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Method for preparing high-quality tar by pyrolyzing plastic wastes

A waste, high-quality technology, used in the preparation of liquid hydrocarbon mixtures, products, coke ovens, etc., can solve the problems of cluttered products, low content of gasoline and diesel fractions, rough production processes, etc., to improve the octane number. , The effect of low operating cost and flexible operation

Inactive Publication Date: 2020-09-15
汕头市谷源新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing pyrolysis technology is simple, but the production process is rough, the product is messy, and the content of gasoline fraction and diesel fraction is not high
Therefore, the existing pyrolysis technology needs to be improved

Method used

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  • Method for preparing high-quality tar by pyrolyzing plastic wastes
  • Method for preparing high-quality tar by pyrolyzing plastic wastes
  • Method for preparing high-quality tar by pyrolyzing plastic wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0057] In the present invention, wt% means weight%.

[0058] Plastic waste rich in polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), etc. is sent to the pyrolysis reactor, and the temperature of the pyrolysis reaction is controlled at 500°C , the system maintains a slightly positive pressure operation (1-5KPa), and the generated high-temperature pyrolysis steam is sent to the catalytic reactor, and the catalytic reactor adopts a fluidized bed reactor. The catalytic cracking temperature is controlled at 450°C, the catalytic reactor is heated and kept warm by electric heating, and the catalyst is Al 2 o 3 -SiO 2 solid catalyst. After 3 days of operation, the catalyst is regenerated in the catalyst regenerator, the regeneration method is air combustion, and the temperature is 900°C. The high-temperature pyrolysis steam is exported from the outlet of the catalytic reactor into the condensation separation device, and light oil, pyrolysis water a...

Embodiment 2

[0068] Plastic wastes rich in polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), etc. are sent to the pyrolysis reactor, and the temperature of the pyrolysis reaction is controlled at 500°C , the system maintains a slightly positive pressure operation (1-5KPa), and the generated high-temperature pyrolysis steam is sent to the catalytic reactor, and the catalytic reactor adopts a fluidized bed reactor. The catalytic cracking temperature is controlled at 450°C, the catalytic reactor is heated and kept warm by electric heating, and the catalyst is Al 2 o 3 -SiO 2solid catalyst. After running for 3 days, it will be regenerated in the catalyst regenerator. The regeneration method is air combustion and the temperature is 900°C. The high-temperature pyrolysis steam is exported from the outlet of the catalytic reactor into the condensation separation device, and light oil, pyrolysis water and pyrolysis gas are separated. Part of the pyrolysis gas is...

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Abstract

The invention provides a method for preparing high-quality tar by pyrolyzing plastic wastes. The method comprises the following steps that the plastic waste is subjected to a pyrolytic reaction in a pyrolytic reactor, pyrolytic steam and pyrolytic carbon are generated, the pyrolytic steam is subjected to a catalytic modification reaction in a catalytic reactor, the temperature of the catalytic modification reaction ranges from 400 DEG C to 600 DEG C, and a catalyst of the catalytic modification reaction is a solid acid catalyst; the pyrolysis steam subjected to catalytic modification is condensed, and pyrolysis oil and pyrolysis gas are separated out, wherein the content of gasoline fraction in the pyrolysis oil is 11.8 wt% or above, the content of diesel fraction in the pyrolysis oil is 40.3 wt% or above, and the content of heavy oil fraction in the pyrolysis oil is 28.4 wt% or above. The method can overcome the defect of low quality of gasoline and diesel oil prepared by a plastic waste thermal cracking method in the prior art and is flexible to operate and low in operating cost.

Description

technical field [0001] The invention relates to the field of plastic waste treatment, in particular to a method for recycling plastic waste and preparing high-quality tar. Background technique [0002] With the advancement of science and technology, plastics play an increasingly important role in modern life, and the production and consumption of plastics are also increasing. It is estimated that by 2050, 26 billion tons of plastic waste will be generated. Since plastics will not be easily degraded, and the traditional plastic disposal methods are mainly landfill and incineration, the pollution of plastics to the environment has intensified. At present, there have been reports on the use of pyrolysis technology to treat plastics. Compared with traditional landfill and incineration methods, pyrolysis technology is receiving more and more policy support and industry affirmation. [0003] However, the existing pyrolysis technology has a simple process, but the production proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/10C10G1/00C10B53/07
CPCC10G1/10C10G1/002C10B53/07C10G2300/1003Y02P20/143
Inventor 王雨田
Owner 汕头市谷源新能源有限公司
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