Power plants – Combustion products used as motive fluid
Reexamination Certificate
2000-03-21
2001-05-01
Casaregola, Louis J. (Department: 3746)
Power plants
Combustion products used as motive fluid
C060S039182, C060S039463
Reexamination Certificate
active
06223522
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a high-efficiency power generation method and a high-efficiency power generation system, which use a heavy oil component and a light oil component as a fuel.
Conventionally, a heavy oil component such as tar pitch, Orinoco tar, or residue oil is unsuitable as a gas turbine fuel, so that it has found limited use in power generation of boiler/steam turbine system. Therefore, it is difficult to use a heavy oil component for a power generation system with high thermal efficiency such as a full fired heat recovery power plant in which a gas turbine and a boiler/steam turbine system are combined.
From the viewpoint of resource saving, it has been desired that such a fuel be capable of being used for a high-efficiency power generation system such as a full fired heat recovery power plant.
SUMMARY OF THE INVENTION
The present invention has been accomplished in view of the above situation, and an object thereof is to provide a high-efficiency power generation method and a high-efficiency power generation system, in which a heavy oil component with high kinematic viscosity such as tar pitch, Orinoco tar, or residue oil can be transported to a power plant and can be used for a high-efficiency power generation apparatus such as a full fired heat recovery power plant.
Thus, in accordance with the present invention there is provided a high-efficient power generation method in which a light oil component is mixed with a heavy oil component so that the kinematic viscosity is not higher than 800 centistokes, the light oil component and the heavy oil component are separated from each other after the mixed oil is transported to a power generation apparatus, and power generation is carried out by burning the light oil component by means of a gas turbine in the power generation apparatus and by burning the heavy oil component by means of a boiler in the power generation apparatus. In this high-efficiency power generation method, a full fired heat recovery system can be used in which exhaust gas from a gas turbine is used as combustion air for a boiler.
Also, a high-efficiency power generation system in accordance with the present invention comprises a mixing apparatus for mixing a light oil component with a heavy oil component, transportation means for transporting a mixed oil mixed by the mixing apparatus to a power generation apparatus, a separation apparatus for separating the transported mixed oil into a light oil component and a heavy oil component, a gas turbine for burning the separated light oil component and thereby for generating power, and a boiler for generating steam used to burn the separated heavy oil component and thereby to generate power.
Accordingly, the present invention provides a high-efficiency power generation method and a high-efficiency power generation system, in which a heavy oil component such as tar pitch, Orinoco tar, or residue oil can be used for a high-efficiency power generation apparatus such as a full fired heat recovery power plant.
REFERENCES:
patent: 2681694 (1954-06-01), Loft
patent: 5052175 (1991-10-01), Brueckner et al.
patent: 7-208111 (1995-08-01), None
Hyakutake Yoshinori
Iijima Masaki
Kobayashi Kazuto
Moriwaki Masahumi
Shibata Masatoshi
Anderson Kill & Olick P.C.
Casaregola Louis J.
Mitsubishi Heavy Industries Ltd.
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