CN1309797C - Composite inorganic salt/ceramic-base heat-accumulating material and its preparing process - Google Patents
Composite inorganic salt/ceramic-base heat-accumulating material and its preparing process Download PDFInfo
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- CN1309797C CN1309797C CNB001171674A CN00117167A CN1309797C CN 1309797 C CN1309797 C CN 1309797C CN B001171674 A CNB001171674 A CN B001171674A CN 00117167 A CN00117167 A CN 00117167A CN 1309797 C CN1309797 C CN 1309797C
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Abstract
The present invention relates to a composite inorganic salt and ceramic base heat accumulating material and a preparation method thereof. The composite inorganic salt and ceramic base heat accumulating material is a high temperature phase change heat accumulating material made of ceramic and inorganic salts and has the characteristics of high heat accumulating density, direct contact with a heat-transfer fluid and potential heat release at stable temperature. The composite inorganic salt and ceramic base heat accumulating material contains 20 to 30 wt% of Na2CO3, 18 to 28 wt% of BaCO3, 44 to 50 wt% of MgO and 3 to 7 wt% of Bi2O3, or 45 to 53 wt% of Na2SO4, 42 to 52 wt% of SiO2 and 3 to 7 wt% of Bi2O3. The preparation method comprises the steps that (1) the raw materials are mixed according to the formula; (2) anhydrous alcohol is used as a grinding aid and the raw materials are pulverized by a ball mill pulverizing way; (3) the pulverized raw materials are dried and pressed to be formed; (4) the forming materials are sintered at high temperature and the optimal sintering temperature is from 850 DEG C to 1000 DEG C. The present invention has the advantages of simple and convenient preparation process, easy control and is suitable for large-scale industrial production.
Description
The present invention relates to a kind of heat accumulation with composite phase-change heat-storage material and preparation method thereof, belong to thermal technology and field of energy source materials.
Composite inorganic salt/ceramic-base heat-accumulating material belongs to the cohesiveness porous media material, and important effect is arranged in energy field.The research of composite inorganic salt/ceramic-base heat-accumulating material from producing this new notion till now, has obtained tangible progress, provides basic basis for material productization and in the application of industrial thermophore and solar power system.But all there is problem in original this matrix material in varying degrees: salt in the solid-liquid phase change process volume collapse the variation that can cause the matrix material thermal resistance; The share of fused salt evaporation will minimizing phase change material reduces thermal storage performance.
Purpose of the present invention is exactly to want to improve on the basis of former result of study the performance of inorganic salt/ceramic-base composite phase-change heat-storage material, develop that a kind of heat storage capacity is big, during phase transformation heat release stable and can avoid or reduce the material of Evaporation Phenomenon; Make it can in the application of heat reservoir and thermophore, popularize use.
The inorganic salt/ceramic-base composite phase-change heat-storage material is in fusing and process of setting, the generation of inorganic salt gas phase means the loss of phase change material quality, this will cause composite phase-change material long term thermal performance decrease, the air film that while gaseous state inorganic salt form between fused salt and ceramic base capillary hole wall will increase thermal conduction resistance, be unfavorable for the transmission of fused salt latent heat, so the generation of fused salt gas phase and be the key of problem to the influence of material phase transformation process.We are through discovering: only in several microns the inorganic salt/ceramic-base matrix material of ultra micro vesicular structure, inorganic salt are distributed in the ultra micro porous network of ceramic matrix at particle diameter.When being heated and surpassing fusing point, inorganic salt fusing and undergo phase transition and absorb heat, fused salt does not then flow out because of the capillary tension with the generation of ultra micro porous channel remains in the ceramic matrix.On the other hand, owing to be ultra tiny network vesicular structure, can also avoid the generation of inorganic salt gas phase effectively.
The NEW TYPE OF COMPOSITE heat accumulating that the present invention introduced is that a granularity is a micron order, and the saturated inorganic salt ceramic body porous medium that contains of the formation ultra micro network structure that is connected behind the sintering, and this composite inorganic salt/ceramic-base heat-accumulating material is by weight percentage: Na
2CO
320-30%, BaCO
318-28%, MgO 44-50%, Bi
2O
33-7%; Perhaps composition is: Na
2SO
445-53%, SiO
242-52%, Bi
2O
33-7%; Its preparation method is as follows: (1) is prepared burden, is mixed according to above-mentioned prescription; (2) use dehydrated alcohol as grinding aid, adopt the ball mill pulverizing mode that raw material is pulverized, grind to form the micron order superfine powder; (3) oven dry, extrusion forming, shape is that size, the structure according to thermophore determined, can be sphere, brick shape etc.; (4) carry out high temperature sintering in sintering oven, sintering temperature is: 850 ℃-1200 ℃, the final high temperature sintering forms the composite inorganic salt/ceramic-base heat-accumulating material that particle diameter has only several microns ultra micro vesicular structure.
The inorganic salt/ceramic-base composite phase-change heat-storage material product performance that thermal characteristics of developing with the present invention and mechanical property all satisfy industrial application are as follows: 880～900 ℃ of melt temperatures, total heat storage capacity 180～200J/g, the top temperature of its use reaches 900～1300 ℃.
The present invention compares with technology with existing heat accumulating, have following advantage and positively effect: this material can be made into the element of different shape, pile up the formation heat reservoir with the packed bed form, be in operation, utilize the latent heat of inorganic salt and the sensible heat heat energy storage of matrix material simultaneously.This latent heat/sensible heat composite system had both kept the characteristics that hidden heat energy storage density is big and energy output is stable, have again the sensible heat energy-accumulating medium can with the advantage of the direct contact heat-exchanging of heat exchanging fluid, also overcome the shortcoming that the latent heat storage system need expend a large amount of metal vessels, tubing and have fused salt corrosion.It can be used for thermophore, the waste heat recovery of iron-making heat wind furnace of industrial furnace, also has the solar energy heat-storage system.This matrix material can be used for replacing the refractory brick or the plate of traditional thermophore and hotblast stove, makes its heat storage capacity bigger 2～2.5 times than existing thermophore and hotblast stove refractory brick, when improving the heat reservoir performance, has reduced cost greatly.Economic analysis shows, uses the high temperature energy-storage system of this material, and the cost permission line reduction by 30% than legacy system as specifically being used for hotblast stove, will make its volume reduce 35%, and cost reduces by 11%.
Claims (2)
1. composite inorganic salt/ceramic-base heat-accumulating material, said composite inorganic salt/ceramic-base heat-accumulating material is by weight percentage: Na
2CO
320-30%, BaCO
318-28%, MgO 44-50%, Bi
2O
33-7%; Perhaps composition is: Na
2SO
445-53%, SiO
242-52%, Bi
2O
33-7%; Its preparation method may further comprise the steps: prepare burden according to prescription (1), and (2) as grinding aid, adopt the ball mill pulverizing mode that raw material is pulverized with dehydrated alcohol, (3) oven dry, extrusion forming, and (4) high temperature sintering, sintering temperature is: 850 ℃-1200 ℃.
2. the preparation method of a composite inorganic salt/ceramic-base heat-accumulating material, said composite inorganic salt/ceramic-base heat-accumulating material is by weight percentage: Na
2CO
320-30%, BaCO
318-28%, MgO 44-50%, Bi
2O
33-7%; Perhaps composition is: Na
2SO
445-53%, SiO
242-52%, Bi
2O
33-7%; Its preparation method may further comprise the steps: prepare burden according to prescription (1), and (2) as grinding aid, adopt the ball mill pulverizing mode that raw material is pulverized with dehydrated alcohol, (3) oven dry, extrusion forming, and (4) high temperature sintering, sintering temperature is: 850 ℃-1200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001171674A CN1309797C (en) | 2000-06-13 | 2000-06-13 | Composite inorganic salt/ceramic-base heat-accumulating material and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001171674A CN1309797C (en) | 2000-06-13 | 2000-06-13 | Composite inorganic salt/ceramic-base heat-accumulating material and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1328107A CN1328107A (en) | 2001-12-26 |
| CN1309797C true CN1309797C (en) | 2007-04-11 |
Family
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| CNB001171674A Expired - Fee Related CN1309797C (en) | 2000-06-13 | 2000-06-13 | Composite inorganic salt/ceramic-base heat-accumulating material and its preparing process |
Country Status (1)
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| CN (1) | CN1309797C (en) |
Families Citing this family (15)
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| CN101691483B (en) * | 2009-10-14 | 2011-07-27 | 清华大学 | Method for preparing sodium sulfate/silicon oxide shaped phase change material by using rice hull ash as raw material |
| CN102093036B (en) * | 2009-12-09 | 2013-06-05 | 沈阳临德陶瓷研发有限公司 | MgO ceramic-based composite phase change heat storage material and self-curing molding preparation process thereof |
| CN102721029A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Method and apparatus for recovering and utilizing sensible heat from liquid blast furnace slag |
| CN103868074A (en) * | 2014-03-19 | 2014-06-18 | 江苏星瑞化工工程科技有限公司 | Waste burning recycling system |
| CN105349112B (en) * | 2014-08-18 | 2019-03-15 | 武汉理工大学 | A kind of high temperature fused salt/Ceramic Composite heat storage and preparation method thereof |
| CN105577034B (en) * | 2016-03-23 | 2017-09-05 | 武汉喜玛拉雅光电科技股份有限公司 | The preparation method of multistage coupling high temperature sensible heat latent heat phase-change accumulation energy temperature difference electricity generation device |
| CN109021928A (en) * | 2017-06-09 | 2018-12-18 | 徐辉 | Heat accumulation module and preparation method thereof for heat storage type electric heater |
| CN108048044A (en) * | 2017-12-12 | 2018-05-18 | 天津琪臻节能科技有限公司 | Inorganic salts-ceramic base thermal energy storage material and preparation method thereof |
| CN109135683B (en) * | 2018-08-22 | 2021-01-12 | 北京科技大学 | Method for preparing molten salt-ceramic phase change heat storage material |
| CN111004018B (en) * | 2019-11-25 | 2022-04-01 | 全球能源互联网研究院有限公司 | High-temperature phase-change heat storage material, heat storage brick and preparation method thereof |
| CN111205827A (en) * | 2020-01-10 | 2020-05-29 | 北京科技大学 | Method for preventing loss of molten salt phase change heat storage material by using activated carbon |
| CN111793474B (en) * | 2020-07-24 | 2021-10-12 | 中国科学院上海应用物理研究所 | Assembling method of expanded graphite enhanced heat conduction ceramic matrix-shaped high-temperature phase change heat storage element and heat storage element formed by same |
| CN114271668B (en) * | 2020-09-27 | 2023-11-24 | 武汉苏泊尔炊具有限公司 | Cooking utensil and processing method thereof |
| CN112409991A (en) * | 2020-10-19 | 2021-02-26 | 华北电力大学 | Novel ceramic-based solid-solid phase change heat storage material and preparation method thereof |
| CN113429940B (en) * | 2021-07-12 | 2022-05-20 | 华中科技大学 | Nano silicon carbide reinforced heat storage composite phase-change heat storage material and preparation method thereof |
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Patent Citations (6)
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|---|---|---|---|---|
| CN1034017A (en) * | 1988-01-09 | 1989-07-19 | 西北大学 | Utilize dress composition of raw materials in the heat-retaining human body temperature heat device of thermal capacitance-heat of phase transformation |
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| Publication number | Publication date |
|---|---|
| CN1328107A (en) | 2001-12-26 |
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Inventor after: Zhang Renyuan Inventor after: Liu Liangde Inventor after: Ke Xiufang Inventor after: Li Aiju Inventor before: Zhang Renyuan Inventor before: Liu Liangde Inventor before: Ke Xiufang |
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Free format text: CORRECT: INVENTOR; FROM: ZHANG RENYUAN; LIU LIANGDE; KE XIUFANG TO: ZHANG RENYUAN; LIU LIANGDE; KE XIUFANG; LI AIJU |
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Granted publication date: 20070411 |