CN204152560U - Circulating power station Steam Turbine Driven feed-water pump - Google Patents

Circulating power station Steam Turbine Driven feed-water pump Download PDF

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Publication number
CN204152560U
CN204152560U CN201420509052.7U CN201420509052U CN204152560U CN 204152560 U CN204152560 U CN 204152560U CN 201420509052 U CN201420509052 U CN 201420509052U CN 204152560 U CN204152560 U CN 204152560U
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China
Prior art keywords
steam
turbine
water pump
small
unit
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Expired - Fee Related
Application number
CN201420509052.7U
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Chinese (zh)
Inventor
谭灿燊
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China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
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Priority to CN201420509052.7U priority Critical patent/CN204152560U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/16Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Abstract

The utility model discloses a kind of circulating power station Steam Turbine Driven feed-water pump, main steam turbine unit is used to provide steam power source, vapor recycle enters small turbine from small turbine admission piping, steam driven small turbine runs, and the exhaust heat boiler feed water pump making small turbine drive to be attached thereto runs, the steam doing merit is discharged by small steam turbine exhaust steam piping and is circulated to low pressure main steam unit, finally gets back to the acting of main steam turbine unit and reclaims heat.Run with steam driven small turbine, and drive the mode that exhaust heat boiler feed water pump runs, to the application of large capacity motor in desirable sterilizing system, greatly can reduce station service, and steam is capable of circulation through small turbine acting, reach the object recycled, energy-saving effect is obvious.

Description

Circulating power station Steam Turbine Driven feed-water pump
Technical field
The utility model belongs to power plant system technical field, particularly relates to a kind of circulating power station Steam Turbine Driven feed-water pump.
Background technique
Circulating power station is generally gas combustion-gas vapor combined cycle factory, with rock gas, coal gas or biogas etc. for fuel, the weary flue gas of high temperature of discharging after gas turbine acting is reclaimed by exhaust heat boiler and is converted to steam, feeding steam turbine generates electricity, or the exhaust steam after being done work by part generate electricity is used for heat supply.
Exhaust heat boiler feed water pump adopts motoring usually, and the part of the normally most power consumption of circulating power station, the air horsepower of a 390MW level Combined Cycle Unit high pressure water pump is about 1500MW, and the station service power consumption rate that high pressure water pump consumes is about 0.3%; As year hours of operation calculates according to 5000h, then need power consumption 7,500,000 degree electricity every year.
Very large with the power consumption of motoring exhaust heat boiler feed water pump, cause the waste of the energy.
Model utility content
Based on this, the utility model is to overcome the defect that prior art power consumption is large, waste energy, and provides a kind of circulating power station Steam Turbine Driven feed-water pump.
A kind of circulating power station Steam Turbine Driven feed-water pump, its circulating power station comprises main steam turbine unit and low pressure main steam unit, comprises small turbine unit and exhaust heat boiler feed water pump; Described small turbine unit comprises small turbine, small turbine admission piping and small steam turbine exhaust steam piping, the admission piping of described small turbine connects described main steam turbine unit and accepts the steam source from described main steam turbine unit, described small turbine connects and drives described exhaust heat boiler feed water pump, and described small steam turbine exhaust steam piping connects described low pressure main steam unit.
Wherein in an embodiment, the steam source of the admission piping of small turbine from main steam turbine unit high-pressure cylinder steam discharge or height (in) cylinder pressure draws gas.
Wherein in an embodiment, described low pressure main steam unit at least comprise low-pressure drum and low press through (again) hot device one of them; Described small steam turbine exhaust steam piping at least connect the steam line of described low-pressure drum outlet and the described low steam line pressing through the outlet of (again) hot device one of them.
Wherein in an embodiment, described small turbine is back pressure type small turbine.
Wherein in an embodiment, described exhaust heat boiler feed water pump is connected with adopting gearbox between small turbine.
Above-mentioned circulating power station Steam Turbine Driven feed-water pump, main steam turbine unit is used to provide steam power source, vapor recycle enters small turbine from small turbine admission piping, steam driven small turbine runs, and the exhaust heat boiler feed water pump making small turbine drive to be attached thereto runs, the steam doing merit is discharged by small steam turbine exhaust steam piping and is circulated to low pressure main steam unit, finally gets back to the acting of main steam turbine unit and reclaims heat.Run with steam driven small turbine, and drive the mode that exhaust heat boiler feed water pump runs, to the application of large capacity motor in desirable sterilizing system, greatly can reduce station service, and steam is capable of circulation through small turbine acting, reach the object recycled, energy-saving effect is obvious.
Accompanying drawing explanation
Fig. 1 is the structural representation of circulating power station Steam Turbine Driven feed-water pump described in the utility model.
Description of reference numerals:
100. circulating power stations Steam Turbine Driven feed-water pump, 110. small turbine unit, 112. small turbine, 114. small turbine admission pipings, 1141. high-pressure cylinder steam discharges, 1142. height (in) cylinder pressure draws gas, 116. small steam turbine exhaust steam pipings, 118. gearbox, 120. exhaust heat boiler feed water pumps, 200. main steam turbine unit, 210. height (in) cylinder pressure, 220. low pressure (LP) cylinder, 230. condensate pumps, 300. low pressure main steam unit, 310. low-pressure drums, 320. lowly press through (again) hot device, 400. exhaust heat boiler unit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, a kind of circulating power station Steam Turbine Driven feed-water pump 100, its circulating power station comprises main steam turbine unit 200 and low pressure main steam unit 300, comprises small turbine unit 110 and exhaust heat boiler feed water pump 120; Small turbine unit 110 comprises small turbine 112, small turbine admission piping 114 and small steam turbine exhaust steam piping 116, the admission piping of small turbine 112 connects main steam turbine unit 200 and accepts the steam source from main steam turbine unit 200, small turbine 112 connects and drives exhaust heat boiler feed water pump 120, and small steam turbine exhaust steam piping 116 connects low pressure main steam unit 300.
Above-mentioned circulating power station Steam Turbine Driven feed-water pump 100, main steam turbine unit 200 is used to provide steam power source, vapor recycle enters small turbine 112 from small turbine admission piping 114, steam driven small turbine 112 runs, and make small turbine 112 drive the exhaust heat boiler feed water pump 120 be attached thereto to run, the steam doing merit is discharged by small steam turbine exhaust steam piping 116 and is circulated to low pressure main steam unit 300, finally gets back to main steam turbine unit 200 acting and reclaims heat.Run with steam driven small turbine 112, and drive the mode that exhaust heat boiler feed water pump 120 runs, to the application of large capacity motor in desirable sterilizing system, greatly can reduce station service, and steam is capable of circulation does work through small turbine 112, reach the object recycled, energy-saving effect is obvious.
Wherein, main steam turbine unit 200 comprise height (in) cylinder pressure 210 and low pressure (LP) cylinder 220, the steam source that main steam turbine unit 200 provides comprise at least high-pressure cylinder steam discharge 1141 and high (in) cylinder pressure draw gas 1142 one of them.Further, for the Combined Cycle Unit comprising middle pressure main steam system, high (in) cylinder pressure draws gas and 1142 also comprise middle pressure main steam vapour source.
Further, low pressure main steam unit 300 at least comprise low-pressure drum 310 and low press through (again) hot device 320 one of them; Small steam turbine exhaust steam piping 116 at least connect steam line that low-pressure drum 310 exports and low press through steam line that (again) hot device 320 exports one of them.The steam of discharging through small steam turbine exhaust steam piping 116 directly can be expelled to the low steam line pressing through (again) hot device 320 outlet end, and finally enters main steam turbine unit 200; Also can be, after the steam of discharging through small steam turbine exhaust steam piping 116 is expelled to the steam line of low-pressure drum 310 outlet end, be expelled to main steam turbine unit 200 through low pressing through after (again) hot device 320 heats again.
Further, small turbine 112 is back pressure type small turbine, and the heat overwhelming majority contained by the steam discharge of back pressure type small turbine 112 is utilized by main steam turbine unit 200, there is not cold source energy, so the thermal efficiency is higher.
Further, gearbox 118 is adopted to be connected between exhaust heat boiler feed water pump 120 with small turbine 112; Adopt small turbine 112 speed governing to regulate the rotating speed of exhaust heat boiler feed water pump 120, improve the efficiency of exhaust heat boiler feed water pump 120.
In circulating power station, the air horsepower of a 390MW level Combined Cycle Unit high pressure water pump is about 1500MW, and the station service power consumption rate that high pressure water pump consumes is about 0.3%; As year hours of operation calculates according to 5000h, then need power consumption 7,500,000 degree electricity every year; And employing provides small turbine 112 to drive the mode of exhaust heat boiler feed water pump 120 to substitute motor with electrical energy drive exhaust heat boiler feed water pump 120 with steam, reduce station service, saved the energy.
The utility model circulating power station Steam Turbine Driven feed-water pump 100 is runnings like this:
Steam/water circulating is formed by main steam turbine unit 200, exhaust heat boiler unit 400 and circulating power station Steam Turbine Driven feed-water pump 100, wherein main steam turbine unit 200 forms steam source, steam source access circulating power station Steam Turbine Driven feed-water pump 100, wherein the steam discharge of circulating power station Steam Turbine Driven feed-water pump 100 drains into low pressure main steam unit 300, and finally reclaims heat through main steam turbine low pressure (LP) cylinder 220 acting.
The above embodiment only have expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims (5)

1. a circulating power station Steam Turbine Driven feed-water pump, its circulating power station comprises main steam turbine unit and low pressure main steam unit, it is characterized in that, comprises small turbine unit and exhaust heat boiler feed water pump; Described small turbine unit comprises small turbine, small turbine admission piping and small steam turbine exhaust steam piping, the admission piping of described small turbine connects described main steam turbine unit and accepts the steam source from described main steam turbine unit, described small turbine connects and drives described exhaust heat boiler feed water pump, and described small steam turbine exhaust steam piping connects described low pressure main steam unit.
2. circulating power station Steam Turbine Driven feed-water pump according to claim 1, the steam source of the admission piping of described small turbine from main steam turbine unit high-pressure cylinder steam discharge, high-pressure cylinder draws gas or intermediate pressure cylinder draws gas.
3. circulating power station Steam Turbine Driven feed-water pump according to claim 1, is characterized in that, described low pressure main steam unit at least comprises one of them of low-pressure drum, low-pressure superheater and low pressure reheater; Described small steam turbine exhaust steam piping at least connects the steam line of described low-pressure drum outlet, the steam line of described low-pressure superheater outlet and one of them of steam line of described low pressure reheater outlet.
4. circulating power station Steam Turbine Driven feed-water pump according to claim 1, is characterized in that, described small turbine is back pressure type small turbine.
5. circulating power station Steam Turbine Driven feed-water pump according to claim 1, is characterized in that, described exhaust heat boiler feed water pump is connected with adopting gearbox between small turbine.
CN201420509052.7U 2014-09-04 2014-09-04 Circulating power station Steam Turbine Driven feed-water pump Expired - Fee Related CN204152560U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420509052.7U CN204152560U (en) 2014-09-04 2014-09-04 Circulating power station Steam Turbine Driven feed-water pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420509052.7U CN204152560U (en) 2014-09-04 2014-09-04 Circulating power station Steam Turbine Driven feed-water pump

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CN204152560U true CN204152560U (en) 2015-02-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105157763A (en) * 2015-09-17 2015-12-16 中国能源建设集团广东省电力设计研究院有限公司 Measurement method and measurement system for main steam flow of gas-steam combined cycle power plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105157763A (en) * 2015-09-17 2015-12-16 中国能源建设集团广东省电力设计研究院有限公司 Measurement method and measurement system for main steam flow of gas-steam combined cycle power plant

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C56 Change in the name or address of the patentee

Owner name: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC

Free format text: FORMER NAME: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE

CP01 Change in the name or title of a patent holder

Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No.

Patentee after: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE Co.,Ltd.

Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No.

Patentee before: GUANGDONG ELECTRIC POWER DESIGN INSTITUTE OF CHINA ENERGY ENGINEERING GROUP Co.,Ltd.

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150211

Termination date: 20210904

CF01 Termination of patent right due to non-payment of annual fee