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Wet Gas
Scrubbers
General
Overview
Fowlerex Technologies market a wide range of scrubbers. Each scrubber is slightly different from the next, however, the basic operating principle is the same. Methods of mixing the air and liquid define the effectiveness, efficiency and suitability of the scrubber in certain applications.
Such selection allows for maximum effectiveness at the lowest cost.
The basic principle behind wet gas scrubbing revolves around adiabatic saturation. The air or gas stream is mixed with a liquid medium. A scrubber may be considered in its simplest form as a rain tower in which water droplets merely fall by gravity through a gas. This type of scrubber is not considered effective as a gas cleaning device where removal of finely divided dust and fume particles is desired.
From this simplest form of rain tower, improvements in scrubbing are accomplished by the use of baffles and other restrictions, to provide a tortuous path for the dust and gas. Such arrangements are the centrifugal types, impingement types, packed towers, film towers, wet filters, scrubbers with rotating elements, the venturi and the Doyle together with series or tandem collection systems.
The scrubber is effective for treatment of wet and dry gases. Pre-conditioning of inlet gases usually is not required. However, for certain applications where temperatures are extremely high or where the particle fineness of the dust presents a difficult removal problem, the inlet gases may be
pre-conditioned by water sprays, steam or ionization by electrical discharge.
During the development of the Fowlerex Technologies scrubber design, many tests were performed and a great deal of empirical information was gathered and applied to the
mass-transfer mathematical relationships applicable to its operations
Wet scrubbers are normally categorized on the basis of pressure drop (the difference in pressure between two points in a system, caused by resistance to flow, and measured in kilopascals.
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Low energy scrubbers (between 0.1 to 0.5 kPa)
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Low medium energy scrubbers (between 0.5 kPa to 1.5 kPa)
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Medium to high energy scrubbers (between 1.5 to 4 kPa )
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High energy scrubbers (greater than 4 kPa)
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