Calculation of Moisture Content of Sediment Along the Radius in a Filtering Centrifuge After Its Mechanical Drying.

The problem of calculating the moisture content of pore space of sediment after its mechanical drying in a centrifuge with a peripheral filtering surface is studied. An analytical equation was derived along the radius of moisture filling of the sediment by filtrate of the capillary fringe, taking account of lognormal distribution of pore sizes. The proportion of moisture imported into the pores by the bound filtrate is determined. The presence of a basal layer of the capillary fringe is illustrated. The possibility of limiting determination of the smallest pore diameter toward larger size for constructing histograms and calculating the moisture content of the sediment is confirmed. The agreement of the results with the known experimental data received for suspensions of chemical and oil refining industries in filtering centrifuges is confirmed by an example of calculation. The main variable design and technological parameters for calculations based on effective mechanical drying of sediment in the filtering centrifuge rotor are the radius of the circumference of its filtering surface, the angular velocity, and the maximum size of pores in the sediment. [ABSTRACT FROM AUTHOR]