CN201851183U - Back heating type steam-driven forced draught blower system for power plant and thermal circulation system for power plant - Google Patents
Back heating type steam-driven forced draught blower system for power plant and thermal circulation system for power plant Download PDFInfo
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- CN201851183U CN201851183U CN2010201817820U CN201020181782U CN201851183U CN 201851183 U CN201851183 U CN 201851183U CN 2010201817820 U CN2010201817820 U CN 2010201817820U CN 201020181782 U CN201020181782 U CN 201020181782U CN 201851183 U CN201851183 U CN 201851183U
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Abstract
The utility model relates to a back heating type steam-driven forced draught blower system for a power plant, which comprises a small steam turbine unit; and the small steam turbine unit comprises a small steam turbine, a steam inlet pipe system of the small steam turbine and a steam discharge pipe system of the small steam turbine. The back heating type steam-driven forced draught blower system further comprises a forced draught blower driven by the small steam turbine, adopts the small steam turbine to drive the forced draught blower and simultaneously discharges the exhaust steam of the small steam turbine into back heating equipment, thereby recovering the heat of the exhaust steam to a thermal circulation system for the power plant. The back heating type steam-driven forced draught blower system has the advantages that the back heating type steam-driven forced draught blower system for the power plant can select steam with various steam sources to drive the small steam turbine to rotate, then adopts the small steam turbine to drive the forced draught blower and selectively accesses the exhaust steam into various back heating equipments, so as to heat feed water or condensed water by utilizing the steam that does work in the steam turbine, reduce the cold source loss of steam heat and transfer the heat to the feed water or the condensed water, thereby improving the thermal circulation efficiency. In the application of replacing an electromotor with the power plant, the back heating type steam-driven forced draught blower system can reduce the power consumption of the power plant and improve the power supply efficiency of a forced draught blower unit. The back heating type steam-driven forced draught blower system also discloses the thermal circulation system for the power plant.
Description
Technical field
The utility model relates to power plant system, particularly a kind of power station regenerative heat type steam-operating blower system.
Background technique
At present the power supply demand of China is growing, and electric motor power is fast rise year by year thereupon also, significantly improving unit parameter with when improving generating efficiency, how to improve power consumption efficiency, promptly reduces station service power consumption rate and more and more is much accounted of.
The mode that significantly reduces at present station service power consumption rate mainly is with the main equipment of power station, is typically boiler fan, is changed into by small turbine by motoring driving, and can cancel jumbo motor like this, to reach the purpose that significantly reduces station service.
Prior art employing small turbine driving blower system (hereinafter to be referred as: prior art) as shown in Figures 1 and 2, wherein the small turbine steam discharge of Fig. 1 enters the main frame vapour condenser, circulating water condensation by the main frame vapour condenser is a water of condensation, and the small turbine steam discharge of Fig. 2 enters the independent vapour condenser of small turbine, is water of condensation by the circulating water condensation of small turbine vapour condenser.But no matter be Fig. 1 or system shown in Figure 2, small turbine all is a condensed steam type, all be steam discharge to be condensed into water of condensation by circulating water (low-temperature receiver), so only can reclaim the working medium of steam discharge, but the heat of steam discharge (it is over half that this heat accounts for the heat of vapour source steam) will be drained along with circulating water, thereby make whole circulation efficient not high.
And, drive in the gas fan technology at above-mentioned traditional condensed steam type small turbine, because the efficient of small turbine is more much lower than main steam turbine, thereby after causing gas fan changed into small turbine and driven by motor, only can play the purpose that reduces station service, the power supply efficiency of whole generating factory is to have reduced on the contrary.
Therefore, related domain presses for a kind of employing small turbine and drives gas fan, both can reach the purpose that reduces station service, and the while can be recovered to exhaust steam heat in the thermodynamic cycle, thereby has significantly improved the system of unit power supply efficiency.
The model utility content
First purpose of the present utility model is to provide a kind of employing small turbine to drive gas fan, both can reduce the purpose of station service, while can be recovered to exhaust steam heat in the thermodynamic cycle again, thereby has significantly improved the power station regenerative heat type steam-operating blower system of unit power supply efficiency.
Second purpose of the present utility model is to provide a kind of employing small turbine to drive gas fan, both can reduce the purpose of station service, while can be recovered to exhaust steam heat in the thermodynamic cycle again, thereby has significantly improved the power station circulation system of unit power supply efficiency.
First aspect of the present utility model provides a kind of power station regenerative heat type steam-operating blower system (100), adopt small turbine (11) to drive by gas fan (2), simultaneously with the heat? recovery of small turbine (11) steam discharge to power station circulation system (300), it comprises:
-regenerative heat type small turbine unit (1); Described regenerative heat type small turbine unit (1) comprising:
-small turbine (11);
-be located at the small turbine admission piping (12) of described small turbine (11) upstream, wherein, described small turbine admission piping (12) is accepted the steam source (34) from power station circulation system (300); And
-be located at the small turbine exhaust steam pipeline (13) in described small turbine (11) downstream; The steam discharge of described small turbine exhaust steam pipeline (13) enters the backheat unit (32) of described power station circulation system (300);
-and by the gas fan (2) of described small turbine unit (1) driving.
In a preference, described gas fan is a boiler fan.
In an embodiment of the present utility model, described driven equipment (2) is selected from by boiler fan and desulfurization booster fan and merges the gas fan that forms.
Provide a kind of power station circulation system (300) in second aspect of the present utility model, it comprises the circulation that boiler unit (33), main steam turbine unit (30), vapour condenser unit (31) and backheat unit (32) are constituted, wherein said main steam turbine unit (30) and/or described boiler unit (33) provide steam source (34), also comprise:
-power station regenerative heat type steam-operating blower system as claimed in claim 1 (100), wherein said steam source (34) provides driving steam for small turbine (11);
-backheat unit (32), the steam discharge of wherein said power station regenerative heat type small turbine system (100) enters described backheat unit (32); And the heat? recovery of described backheat unit (32) is to described boiler unit (33).
In an embodiment of the present utility model, described main steam turbine unit (30) is made up of high-pressure cylinder (301), intermediate pressure cylinder (302), low pressure (LP) cylinder (303) in regular turn;
Wherein,
The admission of described high-pressure cylinder (301) is main steam (341); Steam discharge is hot cold section steam (342) again;
The admission of described intermediate pressure cylinder (302) is hot arc steam (343) again; Steam discharge is intermediate pressure cylinder steam discharge (344).
In an embodiment of the present utility model, the steam source (34) that enters described power station regenerative heat type small turbine system (100) is selected from one or more in the following vapour source:
Main steam (341); Hot colder section steam (342), hot arc steam (343), intermediate pressure cylinder steam discharge (344), main steam turbine draw gas again, the intermediate steam of boiler unit, auxiliary steam, other have the steam of the degree of superheat.
In an embodiment, described main steam turbine draws gas and is meant, certain level of the high, medium and low cylinder pressure of main steam turbine is drawn gas.
In an embodiment, the intermediate steam of described boiler unit is meant: the intermediate steam of boiler superheater or reheater.
Advantage of the present utility model is:
The utility model provides a kind of power station regenerative heat type steam-operating blower system, can utilize steam heating feedwater or the water of condensation of making merit in the steam turbine, reduce the cold source energy of steam heat, this heat is passed to feedwater or water of condensation, thereby improve efficiency of thermal cycle.
Can be as required, the steam source of the small turbine of power station regenerative heat type small turbine system and steam discharge backheat unit are selected flexibly and reached necessary requirement.
Description of drawings
Fig. 1 is that the auxiliary small turbine of the condensing power station of prior art drives blower system, and small turbine steam discharge wherein enters the main frame vapour condenser;
Fig. 2 is that the auxiliary small turbine of the condensing power station of prior art drives blower system, and small turbine steam discharge wherein enters independent vapour condenser;
Fig. 3 is condensing power station's regenerative heat type steam-operating blower system of the present utility model (100) and the heat regenerative system (200) that is used for described small turbine (11) and the power station circulation system (300) that contains said system.
Embodiment
The utility model designer is through extensive and deep research, by changing technological process, problem at the prior art existence, the invention provides a kind of power station regenerative heat type steam-operating blower system, this system is the part of power station circulation system, wherein steam source is after the running of small turbine acting driving arrangement, and the heat of steam discharge and working medium are recovered in the power station circulation system by backheat equipment.Power station of the present invention regenerative heat type small turbine system has the steam discharge of minimizing cold source energy, improves the effect of unit efficiency.Finished the utility model on this basis.
Herein, described " power station " comprising: industry power plants for self-supply such as thermal power plant, nuclear power plant, biomass power generation factory, gas turbine power plant, steel chemical papermaking, but be not limited to this.Comprise that also other needs small turbine to drive the system of gas fan.
Herein, described " backheat " is meant and utilizes steam heating feedwater or the water of condensation of making merit in the steam turbine, reduce the cold source energy of steam heat, this heat passed to feedwater or water of condensation, thereby improve efficiency of thermal cycle.
Other aspects of the present utility model are because the disclosure of this paper is conspicuous to those skilled in the art.
Steam source
In the power station circulation system, can produce steam source in many places.Usually, the power station circulation system comprises the circulation that boiler unit, main steam turbine unit, vapour condenser unit and backheat unit are constituted, wherein said main steam turbine unit, described boiler unit form steam source, and perhaps two unit form steam source simultaneously.
Steam source of the present utility model can be one or more in the following vapour source:
1) main steam (being the high-pressure cylinder admission of main steam turbine);
2) hot colder section steam (being the high-pressure cylinder steam discharge of main steam turbine);
3) hot arc steam (being the intermediate pressure cylinder admission of main steam turbine) again;
4) the intermediate pressure cylinder steam discharge of main steam turbine;
5) the high, medium and low cylinder pressure level of main steam turbine is drawn gas;
6) intermediate steam of boiler superheater or reheater;
7) auxiliary steam;
8) other have the steam of certain degree of superheat.
Described steam source can adopt above a kind of vapour source, also can merge.Preferably, adopt 1) hot colder section steam (being the high-pressure cylinder steam discharge of main steam turbine); 2) auxiliary steam; 3) intermediate steam of boiler superheater or reheater; A kind of or combination among the three.
Described steam source is running like this: by small turbine admission piping steam is connected to small turbine; Steam does work in small turbine, drives the driven equipment running by small turbine; Steam discharge after the acting enters steam discharge backheat unit by the small turbine exhaust steam pipeline, and the heat of steam discharge and working medium are recovered in the thermodynamic cycle.
Regenerative heat type small turbine unit and be driven gas fan
Described regenerative heat type small turbine unit comprises: small turbine; Be located at the small turbine admission piping of described small turbine upstream, wherein, described small turbine admission piping is accepted the steam source from the power station circulation system; And the small turbine exhaust steam pipeline that is located at described small turbine downstream; The steam discharge of described small turbine exhaust steam pipeline enters the backheat unit of described power station circulation system.
In the regenerative heat type small turbine unit, the small turbine of employing does not have specific (special) requirements, only otherwise goal of the invention of the present utility model is produced restriction to get final product.Described " small turbine " is the conventional term of related domain, is generally for main steam turbine.Usually, the power station main steam turbine is used to drive generator for electricity generation, and small turbine is used to drive the subsidiary engine equipment operation.Those skilled in the art are according to normal condition, or select small turbine according to the condition that manufacturer advises.
The gas fan that is driven by small turbine can be a boiler fan, also can be the gas fan that boiler fan and desulfurization booster fan merge.
In the regenerative heat type small turbine unit, steam discharge backheat unit can be one or more in the following equipment in the regenerative heat type small turbine unit:
1) deaerating heater;
2) low-pressure heater;
3) high-pressure heater;
4) other backheat equipment.
It is running like this that backheat small turbine of the present utility model drives blower system: the key point of regenerative heat type small turbine system of the present invention is that small turbine adopts the backheat principle, after the steam process small turbine work done of steam source, the steam discharge of small turbine is guided to heating heating power circuit working medium (as: feedwater or water of condensation) in the steam discharge backheat unit, power station (as: deaerating heater or high and low pressure heater), to reclaim heat and working medium, improve cycle efficiency greatly.Adopt the condensed steam type system with the small turbine of the driving blower-use of prior art, enter vapour condenser, only reclaim working medium and do not reclaim the heat difference.
Below in conjunction with specific embodiment, further illustrate the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Canonical system described in this specification is a kind of preferable specific embodiment of the present invention.All technician in the art all should be in claim protection domain of the present invention under this invention's idea on the basis of existing technology by the available technological scheme of logical analysis, reasoning, or a limited experiment.
Unless otherwise defined or explanation, the meaning that all specialties used herein are familiar with scientific words and those skilled in the art is identical.Any in addition equipment similar or impartial to described content all can be applicable in the utility model.
Embodiment
As shown in Figure 3, show an embodiment of power station of the present utility model regenerative heat type small turbine system.Only connected typical vapour source and backheat equipment among the figure, and not shown all possibilities, so Fig. 3 only is not to restriction of the present utility model with explaining.
Fig. 3 shows a kind of power station of the present utility model regenerative heat type steam-operating blower system 100, is used for heat? recovery with small turbine 11 steam discharges to power station circulation system 300, and it comprises: regenerative heat type small turbine unit 1; Described regenerative heat type small turbine unit 1 comprises: small turbine 11; Be located at the small turbine admission piping 12 of described small turbine 11 upstreams, wherein, the steam source 34 that described small turbine admission piping 12 is accepted from power station circulation system 300; And the small turbine exhaust steam pipeline 13 that is located at described small turbine 11 downstreams; The steam discharge of described small turbine exhaust steam pipeline 13 enters the backheat unit 32 of described power station circulation system 300; With by the steam-powered gas fan 2 of described small turbine 1.
Wherein, the described gas fan 2 that is driven can be a boiler fan, also can be the gas fan that boiler fan and desulfurization booster fan merge.
Fig. 3 also shows the heat regenerative system 200 that is used for described small turbine 11, and small turbine 11 steam discharges are entered backheat unit 32, with the heat? recovery of steam discharge in power station circulation system 300.
Described backheat unit 32 is selected from one or more in the following equipment: deaerating heater 322, low-pressure heater 321, high-pressure heater 323 or other backheat equipment.
Fig. 3 also shows a kind of power station circulation system 300, it comprises the circulation that boiler unit 33, main steam turbine unit 30, vapour condenser unit 31 and backheat unit 32 are constituted, the steam source 34 that wherein said main steam turbine unit 30 and/or described boiler unit 33 provide, also comprise power station regenerative heat type steam-operating blower system 100, the steam of wherein said steam source 34 inserts described power station regenerative heat type steam-operating blower system 100; And steam discharge backheat unit 32, and the heat? recovery of described backheat unit 32 is to described boiler unit 33.
Described main steam turbine unit 30 is made up of high-pressure cylinder 301, intermediate pressure cylinder 302, low pressure (LP) cylinder 303 in regular turn; The admission of described high-pressure cylinder 301 is a main steam 341; Steam discharge is hot cold section steam 342 again; The admission of described intermediate pressure cylinder 302 is hot arc steam 343 again; Steam discharge is an intermediate pressure cylinder steam discharge 344.
The steam source 34 that inserts the auxiliary steam-operating blower system 100 in described power station is selected from one or more in the following vapour source: main steam 341; Hot colder section steam 342, hot arc steam 343, intermediate pressure cylinder steam discharge 344, main steam turbine draw gas again, the intermediate steam (intermediate steam of boiler superheater or reheater) of boiler unit, auxiliary steam, other have the steam of the degree of superheat.
Described steam discharge backheat unit 32 is selected from one or more in the following equipment: deaerating heater 322, low-pressure heater 321, high-pressure heater 323 or other backheat equipment.
System of the present utility model is running like this:
Form the vapor recycle pipeline by boiler unit 33, main steam turbine unit 30, power station regenerative heat type steam-operating blower system 100 and backheat unit 32;
Wherein: described main steam turbine unit 30 and/or boiler unit 33 carry out steam discharge and form steam source 34, and the steam of described steam source 34 inserts described power station regenerative heat type steam-operating blower system 100; The steam discharge of wherein said power station regenerative heat type steam-operating blower system 100 enters described backheat unit 32; And the heat? recovery of described backheat unit 32 is to described boiler unit 33.
Adopting as above, step reaches the purpose that reclaims small turbine exhaust steam heat and working medium.
The utility model has reached following effect:
One, back-heating type steam-operating blower system drive blower system with existing condensing-type small turbine and compare, and cycle efficieny improves greatly. Take a coal-fired thermal power generation unit of typical 1000MW as example, change the back-heating type small turbine system such as the small turbine that will drive pressure fan into by condensing-type, move per year estimation in 5500 hours, can save coal-fired about 3000 tons every year, by coal-fired 600 yuan of calculating per ton, then benefit of saving coal is 1,800,000/year.
Two, back-heating type steam-operating blower system is compared with the Motor Drive blower system of routine, and station service power consumption rate descends greatly. Take a coal-fired thermal power generation unit of typical 1000MW as example, change the back-heating type small turbine system such as the type of drive with pressure fan into by motor, then station service power consumption rate descends about 0.6%, move per year estimation in 5500 hours, can save coal-fired about 6000 tons every year, by coal-fired 600 yuan of calculating per ton, then benefit of saving coal is 3,600,000/year.
Three, after the employing back-heating type steam-operating blower system, under the prerequisite of guaranteed efficiency, the driving device of pressure fan no longer is subjected to limiting voltage. Such as the common 6kV electric pressure in power plant, be subjected to the restriction of starting current, also need increase such as power, then need adopt the electric pressure of 10kV, this will increase the complexity of construction investment and system greatly. Back-heating type steam-operating blower system does not then have the restriction of this respect.
In a word, from above-mentioned multi-angle, the present invention compared with prior art has significant economic benefit and huge potential social effect, especially meets the current needs that create conservation-minded society.
All quote in this application as a reference at all documents that the utility model is mentioned, just as each piece document is quoted separately as a reference. Should be understood that in addition after having read foregoing of the present utility model, those skilled in the art can make various changes or modifications the utility model, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (5)
1. a power station regenerative heat type steam-operating blower system (100) adopts small turbine (11) to drive by gas fan (2), simultaneously with the heat? recovery of small turbine (11) steam discharge to power station circulation system (300), it is characterized in that it comprises:
-regenerative heat type small turbine unit (1); Described regenerative heat type small turbine unit (1) comprising:
-small turbine (11);
-be located at the small turbine admission piping (12) of described small turbine (11) upstream, wherein, described small turbine admission piping (12) is accepted the steam source (34) from power station circulation system (300); And
-be located at the small turbine exhaust steam pipeline (13) in described small turbine (11) downstream; The steam discharge of described small turbine exhaust steam pipeline (13) enters the backheat unit (32) of described power station circulation system (300);
-and by the gas fan (2) of described small turbine unit (1) driving.
2. the system as claimed in claim 1 is characterized in that, described gas fan (2) is selected from by boiler fan and desulfurization booster fan and merges the gas fan that forms.
3. a power station circulation system (300), it comprises the circulation that boiler unit (33), main steam turbine unit (30), vapour condenser unit (31) and backheat unit (32) are constituted, wherein said main steam turbine unit (30) and/or described boiler unit (33) provide steam source (34), it is characterized in that, also comprise:
-power station regenerative heat type steam-operating blower system as claimed in claim 1 (100), wherein said steam source (34) provides driving steam for small turbine (11);
-backheat unit (32), the steam discharge of wherein said power station regenerative heat type small turbine system (100) enters described backheat unit (32); And the heat? recovery of described backheat unit (32) is to described boiler unit (33).
4. system as claimed in claim 3 is characterized in that, described main steam turbine unit (30) is made up of high-pressure cylinder (301), intermediate pressure cylinder (302), low pressure (LP) cylinder (303) in regular turn;
Wherein,
The admission of described high-pressure cylinder (301) is main steam (341); Steam discharge is hot cold section steam (342) again;
The admission of described intermediate pressure cylinder (302) is hot arc steam (343) again; Steam discharge is intermediate pressure cylinder steam discharge (344).
5. system as claimed in claim 3 is characterized in that, the steam source (34) that enters described power station regenerative heat type small turbine system (100) is selected from one or more in the following vapour source:
Main steam (341); Hot colder section steam (342), again hot arc steam (343), intermediate pressure cylinder steam discharge (344), main steam turbine draw gas, the intermediate steam of boiler unit, auxiliary steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201817820U CN201851183U (en) | 2010-04-29 | 2010-04-29 | Back heating type steam-driven forced draught blower system for power plant and thermal circulation system for power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201817820U CN201851183U (en) | 2010-04-29 | 2010-04-29 | Back heating type steam-driven forced draught blower system for power plant and thermal circulation system for power plant |
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| Publication Number | Publication Date |
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| CN201851183U true CN201851183U (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201817820U Expired - Lifetime CN201851183U (en) | 2010-04-29 | 2010-04-29 | Back heating type steam-driven forced draught blower system for power plant and thermal circulation system for power plant |
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| CN (1) | CN201851183U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864732A (en) * | 2015-05-15 | 2015-08-26 | 西安热工研究院有限公司 | Evaporation type condenser system used for thermal power plant small steam turbine steam exhaust condensing |
-
2010
- 2010-04-29 CN CN2010201817820U patent/CN201851183U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864732A (en) * | 2015-05-15 | 2015-08-26 | 西安热工研究院有限公司 | Evaporation type condenser system used for thermal power plant small steam turbine steam exhaust condensing |
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Granted publication date: 20110601 |