| 甜水混凝除杂的净化效果 |
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| 引用本文： | 刘昊,康勇,王兵,鲁佳,韩强.甜水混凝除杂的净化效果[J].化工进展,2016,35(5):1509-1513. |
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| 作者姓名： | 刘昊 康勇 王兵 鲁佳 韩强 |
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| 作者单位： | 天津大学化工学院, 天津 300072 |
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| 摘 要： | 甜水是油脂水解制取甘油的粗产物,甜水除杂净化是甘油精制的重要环节。本文提出了混凝净化油脂水解甜水的新工艺,研究了相关因素对除杂净化效果的影响。得出当pH值调节阶段pH值为11.4、搅拌转速大于300r/min、搅拌时间为60min、混凝阶段的混凝剂用量为75mg/L、絮凝剂用量为20mg/L、絮凝转速为100r/min、絮凝时间为30min时,为最适宜的除杂净化操作条件参数,甜水混凝除杂的效果最佳。研究结果表明:采用该方法得到的净化甜水较传统工艺的皂化当量和浊度更小,沉渣易于分离,混凝过程中不破坏脂肪酸结构,可以回收再用。该方法在甜水除杂净化实际生产中具有较大的应用推广价值。
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| 关 键 词： | 甜水 杂质 净化 |
| 收稿时间： | 2015-10-15 |
Impurity removal from sweet water by coagulation/flocculation |
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| LIU Hao,KANG Yong,WANG Bing,LU Jia,HAN Qiang.Impurity removal from sweet water by coagulation/flocculation[J].Chemical Industry and Engineering Progress,2016,35(5):1509-1513. |
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| Authors: | LIU Hao KANG Yong WANG Bing LU Jia HAN Qiang |
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| Affiliation: | School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | Sweet water is the primary product of glycerol produced from oil and fat hydrolysis. The purification operation of sweet water is one of the key steps in glycerin refining. A new method of coagulation/flocculation for purification of sweet water was proposed, and the effects of various operation factors was investigated. The results showed that the best operation conditions were pH value of 11.4, time of 60min, and stirring speed over 300r/min during pH adjustment phase and coagulant dosage of 75mg/L, flocculent dosage of 20mg/L, stirring speed of 100r/min and flocculation time of 30min during flocculation phase. Compared with the traditional process, the new purification method can achieve lower saponification equivalent and turbidity of the supernant from the treated sweet water. The flocs sediment could be separated easily and recycled thoroughly. Therefore, this purification method is much valuable for practical impurities removal from sweet water. |
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| Keywords: | sweet water impurity purification |
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