After completion of this section you'll have an increased awareness of the safe
operation of an auxilary steam plant
we assume that the boiler has been out of operation for a while and that no
major maintenance work has been done check that the following valves are
closed main stop valve foam blowing valve bottom blowing valve vent valve on
economizer drain valve on economizer
check that the following valves are open all pressure gauge valves all level
gauge valves vent valve on steam drum vent valve on super heater drain valve
on super heater feed water valve
check that the tubing and connections the pressure gauges are open by blowing
through the tube must be full of condensate all the time
check the water level and refill if necessary use both auxilary and main
feedwater line for testing
start the air preheater check the combustion chamber for any oil spill if
everything is okay start the combustion air blower purge for two to four minutes
at full capacity re circle the fuel oil until you have the correct viscosity of
the burners select the smallest burner tips reduce the capacity on the blower
insert the torch and check the flame of the position of the torch open for fuel
to the burner and check for proper flame if okay remove the torch and check the
flame again if not okay closed fuel oil valve immediately and
increase the blower capacity to maximum again purge for two to four minutes
before you retry to ignite the burner depending on the size and design of the
boiler you should use one to two hours to reach full steam pressure this is to
avoid damage to the boiler furnace and tubes
after a while you can open the main steam valve
slightly to avoid sticking close the drain valve on the super heater keep the
vent valve on the super heater open until steam flow to consumers has been
established this steam flow is necessary to call the super heater blow through
the level gauges as the pressure is increasing the water level will rise but
be sure you're able to read the level all the time if the water level is too
high you can blow some of it off through the foam glowing valve do not use the
bottom blowing valve as long as you are firing the water level may also be too
low caused by draining and venting if you observe water hammering in the
economizer it should be cooled down by supply of feed water it is good practice
toward - between the burners during firing because this will make the
heating of the boiler more even when you have reached the operational pressure
you should start to heat the piping system by opening the drain valves check
for the water level is not too high before you open the main steam valve
this because the lower pressure on the steam line may cause water to enter the
super heater change the burner tips to normal size check again
oil air ratio before you switch to automatic control
check that the seawater valve with a condenser is closed and easy to open
open a seawater section valve and start seawater Panth slowly open the seawater
valve to the condenser and check the water flow start the condenser vacuum
pump steam ejector and check that it is working properly
when the pressures coming down check for the alarm condenser high-pressure is
reset start the condensate pump and check the condensate flow check that the
casing drain valve is open and check for water check that the steam supply valve
is closed open the steam exhaust valve completely check lubricating oil level
in the CEMP and possible water in the oil start the electrical lubricating oil
pump and check the pressure check differential pressure on the oil filter
open and check the gland steam system adjust the glam steam pressure when
there is a minor gland steam leaked to the atmosphere open to the glam steam
condenser close any heating of the new briquetting oil system reset the
emergency stop system open the stop valve slightly
check the turbine casing drain for water again continue to open the throttle
valve slowly until the turbine starts to rotate check for any unfamiliar sound
and vibrations keep the turbine rotating for a few minutes
increase the RPM until you reach idling speed or no load speed and continue to
run at this rpm for another five minutes check lubricating oil pressure and stop
the electrical lubricating oil pump check oil temperature and open for
lubricating oil cooling when above 40 degrees centigrade when the speed
control valve is in action open the emergency stop valve completely check
again that all indicates engaged readings are normal according to the
operating manual and transfer rpm control to remote control position
you
if possible you should start sub blowing before closing the oil fired boiler open
vent valve and drain valve slightly on the super heater close the oil to the
burners and remove them from the furnace keep the blower running for some time to
remove all gases from the furnace stop the blower and close the air intake to
avoid cold air entering the furnace when the steam pressures below normal
close the main steam valve when the steam pressures one to two bar you can
open the vent valve from the drain the super heater completely when the boiler
has cooled down the feed water valves must be closed shut down the air
preheater