High-temperature organic heat carrier and production technology thereof

Abstract

A high-temperature organic heat carrier comprises the following compositions (in percent by weight): A, 50%-70% of biphenyl and diphenyl oxide; B, 8%-20% of dibenzyltoluene; C, 10%-35% of hydrogenated terphenyl; D, 0.2%-0.4% of a cleaning agent; E, 0.2%-0.4% of an anti-oxidation anti-corrosion agent; and F, 0.4%-0.8% of an antirust agent. The production steps comprise: 1, adding A biphenyl and diphenyl oxide, B dibenzyltoluene, C hydrogenated terphenyl, D a cleaning agent, E an anti-oxidation anti-corrosion agent and F an anti-rust agent into a reaction kettle, heating to 80-82 DEG C, and mixing with stirring for reaction; 2, dewatering the mixed reaction raw materials in the step 1 by a dewatering tank by utilizing position difference and specific gravity difference; 3, adding an isomerization catalyst, concretely pumping the dewatered raw materials into a raw-material tank for buffering, and sending into an isomerization catalysis reactor by a metering pump to perform isomerization catalytic reaction, so as to combining the sheet-shaped structure into a needle-shaped structure and further to increase the fluidity of the product and reduce condensation point, and performing flash evaporation in a distillation tower to remove unideal compositions; 4, cooling; 5, filtering; and 6, subpackaging.

Description

technical field [0001] The invention belongs to the technical field of heat carrier, and in particular relates to a high-temperature organic heat carrier and a production process thereof. Background technique [0002] The types of organic heat carriers include refined mineral oil type, common synthetic type, and synthetic type with special high thermal stability. [0003] With the development of my country's industrial modernization, the production scale of building materials, printing, pharmaceuticals, chemicals, food, solar power and other industries has expanded, and high-temperature organic heat carriers are urgently needed to transfer heat. At present, there is no production process for organic heat transfer materials above 320°C in China, and importing high-temperature organic heat transfer materials from abroad requires a high cost of 120,000-150,000 yuan per ton, which greatly limits the cost of building materials, printing , pharmaceutical, chemical, food, solar po...

AI Technical Summary

Problems solved by technology

At present, there is no production process for organic heat transfer materials above 320°C in China, and importing high-temperature organic heat transfer materials from abroad requires a high cost of 120,000-150,000 yuan per ton, which greatly limits the cost of building materials, printing , pharmaceutical, chemical, food, solar power generation and other industries; in addition, it also has the disadvantages of poor chemical stability, waste of resources, poor thermal conductivity, and short service life. At present, the demand for organic heat carriers in the domestic market is in the More than 10,000 tons, because the 360°C organic heat carrier provides a high-temperature heat source in the liquid phase state, the physical characteristics of temperature increase and viscosity decrease

For example, the normal working pressure of the organic heat carrier used in the high-temperature liquid state of 350°C is only 0.4-0.5MPa. At the same temperature, the ordinary heat transfer oil is in the state of decomposition and vaporization, and the pressure rises sharply and cannot work normally, which is not conducive to safe production.