Method for removing roily oil from degreasing waste liquor in coating wastewater

一种涂装废水中脱脂废液去除乳化油的方法

Abstract

The invention discloses a method for removing emulsified oil in degreasing waste liquor of painting wastewater. The degreasing waste liquor enters a degreasing waste liquor tank after being collected, and then is lifted to a reaction tank by a degreasing waste liquor pump; 18 to 22 percent dilute sulfuric acid is added into the reaction tank and is mixed evenly with the degreasing waste liquor; the dosage of the sulphuric acid is controlled through detecting the pH value so that the pH value is between 2 and 3; the degreasing waste liquor modified by the dilute sulfuric acid is discharged into an oil separation bank for standing; and the higher fatty acid soap in the emulsifier is transformed into the water insoluble fatty acid and is separated, and the fatty acid floating on the degreasing waste liquor is scraped into an oil collection barrel by an oil skimming machine. The method has simple devices, little investment, low cost, and obvious effects on emulsified oil removal.
本发明公开了一种涂装废水中脱脂废液去除乳化油的方法,脱脂废液经收集后进入脱脂废液槽,再由脱脂废液泵提升至反应池,向反应池内投加18-22%浓度的稀硫酸,并与脱脂废液混合均匀,通过检测pH值控制硫酸的投加量,使pH值控制在2~3范围之间;经稀硫酸调整后的脱脂废液排入隔油池中静置,使乳化剂中的高级脂肪酸皂转化为不溶于水的脂肪酸而分离出来,漂浮在脱脂废液上的脂肪酸经撇油机刮入集油桶。本发明所使用的设备简单,投资少,成本低,乳化油去除效果明显。

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    CN-101857340-AOctober 13, 2010江西昌河汽车有限责任公司Painting wastewater treatment process
    CN-101857340-BJuly 27, 2011江西昌河汽车有限责任公司一种涂装废水处理工艺方法
    CN-103387295-ANovember 13, 2013天津市滨海新区津平制桶厂Method for removing emulsified oil in degreasing waste liquid