Fuel gas production from e.g. organic waste matter in two stage process

摘要

The new process produces fuel gas from organic materials, especially wood and other biomass. These are pyrolysed, producing low temperature carbonisation gas It contains hydrocarbons, tar and water vapour removed with thermal decomposition. The residue is a char containing inorganic matter. The resultant gas is burned rich, at temperatures of 1200 deg C and above. Resultant hot gas is used to gasify the char, producing dust-laden synthesis gas, which is then cleaned. Novel features include removal of the low temperature carbonisation gas with minimal dust loading. Its subsequent combustion is only partial, under conditions of imposed vorticity. Also claimed is a plant to carry out the process described.