STARTING OF IG SYSTEM& IG PLANT PARTS AND FUNCTIONS

 Starting of IG System

• Boiler should be on.
• Set the line for deck seal pump 
• Set the line for scrubber pump
• Set the line for O2 analyser.
• Set the line on blower,
• Now put the breaker to on position.
•  Ig starts & running.

Function of ig parts.

Scrubber tower:

• Gas will be cooled down to working temperature.
• Solid particles will removed 
• Soluble gas and Sox and carbon gases set mixed with water and draun out.

Demister 

•  Demister made on wire gauge.
• Act as a water absorbent.
• It Moisture will removed and gas will br dry.

Blower

• There will be two blower .
• One for stand by another one will send the gas freeing to cargo tank.

Pressure regulator valve 

• It regulates ig pressure asper discharge rate of cargo and maintain always  positive pressure inside the tank.

O2 analyser.

• It will analyse the oxygen content flowing with gas 

Temperature recorder.

• If ig gas above 57°c it will not allow the gas to cargo tank.

Bleed valve 

• Its a three way valve  .if o2 content is High in ig gas it will open the valve send the gas to atmosphere.

Deck seal.

• It is a non return valve.which will not alow the gas back.

Non return valve.

• Secondary valve . preventive the back flow of gas.

Pv valve

• Safety fitted in the tank to prevent the exclusive vacuum and pressure build-up in the cargo tank it will release the pressure to atmosphere.

Pv breaker.

• Which is fitted in common ig line. When suddenly increase of vacuum and pressure it will open and release the pressure and vaccum.

Mast valve 

• Common ventilating system for cargo tanks . While loading and unloading it should be open.

Deck isolation valve.

• It will isolates the ig line from ig plant.

Vapour line 

• To receive shore supply of ig gass 
• To discharge ig gas to shore storage tank