Fig. 30: Carrying Out Wet Cleaning Of Turbine; Table 15: Wet Cleaning Of Turbines, Parameters For 1-Nozzle Cleaning - 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
7.3.6 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.
It is imperative that turbine cleaning parameters are observed.
u
CAUTION
Maximum temperature at turbine inlet during cleaning
During cleaning, the temperature at the turbine inlet will rise and may strain
the material significantly.
Make sure the maximum temperature at the turbine inlet is not exceeded
u
during cleaning.
Fig. 30: Carrying out wet cleaning of turbine
Fulfil prerequisites.
u
Ensure that there is a supply of water (01).
u
Open the stop valve (02) and set the water volume flow V
u
cleaning parameters).
Close the stop valve (02) after 10 minutes.
u
Wait for 10 minutes; do not change the load during this stabilisation phase.
u
If the cleaning result is unsatisfactory or there is water leakage, contact a Turbo Systems
service station.
Parameter for 1-nozzle cleaning
Product Temperature be-
fore turbine before
cleaning [°C]
A150 350 ... 430
A155 350 ... 430
Table 15: Wet cleaning of turbines, parameters for 1-nozzle cleaning
1)
Corresponds to a water pressure p
before the cleaning nozzle
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Maximum temperature
before turbine during
cleaning [°C]
530
530
of 1.5 bar (overpressure compared to atmosphere)
WT
HZTL4032_EN
with a flowmeter (03) (see
W
Water volume flow
3 1)
V [dm /min]
W
14.0
19.0
Rev.S
Injection time
[min]
10
10
February 2022