Apparatus and method for dehalogenation regeneration of waste and old electric plastics

A technology for dehalogenation and plastics, which is applied in the regeneration of high-halogen-containing waste plastics and waste electronic plastics regeneration devices. It can solve the problems of high energy consumption in the treatment process, high cost of product separation and purification, and poor economic benefits, so as to ensure environmental protection. Friendliness, guaranteed recycling and high quality and high use, and the effect of reducing viscosity

Inactive Publication Date: 2008-07-16
SOUTH CHINA UNIV OF TECH
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This method is completely resourceful, using waste plastics to directly generate fuel oil or chemical raw materials, which expands the application range of waste plastics, but the process consumes a lot of energy, the cost of separation and purification of the products is high, and the economic benefits are poor. At present, it has not been put into commercial use. clear comparative advantage in operation

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  • Apparatus and method for dehalogenation regeneration of waste and old electric plastics

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Effect test

Embodiment 1

[0029] Embodiment 1: Vacuum dehalogenation-regeneration treatment of TV casing:

[0030] Elemental analysis was carried out after crushing the plastic PS plastic sample of waste TV casing, and the mass percentage content of bromine in the sample was measured to be 5.12%. In addition, it was determined by gas chromatography and mass spectrometry (GC-MS) Heptabromodiphenyl ether (7Br-PBDE), octabromodiphenyl ether (8Br-PBDE), etc. Put 100kg of waste electronic plastic samples of the above waste TV casing plastic PS plastics into the feeder after sorting and crushing; dry at 80°C, remove the moisture in the raw materials and send them to the dehalogenation reactor; at a temperature of 300°C , under the pressure of 60kPa, after 30 minutes of reaction, the brominated flame retardants (BFRs) are transformed into small molecule brominated compounds, which are separated from the waste electronic plastic melt in the form of gas, thereby realizing dehalogenation, and the removal rate of...

Embodiment 2

[0032] Elemental analysis was carried out after crushing the plastic PS plastic sample of waste TV casing, and the mass percentage content of bromine in the sample was measured to be 5.12%. In addition, it was determined by gas chromatography and mass spectrometry (GC-MS) Heptabromodiphenyl ether (7Br-PBDE), octabromodiphenyl ether (8Br-PBDE), etc. Add 100kg of waste electronic plastic samples of the above-mentioned waste TV casing plastic PS plastics to the feeder after sorting and crushing; dry at 100°C, remove the moisture in the raw materials and send them to the dehalogenation reactor; at a temperature of 330°C , under the pressure of 50kPa, after 40 minutes of reaction, the brominated flame retardants (BFRs) are transformed into small molecule brominated compounds, which are separated from the waste electronic plastic melt in the form of gas, thereby realizing dehalogenation, and the removal rate of halogen reaches 96%. The tail gas of this system mainly comes from the d...

Embodiment 3

[0034] Elemental analysis was carried out after crushing the plastic PS plastic sample of waste TV casing, and the mass percentage content of bromine in the sample was measured to be 5.12%. In addition, it was determined by gas chromatography and mass spectrometry (GC-MS) Heptabromodiphenyl ether (7Br-PBDE), octabromodiphenyl ether (8Br-PBDE), etc. Put 100kg of waste electronic plastic samples of the above waste TV casing plastic PS plastics into the feeder after sorting and crushing; dry at 150°C, remove the moisture in the raw materials and send them to the dehalogenation reactor; at a temperature of 350°C , under the pressure of 40kPa, after 50 minutes of reaction, the brominated flame retardants (BFRs) are transformed into small molecule brominated compounds, which are separated from the waste electronic plastic melt in the form of gas, thereby realizing dehalogenation, and the removal rate of halogen reaches 98%. The tail gas of this system mainly comes from the dehalogen...

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Abstract

The invention discloses a device used for dehalogenation and regeneration of waste and old electronic plastic and a method thereof. The device comprises a dehalogenation and regeneration system of the waste and old electronic plastic and a two-step tail gas purification and treatment system, wherein, the dehalogenation and regeneration system of the waste and old electronic plastic consists of a feeder, a preprocessor, a dehalogenation reactor, a regenerator, a regenerating plastic cooler and a granulator that are connected in sequence; an absorption liquid collecting tank of the two-step tail gas purification and treatment system is connected with a tail gas absorption tower by an absorption liquid circulating pump, and the tail gas absorption tower is further connected with the absorption liquid collecting tank; the dehalogenation reactor is connected with an inlet arranged at the lower end of the tail gas absorption tower through an air guide pipeline. The method comprises steps of preprocessing of the waste and old electronic plastic, vacuum dehalogenation, treatment of the tail gas from dehalogenation, modification of fused mass, plasticity repairing, cooling, solidification and molding of the fused mass and granulation, etc. The invention is applicable to regeneration of the waste and old electronic material represented by TV shells and other high-bittern containing waste and old plastic and is characterized by being environment friendly.

Description

technical field [0001] The invention relates to the treatment of waste electronic and electric appliance plastics, in particular to a device and method for recycling waste electronic plastics. The invention is also suitable for regeneration of other high-halogen-containing waste plastics. Background technique [0002] In recent years, with the rapid development of the electronics industry, more and more waste electrical appliances have entered the garbage recycling market. Most electronic plastics are added with halogenated flame retardants because they need to meet high safety standards. If they are not handled properly, they will bring about serious environmental problems while recycling useful resources. At present, my country's waste electronic appliances recycling market is very chaotic and irregular, the overall technical level is low, and the harm to the environment is quite serious. It is believed that after the promulgation of the "Regulations on the Administratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/06C08J3/20B29B17/00C08L101/00
CPCY02W30/62
Inventor 陈烈强关国强王保玉彭绍洪周文贤
Owner SOUTH CHINA UNIV OF TECH
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