JPH0116328B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas turbine power plant, more particularly a gas turbine air compressor secondary system, for driving gas turbine means of a gas turbine power plant, and more particularly a gas turbine air compressor secondary system. The present invention relates to a gas turbine power plant of the type having a pressurized fluidized bed combustor and a cleaning secondary system for removing contaminated solids.

Currently known gas turbine power plants of the type mentioned above are disclosed in U.S. Pat. Nos. 3,791,137 and 3,924,402
The latter, although not shown in the said patent, in effect requires a secondary cleaning system to remove entrapped solids from the combustion gases before passing to the gas turbine, and has at least two drawbacks. . One of the drawbacks is that when inspection, maintenance, or repair work is performed on the fluidized bed combustor and the secondary cleaning system, the insides of both devices are under high temperature and pressure, so this pressure must be released and the It is dangerous to work on the inside of the device unless it is brought under pressure, so in this case the operation of both devices is stopped and the power production of the turbine power plant is interrupted in the meantime.
Another drawback is that, as mentioned above, it takes a long time to shift both devices from the operating state to the normal temperature and pressure state, so the interruption of the power generation of the turbine power plant takes a long time.

In view of the foregoing, one object of the present invention is to provide a gas turbine power plant of the type having a pressurized fluidized bed combustor, a cleaning secondary system, and a gas turbine air compressor secondary system, the power station being a fluidized bed. It is an object of the present invention to provide a system capable of generating power during downtime for inspection, maintenance and/or repair of a combustor and a secondary cleaning system. Another object of the invention is to be able to generate power more quickly after start-up than hitherto known power plants of the type described above and to reduce the amount of combustion gas generated in a pressurized fluidized bed in order to meet emergency load demands. The provision of a gas turbine power plant capable of providing combustion gas for replenishment.

Therefore, this invention basically consists of a pressurized fluidized bed combustor,
A novel gas turbine power plant is contemplated that consists of a cleaning secondary system and a gas turbine air compressor system that are interconnected to generate power.

The pressurized fluidized bed combustor is connected to receive a particulate fuel, such as high sulfur coal and a sulfur absorbent material such as dolomite, and burns said fuel in the fluidized bed combustor from its source to a temperature between 507°C and 954°C. Generates combustion gas at a temperature.

A secondary cleaning system comprising separation means, such as a cyclone separator, is connected to the fluidized bed combustor and receives the combustion gas from the fluidized bed combustor to remove entrained solids therein.

A gas turbine and air compressor secondary system has a gas turbine means, an air compressor means and a load, such as a generator means, which are interconnected so that the gas turbine means is connected to the air compressor means and the load. Drive both.

The fluidized bed combustor, cleaning secondary system and gas turbine and air compressor secondary system are the first and second
interconnected by conduit means. The first conduit means is for communicating the gas turbine means with the cleaning secondary system so that clean combustion gases are supplied to the gas turbine means for driving the gas turbine. A second conduit means is connected to the means for air compression and to the fluidized bed combustor for passing compressed air from the air compression means to the fluidized bed combustor to suspend the fuel and support combustion of the fuel. Valve means are provided within the first and second conduit means, operable to stop flow through the first and second conduit means;
This isolates the fluidized bed combustor and cleaning secondary system from the gas turbine and air compressor secondary system.

The gas turbine and air compressor secondary system also has an auxiliary combustor which is connected via a valve-controlled bypass conduit to the second conduit means for receiving compressed air from the means for compressing the air and the combustion occurring within the auxiliary combustor. and connecting the gas to the first conduit means for discharging the gas to the gas turbine for driving the gas turbine when the fluidized bed combustor and cleaning secondary system are isolated from the gas turbine air compressor secondary system. be done. This allows for continuous operation of loads such as electrical power generation while the fluidized bed combustor and cleaning secondary system are shut down, cooled and depressurized prior to inspection, maintenance and/or repair. .

In order that the invention may be more fully understood, the invention will now be described with reference to the accompanying drawings, which illustrate a gas turbine installation according to the invention.

In the figure, numeral 10 generally indicates a gas turbine power plant according to the invention, which power plant generally includes a fluidized bed combustor 12, a cleaning secondary system 1
4 and a gas turbine and air compressor secondary system 16, the secondary systems 14 and 16 being surrounded by a dashed line in the figure.

The fluidized bed combustor 12 has three laterally extending partitions 1
8, 20 and 22, they divide the interior of the fluidized bed combustor into one working zone or combustion zone 24, 2.
two inlet high pressure spaces 26 and 28 and an outlet high pressure space 3
Divide into 0. The fluidized bed combustor 12 is connected via a conduit 32 to a fuel supply means 34 for receiving suitably sized pulverized solid fuel, such as high sulfur coal, into the combustion zone 24. Fluidized bed combustor 1
2 is also connected via conduit 38 to supply means 36 for receiving a sulfur dioxide absorbent, such as pulverized dolomite, into the combustion zone. The partition 8 may be perforated or provided with tuyeres to distribute compressed air from the high pressure space 26 into the combustion zone 24 . In order to control the reaction temperature within the combustion zone 24 within a range of about 507°C and 954°C,
A heat exchanger 40 is disposed within combustion zone 24 and is connected to receive compressed air from inlet high pressure space 28 and discharge heated air into outlet high pressure space 30 . The ash generated within the combustion zone 24 is removed therefrom through a discharge conduit 42, an ash cooler 44 and an ash hopper 45.

Gas turbine and air compressor secondary system 1
6 includes an air compressor 46 coupled to and driven by a gas turbine 48. Gas turbine 48 is connected to discharge combustion gases to free power turbine 50 via conduits 52 and 54. A shutoff valve 56 within conduit 54 to control the flow of exhaust gas from turbine 48 into power turbine 50
is located. Also, the valve control bypass conduit 58
is provided to pass exhaust gas from turbine 48 to exhaust conduit 60 of power turbine 50 . A conduit 62 is provided from the exhaust conduit 60 of the free turbine 50 to
Alternatively, exhaust gas is directed from the exhaust conduit 52 of the gas turbine 48 to a kerosene boiler (not shown). When valve 64 is provided in conduit 62 and is open, and when valve 57 in bypass conduit 58 is closed, exhaust gas from gas turbine 48 bypasses free power turbine 50 and direct combustion boiler. Allow yourself to be guided. Free power turbine 50 is connected to drive a load such as a synchronous machine 66. Gas turbine and air compressor 2
The secondary system 16 also includes a first secondary combustor 68, which will be described in more detail below.

A secondary cleaning system 14 is provided within the facility 10 and includes a plurality of separators 70, 72, 7.
4 and 76, which include conduits 78, 80 and 82.
fluidized bed combustors 12 connected together in series by
The combustion gases exiting through the outlet conduit 84 are received in turn. The separator 70 is connected to the fluidized bed combustor 12 through a conduit 86 so that unburned particles of fuel are entrained in the combustion gases and from there are separated in the separator 70 and transferred to the combustion zone 1 for combustion.
Returned to 8. Sufficiently clean combustion gases exit separator 76 via outlet conduit 88 . Outlet conduit 88 is also connected to venting means including a tube 90 having a valve 92 and to a pressurized scraper 94 which is vented through tube 96 through which fluid flow is controlled by valve 98. The valve 92 is closed except when the power plant 10 is started or stopped. Separator 76 was operated by Aerodyne Development Corporation, 29085 Solon Road, Cleveland, Ohio, USA.
It is a type that requires air, such as the Series SV Dust Collector manufactured by. To supply air to the separator 76, the separator 76
00 to the fluidized bed combustor 12, the tubes communicating with the outlet high pressure space 30 of the fluidized bed combustor 12 at one end and with the separator 76 at the other end. Some of the compressed air can be discharged directly to the separator 76 through a bypass line 102 connected to the main compressed air supply line 104 by which the compressed air is transferred from the compressor 46 to the fluidized bed combustor 12. and a portion of the second conduit means leading thereto. A valve 106 is disposed within tube 102 to control flow therethrough. Compressed air passes through a bypass pipe 1 with a valve 112
10 to bypass the separator 76 and enter the clean combustion gas line 108. The clean combustion gas pipe 108 constitutes a first conduit means by which the clean secondary system 14 is interconnected with the gas turbine and air compressor secondary system 16 to transfer clean, high temperature, high pressure combustion gases to the gas turbine. Discharge to 48.

In addition to the main compressed air supply pipe 104, the second conduit means includes branch pipes 114 and 116. The branch pipe 114 is connected at one end to the main supply pipe 104 and at the other end to the high pressure space 26 for conducting compressed air to the high pressure space 26.
It is connected to the. Branch pipe 116 is connected to main supply pipe 104 at one end and to high pressure space 28 at the other end. The flow of compressed air through branch pipes 114 and 116 is regulated by valves 118 and 120 within the respective pipes. Valves 118 and 120 provide approximately one third of the high pressure space 2 for suspension of fuel particles and support of combustion of the fuel.
6, while about two-thirds of the air is directed to heat exchanger 4.
a main feed pipe 104 for flowing through the combustion zone 24 and for discharging into the high pressure space 28 for cooling the combustion zone 24;
It is normally adjusted to provide a distribution of compressed air discharged by compressor 46 into the air.

Bypass pipe 122 connects at one end to main supply pipe 104;
It is then connected to receive compressed air and pass compressed air to the second auxiliary combustor 124 . Fuel, such as oil or gas, is selectively injected into the combustor 124 to heat the compressed air to the tubes 114 and then to the fluidized bed combustor 12 as it is in the start-up mode of operation. Provide when needed. A valve 126 is provided within bypass pipe 122 to control the flow of compressed air to second auxiliary combustor 124 .

According to the present invention, complete shutdown of the power plant 10 is achieved by providing valve means for erecting the fluidized bed combustor 12 and the cleaning secondary system 14 from the gas turbine and air compressor secondary system 16. Inspection, maintenance, and repair of gas turbine power plants can be accomplished without the need for a gas turbine power plant. This valve means includes valves 106 and 11.
8, 120 and 126, including valve 130;
is within the clean combustion gas pipe 108 and the first auxiliary combustor 6
Discharge pipe 1 extending from 8 and connecting to gas pipe 108
Bypass pipe 11 between connection point 32 and gas pipe 108
0 and the connection point. Valve 1
06, 118, 120, 126 and valve 130, the gas turbine and air compressor 2
The system is then removed from communication with fluidized bed combustor 12 and cleaning system 14. Using a first auxiliary combustor 68 operable by oil or gas fuel injection and passage of compressed air therein via a tube 132 and an open valve 134 in the tube, combustion gases are transferred to the gas turbine 48 and the power turbine. 50 through tubes 132 and 108. In this way, some power generation is achieved during periods of rest of the power station 10. Additionally, to facilitate internal inspection and repair, the high temperature, high pressure gases within fluidized bed combustor 12 and cleaning secondary system 14 pass through these components through line 90, scraper 94 and line 96 to open valves 92 and 98. It is released by ventilation.

To prevent surging of the compressor 46, anti-surge means in the form of a check valve 136, a bypass pipe 138 and a valve 140 are provided.

This invention provides a fluidized bed combustor, a combustion gas purification secondary system, a gas turbine, and an air compressor 2.
A fluidized bed combustor and a combustion gas cleaning secondary system having the following systems can be separated from the gas turbine and compressor secondary system for their inspection, maintenance and repair, and an auxiliary combustor. It is believed that it has become readily apparent to provide a gas turbine power plant capable of doing useful work, such as generating some power. This power station allows relatively rapid release of high temperature and pressure gases from the fluidized bed combustor and cleaning secondary system, thereby providing access to the interior of those components for inspection and/or repair. can be achieved relatively quickly.

Although one embodiment of the invention has been illustrated and described in detail, it is to be understood that the invention is not so limited. It will now be appreciated by those skilled in the art that various changes can be made in the arrangement of components without departing from the spirit and scope of the invention.

[Brief explanation of drawings]

The drawing shows one of the gas turbine power stations according to the present invention.
1 is a schematic diagram showing an example. 10... Gas turbine power plant, 12... Fluidized bed combustor, 14... Secondary cleaning system, 16...
Gas turbine and air compressor secondary system, 3
4, 36... Fuel supply means, 46... Air compressor, 48... Gas turbine, 50... Power turbine (free turbine), 66... Synchronous generator, 68
...First auxiliary combustor, 94... Scrapper, 10
8...first conduit means, 104...second conduit means,
118, 120... Valve, 124... Second auxiliary combustor, 130... Valve, 132... Bypass conduit, 1
34... Valve.

Claims (1)

Claims: 1 a. A pressurized fluidized bed combustor connected to receive pulverized fuel and a sulfur absorber from a source thereof for burning fuel therein to produce combustion gases; b. said combustion gases. a cleaning secondary system connected to said fluidized bed combustor for receiving and removing entrapped solid particles in the combustion gases; c gas turbine means driving both the means for air compression and the load means; A gas turbine and an air compressor 2 having a gas turbine means, an air compressor means and a load means interconnected to
system; d cleaning 2 so that the combustion gases are discharged to the gas turbine for driving the gas turbine means;
a first conduit means for communicating said gas turbine means with a second system; means for compressing air and second conduit means connected to said fluidized bed combustor; valve means in said first and second conduit means operable to extend from said compressor secondary system; and g. a second conduit means for receiving from the compression means and for driving the gas turbine when the fluidized bed combustor and cleaning secondary system is erected from the gas turbine and air compressor secondary system; A gas turbine power station connected through a valved bypass conduit to the first conduit means for discharging combustion gases to the means. 2 Patent in which venting means are provided for passage of combustion gases from the fluidized bed combustor and cleaning secondary system upon isolation of the fluidized bed combustor and cleaning system from the gas turbine and air compressor secondary system. A gas turbine power plant according to claim 1. 3. Claim 1, wherein the ventilation means includes a scraper for cooling the gas before it is discharged into the atmosphere.
The gas turbine power plant described in Section 1. 4 a first turbine to which gas turbine means of said gas turbine and air compressor secondary system is connected to drive means for compression; and a second turbine receiving exhaust gas from said first turbine for being driven thereby. 2. A gas turbine power plant as claimed in claim 1, including: said second turbine being connected thereto for driving power generation means.