EXPERIMENTAL AND THEORETICAL INVESTIGATIONS OF LIQUID DISTRIBUTION, JET PENETRATION, EFFICIENCY AND PRESSURE DROP IN A PEASE-ANTHONY VENTURI SCRUBBER.

摘要

Experimental and theoretical investigations were carried out in a pilot plant size, Pease-Anthony Venturi scrubber for liquid to gas ratios ranging between 3 and 14 U.S. Gal of H(,2)O/1000 scf of air and throat gas Velocities of 150, 200 and 250 ft/s in order to obtain fundamental data on: (i) jet penetration lengths; (ii) liquid distribution; (iii) energy losses. Maximum jet centre-line penetrations were measured for nozzle diameters varying from 0.055 to 0.152 inches and correlated according to: (l**/d(,o)) = 0.11 ((rho)(,j) V(,j)/(rho)(,G) V(,g,th)). This function is related to film flow on the wall and maldistributions in the core. Local liquid core flux was determined using a Pitot-probe assembly. Porous sintered metal plates facilitated film flow measurements. Transitions from a significant central void to maximum flux ratios were found to occur with increasing liquid to gas ratios. The initial transverse momentum of the injected liquid was found to be an important parameter in determining maldistribution in the throat. Film flow measurements indicated that a higher proportion of injected liquid flows on the walls for low L/G ratios than for high L/G ratios. The fraction of the injected liquid flowing on the wall was related to a new dimensionless group, Ld(,o)/GR(,o), formulated from the jet penetration correlation. This relationship not only provides a means of estimating film flow rates but also facilitates liquid manifold design. A two-dimensional particulate collection model was developed to account for four different drop sizes predicted from the Ingebo and Foster correlation, initial liquid momenta, drag forces and turbulent diffusion. The transport equations for the drops and the particulate matter were solved using a Particle-in-Cell technique. Theoretical predictions of droplet fluxes were found to be highly dependent on the inverse Peclet number. Validation of the particulate collection model with the Brink and Contant data showed better agreement than that obtained with one-dimensional approaches utilizing a single drop size with uniform distribution over the flow area. It was found that no improvement in particulate collection efficiency was obtained whe the liquid to gas ratio exceeded about 10 U.S. Gal of H(,2)O/1000 scf of air at constant throat gas velocities. . . . (Authoru27s abstract exceeds stipulated maximum length. Discontinued here with permission of author.) UMIDept. of Chemistry and Biochemistry. Paper copy at Leddy Library: Theses u26 Major Papers - Basement, West Bldg. / Call Number: Thesis1983 .V578. Source: Dissertation Abstracts International, Volume: 44-10, Section: B, page: 3148. Thesis (Ph.D.)--University of Windsor (Canada), 1983.