To provide a urea-water injector for exhaust-gas treatment wherein when urea water is heated and evaporated by an electric heater, power consumption of the electric heater is reduced, while inhibiting occurrence of urea-deposition.
Non-heating part of sheath-type heaters is sealed and secured to a member continuous to an exhaust-gas flue, and the heating part of the sheath-type heater is disposed in the inside space of the flue. The heating part of the sheath-type heater is folded back at the center into a double-coil thus to spray the urea-water concentrically. In such constitution, the urea-water spray is evaporated and prevented from coming into contact with low-temperature wall-surface. Thus, urea deposition is prevented from occurring, the heat generated by the heater is blocked from escaping to the outside, and thus the power consumption is reduced.
AMO KIYOSHI
YOKOTA HIROSHI
MURAKAMI TERUHIKO
| JP2006170013A | 2006-06-29 | |||
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Yuji Toda