Fig. 29: Turbine Cleaning Devices; Table 14: Turbine Wet Cleaning, Recommended Operating State - ABB HT612300 Operation Manual

Operation Manual / A150-M56/66/57/67 - A155-M..
7 Periodic maintenance work / 7.3 Cleaning the turbine during opera-
tion
7.3.5 Prerequisites
Two different turbine cleaning devices are available for turbochargers with single-inlet tur-
bine casing:
Fig. 29: Turbine cleaning devices
1. Device consisting of one cleaning nozzle per turbine casing gas inlet.
2. Device consisting of six cleaning nozzles with connecting pipe for water and scavenging
air.
Characteristic/component
Cleaning device
Engine load (guideline value)
1
) Turbine inlet temperature T
water injection
Stabilisation phase after T
reached
Stabilisation phase after turbine clean-
ing
Water supply
Water temperature
Water pressure (overpressure compared
to atmosphere) p
WT
2
) External air supply
External air pressure p
PA
bine inlet pressure P
TE
Table 14: Turbine wet cleaning, recommended operating state
1
) The temperature at the turbine inlet can be up to 100 °C higher than the exhaust gas tem-
perature after the cylinder. This must be taken into account when setting the operating
point before cleaning.
If necessary, the engine performance must be reduced to meet these conditions. The clean-
ing cycle can be started when the above conditions are fulfilled.
2
) External air supply for continuous blowing off of the cleaning nozzles between cleaning in-
tervals.
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one cleaning nozzle per
before
TE
has been
TE
relative to tur- P
HZTL4032_EN
Conditions
gas inlet
20 ... 40 %
350 ... 430 °C
10 minutes
10 minutes
ensured
5 ... 30 °C
1.5 bar
recommended
= P + 0.5 bar
PA TE
six cleaning nozzles
2.5 bar
recommended
P = P + 1 bar
PA TE
Rev.S February 2022