CN104775861A - Pumped storage thermodynamic system of thermal power plant - Google Patents
Pumped storage thermodynamic system of thermal power plant Download PDFInfo
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- CN104775861A CN104775861A CN201510233616.8A CN201510233616A CN104775861A CN 104775861 A CN104775861 A CN 104775861A CN 201510233616 A CN201510233616 A CN 201510233616A CN 104775861 A CN104775861 A CN 104775861A
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Abstract
The invention relates to a pumped storage thermodynamic system of a thermal power plant. Specifically, the pumped storage thermodynamic system comprises a water feeding heater, a deoxidizing heater, a condensed water heater and a hot water storage device. The hot water storage device is arranged in the thermodynamic system, so that a part of drained water flowing out of a water system is stored in the hot water storage device, under the working condition that unit load needs adjusting, the drained water is supplemented to the thermodynamic system, and the effect of increasing the unit load or adjusting the frequency can be achieved. Throttling loss is avoided, impact on an original thermodynamic system is small, and the advantages in the aspects of operation economy and safety are remarkable.
Description
Technical field
The present invention relates to the field such as power grid frequency modulation and thermal power generation, relate to a kind of thermal power plant pumped storage thermodynamic system particularly.
Background technique
In order to ensure the safety and economic operation of electrical network, improve the level of control of the quality of power supply and mains frequency, the frequency fluctuation that rapid elimination causes due to network load change, electrical network generally all requires that the Turbo-generator Set networked possesses the ability of primary frequency modulation, and namely requiring Turbo-generator Set to possess increases or reduce a certain amount of ability of exerting oneself with quick responsive electricity grid frequency decrease or rising in the short period of time.
The primary frequency modulation technology of current thermoelectricity Turbo-generator Set mainly comprises: steam turbine main inlet throttle-stop valve throttling frequency modulation, filling valve frequency modulation, water of condensation frequency modulation and feedwater frequency modulation.
Fig. 1 is the Turbo-generator Set schematic diagram adopting flow restriction control, wherein, main steam shut-off valve standard-sized sheet, the single-conversion of unit is all realized by the aperture of change steam turbine main steam servo valve, in order to ensure primary frequency function, main steam servo valve can not 100% standard-sized sheet, must retain the aperture (corresponding valve only opens 95% ~ 45%) of 5% ~ 55%.When mains frequency is too high, the control system of unit suitably turns down main steam servo valve immediately, reduces the steam flow entering steam turbine, reduces unit output electric power grid frequency stabilization.When mains frequency is too low, the control system of unit suitably opens large main steam servo valve immediately, increases the steam flow entering steam turbine, increases unit output electric power grid frequency stabilization.
In this regulative mode, the steam of full flow forms intrinsic restriction loss by during main steam servo valve, thus reduces the efficiency of whole Turbo-generator Set, and this loss all will exist within the unit whole service time.
Fig. 2 is the Turbo-generator Set schematic diagram adopting filling valve regulation, wherein, main steam shut-off valve and main steam servo valve standard-sized sheet, when unit normally runs, filling valve is in closed condition, and when mains frequency is too high, the control system of unit suitably turns down main steam servo valve immediately, reduce the steam flow entering steam turbine, reduce unit output electric power grid frequency stabilization.When mains frequency is too low, the control system of unit suitably opens filling valve immediately, making part initial steam by directly entering steam turbine intergrade after the throttling of filling valve, to increase flow area and steam flow, thus reaching the object increasing unit output electric power grid frequency stabilization.
In this regulative mode, there is larger restriction loss, greatly increase the hear rate of unit, reduce unit whole efficiency, and steam flow produces larger disturbance in the steam steam flow countercylinder filled into, can increase the vibration of steam turbine, this vibrated senior general jeopardizes unit safety operation.
Water of condensation regulative mode: the amount of drawing gas of low-pressure heater depends on condensing water flow, when mains frequency is too high, the control system of unit suitably increases the condensing capacity entering low-pressure heater immediately, the amount of drawing gas of low-pressure heater also increases thereupon, the steam flow entering steam turbine reduces, and unit output reduces mains frequency is stablized.When mains frequency is too low, the control system of unit suitably reduces the condensing capacity entering low-pressure heater immediately, reduces the amount of drawing gas of low-pressure heater, thus makes more steam enter steam turbine, increases unit output and carrys out electric power grid frequency stabilization.
Feedwater regulative mode: the amount of drawing gas of high-pressure heater depends on feedwater flow, when mains frequency is too high, the control system of unit suitably increases the confluent entering high-pressure heater immediately, the amount of drawing gas of high-pressure heater also increases thereupon, the steam flow entering steam turbine reduces, and unit output reduces mains frequency is stablized.When mains frequency is too low, the control system of unit suitably reduces the feedwater flow entering high-pressure heater immediately, reduces the amount of drawing gas of high-pressure heater, thus makes more steam enter steam turbine, increases unit output and carrys out electric power grid frequency stabilization.
These two kinds of mode of frequency regulations all realize the object of frequency modulation by the mode changing thermodynamic system extraction flow, therefore larger to the impact of original thermodynamic system.
Generally speaking, the major defect that existing primary frequency modulation technology exists shows: 1) there is restriction loss for reaching frequency modulation object; 2) there is larger thermal shock to thermodynamic system in frequency-modulating process.These shortcomings all can give running efficiency of system, operation stability, Economy, Security brings negative effect.
In sum, related domain in the urgent need to developing a kind of fired power generating unit primary frequency modulation technology that is novel, more economic security, while guaranteeing unit overall operation efficiency, to reduce the impact to thermodynamic system.
Summary of the invention
One is the object of the present invention is to provide to there is not restriction loss, and also less to the impact of original thermodynamic system, there is thermal power plant's pumped storage thermodynamic system of clear superiority in performance driving economy and Security.
A first aspect of the present invention, provide a kind of thermal power plant pumped storage thermodynamic system, described system comprises:
Feed water preheater, described feed water preheater is connected with the extraction line of high pressure cylinder;
Deaerating heater, described deaerating heater is connected with the extraction line of intermediate cylinder;
Condensation water heater, described condensation water heater is connected with the extraction line of low pressure cylinder; With
Hot water reservoir, described hot water reservoir is provided with hydrophobic entrance, steam inlet and hot water outlet, described hydrophobic entrance is connected by drain water piping A with the hydrophobic outlet of described feed water preheater, described steam inlet is connected by pipeline B with the steam (vapor) outlet of described feed water preheater, and described hot water outlet is connected by pipeline C with the water source import of described deaerating heater.
In another preference, the hydrophobic outlet of the feed water preheater be connected with the hydrophobic entrance of described hot water reservoir is independently.
In another preference, the drain water piping A connecting the hydrophobic entrance of described hot water reservoir and the hydrophobic outlet of described feed water preheater is provided with one-way valve.
In another preference, the steam (vapor) outlet of the feed water preheater be connected with the steam inlet of described hot water reservoir is independently.
In another preference, the pipeline B connecting the steam inlet of described hot water reservoir and the steam (vapor) outlet of described feed water preheater is provided with two-way valve.
In another preference, the water source import of the deaerating heater be connected with the hot water outlet of described hot water reservoir is independently.
In another preference, the pipeline C connecting the hot water outlet of described hot water reservoir and the water source import of described deaerating heater is provided with one-way valve.
In another preference, described system is also provided with drain water piping D, and described drain water piping D is used for the hydrophobic outlet of feed water preheater to be connected with the water source import of described deaerating heater.
In another preference, the hydrophobic outlet of the described feed water preheater be connected with described drain water piping A and the hydrophobic outlet of described feed water preheater be connected with described drain water piping D are independently.
In another preference, the water source import of the described deaerating heater be connected with described drain water piping C and the water source import of described deaerating heater be connected with described drain water piping D are independently.
In another preference, described drain water piping D is provided with one-way valve.
In another preference, described feed water preheater, deaerating heater and/or condensation water heater are single-stage or multiple stage heater.
In another preference, described feed water preheater, deaerating heater and/or condensation water heater are multiple stage heater, and concrete progression is not by the restriction of embodiment in the present invention.
In another preference, described multiple stage heater is preferably 2-10 level heater, is more preferably 7-9 level heater.
In another preference, described feed water preheater, deaerating heater and/or condensation water heater are single-row or multiple row heater.
In another preference, described feed water preheater, deaerating heater and/or condensation water heater are multiple row heaters, and concrete columns is not by the restriction of embodiment in the present invention.
In another preference, described multiple row heater is preferably 2-3 row heater, is more preferably 2 row heaters.
In another preference, described feed water preheater is preferably chopped-off head feed water preheater.
In another preference, the hydrophobic of described feed water preheater can extract from other feed water preheaters.
In another preference, described feed water preheater is from the machine unit.
In another preference, described feed water preheater is from adjacent unit.
In another preference, described hydrophobic outlet is arranged on the hydrophobic section of feed water preheater, is preferably arranged on the hydrophobic cooling section of feed water preheater.
In another preference, extraction amount hydrophobic in described feed water preheater is 0 ~ 100%, is preferably 100%.
In another preference, when needs improve mains frequency, the water in described hot water reservoir is transported to deaerating heater;
When needs reduce mains frequency, be hydrophobicly delivered to hot water reservoir by producing in described feed water preheater.
In another preference, can synchronously carry out to described deaerating heater from feed water preheater conveying is hydrophobic to described hot water reservoir with from the exclusion of described hot water reservoir is hydrophobic.
In another preference, when needs improve mains frequency, the hydrophobic amount being delivered to described hot water reservoir from feed water preheater is less than the hydrophobic amount from described hot water reservoir exclusion to described deaerating heater.
In another preference, when needs reduce mains frequency, the hydrophobic amount being delivered to described hot water reservoir from feed water preheater is greater than the hydrophobic amount from described hot water reservoir exclusion to described deaerating heater.
A second aspect of the present invention, provides a kind of Turbo-generator Set, the system of described generator set configuration described in first aspect present invention.
A third aspect of the present invention, provides a kind of method utilizing the thermal power plant's pumped storage thermodynamic system described in first aspect present invention to regulate mains frequency, comprises step:
When needs improve mains frequency, hydrophobic in hot water reservoir described in the pumped storage thermodynamic system described in first aspect present invention is delivered to deaerating heater; Or
When needs reduce mains frequency, be hydrophobicly delivered to hot water reservoir by producing in feed water preheater described in the pumped storage thermodynamic system described in first aspect present invention.
Should be understood that within the scope of the present invention, above-mentioned each technical characteristics of the present invention 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, tiredly no longer one by one to state at this.
Reference character:
M: steam turbine
G: generator
A1: main steam shut-off valve
A2: main steam servo valve
A3: filling valve
1: feed water preheater
2: deaerating heater
3: condensation water heater
4: hot water reservoir
A: hydrophobic entrance
B: steam inlet
C: hot water outlet
D: hydrophobic outlet
E: steam (vapor) outlet
F: water source import
Accompanying drawing explanation
Fig. 1 is the Turbo-generator Set schematic diagram adopting flow restriction control.
Fig. 2 is the Turbo-generator Set schematic diagram adopting filling valve regulation.
Fig. 3 is the schematic diagram of the pumped storage thermodynamic system flow process of the embodiment of the present invention 1 the machine heater condensate.
Fig. 4 is the schematic diagram of the pumped storage thermodynamic system flow process of the adjacent machine heater condensate of the embodiment of the present invention 2.
Fig. 5 is the schematic diagram of the pumped storage thermodynamic system flow process of comparative example 1 the machine oxygen-eliminating device water storage of the present invention.
Fig. 6 is the schematic diagram of the pumped storage thermodynamic system flow process that comparative example 2 the machine heat setting of the present invention bears water.
Embodiment
The present inventor studies through a large amount of Thermodynamic Simulations, be surprised to find that and hot water reservoir is set by the special position in thermodynamic system, the part hydrophobic distributed from water system is stored in hot water reservoir, needing the operating mode regulating unit load, add in thermodynamic system by hydrophobic, the effect increasing unit load or frequency modulation can be played.Present invention, avoiding restriction loss that frequency modulation brings and steam turbine vibrates, improve operational efficiency and the Security of steam turbine, have energy saving economy concurrently and improve the benefit of safety in operation, the impact of original thermodynamic system is also significantly reduced simultaneously.On this basis, inventor completes the present invention.
Term
As used herein, term " thermal power plant of the present invention pumped storage thermodynamic system ", " thermal power plant's pumped storage thermodynamic system " or " thermodynamic system " are used interchangeably, and all refer to store by extracting thermodynamic system hot water the system that energy regulates load or frequency modulation.
As used herein, term " feed water preheater ", also known as high-pressure heater, is called for short high adding, is generally multistage, and common is 3 grades, is usually numbered by extraction pressure that 1# highly adds, 2# is high adds add high with 3# from high to low.
As used herein, term " condensation water heater ", also known as low-pressure heater, is called for short low adding, is generally multistage, and common is 4 grades, is usually numbered that 5# lowly adds from high to low by extraction pressure, 6# lowly adds, 7# is low adds add low with 8#.
As used herein, term " deaerating heater " or " oxygen-eliminating device " are used interchangeably, all refer to usually between Gao Jia and low add between heater.
Thermal power plant's pumped storage thermodynamic system
The invention provides a kind of thermal power plant pumped storage thermodynamic system, described system comprises:
Feed water preheater, described feed water preheater is connected with the extraction line of high pressure cylinder;
Deaerating heater, described deaerating heater is connected with the extraction line of intermediate cylinder;
Condensation water heater, described condensation water heater is connected with the extraction line of low pressure cylinder; With
Hot water reservoir, described hot water reservoir is provided with hydrophobic entrance, steam inlet and hot water outlet, described hydrophobic entrance is connected by drain water piping A with the hydrophobic outlet of described feed water preheater, described steam inlet is connected by pipeline B with the steam (vapor) outlet of described feed water preheater, and described hot water outlet is connected by pipeline C with the water source import of described deaerating heater.
In the present invention, the hydrophobic outlet of the feed water preheater be connected with the hydrophobic entrance of described hot water reservoir is independently.
In another preference, the drain water piping A connecting the hydrophobic entrance of described hot water reservoir and the hydrophobic outlet of described feed water preheater is provided with one-way valve.
In the present invention, the steam (vapor) outlet of the feed water preheater be connected with the steam inlet of described hot water reservoir is independently.
In another preference, the pipeline B connecting the steam inlet of described hot water reservoir and the steam (vapor) outlet of described feed water preheater is provided with two-way valve.
In the present invention, the water source import of the deaerating heater be connected with the hot water outlet of described hot water reservoir is independently.
In another preference, the pipeline C connecting the hot water outlet of described hot water reservoir and the water source import of described deaerating heater is provided with one-way valve.
In the present invention, described system is also provided with drain water piping D, and described drain water piping D is used for the hydrophobic outlet of feed water preheater to be connected with the water source import of described deaerating heater.
In another preference, the hydrophobic outlet of the described feed water preheater be connected with described drain water piping A and the hydrophobic outlet of described feed water preheater be connected with described drain water piping D are independently.
In another preference, the water source import of the described deaerating heater be connected with described drain water piping C and the water source import of described deaerating heater be connected with described drain water piping D are independently.
In another preference, described drain water piping D is provided with one-way valve.
Usually, described feed water preheater, deaerating heater and/or condensation water heater are single-stage or multiple stage heater.
In another preference, described feed water preheater, deaerating heater and/or condensation water heater are multiple stage heater, and concrete progression is not by the restriction of embodiment in the present invention.
In another preference, described multiple stage heater is preferably 2-10 level heater, is more preferably 7-9 level heater.
Usually, described feed water preheater, deaerating heater and/or condensation water heater are single-row or multiple row heater.
In another preference, described feed water preheater, deaerating heater and/or condensation water heater are multiple row heaters, and concrete columns is not by the restriction of embodiment in the present invention.
In another preference, described multiple row heater is preferably 2-3 row heater, is more preferably 2 row heaters.
In another preference, described feed water preheater is preferably chopped-off head feed water preheater.
In another preference, the hydrophobic of described feed water preheater can extract from other feed water preheaters.
In another preference, described feed water preheater is from the machine unit.
In another preference, described feed water preheater is from adjacent unit.
In the present invention, position and the hydrophobic extraction amount of hydrophobic outlet are not particularly limited, and in very large range can adjust according to practical implementation.
In another preference, described hydrophobic outlet is arranged on the hydrophobic section of feed water preheater, is preferably arranged on the hydrophobic cooling section of feed water preheater.
In another preference, extraction amount hydrophobic in described feed water preheater is 0 ~ 100%, is preferably 100%.
In the present invention, when needs improve mains frequency, the water in described hot water reservoir is transported to deaerating heater;
When needs reduce mains frequency, be hydrophobicly delivered to hot water reservoir by producing in described feed water preheater.
In another preference, can synchronously carry out to described deaerating heater from feed water preheater conveying is hydrophobic to described hot water reservoir with from the exclusion of described hot water reservoir is hydrophobic.
In another preference, when needs improve mains frequency, the hydrophobic amount being delivered to described hot water reservoir from feed water preheater is less than the hydrophobic amount from described hot water reservoir exclusion to described deaerating heater.
In another preference, when needs reduce mains frequency, the hydrophobic amount being delivered to described hot water reservoir from feed water preheater is greater than the hydrophobic amount from described hot water reservoir exclusion to described deaerating heater.
Application
Present invention also offers a kind of Turbo-generator Set, the system described in described generator set configuration.
Present invention also offers a kind of method utilizing described thermal power plant's pumped storage thermodynamic system to regulate mains frequency, comprise step:
When needs improve mains frequency, hydrophobic in hot water reservoir described in described pumped storage thermodynamic system is delivered to deaerating heater; Or
When needs reduce mains frequency, be hydrophobicly delivered to hot water reservoir by producing in feed water preheater described in described pumped storage thermodynamic system.
Compared with prior art, the present invention has following major advantage:
(1) there is not restriction loss, there is better running efficiency of system;
(2) less to the impact of original thermodynamic system, there is more excellent operation stability;
(3) there is higher performance driving economy and Security.
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, the usually conveniently conditioned disjunction condition of advising according to manufacturer.Unless otherwise indicated, otherwise percentage and number calculate by weight.
Unless otherwise defined, all specialties used in literary composition and scientific words and one skilled in the art the meaning be familiar with identical.In addition, any method similar or impartial to described content and material all can be applicable in the inventive method.The use that better implementation methods described in literary composition and material only present a demonstration.
The pumped storage thermodynamic system that embodiment 1 the machine feed water preheater is hydrophobic
Fig. 3 illustrates the pumped storage thermodynamic system flow process of the machine heater condensate, specific as follows: when mains frequency is too high, when needing to reduce unit output, the hydrophobic layout by existing thermodynamic system of a part for chopped-off head feed water preheater (3# is high to be added) enters in oxygen-eliminating device, amphiphilicity then enters in the hot water reservoir of new configuration, collect by hot water reservoir the heat that in former thermodynamic system, a part is hydrophobic, and stored.Now, reduce from the high hydrophobic flow entered oxygen-eliminating device that adds of 3#, constant for ensureing main steam flow, condensing capacity needs to increase, corresponding condensation water heater, vapour amount needed for oxygen-eliminating device heat-setting water increase, thus make to enter condensation water heater, the amount of drawing gas of oxygen-eliminating device increases, the steam flow done work in steam turbine accordingly reduces, unit output is reduced, to meet the requirement of power grid frequency modulation.When mains frequency is too low, when needing to increase unit output, pass in hot water reservoir by high for the 3# saturated vapour added, with the hydrophobic exclusion will stored in hot water reservoir in oxygen-eliminating device, the heat contained in hydrophobic also refills in former thermodynamic system simultaneously, constant for ensureing main steam flow, condensing capacity needs to reduce, the corresponding amount of drawing gas decreasing condensation water heater, oxygen-eliminating device, and the steam flow entering steam turbine acting is increased, unit output is improved, thus realizes the function of primary frequency modulation.
As can be seen here, when mains frequency is too high, this pumped storage, by the hydrophobic heat in the former thermodynamic system of hot water reservoir savings part, makes the total amount of heat input of former thermodynamic system reduce, thus output power is reduced, with the primary frequency modulation signal of responsive electricity grid.When mains frequency is too low, the hydrophobic heat stored in hot water reservoir is refilled in thermodynamic system again, to increase the total amount of heat input of system, recover unit output.
Result
Through measuring and calculating, use the pumped storage thermodynamic system of embodiment 1, compared with throttling mode of frequency regulation, often spending electric coal consumption can reduce by 0.2%, to the unit of 1 1000MW, every year can more than 2500 ton, feast-brand mark coal, and direct economic benefit more than 2,000,000 yuan.
The pumped storage thermodynamic system that embodiment 2 adjacent machine feed water preheater is hydrophobic
Fig. 4 illustrates the pumped storage thermodynamic system of adjacent machine heater condensate: extract part hydrophobic to hot water reservoir from adjacent unit high adding, when mains frequency is too low, with the saturated vapour of the machine chopped-off head Gao Jianei by the hydrophobic exclusion in hot water reservoir in the machine oxygen-eliminating device, increase the thermal source of oxygen-eliminating device, thus press extraction flow in minimizing entrance, make more steam enter low pressure (LP) cylinder acting, increase unit output, improve mains frequency.
Result
Through measuring and calculating, use the pumped storage thermodynamic system of embodiment 2, if by the system of the transfer of heat of adjacent for low parameter machine to high pressure high temperature turbosets, the utilization ratio of heat in the efficient unit of high parameter is higher, economize on coal except income except what reach frequency modulation, the income improving heat utilization ratio can also be reached.To the unit of 1 1000MW, annual total can more than 3000 ton, feast-brand mark coal, direct economic benefit more than 2,500,000 yuan.
It is different that the difference of the system shown in Fig. 3 with Fig. 4 is to extract thermal source, the parameter of corresponding extraction hot water is different, the vapour source of drawing gas of exclusion is also different, in order to reach same frequency modulation effect, the volume that different system extracts hot water is also different, accordingly, system component design, frequency modulation response time difference to some extent.Extract hot water temperature lower, the amount of stored heat that the hot water of same volume is corresponding is less, and fm capacity is relatively on the weak side, needs to extract more hot water amount to reach same frequency modulation object.
The pumped storage thermodynamic system of comparative example 1 the machine oxygen-eliminating device water storage
Fig. 5 illustrates the pumped storage thermodynamic system flow process of the machine oxygen-eliminating device water storage: when mains frequency is too high, extracts part oxygen-eliminating device water storage and is stored in hot water reservoir.Now, due to discharge reduction in oxygen-eliminating device, constant for ensureing main steam flow, need supplement a part of water of condensation, rate of water make-up is equal to pumping load, but moisturizing temperature comparatively oxygen-eliminating device water storage is low, therefore the entrance amount of drawing gas of condensation water heater, oxygen-eliminating device can be made to increase, thus reduce the steam flow entering cylinder acting, reduce unit output, reach the requirement reducing mains frequency.And when mains frequency is too low, by saturated vapour in oxygen-eliminating device, the water storage in hot water reservoir is squeezed to final stage condensation water heater (final stage low-pressure heater), increase the low high temperature heat source added of final stage, thus entrance low-pressure pumping steam amount is reduced, increase acting steam flow in steam turbine, improve unit output, to increase mains frequency.
Result
What embodiment 1 and 2 utilized is HP heater drainage, and temperature is usually more than 200 DEG C; What comparative example 1 utilized is oxygen-eliminating device water storage, typical temperature about 160 ~ 180 DEG C.The energy storage of the hot water of embodiment 1 and 2 is more, and the ability of corresponding adjustment load is strong, is the preferred version of Practical Project.
The pumped storage thermodynamic system that comparative example 2 the machine heat setting bears water
Fig. 6 illustrates the pumped storage thermodynamic system that the machine heat setting bears water: when mains frequency is too high, extract the low heat setting adding outlet of final stage to bear water, and stored by hot water reservoir, constant in order to ensure confluent, need to improve condensate pump power and supplement the water of condensation being equal to pumping load, thus through the too low condensing capacity increase adding and enter oxygen-eliminating device, low adding, increases with the oxygen-eliminating device amount of drawing gas, in steam turbine, total steam flow of acting reduces, and unit output reduces, thus meets power grid frequency modulation demand.When mains frequency is too low, the heat setting stored is born water again refill in oxygen-eliminating device in hot water reservoir, to reduce main road condensing capacity, reduce low adding and the oxygen-eliminating device amount of drawing gas, increase unit output, reach power grid frequency modulation requirement.
Result
What embodiment 1 and 2 utilized is HP heater drainage, and temperature is usually more than 200 DEG C; What comparative example 2 utilized is water of condensation, typical temperature about 140 ~ 160 DEG C.The energy storage of the hot water of embodiment 1 and 2 is more, and the ability of corresponding adjustment load is strong, is the preferred version of Practical Project.
Thermal power plant of the present invention pumped storage thermodynamic system extracts the hot water in thermodynamic system, and stored by hot water reservoir, reach the object reducing unit load, and needing the operating mode regulating unit load, hot water is added in thermodynamic system, can unit load be increased, realize the function of primary frequency modulation thus.This system not only avoid the restriction loss of main inlet throttle-stop valve throttling frequency modulation, filling valve frequency modulation technology, ensure that operational efficiency and the stability of whole Turbo-generator Set, and the impact also reduced original thermodynamic system, solve the technical barrier that existing frequency modulation technology exists.Relatively existing frequency modulation technology, pumped storage technology energy-conservation with Economy in there is obvious advantage, to the technical innovation project of newly-built Fossil Fueled Power Plant Project and existing unit, all there is good applicability.
The all documents mentioned in the present invention are quoted as a reference all in this application, are just quoted separately as a reference as each section of document.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after having read above-mentioned instruction content of the present invention.
Claims (10)
1. thermal power plant's pumped storage thermodynamic system, is characterized in that, described system comprises:
Feed water preheater, described feed water preheater is connected with the extraction line of high pressure cylinder;
Deaerating heater, described deaerating heater is connected with the extraction line of intermediate cylinder;
Condensation water heater, described condensation water heater is connected with the extraction line of low pressure cylinder; With
Hot water reservoir, described hot water reservoir is provided with hydrophobic entrance, steam inlet and hot water outlet, described hydrophobic entrance is connected by drain water piping A with the hydrophobic outlet of described feed water preheater, described steam inlet is connected by pipeline B with the steam (vapor) outlet of described feed water preheater, and described hot water outlet is connected by pipeline C with the water source import of described deaerating heater.
2. thermal power plant as claimed in claim 1 pumped storage thermodynamic system, it is characterized in that, the hydrophobic outlet of the feed water preheater be connected with the hydrophobic entrance of described hot water reservoir is independently.
3. thermal power plant as claimed in claim 1 pumped storage thermodynamic system, it is characterized in that, the steam (vapor) outlet of the feed water preheater be connected with the steam inlet of described hot water reservoir is independently.
4. thermal power plant as claimed in claim 1 pumped storage thermodynamic system, it is characterized in that, the water source import of the deaerating heater be connected with the hot water outlet of described hot water reservoir is independently.
5. thermal power plant as claimed in claim 1 pumped storage thermodynamic system, it is characterized in that, described system is also provided with drain water piping D, and described drain water piping D is used for the hydrophobic outlet of feed water preheater to be connected with the water source import of described deaerating heater.
6. thermal power plant as claimed in claim 1 pumped storage thermodynamic system, it is characterized in that, described feed water preheater, deaerating heater and/or condensation water heater are single-stage or multiple stage heater.
7. thermal power plant as claimed in claim 1 pumped storage thermodynamic system, it is characterized in that, described feed water preheater, deaerating heater and/or condensation water heater are single-row or multiple row heater.
8. thermal power plant as claimed in claim 1 pumped storage thermodynamic system, is characterized in that, when needs improve mains frequency, the water in described hot water reservoir is transported to deaerating heater;
When needs reduce mains frequency, be hydrophobicly delivered to hot water reservoir by producing in described feed water preheater.
9. a Turbo-generator Set, is characterized in that, described generator set configures system according to claim 1.
10. utilize the thermal power plant's pumped storage thermodynamic system described in claim 1 to regulate a method for mains frequency, it is characterized in that, comprise step:
When needs improve mains frequency, hydrophobic in hot water reservoir described in pumped storage thermodynamic system according to claim 1 is delivered to deaerating heater; Or
When needs reduce mains frequency, be hydrophobicly delivered to hot water reservoir by producing in feed water preheater described in pumped storage thermodynamic system according to claim 1.
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Cited By (1)
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| CN111120992A (en) * | 2019-12-05 | 2020-05-08 | 国网河北省电力有限公司电力科学研究院 | Thermal energy storage system for enhancing unit operation flexibility and peak shaving output evaluation method |
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| CN111120992A (en) * | 2019-12-05 | 2020-05-08 | 国网河北省电力有限公司电力科学研究院 | Thermal energy storage system for enhancing unit operation flexibility and peak shaving output evaluation method |
| CN111120992B (en) * | 2019-12-05 | 2022-04-12 | 国网河北省电力有限公司电力科学研究院 | Thermal energy storage system for enhancing unit operation flexibility and peak shaving output evaluation method |
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| CN104775861B (en) | 2016-06-29 |
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