Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Analysis of the Power for a Decanter-Type Centrifuge (I) - Sludge-Removal Power -

Decanter형 원심분리기의 동력 계산 (I) - 슬러지 제거동력 -

  • 서용권 (동아대학교 기계산업시스템공학부)
  • Published : 2003.07.01
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Abstract

In general, the electric motor for driving the centrifuge of Decanter type is selected based on the power(starting power) necessary to start the bowl and the screw shaft. However the operation cost of the machine is dependent on the power needed at a steadily operating condition, including the power against the bearing friction and that for the sludge removal. In this paper, the formulation for the sludge-removal power is presented. Sample calculation for a specific design shows that the sludge-removal power is increased with the friction coefficient. It also reveals that the power is mainly dependent on the length of the screw blade rather than the beach angle. Further it is shown that the power increases in square of the rotational speed of the machine.

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References

  1. Records, A. and Sutherland, K., 2001, Decanter Centrifuge Handbook, Elsevier Advanced Technology
  2. Leung, W.W.-F. and Shapiro, A.H., 1999, 'Dewatering of Finite-Particle Slurries Using a Compound-Beach Decanter with Cake-Flow Control,' Filtration & Separation, december, 1999, pp. 49-56 https://doi.org/10.1016/S0015-1882(99)90087-3
  3. Leung, W.W-F., Shapiro, A.H. and Yarnell, R., 1999, 'Improvements in the Clarification of Finite-Particle Slurries Using Decanter Centrifuges,' Filtration & Separation, November, 1999, pp. 32-37 https://doi.org/10.1016/S0015-1882(99)80213-4
  4. Corner-Walker, N. and Laval, A., 2000, 'The Dry Solids Decanter Centrifuge: Capacity Scaling,' Filtration & Separation, May, 2000, pp. 28-32 https://doi.org/10.1016/S0015-1882(00)88850-3