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Shutdown Operating Procedures
The following procedure must be followed when shutting down the unit for extended periods
such as over weekend or for maintenance purposes.
Stop the automatic cycle
1. Close Plant Steam supply isolation valve.
2. Close RO feed water isolation valve.
3. Close condense outlet isolation valve.
4. Allow generator pressure to fall to the point pressing the manual command Clean
Steam outlet valve closes.
5. Close Clean steam isolation valve.
6. Open manual drain valve and leave open until both the tank and generator are empty.
7. Close all Isolation valves and lock off.
8. Turn off electrical power.
Emergency Shutdown Procedure
The following procedure must be followed in the event that an emergency shutdown is
required.
The Emergency Shutdown procedure must only be used in the event of an unusual
occurrence that requires the rapid isolation of the clean steam supply or in the unlikely
event of a malfunction within the Clean Steam Generator.
1. Press Remote Stop Button either on front panel or remote location.
2. Close plant steam supply isolation valve.
3. Close clean steam output isolation valve.
4. Close all other isolation valves.
Daily Operation - Steam Generator
The clean steam and energy source pressures should be checked at the respective pressure
gauges at least twice a day.
The unit has been equipped with a Feed Water Makeup System and Bottom Blowdown
Timer, these procedures are automated and need not be carried out by operating personnel.
Bottom Blowdown
Spirax sarco Compact Steam Generators are equipped with a drain and bottom blowdown
line. This valve can be automatic and it’s connected to the bottom of the vessel.
It can be programmed by PLC to obtain discharges in subsequential intervals of time.
∆
The blowdown from this valve is at the pressure and temperature of the
generated steam and can cause severe injury or death if not properly piped. It is
recommended that the blowdown lines be connected to a blowdown vessel before
being discharged to drain.
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