Patent ID: 8968691
Filing Date: 2015-03-03
Classification: B01D

Abstract:
1. An exhaust gas treatment plant that removes sulfur oxide by wet type desulfurization of the exhaust gas and removes a sulfuric acid mist by feeding ammonia into the exhaust gas, comprising: a wet type flue gas desulfurization equipment; and a feeding unit containing inorganic ammonium salt, the feeding unit connected to the wet type flue gas desulfurization equipment, the feeding unit being capable of feeding the inorganic ammonium salt into the wet type flue gas desulfurization equipment, wherein the inorganic ammonium salt fed from the feeding unit generates an ammonia gas by being allowed to react with an alkali desulfurizing agent sprayed into the exhaust gas, the reaction taking place inside the wet type flue gas desulfurization equipment, the sprayed desulfurizing agent absorbing and removing sulfur oxide in the exhaust gas; a wet type electrostatic precipitator that removes the sulfuric acid mist allowed to react with the ammonia gas; and a recovery unit collecting washing liquid from the electrostatic precipitator, the recovery unit being configured to separate inorganic ammonium salt from the washing liquid and feed the separated inorganic ammonium salt discharged from the wet type electrostatic precipitator to the wet type flue gas desulfurization equipment.