Stripping through Eductors

Ballast Discharge and stripping while Loading

VENT HEADER

INERT GAS HEADER

CONDENSATE RETURN LINE

LIQUID HEADER

Reliquefaction

VapourCompressor

L.P.G.Vaporizer

Inert Gas Generator

L.P.G.Heater

Air Blower

VAPOUR HEADER

liquid vapour

Cargo Refrigeration / Re-liquefaction at sea

Cargo refrigiration at sea• By reliquefaction plant

• Not to run compressor during heavy rolling

• Condensate is passed through the top sprayes –cooling down the liquid surface (the bulk of the liquid has not been cooled)

• To cool down bulk of the liquid condensate return should be through the bottom connection of the tank to ensure proper circulation

Cargo refrigiration at sea

• Reliquefaction plant run on more than one tank simultaneosly – carefully controled condensate return (to avoid overfilling of any one tank)

• Draft

• Stress

• Trim

Ballast Management /Exchange

Always follow ballast plan

De-ballast tanks adjacent to tanks being loaded

Always check stress & stability at least hourly

Ballast Management

Pre Discharge line cooling

VENT HEADER

INERT GAS HEADER

CONDENSATE RETURN LINE

LIQUID HEADER

Reliquefaction

VapourCompressor

L.P.G.Vaporizer

Inert Gas Generator

L.P.G.Heater

Air Blower

VAPOUR HEADER

liquidvapour

Discharge without vapour return

Discharging• Method depend on type of ship, cargo

specification, terminal storage or bunker vesselcapacity.

• Discharge by pressurising the vapour space

–shore vapor suply or vaporiser and compressoron board

• Discharge with or without booster pumps

–discharging limited by pipeline diametar

–booster pump – for long distances or higherlevels

• Discharge via booster pump and cargo heater

–when discharged from refrigirated ship topressurised terminals

VENT HEADER

INERT GAS HEADER

CONDENSATE RETURN LINE

LIQUID HEADER

Reliquefaction

VapourCompressor

L.P.G.Vaporizer

Inert Gas Generator

L.P.G.Heater

Air Blower

VAPOUR HEADER

liquid vapour

Discharge with vapour return

Cryogenic pump flow system & use of inducer

Cryogenic pump

Spray Pump

A vertical, 3560 rpm centrifugal pump, with integral 440 V, 3 Phase, 60 Hz, 2 Pole, submersible 35 kW electrical motor.

The pump is configured, with a balance drum, as a fixed, in-tank, stripping and spray pump.

Start Discharge With Electric Ballast Pump

Discharge valve

Electric motor

Pump

1. Fill pipelines and pump

2. Start motor

3. Slowly open discharge valve