System for processing exhaust gas, and method for processing exhaust gas

Provided are a system for processing exhaust gas and a method for processing exhaust gas, whereby operating cost and volume of wastewater are significantly reduced, and the supplied amount of an NOx reducing agent and a mercury oxidizing agent can be controlled. In the system for processing exhaust...

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Bibliographische Detailangaben
Hauptverfasser:	SUGITA SATORU, OKINO SUSUMU, INABA NORIKAZU, HONJO SHINTARO, HASHIMOTO JUN, ITO MOTOFUMI, OKAMOTO TAKUYA
Format:	Patent
Sprache:	eng
Schlagworte:	PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	Provided are a system for processing exhaust gas and a method for processing exhaust gas, whereby operating cost and volume of wastewater are significantly reduced, and the supplied amount of an NOx reducing agent and a mercury oxidizing agent can be controlled. In the system for processing exhaust gas according to the present invention, an aqueous solution including an ammonium halide is sprayed into a flue, NOx is reduced in a denitrification unit and mercury is oxidized, and SOx and mercury are removed in a desulfurization unit. In the system for processing exhaust gas, ammonium sulfate and/or ammonium carbonate is added to wastewater, from which CaSO4 has been separated, the wastewater having been discharged from the desulfurization unit, and an ammonium halide is generated. The wastewater including the ammonium halide is sprayed as the aqueous solution.