CN210178427U - Long blade cooling system under cylinder cutting operation of steam turbine - Google Patents
Long blade cooling system under cylinder cutting operation of steam turbine Download PDFInfo
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- CN210178427U CN210178427U CN201920848916.0U CN201920848916U CN210178427U CN 210178427 U CN210178427 U CN 210178427U CN 201920848916 U CN201920848916 U CN 201920848916U CN 210178427 U CN210178427 U CN 210178427U
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Abstract
The utility model provides a cut long blade cooling system under jar operation to steam turbine. The utility model discloses nimble steam turbine low pressure cylinder cavity quiet leaf structure and suction pipeline of utilizing will let in the runner as cooling steam through the steam of temperature reduction decompression, carry out specific forced cooling to last several through-flow parts. The low-pressure cylinder of the steam turbine is cut off by the method, the consumption of cooling steam is greatly reduced, and corresponding cooling is only carried out on the through-flow component which is blown, rubbed and heated by the air and is brought by the cutting of the cylinders at the last stage. And this kind of cooling method can widen the application of unit last several grades suction dehumidification structures, as suction dehumidification passageway under the cylinder condition is not cut, as the cooling steam passageway of last several grades through-flow parts under cutting the cylinder condition.
Description
Technical Field
The utility model relates to a cut neotype long blade cooling system under jar operation to steam turbine belongs to steam turbine operation technical field.
Background
In 2016, 7, 4 days, the national energy agency has reached the notification of the thermal power flexibility improvement test point project (the national energy integrated power [2016] 397). Informing requirements, digging the peak regulation potential of the thermal power generating unit, improving the operation flexibility of the thermal power generating unit in China and improving the new energy consumption capability. China plans to implement flexible transformation of 2.2 hundred million kilowatt coal-fired units during thirteen five hours, so that the units have deep peak regulation capability and thermoelectric decoupling capability.
Under the background, the technical transformation is carried out on part of domestic units, and the requirements of the units in the aspects of deep heat supply and peak regulation are met by cutting off low-pressure cylinders. Aiming at the problem of blast friction heating of long blades in the cylinder cutting operation process, the long blades need to be fully cooled by arranging a reasonable cooling steam flow passage and a cooling mode.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the low-pressure cylinder of the steam turbine can be cut off to operate, and the consumption of cooling steam is greatly reduced.
In order to achieve the above object, the technical solution of the present invention is to provide a cooling system for a long blade under the cylinder cutting operation of a steam turbine, which comprises an intermediate pressure cylinder, a low pressure cylinder and a condenser, wherein the intermediate pressure cylinder is communicated with a pipeline of the low pressure cylinder; the penultimate dehumidifying ring and the final-stage dehumidifying ring are connected with the partition plate vacuum suction dehumidifying pipeline on one hand and connected with the cooling steam pipeline on the other hand; along the running direction of the cooling steam, a steam-water separator and a steam extraction flow control valve set are sequentially arranged on the cooling steam pipeline; the steam extraction flow control valve group is connected with the penultimate and final stage dehumidifying rings through cooling steam pipelines; the steam-water separator is connected with the desuperheating water regulating valve through a desuperheating pressure reducer, the desuperheating water regulating valve is connected with a desuperheating water supply pipeline, and the desuperheating pressure reducer is further connected with a steam exhaust outlet pipeline of the intermediate pressure cylinder through a control steam inlet valve II.
Preferably, a flow meter and a thermometer are arranged on the cooling steam pipeline between the steam-water separator and the steam extraction flow control valve group.
Preferably, a block valve, a check valve and a vacuum suction device are arranged on the partition plate vacuum suction dehumidification pipeline.
The utility model discloses nimble steam turbine low pressure cylinder cavity quiet leaf structure and suction pipeline of utilizing will let in the runner as cooling steam through the steam of temperature reduction decompression, carry out specific forced cooling to last several through-flow parts. The low-pressure cylinder of the steam turbine is cut off by the method, the consumption of cooling steam is greatly reduced, and corresponding cooling is only carried out on the through-flow component which is blown, rubbed and heated by the air and is brought by the cutting of the cylinders at the last stage. And this kind of cooling method can widen the application of unit last several grades suction dehumidification structures, as suction dehumidification passageway under the cylinder condition is not cut, as the cooling steam passageway of last several grades through-flow parts under cutting the cylinder condition.
Drawings
Fig. 1 is a schematic view of a long blade cooling system for a steam turbine in cylinder cutting operation according to the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
The utility model provides a pair of cut long blade cooling system under jar operation to steam turbine includes intermediate pressure jar 1, and intermediate pressure jar 1 is connected with low pressure jar 2, and low pressure jar 2 is connected with condenser 3. And a control steam inlet valve I4 is arranged on a communication pipe between the intermediate pressure cylinder 1 and the low pressure cylinder 2. A temperature and pressure reducing device 6 is connected at the steam outlet of the intermediate pressure cylinder 1. A second control steam inlet valve 5 is arranged between the intermediate pressure cylinder 1 and the temperature and pressure reducing device 6. The branch pipe section connected with the temperature and pressure reducing device 6 is provided with a temperature and pressure reducing water regulating valve 7, and the temperature and pressure reducing device 6 is connected with a steam-water separator 8. After the temperature and pressure reducing device 6 is connected with the steam-water separator 8, cooling steam is sent into the hollow stationary blade through the suction dehumidification pipeline and leaks into the flow channel, and the effect of cooling components such as the through-flow long blade at the steam exhaust end of the low-pressure cylinder is achieved. The outlet of the steam-water separator 8 is connected with a flow meter 9, the flow meter 9 is connected with a thermometer 10, the thermometer 10 is connected with a steam extraction flow control valve set 11, and the steam extraction flow control valve set 11 is connected with a penultimate stage and a final stage dehumidification ring 12. The penultimate and final dehumidification rings 12 are connected with a partition vacuum suction dehumidification pipeline, and the partition vacuum suction dehumidification pipeline is provided with a block valve 13, a check valve 14 and a vacuum suction device 15.
The working method of the utility model comprises the following steps:
the method comprises the following steps: and closing the stop valve 13 between the last-stage partition plate and the next-stage partition plate vacuum suction dehumidification pipeline to the vacuum suction device 15, and stopping the vacuum suction system.
Step two: and opening a control steam inlet valve II 5 on the pipe sections from the intermediate pressure cylinder 1 to the temperature and pressure reducing device 6, opening a steam-water separator 8 to a steam extraction flow control valve group 11 on a final-stage partition plate and a penultimate partition plate vacuum suction dehumidification pipeline, and adjusting the flow of cooling steam entering a final-stage partition plate and a penultimate partition plate of the low pressure cylinder 2 according to a flow meter 9 and a thermometer 10 on the steam extraction pipeline.
Step three: and cutting off the steam inlet to the low pressure cylinder through a first control steam inlet valve 4 on a pipe section for communicating the intermediate pressure cylinder 1 with the low pressure cylinder 2.
Compared with the blade cooling technique of the cylinder operation of current steam turbine cutting, the utility model discloses the biggest characteristics lie in utilizing original non-to cut last several grades of suction dehumidification passageway and structures under the jar state, turn into the cooling steam passageway under cutting the jar state, and utilize last several grades of suction dehumidification passageway, the quiet leaf isotructure of cavity, in specific sending a small amount of cooling steam to the quiet leaf of cavity through suction dehumidification passageway, the hydrophobic groove structure on the quiet leaf surface of rethread cavity can send cooling steam to and carry out forced cooling in the last several grades of through-flow parts. Because the mode is used for specifically cooling the last stage through-flow component with obvious blast heating problem after the cutting cylinder, the corresponding flow of cooling steam introduced into the whole low-pressure cylinder can be reduced.
Claims (3)
1. A long blade cooling system aiming at the cylinder cutting operation of a steam turbine comprises an intermediate pressure cylinder (1), a low pressure cylinder (2) and a condenser (3), wherein the intermediate pressure cylinder (1) is communicated with the low pressure cylinder (2) through a pipeline, the low pressure cylinder (2) is communicated with the condenser (3) in a management way, and a secondary-final-stage dehumidification ring and a final-stage dehumidification ring (12) are arranged at the low pressure cylinder (2), and the long blade cooling system is characterized in that a first control steam inlet valve (4) is arranged on the pipeline between the intermediate pressure cylinder (1) and the low pressure cylinder (2); the penultimate and final dehumidification rings (12) are connected with a partition plate vacuum suction dehumidification pipeline on one hand and a cooling steam pipeline on the other hand; along the running direction of the cooling steam, a steam-water separator (8) and a steam extraction flow control valve group (11) are sequentially arranged on the cooling steam pipeline; the steam extraction flow control valve group (11) is connected with the penultimate stage and the final stage dehumidification ring (12) through cooling steam pipelines; the steam-water separator (8) is connected with the desuperheating water regulating valve (7) through the desuperheating pressure reducer (6), the desuperheating water regulating valve (7) is connected with a desuperheating water supply pipeline, and the desuperheating pressure reducer (6) is also connected with a steam exhaust outlet pipeline of the intermediate pressure cylinder (1) through the control steam inlet valve II (5).
2. The system for cooling the long blades in the cylinder cutting operation of the steam turbine according to claim 1, wherein a flow meter (9) and a temperature meter (10) are arranged on the cooling steam pipeline between the steam-water separator (8) and the steam extraction flow control valve group (11).
3. The cooling system for the long blades under the condition of cutting the cylinder of the steam turbine as claimed in claim 1, wherein a block valve (13), a check valve (14) and a vacuum suction device (15) are arranged on the partition vacuum suction dehumidification pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920848916.0U CN210178427U (en) | 2019-06-05 | 2019-06-05 | Long blade cooling system under cylinder cutting operation of steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920848916.0U CN210178427U (en) | 2019-06-05 | 2019-06-05 | Long blade cooling system under cylinder cutting operation of steam turbine |
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| CN210178427U true CN210178427U (en) | 2020-03-24 |
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| CN201920848916.0U Active CN210178427U (en) | 2019-06-05 | 2019-06-05 | Long blade cooling system under cylinder cutting operation of steam turbine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439635A (en) * | 2019-06-05 | 2019-11-12 | 上海发电设备成套设计研究院有限责任公司 | For the linear leaf cooling system and method under the operation of steamer machine-cut cylinder |
| CN114687815A (en) * | 2022-04-24 | 2022-07-01 | 中国船舶重工集团公司第七0三研究所 | Simple low-pressure cylinder cooling steam system of double-low-pressure-cylinder zero-output steam turbine set |
-
2019
- 2019-06-05 CN CN201920848916.0U patent/CN210178427U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439635A (en) * | 2019-06-05 | 2019-11-12 | 上海发电设备成套设计研究院有限责任公司 | For the linear leaf cooling system and method under the operation of steamer machine-cut cylinder |
| CN114687815A (en) * | 2022-04-24 | 2022-07-01 | 中国船舶重工集团公司第七0三研究所 | Simple low-pressure cylinder cooling steam system of double-low-pressure-cylinder zero-output steam turbine set |
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Effective date of registration: 20200521 Address after: 200240 Shanghai city Minhang District Jianchuan Road No. 1115 Co-patentee after: KAIFENG POWER GENERATION BRANCH OF HENAN ELECTRIC POWER CO., LTD., STATE POWER INVESTMENT Corp. Patentee after: SHANGHAI POWER EQUIPMENT RESEARCH INSTITUTE Co.,Ltd. Co-patentee after: State Power Investment Group Henan Electric Power Co., Ltd Address before: No. 1115 Jianchuan Road, Minhang District, Shanghai 201100 Co-patentee before: KAIFENG POWER GENERATION BRANCH OF HENAN ELECTRIC POWER CO., LTD., STATE POWER INVESTMENT Corp. Patentee before: SHANGHAI POWER EQUIPMENT RESEARCH INSTITUTE Co.,Ltd. |