METHOD OF UTILIZATION AND PROCESSING OF FLUE GASES AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2025 - IPC B01D53/62 

FIELD: heat power engineering.

SUBSTANCE: group of inventions can be used in cleaning and recycling flue gases of heat power plants. Device for utilization and processing of furnace flue gases contains a synthesis gas reactor connected by a smoke duct to the furnace smoke exhauster. Device additionally contains series-connected heat exchanger-recuperator, air cooling apparatus, two-phase gravity separator of centrifugal type, compressor, tubular catalytic reactor for synthesis of hydrocarbons, refrigerator-separator with jacket. Heat exchanger-recuperator is connected to the synthesis gas reactor and the furnace smoke exhauster. Method for recycling and processing flue gases, in which flue gases are mixed with methane or natural gas at ratio of 2:1 and fed into a synthesis gas reactor, where methane is converted to synthesis gas at temperature of +750–950 °C and pressure of 1–5 bar. Flue gases are heated in a heat exchanger-recuperator to a temperature of +400–700 °C before feeding synthesis gas into the reactor by heat of hot synthesis gas from the synthesis gas reactor. Additional volume of a mixture of methane or natural gas with air is burnt in a synthesis gas reactor to obtain a ratio of CO:H2 in the synthesis gas equal to 1:1. Synthesis gas in air cooling apparatus is cooled to temperature of +30–40 °C, thereafter, condensate is separated from the flow of synthesis gas in a two-phase gravity separator of centrifugal type. Dehydrated synthesis gas is compressed by a compressor to pressure of 20–30 bar and fed into a tubular catalytic reactor for synthesis of hydrocarbons with a temperature of +140–170 °C. In a tubular catalytic reactor for synthesis of hydrocarbons on an iron catalyst at a temperature of +200–300 °C, dimethyl ether is synthesized, which is fed from the reactor into a refrigerator-separator with a jacket, where it is cooled by a coolant to a condensation temperature and removed from the separator.

EFFECT: group of inventions ensures reduction of flue gas emissions, increase of economic efficiency of the flue gas utilization and processing process, expansion of the range of technical means.

2 cl, 1 dwg, 1 ex