Engine room planning
Exhaust gas ducting
Figure 6: Example: Exhaust gas ducting arrangement
MAN Diesel & Turbo recommends that the SCR
reactor housing should be mounted before all other
components (e.g. boiler, silencer) in the exhaust
duct, coming from the engine side. A painting on
the inside wall of the exhaust duct in front of the the
SCR system is not allowed.
All of the spaces/openings for cleaning and mainte-
nance on the entire unit, including air reservoir mod-
ule, dosing unit and reactor housing with soot-
blowers must be accessible.
We strongly recommend that in front of the reactor
housing sufficient space for the maintenance per-
sonal and/or for the temporary storage of the cata-
lyst honeycombs has to be foreseen (see section
SCR System).
Catalyst elements could reach a weight of 25 kg,
the reactor openings could reach a total weight of
about 70 kg, MAN Diesel & Turbo strongly recom-
mends a lifting capability above the reactors.
A very important point is the transportation way and
storage space of the catalyst honeycombs within
the funnel for supply of the SCR reactor during
maintenance or catalyst refreshment, one reactor
could contain more than 100 elements.
To avoid time-consuming or implementation of a
scaffolding, MAN Diesel & Turbo strongly recom-
mends at minimum a lifting device in the funnel or
any kind of material elevator. A porthole from out-
side rooms on level with the reactor housing is also
a possibility, as far as those rooms could be sup-
plied with the catalyst honeycombs.
MAN Diesel & Turbo
3700467-8.1
Page 17 (17)
SCR (Selective Catalytic Reduction)
B1600 0
V28/32S, L28/32S, L28/32H, L27/38S, L27/38, L23/30S, L23/30H, L21/31S,
L21/31, L16/24S, L16/24
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