METHOD FOR COMPLEX PROCESSING OF RUBBER WASTE Russian patent published in 2022 - IPC B29B17/00 F23G7/12 C08J11/00 

FIELD: waste treatment.

SUBSTANCE: invention relates to the field of rubber waste (RW) processing with an integrated approach of the pyrolysis process and can be used in the processing of industrial hydrocarbon solid waste for various purposes. The method for complex logical processing is carried out in a mine-type reactor by heating crushed rubber in the form of granules with a heating rate of 9-12.5°C/min to a temperature of 550-700°C with no air access and maintaining this temperature until the end of the release of volatile substances, a methane-hydrogen gas mixture with a content of these components up to 90-95% is formed, which can be divided into pure components by the membrane technology method and/or used in the future at modular hydrogen and methane filling stations, and also partially used as fuel to maintain the endothermic pyrolysis process. The methane-hydrogen mixture can be used, preferably, for the production of electricity in a gas turbine or gas piston installation. The process of heat supply is carried out using the allothermal method through the reactor wall. During pyrolysis, flue gas with a temperature of 900-950°C is used to heat the reactor when burning part of the methane-hydrogen mixture. In the condensed phase of heavy hydrocarbons of the C₅-C₁₂ pyrolysis process, valuable substances are present in a significant amount, for example, D-Limonene, o-Cymene, etc., which are isolated by distillation as high-margin products. The heavy fraction of hydrocarbons remaining after distillation with a boiling point above 200°C can be used to produce flue gases with a temperature of 1100-1200°C sent to the reactor heating jacket to maintain the temperature of the solid carbon residue activation process by carbon dioxide gasification at a temperature from 940 to 1000°C in order to obtain carbon sorbents for various purposes. During carbon dioxide gasification, carbon monoxide (II) is formed, which is sent for the production of carbamide or for catalytic steam conversion to produce hydrogen and carbon monoxide (IV). When the resulting gas mixture is cooled, CO₂ is converted to a liquid state and sent to the receiver, and hydrogen is used at modular automobile filling stations. Liquid carbon dioxide is sent to the recycle for carbon dioxide gasification.

EFFECT: improving the quality of the solid residue, reducing emission of pollutants.

1 cl, 1 dwg