Mixed hydrolysis device and method for waste plastics

Abstract

The invention discloses a mixed hydrolysis device and method for waste plastics. The mixed hydrolysis device comprises a high-pressure hydrolysis system, a waste plastic crushing system and an ingredient pumping system, wherein the high-pressure hydrolysis system is configured to carry out hydrolysis treatment on the waste plastics, the waste plastic crushing system is configured to crush the waste plastics and convey the waste plastics into the high-pressure hydrolysis system, the ingredient pumping system comprises a mixer, a high-pressure pumping system and a preheating system, the mixer isconnected to the high-pressure pumping system, the high-pressure pumping system is connected to the preheating system, the preheating system is connected to a feed port of the high-pressure hydrolysis system, and the ingredient pumping system is configured to pump the ingredients of water, mother liquor and alcohol from the mixer to the preheating system and then convey the preheated ingredientsto the high-pressure hydrolysis system. According to the mixed hydrolysis device and method for the waste plastics, the degradation characteristics of the alcohol on the high-molecular plastics and the special advantages of the water served as a green reaction medium are fully utilized, and the alcohol and the water are dynamically combined to be served as a degradation reagent for the waste plastics, so that the waste plastics can be subjected to degradation reaction in a relatively simple system and at a relatively low temperature.

Description

technical field [0001] The invention relates to a mixed hydrolysis device and method for waste plastics, in particular to a device and a treatment method for degrading waste plastics using water and alcohol as treatment reagents under high temperature and high pressure conditions, and belongs to the field of environmental protection. Background technique [0002] Since the beginning of the 20th century, mankind has entered the era of polymer synthetic materials. Among them, due to the excellent characteristics of light weight, low price, insulation, heat insulation, corrosion resistance, beauty, practicality, and easy processing and molding, polymer plastics have replaced metal, wood, paper, ceramics and other materials in large quantities, and are widely used in the national economy. and all areas of production and life. With the continuous expansion of the application range of plastic products, the generation of waste plastics has increased dramatically. These plastic wa...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a device and method for degrading waste plastics using water and alcohol mixed reagents under high temperature and high pressure conditions, so that waste plastics can be degraded in a relatively simple system and at a relatively low temperature Degradation reaction occurs under certain conditions to solve the deficiencies in the prior art

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