CN203515693U - Temperature and pressure reducing device for turbine shaft seal - Google Patents
Temperature and pressure reducing device for turbine shaft seal Download PDFInfo
- Publication number
- CN203515693U CN203515693U CN201320707877.5U CN201320707877U CN203515693U CN 203515693 U CN203515693 U CN 203515693U CN 201320707877 U CN201320707877 U CN 201320707877U CN 203515693 U CN203515693 U CN 203515693U
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- steam
- desuperheater
- shaft seal
- valve
- pipe
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Abstract
The utility model relates to a shaft seal system, in particular to a temperature and pressure reducing device for a turbine shaft seal, and aims to solve the problem of unstable pressure of steam supply for the turbine shaft seal in the prior art. The temperature and pressure reducing device comprises a steam boiler, and further comprises a desuperheater of which the steam end is connected with the steam boiler through a steam inlet pipe with a steam inlet valve; the steam outlet end of the desuperheater is connected with two ends of a turbine through a steam outlet pipe with a steam outlet valve; the part of the desuperheater, which is close to the steam inlet end, is connected with a water supply pipe with a water supply valve. According to the utility model, the desuperheater is arranged between the steam boiler and the turbine, therefore, steam generated in the steam boiler can be reduced in both temperature and pressure to meet certain parameters, the steam can be supplied to the shaft seal in a stable manner, the pressure of the supplied steam is maintained stable however the load of the turbine fluctuates, and the problem of critical exceeding during hot start is solved.
Description
Technical field
The utility model relates to a kind of shaft seal steam supply system, relates in particular to turbine shaft seal reducing-and-cooling plant.
Background technique
At present, the shaft seal of steam turbine is mainly that the initial steam that steam boiler is produced is directly supplied with shaft seal, and pressure of steam supply is unstable, steam turbine is when hot starting, hot start, can cause steam turbine to exceed standard rushing critical speed of rotation vibrations, causing cannot normal boot-strap, and original shaft seal steam supply system can not meet the demands; When the main electricity determining by heat pattern of operating load reception mode of steam turbine, because the load of steam turbine is larger, and cause the frequent adjusting of shaft seal steam pressure needs, affect the vacuum of steam turbine and have a strong impact on the safe operation of equipment.
Model utility content
The utility model provides turbine shaft seal reducing-and-cooling plant, is intended to solve the unsettled problem of turbine shaft seal pressure of steam supply in prior art.
In order to solve above technical problem, the utility model is achieved through the following technical solutions: turbine shaft seal reducing-and-cooling plant, comprise steam boiler, also comprise that admission end passes through the desuperheater that the steam inlet pipe with steam inlet valve is connected with steam boiler, the steam output end of described desuperheater is connected with steam turbine two ends by the steam outlet pipe with gas outlet valve, on described desuperheater, near admission end place, is connected with the water pipe with water supply valve.
Further, on desuperheater, near steam output end place, be provided with pressure gauge; Be convenient to measure the pressure of steam supply in desuperheater.
Further, on desuperheater, near steam output end place, be provided with thermometer; Be convenient to measure the temperature in desuperheater.
Further, on desuperheater, near steam output end place, be provided with the first drain pipe with the first drain valve, described the first drain pipe is positioned at the bottom of desuperheater; Be convenient to the impurity in desuperheater and the moisture condensing to discharge from the first drain pipe.
Further, on described steam inlet pipe, the part 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, be also connected with a steam transmitting pipe being directly connected with steam turbine two ends on described steam boiler, described steam transmitting pipe is provided with defeated steam valve; Standby when desuperheater breaks down, be convenient to steam supply and do not stop.
Further, described steam transmitting pipe below is provided with the second drain pipe with the second drain valve; Be convenient to the water condensing in steam transmitting pipe to discharge by the second drain pipe.
Compared with prior art the utility model has the advantages that: in the utility model, between steam boiler and steam turbine, be provided with desuperheater, the steam cooling producing in steam boiler can be depressurized to certain parameter, and then steam stable is supplied with to shaft seal, no matter how the load of steam turbine fluctuates, it is stable that the pressure of steam supply of shaft seal can keep, and also solved the critical difficult problem exceeding standard of hot starting, hot start.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is structural representation of the present utility model.
Embodiment
Consult Fig. 1, turbine shaft seal reducing-and-cooling plant, comprise steam boiler 1, also comprise the desuperheater 2 being connected with steam boiler 1 by the steam inlet pipe 9 with 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, on described desuperheater 2, near admission end place, is connected with the water pipe 4 with water supply valve 3; 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 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.
On desuperheater 2, near steam output end place, be provided with pressure gauge 12; On desuperheater 2, near steam output end place, be provided with thermometer 13; On desuperheater 2, near steam output end place, be provided with the first drain pipe 6 with the first drain valve 5, described the 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; On described steam boiler 1, be also connected with a steam transmitting pipe 14 being 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; Described steam transmitting pipe 14 belows are provided with the second drain pipe 21 with the second drain valve 22.
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, be all adjusted to slightly larger than normal operation.
Second step: slightly drive steam valve 8 into.
The 3rd step: slightly open water supply valve 3, keep vapor (steam) temperature higher than in 20 ℃, the cylinder of steam turbine 16, pressure is controlled 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 starts start to vacuumize.
In order to prevent that the cylinder temperature of steam turbine 16 is too high before red switch, after shaft seal steam, start immediately to vacuumize; Regularly open the first drain valve 5, get rid of the water condensing in desuperheater 2.
In the utility model, between steam boiler and steam turbine, be provided with desuperheater, the steam cooling producing in steam boiler can be depressurized to certain parameter, and then steam stable is supplied with to shaft seal, no matter how the load of steam turbine fluctuates, it is stable that the pressure of steam supply of shaft seal can keep, and also solved the critical difficult problem exceeding 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, can continue steam supply by steam transmitting pipe.
The foregoing is only specific embodiment of the utility model, but technical characteristics of the present utility model is not limited to this, any those skilled in the art is in field of the present utility model, and the variation of doing or modification are all encompassed among the scope of the claims of the present utility model.
Claims (7)
1. turbine shaft seal reducing-and-cooling plant, comprise steam boiler (1), it is characterized in that: also comprise the desuperheater (2) being connected with steam boiler (1) by the steam inlet pipe with steam inlet valve (8) (9), 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) that is connected with band water supply valve (3) near admission end place of described desuperheater (2).
2. turbine shaft seal reducing-and-cooling plant according to claim 1, is characterized in that: desuperheater (2) is upper is provided with pressure gauge (12) near steam output end place.
3. turbine shaft seal reducing-and-cooling plant according to claim 1 and 2, is characterized in that: desuperheater (2) is upper is provided with thermometer (13) near steam output end place.
4. turbine shaft seal reducing-and-cooling plant according to claim 1, it is characterized in that: desuperheater (2) is upper is provided with the first drain pipe (6) with the first drain valve (5) near steam output end place, and described the first drain pipe (6) is positioned at the bottom of desuperheater (2).
5. turbine shaft seal reducing-and-cooling plant according to claim 1, is characterized in that: the part being positioned on described steam inlet pipe (9) between steam inlet valve (8) and steam boiler (1) is provided with separating valve (11).
6. turbine shaft seal reducing-and-cooling plant according to claim 1, it is characterized in that: on described steam boiler (1), be also connected with a steam transmitting pipe (14) being directly connected with steam turbine (16) two ends, described steam transmitting pipe (14) is provided with defeated steam valve (15).
7. turbine shaft seal reducing-and-cooling plant according to claim 6, is characterized in that: described steam transmitting pipe (14) below is provided with the second drain pipe (21) with the second drain valve (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320707877.5U CN203515693U (en) | 2013-11-11 | 2013-11-11 | Temperature and pressure reducing device for turbine shaft seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320707877.5U CN203515693U (en) | 2013-11-11 | 2013-11-11 | Temperature and pressure reducing device for turbine shaft seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203515693U true CN203515693U (en) | 2014-04-02 |
Family
ID=50374638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320707877.5U Expired - Fee Related CN203515693U (en) | 2013-11-11 | 2013-11-11 | Temperature and pressure reducing device for turbine shaft seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203515693U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628934A (en) * | 2013-11-11 | 2014-03-12 | 长兴新城环保有限公司 | Temperature and pressure reducing device for steam turbine shaft seal |
| CN112096464A (en) * | 2020-09-08 | 2020-12-18 | 中国长江动力集团有限公司 | Shaft seal system of small-sized steam turbine thermodynamic system |
| CN113653543A (en) * | 2021-09-24 | 2021-11-16 | 三门核电有限公司 | Method for reducing temperature of low-pressure shaft seal steam of nuclear turbine |
-
2013
- 2013-11-11 CN CN201320707877.5U patent/CN203515693U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628934A (en) * | 2013-11-11 | 2014-03-12 | 长兴新城环保有限公司 | Temperature and pressure reducing device for steam turbine shaft seal |
| CN103628934B (en) * | 2013-11-11 | 2015-07-15 | 长兴新城环保有限公司 | Temperature and pressure reducing device for steam turbine shaft seal |
| CN112096464A (en) * | 2020-09-08 | 2020-12-18 | 中国长江动力集团有限公司 | Shaft seal system of small-sized steam turbine thermodynamic system |
| CN113653543A (en) * | 2021-09-24 | 2021-11-16 | 三门核电有限公司 | Method for reducing temperature of low-pressure shaft seal steam of nuclear turbine |
| CN113653543B (en) * | 2021-09-24 | 2023-10-20 | 三门核电有限公司 | Low-pressure shaft seal steam temperature reduction method of nuclear turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20151111 |
|
| EXPY | Termination of patent right or utility model |