CN210152739U - Steam exhaust system of steam turbine with high-position arranged water feeding pump - Google Patents
Steam exhaust system of steam turbine with high-position arranged water feeding pump Download PDFInfo
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- CN210152739U CN210152739U CN201920726999.6U CN201920726999U CN210152739U CN 210152739 U CN210152739 U CN 210152739U CN 201920726999 U CN201920726999 U CN 201920726999U CN 210152739 U CN210152739 U CN 210152739U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 230000017525 heat dissipation Effects 0.000 claims description 78
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000026676 system process Effects 0.000 abstract description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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Abstract
The utility model discloses a high-position arranged steam exhaust system of a water feeding pump turbine, which comprises a water feeding pump turbine, a main turbine, a first steam exhaust pipeline, a second steam exhaust pipeline and an air cooling condenser; the air-cooling condenser is arranged on an air-cooling condenser platform with the horizontal height of 40-50 m; the main turbine is arranged on a main turbine running layer with the horizontal height of 60-70 m, and a first steam outlet of the main turbine is communicated with the air-cooled condenser through a first steam exhaust pipeline; the water feeding pump turbine is arranged on a water feeding pump turbine running layer with the horizontal height of 40m-50m, the water feeding pump turbine comprises a second steam inlet and a second steam outlet which can receive steam, a second steam exhaust pipeline extends horizontally in a linear mode, and the second steam outlet is communicated with the air cooling condenser through the second steam exhaust pipeline. The utility model discloses system process can be simplified, the exhaust steam line length and the resistance of feed pump steam turbine are reduced.
Description
Technical Field
The utility model relates to a thermal power technology field specifically relates to a water-feeding pump steam turbine steam exhaust system is arranged to high position.
Background
At present, in a domestic direct air-cooled water-feeding pump steam turbine steam exhaust system, the elevation of a main steam turbine running layer is mostly 13.7-15.5 m, a steam turbine is arranged at the lower part of a low-pressure cylinder, and the steam exhaust device is flexibly connected with the low-pressure cylinder. The steam exhaust pipeline is connected from the steam exhaust device to a steam distribution pipeline of an air-cooled condenser with the height of more than 40 meters from the ground. The quantity of the pipeline, the pipe fitting, the compensator and the support hanger is large, and the resistance of the steam exhaust device and the steam exhaust pipeline is large.
According to the industrial standard, the water consumption index of the air-cooled thermal power generating unit in the northern water-deficient area is controlled to be below 0.12 cubic meter per second million kilowatts. If the water supply pump turbine adopts wet and cold type steam exhaust, the water consumption index is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the problem that prior art exists, provide a water-feeding pump steam turbine exhaust system is arranged to high position, can simplify system process, reduce the exhaust steam piping length and the resistance of water-feeding pump steam turbine to can also reduce the supplementary auxiliary assembly of water-feeding pump steam turbine, reduce operation and maintenance work volume.
In order to achieve the purpose, the utility model provides a high-order arranged steam exhaust system of a water feeding pump turbine, which comprises a water feeding pump turbine, a main turbine, a first steam exhaust pipeline, a second steam exhaust pipeline and an air cooling condenser; the air-cooling condenser is arranged on an air-cooling condenser platform with the horizontal height of 40-50 m; the main turbine is arranged on a main turbine running layer with the horizontal height of 60-70 m, the main turbine comprises a first steam inlet and a first steam outlet which can receive steam, and the first steam outlet is communicated with the air-cooled condenser through the first steam outlet pipeline; the water supply pump steam turbine is arranged on a water supply pump steam turbine running layer with the horizontal height of 40m-50m, the water supply pump steam turbine comprises a second steam inlet and a second steam outlet which can receive steam, the second steam exhaust pipeline extends horizontally in a linear mode, and the second steam outlet is communicated with the air cooling condenser through the second steam exhaust pipeline.
Preferably, the main turbine operation layer and the feed pump turbine operation layer are arranged in a turbine room, the main turbine operation layer is located on the upper side of the feed pump turbine operation layer, and the air-cooled condenser platform is horizontally spaced from the turbine room.
Preferably, the main turbine includes a low pressure cylinder, and the first exhaust port and the first intake port are provided on the low pressure cylinder.
Preferably, the high-order water-feeding pump steam turbine exhaust system of arranging includes the third exhaust pipe way, first exhaust pipe way and the second exhaust pipe way respectively with the third exhaust pipe way intercommunication, the other end of third exhaust pipe way with the air cooling condenser is connected.
Preferably, the high-order water-feeding pump turbine steam exhaust system of arranging is including setting up the main turbine with primary heat dissipation platform between the air cooling condenser, be provided with a plurality of heat dissipation branch pipes on the primary heat dissipation platform, first exhaust pipeline is through a plurality of heat dissipation branch pipe connect in the air cooling condenser.
Preferably, the primary heat dissipation platform comprises a lower fan array and an upper heat dissipation unit array, the heat dissipation branch pipes are supported on the heat dissipation unit arrays, one side of the primary heat dissipation platform facing the vertical section is provided with a windproof piece extending towards the vertical section, and the windproof piece can at least partially block airflow in the vertical direction between the primary heat dissipation platform and the vertical section.
Preferably, the wind guard includes a wind guard plate including an inclined portion having a first end connected to the primary heat dissipation platform and a second end inclined downward with respect to the first end of the inclined portion, and a vertical portion connected to the second end of the inclined portion and extending downward.
Preferably, the wind guard includes a wind guard plate including a slanted portion having a first end connected to the primary heat dissipation platform and a second end inclined downward with respect to the first end of the slanted portion, and a horizontal portion connected to the second end of the slanted portion and extending toward the vertical section.
Preferably, the inclined portion is connected to a joint position of the fan array and the heat dissipation unit array.
Preferably, a vertical air duct is arranged in the heat dissipation unit array.
Through the technical scheme, the main turbine arranged at a high position is arranged on the main turbine running layer with the horizontal height of 60m-70m, the water supply pump turbine arranged at the same high position is arranged on the water supply pump turbine running layer with the horizontal height of 40m-50m, and the air cooling condenser is arranged on the air cooling condenser platform with the horizontal height of 40m-50m, so that a first exhaust pipeline connected with the main turbine and the air cooling condenser is not required to be designed into a U-shaped structure, and a second exhaust pipeline connected between the water supply pump turbine and the air cooling condenser is not required to be designed into a U-shaped structure but is in a linear horizontal extension mode, so that the resistance of the first exhaust pipeline and the second exhaust pipeline to steam is reduced. And the water supply pump turbine and the main turbine share the same air-cooled condenser, so that the process flow of the system is simplified, and the water supply pump turbine is directly connected with the air-cooled condenser through a second steam exhaust pipeline, so that a steam exhaust device is omitted, auxiliary equipment of the water supply pump turbine condenser is omitted, and the workload of operation and maintenance is reduced.
Drawings
FIG. 1 is a schematic structural view of a preferred embodiment of a steam exhaust system of a high-level layout feed pump steam turbine of the present invention;
fig. 2 is a schematic structural view of the first steam exhaust pipeline of the present invention matching with the primary heat dissipation platform;
FIG. 3 is an enlarged view of a portion of the windbreak according to an embodiment of the present invention;
fig. 4 is an enlarged view of a portion of a wind guard according to another embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
As shown in fig. 1 to 4, the high-position-arrangement water-feeding pump turbine steam exhaust system of the present invention includes a water-feeding pump turbine 10, a main turbine, a first steam exhaust pipeline 30, a second steam exhaust pipeline 40 and an air-cooled condenser 50; the air-cooling condenser 50 is arranged on an air-cooling condenser platform with the horizontal height of 40m-50 m; the main turbine is arranged on a main turbine running layer with the horizontal height of 60-70 m, the main turbine comprises a first steam inlet and a first steam outlet which can receive steam, and the first steam outlet is communicated with the air-cooling condenser 50 through a first steam exhaust pipeline 30; the feed pump turbine 10 is arranged on a feed pump turbine running layer with the horizontal height of 40m-50m, the feed pump turbine 10 comprises a second steam inlet and a second steam outlet which can receive steam, the second steam exhaust pipeline 40 extends horizontally in a linear mode, and the second steam outlet is communicated with the air-cooled condenser 50 through the second steam exhaust pipeline 40.
In the present invention, since the main turbine disposed at the high position is disposed on the main turbine running layer with the horizontal height of 60m to 70m, the water supply pump turbine 10 disposed at the same high position is disposed on the water supply pump turbine running layer with the horizontal height of 40m to 50m, and the air cooling condenser 50 is disposed on the air cooling condenser platform with the horizontal height of 40m to 50m, the first exhaust pipe 30 connected between the main turbine and the air cooling condenser 50 does not need to be designed into a U-shaped structure, and the second exhaust pipe 40 connected between the water supply pump turbine 10 and the air cooling condenser 50 does not need to be designed into a U-shaped structure, but adopts a linear horizontal extension mode, thereby reducing the resistance of the first exhaust pipe 30 and the second exhaust pipe 40 to the steam. In addition, the water supply pump turbine 10 and the main turbine share the same air-cooled condenser 50, so that the process flow of the system is simplified, and the water supply pump turbine 10 is directly connected with the air-cooled condenser 50 through the second steam exhaust pipeline 40, so that a steam exhaust device is omitted, auxiliary equipment of the water supply pump turbine condenser is omitted, and the workload of operation and maintenance is reduced.
It should be understood that the feedwater pump turbine 10 of the present invention utilizes the main turbine extraction as the working fluid during normal operation, which is not different from the prior art in this field.
The main steam turbine operation layer and the water feeding pump steam turbine operation layer are arranged in the steam turbine room, certainly without limitation, the specific height of the main steam turbine operation layer and the water feeding pump steam turbine operation layer, in some embodiments, the main steam turbine operation layer is arranged below the water feeding pump steam turbine operation layer, and the utility model discloses an in the preferred embodiment, the main steam turbine operation layer is located water feeding pump steam turbine operation layer upside, air cooling condenser platform and steam turbine room horizontal interval. That is, the feed-water pump turbine 10 and the air-cooled condenser 50 are at substantially the same level, and the main turbine is at a level slightly higher than the feed-water pump turbine 10. In a preferred embodiment of the present invention, the feed pump turbine 10 and the air-cooled condenser 50 are both disposed at a height of 45m, and the main turbine is disposed at a height of 65 m.
Specifically, the main turbine includes a low pressure cylinder 20, and a first exhaust port and a first intake port are provided on the low pressure cylinder 20. The steam enters the low pressure cylinder 20 through the first steam inlet, and the low pressure steam after the low pressure cylinder 20 works and works enters the first steam exhaust pipeline 30 through the first steam outlet.
Sometimes, in order to reduce the installation space as much as possible in view of the requirement of the installation space, it is preferable that the exhaust system of the high-position feed water pump turbine includes a third exhaust pipe, the first exhaust pipe 30 and the second exhaust pipe 40 are respectively communicated with the third exhaust pipe, and the other end of the third exhaust pipe is connected with the air-cooled condenser 50. Since the third exhaust steam duct is a separate pipe, it has a small volume, so that it can reduce installation space.
In order to improve the condensation efficiency of the steam, preferably, the high-position-arrangement feed pump turbine exhaust system includes a primary heat dissipation platform 60 disposed between the main turbine and the air-cooled condenser 50, the primary heat dissipation platform 60 is provided with a plurality of heat dissipation branch pipes 70, and the first exhaust pipeline 30 is connected to the air-cooled condenser 50 through the plurality of heat dissipation branch pipes 70. The steam in the first exhaust pipeline 30 is cooled by the primary heat dissipation platform 60, and then enters the air-cooled condenser 50 for condensation, so that the condensation efficiency is improved. In addition, in order to further improve the cooling efficiency of the primary heat dissipation platform 60, the plurality of heat dissipation branch pipes 70 are disposed on the primary heat dissipation platform 60 in a tiled manner, and the steam in the first exhaust duct 30 enters the plurality of heat dissipation branch pipes 70 through shunting, so that the heat exchange area between the steam and the primary heat dissipation platform 60 is increased, and the cooling efficiency of the primary heat dissipation platform 60 is improved.
The steam is exhausted through the first exhaust port of the low-pressure cylinder 20 after acting in the low-pressure cylinder 20 of the main turbine, that is, through the first exhaust pipe 30, the horizontal section 302 of the first exhaust pipe 30 is connected to and shunted by the plurality of radiating branch pipes 70, and the plurality of radiating branch pipes 70 are supported on the radiating unit array 602 of the primary radiating platform 60, so that the plurality of radiating branch pipes 70 and the steam therein are cooled by the primary radiating platform 60. The heat dissipation unit array 602 includes a plurality of heat dissipation units with good thermal conductivity, and the heat dissipation units have a large heat dissipation area, and the heat of the first exhaust duct 30 can be transferred to the heat dissipation units to expand the heat dissipation area and the heat dissipation efficiency. Specifically, the fan array 601 is disposed on the lower side of the heat dissipation unit array 602, that is, a heat dissipation airflow from the bottom to the top is formed by the fan array 601, that is, the airflow on the lower side of the fan array 601 is conveyed to the heat dissipation unit array 602 to perform air cooling heat dissipation on the heat dissipation unit array 602.
It should be noted that the first steam inlet of low pressure cylinder 20 is located at approximately the top of low pressure cylinder 20, and the first steam outlet is located at the bottom of low pressure cylinder 20, so that the height of primary heat dissipation platform 60 is less than the height of the main turbine operating floor. The primary heat dissipation platform 60 and the main turbine running layer keep a horizontal interval, when the wind direction is approximately from the primary heat dissipation platform 60 to the main turbine running layer (a certain angle can be formed with the direction), the airflow above the primary heat dissipation platform 60 is blocked and flows downwards after reaching the main turbine running layer, so that the high-temperature airflow above the primary heat dissipation platform 60 flows to the vicinity of the fan array 601, namely hot wind flows back, and the heat dissipation capacity of the primary heat dissipation platform 60 is influenced; when the wind direction is approximately from the main turbine operation layer to the primary heat dissipation platform 60 (a certain angle may be formed with the direction), due to the shielding of the boiler plant and the main turbine operation layer, the heat dissipation of the partial heat dissipation unit array close to the main turbine operation layer side is not favorable, and hot wind backflow occurs, which affects the heat dissipation effect.
Therefore, the utility model discloses set up in one side of elementary heat dissipation platform 60 orientation main steam turbine operation layer and prevent wind the piece, stop the air current at least partially through preventing wind and flow from the top down between elementary heat dissipation platform 60 and main steam turbine operation layer, avoid the air current of elementary heat dissipation platform 60 upside to flow its downside, avoid hot-blast backward flow phenomenon to appear, guarantee that elementary heat dissipation platform 60 has sufficient radiating efficiency.
As for the windbreak, various solid structures may be included as long as they can block the flow of the air stream.
According to a specific embodiment of the present invention, the windproof component includes the windproof plate 90, the windproof plate 90 includes an inclined portion 901 and a vertical portion 902, the first end of the inclined portion 901 is connected to the primary heat dissipation platform 60, the second end of the inclined portion 901 is inclined downward with respect to the first end of the inclined portion 901, and the vertical portion 902 is connected to the second end of the inclined portion 901 and extends downward. The wind guard includes a plate-shaped structure of the wind guard plate 90. The windshield 90 includes a downward inclined portion 901, and the inclined portion 901 is connected with a downward extending vertical portion 902, the inclined portion 901 is inclined in a manner that can weaken the force acting on the air flow vertically downward, and the vertical portion 902 can further protect the primary heat dissipation platform 60 (particularly the fan array 601) and block the air flow with higher temperature from flowing toward the primary heat dissipation platform 60.
According to another embodiment of the present invention, the wind guard comprises a wind guard 90, the wind guard 90 comprises an inclined portion 901 and a horizontal portion 903, a first end of the inclined portion 901 is connected to the primary heat dissipation platform 60, a second end of the inclined portion 901 is inclined downward with respect to the first end of the inclined portion 901, and the horizontal portion 903 is connected to the second end of the inclined portion 901 and extends towards the main turbine operational level. The wind guard includes a plate-shaped structure of the wind guard plate 90. The windbreak panel 90 includes a downwardly inclined portion 901, and the inclined portion 901 is connected with a horizontal portion 903 extending toward the main turbine running layer, the inclined portion 901 is inclined in such a manner that the force acting between the wind break panel 90 and the vertical downward airflow can be weakened, and the horizontal portion 903 can increase the width of the windbreak panel 90 occupied between the primary heat dissipation platform 60 and the main turbine running layer, and reduce the airflow flowing from top to bottom, so that less of the higher temperature airflow reaches the fan array 601.
Further, the inclined portion 901 is connected to a joint position of the fan array 601 and the heat radiating unit array 602. The inclined portion 901 is connected to a joint position of the fan array 601 and the heat dissipating unit array 602, that is, a substantially planar interface between the fan array 601 and the heat dissipating unit array 602, that is, the fan array 601 is protected by the wind guard plate 90, so that a high-temperature air flow on the primary heat dissipating platform 60 is prevented from returning to the fan array 601, an air flow conveyed upward by the fan array 601 is guaranteed to have a low temperature, and the heat dissipating capability of the primary heat dissipating platform 60 is guaranteed.
Further, a vertical air duct is disposed in the heat dissipation unit array 602. The fan array 601 is disposed at the lower side of the heat dissipation unit array 602, and can provide heat dissipation airflow from bottom to top to perform air cooling heat dissipation on the heat dissipation unit array 602, and therefore, a vertical air duct may be disposed in the heat dissipation unit array 602 to allow the heat dissipation airflow to smoothly pass through the heat dissipation unit array 602. The heat dissipating unit array 602 may include a plurality of sets of heat dissipating fins (i.e., heat dissipating units) that are in sufficient contact with the first exhaust duct 30 to receive heat of the first exhaust duct 30 by means of heat conduction, and the heat dissipating branch pipes 70 may be indirectly heat-dissipated through an air cooling process of the heat dissipating unit array 602.
The utility model discloses a high-order water-feeding pump steam turbine exhaust system of arranging is through setting up water-feeding pump steam turbine 10 at 40m-50m height to adopt the mode that the second exhaust steam line 40 that is the linear type level extension is direct to be connected with air cooling condenser 50, simplified system process flow, reduced the exhaust steam line length and the resistance of water-feeding pump steam turbine, and still reduced the supplementary auxiliary assembly of water-feeding pump steam turbine.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. The high-position-arrangement water-feeding pump turbine steam exhaust system is characterized by comprising a water-feeding pump turbine (10), a main turbine, a first steam exhaust pipeline (30), a second steam exhaust pipeline (40) and an air-cooled condenser (50);
the air-cooling condenser (50) is arranged on an air-cooling condenser platform with the horizontal height of 40-50 m;
the main turbine is arranged on a main turbine running layer with the horizontal height of 60-70 m, the main turbine comprises a first steam inlet and a first steam outlet which can receive steam, and the first steam outlet is communicated with the air-cooled condenser (50) through the first steam exhaust pipeline (30);
the water feeding pump steam turbine (10) is arranged on a water feeding pump steam turbine running layer with the horizontal height of 40m-50m, the water feeding pump steam turbine (10) comprises a second steam inlet and a second steam outlet which can receive steam, the second steam outlet pipeline (40) extends horizontally in a linear mode, and the second steam outlet and the air cooling condenser (50) are communicated with each other through the second steam outlet pipeline (40).
2. The high-mounted feed pump turbine steam discharge system according to claim 1, wherein the main turbine operating floor and the feed pump turbine operating floor are provided in a turbine room, the main turbine operating floor is located above the feed pump turbine operating floor, and the air-cooled condenser platform is horizontally spaced from the turbine room.
3. The high-layout feed pump turbine exhaust system according to claim 2, wherein the main turbine includes a low pressure cylinder (20), and the first exhaust port and the first inlet port are provided on the low pressure cylinder (20).
4. The high-order-arrangement feed pump turbine exhaust system according to claim 2, comprising a third exhaust pipeline, wherein the first exhaust pipeline (30) and the second exhaust pipeline (40) are respectively communicated with the third exhaust pipeline, and the other end of the third exhaust pipeline is connected with the air-cooled condenser (50).
5. The high-order layout feed pump turbine exhaust system according to claim 2, comprising a primary heat dissipation platform (60) disposed between the main turbine and the air-cooled condenser (50), wherein a plurality of heat dissipation branch pipes (70) are disposed on the primary heat dissipation platform (60), and the first exhaust pipeline (30) is connected to the air-cooled condenser (50) through a plurality of heat dissipation branch pipes (70).
6. An elevated arrangement feed pump steam turbine exhaust system according to claim 5, characterized in that the primary heat dissipation platform (60) comprises a lower fan array (601) and an upper heat dissipation unit array (602), the heat dissipation branch pipes (70) are supported on the heat dissipation unit array (602), and one side of the primary heat dissipation platform (60) facing the vertical section (301) of the first steam exhaust duct (30) is provided with a wind shield extending towards the vertical section (301), the wind shield being capable of at least partially blocking the air flow in the vertical direction between the primary heat dissipation platform (60) and the vertical section (301).
7. The high-mounted feedwater pump turbine exhaust system of claim 6 wherein the windbreak comprises a windbreak plate (90), the windbreak plate (90) comprising an inclined portion (901) and a vertical portion (902), a first end of the inclined portion (901) being connected to the primary heat rejection platform (60), a second end of the inclined portion (901) being inclined downwardly relative to the first end of the inclined portion (901), the vertical portion (902) being connected to the second end of the inclined portion (901) and extending downwardly.
8. The high-position arrangement feed water pump turbine steam exhaust system of claim 6, wherein the windbreak comprises a windbreak plate (90), the windbreak plate (90) comprising an inclined portion (901) and a horizontal portion (903), a first end of the inclined portion (901) being connected to the primary heat rejection platform (60), a second end of the inclined portion (901) being inclined downwardly relative to the first end of the inclined portion (901), the horizontal portion (903) being connected to the second end of the inclined portion (901) and extending towards the vertical section (301).
9. The high-position arrangement feed water pump turbine exhaust system according to claim 7 or 8, wherein the inclined portion (901) is connected to a joint position of the fan array (601) and the heat dissipation unit array (602).
10. The high-position arrangement feed water pump steam turbine exhaust system according to claim 6, wherein a vertical air duct is arranged in the heat dissipation unit array (602).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920726999.6U CN210152739U (en) | 2019-05-20 | 2019-05-20 | Steam exhaust system of steam turbine with high-position arranged water feeding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920726999.6U CN210152739U (en) | 2019-05-20 | 2019-05-20 | Steam exhaust system of steam turbine with high-position arranged water feeding pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210152739U true CN210152739U (en) | 2020-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920726999.6U Active CN210152739U (en) | 2019-05-20 | 2019-05-20 | Steam exhaust system of steam turbine with high-position arranged water feeding pump |
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| Country | Link |
|---|---|
| CN (1) | CN210152739U (en) |
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- 2019-05-20 CN CN201920726999.6U patent/CN210152739U/en active Active
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