Organic high temperature thermal conductive liquid

Abstract

The invention discloses an organic high temperature thermal conductive liquid. The organic high temperature thermal conductive liquid is prepared via segmented heating, stirring, and mixing of propylene glycol, triethanolamine, hexamethylphosphorous triamide, 3-(diphenylphosphino)propylamine, benzotriazole, poly(methacrylic acid), and polymaleic anhydride with a polymerization degree of 6000 at an environment free of oxygen. Corrosion inhibition and anti-scaling properties of the organic high temperature thermal conductive liquid are excellent, reserve alkalinity is higher than 20ml, heat-conducting medium long effectiveness is guaranteed; heat conductivity coefficient is slightly higher than that of thermal conductive oil; and the organic high temperature thermal conductive liquid can be used for replacing thermal conductive oil completely at a temperature ranging from -50 to 190 DEG C. Performance of the organic high temperature thermal conductive liquid is stable at high temperature; application environmental conditions are wide; the corrosion inhibition and anti-scaling properties last long; the organic high temperature thermal conductive liquid is friendly to the environment, and is high in heat conductivity coefficient; the raw materials are easily and directly available, and are cheap; equipment requirements are few; and large scale industrialized production is convenient to realize.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to an organic high-temperature heat-conducting fluid. Background technique [0002] At present, the important heat transfer medium of heating oil furnace in industrial production is heat transfer oil. It has the characteristics of uniform heating, accurate temperature control, high temperature under low vapor pressure, good heat transfer effect, energy saving, convenient transportation and operation, etc., and has been widely used in various indirect heat transfer fields in recent years. Although there are many advantages of heat transfer oil, there are also many disadvantages of collapse. (1) Coking. During use, due to local overheating of the heating system and long working hours, thermal cracking reactions are prone to occur, resulting in volatile and low-flash point oligomers, and polymerization reactions between oligomers to form infusible and insoluble polymers. Attached ...

AI Technical Summary

Problems solved by technology

After the coking phenomenon occurs, it not only hinders the flow of heat transfer oil, reduces heat transfer efficiency and increases fuel consumption, but also causes local overheating and deformation of the pipeline to cause explosion, which seriously threatens the operation of equipment and the personal safety of operators.

(2) corrosion

Under the condition of incomplete nitrogen sealing effect, the heat transfer oil will be oxidized to form phytic acid and colloids to adhere to the oil pipeline after long-term high-temperature operation, which not only affects the service life of the heat transfer medium, blocks the pipeline, but also easily causes pipeline damage. Acid corrosion, increasing the risk of leakage in system operation

Moreover, due to its complex composition, it is particularly difficult to add corrosion and scale inhibitors to solve its corrosion problems. At present, there is no successful case of adding corrosion inhibitors to heat transfer oil to solve its corrosion

(3) Short time limit

(4) The operating environment has strict requirements, especially for water, and a small amount of water can bring great harm to the system operation

However, when propylene glycol is used as the base liquid and mixed with water, the freezing point will increase significantly, and the boiling point will be greatly reduced, which limits the use range of the propylene glycol aqueous heat transfer medium at high temperatures.

Using pure propylene glycol as the heat transfer medium can increase the boiling point, but its solubility for inorganic corrosion and scale inhibitors is small, and it cannot achieve good corrosion and scale inhibition effects. Moreover, there are almost no corrosion and scale inhibitors composed entirely of organic matter.