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CN106988803B - A kind of low pressure (LP) cylinder linear leaf cooling system and method based on extraction opening - Google Patents

A kind of low pressure (LP) cylinder linear leaf cooling system and method based on extraction opening Download PDF

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Publication number
CN106988803B
CN106988803B CN201710385711.9A CN201710385711A CN106988803B CN 106988803 B CN106988803 B CN 106988803B CN 201710385711 A CN201710385711 A CN 201710385711A CN 106988803 B CN106988803 B CN 106988803B
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China
Prior art keywords
steam
low
pressure cylinder
cooling
cylinder
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CN201710385711.9A
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Chinese (zh)
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CN106988803A (en
Inventor
叶向东
赵贺
罗发青
陈锋
宋文希
杨荣祖
白月林
鲍军
杨建亭
郝文艺
杨晔
周强
杨文革
刘富栋
周岩
张宏宇
胡振绪
乔建军
张喜来
赵志良
祁海旺
林茂
焦建刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NORTHERN UNITED POWER CO Ltd
China Huaneng Group Co Ltd
Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
Linhe Thermal Power Plant of Northern United Power Co Ltd
Original Assignee
NORTHERN UNITED POWER CO Ltd
China Huaneng Group Co Ltd
Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
Linhe Thermal Power Plant of Northern United Power Co Ltd
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Application filed by NORTHERN UNITED POWER CO Ltd, China Huaneng Group Co Ltd, Xian Thermal Power Research Institute Co Ltd, Xian Xire Energy Saving Technology Co Ltd, Linhe Thermal Power Plant of Northern United Power Co Ltd filed Critical NORTHERN UNITED POWER CO Ltd
Priority to CN201710385711.9A priority Critical patent/CN106988803B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/12—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)

Abstract

本发明公开了一种基于抽汽口的低压缸长叶片冷却系统及方法，包括中压缸，中压缸连接低压缸，低压缸的排汽连接凝汽器，低压缸连接抽汽管道，抽汽管道上设置有抽汽控制阀组，抽汽控制阀组与低压缸间接入冷却蒸汽系统。在汽轮机切除低压缸进汽运行时，通过汽轮机低压缸抽汽口将冷却蒸汽引入至低压缸通流部分，利用低压、低温的蒸汽冷却低压缸长叶片，从而使冷却蒸汽能够更有效的冷却低压长叶片，减少冷却低压缸长叶片的蒸汽消耗，提高汽轮机的供热抽汽能力。

The invention discloses a low-pressure cylinder long-blade cooling system and method based on a steam extraction port. The steam pipeline is provided with a steam extraction control valve group, and the steam extraction control valve group is connected to the cooling steam system between the low pressure cylinder. When the steam turbine cuts off the steam intake of the low-pressure cylinder, the cooling steam is introduced into the flow part of the low-pressure cylinder through the steam extraction port of the low-pressure cylinder of the steam turbine, and the low-pressure and low-temperature steam is used to cool the long blades of the low-pressure cylinder, so that the cooling steam can cool the low-pressure cylinder more effectively. Long blades reduce the steam consumption for cooling the long blades of the low-pressure cylinder, and improve the heat supply and extraction capacity of the steam turbine.

Description

A kind of low pressure (LP) cylinder linear leaf cooling system and method based on extraction opening
Technical field
The invention belongs to turbine system design fields, and in particular to a kind of low pressure (LP) cylinder linear leaf based on extraction opening is cooling System and method.
Background technique
Currently, to avoid turbine low pressure cylinder linear leaf from generating the crisis of air blast, flutter etc. under the conditions of little volume flow The problem of Turbine Safety is run, when often requiring that steam turbine operation, turbine discharge flow is (general not less than certain limit value About 10%~30% or so of declared working condition main steam flow).For thermal power plant unit, by the shadow of low pressure (LP) cylinder exhaust steam flow limit value It rings, steam turbine heat supply pump gas ablity is subject to certain restrictions.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of low pressure (LP) cylinder linear leaf cooling system based on extraction opening And method, to enable the more effectively cooling low pressure linear leaf of cooling steam, the steam for reducing cooling low pressure (LP) cylinder linear leaf disappears Consumption, improves the heat supply pump gas ablity of steam turbine.
In order to achieve the above object, a kind of low pressure (LP) cylinder linear leaf cooling system based on extraction opening, including intermediate pressure cylinder, middle pressure Cylinder connects low pressure (LP) cylinder, and the steam discharge of low pressure (LP) cylinder connects condenser, and low pressure (LP) cylinder is provided with extraction opening, steam extraction control is provided on extraction line Valve group processed, cooling steam system access low pressure (LP) cylinder flow passage component before extraction control valve group.
Medium pressure cylinder connects low pressure (LP) cylinder by mesolow communicating pipe, and mesolow is provided with valve on communicating pipe.
It is provided with cooling control valve group accordingly in the cooling steam system.
Flowmeter is provided in the cooling steam system.
The cooling steam system accesses on the jet chimney between extraction control valve group and low pressure (LP) cylinder extraction opening.
A kind of working method of the low pressure (LP) cylinder linear leaf cooling system based on extraction opening, comprising the following steps:
The steam discharge of step 1, intermediate pressure cylinder is passed through in low pressure (LP) cylinder；
Step 2, cooling steam system are led to from the jet chimney between extraction control valve group and extraction opening into low pressure (LP) cylinder Enter the cooling steam for cooling down low pressure (LP) cylinder linear leaf.
In the step 2, by valve on mesolow communicating pipe adjust low pressure (LP) cylinder into vapour.
In the step 2, the aperture of cooling control valve group is controlled by the reading on observation flowmeter, changes cooling steam The steam flow of vapour system.
Compared with prior art, the present invention is by passing through steam turbine low-pressure when steam turbine cuts off low pressure (LP) cylinder into automotive row Cooling steam is introduced to low pressure (LP) cylinder flow passage component by cylinder extraction opening, cools down low pressure (LP) cylinder linear leaf using the steam of low pressure, low temperature, from And enable the more effectively cooling low pressure linear leaf of cooling steam, the steam consumption of cooling low pressure (LP) cylinder linear leaf is reduced, vapour is improved The heat supply pump gas ablity of turbine.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Wherein, 1, intermediate pressure cylinder；2, low pressure (LP) cylinder；3, condenser；4, extraction line；5, extraction control valve group；6, cooling steam System, 7, low pressure (LP) cylinder extraction opening, 8, valve, 9, cooling control valve group, 10, flowmeter.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1:
The present invention includes intermediate pressure cylinder 1, and intermediate pressure cylinder 1 connects low pressure (LP) cylinder 2, and the steam discharge of low pressure (LP) cylinder 2 connects condenser 3, low pressure (LP) cylinder 2 Extraction line 4 is connected, is provided with extraction control valve group 5 on extraction line 4, cooling steam system 6 is before extraction control valve group 5 Access 2 flow passage component of low pressure (LP) cylinder, jet chimney of the cooling steam system 6 between extraction control valve group 5 and low pressure (LP) cylinder extraction opening 7 Upper access.
Working method of the invention the following steps are included:
Step 1, the steam discharge of intermediate pressure cylinder 1 are passed through in low pressure (LP) cylinder 2；
Step 2, control cooling steam system 6 is passed through into low pressure (LP) cylinder 2 steams for cooling down the cooling of low pressure (LP) cylinder linear leaf Vapour.
Embodiment 2:
The present invention includes intermediate pressure cylinder 1, and intermediate pressure cylinder 1 connects low pressure (LP) cylinder 2, and the steam discharge of low pressure (LP) cylinder 2 connects condenser 3, low pressure (LP) cylinder 2 Connect extraction line 4, be provided with extraction control valve group 5 on extraction line 4, cooling steam system 6 from extraction control valve group 5 with it is low 2 flow passage component of low pressure (LP) cylinder is accessed on jet chimney between cylinder pressure extraction opening 7, and low pressure (LP) cylinder 2 is connected by mesolow communicating pipe, in It is provided with valve 8 on low pressure communicating pipe, is but provided with cooling control valve group 9 and flowmeter 10 in vapour system 6 accordingly.
Working method of the invention the following steps are included:
Step 1, the steam discharge of intermediate pressure cylinder 1 are passed through in low pressure (LP) cylinder 2；
Step 2 passes through the reading on observation flowmeter 10 by the adjustment low pressure (LP) cylinder 2 of valve 8 on communicating pipe into vapour Control the aperture of cooling control valve group 9, thus control cooling steam system 6 be passed through into low pressure (LP) cylinder 2 it is long for cooling down low pressure (LP) cylinder The flow of the cooling steam of blade.

Claims (6)

1.一种基于抽汽口的低压缸长叶片冷却系统，其特征在于，包括中压缸(1)，中压缸(1)连接低压缸(2)，低压缸(2)的排汽连接凝汽器(3)，低压缸(2)设置有抽汽口(7)，抽汽管道(4)上设置有抽汽控制阀组(5)，冷却蒸汽系统(6)从抽汽控制阀组(5)之前接入低压缸(2)通流部分；1. A low-pressure cylinder long blade cooling system based on the steam extraction port, characterized in that it comprises a medium-pressure cylinder (1), the medium-pressure cylinder (1) is connected to the low-pressure cylinder (2), and the exhaust steam of the low-pressure cylinder (2) is connected The condenser (3), the low-pressure cylinder (2) are provided with a steam extraction port (7), the steam extraction pipe (4) is provided with a steam extraction control valve group (5), and the cooling steam system (6) is connected from the steam extraction control valve Connect the flow part of the low-pressure cylinder (2) before the group (5); 所述中压缸(1)通过中低压连通管连接低压缸(2)，中低压连通管上设置有阀门(8)；The medium-pressure cylinder (1) is connected to the low-pressure cylinder (2) through a medium-low pressure communication pipe, and a valve (8) is arranged on the medium-low pressure communication pipe; 所述冷却蒸汽系统(6)上相应的设置有冷却控制阀组(9)。The cooling steam system (6) is correspondingly provided with a cooling control valve group (9). 2.根据权利要求1所述的一种基于抽汽口的低压缸长叶片冷却系统，其特征在于，所述冷却蒸汽系统(6)上设置有流量计(10)。2. A long-vane cooling system for low-pressure cylinders based on a steam extraction port according to claim 1, characterized in that a flow meter (10) is arranged on the cooling steam system (6). 3.根据权利要求1所述的一种基于抽汽口的低压缸长叶片冷却系统，其特征在于，所述冷却蒸汽系统(6)从抽汽控制阀组(5)与低压缸抽汽口(7)之间的蒸汽管道上接入。3. A kind of low-pressure cylinder long blade cooling system based on the steam extraction port according to claim 1, characterized in that, the cooling steam system (6) is connected from the steam extraction control valve group (5) and the low-pressure cylinder steam extraction port (7) Access on the steam pipe between. 4.权利要求1所述的一种基于抽汽口的低压缸长叶片冷却系统的工作方法，其特征在于，包括以下步骤：4. the working method of a kind of low-pressure cylinder long blade cooling system based on steam extraction port according to claim 1, is characterized in that, comprises the following steps: 步骤一，中压缸(1)的排汽通入低压缸(2)中；Step 1, the exhaust steam of the medium-pressure cylinder (1) is passed in the low-pressure cylinder (2); 步骤二，冷却蒸汽系统(6)从抽汽控制阀组(5)与抽汽口(7)之间的蒸汽管道上向低压缸(2)内通入用于冷却低压缸长叶片的冷却蒸汽。Step 2, the cooling steam system (6) passes the cooling steam for cooling the long blades of the low-pressure cylinder into the low-pressure cylinder (2) from the steam pipeline between the steam extraction control valve group (5) and the steam extraction port (7) . 5.根据权利要求4所述的一种基于抽汽口的低压缸长叶片冷却系统的工作方法，其特征在于，所述步骤二中，通过连通管上的阀门(8)调整低压缸(2)的进汽。5. A kind of working method of the long blade cooling system of the low-pressure cylinder based on the steam extraction port according to claim 4, characterized in that, in said step 2, the valve (8) on the connecting pipe is used to adjust the low-pressure cylinder (2 ) into the steam. 6.根据权利要求4所述的一种基于抽汽口的低压缸长叶片冷却系统的工作方法，其特征在于，所述步骤二中，通过观察流量计(10)上的读数控制冷却控制阀组(9)的开度，从而改变冷却蒸汽系统(6)的蒸汽流量。6. the working method of a kind of low-pressure cylinder long vane cooling system based on steam extraction port according to claim 4, it is characterized in that, in described step 2, control the cooling control valve by observing the reading on the flow meter (10) The opening degree of the group (9), thereby changing the steam flow of the cooling steam system (6).
CN201710385711.9A 2017-05-26 2017-05-26 A kind of low pressure (LP) cylinder linear leaf cooling system and method based on extraction opening Active CN106988803B (en)

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CN110159371B (en) * 2019-06-05 2024-06-21 国家电投集团河南电力有限公司 System and method for cylinder cutting operation of multi-low pressure cylinder steam turbine under partial load
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 Cooling system and method for long blades of steam turbine under cylinder cutting operation
CN110925036B (en) * 2019-12-08 2022-04-12 国网山西省电力公司电力科学研究院 Low-pressure cylinder flexible output cooling system under steam extraction heat supply working condition and operation method thereof

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US4087860A (en) * 1977-07-08 1978-05-02 Westinghouse Electric Corp. System for multi-mode control of a boiler feedpump turbine
US5404724A (en) * 1994-04-07 1995-04-11 Westinghouse Electric Corporation Boiler feedpump turbine drive/feedwater train arrangement
JP2003518220A (en) * 1999-12-21 2003-06-03 シーメンス アクチエンゲゼルシヤフト Operation method of steam turbine equipment and steam turbine equipment operated by this method
CN105888748B (en) * 2016-04-19 2017-05-24 张曙光 Comprehensive energy efficiency system for heating low-pressure cylinder polished shaft cooling and small turbine steam exhaust waste heat recovery
CN206801621U (en) * 2017-05-26 2017-12-26 中国华能集团公司 A kind of low pressure (LP) cylinder linear leaf cooling system based on extraction opening

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