spray tower

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spray tower

[′sprā ‚tau̇·ər]
(chemical engineering)
A vertical column, at the top of which is a liquid spray device; used to contact liquids with gas streams for absorption, humidification, or drying.
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Indeed, many types of scrubbers do exist on the market ranging from spray towers over packed columns and venturis to even dry scrubbers.
Steel piping systems are widely used at coal-fired power plants for a variety of purposes, including the conveyance of coal ash slurry to nearby settling ponds, the transfer of limestone slurry to absorber spray towers for removal of sulfur dioxide (SO2) and hydrogen chloride (HCl) from flue gases, and for transporting away the calcium sulfate by-product of the flue gas desulfurization process.
This waste material produced by the process is then pumped out f rom the bottom of the spray towers through steel pipe for further treatment for use in commercially viable by-products such as gypsum board and cement.