摘要：

以单一硫酸铝作为破乳剂，对自配的不同含油量的拉丝油乳化液进行破乳，测定了破乳后水层的COD、浊度、pH，并计算了COD、浊度去除率。然后分别考察了单独使用硫酸铝以及使用硫酸铝-聚合氯化铝复合破乳剂对实际生产中得到的中、高含油量拉丝油乳化废液进行破乳的效果。结果表明：在几种破乳剂中，使用硫酸铝对自配的拉丝油乳化液进行破乳有较好的效果，在破乳后，COD、浊度去除率可以分别达到70%、60%。单独使用硫酸铝对中、高含油量的拉丝油乳化废液进行破乳的效果不佳，乳化废液的油水不分层，而硫酸铝-聚合氯化铝复合破乳剂在硫酸铝和聚合氯化铝同时加入时则具有较好的效果，在搅拌器转速为500 r/min，搅拌总时间为10 min，搅拌后静置时间为30 min的条件下，中含油量废液破乳后水层的COD、浊度去除率可分别达到98%、91%，高含油量废液的COD、浊度去除率可分别达到99%、97%以上。

关键词: 破乳剂, 乳化液, 硫酸铝

Abstract:

Aluminum sulfate was used as a demulsifier to demulsify the lad-made emulsion of wire-drawing oil with different concentration. After demulsification，the COD，turbidity and pH value were measured，and the removal rate were calculated. Then，the demulsification effect of the aluminum sulfate alone and the composite demulsifier of aluminum sulfate-poly aluminum chloride were examined. The results show that the aluminum sulfate possesses the more stronger demulsification in several demulsifiers，the COD and turbidity in its treated water layer reached 70% and 60% respectively. However，the use of aluminum sulfate alone for the waste emulsion of wire-drawing oil of medium and high concentration from actual production showed poor performance，due to the emulsifying waste oil and water could not be layered. The composite demulsifier of aluminum sulfate and poly aluminum chloride，exhibited more effective demulsification on this waste. After stirring for 10 min，the removal rate of COD and turbidity of the medium concentration of waste emulsion reached 98% and 91% respectively，while 99% and 97% respectively for the waste of high concentration waste.

Key words: demulsifier, emulsion, aluminum sulfate

中图分类号: 

• X76