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Method for cleaning filter element of filter at normal temperature

A filter and filter element technology, used in filter regeneration, chemical instruments and methods, filtration and separation, etc., can solve the problems of affecting the service life of the filter element, high energy consumption, and high processing temperature, so as to prolong the service life and reduce pollutant emissions. , the effect of low energy consumption

Inactive Publication Date: 2018-06-22
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of regenerated cellulose materials using natural cellulose as raw material, because of the structural characteristics of a large number of hydrogen bonds between and within the cellulose molecules, the hydrolysis method cannot effectively clean the filter element; The undissolved cellulose colloids are thermally decomposed and removed, but because the treatment temperature is high, it is easy to oxidize the metal, which will seriously affect the service life of the filter element, and the energy consumption is large, which will pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A normal temperature cleaning method for a filter element, comprising the following steps:

[0021] (1) preparation concentration is the DMAc solution of the 1-ethyl-3-methylimidazole acetate of 60%;

[0022] (2) Soak the filter element to be cleaned with a precision of 20 μm in the solution in step (1) for 10 hours at 50°C;

[0023] (3) After the filter element in step (2) is taken out, wash it in an ultrasonic oscillator for 1.5 hours;

[0024] (4) Drying the filter element in step (3).

[0025] Through the inspection of the stereo microscope, there is no damage or plugging phenomenon on the surface of the filter element, and the gap of the filter layer is normal; through the detection of the air bubble method, the precision of the filter element is 19.1 μm, which is within the normal range.

Embodiment 2

[0027] A normal temperature cleaning method for a filter element, comprising the following steps:

[0028] (1) preparation concentration is 70% 1-allyl-3-methylimidazolium chloride salt DMF solution;

[0029] (2) At 40°C, immerse the filter element to be cleaned with a precision of 25 μm in the solution in step (1) for 8 hours;

[0030] (3) After the filter element in step (2) is taken out, wash it with water in an ultrasonic oscillator for 2 hours;

[0031] (4) Drying the filter element in step (3).

[0032] Through the inspection of the stereo microscope, there is no damage or plugging on the surface of the filter element, and the gap of the filter layer is normal; through the detection of the air bubble method, the precision of the filter element is 24.5 μm, which is within the normal range.

Embodiment 3

[0034] A normal temperature cleaning method for a filter element, comprising the following steps:

[0035] (1) preparation concentration is the 1-butyl-3-methylimidazole acetate DMSO solution of 50%;

[0036] (2) At 25°C, soak the solution of the filter element to be cleaned with a precision of 30 μm in step (1) for 12 hours;

[0037] (3) After the filter element in step (2) is taken out, wash it with water in an ultrasonic oscillator for 2 hours;

[0038] (4) Drying the filter element in step (3).

[0039] Through the inspection of the stereo microscope, there is no damage or plugging phenomenon on the surface of the filter element, and the gap of the filter layer is normal; through the detection of the air bubble method, the precision of the filter element is 29.6 μm, which is within the normal range.

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Abstract

The invention discloses a method for cleaning a filter element of a filter at the normal temperature. The method comprises the following steps: (1) evenly mixing an ionic liquid and a cosolvent proportionally to prepare a cleaning agent; (2) immersing the to-be-cleaned filter element in the cleaning agent for 2-16 hours at the temperature of 20-50 DEG C; (3) taking out the filter element, furtherwashing with water to wash the ionic liquid and the organic solvent; (4) drying the above filter element. After being dried, the filter element is detected by a stereoscopic microscope and is subjected to bubble detection. The cleaning method is low in washing energy consumption and has a good cleaning effect, the service life of the filter element is prolonged, the cleaning liquid can be recycled, the pollutant discharge is reduced, and the green cleaning is realized.

Description

technical field [0001] The invention relates to a normal-temperature cleaning method for a filter core, in particular to a normal-temperature cleaning method for filtering a cellulose solution filter core in the production process of regenerated cellulose products, and belongs to the field of regenerated cellulose product production. Background technique [0002] With the increasing shortage of fossil resources such as petroleum, coal, and natural gas, more and more attention has been paid to the utilization of cellulose, which has abundant sources in nature. Cellulose can be processed into different types of regenerated cellulose materials (fibers, films), which are widely used in daily life and modern industry. However, whether the traditional viscose method or the new direct solvent method is used, the production process of regenerated cellulose materials must filter the cellulose solution, and use the filter to filter out the undissolved colloidal particles to ensure con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D41/04
CPCB01D41/04
Inventor 张军李瑞丰余坚邱金江武进张晓煜张金明贾锋伟张东光崔增亮李军波许丽丽边守娟咸炳斌
Owner INST OF CHEM CHINESE ACAD OF SCI
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