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Energy-saving and environment-friendly process using twin-screw extrusion method to produce reclaimed rubber

A twin-screw extrusion and twin-screw extruder technology, which is applied in the field of reclaimed rubber production by twin-screw extrusion method, can solve the problems of pollution and waste gas, and achieve the effect of good appearance, good regeneration effect and promoting the extrusion process.

Inactive Publication Date: 2018-04-17
MAANSHAN ZHONGCHUANG ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

Effectively solve the problem of exhaust gas and pollution

Method used

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  • Energy-saving and environment-friendly process using twin-screw extrusion method to produce reclaimed rubber

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Embodiment 1

[0022] An energy-saving and environment-friendly twin-screw extrusion process for producing reclaimed rubber, the specific process is:

[0023] (1) the waste rubber is crushed and pulverized by the rubber front-stage crushing equipment to obtain a particle size of 20-40 mesh rubber powder;

[0024] (2) The rubber powder is transported to a twin-screw extruder through a quantitative feeder, wherein the twin-screw extruder adopts a long screw design, and the aspect ratio of the screw is 12-14;

[0025] (3) Use special injection equipment to keep CO2 injected into the twin-screw extruder in a supercritical state, where the temperature of the injection equipment is greater than 32°C and the pressure is greater than 8MPa. The twin-screw extruder is divided into a conveying section and a In the extrusion section, supercritical CO2 is injected into the extrusion section of the screw. The critical temperature of supercritical CO2 is 31.26°C and the critical pressure is 7.4MPa. Supercr...

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Abstract

The invention discloses an energy-saving and environment-friendly process using a twin-screw extrusion method to produce reclaimed rubber. The process specifically includes: using a rubber forepart crushing equipment to crush and grind waste rubber into rubber powder; using a constant weight feeder to feed the rubber powder to a twin-screw extruder; injecting supercritical CO2 into the extruder toallow the supercritical CO2 to swell and vulcanize the rubber under certain temperature and normal pressure, using twin-screw mechanical shearing to achieve fast desulfurization and regeneration of the waste rubber, and extruding from the head of extruder to obtain the reclaimed rubber. The energy-saving and environment-friendly process has the advantages that the supercritical CO2 is injected during production to enhance the mass transfer and heat transfer ability of a medium and promote the extrusion process, the reclaimed rubber is good in appearance and small in odor, decomposition products can be taken away to achieve a purification and exhaust effect, the problems of waste gas and pollution are solved effectively, and a good regeneration effect is achieved.

Description

technical field [0001] The invention belongs to the field of environment-friendly reclaimed rubber, and relates to an energy-saving and environment-friendly process for producing reclaimed rubber by twin-screw extrusion. Background technique [0002] Tire rubber regeneration methods are divided into physical methods, chemical methods and biological methods. Physical regeneration includes microwave regeneration, infrared regeneration and ultrasonic regeneration; chemical methods include oil and water oil, double-helix high-temperature atmospheric pressure desulfurization regeneration. The key issue restricting the development of reclaimed rubber enterprises is pollution: the environmental protection of reclaimed rubber products and the production process. [0003] At present, the domestic relatively mature desulfurization method "high temperature and high pressure dynamic desulfurization regeneration", the reclaimed rubber produced has better performance, but consumes a lot o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/10C08L17/00
CPCC08J11/10C08J2317/00Y02P20/143Y02P20/54Y02W30/62
Inventor 陈婉芳孙敏徐执海
Owner MAANSHAN ZHONGCHUANG ENVIRONMENTAL PROTECTION TECH CO LTD
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