Procedures start and stop Inert Gas Generator

Inert Gas Generator

Operation based on the combustion of a low sulphur content file and the cleaning and drying of the exhaust gases
Good combustion is essential
Oxygen level controls the ratio of the air / fuel to the burner
IG plant includes an inert gas generator, a scrubbing tower unit, two combustion-air blower,
An effluent water seal, a fuel injection unit, an intermediate dryer unit (refrigeration type), a final dryer unit, and an instrumentation/control system
Dry air/inert gas plant operation local and fully auto control mode
Demister for water droplets and trapped moisture
Freon dryer unit reduces dew point to 5 deg.C
Absorption dryer-dual vessel desiccant dryer reduces dew point further
Pressure control valve at the outlet of the dryer unit maintains constant pressure throughout the system, thus ensuring a stable flame at the generator
Dew point and oxygen content of the inert gas produced are permanently monitored.
Purge valve and the deliver valve-fail safe solenoid operated acting in reverse direction
Connection to the cargo piping system through two non-return valves and a spool piece

Operation schedule and procedure is determined and coordinated with persons in the engine room, CCR and deck
Lubrication of all running machinery ensured
Manual operational check of all system valves
Power for operating equipments to be switched on

Pre purge operation to be confirmed
Purge air and IG for predetermined interval after start is vented out
Automatic ignition and main burner operation as per the automatic operation program to be verified normal
Atomizing steam pressure via special super heater in the combustion chamber
Oxygen content adjustment done and maintain the combustion condition-Flame colour through peep hole good indicator
Absorbent type dryer and the refrigerating dryer put into operation
Confirm that the operating parameters of each part are normal
Main supply to deck start after dew-point temperature and the oxygen content is as per the set point and stable

Main selector valve from the tank or the hold change over to atmosphere
Stop the adsorbent dryer and the refrigerating dryer as per the instructions
Confirm that predetermined operation takes as per the programmed stop sequence. Ensure post purge and fuel cut off for IG mode
Fuel to the burner cut off and the post-purge operation to be verified