초록 ▼

A light portion is extracted from feed oil by a separation system. The light portion is then subject to a hydrotreatment to obtain impurity-removed fuel oil which is stored in an intermediate tank. A residue of the feed oil after extraction of the light portion is gasified to obtain syngas (H2 gas+C

A light portion is extracted from feed oil by a separation system. The light portion is then subject to a hydrotreatment to obtain impurity-removed fuel oil which is stored in an intermediate tank. A residue of the feed oil after extraction of the light portion is gasified to obtain syngas (H2 gas+CO gas) which is used as basic fuel for power generation in a power generation system. The fuel oil is fed to the power generation system as auxiliary fuel for supplementing the power generation based on the syngas. The power generation system includes a plurality of gas turbines and generators. The number of the gas turbines to be driven by the fuel oil is controlled to adjust the power generation amount depending on demand.

대표청구항 ▼

1. An oil fuel burning integrated combined cycle power generation system comprising:a fuel producing system comprising a separation means for separating feed oil composed of a crude oil and/or heavy oil into a light portion and a heavy portion, and a refining means for refining the light portion to

1. An oil fuel burning integrated combined cycle power generation system comprising:a fuel producing system comprising a separation means for separating feed oil composed of a crude oil and/or heavy oil into a light portion and a heavy portion, and a refining means for refining the light portion to obtain fuel oil;a gasification system for gasifying the heavy portion to produce syngas containing hydrogen gas and carbon monoxide gas;a gas turbine power generation system for driving a gas turbine using the fuel oil and the syngas as fuel to carry out power generation; anda steam turbine power generation system for driving a steam turbine using steam produced by heat recovered from exhaust gas of the gas turbine to carry out power generation. 2. The oil fuel burning integrated combined cycle power generation system according to claim 1, wherein the fuel producing system comprises a tank for storing the fuel oil, and the gas turbine power generation system requires a constant supply of the syngas from the gasification system as basic fuel and further requires a supply of the fuel oil from the tank as auxiliary fuel for adjusting a power generation amount depending on power demand. 3. The oil fuel burning integrated combined cycle power generation system according to claim 1, wherein the separation means comprises a distillation means and a solvent deasphalting means, and wherein the refining means comprises a hydrotreating unit for refining the light portion to satisfy a gas turbine fuel specification. 4. The oil fuel burning integrated combined cycle power generation system according to claim 1, wherein the gas turbine power generation system comprises a compressor connected to the gas turbine for producing compressed air to be fed to a combustor of the gas turbine, and wherein the gasification system carries out partial oxidation of the heavy portion using the compressed air fed from the compressor. 5. The oil fuel burning integrated combined cycle power generation system according to claim 1, further comprising an oxygen separation unit provided between the gas turbine power generation system and the gasification system, wherein the gas turbine power generation system comprises a compressor connected to the gas turbine for producing compressed air to be fed to a combustor of the gas turbine, wherein the oxygen separation unit carries out low-temperature separation of oxygen from part of the compressed air fed from the compressor, and wherein the gasification system carries out partial oxidation of the heavy portion using oxygen fed from the oxygen separation unit. 6. The oil fuel burning integrated combined cycle power generation system according to claim 1, further comprising an oxygen producing unit for separating oxygen from air using a pressure swing adsorption method, wherein the gasification system carries out partial oxidation of the heavy portion using oxygen fed from the oxygen producing unit. 7. The oil fuel burning integrated combined cycle power generation system according to claim 1, wherein the separation means comprises a distillation means and a solvent deasphalting means, wherein the heavy portion fed to the gasification system is a residue separated by the solvent deasphalting means from a heavy portion of the feed oil obtained by the distillation means, and wherein the residue is uniformly dispersed into water and fed to the gasification system as water slurry fuel. 8. The oil fuel burning integrated combined cycle power generation system according to claim 1, wherein the gas turbine power generation system has a power generation capacity which is greater than a power generation amount obtainable by using all the amount of the syngas produced in the gasification system. 9. The oil fuel burning integrated combined cycle power generation system according to claim 1, wherein the gas turbine power generation system carries out mixed combustion of the fuel oil in a liquid phase and the syngas in a gaseous phase. 10. The oil fuel burning integrated combined cycle power generation system according to claim 1, wherein the gas turbine power generation system comprises a plurality of gas turbines including the gas turbines each driven by the syngas and the gas turbines each driven by the fuel oil. 11. The oil fuel burning integrated combined cycle power generation system according to claim 10, wherein the syngas is constantly fed to the corresponding gas turbines as basic fuel, while the fuel oil is fed to the corresponding gas turbines as auxiliary fuel for adjusting a power generation amount depending on power demand. 12. An oil fuel burning integrated combined cycle power generation method comprising:a fuel producing step of separating essentially all the amount of feed oil composed of a crude oil and/or heavy oil into a light portion satisfying a gas turbine fuel specification and a heavy portion being a residue of the feed oil after separation of the light portion therefrom;a gasification step of gasifying essentially all the amount of the heavy portion through partial oxidation to produce syngas containing hydrogen gas and carbon monoxide gas;a gas turbine power generation step of carrying out power generation based on essentially all the amount of the syngas supplied as basic fuel and further based on the light portion supplied as auxiliary fuel for adjusting a power generation amount depending on power demand; anda steam turbine power generation step of carrying out power generation using steam produced by high-temperature exhaust gas obtained in the gas turbine power generation step. 13. The oil fuel burning integrated combined cycle power generation method according to claim 12, wherein the gasification step disperses the heavy portion into water uniformly to form water slurry fuel when the heavy portion obtained in the fuel producing step has a softening point higher than 140° C., and then gasifies the water slurry fuel to produce the syngas, wherein the gasification step forms the heavy portion into emulsion fuel when the softening point is higher than 110° C. and no higher than 140° C., and then gasifies the emulsion fuel to produce the syngas, and wherein the gasification step keeps the heavy portion as it is in a high-temperature state when the softening point is no higher than 110° C., and then gasifies the heavy portion to produce the syngas. 14. The oil fuel burning integrated combined cycle power generation method according to claim 12, wherein the fuel producing step comprises a distillation separating step, a solvent deasphalting separation step and a refining step for refining through a hydrotreatment the light portion obtained through the distillation separating step and the solvent deasphalting separation step. 15. The oil fuel burning integrated combined cycle power generation method according to claim 12, wherein the gasification step uses compressed air produced in the gas turbine power generation step to carry out the partial oxidation. 16. The oil fuel burning integrated combined cycle power generation method according to claim 12, further comprising the step of producing oxygen through low-temperature separation from compressed air produced in the gas turbine power generation step, wherein the gasification step carries out the partial oxidation using the produced oxygen. 17. The oil fuel burning integrated combined cycle power generation method according to claim 12, further comprising the step of producing oxygen using a pressure swing adsorption method, wherein the gasification step carries out the partial oxidation using the produced oxygen. 18. The oil fuel burning integrated combined cycle power generation method according to claim 12, wherein the fuel producing step comprises a distillation separating step of separating the feed oil into a first light portion and a first heavy portion, and a solvent deasphalting separation step of separating the first heavy portion into a second light portion and a second heavy portion whose pitch softening point is higher than 140° C., and wherein the gasification step disperses the second heavy portion into water uniformly to produce water slurry fuel, and then gasifies the water slurry fuel through the partial oxidation. 19. The oil fuel burning integrated combined cycle power generation method according to claim 12, wherein the gas turbine power generation step carries out mixed combustion for simultaneously burning the light portion in a liquid phase and the syngas in a gaseous phase. 20. The oil fuel burning integrated combined cycle power generation method according to claim 12, wherein the gas turbine power generation step separately carries out the power generation using the syngas and the power generation using the light portion, and wherein the power generation using the syngas is carried out as basic power generation, while the power generation using the light portion is carried out as auxiliary power generation for supplementing the basic power generation.