Calculation of the compression zone height in continuous thickeners
作者:
R. Font,
期刊:
AIChE Journal
(WILEY Available online 1990)
卷期:
Volume 36,
issue 1
页码: 3-12
ISSN:0001-1541
年代: 1990
DOI:10.1002/aic.690360103
出版商: American Institute of Chemical Engineers
数据来源: WILEY
摘要:
AbstractA method to calculate the compression zone height in continuous thickeners is presented. With this method, it is necessary to know the variations of the pulp‐supernatant interface and the sediment height vs. time in a batch test. This method is discussed considering the following aspects: relationship between the settling rate of solids and their concentration in the settling zone; and the compression of solids due to the squeeze transmitted by the upper layers—unbuoyed weight of particles minus force of friction due to the Darcian flow. When the variation of the sediment height vs. time becomes linear, it is possible to calculate the maximum solids concentration which can be reached by sedimentation. The change of the solids matrix permeability and its influence on the method proposed are also analy
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