Patent ID: 6251148
Filing Date: 2001-06-26
Classification: C10J,C10K

Abstract:
A process for preparing a synthetic gas from hydrocarbon containing material by utilizing a thermal pretreatment operation and a gasifier, said hydrocarbon containing material comprising solid or pasty residues or wastes that are difficult to handle and which residues or wastes include organic compounds, said process including the steps of:(a) passing said hydrocarbon containing material through said thermal pre-treatment operation which includes a heated rotary tube to produce a gas fraction and a non-gas fraction, said thermal pretreatment operation subjecting said hydrocarbon containing material to sufficient heat in a controlled atmosphere to form said gas and said non-gas fractions without substantially causing combustion of said fractions, said controlled atmosphere being substantially oxygen free;(b) feeding at least a portion of said non-gas fraction into an entrainment gasifier;(c) gasifying said at least a portion of said non-gas fraction in said entrainment gasifier under sub-stoichiometric conditions and at temperatures of at least about 800.degree. C. to substantially reduce oxide formation and to produce a product gas; and(d) using at least a portion of said product gas in a process selected from the group consisting of an energy supply for said entrainment gasifier, an energy supply for said thermal pretreatment operation, an energy supply for a scrubber, an energy supply for gas powered machinery and combinations thereof.