Abstract 919,617. Storing liquefied gases; forcing liquids by gaseous pressure. LINDE'S EISMASCHINEN A.G. GES. FUR. Oct. 13, 1959 [Oct. 18,1958], No. 34681/59. Classes 8(2) and 102(2). In a container 1 for liquefied gas, the necessity for allowing adequate free volume for liquid expansion, is allocated by an overflow line 11a 11b and an evaporator 5, co-operating with an automatic pre-set pressure valve 9, gas being fed back to the free surface 2, of the liquid by the line 6. An outlet 10 in the base of the container 1, feeds the overflow line 11a and also a branch line 4 containing a valve 3 independently controlling the supply of liquid gas to the evaporator 5 for liquid ejection, when required, through the supply line 8. The overflow line may be taken out of the side of the container 1 at the critical height 12 or alternatively could penetrate the outlet 10 in the base forming a pipe coaxial with 10 and reaching up within the container 1 to the critical height 12. The overflow line 11a should be in close contact with the container 1 to prevent premature discharge to the evaporator 5 and lines 6 and 11b should be close together and away from the container 1 to reduce recirculation losses and to allow sufficient gas to be presented to the overflowing liquid to avoid siphoning liquid from said container.
TRANSPORT AND STORAGE TANK FOR LOW-BOILING LIQUEFIED GASES WITH A PRESSURE ATTACHMENT FOR DISCHARGING LIQUID GAS, SAID PRESSURE ATTACHMENT CONSISTING IN A KNOWN WAY OF AN EVAPORATOR THE UNDER PART OF WHICH IS IN CONNECTION WITH THE UNDERMOST PART OF SAID TANK BY WAY OF A CONTROLVALVE AND THE UPPER PART OF WHICH EVAPORATOR IS IN DIRECT CONNECTION WITH THE UPPER PART OF SAID TANK, CHARACTERIZED BY THE PROVISION OF AN AUTOMATIC SAFETY DEVICE AGAINST HIGH PRESSURE BY TEMPERATURE-EXTENSION OF THE LIQUID, SAID DEVICE CONSISTING OF A DIRECT OVERFLOW CONDUIT FROM SAID TANK (1), AT ITS CRITICAL LEVEL (12) WHICH THE LIQUID IS NOT ALLOWED TO SURPASS, TO SAID EVAPORATOR (5), FURTHER CHARACTERIZED IN THAT PART (11B) OF SAID DIRECT OVERFLOW CONDUIT EXTENDING FROM THE HEIGHT OF SAID CRITICAL LEVEL (12) EXTERIORLY OF SAID TANK (1) TO SAID EVAPORATOR (5) IS DISPOSED IN DIRECT HEAT-CONDUCTIVE CONTACT WITH SAID CONNECTIVE CONDUIT (6) FROM SAID EVAPORATOR (5) TO SAID UPPER PART OF SAID TANK (1).
Claim 2
Dependent Claim
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TRANSPORT AND STORAGE TANK FOR LOW-BOILING LIQUEFIED GASES WITH A PRESSURE ATTACHMENT FOR DISCHARGING LIQUID GAS, SAID PRESSURE ATTACHMENT CONSISTING IN A KNOWN WAY OF AN EVAPORATOR THE UNDER PART OF WHICH IS IN CONNECTION WITH THE UNDERMOST PART OF SAID TANK BY WAY OF A CONTROLVALVE AND THE UPPER PART OF WHICH EVAPORATOR IS IN DIRECT CONNECTION WITH THE UPPER PART OF SAID TANK, CHARACTERIZED BY THE PROVISION OF AN AUTOMATIC SAFETY DEVICE AGAINST HIGH PRESSURE BY TEMPERATURE-EXTENSION OF THE LIQUID, SAID DEVICE CONSISTING OF A DIRECT OVERFLOW CONDUIT FROM SAID TANK (1), AT ITS CRITICAL LEVEL (12) WHICH THE LIQUID IS NOT ALLOWED TO SURPASS, TO SAID EVAPORATOR (5), FURTHER CHARACTERIZED IN THAT PART (11B) OF SAID DIRECT OVERFLOW CONDUIT EXTENDING FROM THE HEIGHT OF SAID CRITICAL LEVEL (12) EXTERIORLY OF SAID TANK (1) TO SAID EVAPORATOR (5) IS DISPOSED IN DIRECT HEAT-CONDUCTIVE CONTACT WITH SAID CONNECTIVE CONDUIT (6) FROM SAID EVAPORATOR (5) TO SAID UPPER PART OF SAID TANK (1).