CN203685306U - Water supply system for steam turbine generator unit of back pressure type - Google Patents
Water supply system for steam turbine generator unit of back pressure type Download PDFInfo
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- CN203685306U CN203685306U CN201320885748.5U CN201320885748U CN203685306U CN 203685306 U CN203685306 U CN 203685306U CN 201320885748 U CN201320885748 U CN 201320885748U CN 203685306 U CN203685306 U CN 203685306U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 230000009471 action Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 238000010248 power generation Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000006837 decompression Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model discloses a water supply system for a steam turbine generator unit of a back pressure type, and is applied to the technical field of thermal power generation. The system comprises a main steam turbine of a back pressure type, a deaerator, and a water-feeding pump, wherein the main steam turbine, the deaerator and the water-feeding pump are sequentially connected together. A small steam turbine of a back pressure type is disposed between the main steam turbine and the deaerator, wherein the small steam turbine is used for driving the water-feeding pump to work. An exhaust steam pipe of the main steam turbine is connected with a steam inlet pipe of the small steam turbine through a first connecting pipe. An exhaust steam pipe of the small steam turbine is connected with a steam inlet pipe of the deaerator through a third connecting pipe. The system provided by the utility model employs the small steam turbine for replacing a motor-driving water supply pump, can reduce the internal consumption of a power plant, reduces the throttling loss of steam heating of the deaerator, and improves the thermal efficiency of a unit.
Description
Technical field
The utility model relates to thermal power generating technology field, specifically the water supply system in a kind of thermal power generation unit.
Background technique
Back pressure type steam turbine generator set, as the main force's type for industrial steam, has obvious economic benefit, environmental benefit and social benefit, belongs to the project of national encourage growth.Along with the fast development of China's industry, industrial heat load demand sharp increase and present the trend improving constantly by vapour parameter.This kind of reality caused heavy duty boiler in Unit Selection to join the appearance of high parameter, high back pressure, the little steam turbine generator installation scheme of exerting oneself, and causes thus the unit generation amount to reduce, and even can not meet the phenomenon of in-plant equipment need for electricity.
At present, domesticly go into operation and be 75MW grade at the back pressure type steam turbine generator set maximum capacity of building, to transform and form on 100MW unit, its water supply system all adopts electrically driven feedpump pattern, electrically driven feedpump modular system is simple, but power consumption is huge, in full factory current consuming apparatus, occupy leading position.Therefore, the power consumption of rationally reduction or elimination feed water pump becomes the matter of utmost importance that ensures factory steam, reduces power plant's operating cost.
For the back pressure unit of high parameter, the steam parameter that in heat regenerative system, heating steam parameter generally needs higher than equipment, needs in actual motion using after heating steam decompression.Oxygen-eliminating device operated by rotary motion atmospheric type deaerator in back pressure unit, required vapor pressure is far below the exhaust steam pressure of back pressure type main steam turbine, therefore oxygen-eliminating device heating need to arrange with vapour, modulating valve decompression is rear to be used, thereby causes restriction loss, reduces generatine set heat efficiency.
Model utility content
The utility model technical issues that need to address are to provide a kind of back pressure type steam turbine generator set water supply system, can meet on the basis of normal feedwater, reduce feed water pump power consumption and restriction loss, improve generatine set heat efficiency.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is:
Back pressure type steam turbine generator set water supply system, comprises the back pressure type main steam turbine, oxygen-eliminating device and the feed water pump that connect successively, is provided with the back pressure type small turbine for driving feed water pump action between described back pressure type main steam turbine and oxygen-eliminating device; The blow-off line of back pressure type main steam turbine is connected with the admission pipeline of back pressure type small turbine by the first connecting tube, and the blow-off line of back pressure type small turbine is connected with the admission pipeline of oxygen-eliminating device by the second connecting tube.
Further improvement of the utility model is: the exhaust steam pipe of back pressure type main steam turbine is also connected with the admission pipeline of oxygen-eliminating device by the 3rd connecting tube, on the 3rd connecting tube, is provided with the pneumatic control valve for steam regulation flow and pressure.
Owing to having adopted technique scheme, the technological progress that the utility model is obtained is:
The utility model can be saved feed water pump power consumption, rationally utilizes oxygen-eliminating device heating vapour restriction loss, improves generatine set heat efficiency.Between described back pressure type main steam turbine and feed water pump, be provided with the back pressure type small turbine for driving feed water pump, saved the power consumption that motor drives feed water pump to produce, reduced power plant's operating cost, improve economy of power plant benefit; Described oxygen-eliminating device heating is back pressure type small turbine steam discharge with vapour, has rationally utilized the restriction loss of oxygen-eliminating device heating vapour, improves generatine set heat efficiency.
The exhaust steam pipe of described back pressure type main steam turbine is also connected with the admission pipeline of oxygen-eliminating device by the 3rd connecting tube, in the time that oxygen-eliminating device heating steam consumption is not enough, can be supplemented by the steam discharge of back pressure type main steam turbine, and regulate admission flow by the pneumatic control valve being arranged on the 3rd pipeline, ensure security of system stable operation.
Brief description of the drawings
Fig. 1 is process flow diagram of the present utility model.
Wherein, 1, back pressure type main steam turbine, 2, back pressure type small turbine, 3, oxygen-eliminating device, 4, feed water pump, 5, boiler.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details:
Back pressure type steam turbine generator set water supply system, its technological process as shown in Figure 1, comprises the back pressure type main steam turbine 1, oxygen-eliminating device 3 and the feed water pump 4 that connect successively, wherein between back pressure type main steam turbine 1 and oxygen-eliminating device 3, is also provided with back pressure type small turbine 2.The blow-off line of back pressure type main steam turbine 1 is connected with the admission pipeline of back pressure type small turbine 2 by the first connecting tube, and the blow-off line of back pressure type small turbine 2 is connected with the admission pipeline of oxygen-eliminating device 3 by the second connecting tube; Back pressure type small turbine 2 is coaxially connected with feed water pump 4, drives feed water pump 4 to improve feed pressure by back pressure type small turbine 2.The blow-off line of back pressure type main steam turbine 1 is also connected with the admission pipeline of oxygen-eliminating device 3 by the 3rd connecting tube, on the 3rd connecting tube, pneumatic control valve is set, for controlling the steam flow that enters oxygen-eliminating device 3 from back pressure type main steam turbine 1.
The working procedure of back pressure type steam turbine generator set is as described below:
The high temperature and high pressure steam red switch back pressure type main steam turbine 1 being produced by boiler 5 generates electricity, the steam discharge of back pressure type main steam turbine 1 enters back pressure type small turbine 2 by the first connecting tube, drive back pressure type small turbine 2, then drive and the coaxial feed water pump being connected 4 of back pressure type small turbine 2, take full advantage of the high parameter steam discharge of back pressure type main steam turbine 1, saved the electric weight that motoring feed water pump 4 consumes; Heat the low parameter steam discharge of back pressure type small turbine 2 as oxygen-eliminating device 3 with vapour, introduce oxygen-eliminating device 3 by the second connecting tube, avoid the high parameter steam discharge of back pressure type main steam turbine 1 to reduce pressure and enter the restriction loss that oxygen-eliminating device 3 produces by modulating valve, improved economy of power plant.
In the time that oxygen-eliminating device 3 heating are not enough with vapour, high parameter steam discharge by back pressure type main steam turbine 1 supplements, high parameter steam discharge enters oxygen-eliminating device 3 by the 3rd connecting tube after decompression, cause the phenomenon of oxygen-eliminating device 3 heating vapour deficiencies for compensating the steam flow fluctuation causing because of the fluctuation of load of back pressure type small turbine 2, and by being arranged on the pneumatic control valve control steam flow on the 3rd connecting tube, ensure security of system stable operation.
Claims (2)
1. back pressure type steam turbine generator set water supply system, comprise the back pressure type main steam turbine (1), oxygen-eliminating device (3) and the feed water pump (4) that connect successively, it is characterized in that: between described back pressure type main steam turbine (1) and oxygen-eliminating device (3), be provided with the back pressure type small turbine (2) for driving feed water pump (4) action; The blow-off line of back pressure type main steam turbine (1) is connected with the admission pipeline of back pressure type small turbine (2) by the first connecting tube, and the blow-off line of back pressure type small turbine (2) is connected with the admission pipeline of oxygen-eliminating device (3) by the second connecting tube.
2. back pressure type steam turbine generator set water supply system according to claim 1, it is characterized in that: the exhaust steam pipe of back pressure type main steam turbine (1) is also connected with the admission pipeline of oxygen-eliminating device (3) by the 3rd connecting tube, on the 3rd connecting tube, is provided with the pneumatic control valve for steam regulation flow and pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320885748.5U CN203685306U (en) | 2013-12-31 | 2013-12-31 | Water supply system for steam turbine generator unit of back pressure type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320885748.5U CN203685306U (en) | 2013-12-31 | 2013-12-31 | Water supply system for steam turbine generator unit of back pressure type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203685306U true CN203685306U (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320885748.5U Expired - Lifetime CN203685306U (en) | 2013-12-31 | 2013-12-31 | Water supply system for steam turbine generator unit of back pressure type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203685306U (en) |
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2013
- 2013-12-31 CN CN201320885748.5U patent/CN203685306U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province Patentee after: POWERCHINA HEBEI ELECTRIC POWER ENGINEERING Co.,Ltd. Address before: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province Patentee before: HEBEI ELECTRIC POWER DESIGN & Research Institute |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |