Solid/Liquid Separation: Equipment Selection and Process Design

Appendix B: Correlations for Cake Washing and Gas Deliquoring

Details of the washing and gas deliquoring correlations shown here are given in Wakeman and Tarleton (2005a) while the principles are further described in Wakeman (1972, 1973, 1976a, 1976b, 1976c, 1979a, 1979b, 1979c, 1980, 1984a, 1984b, 1986a) and Wakeman and Vince (1986a, 1986b). The correlations are equivalent to Figures 6.7 6.9 and can be used interchangeably for the calculation procedures and simulations described in Chapters 6 and 7.

Displacement Washing

The curvefit coefficients in Table B.1 represent the family of curves for dimensionless concentration of solute in the washings ( ) vs. wash ratio ( W).

Table B.1: Curvefit coefficients for W vs. relationships at various dispersion numbers for displacement cake washing.

W vs. relations and regions of validity

D n = 0.01

= 1

0 ? W < 0.1

= 0.0524 W ?0.5311

W ? 0.1

D n = 0.05

= 1

0 ? W < 0.1

= 0.1036 W ?0.5848

W ? 0.1

D n = 0.1

= 1

0 ? W < 0.1

= 0.1364 W ?0.6037

W ? 0.1

D n = 0.5

= 1

0 ? W < 0.1

= 1.0754 ? 2.609 W + 3.5187 W 2 ? 2.3065 W 3 ? 0.5687 W 4

0.1 ? W < 1.6

= 0.2481 W ?0.9950

W ? 1.6

D

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