CN102304350B - Preparation method of high temperature heat storage material for solar photo-thermal power generation - Google Patents
Preparation method of high temperature heat storage material for solar photo-thermal power generation Download PDFInfo
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- CN102304350B CN102304350B CN 201110192712 CN201110192712A CN102304350B CN 102304350 B CN102304350 B CN 102304350B CN 201110192712 CN201110192712 CN 201110192712 CN 201110192712 A CN201110192712 A CN 201110192712A CN 102304350 B CN102304350 B CN 102304350B
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Abstract
The invention discloses a preparation method of a high temperature heat storage material for solar photo-thermal power generation, which comprises the following steps of: with polyaluminum chloride as a main raw material, heating and stirring to dissolve out fused salt and form a precursor of the heat storage material, drying, roasting and cooling to obtain the heat storage material. The latent heat of phase change of the material is 35.5-80.7 J.g-1; and the phase-transition temperature range of the material is 492-797 DEG C. The preparation method of the heat storage material is characterized by simple process, simple and easy available raw materials, in-situ preparation and the like and provides the candidate heat storage material with industrial application potential for the solar photo-thermal power generation.
Description
Technical field
The present invention relates to a kind of solar light-heat power-generation preparation method of high-temperature heat-storage material.
Background technology
Along with global energy crisis, low-carbon (LC) society obtains the promotion of countries in the world, and renewable energy source and energy-saving and emission-reduction become the focus of social concerns.A lot of engineering Application Areass need to store heat, it are discharged when needed again, and heat-storage technology seems extremely important like this.Heat-storage technology is applied to solar light-heat power-generation, and tower and its temperature of butterfly solar light-heat power-generation is 400～800 ℃, therefore needs high energy storage density, resistant to elevated temperatures heat accumulating.Melting salt/ceramic base composite phase-change heat-storage material has that latent heat is large, the heat accumulation temperature is high, is chosen as the heat accumulating of solar energy thermal-power-generating heat reservoir.It is to be composited by multi-microporous ceramic matrix and the phase-changing energy storage material (inorganic salt) that is distributed in the matrix microporous network, do not flow out owing to being retained in the matrix after the fusing of capillary tension effect inorganic salt, can utilize simultaneously the sensible heat of ceramic based material and the latent heat of phase change of inorganic salt in the use procedure, and its use temperature changes with compound Inorganic Salts is different, and scope is generally 450～1100 ℃.Usually the ceramic base that adopts has: MgO, SiC, Al
2O
3Deng, the melting salt of employing has an alkali metal salt, carbonate, vitriol etc.The preparation method is main: (1) mixed-sintering method: by mix a certain proportion of inorganic salt (being phase change material PCM) and additive in ceramic batch, then through overmolding, high temperature sintering, PCM remains in the ceramic matrix and occupies certain space, has the network cell texture so that ceramic matrix sinters into.Shortcoming: melting salt runs off and evaporates serious; (2) melting method of impregnation: this technique is prepared first the porous ceramic matrices suitable of connected network structure on request, the inorganic salt fusing is infiltrated in the ceramic matrix again.Shortcoming: technique is complicated, cost is high, and inorganic salt content is limited.From the solar light-heat power-generation development course as can be known, the business-like bottleneck of solar energy thermal-power-generating is cost at present, and the key that reduces cost is heat reservoir, so the low cost preparation of high-energy-density, high temperature resistant heat accumulating becomes the focus that countries in the world fall over each other to study.
Summary of the invention
Technical problem to be solved by this invention provides that a kind of prepared heat accumulating has high-energy-density, chemical stability is good and cost is low, technique is simple, raw material be simple and easy to solar light-heat power-generation with the preparation method of high-temperature heat-storage material.
In order to solve the problems of the technologies described above, solar light-heat power-generation provided by the invention take polymerize aluminum chloride as main raw material, adopts following steps with the preparation method of high-temperature heat-storage material:
(1) melting salt is separated out: with polymerize aluminum chloride heating and stir, separate out from system to melting salt;
(2) the heat accumulating precursor forms: after melting salt was separated out, the increasing stirring velocity reduced Heating temperature, to whole system gel, stopped to stir and cooling formation precursor;
(3) drying: precursor is put into 90～110 ℃ of drying 1～3h of baking oven;
(4) roasting: at 600～800 ℃ of roasting 1～3h, cooling is heat accumulating with dried precursor.
Melting salt is separated out in the above-mentioned steps (1): the Heating temperature of polymerize aluminum chloride is 70～80 ℃, and stirring velocity is 50～60rpm.
The heat accumulating precursor forms in the above-mentioned steps (2): strengthen stirring velocity to 100～110rpm, reduce Heating temperature to 45～55 ℃.
Described polymerize aluminum chloride is take kaolin as raw material, and one or more in employing calcium oxide, grey calcium powder, sodium hydroxide, the yellow soda ash are the preparation of basicity conditioning agent, Al in the polymerize aluminum chloride
2O
3Content is 11.19%～13.09%, and basicity is 43.20～80.00.
Adopt the solar light-heat power-generation of technique scheme with the preparation method of high-temperature heat-storage material, take the polymerize aluminum chloride of kaolin preparation as main raw material, low-cost preparation melting salt/ceramic base heat accumulating; Adopt the polymerize aluminum chloride of kaolin preparation, it is Al
13(a kind of polymeric species of aluminium) and CaCl
2, NaCl (a kind of or mix) colloidal dispersion, this system has the basic raw material of preparation melting salt/ceramic base composite phase-change heat-storage material: Al element and CaCl
2, NaCl (a kind of or mix), therefore realized that kaolin in-situ prepares melting salt/ceramic base thermal energy storage material, improved the kaolin added value, provide the candidate who possesses the industrial application potentiality heat accumulating for solar light-heat power-generation simultaneously; The latent heat of phase change of material is 35.5～80.7Jg
-1, the transformation temperature scope is 492～797 ℃.
Embodiment
The following examples are only in order to further specify the present invention, rather than restriction the present invention.The present invention can implement by described any mode of summary of the invention.
Embodiment 1:
Get polymerize aluminum chloride (Al
2O
3Content is 11.19%, and basicity is 43.20) 100mL, heated and stirred to melting salt is separated out, and its Heating temperature is that 80 ℃, stirring velocity are 55rpm.The raising stirring intensity adjusts the temperature to 55 ℃ to 100rpm, continues to be stirred to gel to occur, stops to stir and cooling, forms the heat accumulating precursor.After precursor placed 90 ℃ of dry 3h of baking oven, at 600 ℃ of roasting 3h, cooling was heat accumulating.Adopting the latent heat of phase change of SDT Q600 simultaneous thermal analysis instrument test material is 35.5Jg
-1, transformation temperature is 491.9 ℃ and 538.7 ℃.
Embodiment 2:
Get polymerize aluminum chloride (Al
2O
3Content is 11.59%, and basicity is 45.20) 100mL, heated and stirred to melting salt is separated out, and its Heating temperature is that 75 ℃, stirring velocity are 60rpm.The raising stirring intensity adjusts the temperature to 50 ℃ to 105rpm, continues to be stirred to gel to occur, stops to stir and cooling, forms the heat accumulating precursor.After precursor placed 100 ℃ of dry 2h of baking oven, at 700 ℃ of roasting 2h, cooling was heat accumulating.Adopting the latent heat of phase change of SDT Q600 simultaneous thermal analysis instrument test material is 49.1Jg
-1, transformation temperature is 492.8 ℃ and 534.5 ℃.
Embodiment 3:
Get polymerize aluminum chloride (Al
2O
3Content is 13.09%, and basicity is 80.00) 100mL, heated and stirred to melting salt is separated out, and its Heating temperature is that 70 ℃, stirring velocity are 50r pm.The raising stirring intensity adjusts the temperature to 45 ℃ to 100rpm, continues to be stirred to gel to occur, stops to stir and cooling, forms the heat accumulating precursor.After precursor placed 110 ℃ of dry 1h of baking oven, at 800 ℃ of roasting 1h, cooling was heat accumulating.Adopting the latent heat of phase change of SDT Q600 simultaneous thermal analysis instrument test material is 80.7Jg
-1, transformation temperature is 797.3 ℃.
Claims (3)
1. a solar light-heat power-generation take polymerize aluminum chloride as main raw material, is characterized in that: adopt following steps with the preparation method of high-temperature heat-storage material:
(1) melting salt is separated out: with polymerize aluminum chloride heating and stirring, from system, separate out to melting salt, described polymerize aluminum chloride is take kaolin as raw material, and one or more in employing calcium oxide, grey calcium powder, sodium hydroxide, the yellow soda ash are the preparation of basicity conditioning agent, Al in the polymerize aluminum chloride
2O
3Content is 11.19%～13.09%, and basicity is 43.20～80.00;
(2) the heat accumulating presoma forms: after melting salt was separated out, the increasing stirring velocity reduced Heating temperature, to whole system gel, stopped to stir and cooling formation presoma;
(3) drying: presoma is put into 90～110 ℃ of drying 1～3h of baking oven;
(4) roasting: at 600～800 ℃ of roasting 1～3h, cooling is heat accumulating with dried presoma.
2. solar light-heat power-generation according to claim 1 is with the preparation method of high-temperature heat-storage material, and it is characterized in that: melting salt is separated out in the above-mentioned steps (1): the Heating temperature of polymerize aluminum chloride is 70～80 ℃, and stirring velocity is 50～60rpm.
3. solar light-heat power-generation according to claim 1 and 2 is with the preparation method of high-temperature heat-storage material, it is characterized in that: the heat accumulating presoma forms in the above-mentioned steps (2): strengthen stirring velocity to 100～110rpm, reduce Heating temperature to 45～55 ℃.
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| CN 201110192712 CN102304350B (en) | 2011-07-11 | 2011-07-11 | Preparation method of high temperature heat storage material for solar photo-thermal power generation |
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| CN 201110192712 CN102304350B (en) | 2011-07-11 | 2011-07-11 | Preparation method of high temperature heat storage material for solar photo-thermal power generation |
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| CN102304350A CN102304350A (en) | 2012-01-04 |
| CN102304350B true CN102304350B (en) | 2013-03-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106010467B (en) * | 2016-05-31 | 2019-10-08 | 南京达峰合金有限公司 | Conductive molten material for solar energy metallurgical melting pot |
| CN109575962B (en) * | 2018-12-12 | 2023-11-14 | 河南理工大学 | Biomass pyrolysis liquefying device based on solar heat supply |
| CN112520772A (en) * | 2020-12-23 | 2021-03-19 | 四川科龙达环保股份有限公司 | Method for producing high-purity colorless transparent polyaluminum chloride by using aluminum ash |
| CN113136174A (en) * | 2021-04-21 | 2021-07-20 | 贵州国锐鑫节能科技有限公司 | Solar inorganic energy storage material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125672A (en) * | 2007-08-24 | 2008-02-20 | 中国科学院地质与地球物理研究所 | Method for preparing polymeric aluminum chloride by using kaolinite ore |
| CN101649185A (en) * | 2009-09-02 | 2010-02-17 | 中南大学 | Heat storage material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57210296A (en) * | 1981-06-19 | 1982-12-23 | Toshiba Corp | Heat accumulation material for heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125672A (en) * | 2007-08-24 | 2008-02-20 | 中国科学院地质与地球物理研究所 | Method for preparing polymeric aluminum chloride by using kaolinite ore |
| CN101649185A (en) * | 2009-09-02 | 2010-02-17 | 中南大学 | Heat storage material and preparation method thereof |
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