壳聚糖-膨润土吸附剂的制备及其对变压器废油的再生性能

PREPARATION OF CHITOSAN-BENTONITE ADSORBENT AND ITS REGENERATION PERFORMANCE FOR TRANSFORMER WASTE OIL

为了解决变压器废油的再生问题,以壳聚糖(CS)和膨润土(BT)为原料制备了一种复合吸附剂,并考察其对变压器废油的再生脱色除杂性能。结果表明:当CS添加量(CS BT质量比)为5%、焙烧温度为300℃时,制备的C5 BT-300复合吸附剂的脱色除杂性能最佳;以C5 BT-300复合吸附剂吸附处理变压器废油的最佳工艺条件为:吸附剂质量分数4%,吸附温度50℃,吸附时间90 min。经C5 BT-300复合材料一次吸附处理后,变压器废油的透光率提高至99.5%,色号降至1号,击穿电压提高了60.2%,介质损耗因数、水质量浓度、酸值分别降低了80.7%,68.7%,74.1%。相较于常见的膨润土、活性炭等吸附剂,C5 BT-300复合材料表现出了更好的吸附再生性能。此外,为了提高吸附剂的处理效率,开发了便捷、高效、智能、绿色的变压器废油再生装置,并优化了变压器废油的再生流程和处理后吸附剂的再生流程。

In order to solve the problem of regeneration of transformer waste oil,a composite adsorbent was prepared from chitosan(CS)and bentonite(BT)as raw materials.The results showed that when the mass ratio of CS to BT was 5%and the calcination temperature was 300℃,the decolorization and impurity removal performance of C5 BT-300 composite adsorbent was the best.The optimum process conditions for the treatment of transformer waste oil by using the composite adsorbent C5 BT-300 were as follows:the mass fraction of the adsorbent was 4%,the adsorption temperature was 50℃,and the adsorption time was 90 min.After the treatment of C5 BT-300 composite,the light transmittance of transformer waste oil increased to 99.5%,the color number decreased to No.1,and the breakdown voltage increased by 60.2%;the dielectric loss factor,water concentration and acid value were reduced by 80.7%,68.7%and 74.1%,respectively.Compared with common adsorbents such as bentonite and activated carbon,C5 BT-300 composite showed better adsorption and regeneration performance.In addition,a convenient,efficient,intelligent and green regeneration device for transformer waste oil was developed,and the regeneration process of transformer waste oil and the regeneration process of adsorbent after treatment were optimized.