Preparation of cellulose-SiO2 and its application in purifying transformer oil
Transformer insulating oil will gradually deteriorate during the operation of power equipment,resulting in a significant reduction in the electrical,physical and chemical properties of transformer oil.In this paper,the adsorption phase reaction technology is used to solidify hydrophilic SiO2 nanoparticles on microcrystalline cellulose(MCC),to prepare modified cellulose dust collector materials with high adsorption performance,to purify and treat dirty transformer oil by combining with electrostatic adsorption technology.For the SiO2 modified cellulose dust collector material,it can be concluded through the oil purification effect test that,the best preparation condition is dissolution and drying for 12 h,and adding 6 g ethyl orthosilicate(TEOS)as a silicon source.Then,the modified cellulose dust collector material prepared above conditions is placed in the electrostatic oil purification reactor.After synergistically purified by the two methods,the transformer oil's main operational indicators such as moisture reduces from 32.0 mg/L(the initial value)to 23.5 mg/L or less,and other key indexes including medium loss factor,acid value and volume resistivity have reached the national standard of operational oil.It shows that the electrostatic technology combined with modified cellulose adsorbent material can effectively adsorb the impurity particles in the oil.
celluloseSiO2 modified celluloseelectrostatic oil purification technologytransformer oiladsorbent material
万方数据
