METHOD OF THERMAL DESTRUCTION OF WASTE FROM POLYETHYLENE AND POLYPROPYLENE Russian patent published in 2017 - IPC C10B53/00 C10B53/07 

FIELD: technological processes.

SUBSTANCE: in the batch mode, no less than two thermal destruction reactors 1 are used alternately. A firebox 2 with a fuel burner 3 is made mobile. After disconnecting the hot furnace from the thermal destruction reactor, the latter is put into a cooling mode. Simultaneously, another hot furnace is added to the second cold thermal decomposition reactor. Provide for preheating and maintaining the temperature in the reboiler of the hydrocarbon cube 7 and in the boiler of the cube of the distillation column 15. The supply of fuel gas is stopped when the temperature in the collection cube is reached 300-360°C. In the cube of the distillation column, a temperature of 160-220°C is maintained. The separation or fractionation of liquid components from the vapor-gas mixture of hydrocarbons is carried out in four stages. In the first stage, high-boiling components of the vapor-gas mixture are condensed in a water-cooled heat exchanger at a temperature of 300-360°C. In a second step, the paraffins in the column serving as the dewaxer 8 are condensed at a temperature of 180-300°C. The condensed high-boiling hydrocarbons and paraffins are kept in a collecting cube at a temperature of 300-360°C. In a third step, fractions of gasoline and diesel fuel are separated in the distillation column at a temperature in its upper part of 35-100°C, and in the lower part 160-220°C. In the fourth stage, a pair of gasoline and water is condensed in a heat exchanger 18 at a temperature of 20-35°C. Use the catalyst in the form of strips of titanium, twisted in a spiral in one or in different directions. Titanium strips are placed in a collecting cube, in the tubes of a heat exchanger, in which the high-boiling components of the gas-vapor mixture condense, in the tubes of the de-wax de-slurry and in the tubes of the reflux condenser of the distillation column.

EFFECT: improving the quality and increasing the yield of finished processed products.

14 cl, 8 dwg, 2 tbl, 1 ex