CN102168890A - Loop design for slot type solar heat power plant - Google Patents
Loop design for slot type solar heat power plant Download PDFInfo
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- CN102168890A CN102168890A CN2011100761314A CN201110076131A CN102168890A CN 102168890 A CN102168890 A CN 102168890A CN 2011100761314 A CN2011100761314 A CN 2011100761314A CN 201110076131 A CN201110076131 A CN 201110076131A CN 102168890 A CN102168890 A CN 102168890A
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- heat
- fused salt
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- heat collector
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/50—Energy storage in industry with an added climate change mitigation effect
Abstract
The invention discloses a loop design for a slot type solar heat power plant, and relates to the technical field of slot type solar heat power generation. The loop is arranged in a slot type solar heat collecting field; the heat collecting field is divided into a plurality of heat collector units; one of the heat collector units comprises a parabolic glass surface capable of tracking and concentrating sunlight, and a heat collecting pipe placing on the focus line of the parabolic glass surface, each heat collector unit forms a small dip angle with the ground to lead the relative altitude difference between the two ends of the heat collector unit to not exceed 1m. The loop design is characterized in that: the heat collecting pipes of two neighboring heat collector units are connected; then the highest position or the lowest position of the pipelines of the heat collection pipes are formed at the connected part of two neighboring heat collector units; a molten salt recycling valve is arranged at the lowest position of the pipelines of the heat collection pipes, then the heat collection pipes are connected with a recycled molten salt collecting loop through the valve; and a high-temperature high-pressure nitrogen valve is arranged at the highest position of two neighboring heat collector units. The molten salt in a loop pipeline can be completely conveyed to a big heat storage tank for storage in case of needing; in this way, not only is the heat energy loss due to the falling of temperature at night reduced, but also the pipeline safety is guaranteed.
Description
Technical field
The present invention relates to the trough type solar power generation technical field, specifically be with the heat carrier of fused salt, and designed recovery channel and in needs, fused salt can be recovered to the trough type solar power generation power plant loop design of preserving in the heat storage can as the storage solar heat.
Background technology
In the solar energy thermal-power-generating technology, the slot type system is the most ripe, the most widely used solar energy thermal-power-generating technology of present technology, and the groove type solar thermo-power station mainly comprises: large tracts of land flute profile parabolic condenser, tracking means, heat carrier, steam generator and regular circulation steam power-generating system.The condenser mirror face is made by surface treated sheet metal or thin-film material, the single shaft sun tracing system guarantees accurately to reflex to 80～100 times of sunshines that converge on the heated absorption tube, and the heat carrier that flows in the pipeline is heated to high temperature, the heat carrier of high temperature is transported to a heat exchanger, and there water heating generation steam is driven traditional turbogenerator generating.Traditional slot type thermo-power station utilizes artificial oil to store solar energy as heat carrier, yet oily as the highest temperature that can only be heated to 400 ℃ of heat carrier, and the quality of steam that produces under this temperature is general, has limited the operational efficiency of rear end generating set.In recent years, in some new slot type thermo-power stations, attempting using fused salt as heat carrier, the form of solar energy with heat energy stored, the part in the heat is used for the heat exchange generating, and another part heat is stored with heat storage can.The heat of the fused salt of storage can also realize keeping steam power plant's generating in 24 hours, and this makes this technology aloof outstanding, this means that factory can prolong the service time.Utilize the power plant of fused salt as heat carrier, operating temperature is generally at 290-560 ℃, Billy has improved 2.7 times with artificial oil as the thermal efficiency of heat carrier, in addition, advantage such as that fused salt also has is with low cost, thermal transition efficient height and density High Voltage are little makes its only choosing as heat carrier in the solar generator electricity generation system.
At present, on the direction of utilizing fused salt as heat carrier, face two critical technical problems: first, (with 60% sodium nitrate+40% potassium nitrate is example to fused salt, setting temperature is at 230 ℃) have a higher relatively setting temperature, that is to say, be in flowable liquid state in order to keep fused salt in the whole system return, the temperature of fused salt must be higher than 230 ℃.The problem of bringing like this is exactly, if solar thermal power plants is not all collected fused salt at the night that does not have sunshine and is stored, the fused salt of staying so in the pipeline will be solidified as solid, can lose a large amount of heat energy like this, between next working day, also need to consume same a large amount of heat energy and could melt solid-state fused salt.In addition, because the volume of fused salt increases when solidifying, may cause breaking of pipeline in addition.Therefore, after an end in the daytime, the fused salt in the whole pipe loop all should be transported in the large-scale heat storage can and store, so both reduce the loss of heat energy, guarantee the safety of pipeline again.The second, fused salt has certain corrosivity to pipeline, and especially particularly serious to the corrosion of materials such as rubber in the joint of pipeline and pipeline, this will cause the leakage of pipeline, thereby the safety that influences system is normally moved.Therefore, how scientific and reasonable can design power plant pipeline loop be the another one key that make full use of this heat carrier efficiently of fused salt.
Summary of the invention
The present invention needs the technical solution problem to provide a kind ofly can reduce night because the heat-energy losses that temperature descends and to cause, and guarantees the safety of pipeline again, can also realize the trough type solar power generation power plant loop design of solar plant generating in 24 hours.
The loop design of trough type solar power generation power plant, be arranged in the groove type solar heat collecting field, heat collecting field is divided into several heat collector unit, heat collector unit comprises parabolic minute surface that can tracing collection and is positioned over thermal-collecting tube on the parabolic minute surface focal line, all there is a little inclination angle each heat collector unit with ground, make two ends, heat collector unit relative altitude difference be no more than 1m, it is characterized in that: the thermal-collecting tube of two adjacent heat collector unit is connected, thermal-collecting tube pipeline highest point or lowest part have just been formed in junction, two adjacent heat collector unit, at the lowest part of thermal-collecting tube pipeline a fused salt is installed and is reclaimed valve, link to each other with recovery fused salt collecting loop by valve, a HTHP nitrogen valve is installed at the highest point of adjacent two heat collector unit.
Described fused salt collecting loop is divided into fused salt and collects branch road and fused salt collection main line, and described fused salt is collected branch road one end and linked to each other with the lowest part of two Neighbor Set heat pipes, and the other end connects fused salt and collects the main line, and fused salt is collected the main line and is directly connected to the fused salt heat storage can.
Described fused salt heat storage can is positioned over the lowest part of whole heat collecting field and is positioned at the center of solar plant.
Described fused salt collecting loop adopts the mode of full weldering to connect into as a whole.
Described fused salt is collected the main line and is divided into hot melt salt collection main line and sloppy heat salt collection main line.
Described fused salt heat storage can is a cylinder.
One's duty invention is when the heat collector back when keeping the design electric output power of 50MW (or the shortage of heat of light field heat collector collection on daytime) that quits work at night, open fused salt and reclaim valve, make the fused salt that flows in the whole pipe flow into collecting loop, reclaim, because the fused salt that flows in pipeline is complete effect current downflow at gravity, the speed that flows is slow comparatively speaking, open HTHP nitrogen valve again, high pressure nitrogen enters pipeline, the fused salt that provides a thrust to quicken in the pipeline flows, and makes fused salt to enter heat storage can by collection conduit with accelerating; After the whole collections of the fused salt in the return enter heat storage can, there has not been fused salt in the return, there is no need to keep the temperature of pipeline, allow it cool off naturally and get final product.When will restart whole system, the operation of being done is just in time opposite, to open the nitrogen valve earlier, HTHP nitrogen is injected in the pipeline, pipeline is heated to more than the fused salt setting temperature, again high-temperature molten salt is injected in the whole system loop cyclic process of beginning heat accumulation by the collection conduit system from heat storage can.
Beneficial effect of the present invention: the present invention can all be transported to the fused salt in the return in the large-scale heat storage can in needs and store, so both reduced night because the heat-energy losses that temperature descends and causes, guaranteed the safety of pipeline again, can also realize solar plant generating in 24 hours, simultaneously, avoided fused salt to corrosion that pipeline caused by full welded tube road design.
Description of drawings
Fig. 1 is that the present invention looks down schematic diagram;
Fig. 2 is a side view of the present invention;
Fig. 3 is a front view of the present invention.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
As Fig. 1, Fig. 2, shown in Figure 3, the loop design of a kind of trough type solar power generation power plant, be arranged in the groove type solar heat collecting field, heat collecting field is divided into several heat collector unit, heat collector unit comprises parabolic minute surface that can tracing collection and is positioned over thermal-collecting tube 1 on the parabolic minute surface focal line, all there is a little inclination angle each heat collector unit with ground, this inclination angle can not be excessive, make two ends, heat collector unit relative altitude difference be no more than 1m, the thermal-collecting tube 1 of two adjacent heat collector unit is connected, thermal-collecting tube pipeline highest point or lowest part have just been formed in junction, two adjacent heat collector unit, at the lowest part of thermal-collecting tube pipeline a fused salt is installed and is reclaimed valve 8, reclaim valve 8 by fused salt and link to each other, a HTHP nitrogen valve 7 is installed at the highest point of adjacent two heat collector unit with fused salt collecting loop 2.
Fused salt collecting loop 2 is divided into fused salt and collects branch road 3 and fused salt collection main line 4, fused salt is collected branch road 3 one ends and is linked to each other with the lowest part of two Neighbor Set heat pipes, the other end connects fused salt and collects main line 4, fused salt is collected main line 4 and is directly connected to fused salt heat storage can 9, and fused salt is collected main line 4 and is divided into hot melt salt collection main line 5 and sloppy heat salt collection main line 4.
Fused salt heat storage can 9 is positioned over the lowest part of whole heat collecting field and is positioned at the center of solar plant, is cylindrical structure, can be to guarantee fused salt in gravity effect current downflow, and can make that the duct length of recovery fused salt is short as much as possible.
It is as a whole that fused salt collecting loop 2 adopts the mode of full weldering to connect into, and so just avoided the corrosion of fused salt to pipeline and pipeline junction, guarantees the security of operation of whole system.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. trough type solar power generation power plant loop design, be arranged in the groove type solar heat collecting field, heat collecting field is divided into several heat collector unit, heat collector unit comprises parabolic minute surface that can tracing collection and is positioned over thermal-collecting tube on the parabolic minute surface focal line, all there is a little inclination angle each heat collector unit with ground, make two ends, heat collector unit relative altitude difference be no more than 1m, it is characterized in that: the thermal-collecting tube of two adjacent heat collector unit is connected, thermal-collecting tube pipeline highest point or lowest part have just been formed in junction, two adjacent heat collector unit, at the lowest part of thermal-collecting tube pipeline a fused salt is installed and is reclaimed valve, link to each other with recovery fused salt collecting loop by valve, a HTHP nitrogen valve is installed at the highest point of adjacent two heat collector unit.
2. the loop design of trough type solar power generation according to claim 1 power plant, it is characterized in that: described fused salt collecting loop is divided into fused salt and collects branch road and fused salt collection main line, described fused salt is collected branch road one end and is linked to each other with the lowest part of two Neighbor Set heat pipes, the other end connects fused salt and collects the main line, and fused salt is collected the main line and is directly connected to the fused salt heat storage can.
3. the loop design of trough type solar power generation according to claim 2 power plant, it is characterized in that: described fused salt heat storage can is positioned over the lowest part of whole heat collecting field and is positioned at the center of solar plant.
4. the loop design of trough type solar power generation according to claim 1 power plant is characterized in that: described fused salt collecting loop adopts the mode of full weldering to connect into as a whole.
5. the loop design of trough type solar power generation according to claim 1 power plant is characterized in that: described fused salt is collected the main line and is divided into that hot melt salt is collected the main line and sloppy heat salt is collected the main line.
6. the loop design of trough type solar power generation according to claim 1 power plant, it is characterized in that: described fused salt heat storage can is a cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100761314A CN102168890A (en) | 2011-03-28 | 2011-03-28 | Loop design for slot type solar heat power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100761314A CN102168890A (en) | 2011-03-28 | 2011-03-28 | Loop design for slot type solar heat power plant |
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| CN102168890A true CN102168890A (en) | 2011-08-31 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734929A (en) * | 2012-06-21 | 2012-10-17 | 江苏太阳宝新能源有限公司 | Molten salt heating and discharging system for solar thermal power |
| CN102942233A (en) * | 2012-11-08 | 2013-02-27 | 龚肇康 | Working method for solar system |
| CN104422148A (en) * | 2013-09-04 | 2015-03-18 | 中广核太阳能开发有限公司 | Column-type acceptor for solar tower-type thermal electricity generation and application method thereof |
| CN107166758A (en) * | 2017-06-30 | 2017-09-15 | 天津滨海光热技术研究院有限公司 | Electricity-saving type gravity salt discharge formula photo-thermal and control method |
| CN109442768A (en) * | 2017-08-31 | 2019-03-08 | 甘肃光热发电有限公司 | A kind of electrical heat tracing rotatable interface |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4815444A (en) * | 1986-09-02 | 1989-03-28 | Holland Beecher J | Moderate to moderately high temperature solar liquid heater |
| CN101298944A (en) * | 2008-03-21 | 2008-11-05 | 中国科学院电工研究所 | Passive molten salt thermal absorber |
| CN201666674U (en) * | 2010-04-21 | 2010-12-08 | 东南大学 | Transmeridionally placed heat pipe type compound parabolic heat collector |
-
2011
- 2011-03-28 CN CN2011100761314A patent/CN102168890A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4815444A (en) * | 1986-09-02 | 1989-03-28 | Holland Beecher J | Moderate to moderately high temperature solar liquid heater |
| CN101298944A (en) * | 2008-03-21 | 2008-11-05 | 中国科学院电工研究所 | Passive molten salt thermal absorber |
| CN201666674U (en) * | 2010-04-21 | 2010-12-08 | 东南大学 | Transmeridionally placed heat pipe type compound parabolic heat collector |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734929A (en) * | 2012-06-21 | 2012-10-17 | 江苏太阳宝新能源有限公司 | Molten salt heating and discharging system for solar thermal power |
| CN102734929B (en) * | 2012-06-21 | 2014-10-01 | 江苏太阳宝新能源有限公司 | Molten salt heating and discharging system for solar thermal power |
| CN102942233A (en) * | 2012-11-08 | 2013-02-27 | 龚肇康 | Working method for solar system |
| CN104422148A (en) * | 2013-09-04 | 2015-03-18 | 中广核太阳能开发有限公司 | Column-type acceptor for solar tower-type thermal electricity generation and application method thereof |
| CN107166758A (en) * | 2017-06-30 | 2017-09-15 | 天津滨海光热技术研究院有限公司 | Electricity-saving type gravity salt discharge formula photo-thermal and control method |
| CN109442768A (en) * | 2017-08-31 | 2019-03-08 | 甘肃光热发电有限公司 | A kind of electrical heat tracing rotatable interface |
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Owner name: HANGZHOU ZHONGGUANGCHU NEW ENERGY TECHNOLOGY CO., Free format text: FORMER OWNER: HANGZHOU LIYANG FOCUSED PHOTONICS THERMAL STORAGE TECHNOLOGY CO., LTD. Effective date: 20120626 |
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Free format text: CORRECT: ADDRESS; FROM: 310002 HANGZHOU, ZHEJIANG PROVINCE TO: 311100 HANGZHOU, ZHEJIANG PROVINCE |
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Effective date of registration: 20120626 Address after: 311100, room 5, building 4, 205 Fu He road, Hangzhou, Zhejiang, Binjiang District Applicant after: Hangzhou Zhongguangchu New Energy Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province 310002 Shangcheng District East Block 2 Applicant before: Hangzhou Liyang Juguang Heat Accumulation Technology Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: HANGZHOU LIYANG FOCUSED PHOTONICS THERMAL STORAGE Free format text: FORMER OWNER: HANGZHOU ZHONGGUANGCHU NEW ENERGY TECHNOLOGY CO., LTD. Effective date: 20120817 |
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Free format text: CORRECT: ADDRESS; FROM: 311100 HANGZHOU, ZHEJIANG PROVINCE TO: 310002 HANGZHOU, ZHEJIANG PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20120817 Address after: Hangzhou City, Zhejiang province 310002 Shangcheng District East Block 2 Applicant after: Hangzhou Liyang Juguang Heat Accumulation Technology Co., Ltd. Address before: 311100, room 5, building 4, 205 Fu He road, Hangzhou, Zhejiang, Binjiang District Applicant before: Hangzhou Zhongguangchu New Energy Technology Co., Ltd. |
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Application publication date: 20110831 |