AIR POLLUTION CONTROL SYSTEM, AIR POLLUTION CONTROL METHOD, SPRAY DRYING DEVICE OF DEWATERING FILTRATION FLUID FROM DESULFURIZATION DISCHARGED WATER, AND METHOD THEREOF

摘要

To include a boiler 11 that burns fuel F, an air heater 13 that recovers heat of flue gas 18 from the boiler 11, a first precipitator 14 that reduces dust in the flue gas 18 after heat recovery, a desulfurizer 15 that reduces sulfur oxides in the flue gas 18 after dust reduction by an absorbent, a dewaterer 32 that reduces gypsum 31 from desulfurization discharged water 30 discharged from the desulfurizer 15, a spray drying device 34 including an atomizer that atomizes a dewatering filtration fluid 33 discharged from the dewaterer 32, and a flue-gas introducing line L11 that introduces a part of the flue gas 18 into the spray drying device 34.

主权项

1. A spray drying method of a dewatering filtration fluid from desulfurization discharged water
comprising: atomizing a dewatering filtration fluid with a spray nozzle; introducing flue gas so as to dry the dewatering filtration fluid; confirming an atomization state of a spray nozzle and determining whether atomization of the dewatering filtration fluid is appropriate; and cleaning the spray nozzle and removing ash deposit attached around the spray nozzle when the atomization is inappropriate.