ABB TPL65-A32 - Page 62

Operation Manual / TPL65-A32 / -A33 / -A36 + TPL69-A32 / -A33
Maintenance
5
Cleaning turbine blades and nozzle ring
in operation
5.4
Page 60
September 2014 HZTL2498_EN Revision A
The interval between periodic cleaning is very dependent on the operating
conditions. In general, cleaning should be carried out every
50
to
200
operating hours
.
When cleaning the turbine components during operation, use wet
cleaning. This cleaning method has been tested and approved by ABB
Turbo Systems.
Prerequisites for wet cleaning are that the engine builder approves the
process and his instructions are followed.
During wet cleaning using droplets of water, the water does not act as a
solvent. Instead, the deposit is removed by the mechanical impact of the
drops.
CAUTION
Corrosion and deposits when cleaning
Damage and impairment of turbocharger parts due to salt water and
cooling water additives
 Don't use salt water for cleaning, but only clean fresh water.
NOTICE
Components at the turbine end are not cleaned until the engine has
been started or the engine load reduced. The exhaust gas temperature
must
not
exceed the value specified in the respective cleaning
instructions. (See respective section
Operating state prerequisites
.)
CAUTION
Non-observance of the specified exhaust gas temperature in front of the
turbine, the minimum
stabilising time
before as well as between
cleaning operations and the drying time after cleaning in accordance
with the pertaining cleaning instructions drastically shortens the
expected service life of components.
For V-engines with
several turbochargers
on each engine, we recommend
parallel cleaning of both turbochargers. This cleaning process is faster
and the risk of turbocharger surging is reduced. We recommend
conducting tests to find the most suitable method.
Wet cleaning interval
Cleaning method
Principle of wet cleaning
V-engines
© Copyright 2014 ABB. All rights reserved.