Method and device for thermal-chemical processing and exploitation of substances containing carbon

摘要

The method for thermal-chemical utilization of carbon-containing substances, comprises supplying and pyrolyzing the carbon-containing substances in first step, gasifying the pyrolysis coke (D) from the first step containing pyrolysis coke and pyrolysis gas (E), removing slag and other residues, and converting synthesis gas (S) into hydrocarbons and/or other products in third step, where the hydrocarbons and/or other residues are discharged. The excess return gas is guided from the third step into the first step and/or the second step. The method for thermal-chemical utilization of carbon-containing substances, comprises supplying and pyrolyzing the carbon-containing substances in first step, gasifying the pyrolysis coke (D) from the first step containing pyrolysis coke and pyrolysis gas (E), removing slag and other residues, and converting synthesis gas (S) into hydrocarbons and/or other products in third step, where the hydrocarbons and/or other residues are discharged. The excess return gas is guided from the third step into the first step and/or the second step, and the third step forms a closed circuit. A pressure gradient is present along the circulation. The supply of heat energy is carried out for the pyrolysis in the first step partially or completely by recirculating a portion of the hot synthesis gas from the second step into the first step and/or by partial oxidation of the raw material and the resulting pyrolysis coke. The first step is carried out at 500-600[deg] C. In the second step, oxygen and/or water vapor and/or carbon dioxide is used as gasification agent for the gasification reaction. A thermal energy is partially or completely supplied outside for gasification reaction in second step through heating device and/or heat exchanger and/or through oxidation. A part of the pyrolysis coke is produced with oxygen. The second step is carried out at 850-1000[deg] C. The first step and/or the second step is carried out at a pressure of 10-25 bar. The first step and/or the second step is carried out at same pressure reactor (36). The conversion is carried out in third step with a Fischer-Tropsch synthesis or liquid-phase methanol synthesis. Independent claims are included for (1) a system for thermal-chemical utilization of carbon-containing substances; and (2) a hydrocarbon and other product.