A numerical study on the fluid flow and thermal characteristics inside the scrubber with water injection

Abstract

New technologies have been adopted by the marine industry to control the air emission from ship. Wet scrubbers have found widespread use in cleaning contaminated gas streams by the application of scrubbing of marine engine exhaust gases by spraying sea-water and thus develop their ability to remove particulates like SO X for pollution free environment. In real case problems, to control the emission of SO X in scrubber, the temperature of the flue gases should be dropped down by spraying sea-water droplets which brings down the lifetime of harmful pollutants. In order to examine the flow characteristics inside the scrubber, the computer simulation methodology is carried out in this paper with the boundary conditions of hot air at ideal gas state and water droplets injection using lagrangian method. During the impact of injecting water droplets over the hot air, the nature invites evaporation of hot air which is the obvious benefit of scrubber in diminishing the domain temperature. After the numerical analysis, if the model is observed with reasonable reduction in domain temperature, the optimum scrubber design can be elected for pollutant emission control in real case problems. From the assessment of possible impacts of pollutants from marine industry, the temperature of the system are in need of investigation facilitating the evaporation rate of water droplets and the computation of droplets concentration over the entire domain to bring out the competent modeling. The numerical analysis using CFD facilitates in understanding the problem better over its entire operating envelope.

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