CN110206603A - A kind of fired power generating unit thermoelectricity decoupling system and method based on steam heating fused salt accumulation of heat - Google Patents
A kind of fired power generating unit thermoelectricity decoupling system and method based on steam heating fused salt accumulation of heat Download PDFInfo
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- CN110206603A CN110206603A CN201910406560.XA CN201910406560A CN110206603A CN 110206603 A CN110206603 A CN 110206603A CN 201910406560 A CN201910406560 A CN 201910406560A CN 110206603 A CN110206603 A CN 110206603A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/02—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for the fluid remaining in the liquid phase
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The present invention relates to a kind of fired power generating unit thermoelectricity based on steam heating fused salt accumulation of heat to decouple system and method, comprising: high temperature melting salt cellar, high-temperature melting salt pump, low-temperature molten salt tank, low-temperature molten salt pump, steam sensible heat exchanger, fused salt steam superheater, fused salt steam generator, boiler reheater, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, industrial user, oxygen-eliminating device and water pump.The beneficial effects of the present invention are: with it is existing turn down steam valve operating scheme is pressed into steam turbine compared with, steam valve restriction loss is pressed into The present invention reduces in, improves steam turbine operation security reliability；Compared with existing heat storage electric boiler peak regulation technique, steam zone is converted into the invention avoids generating high-quality electric power and carrys out the high problem of energy consumption；The present invention merely adds a set of fused salt and stores thermal desorption system without boiler and steam turbine reformation, realizes the complete thermoelectricity decoupling of fired power generating unit, relieves because guaranteeing the limitation of heating steam parameter, widened peak load regulation load range, improved unit flexibility.
Description
Technical field
The present invention relates to a kind of power generations of fired power generating unit to cooperate with peak regulation technique with heat supply, is primarily adapted for use in different capabilities firepower hair
The thermoelectricitys thermal power plant units such as motor group, including fire coal, biomass, gas Combined circulation.
Background technique
Power grid peak-valley difference increasingly increases at present, and electric system peak regulation pressure also increasingly increases, by taking Zhejiang Province as an example, 2018 years
Zhejiang power grid system adjusts bore maximum peak-valley difference up to 28,860,000 kilowatts, with the throwing of the UHV Transmission Engineerings such as guest's gold, Ning Shao, Zhejiang good fortune
The increase of fortune and Zhejiang generation of electricity by new energy installation, Zhejiang power grid are higher and higher to the flexibility of adjusting and reliability requirement.For hair
Wave large-sized unit energy conservation and environmental protection advantage, most fired power generating units design itself or Late reformation are power generation, heat supply dual purpose unit,
To substitute the small-sized heat supply heating or industrial steam boiler on Large-scale fire-electricity unit periphery, the energy benefit of entire society is improved
With efficiency, pollutant emission is drastically reduced.
As fired power generating unit participates in heat supply, reduce fired power generating unit peak modulation capacity, and install and increase with generation of electricity by new energy
Add, there is an urgent need to further excavate the peak modulation capacity of fired power generating unit, to guarantee power network safety operation, thermoelectricity thermal power plant unit
Depth peaking operation is the certainty of development.
Thermoelectricity thermal power plant unit is mainly by being adjusted unit to modes such as Operational Data Analysis, field tests at present
Unit peak modulation capacity is excavated in optimization, and by taking Zhejiang Province's fired power generating unit as an example, most fired power generating units supply 1.6MPa work to periphery
Industry steam, 300MW grade fired power generating unit are to guarantee that steam quality of supplying, minimum operation load need to control 220MW.Even if passing through pass
It is pressed into steam valve collaboration in small turbine to participate in adjusting cold section of steam pressure of reheating, causes 300MW grade thermoelectricity heat supply minimum operation
Load is improved by original 120MW to 180MW.Due to participate in industrial heating, reduce 300MW grade thermoelectricity pure condensate unit 60~
100MW peak modulation capacity reduces 300MW grade thermoelectricity pure condensate unit in Competitive Electricity Market power.
Summary of the invention
The purpose of the present invention is overcoming deficiency in the prior art, to improve thermoelectricity thermal power plant unit peak modulation capacity or raising
For thermal safety, a kind of fired power generating unit thermoelectricity decoupling system and method based on steam heating fused salt accumulation of heat is provided, is excavated existing
The power generation of thermoelectricity thermal power plant unit, Heating Adjustment load-bearing capacity, reduce unit generation load, improve unit heating demand range, widen
Peak load regulation load range improves unit operational flexibility.
Based on steam heating fused salt accumulation of heat fired power generating unit thermoelectricity decoupled system, including high temperature melting salt cellar, high-temperature melting salt pump,
Low-temperature molten salt tank, low-temperature molten salt pump, steam sensible heat exchanger, fused salt steam superheater, fused salt steam generator, boiler reheating
Device, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, industrial user, oxygen-eliminating device and water pump；The output end of low-temperature molten salt tank passes through low temperature
Pump for liquid salts connects the input terminal of steam sensible heat exchanger, the input of the output end connection high temperature melting salt cellar of steam sensible heat exchanger
End；The input terminal of the output end connection steam sensible heat exchanger of boiler reheater, the output end of steam sensible heat exchanger connect work
Industry user；The output end of high temperature melting salt cellar connects the defeated of fused salt steam superheater and fused salt steam generator by high-temperature melting salt pump
Enter end, fused salt steam superheater connects the input terminal of low-temperature molten salt tank with the output end of fused salt steam generator；Oxygen-eliminating device it is defeated
Outlet connects the input terminal of fused salt steam generator and fused salt steam superheater by water pump, and fused salt steam generator and fused salt steam
The output end of vapour superheater connects industrial user；The output end of boiler reheater connects Steam Turbine Through IP Admission, boiler reheater
Input terminal connects steam turbine high-pressure cylinder.
As preferred: high temperature melting salt cellar exports high-temperature molten salt, and low-temperature molten salt tank exports low-temperature molten salt, boiler reheater output
Boiler reheater outlet vapor, that is, high-temperature steam, oxygen-eliminating device output saturation deaerated water.
The fused salt of fired power generating unit thermoelectricity decoupled system based on steam heating fused salt accumulation of heat stores exothermic processes, including following step
It is rapid:
1) when thermoelectricity thermal power plant unit, which requires, reduces generation load, fused salt stores thermal desorption system and is adjusted to accumulation of heat mode: opening
The outlet valve extracting high-temperature steam of boiler reheater to steam sensible heat exchanger, low-temperature molten salt is pumped molten from low temperature by low-temperature molten salt
Salt cellar is delivered to steam sensible heat exchanger and exchanges heat with boiler reheater outlet vapor, and the high-temperature molten salt storage after heating is supreme
In temperature molten salt tank, while heating the vapor (steam) temperature after fused salt and be down to industrial steam parameter and being supplied to industrial user；
2) when thermoelectricity thermal power plant unit requires to increase heating load, fused salt stores thermal desorption system and is adjusted to Heat release mode: high temperature melting
Salt is delivered to fused salt steam superheater and fused salt steam generator from high temperature melting salt cellar by high-temperature melting salt pump, extracts from oxygen-eliminating device
After deaerated water is saturated by water pump boosting, deaerated water is saturated in fused salt steam generator and fused salt steam superheater by high temperature melting
Salt heating is undergone phase transition, and saturation deaerated water switchs to superheated steam and is supplied to industrial user, and high-temperature molten salt switchs to low-temperature molten salt and deposits to low
In temperature molten salt tank.
As preferred: in the step 1), boiler reheater outlet vapor is due to being partially pumped down to heating fused salt, steam turbine
The throttle flow of intermediate pressure cylinder reduces.
As preferred: in the step 1), low-temperature molten salt and boiler reheater outlet vapor are only in steam sensible heat exchanger
It exchanges heat and steam is not undergone phase transition, low-temperature molten salt becomes high-temperature molten salt and is stored in high temperature melting salt cellar, and high-temperature steam becomes medium temperature steaming
Vapour is as heating steam.
As preferred: in the step 2), high-temperature molten salt and saturation deaerated water are in fused salt steam generator and fused salt steam
It is undergone phase transition after superheater heat exchange and generates medium temperature steam, as heating steam.
As preferred: in the step 2), saturation deaerated water is pressurized by water pump, and water pump discharge pressure is by heating steam pressure
Power determines that water pump discharge pressure is higher than heating steam pressure.
The beneficial effects of the present invention are:
(1) with it is existing turn down steam valve operating scheme is pressed into steam turbine compared with, be pressed into The present invention reduces in steam valve throttling
Loss, improves steam turbine operation security reliability.
(2) compared with existing heat storage electric boiler peak regulation technique, the invention avoids generating high-quality electric powers to be converted into steam zone
Carry out the high problem of energy consumption.
(3) present invention merely adds a set of fused salt and stores thermal desorption system, realize thermoelectricity without boiler and steam turbine reformation
The complete thermoelectricity decoupling of unit, relieves because guaranteeing the limitation of heating steam parameter, has widened peak load regulation load range, improved machine
Group flexibility.
Detailed description of the invention
Fig. 1 is that the fired power generating unit thermoelectricity based on steam heating fused salt accumulation of heat in the embodiment of the present invention decouples system flow chart.
Description of symbols: 1- high temperature melting salt cellar, 2- high-temperature melting salt pump, 3- low-temperature molten salt tank, 4- low-temperature molten salt pump, 5- steam
Vapour sensible heat exchanger, 6- fused salt steam superheater, 7- fused salt steam generator, 8- boiler reheater, 9- steam turbine high-pressure cylinder,
10- Steam Turbine Through IP Admission, 11- industrial user, 12- oxygen-eliminating device, 13- water pump.
Specific embodiment
The present invention is described further below with reference to embodiment.The explanation of following embodiments is merely used to help understand this
Invention.It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, also
Can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection scope of the claims in the present invention
It is interior.
As shown in Figure 1, the fired power generating unit thermoelectricity decoupled system based on steam heating fused salt accumulation of heat, including high temperature melting
Salt cellar 1, low-temperature molten salt tank 3, low-temperature molten salt pump 4, steam sensible heat exchanger 5, fused salt steam superheater 6, melts high-temperature melting salt pump 2
Salt steam generator 7, boiler reheater 8, steam turbine high-pressure cylinder 9, Steam Turbine Through IP Admission 10, industrial user 11, oxygen-eliminating device 12, water
Pump 13.The output end of low-temperature molten salt tank 3 connects the input terminal of steam sensible heat exchanger 5 by low-temperature molten salt pump 4, and steam sensible heat changes
The input terminal of the output end connection high temperature melting salt cellar 1 of hot device 5.The output end connection steam sensible heat exchanger 5 of boiler reheater 8
The output end of input terminal, steam sensible heat exchanger 5 connects industrial user 11.The output end of high temperature melting salt cellar 1 passes through high-temperature molten salt
The input terminal of pump 2 connection fused salt steam superheater 6 and fused salt steam generator 7, fused salt steam superheater 6 and fused salt steam generation
The input terminal of the output end connection low-temperature molten salt tank 3 of device 7.The output end of oxygen-eliminating device 12 connects fused salt steam generation by water pump 13
The input terminal of device 7 and fused salt steam superheater 6, fused salt steam generator 7 connect industry with the output end of fused salt steam superheater 6
User 11.The output end of boiler reheater 8 connects Steam Turbine Through IP Admission 10, and the input terminal connection steam turbine of boiler reheater 8 is high
Cylinder pressure 9.
When thermoelectricity thermal power plant unit, which requires, reduces generation load, fused salt stores thermal desorption system and is adjusted to accumulation of heat mode: opening pot
The outlet valve extracting high-temperature steam of furnace reheater 8 to steam sensible heat exchanger 5, low-temperature molten salt pumps 4 from low temperature by low-temperature molten salt
Fused salt tank 3 is delivered to steam sensible heat exchanger 5 and exchanges heat with boiler reheater outlet vapor, the high-temperature molten salt storage after heating
Into high-temperature molten salt tank 1, boiler reheater outlet vapor reduces Steam Turbine Through IP Admission 10 due to being partially pumped down to heating fused salt
Throttle flow to realize the generated output for reducing generating set, while heating the vapor (steam) temperature after fused salt and being down to industrial steam
Parameter is supplied to industrial user 11.
When thermoelectricity thermal power plant unit requires to increase heating load, fused salt stores thermal desorption system and is adjusted to Heat release mode: high-temperature molten salt
It is delivered to fused salt steam superheater 6 and fused salt steam generator 7 from high temperature melting salt cellar 1 by high-temperature melting salt pump 2, from oxygen-eliminating device 12
After saturation deaerated water is extracted by the boosting of water pump 13, deaerated water is saturated in fused salt steam generator 7 and fused salt steam superheater 6
It is undergone phase transition by high-temperature molten salt heating, saturation deaerated water switchs to superheated steam and is supplied to industrial user 11, and high-temperature molten salt switchs to low temperature
Fused salt is deposited into low-temperature molten salt tank 3, and solve fired power generating unit causes heating parameter or heating load up to not because generation load is low
To the problem of requirement.
Fused salt accumulation of heat is heated using boiler reheater outlet vapor (also referred to as reheating hot arc steam), fused salt heat release is deoxygenation
The saturation deaerated water of the outlet of device 12 or import turns to superheated steam, after fused salt puts thermogenetic superheated steam and heating fused salt
Steam directly supply industrial user 11, realize steam fused salt accumulation of heat peaking generation, improve for thermal safety.
Low-temperature molten salt and reheating hot arc steam are low only in 5 reverse heat-exchange of steam sensible heat exchanger and steam is not undergone phase transition
Temperature molten salt becomes high-temperature molten salt and is stored in high temperature melting salt cellar 1, and high-temperature steam becomes medium temperature steam as heating steam.
High-temperature molten salt and saturation deaerated water undergo phase transition production after fused salt steam generator 7, fused salt steam superheater 6 exchange heat
Raw medium temperature steam, as heating steam.
Saturation deaerated water need to be pressurized by water pump 13, and water pump discharge pressure is determined by heating steam pressure, exit of pump pressure
Power is slightly above heating steam pressure.
Fused salt is heated by steam, fused salt heating saturation deaerated water realizes that fired power generating unit power generation cooperates with mutually tune with heat supply
Peak.
Embodiment:
By taking a subcritical fired power generating unit of 330MW as an example, generated output is 330MW, high pressure cylinder under rated generation operating condition
Steam discharge (cold section of steam of reheating) pressure is 4.15MPa, temperature is 326 DEG C, and high pressure cylinder exhaust steam flow is 908t/h.Boiler reheater
High-temperature steam (reheating hot arc steam) pressure of generation is 3.70MPa, temperature is 540 DEG C, designs a set of capacity and is based on for 76MWh
Steam heats the fired power generating unit thermoelectricity decoupled system of fused salt accumulation of heat, which is 40t/h, continuously steam time 5h,
It steams and is incorporated on industrial steam supply line.
Wherein 1060 ㎡ of steam sensible heat exchanger heat exchange area, 700 ㎡ of fused salt steam generator, fused salt steam superheater 30
㎡, low temperature, high-temperature melting salt pump design discharge 300t/h, pumps design flow 40t/h, rated lift 80m, low temperature, high-temperature molten salt
Tank radius 6m, high 9m, fused salt 1400t, 300 ㎡ of whole system occupied area, total investment of engineering about 18,000,000.
Accumulation of heat process: 540 DEG C of high steams export from boiler reheater 8 and lead to steam sensible heat exchanger with 120t/h flow
5,130 DEG C of low-temperature molten salts are delivered to steam sensible heat exchanger 5 from low-temperature molten salt tank 3 by low-temperature molten salt pump 4 with 300t/h flow
It exchanges heat with boiler reheater outlet vapor, fused salt is heated to 400 DEG C and is stored in high temperature melting salt cellar 1, and high-temperature steam is steaming
Temperature is down to heat user parameter after vapour sensible heat exchanger 5 exchanges heat, and is supplied to industrial user 11.
Heat release process: 400 DEG C of high-temperature molten salts are delivered to by high-temperature melting salt pump 2 from high temperature melting salt cellar 1 with 300t/h flow
Fused salt steam generator 7, fused salt steam superheater 6 draw 40t/h saturation deaerated water from 12 water outlet of oxygen-eliminating device and pass through water pump 13
It is delivered to fused salt steam generator 7, fused salt steam superheater 6 generation 1.8MPa, 260 DEG C of steam, the steam of generation is supplied to work
Industry user 11.
A set of capacity is the fired power generating unit thermoelectricity decoupled system that 76MWh heats fused salt accumulation of heat based on steam, which produces
Vapour amount is 40t/h, continuously steam time 5h, is equivalent to 24MWh generated energy, gets a profit 350 yuan and calculates by every peak regulation MWh electric power, should
The daily charge and discharge of set system twice, can get 0.84 ten thousand yuan of peak regulation rewards every time, can get 1.68 ten thousand yuan of peak regulation rewards daily, every year
It was calculated by 250 days, facilitates to dissolve the renewable electric power of 12,000,000 kWh every year, can get 4,200,000 yuan of incomes every year, it is entire to invest
It can be withdrawn in 4 years, economic and social benefit is obvious.
Claims (7)
1. a kind of fired power generating unit thermoelectricity decoupled system based on steam heating fused salt accumulation of heat, which is characterized in that including high-temperature molten salt
Tank (1), high-temperature melting salt pump (2), low-temperature molten salt tank (3), low-temperature molten salt pump (4), steam sensible heat exchanger (5), fused salt steam mistake
Hot device (6), fused salt steam generator (7), boiler reheater (8), steam turbine high-pressure cylinder (9), Steam Turbine Through IP Admission (10), industry
User (11), oxygen-eliminating device (12) and water pump (13)；The output end of low-temperature molten salt tank (3) connects steam by low-temperature molten salt pump (4)
The input terminal of sensible heat exchanger (5), the input terminal of output end connection high temperature melting salt cellar (1) of steam sensible heat exchanger (5)；Boiler
The input terminal of output end connection steam sensible heat exchanger (5) of reheater (8), the output end connection of steam sensible heat exchanger (5)
Industrial user (11)；The output end of high temperature melting salt cellar (1) is by high-temperature melting salt pump (2) connection fused salt steam superheater (6) and melts
The input terminal of salt steam generator (7), fused salt steam superheater (6) connect low temperature with the output end of fused salt steam generator (7)
The input terminal of fused salt tank (3)；The output end of oxygen-eliminating device (12) is steamed by water pump (13) connection fused salt steam generator (7) and fused salt
The input terminal of vapour superheater (6), fused salt steam generator (7) connect industrial user with the output end of fused salt steam superheater (6)
(11)；The output end of boiler reheater (8) connects Steam Turbine Through IP Admission (10), and the input terminal of boiler reheater (8) connects steamer
Machine high pressure cylinder (9).
2. the fired power generating unit thermoelectricity decoupled system according to claim 1 based on steam heating fused salt accumulation of heat, feature exist
In high temperature melting salt cellar (1) exports high-temperature molten salt, and low-temperature molten salt tank (3) exports low-temperature molten salt, and boiler reheater (8) exports boiler
Reheater outlet vapor, that is, high-temperature steam, oxygen-eliminating device (12) output saturation deaerated water.
3. a kind of fused salt of the fired power generating unit thermoelectricity decoupled system as described in claim 1 based on steam heating fused salt accumulation of heat stores
Exothermic processes, which comprises the following steps:
1) when thermoelectricity thermal power plant unit, which requires, reduces generation load, fused salt stores thermal desorption system and is adjusted to accumulation of heat mode: opening boiler
The outlet valve extracting high-temperature steam of reheater (8) to steam sensible heat exchanger (5), low-temperature molten salt by low-temperature molten salt pump (4) from
Low-temperature molten salt tank (3) is delivered to steam sensible heat exchanger (5) and exchanges heat with boiler reheater outlet vapor, the high temperature after heating
Fused salt is stored into high-temperature molten salt tank (1), at the same heat the vapor (steam) temperature after fused salt be down to industrial steam parameter be supplied to it is industrial
Family (11)；
2) when thermoelectricity thermal power plant unit requires to increase heating load, fused salt stores thermal desorption system and is adjusted to Heat release mode: high-temperature molten salt is logical
It crosses high-temperature melting salt pump (2) and is delivered to fused salt steam superheater (6) and fused salt steam generator (7) from high temperature melting salt cellar (1), from removing
After oxygen device (12) extracts saturation deaerated water by water pump (13) boosting, deaerated water is saturated in fused salt steam generator (7) and fused salt
It being undergone phase transition in steam superheater (6) by high-temperature molten salt heating, saturation deaerated water switchs to superheated steam and is supplied to industrial user (11),
High-temperature molten salt switchs to low-temperature molten salt and deposits into low-temperature molten salt tank (3).
4. the fused salt storage of the fired power generating unit thermoelectricity decoupled system according to claim 3 based on steam heating fused salt accumulation of heat is put
Hot method, which is characterized in that in the step 1), boiler reheater outlet vapor is due to being partially pumped down to heating fused salt, steamer
The throttle flow of machine intermediate pressure cylinder (10) reduces.
5. the fused salt storage of the fired power generating unit thermoelectricity decoupled system according to claim 3 based on steam heating fused salt accumulation of heat is put
Hot method, which is characterized in that in the step 1), low-temperature molten salt and boiler reheater outlet vapor are only in steam sensible heat exchanger
(5) it exchanges heat and steam is not undergone phase transition, low-temperature molten salt becomes high-temperature molten salt and is stored in high temperature melting salt cellar (1), and high-temperature steam becomes
Medium temperature steam is as heating steam.
6. the fused salt storage of the fired power generating unit thermoelectricity decoupled system according to claim 3 based on steam heating fused salt accumulation of heat is put
Hot method, which is characterized in that in the step 2), high-temperature molten salt and saturation deaerated water are in fused salt steam generator (7) and fused salt
It is undergone phase transition after steam superheater (6) heat exchange and generates medium temperature steam, as heating steam.
7. the fused salt storage of the fired power generating unit thermoelectricity decoupled system according to claim 3 based on steam heating fused salt accumulation of heat is put
Hot method, which is characterized in that in the step 2), saturation deaerated water is pressurized by water pump (13), and water pump discharge pressure is by heat supply
Steam pressure determines that water pump discharge pressure is higher than heating steam pressure.
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| CN113283121A (en) * | 2021-06-29 | 2021-08-20 | 西安热工研究院有限公司 | Flow and capacity design method and system for molten salt heat storage industrial steam supply system |
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| CN113847109A (en) * | 2021-09-26 | 2021-12-28 | 西安热工研究院有限公司 | Electric heating comprehensive energy storage peak regulation system of coal electric unit and working method |
| CN114876596A (en) * | 2022-05-18 | 2022-08-09 | 西安热工研究院有限公司 | Operation system and method for fused salt steam heat storage of cylinder cutting unit |
| CN115653714A (en) * | 2022-11-04 | 2023-01-31 | 中国成达工程有限公司 | Constant-load boiler operation peak shaving power generation system and method utilizing molten salt for heat storage |
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