IL34440A - A bulk storage system for flammable liquids - Google Patents

Description

STORAGE SYSTEM FLAMMABLE LIQUIDS K 544402 h to invention o closely packed buoyant spheres the surface of stored liquid provided impermeabl which that a suppressan supplied to a point above the liquid surface forms a reduces fire risk to a substantial arrangement according to the invention ma to storage of a liquids may be defined as a bulk ayatera in the stored liquid completely occupied by closel packed buoyan an may provided on the container to supply fire suppressan medium above the surface in the event of fire a layer of medium above said Certain features of the invention by way of on the aecompanyihg drawings in is a view illustrating a storag for flammable liquid having a number of layers of buoyant spheres on the surface of the and 3 are views illustrating hollow buoyant spheres in with another of the shown on the a liquid storage tainer of any suitable indicated at 4 and is o conventional being for example forme of supported above ground surface or least partly in the container is provided with a cover 5 and with 6 and for ting liquid the container and withdrawing liquid and surface of the liquid is provided with t least la er of buo ant s heres as in ted at 8 a cover wit venting 10 for admitting a fire suppressant suc as foam to the space above the many may desirable for the of ighting foam to the upper part purpose pipe may receive a suppl a pipe which foam is supplied from a genera I cases it be supplied by a pump by a pump contro uni 1 e pum control 1 is controlled by flame detector 16 fitted to th centre of the cover 5 and coupled to the unit 14 through a lea ring 11 number of distributed delivery conveniently of neck through which foam delivered through an outlet into the container in a direction towards inner wall so that it dow the or rebounds from the until it reaches the layers o buoyant spheres where it spreads uniforml over the of the blanket formed by the spheres 8 on surface of the liquid with little mixing foam with the to promote rapid fire buoyant spheres provide a which even is partially fused by the action of a fire nevertheless assists in maintaining a coherent layer of fhe provision of spheres on the surface of stored naturally provides the advantages which are inherent in the use of such spheres on the exposed face of a for of by ation and air and atmospheric reduction i evaporation o a liquid is a One the use of buoyant provision the delivery of foam to a s o is tha i is not necessary to provide lieated the storage for effecting distribution of a foam over the starface of th stored Buoyan on liquid surface ensure that if is pumped to the foam in the this foam spreads ou o to the buoyan spheres without contact with the stored liquid even if the splashes down from a considerable as be the if the container were nearly iapty thereby rapid extinction of the spheres dela of the liquid wit the foam and prevent or minimise ially of where the stored liquid an The heat from result in partial fusion of surfaces o the to a more or less coherent capable of supporting of the the liquid She buoyant spheres referred to y be o preferabl of by a shell of as Conveniently such 8 forme by blow a Such may be formed with a peripheral rib or welt which added of the spheres when placed On the surface sur cei of moreover with additional projecting o the covered with suitabl spaced Hollow produced blow Moulding will normally be however be filled with as nitrogen or dioxide or with a or or with insufficientOCRQuality

Claims (1)

1. A liquid container for flammable comprising at least one layer of buoyant spheres floating on surface the liquid the layer spheres so formed being confined solely by the walls of containe to form protective blanket on the whole of said surface to reduce emission of flammable vapour from the and external means delivering a suppressant the upper of the container to rest on said layer to suppress fire above said said layer minimizing mixing o the fire suppressant medium and the liquid to maintain effectiveness of means for delivering a fir suppressant medium to the upper of the contalner comprising a delivery pipe disposed circumferentlally the upper portion of container for feeding producing substances to a plurality o clrcumferentlally distributed delivery nozzles which deliver oamed products toward the inner surface of the wall of the container along suc products flow layer buoyant sphere and then over liquid A liquid container according to claim 1 wherein the buoyant spheres consist of thermoplastic formed with an equatorial welt to limit free rotation in the liquid and which the thermoplas ic material is capable of fusing unde conditions at the of contact between to coherent networks insufficientOCRQuality