CN106988804B - A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge - Google Patents
A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge Download PDFInfo
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- CN106988804B CN106988804B CN201710385756.6A CN201710385756A CN106988804B CN 106988804 B CN106988804 B CN 106988804B CN 201710385756 A CN201710385756 A CN 201710385756A CN 106988804 B CN106988804 B CN 106988804B
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- cylinder
- low pressure
- steam discharge
- steam
- feed pump
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Classifications
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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
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
-
- 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
- F01D25/30—Exhaust heads, chambers, or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a kind of low pressure (LP) cylinder linear leaf cooling systems and method based on feed pump turbine steam discharge, using the recycling and reusing that the cooling low pressure (LP) cylinder linear leaf of feed pump small steam turbine exhaust steam is to the cold end steam discharge in former design scheme, it can reduce consumption of the low pressure (LP) cylinder linear leaf to cooling steam, improve unit heat supply pump gas ablity.In addition, steam source under the conditions of little volume flow for cooling down low pressure (LP) cylinder linear leaf is intermediate pressure cylinder steam discharge, and vapor (steam) temperature is higher, does not utilize the cooling of low pressure (LP) cylinder linear leaf in former design scheme.And when utilizing feed pump small steam turbine exhaust steam cooling low pressure (LP) cylinder linear leaf, the temperature of cooling steam is lower, and cooling effect is more preferable.
Description
Technical field
The invention belongs to turbine system design fields, and in particular to a kind of low pressure (LP) cylinder based on feed pump turbine steam discharge
Linear leaf 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 not less than certain limit value flow
(typically about 10%~30% or so of declared working condition main steam flow).For thermal power plant unit, limited by low pressure (LP) cylinder exhaust steam flow
The influence of value, steam turbine heat supply pump gas ablity are 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) cylinders based on feed pump turbine steam discharge to come into leaves
Piece cooling system and method, by reducing cooling low pressure (LP) cylinder and coming into leaves using the cooling low pressure (LP) cylinder linear leaf of feed pump turbine steam discharge
The steam consumption of piece 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 feed pump turbine steam discharge, including
Intermediate pressure cylinder, intermediate pressure cylinder connect low pressure (LP) cylinder, and the steam discharge of low pressure (LP) cylinder connects condenser, and low pressure (LP) cylinder connects extraction line, on extraction line
It is provided with extraction control valve group, the steam discharge of feed pump turbine accesses low pressure (LP) cylinder flow passage component.
The low pressure (LP) cylinder is equipped with low pressure (LP) cylinder extraction opening and auxiliary pipeline system, and the steam discharge of feed pump turbine accesses steam extraction control
Between valve group processed and low pressure (LP) cylinder extraction opening.
The steam discharge of the feed pump turbine is through-flow by level-one any in low pressure (LP) cylinder or more bleedings mouth access low pressure (LP) cylinder
Part.
Steam discharge control valve group is provided on pipeline between medium pressure cylinder and low pressure (LP) cylinder.
A method of the low pressure (LP) cylinder linear leaf cooling system based on feed pump turbine steam discharge, comprising the following steps:
Step 1, when operation, feed pump turbine steam discharge enters low-pressure heater by extraction line and heats condensate, has more than needed
Steam discharge return low pressure (LP) cylinder acting；
Step 2 turns down the extraction control valve group on extraction line, will give when needing cooling low pressure (LP) cylinder linear leaf operation
The steam discharge of water pump steam turbine accesses turbine low pressure cylinder flow passage component by low pressure (LP) cylinder extraction opening, comes into leaves for cooling down low pressure (LP) cylinder
Piece, and the exhaust steam flow for entering low pressure (LP) cylinder is adjusted by extraction control valve group.
In the step 2, change the displacement for being passed through low pressure (LP) cylinder by adjusting steam discharge control valve group.
Compared with prior art, the present invention using the cooling low pressure (LP) cylinder linear leaf of feed pump small steam turbine exhaust steam is designed original
The recycling and reusing of cold end steam discharge in scheme can reduce consumption of the low pressure (LP) cylinder linear leaf to cooling steam, improves unit and supplies
Hot pump gas ablity.In addition, coming under the conditions of little volume flow for cooling down the steam of low pressure (LP) cylinder linear leaf in former design scheme
Source is intermediate pressure cylinder steam discharge, and vapor (steam) temperature is higher, does not utilize the cooling of low pressure (LP) cylinder linear leaf.And utilize feed pump small steam turbine exhaust steam
When cooling low pressure (LP) cylinder linear leaf, the temperature of cooling steam is lower, and cooling effect is more preferable.
Detailed description of the invention
Fig. 1 is system construction drawing of the invention；
Wherein, 1, intermediate pressure cylinder；2, low pressure (LP) cylinder；3, feed pump turbine；4, condenser；5, extraction control valve group；6, low pressure
Cylinder extraction opening, 7, steam discharge control valve group.
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 4, low pressure (LP) cylinder 2
Extraction line is connected, extraction control valve group 5 is provided on extraction line, the steam discharge access low pressure (LP) cylinder 2 of feed pump turbine 3 is through-flow
Part, low pressure (LP) cylinder 2 are equipped with low pressure (LP) cylinder extraction opening 6 and auxiliary pipeline system, and the steam discharge of feed pump turbine 3 accesses extraction control valve
Between group 5 and low pressure (LP) cylinder extraction opening 6.
Working method of the invention the following steps are included:
Step 1, when operation, 3 steam discharge of feed pump turbine enters low-pressure heater by extraction line and heats condensate, rich
Remaining steam discharge returns to low pressure (LP) cylinder acting；
Step 2 turns down the extraction control valve group 5 on extraction line when needing cooling low pressure (LP) cylinder linear leaf operation, will
The steam discharge of feed pump turbine 3 accesses 2 flow passage component of turbine low pressure cylinder by low pressure (LP) cylinder extraction opening 6, for cooling down low pressure (LP) cylinder
Linear leaf, and the exhaust steam flow for entering low pressure (LP) cylinder 2 is adjusted by extraction control valve group 5.
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 4, low pressure (LP) cylinder 2
Extraction line is connected, extraction control valve group 5 is provided on extraction line, the steam discharge access low pressure (LP) cylinder 2 of feed pump turbine 3 is through-flow
Part, low pressure (LP) cylinder 2 are equipped with low pressure (LP) cylinder extraction opening 6 and auxiliary pipeline system, and the steam discharge of feed pump turbine 3 accesses extraction control valve
Between group 5 and low pressure (LP) cylinder extraction opening 6, the steam discharge of feed pump turbine 3 is connect by level-one any in low pressure (LP) cylinder 2 or more bleedings mouth
Enter 2 flow passage component of low pressure (LP) cylinder, is provided with steam discharge control valve group 7 on the pipeline between intermediate pressure cylinder 1 and low pressure (LP) cylinder 2.
Working method of the invention the following steps are included:
Step 1, when operation, 3 steam discharge of feed pump turbine enters low-pressure heater by extraction line and heats condensate, rich
Remaining steam discharge returns to low pressure (LP) cylinder acting；
Step 2 is passed through low pressure by adjusting the change of steam discharge control valve group 7 when needing cooling low pressure (LP) cylinder linear leaf operation
The displacement of cylinder 2 turns down the extraction control valve group 5 on extraction line, and the steam discharge of feed pump turbine 3 is passed through low pressure (LP) cylinder steam extraction
Mouth 6 accesses 2 flow passage components of turbine low pressure cylinder, for cooling down low pressure (LP) cylinder linear leaf, and is adjusted and is entered by extraction control valve group 5
The exhaust steam flow of low pressure (LP) cylinder 2.
Claims (4)
1. a kind of low pressure (LP) cylinder linear leaf cooling system based on feed pump turbine steam discharge, which is characterized in that including intermediate pressure cylinder
(1), the steam discharge of intermediate pressure cylinder (1) connection low pressure (LP) cylinder (2), low pressure (LP) cylinder (2) connects condenser (4), and low pressure (LP) cylinder (2) connects extraction steam pipe
Road is provided with extraction control valve group (5) on extraction line, and the steam discharge of feed pump turbine (3) accesses low pressure (LP) cylinder (2) through-flow portion
Point；
The low pressure (LP) cylinder (2) is equipped with low pressure (LP) cylinder extraction opening (6) and auxiliary pipeline system, and the steam discharge of feed pump turbine (3) accesses
Jet chimney of the position between extraction control valve group (5) and low pressure (LP) cylinder extraction opening (6)；
The steam discharge of the feed pump turbine (3) passes through level-one any in low pressure (LP) cylinder (2) or more bleedings mouth access low pressure (LP) cylinder (2)
Flow passage component.
2. a kind of low pressure (LP) cylinder linear leaf cooling system based on extraction opening according to claim 1, which is characterized in that described
Steam discharge control valve group (7) are provided on pipeline between intermediate pressure cylinder (1) and low pressure (LP) cylinder (2).
3. a kind of method of low pressure (LP) cylinder linear leaf cooling system based on feed pump turbine steam discharge described in claim 1,
It is characterized in that, comprising the following steps:
Step 1, when operation, feed pump turbine (3) steam discharge enters low-pressure heater by extraction line and heats condensate, has more than needed
Steam discharge return low pressure (LP) cylinder acting；
Step 2 turns down the extraction control valve group (5) on extraction line, will give when needing cooling low pressure (LP) cylinder linear leaf operation
The steam discharge of water pump steam turbine (3) accesses turbine low pressure cylinder (2) flow passage component by low pressure (LP) cylinder extraction opening (6), low for cooling down
Cylinder pressure linear leaf, and the exhaust steam flow for entering low pressure (LP) cylinder (2) is adjusted by extraction control valve group (5).
4. a kind of side of low pressure (LP) cylinder linear leaf cooling system based on feed pump turbine steam discharge according to claim 3
Method, which is characterized in that in the step 2, change the displacement for being passed through low pressure (LP) cylinder (2) by adjusting steam discharge control valve group (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710385756.6A CN106988804B (en) | 2017-05-26 | 2017-05-26 | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710385756.6A CN106988804B (en) | 2017-05-26 | 2017-05-26 | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106988804A CN106988804A (en) | 2017-07-28 |
| CN106988804B true CN106988804B (en) | 2019-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710385756.6A Active CN106988804B (en) | 2017-05-26 | 2017-05-26 | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge |
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| CN (1) | CN106988804B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607480B (en) * | 2022-03-11 | 2024-05-14 | 西安热工研究院有限公司 | BEST (test) small-machine double-machine steam source serial complementary structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103498708A (en) * | 2013-10-10 | 2014-01-08 | 中国电力工程顾问集团华东电力设计院 | Air-cooling reheating unit system arranged in small back-pressure type steam turbine and used for driving feed pump |
| CN105863759A (en) * | 2016-04-19 | 2016-08-17 | 刘子旺 | Dead steam cooling and recycling system for steam-driven water feed pump in high-back-pressure modification system of wet-cold thermal power unit |
| CN105888748A (en) * | 2016-04-19 | 2016-08-24 | 刘子旺 | Comprehensive energy efficiency system for heating low-pressure cylinder polished shaft cooling and small turbine steam exhaust waste heat recovery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207245769U (en) * | 2017-05-26 | 2018-04-17 | 西安热工研究院有限公司 | A kind of low pressure (LP) cylinder linear leaf cooling system based on feed pump turbine steam discharge |
-
2017
- 2017-05-26 CN CN201710385756.6A patent/CN106988804B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103498708A (en) * | 2013-10-10 | 2014-01-08 | 中国电力工程顾问集团华东电力设计院 | Air-cooling reheating unit system arranged in small back-pressure type steam turbine and used for driving feed pump |
| CN105863759A (en) * | 2016-04-19 | 2016-08-17 | 刘子旺 | Dead steam cooling and recycling system for steam-driven water feed pump in high-back-pressure modification system of wet-cold thermal power unit |
| CN105888748A (en) * | 2016-04-19 | 2016-08-24 | 刘子旺 | Comprehensive energy efficiency system for heating low-pressure cylinder polished shaft cooling and small turbine steam exhaust waste heat recovery |
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| CN106988804A (en) | 2017-07-28 |
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