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Method for generating regenerated diaphragm through extracting PVDF from waste diaphragms

A technology for regenerating membranes and membranes, applied in the field of organic solid waste recycling, can solve problems such as secondary pollution of the environment, and achieve the effects of reducing pollution, reducing production costs and realizing reuse.

Active Publication Date: 2015-10-07
江苏沛尔膜业股份有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

If it is not properly disposed of, it will inevitably cause serious secondary pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1. Clean the waste film

[0013] Put 20 pieces of 1.0㎡ waste membrane elements into the ultrasonic cleaning machine, add water to 2 / 3 of the cleaning machine, then add 300ml of hydrochloric acid, 2000ml of citric acid, then add water until full, turn on the ultrasonic cleaning machine for 2 hours, and take out the membrane elements Check whether it is clean (the surface of the membrane is white, if there is no attachment, it is clean)

[0014] 2. Cutting

[0015] Cut the membrane on the cleaned membrane element into small pieces (on the cutting table). Function: facilitate dissolution and centrifugation.

[0016] 3. Drying

[0017] The small pieces of membranes were dried in an oven.

[0018] 4. Dissolve

[0019] Put the dry and clean small piece of membrane into the dissolution kettle, then add 30 liters of NMP, adjust the temperature of the dissolution kettle to 70°C, turn on the dissolution kettle, and rotate it at a low speed for 2-3 hours.

[00...

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PUM

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Abstract

A method for generating a regenerated diaphragm through extracting PVDF from waste diaphragms is characterized in that the waste diaphragms are cleaned and dissolved as a raw material to form a diaphragm casting solution. The recycling rate is high and reaches 98%; the diaphragm can be repeatedly used, so the production cost is greatly reduced, and industrialization becomes possible; and the PVDF recovery effect is good, the PVDF pollution is greatly reduced, the production environment is good, and clean production and sustainable development are realized.

Description

technical field [0001] The invention relates to the field of resource utilization of organic solid waste, in particular to the extraction and regeneration of filter membranes. Background technique [0002] Waste diaphragm refers to the diaphragm on the membrane element used in the sewage treatment technology MBR. The amount of polyvinylidene fluoride (PVDF) membranes in the field of sewage treatment in my country is increasing year by year, and its service life is about 3-7 years. These wastes contain a large amount of toxic pollutants. Because PVDF has excellent chemical corrosion resistance, excellent high temperature color change resistance and oxidation resistance, excellent wear resistance, flexibility, high tensile strength and impact resistance strength, excellent resistance to ultraviolet rays and high-energy radiation Sex, can not be decomposed under natural conditions. If it is not properly disposed of, it will inevitably cause serious secondary pollution to the...

Claims

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Application Information

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IPC IPC(8): C08J11/08C08J5/18C08L27/16B01D71/34B01D69/06
CPCY02W30/62
Inventor 张林中
Owner 江苏沛尔膜业股份有限公司
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