CN103923619A - Molten nano-carbonate heat transfer and accumulation medium, and preparation method and application thereof - Google Patents
Molten nano-carbonate heat transfer and accumulation medium, and preparation method and application thereof Download PDFInfo
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- 238000012546 transfer Methods 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000009825 accumulation Methods 0.000 title claims abstract description 16
- 239000002105 nanoparticle Substances 0.000 claims abstract description 84
- 238000005338 heat storage Methods 0.000 claims abstract description 61
- 238000010248 power generation Methods 0.000 claims abstract description 19
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 7
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 6
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 6
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims description 195
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 92
- 238000000034 method Methods 0.000 claims description 31
- 238000003860 storage Methods 0.000 claims description 29
- 230000004888 barrier function Effects 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 23
- 239000011229 interlayer Substances 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 10
- 230000004927 fusion Effects 0.000 claims description 7
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical group [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 6
- 235000015320 potassium carbonate Nutrition 0.000 claims description 6
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 5
- 239000011780 sodium chloride Substances 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 229910052808 lithium carbonate Inorganic materials 0.000 abstract 1
- 229910000027 potassium carbonate Inorganic materials 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 25
- 239000012071 phase Substances 0.000 description 18
- 230000008859 change Effects 0.000 description 17
- 238000012360 testing method Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000012856 packing Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
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- 241000196324 Embryophyta Species 0.000 description 5
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- 230000007547 defect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000012808 vapor phase Substances 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
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- 230000008901 benefit Effects 0.000 description 3
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- 239000012782 phase change material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
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- WHRZCXAVMTUTDD-UHFFFAOYSA-N 1h-furo[2,3-d]pyrimidin-2-one Chemical compound N1C(=O)N=C2OC=CC2=C1 WHRZCXAVMTUTDD-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000006173 Larrea tridentata Nutrition 0.000 description 1
- 244000073231 Larrea tridentata Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- PNEFIWYZWIQKEK-UHFFFAOYSA-N carbonic acid;lithium Chemical compound [Li].OC(O)=O PNEFIWYZWIQKEK-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 238000000605 extraction Methods 0.000 description 1
- 125000001153 fluoro group Chemical class F* 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 229960001866 silicon dioxide Drugs 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
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Abstract
The invention provides a molten nano-carbonate heat transfer and accumulation medium, and a preparation method and an application thereof, and belongs to the technical field of heat storage and transmission. The molten nano-carbonate heat transfer and accumulation medium contains a molten carbonate system formed by potassium carbonate, sodium carbonate, lithium carbonate and sodium chloride, nanoparticles are added into the molten carbonate system, and the nanoparticles are metal oxide and/or nonmetal oxide; and the nanoparticles are dispersed into the molten carbonate system, and the molten nano-carbonate heat transfer and accumulation medium is formed through compounding. The melting point of molten nano-carbonate is low, so the molten nano-carbonate heat transfer and accumulation medium has an upper limit use temperature of 800DEG C, has a good heat stability and a high heat conductivity, and is very suitable for the heat accumulation and transfer systems of industrial energy accumulation and solar photo-thermal power generation.
Description
Technical field
The invention belongs to heat and store and Transfer Technology field, relate to a kind of heat-accumulating heat-transfer complex media, particularly a kind of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium and preparation method thereof and application.
Background technology
In industrial accumulation of energy and solar light-heat power-generation technology, the heat-accumulating heat-transfer medium using at present mainly contains the metals such as air, water, thermal oil, melting salt, sodium and aluminium.Fused salt is because having use temperature scope widely, low-steam pressure, low viscosity, satisfactory stability, many characteristics such as low cost have become the heat transfer heat storage medium that has much potentiality in solar light-heat power-generation technology, become current application more, comparatively ripe heat transfer heat storage medium.High-temperature fusion salt mainly contains carbonate, nitrate, vitriol, fluorochemical, muriate, oxide compound etc.
It is low, thermally-stabilised good that existing nitric acid fused salt mixed system has fusing point, to container and the advantage such as piping material corrodibility is little, is relatively suitable as solar energy thermal-power-generating heat transfer heat storage medium.Yet there is the less and low shortcoming of thermal conductivity of solution heat in nitric acid molten salt system, at high temperature easily to decompose, its upper limit use temperature is generally no more than 600 ℃, is not suitable for the solar energy high temperature application within the scope of 600～800 ℃.Therefore be necessary the heat transfer heat-storing material that exploitation utilizes for sun power high temperature.Alkaline carbonate fusing point is high, Heat stability is good, upper limit use temperature are high, is the first-selected fused salt material of this temperature range.Yet, the also corresponding raising of its lower limit use temperature, power consumption causes maintenance cost to uprise.Application number is that 200810027638.9 Chinese patent discloses a kind of muriatic carbonic acid molten salt system (Na that added
2cO
3, K
2cO
3, NaCl, KCl), ceiling temperature, up to 800 ℃, can well meet the requirement of solar energy high temperature heat transfer accumulation of heat, more satisfactory, but 567 ℃ of fusing points make lower limit temperature too high, and power consumption insulation causes maintenance cost too high.Chinese patent 200910037348.7 discloses a kind of containing lithium carbonic acid molten salt system (Na
2cO
3, K
2cO
3, NaCl, Li
2cO
3), the safe handling upper temperature limit that the effective maintenance system of the additive sodium chloride adopting and Quilonum Retard is high, and melting point depression to 390 ℃.But in actual applications, such fusing point or higher, easily causes pipe blocking or maintenance cost too high, the fusing point that how effectively to reduce carbonic acid fused salt is the major issue that current solar light-heat power-generation accumulation of heat faces.
Summary of the invention
According to the defect in above-mentioned field and deficiency, the invention provides a kind of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium and preparation method thereof and application, described heat transfer heat storage medium Heat stability is good, and there is higher the safe working temperature upper limit and thermal conductivity, lower fusing point has been widened the operating temperature range of carbonic acid molten salt system greatly, can be widely used in industrial accumulation of energy and solar light-heat power-generation technical field.
A carbonic acid nanometer Molten Salt Heat Transfer heat storage medium, contains by salt of wormwood sodium carbonate, the carbonic acid molten salt system that Quilonum Retard and sodium-chlor form, it is characterized in that, in described carbonic acid molten salt system, add nanoparticle, described nanoparticle is metal oxide and/or nonmetal oxide; Described nanoparticle is distributed to carbonic acid molten salt system, is compounded to form carbonic acid nanometer Molten Salt Heat Transfer heat storage medium.This carbonic acid nanometer Molten Salt Heat Transfer heat storage medium working temperature is wide, and during use, temperature is even, good heat conduction effect.
Described nanoparticle is selected from SiO
2nanoparticle, ZnO nano particle, Al
2o
3nanoparticle, TiO
2one or more in nanoparticle, MgO nanoparticle, CaO nanoparticle.Compare with the carbonic acid Molten Salt Heat Transfer heat storage medium of prior art level, adding of above-mentioned nanoparticle, reduce the volumetric shrinkage of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the present invention, and increased substantially the latent heat of phase change of invention carbonic acid nanometer Molten Salt Heat Transfer heat storage medium.
The median size of described nanoparticle is 10～30nm.When nanoparticle used meets above-mentioned requirements and can guarantee that carbonic acid nanometer Molten Salt Heat Transfer heat storage medium is wider than prior art carbonic acid fused salt use temperature, also guarantee carbonic acid nanometer Molten Salt Heat Transfer heat storage medium good heat conduction effect of the present invention.
Each ingredients weight parts proportioning of described carbonic acid nanometer Molten Salt Heat Transfer heat storage medium is: 30～60 parts, salt of wormwood; 20～50 parts, sodium carbonate; 10～30 parts of Quilonum Retards; 3～10 parts, sodium-chlor; Nanoparticle: 1～5 part.Heat absorption and the heat storage capacity of the carbonic acid nanometer fused salt in this formula range are good, thermal conductivity obviously improves, can steady running at 800 ℃ of temperature, and fusing point is low to moderate 260 ℃, overcome that carbonic acid fused salt heat conductivility is poor, the shortcoming of easy local superheating, can be widely used in solar light-heat power-generation technical field.
The purposes of above-mentioned carbonic acid nanometer Molten Salt Heat Transfer heat storage medium in industrial accumulation of energy or solar light-heat power-generation.
The preparation method of above-mentioned carbonic acid nanometer Molten Salt Heat Transfer heat storage medium, comprises the following steps:
(1) make it become molten state molten salt system heating;
(2) nanoparticle is joined in the molten salt system of melting in proportion, after stirring, insulation, obtains high-temperature fusion salt;
(3) described high-temperature fusion salt is cooling, obtain nanometer Molten Salt Heat Transfer heat storage medium;
Described nanoparticle is selected from SiO
2nanoparticle, ZnO nano particle, Al
2o
3nanoparticle, TiO
2one or more in nanoparticle, MgO nanoparticle, CaO nanoparticle.
Use comprises portable electrical tracing (10), the fused salt tank (2) of solar thermal collection system (9), sandwich (13), comminution by gas stream moisture eliminator (3), warm air generator (4), prilling granulator (5), refrigerating unit (20), whipping appts (11), the device of opening for feed (12);
Described fused salt tank (2), comminution by gas stream moisture eliminator (3), prilling granulator (5), refrigerating unit (20) is connected successively by pipeline; Described warm air generator (4) is connected with described comminution by gas stream moisture eliminator (3) by pipeline; Described portable electrical tracing (10) and described solar thermal collection system (9) are parallel with one another, and by pipeline, connect with described interlayer (13) respectively;
Described whipping appts (11) is located in described fused salt tank (2), and described opening for feed (12) is located at described fused salt tank (2) upper top.
On described solar thermal collection system (9), also draw another pipeline and contact mutually with interlayer (13), this pipeline is provided with high-temperature storage tank (1).
Described warm air generator (4) is heat exchanger, and described interlayer (13), described heat exchanger, described comminution by gas stream moisture eliminator (3) are connected successively by pipeline, and described heat exchanger is also connected with a gas blower (15).
Described device also comprises low-temperature storage tank (18), described heat exchanger and described low-temperature storage tank (18) are in series by pipeline, described low-temperature storage tank (18) is drawn pump III (17) by pipeline, and described pump III (17) is drawn two pipelines and contacted mutually with described solar thermal collection system (9) and described portable electrical tracing (10) respectively; Described pump III (17) and described solar thermal collection system (9), and be respectively equipped with valve between described pump III (17) and described portable electrical tracing (10), for controlling the flow direction of the thermal barrier of described low-temperature storage tank (18).Reduce the fusing point of carbonic acid fused salt, improve thermal conductivity, effective way is preparation composite fused salt, in fused salt, adds metal or the non-metallic particle of high heat conduction.Research discovery, millimeter or micron-sized solid particulate be easy Precipitation in matrix, causes line clogging, affects enhancement of heat transfer effect.And nanoparticle has larger specific surface area, can effectively increase the heat transfer area between body material, improve heat-transfer effect.Meanwhile, the thermal conductivity of nanoparticle is large more than carbonic acid fused salt matrix, has changed the structure of carbonic acid fused salt matrix after adding, and has strengthened the energy transfer process of mixture inside, and thermal conductivity is increased.On the other hand, because the particle diameter of nanoparticle is at nanoscale, be subject to the effect of the power such as Blang's power, this micromotion strengthens the energy transfer process between particle and liquid, increases the thermal conductivity of nano-calcium carbonate fused salt.The present invention adds nanoparticle in carbonic acid molten salt system, and nanoparticle is evenly distributed in carbonic acid fused salt, and under high-temperature liquid-phase state, the nanoparticle in mixed solution is precipitate and separate not.Due to the very large specific surface area of nanoparticle and interfacial effect, greatly increased thermal conductivity and the heat transfer area of carbonic acid nanometer fused salt.The huge capillary force producing by nano-void is adsorbed onto fused salt yardstick and the distribution of controlling hole in matrix, thereby volumetric shrinkage is diminished.The effect of capillary force makes liquid carbonic acid nanometer fused salt be difficult to overflow from micropore, thus the flowability problem while having solved high-temperature molten salt fusing.
Preparation method of the present invention comprises that the heated and stirred of carbonic acid fused salt, degasification dewater, add nanoparticle, gained system and continue heated and stirred, insulation, the operation such as cooling.
Prepare metal oxide nanoparticles and/or nonmetal oxide nanoparticle can adopt Physical, vapor phase process, chemical method.Wherein Physical is physical pulverization method and mechanical ball milling method, and physical pulverization method obtains nanoparticle by methods such as mechanical disintegration, electrical spark blasts, is characterized in simple to operate, cost is low, but product purity is low, and size distribution is inhomogeneous; And employing ball milling method is controlled the nanoparticle that suitable condition obtains pure element, alloy or matrix material, be characterized in simple to operate, cost is low, but product purity is low, size distribution is inhomogeneous.Vapor phase process is material to be formed to gas adsorb cooling forming under certain condition.Chemical method is to form by two or more material chemical reaction under certain temperature, pressure, and by extraction, distillation, dry obtaining.
Carbonic acid nanometer fused salt of the present invention can be widely used in industrial accumulation of energy and solar light-heat power-generation technical field.
Chinese invention patent application 200910074994.0 discloses a kind of fluorine salt-based nano high temperature phase change heat storage composite material, that nano level gold particle, silver particles, copper particle are compound to by a certain percentage in the villiaumite of high-temperature phase-change and are obtained, the heat transfer property that has overcome the existence of villiaumite based phase-change material is poor, thermal conductivity is low, the defect such as while solidifying volumetric shrinkage is large.And the fusing point of carbonic acid molten salt system is higher, use lower limit working temperature higher, easily cause pipe blocking or maintenance cost too high, but the solar energy high temperature application of the high safe handling upper temperature limit of carbonic acid fused salt within the scope of 600～800 ℃ is still very tempting.In prior art, although the safe handling upper temperature limit of carbonic acid fused salt is higher than common nitrate system, its lower limit working temperature is also high simultaneously, causes maintenance cost to increase.Meanwhile, carbonic acid fused salt and villiaumite based phase-change material nature difference are larger, and the defect of existence is also not quite similar, thereby without any solve the report of the defects such as the lower limit use temperature existing in carbonic acid fused salt is high, fusing point is high about how by composite Nano metal particle.
The present invention adds metal oxide and/or the nonmetal oxide nanoparticle that thermal conductivity is high in carbonic acid fused salt, prepare composite phase-change fused salt material, the volumetric shrinkage ratio of composite phase change heat-accumulation material and the fusing point of heat transfer heat storage medium have been reduced, also improved the latent heat of phase change of phase change material simultaneously, improved the conduct heat thermal conductivity of heat storage medium of the present invention, conduct heat in the higher safe handling ceiling temperature of heat storage medium guaranteeing the present invention, reduce its fusing point, the present invention's heat storage medium use temperature of conducting heat is broadened.
The invention solves the technical problem of the lower limit working temperature that current carbonic acid molten salt system is high, greatly widened the operating temperature range of carbonic acid molten salt system, can be widely used in industrial accumulation of energy and solar light-heat power-generation technical field.This heat-transfer medium can overcome carbonic acid fused salt fusing point height and the low shortcoming of thermal conductivity, the defect of local superheating while having avoided carbonic acid fused salt to use.
The latent heat of phase change of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the present invention is large, can, up to 300J/g, compare with not adding the carbonic acid fused salt of nanoparticle, its latent heat of phase change is significantly improved, and energy storage density is high, has reduced the requirement to hold over system size, capacity usage ratio is high, good energy-conserving effect.The formation that this medium can utilize and control hole is with enhancement of heat transfer, and volumetric shrinkage during restriction carbonic acid fused salt solid-liquid phase change, than not adding the volumetric shrinkage of the carbonic acid fused salt of nanoparticle to reduce by 14% left and right.Heat absorption and the heat storage capacity of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the present invention are good, thermal conductivity obviously improves, 800 ℃ of upper limit use temperatures, and fusing point is low to moderate 260 ℃, overcome that carbonic acid nanometer fused salt heat conductivility is poor, the shortcoming of easy local superheating, can be widely used in solar light-heat power-generation technical field.
Prepare carbonic acid nanometer fused salt of the present invention device used as follows:
This device comprises portable electrical tracing (10), the fused salt tank (2) of solar thermal collection system (9), sandwich (13), comminution by gas stream moisture eliminator (3), warm air generator (4), prilling granulator (5), refrigerating unit (20), whipping appts (11), opening for feed (12);
Described fused salt tank (2), comminution by gas stream moisture eliminator (3), prilling granulator (5), refrigerating unit (20) is connected successively by pipeline; Described warm air generator (4) is connected with described comminution by gas stream moisture eliminator (3) by pipeline; Described portable electrical tracing (10) and described solar thermal collection system (9) are in series by pipeline and described interlayer (13) respectively; Portable electrical tracing 10 or solar thermal collection system 9 heat hot carriers and then heating fused salt tank 2 are prepared high-temperature molten salt, prepared high-temperature molten salt flows to from comminution by gas stream moisture eliminator 3 upper ends by pipeline, the warm air that warm air generator 4 produces flows to from the lower end of comminution by gas stream moisture eliminator 3, thereby the object of reach dry, pulverizing high-temperature molten salt, high-temperature molten salt is after drying placed in prilling granulator 5 and carries out granulation, finally by refrigerating unit (20), obtains high-temperature molten salt.
Described whipping appts (11) is located in described fused salt tank (2), this whipping appts 11 is mechanical stirring device, for preparing on a large scale the stirring and evenly mixing of fused salt process, described opening for feed (12) is located at described fused salt tank (2) upper top, so that add each raw material moiety of fused salt from top.
On described solar thermal collection system (9), also draw another pipeline and contact mutually with interlayer (13), this pipeline is provided with high-temperature storage tank (1).Between described solar thermal collection system 9 and described high-temperature storage tank 1, be provided with valve, for controlling the thermal barrier of solar thermal collection system 9, in high-temperature storage tank 1, whether flow; When close between solar thermal collection system 9 and high-temperature storage tank 1 valve time, can prepare high-temperature molten salt by the mode of solar thermal collection system 9 or portable electrical tracing 10 direct heating thermal barrier and then heating fused salt tank 2; When energy abundance or fused salt tank 2 do not need to heat, can open the valve between solar thermal collection system 9 and high-temperature storage tank 1, thermal barrier through solar thermal collection system 9 heating just can and then store by pipeline flow-direction high-temperature storage tank 1, when needs heat, can be drawn into interlayer 13 and then heat fused salt tank 2 and prepare high-temperature molten salt by pump 19.
Described warm air generator (4) is heat exchanger, and described interlayer (13), described heat exchanger and described comminution by gas stream moisture eliminator (3) are connected successively by pipeline, and described heat exchanger is also connected with a gas blower (15).After high-temperature molten salt preparation, thermal barrier in interlayer 13 is by pipeline flow-direction heat exchanger and then for heating the air that enters heat exchanger with gas blower 15 drums, this air after being heated flows into from the below of comminution by gas stream moisture eliminator 3 high-temperature molten salt flowing to from the upper side for dry by pipeline, thereby realize the waste heat recycling of the thermal barrier in interlayer 13, energy-conserving and environment-protective.
This device also comprises low-temperature storage tank (18), described heat exchanger and described low-temperature storage tank (18) are in series by pipeline, described low-temperature storage tank (18) the other end is drawn a pump III (17) by pipeline, and described pump III (17) is drawn two pipelines and contacted mutually with described solar thermal collection system (9) and described portable electrical tracing (10) respectively; Between described pump III (17) and described solar thermal collection system (9) and described pump III (17) and described portable electrical tracing (10), be respectively equipped with valve, for controlling the flow direction of the thermal barrier of described low-temperature storage tank (18).The thermal barrier flowing out from interlayer 13 heated gas blower 15 bloats next air and passed through pipeline flow-direction low-temperature storage tank 18, low-temperature storage tank 18 thermal barrier out can be by being divided into the pipeline of two-way, flow to portable electrical tracing 10, pass through its heating and then prepare high-temperature molten salt for adding the fused salt tank of hot preparation high-temperature molten salt; Can 9 or flow to solar heat-collection system, this flows to the thermal barrier of solar thermal collection system 9 or is stored in high-temperature storage tank so that follow-up for adding hot preparation high-temperature molten salt, or is directly used in and adds hot preparation high-temperature molten salt.This section of design realized the recycle of thermal barrier, reduces costs energy-conserving and environment-protective.
This device also comprises feed bin 6, packing plant 7 and storing device 8; Described feed bin 6, packing plant 7 are connected by pipeline, and described packing plant 7 is in series with storing device 8; By above-mentioned, through prilling granulator 5 granulations and the cooled fused salt of refrigerating unit 20, temporarily deposit in feed bin 6, and then use packing plant 7 to pack, finally use storing unit 8 to store for future use.
Between described fused salt tank 2 and described comminution by gas stream moisture eliminator (3), be provided with pump I 14, between described heat exchanger and described low-temperature storage tank 18, be provided with pump II 16; Between described high-temperature storage tank 1 and described hot interlayer 13, be provided with pump IV 19; Pump I 14 is for being drawn into by pipeline the fused salt of fused salt tank 2 preparations from the top of comminution by gas stream moisture eliminator 3; Pump II 16 is for being drawn into low-temperature storage tank 18 by heat exchanger thermal barrier out by pipeline; Pump IV 19 is for being drawn into interlayer 13 by the high-temperature heat carrier of high-temperature storage tank 1 by pipeline and then heating fused salt tank 2 and prepare fused salt.
Described solar thermal collection system 9 adopts the solar light-heat power-generation mode of slot types, tower, dish formula or linear Fresnel formula.From the preferred slot type of angle of cost and technology maturity and tower, the elected slot type Jing Chang with photo-thermal power generation is as the mode of assembling sun power, by the high-temperature heat carrier direct heating fused salt tank in thermal-collecting tube.Common high-temperature heat carrier is high-temperature molten salt, thermal oil, overheated steam at present, preferred thermal oil in slot type mirror field.The elected tower Jing Chang with photo-thermal power generation is as the mode of assembling sun power, by the high-temperature heat carrier direct heating fused salt tank in heat absorber.Common high-temperature heat carrier is high-temperature molten salt, thermal oil, overheated steam at present, preferred fused salt in tower mirror field.
Between described fused salt tank 2 and described pump I 14, be provided with valve, whether this valve passes through pipeline flow-direction comminution by gas stream moisture eliminator 3 for controlling the high-temperature molten salt of fused salt tank 2; Between described heat exchanger and described interlayer 13, be provided with valve, whether this valve passes through pipeline flow-direction heat exchanger for controlling the thermal barrier of interlayer 13.
Described thermal barrier is high-temperature molten salt, thermal oil, overheated steam.
This device is designed with two heating systems, be respectively solar thermal collection system 9 and portable electrical tracing 10, when sunny, can use solar thermal collection system 9, the high-temperature heat carrier obtaining can part direct heating fused salt tank, part can directly store in addition, the demand to thermal barrier while meeting sun power deficiency.In addition, when solar radiation is not enough, can also use portable electrical tracing 10, assurance equipment is used when solar radiation is not enough, and this preparation facilities takes full advantage of natural energy resources, energy-conserving and environment-protective.
Preparation method of the present invention can select type of heating can select portable electrical tracing or solar energy heating as the case may be.If on-the-spot at materials, such as solar energy thermoelectric power station, can directly use the sun power of gathering, environmental protection and energy saving.In addition, the method also makes full use of the waste heat of thermal barrier in fused salt tank interlayer, makes it by heat exchanger, heat required warm air.In addition, treat that the thermal barrier in heat exchanger has heated air, can flow into low temperature energy storage pipe and then flow to solar thermal collection system by pipeline and change portable electrical tracing, and then be heated, and then prepare high temperature carbonic acid nanometer fused salt for heating fused salt tank, realized the recycle of thermal barrier, reduced costs, energy-conserving and environment-protective.The liquid phase fused salt mixed system obtaining in the inventive method is directly forming the Powdered of uniform drying after comminution by gas stream moisture eliminator, is convenient on the one hand packing and sells.Performance stable homogeneous while being use on the one hand in addition.
Carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the present invention has following advantage and positively effect:
1. Heat stability is good, good heat conductivity, heat absorption, heat storage capacity are good, and thermal conductivity is high, overcomes the shortcoming of the easy local superheating of common carbonic acid fused salt;
2. upper limit use temperature is high, and fusing point is low, and upper limit use temperature is up to 800 ℃, and fusing point is low to moderate 260 ℃, is conducive to reduce insulation energy consumption, prevents that fused salt from condensing in pipeline;
3. lower limit temperature is lower, less demanding to the size of system and energy, and capacity usage ratio is high, good energy-conserving effect;
4. volumetric shrinkage is than little, than not adding the volumetric shrinkage of the carbonic acid fused salt of nanoparticle to reduce by 14% left and right;
5. latent heat of phase change is large, can compare and not add the carbonic acid fused salt latent heat of phase change of nanoparticle to improve a lot up to 300J/g, energy storage density is high, can meet solar energy high temperature thermal utilization, be suitable for very much the heat-accumulating heat-transfer system of solar thermal power power generation system, solar light-heat power-generation.
Accompanying drawing explanation
The structural representation of Fig. 1 the inventive method equipment therefor;
Reference numeral lists as follows: 1-high-temperature storage tank, 2-fused salt tank, 3-comminution by gas stream moisture eliminator, 4-warm air generator, 5-prilling granulator, 6-feed bin, 7-packing plant, 8-storing device, 9-solar thermal collection system, the portable electrical tracing of 10-, 11-whipping appts, 12-opening for feed, 13-interlayer, 14-pump I, 15-gas blower, 16-pump II, 17-pump III, 18-low-temperature storage tank, 19-pump IV, 20-refrigerating unit.
Embodiment
It is in order further to understand better the present invention that following embodiment is provided; be not limited to described preferred forms; content of the present invention and protection domain are not construed as limiting; anyone under enlightenment of the present invention or by the present invention, combines with the feature of other prior aries and any and the present invention of drawing is identical or akin product, within all dropping on protection scope of the present invention.
If do not specialize, the conventional means that in embodiment, technique means used is well known to those skilled in the art.Reagent used in the present invention, if no special instructions, is commercial sources and obtains, or prepare with normal experiment method; Test method used in embodiment, if no special instructions, is normal experiment method well known to those skilled in the art.
The source of institute's use equipment and reagent in the embodiment of the present invention:
Salt of wormwood, sodium carbonate, Quilonum Retard, sodium-chlor, silicon-dioxide, zinc oxide, aluminium sesquioxide, titanium dioxide, magnesium oxide etc. are all technical pure levels, and the approach that is purchased obtains, and generally chemical article company can buy.
Nanoparticle in the present invention can be to be purchased approach to obtain, as long as selected SiO
2nanoparticle, ZnO nano particle, Al
2o
3nanoparticle, TiO
2the median size of nanoparticle, MgO nanoparticle, CaO nanoparticle, within the scope of 10～30nm, just can realize goal of the invention of the present invention.
In addition, the preparation process of nanoparticle only adopts vapor phase process as embodiment, and the nanoparticle that wherein prepared by Physical and chemical method equally also can be realized goal of the invention of the present invention, as long as the median size of selected nanoparticle is within the scope of 10～30nm.
The preparation method of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the present invention is as follows:
1) adopt vapor phase process to prepare metal oxide nanoparticles MgO and/or nonmetal oxide nanoparticle SiO
2(notice that the nanoparticle in this step can adopt the approach that is purchased to obtain, the nanoparticle that is purchased gained can be realized goal of the invention of the present invention equally);
2) by sodium-chlor with Quilonum Retard mixes and add fused salt tank from charging opening, the valve of opening between interlayer and solar thermal collection system makes to interlayer static state, to be heated to the whole meltings of solid in fused salt tank through the heat carrier flow of solar thermal collection system heating, and insulation 10～30min naturally cools to room temperature mechanical disintegration;
Then salt of wormwood and sodium carbonate are joined to fused salt tank, stirring makes to mix, obtain carbonic acid molten salt system, re-using the static heating of thermal barrier fused salt tank degasification through solar thermal collection system heating dewaters and makes it become molten state, Heating temperature is above 50～100 ℃ of left and right of fused salt transformation temperature, insulation 10～30min;
3) step 1) gained nanoparticle is joined to above-mentioned fused salt tank, mechanical stirring molten mixture 0.5～1h, so that it tentatively mixes, 0.5～1h is stirred in insulation again, and it is fully mixed, and obtains high-temperature fusion salt;
4) discharge port of opening fused salt tank pumps into comminution by gas stream moisture eliminator by step 3) carbonic acid fused salt with pump for liquid salts, thermal barrier in fused salt tank is added to warm air by heat exchanger simultaneously and obtain required warm air, then make this warm air from the bottom of comminution by gas stream drying tower, flow into comminution by gas stream moisture eliminator, granulation, cooling uniform and stable carbonic acid nanometer Molten Salt Heat Transfer heat storage medium.
5) step 4) gained carbonic acid nanometer Molten Salt Heat Transfer heat storage medium is put into feed bin, packing, preserves.
It should be noted that: the device that the present embodiment device used is researched and developed voluntarily for contriver, this device is furnished with two cover heating units, comprises portable electrical tracing and solar energy heating, in process of production, can select as the case may be type of heating.Thermal barrier in fused salt tank interlayer can be high temperature heat conductive oil or fused salt or overheated steam; After fused salt in these thermal barrier have heated fused salt tank, make it flow to heat exchanger and carry out heat hot air, can make full use of the waste heat of thermal barrier.
Embodiment 1～25.
Embodiment 1～25 obtains according to above-mentioned preparation method.Table 1 is the particle diameter of nanoparticle in the formula of various embodiments of the present invention and formula, and according to prior art at the formula (X1) of carbonic acid fused salt wherein, application number is that 200910037348.7 Chinese invention patent discloses a kind of lithium-containing molten salt creosote thermal transmission heat storage medium and preparation method thereof, the carbonic acid fused salt (not containing nanoparticle) containing lithium of the formula that X1 records according to its specification sheets embodiment 4 for contriver and preparation method's gained;
The particle diameter of table 1. carbonic acid nanometer fused salt formula and corresponding nanoparticle
Test example 1.X1 and the embodiment of the present invention 1～25 prepared and the performance test of carbonic acid acid nanometer fused salt
(1) heat stability testing:
Test adopts weighting method to carry out: the fused salt sample of need test is joined in different nickel crucible processed, putting into temperature controlling stove heats, with analytical balance, weigh, from normal temperature, start to test, then static state is heated to the whole meltings of solid, naturally cool at set intervals room temperature and take out experiment crucible, with analytical balance, weigh.If in a certain temperature section, the weight of sample no longer reduces, and improves the temperature of temperature controlling stove.Then take out at set intervals experiment crucible and weigh with analytical balance, until continue again after another stable state to heat up.So circulation, until 600 ℃.Record specific holding temperature and soaking time, and calculate specific holding temperature and the corresponding rate of loss of soaking time and surplus ratio.Adopt respectively aforesaid method to test X1 and the embodiment of the present invention 1～25, must table 2 according to test data.
Table 2. fused salt heat stability testing data
As seen from Table 2, X1 is 700 ℃ and following temperature in contrast, and rate of loss is 0, when temperature be raised to 816 ℃ and insulation during 40h rate of loss be 1%, and when temperature be raised to 821 ℃ and while being incubated 35h rate of loss be 7%; By contrast, the embodiment of the present invention is 700 ℃ and following temperature, and rate of loss is 0, when temperature be raised to 816 ℃ and insulation during 40h rate of loss be 1% and following, and when temperature be raised to 821 ℃ and while being incubated 35h rate of loss be 0.8～1.7%.Clearly, the carbonic acid nanometer fused salt of the embodiment of the present invention and X1 carbonic acid fused salt can steady runnings at 800 ℃ of temperature, and the carbonic acid nanometer fused salt thermostability of the embodiment of the present invention is better by contrast, and its surplus ratio in more than 800 ℃ relevant temperature is larger.
(2) fusing point, latent heat of phase change test: adopt general differential scanning instrument (being called for short DSC) sample fused salt to be carried out to minimum temperature of fusion, latent heat of phase change test.Test result is as table 3.Result shows, the fusing point of the carbonic acid nanometer fused salt of the embodiment of the present invention 1～25 preparation is compared melting point depression with latent heat of phase change with the molten salt system of prior art X1, latent heat of phase change improves, therefore when could keep the high upper limit use temperature of this carbonic acid nanometer Molten Salt Heat Transfer heat storage medium, reduce its lower limit use temperature, carbonic acid nanometer Molten Salt Heat Transfer heat storage medium use temperature of the present invention is broadened.
(3) phase transformation volumetric shrinkage test: the method that adopts test volume shrinking percentage conventional in prior art, compare with the carbonic acid fused salt that contrasts X1, the phase transformation volumetric shrinkage of the carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the embodiment of the present invention 1～25 preparation reduces, and thermal conductivity improves.The concrete data that the phase transformation volumetric shrinkage of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium prepared by embodiment of the present invention 1-25 reduces are in Table 3.Wherein volumetric shrinkage decrement is compared with common carbonic acid fused salt X1, and the value that the respective volume of the carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the embodiment of the present invention 1～25 preparation is shunk percentage point is as following table.
The performance test data of table 3. embodiment of the present invention 1～25 and X1
| Nitric acid fused salt numbering | Fusing point (℃) | Latent heat of phase change J/g | Volumetric shrinkage percentile value |
| X1 | 392 | 98 | 0.2 |
| Embodiment 1～5 | 262～230 | 260～296 | 0.07～0.10 |
| Embodiment 6～10 | 265～235 | 250～288 | 0.08～0.11 |
| Embodiment 11～15 | 263～234 | 256～291 | 0.09～0.10 |
| Embodiment 16～20 | 260～230 | 262～290 | 0.08～0.09 |
| Embodiment 21～25 | 261～230 | 263～300 | 0.09～0.11 |
As can be seen from Table 3: compare with X1 Molten Salt Heat Transfer heat storage medium, the carbonic acid nanometer Molten Salt Heat Transfer heat storage medium that the present invention prepares substantially all maintains compared with low melting point temperature, guarantees the low use temperature of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the present invention.Compare with X1 Molten Salt Heat Transfer heat storage medium simultaneously, the latent heat of phase change of the carbonic acid nanometer Molten Salt Heat Transfer heat storage medium that the present invention prepares is all improved largely, this may be to cause owing to having changed the structure of carbonic acid fused salt matrix adding of nanoparticle, larger volumetric shrinkage while simultaneously adding the carbonic acid fused salt of the present invention of nanoparticle yet to limit solid-liquid phase change, volumetric shrinkage does not add the X1 carbonic acid fused salt of nanoparticle to reduce nearly 10 percentage point frequently.Illustrate: the present invention is by adding nanoparticle in the system at common carbonic acid fused salt, volumetric shrinkage while having limited fused salt material phase transformation, reduce the volumetric shrinkage ratio of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium, improved the thermal conductivity of carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the present invention.On the whole, the carbonic acid nanometer Molten Salt Heat Transfer heat storage medium property indices that the embodiment of the present invention 1～25 prepares is more excellent.
In embodiment of the present invention, listed carbonic acid nanometer Molten Salt Heat Transfer heat storage medium is used as the using method of solar light-heat power-generation, can be used as with reference to nitric acid Molten Salt Heat Transfer heat storage medium of the prior art the using method of solar light-heat power-generation.In addition, carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of the present invention can also reduce the equipment that auxiliary heat-preserving equipment, measure and prevention Molten Salt Heat Transfer heat storage medium solidify on the basis of original equipment, reduces the cost of investment of solar light-heat power-generation.
More than describe preferably specific embodiment of the present invention in detail.Should be appreciated that those of ordinary skills just can design according to the present invention make many modifications and variations without paying performing creative labour.Therefore, every those skilled in the art according to design of the present invention on the basis of prior art by the available technical scheme of experiment of logic analysis, reasoning or limited number of time, all should be within the determined protection domain of the claims in the present invention book.
Claims (10)
1. a carbonic acid nanometer Molten Salt Heat Transfer heat storage medium, contains by salt of wormwood sodium carbonate, the carbonic acid molten salt system that Quilonum Retard and sodium-chlor form, it is characterized in that, in described carbonic acid molten salt system, add nanoparticle, described nanoparticle is metal oxide and/or nonmetal oxide; Described nanoparticle is distributed to carbonic acid molten salt system, is compounded to form carbonic acid nanometer Molten Salt Heat Transfer heat storage medium.
2. heat transfer heat storage medium according to claim 1, is characterized in that, described nanoparticle is selected from SiO
2nanoparticle, ZnO nano particle, Al
2o
3nanoparticle, TiO
2one or more in nanoparticle, MgO nanoparticle, CaO nanoparticle.
3. heat transfer heat storage medium according to claim 2, is characterized in that, the median size of described nanoparticle is 10～30nm.
4. heat transfer heat storage medium according to claim 3, is characterized in that, each ingredients weight parts proportioning of described carbonic acid nanometer Molten Salt Heat Transfer heat storage medium is: 30～60 parts, salt of wormwood; 20～50 parts, sodium carbonate; 10～30 parts of Quilonum Retards; 3～10 parts, sodium-chlor; Nanoparticle: 1～5 part.
5. the purposes of the arbitrary described carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of claim 1～4 in industrial accumulation of energy or solar light-heat power-generation.
6. the preparation method of the arbitrary described carbonic acid nanometer Molten Salt Heat Transfer heat storage medium of claim 1～4, comprises the following steps:
(1) make it become molten state molten salt system heating;
(2) nanoparticle is joined in the molten salt system of melting in proportion, after stirring, insulation, obtains high-temperature fusion salt;
(3) described high-temperature fusion salt is cooling, obtain nanometer Molten Salt Heat Transfer heat storage medium;
Described nanoparticle is selected from SiO
2nanoparticle, ZnO nano particle, Al
2o
3nanoparticle, TiO
2one or more in nanoparticle, MgO nanoparticle, CaO nanoparticle.
7. method according to claim 6, it is characterized in that, use comprises portable electrical tracing (10), the fused salt tank (2) of solar thermal collection system (9), sandwich (13), comminution by gas stream moisture eliminator (3), warm air generator (4), prilling granulator (5-1), refrigerating unit (20), whipping appts (11), the device of opening for feed (12);
Described fused salt tank (2), comminution by gas stream moisture eliminator (3), prilling granulator (5-1), refrigerating unit (20) are connected successively by pipeline; Described warm air generator (4) is connected with described comminution by gas stream moisture eliminator (3) by pipeline; Described portable electrical tracing (10) and described solar thermal collection system (9) are parallel with one another, and by pipeline, connect with described interlayer (13) respectively;
Described whipping appts (11) is located in described fused salt tank (2), and described opening for feed (12) is located at described fused salt tank (2) upper top.
8. method according to claim 7, is characterized in that, also draws another pipeline and contact mutually with interlayer (13) on described solar thermal collection system (9), and this pipeline is provided with high-temperature storage tank (1).
9. method according to claim 8, it is characterized in that, described warm air generator (4) is heat exchanger, and described interlayer (13), described heat exchanger, described comminution by gas stream moisture eliminator (3) are connected successively by pipeline, and described heat exchanger is also connected with a gas blower (15).
10. method according to claim 9, it is characterized in that, described device also comprises low-temperature storage tank (18), described heat exchanger and described low-temperature storage tank (18) are in series by pipeline, described low-temperature storage tank (18) is drawn pump III (17) by pipeline, and described pump III (17) is drawn two pipelines and contacted mutually with described solar thermal collection system (9) and described portable electrical tracing (10) respectively; Described pump III (17) and described solar thermal collection system (9), and be respectively equipped with valve between described pump III (17) and described portable electrical tracing (10), for controlling the flow direction of the thermal barrier of described low-temperature storage tank (18).
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| CN201310731910.2A CN103923619B (en) | 2013-12-26 | 2013-12-26 | Molten nano-carbonate heat transfer and accumulation medium, and preparation method and application thereof |
| EP14742973.2A EP2949722B1 (en) | 2013-01-25 | 2014-01-21 | Nanometer molten salt heat-transfer and heat-storage medium, preparation method and use thereof |
| US14/762,938 US10351748B2 (en) | 2013-01-25 | 2014-01-21 | Nanometer molten salt heat-transfer and heat-storage medium, preparation method and use thereof |
| PT147429732T PT2949722T (en) | 2013-01-25 | 2014-01-21 | Nanometer molten salt heat-transfer and heat-storage medium, preparation method and use thereof |
| ES14742973T ES2884173T3 (en) | 2013-01-25 | 2014-01-21 | Nano molten salt heat transfer and heat storage medium, method of preparation and use of the same |
| PCT/CN2014/070967 WO2014114220A1 (en) | 2013-01-25 | 2014-01-21 | Nanometer molten salt heat-transfer and heat-storage medium, preparation method and use thereof |
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