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Waste refrigerator recovering and processing method

A technology of recycling and refrigerators, which is applied in the direction of electronic waste recycling, recycling technology, and solid waste removal, etc., can solve the problems of uneconomical maintenance of old electrical and electronic products, high labor costs, and restrictions on the development of second-hand electrical and electronic products. Achieve the effect of reducing processing cost, convenient operation and high recovery efficiency

Inactive Publication Date: 2013-01-09
HUIZHOU DINGCHEN IND DEV
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AI Technical Summary

Problems solved by technology

Labor costs in developed countries are high, and it is often uneconomical to pay for repairing old electrical and electronic products, which limits the development of the second-hand electrical and electronic product market

Method used

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with embodiment.

[0010] The method for recycling waste refrigerators has the following steps.

[0011] (1) Refrigerator recycling and pre-dismantling: Classify waste refrigerators according to the type of refrigerant used and foaming agent for insulation materials. The materials to be dismantled include parts with high raw material value and substances containing environmental risk substances; extract R12 refrigeration remove the printed circuit board; remove the parts that will adversely affect the crushing and sorting process: glass partitions, compressors, door seals, capacitors, wires;

[0012] (2) Recycling and processing the freon-type foaming agent R11 in the polyurethane of the insulation layer of the refrigerator, breaking the polyurethane containing the foaming agent into a particle size of 0.3mm, and escaping the R11 after pressurization, cooling, cooling and liquefaction, and the liquid R...

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PUM

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Abstract

The invention discloses a waste refrigerator recovering and processing method. The method comprises the steps of recovering and pre-dismounting a refrigerator: extracting an refrigerant R12 and lubricating oil; detaching a printed circuit board; and detaching parts which do not cause bad influences on a crushing and sorting procedure after the parts are detached, such as a glass separation plate, a compressor, a door seal, a capacitor and an electric wire. A Freon foaming agent R11 in polyurethane of a heat-insulation layer in a refrigerator is recycled and the polyurethane containing the foaming agent is crushed to be granularity being 0.3mm; and pressurizing, reducing the temperature, cooling and liquefying to escape the R11; and enabling the liquid R11 to pass through a gas-liquid filter and finally adding the liquid R11 into a storage pot. The waste refrigerator recovering and processing method has the advantages of high recovery efficiency, convenience in operation and low treatment cost.

Description

technical field [0001] The invention relates to a method for recycling and treating waste refrigerators. Background technique [0002] CFC refrigerants (chlorofluorocarbons) refrigerants include R11, R12, R113, R114 and R115. These products are classified as high ODP (ozone depletion potential) and high GWP (global warming potential) products. These products are subject to numerous usage legislations. The European RAL standard stipulates that after the extraction of R12 refrigerant, the residual amount of refrigerant in the lubricating oil shall not exceed 0.1%; the residual amount of R11 in the foamed polyurethane of the refrigerator insulation layer after treatment shall not exceed 0.2%; during the treatment process, R11, R12 Do not leak. At present, the recycling and processing methods of waste refrigerators include: sending the pre-disassembled refrigerators into the high-speed automatic cutting and dismantling system, cutting the refrigerators into three parts, sorti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCY02W30/82
Inventor 林春涛
Owner HUIZHOU DINGCHEN IND DEV
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