MARITIME PROTECTION FLEXINERT GAS GENERATOR

The Flex Inert Gas Generator system is a combination of a flue gas system and an inert gas generator. It creates inert gas out of the burning processes. The gas contains less than 5% oxygen and ensures a non-explosive atmosphere in the cargo tanks and their piping arrangement. As long as sufficient boiler flue gas is available, the inert gas generator is by-passed and the system works as a flue gas system. When no basis gas is available, it works as an inert gas generator

KEY FEATURES

  • Fully automatic operation
  • A horizontal and recessed combustion chamber that prevents fuel oil spill through SW drain line in case of misfire or dripping from fuel nozzle when not in operation
  • Automatic turn down ensures best possible fuel economy
  • PLC control logic with specially designed burner ignition sequence that will ensure a flawless ignition of the unit every time
  • Smart and solid design ensure reliable operation performance and easy maintenance

TECHNICAL INFORMATION

SYSTEM DESCRIPTION AND CONFIGURATION

The main purpose of the Flexinert gas production plant is to produce the required quantity of inert gas with the specified oxygen content. As long as sufficient boiler flue gas is available, the inert gas generator is by-passed and the system works as a flue gas system. When no basis gas is available, it works as an inert gas generator. 

The overall inert gas system consists of a combustion air blower, feeding air to the generator where the production of inert gas takes place. The generator has a design capacity as specified, and is automatically operated. In case the produced inert gas capacity is larger than the demand, the system automatically reduce its production.

The main sub-systems for an IGG are:

  • Combustion air blowers
  • Combustion chamber/scrubber
  • Fuel system
  • Control system with valves & instruments
  • Deck water seal & P/V breaker

Operation and maintenance

  • Graphical LCD operator terminal, all major process parameters displayed on the screen
  • Combustion chamber and cooling jacket in high performance austenitic stainless steel (ASTM N08904)
  • Easy access to burner and combustion chamber by hinged burner front door (no tools required)
  • Easy inspection and easy replacement of scrubber components by entering man hole and removable top plate
  • Easy installation
  • Data communication between panels

Options

  • Multiple LCD operator terminals
  • System signals and operation available for ships
  • IAS via MODBUS or ETHERNET communication
  • Tailor made systems

LCD operator terminal functionality

  • Start and Stop IG generator system
  • Monitor valve positions and motor running status
  • Adjust O2 set-point
  • Monitor process and status indication
  • Monitor alarm and adjust alarm set-points
  • Adjust controller set-points and parameters

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

 

SYSTEM APPLICATIONS

Flexinert gas systems are commonly used on tankers with large boilers for inerting of cargo tanks, cargo piping and machinery and purging of tanks.

 

Survitec Flexinert Gas Generator Vessel

 

SPECIFICATIONS

Table based on 3% O2 content by volume, pressure 400 mm WC and temperature 25°C.

Type

Inert gas
capacitiy
[m3/h]

Seawater
consumption
[m3/h]

 

Fuel
consumption
[kg/h]

Power
consumption
[kW]

Dimension
L x W x H [mm]

 

Weight
[kg]

MPG-400

500

30

37.5

7.5

1830 x 800 x 2225

1150

MPG-700

500- 2200

30 -132

37.5 - 165

7.5 - 33

3000 x 1000 x 2800

1500

MPG-800

2200- 3200

132 - 192

165 - 240

33 - 48

3300 x 1100 x 2800

1900

MPG-900

3200- 4500

192 - 270

240 - 337

48 - 67.5

3600 x 1200 x 4000

2200

 MPG-1000

4500- 5700

270 - 342

 337 - 427

67.5 - 85

4000 x 1400 x 4500

2500

 MPG-1100

5700- 6800

342 - 408

427 - 510

85 - 102

4500 x 1400 x 4500

3000

 MPG-1300

6800- 10500

408 - 630

510 - 787

102 - 157

5400 x 1800 x 4800

5000

 MPG-1600

10500- 16000

630 - 960

787 - 1200

157 - 240

6000 x 2100 x 5025

7000

 MPG-1600L

16000- 17500

960 - 1050

1200 - 1312

240 - 262

7000 x 2100 x 5025

9000

 

 

 

 

 

 

 

Gas composition with marine gas oil (MGO)

CO < 100 ppm

NOX < 100 ppm

N2 = Balance

Normal discharge pressure to cargo tank: 400 mm WC

SO2 < 1 ppm

CO2 approx. 14%

Gas outlet temperature: Max. 8°C above seawater temperature

Oxygen content adjustable down to 1%

Gas outlet humidity: 100%
saturated

Fuel: MDO/ HFO/ GASOIL/ GAS

 

RULES AND 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.

Survitec Flexinert Gas Generator Approvals

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