CN103923618B - Quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium and preparation method - Google Patents
Quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium and preparation method Download PDFInfo
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- CN103923618B CN103923618B CN201310040909.5A CN201310040909A CN103923618B CN 103923618 B CN103923618 B CN 103923618B CN 201310040909 A CN201310040909 A CN 201310040909A CN 103923618 B CN103923618 B CN 103923618B
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- 150000003839 salts Chemical class 0.000 title claims abstract description 66
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 58
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910017604 nitric acid Inorganic materials 0.000 title claims abstract description 50
- 239000006004 Quartz sand Substances 0.000 title claims abstract description 49
- 238000012546 transfer Methods 0.000 title claims abstract description 37
- 238000005338 heat storage Methods 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000010248 power generation Methods 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Inorganic materials [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 29
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 21
- NLSCHDZTHVNDCP-UHFFFAOYSA-N caesium nitrate Chemical compound [Cs+].[O-][N+]([O-])=O NLSCHDZTHVNDCP-UHFFFAOYSA-N 0.000 claims description 17
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical group [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 16
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 15
- 235000010333 potassium nitrate Nutrition 0.000 claims description 10
- 239000004323 potassium nitrate Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000009825 accumulation Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 235000010288 sodium nitrite Nutrition 0.000 claims description 7
- 235000010344 sodium nitrate Nutrition 0.000 claims description 6
- 239000004317 sodium nitrate Substances 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000004520 agglutination Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Inorganic materials [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910013558 LiNO3—CsNO3 Inorganic materials 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
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000012430 stability testing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 206010012373 Depressed level of consciousness Diseases 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
- 238000003723 Smelting Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 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
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- -1 conduction oil Chemical class 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Glass Compositions (AREA)
Abstract
Quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium of the present invention and preparation method, belong to solar light-heat power-generation field.Heat transfer heat storage medium of the invention is made of polynary nitric acid molten salt system with quartz sand.The present invention also provides the preparation methods of the heat transfer heat storage medium.Heat transfer heat storage medium of the invention maintains the low melting point of polynary nitric acid fused salt, while improving the maximum working temperature of polynary nitric acid fused salt, up to 700 DEG C.The heat transfer medium it is low in cost, operating temperature range is wide, and thermal stability is good, and heating conduction is high, is highly suitable for solar dynamic power system system, the heat-accumulating heat-transfer system of solar light-heat power-generation.
Description
Technical field
The present invention relates to the heat-accumulating heat-transfer complex medias for solar light-heat power-generation, multiple more particularly to a kind of quartz sand
Close polynary nitric acid Molten Salt Heat Transfer heat storage medium and preparation method.
Background technique
In industrial accumulation of energy and solar light-heat power-generation technology, heat-accumulating heat-transfer medium used at present be mainly free gas and water,
The metals such as conduction oil, fuse salt, sodium and aluminium.Fused salt because have extensive use temperature range, low-steam pressure, low viscosity, well
Stability, many characteristics such as low cost have become the heat transfer heat storage medium that potentiality are had much in solar light-heat power-generation technology, at
To apply more, more mature heat transfer heat storage medium at present.High-temperature fusion salt mainly has nitrate, carbonate, sulfate, fluorine
Compound, chloride, oxide etc..
The raw material sources of nitric acid molten salt system are extensive, cheap, corrosivity is small, therefore compared with other fused salts, nitric acid
Fused salt has very big advantage.Polynary nitric acid fused salt fusing point therein is low, but the upper limit is low using temperature.
Chinese patent application 00111406.9 discloses a kind of LiNO3-KNO3-NaNO3-NaNO2Polynary nitric acid molten salt body
System, operating temperature range are 250 °C -550 °C, and the maximum working temperature of this system is higher than ternary nitric acid salt system, reaches
550 °C, but its lower working temperature is also enhanced, and causes maintenance cost when obnubilation to increase, and LiNO3Addition so that it is rotten
Corrosion increases, and cost increases.
United States Patent (USP) US007588694B1 discloses a kind of LiNO3-KNO3-NaNO3- Ca(NO3)2Polynary nitric acid molten salt body
System, fusing point are lower than 100 °C, and the upper limit uses temperature higher than 500 °C, but LiNO3Addition so that system to hold over system
Corrosivity increases, and industrial cost increases.
The unique molecular chain structure of quartz sand, crystal shape and lattice variations rule, make it have high temperature resistant, it is anti-oxidant,
Many characteristics such as thermal expansion coefficient is small, high-insulation, unique physics, the chemistry such as corrosion-resistant, send out in many high-tech products
Increasingly important role is waved, manufacture glass, refractory material, smelting duriron, flux for metallurgy, ceramic grinding material are often used as
Material, the raw material cast.
So far, it does not see and quartz sand is added in polynary nitric acid fused salt as industrial accumulation of energy and solar energy high temperature
The report of the heat transfer heat storage medium in heat utilization field.
Summary of the invention
The purpose of the present invention is to provide a kind of quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium and preparation method,
The addition of quartz sand improves the maximum working temperature of system, and freezing point (fusing point that DSC Differential Scanning Calorimeter is measured) does not have substantially
It changes, therefore has widened the operating temperature range of polynary nitric acid molten salt system, can be widely used for industrial accumulation of energy and solar energy optical-thermal
Technical field of power generation, and since quartz sand is cheap, so that fused salt production cost is greatly lowered.
To achieve the above object, technical scheme is as follows:
A kind of quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium, it is characterised in that: the heat transfer heat storage medium is
Quartz sand is added in polynary nitric acid molten salt system to be combined.
The polynary nitric acid molten salt system accounts for the 50 ~ 99% of heat transfer heat storage medium total weight, and quartz sand accounts for 1 ~ 50%.
The polynary nitric acid molten salt system accounts for the 50 ~ 90% of heat transfer heat storage medium total weight, and quartz sand accounts for 10 ~ 50%.
The polynary nitric acid molten salt system is KNO3-NaNO3-NaNO2-CsNO3System,
KNO3-NaNO3-NaNO2-Ca(NO3)2System,
KNO3-NaNO3-NaNO2-LiNO3System,
KNO3-NaNO3-CsNO3-Ca(NO3)2System,
KNO3-NaNO3-LiNO3-CsNO3System or KNO3-NaNO3-NaNO2-CsNO3-Ca(NO3)2System.
The KNO3-NaNO3-NaNO2-CsNO3The components by weight percent of system is as follows: 40 parts -80 parts of potassium nitrate, sodium nitrate 5
- 15 parts, 20-50 parts of sodium nitrite, 1 part -10 parts of cesium nitrate of part；
The KNO3-NaNO3-NaNO2-Ca(NO3)2The component of system is as follows: 40 parts -80 parts of potassium nitrate, 5 parts of sodium nitrate -
15 parts,；20 parts -50 parts of sodium nitrite, 1 part -10 parts of calcium nitrate；
The KNO3-NaNO3-NaNO2-LiNO3The component of system is as follows: 40 parts -80 parts of potassium nitrate, 5 part -15 of sodium nitrate
Part, 20 parts -50 parts of sodium nitrite；1 part -10 parts of lithium nitrate；
The KNO3-NaNO3-CsNO3-Ca(NO3)2The component of system is as follows: 40 parts -80 parts of potassium nitrate, 5 parts of sodium nitrate -
15 parts, 20 parts -50 parts of cesium nitrate, 1 part -10 parts of calcium nitrate；
The KNO3-NaNO3-LiNO3-CsNO3The component of system is as follows: 40 parts -80 parts of potassium nitrate, 5 part -15 of sodium nitrate
Part, 20 parts -50 parts of lithium nitrate, 1 part -10 parts of cesium nitrate；
The KNO3-NaNO3-NaNO2-CsNO3-Ca(NO3)2Component it is as follows: 40 parts -80 parts of potassium nitrate, sodium nitrate 5
- 15 parts, 10 parts -50 parts of sodium nitrite, 10 parts -30 parts of cesium nitrate, 10 parts -30 parts of calcium nitrate of part.
Purposes of any of the above-described heat transfer heat storage medium in industrial accumulation of energy or solar light-heat power-generation.
Any of the above-described preparation method for stating heat transfer heat storage medium, its step are as follows:
(1) the polynary nitric acid molten salt system is formed, is put into reaction kettle, heating stirring makes fused salt completely at melting, so
After keep the temperature 0.5-1h,
(2) under stirring condition, quartz sand is distributed in high-temperature fusion salt, continues to stir 1-2h, mixture agglutination shape
State,
(3) cooling, packaging.
The heating stirring makes fused salt melt the phase transition temperature of the temperature polynary nitric acid fused salt of use or more completely
80-120℃。
The present invention selects quartz sand as the composite material of nitric acid fused salt for the first time, and quartz sand is a kind of hard, wear-resisting, chemical
The stable silicate mineral of performance, main component are SiO2, a small amount of impurity component such as Fe is often contained in mineral2O3、Al3O2、
CaO, MgO, NaO etc..About 1723 DEG C of fusing point, about 2230 DEG C of boiling point, there is higher fire resistance.It is adopted for quartz sand of the invention
It is greater than 75% common quartz sand with dioxide-containing silica.It is demonstrated experimentally that quartz sand is added in polynary nitric acid molten salt system
Prepare resulting heat transfer heat storage medium, industrial cost is low, little to hold over system corrosivity, and with former polynary nitric acid molten salt system
Compared to having the following advantages and good effect:
Composite fused salt heat transfer heat storage medium prepared by the present invention had not only had the heat transfer property of nitric acid fused salt, but also improved hot steady
The qualitative and upper limit uses temperature.
Quartz sand is added and does not change the fusing point of former polynary nitric acid molten salt system substantially, but increases latent heat of phase change,
I.e. energy storage density is high, this can reduce the requirement to hold over system size and energy.
The quartz sand that the present invention is added in polynary nitric acid molten salt system, the granularity the thin more is conducive to the conductivity of heat of system
Energy.
In the preferred embodiments of the invention, quartz sand accounts for 1 ~ 50%, and quartz sand content is higher, reduces cost and is more obvious；This
Not only it can guarantee that the ceiling temperature of polynary nitric acid fused salt improved in a range, but also can guarantee that fusing point does not increase.
Specific embodiment
The present invention will be described in detail combined with specific embodiments below.
Experimental material:
Common quartz sand (dioxide-containing silica is greater than 75%), 100 mesh are purchased from Shandong Hong Tai quartz sand factory.
Potassium nitrate, sodium nitrate, sodium nitrite, cesium nitrate, calcium nitrate, lithium nitrate: technical pure grade, general chemical article company
It is commercially available.
Polynary nitrate system formulation such as table 1.
Polynary nitric acid system formula in each embodiment of table 1.
More than 1 ~ 3. yuan of nitric acid salt system KNO of embodiment3-NaNO3-NaNO2-CsNO3Middle addition quartz sand prepares heat-accumulating heat-transfer
Medium
The preparation of step 1. quartz sand composite multi-component nitric acid fused salt product 1 ~ 3:
Prepare the material of the polynary nitric acid molten salt system of composition by formula listed by table 1, quartz is uniformly added in heating stirring afterwards
Sand is continued heating stirring, is removed water with degasification, and heating temperature is above 80-120 °C of fused salt phase transition temperature.
Quartz sand (100 mesh) is distributed in the polynary nitric acid molten salt system of melting, molten mixture 1-2h is stirred, obtains
Quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium.Quartz sand accounts for 1%, 20%, 50% respectively in product 1 ~ 3.
The heat stability testing of step 2. product 1 ~ 3
Heat stability testing is carried out to the heat transfer heat storage medium and the polynary nitric acid fused salt of control that are prepared.
Test is carried out using gravimetric method: 1 ~ 3 resulting 3 kind of fuse salt of embodiment being respectively charged into the crucible of nickel, is put
Enter in temperature controlling stove and heated, tested since room temperature, takes out experiment crucible at regular intervals and weighed with assay balance.
If the weight of sample is no longer reduced in a certain temperature section, then improves the temperature of temperature controlling stove.Then it takes at regular intervals again
Experiment crucible is weighed out, then is further continued for heating up later to another stable state.
As the result is shown:
120 hours are kept the temperature under 600 °C of fused salt of product 1 ~ 3, loss late is less than 1；
30 hours are kept the temperature under 700 °C, the loss late of three products respectively may be about 20%, 3%, 1%.
Control is three kinds of polynary nitric acid system fused salts (the corresponding system of 1 embodiment number of table 1 ~ 3) for not adding quartz sand,
It is about 8% that 30 hourly loss rates can be run under 600 °C, but occurs apparent loss under 700 °C, is run to 30 hours, loss
Rate is up to 25%
Illustrate that quartz sand, which is added, can effectively improve the stability and raising SC service ceiling of nitric acid molten salt system at high temperature
Temperature.
The latent heat of phase change test and fusing point test of step 3. product 1 ~ 3.
(being scanned under normal pressure) is carried out using general Differential Scanning Calorimeter DSC.
Test result shows that compared with the control, latent heat of phase change all significantly increases；The fusing point of product 1,2 is basically unchanged, product
3 fusing point slightly increases.
More than 4 ~ 6 yuan of nitric acid salt system KNO of embodiment3-NaNO3-NaNO2-Ca(NO3)2Middle addition quartz sand preparation accumulation of heat passes
Thermal medium
Prepare the material of the polynary nitric acid molten salt system of composition by formula listed by table 1.
For the preparation method and detection method of product 4 ~ 6 completely with embodiment 1 ~ 3, quartz sand (100 mesh) accounts for 10% respectively,
25%, 40%；Control is free of quartz sand, is the corresponding system of embodiment 4 ~ 6 in table 1.
Thermal stability determination result is similar to embodiment 1 ~ 3, and after keeping the temperature 30 hours under 700 °C, the present invention is prepared
Three kinds of products loss late successively about 10%, 3%, 1%, hence it is evident that lower than the highest 28% of control.
(being scanned under normal pressure) is carried out using general Differential Scanning Calorimeter DSC.Test result shows, and to photograph
Than latent heat of phase change all significantly increases；Fusing point is basically unchanged.
More than 7 ~ 9. yuan of nitric acid salt system KNO of embodiment3-NaNO3-NaNO2-LiNO3Middle addition quartz sand prepares heat-accumulating heat-transfer
Medium
Prepare the material of the polynary nitric acid molten salt system of composition by formula listed by table 1
Preparation method and detection method are completely the same as embodiment 1 ~ 3.
Quartz sand added by embodiment 7 ~ 9 (100 mesh) accounts for 15%, 30%, 45%
Thermal stability determination result is similar to embodiment 1 ~ 3, and after keeping the temperature 30 hours under 700 °C, the present invention is prepared
Three kinds of products loss late highest 12%, 4%, 2%, hence it is evident that lower than the 30% of control.
(being scanned under normal pressure) is carried out using general Differential Scanning Calorimeter DSC.Test result shows, and to photograph
Than the fusing point of product 7 ~ 9 is basically unchanged, and latent heat of phase change is increased.
More than 10 ~ 12. yuan of nitric acid salt system KNO of embodiment3-NaNO3-CsNO3-Ca(NO3)2Middle addition quartz sand prepares accumulation of heat
Heat transfer medium
Completely with embodiment 10 ~ 12, quartz sand (100 mesh) accounts for the preparation method and detection method of product 10 ~ 12 respectively
10%, 25%, 45%；Control is free of quartz sand, is the corresponding system of embodiment 10 ~ 12 in table 1.
Thermal stability determination result and embodiment 7 ~ 9 are closely similar, after keeping the temperature 30 hours under 700 °C, present invention preparation
The loss late highest 12% of three kinds of obtained products, 3%, 2%, hence it is evident that lower than the 30% of control.
(being scanned under normal pressure) is carried out using general Differential Scanning Calorimeter DSC.Test result shows, and to photograph
Than latent heat of phase change is increased, and the fusing point of product 10 ~ 11 is substantially unchanged, and the fusing point of product 12 slightly increases.
Quartz sand is added in the other polynary nitric acid salt systems of embodiment 13 ~ 18 and prepares heat-accumulating heat-transfer medium
The preparation method and detection method of product 13 ~ 18 completely with embodiment 13 ~ 18, every kind of polynary nitric acid molten salt system
Three kinds of matched quartz sand (100 mesh) ratios of formula are respectively as follows: 15%, 25%, 40%；Control is free of quartz sand, is real in table 1
Apply the corresponding system of example 13 ~ 18.
After thermal stability determination is as a result, keep the temperature 30 hours at 700 DEG C, the loss for 6 kinds of products that the present invention is prepared
Rate highest 11%, 2.5%, 1%, hence it is evident that lower than the 30% of control.
(being scanned under normal pressure) is carried out using general Differential Scanning Calorimeter DSC.Test result shows, and to photograph
Than the fusing point of product 13 ~ 18 is basically unchanged, and latent heat of phase change is increased.Above-mentioned experimental result explanation: the present invention is in polynary nitric acid
Quartz sand is added in molten salt system and prepare resulting heat transfer heat storage medium, it is little to hold over system corrosivity, and with the polynary nitre of original
Sour molten salt system is compared and brings the progress of following several respects:
The heat transfer property of existing nitric acid fused salt, but the upper limit for improving polynary nitric acid fused salt uses temperature；Use temperature model
Enclose wider, thermal stability is good.
Latent heat of phase change is big, and energy storage density is high, reduces the requirement to hold over system size and energy, and capacity usage ratio is high,
Energy-saving effect is good.
Molten Salt Heat Transfer heat storage medium heating conduction prepared by the present invention greatly increases, and overcomes nitric acid fused salt heating conduction
The shortcomings that difference, easy hot-spot, can be widely used for solar light-heat power-generation technical field.
Claims (4)
1. a kind of quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium, it is characterised in that: the heat transfer heat storage medium be
Quartz sand is added in polynary nitric acid molten salt system to be combined,
The polynary nitric acid molten salt system accounts for the 50~90% of heat transfer heat storage medium total weight, and quartz sand accounts for 10~50%；
The polynary nitric acid molten salt system are as follows:
KNO3-NaNO3-NaNO2-Ca(NO3)2System,
KNO3-NaNO3-CsNO3-Ca(NO3)2System,
KNO3-NaNO3-NaNO2-CsNO3-Ca(NO3)2System；
The KNO3-NaNO3-NaNO2-Ca(NO3)2The component of system is as follows: 40 parts -80 parts of potassium nitrate, 5 part -15 of sodium nitrate
Part,；20 parts -50 parts of sodium nitrite, 1 part -10 parts of calcium nitrate；
The KNO3-NaNO3-CsNO3-Ca(NO3)2The component of system is as follows: 40 parts -80 parts of potassium nitrate, 5 parts -15 parts of sodium nitrate,
20 parts -50 parts of cesium nitrate, 1 part -10 parts of calcium nitrate；
The KNO3-NaNO3-NaNO2-CsNO3-Ca(NO3)2Component it is as follows: 40 parts -80 parts of potassium nitrate, 5 part -15 of sodium nitrate
Part, 10 parts -50 parts of sodium nitrite, 10 parts -30 parts of cesium nitrate, 10 parts -30 parts of calcium nitrate.
2. purposes of the heat transfer heat storage medium described in claim 1 in industrial accumulation of energy or solar light-heat power-generation.
3. the preparation method for the heat storage medium that conducts heat described in claim 1, its step are as follows:
(1) the polynary nitric acid molten salt system is formed, is put into reaction kettle, heating stirring protects fused salt at melting, then completely
Warm 0.5-1h,
(2) under stirring condition, quartz sand is distributed in high-temperature fusion salt, continue stir 1-2h, mixture agglutination state,
(3) cooling, packaging.
4. preparation method according to claim 3, it is characterised in that: the heating stirring makes fused salt melt use completely
Temperature is above 80-120 DEG C of phase transition temperature of the polynary nitric acid fused salt.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310040909.5A CN103923618B (en) | 2013-02-01 | 2013-02-01 | Quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium and preparation method |
| US14/765,295 US10865335B2 (en) | 2013-02-01 | 2014-01-21 | Quartz sand/graphite composite molten salt heat transfer and heat storage medium and preparation method thereof |
| EP14745627.1A EP2952551B1 (en) | 2013-02-01 | 2014-01-21 | Quartz sand composite molten salt heat transfer and heat storage medium |
| PCT/CN2014/070970 WO2014117663A1 (en) | 2013-02-01 | 2014-01-21 | Quartz sand/graphite composite molten salt heat transfer and heat storage medium and preparation method thereof |
| PT147456271T PT2952551T (en) | 2013-02-01 | 2014-01-21 | Quartz sand/graphite composite molten salt heat transfer and heat storage medium and preparation method thereof |
| ES14745627T ES2848832T3 (en) | 2013-02-01 | 2014-01-21 | Molten salt heat transfer and heat storage medium composed of quartz sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310040909.5A CN103923618B (en) | 2013-02-01 | 2013-02-01 | Quartz sand composite multi-component nitric acid Molten Salt Heat Transfer heat storage medium and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103923618A CN103923618A (en) | 2014-07-16 |
| CN103923618B true CN103923618B (en) | 2019-01-11 |
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| CN104293304B (en) * | 2014-09-18 | 2017-11-24 | 孙希干 | Solar energy heat-storage type vacuum heat-pipe, heat storage phase-changing material and its preparation technology |
| CN104559942B (en) * | 2015-02-03 | 2018-05-29 | 湖北科技学院 | Fused salt mixt heat accumulation heat-transfer matcrial and preparation method thereof |
| CN105226995A (en) * | 2015-10-21 | 2016-01-06 | 成都九十度工业产品设计有限公司 | A kind of solar energy graphene battery |
| CN105400498A (en) * | 2015-10-30 | 2016-03-16 | 百吉瑞（天津）新能源有限公司 | Mixed molten salt heat transfer and storage working medium and application thereof |
| CN107573901A (en) * | 2016-07-05 | 2018-01-12 | 青海爱能森新材料科技有限公司 | A kind of low melting point heat transfer accumulation of heat fused salt, preparation method and applications |
| CN108851193B (en) * | 2018-05-29 | 2021-08-10 | 江苏中烟工业有限责任公司 | Preparation method of heating non-combustible core material |
| CN109777365B (en) * | 2019-01-29 | 2020-10-02 | 云南科威液态金属谷研发有限公司 | Liquid metal composite phase change energy storage material and preparation method and application thereof |
| TWI847307B (en) * | 2021-10-17 | 2024-07-01 | 國立成功大學 | Phase change material for heat exchangers and waste heat recovery system |
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Denomination of invention: Quartz sand composite multi-element nitrate molten salt heat transfer and storage medium and preparation method Granted publication date: 20190111 Pledgee: Huanghe Road Sub branch of Dongying Laishang Rural Bank Co.,Ltd. Pledgor: Shandong ainengsen New Material Technology Co.,Ltd. Registration number: Y2024980027497 |
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