Patent ID: 8986428
Filing Date: 2015-03-24
Classification: B01D,C02F,F23J,Y02P

Abstract:
1. A spray drying method of a dewatering filtration fluid from desulfurization discharged water comprising: atomizing a dewatering filtration fluid into a spray drying device body with a spray nozzle; introducing flue gas so as to dry the dewatering filtration fluid; confirming an atomization state of the spray nozzle and determining whether atomization of the dewatering filtration fluid is appropriate; cleaning the spray nozzle and removing ash deposit attached around the spray nozzle when the atomization state is inappropriate; measuring a plurality of temperatures inside the spray drying device body with a plurality of thermometers, the plurality of thermometers being provided in the spray drying device body at predetermined intervals in a direction of a gas flow of the flue gas; obtaining a temperature distribution of the plurality of temperatures as a function of positions of the plurality of thermometers; monitoring a dried state of the dewatering filtration fluid with the temperature distribution; and adjusting supply amounts of the flue gas and of the dewatering filtration fluid, when the temperature distribution has a substantially flat portion and thus drying of the dewatering filtration fluid is not sufficient.