| 主权项 |
1. A liquid-liquid contacting arrangement, adapted to be installed within a liquid-liquid extraction column, the contacting arrangement comprising:
(a) a plurality of pairs of disk and doughnut plates, said pairs stacked in a generally longitudinal stack, said stack being generally perpendicular to broad faces of said disk and doughnut plates, each pair of said disk and doughnut pairs including:
(i) a disk plate; and(ii) a doughnut plate, disposed beneath said disk plate; said disk plate having a first liquid-liquid contacting surface along a perimeter of said disk plate; said doughnut plate having a second liquid-liquid contacting surface along an internal perimeter of said doughnut plate; and (b) a securing arrangement adapted to
affix said disk plate and said doughnut plate of said each pair in a first spaced-apart relationship; and(ii) affix, in a second spaced-apart relationship, said disk and doughnut pairs with respect to one another; at least a portion of at least one of said first and second contacting surfaces having teeth disposed in a proximate position to said first and second contacting surfaces, said proximate position defined by:
Lcs-doughnut=K·(Dext−Dint), for said doughnut plates; andLcs-disk=K·(Ddisk), for said disk plates,wherein:
Lcs-doughnut is a maximum distance of said teeth on each particular doughnut plate, from said contacting surface of said particular doughnut plate; Lcs-disk is a maximum distance of said teeth on each particular disk plate, from said contacting surface of said particular disk plate; Dext is an outer diameter of said doughnut plate, excluding any protrusions of said teeth; Dint is an inner diameter of said doughnut plate, excluding any protrusions of said teeth; Ddisk is a diameter of said disk plate, excluding any protrusions of said teeth; said teeth having an average length of at least 2 mm; K is a coefficient, K being at most 0.05;and wherein a length ratio of a perimeter of said teeth to said perimeter, excluding said teeth, is at least 2.0. |
