CN104776615B - Direct endothermic solar heat collector based on Opticai Concentrating System With Secondary Reflection - Google Patents
Direct endothermic solar heat collector based on Opticai Concentrating System With Secondary Reflection Download PDFInfo
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- CN104776615B CN104776615B CN201510192918.5A CN201510192918A CN104776615B CN 104776615 B CN104776615 B CN 104776615B CN 201510192918 A CN201510192918 A CN 201510192918A CN 104776615 B CN104776615 B CN 104776615B
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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
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- 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
Abstract
The present invention relates to a kind of direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection, including top round platform, heat absorption cavity, high-temperature molten salt surge tank and low-temperature molten salt storage tank, multizone division board is had in described top round platform cavity, high-temperature molten salt outlet device is arranged at round platform medial wall, top and bottom, graphite accumulation of heat post, top round platform lateral part is had to be provided with fused salt steam filtration device and high temperature air circulating device mutual UNICOM in high-temperature molten salt surge tank；Strengthening heat absorption and heat-exchanger rig it is provided with in described heat-absorbing chamber body, it is with outward heat-insulation layer, supporting construction is had outside heat-insulation layer, flow distribution baffle is arranged at bottom, low-temperature molten salt lower chambers it is provided with below flow distribution baffle, and be connected with low-temperature molten salt storage tank by low-temperature molten salt inlet pipeline, there is graphite accumulation of heat post in low-temperature molten salt storage tank.The present invention not only has highly endothermic efficiency, and heat-transfer working medium outlet temperature controllable precise, normal pressure runs, and simple to operate, the ecological environment to surrounding has no adverse effects.
Description
[technical field]
The present invention relates to a kind of solar energy heat collector, particularly relate to based on a kind of based on Opticai Concentrating System With Secondary Reflection straight
Connect endothermic solar heat collector.
[background technology]
Fossil energy is as the main energy sources of modern industry, through the large scale mining that century more than one is lasting, its reserves
Day by day reduce, and when the use of fossil energy also brings the most serious environmental problem, such as greenhouse effect and large area long
Between air pollution.Develop reproducible clean energy resource significant for energy sustainable development.Solar energy is as one
Plant new cleaning fuel and be hopeful very much the important component part of the energy based on future.
Mainly there are photovoltaic and two kinds of energy reformulationses of photo-thermal in large solar power station, and wherein light thermo-power station can be divided into again
Tower, slot type and dish-style three kinds.Having power using fused salt as the tower solar-thermal generating system of heat transfer medium big, efficiency is high,
The advantages such as heat storage capacity is strong, stable.Typical tower type solar heat extractor is that the cylindrical being placed in tower top exposes tubular type
Heat extractor, on the one hand, owing to incident can flow the axially distributed uneven corrosivity with fused salt working medium, be operated in continuously non-surely
Cylindrical under the hot environment of state exposes tubular type heat extractor and is easy to overheating fault, causes the broken of heat extractor structure
Bad；On the other hand, the fusing point of fused salt own is higher, and when cloud block operating mode and temperature are too low, endothermic tube is also easy to occur that frozen block is existing
As.Under solar power tower normal operation, high-lift pump for liquid salts need to be used, pump for liquid salts is delivered to the heat extractor of tower top
On, needing to expend the field electricity consumption of about 10%, operation cost is higher.
Use secondary reflection technology, heat sink can be placed in ground, use tradition working medium directly to absorb solar radiation
Technology, can improve safety and economy, and have the higher thermal efficiency.United States Patent (USP) US20110067398A1 proposes one
It is placed in solar focusing and the energy-storage system on ground, including heliostat, heliostat, slope, cylindrical cavity heat extractor, heat extractor is installed
Top blind flange, sunray incidence window and thermal baffle, its heliostat is installed on the slope with certain angle, cylindrical cavity
Fused salt in shape heat extractor directly absorbs the solar radiation that heliostat focuses on；Its by mechanical elevating be positioned within molten salt pool exhausted
Hot dividing plate realizes the regulation of endothermic process, and the pipeline of importing and exporting of cold and hot fused salt is positioned at the certain position of cylindrical cavity heat extractor sidepiece.
This apparatus structure is simple, has the function of heat absorption heat accumulation integration, but device volume is big, and fused salt useful load is big, Flow-rate adjustment
And Temperature of Working controls function and is relatively short of.United States Patent (USP) WO2010083285 proposes the based on secondary reflection of a kind of integration
Solar energy directly absorbs and heat-storing device, including fused salt storage tank, fused salt, fused salt storage tank opening, secondary reflection device, heat exchanger tube and
Agitator, fused salt is only used as heat absorption and heat accumulation working medium, utilizes heat exchanger tube to be derived by the heat in large-scale fused salt storage tank, and heat exchanger tube soaks
Not in heat absorption working medium, in storage tank, temperature of molten salt can not accurately control, it is impossible to directly exports hot melt salt as heat-transfer working medium.
Secondary reflection solar energy hot spot is characterized as that central area energy-flux density is big, and marginal area energy-flux density is little, solar energy
Stream is concentrated mainly on spot center region, and the design of heat extractor should be taken into account Flow and heat flux cooperative effect, accurately controls work
Matter outlet temperature, improves heat absorption efficiency, and prevents local overheated, and prior art is difficult to reach this kind of technique effect.It addition, fused salt
Under high temperature, vapour pressure is relatively low, but in the most open heat extractor, its evaporation capacity is the most considerable, be unfavorable for environmental conservation and
Running safety, above two heat sink does not the most solve this problem.As a kind of clean energy resource, solar energy thermo-power station is steady
Fixed operation needs stable heat-transfer working medium outlet temperature and the friendly to environment, it is proposed that the stream of a kind of heat-transfer working medium
Amount, temperature are accurately controlled and environmentally friendly solar energy heat absorbing device is real needs.
[summary of the invention]
It is an object of the invention to: for defect and the deficiency of prior art, it is provided that a kind of safe and reliable, high efficiency, ring
Based on Opticai Concentrating System With Secondary Reflection the direct endothermic solar heat collector of border friendly, this device not only has heat absorption effect
Rate is high, and heat-transfer working medium outlet temperature controllable precise, and normal pressure runs, simple to operate, to the ecological environment of surrounding without bad shadow
Ring.
For achieving the above object, the technical solution used in the present invention is:
A kind of direct endothermic solar heat collector based on Opticai Concentrating System With Secondary Reflection of the present invention, this device
Built-in liquid heat exchange working medium, this device includes top round platform, heat absorption cavity, high-temperature molten salt surge tank and low-temperature molten salt storage tank, institute
Multizone division board, round platform medial wall, top and bottom is had to have high-temperature molten salt outlet device, high temperature in the top round platform cavity stated
Fused salt outlet device is connected with high-temperature molten salt surge tank by high-temperature molten salt outlet conduit, has graphite to store in high-temperature molten salt surge tank
Plume, on the round platform of top, plane is provided with annular tongue, and there is windbreak in the outside of upper plane, has deflection plate inside windbreak, on
On portion's round platform, there is rhone planar outboard and windbreak junction, have quartz window, outward at the round platform cavity upper opening of top
Sidepiece is provided with fused salt steam filtration device and high temperature air circulating device mutual UNICOM, sucks height by corresponding inhalation spray head
Temperature circulation air and ejection shower nozzle ejection high temperature circulation air；Strengthening heat absorption and heat-exchanger rig it is provided with in described heat-absorbing chamber body,
It is with outward heat-insulation layer, outside heat-insulation layer, has supporting construction, heat absorption cavity top to have heat-insulating cover, bottom to have flow distribution baffle, flow to divide
It is provided with low-temperature molten salt lower chambers below matching board, and is connected with low-temperature molten salt storage tank by low-temperature molten salt inlet pipeline, low-temperature molten salt
Graphite accumulation of heat post is had in surge tank.
In the present invention: described heat absorption cavity is made up of round platform cavity and lower curved face cavity, the feature of curved surface cavity is bent
Line is circle, and oval or hyperbola, this kind of structure can make fluid central region flow velocity increase, and meets Opticai Concentrating System With Secondary Reflection hot spot
Heat absorption Working fluid flow feature required by flux-density distribution feature, the solar energy energy-flux density that heat absorption cavity accepts simultaneously is
500kW/～200kW/.
In the present invention: described liquid heat exchange working medium is fused salt, the use temperature range of fused salt is 300 DEG C～1000
℃。
In the present invention: described low-temperature molten salt lower chambers is provided with lower chambers low-temperature molten salt import, and is entered by low-temperature molten salt
Mouth pipeline is connected with low-temperature molten salt storage tank, low-temperature molten salt inlet pipeline divides and has fused salt emptying pipeline and low-temperature molten salt storage tank phase
Even, fused salt emptying pipeline is provided with fused salt exhaust-valve；Wherein, low-temperature molten salt inlet pipeline is provided with low-temperature molten salt inlet pipeline and cuts
Stop the low-temperature molten salt submerged pump at valve and low-temperature molten salt outlet, in low-temperature molten salt storage tank, have graphite accumulation of heat post.
In the present invention: described high-temperature molten salt surge tank passes through high-temperature molten salt outlet conduit and high-temperature molten salt outlet device phase
Even, high-temperature molten salt outlet conduit is provided with high-temperature molten salt rate of discharge regulation valve, in order to regulate the flow of high-temperature molten salt outlet, high
Temperature molten salt enters high-temperature molten salt surge tank through high-temperature molten salt outlet conduit, has graphite accumulation of heat post, pass through in high-temperature molten salt surge tank
High-temperature molten salt in high-temperature molten salt surge tank is delivered to large high-temperature fused salt storage tank or heat power equipment by high-temperature molten salt circulating pump, its
In, high-temperature molten salt rate of discharge regulation valve is high-temperature solenoid valve.
In the present invention: described multizone division board is made up of, wherein round platform intracavity division board and central area division board
Having on the division board of central area and run through fluid duct and duct opening and closing device, the distributed fluid duct of running through of wall can maximum limit
Reducing due to the fluctuation of the fused salt liquid level caused that flows of degree, reduces reflection loss.
In the present invention: described strengthening heat absorption and heat-exchanger rig include fin and stainless steel component, and fin is fixed on stainless
On steel beam column, wherein said fin includes three fin structures and four fin structures, is made up of graphite or silicon carbide ceramics, fin
Length 10cm～30cm.
In the present invention: what described flow distribution baffle included non-uniform Distribution on circular slab and circular slab runs through fluid bore
Road, wherein circular slab thickness is 3cm～10cm, and centered by running through the distribution characteristics in fluid duct, duct, region is intensive, marginal zone
Duct, territory is sparse, and the central area flow that this structure can enable flow through flow distribution baffle is big, and marginal area flow is little, in enhancing
The flow in heart region and flowing velocity, meet the heat absorption Working fluid flow required by secondary condensation system hot spot energy-flux density feature special
Levy.
In the present invention: described heat-insulating cover is telescopic scrolling curtain, cover materials is that resistant to elevated temperatures basalt fibre is compiled
Knitting material, its inwall scribbles aluminium oxide or zirconium oxide high emissivity coating, and heat-insulating cover can be according to the fluctuation of solar energy intensity of flow
With weather conditions automatic shutter, the internal diameter of heat-insulating cover is than the external diameter big 2～4cm of the annular tongue in plane on the round platform of top.
After using said structure, present invention have the beneficial effect that
1. the present invention is based on secondary reflection Salar light-gathering technology, and fused salt directly absorbs solar radiation, heat in heat extractor
Efficiency is high and does not use traditional endothermic tube, is not susceptible to fused salt frozen block and local hot stall, has higher safety；
2. the heat absorption cavity in the present invention uses the structure that round platform cavity is combined with lower curved face chamber, according to secondary reflection light
The structure design of speckle energy-flux density feature, decreases the useful load of fused salt, improves the heat sink response speed to controlling, it is possible to
Prevent fused salt from flow process occurring in heat extractor the eddy region that local is bigger, it is ensured that fused salt has higher in heat extractor
Heat absorption efficiency；
3. the strengthening heat absorption in the heat-absorbing chamber body in the present invention and the graphite of heat-exchanger rig or silicon carbide ceramics fin, it is right
The absorbance of solar radiation is the highest, it is possible to strengthen the assimilation effect of solar radiation, due to the frictional resistance of heat absorbing fins Yu fused salt,
It also can strengthen the stability of fused salt flowing, is unlikely to make the fused salt in heat-absorbing chamber body larger fluctuation occur under some conditions,
Reduce solar energy reflection loss；
4. the flow distribution baffle in the present invention, its design combines the spy of the hot spot energy-flux density of Opticai Concentrating System With Secondary Reflection
Levy, it runs through the distribution characteristics in fluid duct and makes in heat-absorbing chamber body that central area fused salt flow velocity is high, flow is big, office can be prevented
Territory fused salt is overheated；
5. the quartz window in the present invention, can reduce the heat convection loss of heat absorption cavity, in conjunction with fused salt in the present invention
Steam filtration device and high temperature air circulating device can make fused salt steam not to environmental emission, improve the environment friend of heat collector
Good property and processing safety；
6. the windbreak in the present invention, in conjunction with the deflection plate arranged on it, it is possible to decrease the ambient wind velocity shadow to heat sink
Ring, reduce heat convection loss；
7. the multizone division board in the present invention, is multiple region by top round platform region segmentation, runs through in conjunction with thereon
Fluid duct, opening and closing device and hot melt salt outlet device, can improve the controllability of high-temperature molten salt outlet temperature；
8. the heat-insulating cover in the present invention, it is possible to decrease solar energy heat collector is at night and shuts down the heat loss under operating mode,
Can prevent rainwater from solar energy heat collector being adversely affected during rainy day Guan Bi；
9. there is graphite accumulation of heat post in the high-temperature molten salt surge tank in the present invention and low-temperature molten salt storage tank, the storage of tank body can be improved
Heat energy power and prevent thermal stratification.
[accompanying drawing explanation]
Accompanying drawing described herein is used to provide a further understanding of the present invention, constitutes the part of the application, but
It is not intended that inappropriate limitation of the present invention, in the accompanying drawings:
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the multizone partition plate structure schematic diagram in the present invention；
Fig. 3 is the strengthening heat absorption in the present invention and heat-exchanger rig structural representation；
Fig. 4 is the structural representation strengthening the fin in heat absorption and heat-exchanger rig in the present invention；
Fig. 5 is the plan structure schematic diagram of flow distribution baffle in the present invention；
Fig. 6 be in the present invention flow distribution baffle cut open schematic diagram；
Fig. 7 is the schematic layout pattern of deflection plate in the present invention；
Fig. 8 is ejection shower nozzle and the inhalation spray head layout schematic diagram of fused salt steam filtration device in the present invention；
Fig. 9 is heat absorption cavity structural representation in the present invention；
Figure 10 is the Opticai Concentrating System With Secondary Reflection structural representation in the present invention；
Figure 11 is the system schematic of further embodiment scheme of the present invention.
In figure: 1. top round platform；2. round platform cavity；3. lower curved face cavity；4. strengthening heat absorption and heat-exchanger rig；5. multi-region
Domain separation plate；6. high-temperature molten salt outlet device；7. heat-insulation layer；8. supporting construction；9. windbreak；10. deflection plate；11. quartz glass
Glass window；12. fused salt steam filtration devices；13. high temperature air circulating device；14. ejection shower nozzles；15. inhalation spray heads；16. is adiabatic
Lid；17. annular tongues；18. rhones；19. flow distribution baffles；20. low-temperature molten salt lower chambers；21. lower chambers low-temperature molten salts
Import；22. low-temperature molten salt inlet pipelines；23. low-temperature molten salt inlet pipeline stop valves；24. low-temperature molten salt submerged pumps；25.
Low-temperature molten salt storage tank；26. fused salt exhaust-valves；27. fused salt emptying pipelines；28. low-temperature molten salt circulating pumps；29. high-temperature molten salt outlets
Flow control valve；30. high-temperature molten salt outlet conduits；31. high-temperature molten salt surge tanks；32. high-temperature molten salt circulating pumps；33. graphite
Accumulation of heat post；101. secondary reflection pylons；102. heliostat；103. secondary reflection mirrors；104. heat collector；401. circular slab；
402. run through fluid duct；501. fin；502. stainless steel component；601. round platform intracavity division boards；602. central area isolation
Plate；603. duct opening and closing devices；604. run through fluid duct；605. round platform chamber central regions；606. round platform cavity lateral zones
Territory.
[detailed description of the invention]
The present invention is described in detail, illustrative examples therein and saying below in conjunction with accompanying drawing and specific embodiment
Bright being only used for explains the present invention, but not as a limitation of the invention.
As shown in figs 1-9, a kind of direct endothermic solar heat collector based on Opticai Concentrating System With Secondary Reflection, including on
Portion's round platform 1, heat absorption cavity, high-temperature molten salt surge tank 31 and low-temperature molten salt storage tank 25, have multi-region in described top round platform 1 cavity
Domain separation plate 5, top round platform 1 medial wall and bottom have high-temperature molten salt outlet device 6, high-temperature molten salt outlet device 6 to pass through high temperature
Fused salt outlet conduit 30 is connected with high-temperature molten salt surge tank 31, and on top round platform 1, plane is provided with annular tongue 17, upper plane
There is windbreak 9 in outside, and its height is 2m～5m, has deflection plate 10, planar outboard and Radix Saposhnikoviae on top round platform 1 inside windbreak 9
There is rhone 18 wall 9 junction, has quartz window 11 at top round platform 1 cavity upper opening, and its sunlight transmittance is 90%
～93%, lateral part is provided with fused salt steam filtration device 12 and high temperature air circulating device 13 mutual UNICOM, by corresponding suction
Enter shower nozzle 15 suck high temperature circulation air and ejection shower nozzle 14 spray high temperature circulation air；It is provided with strengthening in described heat-absorbing chamber body
Heat absorption and heat-exchanger rig 4, be with outward heat-insulation layer 7, has supporting construction 8, heat absorption cavity top to have heat-insulating cover 16, the end outside heat-insulation layer 7
There is flow distribution baffle 19 in portion, is provided with low-temperature molten salt lower chambers 20 below flow distribution baffle 19, and by low-temperature molten salt inlet pipeline
22 are connected with low-temperature molten salt storage tank 25.Described heat absorption cavity includes that round platform cavity 2 and lower curved face cavity 3 are constituted, curved surface cavity
Characteristic curve be circle, oval or hyperbola, this kind of structure can make fluid central region flow velocity increase, and meets secondary reflection concentrating
Heat absorption Working fluid flow feature required by system hot spot flux-density distribution feature, the solar energy that heat absorption cavity accepts simultaneously can flow
Density is 500kW/～200kW/；Described low-temperature molten salt lower chambers 20 is provided with lower chambers low-temperature molten salt import 21, and passes through
Low-temperature molten salt inlet pipeline 22 is connected with low-temperature molten salt storage tank 25, low-temperature molten salt inlet pipeline 22 divides and has fused salt to empty pipeline 27
It is connected with low-temperature molten salt storage tank 25, in low-temperature molten salt storage tank 25, has graphite accumulation of heat post 33, fused salt emptying pipeline 27 to be provided with fused salt
Exhaust-valve 26；Wherein low-temperature molten salt inlet pipeline 22 is provided with low-temperature molten salt inlet pipeline stop valve 23 and low-temperature molten salt storage tank 25
The low-temperature molten salt submerged pump 24 in exit；Described high-temperature molten salt surge tank 31 is by high-temperature molten salt outlet conduit 30 and high-temperature molten salt
Outlet device 6 is connected, and high-temperature molten salt outlet conduit 30 is provided with high-temperature molten salt rate of discharge regulation valve 29, in order to regulate high temperature melting
The flow of salt outlet, high-temperature molten salt enters high-temperature molten salt surge tank 31, high-temperature molten salt surge tank through high-temperature molten salt outlet conduit 30
In 31 have graphite accumulation of heat post 33, by high-temperature molten salt circulating pump 32, high-temperature molten salt is delivered to large high-temperature fused salt storage tank or heating power
Equipment, wherein, high-temperature molten salt rate of discharge regulation valve is high-temperature solenoid valve；Described multizone division board 5 is isolated by round platform intracavity
Plate 601 and central area division board 602 are constituted, and wherein have on central area division board 602 and run through fluid duct 604 and duct is opened
Closing device 603, wall is distributed to be run through fluid duct 604 and can reduce the fused salt liquid level that causes due to flowing to greatest extent
Fluctuation, reduces reflection loss；Described strengthening heat absorption and heat-exchanger rig 4 include fin 501 and stainless steel component 502, and fin 501 is solid
Being scheduled on stainless steel component 502, wherein said fin 501 includes three fin structures and four fin structures, by graphite or carbonization
Silicon pottery is constituted, fin 501 length 10cm～30cm；Described flow distribution baffle 19 includes on circular slab 401 and circular slab 401 non-
Equally distributed fluid duct 402 of running through, wherein circular slab 401 thickness is 3cm～10cm, runs through the distribution in fluid duct 402
Being characterized as that duct, central area is intensive, marginal area duct is sparse, and this structure can enable flow through the center of flow distribution baffle
Territory flow is big, and marginal area flow is little, strengthens flow and the flowing velocity of central area, and meeting secondary condensation system hot spot can flow
Heat absorption Working fluid flow feature required by density feature；Described heat-insulating cover 16 includes telescopic scrolling curtain lid, cover materials
For resistant to elevated temperatures basalt fibre braided material, its inwall scribbles aluminium oxide or zirconium oxide high emissivity coating, and heat-insulating cover can
Fluctuation according to solar energy intensity of flow and weather conditions automatic shutter, the internal diameter of heat-insulating cover is than the annulus in plane on the round platform of top
The external diameter big 2～4cm of shape tongue.Described deflection plate 10 is arranged in windbreak 9 inwall and is parallel to horizontal plane in radiation, folding
Stream a length of 0.2m～0.5m of plate 10, from top round platform 1 plane computations, deflection plate 10 length be sequentially reduced from high to low 5cm～
8cm；The heat-insulation layer 7 of described heat-absorbing chamber external body is to have the calcium silicates of certain structural strength or aluminium oxide or magnalium radiation absolutely
Hot material, has the strength support component of steelframe or concrete support to support outside heat-insulation layer 7；Described liquid heat exchange work
Matter is fused salt, and the use temperature range of fused salt is 300 DEG C～1000 DEG C.
Operationally, via low-temperature molten salt circulating pump 28, low-temperature molten salt is delivered in low-temperature molten salt storage tank 25, this example
Middle low-temperature molten salt temperature is 300 DEG C～350 DEG C；After the liquid level of low-temperature molten salt storage tank 25 reach a certain height, open low temperature and melt
Salt submerged pump 24, low-temperature molten salt enters low-temperature molten salt lower chambers 20 through low-temperature molten salt inlet pipeline 22, by low-temperature molten salt submerged pump
24 pressure heads provided drive low-temperature molten salt to enter in lower curved face cavity 3 after flow distribution baffle 19；Low-temperature molten salt is in bottom
Liquid level in curved surface cavity 3 is gradually increasing, and opens Opticai Concentrating System With Secondary Reflection when arriving certain liquid level, low-temperature molten salt under
Flow up in curved surface chamber, portion 3 and pass through directly absorb solar energy and carry with the heat convection strengthening heat absorption and heat-exchanger rig 4
High-temperature；Pressure head that low-temperature molten salt submerged pump 24 is provided drives fused salt to rise in round platform cavity 2, arrive as in Fig. 1 just
Often at operating fluid level position 33, the fused salt through heating becomes high-temperature molten salt, and the temperature of high-temperature molten salt is 500 DEG C～650 DEG C,
High-temperature molten salt enters round platform cavity lateral region 606 by the fluid duct 604 of running through on multizone division board 5, passes through high temperature
Fused salt outlet device 6 enters high-temperature molten salt outlet conduit 30, is wherein provided with high-temperature molten salt on high-temperature molten salt outlet conduit 30 and goes out
Mouth flow control valve 29, in order to regulate high-temperature molten salt rate of discharge；High-temperature molten salt enters high temperature through high-temperature molten salt outlet conduit 30
Fused salt surge tank 31, delivers to large high-temperature fused salt storage tank or heat power equipment through high-temperature molten salt circulating pump 32.
When carrying out the filled process of fused salt in heat-absorbing chamber body, close high-temperature molten salt outlet device 6, close duct opening and closing dress
Put 603, after relatively high level is set up in round platform chamber central region 605, close low-temperature molten salt submerged pump 24, open secondary condensation system
System, fully increases temperature fused salt, during fused salt to predetermined temperature, opens duct opening and closing device 603, and the fused salt after heating enters round platform chamber
Body lateral region 606, opens low-temperature molten salt submerged pump 24, opens high-temperature molten salt outlet device 6, enter after being increased to predetermined fluid level
Normally work operating mode；Under accidental conditions, by regulation high-temperature molten salt rate of discharge regulation valve 29 and low-temperature molten salt submerged pump
24 rotating speeds, coordinated signals high-temperature molten salt flow and outlet temperature；During because needing to close heat collector under maintenance or specific operation, first
First close duct opening and closing device 603, central area, round platform chamber 605 is isolated with round platform cavity lateral region 606, round platform chamber
Body lateral region 606 high-temperature molten salt continues on through hot melt salt outlet device 6 and derives to high-temperature molten salt surge tank 31, closes low-temperature molten salt
Inlet pipeline stop valve 23, opens fused salt exhaust-valve 26, and in heat-absorbing chamber body, fused salt is completely exhausted out to low-temperature molten salt storage tank 25.
Opticai Concentrating System With Secondary Reflection as shown in Figure 10 is by secondary reflection pylon 101, heliostat 102, secondary reflection mirror 103
Forming with heat collector 104, the sunray after heliostat 102 and secondary reflection mirror 103 optically focused and horizontal plane angle are 70
～90 °, the sunray after optically focused enters to inject heat collector 104, the working medium in heating heat collector 104, the liquid in this example
Body heat-exchange working medium uses the Molten Binary Salts that potassium nitrate mixes, district centered by the beam pattern of Opticai Concentrating System With Secondary Reflection with sodium nitrate
Territory energy-flux density is big, and marginal area energy-flux density is little, a diameter of secondary reflection of upper opening in the most above-mentioned round platform chamber, top 1
1.1～1.2 times of condenser system spot diameter, the spilling ratio of hot spot is 0.85～0.95, its receive solar incident ray with
Top round platform 1 horizontal plane angle is 70～90 °, and top round platform 1 height is 0.2～0.4 times of whole heat-absorbing chamber height.Hot spot
Overflow the ratio than the light spot energy light spot energy total with Opticai Concentrating System With Secondary Reflection for arriving heat absorption working medium.
Above-mentioned lower curved face cavity 3 upper diameter is equal to top round platform 1 lower openings diameter, lower curved face cavity 3
Characteristic curve is circle, oval or hyperbola, and lower curved face cavity 3 height is 0.6～0.8 times of whole heat absorption cavity.At this
Secondary reflection mirror in bright is the equipment that the sunlight that heliostat reflects carries out secondary convergence, and it is shaped as hyperboloid；Secondary
Reflecting condensation its feature of system hot spot is approximately circular, and central area energy-flux density is high, and marginal area energy-flux density is low.
As shown in figure 11, further embodiment includes the direct-type of Opticai Concentrating System With Secondary Reflection of five cover die massing
Solar energy heat collector 901,902,903,904,905 and fused salt transfer pipeline 908, and large high-temperature fused salt storage tank 906 He
Heat power equipment 907.When the system is operated, when one of them or the high-temperature molten salt outlet temperature of several heat collector of 901-905
When reaching predetermined temperature, by fused salt transfer pipeline 908, the high-temperature molten salt in the high-temperature molten salt surge tank 31 shown in Fig. 1 is carried
To large high-temperature fused salt storage tank 906, provide thermal source for heat power equipment 907.Modular system can improve safety in operation, single
Module can independent regulation and do not affect the duty of other modules, when wherein certain module occurs abnormal, whole system can
Rely on the high-temperature molten salt in the high-temperature molten salt and large high-temperature fused salt storage tank 906 that other modules export to work on, reduce
The operation risk of solar energy thermo-power station, improves the economy in power station.
The above is only the better embodiment of the present invention, thus all according to the structure described in present patent application scope,
The equivalence that feature and principle are done changes or modifies, in the range of being all included in present patent application.
Claims (8)
1. a direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection, this device built-in liquid heat exchange working medium,
It is characterized in that: include top round platform, heat absorption cavity, high-temperature molten salt surge tank and low-temperature molten salt storage tank, described top round platform
Multizone division board, round platform medial wall, top and bottom is had to have high-temperature molten salt outlet device, high-temperature molten salt outlet device in cavity
It is connected with high-temperature molten salt surge tank by high-temperature molten salt outlet conduit, in high-temperature molten salt surge tank, has graphite accumulation of heat post, top circle
On platform, plane is provided with annular tongue, and there is windbreak in the outside of upper plane, has deflection plate, plane on the round platform of top inside windbreak
There is rhone outside and windbreak junction, have quartz window, lateral part to be provided with fused salt at the round platform cavity upper opening of top
Steam filtration device and high temperature air circulating device mutually UNICOM, by corresponding inhalation spray head suck high temperature circulation air and
Ejection shower nozzle ejection high temperature circulation air；It is provided with strengthening heat absorption and heat-exchanger rig in described heat-absorbing chamber body, is with outward heat-insulation layer,
Supporting construction, heat absorption cavity top is had to have heat-insulating cover, bottom to have flow distribution baffle, be provided with low below flow distribution baffle outside heat-insulation layer
Temperature molten salt lower chambers, and be connected with low-temperature molten salt storage tank by low-temperature molten salt inlet pipeline, there is graphite to store in low-temperature molten salt storage tank
Plume；
Described heat absorption cavity is made up of round platform cavity and lower curved face cavity, and the characteristic curve of curved surface cavity is circle, oval or double
Curve, this kind of structure can make fluid central region flow velocity increase, and meets Opticai Concentrating System With Secondary Reflection hot spot flux-density distribution special
Levying required heat absorption Working fluid flow feature, the solar energy energy-flux density that heat absorption cavity accepts simultaneously is 500kW/～200kW/
㎡。
Direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection the most according to claim 1, its feature exists
In: described liquid heat exchange working medium is fused salt, and the use temperature range of fused salt is 300 DEG C～1000 DEG C.
Direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection the most according to claim 1, its feature exists
In: described low-temperature molten salt lower chambers is provided with lower chambers low-temperature molten salt import, and by low-temperature molten salt inlet pipeline and low-temperature molten salt
Storage tank is connected, and low-temperature molten salt inlet pipeline divides and has fused salt emptying pipeline to be connected with low-temperature molten salt storage tank, on fused salt emptying pipeline
It is provided with fused salt exhaust-valve；Wherein, low-temperature molten salt inlet pipeline is provided with low-temperature molten salt inlet pipeline stop valve and low-temperature molten salt storage
The low-temperature molten salt submerged pump in tank exit, has graphite accumulation of heat post in low-temperature molten salt storage tank.
Direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection the most according to claim 1, its feature exists
In: described high-temperature molten salt surge tank is connected with high-temperature molten salt outlet device by high-temperature molten salt outlet conduit, and high-temperature molten salt exports
Pipeline is provided with high-temperature molten salt rate of discharge regulation valve, and in order to regulate the rate of discharge of high-temperature molten salt, high-temperature molten salt is through high temperature melting
Salt outlet conduit enters high-temperature molten salt surge tank, has graphite accumulation of heat post, by high-temperature molten salt circulating pump in high-temperature molten salt surge tank
High-temperature molten salt in high-temperature molten salt surge tank is delivered to large high-temperature fused salt storage tank or heat power equipment；Wherein, high-temperature molten salt goes out
Mouth flow control valve is high-temperature solenoid valve.
Direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection the most according to claim 1, its feature exists
In: described multizone division board is made up of round platform intracavity division board and central area division board, wherein on the division board of central area
Having and run through fluid duct and duct opening and closing device, the distributed fluid duct of running through of wall can be reduced to greatest extent due to flowing
The fluctuation of the fused salt liquid level caused, reduces reflection loss.
Direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection the most according to claim 1, its feature exists
In: described strengthening heat absorption and heat-exchanger rig include fin and stainless steel component, and fin is fixed on stainless steel component, wherein said
Fin include three fin structures and four fin structures, be made up of graphite or silicon carbide ceramics, finned length 10cm～30cm.
Direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection the most according to claim 1, its feature exists
Fluid duct, wherein circular slab thickness is run through in what: described flow distribution baffle included non-uniform Distribution on circular slab and circular slab
For 3cm～10cm, centered by running through the distribution characteristics in fluid duct, duct, region is intensive, and marginal area duct is sparse, this structure
The central area flow that can enable flow through flow distribution baffle is big, and marginal area flow is little, strengthens flow and the stream of central area
Dynamic speed, meets the heat absorption Working fluid flow feature required by secondary condensation system hot spot energy-flux density feature.
Direct-type solar energy heat collector based on Opticai Concentrating System With Secondary Reflection the most according to claim 1, its feature exists
In: described heat-insulating cover is telescopic scrolling curtain, and cover materials is resistant to elevated temperatures basalt fibre braided material, and its inwall scribbles
Aluminium oxide or zirconium oxide high emissivity coating, heat-insulating cover can be opened automatically according to the fluctuation of solar energy intensity of flow and weather conditions
Closing, the internal diameter of heat-insulating cover is than the external diameter big 2～4cm of the annular tongue in plane on the round platform of top.
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| CN105605805B (en) * | 2016-02-26 | 2017-09-26 | 沈阳建筑大学 | A kind of light heat generator of utilization solar energy |
| CN106907866A (en) * | 2017-03-16 | 2017-06-30 | 百吉瑞（天津）新能源有限公司 | Effectively reduce the device of tower type solar heat dump thermal radiation loss |
| CN108007247B (en) * | 2018-01-17 | 2023-06-23 | 东方电气集团东方锅炉股份有限公司 | External heating type molten salt heat storage system |
| CN108679864B (en) * | 2018-06-10 | 2023-10-03 | 上海晶电新能源有限公司 | Combined molten salt heat absorber for large-scale secondary reflection condensing system |
| CN110647174B (en) * | 2018-06-27 | 2024-03-08 | 沈平 | Vertical and horizontal integrated double-shaft speed reduction transmission system based on friction transmission |
| CN109899999A (en) * | 2019-03-15 | 2019-06-18 | 东方电气集团东方锅炉股份有限公司 | A kind of fused salt heat dump import surge tank with filter device |
| CN114061998B (en) * | 2021-11-10 | 2022-08-19 | 西安交通大学 | High-temperature photo-thermal circulation simulation experiment platform and method for binary chloride |
| CN114933279B (en) * | 2022-06-14 | 2023-07-25 | 中南大学 | Control method for hydrogen production by alcohol fuel pyrolysis |
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| US4474171A (en) * | 1982-03-25 | 1984-10-02 | Caproon Douglas M | Solar energy system with static heat-storage device |
| US7263992B2 (en) * | 2005-02-10 | 2007-09-04 | Yaoming Zhang | Volumetric solar receiver |
| CN102792022B (en) * | 2009-09-18 | 2016-02-24 | 麻省理工学院 | The solar-electricity Force system assembled |
| CN102155806A (en) * | 2011-03-28 | 2011-08-17 | 杭州立扬聚光蓄热科技有限公司 | Salt-melting heat-storing warehouse |
| CN102367994B (en) * | 2011-10-19 | 2012-10-03 | 中国科学院电工研究所 | Fuse salt jet impinging heat dump |
| CN103629827B (en) * | 2013-12-11 | 2017-01-18 | 青海大学 | Large-capacity well type solar heat collection-storage device |
| CN104359234B (en) * | 2014-11-10 | 2016-05-11 | 东方电气集团东方锅炉股份有限公司 | For the fused salt heat absorber system in the tower photo-thermal of secondary reflection power station |
| CN204574546U (en) * | 2015-04-22 | 2015-08-19 | 上海晶电新能源有限公司 | Based on the direct endothermic solar heat collector of Opticai Concentrating System With Secondary Reflection |
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