Waste plastic radiation thermal cracking process and system

Abstract

The invention relates to the technical field of plastic cracking, and particularly provides a waste plastic radiation thermal cracking process and system. The process comprises first-stage cracking and second-stage cracking, waste plastics are molten in the first-stage cracking and are cracked into light oil, cracking gas and slag charge in the second-stage cracking, and the slag charge enters the first-stage cracking to serve as a waste plastic melting medium to be cooperatively molten with the waste plastics; and cracked gas generated by second-stage cracking is stored as fuel for later use, and light oil is extracted and recycled. On the basis of the principle of cracking high-quality combustible gas, the cracking equipment mainly adopts radiation cracking, while the heating pipe performs radiation heating decomposition on waste plastics, high-molecular-weight organic matters are further decomposed into combustible gas with a high combustion value after passing through the 800 DEG C high-temperature pipe, and the gas production rate is high. The waste plastic radiation thermal cracking process and system solve a series of problems of overhigh cost, environmental pollution and the like caused by the fact that waste plastic treatment mainly adopts physical regeneration recovery, landfill and incineration power generation methods in the prior art.

Description

technical field [0001] The disclosure relates to the technical field of plastic cracking, and specifically provides a waste plastic radiation thermal cracking process and system. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] At present, with the development of industry, more and more plastics are used, so the recycling of waste plastics has become a major problem. At present, the recycling of waste plastics mainly includes physical recycling methods, landfills, and incineration for power generation. [0004] However, due to the high quality requirements for plastics, the physical recycling method requires no impurities, and requires a lot of pre-treatment work such as sorting, so its application range is limited. As for landfill, there is a problem of encroaching on limited cultivated land and seriously wasting land resources, and it will caus...

AI Technical Summary

Problems solved by technology

[0006] In view of the existing technology, the waste plastics are mainly treated by physical recycling, landfill, incineration and power generation, and there are a series of problems such as high cost and environmental pollution.

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