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WET AND DRY SCRUBBERS FOR EMISSION CONTROL
Citation:
Lee*, C C. AND G L. Huffman*. WET AND DRY SCRUBBERS FOR EMISSION CONTROL. Chapter 3.3, C.C. Lee (ed.), Handbook of Environmental Engineering Calculations. McGraw-Hill Companies, New York, NY, , 3,223-3,297, (2000).
Description:
Generally speaking, absorption equipment includes two major categories: Wet adsorption scrubbers (or wet scrubbers); Dry absorption scrubbers (or dry scrubbers).
Wet scrubbers: As the name implies, wet scrubbers (also known as wet collectors) are devices which use a liquid for the removal of source emissions from effluent gas streams (EPA-84/03,p.1-1: EPA-81/10, p.9-1). These air pollution control devices can remove both particulate matter and gaseous pollutants.
The dirty exhaust streams is brought into contact with the liquid by spraying it into the liquid by forcing it through a pool or liquid; or by some other control device depend on the polutant (gas or particle) to be controlled. The types of wet scrubber equipment are shown in Table 3.1.
Particulate matter removal: When wet scrubbers are used for removing particles, the particles are captured by and incorporated into liquid droplets. The droplet must then be separated from the clean exhaust stream. Wet collectors, baghouses, or electrostatic precipitators (ESP's) can be used when collecting small particles at a high efficiency.