CN103485990A - Device and method for improving generating efficiency of fused salt tower type solar thermal power station - Google Patents
Device and method for improving generating efficiency of fused salt tower type solar thermal power station Download PDFInfo
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- CN103485990A CN103485990A CN201310454460.7A CN201310454460A CN103485990A CN 103485990 A CN103485990 A CN 103485990A CN 201310454460 A CN201310454460 A CN 201310454460A CN 103485990 A CN103485990 A CN 103485990A
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- heat absorber
- fused salt
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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
Abstract
A method for improving the generating efficiency of a fused salt tower type solar thermal power station comprises the steps that sunlight is reflected to a heat absorber located on the top of a heat absorbing tower by a heliostat field, fused salt in a cool tank is pumped to a heat absorber inlet vessel by a heat absorber circulating pump, the fused salt in the heat absorber inlet vessel flows through the whole heat absorber, and the fused salt is heated to be high-temperature fused salt and is conveyed to a heat absorber outlet vessel; the fused salt in the heat absorber outlet vessel flows into a hot tank through a falling pipeline based on gravity, a rotor of a hydraulic turbine at the tail end of the falling pipeline is driven by the gravitational potential energy of fused salt fluid, the kinetic energy of the rotor is converted into electric energy through a motor, and the generating capacity of the power station is increased; the high-temperature fused salt in the hot tank is sent to a steam generator through a steam generator system circulation pump for heat exchanging, and generated high pressure superheated steam drives a turbonator system to generate electricity; after heat exchanging and the fused salt is cooled, the fused salt flows back to the cool tank, and the next circulation is carried out. The invention further discloses a device for achieving the method.
Description
Technical field
The present invention relates to a kind of device that improves solar energy thermal-power-generating station generating efficiency.
The invention still further relates to a kind of method of utilizing said apparatus to realize improving solar energy thermal-power-generating station generating efficiency.
Background technique
Along with the shortage gradually of fossil fuel, renewable energy power generation on market to occupy ratio also increasing, comprising solar energy thermal-power-generating.Fused salt tower type solar energy thermal power generation station is that the settled date reflector by being arranged in ground reflexes to sunlight to be positioned on the tower top heat absorber, and tower height generally surpasses hundred meters, by liquid fused salt, solar thermal energy is collected and utilized.
Fused salt tower type solar energy thermal power generation station mainly contains following system and forms: heliostat field, fused salt heat absorber, the two hot systems of tank storage of cold/heat, steam generator system, Turbo-generator Set and cooling system.The heat-conducting medium in power station is nitrate, and composition is 40%KNO
3and 60%NaNO
3.This mixing salt approximately 220 ℃ of melting points, in Chu Leng/hot tank, the temperature of fused salt is respectively 290 ℃ and 565 ℃.In power station when operation,, heliostat will incide its surperficial sunlight and reflex to the heat absorber that is positioned at tower top, and the heat absorber recycle pump is delivered to the fused salt of 290 ℃ in cold tank on heat absorber, absorbs the solar energy that the heliostat field reflection comes.Fused salt temperature after heat absorption is heated to 565 ℃, and the power of relying on for support is got back in hot salt cellar by hot melt salt falling tube.The fused salt of storage in hot tank sent into the steam generator system heat exchange by the steam generator system recycle pump, produces high pressure superheated steam and drives the Turbo-generator Set generating, and the fused salt after heat exchange flow back in cold tank, carries out next one circulation.
The gravity impact of getting off from the decline pipeline in order to reduce hot melt salt, in prior art, hot melt salt decline pipe end is provided with the damping devices such as valve or step-down nozzle, makes the fluid full packages steady flow in its falling tube, and reaches corresponding design current velocity.But damping device has been wasted the potential difference that fuse salt falls to producing from hundred meters eminences, is not converted into available energy.
Summary of the invention
The object of the present invention is to provide a kind of device that improves fused salt tower type solar energy thermal power generation efficiency.
Another purpose of the present invention is to provide a kind of method of utilizing said apparatus to realize improving fused salt tower type solar energy thermal power generation efficiency.
For achieving the above object, the device of the generating efficiency at raising fused salt tower type solar energy thermal power generation provided by the invention station comprises:
One heliostat field, reflex to heat absorber by sunlight;
One stores the cold tank of fused salt, by the heat absorber recycle pump, is connected to heat absorber, and is connected to a hot tank that stores fused salt through the heat absorber exit vessel by the decline pipeline;
Hot tank is connected to steam generator system by the steam generator system recycle pump, and steam generator system is connected to cold tank by pipeline;
Steam generator system connects steam turbine generator system by pipeline;
Wherein, the end of decline pipeline is equipped with the rotor of hydraulic turbine.
In described device, each heliostat in heliostat field is by rotating sunlight is reflexed to heat absorber around twin shaft.
In described device, heat absorber is arranged on the tower top of heat absorption tower.
In described device, the heat absorber recycle pump is connected heat absorber by increase in pipeline with heat absorber import container.
The method of utilizing said apparatus to improve fused salt tower type solar energy thermal power generation station generating efficiency provided by the invention:
By heliostat field, sunlight is reflexed to the heat absorber that is positioned at the heat absorption column overhead, the heat absorber recycle pump by the pump for liquid salts in cold tank to heat absorber import container, the fused salt of the heat absorber import container whole heat absorber of flowing through, make the temperature of fused salt stream be heated as high-temperature molten salt and be transported to the heat absorber exit vessel;
The fused salt power of relying on for support in the heat absorber exit vessel flows in hot tank by the decline pipeline, driven the rotor of the hydraulic turbine of decline pipe end by the gravitational potential energy of fused salt fluid, the kinetic energy of this rotor is converted into to electric energy by motor, when reducing the impact of high-temperature molten salt gravity flow to hot tank, utilize hydraulic turbine to reclaim potential energy, increase the generated energy in power station;
High-temperature molten salt in hot tank is delivered to steam generator system by the steam generator system recycle pump and is carried out heat exchange, and the high pressure superheated steam of generation drives the steam turbine generator system generating; After heat exchange, the temperature of fused salt by by flowing back in cold tank by pipeline after cooling, is carried out next circulation.
In described method, the temperature of molten salt in cold tank is 270-320 ℃.
In described method, the temperature of high-temperature molten salt is 500-600 ℃.
In described method, the heat absorber recycle pump by increase in pipeline by the pump for liquid salts in cold tank to heat absorber import container.
Apparatus and method provided by the invention, be the hot melt salt potential energy that adopts the hydraulic turbine recovery to get off from overhead streams, utilizes the water turbine principle that potential energy is converted into to available energy.This not only can make the system fluid steady flow, reaches design current velocity, thereby guarantees security of system; Also effective recovered energy, improve the generating efficiency in power station.
The accompanying drawing explanation
Fig. 1 is known fused salt tower type solar photothermal power generation station schematic diagram.
Fig. 2 is electric power station system schematic diagram of the present invention.
Primary clustering symbol description in accompanying drawing:
1 heliostat field, 2 cold tanks, 3 heat absorber recycle pumps, 4 increase in pipeline, 5 heat absorber import containers, 6 heat absorbers, 7 heat absorber exit vessels, 8 decline pipelines, 9 step-down nozzles, 9 ' hydraulic turbine, 10 hot tanks, 11 steam generator system recycle pumps, 12 steam generator systems, 13 steam turbine generator systems, 14 pipelines, 15 heat absorption towers
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in more detail:
Fig. 1 is the basic running principle in known fused salt tower type solar energy thermal power generation station adopted at present.Each heliostat of heliostat field 1 reflexes to by the sunlight in per moment the heat absorber 6 that is positioned at heat absorption tower 15 tower tops by rotating around twin shaft, heat absorber recycle pump 3 passes through increase in pipeline 4 pumps to heat absorber import container 5 by the fused salt in cold tank 2, then the fused salt of the heat absorber import container 5 whole heat absorber 6 of flowing through, it is 565 ℃ that the temperature that fused salt is flowed is heated to design temperature by 290 ℃, is transported to heat absorber exit vessel 7.The high-temperature molten salt power of relying on for support in heat absorber exit vessel 7 flows to 10 li, hot tank by hot melt salt decline pipeline 8; in order to make the fluid full packages steady flow in its decline pipeline 8; and reach corresponding design current velocity; need be at damping devices such as decline pipeline 8 end mounted valves or step-down nozzles 9, and then the reliable operation of protective system.High-temperature molten salt in hot tank 10 is delivered to steam generator system 12 by steam generator system recycle pump 11 and is carried out heat exchange, produces high pressure superheated steam and drives steam turbine generator system 13 generatings; After heat exchange, the temperature of fused salt will be cooled to 290 ℃, by pipeline 14, flow back in cold tank 2, carry out next circulation.
Fig. 2 is structural representation of the present invention, it is the improvement of doing on the basis at known fused salt tower type solar energy thermal power generation station, concrete improvements are hydraulic turbine 9 ' to be installed to replace step-down nozzle 9 damping devices such as grade at the end of known fused salt tower type solar energy thermal power generation station hot melt salt decline pipeline 8, the flow through rotor of hydraulic turbine 9 ' of pipeline 8 ends of the fused salt flow down by heat absorber exit vessel 7, by hydraulic turbine, the high potential energy of fused salt is reclaimed, improve the generating efficiency in power station.When making system stable operation reach design current velocity, and utilize the water turbine principle, and this rotor kinetic energy is converted into to electric energy by motor, increase the generated energy in power station, or drag other equipment minimizing station services by other mechanical transmissions, thereby improve the generating efficiency in power station.The structure of this rotor is known device, identical with heat absorber recycle pump 3, and just working principle is contrary.Hydraulic turbine 9 ' can be installed on hot tank 10 tank deck tops.
By said apparatus and method, can reduce station service, and then improve the generating efficiency in power station.
Claims (8)
1. a device that improves the generating efficiency at fused salt tower type solar energy thermal power generation station comprises:
One heliostat field, reflex to heat absorber by sunlight;
One stores the cold tank of fused salt, by the heat absorber recycle pump, is connected to heat absorber, and is connected to a hot tank that stores fused salt through the heat absorber exit vessel by the decline pipeline;
Hot tank is connected to steam generator system by the steam generator system recycle pump, and steam generator system is connected to cold tank by pipeline;
Steam generator system connects steam turbine generator system by pipeline;
Wherein, the end of decline pipeline is equipped with the rotor of hydraulic turbine.
2. device according to claim 1, wherein, each heliostat in heliostat field is by rotating sunlight is reflexed to heat absorber around twin shaft.
3. device according to claim 1 and 2, wherein, heat absorber is arranged on the tower top of heat absorption tower.
4. device according to claim 1, wherein, the heat absorber recycle pump is connected heat absorber by increase in pipeline with heat absorber import container.
5. a method of utilizing the described device of claim 1 to improve fused salt tower type solar energy thermal power generation station generating efficiency:
By heliostat field, sunlight is reflexed to the heat absorber that is positioned at the heat absorption column overhead, the heat absorber recycle pump by the pump for liquid salts in cold tank to heat absorber import container, the fused salt of the heat absorber import container whole heat absorber of flowing through, make the temperature of fused salt stream be heated as high-temperature molten salt and be transported to the heat absorber exit vessel;
The fused salt power of relying on for support in the heat absorber exit vessel flows in hot tank by the decline pipeline, driven the rotor of the hydraulic turbine of decline pipe end by the gravitational potential energy of fused salt fluid, the kinetic energy of this rotor is converted into to electric energy by motor, when reducing the impact of high-temperature molten salt gravity flow to hot tank, utilize hydraulic turbine to reclaim potential energy, increase the generated energy in power station;
High-temperature molten salt in hot tank is delivered to steam generator system by the steam generator system recycle pump and is carried out heat exchange, and the high pressure superheated steam of generation drives the steam turbine generator system generating; After heat exchange, the temperature of fused salt by by flowing back in cold tank by pipeline after cooling, is carried out next circulation.
6. method according to claim 5, wherein, the temperature of molten salt in cold tank is 270-320 ℃.
7. method according to claim 5, wherein, the temperature of high-temperature molten salt is 500-600 ℃.
8. method according to claim 5, wherein, the heat absorber recycle pump by increase in pipeline by the pump for liquid salts in cold tank to heat absorber import container.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649900A (en) * | 2016-03-10 | 2016-06-08 | 北京首航艾启威节能技术股份有限公司 | System for efficiently reducing auxiliary power of molten-salt tower type solar photo-thermal power generation station |
| CN105650892A (en) * | 2016-03-14 | 2016-06-08 | 北京首航艾启威节能技术股份有限公司 | Indirect cooling central system for tower type photo-thermo-electric station |
| CN106796051A (en) * | 2014-10-06 | 2017-05-31 | 巴布考克及威尔考克斯公司 | With the modularization fused salt solar column for technique or the heat storage of generating or cogeneration of heat and power |
| CN109357418A (en) * | 2018-09-21 | 2019-02-19 | 上海电气集团股份有限公司 | A kind of cylinder formula fused salt heat absorber device and starting method |
| US10358944B2 (en) | 2015-02-05 | 2019-07-23 | Basf Se | Solar power plant comprising a first heat transfer circuit and a second heat transfer circuit |
| CN112594947A (en) * | 2020-12-16 | 2021-04-02 | 浙江中控太阳能技术有限公司 | Downcomer, downcomer group and heat absorption system |
| CN113217939A (en) * | 2021-04-28 | 2021-08-06 | 西安热工研究院有限公司 | System and method for improving inlet air temperature and fuel heat value of garbage power station by tower-type solar energy |
| CN113432319A (en) * | 2021-05-27 | 2021-09-24 | 浙江中控太阳能技术有限公司 | Solar heat absorption system, photo-thermal power station and operation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106796051A (en) * | 2014-10-06 | 2017-05-31 | 巴布考克及威尔考克斯公司 | With the modularization fused salt solar column for technique or the heat storage of generating or cogeneration of heat and power |
| US10358944B2 (en) | 2015-02-05 | 2019-07-23 | Basf Se | Solar power plant comprising a first heat transfer circuit and a second heat transfer circuit |
| CN105649900A (en) * | 2016-03-10 | 2016-06-08 | 北京首航艾启威节能技术股份有限公司 | System for efficiently reducing auxiliary power of molten-salt tower type solar photo-thermal power generation station |
| CN105650892A (en) * | 2016-03-14 | 2016-06-08 | 北京首航艾启威节能技术股份有限公司 | Indirect cooling central system for tower type photo-thermo-electric station |
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| CN112594947A (en) * | 2020-12-16 | 2021-04-02 | 浙江中控太阳能技术有限公司 | Downcomer, downcomer group and heat absorption system |
| CN113217939A (en) * | 2021-04-28 | 2021-08-06 | 西安热工研究院有限公司 | System and method for improving inlet air temperature and fuel heat value of garbage power station by tower-type solar energy |
| CN113217939B (en) * | 2021-04-28 | 2022-10-25 | 西安热工研究院有限公司 | Tower type solar system for improving air inlet temperature and fuel heat value of garbage power station |
| CN113432319A (en) * | 2021-05-27 | 2021-09-24 | 浙江中控太阳能技术有限公司 | Solar heat absorption system, photo-thermal power station and operation method |
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Application publication date: 20140101 |