The invention discloses a pretreatment process for waste oil, which comprises the steps of dissolving waste oil, adding decomposition agent, reaction, sedimentation, impurity removal, electrolysis treatment, etc.. The invention has the advantages that the pretreatment process in the waste oil is added in the specific composition and content of decomposition agent makes the waste grease most fat soluble gum into water-soluble gum, swelling, aggregation, settlement and discharge particles under the action of water in the electrolyte, effectively remove the waste grease all kinds of colloid, unsaponifiable matter, is a good way to improve the quality of the oil after refining, biodiesel for subsequent esterification and transesterification process provides good quality raw materials, greatly reduce the esterification process coking, carbon degree.
【技术实现步骤摘要】
【技术保护点】
1.一种废弃油脂预处理工艺,其特征在于该工艺包括以下步骤:(1)将废弃油脂加入反应装置,搅拌状态下逐渐升温至80℃~98℃,然后加入为废弃油脂总重量20%~40%的水;(2)加入分解剂,继续升温至120℃~140℃,保持温度及压力稳定,待反应物料酸值升至140~160mgKOH/g时,停止加热;(3)温度下降至95℃时,关闭搅拌,反应物料静置后,将反应装置下部水相排净,并继续排出底部胶质类物质直至有油相排出为止;(4)开启搅拌,加入为废弃油脂总重量5%~20%的水,升温并维持温度在60℃~90℃,加入电解质,搅拌后静置,然后将反应装置下部水相排净,并继续排出底部胶质类物质直至有油相排出为止。
【技术特征摘要】
【专利技术属性】
技术研发人员:陈恒顺,严小建,张宇,金健,沈建平,申圣良,
申请(专利权)人:江苏恒顺达生物能源有限公司,
类型:发明
国别省市:32
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