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Method for producing phase change energy storage wax

A phase change energy storage and Fischer-Tropsch synthetic wax technology, applied in the chemical industry, can solve the problems of decreased product yield, prolonged sweating time, long production cycle, etc., and achieves low production cost, improved solid-liquid separation efficiency, and improved product quality. Effect

Pending Publication Date: 2020-05-05
INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the common sweating and deoiling method, although the solid component (wax with a higher melting point) and the liquid component (wax with a lower melting point) are in two phase states of solid and liquid respectively in the process of heating up and sweating, But it is also difficult to completely separate
In order to make the oil content of the final product meet the requirements, the method of prolonging the sweating time and raising the sweating termination temperature is usually adopted, but this will lead to a long production cycle and a decrease in product yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Use 400-430°C distillate as raw material, heat and melt the distillate wax, put it into the sweating device, cool it down to normal temperature and keep it constant for 2 hours, then cool it down to 0°C at a rate of 5°C / h in the programmed cooling device, and Keep the temperature constant for 2 hours, start the temperature program, raise the temperature to 35°C at a rate of 10°C / h, and keep the temperature constant for 2 hours; raise the temperature to 43°C at a rate of 5°C / h, and keep the temperature constant for 2 hours; The temperature was raised to 54°C at a rate of 1°C / h, and the temperature was kept constant for 24 hours; the oil under the wax was collected, and the yield was 28%; the product on the remaining wax was a phase change wax product, with a melting point of 59±1°C and an enthalpy value of ≥180KJ / kg.

Embodiment 2

[0038] Use 460-490°C distillate as raw material, heat and melt the distillate wax, put it into the sweating device, cool it down to normal temperature naturally and cool it down to 0°C at a rate of 5°C / h in the programmed cooling device, and keep the temperature for 2 hours, Start the temperature program, raise the temperature to 30°C at a rate of 15°C / h for 1 hour, raise the temperature to 50°C at a rate of 10°C / h for 1 hour, raise the temperature to 55°C at a rate of 5°C / h for 2 hours, and raise the temperature at a rate of 5°C / h Keep the temperature at 60°C for 2 hours, raise the temperature to 68°C at a rate of 1°C / h for 12 hours, then raise the temperature at a rate of 1°C / h to 70°C for 24 hours, collect the oil under the wax, and the yield is 32%. layer, the product on the remaining wax is a phase change wax product, the product phase change temperature is 72±1°C, and the enthalpy value is ≥200KJ / kg.

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Abstract

A method for producing phase change energy storage wax comprises the following steps: refining a Fischer-Tropsch synthetic wax raw material through hydrogenation reaction to obtain Fischer-Tropsch refined wax; primarily separating the Fischer-Tropsch refined wax to obtain a plurality of fractions; selecting a target fraction from the plurality of fractions to carry out sweating treatment to obtainphase change energy storage wax, wherein a sweating device adopted in the sweating treatment is provided with a tubular heat exchanger structure. According to the method, the raw material treatment process is simple, and the production cost is low. By adopting the improved sweating process, the solid-liquid separation efficiency can be improved, the separation effect is improved, and finally theproduct quality is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for producing phase-change energy storage wax. Background technique [0002] Phase change energy storage technology can solve the contradiction of energy supply imbalance in time and space, improve energy utilization and protect the environment. Phase change materials refer to materials that can absorb or release a large amount of heat energy when they use their own state changes. Phase change energy storage wax is one of the phase change energy storage materials, which can effectively avoid the overcooling and phase separation of inorganic phase change materials, and overcome the shortcomings of inorganic phase change materials that cannot be reused many times. It can be used in many fields such as aerospace, solar energy utilization, power system peak regulation, industrial waste heat recovery, building heating and household appliances. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 苗恒潘金亮郑会月周岩马国清郭良兰
Owner INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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