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Two-gradient phase-change thermal storage material and preparation method thereof

A phase change heat storage and gradient technology, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of high production cost and complex process of adipic acid heat storage materials, and avoid the phenomenon of phase separation, phase separation, etc. The effect of changing latent heat and improving thermal conductivity

Inactive Publication Date: 2017-05-10
CECEP L&T ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN103834366A discloses a phase-change heat storage material for industrial medium temperature and its preparation method. The heat storage material is composed of adipic acid, copper-coated carbon nanotubes and a binder. The carbon nanotubes need to be treated at 400°C and ultrasonically. , surface copper plating treatment and a series of treatment measures, the process is complicated
Chinese patent CN104559936A discloses a phase change heat storage material for medium temperature and its preparation method. The heat storage material is composed of adipic acid, rare earth oxide, graphene and binder, and the production cost of the prepared adipic acid heat storage material is relatively high

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  • Two-gradient phase-change thermal storage material and preparation method thereof
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Embodiment 1

[0026] The raw material components and mass ratio of the two-gradient phase change heat storage material are: p-methoxyphenol 38%, pyrogallol 48%, nano-scale silicon dioxide 6%, nano-scale graphite powder 4%, fatty acid polyoxyethylene Ester nonionic surfactant 2%, hydroquinone 2%.

[0027] Press when preparing figure 1 As shown, first add 100-mesh sieved p-methoxyphenol into the mixing tank, heat to 60-70°C, and stir for 1 hour to completely melt p-methoxyphenol, then add fatty acid polyoxyethylene ester, p-methoxyphenol in sequence Hydroquinone. Continue stirring to raise the temperature to 150-160°C, add pyrogallol through a 100-mesh sieve into the mixing tank, and stir for 2 hours to completely melt the pyrogallol and mix it with p-methoxyphenol, and then add nano-scale Silica and nano-scale graphite powder are melted and adsorbed at a temperature of 150-160°C for 3 hours. The generated phase change material is sent to a granulator to obtain the medium and low temperatu...

Embodiment 2

[0030] The raw material components and mass ratio of the two-gradient phase change heat storage material are: p-methoxyphenol 40%, pyrogallol 46%, nano-scale silicon dioxide 5%, nano-scale graphite powder 5%, fatty acid polyoxyethylene Ester nonionic surfactant 2%, hydroquinone 2%.

[0031] Press when preparing figure 1 As shown, first add 100-mesh sieved p-methoxyphenol into the mixing tank, heat to 60-70°C, and stir for 1 hour to completely melt p-methoxyphenol, then add fatty acid polyoxyethylene ester, p-methoxyphenol in sequence Hydroquinone. Continue stirring to raise the temperature to 150-160°C, add pyrogallol through a 100-mesh sieve into the mixing tank, and stir for 2 hours to completely melt the pyrogallol and mix it with p-methoxyphenol, and then add nano-scale Silica and nano-scale graphite powder are melted and adsorbed at a temperature of 150-160°C for 3 hours. The generated phase change material is sent to a granulator to obtain the medium and low temperatu...

Embodiment 3

[0034]The raw material components and mass ratio of the two-gradient phase change heat storage material are: p-methoxyphenol 42%, pyrogallol 45%, nano-scale silicon dioxide 4%, nano-scale graphite powder 5%, fatty acid polyoxyethylene Ester nonionic surfactant 2%, hydroquinone 2%.

[0035] Press when preparing figure 1 As shown, first add 100-mesh sieved p-methoxyphenol into the mixing tank, heat to 60-70°C, and stir for 1 hour to completely melt p-methoxyphenol, then add fatty acid polyoxyethylene ester, p-methoxyphenol in sequence Hydroquinone. Continue stirring to raise the temperature to 150-160°C, add pyrogallol through a 100-mesh sieve into the mixing tank, and stir for 2 hours to completely melt the pyrogallol and mix it with p-methoxyphenol, and then add nano-scale Silica and nano-scale graphite powder are melted and adsorbed at a temperature of 150-160°C for 3 hours. The generated phase change material is sent to a granulator to obtain the medium and low temperatur...

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Abstract

The invention relates to a two-gradient phase-change thermal storage material and a preparation method thereof. The phase-change thermal storage material is prepared from the following material components in percentage by weight: 38 to 42% of p-methoxyphenol, 45 to 48% of pyrogallol, 4 to 6% of nanometer silica, 3 to 5% of nanometer graphite powder, 2% of polyoxyethylene fatty acid nonionic surfactant and 2% of hydroquinone. The preparation method of the two-gradient phase-change thermal storage material comprises the steps of adding p-methoxyphenol into a mixing kettle; heating to 60 to 70 DEG C; stirring for 1 hour; then sequentially adding the polyoxyethylene fatty acid and the hydroquinone; continuing to stir and heat to 150 to 160 DEG C; adding the pyrogallol into the mixing kettle; after stirring for 2 hours, sequentially adding the nanometer silica and the nanometer graphite powder; carrying out melting adsorption for 3 hours at a temperature of 150 to 160 DEG C; carrying out cooling pelletizing forming to obtain the phase-change thermal storage material. Gradient utilization of industrial waste heat can be implemented, and requirements of users for steam and hot water are met.

Description

technical field [0001] The invention belongs to the technical field of heat storage materials, in particular to a medium and low temperature two-gradient phase change heat storage material and a preparation method thereof. Background technique [0002] my country is rich in industrial waste heat resources, mainly including waste heat of high-temperature exhaust gas, waste heat of cooling medium, waste heat of waste steam and waste water, waste heat of high-temperature products and slag, waste heat of chemical reactions, etc. Waste heat resources account for about 17% to 67% of its total fuel consumption, of which The recovery rate is up to 60%, the waste heat utilization rate has a large room for improvement, and the energy saving potential is huge. However, thermal energy has disadvantages such as time discontinuity, spatial difference, and intensity instability in the utilization, which greatly limits its large-scale application. Heat storage technology utilizes the intern...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 李朝晖赵良庆吴轩潘利祥卜庆国姜朵朵于松耿丽娟
Owner CECEP L&T ENVIRONMENTAL TECH
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