WinGD X72DF - High-Pressure SCR; High-Pressure SCR - Arrangement

Marine Installation Manual 2021-08 7-3
7 Engine Emissions
7.1 Exhaust gas emissions
X72DF
High-pressure SCR
The SCR reactor is located on the high-pressure side, before the turbine.
Integrating the SCR reactor before the turbine allows the reactor to be designed
in the most compact way due to the higher density of the exhaust gas.
WinGD has developed and is systematically deploying high-pressure SCR solu-
tions for the complete 2-stroke engine portfolio with single- and multi-turbo-
charger applications. Furthermore, WinGD allows high-pressure SCR suppliers
to interface third-party branded products to the engine, provided that interface
specifications are met.
Figure 7-3 High-pressure SCR — Arrangement
The Concept Guidance for HP-SCR installation (DG 8159) is provided on the
WinGD webpage under the following link:
SCR piping guide
SM-0251
Exhaust receiver
Scavenge air receiver
SCR
1
10
8
7
6
1211
9
5
4
3
2
1 Exhaust receiver
2 Turbocharger
3 SAC
4 Scavenge air receiver
5 Auxiliary blower
6 SCR
7 Urea dosing unit
8 Reactor inlet valve
9 Reactor outlet valve
10 SCR bypass valve
11 Turbine bypass valve
12 Pressure relief valve