CN113339085A - System for shortening starting time of steam turbine and working method - Google Patents
System for shortening starting time of steam turbine and working method Download PDFInfo
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- CN113339085A CN113339085A CN202110615848.5A CN202110615848A CN113339085A CN 113339085 A CN113339085 A CN 113339085A CN 202110615848 A CN202110615848 A CN 202110615848A CN 113339085 A CN113339085 A CN 113339085A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004904 shortening Methods 0.000 title claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- -1 electricity Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- F01D25/10—Heating, e.g. warming-up before starting
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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
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
- F01D19/02—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith dependent on temperature of component parts, e.g. of turbine-casing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
本发明公开了一种缩短汽轮机启动时间的系统及工作方法，本发明通过在低压旁路上连接低压小旁路，使低压小旁路连接低压缸，在高压缸和中压缸暖缸的同时也对低压缸进行小幅暖缸，达到能缩短启机时间、提高启机经济性，提高系统运行灵活性的效果。
The invention discloses a system and a working method for shortening the start-up time of a steam turbine. In the invention, a small low-pressure bypass is connected to the low-pressure bypass, so that the small low-pressure bypass is connected to a low-pressure cylinder. The low-pressure cylinder is slightly warmed to achieve the effect of shortening the start-up time, improving the start-up economy, and improving the flexibility of the system.
Description
Technical Field
The invention belongs to the field of thermal power generation, and particularly relates to a system for shortening the starting time of a steam turbine and a working method.
Background
The starting mode of the steam turbine is divided into two modes according to the steam inlet mode: the high-pressure cylinder is started, the intermediate pressure cylinder is started, most 300 MW-600 MW units in China are started in two modes, the high-pressure cylinder is safe and reliable in starting, starting time is too long, large units in recent years are started by the intermediate pressure cylinder gradually, starting time is shortened but still can reach 6-9 hours, and the ratio of the warm-up time of a steam turbine to the time for starting the steam turbine to be connected to a power generator to be connected to the power generator is up to 60% at most through statistics of the time for starting the steam turbine to be connected to the power generator. With the rapid increase of clean energy power generation, the requirement on the operation flexibility of a thermal power generating unit is higher and higher, and some units even meet the requirement of two-shift operation, so that how to shorten the starting time of the unit and improve the flexibility of the unit is a key problem of recent research.
Disclosure of Invention
The invention aims to overcome the defects and provide a system for shortening the starting time of a steam turbine and a working method thereof.
In order to achieve the purpose, the system for shortening the starting time of the steam turbine comprises a low-pressure cylinder, an intermediate-pressure cylinder, a high-pressure cylinder and a boiler, wherein the boiler is connected with the intermediate-pressure cylinder through a low-pressure bypass, the low-pressure bypass is connected with a low-pressure small bypass, and the low-pressure small bypass is connected with a low-pressure cylinder.
And a low-pressure bypass control valve is arranged on the low-pressure bypass.
And a low-pressure small bypass control valve is arranged on the low-pressure small bypass.
The low-pressure bypass is connected with the condenser.
The low-pressure cylinder is connected with a generator.
A high-pressure bypass is arranged between the boiler and the high-pressure cylinder.
The high-pressure bypass is provided with a high-pressure bypass regulating valve.
The low pressure small bypass has a current capacity of VWO condition 10%.
A method of operating a system for reducing the startup time of a steam turbine, comprising the steps of:
when the unit is started, when the intermediate pressure cylinder enters steam, the low-pressure bypass passes through the low-pressure small bypass to introduce part of steam into the low-pressure cylinder, and the low-pressure cylinder is also warmed while the high-pressure cylinder and the intermediate pressure cylinder are warmed.
When the steam inlet amount of the middle pressure cylinder reaches the required standard and sufficient steam flows to the low pressure cylinder, the low pressure small bypass control valve is closed, and the low pressure bypass control valve is closed according to the requirement.
Compared with the prior art, the low-pressure bypass is connected with the low-pressure small bypass, so that the low-pressure small bypass is connected with the low-pressure cylinder, the high-pressure cylinder and the medium-pressure cylinder are heated, and the low-pressure cylinder is heated slightly at the same time, so that the effects of shortening the starting time, improving the starting economy and improving the operation flexibility of the system are achieved.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
the system comprises a low-pressure cylinder 1, a low-pressure cylinder 2, an intermediate-pressure cylinder 3, a high-pressure cylinder 4, a boiler 5, a low-pressure bypass control valve 6, a low-pressure small bypass control valve 7, a generator 8 and a high-pressure bypass regulating valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a system for shortening the starting time of a steam turbine comprises a low-pressure cylinder 1, an intermediate-pressure cylinder 2, a high-pressure cylinder 3 and a boiler 4, wherein the boiler 4 is connected with the intermediate-pressure cylinder 2 through a low-pressure bypass, the low-pressure bypass is connected with a low-pressure small bypass, and the low-pressure small bypass is connected with the low-pressure cylinder 1. And a low-pressure bypass control valve 5 is arranged on the low-pressure bypass. And a low-pressure small bypass control valve 6 is arranged on the low-pressure small bypass. The low-pressure bypass is connected with the condenser. The low pressure cylinder 1 is connected with a generator 7. A high-pressure bypass is arranged between the boiler 4 and the high-pressure cylinder 3. The high-pressure bypass is provided with a high-pressure bypass regulating valve 8. The low pressure small bypass has a current capacity of VWO condition 10%.
A method of operating a system for reducing the startup time of a steam turbine, comprising the steps of:
when the unit is started, when the intermediate pressure cylinder 2 enters steam, the low-pressure bypass control valve 5 and the low-pressure small bypass control valve 6 are opened, the low-pressure bypass supplies partial steam to the low-pressure cylinder 1 through the low-pressure small bypass, and the high-pressure cylinder 3 and the intermediate pressure cylinder 2 warm the low-pressure cylinder 1 at the same time. When the steam inlet amount of the middle pressure cylinder 2 reaches the required standard and sufficient steam flows to the low pressure cylinder 1, the low pressure small bypass control valve 6 is closed, and the low pressure bypass control valve 5 is closed according to the requirement.
The small bypass of the low-pressure cylinder of the steam turbine is additionally arranged, steam is introduced into the low-pressure cylinder in the starting process, the low-pressure cylinder is slightly warmed while the high-pressure cylinder and the medium-pressure cylinder are warmed, the warming time is shortened, and the warming time can be expected to be shortened by 0.5-1 hour.
The steam turbine warm-up time is shortened, finally the start-up time is shortened, the flexibility of the unit is improved, meanwhile, after the steam turbine time is shortened, the consumption of water, electricity, coal and the like in the starting process is reduced, and the warm-up economy is improved.
Claims (10)
1. The utility model provides a shorten steam turbine start-up time's system, its characterized in that includes low pressure jar (1), intermediate pressure jar (2), high-pressure jar (3) and boiler (4), and boiler (4) are through low pressure bypass connection intermediate pressure jar (2), and the little bypass of low pressure is connected to the low pressure bypass, and low pressure jar (1) is connected to the little bypass of low pressure.
2. The system for shortening the startup time of a steam turbine according to claim 1, wherein a low pressure bypass control valve (5) is provided on the low pressure bypass.
3. The system for shortening the startup time of a steam turbine according to claim 1, wherein the low pressure small bypass is provided with a low pressure small bypass control valve (6).
4. The system for reducing the startup time of a steam turbine according to claim 1, wherein the low pressure bypass is connected to a condenser.
5. A system for reducing the startup time of a steam turbine according to claim 1, characterized in that the low pressure cylinder (1) is connected to a generator (7).
6. A system for reducing the startup time of a steam turbine according to claim 1, characterized in that a high pressure bypass is provided between the boiler (4) and the high pressure cylinder (3).
7. A system for reducing the startup time of a steam turbine according to claim 6, characterized in that the high pressure bypass is provided with a high pressure bypass regulating valve (8).
8. The system for reducing the startup time of a steam turbine according to claim 1, wherein the low pressure bypass path has a current capacity of VWO condition 10%.
9. A method of operating a system for reducing the startup time of a steam turbine according to claim 1, comprising the steps of:
when the unit is started, when the intermediate pressure cylinder (2) enters steam, the low-pressure bypass passes through the low-pressure small bypass to introduce part of steam into the low-pressure cylinder (1), and the low-pressure cylinder (1) is warmed while the high-pressure cylinder (3) and the intermediate pressure cylinder (2) warm the cylinder.
10. A method of operating a system for reducing the startup time of a steam turbine according to claim 1, characterized in that the low pressure small bypass control valve (6) is closed when the steam admission to the intermediate pressure cylinder (2) reaches a desired level and a sufficient amount of steam flows to the low pressure cylinder (1), and the low pressure bypass control valve (5) is closed as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110615848.5A CN113339085A (en) | 2021-06-02 | 2021-06-02 | System for shortening starting time of steam turbine and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110615848.5A CN113339085A (en) | 2021-06-02 | 2021-06-02 | System for shortening starting time of steam turbine and working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113339085A true CN113339085A (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110615848.5A Pending CN113339085A (en) | 2021-06-02 | 2021-06-02 | System for shortening starting time of steam turbine and working method |
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| Country | Link |
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| CN (1) | CN113339085A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205779041U (en) * | 2016-05-30 | 2016-12-07 | 河南华润电力古城有限公司 | A kind of steam turbine and heating system |
| CN207892673U (en) * | 2017-12-26 | 2018-09-21 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | A kind of high middle cylinder combined launch high consistency tower control system of NCB types steam turbine |
| CN111706410A (en) * | 2020-06-01 | 2020-09-25 | 广东粤电靖海发电有限公司 | Coal-fired unit steam turbine steam-supply-free starting method and system |
| CN212673163U (en) * | 2020-06-15 | 2021-03-09 | 上海申能电力科技有限公司 | Steam heating starting system of once-through boiler |
| WO2021073556A1 (en) * | 2019-10-15 | 2021-04-22 | 中国电建集团山东电力建设第一工程有限公司 | Steam turbine circulating cooling water system and operating method therefor |
| CN112814752A (en) * | 2021-01-08 | 2021-05-18 | 西安热工研究院有限公司 | Rapid starting system and method for thermal generator set in medium pressure cylinder starting mode |
| CN214836570U (en) * | 2021-06-02 | 2021-11-23 | 西安热工研究院有限公司 | System for improving starting economy |
-
2021
- 2021-06-02 CN CN202110615848.5A patent/CN113339085A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205779041U (en) * | 2016-05-30 | 2016-12-07 | 河南华润电力古城有限公司 | A kind of steam turbine and heating system |
| CN207892673U (en) * | 2017-12-26 | 2018-09-21 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | A kind of high middle cylinder combined launch high consistency tower control system of NCB types steam turbine |
| WO2021073556A1 (en) * | 2019-10-15 | 2021-04-22 | 中国电建集团山东电力建设第一工程有限公司 | Steam turbine circulating cooling water system and operating method therefor |
| CN111706410A (en) * | 2020-06-01 | 2020-09-25 | 广东粤电靖海发电有限公司 | Coal-fired unit steam turbine steam-supply-free starting method and system |
| CN212673163U (en) * | 2020-06-15 | 2021-03-09 | 上海申能电力科技有限公司 | Steam heating starting system of once-through boiler |
| CN112814752A (en) * | 2021-01-08 | 2021-05-18 | 西安热工研究院有限公司 | Rapid starting system and method for thermal generator set in medium pressure cylinder starting mode |
| CN214836570U (en) * | 2021-06-02 | 2021-11-23 | 西安热工研究院有限公司 | System for improving starting economy |
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