Collectors MCC

A hydrochloric acid mist in air at 25°C is to be collected in a gravity settler. You are requested to calculate the smallest mist droplet (spherical in shape) that will always be collected by the settler. Assume the acid concentration to be uniform through the inlet cross section of the unit and Stokes law applies. Operating data and information on the gravity settler are given below. 

Dimensions of gravity settler = 30 ft wide, 20 ft high, 50 ft long 

Gravity settlers can be designed to ensure capture of some minimum particle size. If Stokes law applies, one can show that this minimum particle size is given by 

For the problem at hand, first determine the density of the acid mist  

Calculate the minimum particle diameter both in feet and microns assuming Stokes s law applies  

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