JPH07109904A - Crude oil fractional distillation type combined cycle power generation system - Google Patents

Abstract

PURPOSE:To incorporate a crude oil fractional distillator 1 directly into the existing crude oil fuel supply system in a heat power plant using crude oil for fuel to remodel the system into a new main pipe system combined with a gas turbine so that the system can be converted to a high efficiency combined cycle power generation system. CONSTITUTION:A crude oil fractional distillator 1 is incorporated into an existing crude oil fuel supply system 10 in a heat power plant using crude oil for fuel and the fuel supply system 10 is branched through the crude oil fractional distillator 1 into two systems, i.e., a gas fuel system and liquid fuel system 12. The fuel is cooled and liquefied through a gas cooler 2 in the gas fuel system 11 and supplied to a gas turbine 4 by a booster pump. On the other hand, in the liquid fuel system 12, remaining oil as fuel is supplied to a boiler 5 body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined cycle power generation system, and more specifically, in a thermal power generation facility that uses crude oil as a fuel, a crude oil fractionation type combined turbine in which a steam turbine and a gas turbine are connected as a drive source of a generator. Cycle power generation system.

[0002]

2. Description of the Related Art Currently, most of highly efficient combined cycle power generation systems using gas turbines adopted by electric power companies use LNG (liquefied natural gas) as fuel.
It is in the power generation equipment using.

[0003]

However, the above-mentioned power generation equipment has a drawback in that the cost of constructing LNG transportation, receiving, storage, and safety and disaster prevention facilities is very high. Furthermore, when converting the existing crude oil-fired thermal power generation system to a combined type that uses LNG as fuel, the cost equivalent to rebuilding, including changing the main pipe system to LNG specifications, will be imposed. It wasn't.

The present invention has been made in view of the above circumstances, and solves the above problems and directly incorporates a crude oil fractionator into an existing crude oil fuel supply system in a thermal power generation facility using crude oil as a fuel, It is an object of the present invention to provide a crude oil fractionation combined cycle power generation system that can be converted into a highly efficient power generation facility by modifying it into a new main pipe system that combines turbines.

[0005]

In order to achieve the above object, the present invention provides a thermal power generation facility using crude oil as a fuel,
A combined cycle power generation system in which a steam turbine and a gas turbine are combined as a drive source of a generator, and a crude oil fractionator is incorporated in a crude oil fuel supply system, and the fuel supply system is divided into a gas fuel system and a liquid fuel system. Branch off,
It is characterized by constructing a cyclic main pipe system that supplies fuel to the gas turbine and the boiler, respectively, and recovers and circulates the residual thermal energy after consumption in the steam turbine.

Here, the main pipe system introduces the gas separated in the crude oil fractionator into the gas cooler to liquefy the cooling, and then supplies the fuel to the gas turbine through the booster pump and the residual oil to the boiler. A liquid fuel system that supplies as main fuel, an exhaust gas system that supplies the exhaust gas of the gas turbine as combustion air to a boiler, a steam system that introduces the steam generated by the boiler into a steam turbine, and energy at the high pressure side of the steam turbine. A heat recovery line that partially extracts the remaining heated steam after consumption and introduces it to the crude oil fractionator, a hot water circulation line that circulates the hot water after heat recovery to the water supply system, and condensate of the steam turbine of the water supply system. It may be configured to include a heat exchange line that is circulated from the middle through the gas cooler of the gas fuel system.

[0007]

[Operation] A crude oil fractionator is incorporated in a crude oil fuel supply system, and the fuel supply system is branched into two systems, a gas fuel system and a liquid fuel system, which are supplied to a gas turbine and a boiler, and a steam turbine is used as a drive source for a generator. It is possible to configure a main pipe system having a cyclic heat utilization mode including output increase per shaft and heat recovery by connecting the gas turbine with the gas turbine and operating them cooperatively.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a flow sheet of a crude oil fractionation type combined cycle power generation system in which a thermal power generation facility using crude oil as a fuel is system-converted. However, this diagram is a flow sheet showing the outline of the main pipe system, and the details and control system configuration diagram are omitted. In addition, when the system is converted, most of the existing system will be preserved and reused as it is by diversion or partial modification.

Here, 1 is a crude oil fractionator, 2 is a gas cooler, 3 is a booster pump (P), and 4 is a gas turbine (G).
T) 5, boiler, 6 steam turbine (ST), 7 generator (G), 8 condenser, 9 crude oil storage tank, 10 crude oil fuel supply system, 11 gas fuel system, 12 Liquid fuel system, 13 exhaust gas system, 14 steam system, 15 water supply system, 24
Is a heat recovery line (steam), 25 is a hot water circulation line (drain), and 35 is a heat exchange line (water supply). It should be noted that the system and the line have almost the same meaning, but here, the case where a partial section in the system is referred to along with its role is defined as the line.

As shown in the figure, this system incorporates a crude oil fractionator (1) into an existing crude oil fuel supply system (10) in a thermal power generation facility that uses crude oil as a fuel, and installs the crude oil fractionator (1). Through the fuel supply system (10) to the gas fuel system (1
1) and liquid fuel system (12). Here, fuel crude oil is supplied to the crude oil fractionator (1),
Separates into gas (volatile matter) and liquid (residual oil) at 200 ℃ to 300 ℃. In the gas fuel system (11), the gas cooler (2)
It is liquefied as a cooling fluid via the and is supplied to the gas turbine (4) by the booster pump (3). Meanwhile, liquid fuel system (12)
Then, the residual oil is supplied as fuel to the main body of the boiler (5).

The exhaust gas of the gas turbine (4) is supplied to the boiler as combustion air via the exhaust gas system (13), and the steam generated by the boiler (5) is supplied to the steam turbine (14) via the steam system (14). 6) Introduce to (high pressure turbine and low pressure turbine). In addition, a part of the heated steam whose energy has been consumed on the high pressure side of the steam turbine (6) is extracted and introduced into the crude oil fractionator (1) via the heat recovery line (24) for heat recovery.

The hot water after heat recovery is circulated to the water supply system (15) via the hot water circulation line (25), and the condensate of the steam turbine (6) is fed from the condenser (8) to the boiler (5). )
Gas cooler (2) in the gas fuel system (11) via the heat exchange line (35) from the middle of the water supply system (15) to the
It is introduced and circulated into the main pipe system that has a cyclic form of heat utilization.

In this way, the output per shaft can be increased by connecting the steam turbine (6) and the gas turbine (4) as driving sources of the generator (7) and operating them cooperatively.

[0014]

Industrial Applicability According to the present invention, a crude oil fractionator is introduced into a crude oil fuel supply system of a thermal power generation facility that uses crude oil as a fuel so that the fuel supply system has two systems. Since it is branched and converted into a highly efficient combined cycle power generation system that combines a gas turbine as a drive source of the generator, a series of fuel management in power generation equipment,
In other words, materials needed for transportation, reception, storage, disaster prevention facilities,
Labor force, work period, etc. can be significantly reduced compared to LNG equipment.

Moreover, the existing system (mainly the fuel supply system)
The system is converted by remodeling the existing equipment, and the existing equipment is reused in the reconstructed system or reused by partly remodeling, so construction costs can be significantly reduced and the installation space of equipment can be reduced in volume and area. Can be achieved.

[Brief description of drawings]

FIG. 1 is a flow sheet showing an embodiment of a crude oil fractionation type combined cycle power generation system of the present invention.

[Explanation of symbols]

 1 crude oil fractionator 2 gas cooler 3 booster pump (P) 4 gas turbine (GT) 5 boiler 6 steam turbine (ST) 7 generator (G) 8 condenser 9 crude oil storage tank 10 crude oil fuel supply system 11 gas fuel System 12 Liquid fuel system 13 Exhaust gas system 14 Steam system 15 Water supply system 24 Heat recovery line (steam) 25 Hot water circulation line (drain) 35 Heat exchange line (water supply)

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Claims (2)

[Claims] 1. A thermal power generation facility using crude oil as a fuel, which is a combined cycle power generation system in which a steam turbine and a gas turbine are connected as a drive source of a generator, and a crude oil fractionator is incorporated in a crude oil fuel supply system, The fuel supply system is branched into two systems, a gas fuel system and a liquid fuel system, to supply fuel to the gas turbine and boiler respectively, and to recover and circulate the residual thermal energy after consumption in the gas turbine, boiler and steam turbine. A crude oil fractionation combined cycle power generation system characterized by a cyclic main system. 2. The main pipe system introduces the gas separated in the crude oil fractionator into a gas cooler to liquefy and cool it, and then feeds the gas to a gas turbine through a booster pump and a residual oil boiler. Liquid fuel system for supplying as main fuel, exhaust gas system for supplying exhaust gas of the gas turbine as combustion air to the boiler, steam system for introducing steam generated by the boiler to the steam turbine, and energy consumption on the high pressure side of the steam turbine A heat recovery line that partially extracts the remaining heated steam afterwards and introduces it to the crude oil fractionator, a hot water circulation line that circulates the hot water after heat recovery to the water supply system, and condensate of the steam turbine in the middle of the water supply system. 2. A crude oil fractionation type combined cycle according to claim 1, further comprising a heat exchange line adapted to circulate through the gas cooler of the gas fuel system. Le power generation system.