TiO_(2)-微晶纤维素的制备及其净化电力绝缘油的性能

Preparation of TiO_(2)-microcrystalline cellulose and its performance in purifying power insulating oils

电力用绝缘油是许多一、二次电气设备的关键绝缘介质,油品的老化是其产生一系列氧化产物的结果,将导致绝缘油的绝缘、灭弧性能降低,不仅会对电网造成冲击还可能出现火灾等重大安全事故。本文采用水热合成法,将亲水TiO_(2),纳米颗粒固载在微晶纤维素(MCC)上,制备出具有高吸附性能的改性纤维素集尘体材料,并应用于静电吸附技术中净化处理脏污变压器油。通过油品净化效果测试得出,TiO_(2),改性纤维素集尘体材料在水热温度为180℃、水热时间为20h条件下,MCC与钛酸四丁酯加人量的最佳摩尔比为1:2.5。将该条件下合成的TiO_(2),改性纤维素制备成集尘体材料,结合静电净油反应器处理脏污变压器油。测试结果:净化后的油品各主要指标均优于单独使用静电净油反应器,且均达到220kV运行油国家标准。

Insulating oil for electric power is the key insulating medium for many primary and secondary electrical equipment,and the aging of the oil is the result of a series of oxidation products,which will lead to a reduction in the insulation and arc extinguishing performance of the insulating oil,and not only the impact on the power grid,but also the possibility of fire and other major safety accidents.In this paper,the hydrothermal synthesis method,the hydrophilic TiO_(2)nanoparticles solidloaded on microcrystalline cellulose(MCC),prepared with high adsorption performance of the modified cellulose dust collector material,and applied to the e-lectrostatic adsorption technology to purify and treat dirty transformer oil.Through the oil purification effect test,it is concluded that the optimal hydrothermal temperature of TiO_(2)modified cellulose dust collector material is 180 C,the hydrothermal time is 20 h,and the optimal molar ratio of MCC and tetrabutyl titanate is 1:2.5.The TiO_(2)modified cellulose synthesized under these conditions is prepared into dust collector material,which is combined with the electrostatic oil purification reactor to deal with the dirty transformer oil.Test results:the main indicators of the purified oil are better than those of the electrostatic oil purification reactor alone,and all of them reach the national standard of 220 kV operating oil.