CN203515699U - Pure-condensation type small steam turbine fan driving system with speed adjusting through frequency conversion generator and generator set - Google Patents
Pure-condensation type small steam turbine fan driving system with speed adjusting through frequency conversion generator and generator set Download PDFInfo
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- CN203515699U CN203515699U CN201320494114.7U CN201320494114U CN203515699U CN 203515699 U CN203515699 U CN 203515699U CN 201320494114 U CN201320494114 U CN 201320494114U CN 203515699 U CN203515699 U CN 203515699U
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Abstract
The utility model discloses a pure-condensation type small steam turbine fan driving system with speed adjusting through frequency conversion generator and a generator set. The system comprises a pure-condensation type small steam turbine, a fan and the frequency conversion generator. The pure-condensation type small steam turbine, the fan and the frequency conversion generator are coaxially connected. The system controls rotation speed of the pure-condensation type small steam turbine through control over output of the frequency conversion generator, and then rotation speed of the fan is controlled. According to the system, losses of steam admission throttling of the small steam turbine are greatly reduced, operation efficiency is improved, the working capacity of the small steam turbine is brought into a full play, and operation benefits are increased. The utility model further discloses the steam generator set.
Description
Technical field
The utility model relates to the field of energy-saving technology of power generation system, relates to particularly a kind of pure condensate formula small turbine drive blower fan system and steam electric power unit of frequency conversion generator speed governing.
Background technique
In large capacity high parameter steam turbine power generation factory, conventionally dispose as blower fans such as steam-operating blower fans, these blower fans drive by steam turbine as little in pure condensate formula, the pressure of the working medium such as air, flue gas or combustion gas can be improved to supply subsequent technique system.
Due to the needs of generator set load variations, usually there is respective change in exerting oneself of blower fan, the needs that therefore conventionally change by the variation of the rotating speed of blower fan being met to unit load, and the rotating speed of blower fan to be rotating speed by the little steam turbine coaxially connecting determine.
In order to meet the needs that summer, generator set was completely sent out for a long time, therefore the nominal output of little steam turbine is conventionally large than the nominal output of blower fan, and the nominal output of blower fan is exerted oneself greatly than generator set rated load is needed conventionally, so the nominal output of little steam turbine has larger allowance, generally more than 50%.In current small turbine drive blower fan system, little steam turbine disposes admission modulating valve, by the aperture of modulating valve, can control the rotating speed of little steam turbine, thereby meets the needs of generator set load variations.Yet this configuration is usually less due to the aperture of little steam turbine admission modulating valve under most working time, therefore easily causes larger restriction loss.
In addition, due to the load of generator set with electrical network demand every day all in continuous variation, it is low that load has height to have, therefore, when low-load, the aperture of the admission modulating valve of little steam turbine can be less, thereby the restriction loss causing is larger.And because the ability of the acting of little steam turbine can not be given full play to, therefore also there is relatively large economic loss.
Therefore, how for the throttle grverning problem of existing pure condensate formula small turbine drive blower fan system, develop a kind of loss that can effectively reduce little steam turbine admission throttling, can make full use of again driving blower fan system that little steam turbine exerts oneself and be current steam turbine power generation factory in energy-saving field problem demanding prompt solution.
Model utility content
The purpose of this utility model is to provide a kind of restriction loss little, little steam turbine exert oneself pure condensate formula small turbine drive blower fan system and the steam electric power unit of the high frequency conversion generator speed governing of utilization ratio.
First aspect of the present utility model provides a kind of pure condensate formula small turbine drive blower fan system of frequency conversion generator speed governing, and described system comprises the little steam turbine of pure condensate formula, blower fan and frequency conversion generator, wherein,
The little steam turbine of described pure condensate formula, blower fan are coaxially connected with frequency conversion generator;
Described system passes through to control the output of described frequency conversion generator, thereby controls the rotating speed of the little steam turbine of described pure condensate formula, thereby controls the rotating speed of described blower fan.
In another preference, the little steam turbine of described pure condensate formula also comprises steam-expelling port.
In another preference, described steam-expelling port is connected with vapour condenser by blow-off line.
In another preference, described vapour condenser is the vapour condenser of public or separate configurations.
In another preference, the little steam turbine of described pure condensate formula is provided with admission pipeline, and described admission pipeline is provided with modulating valve.
In another preference, the high aperture of the long-term maintenance of the aperture of described modulating valve, the scope of aperture is 70%-100%.
In another preference, described blower fan is connected with the axle head of the little steam turbine of described pure condensate formula both sides respectively with frequency conversion generator.
In another preference, described system also comprises constant-speed ratio gear-box, and described constant-speed ratio gear-box is coaxially connected with frequency conversion generator with the little steam turbine of described pure condensate formula, blower fan, wherein,
Described constant-speed ratio gear-box is between the little steam turbine of described pure condensate formula and frequency conversion generator; And/or
Described constant-speed ratio gear-box is between described blower fan and the little steam turbine of pure condensate formula.
In another preference, described constant-speed ratio gear-box has clutch function.
In another preference, described constant-speed ratio gear-box is clutch.
In another preference, described constant-speed ratio gear-box is between the little steam turbine of described pure condensate formula and frequency conversion generator, and the input end of described constant-speed ratio gear-box is connected with the axle head of a side of the little steam turbine of described pure condensate formula, the input end of described blower fan is connected with the axle head of the opposite side of the little steam turbine of described pure condensate formula.
In another preference, described constant-speed ratio gear-box is between described blower fan and the little steam turbine of pure condensate formula, and the input end of described constant-speed ratio gear-box is connected with the axle head of a side of the little steam turbine of described pure condensate formula, the input end of described frequency conversion generator is connected with the axle head of the opposite side of the little steam turbine of described pure condensate formula.
In another preference, described blower fan and frequency conversion generator are connected in the same axle head of the little steam turbine of described pure condensate formula.
In another preference, the input end of described frequency conversion generator is connected with the axle head of a side of the little steam turbine of described pure condensate formula, and the output terminal of frequency conversion generator is connected with the input end of described blower fan.
In another preference, described system also comprises constant-speed ratio gear-box, and described constant-speed ratio gear-box is coaxially connected with frequency conversion generator with the little steam turbine of described pure condensate formula, blower fan, wherein,
Described constant-speed ratio gear-box is between the little steam turbine of described pure condensate formula and frequency conversion generator; Or
Described constant-speed ratio gear-box is between described blower fan and frequency conversion generator.
In another preference, described constant-speed ratio gear-box is between the little steam turbine of described pure condensate formula and frequency conversion generator, and the input end of described constant-speed ratio gear-box is connected with the axle head of a side of the little steam turbine of described pure condensate formula, and the output terminal of described frequency conversion generator is connected with the input end of described blower fan.
In another preference, described constant-speed ratio gear-box is between described blower fan and frequency conversion generator, and the input end of described constant-speed ratio gear-box is connected with the output terminal of described frequency conversion generator, the output terminal of described constant-speed ratio gear-box is connected with the input end of described blower fan.
In another preference, described blower fan comprises: medium is the blower fan of air or flue gas, compressor, the gas turbine that medium is air or combustion gas.
The utility model second aspect provides a kind of steam electric power unit, and described generator set disposes the system described in first aspect.
In should be understood that within the scope of the utility model, above-mentioned each technical characteristics of the present utility model and can combining mutually between specifically described each technical characteristics in below (eg embodiment), thus form new or preferred technological scheme.As space is limited, at this, tire out and state no longer one by one.
Accompanying drawing explanation
Fig. 1 is existing pure condensate formula small turbine drive blower fan system schematic diagram.
Fig. 2 is a kind of schematic diagram of the utility model embodiment 1 system.
Fig. 3 is the another kind of schematic diagram of the utility model embodiment 1 system.
Fig. 4 is the utility model embodiment 2 system schematic.
Fig. 5 is the utility model embodiment 3 system schematic.
Embodiment
Inventor is through deeply research widely, discovery is by being coaxially connected frequency conversion generator with the little steam turbine of pure condensate formula, not only can be by controlling the mode of exerting oneself of frequency conversion generator, partly or entirely replace modulating valve mode, to control the rotating speed of little steam turbine, thereby control the rotating speed of blower fan, and can utilize frequency conversion generator to generate electricity, thereby take full advantage of exerting oneself of little steam turbine.The aperture of the modulating valve of the little steam turbine of the utility model can keep high aperture (aperture scope is 70%-100%) for a long time, has greatly reduced the loss that throttling causes, and has made full use of exerting oneself of little steam turbine, make little steam turbine operational efficiency raising 8%-20%.Completed on this basis the utility model.
As used herein, for the generator that " frequency conversion generator " refers to respect to conventional power generation usage is fixed frequency, the frequency of generating is at any time at the generator changing in a big way.
As used herein, " the little steam turbine of pure condensate formula ", " pure condensate formula small turbine ", " little steam turbine " and " small turbine " are used interchangeably, and refer to that steam discharge arrives the steam turbine of subatmospheric vapour condenser.
As used herein, " being coaxially connected " refers to that each equipment connection is on same rotation axis system.
Pure condensate formula small turbine drive blower fan system and the steam electric power unit of frequency conversion generator speed governing
The pure condensate formula small turbine drive blower fan system of frequency conversion generator speed governing of the present utility model is in large capacity high parameter steam turbine power generation factory, generator set configure for after the pressure of the working medium such as air, flue gas or combustion gas is improved, supply with one of indispensable system of subsequent technique system institute.
System of the present utility model comprises: the little steam turbine of pure condensate formula, blower fan and frequency conversion generator, wherein, the little steam turbine of pure condensate formula is provided with admission pipeline, blow-off line and modulating valve, the steam of admission pipeline carrys out the high pressure steam of self generating sets thermodynamic system, blow-off line is connected with the vapour condenser of public or separate configurations, modulating valve is arranged on admission pipeline, for regulating the logical vapour amount of high pressure steam;
Blower fan of the present utility model comprises that medium is that the blower fan of air, compressor, working medium that medium is air are other blower fan of flue gas, the medium compressor that is combustion gas or gas turbine etc.
Frequency conversion generator is connected on the same rotation axis system of the little steam turbine of pure condensate formula together with blower fan.Frequency conversion generator can be connected with the axle head of the little steam turbine of pure condensate formula both sides respectively with blower fan, also can be connected in the same axle head of the little steam turbine of pure condensate formula.
When frequency conversion generator and blower fan lay respectively at the axle head of the little steam turbine of pure condensate formula both sides, and when blower fan and the little steam turbine of pure condensate formula, or when the rotating speed ratio between the little steam turbine of pure condensate formula and frequency conversion generator is larger, can be between the little steam turbine of pure condensate formula and frequency conversion generator, and/or arrange and there is clutch function constant-speed ratio gear-box or clutch on the rotatingshaft between blower fan and the little steam turbine of pure condensate formula.To regulate both rotating speed ratio, meet the needs of generator set load variations.
Constant-speed ratio gear-box or clutch are between the little steam turbine of pure condensate formula and frequency conversion generator time, the input end of constant-speed ratio gear-box or clutch is connected with the axle head of a side of the little steam turbine of pure condensate formula, and the input end of blower fan is connected with the axle head of the opposite side of the little steam turbine of pure condensate formula.
Constant-speed ratio gear-box or clutch are between blower fan and the little steam turbine of pure condensate formula time, the input end of constant-speed ratio gear-box or clutch is connected with the axle head of a side of the little steam turbine of pure condensate formula, and the input end of frequency conversion generator is connected with the axle head of the opposite side of the little steam turbine of pure condensate formula.
When frequency conversion generator and blower fan are positioned at the same axle head of the little steam turbine of pure condensate formula, the input end of frequency conversion generator is connected with the axle head of a side of the little steam turbine of pure condensate formula, and the output terminal of frequency conversion generator is connected with the input end of blower fan.Can according to specific needs, between the little steam turbine of pure condensate formula and frequency conversion generator, or arrange and there is clutch function constant-speed ratio gear-box or clutch on the rotatingshaft between blower fan and frequency conversion generator.
Constant-speed ratio gear-box or clutch are between blower fan and frequency conversion generator time, and the input end of constant-speed ratio gear-box or clutch is connected with the output terminal of frequency conversion generator, and the output terminal of constant-speed ratio gear-box or clutch is connected with the input end of blower fan.
Constant-speed ratio gear-box or clutch are between the little steam turbine of pure condensate formula and frequency conversion generator time, and the input end of constant-speed ratio gear-box or clutch is connected with the axle head of a side of the little steam turbine of pure condensate formula, and the output terminal of frequency conversion generator is connected with the input end of blower fan.
Because pure condensate formula small turbine drive blower fan system of the present utility model regulates the rotating speed of blower fan by controlling exerting oneself of frequency conversion generator, to meet the needs of generator set load variations, therefore, within most working time of the whole year, the aperture of the modulating valve of the little steam turbine of pure condensate formula can keep high aperture (aperture scope is at 70%-100%) for a long time, even when unit load step-down, can be by the variation of rotation speed of fan, make full use of exerting oneself of the little steam turbine of pure condensate formula, by frequency conversion generator, generate electricity, not only significantly reduced restriction loss, and improved the operational efficiency of the little steam turbine of pure condensate formula, improve the sale of electricity income of power plant.
The utility model also comprises the steam electric power unit of the pure condensate formula small turbine drive blower fan system that disposes frequency conversion generator speed governing.
System of the present utility model both can be by rotation speed of fan adjusting to meet the needs of generator set load variations, also can generate electricity to improve by frequency conversion generator the sale of electricity income of power plant, the variable-frequency electric that frequency conversion generator sends can direct all or part of supply variable-frequency electric user, also can all or part ofly pass through current transformer, become the variable-frequency electric mating with electrical network, supply with Chang Neihuo factory external power grid.If voltage is different between the electricity that frequency conversion generator sends and electrical network, can be by transformer is set, by electricity transformation to the voltage mating with electrical network.
In the pure condensate formula small turbine drive blower fan system configuring at existing steam electric power unit, annual most of working times, particularly during unit low-load, small turbine is exerted oneself and is all underused.The needs of for example completely sending out summer all the year round in order to meet unit, the small turbine that 1 1000MW steam electric power unit is configured conventionally to 2 50% capacity drives blower fan system.The declared working condition power demand of blower fan is about 6000kW, and supporting small turbine maximum output is about 10000kW, and every unit small turbine is exerted oneself allowance for (10000-6000) x2=8000kW.Therefore the small turbine of every unit does not on average utilize power for more than 8000kW, and this allowance configuration exists very large problem.
In addition, because little steam turbine needs throttling, reduction is exerted oneself, and mates with blower fan (as blower fan) power demand, and therefore the control valve opening of little steam turbine is less, and common aperture is below 50%.There is obvious restriction loss.Affect little steam turbine operational efficiency more than 8%.
Compared with prior art, the utlity model has following major advantage:
(1) by the common aperture of the little steam turbine regulating valve of pure condensate formula in current system from being increased to 70%-100% below 50%, and can keep for a long time high aperture level, significantly reduced little steam turbine because of with the loss that throttling causes that matches of driving arrangement power demand.
(2) operational efficiency of the little steam turbine of pure condensate formula of the present utility model can improve 8%-20%, saves mark coal 1000MW unit year more than 4000 tons for every, significantly reduces operating cost, and reaches the comprehensive benefit that reduces pollutant emission.
(3) system of the present utility model makes full use of the acting ability of little steam turbine, by frequency conversion generator, generates electricity, and every 1000MW unit can externally be powered 6,000 ten thousand kilowatts every year, and direct economy income is more than 12,000,000 yuan.
The above-mentioned feature that the utility model is mentioned, or the feature that embodiment mentions can combination in any.All features that this case specification discloses can with any composition forms use, each feature disclosing in specification, the alternative characteristics that can anyly be provided identical, impartial or similar object replaces.Therefore apart from special instruction, the feature disclosing is only the general example of equalization or similar features.
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments are only not used in restriction scope of the present utility model for the utility model is described.The experimental technique of unreceipted actual conditions in the following example, conventionally according to normal condition or the condition of advising according to manufacturer.
Unless otherwise defined, the familiar meaning of all specialties of using in literary composition and scientific words and one skilled in the art is identical.In addition, any method similar or impartial to described content and material all can be applicable in the utility model method.The use that better implementation methods described in literary composition and material only present a demonstration.
As Figure 2-3, the pure condensate formula small turbine drive blower fan system of the frequency conversion generator speed governing of the present embodiment comprises the little steam turbine 1 of pure condensate formula, blower fan 2 and frequency conversion generator 3, wherein, the little steam turbine 1 of pure condensate formula is provided with admission pipeline 11, blow-off line 12 and modulating valve 13, the steam of admission pipeline 11 carrys out the high pressure steam of self generating sets thermodynamic system, blow-off line 12 is connected with the vapour condenser 6 of public or separate configurations, modulating valve 13 is arranged on admission pipeline 11, for regulating the logical vapour amount of high pressure steam, in the present embodiment, the long-term high aperture (70%-100%) that keeps of aperture of modulating valve 13.
The System Working Principle of the present embodiment is as follows:
When little steam turbine normally moves, little steam turbine regulating valve keeps high aperture (70%-100%).High pressure steam enters little steam turbine by admission pipeline, and the low pressure steam after acting is discharged to vacuum vapour condenser by blow-off line.The little steam turbine of Steam Actuation rotates, thereby drag coaxial blower fan, rotates.
Another axle head of the little steam turbine of pure condensate formula drags frequency conversion generator and rotates, by regulating the output of frequency conversion generator become large or diminish, the load of controlling the little steam turbine of pure condensate formula correspondingly becomes large or diminishes, thereby the rotating speed that makes the little steam turbine of pure condensate formula correspondingly diminishes or becomes large, and then the rotating speed of controlling blower fan diminishes or becomes greatly, to meet different working condition requirements.
In other words,, by controlling the output (exerting oneself) of frequency conversion generator, can partly or entirely replace modulating valve throttle style, control the rotating speed of little steam turbine, thereby efficiently meet rotation speed of fan, control when requiring, improve the operational efficiency of the little steam turbine of pure condensate formula.
As shown in Figure 4, the pure condensate formula small turbine drive blower fan system of the frequency conversion generator speed governing of the present embodiment and embodiment 1 system difference are:
The System Working Principle of the present embodiment is as follows:
When the little steam turbine of Steam Actuation rotates, the blower fan that simultaneously drags coaxial connection rotates, and because frequency conversion generator and blower fan are positioned at the same axle head of little steam turbine, and blower fan is positioned at the outside of frequency conversion generator.Therefore by the adjusting of constant-speed ratio gear-box, little steam turbine and then driving frequency conversion generator rotate generating.By regulating the output of frequency conversion generator become large or diminish, thereby the rotating speed of controlling blower fan is to meet different working condition requirements.
As shown in Figure 5, the pure condensate formula small turbine drive blower fan system of the frequency conversion generator speed governing of the present embodiment and embodiment 2 system difference are:
Between blower fan 2 and frequency conversion generator 3, constant-speed ratio gear-box 4 is optionally set, constant-speed ratio gear-box 4 is connected in the same axle of the little steam turbine 1 of pure condensate formula and fastens.The input end of constant-speed ratio gear-box 4 is connected with the output terminal of frequency conversion generator 3, and the output terminal of constant-speed ratio gear-box 4 is connected with the input end of blower fan 2.
All documents of mentioning at the utility model are all quoted as a reference in this application, just as each piece of document, are quoted as a reference separately.In addition should be understood that those skilled in the art can make various changes or modifications the utility model after having read above-mentioned instruction content of the present utility model, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (10)
1. a pure condensate formula small turbine drive blower fan system for frequency conversion generator speed governing, is characterized in that, described system comprises the little steam turbine of pure condensate formula, blower fan and frequency conversion generator, wherein,
The little steam turbine of described pure condensate formula, blower fan are coaxially connected with frequency conversion generator;
Described system passes through to control the output of described frequency conversion generator, thereby controls the rotating speed of the little steam turbine of described pure condensate formula, thereby controls the rotating speed of described blower fan.
2. the system as claimed in claim 1, is characterized in that, the little steam turbine of described pure condensate formula is provided with admission pipeline, and described admission pipeline is provided with modulating valve.
3. the system as claimed in claim 1, is characterized in that, described blower fan is connected with the axle head of the little steam turbine of described pure condensate formula both sides respectively with frequency conversion generator.
4. system as claimed in claim 3, is characterized in that, described system also comprises constant-speed ratio gear-box, and described constant-speed ratio gear-box is coaxially connected with frequency conversion generator with the little steam turbine of described pure condensate formula, blower fan, wherein,
Described constant-speed ratio gear-box is between the little steam turbine of described pure condensate formula and frequency conversion generator; And/or
Described constant-speed ratio gear-box is between described blower fan and the little steam turbine of pure condensate formula.
5. the system as claimed in claim 1, is characterized in that, described blower fan and frequency conversion generator are connected in the same axle head of the little steam turbine of described pure condensate formula.
6. system as claimed in claim 5, is characterized in that, described system also comprises constant-speed ratio gear-box, and described constant-speed ratio gear-box is coaxially connected with frequency conversion generator with the little steam turbine of described pure condensate formula, blower fan, wherein,
Described constant-speed ratio gear-box is between the little steam turbine of described pure condensate formula and frequency conversion generator; Or
Described constant-speed ratio gear-box is between described blower fan and frequency conversion generator.
7. system as claimed in claim 6, it is characterized in that, described constant-speed ratio gear-box is between the little steam turbine of described pure condensate formula and frequency conversion generator, and the input end of described constant-speed ratio gear-box is connected with the axle head of a side of the little steam turbine of described pure condensate formula, and the output terminal of described frequency conversion generator is connected with the input end of described blower fan.
8. system as claimed in claim 6, it is characterized in that, described constant-speed ratio gear-box is between described blower fan and frequency conversion generator, and the input end of described constant-speed ratio gear-box is connected with the output terminal of described frequency conversion generator, the output terminal of described constant-speed ratio gear-box is connected with the input end of described blower fan.
9. the system as claimed in claim 1, is characterized in that, described blower fan comprises: medium is the blower fan of air or flue gas, compressor, the gas turbine that medium is air or combustion gas.
10. a steam electric power unit, is characterized in that, described generator set disposes system claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494114.7U CN203515699U (en) | 2013-08-13 | 2013-08-13 | Pure-condensation type small steam turbine fan driving system with speed adjusting through frequency conversion generator and generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494114.7U CN203515699U (en) | 2013-08-13 | 2013-08-13 | Pure-condensation type small steam turbine fan driving system with speed adjusting through frequency conversion generator and generator set |
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| Publication Number | Publication Date |
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| CN203515699U true CN203515699U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320494114.7U Expired - Fee Related CN203515699U (en) | 2013-08-13 | 2013-08-13 | Pure-condensation type small steam turbine fan driving system with speed adjusting through frequency conversion generator and generator set |
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| CN (1) | CN203515699U (en) |
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2013
- 2013-08-13 CN CN201320494114.7U patent/CN203515699U/en not_active Expired - Fee Related
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