CN108458328A - A kind of tower type solar photo-thermal steam generating system adjusted using hot melt salt - Google Patents
A kind of tower type solar photo-thermal steam generating system adjusted using hot melt salt Download PDFInfo
- Publication number
- CN108458328A CN108458328A CN201810229176.2A CN201810229176A CN108458328A CN 108458328 A CN108458328 A CN 108458328A CN 201810229176 A CN201810229176 A CN 201810229176A CN 108458328 A CN108458328 A CN 108458328A
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- hot melt
- generating system
- type solar
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- 150000003839 salts Chemical class 0.000 title claims abstract description 118
- 239000012943 hotmelt Substances 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000010248 power generation Methods 0.000 claims description 11
- 229920006395 saturated elastomer Polymers 0.000 claims description 7
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Inorganic materials [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 3
- 210000004209 hair Anatomy 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/06—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention provides a kind of tower type solar photo-thermal steam generating systems adjusted using hot melt salt, it is characterized in that, it include the hot fused salt storage tank connection first pipe equipped with high-temperature molten salt, first pipe branches into second pipe and third pipeline, second pipe is connected into superheater shell side inlet, third pipeline is connected into reheater shell side inlet, superheater shell-side outlet fused salt pipeline and reheater shell-side outlet fused salt pipeline are connected into the 4th pipeline and the 5th pipeline respectively, 4th pipeline and the 5th pipeline are incorporated to the 6th pipeline, 6th pipeline is connected into evaporator shell side inlet, 6th pipeline connection the first hot melt salt adjusts one end of pipeline, first hot melt salt adjusts the hot fused salt storage tank described in the other end connection of pipeline.The system adapts to load and pressure limit is big, meets the stable operation under the operating modes such as cloudy, overcast and rainy or night of solar energy steam power plant, reduces the generation that power plant shuts down operating mode, is obviously improved the generating efficiency of power plant.
Description
Technical field
The present invention relates to a kind of tower type solar photo-thermal steam generating systems adjusted using hot melt salt.
Technical background
National Development and Reform Committee, Bureau of Energy issue《Production of energy and consumption revolution are strategic (2016-2030)》(hair changes basis
[2016] No. 2795), it is proposed that non-fossil energy spanning development action accounts for whole power generations to the year two thousand thirty non-fossil energy generated energy
The proportion of amount is striven for reaching 50%.Current stage, the ten thousand yuan/kW of project cost about 2.5-3 of photo-thermal power generation project, it is contemplated that arrive
The year two thousand twenty, project cost can be reduced to 1.5 ten thousand yuan/kW, and at that time, rate for incorporation into the power network can be reduced to 0.75 yuan/kWh or less.Cut-off
The year two thousand thirty photo-thermal power generation total installation of generating capacity ratio is up to 17% (3,000,000,000 kW of total installation of generating capacity), and gross generation is up to 9% (gross generation 10
Hundred million kWh).
Invention content
The object of the present invention is to provide a kind of tower type solar photo-thermal steam generating systems adjusted using hot melt salt.
In order to achieve the above object, the present invention provides a kind of tower type solar photo-thermal steam hairs adjusted using hot melt salt
Raw system, which is characterized in that include the hot fused salt storage tank connection first pipe equipped with high-temperature molten salt, first pipe branches into second
Pipeline and third pipeline, second pipe are connected into superheater shell side inlet, and third pipeline is connected into reheater shell side inlet, superheater shell
Journey exports fused salt pipeline and reheater shell-side outlet fused salt pipeline and is connected into the 4th pipeline and the 5th pipeline respectively, the 4th pipeline and the
Five pipelines are incorporated to the 6th pipeline, and the 6th pipeline is connected into evaporator shell side inlet, and the 6th pipeline connection the first hot melt salt adjusts pipeline
One end, the first hot melt salt adjusts the other end connection hot fused salt storage tank of pipeline.
Preferably, the evaporator shell-side outlet is connected into the 7th pipeline, and the 7th pipeline is connected into preheater shell side inlet, in advance
Hot device shell-side outlet is connected into one end of the 8th pipeline, and the 7th pipeline connection the second hot melt salt adjusts one end of pipeline, the second hot melt
The other end that salt adjusts pipeline connects hot fused salt storage tank, and sloppy heat salt of the other end connection equipped with low-temperature molten salt of the 8th pipeline stores up
Tank.
Preferably, water supply is connected into the 9th pipeline by feed pump, and the 9th pipeline connects the tube-side inlet of preheater, preheater
The tenth pipeline of tube side outlet connection, the tenth pipe outlet connect drum, and drum connects evaporator tube side, warp by the 11st pipeline
Steam water interface is generated after evaporator heat exchange, and drum, the steam for the saturated vapor that drum generates are connected by the 12nd pipe outlet
The 13rd pipeline of outlet connection, the 13rd pipe outlet connect superheater tube side, and the outlet of superheater tube side connects the 14th pipeline,
14th pipeline connects steam turbine and carries out turbine power generation.
Preferably, the cold reheat steam (vapor) outlet end of the steam turbine connects reheater tube by the 15th pipeline
Journey, the 16th pipeline of reheater tube side outlet connection, the 16th pipe outlet connect steam turbine and carry out turbine power generation.
Preferably, feed temperature >=250 DEG C.
Preferably, the high-temperature molten salt temperature is 565 DEG C, and low-temperature molten salt temperature is 290 DEG C.
Preferably, the fused salt composition main component 40%KNO3And 60%NaNO3, fused salt crystallization temperature is 236 DEG C.
Preferably, the load variations range of the tower type solar photo-thermal steam generating system adjusted using hot melt salt
10%-110%.
Preferably, the tower type solar photo-thermal steam generating system adjusted using hot melt salt is suitable for steam pressure
≥5MPa。
Preferably, the varying load condition of the tower type solar photo-thermal steam generating system adjusted using hot melt salt is adopted
Steam generating system is adjusted with the mode that hot melt salt and sloppy heat salt combine, generates the overheat and reheated steam of qualified quality.
Preferably, fused salt obtains heat by tower type solar system in the hot fused salt storage tank.
Compared with prior art, the beneficial effects of the invention are as follows：
1, the steam generating system being capable of the stable operation under large-scale varying load condition；
System stable operation is can guarantee if even if 2, steam water lateral pressure changes equally；
3, since system design is built upon on theoretical calculation basis, often designer can there are certain richnesses to system
Surplus, since this system adapts to a wide range of varying load condition feature, the inaccurate problem of the left calculating of design, system itself
It can contain or digest；
4, the system adapts to load and pressure limit is big, meets solar energy steam power plant in works such as cloudy, overcast and rainy or nights
Stable operation under condition reduces the generation that power plant shuts down operating mode, is obviously improved the generating efficiency of power plant；
Description of the drawings
Fig. 1 is the tower type solar photo-thermal steam generating system structural schematic diagram adjusted using hot melt salt.
Specific implementation mode
With reference to specific example, the present invention is further explained, it should be appreciated that these embodiments be merely to illustrate the present invention and
It is not used in and limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Various changes or modification can be made to the present invention, such equivalent forms are equally fallen within defined by the application the appended claims
Range.
Embodiment
As shown in Figure 1, the tower type solar photo-thermal steam generating system of the present invention adjusted using hot melt salt includes being used for
To the preheater d that water is preheated, the evaporator c for water evaporation to be formed to steam water interface, for steam water interface into
Row steam-water separation generates the drum e of saturated vapor, generates the superheater a of superheated steam for heating saturated vapor, and be used for
Generate the reheater b of reheated steam.
The tower type solar photo-thermal steam generating system adjusted using hot melt salt, which is characterized in that including being equipped with high temperature melting
The hot fused salt storage tank of salt connects first pipe 1, and first pipe 1 branches into second pipe 2 and third pipeline 3, and second pipe 2 is connected into
Superheater a shell side inlets, third pipeline 3 are connected into reheater b shell side inlets, superheater a shell-side outlet fused salt pipelines and reheater b
Shell-side outlet fused salt pipeline is connected into the 4th pipeline 4 and the 5th pipeline 5 respectively, and the 4th pipeline 4 and the 5th pipeline 5 are incorporated to the 6th pipeline
6, the 6th pipeline 6 is connected into evaporator c shell side inlets, and the 6th pipeline 6 connection the first hot melt salt adjusts one end of pipeline 17, the first heat
Fused salt adjusts the hot fused salt storage tank described in the other end connection of pipeline 17.The evaporator c shell-side outlets are connected into the 7th pipeline
7, the 7th pipeline 7 is connected into preheater d shell side inlets, and preheater d shell-side outlets are connected into one end of the 8th pipeline 8, and the 7th pipeline 7 connects
Connecing one end that the second hot melt salt adjusts pipeline 18, the other end that the second hot melt salt adjusts pipeline 18 connects hot fused salt storage tank, and the 8th
Cold fused salt storage tank of the other end connection equipped with low-temperature molten salt of pipeline 8.
Water supply (temperature >=250 DEG C) is connected into the 9th pipeline 9 by feed pump, and the tube side of the 9th pipeline 9 connection preheater d enters
Mouthful, the tenth pipeline 10 of preheater d tube sides outlet connection, the tenth pipeline 10 outlet connection drum e, drum e pass through the 11st pipeline
11 connection evaporator c tube sides, generation steam water interface exports connection drum e by the 12nd pipeline 12 after evaporator c heat exchange,
The steam (vapor) outlet for the saturated vapor that drum e is generated connects the 13rd pipeline 13, the 13rd pipeline 13 outlet connection superheater a pipes
Journey, the 14th pipeline 14 of superheater a tube sides outlet connection, the 14th pipeline 14 connect steam turbine and carry out turbine power generation.Steam
The cold reheat steam (vapor) outlet end of turbine connects reheater b tube sides, reheater b tube sides outlet connection the by the 15th pipeline 15
Connection steam turbine in the 16, the 16th pipeline 16 of 16 pipeline outlet carries out turbine power generation.
Fused salt in the hot fused salt storage tank obtains heat by tower type solar system.The high-temperature molten salt is (again
Heating salt) temperature be referred to as 565 DEG C, low-temperature molten salt (also known as sloppy heat salt) temperature is 290 DEG C.Fused salt forms main component 40%KN03
And 60%NaNO3, fused salt crystallization temperature is about 236 DEG C.The tower type solar photo-thermal steam hair adjusted using hot melt salt
Raw system is suitable for steam pressure >=5MPa.
The varying load condition of the tower type solar photo-thermal steam generating system adjusted using hot melt salt is using hot melt
The mode that salt and sloppy heat salt combine adjusts steam generating system, generates the overheat and reheated steam of qualified quality.
The load variations range 10%- of the tower type solar photo-thermal steam generating system adjusted using hot melt salt
110%.The steam generating system works there are two types of operating modes：Design operating mode at full capacity；Load down operating mode.
Design operating mode at full capacity：565 DEG C of high-temperature molten salts from hot fused salt storage tank enter first pipe 1, in first pipe 1
Fused salt separately flows into second pipe 2 and third pipeline 3 in proportion, and second pipe 2 heats salt and enters superheater a shell sides, third pipe
Road 3 heats salt and enters reheater b shell sides, and after superheater a and reheater b heat exchange, superheater a shell-side outlet fused salts enter the 4th
Pipeline 4, reheater b shell-side outlet fused salts enter the 5th pipeline 5, enter the 6th after the 4th pipeline 4 and the mixing of 5 fused salt of the 5th pipeline
Pipeline 6,6 fused salt of the 6th pipeline enter evaporator c shell sides, and after evaporator c heat exchange, evaporator c shell-side outlet fused salts enter the
Seven pipelines 7,7 fused salt of the 7th pipeline enter preheater d shell sides, and after preheated device d heat exchange, preheater d shell-side outlet fused salts enter
8th pipeline 8, the sloppy heat salt after the heat exchange of each heat exchanger flow into cold fused salt storage tank through the 8th pipeline 8.250 from feed pump
DEG C steam generating system water supply enters the 9th pipeline 9, and the water of the 9th pipeline 9 enters the tube side of preheater d, preheated device d heat exchange
Afterwards, preheater d tube sides go out saliva into the tenth pipeline 10, and 10 water of the tenth pipeline enters drum e, and the water in drum e passes through the tenth
One pipeline 11 enters evaporator c tube sides, generates steam water interface after evaporator c heat exchange, evaporator c tube sides export steam-water mixing
Object enters drum e through the 12nd pipeline 12, and drum e carries out steam-water separation to steam water interface, and the saturated vapor of generation is from drum e
Steam (vapor) outlet enters the 13rd pipeline 13, and saturated vapor enters superheater a tube sides through the 13rd pipeline 13, exchanges heat through superheater a
Qualified superheated steam is generated afterwards, and superheated steam enters the 14th pipeline 14,14 mistake of the 14th pipeline from the outlet of superheater a tube sides
Hot steam is delivered to steam turbine and carries out turbine power generation.Entered by the 15th pipeline 15 from steam turbine cold reheat steam
Reheater b tube sides generate qualified high temperature reheated steam after reheated device b heat exchange, and high temperature reheated steam goes out from reheater b tube sides
Mouth enters the 16th pipeline 16, and 16 high temperature reheated steam of the 16th pipeline is delivered to steam turbine and carries out turbine power generation.
Load down operating mode：Since (superheater a, reheater b, evaporator c, preheater d) design work to heat transmission equipment in system
Condition be oepration at full load operating mode, when load down run, heat exchange area will generate it is larger have more than needed, especially in extreme underload
Under operating mode, such as 10% operating mode, at this time such as without adjusting accordingly, overtemperature, hot side medium will occur for each heat exchanger cold side
Surfusion will occur.In order to avoid above-mentioned phenomenon occurs, needs to reduce the fused salt amount in first pipe 1, be melted in first pipe 1
Salt separately flows into second pipe 2 and third pipeline 3 in proportion, and adjusts pipeline 17 in the 6th pipeline 6 access the first hot melt salt,
7th pipeline 7 access the second hot melt salt adjusts pipeline 18.Above-mentioned first hot melt salt adjusts pipeline 17, second and heats salt adjusting pipeline
Hot melt salt in 18 comes from hot fused salt storage tank, and hot temperature of molten salt is 565 DEG C.
Claims (10)
1. a kind of tower type solar photo-thermal steam generating system adjusted using hot melt salt, which is characterized in that including being equipped with high temperature
The hot fused salt storage tank connection first pipe (1) of fused salt, first pipe (1) branch into second pipe (2) and third pipeline (3), the
Two pipelines (2) are connected into superheater (a) shell side inlet, and third pipeline (3) is connected into reheater (b) shell side inlet, superheater (a) shell side
Outlet fused salt pipeline and reheater (b) shell-side outlet fused salt pipeline are connected into the 4th pipeline (4) and the 5th pipeline (5) respectively, and the 4th
Pipeline (4) and the 5th pipeline (5) are incorporated to the 6th pipeline (6), and the 6th pipeline (6) is connected into evaporator (c) shell side inlet, the 6th pipeline
(6) connection first heats one end that salt adjusts pipeline (17), and the first hot melt salt is adjusted described in the other end connection of pipeline (17)
Hot fused salt storage tank.
2. the tower type solar photo-thermal steam generating system as described in claim 1 adjusted using hot melt salt, which is characterized in that
Evaporator (c) shell-side outlet is connected into the 7th pipeline (7), and the 7th pipeline (7) is connected into preheater (d) shell side inlet, preheating
Device (d) shell-side outlet is connected into one end of the 8th pipeline (8), and the 7th pipeline (7) connection the second hot melt salt adjusts the one of pipeline (18)
End, the other end that the second hot melt salt adjusts pipeline (18) connect hot fused salt storage tank, and the other end connection of the 8th pipeline (8) is equipped with low
The cold fused salt storage tank of temperature molten salt.
3. the tower type solar photo-thermal steam generating system as described in claim 1 adjusted using hot melt salt, which is characterized in that
Water supply is connected into the 9th pipeline (9) by feed pump, and the 9th pipeline (9) connects the tube-side inlet of preheater (d), preheater (d) pipe
The tenth pipeline (10) of journey outlet connection, the tenth pipeline (10) outlet connection drum (e), drum (e) pass through the 11st pipeline (11)
Evaporator (c) tube side is connected, steam water interface is generated after evaporator (c) heat exchange, connection vapour is exported by the 12nd pipeline (12)
It wraps (e), the steam (vapor) outlet for the saturated vapor that drum (e) generates connects the 13rd pipeline (13), and the outlet of the 13rd pipeline (13) connects
Superheater (a) tube side, the 14th pipeline (14) of superheater (a) tube side outlet connection are connect, the 14th pipeline (14) connects vapor wheel
Machine carries out turbine power generation.
4. the tower type solar photo-thermal steam generating system as claimed in claim 3 adjusted using hot melt salt, which is characterized in that
The cold reheat steam (vapor) outlet end of steam turbine connects reheater (b) tube side, reheater (b) tube side by the 15th pipeline (15)
The 16th pipeline (16) of outlet connection, the 16th pipeline (16) outlet connection steam turbine carry out turbine power generation.
5. the tower type solar photo-thermal steam generating system as claimed in claim 3 adjusted using hot melt salt, which is characterized in that
Feed temperature >=250 DEG C.
6. the tower type solar photo-thermal steam generating system as claimed in claim 2 adjusted using hot melt salt, which is characterized in that
The high-temperature molten salt temperature is 565 DEG C, and low-temperature molten salt temperature is 290 DEG C.
7. the tower type solar photo-thermal steam generating system as claimed in claim 2 adjusted using hot melt salt, which is characterized in that
The fused salt composition main component 40%KNO3And 60%NaNO3, fused salt crystallization temperature is 236 DEG C.
8. the tower type solar photo-thermal steam generating system as described in claim 1 adjusted using hot melt salt, which is characterized in that
The load variations range 10%-110% of the tower type solar photo-thermal steam generating system adjusted using hot melt salt.
9. the tower type solar photo-thermal steam generating system as described in claim 1 adjusted using hot melt salt, which is characterized in that
The tower type solar photo-thermal steam generating system adjusted using hot melt salt is suitable for steam pressure >=5MPa.
10. the tower type solar photo-thermal steam generating system as described in claim 1 adjusted using hot melt salt, feature are existed
In, the described tower type solar photo-thermal steam generating system adjusted using hot melt salt varying load condition using hot melt salt and cold
The mode that fused salt combines adjusts steam generating system, generates the overheat and reheated steam of qualified quality.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810229176.2A CN108458328A (en) | 2018-03-20 | 2018-03-20 | A kind of tower type solar photo-thermal steam generating system adjusted using hot melt salt |
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| CN201810229176.2A CN108458328A (en) | 2018-03-20 | 2018-03-20 | A kind of tower type solar photo-thermal steam generating system adjusted using hot melt salt |
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| CN110059386A (en) * | 2019-04-10 | 2019-07-26 | 西安交通大学 | A kind of verification calculation method of shell-and-tube heat exchanger outlet parameter |
| CN111288428A (en) * | 2020-04-09 | 2020-06-16 | 东方电气集团东方锅炉股份有限公司 | Fused salt electrode boiler heat-storage power generation system |
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Application publication date: 20180828 |