•
Valves
The valves in the LP SCR system are used for the different operation modes. The LP SCR
system has the valves that follow:
○
V1 - reactor inlet valve
○
V2 - reactor outlet valve
○
V3 - reactor bypass valve
○
V4 - turbine bypass valve
The turbine bypass valve (V4) is also used for other functions of the ECS, for example for
low-load tuning (LLT) or for steam production control (SPC).
4.12.1.2 Layout
The LP SCR system can be designed in different layouts related to the project. Two examples are
shown in Figure 4-13 and Figure 4-14.
Fig 4-13 LP SCR temperature controlled (example)
V3
V1
V4
V2
003
004
005001
006
002
Legend
001 Engine 004 Burner
002 Urea dosing unit 005 LP SCR reactor
003 Decomposition unit 006 Turbocharger
X92-B
AA00-9270-00AAA-043B-A
Operation Manual LP Selective catalytic reduction system
Winterthur Gas & Diesel Ltd.
- 93 - Issue 002 2021-11
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