Production of pyrolysis gas which is almost free from condensate and dust comprises heating, drying, hydrolyzing and pyrolyzing biogenic starting materials

摘要

Production of a pyrolysis gas which is almost free from condensate and dust comprises heating, drying, hydrolyzing and pyrolyzing biogenic starting materials. The heating speed is less than 1 K/minute. Preferred Features: The pyrolysis is carried out discontinuously or continuously and the pyrolysis products are fed through a bed of the biogenic starting materials. Different reaction gases and storage vessels are joined together on the gas side. A part of the solid pyrolysis products is gasified in a subsequent process. The gaseous products from the pyrolysis and gasification are used singly or together in a mixture for recovering heat energy and mechanical energy. The pyrolysis process is carried out at 250-500 deg C and parts of the heat produced are used for external heating purposes. The starting materials are used in the dry state.