FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: proposed device combined with exhaust duct contains soot separator with axial swirler, first cooler with axial swirler, water sprayer(s) and surface heat exchanger, first separator with axial swirler, first cooler with axial swirler, water sprayer(s) and surface heat exchanger, first separator with axial or auger swirler. To increase absorption of harmful matter, rise temperature of condensing of water vapors, reduce velocity of gases in exhaust duct and decrease dimensions of said devices, gas pressure before said devices is increased by gas charge set into operation by steam turbine, or electric motor, or piston engine. Turbo expander is installed after first separator to utilize energy of exhaust gases. Said turbo expander drives air compressor or electric generator. Second separator with axial or auger swirler is connected to outlet gas pipe of turbo expander. Second separator is connected with second cooler containing surface heat exchanger. Soot is separated in soot separator and is fed for combustion into combustion chamber along pipeline. Absorption of nitrogen, sulfur and carbon oxides is carried out in first separator at decrease of temperature of gases and increase of gas pressure, separated hot water being delivered into hot part of water accumulator. Second separator is used both for absorption of nitrogen, sulfur and carbon oxides by water and for condensing of heavy hydrocarbons owing to considerable decrease of gas temperature in turbo expander before said separator. Cold water, thus formed, is drained into cold part of water accumulator. To get cold carrier, water is cooled in said part of accumulator by circulation through surface heat exchanger of second cooler. Cold combustion products are used in said heat exchanger for cooling water. Noise of exhaust gases is reduced both by reducing velocity of gases owing to their cooling and passage of gases from soot separator into first and second coolers and separators being essentially resonance chambers. Laminated packs of woven gauzes in separators with auger swirlers are periodically cleaned from contamination both manually and automatically. EFFECT: simple design, reliable operation at any loads, possibility of cleaning combustion products from harmful matter and provision of environmental protection. 36 cl, 3 dwg
