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Ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine

A low-pressure cylinder and steam turbine technology, applied in steam engine installations, steam applications, mechanical equipment, etc., can solve problems such as dynamic stress risk, blast risk, water erosion risk, etc., to ensure cooling effect, avoid excessive water spray, and reduce blades The effect of water erosion

Pending Publication Date: 2019-09-20
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of dynamic stress risk, blast risk and water erosion risk in the zero-output flexible peak-shaving transformation of the existing 200MW steam turbine; now provides an ultra-high pressure 200MW low-pressure cylinder zero-output flexible transformation steam turbine

Method used

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  • Ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine
  • Ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine
  • Ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine

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specific Embodiment approach 1

[0024] Specific implementation mode one: combine figure 1 Describe this embodiment. In this embodiment, the ultra-high pressure 200MW low-pressure cylinder zero-efficiency flexible retrofit steam turbine includes a high-pressure cylinder, a medium-pressure cylinder 2, a low-pressure cylinder 3, a low-pressure cooling steam system 5, and a heating and extraction system 6 and the low-pressure cylinder water spray system 7, a medium-low pressure connecting pipe 1 is set between the medium-pressure cylinder 2 and the low-pressure cylinder 3, and the medium-low pressure connecting pipe 1 is provided with a heating extraction interface and a cooling steam outlet of the low-pressure cylinder along the steam outlet direction. The steam port, the butterfly valve 4 and the cooling steam inlet of the low-pressure cylinder, the steam inlet of the low-pressure cooling steam system 5 are connected to the cooling steam outlet of the low-pressure cylinder, and the steam outlet of the low-press...

specific Embodiment approach 2

[0028] Specific implementation mode two: combination figure 2 Describe this embodiment. In this embodiment, the low-pressure cooling steam system 5 includes a steam seal pipe 5-1, an electric gate valve 5-8, two drain pipes 5-2, two second regulating valves 5-3, The first electric flow regulating valve 5-4, the temperature regulating station 5-5, the thermocouple 5-6 and the pressure gauge 5-7;

[0029] The steam inlet end of the steam seal pipe 5-1 is connected to the cooling steam outlet of the low-pressure cylinder, and the steam outlet end of the steam seal pipe 5-1 is connected to the cooling steam inlet of the low-pressure cylinder. The flow direction of the steam is provided with an electric gate valve 5-8, a water outlet of the first drain pipe, a first electric flow regulating valve 5-4, a temperature regulating station 5-5, a water outlet of the second drain pipe, a thermocouple 5-6 and Pressure gauge 5-7, one of the drain pipes 5-2 is connected to the outlet of th...

specific Embodiment approach 3

[0033] Specific implementation mode three: combination figure 1 Describe this embodiment. In this embodiment, the heating extraction system 6 includes an extraction pipeline 6-1, a safety valve 6-2, a check valve 6-3, a regulating valve 6-4 and a shut-off valve 6-5. , the steam inlet end of the steam extraction pipeline 6-1 is connected to the heating extraction steam interface, and a safety valve 6-2, a check valve 6-3, and a regulating valve are sequentially arranged on the steam extraction pipeline 6-1 along the steam outlet direction 6-4 and shut-off valve 6-5.

[0034] Other compositions and connection methods are the same as those in Embodiment 1.

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Abstract

The invention discloses an ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine, and belongs to the technical field of steam turbines. The ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine aims to solve the problems of dynamic stress risk, blast risk and water erosion risk caused by low-pressure cylinder zero-output flexible peak adjustment transformation. The steam turbine comprises a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a low-pressure cooling steam system, a heating and steam extraction system and a low-pressure cylinder water spraying system, wherein a medium-and-low-pressure communicating pipe is arranged between the medium-pressure cylinder and the low-pressure cylinder, a heating and steam extraction connecting port, a low-pressure cylinder cooling steam outlet, a butterfly valve and a low-pressure cylinder cooling steam inlet are sequentially arranged on the medium-and-low-pressure communicating pipe in the steam outlet direction, a steam inlet of the low-pressure cooling steam system is connected to the low-pressure cylinder cooling steam outlet, a steam outlet of the low-pressure cooling steam system is connected to the low-pressure cylinder cooling steam inlet, a steam inlet of the heating and steam extraction system is connected to the heating and steam extraction connecting port, and the low-pressure cylinder water spraying system is used for carrying out water spraying and temperature reduction on a last-stage movable blade of the low-pressure cylinder. The ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine is mainly used for the field of steam turbine transformation.

Description

technical field [0001] The invention belongs to the technical field of steam turbines, and in particular relates to a steam turbine for zero-effort flexible transformation of an ultra-high pressure 200MW low-pressure cylinder. Background technique [0002] The existing 200MW class heating transformation unit, such as high back pressure transformation, optical axis backpressure machine transformation, etc., still follows the principle of determining power by heat, and heat supply and power supply are related. While meeting the heat supply demand of the power plant, it cannot To meet the needs of power plants for peak regulation, the market urgently needs new models for flexible peak regulation. [0003] The zero-efficiency operation of the low-pressure cylinder is a new operating mode proposed in recent years by the flexible transformation of thermal power units. The low-pressure cylinder has zero output, that is, under the heating condition of the steam turbine unit, the med...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/12F01D5/14F01K17/02
CPCF01D25/12F01D5/147F01K17/02
Inventor 柴发军胡金龙杨国栋王明君闫佳林党丽丽丁莹王岳刘扬裴崇鸿
Owner HARBIN TURBINE
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