KR20100035171A - Steam turbine installation - Google Patents

Abstract

Provided is steam turbine equipment that enables the turbine equipment to be increased in size while inhibiting the possibility of vibration generation and a significant increase in equipment cost even when the steam temperature adopted is 650°C or higher. In a steam turbine equipment having a high-pressure turbine, an intermediate-pressure turbine, and a low-pressure turbine, the high-pressure turbine is separated into a first high-pressure turbine unit on the high-temperature, high-pressure side and a second high-pressure turbine unit on the low-temperature, low-pressure side; the intermediate-pressure turbine is separated into a first intermediate-pressure turbine unit on the high-temperature, high-pressure side and a second intermediate-pressure turbine unit on the low-temperature, low-pressure side; the first high-pressure turbine unit and the first intermediate-pressure turbine unit are integrated to configure a first integrated unit; the second high-pressure turbine unit and the second intermediate-pressure turbine unit are integrated to configure a second integrated unit; and at least one of the rotors or the casing of the turbine, into which steam at 650°C or above is introduced, is configured by joining multiple members formed of an Ni-based alloy by welding.

Description

Steam Turbine Installations {STEAM TURBINE INSTALLATION}

The present invention relates to a steam turbine installation having a high pressure turbine, a medium pressure turbine and a low pressure turbine.

At present, three main methods of nuclear power, thermal power, and hydro power are used as the main power generation methods. From the viewpoint of resource amount and energy density, the three power generation methods are expected to be used as main power generation methods in the future. Among them, thermal power generation is a safe and high-response power generation method, and it is expected to continue to play an important role in the power generation field.

Steam turbine facilities used for coal-fired power generation, including steam turbines, generally include a high pressure turbine, a medium pressure turbine, and a low pressure turbine. In such a steam turbine installation, the steam of 600 degreeC is used, The part exposed to high temperature, such as a rotor and a casing (car compartment) of a high pressure turbine or a medium pressure turbine, has heat resistance with respect to the steam of 600 degreeC. Ferritic materials having excellent economic efficiency are used.

However, in recent years, in order to reduce CO ₂ emissions and further improve thermal efficiency, a technique employing steam conditions of 650 ° C, and even 700 ° C, is required. Therefore, Patent Document 1 discloses a steam turbine installation capable of operating at a high temperature of 650 ° C. or higher in reheat steam conditions.

FIG. 14 shows a schematic system diagram of a conventional steam turbine installation disclosed in Patent Document 1. As shown in FIG. The steam turbine power generation equipment 110 shown in FIG. 14 separates the medium pressure turbine into the first medium pressure turbine 112 on the high temperature and high pressure side, and the second medium pressure turbine 114 on the low temperature and low pressure side, and the high pressure turbine 116 and The second medium pressure turbine 114 is integrated to form an integrated cargo 122, and the integrated cargo 122 is connected to the first medium pressure turbine 112, the low pressure turbine 124, and the generator 126 on the high temperature and high pressure side. They are connected together on the same axis.

The main steam superheated at 600 ° C. in the boiler 132 is introduced into the high pressure turbine 116 via the main steam pipe 134. The steam introduced into the high pressure turbine 116 is exhausted after performing the expansion operation, and returned to the boiler 132 via the low temperature reheating tube 138. The steam returned to the boiler 132 is reheated by the boiler 132 to become a steam of 700 ° C., and is sent to the first medium pressure turbine 112 through the high temperature reheating tube 140. The rotor of this 1st medium pressure turbine 112 is comprised from the material (austenitic heat-resistant steel) which can withstand high temperature steam of 700 degreeC grade. The steam which expanded by the 1st medium pressure turbine 112 falls to 550 degreeC grade, and is exhausted, and is sent to the 2nd medium pressure turbine 114 via the medium pressure part communication pipe 142. FIG. The steam sent to the second medium pressure turbine 114 is exhausted after performing the expansion operation, and introduced into the low pressure turbine 124 through the crossover pipe 144. The steam introduced into the low pressure turbine 124 is exhausted after the expansion operation and is sent to the condenser 128. The steam sent to the condenser 128 is condensed in the condenser 128, boosted by the feed pump 130, and returned to the boiler 132. The generator 126 is rotationally driven to generate power by the expansion operation of each turbine.

In such a steam turbine installation, a medium pressure turbine is divided and only the 1st medium pressure turbine 112 uses the material which can endure 650 degreeC or more steam, and it is possible to employ | adopt the steam conditions of 650 degreeC or more, and 650 degreeC The amount of materials that can withstand the above vapors is reduced to reduce the manufacturing cost of the entire facility.

However, in the technique disclosed in Patent Document 1, since a material capable of withstanding steam of 650 ° C or higher is not used for the high-pressure turbine, it cannot be coped with when steam of 650 ° C or higher is used for the main steam.

In addition, considering a large-capacity steam turbine facility, it is difficult to realize the facility shown in FIG. For example, when Ni-based alloys capable of withstanding steam above 650 ° C. to constitute the first medium pressure turbine 112 are used, it is difficult to manufacture a turbine rotor or casing (vehicle) of 10 t or more in view of material production limitations. This is because a large turbine rotor or casing cannot be manufactured.

Therefore, as shown in FIG. 15, it is also possible to further divide the 1st medium pressure turbine 112 into the 1st 1-2 medium pressure turbine 113, but in that case, the increase of the number of compartments, and of the building and piping accompanying it The problem arises that the increase in manufacturing cost of the equipment increases. In addition, a problem arises that the number of shafts (the number of divided turbines) increases, so that the possibility of vibrations increases.

It is also possible to use a ferritic material without using a Ni-based alloy, but in this case, it is necessary to introduce a large amount of cooling steam into the vehicle compartment, and the turbine internal efficiency is lowered.

(Patent Document 1) Japanese Patent Publication No. 4094208

Therefore, in view of such a problem of the prior art, the present invention provides a steam turbine facility that can increase the size of a facility by suppressing the possibility of vibration generation or a significant increase in the cost of a facility even when steam conditions of 650 ° C. or higher are employed. For the purpose of

In order to solve the above problems, in the present invention,

In a steam turbine installation having a high pressure turbine, a medium pressure turbine and a low pressure turbine, the high pressure turbine is separated into a first high pressure turbine part on the high temperature high pressure side and a second high pressure turbine part on the low temperature low pressure side, and the medium pressure turbine is separated from the high temperature high pressure side. At least the second high pressure turbine part, comprising a first integrated part in which the first medium pressure turbine part and the second medium pressure turbine part on the low temperature and low pressure side are integrated, and the first high pressure turbine part and the first medium pressure turbine part are integrated. And at least one of the rotor and the casing of the turbine on the steam introduction side into which the second integration unit incorporating the second medium pressure turbine unit is integrated, and at least 650 ° C or more steam is introduced into the first high pressure turbine unit and the first medium pressure turbine unit. While forming from a Ni-based alloy, at least one of the entire rotor and the entire casing of the turbine is joined by welding a rotor member or casing member made of a plurality of materials by welding. It is characterized in that configuration.

In this manner, at least one of the rotor and the casing of the turbine into which steam of 650 ° C. or higher is introduced is formed of a Ni-based alloy, and at least one of the entire rotor and the casing of the turbine is formed of a rotor member or casing of a plurality of materials. By joining the members by welding, even if the high-pressure turbine and the medium-pressure turbine are steam conditions in which steam of 650 ° C. or higher is introduced, the equipment is not increased without increasing the number of compartments, the number of shafts (the number of divided turbines) and the blade stages. Can be enlarged.

Moreover, in such a facility, 650 degreeC or more steam is introduce | transduced into the said 1st high pressure turbine and the 1st medium pressure turbine. Therefore, Ni group which is an advanced material is integrated by integrating a 1st high pressure turbine and a 1st medium pressure turbine, and the steam of less than 650 degreeC is introduce | transduced, and the 2nd high pressure turbine and the 2nd medium pressure turbine which can be comprised with a ferrite type material are integrated. By reducing the amount of alloy used, it is possible to suppress a significant increase in equipment costs. In addition, since at least one of the rotor and the casing of the turbine into which the steam of 650 ° C or higher is introduced is used a Ni-based alloy, it is not necessary to introduce a large amount of cooling steam into the turbine, which leads to an improvement in the internal efficiency of the turbine.

Moreover, you may form the ultrahigh pressure turbine which introduces the steam of higher pressure than the steam introduce | transduced into the said high pressure turbine, and may connect the ultrahigh pressure turbine, the said 1st integrated part, the 2nd integrated part, and the low pressure turbine on the same axis.

This makes it possible to further pressurize the steam.

Moreover, while steam | steam 650 degreeC or more is introduce | transduced into the 1st high pressure turbine part and the 1st medium pressure turbine part which comprise the said 1st integration part, and the 2nd high pressure turbine part and 2nd medium pressure turbine part which comprise the said 2nd integration part are carried out. The vapor | steam below 650 degreeC is introduce | transduced, and the said 2nd integrated part and the low pressure turbine are connected in the axis | shaft separate from the said 1st integrated part, and it is more than the said body of the said 2nd integrated part and the low pressure turbine. You may arrange | position a 1st integrated part in the position close to the boiler which overheats the steam introduced into the said high pressure turbine and the medium pressure turbine.

By arranging the first high pressure turbine section and the first medium pressure turbine section into which the steam of 650 ° C. or higher is introduced near the boiler, the pipe length connecting the boiler and the first high pressure turbine section and the boiler and the first medium pressure turbine section can be shortened. The material used for the piping can be reduced. The piping connecting the boiler to the first high pressure turbine section and the boiler and the first medium pressure turbine section has to be made of Ni-based alloy, which is a high-quality material because steam of 650 ° C. or higher flows, but shortens the piping to reduce material usage. This makes it possible to reduce the production cost of the entire facility.

Moreover, you may form the ultrahigh pressure turbine which introduces the steam of high pressure rather than the steam introduce | transduced into the said high pressure turbine, and may connect the said 1st integrated part and the said ultrahigh pressure turbine on the same axis.

This makes it possible to further pressurize the steam.

Moreover, in the said 2nd integration part in the steam turbine installation of any said structure, you may integrate the said low pressure turbine further. As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced.

Moreover, in the steam turbine installation provided with the high pressure turbine, the medium pressure turbine, and the low pressure turbine, the said high pressure turbine is isolate | separated into the 1st high pressure turbine part of a high temperature high pressure side, and the 2nd high pressure turbine part of a low temperature low pressure side, and the said medium pressure turbine is a high temperature. The first high pressure turbine is divided into a first medium pressure turbine part on the high pressure side and a second medium pressure turbine part on the low temperature low pressure side, and constitutes a first integration part in which the first high pressure turbine part and the first medium pressure turbine part are integrated. At least one of the rotor and the casing of the turbine and the casing on the steam introduction side into which the part and the first medium-pressure turbine section at least 650 ° C. steam is introduced is formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is plural. The rotor member or the casing member of a material is joined by welding, and is comprised, It is characterized by the above-mentioned. Moreover, you may integrate a 2nd medium pressure turbine and a low pressure turbine.

By not integrating the second high pressure turbine and the second medium pressure turbine, it is easy to cope with the increase in capacity.

In addition, by integrating the second medium pressure turbine and the low pressure turbine, the vehicle number and the number of shafts can be reduced, and the cost of equipment can be reduced.

Moreover, in the steam turbine installation provided with the high pressure turbine, the medium pressure turbine, and the low pressure turbine WHEREIN: The turbine which introduce | transduces the steam below 650 degreeC while connecting the turbine which introduce | transduces 650 degreeC or more steam on the same axis is said 650 degreeC. The steam introduced into the high pressure turbine and the medium pressure turbine is connected to the turbine on which the steam above 650 ° C. or higher is introduced, rather than the turbine into which steam below 650 ° C. is introduced. At least one of the rotor and the casing of the turbine into which the steam above 650 ° C. is introduced is formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is formed of a plurality of materials. The rotor member or the casing member is bonded to each other by welding to be configured.

By arranging a turbine in which steam of 650 ° C or higher is introduced near the boiler, the pipe length connecting the boiler and the turbine in which steam of 650 ° C or higher is introduced can be shortened, and the material used for the piping can be reduced. Since the piping connecting the boiler and the turbine into which steam of 650 ° C or higher is introduced is required to be made of high-quality Ni-based alloy because steam of 650 ° C or higher is circulated, it is necessary to shorten the piping to reduce the amount of material used to reduce the total amount of the entire facility. The manufacturing cost can be reduced.

The rotor or casing member of the turbine into which steam of 650 ° C. or higher is introduced is formed of a Ni-based alloy, and either the entire turbine rotor or the entire casing is joined by welding a rotor member or casing member of a plurality of materials by welding. Thereby, even in the steam condition in which steam of 650 degreeC or more is introduce | transduced into a 1st medium pressure turbine, installation can be enlarged without increasing the number of compartments, the number of shafts, and the number of vanes.

Moreover, in the steam turbine installation provided with the high pressure turbine, the medium pressure turbine, and the low pressure turbine, at least the said high pressure turbine and the medium pressure turbine are integrated, the integrated cargo and the low pressure turbine are connected on the same axis, and the said 650 degreeC or more steam is introduce | transduced. At least one of the rotor and the casing of the turbine is formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is joined by welding to form a rotor member or a casing member of a plurality of materials. do. The high pressure turbine, the medium pressure turbine and the low pressure turbine may be integrated. As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced.

Moreover, you may form the ultrahigh pressure turbine which introduces the steam of high pressure rather than the steam introduce | transduced into the said high pressure turbine, and may connect the said 1st integrated part and the said ultrahigh pressure turbine on the same axis.

This makes it possible to pressurize the new steam.

As described above, according to the present invention, even in the case where steam conditions of 650 ° C. and even 700 ° C. are employed, a steam turbine facility capable of increasing the size of the facility by suppressing the possibility of vibration or a significant increase in the cost of the facility is provided. Can provide.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the steam turbine power generation facility in Example 1. FIG.
It is a figure which shows the structure of the steam turbine power generation facility which changed the some form in Example 1. FIG.
It is a figure which shows the structure of the steam turbine power generation facility which changed the some form in Example 1. FIG.
It is a figure which shows the structure of the steam turbine power generation facility which changed the some form in Example 1. FIG.
FIG. 5 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 2. FIG.
It is a figure which shows the structure of the steam turbine power generation facility which changed some forms in Example 2. FIG.
FIG. 7 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 3. FIG.
It is a figure which shows the structure of the steam turbine power generation facility which changed one part form in Example 3. FIG.
9 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 4. FIG.
It is a figure which shows the structure of the steam turbine power generation facility which changed one part form in Example 4. FIG.
It is a figure which shows the structure of the steam turbine power generation facility in Example 5. FIG.
It is a figure which shows the structure of the steam turbine power generation facility in Example 6. FIG.
It is a figure which shows the structure of the steam turbine power generation facility in Example 7. FIG.
It is a figure which shows the structure of the steam turbine power generation facility in a prior art example.
It is a figure which shows the structure of the steam turbine power generation facility in another conventional example.

To practice the invention  Form for

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this embodiment are not intended to limit the scope of the present invention to them unless otherwise specified, and are merely illustrative examples.

Example 1

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the steam turbine power generation facility in Example 1. FIG.

With reference to FIG. 1, the power generation installation comprised by the steam turbine installation which concerns on Example 1 is demonstrated.

The steam turbine power generation equipment 10 shown in FIG. 1 is a high pressure turbine divided into two as described later, a medium pressure turbine divided into two as described later, a low pressure turbine 24, a generator 26, and a condenser 28. It consists mainly of the boiler 32. The high pressure turbine is separated into a first high pressure turbine 16 on the high temperature high pressure side and a second high pressure turbine 18 on the low temperature low pressure side, and the medium pressure turbine is a first medium pressure turbine 12 on the high temperature high pressure side and a low temperature low pressure side. It is separated by the 2nd medium pressure turbine 14 of the 1st, The 1st high pressure turbine 16 and the 1st medium pressure turbine 12 are integrated, and it forms the unified cargo 20, The 2nd high pressure turbine 18 and the 1st The dual medium pressure turbine 14 is integrated to form the integrated cargo 22.

Moreover, the said integrated cargo 20, the integrated cargo 22, the low pressure turbine 24, and the generator 26 are comprised so that it may be connected on the same axis.

At least one of the rotor and the casing of the first high pressure turbine 16 and the first medium pressure turbine 12 is formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is formed of a rotor of a plurality of materials. The member or the casing member is joined by welding and is comprised.

The main steam superheated at 650 ° C. or higher in the boiler 32 is introduced into the first high pressure turbine 16 through the main steam pipe 34. The steam introduced into the first high pressure turbine 16 is exhausted after the expansion operation, becomes steam of less than 650 ° C., is introduced into the second high pressure turbine 18 via the high pressure part communication pipe 36, and the second high pressure. After the expansion operation is performed in the turbine, the gas is exhausted and returned to the boiler 32 through the low temperature reheating pipe 38. The steam returned to the boiler 32 is reheated in the boiler 32 to become steam of 650 ° C or higher, and is sent to the first medium pressure turbine 12 through the high temperature reheating tube 40. The steam which performed expansion operation in the 1st medium pressure turbine 12 falls to 550 degreeC grade, is exhausted, and is sent to the 2nd medium pressure turbine 14 via the medium pressure part communication pipe 42. The steam sent to the second medium pressure turbine 14 is exhausted after performing the expansion operation, and is sent to the low pressure turbine 24 through the crossover pipe 44. The steam introduced into the low pressure turbine 24 is exhausted after the expansion operation and sent to the condenser 28. The steam sent to the condenser 28 is condensed by the condenser 28, boosted by the feed water pump 30, and returned to the boiler 32. The generator 26 is rotationally driven to generate electricity by the expansion operation of each turbine.

According to the steam turbine power generation apparatus 10 of the form of Example 1 mentioned above, at least the rotor and the casing of the turbine (the 1st high pressure turbine 16 and the 1st medium pressure turbine 12) into which steam 650 degreeC or more is introduce | transduced. By joining a plurality of members formed of Ni-based alloys by welding, one of the first high-pressure turbines 16 and the medium-pressure turbine 12 increases the size of the equipment without increasing the number of cars, the number of shafts, or the number of blade ends. can do.

Moreover, in such a facility, 650 degreeC or more steam is introduce | transduced into the said 1st high pressure turbine 16 and the 1st medium pressure turbine 12, and it is 650 degreeC in the 2nd high pressure turbine 18 and the 2nd medium pressure turbine 14. Less steam is introduced.

Therefore, at least one of the rotor and the casing which separates both the high pressure turbine and the medium pressure turbine into two, and the steam which is 650 degreeC or more introduce | transduced and joined together by welding the several member formed from Ni-base alloy by welding is used, 1st high pressure turbine 16 and the 1st medium pressure turbine 12 integrally comprise the integrated goods 20, the steam below 650 degreeC is introduce | transduced, and the 2nd high pressure which can be comprised with a ferritic material like conventionally By integrating the turbine 18 and the second medium pressure turbine 14 to form an integrated product, it is possible to reduce the amount of Ni-based alloy that is a high-quality material and to suppress a significant increase in equipment cost. In addition, in the case where the steam temperature introduced is higher than 560 ° C, the second high pressure turbine 18 and the second medium pressure turbine 14 have different materials (for example, 12Cr steel and 2.25Cr steel) in the rotor and the casing. , 12Cr steel, CrMoV steel, etc.), the use of high-quality materials only in parts requiring high temperature strength, inexpensive materials can be used in parts that do not require high temperature strength, thereby minimizing the use of high-quality materials. .

In addition, as shown in FIG. 2, by combining the second high pressure turbine 18, the second medium pressure turbine 14, and the low pressure turbine 24 to form the integrated cargo 21, the vehicle number and the number of axes can be reduced. This can reduce equipment cost. In addition, the use of dissimilar materials (for example, 12Cr steel, 2.25Cr steel, 3.5Ni steel, 9Cr steel, 2.25Cr steel, 3.5Ni steel, etc.) in the rotor or casing of the integral cargo 21 can minimize the use of high-quality materials. have.

On the other hand, it can also be set as the structure which does not integrate the 2nd high pressure turbine 18 and the 2nd medium pressure turbine 14, as shown in FIG.

In addition, with respect to the example shown in FIG. 3, as shown in FIG. 4, by combining the second medium pressure turbine 14 and the low pressure turbine 24 to form the integrated cargo 23, the vehicle number and the number of shafts can be reduced. This can reduce equipment cost. In addition, the use of dissimilar materials (for example, 12Cr steel and 2.25Cr steel and 3.5Ni steel, 9Cr steel and 2.25Cr steel and 3.5Ni steel, etc.) in the rotor or casing of the integral cargo 23 can minimize the use of high-quality materials. have.

[Example 2]

FIG. 5 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 2. FIG.

The steam turbine power generation facility 10 shown in FIG. 5 is a form which changed the steam turbine power generation facility of the form of Example 1 shown in FIG. 1, and a part, and is an integrated cargo 22, the low pressure turbine 24, and the generator 26. As shown in FIG. ) Is configured to be connected on the same axis, and the integrated cargo 20 and the generator 27 are configured and arranged to be connected on the same axis at a position closer to the boiler 32 than that. The monolith 20 is preferably closer to the boiler 32.

All other things are the same as the steam turbine power generation facility of the form of Example 1. FIG.

According to the steam turbine power generation facility 10 of the form of Example 2 mentioned above, in addition to the effect of the form of Example 1, the 1st high pressure turbine 16 and the 1st medium pressure turbine 12 which steam 650 degreeC or more are introduce | transduced. ) Is arranged close to the boiler 32, the pipe length connecting the boiler 32 and the first high pressure turbine 16 and the boiler 32 and the first medium pressure turbine 12 can be shortened. The material used for piping can be reduced. Since the piping connecting the boiler 32 and the first high pressure turbine 16 and the boiler 32 and the first medium pressure turbine 12 is 650 ° C. or more in circulation, it is necessary to produce a Ni-based alloy which is a high-quality material. However, by shortening the pipe and reducing the amount of material used, the manufacturing cost of the entire facility can be reduced.

Moreover, similarly to the example shown in FIG. 2, the 2nd high pressure turbine 18, the 2nd medium pressure turbine 14, and the low pressure turbine 24 can be integrated, and an integrated cargo can be comprised (not shown). As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced. In addition, the use of dissimilar materials (for example, 12Cr steel, 2.25Cr steel, 3.5Ni steel, 9Cr steel, 2.25Cr steel, 3.5Ni steel, etc.) in the rotor or casing of the integral cargo 21 can minimize the use of high-quality materials. have.

On the other hand, it can also be set as the structure which does not integrate the 2nd high pressure turbine 18 and the 2nd medium pressure turbine 14 by large capacity.

6, the 2nd medium pressure turbine 14 and the low pressure turbine 24 can be integrated, and the integrated cargo can be comprised like the example shown in FIG. 4 (not shown). As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced. In addition, by employing a welding structure of dissimilar materials (for example, 12Cr steel, 2.25Cr steel, 3.5Ni steel, 9Cr steel, 2.25Cr steel, 3.5Ni steel, etc.) in the rotor or casing of the integral cargo 23, the use of high-quality materials can be minimized. Can be.

Example 3

FIG. 7 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 3. FIG.

With reference to FIG. 7, the power generation equipment comprised by the steam turbine installation which concerns on Example 3 is demonstrated.

The steam turbine power generation equipment 10 shown in FIG. 7 includes an ultra high pressure turbine 19, a high pressure turbine divided into two as described later, a medium pressure turbine divided into two as described later, a low pressure turbine 24, and a generator 26. ), The condenser 28 and the boiler 32 are mainly comprised. The high pressure turbine is separated into a first high pressure turbine 16 on the high temperature and high pressure side and a second high pressure turbine 18 on the low temperature and low pressure side, and the medium pressure turbine is a first medium pressure turbine 12 and a low temperature low pressure on the high temperature and high pressure side. It is separated by the 2nd medium pressure turbine 14 of the side, The 1st high pressure turbine 16 and the 1st medium pressure turbine 12 are integrated, and it forms the unified cargo 20, The 2nd high pressure turbine 18, The second medium pressure turbine 14 is integrated to form an integrated product 22.

Moreover, the ultrahigh pressure turbine 19, the said integrated cargo 20, the integrated cargo 22, the low pressure turbine 24, and the generator 26 are comprised so that it may be connected on the same axis.

The rotors of the ultrahigh pressure turbine 19, the first high pressure turbine 16, and the first medium pressure turbine 12 are formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is formed of a rotor of a plurality of materials. The member or the casing member is joined by welding and is comprised.

The main steam superheated at 650 ° C. or higher in the boiler 32 is introduced into the ultrahigh pressure turbine 19 through the main steam pipe 33. The steam introduced into the ultra-high pressure turbine 19 is exhausted after the expansion operation, and is returned to the boiler 32 via the low temperature reheating pipe 35 as the steam is less than 650 ° C. The steam returned to the boiler 32 is reheated in the boiler 32 to become steam of 650 ° C. or higher, and is introduced into the first high pressure turbine 16 through the high temperature reheating tube 34. The steam introduced into the first high pressure turbine 16 is exhausted after the expansion operation, becomes steam of less than 650 ° C, is introduced into the second high pressure turbine 18 via the high pressure part communication pipe 36, and the second high pressure. After the expansion operation is performed in the turbine, the gas is exhausted and returned to the boiler 32 through the low temperature reheating pipe 38. The steam returned to the boiler 32 is reheated in the boiler 32 to become steam of 650 ° C or higher, and is sent to the first medium pressure turbine 12 through the high temperature reheating tube 40. The steam which expanded by the 1st medium pressure turbine 12 falls to 550 degreeC grade, and is exhausted, and is sent to the 2nd medium pressure turbine 14 via the medium pressure part communication pipe 42. The steam sent to the second medium pressure turbine 14 is exhausted after performing the expansion operation, and is sent to the low pressure turbine 24 through the crossover pipe 44. The steam introduced into the low pressure turbine 24 is exhausted after the expansion operation and sent to the condenser 28. The steam sent to the condenser 28 is condensed by the condenser 28, boosted by the feed water pump 30, and returned to the boiler 32. The generator 26 is rotationally driven to generate electricity by the expansion operation of each turbine.

According to the steam turbine power generation facility 10 of the form of Example 3 mentioned above, the turbine (super high pressure turbine 19, the 1st high pressure turbine 16, the 1st medium pressure turbine 12) into which steam 650 degreeC or more is introduce | transduced is introduced. At least one of the rotor and the casing is formed by joining a plurality of members formed of a Ni-based alloy by welding, so that any of the ultrahigh pressure turbine, the first high pressure turbine 16, and the medium pressure turbine 12 can be occupied by the vehicle, the number of shafts and the blades. The equipment can be enlarged without increasing the number of stages. In addition, by forming the ultra-high pressure turbine 19, higher pressure steam can be used.

Moreover, in such a facility, the steam of 650 degreeC or more is introduce | transduced into the said ultra-high pressure turbine 19, the 1st high pressure turbine 16, and the 1st medium pressure turbine 12, and the 2nd high pressure turbine 18 and the 2nd medium pressure turbine were carried out. Steam (14) is introduced into (14).

Therefore, at least one of the rotor and the casing in which both the high pressure turbine and the medium pressure turbine are separated into two, and steam 650 ° C. or more is introduced to join a plurality of members formed of Ni-based alloys by welding is used. The high pressure turbine 16 and the first medium pressure turbine 12 are integrated to form an integrated cargo 20 to be connected to the ultra high pressure turbine 19, and steam of less than 650 ° C is introduced, and the ferrite-based material as in the prior art. By integrating the second high pressure turbine 18 and the second medium pressure turbine 12 that can be configured to form the integrated cargo 22, the amount of Ni-based alloy which is a high-quality material is reduced, and a significant increase in facility cost is suppressed. can do. In addition, the second high pressure turbine 18 and the second medium pressure turbine 14 have different materials (for example, 12Cr steel, 2.25Cr, 12Cr, CrMoV steel, etc.) in the rotor and the casing when the steam temperature introduced exceeds 560 ° C. By adopting the welding structure of), the amount of high-quality materials is minimized.

2, the second high pressure turbine 18, the second medium pressure turbine 14, and the low pressure turbine 24 can be integrated to form an integrated product (not shown). As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced. In addition, the use of dissimilar materials (for example, 12Cr steel and 2.25Cr steel and 3.5Ni steel, 9Cr steel and 2.25Cr steel and 3.5Ni steel, etc.) in the rotor or casing of the integral cargo can equally minimize the use of high-quality materials.

On the other hand, it can also be set as the structure which does not integrate the 2nd high pressure turbine 18 and the 2nd medium pressure turbine 14, as shown in FIG.

8, the second intermediate pressure turbine 14 and the low pressure turbine 24 can be integrated to form an integrated product (not shown). As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced. In addition, the use of dissimilar materials (for example, 12Cr steel and 2.25Cr steel and 3.5Ni steel, 9Cr steel and 2.25Cr steel and 3.5Ni steel, etc.) in the rotor or casing of the integral cargo can equally minimize the use of high-quality materials.

Example 4

FIG. 9 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 4. FIG.

The steam turbine power generation facility 10 shown in FIG. 9 is a form which changed the steam turbine power generation facility of the form of Example 3 shown in FIG. 7, and a part, and is the integrated cargo 22, the low pressure turbine 24, and the generator 26. As shown in FIG. ) Is configured to be connected on the same axis, and the ultra-high pressure turbine 19, the integrated cargo 20, and the generator 27 are configured and arranged to be connected on the same axis at a position closer to the boiler 32 than that. The ultra high pressure turbine 19 and the integrated product 20 are preferably closer to the boiler 32.

All other things are the same as the steam turbine power generation facility of the form of Example 3.

According to the steam turbine power generation facility 10 of the form of Example 4 mentioned above, in addition to the effect of the form of Example 3, the ultrahigh pressure turbine 19, the 1st high pressure turbine 16 which introduce | transduce 650 degreeC or more steam, and By arranging the first medium pressure turbine 12 near the boiler 32, the boiler 32 and the ultrahigh pressure turbine 19, the boiler 32 and the first high pressure turbine 16 and the boiler 32 and the first The piping length connecting the medium pressure turbine 12 can be shortened, and the material used for the piping can be reduced. Since the piping connecting the boiler 32 and the ultrahigh pressure turbine 19, the boiler 32 and the first high pressure turbine 16, and the boiler 32 and the first medium pressure turbine 12 is 650 ° C or higher, Although it is necessary to manufacture with Ni base alloy which is a high grade material, the production cost of the whole installation can be reduced significantly by shortening the said piping and reducing the amount of material used.

Moreover, similarly to the example shown in FIG. 2, the 2nd high pressure turbine 18, the 2nd medium pressure turbine 14, and the low pressure turbine 24 can be integrated, and an integrated cargo can be comprised (not shown). As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced. In addition, the use of dissimilar materials (for example, 12Cr steel and 2.25Cr steel and 3.5Ni steel, 9Cr steel and 2.25Cr steel and 3.5Ni steel, etc.) in the rotor or casing of the integral cargo can equally minimize the use of high-quality materials.

On the other hand, it can also be set as the structure which does not integrate the 2nd high pressure turbine 18 and the 2nd medium pressure turbine 14, as shown in FIG.

10, the second intermediate pressure turbine 14 and the low pressure turbine 24 can be integrated to form an integrated product, similarly to the example shown in FIG. 4 (not shown). As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced. In addition, the use of dissimilar materials (for example, 12Cr steel and 2.25Cr steel and 3.5Ni steel, 9Cr steel and 2.25Cr steel and 3.5Ni steel, etc.) in the rotor or casing of the integrated cargo can equally minimize the use of high-quality materials.

Example 5

FIG. 11 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 5. FIG.

With reference to FIG. 11, the power generation installation comprised by the steam turbine installation which concerns on Example 5 is demonstrated.

The steam turbine power generation facility 10 shown in FIG. 11 mainly consists of the high pressure turbine 16, the medium pressure turbine 12, the low pressure turbine 24, the generators 26 and 27, the condenser 28, and the boiler 32. do.

Moreover, the high pressure turbine 16, the low pressure turbine 24, and the generator 26 are comprised so that it may be connected on the same axis, and the medium pressure turbine 12 and the generator 27 are the same in the position closer to the boiler 32 than that. It is arranged connected on the axis. The medium pressure turbine 12 is preferably closer to the boiler 32.

At least one of the rotor and the casing of the medium pressure turbine 12 is formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is joined by welding a rotor member or a casing member of a plurality of materials by welding. It is composed.

The main steam superheated below 650 ° C. in the boiler 32 is introduced into the high pressure turbine 16 through the main steam pipe 34. The steam introduced into the high pressure turbine 16 is exhausted after performing the expansion operation and returned to the boiler 32 via the low temperature reheating pipe 38. The steam returned to the boiler 32 is reheated in the boiler 32 to become steam of 650 ° C. or higher, and is sent to the medium pressure turbine 12 through the high temperature reheating tube 40. The steam which performed expansion operation in the medium pressure turbine 12 is exhausted, and is sent to the low pressure turbine 24 via the crossover pipe 44. The steam introduced into the low pressure turbine 24 is exhausted after the expansion operation and sent to the condenser 28. The steam sent to the condenser 28 is condensed by the condenser 28, boosted by the feed water pump 30, and returned to the boiler 32. The generators 26, 27 are driven in rotation by the expansion operation of each turbine to generate power.

According to the steam turbine power generation facility 10 of the form of Example 5 mentioned above, at least any one of the rotor and the casing of the medium pressure turbine 12 into which steam 650 degreeC or more is introduce | transduced the some member formed from Ni-based alloy By joining by welding, the installation can be enlarged without increasing the number of medium-voltage turbines 12, the number of shafts, and the number of blade ends.

Furthermore, by arranging the medium pressure turbine 12 into which the steam of 650 degreeC or more is introduce | transduced near the said boiler 32, the piping length which connects the boiler 32 and the medium pressure turbine 12 can be shortened, and the piping The material to be used can be reduced. The piping connecting the boiler 32 and the medium pressure turbine 12 needs to be made of Ni-based alloy, which is a high-quality material because steam of 650 ° C. or higher flows, but the piping is shortened to reduce the amount of material used, The manufacturing cost can be greatly reduced.

Example 6

12 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 6. FIG.

With reference to FIG. 12, the power generation equipment comprised by the steam turbine installation which concerns on Example 6 is demonstrated.

The steam turbine power generation facility 10 shown in FIG. 12 mainly consists of the high pressure turbine 16, the medium pressure turbine 12, the low pressure turbine 24, the generator 26, the condenser 28, and the boiler 32. As shown in FIG.

Moreover, the high pressure turbine 16, the medium pressure turbine 12, the low pressure turbine 24, and the generator 26 are comprised so that they may be connected on the same axis | shaft. Moreover, the high pressure turbine 16 and the medium pressure turbine are integrated, and are integrated ( 25).

At least one of the rotor and the casing of the high pressure turbine 16 and the medium pressure turbine 12 is formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is formed of a rotor member or casing member of a plurality of materials. Is bonded by welding.

The main steam superheated above 650 ° C. in the boiler 32 is introduced into the high pressure turbine 16 through the main steam pipe 34. The steam introduced into the high pressure turbine 16 is evacuated after the expansion operation, and is returned to the boiler 32 via the low temperature reheating tube 48 as steam below 650 ° C. The steam returned to the boiler 32 is reheated in the boiler 32 to become steam of 650 ° C. or higher and introduced into the medium pressure turbine 12 through the high temperature reheating tube 40. The steam which performed expansion operation in the medium pressure turbine 12 is exhausted, and is sent to the low pressure turbine 24 via the crossover pipe 44. The steam introduced into the low pressure turbine 24 is exhausted after the expansion operation and sent to the condenser 28. The steam sent to the condenser 28 is condensed by the condenser 28, boosted by the feed water pump 30, and returned to the boiler 32. The generator 26 is rotationally driven to generate electricity by the expansion operation of each turbine.

According to the steam turbine power generation facility 10 of the form of Example 6 mentioned above, at least any one of the rotor and the casing of the turbine (high pressure turbine 16, the medium pressure turbine 12) into which steam 650 degreeC or more is introduce | transduced, A plurality of members formed of a Ni-based alloy are joined to each other by welding, and the integrated cargo 25 of the high pressure turbine 16 and the medium pressure turbine 12 is formed to increase the number of compartments, the number of shafts, and the number of vanes. It is possible to increase the size of the equipment without making it work.

Moreover, the high pressure turbine 16, the medium pressure turbine 12, and the low pressure turbine 24 can be integrated, and an integrated cargo can be comprised (not shown). As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced. In addition, the use of dissimilar materials (for example, 12Cr steel and 2.25Cr steel and 3.5Ni steel, 9Cr steel and 2.25Cr steel and 3.5Ni steel, etc.) in the rotor or casing of the integral cargo can equally minimize the use of high-quality materials.

Example 7

FIG. 13 is a diagram illustrating a configuration of a steam turbine power generation facility in Example 7. FIG.

With reference to FIG. 13, the power generation equipment comprised by the steam turbine installation which concerns on Example 7 is demonstrated.

The steam turbine power generation equipment 10 shown in FIG. 13 includes an ultra high pressure turbine 19, a high pressure turbine 16, a medium pressure turbine 12, a low pressure turbine 24, a generator 26, a condenser 28, a boiler 32. It is mainly composed of.

Moreover, the ultrahigh pressure turbine 19, the high pressure turbine 16, the medium pressure turbine 12, the low pressure turbine 24, and the generator 26 are comprised so that it may be connected on the same axis.

At least one of the rotor and the casing of the ultrahigh pressure turbine 19, the high pressure turbine 16, and the medium pressure turbine 12 is formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is formed of a plurality of materials. Rotor member or casing member is joined by welding.

The main steam superheated at 650 ° C. or higher in the boiler 32 is introduced into the ultrahigh pressure turbine 19 through the main steam pipe 33. The steam introduced into the ultra-high pressure turbine 19 is exhausted after the expansion operation, and is returned to the boiler 32 via the low temperature reheating pipe 35 as the steam is less than 650 ° C. The steam returned to the boiler 32 is reheated in the boiler 32 to become steam of 650 ° C. or higher and introduced into the high pressure turbine 16 through the high temperature reheating tube 34. The steam introduced into the high pressure turbine 16 is exhausted after the expansion operation, and is returned to the boiler 32 via the low temperature reheating pipe 38 as steam of less than 650 ° C. The steam returned to the boiler 32 is reheated in the boiler 32 to become steam of 650 ° C. or higher, and is sent to the medium pressure turbine 12 through the high temperature reheating tube 40. The steam which performed expansion operation in the medium pressure turbine 12 is exhausted, and is sent to the low pressure turbine 24 through the crossover pipe 44. The steam introduced into the low pressure turbine 24 is exhausted after the expansion operation and sent to the condenser 28. The steam sent to the condenser 28 is condensed by the condenser 28, boosted by the feed water pump 30, and returned to the boiler 32. The generator 26 is rotationally driven to generate power by the expansion operation of each turbine.

According to the steam turbine generator 10 of the form of Example 7 mentioned above, the rotor and casing of the turbine (super high pressure turbine 19, the high pressure turbine 16, the medium pressure turbine 12) into which steam 650 degreeC or more is introduce | transduced. By joining and forming at least one of the plurality of members formed of a Ni-based alloy by welding, the ultra high pressure turbine 19, the high pressure turbine 16, and the medium pressure turbine 12 can be occupied by the vehicle, the number of shafts, or the number of blade ends. Larger equipment can be achieved without increasing In addition, by forming the ultra-high pressure turbine 19, higher pressure steam can be used.

On the other hand, the high pressure turbine 16, the medium pressure turbine 12, and the low pressure turbine 24 may be integrated, and an integrated cargo may be comprised (not shown). As a result, the number of cars and the number of shafts can be reduced, and the cost of equipment can be reduced. In addition, dissimilar materials (e.g., Ni-based alloys, 12Cr steels, 2.25Cr steels, 3.5Ni steels, Ni-based alloys, 9Cr steels, 2.25Cr steels, 3.5Ni steels, Ni-based alloys, 2.25Cr steels, and 3.5Ni steels) may be used for rotors or casings of integral cargo. Etc.) By employing a welding structure, the amount of high-quality materials can be minimized.

Industrial availability

Even when steam conditions of 650 ° C and even 700 ° C are employed, it can be used as a steam turbine facility that can increase the size of the turbine facility by suppressing the possibility of vibration occurrence and a significant increase in the cost of the facility.

Claims (16)

A steam turbine installation comprising a high pressure turbine, a medium pressure turbine and a low pressure turbine,
The high pressure turbine is separated into a first high pressure turbine part on the high temperature and high pressure side and a second high pressure turbine part on the low temperature and low pressure side,
The medium pressure turbine is separated into a first medium pressure turbine part on the high temperature and high pressure side and a second medium pressure turbine part on the low temperature and low pressure side,
While configuring a 1st integration part which integrated the said 1st high pressure turbine part and the said 1st medium pressure turbine part,
At least a second integral part incorporating the second high pressure turbine part and the second medium pressure turbine part;
At least one of the rotor and the casing of the turbine on the steam introduction side into which the first high-pressure turbine section and the first medium-pressure turbine section at least 650 ° C or more steam is introduced is formed of an Ni-based alloy, and the entire rotor and the casing of the turbine are formed. A steam turbine installation comprising at least one of the whole parts by joining a rotor member or a casing member of a plurality of materials by welding. The method of claim 1,
The said 1st integrated part, the 2nd integrated part, and the low pressure turbine connected on the same axis, The steam turbine installation characterized by the above-mentioned. The method of claim 1,
Forming an ultra-high pressure turbine into which steam of a higher pressure is introduced than steam introduced into the high pressure turbine;
The ultra-high pressure turbine, the said 1st integrated part, the 2nd integrated part, and the low pressure turbine connected on the same axis, The steam turbine installation characterized by the above-mentioned. The method of claim 1,
While introducing the steam of 650 ° C. or higher into the first high pressure turbine part and the first medium pressure turbine part constituting the first integrated part,
A steam of less than 650 ° C. is introduced into a second high pressure turbine part and a second medium pressure turbine part constituting the second integrated part,
While connecting the second integrated part and the low pressure turbine in a separate shaft from the first integrated part,
The said 1st integrated part is arrange | positioned in the position closer to the boiler which superheats the steam which is introduce | transduced into the said high pressure turbine and the medium pressure turbine rather than the connection of the 2nd integrated part and the low pressure turbine. . The method of claim 4, wherein
Forming an ultra-high pressure turbine into which steam of a higher pressure is introduced than steam introduced into the high pressure turbine;
A steam turbine facility characterized by connecting said first integrated part and said ultra-high pressure turbine on the same axis. 6. The method according to any one of claims 1 to 5,
The said 2nd integrated part WHEREIN: The said low pressure turbine was integrated further. The steam turbine installation characterized by the above-mentioned. A steam turbine installation comprising a high pressure turbine, a medium pressure turbine and a low pressure turbine,
The high pressure turbine is separated into a first high pressure turbine part on the high temperature and high pressure side and a second high pressure turbine part on the low temperature and low pressure side,
The medium pressure turbine is separated into a first medium pressure turbine part on the high temperature and high pressure side and a second medium pressure turbine part on the low temperature and low pressure side,
While configuring a 1st integration part which integrated the said 1st high pressure turbine part and the said 1st medium pressure turbine part,
At least one of the rotor and the casing of the turbine on the steam introduction side into which the first high-pressure turbine section and the first medium-pressure turbine section at least 650 ° C. steam is introduced is formed of a Ni-based alloy, and the entire turbine rotor and the entire casing are formed. The steam turbine installation characterized by joining at least one of the rotor members or casing members of multiple materials by welding. The method of claim 7, wherein
The said 1st integrated part, the said 2nd high pressure turbine, the said 2nd medium pressure turbine, and the low pressure turbine connected on the same axis, The steam turbine installation characterized by the above-mentioned. The method of claim 7, wherein
The second high pressure turbine, the second medium pressure turbine and the low pressure turbine are connected to each other to form a connecting body, and the connecting body is connected on a separate shaft from the first integrated part,
The steam turbine installation, characterized in that the first integrated portion is disposed closer to the boiler that superheats the steam introduced into the high pressure turbine and the medium pressure turbine, rather than the connecting body. The method of claim 7, wherein
Forming an ultra-high pressure turbine into which steam of a higher pressure is introduced than steam introduced into the high pressure turbine;
The ultra-high pressure turbine, the said 1st integrated part, the said 2nd medium pressure turbine, and the said low pressure turbine connected on the same axis, The steam turbine installation characterized by the above-mentioned. The method of claim 9,
Forming an ultra-high pressure turbine into which steam of a higher pressure is introduced than steam introduced into the high pressure turbine;
The said 1st integrated part and the said ultra-high pressure turbine connected on the same axis, The steam turbine installation characterized by the above-mentioned. The method according to any one of claims 7 to 11,
The said 2nd medium pressure turbine part and the said low pressure turbine are integrated. The steam turbine installation characterized by the above-mentioned. A steam turbine installation comprising a high pressure turbine, a medium pressure turbine and a low pressure turbine,
While connecting turbines in which steam of 650 ° C. or higher is introduced on the same axis,
A turbine into which steam of less than 650 ° C. is introduced is connected on the same axis as a turbine from which steam of 650 ° C. or more is introduced,
The turbine into which the steam of at least 650 ° C. is introduced is disposed at a position closer to the boiler which superheats the steam introduced into the high pressure turbine and the medium pressure turbine than the turbine into which the steam of less than 650 ° C. is introduced,
At least one of the rotor and the casing of the turbine into which the steam of 650 ° C. or more is introduced is formed of a Ni-based alloy, and at least one of the entire rotor and the casing of the turbine is welded to the rotor member or the casing member of a plurality of materials. The steam turbine installation characterized by joining and configuring. A steam turbine installation comprising a high pressure turbine, a medium pressure turbine and a low pressure turbine,
At least integrate the high pressure turbine and the medium pressure turbine,
Connecting the integrated cargo and the low pressure turbine on the same axis,
At least one of the rotor and the casing of the turbine into which the steam of 650 ° C. or more is introduced is formed of a Ni-based alloy, and at least one of the entire rotor and the casing of the turbine is welded to the rotor member or the casing member of a plurality of materials. The steam turbine installation characterized by joining and configuring. The method of claim 14,
Forming an ultra-high pressure turbine into which steam of a higher pressure is introduced than steam introduced into the high-pressure turbine, and connecting the ultra-high pressure turbine on the same axis with the integrated cargo integrating the high pressure turbine and the medium pressure turbine, and the low pressure turbine,
At least one of the rotor and the casing of the ultra-high pressure turbine and the high-pressure turbine is formed of a Ni-based alloy, and at least one of the entire turbine rotor and the entire casing is joined by welding a rotor member or a casing member of a plurality of materials by welding. Steam turbine equipment characterized in that the configuration. The method according to claim 14 or 15,
The said integrated cargo further integrated the said low pressure turbine, The steam turbine installation characterized by the above-mentioned.

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