EXHAUST EMISSION CONTROL DEVICE

PROBLEM TO BE SOLVED: To miniaturize device constitution related to NOxreduction purification using urea water as a reducing agent, to improve mountability onto a vehicle. SOLUTION: This exhaust emission control device is equipped with a selective reduction type catalyst 10 at an intermediate part o...

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Bibliographische Detailangaben
1. Verfasser:	NAKAGOME KEIICHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To miniaturize device constitution related to NOxreduction purification using urea water as a reducing agent, to improve mountability onto a vehicle. SOLUTION: This exhaust emission control device is equipped with a selective reduction type catalyst 10 at an intermediate part of an exhaust pipe 9 and constituted to add urea water 17 as the reducing agent upstream of the selective reduction type catalyst 10 to carry out reduction purification of NOx. A mixer 20 equipped with a plurality of dispersion plates 19 for allowing exhaust gas 7 to meander to equally disperse the spray of urea water 17, is provided between the added position of the urea water 17 and the selective reduction type catalyst 10. Each dispersion plate 19 and an internal wall 20' of the mixer 20 carry hydrolytic catalysts 25 for decomposing the urea water 17 into ammonia and carbon dioxide. COPYRIGHT: (C)2006,JPO&NCIPI