EXHAUST CLEANING METHOD

PROBLEM TO BE SOLVED: To reduce the concentration of nitric acid contained in a waste liquid in an exhaust gas cleaning device, in a method for cleaning an acid washing exhaust gas using an exhaust cleaning device and a dry denitrification device which are continuously arranged. SOLUTION: A water su...

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1. Verfasser:	SAKAGUCHI MOROHEI
Format:	Patent
Sprache:	eng
Schlagworte:	PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To reduce the concentration of nitric acid contained in a waste liquid in an exhaust gas cleaning device, in a method for cleaning an acid washing exhaust gas using an exhaust cleaning device and a dry denitrification device which are continuously arranged. SOLUTION: A water supplied into a nozzle 11 for the spraying of a cleaning water on an exhaust gas cleaning device 1 is heated to specified temperature (e.g. 50 deg.C) by a heat exchanger 15. Most of nitric acid fine particles in the acid wash exhaust gas are sent to a dry denitirication device 3 as a nitrogen oxide of the gas phase instead of dropping into a water storage part 14 by spraying a hot water to the acid washing exhaust gas ascending in the exhaust cleaning device 1.