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DOI	10.1016/j.cherd.2018.10.025
	Study of shear rate production in different geometric configurations of hydraulic reactors for ultra-flocculation
	del Rio, M.1; Cornejo, P.1; Betancourt, F.2; Concha, F.2; Rulyov, N.3
通讯作者	Cornejo, P.
来源期刊	CHEMICAL ENGINEERING RESEARCH & DESIGN
ISSN	0263-8762
EISSN	1744-3563
出版年	2019
卷号	141 页码:133-143
英文摘要	The efficient use of water has become an important issue in the mining industry, especially in countries where it is located in desert areas with low water reserves, as is the case in Chile. In addition, low ore grades necessitate efforts to recover the maximum amount of minerals in solid-liquid separation processes. Fine particle flocculation is a preliminary stage in various solid-liquid separation processes. The conventional flocculation process is done at low shear rates, ensuring that large flocs remain unbroken. However, it has been seen that the application of high shear rates at the beginning of the process for a short period of time significantly improves the solid removal efficiency, reducing the flocculant dosage and the duration and cost of the process, which is known as ultra-flocculation. This work presents a numerical CFD study of the hydrodynamic behavior in five hydraulic reactors for ultra flocculation, analyzing the shear rate curve over treatment time, dissipation efficiency and average shear rates. A new mean shear rate, which uses hydraulic variables to estimate the average agitation, is also defined. It was shown that the hydraulic shear rate can be useful for developing better hydraulic designs because it provides a second view, which, added to the shear rate curve over treatment time and effective shear rate, allows a more complete judgment of the performance of the designs. (C) 2018 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
英文关键词	Hydraulic reactors Ultra-flocculation Shear rate CFD
类型	Article
语种	英语
国家	Chile ; Ukraine
收录类别	SCI-E
WOS记录号	WOS:000456640800010
WOS关键词	TURBULENT ; DYNAMICS
WOS类目	Engineering, Chemical
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214866
作者单位	1.Univ Concepcion, Mech Engn Dept, Concepcion, Chile; 2.Univ Concepcion, Met Engn Dept, Concepcion, Chile; 3.Natl Acad Sci Ukraine, Inst Biocolloid Chem, Kiev, Ukraine
推荐引用方式 GB/T 7714	del Rio, M.,Cornejo, P.,Betancourt, F.,et al. Study of shear rate production in different geometric configurations of hydraulic reactors for ultra-flocculation[J],2019,141:133-143.
APA	del Rio, M.,Cornejo, P.,Betancourt, F.,Concha, F.,&Rulyov, N..(2019).Study of shear rate production in different geometric configurations of hydraulic reactors for ultra-flocculation.CHEMICAL ENGINEERING RESEARCH & DESIGN,141,133-143.
MLA	del Rio, M.,et al."Study of shear rate production in different geometric configurations of hydraulic reactors for ultra-flocculation".CHEMICAL ENGINEERING RESEARCH & DESIGN 141(2019):133-143.