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Hydrothermal treatment device and method for waste plastics

A technology for waste plastics and hydrothermal treatment, which is applied in the field of waste plastics hydrothermal treatment equipment, and waste plastics are partially oxidized under high temperature and high pressure conditions and then hydrolyzed. It can solve the problems of increased separation and purification of degradation products, complex components of waste plastics, and high cost. problems, to achieve the effect of easy separation and purification, conducive to resource recovery and proper disposal

Pending Publication Date: 2018-12-28
ZUNYI NORMAL COLLEGE
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Problems solved by technology

However, due to the high cost of such reagents and their own environmental hazards, such as benzene, toluene, xylene, tetrahydrofuran and other organic reagents are important environmental pollutants
In addition, due to the complex composition of waste plastics, the degraded products also present the coexistence of various substances, and these substances may interact with the degradation reagents used, making it difficult to separate and purify the degraded products
In recent years, water under high-temperature and high-pressure conditions with special physical and chemical properties has gradually attracted people's attention as a green reagent. Deep research

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  • Hydrothermal treatment device and method for waste plastics

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and specific embodiment the invention is further introduced:

[0043] refer to figure 1 According to the present invention, a waste plastic hydrothermal treatment device includes: a hydrothermal oxidation system, a high-pressure hydrolysis system, a waste plastic crushing system, a batching pumping system and an oxidant pumping system. Among them, the hydrothermal oxidation system is used for partial oxidation reaction of waste plastics, even if the crushed waste plastic particles undergo partial oxidation reaction in high temperature and high pressure hydrothermal fluid; The mouth is connected to further hydrolyze the product after the oxidation reaction of the hydrothermal oxidation system to convert it into the target degradation product as much as possible; the waste plastic crushing system is connected to the feed port of the hydrothermal oxidation system to The plastic is pulverized and transported to the hydrotherma...

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Abstract

The invention discloses a hydrothermal treatment device and method for waste plastics. The hydrothermal treatment device comprises a hydrothermal oxidation system, a high-pressure hydrolysis system, awaste plastic smashing system, a mixture pumping system and an oxidizing agent pumping system, wherein the hydrothermal oxidation system is used for performing partial oxidation reaction on the wasteplastics; the high-pressure hydrolysis system is used for further hydrolyzing a product obtained after the oxidation reaction performed by the hydrothermal oxidation system; the waste plastic smashing system is used for smashing the waste plastics and conveying the smashed waste plastics to the hydrothermal oxidation system; the mixture pumping system is used for pumping a water and mother liquormixture to a first preheating system from a first high-pressure pumping system and conveying the preheated mixture to the hydrothermal oxidation system; the oxidizing agent pumping system is used forpumping an oxidizing agent to a second preheating system from a second high-pressure pumping system and conveying the preheated oxidizing agent to the hydrothermal oxidation system. According to thedevice and the method for adopting water as a degradation agent to perform partial oxidation and hydrolysis treatment sequentially under high temperature and high pressure conditions, the waste plastics can be degraded in the relatively simple hydrothermal system.

Description

technical field [0001] The invention relates to a hydrothermal treatment device and method for waste plastics, in particular to a device and a treatment method for hydrolyzing waste plastics after being partially oxidized under high temperature and high pressure conditions, and belongs to the field of environmental protection. Background technique [0002] Due to its excellent performance, polymer plastics are widely used to replace traditional materials such as metal, wood, paper, ceramics, etc., and are used in various fields of national economy and production and life. At present, the volumetric output of plastics in the world has greatly surpassed that of steel, becoming one of the main types of materials. my country is a big country in the production and consumption of plastics, and its apparent consumption ranks second in the world, with an average annual growth rate of 12.3%. With the wide application of plastic products, the generated waste plastics have brought ser...

Claims

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Application Information

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IPC IPC(8): C08J11/14C08L101/00
CPCC08J11/14C08J2300/30Y02W30/62
Inventor 王光伟陈鸿珍李友凤林锦良谢波
Owner ZUNYI NORMAL COLLEGE
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