Composite chemical heat conducting medium and preparation method thereof

Abstract

The invention provides a composite chemical heat conducting medium, which comprises a basic liquid and a buffer agent. The buffer agent accounts for 1 to 8% of the total weight of the composite chemical heat conducting medium and comprises following components in parts by weight: 55 to 85 parts of distilled water, 4 to 10 parts of potassium dihydrogen phosphate, 4 to 10 parts of potassium sulfate,1 to 6 parts of sodium chloride, 3 to 9 parts of glycol, and 3 to 10 parts of glycerol. The preparation method comprises following steps: adding potassium dihydrogen phosphate, potassium sulfate, andsodium chloride into distilled water, mixing to obtain an inorganic water solution; mixing the inorganic water solution with glycol and glycerol, transferring the mixed solution to a vacuum glove box, carrying out nitrogen replacement until all air is discharged, controlling a temperature of 55 to 75 DEG C, heating, adding a corrosion inhibitor, heating, and stirring until pH value reaches 7.5-8.5. The provided heat conducting medium has an excellent heat conducting performance, a good high temperature boiling-resistant performance, and high safety, is suitable for various high temperature/low temperature work environments, also has an excellent corrosion inhibition performance, and can be used for a long term stably.

Description

technical field [0001] The invention belongs to the technical field of heat conduction, and in particular relates to a composite chemical heat conduction medium and a preparation method thereof. Background technique [0002] Heat conduction medium has been widely used in current life and industrial processes, and can be used in energy equipment such as industrial waste heat recovery, solar energy, high-pressure boilers, civil heating, industrial drying, food drying, and atmospheric pressure boilers. For example, there is a large amount of waste water and waste gas in industrial production, which contain a lot of heat energy. If the heat released during the production process is properly utilized and controlled, it can not only save energy consumption in production, but also reduce production costs. In winter, the cost of heating in winter in the north of my country is very high every year. The coal and oil burned emit a lot of pollutants and pollute the environment. Most of ...

AI Technical Summary

Problems solved by technology

The boiling point of the heat transfer medium will also have a great impact on the high temperature resistance of the entire heat exchange system. However, the boiling point of many heat transfer media on the market is only 90-100°C, which is volatile and requires frequent replenishment of water.

The heat collector, circulation pipeline, water pump and water tank in the heat conduction system are composed of steel, cast iron, brass, copper, aluminum and stainless steel. Due to the different potentials of the electrodes of different metals, electrochemical corrosion is prone to occur under the action of electrolytes. At the same time Alcohols in the heat transfer fluid will decompose to form acidic products, which will also promote the corrosion of the heat transfer system, resulting in poor water circulation, blockage of pipes, slow or no rise in water temperature, and if the corrosion is perforated, the heat transfer fluid will seep into the water tank and cause damage to consumers. bring health risks