Patent ID: 6298651
Filing Date: 2001-10-09
Classification: F01K,F02C,Y02E,Y02T

Abstract:
A power generation method comprising the steps of:separating a boiler-oriented fuel (F) into a distillate (D) and a residue (R) by performing partial processing of the boiler-oriented fuel (F);adopting a fuel for a gas turbine (G) obtained from the distillate singly, or a mixture of the fuel for a gas turbine (G) and a gas-turbine-oriented fuel (G') as a gas turbine fuel (A);adopting the residue (R) singly, or a mixture of the residue (R) and at least one fuel selected from the group consisting of a boiler-oriented fuel (F) and another kind of boiler-oriented fuel (F') as a boiler fuel (B);generating electric power by driving a steam turbine which is driven by steam produced by burning the gas turbine fuel (A) in the gas turbine; andgenerating electric power by driving a steam turbine which is driven by steam produced by burning the boiler fuel (B) in a boiler,wherein the boiler-oriented fuel (F or F') is a fuel selected from the group consisting of coal, poorly graded coal whose volatile matter is not less than 20% by weight, char, coke, fuel oil, residual oil, pitch, bitumen, petroleum coke, carbon, tar sand, sand oil obtained from tar sand, oil shale, shale oil obtained from oil shale, Orinoco tar, orimulsion which is an aqueous suspension of Orinoco tar, asphalt, emulsified asphalt, petroleum-oil mixture (COM), coal-water mixture (CWM), coal-methanol slurry, mass resulted from naturally occurring substances, waste plastic, combustible refuse, and a mixture of these substances;wherein at least a gas component (V) and an oil component (O) are separated from the distillate (D), and wherein the gas component (V), the oil component (O) or both of the gas component (V) and the oil component (O) is used as the fuel for a gas turbine (G);wherein the oil component (O) is separated into a refined distillate (C) and a distillate residue (R') by distilling the oil component (O), wherein the refined distillate (C) is used as the fuel for a gas turbine (G), and wherein the distilled residue (R') is used in the boiler; andwherein the gas component (V) is burned by a gas turbine for burning gas, and wherein the oil component (O) or the refined distillate (C) is burned by a gas turbine for burning oil.