Operation Manual / 4 Product description / A150-M58/68
6 Periodic maintenance work / 6.3 Cleaning the turbine during opera-
tion
© Copyright 2020 ABB. All rights reserved.
HZTL4041_EN
Rev.D
March 2020
6.3.6
Carrying out wet cleaning of the turbine
CAUTION
Inadmissible thermal stress and flooding of the turbine
Smaller amounts of water can lead to an inadequate cleaning result. Larger
amounts of water lead to inadmissible thermal stress on the turbine com-
ponents and can cause flooding of the turbine.
u
It is imperative that turbine cleaning parameters are observed.
CAUTION
Maximum temperature at turbine inlet during cleaning
During cleaning, the temperature at the turbine inlet will rise and may strain
the material significantly.
u
Make sure the maximum temperature at the turbine inlet is not exceeded
during cleaning.
Fig. 24: Carrying out wet cleaning of turbines
u
Fulfil prerequisites.
u
Ensure that the water supply (01) is guaranteed.
u
Open the stop valve (02) and set the water volume flow V
W
with a flowmeter (03) (see
cleaning parameters).
u
Close the stop valve (02) after 10 minutes.
u
Wait for 10 minutes; do not change the load during this stabilisation phase.
If the cleaning result is unsatisfactory or there is water leakage, contact an ABB Turbochar-
ging Service Station.
Parameter for 1-nozzle cleaning
Product
Temperature be-
fore turbine before
cleaning [°C]
Maximum temper-
ature before tur-
bine during clean-
ing [°C]
Water volume flow
V
W
[dm
3
/min]
1)
Injection time
[min]
A150
350 ... 430
530
14.0
10
Table 12: Wet cleaning of turbines, parameters for 1-nozzle cleaning
1)
Corresponds to a water pressure p
WT
of 1.5 bar (overpressure compared to atmosphere)
before the cleaning nozzle
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