Process method and device for producing oil by pyrolysis of high-molecular polymerization waste
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A technology for polymer polymerization and a process method, which is applied in the field of a polymer polymerization waste pyrolysis oil-making process method and a pyrolysis oil-making device field to achieve the effects of reducing feed blockage, improving heat transfer efficiency, and avoiding coking phenomenon.
Pending Publication Date: 2021-07-16
渭沣洁净技术(上海)有限公司 +1
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[0011] Aiming at the deficiencies of the prior art, the present invention provides a method and device for pyrolyzing polymeric waste to oil, which has the advantages of strong overall practicability, and solves the problems of domestic and foreign treatment technologies for high-molecular polymeric waste. defect problem
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[0068] 1. Raw materials: Waste plastics recovered from landfill waste through multi-stage sorting, mainly waste plastics with a small amount of soil, are crushed into irregular small pieces by a crusher. Waste plastics mainly come from packaging waste, automobile waste and processing waste. The percentages of various types of waste plastics are low-density polyethylene (LDPE), 27%; high-density polyethylene (HDPE), 21%, polypropylene (PP ), 18%; polystyrene (PS), 16%; polyvinyl chloride (PVC), 7%.
[0069] 2. Analysis of pyrolysis products: Use the above-mentioned polymer polymer waste pyrolysis oil production process and equipment to carry out pyrolysis oil production, collect crude oil and pyrolysis gas products (gas collection bag sampling), and use ethyl acetate to clean The condenser obtains the cleaning liquid, and then the cleaning liquid is subjected to centrifugal rotary evaporation, and finally the residual liquid of the rotary evaporation is dissolved in tetrahydrof...
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Abstract
The invention discloses a process method and device for producing oil by pyrolysis of high-molecular polymerization waste. The process method comprises the following steps of extruding the high-molecular polymerization waste through an extruder, mixing the extruded high-molecular polymerization waste with a bed material, feeding the mixture into a fixed bed pyrolysis reactor, carrying out pyrolysis reaction, removing fly ash from the generated high-temperature oil gas through a cyclone separator, and carrying out heat exchange with nitrogen, then entering a waste heat boiler to recover heat energy, carrying out gas-liquid separation, feeding liquid into a crude oil tank to be stored, and further condensing gas to obtain crude oil, combusting fuel in the inert gas generator to generate oxygen-deficient hot air which is fed into the fixed bed pyrolysis reactor to be in full contact with the mixture, and providing heat for the pyrolysis reaction, and cooling and screening the waste residue, and recycling the bed material for reutilization. The high-molecular polymerization waste is dechlorinated and deacidified after being extruded, so that the problem of corrosivity of a reaction system caused by chlorine and acid gas generated by pyrolysis is solved, the pyrolysis temperature in the reactor is ensured by adopting a multi-section heat supply mode, and the problems of poor heat conductivity and non-uniform reaction heating of the high-molecular polymerization waste are solved.
Description
technical field [0001] The invention relates to the technical field of polymer waste treatment, in particular to a process method and a pyrolysis oil production device of polymer polymer waste pyrolysis. Background technique [0002] High molecular polymers are widely used in our daily life, such as polyethylene terephthalate (PETE), which is usually used to make soft drink bottles, such as mineral water bottles and juice bottles, etc., high-density polyethylene (HDPE), Used to make milk bottles, shower gel bottles and detergent bottles, etc., polyvinyl chloride, used to make candy and fruit trays, plastic packaging and food preservation films, etc., low-density polyethylene (LDPE), used to make some bottles, Shopping bags and high-strength bags and some other packaging films, polypropylene (PP), used to make home appliances, luggage, toys and some lining and outer edge structures of vehicles, polystyrene (PS), mainly used to make toys , rigid packaging and cosmetic bags, e...
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