Low-viscosity ultra-low temperature two-way wide temperature brine

Abstract

The invention discloses a low-viscosity ultralow-temperature bidirectional wide-temperature secondary refrigerant. The low-viscosity ultralow-temperature bidirectional wide-temperature secondary refrigerant is a composition consisting of the following components in percentage by weight: 80%-99% of glycol alkyl ether compounds, 0.1%-9% of an corrosion inhibitor, 0-1% of a scale inhibitor and 0.9%-10% of functionality regulating liquid; the pH value of the composition is 8-10. The low-viscosity ultralow-temperature bidirectional wide-temperature secondary refrigerant is non-toxic, harmless and non-volatile, is not nonflammable and explosive and does not corrode metal equipment, so that the consumption is reduced, and the service life of the equipment can be prolonged; meanwhile, the low-viscosity ultralow-temperature bidirectional wide-temperature secondary refrigerant has very good fluidity at low temperature, is a safe heat transfer medium with an excellent heat transfer property, does not precipitate and scale and has the properties of cold carrying, heat transfer, corrosion inhibition and bacteria inhibition; the low-viscosity ultralow-temperature bidirectional wide-temperature secondary refrigerant suitable for being used as a cold-carrying and heat-transfer medium at (-75) to (240) DEG C in the industrial field and is very applicable to indirect heat transfer systems used in chemical industry production and medical synthesis processes.

Description

technical field [0001] The invention relates to a heat transfer medium for industrial production, in particular to an ultra-low temperature bidirectional wide-temperature energy-saving refrigerant used in indirect heat transfer systems in chemical production and pharmaceutical synthesis processes. Background technique [0002] In many industrial production fields such as chemical industry and pharmaceutical industry, it is closely related to temperature. There are high temperature, low temperature, endothermic reaction and exothermic reaction. In order to keep the system temperature at the state required by the process conditions, it is actually done by transferring heat in or out through the serpentine tube inside the reactor or the heat transfer medium flowing in the interlayer outside the reactor. Commonly used heat transfer media include aqueous solutions of inorganic salts and aqueous alcohols. These aqueous heat transfer media have poor heat transfer performance and a...

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Problems solved by technology

These aqueous heat transfer media have poor heat transfer performance and are severely corrosive to metal materials. On the one hand, these defects affect the heat transfer effect, and on the other hand, greatly shorten the service life of refrigeration equipment, which has long restricted the development of the refrigeration industry.

[0004] In recent years, the LM series heat transfer medium (trade name Glacier Refrigerant) promoted in the Chinese market has excellent anti-rust performance and strong cooling capacity, and can be used at -100°C. However, this type of product has certain volatility and is used in food , The use of the pharmaceutical industry still lacks safety guarantees

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