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Method for full constituent utilizing resources of wastes of plastic containing chlorine in fluid bed

A fluidized bed and waste technology, applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, etc., can solve the problems of waste of chlorine resources, low price, environmental pollution, etc., and achieve the effect of compact equipment and easy control.

Inactive Publication Date: 2007-10-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be absorbed to make hydrochloric acid, but the demand for hydrochloric acid is small and the price is low, and the discharge not only causes a lot of waste of chlorine resources, but also pollutes the environment

Method used

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  • Method for full constituent utilizing resources of wastes of plastic containing chlorine in fluid bed

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The reaction was carried out in a dual fluidized bed coupling system as shown in FIG. 1 . Sand with a particle size of 0.2mm is used as the heat carrier of the fluidized bed, and the real density of the sand is 2500kg / m 3 , bulk density is 1300kg / m 3 . CuO is a dechlorination agent, sand: CuO=5:1 (weight ratio). Add plastic waste solid particles with a screw feeder, the particle size is 2mm. The cracking fluidized bed maintains a temperature of 240°C, the regeneration fluidized bed maintains a temperature of 360°C, and the cracking fluidized bed and the regeneration fluidized bed are kept connected. After 3 hours, the connection between the two beds was cut off, and the temperature of the cracking fluidized bed was raised to 360° C. to crack other components in the plastic. Experimental results: HCl removal rate is 67.2%, HCl is converted to Cl 2 The yield was 81.5%, and the oily rate was 67%.

Embodiment 2

[0029]The reaction was carried out in a dual fluidized bed coupling system as shown in FIG. 1 . Sand with a particle size of 0.2 mm is used as the heat carrier of the fluidized bed, CuO is used as the dechlorination agent, and sand: CuO=4.5:1 (weight ratio). Add plastic waste solid particles with a screw feeder, the particle size is 2mm. The cracking fluidized bed temperature is maintained at 280°C, and the regeneration fluidized bed temperature is 400°C. The experimental results are: HCl removal rate is 98.2%, HCl is converted into Cl 2 The yield was 98.5%, and the oil yield was 79%.

Embodiment 3

[0031] The reaction was carried out in a dual fluidized bed coupling system as shown in FIG. 1 . Sand with a particle size of 0.2 mm is used as the heat carrier of the fluidized bed, CuO is used as the dechlorination agent, and sand:CuO=5.5:1 (weight ratio). Add plastic waste solid particles with a screw feeder, the particle size is 2mm. The cracking fluidized bed temperature is maintained at 320°C, and the regeneration fluidized bed temperature is 400°C. Experimental results: HCl removal rate is 99.2%, HCl is converted to Cl 2 The yield is 93.5%, the selectivity is 99%, and the oily rate is 76%.

[0032] Chlorine and hydrogen chloride are important forms of chlorine. Chlorine gas is the primary raw material for the production of various chlorine-containing products, including the production of PVC, polyurethane epoxy, silicone, synthetic rubber, HCFCs, TiO 2 paint etc. Chlorine for industrial use is mainly obtained by electrolysis of salt water and caustic soda. At pres...

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Abstract

This invention discloses a method for utilizing all components of chloric plastic waste in pyrolysis / regeneration double fluidized beds. The method comprises: removing HCl and pyrolyzing in the pyrolysis fluidized bed, and regenerating antichlor CuO and releasing Cl2 in the regeneration fluidized bed. The two fluidized beds are connected via a connecting pipe, and CuO / CuCl2 are fluidized between the two plastic decomposition, thus can prevent apparatus corrosion and effectively utilize chlorine-free oil product. CuCl2 produced by reaction between HCl and CuO can be regenerated into CuO, and can obtain Cl2 with a high added value.

Description

technical field [0001] The invention belongs to the technical scope of waste utilization, and in particular relates to a method for fully utilizing chlorine-containing plastic waste as a resource in a fluidized bed for recovering effective oil from chlorine-containing plastic waste such as polyvinyl chloride (PVC). Background technique [0002] The amount of domestic waste in China is huge. In 2002, the volume of garbage removal and transportation was 136.5 million tons. It is urgent to develop advanced urban domestic waste treatment technology for large-scale harmless treatment. In more developed cities in China, waste plastics account for 8% to 15% of the total mass of garbage, and the volume fraction reaches about 30%. Plastics are synthesized from natural resources such as petroleum, natural gas, and coal. A large amount of plastic waste not only causes serious environmental pollution, but also leads to a great waste of social wealth in the context of increasingly scarce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
Inventor 吴玉龙杨明德陈镇党杰胡湖生
Owner TSINGHUA UNIV
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