Gas inlet assembly for oil tanks
AssigneeGBA Marine AS
InventorsRune Bö, Helge K. Aasen
Life of this patent
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Abstract
A gas inlet assembly for oil tanks, connectable to a gas inlet pipe, for the maintenance of pressure and a non-explosive atmosphere during unloading of oil from an oil tank has at least one inlet conduit arranged to direct a unidirectional flow of gas from the inlet pipe to a primary inlet nozzle. The primary inlet nozzle includes a spreader element configured to spread the inflowing inert gas within the tank with a horizontal velocity component larger than the vertical velocity component.
Claims13
An oil tank gas inlet assembly connectable to a gas supply pipe for maintenance of pressure and a non-explosive atmosphere during unloading of oil from an oil tank, comprising:
- at least one inlet conduit having a cross-sectional dimension that is larger than a cross-sectional dimension of the gas supply pipe;
- at least one inlet conduit being arranged to direct a unidirectional flow of gas from the gas supply pipe to a primary inlet nozzle having a spreader element configured to spread the flow of gas within the oil tank, wherein the flow of gas has a horizontal velocity component larger than a vertical velocity component;
- and
- a secondary inlet nozzle configured to supply the flow of gas into the oil tank at a vertical velocity,
- wherein the vertical velocity of the flow of gas supplied by the secondary inlet nozzle is greater than the vertical velocity component of the flow of gas of the primary inlet nozzle, and
- wherein the secondary inlet nozzle is arranged to supply the flow of gas into the oil tank at a level below the spreader element.
An oil tank gas inlet assembly connectable to a gas supply pipe for maintenance of pressure and a non-explosive atmosphere during unloading of oil from an oil tank, comprising:
- at least one inlet conduit having a cross-sectional dimension that is larger than a cross-sectional dimension of the gas supply pipe;
- at least one inlet conduit being arranged to direct a gas flow from the gas supply pipe to a primary inlet nozzle having a spreader element configured to spread the flow of gas within the oil tank, wherein the flow of gas has a horizontal velocity component larger than a vertical velocity component;
- and
- a secondary inlet nozzle configured to supply the a flow of gas into the oil tank at a vertical velocity,
- wherein the secondary inlet nozzle is arranged to supply the flow of gas into the oil tank at a level below the primary inlet nozzle, and
- where the vertical velocity of the flow of gas supplied by the secondary inlet nozzle exceeds 3 m/s at a predetermined position below the secondary inlet nozzle and the vertical velocity component of the flow of gas supplied by the primary inlet nozzle is less than 0.2 m/s.
An oil tank gas inlet assembly connectable to a gas supply pipe for maintenance of pressure and a non-explosive atmosphere during unloading of oil from an oil tank, comprising:
- at least one inlet conduit having a cross-sectional dimension that is larger than a cross-sectional dimension of the gas supply pipe;
- at least one inlet conduit being arranged to direct a gas flow from the gas supply pipe to a primary inlet nozzle having a spreader element configured to spread the gas flow within the oil tank, wherein the flow of gas has a horizontal velocity component larger than a vertical velocity component;
- and
- a secondary inlet nozzle configured to supply a flow of gas into the oil tank at a vertical velocity,
- wherein the secondary inlet nozzle is arranged to supply the flow of gas into the oil tank at a level below the primary inlet nozzle, and
- where the vertical velocity of the flow of gas supplied by the secondary inlet nozzle is greater than the vertical velocity component of the flow of gas supplied by the primary inlet nozzle and the vertical velocity component of the flow of gas supplied by the primary inlet nozzle is less than 0.2 m/s.
Dependencies are inferred from the claim text.