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1. 发明授权

US06746599B2 Staged settling process for removing water and solids from oils and extraction froth 失效
标题翻译：从油和提取泡沫中去除水和固体的分阶段沉降过程
公开(公告)号：US06746599B2
公开(公告)日：2004-06-08
申请号：US09877260
申请日：2001-06-11
申请人： George Cymerman , Pat Dougan , Tom Tran , Jim Lorenz , Corey Mayr
发明人： George Cymerman , Pat Dougan , Tom Tran , Jim Lorenz , Corey Mayr
IPC分类号： C10G104
CPC分类号： C10G1/047 , C10G1/045
摘要： Diluent-diluted bitumen froth containing bitumen and naphtha diluent, hydrocarbons, water, sand and fines (collectively “dilfroth”) is fed into a vapor-tight gravity settler (‘splitter’) and temporarily retained to produce a bottom layer of tails comprising sand and middlings, a rag layer of discrete three-dimensional structures, each comprising hydrocarbons contained in a skin of fines, and a top layer of hydrocarbons containing small droplets of water and fines (‘raw dilbit’). The flux in the splitter is less than 6 m3/h of dilfroth fed per m2 of horizontal cross-sectional rag area. The in-coming dilfroth is fed directly into the splitter middlings. Demulsifier is added to the overflow stream of raw dilbit and the mixture is subjected to prolonged settling in a vapor-tight polisher tank, to produce polished dilbit containing less than 1.0 wt. % water and 0.3 wt. % solids. The splitter underflow tails, containing less than 15 wt. % bitumen, is mixed with additional diluent to raise the diluent/bitumen ratio to 4:1 to 10:1 and is gravity settled in a vapor-tight scrubber. Scrubber overflow, mostly diluent containing residual bitumen stripped from the tails, is recycled to the splitter. In concept, the sand is first separated from the bitumen in the stripper. The substantially sand-free bitumen can then feasibly be treated with chemical demulsifier and subjected to prolonged settling in the polisher to reduce water and fines contents to low levels. Bitumen lost with the splitter tails is recovered in the scrubber using a high concentration of diluent. The scrubber overflow of bitumen and diluent is recycled to the stripper to conserve diluent.
摘要翻译：含有沥青和石脑油稀释剂，碳氢化合物，水，沙子和细粉（统称为“稀释剂”）的稀释稀释的沥青泡沫进料到气密重力沉降器（“分离器”）中并暂时保留以产生包含砂的尾部底层和中间物，分散的三维结构的碎布层，每层包含细粉表皮中含有的碳氢化合物，以及含有小水滴和细粉（“未稀释”）的顶层烃。分流器中的通量小于每m 2水平横截面抹布面积进给的稀释度小于6m 3 / h。进来的dilfroth直接进入分流器中。将破乳剂加入到原料稀释液的溢流中，并将混合物在气密的抛光槽中长时间沉降，以产生含有小于1.0wt。％水和0.3wt。固体％。分流器下溢尾部含有少于15wt。％的沥青与另外的稀释剂混合，将稀释剂/沥青比提高到4：1至10：1，并将其重力沉降在气密的洗涤器中。洗涤剂溢出，主要是从尾部剥离的含有残留沥青的稀释剂，被再循环到分离器。在概念上，沙子首先与汽提塔中的沥青分离。然后可以用化学破乳剂可靠地处理基本上无砂的沥青，并在抛光机中经过长时间的沉降，以减少水分并将内容物细粉至低水平。使用高浓度的稀释剂在洗涤器中回收分配器尾部损失的沥青。沥青和稀释剂的洗涤器溢流被再循环到汽提塔中以保存稀释剂。

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