Calculate the overall collection efficiency of a Venturi scrubber that cleans a fly ash-laden gasstream, given the liquid-to-gas ratio, throat velocity, and particle size distribution (USEPA-84/09,p. 79).
Given
Liquid-to-gas ratio = 8.5 gal/1000 ft3
Throat velocity = 227 ft/sec
Particle density of fly ash = 43.7 lb/ft3
Gas viscosity = 1.5 × 10–5 lb/ft-sec
The particle size distribution data are given in Table 10.1. Use Johnstone’s equation with a k value of 0.2 to calculate the collection efficiency. Ignore the Cunningham correction factor effect.