JPS5832927A - Gas turbine device - Google Patents

Abstract

PURPOSE:To prevent the output fluctuation of a gas turbin caused by atmospheric temperature while keeping air to be supplied to a compressor in desired low temperature by cooling the combustion air of the gas turbin through liquid fuel and a heat pipe. CONSTITUTION:Branch lines 20 and 30 are provided on the seawater line 2A of an evaporator 2 to make it possible to supply pure water from a raw water tank 9, and a heat exchanger 8 for cooling air to be supplied to a compressor 5 is provided, allowing water after heat exchanging in the evaporator 2 to be circulated into said heat exchanger 8. The fuel of a gas turbin 4 is fed from a LNG tank 1, and is changed to normal temperature gas by an LNG evaporator 2 and sent to a combustor 3. On the other hand, combustion air required for the combustor 3 is sucked by an air compressor 5, and heat exchanged with water by the heat exchanger 8 provided at the inlet of the air compressor 5 to be adjusted to prescribed temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas turbine device, and more specifically, to a gas turbine device that is not affected by atmospheric temperature and can maintain a constant output of the gas turbine.

Gas turbine installation W! 1. The compressor compresses a large amount of air, performs concentric combustion with gas or liquid fuel, uses the expansion energy at this time to obtain energy for one revolution, and further converts the fins into electrical energy.

2. Description of the Related Art In recent years, so-called combined power generation plants have been known that use room-temperature gas discharged from a gas turbine device and have steam turbines installed in parallel that use steam as a driving source.

Figure 1 shows an equipment system diagram of a conventional combined cycle power plant, such as Ren. The equipment includes a liquid fuel tank 1, a vaporizer 2 for liquid fuel wrinkled by seawater snow A, a combustion l13 connected to the fuel tank, and a compressed air supply to the a'* device 5. A compressor 5 to be supplied, a gas turbine connected to the combustion 115, a power generation facility 6 directly connected to it to generate electricity, and a waste heat recovery system that generates steam using high-temperature gas discharged from the gas turbine. Heat exchanger (HR
so) xa, a steam turbine 16 whose driving source is steam generated by HR8G, and its power generation equipment for six people.

In the above configuration, when the atmospheric temperature changes, the compressor 3)
(As the specific volume of the supplied air 6A increases or decreases, the weight (flow rate) of the air taken into the first gas turbine will change, which has the drawback that the output of the gas turbine will change depending on the atmospheric temperature.) When the output changes, HR8G
The amount of heat generated changes, and the way the steam turbine comes out also changes.

In other words, changes in atmospheric temperature have a significant effect on the overall plant output. According to estimates, the atmospheric temperature is 20°.
When going up by 0, the plant output goes down by about 10-. In Japan, where electricity demand tends to be concentrated during the hottest period of the summer, and where it is difficult to locate power plants, it is an important issue that the overall output of plants is affected by atmospheric temperature. be. In order to obtain the rated output during the hot summer months, it would be economically disadvantageous to have equipment that is adjusted to the maximum output during the summer season, as this would result in excessive equipment throughout the year.

The object of the present invention is to overcome the drawbacks of the prior art described above, and to maintain the supply air to the compressor at a desired low temperature [K], depending on the ambient temperature. Our company provides gas turbine equipment that prevents fluctuations in gas turbine output.

The present invention conventionally uses liquid fuel (hereinafter referred to as L) based on the calorific value of seawater.
When LNG (represented by NG) is vaporized by the gas turbine intake air, the air temperature is lowered by heat exchange with the LNG, and the total output of the plant including the gas turbine and auxiliary equipment is reduced. This is intended to increase and stabilize the amount. That is, the present invention includes an air compressor, a combustor that mixes and burns compressed air obtained by the compressor and fuel, and a turbine that expands combustion gas in the combustor to rotate a turbine. Nine gas turbines 1ltKTh,
It is characterized by being provided with a cooling device for the air supplied to the air compressor.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 2 is an equipment system diagram of an opportunity power generation plant showing one embodiment of the present invention. The difference from the conventional device shown in FIG. 1 is that the seawater line 11AK branch lines 20 and 30 of the vaporizer 2
4 to enable fresh water to be supplied from the raw water tank 9.
．． A heat exchanger 8 is provided to cool the air supplied to the compressor 115, and the vaporizer 3 exchanges heat with the nuclear heat exchanger 8, and the Q medium is then circulated. The raw water supply line from the raw water tank 9 is provided with a fresh water intake valve 9A, and the water circulation line 20 is equipped with a circulation pump, a circulation pump stop valve 12, and a flow rate adjustment valve No. 1, and a seawater supply line 30FC. A seawater intake stop valve 10 is provided. A circulation pump outlet stop valve 13 and a seawater discharge stop valve 11 are installed in the circulation line between the vaporizer 2 and the heat exchanger 8.
A seawater discharge line with a

In the above configuration, the fuel of the gas turbine number is led from the LNO tank 1 and is converted into a gaseous body at room temperature by the LNG vaporizer 2 and sent to the combustor 3. For substituting the seawater taken by the pump, raw water, water with a low content of corrosive substances, is used in combination with water extraction.

On the other hand, combustor 3. The combustion air necessary for
1m1 section is performed. When the atmospheric temperature is low, the heat exchanger 8
In this case, moisture in the atmosphere may freeze or block the heat transfer surface, so in this case, the conventional seawater vaporization system can be used by switching the safety valves 10, 11, 12, and 13. .

According to the above embodiment, the LNG vaporization @sP and the rounding that performs heat exchange with the supply air of the compressor mainly through water;
There is less corrosion of equipment, and compared to the method of directly passing LNG through the heat exchanger 8 for heat exchange, it is possible to avoid the risk of LNG explosion due to tube leaks, etc., and construction is easy. Furthermore, even if a failure occurs in the heat exchanger 8.

Advantage 4: k does not reach the point where the plant is shut down.

- According to an example, the latent heat and sensible heat of LNG fuel are used to increase the gas turbine combustion air temperature from 35°C to approximately 115'O
By reducing the amount of heat and recovering heat, we were able to increase the plant efficiency by about 10% or more.

In the above embodiment, non-corrosive water was used in the raw water tank 9, but seawater, prine, or other medium may also be used.

Next, FIG. 943 is a similar equipment system diagram showing another embodiment of the present invention, but the difference from the embodiment in FIG.
An intermediate heat exchanger 17 is installed between the vaporizer 2 and the heat exchanger 8, and a pump 18 and a flow rate control valve 1 are installed in the pipe of the heat exchanger 1.
A heat medium such as a fluoride tube is circulated through the pipe, and seawater from the vaporizer 2 is circulated outside the pipe, thereby indirectly performing heat exchange between them. in this case,
Due to the atmospheric temperature of 1lrF, there is no need to switch the heat medium (water or seawater) as shown in Figure 2, and the amount of exchange heat that can be transferred to the pigeon house and heat exchanger 8, where the atmospheric temperature is low, is reduced. This will eliminate icing and other problems, making continuous operation easier.

Next, FIG. 4 is a system diagram of a gas turbine AT showing an embodiment of the present invention using a heat pipe as a heat exchange device. In the figure, LNGIA for gas turbine fuel exchanges heat with combustion air 8 through heat exchanger 22 and 2-inch heat pipe connected by heat pipe No. 2, and is heated to approximately atmospheric temperature. Furthermore, if necessary, heat is exchanged by a heat exchanger 25, 26 having another pipe 2"1, 11
It is reheated to 50-200'O or more and supplied to the combustor 3 of the gas turbine number. Heat pipe heat exchanger (22
The air 8 for air 8 cooled on the evaporation side 23 of 23) is supplied to the combustor S after being compressed by the compressor 5 which is driven coaxially with the gas turbine and generator 6. on the other hand,
The waste gas 31 that has exited the gas turbine passes through the boiler 28, is further heat-recovered in the condensation 1126 of the other heat-vib heat exchangers 1i (25 and 26), and is released into the atmosphere.

The heat pipe No. 2' is approximately -160"0f) LN
In order to carry out heat exchange between G and air at about 30° C., a suitable enclosing medium is a medium that does not generate high pressure and has a threshold value, such as propane. On the other hand, heat pipe 2
1 is heat exchange at room temperature, and water is used in an appropriate amount. Note that water can also be used as a medium for the heat pipe 24, but consideration must be given to the design, starting, and stopping of each heat exchanger 22, 23.

According to the above-mentioned embodiments, the combustion air of the gas turbine is cooled through the liquid fuel and the heat pipe.
Plant efficiency can be improved by eliminating output fluctuations due to changes in the atmospheric temperature of the gas turbine, increasing its cycle efficiency, and recovering heat from waste gas.

Furthermore, by using a heat pipe as a part of the heat exchanger, mixing of LNG and air due to breakage of the heat exchanger tube can be prevented, resulting in a highly safe system.

In addition, the heat pipe can be used to separate the heat exchanger and the heat exchanger, and for example, the LNG evaporation section can be installed at a distance from the gas turbine section to further improve safety.

In FIG. 4, a heat pipe heat exchanger is shown that is separated into evaporation sides 23' and 36 and condensation side 12.25, and the heat exchangers are heated by circulating PK medium in pipes 2 and 2', respectively. Although an example in which exchange is performed is shown, the present invention is not limited to this, and for example, a heat-vib heat exchanger in which an evaporating section and a condensing section are integrated can be used.

Further, as the liquid fuel used in the present invention, 1. In addition to NO, for example, LPG, coal liquefied gas, etc. can also be used.

As described above, according to the present invention, by providing a heat exchanger for cooling the gas turbine inlet air and combining this with a liquid fuel vaporization equipment, a high gas If the turbine output value is maintained, 4 ICs can be set at 1 m for safe and easy operation.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a conventional gas turbine device. 2, 3, and 4 are system diagrams of gas turbine apparatuses showing various embodiments of the present invention. , l... LNG tank, 2... LNG vaporizer, 3... combustor, number... gas turbine, 5...- air compressor, -6... Generator, 2...- Circulation pump, 8... Fuel exchanger, 9
・・・・・・Raw water tank, 10・・−・−・Seawater intake stop valve, 24.27 songs・・Heat pipe. Agent Patent Attorney Takeshi Kawakita Figure 11 Figure 2

Claims (1)

[Scope of Claims] (1) An air compressor, a combustor that combusts the compressed air obtained by the pressure aSS and fuel, and a gas that expands the combustion gas of the combustor and rotates a turbine. A gas turbine device 11 equipped with a turbine, characterized in that a cooling at for air supplied to an air compressor 111 is provided. (2. In claim 1, the cooling device is a gas turbine device characterized in that it is a heat exchange device between air and water or other O medium using liquid fuel as a cold heat source. ( 3) In claim fJ2, the gas turbine device is characterized in that the heat exchange device is liquid natural gas (LNG). (4) In claim 2, A gas turbine device characterized by being round and using a heat pipe filled with a heat medium.