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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 5    May 2017

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Dynamic simulation of pilot thickener operation using phenomenological model with results validation for continuous and discontinuous tests
Rahimi Mehdi1, Unesi Majid2, Rezai Bahram1, Abdollahzadeh Ali1, 3

1. Department of Mining and Metallurgical Engineering, Amirkabir University of Technology,
Tehran 15875-4413, Iran;
2. Young Researchers and Elites Club, Science and Research Branch, Islamic Azad University,
Tehran 1477893855, Iran;
3. Department of Mining Engineering, University of Kashan, Kashan 8731753153, Iran

Abstract:The phenomenological theory of sedimentation-thickening processes predicts the settling behavior of a flocculated suspension in dependence of two functions, the batch flux density function and the effective solid stress. These functions were determined using batch settling tests. The governing equations for sedimentation were then solved numerically for these functions and the predictions were compared to the experimental results from pilot scale thickener tests. Firstly, the continuous tests were performed in the plexiglass pilot thickener at different feed flow rates and discharge rates and the solid volume fraction of discharge, the bed height and the time were recorded for each condition. These tests were also simulated and it was observed that there is a good agreement between the results of continuous tests and the results of dynamic simulation. Secondly, the discontinuous tests were performed in the plexiglass pilot thickener at different feed flow rates with a discharge rate of zero. The bed formation rate was determined for each condition. These tests were also simulated and it was observed that there is a good agreement between the results of discontinuous tests and the results of simulation.

 

Key words: dynamic simulation; dewatering; thickener behavior; pilot thickener; validation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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