JP2006207558A - Back pressure extraction steam turbine facility and its operating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a back pressure extraction steam turbine facility and its operating method for effectively suppressing windage loss while maintaining effective utilization of a back pressure of a turbine extract and a turbine exhaust steam without impairing conventional functions. <P>SOLUTION: The back pressure extraction steam turbine facility of the present invention is composed of the back pressure extraction steam turbine 100, a steam generator 107 for supplying steam to the back pressure extraction steam turbine 100 via a first steam header 109, and a plurality of extraction steam/exhaust steam headers 111, 112 being supplied with extracted steam or exhausted steam from the extraction back pressure steam turbine 100. Means 109, 117 111, 128 for supplying low-temperature steam are also provided, when the final stage of the back pressure extraction steam turbine 100 is overheated due to windage loss. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bleed back pressure steam turbine facility and an operation method thereof that effectively suppresses the inside of a turbine casing from being overheated due to windage loss during rotation of a turbine rotor (rotating shaft).

  The extracted back pressure steam turbine is a turbine that extracts steam from the turbine intermediate stage (extracts) and uses the extracted steam and the turbine exhaust that has finished the expansion work in the turbine stage as process steam in a factory or the like.

  This extracted back pressure steam turbine may be used, for example, as a process steam in a desalination plant combined with a combined cycle power plant, and there is a configuration shown in FIG.

  The combined cycle power plant 1 includes an air compressor 2, a gas turbine combustor 3, a gas turbine 4, a generator 5, and a steam generator (exhaust heat recovery boiler) 6. The air compressor 2 sucks in air (air). The compressed high pressure air is supplied to the gas turbine combustor 3 together with the fuel from the fuel valve 7 to generate the combustion gas, and the generated combustion gas is expanded by the gas turbine 4. The generator 5 is driven by the generated power (rotational torque), and the gas turbine exhaust gas (exhaust heat) that has finished the expansion work is supplied to the steam generator 6 as a heat source, from a condensate water supply system (not shown). Steam is generated by exchanging heat in the water supply.

  Further, the steam generator 6 of the combined cycle power plant 1 is used via a first steam header 8, a bleed back pressure steam turbine 10 directly connected to the generator 9, a second steam header 11, and a low pressure steam header 12. The steam generated is connected to each of the freshwater plant A13a and freshwater plant B13b, for example, and the generated steam is once collected in the first steam header 8 via the steam supply pipe 15 having the high-pressure header inlet valve 14 interposed. From here, it is supplied to each of the second steam header 11 and the low-pressure bypass pipe 20 provided with the low-pressure bypass valve 19 via the intermediate-pressure bypass pipe 17 provided with the intermediate-pressure bypass valve 16.

  On the other hand, the extraction back pressure steam turbine 10 causes the steam supplied from the first steam header 8 through the main steam pipe 22 provided with the main steam valve 21 to perform expansion work and the power (rotation) generated at that time. The generator 9 is driven by torque, and the turbine exhaust that has finished the expansion work is supplied to the low-pressure steam header 12 through an exhaust pipe 24 having an exhaust valve 23 in the middle.

  Further, the extraction back pressure steam turbine 10 supplies the steam extracted (extracted) from the turbine intermediate stage to the second steam header 11 via the extraction pipe 26 provided with the extraction valve 25 in the middle.

  In this way, among the steam collected in each of the second steam header 11 and the low-pressure steam header 12, steam having a relatively high pressure is an intermediate-pressure steam feed provided with an intermediate-pressure steam feed valve 27 on the way. The steam having a relatively low pressure is supplied via the trachea 28 to the fresh water plant A13a, and is supplied to the fresh water plant B13b via the low pressure steam air supply pipe 30 provided with the low pressure steam air supply valve 29 on the way. Water collected from the ocean or the like at each of A13a and fresh water generation plant B13b is generated as drinking water, greening water, or the like.

  By the way, not only a desalination plant but the extraction back pressure steam turbine 10 applied, for example, for supplying process steam such as pulp, effectively uses the back pressure of the turbine exhaust that has finished expansion work in the turbine stage for the process plant. Since it is used, the exhaust stage (final stage of the turbine) is not evacuated.

  For this reason, in the extraction back pressure steam turbine 10, during no-load operation or low-load operation, a windage loss due to rotational friction occurs between the rotating turbine blades and the steam, and the windage causes a temperature inside the turbine casing. Rises. Due to the temperature rise in the turbine casing, the turbine component is overheated, and excessive thermal stress is locally generated, sometimes exceeding the allowable limit.

  Conventionally, in condensing turbines, the condenser that communicates with the exhaust stage is evacuated to condense the turbine exhaust further and generate condensate, but wind damage still occurs during low-load operation, etc. In some cases, the turbine component is overheated.

For this reason, even if it is a condensate turbine, as seen, for example in Unexamined-Japanese-Patent No. 56-107905 (patent document 1), a high pressure turbine bypass system is utilized, and the steam from a high pressure turbine bypass system is used as a high pressure turbine. Back flow from the outlet side of the turbine toward the inlet side of the high-pressure turbine prevents overheating of the turbine parts due to windage.
JP-A-56-107905

  As disclosed in Patent Document 1, even in a condensate turbine that maintains the exhaust stage in a vacuum, wind damage occurs during low-load operation with a small amount of steam, and countermeasures are taken. For this reason, the extracted back pressure steam turbine is also required to take measures against windage damage, maintain the strength of the turbine parts at a high level, and ensure stable operation.

  At that time, the extraction back pressure steam turbine suppresses the wind loss while maintaining the state in which the back pressure of the turbine exhaust can be effectively utilized without providing a condenser that takes away the heat of the turbine exhaust as in the conventional case. Countermeasures are required.

  The present invention has been made in view of such a background art, and an extraction back that effectively suppresses windage loss while maintaining effective use of turbine bleed air and turbine exhaust back pressure without impairing conventional functions. It is an object of the present invention to provide a pressure steam turbine facility and an operation method thereof.

  In order to achieve the above-mentioned object, the extraction back pressure steam turbine equipment according to the present invention includes an extraction back pressure steam turbine and a first steam header in the extraction back pressure steam turbine as described in claim 1. In the extraction back pressure steam turbine equipment comprising a steam generator for supplying steam via a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine, the extraction back pressure steam turbine When the last stage of the turbine is overheated due to windage, a means for supplying low-temperature steam is provided.

  Further, in order to achieve the above object, the extraction back pressure steam turbine equipment according to the present invention is characterized in that the means for supplying low-temperature steam is a temperature reducer as described in claim 2. To do.

  Further, in order to achieve the above-described object, the extraction back pressure steam turbine equipment according to the present invention has a temperature reducer comprising a first steam header and an extraction back pressure steam turbine. It was installed in between.

  Further, in order to achieve the above-mentioned object, the extraction back pressure steam turbine equipment according to the present invention provides a temperature reducer between the steam generator and the first steam header. It was installed in.

  Moreover, in order to achieve the above-mentioned object, the extraction back pressure steam turbine equipment according to the present invention includes an extraction back pressure steam turbine and a first steam in the extraction back pressure steam turbine as described in claim 5. In the extraction back pressure steam turbine facility comprising a steam generator for supplying steam via a header, and a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine, the extraction back pressure A temperature detector is provided in the steam turbine, and a controller for adjusting the temperature of the steam from the steam generator based on a signal from the temperature detector is provided.

  Moreover, in order to achieve the above-mentioned object, the extraction back pressure steam turbine equipment according to the present invention provides the extraction back pressure steam turbine and the extraction back pressure steam turbine with the first steam. In the extraction back pressure steam turbine equipment comprising a boiler for supplying steam via a header and a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine, the extraction back pressure steam turbine And a control device for providing a valve opening / closing signal to a fuel valve for supplying fuel to the boiler based on a signal from the temperature detector.

  Moreover, in order to achieve the above-mentioned object, the extraction back pressure steam turbine equipment according to the present invention includes an extraction back pressure steam turbine and a first steam in the extraction back pressure steam turbine as described in claim 7. In the extraction back pressure steam turbine facility comprising a steam generator for supplying steam via a header, and a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine, the extraction back pressure A temperature detector and a pressure detector are provided in the steam turbine, and the relationship between the pressure in the extraction back pressure steam turbine determined in advance and the temperature rise due to windage, and the upper temperature limit allowable for the extraction back pressure steam turbine, And a control device to which a signal from each detector is input, and based on the temperature calculated from the temperature from the temperature detector or the pressure from the pressure detector It is to regulate the steam temperature from serial steam generator.

  Further, in order to achieve the above-mentioned object, the operation method of the extraction back pressure steam turbine facility according to the present invention includes the extraction back pressure steam turbine and the extraction back pressure steam turbine as described in claim 8. In the extraction back pressure steam turbine equipment comprising a steam generator for supplying steam via one steam header, and a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine, In this method, the steam sent to the first steam header is caused to flow back to the extracted back pressure steam turbine through a second steam header and an extraction pipe connected to the second steam header.

  The extraction back-pressure steam turbine equipment and the operation method thereof according to the present invention are provided in an extraction back-pressure steam turbine in order to prevent the turbine component in the final stage of the turbine from being overheated by windage before the extraction operation. Since the means for supplying steam having a relatively low temperature is provided, the temperature rise of the turbine component can be quickly and reliably suppressed, and stable operation of the extraction back pressure steam turbine can be maintained for a long time.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a bleed back pressure steam turbine facility and an operation method thereof according to the present invention will be described with reference to the drawings and reference numerals attached to the drawings.

  1 to 6 exemplify a heat source of the steam generator 107 using a gas turbine plant, the present invention is not limited to this, and heat corresponding to the capacity of the steam generator is supplied. As long as it is possible, the form is not particularly limited, and it may be heat from a nuclear reactor, heat from various boilers, geothermal heat, solar heat collection, or the like.

  Similarly, although a plant in which a desalination plant is installed as a process side plant is illustrated, the present invention is not limited to this and may be a very general manufacturing factory, petrochemical plant, or the like.

  FIG. 1 is a schematic system diagram showing a first embodiment of the extracted back pressure steam turbine equipment and the operation method thereof according to the present invention.

  The extraction back pressure steam turbine 100 according to the present invention has a configuration in which a combined cycle power plant 101 and a desalination plant 102 are combined as an example.

  The combined cycle power plant 101 includes an air compressor 103, a gas turbine combustor 104, a gas turbine 105, a generator 106, and a steam generator (exhaust heat recovery boiler) 107. The air compressor 103 sucks in air (air). The compressed high-pressure air is supplied to the gas turbine combustor 104 together with the fuel from the fuel valve 108 to generate the combustion gas, and the generated combustion gas is expanded by the gas turbine 105. The generator 106 is driven by the generated power (rotational torque), the gas turbine exhaust gas (exhaust heat) that has finished the expansion work is supplied to the steam generator 107 as a heat source, and the water is exchanged to generate steam. Yes.

  Further, the steam generator 107 of the combined cycle power plant 101 includes a first steam header 109, a bleed back pressure steam turbine 100 directly connected to the generator 110, a second steam header 111 as a bleed / exhaust steam header, a low pressure steam. A steam supply pipe 114 is connected to each of the process side plants having different steam pressures to be used via the header 112, for example, each of the fresh water generation plant A 102a and the fresh water generation plant B 102b, and the generated steam is provided with a high pressure header inlet valve 113. Is sent to the first steam header 109, from here through the intermediate pressure bypass pipe 117 interposing the intermediate pressure bypass valve 116, the second steam header 111 and the low pressure bypass pipe 119 interposing the low pressure bypass valve 118 Supply to each.

  On the other hand, the extraction back pressure steam turbine 100 causes the steam supplied from the first steam header 109 through the main steam pipe 120 provided with the main steam valve 115 to perform expansion work and the power (rotation) generated at that time. The generator 110 is driven by torque), and the turbine exhaust that has finished the expansion work is supplied to the low-pressure steam header 112 through an exhaust pipe 122 having an exhaust valve 121 in the middle.

  Further, the extraction back pressure steam turbine 100 supplies the turbine extraction extracted from the intermediate stage of the turbine to the second steam header 111, and an extraction pipe 128 provided with an extraction valve 127 is provided in the middle. Then, the relatively high-pressure steam collected in the first steam header 109 is supplied to the desalination plant A 102a via the intermediate-pressure steam supply valve 123 and the intermediate-pressure steam supply pipe 124, and the low-pressure steam header. The steam having a relatively low pressure collected in 112 is supplied to the fresh water generation plant B 102b through the low-pressure steam supply valve 125 and the low-pressure steam supply pipe 126, respectively.

  An operation method of the extraction back pressure steam turbine equipment having such a configuration will be described.

  As described above, the extraction back-pressure steam turbine 100 during the no-load operation or the low-load operation and before the extraction operation has a small amount of steam. Therefore, during the rotation of the turbine rotor blade, the agitation of the air in the turbine casing is performed. Wind damage occurs and turbine components are overheated.

  Therefore, in the present embodiment, the intermediate pressure steam supply valve 123 of the intermediate pressure steam supply pipe 124 is closed and the intermediate pressure bypass valve 116 of the intermediate pressure bypass pipe 117 before the extraction operation at the time of no load or low load operation. The extraction valve 127 of the extraction pipe 128, the exhaust valve 121 of the exhaust pipe 122, and the main steam valve 115 of the main steam pipe 120 are each opened, and the steam supplied from the main steam pipe 120 to the extraction back pressure steam turbine 100 is converted to steam. The steam supplied from the first steam header 109 through the intermediate pressure bypass valve 116 of the intermediate pressure bypass pipe 117, the second steam header 111, and the extraction valve 127 of the extraction pipe 128 is joined.

  By this merging, the steam supplied from the main steam pipe 120 to the extraction back pressure steam turbine 100 decreases the temperature, and suppresses the temperature increase in the final stage (exhaust stage) of the extraction back pressure steam turbine 100.

  As described above, the present embodiment uses the existing extraction pipe 128 to supply the second steam header 111 from the intermediate pressure bypass pipe 117 during no-load or low-load operation before the extraction operation of the extraction back-pressure steam turbine. As shown in the arrow E, the steam to be flowed back is supplied to the extraction back pressure steam turbine, and is combined with the steam supplied from the main steam pipe 120 to the extraction back pressure steam turbine to lower the steam temperature. The temperature rise of the turbine components in the final stage (exhaust stage) of the back pressure steam turbine 100 can be easily and reliably suppressed by simple means, and the stable operation of the extraction back pressure steam turbine can be maintained for a long time.

  FIG. 2 is a schematic system diagram showing a second embodiment of the extracted back pressure steam turbine equipment and the operation method thereof according to the present invention. In addition, the same code | symbol is attached | subjected to the component same as the component of 1st Embodiment.

  In the extraction back pressure steam turbine 100 according to the present embodiment, when the steam from the first steam header 109 is subjected to expansion work, a temperature reducer 129 is provided in the main steam pipe 120 that supplies the steam.

  As described above, in the present embodiment, the temperature reduction device 129 is provided in the main steam pipe 120 that connects the extraction back pressure steam turbine 100 to the first steam header 109, and the extraction back pressure steam turbine 100 is connected from the first steam header 109. Since the temperature of the relatively high temperature steam supplied to the engine is reduced, the temperature rise of the turbine component in the final stage (exhaust stage) of the extraction back pressure steam turbine can be easily and reliably suppressed by simple means, The stable operation of the extraction back pressure steam turbine can be maintained for a long time.

  In the present embodiment, the temperature reducing device 129 is provided in the main steam pipe 120 that connects the extraction back pressure steam turbine 100 to the first steam header 109. However, the present invention is not limited to this example. For example, as shown in FIG. Further, the temperature reducer 109 may be provided in the steam supply pipe 114 that connects the first steam header 109 to the steam generator 107. This is effective in that low-temperature steam can be supplied directly to the extraction back-pressure steam turbine 100.

  FIG. 4 is a schematic system diagram showing a fourth embodiment of the extracted back pressure steam turbine equipment and the operation method thereof according to the present invention. In addition, the same code | symbol is attached | subjected to the component same as the component of 1st Embodiment.

  In the extraction back pressure steam turbine 100 according to the present embodiment, a temperature detector 130 is provided on the outlet side of the turbine final stage (exhaust stage), and the temperature signal detected by the temperature detector 130 exceeds a predetermined temperature. A control device 131 for calculating the valve opening / closing signal and supplying the calculated signal to the fuel valve 108 of the gas turbine combustor 104 to control the fuel valve 108 is provided.

  As described above, in the present embodiment, the temperature detector 130 is provided on the outlet side of the final stage (exhaust stage) of the extraction back pressure steam turbine 100, and the temperature at the time of no load or low load before the extraction operation is started. When the detected temperature signal from the detector 130 exceeds a predetermined set value, a control device 131 is provided for calculating a valve opening / closing signal and supplying the calculated signal to the fuel valve 108 to control the fuel valve 108. The fuel supplied from the valve 108 to the gas turbine combustor 104 is adjusted, and the temperature of the steam from the steam generator 107 is adjusted based on the temperature adjustment of the exhaust gas (exhaust heat) supplied from the gas turbine 105 to the steam generator 107. Since it is configured, it is possible to easily and reliably suppress the temperature rise of the turbine component in the final stage (exhaust stage) of the extraction back pressure steam turbine. It is possible to maintain the stable operation longer.

  In the present embodiment, the combined back cycle power plant 101 and the desalination plant 102 are combined with the extraction back pressure steam turbine 100, and the temperature of the final stage (exhaust stage) of the extraction back pressure steam turbine 100 is set in advance. The control device 131 for adjusting the valve opening degree of the fuel valve 108 that supplies fuel to the gas turbine combustor 104 is provided, but the present invention is not limited to this example. For example, as shown in FIG. Steam power plant 134, specifically, the valve opening degree of fuel valve 133 that supplies fuel to boiler 132 is adjusted, and temperature rise in the final stage (exhaust stage) of extracted back-pressure steam turbine 100 is suppressed. At this time, the temperature detector 130 and the control device 131 described above may be applied.

  FIG. 6 is a schematic system diagram showing a sixth embodiment of the extracted back pressure steam turbine equipment and the operation method thereof according to the present invention. In addition, the same code | symbol is attached | subjected to the component same as the component of 1st Embodiment.

  The extraction back pressure steam turbine 100 according to the present embodiment performs valve opening / closing control in advance for the fuel valve 108 that supplies fuel to the gas turbine combustor 104 even when the temperature of the final stage (exhaust stage) of the turbine rapidly increases. A control device 136 is provided so as to be able to.

  In the conventional extraction back pressure steam turbine 100, even if the temperature of the final stage (exhaust stage) of the turbine rises rapidly, there is a signal delay or the like, and the fuel valve 108 that supplies fuel to the gas turbine combustor 104 is opened. It was difficult to adjust the degree quickly and appropriately.

  The present embodiment takes such circumstances into consideration, and the extraction back pressure steam turbine 100 is provided with the temperature detector 130 and the pressure detector 135 and the overheating allowable temperature due to the windage loss of the extraction back pressure steam turbine 100 in advance. A control device 136 that stores the relationship between the pressure of the final stage of the extraction back-pressure steam turbine 100 and the temperature rise due to the windage loss at the pressure and stores it as a table together with the value is provided. The temperature of the steam generator 107 is controlled by a signal.

  Specifically, when the temperature from the temperature detector 130 exceeds the overheat allowable temperature value, or calculated based on the table value stored in the control device 135 by the pressure value from the pressure detector 135. When the temperature value exceeds the allowable overheating temperature value, a control signal for restricting the fuel valve 108 of the gas turbine combustor 104 is sent from the controller 135 to lower the temperature of the combustion gas from the gas turbine 105. The steam temperature of the steam generator 107 can be lowered.

  With such a configuration, the temperature of the fuel gas generated in the gas turbine combustor 104 is lowered and supplied to the steam generator 107, so that steam having a low temperature is supplied to the extraction back pressure steam turbine 100 in the steam generator 107. Since it is supplied, the temperature rise in the turbine final stage (exhaust stage) of the extraction back pressure steam turbine 100 can be suppressed. Moreover, since control is performed using not only the temperature value but also the pressure value, the temperature can be managed with higher accuracy.

  In addition, the temperature and pressure history for a certain time may be stored in the control device 135, and the temperature or pressure trend may be obtained by obtaining a differential value from these history values. Therefore, the temperature can be controlled with higher accuracy and speed.

  When cooling the turbine components in the final stage (exhaust stage) of the extraction back pressure steam turbine 100, the cooling steam is gradually decreased from zero to the rated speed as shown in FIG. From here, for example, it may be set to zero before the bleed operation, or may be lowered stepwise as shown in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic system | strain diagram which shows 1st Embodiment of the extraction back pressure steam turbine installation which concerns on this invention, and its operating method. The schematic system diagram which shows 2nd Embodiment of the extraction back pressure steam turbine installation which concerns on this invention, and its operating method. The schematic system diagram which shows 3rd Embodiment of the extraction back pressure steam turbine installation and its operating method which concern on this invention. The schematic system diagram which shows 4th Embodiment of the extraction back pressure steam turbine installation which concerns on this invention, and its operating method. The schematic system diagram which shows 5th Embodiment of the extraction back pressure steam turbine installation and its operating method which concern on this invention. The schematic system diagram which shows 6th Embodiment of the extraction back pressure steam turbine installation which concerns on this invention, and its operating method. In the extraction back pressure steam turbine equipment and its operating method concerning the present invention, when supplying the steam for cooling to the last stage of a turbine, the diagram which shows reducing steam for cooling continuously. In the extraction back pressure steam turbine equipment and its operating method concerning the present invention, when supplying the steam for cooling to the last stage of a turbine, it is a diagram which shows reducing the steam for cooling in steps. The schematic system diagram which shows the conventional extraction back pressure steam turbine installation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combined cycle power plant 2 Air compressor 3 Gas turbine combustor 4 Gas turbine 5 Generator 6 Steam generator 7 Fuel valve 8 First steam header 9 Generator 10 Extraction back pressure steam turbine 11 Second steam header 12 Low pressure Steam header 13a desalination plant A
13b Water production plant B
14 High pressure header inlet valve 15 Steam supply pipe 16 Medium pressure bypass valve 17 Medium pressure bypass pipe 19 Low pressure bypass valve 20 Low pressure bypass pipe 21 Low pressure bypass pipe 21 Main steam valve 22 Main steam pipe 23 Exhaust valve 24 Exhaust pipe 25 Extraction valve 26 Extraction pipe 27 Medium pressure Steam supply valve 28 Medium pressure steam supply pipe 100 Extraction back pressure steam turbine 101 Combined cycle power plant 102 Water production plant 102a Water production plant A
102b desalination plant B
103 Air Compressor 104 Gas Turbine Combustor 105 Gas Turbine 106 Generator 107 Steam Generator 108 Fuel Valve 109 First Steam Header 110 Generator 111 Second Steam Header 112 Low Pressure Steam Header 113 High Pressure Header Inlet Valve 114 Steam Supply Pipe 115 Main Steam Valve 116 Medium Pressure Bypass Valve 117 Medium Pressure Bypass Pipe 118 Low Pressure Bypass Valve 119 Low Pressure Bypass Pipe 120 Main Steam Pipe 121 Exhaust Valve 122 Exhaust Pipe 123 Medium Pressure Steam Supply Valve 124 Medium Pressure Steam Supply Pipe 125 Low Pressure Steam Supply Valve 126 Low-pressure steam supply pipe 127 Extraction valve 128 Extraction pipe 129 Temperature reducer 130 Temperature detector 131 Controller 131 Boiler 133 Fuel valve 134 Steam power plant 135 Pressure detector 136 Controller

Claims (8)

An extraction back pressure steam turbine;
A steam generator for supplying steam to the extracted back pressure steam turbine via a first steam header;
In the extraction back pressure steam turbine equipment comprising a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine, the turbine final stage of the extraction back pressure steam turbine is overheated due to windage damage. A bleed back-pressure steam turbine facility comprising means for supplying low-temperature steam when it becomes. The extraction back pressure steam turbine equipment according to claim 1, wherein the means for supplying the low-temperature steam is a temperature reducer. 3. The extraction back pressure steam turbine equipment according to claim 2, wherein the temperature reducer is installed between the first steam header and the extraction back pressure steam turbine. The extraction back pressure steam turbine equipment according to claim 2, wherein the temperature reducer is installed between the steam generator and the first steam header. An extraction back pressure steam turbine;
A steam generator for supplying steam to the extracted back pressure steam turbine via a first steam header;
In the extraction back-pressure steam turbine facility comprising a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine,
A bleed back pressure steam turbine facility comprising a temperature detector in the bleed back pressure steam turbine and a control device for adjusting a steam temperature from the steam generator based on a signal from the temperature detector. . An extraction back pressure steam turbine;
A boiler for supplying steam to the extracted back pressure steam turbine via a first steam header;
In the extraction back-pressure steam turbine facility comprising a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine,
The extracted back pressure steam turbine is provided with a temperature detector, and a control device for providing a valve opening / closing signal to a fuel valve for supplying fuel to the boiler based on a signal from the temperature detector. Steam turbine equipment. An extraction back pressure steam turbine;
A steam generator for supplying steam to the extracted back pressure steam turbine via a first steam header;
In the extraction back-pressure steam turbine facility comprising a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine,
The extraction back pressure steam turbine is provided with a temperature detector and a pressure detector,
The relationship between the pressure in the extraction back-pressure steam turbine determined in advance and the temperature rise due to windage and the upper temperature limit allowable for the extraction back-pressure steam turbine are stored, and signals from the detectors are stored. An input control device,
The extraction back pressure steam turbine equipment, wherein the steam temperature from the steam generator is adjusted based on the temperature calculated from the temperature from the temperature detector or the pressure from the pressure detector. An extraction back pressure steam turbine;
A steam generator for supplying steam to the extracted back pressure steam turbine via a first steam header;
In the extraction back-pressure steam turbine facility comprising a plurality of extraction exhaust steam headers supplied with extraction steam or exhaust steam from the extraction back pressure steam turbine,
Extraction back pressure, wherein the steam sent to the first steam header is caused to flow back to the extraction back pressure steam turbine through a second steam header and an extraction pipe connected to the second steam header. Operation method of steam turbine equipment.

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