Analysis of Particular Pollutants in Waste Transformer Oil

Abstract

Waste pollutions and disposal problems of transformer substation in electric power industry were paid more and more attention by people. Waste transformer oil contained many kinds of toxic substances. Transformer oil belongs to hazardous waste according to the definition of the United Nations Environment Programme (UNEP) and the National Hazardous Waste Inventory in China. The related research on environmental pollutants in waste transformer oil was less. The composition and content of particular pollutants which is harmful to human health and ecological environment in waste transformer oil was studied in this paper. Gas chromatography-mass spectrometry was chosen to detect the organic pollution composition and content of particular pollutants in transformer oil, based on investigation and analysis. Transformer oil samples running different time under 10KV voltage level were detected. The test results showed that with turbidity of oil rising, the content of polycyclic aromatic hydrocarbons in waste transformer oil increased, while benzene content changed in the opposite trend. Complex composition, different origin and different operating conditions were the reasons of difficulty to separate organic components in transformer oil during detection. This study is helpful for safe disposal of waste transformer oil. And it also can provide some theoretical support to eliminate the harm of the polycyclic aromatic hydrocarbons and benzene series.