Modified fuel burning gas turbine

• US 7,594,387 B2
• Filed: 07/12/2005
• Issued: 09/29/2009
• Est. Priority Date: 07/15/2004
• Status: Active Grant

• Current Assignee: Mitsubishi Power Limited (Mitsubishi Heavy Industries, Ltd.), Petroleum Energy Center
• Original Assignee: Hitachi, Ltd., Petroleum Energy Center
• Inventors: Hokari, Nobuyuki, Takahashi, Hirokazu, Yamagishi, Masahiko, Yokota, Osami, Inage, Shinichi
• Primary Examiner(s): Casaregola; Louis J
• Application Number:
  US11/178,489
• Publication Number:
  US 20060288705A1
• Time in Patent Office: 1,540 Days
• Field of Search: 60/394.61, 60/394.65, 60/395.3, 60/395.9, 60/394.64, 443/01
• US Class Current: 60/39.464
• CPC Class Codes: C10G 31/06 by heating, cooling, or pressure treatment
• CPC Class Codes: C10G 31/08 by treating with water
• CPC Class Codes: C10G 9/00 Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
• CPC Class Codes: F01K 23/10 with exhaust fluid of one cycle heating the fluid in another cycle F01K17/025 takes precedence
• CPC Class Codes: F02C 3/24 the fuel or oxidant being liquid at standard temperature and pressure
• CPC Class Codes: F02C 7/224 Heating fuel before feeding to the burner

Abstract

A gas turbine which can be easily employed in an area where it is hard to obtain a sufficient amount of water, such as an isolated island. Heated and pressurized heavy oil and water in a supercritical state are mixed with each other in a modifying unit to produce fuel-purpose modified oil. The fuel-purpose modified oil is depressurized by a depressurizing valve. Due to a temperature fall caused by adiabatic expansion with the depressurization, the fuel-purpose modified oil is brought into a two-phase state where moisture is in a gas phase (steam) and modified oil is in a liquid phase. The fuel-purpose modified oil is separated into the steam and the modified oil by a gas-liquid separator. The separated steam is condensed to water in a condenser and returned to a water supply line. The modified oil in the liquid phase is supplied to a combustor, thereby driving a gas turbine.

Claims

1. A modified fuel burning gas turbine comprising:

a system for pressurizing heavy oil by a pressurizing pump and heating the pressurized heavy oil in an exhaust heat recovering boiler, thereby obtaining high-temperature, high-pressure heavy oil;

a system for pressurizing water by a pressurizing pump and heating the pressurized water in said exhaust heat recovering boiler, thereby obtaining high-temperature, high-pressure water;

a modifying unit for mixing the high-temperature, high-pressure heavy oil with the high-temperature, high-pressure water to produce fuel-purpose modified oil modified in property and lightened;

a depressurizing device disposed between said modifying unit and a combustor;

a separator for separation of depressurized the fuel-purpose modified oil into liquid-phase modified oil and steam;

a gas turbine operated with the liquid-phase modified oil supplied to said combustor and discharging exhaust gases into said exhaust heat recovering boiler;

a condenser for condensing the steam separated by said separator to water; and

a resupplier for resupplying the condensed water to said modifying unit.

2. The modified fuel burning gas turbine according to claim 1, wherein a water treatment unit for removing impurities from the condensed water is disposed between said condenser for condensing the steam separated by said separator to water and said resupplier for resupplying the condensed water to said modifying unit.

3. The modified fuel burning gas turbine according to claim 1, wherein the steam generated with depressurization of the fuel-purpose modified oil is divided into two lines, the steam in one line being condensed to water in said condenser and resupplied to said modifying unit through said resupplier, the steam in the other line being directly supplied to said combustor.

4. The modified fuel burning gas turbine according to claim 1, wherein a water treatment unit for removing impurities from the condensed water is disposed between said condenser for condensing the steam to water and said resupplier for resupplying the condensed water to said modifying unit, and the steam generated with depressurization of the fuel-purpose modified oil is divided into two lines, the steam in one line being condensed to water in said condenser and resupplied to said modifying unit through said resupplier, the steam in the other line being directly supplied to said combustor.