Réservoir pour les gaz liquéfiés

摘要

1,177,231. Liquefied gas containers. G. J. H. TREPAUD. 27 Jan., 1967 [28 Jan., 1966; 10 June, 1966; 12 Jan., 1967], No. 4071/67. Heading F4P. In the event of an undue external temperature rise, liquefied gas e.g. butane stored under pressure at or below a level 16 in an inner tank 1, Fig. 1, is caused to rise up the annular space 7 between tank 1 and a surrounding tank 5 thereby cooling the latter and the so-vaporized butane is freed of entrained liquid particles by passage through a conventional separator 13, 14, 15 and is then passed through a duct 12 containing a bursting disc 23 to an open-air burner system (not shown). The bottom portions of tanks 1, 5 are connected by ducts 8, 81 having normally closed valves 10, 101 which open at a predetermined temperature to allow access of liquid butane to annular space 7 and also through apertures 20, 21 in hollow tank-supporting legs 2. Liquid particles separated by an annular baffle 14 and a filter mesh 15 are returned through a funnel 13 and a vertical duct 3 to the lower portion of the outer tank 5. The latter is coated externally by an asbestos layer 6. In a modification the upper and lower portions of inner tank 1, Fig. 4, are open to the outer tank 5 and liquid forced up space 7 is vaporized,. freed from liquids by baffles 45, 13, 14 and is relieved through valves 70, 701 to the open-air burner. In a further modification, when the upper and lower portions of the inner tank 1, Fig. 5,. are open to the tank 5, the inner tank is formed of separate segments 1a, 1b, Fig. 7, secured along their edges to spaced rectangular sectional ducts 46, 461 which extend in vertical meridian planes and are welded to the outer tank 5. The duets are open at their lower ends 47, 471 and are connected at their upper ends 48, 481 to atmosphere through a fuzible disc 50, Fig. 6 and a next duct 49 and also to the inner tank through a non-return valve 52.