CN104775861B - Thermal power plant's water-storage therrmodynamic system - Google Patents
Thermal power plant's water-storage therrmodynamic system Download PDFInfo
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Abstract
The present invention relates to a kind of thermal power plant water-storage therrmodynamic system, specifically described thermal power plant water-storage therrmodynamic system includes: feed-water heater, deaerating heater, condensation water heater and hot water reservoir.Described thermal power plant water-storage therrmodynamic system by arranging hot water reservoir in therrmodynamic system, it is stored in hot water reservoir by hydrophobic for the part distributed from water system, needing to regulate the operating mode of unit load, add in therrmodynamic system by hydrophobic, the effect increasing unit load or frequency modulation can be played, it is absent from restriction loss, and the impact of original therrmodynamic system is also less, in performance driving economy and safety, there is clear superiority.
Description
Technical field
The present invention relates to the field such as power grid frequency modulation and thermal power generation, more particularly to a kind of thermal power plant water-storage therrmodynamic system.
Background technology
In order to ensure the safety and economic operation of electrical network, improve the control level of the quality of power supply and mains frequency, eliminate rapidly the frequency fluctuation caused due to network load change, electrical network is generally desirable that the Turbo-generator Set of networking possesses the ability of primary frequency modulation, and namely requiring that Turbo-generator Set possesses increases or reduce a certain amount of exerting oneself with the down or up ability of quick responsive electricity grid frequency in the short period of time.
The primary frequency modulation technology of current thermoelectricity Turbo-generator Set specifically includes that steam turbine main inlet throttle-stop valve throttling frequency modulation, filling valve frequency modulation, condenses water 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, it is necessary to 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 big main steam servo valve immediately, increases the steam flow entering steam turbine, increases unit output electric power grid frequency stabilization.
In this regulative mode, forming intrinsic restriction loss when the steam of full flow is by main steam servo valve, thus reducing 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 is properly functioning, filling valve is closed, 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, make part initial steam by being directly entered steam turbine intergrade after the throttling of filling valve, to increase flow area and quantity of steam, thus reaching to increase the purpose of unit output electric power grid frequency stabilization.
In this regulative mode, there is bigger restriction loss, be greatly increased the heat consumption of unit, reduce unit whole efficiency, and steam flow in cylinder is produced bigger disturbance by the steam steam flow filled into, and can increase the vibration of steam turbine, this vibrated senior general jeopardizes unit safety operation.
Condense water 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 is consequently increased, the steam flow entering steam turbine reduces, and unit output reduces makes mains frequency be stabilized.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, so that more steam enters 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 is consequently increased, the steam flow entering steam turbine reduces, and unit output reduces makes mains frequency stable.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, so that more steam enters steam turbine, increases unit output and carrys out electric power grid frequency stabilization.
Both mode of frequency regulations realize the purpose of frequency modulation each through the mode changing therrmodynamic system extraction flow, therefore that the impact of original therrmodynamic system is bigger.
Sum it up, the major defect that existing primary frequency modulation technology exists shows: 1) there is restriction loss for reaching frequency modulation purpose；2) be there is bigger thermal shock by frequency-modulating process in therrmodynamic system.These shortcomings are negatively affected all can to running efficiency of system, operation stability, economy, safety.
In sum, this area is in the urgent need to developing a kind of fired power generating unit primary frequency modulation technology novel, more economic security, while guaranteeing unit overall operation efficiency, to reduce the impact to therrmodynamic system.
Summary of the invention
It is an object of the invention to provide one and be absent from restriction loss, and the impact of original therrmodynamic system is also less, there is thermal power plant's water-storage therrmodynamic system of clear superiority in performance driving economy and safety.
A first aspect of the present invention, it is provided that a kind of thermal power plant water-storage therrmodynamic system, described system includes:
Feed-water heater, described feed-water heater 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 heater, described steam inlet is connected by pipeline B with the steam (vapor) outlet of described feed-water heater, 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 heater being connected with the hydrophobic entrance of described hot water reservoir is independent.
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 heater is provided with check valve.
In another preference, the steam (vapor) outlet of the feed-water heater being connected with the steam inlet of described hot water reservoir is independent.
In another preference, the pipeline B connecting the steam inlet of described hot water reservoir and the steam (vapor) outlet of described feed-water heater is provided with two-way valve.
In another preference, the water source import of the deaerating heater being connected with the hot water outlet of described hot water reservoir is independent.
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 check valve.
In another preference, described system is additionally provided with drain water piping D, described drain water piping D for the hydrophobic outlet of feed-water heater being connected with the water source import of described deaerating heater.
In another preference, hydrophobic outlet with the described drain water piping A described feed-water heater being connected and be independent with the hydrophobic outlet of the described drain water piping D described feed-water heater being connected.
In another preference, water source import with the described drain water piping C described deaerating heater being connected and be independent with the water source import of the described drain water piping D described deaerating heater being connected.
In another preference, described drain water piping D is provided with check valve.
In another preference, described feed-water heater, deaerating heater and/or condensation water heater are single-stage or multiple stage heater.
In another preference, described feed-water heater, deaerating heater and/or condensation water heater are multiple stage heater, and concrete progression is not by the restriction of detailed description of the invention in the present invention.
In another preference, described multiple stage heater is preferably 2-10 level heater, more preferably 7-9 level heater.
In another preference, described feed-water heater, deaerating heater and/or condensation water heater are single-row or multiple row heater.
In another preference, described feed-water heater, deaerating heater and/or condensation water heater are multiple row heaters, and concrete columns is not by the restriction of detailed description of the invention in the present invention.
In another preference, described multiple row heater is preferably 2-3 row heater, more preferably 2 row heaters.
In another preference, described feed-water heater is preferably chopped-off head feed-water heater.
In another preference, the hydrophobic of described feed-water heater can extract from other feed-water heaters.
In another preference, described feed-water heater is from the machine unit.
In another preference, described feed-water heater is from adjacent unit.
In another preference, described hydrophobic outlet is arranged on the hydrophobic section of feed-water heater, it is preferable that be arranged on the hydrophobic cooling section of feed-water heater.
In another preference, extraction amount hydrophobic in described feed-water heater is 0～100%, it is preferred that be 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, hydrophobic it is delivered to hot water reservoir by described feed-water heater produces.
In another preference, carry hydrophobic to described hot water reservoir from feed-water heater and can be synchronously performed from described hot water reservoir hydrophobic to the described deaerating heater of exclusion.
In another preference, when needs improve mains frequency, it is delivered to the hydrophobic amount of described hot water reservoir less than the hydrophobic amount from the exclusion of described hot water reservoir to described deaerating heater from feed-water heater.
In another preference, when needs reduce mains frequency, it is delivered to the hydrophobic amount of described hot water reservoir more than the hydrophobic amount from the exclusion of described hot water reservoir to described deaerating heater from feed-water heater.
A second aspect of the present invention, it is provided that a kind of Turbo-generator Set, described generating set configuration system described in first aspect present invention.
A third aspect of the present invention, it is provided that a kind of method that thermal power plant's water-storage therrmodynamic system utilized described in first aspect present invention regulates mains frequency, including step:
When needs improve mains frequency, hydrophobic in hot water reservoir described in the water-storage therrmodynamic system described in first aspect present invention is delivered to deaerating heater；Or
When needs reduce mains frequency, hydrophobic it is delivered to hot water reservoir by feed-water heater described in the water-storage therrmodynamic system described in first aspect present invention produces.
Should be understood that within the scope of the present invention, above-mentioned each technical characteristic of the present invention and can combining mutually between specifically described each technical characteristic in below (eg embodiment), thus constituting new or preferred technical scheme.As space is limited, tired no longer one by one state at this.
Accompanying drawing labelling:
M: steam turbine
G: electromotor
A1: main steam shut-off valve
A2: main steam servo valve
A3: filling valve
1: feed-water heater
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 water-storage therrmodynamic system flow process of the embodiment of the present invention 1 the machine heater condensate.
Fig. 4 is the schematic diagram of the water-storage therrmodynamic 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 water-storage therrmodynamic 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 water-storage therrmodynamic system flow process that comparative example 2 the machine heat setting of the present invention bears water.
Detailed description of the invention
The present inventor studies through substantial amounts of Thermodynamic Simulation, it is surprised to find that and hot water reservoir is set by the ad-hoc location in therrmodynamic system, it is stored in hot water reservoir by hydrophobic for the part distributed from water system, needing to regulate the operating mode of unit load, add in therrmodynamic system by hydrophobic, it is possible to play the effect increasing unit load or frequency modulation.Present invention, avoiding restriction loss and steam turbine vibration that frequency modulation brings, improve operational efficiency and the safety of steam turbine, have energy saving economy concurrently and improve the benefit of safety in operation, the impact of original therrmodynamic system being significantly reduced simultaneously.On this basis, inventor completes the present invention.
Term
As used herein, term " thermal power plant of the present invention water-storage therrmodynamic system ", " thermal power plant's water-storage therrmodynamic system " or " therrmodynamic system " are used interchangeably, and refer both to store energy by extraction therrmodynamic system hot water and regulate the system of load or frequency modulation.
As used herein, term " feed-water heater ", also known as high-pressure heater, it is called for short height and adds, be generally multistage, common is 3 grades, is generally numbered by extraction pressure that 1# height adds, 2# height adds and adds with 3# height from high to low.
As used herein, term " condensation water heater ", also known as low-pressure heater, it is called for short low adding, is generally multistage, common is 4 grades, is generally numbered by extraction pressure that 5# low adds, 6# low adds, 7# is low adds add low with 8# from high to low.
As used herein, term " deaerating heater " or " oxygen-eliminating device " are used interchangeably, refer both to generally between Gao Jia and low add between heater.
Thermal power plant's water-storage therrmodynamic system
The invention provides a kind of thermal power plant water-storage therrmodynamic system, described system includes:
Feed-water heater, described feed-water heater 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 heater, described steam inlet is connected by pipeline B with the steam (vapor) outlet of described feed-water heater, 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 heater being connected with the hydrophobic entrance of described hot water reservoir is independent.
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 heater is provided with check valve.
In the present invention, the steam (vapor) outlet of the feed-water heater being connected with the steam inlet of described hot water reservoir is independent.
In another preference, the pipeline B connecting the steam inlet of described hot water reservoir and the steam (vapor) outlet of described feed-water heater is provided with two-way valve.
In the present invention, the water source import of the deaerating heater being connected with the hot water outlet of described hot water reservoir is independent.
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 check valve.
In the present invention, described system is additionally provided with drain water piping D, described drain water piping D for the hydrophobic outlet of feed-water heater being connected with the water source import of described deaerating heater.
In another preference, hydrophobic outlet with the described drain water piping A described feed-water heater being connected and be independent with the hydrophobic outlet of the described drain water piping D described feed-water heater being connected.
In another preference, water source import with the described drain water piping C described deaerating heater being connected and be independent with the water source import of the described drain water piping D described deaerating heater being connected.
In another preference, described drain water piping D is provided with check valve.
Generally, described feed-water heater, deaerating heater and/or condensation water heater are single-stage or multiple stage heater.
In another preference, described feed-water heater, deaerating heater and/or condensation water heater are multiple stage heater, and concrete progression is not by the restriction of detailed description of the invention in the present invention.
In another preference, described multiple stage heater is preferably 2-10 level heater, more preferably 7-9 level heater.
Generally, described feed-water heater, deaerating heater and/or condensation water heater are single-row or multiple row heater.
In another preference, described feed-water heater, deaerating heater and/or condensation water heater are multiple row heaters, and concrete columns is not by the restriction of detailed description of the invention in the present invention.
In another preference, described multiple row heater is preferably 2-3 row heater, more preferably 2 row heaters.
In another preference, described feed-water heater is preferably chopped-off head feed-water heater.
In another preference, the hydrophobic of described feed-water heater can extract from other feed-water heaters.
In another preference, described feed-water heater is from the machine unit.
In another preference, described feed-water heater 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 be adjusted according to practical implementation.
In another preference, described hydrophobic outlet is arranged on the hydrophobic section of feed-water heater, it is preferable that be arranged on the hydrophobic cooling section of feed-water heater.
In another preference, extraction amount hydrophobic in described feed-water heater is 0～100%, it is preferred that be 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, hydrophobic it is delivered to hot water reservoir by described feed-water heater produces.
In another preference, carry hydrophobic to described hot water reservoir from feed-water heater and can be synchronously performed from described hot water reservoir hydrophobic to the described deaerating heater of exclusion.
In another preference, when needs improve mains frequency, it is delivered to the hydrophobic amount of described hot water reservoir less than the hydrophobic amount from the exclusion of described hot water reservoir to described deaerating heater from feed-water heater.
In another preference, when needs reduce mains frequency, it is delivered to the hydrophobic amount of described hot water reservoir more than the hydrophobic amount from the exclusion of described hot water reservoir to described deaerating heater from feed-water heater.
Application
Present invention also offers a kind of Turbo-generator Set, the system that the configuration of described generating set is described.
Present invention also offers a kind of method utilizing described thermal power plant's water-storage therrmodynamic system to regulate mains frequency, including step:
When needs improve mains frequency, hydrophobic in hot water reservoir described in described water-storage therrmodynamic system is delivered to deaerating heater；Or
When needs reduce mains frequency, hydrophobic it is delivered to hot water reservoir by feed-water heater described in described water-storage therrmodynamic system produces.
Compared with prior art, the present invention has following major advantage:
(1) it is absent from restriction loss, there is running efficiency of system more preferably；
(2) impact of original therrmodynamic system is less, there is more excellent operation stability；
(3) there is higher performance driving economy and safety.
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention.The experimental technique of unreceipted actual conditions in the following example, generally conventionally condition or according to manufacturer it is proposed that condition.Unless otherwise indicated, otherwise percentage ratio and number are calculated by weight.
Unless otherwise defined, the same meaning that all specialties used in literary composition are familiar with one skilled in the art with scientific words.Additionally, any method similar or impartial to described content and material all can be applicable in the inventive method.The use that preferably implementation described in literary composition and material only present a demonstration.
The water-storage therrmodynamic system that embodiment 1 the machine feed-water heater is hydrophobic
Fig. 3 illustrates the water-storage therrmodynamic 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 therrmodynamic system of a part for chopped-off head feed-water heater (3# height adds) enters in oxygen-eliminating device, amphiphilicity then enters in newly configured hot water reservoir, collect a part of hydrophobic heat in former therrmodynamic system by hot water reservoir, and stored.Now, add the hydrophobic flow entered oxygen-eliminating device to reduce from 3# height, constant for ensureing main steam flow, condensing capacity needs to increase, vapour amount needed for corresponding condensation water heater, oxygen-eliminating device heat-setting water increases, so that entering the amount of the drawing gas increase of condensation water heater, oxygen-eliminating device, in steam turbine, the quantity of steam of acting reduces accordingly, 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, passing in hot water reservoir by the saturated vapor that 3# height adds, with in the hydrophobic exclusion that will store in hot water reservoir to oxygen-eliminating device, the heat contained in hydrophobic also refills in former therrmodynamic system simultaneously, constant for ensureing main steam flow, condensing capacity needs to reduce, and decreases the amount of drawing gas of condensation water heater, oxygen-eliminating device accordingly, makes the quantity of steam that entrance steam turbine does work increase, unit output is improved, thus realizing 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 hot water reservoir savings former therrmodynamic system of part, makes the total amount of heat input of former therrmodynamic system reduce, so that output reduces, with the primary frequency modulation signal of responsive electricity grid.When mains frequency is too low, the hydrophobic heat stored again being refilled in therrmodynamic system in hot water reservoir, the total amount of heat to increase system inputs, and recovers unit output.
Result
Through measuring and calculating, use embodiment 1 water-storage therrmodynamic system, with throttling mode of frequency regulation compared with, often degree electricity coal consumption can reduce by 0.2%, the unit to 1 1000MW, every year can more than 2500 ton of feast-brand mark coal, direct economic benefit more than 2,000,000 yuan.
The water-storage therrmodynamic system that the adjacent machine feed-water heater of embodiment 2 is hydrophobic
Fig. 4 illustrates the water-storage therrmodynamic system of adjacent machine heater condensate: add extraction part from adjacent unit height hydrophobic to hot water reservoir, when mains frequency is too low, with the saturated vapor of the machine chopped-off head Gao Jianei by the hydrophobic exclusion in hot water reservoir to the machine oxygen-eliminating device, increase the thermal source of oxygen-eliminating device, thus reducing pressure extraction flow in entrance, make more steam enter low pressure (LP) cylinder acting, increase unit output, improve mains frequency.
Result
Through measuring and calculating, using the water-storage therrmodynamic system of embodiment 2, if the heat of low parameter neighbour's machine is transferred to the system of high pressure high temperature turbosets, heat utilization rate in the efficient unit of high parameter is higher, economize on coal except income except what reach frequency modulation, moreover it is possible to reach to improve the income of heat utilization ratio.Unit to 1 1000MW, annual amount to can more than 3000 ton of 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 and Fig. 4 is in that to extract thermal source, the corresponding parameter extracting 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, the component design of system, frequency modulation response time difference to some extent.Extracting hot water temperature more low, the amount of stored heat that the hot water of same volume is corresponding is more little, and fm capacity is relatively on the weak side, it is necessary to extract more hot water amount to reach same frequency modulation purpose.
The water-storage therrmodynamic system of comparative example 1 the machine oxygen-eliminating device water storage
Fig. 5 illustrates the water-storage therrmodynamic 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 to supplement a part condense water, rate of water make-up is equal to pump-out, but moisturizing temperature relatively oxygen-eliminating device water storage is low, therefore can make condensation water heater, the entrance amount of drawing gas of oxygen-eliminating device increases, thus reducing the steam flow entering cylinder acting, reducing unit output, reducing the requirement of mains frequency.And when mains frequency is too low, by saturated vapor 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, so that entrance low-pressure pumping steam amount reduces, 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 generally 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 water-storage therrmodynamic system that comparative example 2 the machine heat setting bears water
Fig. 6 illustrates the water-storage therrmodynamic 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, it is necessary to improve condensate pump power and supplement the condensation water being equal to pump-out, thus through the too low condensing capacity increase added and enter oxygen-eliminating device, low adding, increases with the oxygen-eliminating device amount of drawing gas, in steam turbine, total quantity of steam of acting reduces, and unit output reduces, thus meeting power grid frequency modulation demand.When mains frequency is too low, the heat setting stored is born water again refill to 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 generally more than 200 DEG C；What comparative example 2 utilized is condense water, 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 water-storage therrmodynamic system extracts the hot water in therrmodynamic system, and stored by hot water reservoir, reduce the purpose of unit load, and needing to regulate the operating mode of unit load, hot water is added in therrmodynamic system, unit load can be increased, be achieved in the function of primary frequency modulation.This system not only avoid the restriction loss of main inlet throttle-stop valve throttling frequency modulation, filling valve frequency modulation technology, ensure that the operational efficiency of whole Turbo-generator Set and stability, and also reduce the impact to original therrmodynamic system, solve the technical barrier that existing frequency modulation technology exists.Relatively existing frequency modulation technology, water-storage technology energy-conservation with economy in there is obvious advantage, the technical innovation project of newly-built Fossil Fueled Power Plant Project and existing unit is respectively provided with the good suitability.
The all documents mentioned in the present invention are incorporated as reference all in this application, are individually recited as reference such just as each section of document.In addition, it is to be understood that after the above-mentioned teachings having read the present invention, the present invention can be made various changes or modifications by those skilled in the art, these equivalent form of values fall within the application appended claims limited range equally.
Claims (10)
1. thermal power plant's water-storage therrmodynamic system, it is characterised in that described system includes:
Feed-water heater, described feed-water heater 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 heater, described steam inlet is connected by pipeline B with the steam (vapor) outlet of described feed-water heater, and described hot water outlet is connected by pipeline C with the water source import of described deaerating heater；
And the drain water piping A connecting the hydrophobic entrance of described hot water reservoir and the hydrophobic outlet of described feed-water heater is provided with check valve；
And 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 check valve；
And from feed-water heater carry hydrophobic to described hot water reservoir and from described hot water reservoir squeeze hydrophobic to described deaerating heater can be synchronously performed；
And when needs improve mains frequency, it is delivered to the hydrophobic amount of described hot water reservoir less than the hydrophobic amount from the exclusion of described hot water reservoir to described deaerating heater from feed-water heater；
When needs reduce mains frequency, it is delivered to the hydrophobic amount of described hot water reservoir more than the hydrophobic amount from the exclusion of described hot water reservoir to described deaerating heater from feed-water heater.
2. thermal power plant as claimed in claim 1 water-storage therrmodynamic system, it is characterised in that the hydrophobic outlet of the feed-water heater being connected with the hydrophobic entrance of described hot water reservoir is independent.
3. thermal power plant as claimed in claim 1 water-storage therrmodynamic system, it is characterised in that the steam (vapor) outlet of the feed-water heater being connected with the steam inlet of described hot water reservoir is independent.
4. thermal power plant as claimed in claim 1 water-storage therrmodynamic system, it is characterised in that the water source import of the deaerating heater being connected with the hot water outlet of described hot water reservoir is independent.
5. thermal power plant as claimed in claim 1 water-storage therrmodynamic system, it is characterised in that described system is additionally provided with drain water piping D, described drain water piping D for the hydrophobic outlet of feed-water heater being connected with the water source import of described deaerating heater.
6. thermal power plant as claimed in claim 1 water-storage therrmodynamic system, it is characterised in that described feed-water heater, deaerating heater and/or condensation water heater are single-stage or multiple stage heater.
7. thermal power plant as claimed in claim 1 water-storage therrmodynamic system, it is characterised in that described feed-water heater, deaerating heater and/or condensation water heater are single-row or multiple row heater.
8. thermal power plant as claimed in claim 1 water-storage therrmodynamic system, it is characterised in that when needs improve mains frequency, the water in described hot water reservoir is transported to deaerating heater；
When needs reduce mains frequency, hydrophobic it is delivered to hot water reservoir by described feed-water heater produces.
9. a Turbo-generator Set, it is characterised in that described generating set configuration system described in claim 1.
10. the method that thermal power plant's water-storage therrmodynamic system that a kind utilizes described in claim 1 regulates mains frequency, it is characterised in that include step:
When needs improve mains frequency, hydrophobic in hot water reservoir described in the water-storage therrmodynamic system described in claim 1 is delivered to deaerating heater；Or
When needs reduce mains frequency, hydrophobic it is delivered to hot water reservoir by feed-water heater described in the water-storage therrmodynamic system described in claim 1 produces.
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| CN201510233616.8A CN104775861B (en) | 2015-05-08 | 2015-05-08 | Thermal power plant's water-storage therrmodynamic system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041637A (en) * | 1988-10-05 | 1990-04-25 | 西屋电气公司 | Improved system for routing preseparator drains |
| US4955200A (en) * | 1989-05-17 | 1990-09-11 | Westinghouse Electric Corp. | Reheater piping and drain cooler system |
| US5140818A (en) * | 1991-05-09 | 1992-08-25 | Westinghouse Electric Corp. | Internal moisture separation cycle |
| US5442908A (en) * | 1993-01-25 | 1995-08-22 | Westinghouse Electric Corporation | Combined combustion and steam turbine power plant |
| CN103437968A (en) * | 2013-08-30 | 2013-12-11 | 华北电力大学 | Light-coal complementary heat power generation system |
-
2015
- 2015-05-08 CN CN201510233616.8A patent/CN104775861B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041637A (en) * | 1988-10-05 | 1990-04-25 | 西屋电气公司 | Improved system for routing preseparator drains |
| US4955200A (en) * | 1989-05-17 | 1990-09-11 | Westinghouse Electric Corp. | Reheater piping and drain cooler system |
| CN1047363A (en) * | 1989-05-17 | 1990-11-28 | 西屋电气公司 | Modified model reheater piping and drain cooler system |
| US5140818A (en) * | 1991-05-09 | 1992-08-25 | Westinghouse Electric Corp. | Internal moisture separation cycle |
| US5442908A (en) * | 1993-01-25 | 1995-08-22 | Westinghouse Electric Corporation | Combined combustion and steam turbine power plant |
| CN103437968A (en) * | 2013-08-30 | 2013-12-11 | 华北电力大学 | Light-coal complementary heat power generation system |
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