CN204984748U - Dual heat -retaining solar thermal power generation system of fuse salt and conduction oil - Google Patents
Dual heat -retaining solar thermal power generation system of fuse salt and conduction oil Download PDFInfo
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- CN204984748U CN204984748U CN201520598165.3U CN201520598165U CN204984748U CN 204984748 U CN204984748 U CN 204984748U CN 201520598165 U CN201520598165 U CN 201520598165U CN 204984748 U CN204984748 U CN 204984748U
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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
The utility model discloses a dual heat -retaining solar thermal power generation system of fuse salt and conduction oil, contain solar collecting system, fused salt heat -retaining system, steam generation system and steam turbine power generation system, steam turbine power generation system and steam generation headtotail, fused salt heat -retaining system and steam generation system all connect solar collecting system, and fused salt heat -retaining system and steam generation system are parallelly connected to be set up, solar collecting system sets up high temperature to the steam generation intersystem and cushions oil tank and oil pump, when solar radiation fluctuates in short -term, the setting of high temperature buffering oil tank, can not arouse the generated energy sudden change of the temperature and the turbo generator system of steam in the steam generation system, the liquid level that only is high temperature buffering oil tank has slow change, even the conduction oil liquid level in the high temperature buffering oil tank descends morely, still can be by exothermic compensation of fused salt heat -retaining system, control system has the control that the sufficient time can be calm, not only the thermal efficiency is high, and generated energy stability is good.
Description
Technical field
The utility model relates to the solar parabolic through power generation system of a kind of slot type fuse salt heat-accumulation solar heat generating system, particularly a kind of fuse salt and conduction oil two kinds of heat accumulation forms.
Background technique
Trough type solar power generation full name is " generating of groove type paraboloid light collection solar ", its device a kind of reflected by sunlight by groove type paraboloid reflecting mirror and focus on heat collecting pipe, heat-conducting fluid in heating heat collecting pipe, in pipe, water is heated into water vapor by heat-exchange system by heat-conducting fluid, drives the clean energy resource utilized device of Turbo-generator Set generating.
Existing solar parabolic through power generation system mainly comprises following four subtense angles.
(1) thermal-arrest subtense angle, is the core of system, is made up of groove type paraboloid reflecting mirror, receiver and tracking means.Hot receiver adopts electron tubes type, and tracking mode adopts one dimension to follow the tracks of, and adopts north-south arrangement.Its Main Function is absorb solar heat.
(2) steam generation subtense angle, is made up of preheater, steam generator, superheater and reheater.When working medium is conduction oil, adopts double loop, after namely conduction oil is heated in receiver, enter in steam generation subtense angle and produce superheated vapor, superheated vapor enters the generating of turbine generator subtense angle.
(3) power generation sub-system, fundamental composition and conventional power generation usage equipment similar, but need to configure a kind of dedicated control device, for the switching between solar heating system and auxiliary energy system, or for solar heating system and supplementary energy heating system hybrid working.
(4) heat accumulation subtense angle, under nighttime conditions, the energy that solar heat power generation system can rely on hot energy-storage system to store maintains system and normally runs the regular hour.
Existing a kind of solar parabolic through power generation system as shown in Figure 1, the feature of this system is that conduction oil flows through collecting system 11, fused salt heat reservoir 12 and steam generating system 13.Conduction oil is heat-absorbing medium in solar thermal collection system, is heat release and heat-absorbing medium, at steam generating system 13 as exothermic medium in fused salt heat reservoir 12.The heat of conduction oil comes from collecting system and absorbs solar radiation.To a certain extent, temperature and the flow of conduction oil change with the change of solar radiation, and then cause the change of steam generating system 13 steam parameter, easily cause the fluctuation of load that turbine generator system 14 is exerted oneself.Although be configured with power generation molten salt energy storage system 13 in system, energy storage device can be called when generation fluctuation exerted oneself by steam turbine and eliminate fluctuation of load, but fused salt heat reservoir 12 proceeds to exothermic phase need certain hour by filling the heat stage, the load variations of steam turbine cannot be eliminated during this period of time, therefore the generated energy of generator will inevitably be suddenly big or suddenly small, unstable.Great difficulty is added to Control of Power Plant.
Another kind of existing solar parabolic through power generation system as shown in Figure 2, conduction oil is heated to 390 DEG C by 290 DEG C in groove type solar collecting system 21,390 DEG C of conduction oils enter fused salt heat reservoir 22 heat release, 286 DEG C of fused salts in low-temperature molten salt storage tank 222 are delivered to conduction oil-fused salt heat exchanging device 223 to enter salt storage tank 221 after being heated to 386 DEG C and store, and the conduction oil after heat release becomes 290 DEG C, get back to heat collecting field and absorb heat.Meanwhile, 386 DEG C of high-temperature molten salts in salt storage tank 221, are pumped into heated feed water in steam generating system 23 by high-temperature molten salt, produce water vapour promotion Turbo-generator Set 24 and generate electricity.The exhaust steam produced after generating becomes water of condensation after condensation, is sent in steam generating system carry out new round heat absorption by condensate pump.
Compared with the structure of Fig. 1, solar thermal collection system 21 and steam generating system 23 are separated, fused salt heat reservoir plays the effect of a heat " buffer memory ", namely the conduction oil Parameters variation caused due to solar radiation fluctuation can not have an impact to the steam parameter that steam generating system produces, and is only that in fused salt heat reservoir, in heat storage can, fuse salt liquid level changes along with the change of conduction oil parameter.This greatly improves the stability that dynamic power island electric load exports, and greatly reduces fluctuation of load, improves the operability that power station entirety controls.But its shortcoming is, high temperature heat conductive oil is 390 DEG C, fused salt can only be heated to 386 DEG C of (different design of heat exchanger, temperature value is different, generally, wants to be heated to higher temperature, the price of heat exchanger can be more expensive), have lost 4 DEG C, and then remove heating water with the fused salt of 386 DEG C, according to the end difference principle of heat exchanger, water is heated into the water vapour of T1 DEG C, the certain <386 DEG C of T1, and for steam turbine, the temperature of water vapour is lower, and efficiency is lower.Therefore this scheme, although improve the stability of generating, generated energy can not be fluctuated, and system effectiveness have dropped.
Model utility content
Solved technical problem of the present utility model namely providing that a kind of thermal efficiency is high, the fuse salt of generated energy good stability and the dual heat-accumulation solar heat generating system of conduction oil.
The technological means that the utility model adopts is as described below.
A kind of fuse salt and the dual heat-accumulation solar heat generating system of conduction oil, comprise collecting system, fused salt heat reservoir, steam generating system and turbine generating system, turbine generating system is connected with steam generating system, described fused salt heat reservoir is all connected collecting system with steam generating system, and fused salt heat reservoir and steam generating system are arranged in parallel, high-temperature buffer oil tank is set between collecting system to steam generating system.
Oil pump is established between described high-temperature buffer oil tank and steam generating system.
Described fused salt heat reservoir, comprise the salt storage tank, conduction oil-fuse salt heat exchanger and the low-temperature molten salt storage tank that are connected successively, collecting system is connected with conduction oil fuse salt heat exchanger, forms thermal-arrest-heat accumulation loop.
Oil pump and oil expansion tank are established in the loop that described conduction oil-fuse salt heat exchanger and steam generating system share, conduction oil-the pipeline of fuse salt heat exchanger before oil expansion tank establishes the first control switch, conduction oil-fuse salt heat exchanger establish another bar pipeline be connected to oil pump after and on this pipeline, establish the second control switch.
The beneficial effect that the utility model produces: owing to being provided with high-temperature buffer oil tank, during solar radiation short-time fluctuations, high-temperature buffer oil tank is sustainable provides high temperature heat conductive oil, the temperature of steam in steam generating system and the generated energy sudden change of steam turbine generator system can not be caused, only that the liquid level of high-temperature buffer oil tank has and changes slowly, even if the conduction oil liquid level in high-temperature buffer oil tank declines more, also can be compensated by the heat release of fused salt heat reservoir, control system has the control that the sufficient time can be calm, not only the thermal efficiency is high, and generated energy good stability.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing solar parabolic through power generation system.
Fig. 2 is the schematic diagram of existing another kind of solar parabolic through power generation system.
Fig. 3 is the schematic diagram of the dual heat-accumulation solar heat generating system of fuse salt of the present utility model and conduction oil.
Fig. 4 is another schematic diagram of the dual heat-accumulation solar heat generating system of fuse salt of the present utility model and conduction oil.
Embodiment
The utility model protects a kind of fuse salt and the dual heat-accumulation solar heat generating system of conduction oil, and as shown in Figure 3, it comprises collecting system 31, fused salt heat reservoir 32, steam generating system 33 and turbine generating system 34.Fused salt heat reservoir 32 is all connected collecting system 31 with steam generating system 33, and fused salt heat reservoir 32 and steam generating system 33 are arranged in parallel, high-temperature buffer oil tank 35 is set between collecting system 31 to steam generating system 32, between this high-temperature buffer oil tank 35 and steam generating system 33, establishes oil pump 36.
Above-mentioned fused salt heat reservoir 32, comprise the salt storage tank 321, conduction oil-fused salt heat exchanging device 323 and the low-temperature molten salt storage tank 322 that are connected successively, collecting system 31 is connected 323 with conduction oil-fuse salt heat exchanger, forms thermal-arrest-heat accumulation loop.
Oil pump 37 and oil expansion tank 38 are established in the loop that conduction oil-fuse salt heat exchanger 323 and steam generating system 33 share, conduction oil-the pipeline of fuse salt heat exchanger 323 before oil expansion tank 38 establishes the first control switch 324, conduction oil-fuse salt heat exchanger 323 is established after another bar pipeline is connected to oil pump 37, this pipeline is established the second control switch 325.
Based on said structure, below the working procedure of fuse salt of the present utility model and the dual heat-accumulation solar heat generating system of conduction oil is described in detail.
As shown in Figure 3, when solar radiation keeps constant level, closed first control switch 324, disconnects the second control switch 324, conduction oil in collecting system 31 absorbs the high temperature heat conductive oil that heat forms 390 DEG C, and a part enters the conduction oil-fuse salt heat exchanger 323 of fused salt heat reservoir 32.Now, 286 DEG C of low-temperature molten salts in low-temperature molten salt pipe 323 and high temperature heat conductive oil carry out exchange heat, and the high-temperature molten salt forming 386 DEG C is stored to high temperature melting salt cellar 321.Temperature through the conduction oil of heat exchange is down to 290 DEG C from 390 DEG C, gets back to collecting system 31 continue to absorb solar heat by the first control switch place, oil expansion tank 38 and oil pump 37, repeats above-mentioned to the process of fused salt heat reservoir heat accumulation.
In above process, high temperature heat conductive oil another part of collecting system 31 enters high-temperature buffer oil tank 35, oil pump 36 runs, after high temperature heat conductive oil in high temperature oil tank enters steam generating system 33, become 290 DEG C of low temperature conduction oils, flow through oil expansion tank 38 and oil pump 37 to get back to collecting system 31 and continue to absorb solar heat, repeat the above-mentioned process that heat is provided to high-temperature buffer oil tank, steam generating system.
As shown in Figure 4, reduce (such as YIDUOYUN is sailed, and covers the sun) in short-term when solar radiation is provisional, cause high-temperature heat-conductive oil yield to reduce.Have the high temperature heat conductive oil of buffer memory in high-temperature buffer oil tank 35, as long as the liquid level of the conduction oil in high-temperature buffer oil tank 35 is enough high, steam turbine power generation amount can not decline, and can steadily generate electricity.If the liquid level of the conduction oil in high-temperature buffer oil tank drops to certain value; now closed second control switch 325; disconnect the first control switch 324; low temperature conduction oil enters fused salt heat reservoir 32; namely the conduction oil flowing through conduction oil-fuse salt heat exchanger changes direction; fused salt now in fused salt heat reservoir 32 is flowed to low-temperature molten salt tank by high-temperature molten salt pipe; thus utilize the heat accumulation release heat of high temperature melting salt cellar; supply the sun to decline the impact caused; although salt melting system becomes heat release state from heat accumulation/outage state, need a period of time.But due to the existence of high-temperature buffer oil tank, during this period of time, the generated energy of steam turbine generator can not change, do not need to lower.
Describe from above-mentioned structure, solar radiation short-time fluctuations can not cause the generated energy of steam turbine generator system to suddenly change, only that the liquid level of high-temperature buffer oil tank has and changes slowly, and this change can be compensated by heat reservoir heat release, control system has the control that the sufficient time can be calm.
Compared to the existing structure of Fig. 1, because the utility model is provided with high-temperature buffer oil tank, by solar thermal collection system and steam turbine generator system decoupling zero, after two system decouplings.Can relatively independently control separately, therefore the control difficulty of whole power plant reduces greatly.This greatly improves the stability of generated energy, greatly reduces the suddenly big or suddenly small wave properties of generated energy.
Compared to the another kind of existing structure of Fig. 2, it is heated into T1 DEG C of water vapour with high-temperature molten salt (386 DEG C) water, and the utility model is that high temperature heat conductive oil (390 DEG C) is directly heated into T2 DEG C of water vapour water.According to heat exchanger end difference principle, under the heat exchanger of same cost, T2>T1, and according to Principles of Steam Turbine, temperature is higher, the thermal efficiency is higher.
Claims (4)
1. a fuse salt and the dual heat-accumulation solar heat generating system of conduction oil, comprise collecting system, fused salt heat reservoir, steam generating system and turbine generating system, turbine generating system is connected with steam generating system, it is characterized in that, described fused salt heat reservoir is all connected collecting system with steam generating system, and fused salt heat reservoir and steam generating system are arranged in parallel, high-temperature buffer oil tank is set between collecting system to steam generating system.
2. fuse salt as claimed in claim 1 and the dual heat-accumulation solar heat generating system of conduction oil, is characterized in that, establish oil pump between described high-temperature buffer oil tank and steam generating system.
3. fuse salt as claimed in claim 2 and the dual heat-accumulation solar heat generating system of conduction oil, it is characterized in that, described fused salt heat reservoir, comprise the salt storage tank, conduction oil-fuse salt heat exchanger and the low-temperature molten salt storage tank that are connected successively, collecting system is connected with conduction oil fuse salt heat exchanger, forms thermal-arrest-heat accumulation loop.
4. fuse salt as claimed in claim 3 and the dual heat-accumulation solar heat generating system of conduction oil, it is characterized in that, oil pump and oil expansion tank are established in the loop that described conduction oil-fuse salt heat exchanger and steam generating system share, conduction oil-the pipeline of fuse salt heat exchanger before oil expansion tank establishes the first control switch, conduction oil-fuse salt heat exchanger establish another bar pipeline be connected to oil pump after and on this pipeline, establish the second control switch.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089340A (en) * | 2016-07-26 | 2016-11-09 | 康达新能源设备股份有限公司 | Groove type solar conduction oil and fused salt mixing heat power generation system |
| CN106438237A (en) * | 2015-08-10 | 2017-02-22 | 中国电力工程顾问集团华北电力设计院有限公司 | Molten salt and conduction oil double heat storage solar thermal power generating system |
| CN106940147A (en) * | 2016-12-30 | 2017-07-11 | 中广核太阳能开发有限公司 | Double tank fused salt heat accumulation quick start systems and quick start method |
| CN109405289A (en) * | 2018-11-30 | 2019-03-01 | 碧海舟（北京）节能环保装备有限公司 | A kind of conduction oil energy storage heat-exchange system and its application method |
| CN109869924A (en) * | 2019-02-26 | 2019-06-11 | 中国华能集团清洁能源技术研究院有限公司 | A kind of solar thermal utilization pilot system and its working method |
-
2015
- 2015-08-10 CN CN201520598165.3U patent/CN204984748U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438237A (en) * | 2015-08-10 | 2017-02-22 | 中国电力工程顾问集团华北电力设计院有限公司 | Molten salt and conduction oil double heat storage solar thermal power generating system |
| CN106089340A (en) * | 2016-07-26 | 2016-11-09 | 康达新能源设备股份有限公司 | Groove type solar conduction oil and fused salt mixing heat power generation system |
| CN106089340B (en) * | 2016-07-26 | 2017-10-24 | 康达新能源设备股份有限公司 | Groove type solar conduction oil and fused salt mixing heat power generation system |
| CN106940147A (en) * | 2016-12-30 | 2017-07-11 | 中广核太阳能开发有限公司 | Double tank fused salt heat accumulation quick start systems and quick start method |
| CN106940147B (en) * | 2016-12-30 | 2020-12-22 | 中广核太阳能开发有限公司 | Double-tank molten salt heat storage quick start system and quick start method |
| CN109405289A (en) * | 2018-11-30 | 2019-03-01 | 碧海舟（北京）节能环保装备有限公司 | A kind of conduction oil energy storage heat-exchange system and its application method |
| CN109869924A (en) * | 2019-02-26 | 2019-06-11 | 中国华能集团清洁能源技术研究院有限公司 | A kind of solar thermal utilization pilot system and its working method |
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