CN102734929B - Molten salt heating and discharging system for solar thermal power - Google Patents
Molten salt heating and discharging system for solar thermal power Download PDFInfo
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- CN102734929B CN102734929B CN201210210082.3A CN201210210082A CN102734929B CN 102734929 B CN102734929 B CN 102734929B CN 201210210082 A CN201210210082 A CN 201210210082A CN 102734929 B CN102734929 B CN 102734929B
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Abstract
The invention relates to a molten salt heating and discharging system for solar thermal power. The system comprises molten salt storage equipment, a heat exchange system and molten salt heating and discharging equipment, wherein the molten salt storage equipment, the heat exchange system and the molten salt heating and discharging equipment form a sealed system through pipelines. The molten salt heating and discharging equipment comprises a molten salt bath and a molten salt furnace, the molten salt bath and the molten salt furnace are communicated through a pipeline; the molten salt storage equipment consists of one or two or more than two molten salt storage tanks; a plurality of molten salt storage tanks are connected with one another through pipelines, and the pipelines are provided with a heat exchanger system. According to the molten salt heating and discharging system for the solar thermal power, molten salt can be molten before a solar-thermal power station is put into production and can be heated during running of the solar-thermal power station; and simultaneously, in emergency situation and long-term rainy or snowy weather, the molten salt in a heat exchanger can be discharged, and problems that molten salt in the heat exchanger is laid aside for a long time, crystallized and solidified are solved.
Description
Technical field
The present invention relates to photo-thermal power generation energy storage field, relate in particular in photo-thermal power generation energy-storage system, fused salt heating and exhaust system.
Background technology
Paraboloid trough type system is the most ripe, the most widely used solar light-heat power-generation technology of current technology.System is mainly comprised of solar energy heat-collection field, steam turbine TRT and energy-storage system.By day, optically focused reflection groove in heat collecting field by sunshine reflect focalization to thermal-collecting tube, the synthetic heat-conducting oil heating flowing in pipe is arrived to approximately 400 ℃, part high temperature heat conductive oil is transported to steam generator, produce the steam turbine generating that steam drive is traditional, another part high temperature heat conductive oil is transported in the heat exchanger of energy-storage system, and thermal energy transfer, to energy-accumulating medium-fused salt, and is stored.At night, fused salt is transferred to conduction oil by heat exchanger again by heat, for generating.
In practice, in order to extend generating dutation, raising generated energy, the reduction cost of electricity-generating of solar power station, in energy-storage system, the reserves of fused salt are generally tens thousand of tons.At present, the fused salt using in photo-thermal power station is binary nitrate (KNO
3+ NaNO
3), fusing point is about 220 ℃, adopts saturated vapor mode of heating, and steam pipe coil wall thickness is very thick, and therefore, in some large-scale demonstrative projects of building, solar-electricity stands in before operation, conventionally adopts electrically heated mode to melt fused salt; During operation, fused salt storage tank adopts electric tracing mode to heat.The problems such as this measure exists and involves great expense, maintenance difficult.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of photo-thermal power generation energy-storage system fused salt heating and exhaust system, can solve the problems such as fused salt operation thawing, run duration heating, simultaneously, solution is during system burst situation and long-time sleety weather, the discharge of fused salt in heat exchanger, avoids that fused salt in heat exchanger is shelved for a long time, crystallization, the problem such as solidifies.
The technical solution adopted in the present invention is: a kind of photo-thermal generating molten salt heating and exhaust system, comprise fused salt storage tank equipment, heat-exchange system and fused salt heating exhaust apparatus, and between described three, by pipeline, form an airtight system; Described fused salt heating exhaust apparatus comprises fused salt groove and molten salt furnace, and described fused salt groove and molten salt furnace pass through pipeline connection; Described fused salt storage tank equipment is one or two or plural fused salt storage tank; Between a plurality of fused salt storage tanks, by pipeline, connect, on described pipeline, be provided with heat-exchange system.
Further, fused salt groove of the present invention is positioned at the extreme lower position of whole system, while being convenient to pump for liquid salts parking, in transfer conduit and molten salt furnace coil pipe, liquid fused salt is back to fused salt groove, and fused salt groove top is provided with dog-house, electric heater, pump for liquid salts and return line; Described fused salt groove inside is provided with porous barrier, avoids solid fused salt particle to enter pump for liquid salts workspace, causes pump for liquid salts to damage; Fused salt groove bottom is provided with evagination end socket, is welded with pipeline on end socket, and is provided with valve.
For temperature and the liquid level of monitoring fused salt groove that can be promptly and accurately, fused salt groove of the present invention top is also provided with temperature and takes into account liquid level gauge; Described thermometer and the probe of liquid level gauge stretch in fused salt groove.
Specifically, molten salt furnace of the present invention is efficient many return stroke verticals coil arrangement, molten salt furnace top is provided with burner, molten salt furnace inside is provided with many backhauls spiral coil, molten salt furnace bottom entrance is connected with the outlet of fused salt groove by pipeline, and the outlet of molten salt furnace top is connected with fused salt storage tank and fused salt groove respectively by pipeline and triple valve.
Fused salt storage tank of the present invention top is respectively equipped with pump for liquid salts, and pump tap line is connected with fused salt transfer conduit, backflow tap line by tee pipe fitting, and backflow tap line is provided with valve.
Heat-exchange system of the present invention comprises a plurality of conduction oil/fused salt heat exchanging devices and supporting bracket thereof, and adjacent heat exchanger links together by pipeline; The connected pipeline of heat exchanger bottom is provided with three-way valve, and is connected with fused salt groove by pipeline.
The connecting line of described whole system all has flexibility and gradient from the horizontal by the angle of inclination of 5-10 °.
The invention has the beneficial effects as follows: before going into operation in power station, Powdered fused salt melts the stage, adopts the liquid fused salt through heating in molten salt furnace, is back to fused salt groove, the thermal source melting as Powdered fused salt, accelerates fused salt and melts process, reduces energy consumption; After operation, empty the liquid fused salt in heat exchanger and pipeline; Sleety weather, heating fused salt, avoids solidifying, and guarantees that photo-thermal power generation energy storage continues efficient operation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the preferred embodiments of the present invention;
In figure: 1, fused salt groove; 2, dog-house; 3, agitator; 4, electric heater; 5, porous barrier; 6,14 and 18, pump for liquid salts; 7,15 and 19, valve; 8, liquid level gauge; 9, thermometer; 10, molten salt furnace; 11, burner; 12, coil pipe; 13 and 17, three-way valve; 16, heat exchanger; 20, pipeline; 21 and 22, fused salt storage tank; 23, pump tap line; 24, fused salt transfer conduit; 25, backflow tap line.
The specific embodiment
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention is only described in a schematic way, so it only show the formation relevant with the present invention.
Shown in Fig. 1 is a kind of photo-thermal generating molten salt heating and exhaust system, comprises fused salt storage tank equipment, heat-exchange system and fused salt heating exhaust apparatus, between three, by pipeline, forms an airtight system; Fused salt heating exhaust apparatus comprises fused salt groove and molten salt furnace, and fused salt groove and molten salt furnace pass through pipeline connection; Fused salt storage tank equipment is two fused salt storage tanks; Between two fused salt storage tanks, by pipeline, connect, on pipeline, be provided with heat-exchange system.
Workflow of the present invention is:
Fused salt melting process:
Before going into operation in photo-thermal power station, pulverous mixed inorganic is put into fused salt groove 1 by dog-house 2, by electric heater 4 by solid fused salt heating and melting, turn on agitator 3, liquid temperature of molten salt is evenly distributed, and sees through porous barrier 5, in fused salt groove, form homogeneous liquid level, observe thermometer 9 indicating values, guarantee that temperature of molten salt is higher than 50 ℃～80 ℃ of fusing points.Meanwhile, the blank panel pipe 12 of opening in 11 pairs of molten salt furnaces 10 of burner carries out preheating, solidifies when preventing that fused salt from flowing through cooling coil.After coil pipe 12 is preheating to a certain degree, open pump for liquid salts 6, fused salt is sent into molten salt furnace 10 heating, the part fused salt that is heated to assigned temperature is transported to low-temperature storage tank 22 by triple valve 13, part fused salt is back to fused salt groove 1, as the thermal source of the Powdered fused salt of follow-up input, accelerate thawing process.
After treating the whole heating and melting of the required fused salt in power station, observe liquid level gauge 8 indicating values, while approaching fused salt groove 1 minimum liquid level, close burner 11 and pump for liquid salts 6, the liquid fused salt in transfer conduit and molten salt furnace coil pipe, by Action of Gravity Field, all let out in the fused salt groove 1 of melt back salt system extreme lower position, then open valve 7, the liquid fused salt by accumulating in fused salt groove 1, emits, after filtering, solidifying, pulverize, as the ullage compensation of the follow-up salt melting system in power station.
Fused salt discharge process:
After going into operation in photo-thermal power station, system normal operation period.After the heat-transfer fluid conduction oil heat exchange in the fused salt in energy-storage system and power station, or chance emergency situations, open valve 15 and 19, two heat exchangers in heat-exchange system two ends and the liquid fused salt in pipeline pass through Action of Gravity Field, adjacent cold from letting out back respectively, hot melt salt storage tank, open three-way valve 17 and 13, heat exchanger package in heat-exchange system middle part and the liquid fused salt in pipeline pass through Action of Gravity Field, from letting out melt back salt bath 1, then, open burner 11, preheat coil 12, open pump for liquid salts 6 and valve 13, send the liquid fused salt in fused salt groove 1 back to low-temperature molten salt storage tank 22.Observe liquid level gauge 8 indicating values, while approaching fused salt groove minimum liquid level, close burner 11 and pump for liquid salts 6, liquid fused salt in transfer conduit and molten salt furnace coil pipe, all lets out by Action of Gravity Field in the fused salt groove 1 of melt back salt system extreme lower position, then opens valve 7, by the liquid fused salt accumulating in fused salt groove 1, emit, after filtering, solidifying, pulverize, as the ullage compensation of the follow-up salt melting system in power station.
Fused salt heating process:
After going into operation in photo-thermal power station, when running into long sleety weather, the fused salt in the fused salt in storage tank, especially low-temperature storage tank, needs heating and thermal insulation, prevents that it from solidifying.Valve-off 19, Open valve 17 and 13, starts pump for liquid salts 18, and the fused salt in storage tank is transported in fused salt groove 1, turn on agitator 3 and electric heater 4, observe the indicating value of thermometer 9, treat temperature of molten salt be heated to temperature required after, open burner 11, preheat coil, then start pump for liquid salts 6, by flow in pipes 20, send liquid fused salt back to low-temperature molten salt storage tank 22.Observe liquid level gauge 8 indicating values, while approaching fused salt groove minimum liquid level, close burner 11 and pump for liquid salts 6, liquid fused salt in transfer conduit and molten salt furnace coil pipe, all lets out by Action of Gravity Field in the fused salt groove 1 of melt back salt system extreme lower position, then opens valve 7, by the liquid fused salt accumulating in fused salt groove 1, emit, after filtering, solidifying, pulverize, as the ullage compensation of the follow-up salt melting system in power station.
Just the specific embodiment of the present invention of describing in above description, various not illustrating is construed as limiting flesh and blood of the present invention, person of an ordinary skill in the technical field read after description can to before the described specific embodiment make an amendment or be out of shape, and do not deviate from essence of an invention and scope.
Claims (5)
1. photo-thermal generating molten salt heating and an exhaust system, is characterized in that: comprise fused salt storage tank equipment, heat-exchange system and fused salt heating exhaust apparatus, between three, by pipeline, form an airtight system; Described fused salt heating exhaust apparatus comprises fused salt groove and molten salt furnace, and described fused salt groove and molten salt furnace pass through pipeline connection; Described fused salt storage tank equipment is one or two or above fused salt storage tank; Between a plurality of fused salt storage tanks, by pipeline, connect, on described pipeline, be provided with heat-exchange system; Described molten salt furnace is many return stroke verticals coil arrangement, molten salt furnace top is provided with burner, molten salt furnace inside is provided with many backhauls spiral coil, molten salt furnace bottom entrance is connected with the outlet of fused salt groove by pipeline, and the outlet of molten salt furnace top is connected with fused salt storage tank and fused salt groove respectively by pipeline and triple valve; Described fused salt storage tank top is respectively equipped with pump for liquid salts, and pump tap line is connected with fused salt transfer conduit, backflow tap line by tee pipe fitting, and backflow tap line is provided with valve.
2. photo-thermal generating molten salt heating as claimed in claim 1 and exhaust system, is characterized in that: described fused salt groove is positioned at the extreme lower position of whole system, and fused salt groove top is provided with dog-house, electric heater, pump for liquid salts and return line; Described fused salt groove inside is provided with porous barrier; Fused salt groove bottom is provided with evagination end socket, is welded with pipeline on end socket, and is provided with valve.
3. photo-thermal generating molten salt heating as claimed in claim 2 and exhaust system, is characterized in that: described fused salt groove top is also provided with temperature and takes into account liquid level gauge; Described thermometer and the probe of liquid level gauge stretch in fused salt groove.
4. photo-thermal generating molten salt heating as claimed in claim 1 and exhaust system, is characterized in that: described heat-exchange system comprises a plurality of conduction oil/fused salt heat exchanging devices and supporting bracket thereof, and adjacent heat exchanger links together by pipeline; The connected pipeline of heat exchanger bottom is provided with three-way valve, and is connected with fused salt groove by pipeline.
5. photo-thermal generating molten salt as claimed in claim 1 heating and exhaust system, is characterized in that: the connecting line of system is from the horizontal by the angle of inclination of 5-10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210210082.3A CN102734929B (en) | 2012-06-21 | 2012-06-21 | Molten salt heating and discharging system for solar thermal power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210210082.3A CN102734929B (en) | 2012-06-21 | 2012-06-21 | Molten salt heating and discharging system for solar thermal power |
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| CN102734929A CN102734929A (en) | 2012-10-17 |
| CN102734929B true CN102734929B (en) | 2014-10-01 |
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| CN201210210082.3A Active CN102734929B (en) | 2012-06-21 | 2012-06-21 | Molten salt heating and discharging system for solar thermal power |
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| AU2014224654B2 (en) * | 2013-03-06 | 2018-09-20 | Basf Se | Pipeline system comprising an emptying container for receiving a liquid flowing through a pipeline system |
| CN103292485B (en) * | 2013-05-09 | 2014-11-26 | 东方电气集团东方锅炉股份有限公司 | Fused salt heat storage and exchange system for solar thermal power generation |
| MA39215B1 (en) * | 2014-01-24 | 2018-12-31 | Basf Se | Pipe system for solar power station |
| CN103756692B (en) * | 2014-02-14 | 2015-11-25 | 南京华电节能环保设备有限公司 | Riser waste heat recovery device for coke oven |
| CN104633961A (en) * | 2014-12-31 | 2015-05-20 | 兰州大成聚光能源科技有限公司 | Solar high-temperature heat output system |
| CN104806454A (en) * | 2014-12-31 | 2015-07-29 | 深圳市爱能森科技有限公司 | Wind power, photo-thermal and medium heat storage combined energy supply system |
| CN105157252A (en) * | 2015-08-21 | 2015-12-16 | 中国东方电气集团有限公司 | Fused salt heat compensation control method for slot type solar-thermal power generation system |
| CN106090853A (en) * | 2016-06-27 | 2016-11-09 | 杭州锅炉集团股份有限公司 | The fused salt heat reservoir of wind problem is abandoned in a kind of reply |
| CN106362649A (en) * | 2016-10-09 | 2017-02-01 | 深圳市爱能森科技有限公司 | Movable salt dissolving system |
| CN106281255A (en) * | 2016-10-20 | 2017-01-04 | 中投亿星红日太阳能科技有限公司 | A kind of fused salt mixt is prepared, is melted and fill system |
| CN106705726B (en) * | 2016-11-23 | 2018-08-14 | 中国科学院电工研究所 | A kind of experiment fuse salt storage tank |
| CN106766892B (en) * | 2017-03-07 | 2023-06-20 | 杭州嘉悦智能设备有限公司 | Heat transfer energy storage molten salt melting and loading process and system equipment |
| CN108053073A (en) * | 2017-12-23 | 2018-05-18 | 中国电力工程顾问集团西北电力设计院有限公司 | The optimization method of photo-thermal power station heat accumulation duration and electrical heating power containing electric heater unit |
| CN108120022B (en) * | 2018-01-17 | 2023-06-02 | 东方电气集团东方锅炉股份有限公司 | Molten salt heating device and method in heat storage system |
| CN108224779A (en) * | 2018-03-18 | 2018-06-29 | 唐山山岛石油化学有限公司 | High condensation point heat carrier heat exchange pipe network device and application method |
| CN108981162A (en) * | 2018-06-06 | 2018-12-11 | 朱焕旺 | A kind of fused salt circular flow technique |
| CN110243085B (en) * | 2019-05-24 | 2021-02-23 | 浙江中控太阳能技术有限公司 | Double-high-temperature molten salt storage tank system of solar thermal power station |
| CN111780607A (en) * | 2020-07-24 | 2020-10-16 | 青海民族大学 | Solid-state fused salt energy storage tank |
| CN113274949A (en) * | 2021-06-23 | 2021-08-20 | 北京蓝海翌能新能源集团有限公司 | Salt melting system of molten salt thermal energy storage power station |
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Denomination of invention: Molten salt heating and discharging system for solar thermal power Effective date of registration: 20150728 Granted publication date: 20141001 Pledgee: Jiangsu province Wujin Agricultural Expo investment and Development Co. Ltd. Pledgor: Changzhou Sunhome Solar Water Heater Manufacture Co., Ltd. Registration number: 2015320000007 |
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