wet Scrubber vs Dry Scrubber differences

Wet Scrubbers vs Dry Scrubbers – Which is Better?   Frequently, wet scrubbers fail to achieve expected performance because the incoming hot gas stream evaporates the scrubbing fluid thus producing a “spray-dried” aerosol. In general, the potential for this...

Gas System Flow Rate Measurement System

Measuring the Flow Rate of a Gas System Perhaps the most fundamental parameter to be measured in gas handling systems is the flow rate. Determining the best method for measuring flow rate can be difficult. For low-pressure, non-toxic gas streams the pilot-tube...

Particulate Matter Isokinetic Sampling

Isokinetic Sampling for Particulate Matter Much time and money are spent by field investigators trying to ensure that particulate sampling is conducted isokinetically; but with today’s tighter emission standards and better control equipment it might be worthwhile to...

wet ESP Corona Quenching Effect

Wet Esp and the Corona Quenching Effect   Operators of wet electrostatic precipitators (wet ESPs) often notice that the secondary current and voltage readings tend to rise and fall with the particulate loading. This phenomenon is known as space charge corona...

Wet ESP Limits of Deutsch Equation

Wet Esp and the Limits of the Deutsch Equation Those involved in the design of electrostatic precipitators (wet or dry) are familiar with the Deutsch Equation and its variations: The Deutsch Equation Efficiency = 1 – EXP(-AW/Q) Where, A = collecting area W = migration...

Acid Gas Sampling Issues

Potential Issues with Sampling Acid Gases Current U.S. Environmental Protection Agency (https://www.epa.gov/) test methods for particulate concentration in stack gases can yield inaccurate results when hydrogen chloride (HCl) is present and the gas stream is at or...