Showing papers on "Spray tower published in 2022"

Wet Scrubber Design

Abstract: Wet scrubber systems have inherent advantages over other air pollution control devices as they have the ability to absorb gaseous pollutants, remove flammable and explosive dust particles safely. Though various types of wet scrubbers systems exist, spray towers based are preferred due to their simplicity in design, least energy consumption, cheaper to construct and maintain, less space requirements and operation with slight pressure drop, ability to handle a large volume of gases as well as engaged for the dual purpose of absorbing gaseous pollutants while removing particle contaminants. The mechanisms for the separation of the particle pollutant from the gas stream include impaction, interception, and diffusion, an inertia impaction mechanism is used in the spray tower wet scrubber system. This mechanism limits the size of particle contaminants control to Particle Matter (PM) size ≥ 5 μm, whereas PM10 and PM2.5 ≤ 5 μm pollutants from industrial sources constitute a great danger to human health. Consequently, several attempts have been made to improve the performance of spray tower wet scrubber for the pollutant control of PM10 and PM2.5 ≤ 5 μm. Two approaches for improving the design of wet scrubber systems, namely, similitude model design and computational fluid dynamics approaches have been discussed in this chapter. A pilot scrubber system for PM2.5 and PM10 control has been designed using PM data obtained from Ashaka cement industry in Gombe State, Nigeria. A Hydraulic Similitude approach has been employed to design a scaled model of the scrubber system. The airflow velocity and pressure fields within the scrubber system were simulated using ANSYS Fluent software to obtain optimum design of the system, improve efficiency, shorten experimental period, and avoid dead zone. Some simulated results are presented to justify the essence of the designed approaches.