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Weir Correction Factor Bolles

0/(Lw]"= (liquid lood, gal. mir.)/{weir length, ft,)4'5

FIG. 14-38 Correction for effective weir length. To convert gallons per minute to cubic meters per second, multiply by 6.309 x 10-5; to convert feet to meters, multiply by 0.3048. [Bolles, Pet. Refiner, 25, 613 (1946).]

0/(Lw]"= (liquid lood, gal. mir.)/{weir length, ft,)4'5

FIG. 14-38 Correction for effective weir length. To convert gallons per minute to cubic meters per second, multiply by 6.309 x 10-5; to convert feet to meters, multiply by 0.3048. [Bolles, Pet. Refiner, 25, 613 (1946).]

where

Equations (14-113) and (14-114) use English units: W is the weep rate, gpm; Ah is the hole area, ft2; uh is the hole velocity, ft/s; and hc is the clear liquid height, in. Colwell's [Ind. Eng. Chem. Proc. Des. Dev. 20(2), 298 (1981)] method below has been recommended for obtaining the clear liquid height hc in Eq. (14-114).

where ty is given by Eq. (14-119) and Cd is given by Eq. (14-116)

where hf is given by Eq. (14-122). The froth density (/ is calculated from n = 12.6FrĀ°. ty =

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