CN102135270A - Heat accumulation and evaporation integrated device for solar thermal power generation - Google Patents
Heat accumulation and evaporation integrated device for solar thermal power generation Download PDFInfo
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- CN102135270A CN102135270A CN2011100496376A CN201110049637A CN102135270A CN 102135270 A CN102135270 A CN 102135270A CN 2011100496376 A CN2011100496376 A CN 2011100496376A CN 201110049637 A CN201110049637 A CN 201110049637A CN 102135270 A CN102135270 A CN 102135270A
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Abstract
The invention discloses a heat accumulation and evaporation integrated device for solar thermal power generation. Spray nozzles (2), an evaporator (3), and a molten salt pump (4) are integrally arranged on a molten salt heat storage tank (1). The evaporator (3) is welded at the bottom of the molten salt heat storage tank (1) and is soaked in molten salt. The spray nozzles (2) are uniformly distributed on the liquid level of the molten salt. Water passes through the evaporator (3) from bottom to top, and natural convection of the molten salt is enhanced and thermocline is subjected to stratification in the evaporation process. A driven natural convection enhancement stratification technology is used, and the evaporator is not required to be provided with an extra pumping system and preheated for long time.
Description
Technical field
The present invention relates to a kind of heat accumulation evaporation integral device that is used for solar energy thermal-power-generating.
Background technology
The remarkable advantage that the solar energy thermal-power-generating technology is different from other renewable energy power generation technology is exactly that it can use large-scale heat-storage technology with the influence for power generation characteristics of the intermittence that overcomes solar energy and instability, make solar energy thermal-power-generating can export stable load, guarantee the stability of electrical network to electrical network.Simultaneously, the existence of thermal storage device increased the solar energy thermal-power-generating station generated energy and when generating number, reduced the cost of solar energy thermal-power-generating.The best solar energy thermal-power-generating heat-storage technology of present commercial usefulness mainly is two jars a fuse salt heat accumulation.The watery fusion salt that low temperature salt tank stores is about 290 ℃ is delivered to the high-temperature fusion salt that produces about 560 ℃ of high temperature in the heat dump by pumping system, then high-temperature fusion salt is stored in the high temperature salt cellar.When night or obnubilation, high-temperature fusion salt is pumped system and sends to the evaporimeter heat release, and watery fusion salt flows back to the low temperature salt cellar then.The major defect of this technology is the cost height, uses the fuse salt amount big.In order to address the above problem, can adopt and use single fusion salt cellar, utilize fuse salt at the different single jar of thermocline heat accumulations that can produce the fluid layering principle of different temperatures lower density.The key of single jar of thermocline heat-storage technology is the stratification and the maintenance of thermocline.Patent WO201000089, US2010031062, US4523629 have described in the fusion salt cellar float plate have been installed, and make float plate as thermocline stratification instrument, and hot fluid is on the top of float plate, and cold fluid is in the bottom of float plate.Charge and discharge that float plate can move up and down in the thermal process, stop cold fluid and hot fluid to mix the stratification state that keeps thermocline.Generally the capacity at solar energy thermal-power-generating station is very big, according to the length of heat accumulation time, need become up to ten thousand tons fuse salt, and therefore, the yardstick of thermal storage device is very big, so, adopt float plate difficulty on making and operation process very big.Describe a kind of inert solid material such as quartz sand and gravel of in the fusion salt cellar, adding among paper " Thermal Analysis of Solar Thermal Energy Storage in a Molten-Salt Thermocline " and " the Molten Salt Thermal Energy Storage in Thermoclines under Different EnvironmentBoundary Conditions ", utilized the low technology of strengthening stratification of solid material thermal conductivity factor.It is the technology that realizes stratification with foamed ceramics that patent 200710028077.X and ZL200720051634.5 have described a kind of.No matter be to use which kind of solid material to realize stratification as filler, all there is the consistency problem of material and fuse salt itself, and for the pollution problem of fuse salt.And all above-mentioned technology all need a cover high-temperature fusion salt pumping system, high-temperature fusion salt is sent to evaporimeter heat release generation water vapour, therefore, system complex cost height.Though ZL200810198461.9 has described a kind of telescopic fuse salt water evaporimeter, the heat release that can be used for high-temperature fusion salt is conducted heat,, it can't realize heat accumulation again.
In a word, existing single jar of thermocline heat accumulation all exists thermocline stratification difficulty, the extra high temperature pumping system of needs that high-temperature fusion salt is delivered to evaporimeter, the external start-up course of evaporimeter long shortcoming preheating time.
Summary of the invention
Technical problem to be solved by this invention is:
1, the thermocline stratification problem of single jar of thermocline heat accumulation;
2, thermal storage device and evaporimeter are independent, need the problem of extra pumping system;
3, the evaporimeter start-up course is long preheating time, influences the problem of power station service hours.
The scheme that the present invention solves the problems of the technologies described above employing is:
The present invention adopts a kind of heat accumulation evaporation integral device to solve the problems of the technologies described above.The present invention adopts conventional cylindrical vertical fusion salt cellar as the fuse salt heat storage can, and the size of its diameter and height is determined according to heat storage capacity.Weld a plurality of evaporimeters in the bottom of fuse salt heat storage can.A plurality of evaporimeters can adopt arrangements such as the triangle of rule, square, circle in the fusion salt cellar, spacing requires decision by the size and the maintenance of evaporation capacity.Evaporimeter is immersed in the fuse salt of fuse salt heat storage can, strengthens the thermocline stratification of fuse salt heat storage can in the process that steam takes place, and becomes active stratification technology, as: float plate, inert filler are passive type free convection stratification technology.The bottom of evaporimeter is provided with water manifold, and the bottom of water manifold is provided with cooling water inlet.Evaporimeter top is provided with steam header, and the top of steam header is provided with steam (vapor) outlet.Water manifold and steam header couple together by heat exchanger tube.The outer of evaporimeter welds together every cover and disc.Disc and water manifold weld together, by solving thermocline stratification problem every cover outward.A plurality of shower nozzles are installed between the top of fuse salt heat storage can and fuse salt liquid level.The arrangement of shower nozzle can be adopted the layouts such as triangle, square and circle of rule.Shower nozzle is installed on the high-temperature fusion salt pipeline according to conventional method.High-temperature fusion salt pipeline enters the fusion salt cellar and in the direction top set parallel with the fuse salt liquid level from fuse salt heat storage can top, according to the arrangement mode design fuse salt branching of pipes mode of shower nozzle.From the high-temperature fusion salt of heat dump from fuse salt thermal storage device top through entering the fuse salt heat storage can after the distribution of shower nozzle and the atomizing.The fusion salt pump is vertically mounted on the top of fuse salt heat storage can, and the fusion salt pump is extracted the watery fusion salt of fuse salt bottom out and delivered to the heat dump heating.The evaporimeter that is integrated in the fuse salt heat storage can is immersed in the high-temperature fusion salt, do not need extra high-temperature fusion salt pumping system that high-temperature fusion salt is delivered to evaporimeter, overcome conventional evaporimeter and be arranged on outside the heat storage can, the shortcoming that needs extra pumping system to carry high-temperature fusion salt to enter evaporimeter.Because evaporimeter is immersed in the high-temperature fusion salt always, therefore, device temperature is higher always, and the long-time preheating when not needing conventional evaporimeter to start has solved the pre-heat problem of startup of evaporimeter.Its course of work is: water conservancy project matter enters from the bottom of evaporimeter, because evaporimeter is immersed in the fuse salt thermal storage device.High-temperature fusion salt by free convection with heat transferred water, water evaporates in evaporimeter and produces HTHP and satisfy the steam that turbine parameters requires and enter steam turbine acting generating, and in thermal storage device the fuse salt of free convection, bottom temp at evaporimeter is low than the temperature on evaporimeter top, hot fluid is because the low top that swims in of density, cold fluid sinks naturally, realizes the stratification of fuse salt.Evaporimeter outer every cover free convection is limited in evaporator surface and outside between cover, thereby strengthen and the protection thermocline.
The present invention utilizes the evaporimeter cold fluid to need the characteristics of molten heat transmission evaporation, in the water evaporating course, make the fuse salt free convection in the evaporimeter outside, realize the stratification of nature, without any need for float plate or filler and pumping system, simple in structure, steamer is short start-up time, heat accumulation and evaporation integral.
Description of drawings
Fig. 1 heat accumulation evaporation integral structure drawing of device;
Fig. 2 evaporimeter front view;
Fig. 3 evaporimeter vertical view;
Among the figure: 1 fuse salt heat storage can, 2 shower nozzles, 3 evaporimeters, 4 fusion salt pumps, 5 steam headers, 6 heat exchanger tubes, 7 water manifolds, 8 supporting legs, 9 are outward every cover, 10 disc.
The specific embodiment
Fig. 1 is a heat accumulation evaporation integral structure drawing of device of the present invention.Be furnished with shower nozzle 2, evaporimeter 3 and fusion salt pump 4 in the fuse salt heat storage can 1.A plurality of shower nozzles 2 are installed between fuse salt heat storage can 1 top and the fuse salt liquid level, are positioned at more than the fuse salt liquid level, and according to the triangle of rule, square or circular even distribution.Shower nozzle is installed on the high-temperature fusion salt pipeline according to conventional method.High-temperature fusion salt pipeline enters the fusion salt cellar and in the direction top set parallel with the fuse salt liquid level from fuse salt heat storage can top, according to the arrangement mode design fuse salt branching of pipes mode of shower nozzle.The high-temperature fusion salt that comes from heat dump passes through after equally distributed shower nozzle 2 shuntings, and low speed drops equably on the fuse salt liquid level of fuse salt heat storage can 1, the low top that rests on fuse salt thermal storage device 1 naturally of high-temperature fusion salt density.The fuse salt flow and the flow velocity of shunting are lower, can prevent when fluid from entering the disturbance for fuse salt in the fuse salt heat storage can 1, the thermal stratification that helps keeping fuse salt.A plurality of evaporimeters 3 evenly distribute and are immersed in the fuse salt in the fuse salt heat storage can 1, according to arrangements such as the triangle of rule, square or circles and be welded on the bottom of fuse salt heat storage can 1.Water at low temperature enters from the bottom of evaporimeter 3, and cold water flows in evaporimeter from bottom to top, the steam of high-temperature fusion salt heating cold water generation desired parameters on every side.In the process of evaporimeter generation steam, high-temperature fusion salt on every side can naturally produce free convection, the fuse salt density of low temperature sinks to the bottom of fuse salt heat storage can 1 greatly, float to the top of fuse salt heat storage can 1 in the little meeting of high-temperature fusion salt density, in fuse salt heat storage can 1, form thermocline so naturally.The fusion salt pump 4 that is vertically mounted on fuse salt heat storage can 1 top is deep in the fuse salt always, until bottom near fuse salt heat storage can 1, extract watery fusion salt out from the bottom of fuse salt heat storage can 1, be pumped into heat absorption generation high-temperature fusion salt in the heat dump, high-temperature fusion salt flows back to the fuse salt heat storage can 1 through shower nozzle 2 again from the top of fuse salt heat storage can 1.
Fig. 2, Fig. 3 are respectively the front view and the vertical views of evaporimeter.The tube bank that the heating surface of evaporimeter 3 is made up of heat exchanger tube 6 forms.Many heat exchanger tubes 6 are arranged according to modes such as circle, triangles, and the lower end of heat exchanger tube 6 is inserted in the water manifold 7 of cylindrical sealing, and the upper end of heat exchanger tube 6 is inserted in the steam header 5 of cylindrical sealing.Have between the every heat exchanger tube 6 in the heat-exchanging tube bundle and leave enough spaces, can not closely arrange.Water manifold 7 and steam header 5 are coupled together by water pipe and steam pipe respectively, are used for supplying water and going out steam.Disc 10 is with water manifold 7 and weld together to fix every cover 9 outward.For eliminate outer every between cover 9 and the tube bank that heat exchanger tube 6 is formed owing to the different stress that may cause of swell increment, contact between disc 10 and the steam header 5 but fixing, can slide relatively, so that tube bank, water manifold 7 and steam header 5 that heat exchanger tube 6 is formed can be with respect to moving up and down every cover 9 outward.Supporting leg 8 with weld together every cover 9 and water manifold 7 outward, and be welded on the bottom of fuse salt heat storage can 1, the device 3 that avoids evaporating drifts about in fuse salt heat storage can 1.Evaporimeter 3 is together with being immersed in the fuse salt heat storage can 1 every cover 9 outward.Cold water enters from water manifold 7, molten heat transmission feedwater the becoming watery fusion salt of bottom, along with water rises in heat exchanger tube 6, gradually by high-temperature fusion salt heat temperature raising on every side, therefore, fuse salt is also high more in high more position temperature on the short transverse, outward every being the violent zone of convection current between cover 9 and the heat exchanger tube 6, the watery fusion salt of heat exchange can nature from outside flow out every cover 9 bottoms, high-temperature fusion salt from outside every the inflow of cover 9 tops, promptly realized heating, strengthened the stratification of thermocline again water.
Claims (5)
1. heat accumulation evaporation integral device that is used for solar energy thermal-power-generating, it is characterized in that: described heat accumulation evaporation integral device comprises fuse salt heat storage can (1), shower nozzle (2), evaporimeter (3) and fusion salt pump (4); Shower nozzle (2), evaporimeter (3) and fusion salt pump (4) are integrated to be installed in the fuse salt heat storage can (1); Evenly be furnished with a plurality of shower nozzles (2) in the fuse salt heat storage can (1), shower nozzle (2) is installed between the top and fuse salt liquid level of fuse salt heat storage can (1), and is positioned at more than the fuse salt liquid level; A plurality of evaporimeters (3) are immersed in the fuse salt, and are welded on fuse salt heat storage can (1) bottom, and evenly arrange.
2. according to the described heat accumulation evaporation integral device that is used for solar energy thermal-power-generating of claim 1, it is characterized in that: described evaporimeter (3) comprises the heat-exchanging tube bundle be made up of many heat exchanger tubes (6), steam header (5), water manifold (7), supporting leg (8), outward every cover (9) and disc (10); Described water manifold (7) is positioned at the bottom of described evaporimeter (3); Described steam header (5) is positioned at the top of described evaporimeter (3); Insert in the water manifold (7) lower end of described heat exchanger tube (6), and insert in the steam header (5) upper end of heat exchanger tube (6); Described water manifold (7) and outward every the cover (9) weld together by disc (10); Disc (10) with weld together also relative slip of disc (10) and steam header (5) contact outward every cover (9); Supporting leg (8) is positioned at water manifold (7) and outward on cover (9), and is welded on fuse salt heat storage can (1) bottom.
3. according to the described heat accumulation evaporation integral device that is used for solar energy thermal-power-generating of claim 2, it is characterized in that: in the described heat-exchanging tube bundle, many heat exchanger tubes (6) are arranged according to circle or triangle mode, leave the space between the every heat exchanger tube (6).
4. according to the described heat accumulation evaporation integral device that is used for solar energy thermal-power-generating of claim 1, it is characterized in that: described fusion salt pump (4) is vertically mounted on the top of fuse salt heat storage can (1), and be inserted in the fuse salt, until bottom near fuse salt heat storage can 1.
5. according to the described heat accumulation evaporation integral device that is used for solar energy thermal-power-generating of claim 1, it is characterized in that: described shower nozzle (2) is installed on the interior high-temperature fusion salt pipeline of fuse salt heat storage can (1), high-temperature fusion salt pipeline enters fusion salt cellar (1) from the top of fuse salt heat storage can (1), and in the direction top set parallel with the fuse salt liquid level.
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| CN 201110049637 CN102135270B (en) | 2011-03-01 | 2011-03-01 | Heat accumulation and evaporation integrated device for solar thermal power generation |
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| CN 201110049637 CN102135270B (en) | 2011-03-01 | 2011-03-01 | Heat accumulation and evaporation integrated device for solar thermal power generation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418917A (en) * | 2011-12-08 | 2012-04-18 | 江苏太阳宝新能源有限公司 | Solar photo-thermal power generation energy storage tank and steam generator optimized structure |
| CN107702086A (en) * | 2017-10-24 | 2018-02-16 | 西安西热节能技术有限公司 | A kind of peak regulation system and method using fuse salt heat accumulation |
| CN109307445A (en) * | 2018-10-17 | 2019-02-05 | 朱焕旺 | Fused salt spray solidification heat exchanger |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI519268B (en) * | 2015-04-16 | 2016-02-01 | 羅家慶 | Spraying heat preservation vapor supplying device and generator apparatus using such device |
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| CN2851982Y (en) * | 2005-12-06 | 2006-12-27 | 北京工业大学 | Double-medium solar high-temperature heat absorbing and storing device |
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Patent Citations (4)
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| CN2851982Y (en) * | 2005-12-06 | 2006-12-27 | 北京工业大学 | Double-medium solar high-temperature heat absorbing and storing device |
| CN201043869Y (en) * | 2007-05-18 | 2008-04-02 | 东莞理工学院 | High-temperature thermocline mixed heat accumulation device in molten salt |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418917A (en) * | 2011-12-08 | 2012-04-18 | 江苏太阳宝新能源有限公司 | Solar photo-thermal power generation energy storage tank and steam generator optimized structure |
| CN107702086A (en) * | 2017-10-24 | 2018-02-16 | 西安西热节能技术有限公司 | A kind of peak regulation system and method using fuse salt heat accumulation |
| CN107702086B (en) * | 2017-10-24 | 2023-10-20 | 西安西热节能技术有限公司 | Peak regulating system and method for storing heat by using molten salt |
| CN109307445A (en) * | 2018-10-17 | 2019-02-05 | 朱焕旺 | Fused salt spray solidification heat exchanger |
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| CN102135270B (en) | 2013-10-16 |
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