JP2928678B2 - Pressurized fluidized bed plant and its operation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressurized fluidized-bed plant comprising a pressurized-fluidized-bed boiler, a gas turbine, a generator, and the like, and an operation method thereof. The present invention relates to a pressurized fluidized bed plant that can be designed and an operation method thereof.

[0002]

2. Description of the Related Art A combined plant usually includes a gas turbine, a steam turbine, and an exhaust heat recovery boiler, and uses the exhaust gas from the gas turbine as a heat source to drive the steam turbine with steam generated by the exhaust heat recovery boiler. In this combined plant, a plant using a pressurized fluidized bed boiler also serving as a combustor of a gas turbine is referred to as a pressurized fluidized bed plant.

[0003] This pressurized fluidized bed plant is specifically configured as follows. First, compressed air is obtained by an air compressor driven by a gas turbine and sent to a pressurized fluidized bed boiler. The pressurized fluidized-bed boiler is charged with coal as a fuel, and gasified fuel obtained by combustion in the boiler is sent to a gas turbine to be driven. Since the gas turbine exhaust gas has a sufficiently high temperature, the steam turbine is driven by the steam generated by the exhaust heat recovery boiler to recover heat as in a conventional combined plant. Further, the steam generated in the pressurized fluidized bed boiler is also guided to the steam turbine, and drives the steam turbine.

[0004] Such a pressurized fluidized bed plant is disclosed in
No. 63-230927 is known.

[0005]

The pressurized fluidized-bed boiler portion of a pressurized fluidized-bed plant has pressurized combustion performed therein, and has a pressure vessel for holding compressed air for combustion from an air compressor. I need. In addition, this pressure vessel must be of a large capacity in order to accommodate therein a boiler furnace, a dust removal device, a fluid material storage tank, and the like.

[0006] Like a recent thermal power plant operating at an intermediate load, a pressurized fluidized bed plant is also required to perform a positive load change operation. In this case, it is necessary to quickly follow the load request command, but providing a large-capacity pressure vessel may hinder rapid load following.

This example will be described. air compressor,
In an air and gas system composed of a pressurized fluidized bed boiler and a gas turbine, it is necessary to increase or decrease the flow rate of the air compressor when the load changes, but the furnace inlet air flow rate and gas turbine inlet gas flow rate are the air compressor outlet flow rate. Shows a transient change characteristic of being delayed with respect to time. on the other hand,
Since the pressure of the air and gas systems is determined by the gas turbine inlet, the furnace inlet pressure and the air compressor discharge pressure change in time with respect to the air compressor outlet flow in the same manner as the gas turbine inlet gas flow. Is shown.

[0008] These transient characteristics of flow rate and pressure become more remarkable as the rate of change of the capacity in the pressurized fluidized bed boiler pressure vessel which occupies most of the capacity of the air and gas system and the flow rate of the air compressor are larger. is there. Therefore, when the pressurized fluidized bed plant is operated at a high load change rate in the future, it is considered that the transient characteristics of the flow rate and the pressure of the air and the gas system become apparent.

[0009] From the above, in the present invention, the pressure
It can control the pressure in the fluidized bed boiler or the flow rate of combustion air,
Transient flow and pressure changes in the air and gas systems during load drop
Can quickly follow these changes
Not only does the compressed air
An object of the present invention is to provide a pressurized fluidized bed plant capable of effectively performing heat recovery by a steam generator and a method of operating the same.

[0010]

In order to achieve the above object, the present invention provides a pressurized fluidized bed plant as described below.
provide. That is, the pressurized fluidized bed plant of the present invention
Gas turbine and air pressure driven by the gas turbine
Compressed air from the compressor and coal and air compressor
A pressurized fluidized-bed boiler for producing a combustion gas;
Gas turbine exhaust gas passing through the gas turbine driven by the
A steam generator for performing heat exchange with the heat and generating steam,
The steam generated by the steam generator is led to the pressurized fluidized bed boiler
Steam steam driven by the steam
In PFBC plant is composed of a bottle, before
The compressed air generated by the air compressor is supplied to the gas turbine
From the gas turbine exhaust gas to the steam generator
And a bypass pipe for guiding the compressed air to the steam generator is provided.
And a control valve is provided in the bypass pipe.
Things. Further, the pressurized fluidized bed plant of the present invention,
Gas turbine and air pressure driven by the gas turbine
Compressed air from the compressor and coal and air compressor
A pressurized fluidized-bed boiler for producing a combustion gas;
Gas turbine exhaust gas passing through the gas turbine driven by the
A steam generator for performing heat exchange with the heat and generating steam,
The steam generated by the steam generator is led to the pressurized fluidized bed boiler
Steam steam driven by the steam
In a pressurized fluidized bed plant consisting of
The combustion gas generated in the pressurized fluidized bed boiler is
Of gas turbine exhaust gas from the turbine to the steam generator
A second passage for communicating said combustion gas to said steam generator
A bypass pipe is provided, and a second control pipe is provided in the second bypass pipe.
It is characterized by providing a control valve. The above purpose
In order to achieve the following, in the present invention, the following pressurized flow
A method for operating a floor plant is provided. That is, the present invention
The operation of a pressurized fluidized bed plant is based on gas turbine and gas
An air compressor driven by a turbine, coal and air
Compressed air is supplied from the compressor to generate combustion gas.
Pressurized fluidized bed boiler and the gas driven by the combustion gas
Heat exchange with gas turbine exhaust gas passing through
A steam generator for generating air,
The heated steam is led to the pressurized fluidized bed boiler to produce heated steam,
And a steam turbine driven by heated steam.
The method of operating a pressurized fluidized bed plant,
The compressed air generated by the compressor is
The turbine exhaust gas is communicated with the path leading to the steam generator,
The compressed air is led to the steam generator, and the compressed air is
Controlling by a load request signal for a moving bed plant
It is characterized by the following. Gas turbine and gas turbine
Air compressors driven by compressors and coal and air compressors
Fluidized bed which is supplied with compressed air and generates combustion gas
A boiler and the gas turbine driven by the combustion gas
Heat exchange with gas turbine exhaust gas passing through
Steam generator to be generated, and steam generated by the steam generator.
The heated steam is led to the pressurized fluidized-bed boiler,
Pressurized flow composed of steam turbine driven by air
The method of operating a moving bed plant, wherein the pressurized fluidized bed
Combustion gas generated by the gas turbine from the gas turbine
The turbine exhaust gas is communicated with the path leading to the steam generator,
The combustion gas is led to the steam generator, and the combustion gas is compressed.
Controlling by a load request signal for a moving bed plant
It is characterized by the following.

[0011]

According to the present invention, the transient flow and pressure changes of the air and gas systems at the time of load drop can be kept within specified ranges, so that stable fluid combustion is maintained and surge of the air compressor is maintained. It is possible to prevent intrusion into the area, maintain the power balance between the gas turbine and the air compressor, and operate the load at a high plant load change rate.

[0012]

An embodiment of the present invention will be described below with reference to FIG.

As shown in FIG. 1, the pressurized fluidized bed plant mainly includes a pressurized fluidized bed boiler 14, an air compressor 1, a gas turbine 2, steam turbines 5, 6, and generators 3, 7 as main components. Be composed.

The pressurized fluidized-bed boiler 14 includes an air compressor 1
The air 21 is compressed and introduced as high-pressure air 22. In addition, coal is separately supplied (not shown), and combustion is performed using high-pressure air, so that high-temperature combustion gas 23 is obtained. The high-temperature combustion gas 23 is supplied to the gas turbine 2 and expands, and drives the air compressor 1 and the generator 3. afterwards,
The gas turbine exhaust gas 24 is supplied to a feed water heater 10 by a feed water 36.
After the heat exchange, the exhaust gas 25 is finally released as low-temperature gas turbine exhaust gas 25 into the atmosphere. On the other hand, the feed water heater 10
Is supplied to the pressurized fluidized-bed boiler 14, and becomes high-temperature high-pressure steam 31 by the heat of combustion of the coal in the pressurized fluidized-bed boiler 14, and is sent to the high-pressure steam turbine 5 to cause the high-pressure steam turbine 5 to operate. Drive rotationally. Further, the expanded low-temperature reheat steam 32 is sent again to the pressurized fluidized-bed boiler 14, where heat is recovered to form a high-temperature reheat steam 33, sent to the reheat steam turbine 6, and the reheat steam turbine 6 is rotationally driven.
The steam turbines 5 and 6 drive a generator 7 to obtain an electric output. The steam that has worked in the reheat steam turbine 6 becomes low-temperature low-pressure steam 34, which is heat-exchanged with seawater 35 in the condenser 8, condensed, and condensed. The condensate is pressurized by a high-pressure water supply pump 9 installed at the outlet of the condenser 8 and sent to the above-described feed water heater 10.

In this embodiment, as a means for controlling the pressure and flow rate of the high-pressure air supply system when the load drops, a part of the discharge air of the air compressor 1 is extracted from the high-pressure air supply system, and the pressurized fluidized-bed boiler is used. 14 pressure or combustion air 2
And controlling at least one of the two flow rates. Specifically, FIG.
, A pipe line communicating from the discharge side of the air compressor 1 to the exhaust part of the gas turbine 2 and a bleed air flow control valve 41 on this pipe line, and the bleed air flow control valve 41 is opened when the load drops and compressed. Some of the air is not sent to the pressurized fluidized bed boiler 14. The bleed air flow control valve 41 is
The opening is controlled in accordance with a load request signal instructed to the pressurized fluidized bed plant.

[0016]

In the embodiment of the system configuration shown in FIG . 1 , at least one of the pressure in the pressurized fluidized-bed boiler 14 and the flow rate of the combustion air 22 can be controlled, and the transient state of the air / gas system at the time of load reduction is achieved. These can quickly follow changes in the flow rate and pressure. This figure
The method shown in FIG. 1 is not effective when the load increases. To increase or increase the pressure in the pressurized fluidized-bed boiler 14 or the flow rate of the combustion air 22 rapidly when the load is increased, it is necessary to employ another method. It is effective to provide a separate air booster different from the air compressor 1 and supply air from outside when the load rises to increase the transient flow rate and pressure.

[0018] As the method of operating in the manner shown in FIG. 1, when lowering the load, transient flow of precompressed air supply system, to previously obtain the change characteristics of the pressure, the load when the load drops By controlling the bleed air flow rate of the discharge air of the air compressor 1 in advance according to the change rate, the delay of the pressure and flow rate of the compressed air supply system with respect to the flow rate of the discharge air of the air compressor 1 falls within a specified range. It can be. When increasing the load, the transient flow rate of the compressed air
The change characteristic of the pressure is obtained in advance, and the air supply flow rate from the outside to the discharge section of the air compressor 1 is controlled in advance according to the load change rate at the time of load increase, so that the discharge air of the air compressor 1 is controlled. Not only can the pressure and flow delays be within the specified range, but also
Effective heat recovery of the heated compressed air by steam generator
It can be performed.

Next, a method of directly operating the flow rate or pressure in the pressurized fluidized-bed boiler when the load changes will be described with reference to FIG .

In the system shown in FIG . 2 , a bypass line from the pressurized fluidized-bed boiler pressure vessel 4 to the exhaust part of the gas turbine 2 is provided.
And an air flow control valve 43 on these lines.
The pressure in the pressurized fluidized-bed boiler 14 or the combustion air 22
By controlling at least one of the flow rates, the transient flow and pressure changes of the air and gas
These can be quickly followed.

When the load rises, the pressurized fluidized-bed boiler pressure vessel 4 is provided with the separate air pressure booster described with reference to FIG. It is effective to control

As for the operation method, similarly to the embodiment of FIG. 1 , the bleed air flow rate from the pressurized fluidized bed boiler pressure vessel 4 and the air supply flow rate to the pressurized fluidized bed boiler pressure vessel 4 are determined in advance. By controlling, the delay of the pressure and the flow rate with respect to the flow rate of the air discharged from the air compressor 1 can be set within a specified range.

Next, a method for taking measures in the gasification fuel supply system will be described with reference to FIG .

In this system, a bypass line is provided from the middle of the pipe of the gasification fuel supply system communicating from the pressurized fluidized bed boiler 14 to the gas turbine 2 to the exhaust part of the gas turbine 2. By providing a combustion gas flow control valve 45 on this conduit, the pressure at the inlet of the gas turbine 2 or the combustion gas 23
Control at least one of the flow rates. As a result, it is possible to promptly follow the transient flow and pressure changes of the air and gas systems when the load drops. These valves are opened when the load drops, and the flow rate of the combustion gas extracted from the outlet of the pressurized fluidized-bed boiler 14 is controlled in advance as in the case of the above-described embodiment. In the case of the method of FIG.
Unlike the systems shown in FIGS. 1 and 2 , since the gasified fuel is released to the atmosphere, it is necessary to provide a dust removal device and perform sufficient dust removal processing before the gas is released to the atmosphere. Further, it is necessary to take measures such as burning the gasified fuel by the combustor before releasing it to the atmosphere, so that the fuel is not released to the atmosphere.

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

Finally, the embodiment of FIG. 4 will be described.
This figure comprises a pressurized fluidized-bed boiler pressure vessel 4 and a pressure vessel 16 separate from the pressurized fluidized-bed boiler pressure vessel 4, and comprises a line connecting the two pressure vessels and an air flow control device 48. Further, the gas turbine 2 is supplied from the pressurized fluidized-bed boiler 14.
A bypass valve 49 and a bypass line to the exhaust part of the gas turbine 2 are provided in the middle of a pipeline communicating with the gas turbine 2. An expansion turbine 18 different from the gas turbine 2, an air booster 17 mechanically connected to the expansion turbine 18 uniaxially, and a pipeline connecting the air booster 17 and a separately disposed pressure vessel 16 to the bypass line. By controlling at least one of the pressure at the inlet of the gas turbine 2 and the flow rate of the combustion gas 23, these are promptly followed by transient changes in the flow rate and pressure in the air and gas system when the load drops. be able to.

At the time of load reduction, the flow rate of the combustion gas extracted from the pressurized fluidized bed boiler 14 to the expansion turbine 18 from the middle of the pipe connecting to the gas turbine 2 is controlled. Here, the energy held by the combustion gas is effectively used to drive the air booster 17 which is mechanically and uniaxially coupled to the expansion turbine 18 to separate the combustion air for the next load increase. In the pressure vessel 16. On the other hand, when the load increases, the residual pressure in the separately provided pressure vessel 16 is effectively used, and air is supplied directly or by a separately provided air booster. As in the above-described embodiment, the operating method is such that the flow rate of the combustion gas bleed from the outlet of the pressurized fluidized bed boiler 14 is controlled in advance when the load drops, and the pressurized fluidized bed is controlled in advance when the load increases. By controlling the flow rate of the air supplied to the boiler pressure vessel 4, the delay in the pressure and flow rate of the system with respect to the flow rate of the air discharged from the air compressor 1 can be kept within specified ranges.

It should be noted that the present invention is not limited to the individual embodiments shown in FIGS. 1 to 4 , but can be implemented by appropriately combining a plurality of methods.

In short, according to the present invention, the compressed air supplied to the pressurized fluidized-bed boiler or the gasified fuel discharged from the pressurized fluidized-bed boiler is adjusted in accordance with the load change.
That is, when measures are taken on the compressed air side, the amount of compressed air supplied to the pressurized fluidized bed boiler is reduced when the load is reduced, and the amount of compressed air supplied to the pressurized fluidized bed boiler is increased when the load is increased.

According to the present invention, The flow rate of extracted air extracted from the air supply system or the pressurized fluidized bed boiler is changed.

2. The flow rate of the extracted combustion gas extracted from the combustion gas supply system or the pressurized fluidized bed boiler is changed.

[0037]

[0038]

Thus, at least one of the transient pressure and flow rate at the time of load change can be made variable.

Finally, the theoretical background that the load change can be performed stably and at high speed by adopting the above control method will be described. In a pressurized fluidized bed conband plant, in order to maintain fluidization from rated to partial load in a stable state and cause a combustion reaction, the amount of combustion air or the amount of combustion gas in the furnace, or the amount of combustion gas at the furnace outlet is required. The ratio with the pressure in each state must be the same as the rated load within the specified control range, and the furnace superficial velocity must be kept constant. FIG. 5 shows the constant conditions of the superficial velocity from the rating to the partial load. On the other hand, even in the transient state when the load changes, in order to maintain the fluidization in a stable state and cause the combustion reaction, the superficial velocity in the furnace must be maintained within the specified control range. It is necessary to control the ratio between the amount of air, the amount of combustion gas in the furnace, or the amount of combustion gas at the furnace outlet and the pressure in each state. However, when the flow rate of the air compressor is decreased or increased at the time of load change, the furnace inlet air flow rate and gas turbine inlet gas flow rate are larger than the air compressor outlet flow rate due to the large capacity of the pressurized fluidized bed boiler pressure vessel. It shows characteristics that are delayed in time. On the other hand, since the pressure of the air and gas systems is determined by the gas turbine inlet,
The furnace inlet pressure and the air compressor discharge pressure show characteristics that are temporally delayed with respect to the air compressor outlet flow rate, similarly to the change in the gas turbine inlet gas flow rate. Compressor outlet air, furnace combustion air,
The transient characteristics of the weight flow rate and pressure of the combustion gas at the inlet of the gas turbine, and the transient characteristics of the flow velocity in the boiler are shown for a load drop .
FIG. 6 shows the state when the load is increased. As shown in FIG. 6 , the furnace superficial velocity at the time of the load drop transiently decreases with respect to the furnace superficial velocity at the time of the load setting, and as shown in FIG. It is known that the speed rises transiently with respect to the furnace superficial velocity at the time of load stabilization, and the furnace superficial superficial velocity becomes out of the specified control range, which may cause abnormal combustion and ash scattering.

The following control means is effective to control the transient superficial velocity in the furnace when the load changes. At the time of load reduction, air is discharged from the air compressor, air is blown to the gas turbine exhaust from at least one point of the pressure vessel of the pressurized fluidized bed boiler, and the pipe connecting the pressurized fluidized bed boiler and the gas turbine. In addition, by increasing the opening of the nozzle provided at the gas turbine inlet, the in-furnace superficial velocity can be controlled within a specified control range.
When the load rises, separate from the pressurized fluidized bed boiler pressure vessel in at least one place of the air compressor discharge, the pressurized fluidized bed boiler pressure vessel, and the pipeline connecting the pressurized fluidized bed boiler and the gas turbine. The high-pressure air is supplied by a pressure vessel or an air pressure booster separate from the gas turbine air compressor, and the opening speed of the nozzle provided at the gas turbine inlet is reduced to regulate the superficial velocity in the furnace. It can be controlled within the control range.

Further, due to the delay of the compressor outlet air pressure with respect to the change of the compressor outlet air flow rate at the time of the load drop shown in FIG. 6 , there is a possibility that the compressor enters the surging region of the air compressor as shown in FIG. is there. In order to prevent the dangerous operation of the gas turbine air compressor at the time of such a load drop, the pressure of the air compressor discharge should be reduced promptly in response to the decrease in the air compressor flow rate, or the air compressor flow rate should be reduced. It is necessary to reduce the pressure of the discharge of the air compressor while keeping the pressure constant. At least one of the pipes connecting the discharge of the air compressor, the pressure vessel of the pressurized fluidized-bed boiler, and the pipe connecting the pressurized fluidized-bed boiler and the gas turbine is used. The above object can be achieved by blowing air or extracting air to the gas turbine exhaust portion and increasing the opening of a nozzle provided at the gas turbine inlet.

Further, as shown in FIG.
Due to the delay of the gas flow rate at the inlet of the gas turbine with respect to the flow rate of the air compressor when the load rises, the ratio between the required power of the air compressor and the power generated by the gas turbine at a load change differs from that at the time of load setting. The response shows that the gas turbine output increases and the gas turbine output decreases transiently when the load increases.

In order to avoid such a reverse response of the gas turbine output, in order to keep the ratio between the required power of the air compressor and the power generated by the gas turbine when the load changes, the flow rate through the air compressor and the air It is necessary to control at least one of the compressor discharge pressure, the gas flow at the gas turbine inlet, and the pressure. At the time of load drop, air is blown to the air or exhaust to the gas turbine exhaust from at least one part of the air compressor, the pressurized fluidized bed boiler pressure vessel, the pipeline connecting the pressurized fluidized bed boiler and the gas turbine, and the gas turbine inlet. By making the opening of the nozzle provided in the section variable, at the time of load increase, at least one of the lines connecting the air compressor discharge, the pressurized fluidized-bed boiler pressure vessel, and the pressurized fluidized-bed boiler to the gas turbine. High pressure air is supplied to the location by a pressure vessel separate from the pressurized fluidized bed boiler pressure vessel or an air booster separate from the gas turbine air compressor, and the opening of the nozzle provided at the gas turbine inlet is adjusted. By making it variable, the above object can be achieved.

As described above, by the means, the gas turbine air compressor outlet air, the pressurized fluidized-bed boiler pressure vessel high-pressure air, the pressurized fluidized-bed boiler furnace combustion gas, and the gas turbine It is possible to change at least one of the transient pressure and flow rate when the load of the inlet combustion gas changes, to maintain a stable combustion reaction, prevent the surge area from entering the air compressor, and The imbalance of the power of the air compressor can be avoided, and the operability of the pressurized fluidized-bed plant at the time of load change can be improved.

[0046]

According to the present invention, the following effects can be obtained.

According to the present invention, the pressure in the pressurized fluidized-bed boiler
Or the combustion air flow rate can be controlled,
For transient changes in gas system flow and pressure, these
Not only can follow up quickly, but also
Compressed air heated to a high temperature at the time of
The unique effect of this application that heat recovery can be performed effectively
To play.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention for bypassing high-pressure air.

FIG. 2 One embodiment of the present invention that bypasses high-pressure air.

FIG. 3 One embodiment of the present invention that bypasses combustion gas.

FIG. 4 Modification Example of the present invention in which another pressure vessel is installed.

FIG. 5 The relationship between pneumatic gas pressure and air or gas volume
FIG.

FIG. 6 FIG. 4 is a transient characteristic diagram at the time of a load drop.

FIG. 7 FIG. 4 is a transient characteristic diagram when the load increases.

FIG. 8 The air compressor characteristic diagram.

FIG. 9 FIG. 4 is a graph showing gas turbine output characteristics when a load changes.

[Explanation of symbols]

1 ... air compressor, 2 ... gas turbine, 3, 7 ... generator,
4 ... Pressurized fluidized-bed boiler pressure vessel, 5, 6 ... Steam turbine, 41 ... Air compressor discharge air bypass flow rate control valve.

Continued on the front page (72) Inventor Takashi Asao 3-2-1 Sachimachi, Hitachi City, Ibaraki Prefecture Within Hitachi Engineering Co., Ltd. (72) Kanzo Sato 3-1-1 Sachimachi, Hitachi City, Ibaraki Prefecture Co., Ltd. Hitachi, Ltd. Hitachi Plant (72) Inventor Sumihito Hasa 3-2-1 Sachimachi, Hitachi City, Ibaraki Prefecture Within Hitachi Engineering Co., Ltd. (56) References JP-A-58-85322 (JP, A) JP-A Sho 58-143129 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) F01K 23/10

Claims (4)

(57) [Claims] 1. A gas turbine, an air compressor driven by the gas turbine, a pressurized fluidized bed boiler supplied with coal and compressed air from the air compressor to generate a combustion gas ,
Gas passing through the gas turbine driven by the combustion gas
Steam generation that generates heat by exchanging heat with turbine exhaust gas
A breeder and steam generated by the steam generator,
The steam is led to the boiler and is driven by the heated steam.
Is the PFBC plant is composed of a steam turbine, the compressed air generated by the air compressor, said gas turbine
From the gas turbine exhaust gas to the steam generator.
A bypass pipe through which the compressed air is led to the steam generator
And a control valve is provided in the bypass pipe.
PFBC plant to be. 2. A gas turbine, an air compressor driven by the gas turbine, a pressurized fluidized bed boiler supplied with coal and compressed air from the air compressor to generate a combustion gas ,
Gas passing through the gas turbine driven by the combustion gas
Steam generation that generates heat by exchanging heat with turbine exhaust gas
A breeder and steam generated by the steam generator,
The steam is led to the boiler and is driven by the heated steam.
Is the PFBC plant is composed of a steam turbine, the combustion gases generated in said pressurized fluidized bed boiler, the gas
Guide gas turbine exhaust gas from steam turbine to steam generator
A second passage communicating with the passage for guiding the combustion gas to the steam generator;
And a second bypass pipe is provided in the second bypass pipe.
A pressurized fluidized bed plant comprising a control valve . 3. A gas turbine, an air compressor driven by the gas turbine, a pressurized fluidized bed boiler supplied with coal and compressed air from the air compressor to generate a combustion gas ,
Gas passing through the gas turbine driven by the combustion gas
Steam generation that generates heat by exchanging heat with turbine exhaust gas
A breeder and steam generated by the steam generator,
The steam is led to the boiler and is driven by the heated steam.
The method of operating a PFBC plant is a steam turbine Toka et arrangement, the compressed air generated by the air compressor, said gas turbine
From the gas turbine exhaust gas to the steam generator.
Through the compressed air to the steam generator.
Gas is controlled by the load request signal to the pressurized fluidized bed plant.
A method for operating a pressurized fluidized-bed plant , characterized by comprising the steps of : 4. A gas turbine, an air compressor driven by the gas turbine, a pressurized fluidized bed boiler supplied with coal and compressed air from the air compressor to generate a combustion gas ,
Gas passing through the gas turbine driven by the combustion gas
Steam generation that generates heat by exchanging heat with turbine exhaust gas
A breeder and steam generated by the steam generator,
The steam is led to the boiler and is driven by the heated steam.
The method of operating a PFBC plant is composed of a steam turbine, the combustion gases generated in said pressurized fluidized bed boiler, the gas
Guide gas turbine exhaust gas from steam turbine to steam generator
Leading the combustion gas to the steam generator in communication with a
Load request signal to the fluidized bed plant pressurizing the combustion gas
A method for operating a pressurized fluidized-bed plant, characterized in that the method is controlled by :