Operation Manual / 4 Product description / A150-M56/66/57/67 -
A155-M..
6 Periodic maintenance work / 6.3 Cleaning the turbine during opera-
tion
© Copyright 2020 ABB. All rights reserved. HZTL4032_EN Rev.P 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 temperature
before turbine during
cleaning [°C]
Water volume flow
V
W
[dm
3
/min]
1)
Injection time
[min]
A150 350 ... 430 530 14.0 10
A155 350 ... 430 530 19.0 10
Table13: 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
Page 46 / 171
To Next Page
Loading...
Need help?
General
