CN103628934B - Temperature and pressure reducing device for steam turbine shaft seal - Google Patents
Temperature and pressure reducing device for steam turbine shaft seal Download PDFInfo
- Publication number
- CN103628934B CN103628934B CN201310556509.XA CN201310556509A CN103628934B CN 103628934 B CN103628934 B CN 103628934B CN 201310556509 A CN201310556509 A CN 201310556509A CN 103628934 B CN103628934 B CN 103628934B
- Authority
- CN
- China
- Prior art keywords
- steam
- shaft seal
- valve
- desuperheater
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to a shaft seal steam supply system, in particular to a temperature and pressure reducing device for a steam turbine shaft seal. The purpose is to solve the problem that in the prior art, steam supply pressure of the steam turbine shaft seal is not stable. The temperature and pressure reducing device for the steam turbine shaft seal comprises a steam boiler and further comprises a temperature reducing device, wherein the steam inlet end of the temperature reducing device is connected with the steam boiler through a steam inlet pipe provided with a steam inlet valve, and the steam outlet end of the temperature reducing deice is connected with the two ends of a steam turbine through a steam outlet pipe provided with a steam outlet valve. A water supply pipe is arranged at the position, close to the steam inlet end, of the temperature reducing device. The temperature reducing device is arranged between the steam boiler and the steam turbine, steam generated in the steam boiler is subject to temperature and pressure reducing to certain parameters, then the steam is stably supplied to the shaft seal, the steam supply pressure of the shaft seal can be kept stable no matter how loads of the steam turbine fluctuate, and besides the problem of threshold exceeding in the hot start process is solved.
Description
Technical field
The present invention relates to a kind of shaft seal steam supply system, particularly relate to turbine shaft seal reducing-and-cooling plant.
Background technique
At present, the initial steam that steam boiler produces mainly directly is supplied shaft seal by the shaft seal of steam turbine, and pressure of steam supply is unstable, steam turbine is when hot starting, hot start, steam turbine can be caused to exceed standard rushing critical speed of rotation vibrations, and causing cannot normal boot-strap, and original shaft seal steam supply system can not meet the demands; When the operating load reception main electricity determining by heat pattern of mode of steam turbine, because the load of steam turbine is comparatively large, and cause the frequent adjustment of shaft seal steam pressure needs, affect the vacuum of steam turbine and have a strong impact on the safe operation of equipment.
Summary of the invention
The invention provides turbine shaft seal reducing-and-cooling plant, be intended to the problem solving turbine shaft seal pressure of steam supply instability in prior art.
In order to solve above technical problem, the present invention is achieved through the following technical solutions: turbine shaft seal reducing-and-cooling plant, comprise steam boiler, also comprise the desuperheater of admission end by being connected with steam boiler with the steam inlet pipe of steam inlet valve, the steam output end of described desuperheater is connected with steam turbine two ends by the steam outlet pipe with gas outlet valve, described desuperheater is connected with the water pipe of band water supply valve near admission end place.
Further, desuperheater is provided with pressure gauge near steam output end place; Be convenient to measure the pressure of steam supply in desuperheater.
Further, desuperheater is provided with thermometer near steam output end place; Be convenient to measure the temperature in desuperheater.
Further, desuperheater is provided with the first drain pipe of band first drain valve near steam output end place, described first drain pipe is positioned at the bottom of desuperheater; The moisture of the impurity in desuperheater and condensation is convenient to discharge from the first drain pipe.
Further, the part on described steam inlet pipe between steam inlet valve and steam boiler is provided with separating valve; When desuperheater breaks down, be convenient to by separating valve, whole system be closed.
Further, described steam boiler is also connected with a steam transmitting pipe be directly connected with steam turbine two ends, described steam transmitting pipe is provided with defeated steam valve; For subsequent use when desuperheater breaks down, be convenient to steam supply and do not stop.
Further, the second drain pipe of band second drain valve is provided with below described steam transmitting pipe; The water condensed in steam transmitting pipe is convenient to be discharged by the second drain pipe.
Compared with prior art advantage of the present invention is: be provided with desuperheater between steam boiler and steam turbine in the present invention, the steam cooling produced in steam boiler can be depressurized to certain parameter, and then steam stable is supplied shaft seal, no matter how the load of steam turbine fluctuates, the pressure of steam supply of shaft seal can keep stable, also solves the critical difficult problem exceeded standard of hot starting, hot start.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is structural representation of the present invention.
Embodiment
Consult Fig. 1, turbine shaft seal reducing-and-cooling plant, comprise steam boiler 1, also comprise the desuperheater 2 by being connected with steam boiler 1 with the steam inlet pipe 9 of steam inlet valve 8, steam inlet pipe 9 is connected with the admission end of desuperheater 2, the steam output end of described desuperheater 2 is connected with steam turbine 16 two ends by the steam outlet pipe 7 with gas outlet valve 10, described desuperheater 2 is connected with the water pipe 4 of band water supply valve 3 near admission end place; Steam outlet pipe 7 is connected with steam turbine 16 two ends and realizes in the following manner: the front end of described steam turbine 16 is provided with the front steam seal pipe 17 being with front steam seal modulating valve 18, the rear end of described steam turbine 16 is provided with the rear packing pipe 20 of the rear packing modulating valve 19 of band, and front steam seal pipe 17 is all connected with steam outlet pipe 7 with rear packing pipe 20.
Desuperheater 2 is provided with pressure gauge 12 near steam output end place; Desuperheater 2 is provided with thermometer 13 near steam output end place; Desuperheater 2 is provided with the first drain pipe 6 of band first drain valve 5 near steam output end place, described first drain pipe 6 is positioned at the bottom of desuperheater 2; Part on described steam inlet pipe 9 between steam inlet valve 8 and steam boiler 1 is provided with separating valve 11; Described steam boiler 1 is also connected with a steam transmitting pipe 14 be directly connected with steam turbine 16 two ends, described steam transmitting pipe 14 is provided with defeated steam valve 15, and described defeated steam valve 15 is connected with rear packing pipe 20 with front steam seal pipe 17; The second drain pipe 21 of band second drain valve 22 is provided with below described steam transmitting pipe 14.
Before use, steam inlet valve 8, water supply valve 3 and defeated steam valve 15 are closed, separating valve 11 and gas outlet valve 10 are opened.
Use operating procedure is as follows:
The first step: open front steam seal modulating valve 18 and rear packing modulating valve 19, is all adjusted to slightly larger than normal operation.
Second step: slightly drive steam valve 8 into.
3rd step: slightly open water supply valve 3, keep vapor (steam) temperature higher than within 20 DEG C, the cylinder of steam turbine 16, Stress control is at 0.1 ~ 0.2MP.
Low four steps: after regulating water supply valve 3 and steam inlet valve 8 to keep shaft seal to emit vapour amount to meet the requirements, steam turbine 16 hot starting, hot start starts to vacuumize.
In order to prevent the cylinder temperature of steam turbine 16 before red switch too high, start immediately after shaft seal steam to vacuumize; Regularly open the first drain valve 5, get rid of the water of condensation in desuperheater 2.
Desuperheater is provided with between steam boiler and steam turbine in the present invention, the steam cooling produced in steam boiler can be depressurized to certain parameter, and then steam stable is supplied shaft seal, no matter how the load of steam turbine fluctuates, the pressure of steam supply of shaft seal can keep stable, also solves the critical difficult problem exceeded standard of hot starting, hot start, is also provided with pressure gauge and thermometer and is convenient to measure the pressure and temperature in desuperheater, when desuperheater breaks down, steam supply can be continued by steam transmitting pipe.
The foregoing is only specific embodiments of the invention, but technical characteristics of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.
Claims (1)
1. turbine shaft seal reducing-and-cooling plant, comprise steam boiler (1), it is characterized in that: also comprise the desuperheater (2) by being connected with steam boiler (1) with the steam inlet pipe (9) of steam inlet valve (8), the steam output end of described desuperheater (2) is connected with steam turbine (16) two ends by the steam outlet pipe (7) with gas outlet valve (10), the upper water pipe (4) being connected with band water supply valve (3) near admission end place of described desuperheater (2); Described steam boiler (1) is also connected with a steam transmitting pipe (14) be directly connected with steam turbine (16) two ends, described steam transmitting pipe (14) is provided with defeated steam valve (15); Described steam transmitting pipe (14) below is provided with second drain pipe (21) of band second drain valve (22); Desuperheater (2) is upper is provided with pressure gauge (12) near steam output end place; Desuperheater (2) is upper is provided with thermometer (13) near steam output end place; Upper the first drain pipe (6) being provided with band first drain valve (5) near steam output end place of desuperheater (2), described first drain pipe (6) is positioned at the bottom of desuperheater (2); The part described steam inlet pipe (9) is positioned between steam inlet valve (8) and steam boiler (1) is provided with separating valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310556509.XA CN103628934B (en) | 2013-11-11 | 2013-11-11 | Temperature and pressure reducing device for steam turbine shaft seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310556509.XA CN103628934B (en) | 2013-11-11 | 2013-11-11 | Temperature and pressure reducing device for steam turbine shaft seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103628934A CN103628934A (en) | 2014-03-12 |
| CN103628934B true CN103628934B (en) | 2015-07-15 |
Family
ID=50210345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310556509.XA Active CN103628934B (en) | 2013-11-11 | 2013-11-11 | Temperature and pressure reducing device for steam turbine shaft seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103628934B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5799214A (en) * | 1980-12-12 | 1982-06-19 | Hitachi Ltd | Temperature control apparatus for gland seal vapor in steam turbine |
| US4589256A (en) * | 1982-10-20 | 1986-05-20 | Tokyo Shibaura Denki Kabushiki Kaisha | Steam turbine plant |
| CN201301730Y (en) * | 2008-10-30 | 2009-09-02 | 中国长江动力公司(集团) | Steam seal pressure adjusting device for steam seal system of turbine |
| CN201448126U (en) * | 2009-07-16 | 2010-05-05 | 高邮市龙华机械制造厂 | Electronic type steam seal regulator |
| CN202047869U (en) * | 2011-05-12 | 2011-11-23 | 宝钢集团新疆八一钢铁有限公司 | Steam turbine set steam sealing pressure equalizing box device |
| CN202718713U (en) * | 2012-07-13 | 2013-02-06 | 西安兴仪启动发电试运有限公司 | Steam turbine shaft seal and temperature reducing control system |
| CN203515693U (en) * | 2013-11-11 | 2014-04-02 | 长兴新城环保有限公司 | Temperature and pressure reducing device for turbine shaft seal |
-
2013
- 2013-11-11 CN CN201310556509.XA patent/CN103628934B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5799214A (en) * | 1980-12-12 | 1982-06-19 | Hitachi Ltd | Temperature control apparatus for gland seal vapor in steam turbine |
| US4589256A (en) * | 1982-10-20 | 1986-05-20 | Tokyo Shibaura Denki Kabushiki Kaisha | Steam turbine plant |
| CN201301730Y (en) * | 2008-10-30 | 2009-09-02 | 中国长江动力公司(集团) | Steam seal pressure adjusting device for steam seal system of turbine |
| CN201448126U (en) * | 2009-07-16 | 2010-05-05 | 高邮市龙华机械制造厂 | Electronic type steam seal regulator |
| CN202047869U (en) * | 2011-05-12 | 2011-11-23 | 宝钢集团新疆八一钢铁有限公司 | Steam turbine set steam sealing pressure equalizing box device |
| CN202718713U (en) * | 2012-07-13 | 2013-02-06 | 西安兴仪启动发电试运有限公司 | Steam turbine shaft seal and temperature reducing control system |
| CN203515693U (en) * | 2013-11-11 | 2014-04-02 | 长兴新城环保有限公司 | Temperature and pressure reducing device for turbine shaft seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103628934A (en) | 2014-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203515693U (en) | Temperature and pressure reducing device for turbine shaft seal | |
| CN107905858B (en) | Final stage safety flow monitoring and controlling system and method | |
| CN107605541A (en) | Prevent 1000MW supercritical turbine packings from seizing axle envelope electric heater system and method | |
| CN107075974A (en) | With turbine control unit of the Thermal Stress Control device as master controller | |
| CN104018890A (en) | Turbine low pressure cylinder end shaft seal steam supply system | |
| CN103628937B (en) | Method for better utilizing waste gas of turboset | |
| CN105019957B (en) | Efficiently heat regenerative system and method | |
| CN103628934B (en) | Temperature and pressure reducing device for steam turbine shaft seal | |
| CN204514104U (en) | A kind of thermal power plant evacuation system for steam condenser energy saver | |
| CN204851349U (en) | High -efficient heat regenerative system | |
| CN111023077A (en) | Drainage system with external cooler for low-pressure heater and control method | |
| CN102322307A (en) | Condensed water automatic discharging system of water-feeding pump steam turbine of direct air cooling unit | |
| CN202122091U (en) | Tobacco flake vacuum moisture regaining device | |
| CN203906014U (en) | Steam supplying system of turbine low-pressure cylinder end shaft seal | |
| CN204691830U (en) | A kind of turbine by-pass control gear | |
| CN203626899U (en) | Flutter monitoring and early warning protection system for high-back-pressure operation last-stage blades of air cooling unit | |
| CN106988803A (en) | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on extraction opening | |
| KR102055378B1 (en) | How to cool a steam turbine | |
| CN102967100A (en) | Wind turbine generator system-cooling system | |
| CN207132322U (en) | A kind of burn-out-proof equipment for drying monitored in real time | |
| CN206801621U (en) | A kind of low pressure (LP) cylinder linear leaf cooling system based on extraction opening | |
| RU2709895C2 (en) | Multi-stage steam turbine for generation of electric power | |
| CN204574853U (en) | Water vapor condenser vacuum extractor | |
| CN204665294U (en) | A kind of Steam Soot-Blower System for Subcritical Utility Boiler | |
| CN208534547U (en) | Based on the device for solving the auxiliary vapour main pipe safety door frequent movement of M701F combined cycle unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Steam turbine shaft seal temperature and pressure reducing device Effective date of registration: 20210720 Granted publication date: 20150715 Pledgee: Changxin Zhejiang rural commercial bank Limited by Share Ltd. Pledgor: CHANGXING XINCHENG ENVIRONMENTAL PROTECTION Co.,Ltd. Registration number: Y2021330000944 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |