Specifying Venturi Scrubber Throat Length for Effective Particle Capture at Minimum Pressure Loss Penalty

A simplified equation for specifying the optimum minimum length for commercial venturi scrubber throats is presented in this paper. This theoretical correlation is derived using an optimum velocity ratio (velocity of collector droplet at end of venturi throat to velocity of gas in throat) and is a function of throat gas velocity and liquid to gas ratio. This velocity ratio establishes the minimum throat length and is based on available literature data. Predicted venturi scrubber particle collection for throats specified by this procedure compare favorably with reported commercial venturi collection efficiencies and with modeled venturi efficiencies over the practical range of venturi scrubber operation.