FIELD: process engineering.
SUBSTANCE: invention may be used in chemical industry. Carbon dioxide-bearing waste gas is directed in counter stream through several zones (4, 3, 2, 1) to flow of solid non-gasified loose material and thermally degradable organic matter up to pressure equalisation zone to get converted into pyrolised gas. Organic matter is thermally decomposed at first stage 1 at 250-700°C in conditions of reduction into hydrocarbons with short chains, hydrogen and carbon monoxide to produce coke and residue. At intermediate 2, coke is decomposed at increasing temperature. Note here that carbon dioxide formed is sucked off counted stream of solid matter in direction of combustible gas production stage 1. At stage 3 of carbon dioxide formation at 800-1600°C coke residues and carbon dioxide are converted into carbon oxide at pressure and temperature set according to Boudouard equilibrium. At cooling stage 4, solid residues and lumpy loose material is cooled in counter stream of CO2 to below 100°C and discharged. Discharged loose material is returned into circulation circuit.
EFFECT: notable reduction in consumption of fossil fuel.
2 cl, 1 dwg, 9 tbl
