EXHAUST GAS TREATMENT SYSTEM COMPRISING A DENITRATION DEVICE BETWEEN AN ELECTROSTATIC DUST COLLECTOR AND AN ACF DESULFURIZATION DEVICE

摘要

PURPOSE: To provide an exhaust gas treatment system which is able to decrease costs for treatment and equipment and downsize the system. CONSTITUTION: In a high temperature dry electrostatic dust collector (12), dust is removed from exhaust gas. In a denitration device (13), nitrogen oxides are removed from the exhaust gas. The exhaust gas is cooled to a predetermined temperature by an air heater (14), and then introduced into an ACF desulfurization device (16). In the ACF desulfurization device, the exhaust gas is humidified and cooled with dilute sulfuric acid, and introduced in the resulting saturated state into a desulfurization tower through an inlet. In the desulfurization tower, the exhaust gas passes through the catalyst layer sprayed with industrial water by spray nozzles, whereby dust, sulfur dioxide SO2, sulfur trioxide SO3, and trace metal elements in the exhaust gas are reacted and removed.