Combination of cooling and dust collection systems in a sulfuric acid plant: A cooling coil and a rotary drum with sprays

The particularity of the roasting pyrrhotite process is the production of both dioxide sulfur and a hematite-rich waste fe2o3 as a secondary product,known as roasted pyrrotite ash. because of its high temperature 270°c and its ultrafine particles,the roasting processing generates excessive dust which could harm not only worker's health but also environment. the dust collection system in place in the case study plant (morocco) consisting of cyclones and esp precipitators do not collect all of this dust. to mitigate the spreading of dust all over the plant,an additional system to settle the dust is needed. in this work,we propose a combination of cooling and dust collecting systems at the same time,that ensures a decrease of high temperature,an obstacle while spraying,and then settle down airborne hematite. so,a cooling coil is immersed into the bed of fine particles of the conveyor moving towards the storage hall. after being cooled,the challenge is the capture of dust in a rotating drum provided with sprays. © 2017,university of mohammed premier oujda morocco.