Storage tank for cold liquids, and method for applying a thermal insulation system in such tank
OwnerHarry Van Ootmarsum, Marco Monzeglioinventors
Life of this patent
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Abstract
A double containment storage tank, suitable for storing cold liquids, is provided with a non-metallic thermal protection system. The storage tank can include a first vapour-tight and gas-tight PU coating applied by spraying on the inner surface of the floor and walls of the tank; a first insulation PU foam layer arranged on the inner side of the first coating; a second liquid-tight PU coating applied in at least the bottom corner sections of the tank by spraying on the inner surface of the first foam layer; a second insulation PU foam layer arranged on the inner side of the second coating; and a third liquid-tight PU coating arranged by spraying on the inner side of the second foam layer.
Claims34
Storage tank suitable for storing cold liquids, comprising a floor and walls meeting each other in a corner area, the storage tank further comprising a non-metallic thermal protection system on the inner surface of its floor and walls, this protection system comprising, at least in the corner areas, an array of layers arranged on top of each other, namely, seen from the walls towards the inside of the tank:
- a first foam layer having good thermal insulation properties;
- a liquid-tight coating applied on the inner surface of the first foam layer;
- a second foam layer having good thermal insulation properties, arranged on the inner side of the coating;
- a liquid-tight coating arranged on the inner side of the second foam layer;
- the first foam layer being fully embedded between liquid-tight layers.
Method for applying a thermal protection system in a cold liquid storage tank having a floor and walls, the thermal protection system comprising:
- a liquid barrier membrane for holding the liquid;
- a thermal insulation layer arranged between the membrane and the floor and walls of the tank;
- a secondary liquid barrier embedded within the thermal insulation layer;
- preferably, a vapour-tight and gas-tight liner attached to the inner surface of the floor and walls of the tank;
- wherein at least at one location of the tank, all layers of the thermal protection system are applied by a spraying process, preferably by spraying a substance on the basis of poly urethane.
Dependencies are inferred from the claim text.