Peculiarities of Application of Equation for Moisture-Filling of Sediments with Capillary Fringe Filtrate in Centrifuges with Due Account of Gas Pressure in Them.

Autor: Zhukov, V. G., Chesnokov, V. M., Lukin, N. D.
Předmět:
Zdroj: Chemical & Petroleum Engineering; May2023, Vol. 59 Issue 1/2, p3-11, 9p
Abstrakt: The research was aimed at deriving an equation for calculating the degree of moisture filling of pore spaces of centrifuged sediments with capillary fringe filtrate. The previously derived analytical equation does not take the gas pressure in the centrifuge into account. To take account of the gas pressure, a modification of the equation for calculating the limiting pore diameter determined from the limiting force equilibrium between the fringe capillary forces and the sum of inertial centrifugal forces in combination with forces of gas pressure is proposed. In the example of calculation, cases of formation of a two-layer capillary fringe (with a base layer saturated with the filtrate and an unsaturated fringe layer) and a single-layer capillary fringe were considered. The calculation results showed agreement between the calculated moisture content curves and the experimental data. The obtained data are required for purposeful changes in the parameters of mechanical drying for reducing or increasing the degree of moisture filling of the sediment. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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