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Development of a high-performance cake-less continuous filtration system

机译:开发高性能的无饼式连续过滤系统

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摘要

A new cake-less continuous filtration system with a rotating disk filter and slurry prepared in a well-dispersed state is discussed in this paper. It is expected that the new system can concentrate a feed suspension much more than traditional filtration systems and that the concentrate can be discharged by the filtration pressure without a scraping device. We tried to filter some difficult to filter materials such as sericite, hydrolyzed cellulose, pulp wastewater and algal suspension. Concentrated slurries of sericite and hydrolyzed cellulose were discharged at the 35 vol% and 12mass%, respectively. The algal suspension and the pulp wastewater were concentrated up to 8 times more than the concentration of feed suspensions. The concentrates of every sample retained fluidity and flowed out of the new system by way of the filtration pressure. In this system, it was shown that the filtration flux increased with the rotation speed. At lower rotation speeds, the filtration flux was independent of pressure. Conversely at higher rotation speeds, the filtration flux increased along with the pressure. This dependency was clearer in the case of the large disk than when the small disk was used. We also proposed a model for a sweeping mechanism in this system which is explained in the above results. (c) 2008 Elsevier Ltd. All rights reserved.
机译:本文讨论了一种新型的无饼连续过滤系统,该系统具有旋转盘式过滤器和以良好分散状态制备的浆料。预计新系统可以比传统的过滤系统浓缩更多的饲料悬浮液,并且可以在没有刮擦装置的情况下通过过滤压力将浓缩物排出。我们试图过滤一些难以过滤的材料,例如绢云母,水解纤维素,纸浆废水和藻类悬浮液。绢云母和水解纤维素的浓浆分别以35体积%和12质量%排出。藻类悬浮液和纸浆废水的浓缩比进料悬浮液的浓度高8倍。每个样品的浓缩液保持流动性,并通过过滤压力从新系统中流出。在该系统中,显示出过滤通量随着旋转速度而增加。在较低的转速下,过滤通量与压力无关。相反,在较高转速下,过滤通量随压力而增加。对于大磁盘而言,这种依赖性比使用小磁盘时更为清晰。我们还提出了该系统中的清扫机构模型,以上结果对此进行了解释。 (c)2008 Elsevier Ltd.保留所有权利。

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