CN101899999A - Small turbine system in power plant and thermal cycle system in power plant containing same - Google Patents
Small turbine system in power plant and thermal cycle system in power plant containing same Download PDFInfo
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- CN101899999A CN101899999A CN2009100522301A CN200910052230A CN101899999A CN 101899999 A CN101899999 A CN 101899999A CN 2009100522301 A CN2009100522301 A CN 2009100522301A CN 200910052230 A CN200910052230 A CN 200910052230A CN 101899999 A CN101899999 A CN 101899999A
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Abstract
The invention provides a small turbine system in a power plant for recovering the exhaust steam heat to the thermal cycle system in the power plant. The system comprises a backheating-type small turbine unit and a driven device driven by the backheating-type small turbine unit. The backheating-type small turbine unit comprises a small turbine, a small turbine admission pipe system and a small turbine exhaust pipe system. The small turbine admission pipe system is arranged on the upstream of the small turbine and receives steam source from the thermal cycle system in the power plant; the small turbine exhaust pipe system is arranged on the downstream of the small turbine; the exhaust steam of the small turbine exhaust pipe system enters to the backheating unit of the thermal cycle system in the power plant so that the exhaust heat is recovered. The invention further provides a backheating system and a thermal cycle system in the power plant containing the small turbine system in the power plant. The systems can greatly improve the power supply efficiency of the unit.
Description
Technical field
The present invention relates to power plant system, particularly a kind of power station small turbine system and contain the power station circulation system of this 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 that the main equipment with the power station is changed into by small turbine by motoring and driving, and can cancel jumbo motor like this, to reach the purpose that significantly reduces station service.Described " small turbine " be i.e. auxiliary turbine for main steam turbine also.
The system of prior art employing small turbine driving arrangement (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 31, is water of condensation by the circulating water condensation of small turbine vapour condenser 31.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, in above-mentioned traditional condensed steam type small turbine actuation techniques, because the efficient of small turbine is more much lower than main steam turbine, thereby after causing some main equipments are 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 small turbine that both adopted and drives, and can reduce power plant's electricity consumption again, and the while can be recovered to exhaust steam heat in the thermodynamic cycle, thereby has significantly improved the system of the power supply efficiency of unit.
Summary of the invention
First purpose of the present invention is to provide a kind of small turbine that both adopted to drive, and can reduce power plant's electricity consumption again, and the while can be recovered to exhaust steam heat in the thermodynamic cycle, thereby has significantly improved the power station small turbine system of the power supply efficiency of unit.
Second purpose of the present invention is to provide a kind of small turbine that both adopted to drive, and can reduce power plant's electricity consumption again, and the while can be recovered to exhaust steam heat in the thermodynamic cycle, thereby has significantly improved the heat regenerative system of the power supply efficiency of unit.
The 3rd purpose of the present invention is to provide a kind of small turbine that both adopted to drive, and can reduce power plant's electricity consumption again, and the while can be recovered to exhaust steam heat in the thermodynamic cycle, thereby has significantly improved the power station circulation system of the power supply efficiency of unit.
The 4th purpose of the present invention is to provide a kind of small turbine that both adopted to drive, can reduce power plant's electricity consumption again, exhaust steam heat can be recovered in the thermodynamic cycle simultaneously, thereby the power station circulation system that has significantly improved the power supply efficiency of unit reclaims the method for exhaust steam heat.
A first aspect of the present invention provides a kind of power station small turbine system, is used for its exhaust steam heat is recycled to the power station circulation system, and described system comprises:
-regenerative heat type small turbine unit; 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
-be located at the small turbine exhaust steam pipeline in described small turbine downstream; The steam discharge of described small turbine exhaust steam pipeline enters the backheat unit of described power station circulation system, makes that exhaust steam heat obtains reclaiming;
-and by the driven equipment of described regenerative heat type small turbine unit drives.
In a specific embodiment of the present invention, described driven equipment is selected from:
Boiler induced-draft fan, boiler fan, boiler primary air fan, desulfurization booster fan, boiler feed pump, condensate pump, circulating water pump, air compressor or other equipment that need drive.
A second aspect of the present invention provides a kind of heat regenerative system, and it is used for its exhaust steam heat is recycled to the power station circulation system: described heat regenerative system comprises:
-power station of the present invention small turbine system,
-being located at the backheat unit in small turbine system downstream, power station, the steam discharge from described power station small turbine system is accepted in wherein said backheat unit.
In a specific embodiment of the present invention, described backheat unit is selected from one or more in the following equipment:
Deaerating heater, low-pressure heater, high-pressure heater or other backheat equipment.
In a specific embodiment of the present invention, wherein said backheat unit is selected from deaerating heater.
A third aspect of the present invention provides a kind of power station circulation system, it comprises the circulation that boiler unit, main steam turbine unit, vapour condenser unit and backheat unit are constituted, wherein said main steam turbine unit and/or described boiler unit provide steam source, and this system also comprises:
-power station of the present invention small turbine system, wherein said steam source provides driving steam for the small turbine of described small turbine system;
-backheat unit, the steam discharge of wherein said power station regenerative heat type small turbine system enters described backheat unit; And the heat? recovery of described backheat unit is to described boiler unit.
In a specific embodiment of the present invention, described main steam turbine unit (30) is made up of high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder in regular turn;
Wherein,
The admission of described high-pressure cylinder is a main steam; Steam discharge is hot cold section steam again;
The admission of described intermediate pressure cylinder is hot arc steam again; Steam discharge is the intermediate pressure cylinder steam discharge.
In a specific embodiment of the present invention, the steam source that enters described power station small turbine system is selected from one or more in the following vapour source:
Main steam; Hot colder section steam, hot arc steam, intermediate pressure cylinder steam discharge, 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 draw gas be main steam turbine high, medium and low cylinder pressure certain the level draw gas.
In an embodiment, the intermediate steam of described boiler unit is the intermediate steam of boiler superheater or reheater.
In a specific embodiment of the present invention, described backheat unit is selected from one or more in the following equipment:
Deaerating heater, low-pressure heater, high-pressure heater or other backheat equipment.
In a specific embodiment of the present invention, the steam of wherein said steam source enters described deaerating heater.
A fourth aspect of the present invention provides a kind of power station circulation system to reclaim the method for exhaust steam heat, may further comprise the steps:
Form the vapor recycle pipeline by boiler unit, main steam turbine unit, power station regenerative heat type small turbine system and backheat unit;
Wherein, the vapor recycle in the described vapor recycle pipeline is as follows:
Described main steam turbine unit and/or boiler unit provide steam source,
Described steam source provides driving steam to described power station regenerative heat type small turbine system;
The steam discharge of described power station regenerative heat type small turbine system by on the described vapor recycle pipeline the backheat unit be recovered to described boiler unit.
The invention has the advantages that:
A kind of power station regenerative heat type small turbine system is provided, can select the steam in multiple vapour source to drive the small turbine rotation, drive multiple driven equipment with small turbine then, steam discharge is optionally connected goes into multiple backheat equipment, thereby 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.Replace motor applications in the power station, can improve the reduction station service, improved the power supply benefit of unit.
In addition, can be as required, the steam source of the small turbine of power station regenerative heat type small turbine system and backheat unit are selected flexibly and reached necessary requirement.
Description of drawings
Fig. 1 is the auxiliary small turbine system of the condensing power station of prior art, and small turbine steam discharge wherein enters the main frame vapour condenser;
Fig. 2 is the auxiliary small turbine system of the condensing power station of prior art, and small turbine steam discharge wherein enters independent vapour condenser;
Fig. 3 is condensing power station of the present invention small turbine system (100) and the heat regenerative system (200) that contains this small turbine system (100) and the power station circulation system (300) that contains said system.
Embodiment
The inventor is through extensive and deep research, by changing technological process, problem at the prior art existence, a kind of new heat regenerative generation power plant small turbine system is provided, 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 present invention on this basis.
Herein, described " power station " comprising: thermal power plant, nuclear power plant, biomass power generation factory, gas turbine power plant, steel chemical papermaking instrument other industry power plant for self-supply, but be not limited to this.Also comprise the system that other needs small turbine to drive.
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.
Herein, described " small turbine " auxiliary turbine for main steam turbine.Described " small turbine " is the conventional term of related domain.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.
Herein, described " upstream " is meant the upstream of steam flow; Described " downstream " is meant the downstream of steam flow.Described " in regular turn " is meant the order according to the flow direction of steam.
Other aspects of the present invention are because the disclosure of this paper is conspicuous to those skilled in the art.
Regenerative heat type small turbine unit and driven equipment
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 invention is produced restriction to get final product.Those skilled in the art are according to normal condition, or select small turbine according to the condition that manufacturer advises.
The equipment that is driven by small turbine can be one or more in the following equipment:
1) boiler induced-draft fan (also comprising the induced draught fan that boiler induced-draft fan and desulfurization booster fan merge);
2) boiler fan;
3) boiler primary air fan;
4) desulfurization booster fan;
5) boiler feed pump;
6) condensate pump;
7) circulating water pump;
8) air compressor;
9) other equipment that need drive.
The said equipment all can adopt the conventional equipment of related domain.
Regenerative heat type small turbine of the present invention unit is running like this: key point 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 backheat unit, power station (as: deaerating heater or high and low pressure heater), to reclaim heat and working medium, improve cycle efficiency greatly.The small turbine of using with the driving arrangement of prior art adopts the condensed steam type system, enters vapour condenser, only reclaims working medium and does not reclaim the heat difference.
The power station heat regenerative system
Power station of the present invention heat regenerative system is used for its exhaust steam heat is recycled to the power station circulation system: described heat regenerative system comprises: above-mentioned power station small turbine system (100), with the backheat unit (32) that is located at described power station small turbine system (100) downstream, the steam discharge from described power station small turbine system (100) is accepted in wherein said backheat unit (32).
Backheat unit (32) can be one or more in the following equipment:
1) deaerating heater;
2) low-pressure heater;
3) high-pressure heater;
4) other backheat equipment.
During use, enter described backheat unit from the steam source of power station circulation system.
In the prior art, low-pressure heater, deaerating heater, high-pressure heater are known, but they are used to reclaim the steam discharge of power station circulation system and do not reclaim heat.As shown in Figure 1, the small turbine steam discharge enters the main frame vapour condenser, be water of condensation by the circulating water condensation of main frame vapour condenser, 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.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 drain along with circulating water, thereby make whole circulation efficient not high.
The inventor finds that the steam source of spontaneous power plant circulation system enters backheat of the present invention unit in the future, can improve cycle efficiency greatly, and whole system still reaches stable simultaneously.
Especially, described backheat unit (32) is selected from deaerating heater (322).At this moment, the steam source from the power station circulation system enters described deaerating heater (322).
High-pressure heater of the present invention can adopt traditional high-pressure heater.Preferably, the vapor pressure of described high-pressure heater is not less than 1.5 MPas, includes but not limited to 1.5 MPas-10 MPa; Hydraulic pressure is preferably the 20-40 MPa.Above-mentioned pressure can adjust accordingly according to the power station scale.
Deaerating heater of the present invention can adopt traditional deaerating heater.Preferably, the mixed pressure of the steam of described deaerating heater and water includes but not limited to 1 MPa-1.5 MPa.Above-mentioned pressure can adjust accordingly according to the power station scale.
Low-pressure heater of the present invention can adopt traditional low-pressure heater.Preferably, the vapor pressure of described low-pressure heater is not higher than 1 MPa; Hydraulic pressure is not higher than 4.5 MPas.Above-mentioned pressure can adjust accordingly according to the power station scale.
Usually, the order of connection of described backheat unit is to be from upstream to the downstream to be: low-pressure heater, deaerating heater, high-pressure heater.
The power station circulation system
Power station of the present invention circulation system 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), and it also comprises:
-power station of the present invention small turbine system (100), wherein above-mentioned steam source (34) provides driving steam for the small turbine (11) of described small turbine system (100);
-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 described 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 can provide steam source alone, and perhaps two unit provide steam source simultaneously.
For example, described steam source (34) can be from the main steam turbine unit of power station circulation system: 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).Described steam source (34) can also draw gas from the high, medium and low cylinder pressure level of main steam turbine.
The present invention adopts traditional main steam turbine unit, related domain, usually by high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder.Described high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder are known for those skilled in the art, and its parameter can be participated in the power-plant engineering handbook.
The steam source (34) that also has can be from the boiler unit of power station circulation system, for example intermediate steam of boiler unit.
Steam source (34) can also have the steam of the degree of superheat from the auxiliary steam of the described power station circulation system steam of other power station thermodynamic cycles (for example from) and other.
Described steam source can adopt above a kind of vapour source, also can merge above-mentioned vapour source.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 the backheat unit by the small turbine exhaust steam pipeline, and the heat of steam discharge and working medium are recovered in the thermodynamic cycle.
Below in conjunction with specific embodiment, further illustrate the present invention.Should be understood that these embodiments only to be used to the present invention is described and be not used in and limit the scope of the invention.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 among the present invention.
Embodiment
As shown in Figure 3, show an embodiment of power station of the present invention 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 limitation of the present invention with explaining.
Fig. 3 shows a kind of power station of the present invention regenerative heat type small turbine 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 driven equipment 2 of described small turbine 1.
Wherein, described driven equipment 2 is selected from: boiler induced-draft fan, boiler fan, boiler primary air fan, desulfurization booster fan, boiler feed pump, condensate pump, circulating water pump, air compressor or other equipment that need drive.
In an optional embodiment, described driven equipment can also be the device that boiler induced-draft fan and desulfurization booster fan merge.
Fig. 3 also shows the heat regenerative system 200 that is used for described small turbine 11, wherein small turbine 11 steam discharges is entered backheat unit 32, with the heat? recovery of steam discharge in power station circulation system 300.
Described backheat unit 32 can be selected from one or more in the following equipment: deaerating heater 322, low-pressure heater 321, high-pressure heater 323 or other backheat equipment.Preferably be selected from deaerating heater 322.
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 small turbine system 100, the steam of wherein said steam source 34 inserts described power station regenerative heat type small turbine system 100; And 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 small turbine 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 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 invention is running like this:
Form vapor recycle pipeline 400 by boiler unit 33, main steam turbine unit 30, power station regenerative heat type small turbine 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 small turbine system 100; 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.Particularly, the small turbine 11 of described steam source 34 in described power station regenerative heat type small turbine system 100 provides driving steam; Described driving steam is used for driving the driven equipment 2 of described power station regenerative heat type small turbine system 100; The exhaust steam heat of described small turbine 11 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 present invention has reached following effect:
One, back-heating type small turbine system are compared with existing condensing-type small turbine system, 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 air-introduced machine into by condensing-type, move per year estimation in 5500 hours, can save coal-fired about 5000 tons every year, by coal-fired 600 yuan of calculating per ton, then benefit of saving coal is 3,000,000/year.
Two, the back-heating type small turbine system is compared with the electric motor drive 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 air-introduced machine into by motor, then station service power consumption rate descends about 1%, move per year estimation in 5500 hours, can save coal-fired about 10000 tons every year, by coal-fired 600 yuan of calculating per ton, then benefit of saving coal is 6,000,000/year.
Three, after the employing back-heating type small turbine system, under the prerequisite of guaranteed efficiency, the driving device of main equipment no longer is subjected to the capacity limit of motor. Such as the common 6kV electric pressure in power plant, be subjected to the restriction of starting current, the maximum motor power that allows under this voltage is about 8000～9000kW, 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. The back-heating type small turbine 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 present invention mentions, just quoted as a reference separately as each piece document.Should be understood that in addition after having read foregoing of the present invention, those skilled in the art can make various changes or modifications the present invention, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (10)
1. a power station small turbine system (100) is characterized in that, is used for its exhaust steam heat is recycled to power station circulation system (300), and described power station small turbine system system (100) comprising:
-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), makes that exhaust steam heat obtains reclaiming;
-and by the driven equipment (2) of described regenerative heat type small turbine unit (1) driving.
2. the system as claimed in claim 1 is characterized in that, described driven equipment (2) is selected from:
Boiler induced-draft fan, boiler fan, boiler primary air fan, desulfurization booster fan, boiler feed pump, condensate pump, circulating water pump, air compressor or other equipment that need drive.
3. a power station heat regenerative system (200) is characterized in that, is used for its exhaust steam heat is recycled to power station circulation system (300): described heat regenerative system (200) comprising:
-power station as claimed in claim 1 small turbine system (100),
-being located at the backheat unit (32) in described power station small turbine system (100) downstream, the steam discharge from described power station small turbine system (100) is accepted in wherein said backheat unit (32).
4. power station as claimed in claim 3 heat regenerative system (200) is characterized in that, 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.
5. power station as claimed in claim 4 heat regenerative system (200) is characterized in that, wherein said backheat unit (32) is selected from deaerating heater (322).
6. 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 as claimed in claim 1 small turbine system (100), wherein said steam source (34) provides driving steam for the small turbine (11) of described small turbine system (100);
-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).
7. system as claimed in claim 6 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).
8. system as claimed in claim 7 is characterized in that, the steam source (34) that enters described power station 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.
9. method that adopts system recoveries exhaust steam heat as claimed in claim 6 may further comprise the steps:
Form vapor recycle pipeline (400) by boiler unit (33), main steam turbine unit (30), power station regenerative heat type small turbine system (100) and backheat unit (32);
Wherein, the vapor recycle in the described vapor recycle pipeline (400) is as follows:
Described main steam turbine unit (30) and/or boiler unit (33) provide steam source (34),
Described steam source (34) provides driving steam to described power station regenerative heat type small turbine system (100);
The steam discharge of described power station regenerative heat type small turbine system (100) by on the described vapor recycle pipeline (400) backheat unit (32) be recovered to described boiler unit (33).
10. method as claimed in claim 9, wherein: the vapor recycle in the described power station regenerative heat type small turbine system (100) is as follows:
The small turbine (11) of described steam source (34) in described power station regenerative heat type small turbine system (100) provides driving steam;
Described driving steam is used for driving the driven equipment (2) of described power station regenerative heat type small turbine system (100);
The exhaust steam heat of described small turbine (11) enters described backheat unit (32); And the heat? recovery of described backheat unit (32) is to described boiler unit (33).
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| CN2009100522301A CN101899999A (en) | 2009-05-31 | 2009-05-31 | Small turbine system in power plant and thermal cycle system in power plant containing same |
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| CN2009100522301A CN101899999A (en) | 2009-05-31 | 2009-05-31 | Small turbine system in power plant and thermal cycle system in power plant containing same |
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| CN2009100522301A Pending CN101899999A (en) | 2009-05-31 | 2009-05-31 | Small turbine system in power plant and thermal cycle system in power plant containing same |
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| CN102235658A (en) * | 2011-04-20 | 2011-11-09 | 华能国际电力股份有限公司海门电厂 | Hearth negative pressure control method and system for coal-fired generating unit draught fan driven by small steam turbine |
| CN102678207A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system with twice reheating |
| CN102678204A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Single reheating thermal system |
| CN103485848A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine |
| CN103485849A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system of backpressure steam extraction small turbine which is coaxial with double reheating main turbine |
| CN103498708A (en) * | 2013-10-10 | 2014-01-08 | 中国电力工程顾问集团华东电力设计院 | Air-cooling reheating unit system arranged in small back-pressure type steam turbine and used for driving feed pump |
| CN103644004A (en) * | 2013-12-20 | 2014-03-19 | 上海电气电站设备有限公司 | Double-turbine and combined cycle heat and power combined supply system |
| CN104976671A (en) * | 2015-06-26 | 2015-10-14 | 中国能源建设集团广东省电力设计研究院有限公司 | Wide-load heat supply energy-saving system of back pressure type small turbine drive water supply pump |
| CN105042666A (en) * | 2015-06-26 | 2015-11-11 | 中国能源建设集团广东省电力设计研究院有限公司 | Wide-load heat supply energy saving system of back pressure type small turbine driving induced draft fan |
| CN105888748A (en) * | 2016-04-19 | 2016-08-24 | 刘子旺 | Comprehensive energy efficiency system for heating low-pressure cylinder polished shaft cooling and small turbine steam exhaust waste heat recovery |
| CN107288694A (en) * | 2017-08-02 | 2017-10-24 | 辽宁清河发电有限责任公司 | The method that back pressure turbine asynchronous generating unit is run in non-heating period |
| CN107313818A (en) * | 2017-08-02 | 2017-11-03 | 辽宁清河发电有限责任公司 | Using the energy-saving generating plant of back pressure turbine asynchronous generating unit |
| CN107313814A (en) * | 2017-06-23 | 2017-11-03 | 济南市琦泉热电有限责任公司 | A kind of coal-fired mud power plant system that can be lightened the burden for condenser and method |
| CN107476838A (en) * | 2017-08-02 | 2017-12-15 | 大唐东北电力试验研究所有限公司 | The cascaded utilization of energy system and utilization of power method of Thermal Power Station |
| CN110762510A (en) * | 2019-10-24 | 2020-02-07 | 浙江新中港清洁能源股份有限公司 | Steam waste heat utilization system |
| CN111140299A (en) * | 2020-01-14 | 2020-05-12 | 西安热工研究院有限公司 | Deaerator heating steam source configuration system and method under transient working condition of nuclear power station |
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| CN102678207A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system with twice reheating |
| CN102678204A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Single reheating thermal system |
| CN102678204B (en) * | 2011-03-18 | 2014-12-17 | 中国电力工程顾问集团华东电力设计院 | Single reheating thermal system |
| CN102235658A (en) * | 2011-04-20 | 2011-11-09 | 华能国际电力股份有限公司海门电厂 | Hearth negative pressure control method and system for coal-fired generating unit draught fan driven by small steam turbine |
| CN103485848A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine |
| CN103485849A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Thermodynamic system of backpressure steam extraction small turbine which is coaxial with double reheating main turbine |
| CN103498708A (en) * | 2013-10-10 | 2014-01-08 | 中国电力工程顾问集团华东电力设计院 | Air-cooling reheating unit system arranged in small back-pressure type steam turbine and used for driving feed pump |
| CN103644004A (en) * | 2013-12-20 | 2014-03-19 | 上海电气电站设备有限公司 | Double-turbine and combined cycle heat and power combined supply system |
| CN103644004B (en) * | 2013-12-20 | 2015-09-16 | 上海电气电站设备有限公司 | The cogeneration system of a kind of pair of turbine, combined cycle |
| CN105042666A (en) * | 2015-06-26 | 2015-11-11 | 中国能源建设集团广东省电力设计研究院有限公司 | Wide-load heat supply energy saving system of back pressure type small turbine driving induced draft fan |
| CN104976671A (en) * | 2015-06-26 | 2015-10-14 | 中国能源建设集团广东省电力设计研究院有限公司 | Wide-load heat supply energy-saving system of back pressure type small turbine drive water supply pump |
| CN105042666B (en) * | 2015-06-26 | 2021-07-27 | 中国能源建设集团广东省电力设计研究院有限公司 | Wide-load heat supply energy-saving system of back pressure type small steam turbine driven draught fan |
| CN104976671B (en) * | 2015-06-26 | 2021-07-23 | 中国能源建设集团广东省电力设计研究院有限公司 | Wide-load heat supply energy-saving system of back pressure type small steam turbine driven water feeding pump |
| CN105888748A (en) * | 2016-04-19 | 2016-08-24 | 刘子旺 | Comprehensive energy efficiency system for heating low-pressure cylinder polished shaft cooling and small turbine steam exhaust waste heat recovery |
| CN107313814B (en) * | 2017-06-23 | 2019-08-20 | 济南市琦泉热电有限责任公司 | A kind of can be the coal-fired mud power plant system and method for condenser Reduction of Students' Study Load |
| CN107313814A (en) * | 2017-06-23 | 2017-11-03 | 济南市琦泉热电有限责任公司 | A kind of coal-fired mud power plant system that can be lightened the burden for condenser and method |
| CN107476838A (en) * | 2017-08-02 | 2017-12-15 | 大唐东北电力试验研究所有限公司 | The cascaded utilization of energy system and utilization of power method of Thermal Power Station |
| CN107313818A (en) * | 2017-08-02 | 2017-11-03 | 辽宁清河发电有限责任公司 | Using the energy-saving generating plant of back pressure turbine asynchronous generating unit |
| CN107288694A (en) * | 2017-08-02 | 2017-10-24 | 辽宁清河发电有限责任公司 | The method that back pressure turbine asynchronous generating unit is run in non-heating period |
| CN110762510A (en) * | 2019-10-24 | 2020-02-07 | 浙江新中港清洁能源股份有限公司 | Steam waste heat utilization system |
| CN110762510B (en) * | 2019-10-24 | 2021-08-10 | 浙江新中港热电股份有限公司 | Steam waste heat utilization system |
| CN111140299A (en) * | 2020-01-14 | 2020-05-12 | 西安热工研究院有限公司 | Deaerator heating steam source configuration system and method under transient working condition of nuclear power station |
| CN111140299B (en) * | 2020-01-14 | 2024-06-04 | 西安热工研究院有限公司 | System and method for configuring heating steam source of deaerator under transient working condition of nuclear power station |
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