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Sodium silicate-molten ternary nitrate compounded heat-transfer heat-storage medium and its preparation method and use

A heat storage medium and water glass technology, applied in chemical instruments and methods, heat exchange materials, sustainable manufacturing/processing, etc., can solve problems such as small heat of solution, low working temperature, and low thermal conductivity, and achieve the goal of using Wide temperature range, improved thermal energy utilization, good thermal stability

Active Publication Date: 2014-07-09
QINGHAI ENESOON NEW MATERIAL TECH & SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The melting point of the ternary nitrate system is relatively low, which is ideal, but the upper limit working temperature is relatively low, and the heat of solution is small and the thermal conductivity is low
[0007] So far, there is no report on adding water glass to ternary nitric acid molten salt as a heat transfer and heat storage medium in the field of industrial energy storage and solar thermal power generation

Method used

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  • Sodium silicate-molten ternary nitrate compounded heat-transfer heat-storage medium and its preparation method and use
  • Sodium silicate-molten ternary nitrate compounded heat-transfer heat-storage medium and its preparation method and use
  • Sodium silicate-molten ternary nitrate compounded heat-transfer heat-storage medium and its preparation method and use

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Embodiment 1

[0053] Embodiment 1, the preparation method of water glass composite ternary nitric acid molten salt heat transfer heat storage medium of the present invention

[0054] Materials used: sodium silicate and potassium silicate, all purchased from Dali Zhongfashui Glass Factory, Nanhai District, Foshan City;

[0055] Potassium nitrate, sodium nitrate, sodium nitrite, industrial grade, can be purchased from general chemical companies.

[0056] 1. Preparation method:

[0057] The preparation method of water glass composite ternary nitric acid molten salt heat transfer heat storage medium of the present invention has two kinds of options:

[0058] Method I, the preparation steps of water glass composite ternary nitric acid molten salt heat transfer heat storage medium of the present invention are as follows:

[0059] According to the mass percentage content of each component, mix potassium nitrate, sodium nitrate, sodium nitrite and water glass and stir evenly, statically heat to a...

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Abstract

The invention discloses a sodium silicate-molten ternary nitrate compounded heat-transfer heat-storage medium and its preparation method and use. The sodium silicate-molten ternary nitrate compounded heat-transfer heat-storage medium is characterized in that the sodium silicate-molten ternary nitrate compounded heat-transfer heat-storage medium is prepared by compounding a molten ternary nitrate system and sodium silicate, and the molten ternary nitrate system mainly comprises potassium nitrate, sodium nitrate and sodium nitrite. The sodium silicate-molten ternary nitrate compounded heat-transfer heat-storage medium has heat-transfer performances of the molten nitrate, improves a safe work temperature upper limit of the system to 650 DEG C, has a wide use temperature range and good thermal conductivity, and can be widely used in the technical field of solar photo-thermal power generating.

Description

technical field [0001] The invention relates to the technical field of heat storage and transfer, in particular to a water glass composite ternary nitric acid molten salt heat transfer heat storage medium and a preparation method and application thereof. Background technique [0002] In industrial energy storage and solar thermal power generation technologies, the heat storage and heat transfer media currently used mainly include air, water, heat transfer oil, molten salt, sodium and aluminum and other metals. Molten salt has become a potential heat transfer and heat storage medium in solar thermal power generation technology due to its wide operating temperature range, low vapor pressure, low viscosity, good stability, and low cost. A relatively mature heat transfer and heat storage medium. High-temperature molten salts mainly include nitrates, carbonates, sulfates, fluorides, chlorides, oxides, etc. [0003] The outstanding advantages of the nitric acid molten salt syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/12
CPCY02P20/10
Inventor 曾智勇
Owner QINGHAI ENESOON NEW MATERIAL TECH & SCI CO LTD
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