and the preset time, wherein the temperature of chemical cleaning is room temperature. Heating is not needed; the energy consumption can be reduced; the chemical cleaning is performed by using thepreset prepared compound chemicals; the multi-step cleaning is not needed; the traditional cleaning steps are greatly simplified; the cleaning time is greatly reduced; the cleaning effect is good; thecleaning efficiency is high; the cleaning method is applicable to industrial popularization and application.

Description

technical field [0001] The invention relates to the technical field of membrane cleaning methods, in particular to a cleaning method for flat ceramic membranes. Background technique [0002] In recent years, with the continuous acceleration of urbanization, the pollution of water environment has become more and more serious, and the problem of water resource shortage has become prominent. Effectively treating wastewater and realizing resource reuse is an important way to prevent and control water pollution and alleviate water shortages. Membrane treatment technology has been widely used in the field of wastewater treatment and reuse due to its advantages of high separation efficiency, convenient operation, compact equipment, no phase change and energy saving. Inorganic ceramic membrane has the advantages of corrosion resistance, high temperature resistance, stable structure, high mechanical strength and long service life, so it has become a hot spot in the development and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02B01D69/06
CPCB01D65/02B01D69/06B01D2321/04B01D2321/16
Inventor 张守彬钟敬秀孙葳李钰泽马国强吕莹
Owner UNIV OF JINAN
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