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Nano coating modified ceramic microfiltration membrane cleaning agent and preparation method and application thereof

A technology of ceramic microfiltration and modification, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the deterioration of oil-water separation performance of modified ceramic microfiltration membranes, corrosion of nano-modified oxide particles, Affect the modification effect of ceramic microfiltration membrane, etc., to achieve the effect of shortening the cleaning time, high natural degradation rate and good cleaning effect

Active Publication Date: 2014-07-02
重庆兀盾纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The content of alkaline hydroxide is high, which easily corrodes the highly active and fine nano-modified oxide particles, which affects its modification effect on the ceramic microfiltration membrane, and makes the oil-water separation performance of the modified ceramic microfiltration membrane deterioration
[0006] (2) The cleaning process is complicated, the cleaning time is long, and the nano-modified oxide is easily corroded further
[0007] (3) Containing too much phosphate, the discharge of its cleaning waste liquid will cause the water body to become "over-fertilized" and "rich in oxidation" and deteriorate the water quality, causing new serious pollution to the ecological environment of the water area

Method used

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  • Nano coating modified ceramic microfiltration membrane cleaning agent and preparation method and application thereof
  • Nano coating modified ceramic microfiltration membrane cleaning agent and preparation method and application thereof
  • Nano coating modified ceramic microfiltration membrane cleaning agent and preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] The present embodiment nano-coating modification modified ceramic microfiltration membrane cleaning agent, its composition by mass percentage is as follows:

[0037]

[0038] The preparation method of the cleaning agent in this example is as follows: add the above-mentioned components into a container device with stirring and grinding, and stir and mix at room temperature for 3 hours to obtain the finished cleaning agent.

[0039] The cleaning agent in this example is used to clean the nano-oxide modified ceramic microfiltration membrane polluted by the oily waste water of the cold rolling emulsion, and the cleaning method is as follows:

[0040] a. The cleaning agent is prepared into a cleaning solution (pH<12) with a mass percent content of 1.5%, for use;

[0041] b. After the ceramic microfiltration membrane device is emptied of the feed liquid, wash it with hot water at 60°C for 5 minutes;

[0042] c. After the cleaning solution is heated to 60°C, clean the cera...

Embodiment 2

[0046] The present embodiment nano-coating modification modified ceramic microfiltration membrane cleaning agent, its composition by mass percentage is as follows:

[0047]

[0048] The preparation method of the cleaning agent in this example is as follows: add the above-mentioned components into a container device with stirring and grinding, and stir and mix at room temperature for 5 hours to obtain the finished cleaning agent.

[0049] The cleaning agent in this example is used to clean the nano-oxide modified ceramic microfiltration membrane polluted by the oily waste water of the cold rolling emulsion, and the cleaning method is as follows:

[0050] a. The cleaning agent is prepared into a cleaning solution (pH<12) with a mass percent content of 1.3%, for use;

[0051] b. After the ceramic microfiltration membrane device is emptied of the feed liquid, wash it with hot water at 60°C for 5 minutes;

[0052] c. After the cleaning solution is heated to 60°C, clean the cera...

Embodiment 3

[0056] The present embodiment nano-coating modification modified ceramic microfiltration membrane cleaning agent, its composition by mass percentage is as follows:

[0057]

[0058] The preparation method of the cleaning agent in this example is as follows: add the above-mentioned components into a container device with stirring and grinding, and stir and mix at room temperature for 4 hours to obtain the finished cleaning agent.

[0059] The cleaning agent in this example is used to clean the nano-oxide modified ceramic microfiltration membrane polluted by the oily waste water of the cold rolling emulsion, and the cleaning method is as follows:

[0060] a. The cleaning agent is prepared into a cleaning solution (pH<12) with a mass percent content of 2.0%, and it is ready for use;

[0061] b. After the ceramic microfiltration membrane device is emptied of the feed liquid, wash it with hot water at 60°C for 5 minutes;

[0062] c. After the cleaning solution is heated to 60°C...

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Abstract

The invention discloses a nano coating modified ceramic microfiltration membrane cleaning agent, which consists of the following components in percentage by mass: 30 to 57 percent of composite surfactant, 15 to 35 percent of basic hydroxide, and 8 to 40 percent of cleaning aid. The invention also discloses a preparation method and application of the cleaning agent. The cleaning agent has a good cleaning effect, the permeation flux of a cleaned modified ceramic microfiltration membrane can almost be recovered, and the cleaning agent does not have an obvious corrosion effect on the modified ceramic microfiltration membrane and a nano modified oxide and prevents the structure and the performance of the modified ceramic microfiltration membrane from being affected by the cleaning process. Moreover, the cleaning agent is easy to prepare, convenient and feasible to use and high in cleaning efficiency; and the cleaning time is greatly shortened, the energy consumption of a system in the cleaning process is reduced, and secondary pollution to the environment due to the waste liquid of the cleaning agent is avoided.

Description

technical field [0001] The invention relates to the technical field of ceramic membrane cleaning, in particular to a cleaning agent for nano-coating modified ceramic microfiltration membranes. Background technique [0002] Due to the advantages of heat resistance, high strength, chemical corrosion resistance, controllable pore size distribution, easy regeneration, no "swelling" and long service life, ceramic membranes have attracted more and more attention in the research and application of wastewater treatment. Cold rolling emulsion wastewater is oily wastewater produced during steel rolling in steel mills. Its composition is complex, containing a large amount of mineral oil, animal and vegetable oil, and surfactants. Direct discharge will cause serious environmental pollution. However, due to the stable nature of the cold rolling emulsion oily wastewater and the difficulty of oil-water separation, it is difficult to treat it, which has become a major environmental problem ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/06
Inventor 张小珍周健儿汪永清常启兵梁健章婧胡学兵
Owner 重庆兀盾纳米科技有限公司
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