Using simulated experimental setup for flue gas desulphurization with limestone-gypsum

it was studied and analyzed that the relationship existed between properties of fine particles in flue gas formed in desulphurization process and particle size distribution

concentration

morphology

and elements composition of the limestone-gypsum slurry. The effects of flue gas component and desulphurization operation parameters on the fine particle emission were also experimentally investigated. The results show that large numbers of submicron particles are formed during the desulphurization process and their properties are close related to crystal properties of limestone-gypsum in desulphurization slurry. The desulphurization operation parameters such as empty column gas velocity and liquid-gas ratio have great influence on the quantity of slurry drops carried by flue gas out of the scrubber. The evaporation and entrainment of desulphurization slurry is the main source of fine particles formed during desulphurization and their formation can be reduced by the prevention of fine crystal formation in desulphurization slurry and operation parameter optimization.