METHOD FOR FIRE CLEANING OF PROCESS EQUIPMENT Russian patent published in 2016 - IPC F23G5/27 B08B7/00 B01D53/72 

FIELD: chemistry.

SUBSTANCE: present invention relates to chemical industry, namely, to cleaning of process equipment made from row and alloyed steels, from polymer deposits and emulsion rubber by thermal decomposition. Method involves non-oxidising heating of equipment and thermal decomposition of polymers in a reactor by products of natural gas and pyrolysis gas combustion with further decontamination of gases and carbon before discharge into the atmosphere by means of their combustion in a cyclone furnace with a preliminary stage of thermal decomposition of high-molecular polyaromatic hydrocarbons (PAHs) into low-molecular polyaromatic hydrocarbons by a high-speed burner with the flame temperature of 1,700-2,000 °C in the antechamber of a cyclone furnace, heating of equipment is performed by high-speed heat transfer medium flow in a downward direction by means of circulation circuit,while additional air is introduced into the excess heat-transfer medium discharge after the cyclone furnace. Fire cleaning of equipment is carried out at the heat transfer medium temperature of 650 °C, and in the temperature range between 400-550 °C in order to avoid valley separation of pyrolysis gas heating is carried out at a rate of 10-15 °C/h.

EFFECT: longer service life of process equipment, reduced contamination of the environment.

3 cl, 1 dwg, 1 tbl