A kind of solar thermal fluid for providing vapor phase rust protection and preparation method and application thereof

Abstract

The invention relates to a solar thermal fluid for providing gas-phase rust protection and a preparation method and application thereof. The solar thermal fluid provided by the present invention includes a gas phase corrosion inhibitor component, and the gas phase corrosion inhibitor component includes sodium benzoate and ammonium bicarbonate. The solar thermal fluid provided by the invention has excellent liquid phase and gas phase anti-corrosion properties, not only has excellent corrosion inhibition function in the liquid phase, but also can perform high-efficiency gas phase anti-rust protection for metals, and is suitable for solar water heater heat exchange systems. All metals provide excellent protection, extending the life of the equipment. At the same time, the solar thermal fluid provided by the present invention has the advantages of non-toxicity, environmental protection, etc., and is suitable for being used as a thermal fluid for solar energy equipment such as solar water heaters in practice.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a solar thermal fluid for providing gas-phase rust protection and a preparation method and application thereof. Background technique [0002] The solar heat transfer liquid is the heat transfer medium of the split solar heat exchange system. By circulating in the closed heat exchange system between the collector and the water tank, the heat radiated by the solar radiation on the heat collector plate is transferred to the water tank in time, and the water tank passes through A heat exchange (jacket or coil) transfers heat to the cold water. Thermal energy heat transfer fluid has the advantages of anti-corrosion, anti-freezing, anti-boiling, anti-scaling and so on. [0003] The most commonly used industrial heat transfer fluid is water-glycol type. The main component of heat transfer fluid is ethylene glycol, which is a highly toxic and difficult to biodegrade compound. It is listed ...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent 201410055664.8 discloses "an antifreeze for solar water heaters". The antifreeze uses ethylene glycol as an antifreeze and contains inorganic salts such as borax, sodium phosphate, and sodium nitrate. It has poor environmental performance and short service life.

Chinese patent 201610323730.4 discloses "a solar heat transfer fluid", which is a 1,2-propanediol type solar heat transfer fluid, which uses a nitrogen heterocyclic corrosion inhibitor compounded with an organic acid for long-term protection, but does not have gas phase protection.

At present, most solar heat transfer fluids do not have excellent vapor phase antirust function, so it is urgent to develop solar heat transfer fluids that can provide efficient vapor phase antirust function

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