Two-stage vacuum hot chemical treating and recovering process and apparatus for halogen-containing waste plastic

A technology for thermochemical treatment and waste plastics, which is applied in the field of two-stage vacuum thermochemical treatment and recovery devices for halogen-containing waste plastics. It can solve the problems of high halogen content, high cost, and inability to regenerate, so as to achieve complete separation of halogens and increase volatility. , the effect of reducing the number
CN1810865AInactive Publication Date: 2006-08-02SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2006-08-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses two-stage vacuum heat chemical treating and recovering process and apparatus for halogen containing waste plastic. The process includes melting the waste plastic, separating fire retardant, condensing fire retardant gas, treating un-condensed gas, pyrolysis of waste plastic melt, condensing pyrolysis gas, treating pyrolysis residue and other steps. The apparatus for the treatment includes feeding bin, vacuum melting and separating tank with feeding screw, stirrer, vacuum pyrolysis reactor with feeding screw, fire retardant gas condenser, pyrolyzed oil condenser, gas washing tower, un-condensed gas treating system, vacuum pump, halogen containing fire retardant collecting tank, low halogen pyrolyzed oil collecting tank, pyrolysis residue discharging screw, vacuum sealing valve, pyrolysis residue storage and electric heating system.
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Description

technical field

[0001] The invention relates to a method for recycling halogen-containing waste plastics, in particular to a two-stage vacuum thermochemical treatment recovery method for halogen-containing waste and old thermoplastics containing additive-type halogen-based flame retardants.

[0002] The invention also relates to a two-stage vacuum thermochemical treatment and recovery device for halogen-containing waste plastics. Background technique

[0003] With the rapid development of the plastics industry and the electrical and electronic industries in the past ten years, the problem of handling a large number of halogen-containing plastics in waste plastics, especially waste electrical and electronic equipment, is very prominent. In electrical and electronic equipment, halogenated flame retardants are added to many plastic parts for safety reasons. If incineration is used to recover energy, the halogens in the flame retardants may form highly toxic carcinogens such as...

Claims

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