Key Features
- Up to 50% reduction in weight and foot-print compared to conventional systems
- Continuous regeneration of dryer
- Modern design for easy installation and maintenance
- 100% automatic control, no manual adjustments required by operator
- Dew point below minus 45degC reached 20-40 minutes after start, decreasing to below minus 60-65degC
- Constant & uniform dew point during operation
- High grade steel (SST 904) used for the combustion chamber
- Mechanically simple and reliable centrifugal blowers due to low pressure drop in system
- MODBUS communication with IAS
- In dry air mode: no need of IG generator. Only cooler, dryer and dry gas blower in use saving time and cost
Technical Information
System description and configuration
The complete Dry Inert Gas Generator is made up of three sub systems.
- Inert Gas Generator, utilising Maritime Protection’s well proven inert gas generator
- Cooler and dryer skid with fi n type cooler, and Maritime Protection’s new concept – the rotating adsorption dryer
- Refrigeration plant, closed loop type, with no Freon transported into the cooler unit
The Maritime Protection Dry Inert gas generator produces clean and soot free inert gas by combustion of gas oil supplied by the fuel oil pump with air provided by blowers, in the combustion chamber of the inert gas generator. The gas is efficiently cooled in the scrubber tower and the saturated gas is dried in a two stage process:
- A cooler compromising of a fi nned tube coil reduces the humidity to +5ºC dew point. The cooling effect in the cooler is provided through a glycol/ water circuit from a separate water chiller unitler, dryer and dry gas blower in use
- The final drying is achieved by a continuously rotating adsorption dryer, dew point below minus 45degC
Operation and maintenance
- Fully automatic, for unattended operation
- No manual adjustments required
- All process parameters displayed on operator panel
- Modes of operation can be selected on operator panel, no manual changes when changing mode
- Easy maintenance through:
- Hinged burner front door allowing easy access
- Filters, dryer rotor and other major components can be easily checked through inspection hatches
Options
- Multiple operator terminals
- Ethernet communication with IAS (modbus is standard)
- Electric or steam regeneration heater
System configuration with compact cooler and rotating adsorption dryer
Rotating adsorption dryer
- Far more efficient, more compact and require less maintenance than any previous old dual bed dryer
- Constant regeneration (regenerating saturated desiccant in same rotational cycle)
- 20% of weight compared to "old conventional two bed" dryer
Utilizing the more maintenance friendly centrifugal blowers
- Virtually no maintenance
- Less noise and vibration
Closed loop cooling system provided through a glycol/water circuit from a separate water chiller unit
- Less possibility for leaks of Freon
- Requires less Freon/refrigerant
Rotating adsorption dryer – compact design
System Applications
Dry Inert gas systems are commonly used on:
- LNG carriers
- LPG carriers
- FRSU
- FLNG
Combustible Inert gas is used to:
- Inerting and drying of cargo tanks, cargo piping and machinery
- Purging of tanks
- The dry inert gas generator in fresh air mode:
- Used for aeration of cargo tanks before inspection
- Drying and aeretion of hold space
Rules & Regulations
The Maritime Protection Inert Gas Systems are built in accordance with 1974 SOLAS Convention with latest amendments, and are fulfilling all of Class, IMO’s guidelines and the demanding conditions of shipboard operation.
