Abstract:
781,354. Storing liquefied gases. CONSTOCK LIQUID METHANE CORPORATION. Sept. 16, 1955 [March 16, 1955], No. 26580/55. Classes 8(2) and 102(2). [Also in Group XXXIII] A plurality of separate liquefied gas, e.g. methane storage tanks 5 are held in nested relation within a metal container by a heat insulation lining 4 thereof, e.g., of balsa wood. The container comprises a double-walled hull of a ship (see Group XXXIII] and each tank 5 which is of aluminium or austenitic steel capable of resisting fatigue at low temperatures is connected by a downpipe 7 to an insulated manifold 6 and by a short pipe 8 to a gas discharge manifold 9 which has a branch 10 opening to the interior pores of the balsa wood lining 4. The thickness of the latter is such that any liquefied methane coming into contact therewith is vaporized before reaching the inner wall 3 of the hull. Methane may be discharged as vapour through manifold 9 and valve 3 by passing warm air or liquid between the hull walls 1, 3 or the vapour may serve to force liquid methane up the pipes 7 and along a manifold 6 and through a pipe 12 coupled thereto and discharging into a storage vessel 10a. Air which may have entered the tanks, e.g. during filling thereof, is expelled by carbon dioxide vaporized from a solid block of carbon dioxide at the bottom of each tank.
Abstract:
789,755. Storing liquefied gases. CONSTOCK LIQUID METHANE CORPORATION. July 15, 1955 [April 6, 1955], No. 20628/55. Class 8(2). A liquefied gas storage vessel at substantially atmospheric pressure comprises an outer metal casing 1, Fig. 3, lined with means whereby a cushion or blanket of vapour is interposed between the liquid 12 and the casing wall. A plurality of spaced superposed louvres 9 of heat insulating material secured round the casing wall have skirts 10 which trap vapour in pockets 11. The louvres 9 may be lined with balsa wood or embedded in such blocks 16 as shown in Fig. 5. Alternatively the louvres are dispensed with and the casing lined with blocks of balsa wood glued together and having the grain running horizontally with the casing wall. The liquid seeps into the wood assisted by capillary attraction and is there vaporized before reaching the casing wall to provide the blanket of vapour.