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Cleaning method of polypropylene filter cloth

A filter cloth and polypropylene technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of insignificant soaking effect of washing powder, increase in operating costs and labor costs, and achieve high cost performance and reduced water consumption. , the effect of simple operation

Inactive Publication Date: 2016-05-25
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the washing powder is soaked, it needs to be washed again with clean water. This method belongs to offline cleaning. For some large filter presses, disassembly and installation are another big problem, and the operating cost and labor cost will increase accordingly.
However, the effect of soaking with washing powder is not very significant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The cleaning method of polypropylene filter cloth is as follows:

[0039] first step:

[0040] 1. Rinse the filter cloth with clean water until there is no obvious sediment;

[0041] 2. Configure the required acid solution (citric acid and hydrochloric acid compounded at a mass ratio of 1:1, then add water to dilute the mixed acid with a mass concentration of 1-5%) and spray it online for 5 minutes, and check that the pH of the cleaning solution is around 2 , soak for 15 minutes;

[0042] 3. Repeat the above action twice in a row.

[0043] Step two:

[0044] 1. Reconfigure the above acid cleaning agent, spray it online for 2 hours, check the pH of the cleaning solution and keep it at 2, soak for 6 hours;

[0045] 2. Repeat the above actions continuously.

[0046] third step:

[0047] 1. Rinse the PH with water to be neutral;

[0048] 2. Prepare a fungicide (isothiazolinone with a mass percentage concentration of 0.1-0.5%) and spray it online for 2 hours;

[0049...

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PUM

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Abstract

The invention provides a cleaning method of a polypropylene filter cloth. The cleaning method is characterized by being implemented on line and comprising acid pickling performed at least once, sterilization performed at least once and alkali washing performed at least once. According to the on-line cleaning method, operation is easy, the process is short, no additional labor cost or operation cost is needed, water consumption is greatly reduced, the effect is obvious, the polypropylene filter cloth is not damaged, the water flux is increased after treatment, the treatment cost is low, and the cost performance is high.

Description

technical field [0001] The invention relates to the field of filter cloth cleaning, in particular to a method for cleaning polypropylene filter cloth. Background technique [0002] Filter presses are mainly used for solid-liquid separation and are widely used in chemical and pharmaceutical fields. With the rapid development of industry and the acceleration of urbanization, more and more industrial and mining wastewater and domestic sewage treatment industries are becoming more and more prosperous. The treatment of sewage generally produces a large amount of sludge, which requires the sludge to be separated from Water is separated, but the common method in industry is to enter the filter press. [0003] The basic principle of the filter press is that the mixed liquid flows through the filter medium (filter cloth), and the solid stays on the filter cloth. Filter cloth can be divided into two categories according to the fiber material, one is natural fiber, such as cotton, wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D25/32A61L2/18A61L101/44A61L101/36A61L101/34A61L101/50
CPCB01D25/32A61L2/18A61L2202/26
Inventor 夏志先张金山林云
Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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