Meso-mixing effects on demulsification in froth treatment: mechanisms and modeling

泡沫处理中介观混合对破乳的影响：机制和模型

基本信息

批准号：
485319-2015
负责人：
Kresta, Suzanne
金额：
$ 6.34万
依托单位：
University of Alberta
依托单位国家：
加拿大
项目类别：
Collaborative Research and Development Grants
财政年份：
2018
资助国家：
加拿大
起止时间：
2018-01-01 至 2019-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=656000
关键词：
Meso mixing effects demulsification froth

项目摘要

All of Chemical Engineering can be broken into three basic steps: mixing, reaction, and separations. While reaction and separations have been extensively studied for centuries, the (technical) mixing literature only begins in the 1950's. For decades, we have taught students that processes are "well mixed" - but a technical and comprehensive definition of what we mean by well mixed only appeared in 2009 (Kukukova et al.)****Mixing is frequently simple or ideal, but when it appears as a problem it is often elusive - appearing in one set of experiments and disappearing in other apparently similar work. There are two reasons for this: first, well defined mixing test cells have only recently been developed, and second, mixing is most frequently a competing rate process - it has strong interactions with other variables and cannot be considered in isolation.****In this proposal, the initial stages of mixing additive into diluted bitumen froth are to be explored. In this process, if the additive is injected at a high concentration with poor mixing, clean up of the froth before processing is very difficult. If this additive is prediluted and mixed vigorously at the point of injection, the chemical use can be cut in half while achieving the same separation. This is a classical mesomixing problem, indicating that high local concentrations at the feed point are changing the chemical action taken by the demulsifier additive.****New experimental tools allow us to look into the feed plume to see what is happening and determine the fate of the demulsifier. This is the first time in-situ measurements will be possible in real time.**

所有化学工程都可以分为三个基本步骤：混合，反应和分离。尽管已经对反应和分离进行了广泛的研究几个世纪，但（技术）混合文献仅在1950年代开始。几十年来，我们一直教学生“混合在一起”的过程 - 但是，我们对我们的含义的技术和全面定义仅出现在2009年（Kukukukova等人。）****混合通常是简单或理想的，但是当它作为问题似乎是一个难以捉摸的实验 - 出现在一组实验中，并且在另一组相似的工作中消失了。造成这种情况的原因有两个：首先才开发出明确定义的混合测试单元，其次，混合最常是竞争速率过程 - 它与其他变量具有很强的相互作用，不能孤立地考虑。在此过程中，如果将添加剂注入高浓度，混合量较差，则在处理前清理泡沫非常困难。如果这种添加剂在注射点占主导地位并剧烈混合，则可以将化学用途切成两半，同时获得相同的分离。这是一个经典的中小型问题，表明进料点的局部浓度很高正在改变拆卸器添加剂采取的化学作用。****新的实验工具使我们能够研究进料羽流，以查看发生了什么并确定拆除器的命运。这是第一次实时测量。**