This technology uses natural vegetable oil as the main raw material, which is purified by dewaxing, decoloring, deodorization, alkali refining, washing, compounding, drying and so on. Natural mineral oil can be used as a substitute for mineral insulating oil, which can avoid the large amount of CO2 emission during the process of treatment and the treatment of mineral insulating oil. At the same time, in the production process, the plant insulation oil requirements of temperature and pressure is lower than mineral oil, energy consumption is relatively small, further reducing the CO2 emissions.
1) bleaching technology
The compound adsorbent was used to adsorb the impurity ions, colloid, solid particles, pigment and so on, so as to improve the loss factor and reduce the chroma.
(2) alkali refining technology
There are some free fatty acids in vegetable oil, the fatty acid molecules are unstable and easy to dissociate. Because of free fatty acid and alkali than glycerol faster than that of the free fatty acid saponification lye concentration than saponified glycerol ester of small differences in the technology utilization of free fatty acid and glycerol ester in the saponification reaction of the alkali refining oil, so as to achieve the purpose of removal of free fatty acids.
(3) compounding technology
The structure of vegetable oils containing unsaturated double bonds, in the application process easy and oxygen effect occurred acidification and polymerization reactions, reduce its dielectric properties, so we need to add a certain amount of antioxidants to enhance its antioxidant ability. Compounding technology of edible selected antioxidants, add a specific formula, specific proportion of vegetable insulating oil, to maximize its oxidation stability, so as to keep the breakdown strength, dielectric loss factor, acid value, viscosity stability during use.
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