Theoretical Study of Nonuniform Droplets Concentration Distribution on Venturi Scrubber Performance

Estimating maximum removal efficiency in Venturi scrubbers

“…Hence, it is important for the theoretical model to predict the flux distribution as closely as possible within the throat. Recent models (Viswanathan, 1997b: Fathikalajahi et al, 1996 consider most of these conditions but at the expense of large computational requirements. This work is to develop a simplified model that factors jet penetration length, maldistribution of liquid drops, initial liquid momenta, drop movement in the axial direction by convection and in the lateral direction solely due to convective diffusion, nonuniform inlet dust size distribution, dust motion in axial direction through convective mechanism and in the lateral direction through convective diffusion mechanism, and particulate matter collection by droplets through inertial impaction.…”

“…The principal collection mechanism in a Venturi scrubber is inertial impaction. The single drop collection efficiency q can be calculated from (Calvert et al, 1972;Taheri and Sheih, 1975;Fathikalajahi et al, 1996) (7)…”

“…The principal limitations of all of these design approaches were the assumption of the existence of only a homogeneous core with uniform flux across the scrubber and the absence of film flow on the wall. Visual observations and experimentation have indicated the cxistcnce of an annular two-phase, two component flow with a thin liquid layer on the walls and a high velocity gas stream carrying the droplets in the core (Azzo- Several important mathematical models to predict particle collection efficiency in a Venturi scrubber (Azzopardi and Govan, 1984;Behie and Beeckmans, 1973;Boll, 1973;Calvert, 1970;Ekman and Johnstone, 1951;Fathikalajahi et al, 1996;Peters, 1981, 1982;Viswanathan et al, 1984) use one of these approaches. Most of the earlier design approaches are based on the analytical model developed by Boll (19731, considering drop motion and particle impaction on drops.…”

Droplet dispersion angle measurements on a Pease-Antony Venturi scrubber

“…Several models based on computational fluid dynamics are available to calculate droplet dispersion in Venturi scrubbers with a transversal injection (Taheri and Sheih, 1975;Fathikalajahi et al, 1995;Fathikalajahi et al, 1996;Viswanathan et al, 2005;Gonçalves et al, 2003a). Yoon (2005) used a Lagrangian simulation to study the dispersion and size distribution of droplets emerging from a jet that is parallel to the gas stream.…”

Droplet size in a rectangular Venturi scrubber

“…The convenience of using a single mean diameter to represent the wide size distribution that occurs in Venturi scrubbers has been criticized by Bayvel (1982) and Fathikalajahi et al (1996). Bayvel (1982) showed that a calculated overall collection efficiency could be very different if the size distribution instead of a single mean diameter were used.…”