CN203394698U - Feed pump system driven by back pressure-type small steam turbine for speed regulation of power frequency generator - Google Patents
Feed pump system driven by back pressure-type small steam turbine for speed regulation of power frequency generator Download PDFInfo
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- CN203394698U CN203394698U CN201320494158.XU CN201320494158U CN203394698U CN 203394698 U CN203394698 U CN 203394698U CN 201320494158 U CN201320494158 U CN 201320494158U CN 203394698 U CN203394698 U CN 203394698U
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Abstract
The utility model discloses a feed pump system driven by a back pressure-type small steam turbine for speed regulation of a power frequency generator. The system comprises a back pressure-type small steam turbine, a feed pump group, a power frequency generator and a speed control gear case, wherein the back pressure-type small steam turbine, the feed pump group, the power frequency generator and the speed control gear case are coaxially connected; the speed control gear case is arranged between the back pressure-type small steam turbine and the power frequency generator; the power frequency generator is driven to rotate after speed control through a speed control gear box; the rotating speed of the back pressure-type small steam turbine is controlled by controlling output of the power frequency generator, so as to control the rotating speed of the feed pump group. By adopting the system disclosed by the utility model, the loss of intake throttling of the small steam turbine is greatly reduced; the operating efficiency is improved; the power capability of the small steam turbine is fully developed; the operating income is increased. The utility model also discloses a steam generator group.
Description
Technical field
The utility model relates to steam-turbine power plant, is specifically related to small turbine and drives feed-water pump.
Background technique
In large capacity high parameter steam turbine power generation factory, conventionally configure steam feed pump group.With small turbine, drive feed water pump, will feed water and improve pressure, supply with subsequent technique system.This small turbine can adopt back pressure type.According to unit load, change, need the respective change of exerting oneself of feed water pump, the respective change by speed of feedwater meets conventionally, and speed of feedwater is determined by the rotating speed of the small turbine coaxially connecting.
In order to meet long-term summer unit, completely send out, the nominal output of small turbine is conventionally large than the nominal output of feed water pump, 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, in prior art, the back pressure type small turbine of modulating valve throttle grverning drives feed-water pump schematic flow sheet.In prior art, back pressure type small turbine drives feed-water pump to be generally provided with small turbine 1, admission modulating valve 5 and feed water pump 6, in part system (as shown in Figures 2 and 3) be also provided with front-mounted pump 10 and constant-speed ratio gear-box 11.By controlling the aperture of 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, due to generator set load with electrical network demand every day in lifting, when low-load, the tune valve opening of small turbine can be less, restriction loss is larger.In general, affect 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.The back pressure type small turbine that configures at existing steam electric power unit drives in feed-water pump, and annual most of working times, particularly during unit low-load, small turbine is exerted oneself and all underused.The needs of for example completely sending out long-term summer in order to meet unit, to 1 1000MW ultra supercritical power generation unit, the small turbine that conventionally configures 2 50% capacity drives 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 is exerted oneself allowance for (22000-17000) x2=10000kW.The small turbine of every unit does not on average utilize power for more than 10000kW, and this allowance configuration exists very large problem.
Model utility content
The purpose of this utility model is to provide a kind of restriction loss little, and 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 utility model drives feed-water pump, generator set configure for after the pressure of feedwater is improved, supply with one of indispensable system of subsequent technique system institute.
System of the present utility model comprises; Back pressure type small turbine, feed water pump (or feed water pump group), industrial frequency generator and timing gear roller box, wherein,
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 admission pipeline, for regulating the logical vapour amount of high pressure steam.
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.Back pressure type small turbine can be as required, configuration one-level extraction line, secondary extraction line or the above extraction line of secondary (as three grades of extraction lines, level Four extraction line etc.).Feed water pump group is coaxially connected with back pressure type small turbine, and feed water pump is connected on the rotatingshaft of back pressure type small turbine.Feed water pump of the present utility model can be equipment of feed water pump, can be also two equipment of front-mounted pump and feed water pump.In another preference, to front-mounted pump, can match constant-speed ratio gear-box.
Timing gear roller box is for being converted to fixed rotating speed by variation 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 to rotate with the input end of industrial frequency generator.
Alternatively, industrial frequency generator can be connected on the same rotatingshaft of back pressure type small turbine together with feed water pump.Industrial frequency generator can be connected with the axle head of back pressure type small turbine both sides respectively with 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 lay respectively at the axle head of back pressure type small turbine both sides, timing gear roller box, between back pressure type small turbine and industrial frequency generator, and is coaxially connected with industrial frequency generator with back pressure type small turbine.The axle head that is the input end of timing gear roller box and a side of back pressure type small turbine is connected, and the input end of feed water pump group is connected with the axle head of the opposite side of back pressure type small turbine.
When industrial frequency generator and feed water pump group are positioned at the same axle head of back pressure type small turbine, alternatively, timing gear roller box is arranged between feed water pump and industrial frequency generator, and is coaxially connected with industrial frequency generator with feed water pump group.The input end that is timing gear roller box is connected with the output terminal of feed water pump group, and the input end of feed water pump group is connected with the axle head of back pressure type small turbine.
In system of the present utility model, the rotating speed that feed water pump group can be changed regulates by timing gear roller box, is converted into the power frequency rotating speed of 50Hz or 60Hz, thereby drives industrial frequency generator to rotate, and the Partial Power of back pressure type small turbine is used for exporting power frequency electricity.
The back pressure type small turbine of the utility model system, feed water pump group, industrial frequency generator and timing gear roller box are for to be coaxially connected.When 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, constant-speed ratio gear-box can be set on the rotatingshaft between front-mounted pump and feed water pump, to regulate both rotating speed ratio, meet the needs of generator set load variations.
Because driving feed water pump group system, back pressure type small turbine of the present utility model regulates the rotating speed of feed water pump group by controlling exerting oneself of industrial frequency 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 back pressure type small turbine can keep large aperture (70%-100%) for a long time, even when unit load step-down, can make full use of exerting oneself of back pressure type small turbine, by industrial frequency generator, generate electricity, 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 utility model also comprises the steam electric power unit of the back pressure type small turbine driving feed water pump group system that disposes industrial frequency generator speed governing.
According to one side of the present utility model, 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 timing gear roller box are coaxially connected;
Described timing gear roller box is configured between described back pressure type small turbine and described industrial frequency generator, thereby the rotation of described back pressure type small turbine drives described industrial frequency generator to rotate 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, back pressure type small turbine is provided with admission pipeline, and described admission pipeline is provided with modulating valve.
Preferably, feed water pump can be connected with the axle head of back pressure type small turbine both sides respectively with industrial frequency generator.
Preferably, industrial frequency generator can be connected with the axle head of a side of back pressure type small turbine via timing gear roller box, and the input end of feed water pump can be connected 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 be connected with feedwater delivery side of pump via timing gear roller box, and the input end of feed water pump is connected with the axle head of back pressure type small turbine.
Preferably, system also can comprise front-mounted pump, and industrial frequency generator is between feed water pump and front-mounted pump and be connected with feed water pump via timing gear roller box, or front-mounted pump is between industrial frequency generator and feed water pump.
Preferably, system also can comprise constant-speed ratio gear-box, and constant-speed ratio gear-box is connected with front-mounted pump, for regulating the rotating speed of front-mounted pump.
According on the other hand of the present utility model, a kind of steam electric power unit is also provided, 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 present utility model, a kind of method that regulates back pressure type small turbine to drive the rotating speed of feed water pump in feed-water pump is also provided, system comprises back pressure type small turbine and feed water pump, wherein, in system, set up industrial frequency generator, by controlling the output of industrial frequency generator, thereby control the rotating speed of back pressure type small turbine, and then control the rotating speed of feed water pump.
System of the present utility model makes full use of the acting ability of small turbine, by industrial frequency generator, generates electricity, and every 1000MW unit can externally be powered 7,500 ten thousand kilowatts every year, and direct economy income is more than 1,500 ten thousand yuan.
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. 1-3rd, in prior art, the back pressure type small turbine of modulating valve throttle grverning drives three typical system flow schematic diagram of feed-water pump.
Fig. 4 drives the system flow schematic diagram of feed-water pump according to the back pressure type small turbine of industrial frequency generator speed governing in the first embodiment of the present utility model.
Fig. 5 drives the system flow schematic diagram of feed-water pump according to the back pressure type small turbine of industrial frequency generator speed governing in the second embodiment of the present utility model.
Fig. 6 drives the system flow schematic diagram of feed-water pump according to the back pressure type small turbine of industrial frequency generator speed governing in the 3rd embodiment of the present utility model.
Fig. 7 drives the system flow schematic diagram of feed-water pump according to the back pressure type small turbine of industrial frequency generator speed governing in the 4th embodiment of the present utility model.
Fig. 8 drives the system flow schematic diagram of feed-water pump according to the back pressure type small turbine of industrial frequency generator speed governing in the 5th embodiment of the present utility model.
Embodiment
Inventor is through deeply research widely, discovery is by being coaxially connected industrial frequency generator with back pressure type small turbine, not only can be by controlling the mode of exerting oneself of industrial frequency generator, partly or entirely replace modulating valve mode, to control the rotating speed of small turbine, thereby control the rotating speed of feed water pump, and can utilize industrial frequency generator to generate electricity, thereby make full use of exerting oneself of small turbine.The modulating valve of the utility model small turbine 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, makes the operational efficiency of small turbine improve 5%-10%.Completed on this basis the utility model.
Terminological interpretation:
Industrial frequency generator: the generator that the electricity sending while normally moving is fixed frequency, common is 50Hz or 60Hz.
Back pressure type small turbine: steam discharge is called back pressure type small turbine to the steam turbine higher than atmospheric heat exchanger or heat supply network.
Coaxial being connected: refer to that each equipment connection is on same rotation axis system.
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.
Embodiment 1
As shown in Figure 4, the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment drives feed-water pump to comprise 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 carrys out 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 in figure).Modulating valve 5 is installed at admission pipeline place, and 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%, when equipment failure or maintenance, need to reduce aperture or close.Feed water pump 6 is positioned at the axle head of back pressure type small turbine one side, and feed water pump 6 is coaxially connected with small turbine 1, and the input end of feed water pump 6 is connected 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 is coaxially connected with small turbine 1, and this timing gear roller box 7 is also coaxially connected with industrial frequency generator 8.The input end of timing gear roller box 7 is connected with the axle head of small turbine 1 this side, and the output terminal of timing gear roller box 7 is connected to drive industrial frequency generator 8 to rotate with the input end of industrial frequency generator 8.
When during operation, if between industrial frequency generator 8 output voltages and electrical network, voltage is different, transformer 9 can be set between industrial frequency generator 8 and electrical network, by transformer 9, can, by industrial frequency generator 8 electricity transformations to the voltage mating with electrical network, realize industrial frequency generator 8 electricity are supplied with to Chang Neihuo factory 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 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, thereby drag with the coaxial feed water pump being connected 6 of small turbine 1 one side shaft end, rotates.
When Steam Actuation small turbine 1 rotates, another axle head of small turbine 1, by after 7 speed governing of timing gear roller box, is converted to the power frequency rotating speed of 50Hz or 60Hz, drags industrial frequency generator 8 and rotates.Now the Partial Power of small turbine 1 is output as power frequency electricity, supplies with Chang Neihuo factory external power grid.By regulating the output of industrial frequency generator 8 become large or diminish, the load of controlling 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 controlling feed water pump 6 diminishes or becomes greatly, to meet different working condition requirements.
In other words, by controlling the output (exerting oneself) of industrial frequency generator 8, can partly or entirely replace modulating valve throttle style, control the rotating speed of small turbine 1, thereby efficiently meet feed water pump 6 rotating speeds, control when requiring, improved the operational efficiency of back pressure type small turbine.
When if between industrial frequency generator 8 output voltages and electrical network, voltage is different, transformer 9 can be set between industrial frequency generator 8 and electrical network, by transformer 9, can, by industrial frequency generator 8 electricity transformations to the voltage mating with electrical network, realize industrial frequency generator 8 electricity are supplied with to Chang Neihuo factory external power grid.
As shown in Figure 5, the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment drives feed-water pump and embodiment's 1 system difference to be:
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 is connected with the axle head of small turbine 1, the output terminal of feed water pump 6 is connected with the input end of timing gear roller box 7, and the output terminal of timing gear roller box 7 is coaxially connected with the input end of industrial frequency generator 8.The System Working Principle of the present embodiment is as follows:
When Steam Actuation small turbine 1 rotates, drag coaxial feed water pump 6 simultaneously and rotate, the rotation of feed water pump 6 drives industrial frequency generator 8 to rotate generating by the adjusting of timing gear roller box 7.By regulating the output of industrial frequency generator 8 become large or diminish, thereby control the rotating speed of small turbine 1, and then the rotating speed of controlling feed water pump 6 is to meet different working condition requirements.
As shown in Figure 6, the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment drives feed-water pump and embodiment's 1 system difference to be:
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 feed water pump 6, between front-mounted pump 10 and feed water pump 6, constant-speed ratio gear-box 11 is optionally set, constant-speed ratio gear-box 11 is coaxially connected with feed water pump 6, constant-speed ratio gear-box 11 is also coaxially connected with front-mounted pump 10, and the input end of constant-speed ratio gear-box 11 is connected with the output terminal of feed water pump 6, the output terminal of constant-speed ratio gear-box 11 is connected 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 coaxial feed water pump 6 simultaneously and rotate, after the deceleration adjusting by 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.During the work of feed water pump group, first front-mounted pump 10 can pressurize for the first time to feedwater, and then feed water pump 6 can pressurize for the second time to feedwater.Another axle head of small turbine, by after 7 speed governing of timing gear roller box, is converted to the power frequency rotating speed of 50Hz or 60Hz simultaneously, drags industrial frequency generator 8 and rotates.Now the Partial Power of small turbine 1 is output as power frequency electricity, supplies with Chang Neihuo factory external power grid.By regulating the output of industrial frequency generator 8 become large or diminish, the load of controlling 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 controlling feed water pump group (or other pump groups) diminishes or becomes greatly, to meet different working condition requirements.When if between industrial frequency generator 8 output voltages and electrical network, voltage is different, transformer 9 can be set between industrial frequency generator 8 and electrical network, by transformer 9, can, by industrial frequency generator 8 electricity transformations to the voltage mating with electrical network, realize industrial frequency generator 8 electricity are supplied with to Chang Neihuo factory external power grid.
As shown in Figure 7, the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment drives feed-water pump and embodiment's 3 system difference to be:
The System Working Principle of the present embodiment is as follows:
When Steam Actuation small turbine 1 rotates, drag coaxial feed water pump (or other pump) 6 simultaneously 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.Now the Partial Power of small turbine 1 is output as power frequency electricity, supplies with Chang Neihuo factory external power grid.Because front-mounted pump 10 is coaxially connected with industrial frequency generator 8, front-mounted pump (or other pumps) 10 also rotates, and meanwhile, front-mounted pump (or other pumps) 10 rotating speeds are less than the rotating speed of feed water pump (or other pumps) 6.During the work of feed water pump group, first front-mounted pump (or other pumps) 10 can pressurize for the first time to feedwater, and then feed water pump (or other pumps) 6 can pressurize for the second time to feedwater.By regulating the output of industrial frequency generator 8 become large or diminish, the load of controlling 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 controlling feed water pump group (or other pump groups) diminishes or becomes greatly, to meet different working condition requirements.When if between industrial frequency generator 8 output voltages and electrical network, voltage is different, transformer 9 can be set between industrial frequency generator 8 and electrical network, by transformer 9, can, by industrial frequency generator 8 electricity transformations to the voltage mating with electrical network, realize industrial frequency generator 8 electricity are supplied with to Chang Neihuo factory external power grid.
As shown in Figure 8, the back pressure type small turbine of the industrial frequency generator speed governing of the present embodiment drives feed-water pump and embodiment's 4 system difference to be:
The input end of the industrial frequency generator 8 of the present embodiment is coaxially connected with the output terminal of front-mounted pump 10, and configures timing gear roller box 7 between feed water pump (or other pumps) 6 and front-mounted pump (or other pumps) 10.The input end of timing gear roller box 7 is coaxially connected with the output terminal of feed water pump (or other pumps) 6, and the output terminal of timing gear roller box 7 is coaxially connected with the input end of 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, drag coaxial feed water pump (or other pump) 6 rotates simultaneously, 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, and because industrial frequency generator 8 is coaxially connected with front-mounted pump 10, industrial frequency generator 8 also rotates.Now the Partial Power of small turbine 1 is output as power frequency electricity, supplies with Chang Neihuo factory external power grid.During the work of feed water pump group, first front-mounted pump (or other pumps) 10 can pressurize for the first time to feedwater, and then feed water pump (or other pumps) 6 can pressurize for the second time to feedwater.By regulating the output of industrial frequency generator 8 become large or diminish, the load of controlling 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 controlling feed water pump group (or other pump groups) diminishes or becomes greatly, to meet different working condition requirements.When if between industrial frequency generator 8 output voltages and electrical network, voltage is different, transformer 9 can be set between industrial frequency generator 8 and electrical network, by transformer 9, can, by industrial frequency generator 8 electricity transformations to the voltage mating with electrical network, realize industrial frequency generator 8 electricity are supplied with to Chang Neihuo factory external power grid.
System of the present utility model both can be by feed water pump group rotating speed adjusting to meet 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 Chang Neihuo factory external power grid, if voltage is different between the electricity that industrial frequency generator sends and electrical network, can, by transformer is set, electricity transformation be arrived to the voltage mating with electrical network.
Compared with prior art, the utlity model has following major advantage:
(1) by the common aperture of back pressure type small turbine modulating valve in current 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 matches of driving arrangement power demand.
(2) more than the operational efficiency of back pressure type small turbine of the present utility model can improve 5%-10%, save mark coal 1000MW unit year more than 5000 tons for every, significantly reduce operating cost, and reach the comprehensive benefit that reduces pollutant emission.
(3) system of the present utility model makes full use of the acting ability of small turbine, by industrial frequency generator, generates electricity, and every 1000MW unit can externally be powered 7,500 ten thousand kilowatts every year, and direct economy income is more than 15,000,000 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 except there being special instruction, the feature disclosing is only the general example of equalization or similar features.
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 (9)
1. the back pressure type small turbine of industrial frequency generator speed governing drives a 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 timing gear roller box are coaxially connected;
Described timing gear roller box is configured between described back pressure type small turbine and described industrial frequency generator, thereby the rotation of described back pressure type small turbine drives described industrial frequency generator to rotate 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 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 is connected 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 is connected with the axle head of a side of described back pressure type small turbine via described timing gear roller box, and the input end of described feed water pump is connected 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 is connected with described feedwater delivery side of pump via described timing gear roller box, and the input end of described feed water pump is connected 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 between described feed water pump and described front-mounted pump and be connected with described feed water pump via described timing gear roller box, or 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 constant-speed ratio gear-box, and the input end of described front-mounted pump is connected with the output terminal of described constant-speed ratio gear-box, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494158.XU CN203394698U (en) | 2013-08-13 | 2013-08-13 | Feed pump system driven by back pressure-type small steam turbine for speed regulation of power frequency generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320494158.XU CN203394698U (en) | 2013-08-13 | 2013-08-13 | Feed pump system driven by back pressure-type small steam turbine for speed regulation of power frequency generator |
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| CN203394698U true CN203394698U (en) | 2014-01-15 |
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| CN201320494158.XU Expired - Fee Related CN203394698U (en) | 2013-08-13 | 2013-08-13 | Feed pump system driven by back pressure-type small steam turbine for speed regulation of power frequency generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362770A (en) * | 2013-08-13 | 2013-10-23 | 中国电力工程顾问集团华东电力设计院 | System and method of back pressure type small steam turbine driving water supply pump for power frequency electric generator speed adjustment |
-
2013
- 2013-08-13 CN CN201320494158.XU patent/CN203394698U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362770A (en) * | 2013-08-13 | 2013-10-23 | 中国电力工程顾问集团华东电力设计院 | System and method of back pressure type small steam turbine driving water supply pump for power frequency electric generator speed adjustment |
| CN103362770B (en) * | 2013-08-13 | 2016-08-10 | 中国电力工程顾问集团华东电力设计院有限公司 | The back pressure type small turbine of industrial frequency generator speed governing drives feed-water pump and method |
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Granted publication date: 20140115 |