METHOD FOR DESTRUCTIVE DISTILLATION OF POLYETHYLENE AND POLYPROPYLENE WASTES AND DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2020 - IPC C08J11/04 C10B53/00 C10G1/02 

FIELD: removal and processing of solid wastes.

SUBSTANCE: invention relates to methods of processing industrial and domestic wastes from synthetic and polymer materials. Described is a method for destructive distillation of polyethylene and polypropylene wastes, involving loading destructive distillation into the first reactor of polyethylene and polypropylene wastes purged from flotation from impurities containing polyvinylchloride, polyethylene terephthalate, cellulose, organic compounds, rubber; connection and heating of furnace of first destructive distillation reactor with fuel burner; heating and maintaining temperature in the hydrocarbon collector cube with waste gases, wherein maintaining the temperature in the dewaxing agent hydrocarbon collection cube is effected by disconnection and connection of the waste gas supply to the boiler; controlling the temperature of the output of the vapor-gas mixture of hydrocarbons from the dewaxing agent by feeding cooling system water into the dewaxing agent dephlegmator, collecting paraffin fractions; fractionation of remaining destructive distillation products in a rectification column to obtain a vapor phase of the gasoline fraction and a liquid phase of the diesel fraction, controlling the temperature of leaving the remaining vapor-gas mixture from the rectification column by feeding cooling system water to the refluxer of the rectification column; cooling of remaining vapor-gas mixture in column of continuously operating heat exchanger, its separation into gasoline and gas fractions; loading of material into the next destructive distillation reactor; switching off fuel supply to first reactor burner; lowering of the first reactor furnace and its cooling, connection of the next furnace combustor and its heating with a fuel burner; unloading solid carbon residue from cooled destructive distillation reactors, wherein before loading of raw material bottom part of each reactor is coated with anti-burning lubricant layer; connection of reactor combustors is carried out using air cushions, loading of reactors employs a vacuum, in several stages along the cycle: "reactor loading with raw material, vacuumization of loaded reactor volume, heating of reactor to 110–260 °C for liquefaction of loaded material" until liquefied with raw material marks of 0.7 of height of full reactor loading; after transition of loaded first reactor into operating mode of destructive distillation, loading of the next reactor is performed in several stages along the same cycle "reactor loading with raw material, vacuumization of loaded volume of reactor, heating of reactor to 110–260 °C for liquefaction of loaded material "until liquefied with raw material marks of 0.7 of altitude of full load of next reactor; cooling of reactors is performed by supply of carbon dioxide; cleaning through the lower side hatch of the cooled reactor is carried out with an industrial sand blaster or a vacuum cleaner; reduced temperature of exhaust gases discharged into atmosphere is carried out by passing them through boilers. Described also is a device for destructive distillation of polyethylene and polypropylene wastes.

EFFECT: technical result is higher efficiency and productivity of destructive distillation of wastes from synthetic and polymer materials.

11 cl, 2 dwg