METHOD FOR PURIFYING AND DESTROYING GASES Russian patent published in 2022 - IPC F23G5/16 F22B25/00 

FIELD: gas treatment.

SUBSTANCE: invention relates to the field of purification of gases generated in the process of disposal of industrial and/or municipal waste; namely, to decontamination of flue gases resulting from burning organic household and industrial waste at temperatures above 1,000°C. The invention can be used in any industry mainly as an element of technology-related safety of waste incineration and recycling plants. Method for purifying and destroying gases is characterised by subjecting the gas flow to plasma chemical and gas dynamic effects, heating the gas, creating convection flows, and purifying the gas from microparticles. The gas is processed by a plasma jet generated by microwave radiation. The gas herein is consistently quickly passed into the "hot" plasma region where plasma chemical reactions are realised, and enters the "cold" region, ensuring the quenching of the products of plasma chemical reactions and the discharge of the processed products. Method includes incineration of waste in a reactor with an oxidiser present in the form of air from the cooling system at a temperature from 15 to 350°C, supplying fuel to the near-grate zone for mixing with the oxidiser. Thermal heating to temperatures of 900 to 1,400°C of the gas resulting from the combustion of waste. Creation of vortex flows of the gas resulting from the combustion of fuel in a vortex tube with a rotation of the gas flow by 30° in a horizontal plane relative to the reactor wall with an oxidiser flow rate from 0.1 to 1.2 kg/s. Acoustic resonant excitation of vortex flows of the gas resulting from the combustion of fuel. After the acoustic resonant excitation of vortex flows of the gas resulting from the combustion of fuel, the gas is held at a temperature from 900 to 1,400°C for at least 2 seconds at a pressure not above the atmospheric pressure. The gas is then cooled to a temperature not greater than 100°C for no more than 0.6 s at a pressure not above the atmospheric pressure.

EFFECT: increase in the degree of purification and destruction of gases up to 99%; an increase in the processability; simplification of the method for purifying and destroying gases; increase in the environmental sustainability of the method due to the ensured complete combustion of gases; expansion of the scope of functional capabilities of the method due to the enabled application thereof for purifying and destroying gases of any chemical composition and origin; increase in the reliability of the method.

5 cl, 2 ex, 2 tbl