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一、前言由于原油性质变重,含环烷酸成分明显增加,我厂近两年来常压一、二线柴油碱洗电精制尽管采取了提高温度、提高电压、降低碱浓度等措施,但乳化仍十分严重,将碱性乳化水带到柴油罐区由各罐脱水排至含油污水系统时,其COD值达几万～十几万毫克/升,有时高达几十万毫克/升。柴油罐区不定期脱水。目前每月约脱水40—120吨沿含油
I. Preface Due to the heavy nature of the crude oil, naphthenic acid composition increased significantly, the last two years our plant atmospheric pressure a second-line diesel alkaline cleaning Although taking measures to increase temperature, raise the voltage, reduce the alkali concentration, but the emulsification is still Very serious, the alkaline emulsion water to the diesel tank area by the tank dewatering discharge to oily sewage system, the COD value of tens of thousands ~ hundreds of thousands of milligrams / liter, sometimes up to hundreds of thousands of milligrams / liter. Diesel tank area from time to time dehydration. Currently about 40-120 tons of dehydration per month along the oil