0613e34637 Typical countercurrent-flow spray tower. Gilbert, J. The main advantage of spray towers over other scrubbers is their completely open design; they have no internal parts except for the spray nozzles. Northbrook, IL: McIlvaine Company. Spray towers have been used effectively to remove large particles and highly soluble gases. .. The collection efficiency for small particles is correspondingly lower than in more energy-intensive devices.
Spray towers are inexpensive control devices primarily used for gas conditioning (cooling or humidifying) or for first-stage particle or gas removal. In crosscurrent-flow spray towers, also called horizontal-spray scrubbers, the gas and liquid flow in directions perpendicular to each other. Operating characteristics of spray towers are presented in the following table.[3]. Spray nozzle . ^ *US EPA Air Pollution Training Institute developed in collaboration with North Carolina State University, College of Engineering (NCSU) . Air Pollution Control Technology. 1977. The pressure drops across the towers are very low usually less than 2.5cm (1.0in) of water; thus, the scrubber operating costs are relatively low. A spray tower (or spray column or spray chamber) is gas-liquid contactor used to achieve the mass and heat transfer between a continuous gas phase (that can contain dispersed solid particles) and a dispersed liquid phase. This flow of inlet gas and liquid in the opposite direction is called countercurrent flow.
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