A process and a plant for spray drying with recirculation loop from spray dryer

摘要

In a spray drying process utilizing a spray dryer having internal gas filters and an internal fluidized bed and comprising a treatment of the product outside the spray drying chamber, which treatment produces a particle-loaded gas stream, said particle-loaded gas stream is introduced into the spraying chamber. The stream passes, together with the spent gas from the drying chamber, the filters integrated in said chamber. Several plant modifications are suggested for performing the process which involves substantial savings by making external particle collectors superfluous.