CN103362770A - System and method of back pressure type small steam turbine driving water supply pump for power frequency electric generator speed adjustment - Google Patents
System and method of back pressure type small steam turbine driving water supply pump for power frequency electric generator speed adjustment Download PDFInfo
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Abstract
The invention discloses a system of a back pressure type small steam turbine driving water supply pump for power frequency electric generator speed adjustment. The system comprises a back pressure type small steam turbine, a water supply pump set, a power frequency electric generator and a speed adjustment gearbox. The back pressure type small steam turbine, the water supply pump set, the power frequency electric generator and the speed adjustment gearbox are coaxially connected. The speed adjustment gearbox is arranged between the back pressure type small steam turbine and the power frequency electric generator. After the speed is adjusted by the speed adjustment gearbox, the power frequency electric generator is driven to rotate. The rotating speed of the back pressure type small steam turbine is controlled through the control over the output of the power frequency electric generator, so that the rotating speed of the water supply pump set is controlled. According to the system of the back pressure type small steam turbine driving water supply pump for power frequency electric generator speed adjustment, the loss of steam inlet and throttling of the small steam turbine is greatly reduced, the operation efficiency is improved, the power capability of the small steam turbine is fully developed, and operation benefits are increased. The invention further discloses a steam electric generator set and a method for adjusting the rotating speed of the water supply pump.
Description
Technical field
The present invention relates to steam-turbine power plant, be specifically related to small turbine and drive feed-water pump.
Background technique
In large capacity high parameter steam turbine power generation factory, usually configure the steam feed pump group.Drive feed water pump with small turbine, will feed water and improve pressure, supply with the subsequent technique system.This small turbine can adopt back pressure type.Change according to unit load, need the respective change of exerting oneself of feed water pump, the respective change by speed of feedwater satisfies usually, and speed of feedwater is by the rotating speed decision of the small turbine of coaxial connection.
Completely send out in order to satisfy long-term summer unit, the nominal output of the small turbine usually nominal output than feed water pump is large, and the nominal output of feed water pump is exerted oneself greatly than unit rated load is needed, therefore the nominal output of small turbine has larger allowance, is generally more than 20%.
Fig. 1～3rd, the back pressure type small turbine of modulating valve throttle grverning drives the feed-water pump schematic flow sheet in the prior art.In the prior art, the back pressure type small turbine drives feed-water pump and generally is provided with small turbine 1, admission modulating valve 5 and feed water pump 6, in the part system (as shown in Figures 2 and 3) also be provided with front-mounted pump 10 and constant-speed ratio gear-box 11.By the aperture of control admission modulating valve 5, can control the rotating speed of small turbine 1.
This configuration causes small turbine admission modulating valve most working time of aperture less, causes restriction loss.In addition and since generator set load with electrical network demand every day in lifting, when low-load, the accent valve opening of small turbine can be less, restriction loss is larger.In general, affect the small turbine operational efficiency more than 5%.Except above-mentioned restriction loss, because the acting ability of small turbine can not be given full play to, there is relative economic loss.Drive in the feed-water pump at back pressure type small turbine that existing steam electric power unit configures, annual most of working times, particularly during the unit low-load, small turbine is exerted oneself and is all underused.The needs of for example completely sending out long-term summer in order to satisfy unit, to 1 1000MW ultra supercritical power generation unit, the small turbine that usually configures 2 50% capacity drives the feed water pump group system.The declared working condition power demand of feed water pump is about 17000kW, and supporting small turbine maximum output is about 22000kW, and every unit small turbine allowance of exerting oneself is (22000-17000) x2=10000kW.The small turbine of every unit does not on average utilize power for more than the 10000kW, and there is very large problem in this allowance configuration.
Summary of the invention
The object of the present invention is to provide a kind of restriction loss little, the exert oneself back pressure type small turbine of the high industrial frequency generator speed governing of utilization ratio of small turbine drives feed-water pump.It is in large capacity high parameter steam turbine power generation factory that the back pressure type small turbine of industrial frequency generator speed governing of the present invention drives feed-water pump, after the pressure that is used for feeding water that generator set configures improves, supply with one of indispensable system of institute of subsequent technique system.
System of the present invention comprises; Back pressure type small turbine, feed water pump (or feed water pump group), industrial frequency generator and timing gear roller box, wherein,
The back pressure type small turbine is provided with admission pipeline, exhaust duct and modulating valve, the steam of admission pipeline comes from the high pressure steam of generator thermodynamic system, blow-off line is connected with low-temperature heat source heater or heat exchanger, and modulating valve is arranged on the admission pipeline, is used for regulating the logical vapour amount of high pressure steam.
The back pressure type small turbine can be matched extraction line, and extraction line is connected with high temperature heat source (high-pressure steam source) heater or heat exchanger.The back pressure type small turbine can be as required, configuration one-level extraction line, secondary extraction line or the above extraction line of secondary (such as three grades of extraction lines, level Four extraction line etc.).The feed water pump group links to each other with the back pressure type small turbine is coaxial, and namely feed water pump is connected on the rotatingshaft of back pressure type small turbine.Feed water pump of the present invention can be equipment of feed water pump, also can be two equipment of front-mounted pump and feed water pump.In another preference, can match the constant-speed ratio gear-box to front-mounted pump.
The timing gear roller box is used for changing rotating speed and is converted to fixed rotating speed; The optional pattern with clutch function of timing gear roller box.The output terminal of timing gear roller box can be connected to drive industrial frequency generator with the input end of industrial frequency generator and rotate.
Alternatively, industrial frequency generator can be connected on the same rotatingshaft of back pressure type small turbine with feed water pump.Industrial frequency generator can link to each other with the axle head of back pressure type small turbine both sides respectively with the feed water pump group, also can be connected in the same axle head of back pressure type small turbine.
When industrial frequency generator and feed water pump group were positioned at respectively the axle head of back pressure type small turbine both sides, the timing gear roller box and linked to each other with back pressure type small turbine and industrial frequency generator are coaxial between back pressure type small turbine and industrial frequency generator.The input end that is the timing gear roller box links to each other with the axle head of a side of back pressure type small turbine, and the input end of feed water pump group links to each other with the axle head of the opposite side of back pressure type small turbine.
When industrial frequency generator and feed water pump group were positioned at the same axle head of back pressure type small turbine, alternatively, the timing gear roller box was arranged between feed water pump and the industrial frequency generator, and links to each other with feed water pump group and industrial frequency generator are coaxial.The input end that is the timing gear roller box links to each other with the output terminal of feed water pump group, and the input end of feed water pump group links to each other with the axle head of back pressure type small turbine.
In system of the present invention, the rotating speed of feed water pump group variation can be passed through the adjusting of timing gear roller box, be converted into the power frequency rotating speed of 50Hz or 60Hz, rotate thereby drive industrial frequency generator, the Partial Power of back pressure type small turbine is electric for exporting power frequency.
The back pressure type small turbine of system of the present invention, feed water pump group, industrial frequency generator and timing gear roller box are coaxial linking to each other.When the feed water pump group is comprised of front-mounted pump and feed water pump, when the rotating speed difference of front-mounted pump and feed water pump is larger, can the constant-speed ratio gear-box be set the rotatingshaft between front-mounted pump and feed water pump, to regulate both rotating speed ratio, satisfy the needs of generator set load variations.
Because back pressure type small turbine of the present invention drives the feed water pump group system and regulates the rotating speed of feed water pump group by exerting oneself of control industrial frequency generator, to satisfy the needs of generator set load variations, therefore, within most working time of the whole year, the aperture of the modulating valve of back pressure type small turbine can keep large aperture (70%-100%) for a long time, even when the unit load step-down, can take full advantage of exerting oneself of back pressure type small turbine, generate electricity by industrial frequency generator, not only significantly reduced restriction loss, and improved the operational efficiency of back pressure type small turbine, improve the sale of electricity income of power plant.
The present invention comprises that also the back pressure type small turbine that disposes the industrial frequency generator speed governing drives the steam electric power unit of feed water pump group system.
According to an aspect of the present invention, provide a kind of back pressure type small turbine of industrial frequency generator speed governing to drive feed-water pump, described system comprises back pressure type small turbine, feed water pump, industrial frequency generator and timing gear roller box, wherein,
Described back pressure type small turbine, described feed water pump, described industrial frequency generator and described coaxial linking to each other of timing gear roller box;
Described timing gear roller box is configured between described back pressure type small turbine and the described industrial frequency generator, rotates thereby the rotation of described back pressure type small turbine drives described industrial frequency generator after by the speed governing of described timing gear roller box; And
By controlling the output of described industrial frequency generator, thereby control the rotating speed of described back pressure type small turbine, and then control the rotating speed of described feed water pump.
Preferably, the back pressure type small turbine is provided with the admission pipeline, and described admission pipeline is provided with modulating valve.
Preferably, feed water pump can link to each other with the axle head of back pressure type small turbine both sides respectively with industrial frequency generator.
Preferably, industrial frequency generator can link to each other via the axle head of timing gear roller box with a side of back pressure type small turbine, and the input end of feed water pump can link to each other with the axle head of the opposite side of back pressure type small turbine.
Preferably, feed water pump, industrial frequency generator and timing gear roller box can be connected in the same axle head of back pressure type small turbine.
Preferably, industrial frequency generator can link to each other with the feedwater delivery side of pump via the timing gear roller box, and the input end of feed water pump links to each other with the axle head of back pressure type small turbine.
Preferably, system also can comprise front-mounted pump, and industrial frequency generator is connected with feed water pump between feed water pump and front-mounted pump and via the timing gear roller box, and perhaps front-mounted pump is between industrial frequency generator and feed water pump.
Preferably, system also can comprise the constant-speed ratio gear-box, and the constant-speed ratio gear-box is connected with front-mounted pump, is used for regulating the rotating speed of front-mounted pump.
According to a further aspect in the invention, also provide a kind of steam electric power unit, wherein, the back pressure type small turbine that generator set disposes above-mentioned industrial frequency generator speed governing drives feed-water pump.
According to another aspect of the invention, a kind of method that the back pressure type small turbine drives the rotating speed of feed water pump in the feed-water pump of regulating also is provided, system comprises back pressure type small turbine and feed water pump, wherein, in system, set up industrial frequency generator, by the output of control industrial frequency generator, thus the rotating speed of control back pressure type small turbine, and then the rotating speed of control feed water pump.
System of the present invention takes full advantage of the acting ability of small turbine, and by the industrial frequency generator generating, every 1000MW unit can externally be powered 7,500 ten thousand kilowatts every year more, and the direct economy income is more than 1,500 ten thousand yuan.
In should be understood that within the scope of the present invention, above-mentioned each technical characteristics of the present invention and can making up mutually between specifically described each technical characteristics in below (eg embodiment), thus consist of new or preferred technological scheme.As space is limited, this tired stating no longer one by one.
Description of drawings
Fig. 1-the 3rd, the back pressure type small turbine of modulating valve throttle grverning drives three typical system flow schematic diagram of feed-water pump in the prior art.
Fig. 4 is the system flow schematic diagram that drives feed-water pump according to the back pressure type small turbine of industrial frequency generator speed governing in the first embodiment of the present invention.
Fig. 5 is the system flow schematic diagram that the back pressure type small turbine of according to a second embodiment of the present invention middle industrial frequency generator speed governing drives feed-water pump.
Fig. 6 is the system flow schematic diagram that the back pressure type small turbine of industrial frequency generator speed governing in a third embodiment in accordance with the invention drives feed-water pump.
Fig. 7 is the system flow schematic diagram that the back pressure type small turbine of industrial frequency generator speed governing in a fourth embodiment in accordance with the invention drives feed-water pump.
Fig. 8 is the system flow schematic diagram that the back pressure type small turbine of according to a fifth embodiment of the invention middle industrial frequency generator speed governing drives feed-water pump.
Embodiment
The inventor is through deeply widely research, discovery by with the coaxial industrial frequency generator that is connected of back pressure type small turbine, not only can be by the mode of exerting oneself of control industrial frequency generator, partly or entirely replace the modulating valve mode, rotating speed with the control small turbine, thereby the rotating speed of control feed water pump, and can utilize industrial frequency generator to generate electricity, thus take full advantage of exerting oneself of small turbine.The modulating valve of small turbine of the present invention can keep high aperture for a long time, and aperture is 70%-100%, has greatly reduced the loss that throttling causes, and has taken full advantage of exerting oneself of small turbine, so that the operational efficiency of small turbine has improved 5%-10%.Finished on this basis the present invention.
Terminological interpretation:
Industrial frequency generator: the electricity that sends when normally moving is the generator of fixed frequency, and common is 50Hz or 60Hz.
The back pressure type small turbine: steam discharge is called the back pressure type small turbine to the steam turbine that is higher than atmospheric heat exchanger or heat supply network.
Coaxial linking to each other: refer to that each equipment connection is on same rotation axis system.
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments only to be used for explanation the present invention and be not used in and limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example is usually according to normal condition or the condition of advising according to manufacturer.
Unless otherwise defined, employed all specialties are identical with the meaning that scientific words and one skilled in the art are familiar with in the literary composition.In addition, any method similar or impartial to described content and material all can be applicable in the inventive method.The usefulness that better implementation methods described in the literary composition and material only present a demonstration.
Embodiment 1
As shown in Figure 4, the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment driving feed-water pump comprises that small turbine 1, admission pipeline 2, blow-off line 3, extraction line 4, modulating valve 5, feed water pump (or other pump) 6, timing gear roller box 7, industrial frequency generator 8, transformer 9 form.Wherein the steam inlet of small turbine 1 is connected with admission pipeline 2, the steam of admission pipeline comes the high pressure steam of self generating sets thermodynamic system, the steam-expelling port of small turbine 1 is connected with blow-off line 3, and blow-off line is connected with low-temperature heat source (low-pressure steam source) heater or heat exchanger (not marking among the figure).Modulating valve 5 is installed at admission pipeline place, is used for regulating the logical vapour amount of high pressure steam, in the present embodiment, modulating valve can keep high aperture for a long time, and aperture is 70%～100%, need to reduce aperture or close when equipment failure or maintenance.Feed water pump 6 is positioned at the axle head of back pressure type small turbine one side, feed water pump 6 and 1 coaxial connection of small turbine, and the input end of feed water pump 6 links to each other with the axle head of small turbine 1 one sides.Industrial frequency generator 8 is positioned at the axle head of back pressure type small turbine 1 opposite side, and auxiliary tone speed gear-box 7 between small turbine 1 and industrial frequency generator 8, this timing gear roller box 7 and 1 coaxial connection of small turbine, this timing gear roller box 7 also with 8 coaxial connections of industrial frequency generator.The input end of timing gear roller box 7 links to each other with the axle head of small turbine 1 this side, and the output terminal of timing gear roller box 7 links to each other with the input end of industrial frequency generator 8 and rotates to drive industrial frequency generator 8.
If voltage is not simultaneously between industrial frequency generator 8 output voltages and the electrical network during operation, transformer 9 can be set between industrial frequency generator 8 and electrical network, industrial frequency generator 8 electricity transformations can be arrived the voltage that mates with electrical network by transformer 9, realize supplying with in the factory industrial frequency generator 8 electricity or factory's external power grid.
The System Working Principle of the present embodiment is as follows:
When small turbine 1 normal operation, the modulating valve 5 of small turbine 1 keeps high aperture (70%-100%).High pressure steam enters small turbine 1 by admission pipeline 2, and the low pressure steam after the acting is discharged to the hot users such as low-temperature heat source (low-pressure steam source) heater or heat exchanger by blow-off line 3.Steam Actuation small turbine 1 rotates, and rotates thereby drag with the coaxial feed water pump that is connected 6 of small turbine 1 one side shaft ends.
When Steam Actuation small turbine 1 rotates, after another axle head of small turbine 1 passes through 7 speed governing of timing gear roller box, be converted to the power frequency rotating speed of 50Hz or 60Hz, drag industrial frequency generator 8 and rotate.This moment, the Partial Power of small turbine 1 was output as the power frequency electricity, supplied with in the factory or factory's external power grid.Become large or diminish by the output of regulating industrial frequency generator 8, the load of control back pressure type small turbine 1 correspondingly becomes large or diminishes, thereby the rotating speed of back pressure type small turbine 1 correspondingly diminishes or becomes large, and then the rotating speed of control feed water pump 6 diminishes or becomes greatly, to satisfy different working condition requirements.
In other words, namely by the output (exerting oneself) of control industrial frequency generator 8, can partly or entirely replace the modulating valve throttle style, the rotating speed of control small turbine 1, thereby when efficiently satisfying feed water pump 6 rotating speeds control requirement, improved the operational efficiency of back pressure type small turbine.
If voltage is not simultaneously between industrial frequency generator 8 output voltages and the electrical network, transformer 9 can be set between industrial frequency generator 8 and electrical network, industrial frequency generator 8 electricity transformations can be arrived the voltage that mates with electrical network by transformer 9, realize supplying with in the factory industrial frequency generator 8 electricity or factory's external power grid.
As shown in Figure 5, system's difference of the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment driving feed-water pump and embodiment 1 is:
Feed water pump 6 and industrial frequency generator 8 are positioned at the same axle head of small turbine 1, the input end of feed water pump 6 links to each other with the axle head of small turbine 1, the output terminal of feed water pump 6 links to each other with the input end of timing gear roller box 7, and the output terminal of timing gear roller box 7 links to each other with the input end of industrial frequency generator 8 is coaxial.The System Working Principle of the present embodiment is as follows:
When Steam Actuation small turbine 1 rotates, drag simultaneously coaxial feed water pump 6 and rotate, the rotation of feed water pump 6 drives industrial frequency generator 8 rotation generatings by the adjusting of timing gear roller box 7.Become large or diminish by the output of regulating industrial frequency generator 8, thus the rotating speed of control small turbine 1, and then the rotating speed of control feed water pump 6 is to satisfy different working condition requirements.
As shown in Figure 6, system's difference of the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment driving feed-water pump and embodiment 1 is:
In the present embodiment, what small turbine 1 drove is not only a feed water pump, but a feed water pump group, this feed water pump group is comprised of front-mounted pump (or other pumps) 10 and feed water pump (or other pumps) 6, and this feed water pump group is positioned at the same axle head of small turbine.According to the rotating speed ratio between front-mounted pump 10 and the feed water pump 6, between front-mounted pump 10 and feed water pump 6, constant-speed ratio gear-box 11 is set optionally, constant-speed ratio gear-box 11 and 6 coaxial connections of feed water pump, constant-speed ratio gear-box 11 also with 10 coaxial connections of front-mounted pump, and the input end of constant-speed ratio gear-box 11 links to each other with the output terminal of feed water pump 6, and the output terminal of constant-speed ratio gear-box 11 links to each other with the input end of front-mounted pump 10.
The System Working Principle of the present embodiment is as follows:
When Steam Actuation small turbine 1 rotates, drag simultaneously coaxial feed water pump 6 and rotate, after regulating by the deceleration of constant-speed ratio gear-box 11, front-mounted pump 10 also rotates simultaneously, and front-mounted pump 10 rotating speeds are less than feed water pump 6.Feed water pump group when work at first front-mounted pump 10 can carry out pressurization first time to feedwater, then feed water pump 6 can carry out the second time to feedwater and pressurizes.Another axle head of small turbine is converted to the power frequency rotating speed of 50Hz or 60Hz by after 7 speed governing of timing gear roller box simultaneously, drags industrial frequency generator 8 and rotates.This moment, the Partial Power of small turbine 1 was output as the power frequency electricity, supplied with in the factory or factory's external power grid.Become large or diminish by the output of regulating industrial frequency generator 8, the load of control back pressure type small turbine 1 correspondingly becomes large or diminishes, thereby the rotating speed of back pressure type small turbine 1 correspondingly diminishes or becomes large, and then the rotating speed of control feed water pump group (or other pump groups) diminishes or becomes greatly, to satisfy different working condition requirements.If voltage is not simultaneously between industrial frequency generator 8 output voltages and the electrical network, transformer 9 can be set between industrial frequency generator 8 and electrical network, industrial frequency generator 8 electricity transformations can be arrived the voltage that mates with electrical network by transformer 9, realize supplying with in the factory industrial frequency generator 8 electricity or factory's external power grid.
Embodiment 4
As shown in Figure 7, system's difference of the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment driving feed-water pump and embodiment 3 is:
The System Working Principle of the present embodiment is as follows:
When Steam Actuation small turbine 1 rotates, drag simultaneously coaxial feed water pump (or other pump) 6 and rotate, after 7 speed governing of timing gear roller box, be converted to the power frequency rotating speed of 50Hz or 60Hz, drag industrial frequency generator 8 and rotate.This moment, the Partial Power of small turbine 1 was output as the power frequency electricity, supplied with in the factory or factory's external power grid.Because front-mounted pump 10 and 8 coaxial connections of industrial frequency generator, front-mounted pump (or other pumps) 10 also rotates, and simultaneously, front-mounted pump (or other pumps) 10 rotating speeds are less than the rotating speed of feed water pump (or other pumps) 6.Feed water pump group when work at first front-mounted pump (or other pumps) 10 can carry out pressurization first time to feedwater, then feed water pump (or other pumps) 6 can carry out the second time to feedwater and pressurizes.Become large or diminish by the output of regulating industrial frequency generator 8, the load of control back pressure type small turbine 1 correspondingly becomes large or diminishes, thereby the rotating speed of back pressure type small turbine 1 correspondingly diminishes or becomes large, and then the rotating speed of control feed water pump group (or other pump groups) diminishes or becomes greatly, to satisfy different working condition requirements.If voltage is not simultaneously between industrial frequency generator 8 output voltages and the electrical network, transformer 9 can be set between industrial frequency generator 8 and electrical network, industrial frequency generator 8 electricity transformations can be arrived the voltage that mates with electrical network by transformer 9, realize supplying with in the factory industrial frequency generator 8 electricity or factory's external power grid.
As shown in Figure 8, system's difference of the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment driving feed-water pump and embodiment 4 is:
The input end of the industrial frequency generator 8 of the present embodiment links to each other with the output terminal of front-mounted pump 10 is coaxial, and configures timing gear roller box 7 between feed water pump (or other pumps) 6 and front-mounted pump (or other pumps) 10.Coaxial the linking to each other of output terminal of the input end of timing gear roller box 7 and feed water pump (or other pumps) 6, coaxial the linking to each other of input end of the output terminal of timing gear roller box 7 and front-mounted pump (or other pumps) 10.
The System Working Principle of the present embodiment is as follows:
When Steam Actuation small turbine 1 rotates, dragging simultaneously coaxial feed water pump (or other pump) 6 rotates, after 7 speed governing of timing gear roller box, be converted to the power frequency rotating speed of 50Hz or 60Hz, dragging front-mounted pump (or other pumps) 10 rotates, front-mounted pump (or other pumps) 10 rotating speeds are less than the rotating speed of feed water pump (or other pumps) 6, because industrial frequency generator 8 and 10 coaxial connections of front-mounted pump, industrial frequency generator 8 also rotates.This moment, the Partial Power of small turbine 1 was output as the power frequency electricity, supplied with in the factory or factory's external power grid.Feed water pump group when work at first front-mounted pump (or other pumps) 10 can carry out pressurization first time to feedwater, then feed water pump (or other pumps) 6 can carry out the second time to feedwater and pressurizes.Become large or diminish by the output of regulating industrial frequency generator 8, the load of control back pressure type small turbine 1 correspondingly becomes large or diminishes, thereby the rotating speed of back pressure type small turbine 1 correspondingly diminishes or becomes large, and then the rotating speed of control feed water pump group (or other pump groups) diminishes or becomes greatly, to satisfy different working condition requirements.If voltage is not simultaneously between industrial frequency generator 8 output voltages and the electrical network, transformer 9 can be set between industrial frequency generator 8 and electrical network, industrial frequency generator 8 electricity transformations can be arrived the voltage that mates with electrical network by transformer 9, realize supplying with in the factory industrial frequency generator 8 electricity or factory's external power grid.
System of the present invention both can be by feed water pump group rotating speed adjusting to satisfy the needs of generator set load variations, also can generate electricity to improve by industrial frequency generator the sale of electricity income of power plant, the variable-frequency electric that industrial frequency generator sends can be supplied with in the factory or factory's external power grid, if voltage is different between the electricity that industrial frequency generator sends and the electrical network, then can by transformer is set, the electricity transformation be arrived the voltage that mates with electrical network.
Compared with prior art, the present invention has following major advantage:
(1) with the common aperture of back pressure type small turbine modulating valve in the present system from being increased to 100% below 60%, and can keep for a long time large aperture level, significantly reduced small turbine because of with the loss that throttling causes that is complementary of driving arrangement power demand.
(2) operational efficiency of back pressure type small turbine of the present invention can improve more than the 5%-10%, saves the mark coal 1000MW unit year more than 5000 tons for every, significantly reduces operating cost, and reaches the comprehensive benefit that reduces pollutant emission.
(3) system of the present invention takes full advantage of the acting ability of small turbine, and by the industrial frequency generator generating, every 1000MW unit can externally be powered 7,500 ten thousand kilowatts every year more, and the direct economy income is more than 1,500 ten thousand yuan.
The above-mentioned feature that the present invention mentions, or the feature that embodiment mentions can combination in any.All features that this case specification discloses can with any composition forms and usefulness, each feature that discloses in the specification, the alternative characteristics that can anyly be provided identical, impartial or similar purpose replaces.Therefore except special instruction is arranged, the feature that discloses only is the general example of equalization or similar features.
All quote in this application as a reference at all documents that the present invention mentions, just as each piece document is quoted separately as a reference.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after having read above-mentioned instruction content of the present invention, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (10)
1. the back pressure type small turbine of an industrial frequency generator speed governing drives feed-water pump, it is characterized in that, described system comprises back pressure type small turbine, feed water pump, industrial frequency generator and timing gear roller box, wherein,
Described back pressure type small turbine, described feed water pump, described industrial frequency generator and described coaxial linking to each other of timing gear roller box;
Described timing gear roller box is configured between described back pressure type small turbine and the described industrial frequency generator, rotates thereby the rotation of described back pressure type small turbine drives described industrial frequency generator after by the speed governing of described timing gear roller box; And
By controlling the output of described industrial frequency generator, thereby control the rotating speed of described back pressure type small turbine, and then control the rotating speed of described feed water pump.
2. the system as claimed in claim 1 is characterized in that, described back pressure type small turbine is provided with the admission pipeline, and described admission pipeline is provided with modulating valve.
3. the system as claimed in claim 1 is characterized in that, described feed water pump links to each other with the axle head of described back pressure type small turbine both sides respectively with described industrial frequency generator.
4. system as claimed in claim 3, it is characterized in that, described industrial frequency generator links to each other via the axle head of described timing gear roller box with a side of described back pressure type small turbine, and the input end of described feed water pump links to each other with the axle head of the opposite side of described back pressure type small turbine.
5. the system as claimed in claim 1 is characterized in that, described feed water pump, described industrial frequency generator and described timing gear roller box are connected in the same axle head of described back pressure type small turbine.
6. system as claimed in claim 5 is characterized in that, described industrial frequency generator links to each other with described feedwater delivery side of pump via described timing gear roller box, and the input end of described feed water pump links to each other with the axle head of described back pressure type small turbine.
7. system as claimed in claim 5, it is characterized in that, described system also comprises front-mounted pump, described industrial frequency generator is connected with described feed water pump between described feed water pump and described front-mounted pump and via described timing gear roller box, and perhaps described front-mounted pump is between described industrial frequency generator and described feed water pump.
8. system as claimed in claim 7 is characterized in that, described system also comprises the constant-speed ratio gear-box, and the input end of described front-mounted pump links to each other with the output terminal of described constant-speed ratio gear-box, is used for regulating the rotating speed of described front-mounted pump.
9. a steam electric power unit is characterized in that, described generator set disposes system claimed in claim 1.
10. regulate the method that the back pressure type small turbine drives the rotating speed of feed water pump in the feed-water pump for one kind, described system comprises back pressure type small turbine and feed water pump, it is characterized in that, in described system, set up industrial frequency generator, by controlling the output of described industrial frequency generator, thereby control the rotating speed of back pressure type small turbine, and then control the rotating speed of described feed water pump.
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| CN104074704A (en) * | 2014-04-28 | 2014-10-01 | 芜湖凯博尔高科实业有限公司 | Steam and electricity hybrid double-power energy-saving water pump |
| CN104295329A (en) * | 2014-08-28 | 2015-01-21 | 北京联优创展科技有限公司 | Power generation system |
| CN107100853A (en) * | 2017-07-04 | 2017-08-29 | 山西漳电大唐塔山发电有限公司 | A kind of auxiliary power system for two-shipper backheat |
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| CN111794935A (en) * | 2020-08-13 | 2020-10-20 | 刘亚辉 | Method for splitting steam feed pump system into small steam turbine power generation system and full-frequency-conversion electric feed pump system |
| CN113482731A (en) * | 2021-07-19 | 2021-10-08 | 内蒙古京泰发电有限责任公司 | Synchronous adjustable water supply system based on turbo generator unit |
| CN113482729A (en) * | 2021-07-19 | 2021-10-08 | 内蒙古京泰发电有限责任公司 | Motor intelligent synchronous switching water supply system based on turbo generator set |
| CN113638776A (en) * | 2021-08-09 | 2021-11-12 | 华能国际电力股份有限公司上海石洞口第一电厂 | Steam extraction back pressure type steam turbine thermodynamic system and control method thereof |
| CN113638776B (en) * | 2021-08-09 | 2023-09-15 | 华能国际电力股份有限公司上海石洞口第一电厂 | Steam extraction back pressure type steam turbine thermodynamic system and control method thereof |
| CN114412585A (en) * | 2022-03-11 | 2022-04-29 | 西安热工研究院有限公司 | Steam-carbon dioxide coupled power generation system |
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