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Treatment method of used household electric appliances

A processing method and technology for home appliances, applied in the direction of household components, household appliances, other household appliances, etc., can solve the problems of non-recycling, low purity of raw materials, and difficulty in sorting with high purity, so as to improve purity and quality, suppress pollution, The effect of economical treatment

Active Publication Date: 2010-10-06
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(1) Although most of polyurethane, which is a thermal insulation member with a small specific gravity, can be recycled, some parts are still not recycled
(2) The outer box and the inner box with a large specific gravity are mixed together due to crushing, and it is difficult to separate them with high purity
However, in this technology, there is a problem of increasing drainage treatment equipment and drainage treatment costs due to the use of water
Furthermore, as a method that does not use water, there is a method of separating plastic fragments into various types by using electrostatic properties, but including the former technology, since small polyurethane lumps or powders that are not completely sorted, metals (including lead, etc.) ) and other impurities, so there is the problem of low purity of raw materials after sorting and recycling
[0009] Furthermore, the above-mentioned prior art cannot remove harmful substances such as lead-containing substances, mercury-containing substances, asbestos, and combustible substances contained in the frame or components in the second-stage pulverization.
For example, if the motor or compressor is directly pulverized, there is a problem that the harmful substances contained in the motor or compressor cannot be removed.

Method used

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  • Treatment method of used household electric appliances
  • Treatment method of used household electric appliances
  • Treatment method of used household electric appliances

Examples

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Embodiment 1

[0031] figure 1 An example of the present invention is shown, and in particular, it shows a process for recovering members of specific materials from home appliances such as old refrigerators, washing machines, air conditioners, and televisions. In this embodiment, the process is roughly composed of the first process 10 of taking out the functional components that can be separated into blocks and separating them from the frame as the first stage; as the second stage, removing the separated compressor, motor, etc. The second step 20 of separating and sorting functional parts into raw materials; the third step 30 of reducing the size of components for each sorted and recovered raw material to achieve high purity and high quality constitute. Each step will be described below.

[0032] The first step 10 in the first stage will be described below. In this embodiment, refrigerators, washing machines, air conditioners, and televisions are exemplified as home appliances. 4( a ) to...

Embodiment 2

[0057] use image 3 A modified example of the third stage will be described. In this variant, in figure 1 The vibrating conveyor belt 351 , the magnetic separator 3521 or the eddy current separator 3531 are installed downstream of the metal pulverizer 350 in the third step 30 shown. In this modified example, while conveying the chips obtained from the metal shredder 350 by the vibrating conveyor belt 351 , the chips and surrounding dust are sucked by the vacuum cleaner 3541 to obtain dust 354 .

[0058] The raw materials obtained in the first stage or the second stage may not necessarily be completely decomposed into a single raw material. In this case, first, the chips conveyed on the vibrating conveyor belt 351 are separated into iron chips and non-iron chips by the magnetic separator 3521 arranged downstream of the metal shredder 350 . Next, the fragments separated from the iron fragments are conveyed to the downstream side by the vibrating conveyor belt 351 and the like...

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Abstract

This treatment method of used household electric appliances is for disassembling the used household electric appliances including any one of a refrigerator, a washing machine, an air conditioner and a TV set and taking out recyclable raw materials. The method comprises a process of taking off components composed of metals including any one of iron, copper and aluminum and disposed as lumps and plastic components from the household electric appliances, and a process of sorting casings of the household electric appliances formed by joining the metallic parts and plastic parts for every kind of the plastic, or to metals of different kinds of raw materials. Respective raw materials obtained in this process is crushed to a given size or less to be recovered as the raw materials.

Description

[0001] This application is a divisional application of a patent application with application number 200710003981.5, the filing date being January 19, 2007, and the invention title being "Method for Processing Old Home Appliances". Technical field [0002] The present invention relates to a method for disassembling used products such as refrigerators, washing machines, air conditioners, televisions and other household appliances and processing them for reuse as other components. In particular, the present invention relates to a method for recovering components as resources from the above-mentioned old household appliances. . Background technique [0003] As a technology for recycling the above-mentioned old household appliances such as refrigerators, washing machines, air conditioners, and televisions, it is known to disassemble parts from these household appliances, sort them for each part, and then separate the remaining frames. The body and other parts are crushed and clas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00B29B17/00
CPCB29L2031/7622B29L2031/286B29K2025/00B29B17/02Y02W30/62
Inventor 马场研二根本武
Owner HITACHI LTD
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