CN109654756A - A kind of fused salt heat reservoir and its heat change method for solar energy thermo-power station - Google Patents
A kind of fused salt heat reservoir and its heat change method for solar energy thermo-power station Download PDFInfo
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- CN109654756A CN109654756A CN201811622335.1A CN201811622335A CN109654756A CN 109654756 A CN109654756 A CN 109654756A CN 201811622335 A CN201811622335 A CN 201811622335A CN 109654756 A CN109654756 A CN 109654756A
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- 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
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- 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
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
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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
- 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
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention provides a kind of fused salt heat reservoir for solar energy thermo-power station, the fused salt heat reservoir includes: salt storage tank (1), mixer (7), preheater (4), low-temperature molten salt storage tank (2), Jing Chang (13) and multiple pipelines；Technical solution provided by the invention, the high-temperature molten salt of salt storage tank is mixed with the low-temperature molten salt of steam generator outlet using mixer, improves the risk of preheater frozen block caused by reducing into preheater import temperature of molten salt because of factors such as load adjustment and environment；Under night operating condition, the low-temperature molten salt of mirror field pipeline reflux is mixed through mixer with high-temperature molten salt, the temperature of molten salt flowed into the pipeline of mirror field is improved, the allowance that fused salt is safely operated in night Jing Chang circuit is improved, reduces the risk of fused salt frozen block in the circuit Jing Chang.Technical solution provided by the invention reduces photo-thermal power generation factory heat tracing with from power consumption, improves economy of power plant income.
Description
Technical field
The invention belongs to solar light-heat power-generation fields, and in particular to a kind of fused salt heat accumulation for solar energy thermo-power station
System and its heat change method.
Background technique
Solar energy high temperature hot generation technology is the important directions that solar energy scale utilizes, and solves fossil energy to the mankind
The problems such as crisis, air pollution, has far-reaching significance.The working medium that the power generation of solar energy high temperature heat uses has water (water vapour), melts
Salt, air, conduction oil, liquid metal and other heat-conducting mediums etc..Wherein, due to the fluctuation of solar irradiation and discontinuity,
There must be extensive heat reservoir could continuous and stable electric generation in solar light-heat power-generation system.Fused salt has, temperature high using temperature
The characteristics such as range is wide, flow behavior is good, thermal capacity is big are spent, being applied in heat reservoir as heat accumulation working medium can just make up too
Sunlight is the solar energy heat-storage working medium being most widely used at present according to unstable problem.
Traditional solar groove type solar-thermal generating system causes system work due to being limited by conduction oil safe handling temperature
Make temperature no more than 400 DEG C, influences system overall operation efficiency；In actual operation, due to the influence of ambient temperature
Or the requirement of network load variation scheduling, cause steam generator often to be offset operating point for design operation, be easy to cause carbonated drink
Side preheater fused salt outlet temperature is too low, and there are the risks of frozen block for preheater；Night run when, due to ambient temperature etc. because
The influence of element causes the fused salt flowed out from low-temperature molten salt storage tank to spend in the circuit Jing Chang medium temperature low, is easy to happen frozen block accident.
Summary of the invention
In order to solve the above deficiencies in the existing technologies, the present invention provides a kind of for solar energy thermo-power station
Fused salt heat reservoir and its heat change method, the system utilize mixer by the high-temperature molten salt of salt storage tank and steam generation
The low-temperature molten salt of device outlet is mixed, and improving reduces into preheater import temperature of molten salt because of load adjustment and environment etc.
The risk of preheater frozen block caused by factor；Under night operating condition, the low-temperature molten salt of mirror field pipeline reflux is through mixer and high temperature melting
Salt is mixed, and the temperature of molten salt flowed into the pipeline of mirror field is improved, and improves what fused salt in night Jing Chang circuit was safely operated
Allowance reduces the risk of fused salt frozen block in the circuit Jing Chang.
Realize that the technical solution of above-mentioned purpose is as follows:
A kind of fused salt heat reservoir for solar energy thermo-power station, it is improved in that the fused salt heat reservoir
It include: salt storage tank (1), mixer (7), preheater (4), low-temperature molten salt storage tank (2), Jing Chang (13) and multiple pipes
Road；
The low-temperature molten salt storage tank (2), Jing Chang (13), mixer (7) and low-temperature molten salt storage tank (2) are successively connected by pipeline
It connects；The salt storage tank (1), mixer (7), preheater (4) and low-temperature molten salt storage tank (2) are sequentially connected by pipeline；
The mixer (7) is used to be entered by the Jing Chang (13) fused salt of the mixer (7) and by the high temperature
The fused salt that fused salt storage tank (1) enters the mixer (7) is mixed.
It is preferred that the fused salt heat reservoir further include: multiple control valves；The valve is isolating valve.
It is preferred that the control valve includes: valve (9), valve (10), valve (11) and valve (12)；
The Jing Chang (13) is also connect with the salt storage tank (1) by pipeline, and the valve (9) is set to described
On pipeline between Jing Chang (13) and the salt storage tank (1)；
The valve (10) is set on the pipeline between the Jing Chang (13) and the mixer (7)；
The valve (11) is set on the pipeline between the mixer (7) and Jing Chang (13)；
The valve (12) is set on the pipeline between the salt storage tank (1) and mixer (7)；
The valve (12) is constantly in opening state.
It is preferred that the valve (10) and valve (11) are opened when the valve (9) is closed；
The low-temperature molten salt storage tank (2) passes sequentially through Jing Chang (13), valve (10), mixer (7), valve (11) and low temperature
Fused salt storage tank (2) connects and composes the first circuit.
The salt storage tank (1), superheater (6), evaporator (5), mixer (7), preheater (4), low-temperature molten salt
Storage tank (2) is sequentially connected by pipeline constitutes second servo loop；
It is preferred that further including evaporator (5) and superheater (6)；
It is also connected by evaporator (5) and superheater (6) between the mixer (7) and salt storage tank (1)；
The valve (9) is opened, and the valve (10) and valve (11) are closed；
It is the Jing Chang (13), valve (9), salt storage tank (1), superheater (6), evaporator (5), mixer (7), pre-
Hot device (4), low-temperature molten salt storage tank (2) and Jing Chang (13) are sequentially connected by pipeline and constitute tertiary circuit；
Described first and second and three circuit for fused salt circulate.
It is preferred that the preheater (4), evaporator (5) and superheater (6) are sequentially connected by pipeline and constitute the 4th circuit；Institute
It is logical to state the 4th circuit waterman's mass flow；
The preheater (4) carries out heat exchange for device of working medium and the fused salt；
The evaporator (5), which is used to heat device of working medium by the fused salt, generates steam；
The superheater (6) is for being reheated the steam by the fused salt.
It is preferred that telling that the 4th circuit further includes low-pressure heater (3) and steam turbine (8)；The superheater (6) passes through steamer
Machine (8) and low-pressure heater (3) connection preheater (4).
It is preferred that the tank deck of the salt storage tank (1) and the low-temperature molten salt storage tank (2) is provided with pump for liquid salts.
It is preferred that the pump for liquid salts is liquid following formula pump for liquid salts.
It is preferred that, which comprises such as the power described in any item fused salt heat accumulation systems for solar energy thermo-power station of 1-7
System；
When running in the evening, high-temperature molten salt and the low-temperature molten salt from Jing Chang (13) of salt storage tank (1) storage exist
Pass through preheater (4) respectively into low-temperature molten salt storage tank (2) or after being directly entered (11) after carrying out mixing heating in mixer (7)
Again return to (13).
It is preferred that the method also includes:
When operation on daytime, the high-temperature molten salt from Jing Chang (13) enters salt storage tank (1), then flows through superheater
(6) and evaporator (5)；
Steam in the high-temperature molten salt and superheater (6) carries out heat exchange, and the high-temperature molten salt carries out first time cooling,
Then the water in evaporator (5) is heated to be steam again, the high-temperature molten salt carries out second and cools down, and obtains middle low-temperature molten salt；
The middle low-temperature molten salt is mixed with the high-temperature molten salt directly from salt storage tank (1) in mixer (7)；
Jing Chang (13) are flowed into after carrying out third time cooling via preheater (4) again.
It is preferred that the method also includes:
In night operation, the valve (9) is closed；When daytime runs, the valve (9) is opened.
Compared with the immediate prior art, technical solution provided by the invention is had the advantages that
(1) technical solution provided by the invention, comprising: salt storage tank (1), preheater (4), mixer (7), low temperature
Fused salt storage tank (2), Jing Chang (13) and be used for multiple pipelines interconnected；The low-temperature molten salt storage tank (2), Jing Chang (13),
Mixer (7) and low-temperature molten salt storage tank (2), which are sequentially connected, constitutes the first circuit；The low-temperature molten salt storage tank (2), preheater (4),
Mixer (7) and salt storage tank (1) are sequentially connected；The mixer (7) is used for the mixing of low-temperature molten salt and high-temperature molten salt.
High-temperature molten salt is mixed with low-temperature molten salt by mixer, improves the temperature of molten salt into preheater and Jing Chang, thus
Reduce the risk of preheater and mirror field frozen block.
(2) technical solution provided by the invention, when running at daytime and night, using mixer by salt storage tank
High-temperature molten salt is mixed with the low-temperature molten salt of steam generator outlet, is improved into preheater import temperature of molten salt, is reduced
Because of the risk of preheater frozen block caused by the factors such as load adjustment and environment.
(3) technical solution provided by the invention, under night operating condition, the low-temperature molten salt of mirror field pipeline reflux is through mixer and high
Temperature molten salt is mixed, and the temperature of molten salt flowed into the pipeline of mirror field is improved, and is improved fused salt in night Jing Chang circuit and is transported safely
Capable allowance reduces the risk of fused salt frozen block in the circuit Jing Chang.
(4) technical solution provided by the invention reduces photo-thermal power generation factory heat tracing with from power consumption, improves economy of power plant and receive
Benefit.
Detailed description of the invention
Fig. 1 is equipment connection schematic diagram of the invention；
In figure, 1- salt storage tank, 2- low-temperature molten salt storage tank, 3- low-pressure heater, 4- preheater, 5- steam generation
Device, 6- superheater, 7- mixer, 8- steam turbine, 9- control valve, 10- control valve, 11- control valve, 12- control valve,
13- Jing Chang.
Specific embodiment
Pipeline, valve, instrument between low-pressure heater 3, preheater 4, evaporator 5, superheater 6 and each equipment are constituted
Main carbonated drink circuit, device of working medium pass sequentially through steam-water pipeline by fused salt be heated as superheated steam enter steam turbine 8 acting hair
Electricity.
Pipeline, valve between salt storage tank 1, low-temperature molten salt storage tank 2, pump for liquid salts, mixer 7 and each equipment,
Instrument constitutes main fused salt circuit.When daytime runs, valve 9 and 12 is opened, valve 10,11 is closed, in salt storage tank
Fused salt by after the liquid following formula pump for liquid salts pressurized delivered to hot device and steam generator of tank deck, the high temperature with salt storage tank
Fused salt carries out mixing heating in a mixer, then followed by preheater, low-temperature molten salt storage tank, the circuit Jing Chang.When night runs,
Valve 9 is closed, valve 10,11,12 is opened, the fused salt in salt storage tank passes through the liquid following formula pump for liquid salts pressurized delivered of tank deck
To superheater and steam generator, carry out mixing heating in a mixer with the fused salt from salt storage tank, then successively
Preheater, low-temperature molten salt storage tank are flowed through, the circuit Jing Chang night can not absorb solar energy, and the low-temperature molten salt of mirror field pipeline reflux is through mixed
Clutch carries out flowing back to Jing Chang after mixing heating with high-temperature molten salt, to maintain the circuit Jing Chang fused salt to recycle.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, are intended to be within the scope of the claims of the invention.
Claims (12)
1. a kind of fused salt heat reservoir for solar energy thermo-power station, which is characterized in that the fused salt heat reservoir includes: height
Temperature molten salt storage tank (1), mixer (7), preheater (4), low-temperature molten salt storage tank (2), Jing Chang (13) and multiple pipelines；
The low-temperature molten salt storage tank (2), Jing Chang (13), mixer (7) and low-temperature molten salt storage tank (2) are sequentially connected by pipeline；Institute
Salt storage tank (1), mixer (7), preheater (4) and low-temperature molten salt storage tank (2) is stated to be sequentially connected by pipeline；
The mixer (7) is used to be entered by the Jing Chang (13) fused salt of the mixer (7) and by the high-temperature molten salt
The fused salt that storage tank (1) enters the mixer (7) is mixed.
2. a kind of fused salt heat reservoir for solar energy thermo-power station as described in claim 1, which is characterized in that described molten
Salt heat reservoir further include: multiple control valves；The valve is isolating valve.
3. a kind of fused salt heat reservoir for solar energy thermo-power station as claimed in claim 2, which is characterized in that the control
Valve processed includes: valve (9), valve (10), valve (11) and valve (12)；
The Jing Chang (13) is also connect with the salt storage tank (1) by pipeline, and the valve (9) is set to the Jing Chang
(13) on the pipeline between the salt storage tank (1)；
The valve (10) is set on the pipeline between the Jing Chang (13) and the mixer (7)；
The valve (11) is set on the pipeline between the mixer (7) and Jing Chang (13)；
The valve (12) is set on the pipeline between the salt storage tank (1) and mixer (7)；
The valve (12) is constantly in opening state.
4. a kind of fused salt heat reservoir for solar energy thermo-power station as claimed in claim 2, which is characterized in that the valve
When door (9) is closed, the valve (10) and valve (11) are opened；
The low-temperature molten salt storage tank (2) passes sequentially through Jing Chang (13), valve (10), mixer (7), valve (11) and low-temperature molten salt
Storage tank (2) connects and composes the first circuit；
The salt storage tank (1), superheater (6), evaporator (5), mixer (7), preheater (4), low-temperature molten salt storage tank
(2) it is sequentially connected by pipeline and constitutes second servo loop.
5. a kind of fused salt heat reservoir for solar energy thermo-power station as claimed in claim 3, further include evaporator (5) and
Superheater (6)；It is characterized in that,
It is also connected by evaporator (5) and superheater (6) between the mixer (7) and salt storage tank (1)；
The valve (9) is opened, and the valve (10) and valve (11) are closed；
The Jing Chang (13), valve (9), salt storage tank (1), superheater (6), evaporator (5), mixer (7), preheater
(4), low-temperature molten salt storage tank (2) and Jing Chang (13) are sequentially connected by pipeline and constitute tertiary circuit；
Described first and second and three circuit for fused salt circulate.
6. a kind of fused salt heat reservoir for solar energy thermo-power station as claimed in claim 5, which is characterized in that
The preheater (4), evaporator (5) and superheater (6) are sequentially connected by pipeline and constitute the 4th circuit；4th circuit
Waterman's mass flow is logical；
The preheater (4) carries out heat exchange for device of working medium and the fused salt；
The evaporator (5), which is used to heat device of working medium by the fused salt, generates steam；
The superheater (6) is for being reheated the steam by the fused salt.
7. a kind of fused salt heat reservoir for solar energy thermo-power station as claimed in claim 6, which is characterized in that tell the
Four circuits further include low-pressure heater (3) and steam turbine (8)；The superheater (6) passes through steam turbine (8) and low-pressure heater
(3) preheater (4) are connected.
8. a kind of fused salt heat reservoir for solar energy thermo-power station as described in claim 1, which is characterized in that the height
The tank deck of temperature molten salt storage tank (1) and the low-temperature molten salt storage tank (2) is provided with pump for liquid salts.
9. a kind of fused salt heat reservoir for solar energy thermo-power station as claimed in claim 7, which is characterized in that described
Pump for liquid salts is liquid following formula pump for liquid salts.
10. a kind of heat change method for solar energy thermo-power station, which is characterized in that the described method includes: as power 1-7 is any
The fused salt heat reservoir for solar energy thermo-power station described in；
When running in the evening, the high-temperature molten salt of salt storage tank (1) storage is being mixed with the low-temperature molten salt from Jing Chang (13)
It is returned again by preheater (4) into low-temperature molten salt storage tank (2) or after being directly entered (11) respectively after carrying out mixing heating in device (7)
Return to (13).
11. a kind of heat change method of the fused salt heat reservoir for solar energy thermo-power station as claimed in claim 10,
It is characterized in that, the method also includes:
When operation on daytime, the high-temperature molten salt from Jing Chang (13) enters salt storage tank (1), then flows through superheater (6)
With evaporator (5)；
Steam in the high-temperature molten salt and superheater (6) carries out heat exchange, and the high-temperature molten salt carries out first time cooling, then
The water in evaporator (5) is heated to be steam again, the high-temperature molten salt carries out second and cools down, and obtains middle low-temperature molten salt；
The middle low-temperature molten salt is mixed with the high-temperature molten salt directly from salt storage tank (1) in mixer (7)；It passes through again
Jing Chang (13) are flowed into after carrying out third time cooling by preheater (4).
12. a kind of heat change method of the fused salt heat reservoir for solar energy thermo-power station as claimed in claim 10,
It is characterized in that, the method also includes:
In night operation, the valve (9) is closed；When daytime runs, the valve (9) is opened.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622335.1A CN109654756B (en) | 2018-12-28 | 2018-12-28 | Molten salt heat storage system for solar photo-thermal power station and heat exchange method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622335.1A CN109654756B (en) | 2018-12-28 | 2018-12-28 | Molten salt heat storage system for solar photo-thermal power station and heat exchange method thereof |
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| CN109654756B CN109654756B (en) | 2021-09-07 |
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Cited By (6)
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| CN110057115A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of light, electricity complementary trough photovoltaic power generation system and its operation method |
| CN110374813A (en) * | 2019-07-18 | 2019-10-25 | 青海格尔木鲁能新能源有限公司 | A kind of wind-powered electricity generation-photovoltaic-heat accumulation combined generating system |
| CN111425849A (en) * | 2020-03-20 | 2020-07-17 | 哈尔滨锅炉厂有限责任公司 | Peak-shaving pulverized coal boiler with double-layer clean energy and pulverized coal coupled |
| CN111911893A (en) * | 2019-05-07 | 2020-11-10 | 华北电力大学 | Tower type fused salt photo-thermal power station steam generator system with bypass |
| CN113669932A (en) * | 2021-08-13 | 2021-11-19 | 辽宁青碳环保科技有限公司 | Multi-space interactive high-temperature tin heat conduction device |
| CN115854565A (en) * | 2023-02-03 | 2023-03-28 | 中国电建集团河北省电力勘测设计研究院有限公司 | All-weather photo-thermal composite compressed air energy storage system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057115A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of light, electricity complementary trough photovoltaic power generation system and its operation method |
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| CN111425849A (en) * | 2020-03-20 | 2020-07-17 | 哈尔滨锅炉厂有限责任公司 | Peak-shaving pulverized coal boiler with double-layer clean energy and pulverized coal coupled |
| CN113669932A (en) * | 2021-08-13 | 2021-11-19 | 辽宁青碳环保科技有限公司 | Multi-space interactive high-temperature tin heat conduction device |
| CN113669932B (en) * | 2021-08-13 | 2024-01-30 | 辽宁青碳环保科技有限公司 | Multi-space interaction high-temperature tin heat conduction device |
| CN115854565A (en) * | 2023-02-03 | 2023-03-28 | 中国电建集团河北省电力勘测设计研究院有限公司 | All-weather photo-thermal composite compressed air energy storage system and method |
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| Publication number | Publication date |
|---|---|
| CN109654756B (en) | 2021-09-07 |
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