JPH05332167A - Fuel reforming type gas turbine power generator - Google Patents

Abstract

PURPOSE:To carry out reformation reaction of prime combustion sufficiently as so to improve efficiency of a system by providing a high temperature reformer on a reformation fuel line, and also returning back a high temperature gas which is extracted from the intermediate step of the gas turbine into the intermediate step of the gas turbine through the high temperature reformer again. CONSTITUTION:In a reformer 2, steam is led into a prime fuel line 1 to reform prime fuel. Reformed fuel is supplied into a combustor 8 passing a reformation fuel line 7. A gas turbine 12, a power generator 15 is rotatably driven by using a means of combustion gas generated in the combustor 8. The reformer 2 is constituted as a low temperature reformer. In this case, a high temperature reformer 18 is provided on the way of the reformation fuel line 7. On the other hand, by a gas extracting line 19, high temperature gas is extracted from the intermediate step 21 of the gas turbine 12 to supply into the high temperature reformer 18. And by a gas returning-back line 20, gas passing the high temperature reformer 18 from the gas extracting line 19 is returned back to the intermediate step 22 of the gas turbine 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel reforming type gas turbine power generator.

[0002]

2. Description of the Related Art A conventional power generator of this type is, for example,
The structure is as shown in FIG. In FIG.
1 is a raw fuel (NG, LPG, naphtha) line, 2 is a low temperature reformer, 3 is an exhaust heat recovery boiler, 4 is a water supply line, 5 is a pump, 6 is a steam line, 7 is a reformed fuel line, 8 is a Combustor, 9 air compressor, 10 air supply line, 11 compressed air line, 12 gas turbine, 13 turbine inlet line, 14 turbine exhaust line, 15 generator, 16
Is an exhaust gas line, and 17 is a stack.

That is, a low temperature reformer ₂ for reforming the fuel (converting it into a fuel having H ₂ and CO) by introducing steam into the raw fuel, an exhaust heat recovery boiler 3 for generating the steam, A steam line 6 for supplying steam from the boiler 3 to the low temperature reformer 2, a reformed fuel line 7 for supplying the fuel reformed by the low temperature reformer 2 to the combustor 8, and combustion generated in the combustor 8. It has a gas turbine 12 and the like that introduces gas as a drive source to drive the generator 15 to rotate.

[0004]

However, in the conventional power generator shown in FIG. 2, since only the low temperature reformer 2 is used as the reformer, that is, the reformer is discharged from the gas turbine 12 and the exhaust line 14. The temperature of the turbine exhaust gas supplied to the low temperature reformer 2 is as low as about 600 ° C,
Since the raw fuel is burned in the combustor 8 without being sufficiently reformed, there is a problem in that the efficiency of the system utilizing the reforming reaction is not improved much.

The present invention is intended to solve the above problems. That is, it is an object of the present invention to provide a fuel reforming type gas turbine power generator in which the reforming reaction of the raw fuel in the reformer is sufficiently performed and the efficiency of the system can be improved. Is.

[0006]

To achieve the above object, the present invention provides a reformer for introducing steam into a raw fuel to reform the fuel, and a fuel reformed by the reformer. And a gas turbine for introducing a combustion gas generated in the combustor as a drive source to drive the generator to rotate, and the reformer has a low-temperature reformer. In a power generator that is a gas turbine, the gas turbine is provided with a high temperature reformer installed in the middle of the reforming fuel line, and the intermediate stage of the gas turbine is connected to one side of the high temperature reformer. Of the high temperature reformer and the other side of the high temperature reformer and the intermediate stage of the gas turbine by connecting the gas extraction line for extracting high temperature gas from the intermediate stage of Gas return line for returning the gas passing through the reformer to the intermediate stage of the gas turbine It was assumed to have a.

[0007]

According to the present invention, in a fuel reforming type gas turbine power generator in which the reformer is a low temperature reformer, a reformed fuel line for supplying the fuel reformed by the low temperature reformer to a combustor. A high-temperature reformer installed in the middle of the gas turbine, and further, by connecting the intermediate stage of the gas turbine and one side of the high-temperature reformer to extract the high-temperature gas from the intermediate stage of the gas turbine, The gas extraction line supplied to the reformer, the other side of the high temperature reformer and the intermediate stage of the gas turbine are connected to each other, and the gas passing through the high temperature reformer from the gas extraction line is connected to the gas turbine of the gas turbine. Since it has a gas return line that returns to the intermediate stage,
The reformed fuel that has not been sufficiently reformed in the low-temperature reformer is sufficiently reformed in the high-temperature reformer, so that the efficiency can be improved by the reforming effect.

[0008]

FIG. 1 shows an embodiment of the present invention. Figure 1
2, the reference numerals 1 to 17 are the same as those in FIG.
Further, 18 is a high temperature reformer described later, 19 is a turbine intermediate stage extraction line, and 20 is a turbine intermediate stage gas return line.

That is, the high temperature reformer 18 is installed in the middle of the reforming fuel line 7 connecting the low temperature reformer 2 and the combustor 8. The turbine intermediate stage extraction line 1
9 is connected to a part 21 of the intermediate stage of the gas turbine 12 and one side of the high temperature reformer 18, and the gas turbine 1
A high temperature gas is supplied to the high temperature reformer 18 from an intermediate stage of No. 2.

The turbine intermediate stage gas return line 20
Is connected to the other side of the high temperature reformer 18 and to the immediate downstream portion 22 of the part 21 of the intermediate stage of the gas turbine 12, and the gas passing through the high temperature reformer 18 from the extraction line 19 Are returned to the intermediate stage of the turbine 12.

In the fuel reforming type gas turbine power generator constructed as shown in FIG. 1, the raw fuel from the raw fuel line 1 is turbined in the low temperature reformer 2 by the steam from the steam line 6. About 600 ° from the exhaust line 14
The turbine exhaust gas of C is heated as a heat source to be reformed to some extent, and further, in the high temperature reformer 18, the extracted gas at about 900 ° C. from the turbine intermediate stage extraction line 19 is heated as a heat source, Since it is sufficiently reformed, the efficiency of the system can be improved by the reforming effect.

The temperature of the combustion gas in the turbine inlet line 13 is preferably about 1600 ° C, and at least 900 ° C is desirable.

[0013]

As described above, according to the present invention,
In a fuel reforming gas turbine power generator in which the reformer is a low temperature reformer, a high temperature reformer installed in the middle of a reforming fuel line for supplying the fuel reformed by the low temperature reformer to a combustor. And a gas extraction line that connects the intermediate stage of the gas turbine and one side of the high temperature reformer and extracts high temperature gas from the intermediate stage of the gas turbine and supplies the extracted high temperature reformer to the high temperature reformer. And a gas return line that connects the other side of the high-temperature reformer and the intermediate stage of the gas turbine and returns the gas that has passed through the high-temperature reformer from the gas extraction line to the intermediate stage of the gas turbine. Since it is provided, the reformed fuel that has not been sufficiently reformed in the low temperature reformer is sufficiently reformed in the high temperature reformer, and therefore the efficiency can be improved by the reforming effect.

Further, as the heating source of the high temperature reformer, the gas extracted from the intermediate stage of the gas turbine is used and then returned to the intermediate stage, so that the extracted place is the optimum place in the design stage. Therefore, the reforming temperature can be set in the optimum temperature range, and the efficiency improving effect due to the reforming can be sufficiently obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a conventional technique.

[Explanation of symbols]

 1 Raw Fuel Line 2 Low Temperature Reformer 6 Steam Line 7 Reformed Fuel Line 8 Combustor 12 Gas Turbine 13 Turbine Inlet Line 14 Turbine Exhaust Line 15 Generator 18 High Temperature Reformer 19 Turbine Intermediate Stage Extraction Line 20 Turbine Intermediate Stage Gas Return line 21 Part of intermediate turbine stage 22 Directly downstream part of intermediate turbine stage

Claims (3)

[Claims] 1. A reformer for introducing steam into a raw fuel to reform the fuel, a reforming fuel line for supplying the fuel reformed by the reformer to a combustor, and the combustor. A power generator having a gas turbine that introduces the generated combustion gas as a drive source to drive a generator to rotate, and the reformer is a low-temperature reformer, and is installed in the middle of the reforming fuel line. And a high temperature reformer which is connected to an intermediate stage of the gas turbine and one side of the high temperature reformer to extract high temperature gas from the intermediate stage of the gas turbine to the high temperature reformer. The gas extraction line to be supplied is connected to the other side of the high temperature reformer and the intermediate stage of the gas turbine, and the gas passing through the high temperature reformer from the gas extraction line is returned to the intermediate stage of the gas turbine. A fuel reforming type gas turbine, which is equipped with a gas return line. Power generator. 2. The gas extraction line is connected to a part of an intermediate stage of the gas turbine, and the gas return line is connected to a part of the intermediate stage of the gas turbine, just downstream of the part.
The fuel reforming type gas turbine power generator described. 3. The temperature of the combustion gas supplied to the gas turbine is 900 to 1600 ° C., and the temperature of the turbine exhaust gas supplied to the low temperature reformer is about 600 ° C. 1. The fuel reforming type gas turbine power generator according to 1 or 2.