Heat exchanger

Claim 1

A HEAT EXCHANGER FOR THE EXCHANGE OF HEAT BETWEEN TWO LIQUIDS WHICH REACT TO GENERATE HIGH PRESSURE GASES WHEN MIXED, COMPRISING A TANK HAVING AN INLET FOR ONE OF SAID LIQUIDS AT ITS UPPER END, A TUBE SHEET EXTENDING ACROSS SAID TANK BELOW SAID INLET, A SECOND TUBE SHEET EXTENDING ACROSS SAID TANK IN SPACED RELATION TO AND BELOW SAID FIRST TUBE SHEET, A SERIES OF TUBE ASSEMBLIES EACH COMPRISING AN OUTER TUBE SUPPORTED BY SAID SECOND TUBE SHEET AND EXTENDING THEREFROM DOWNWARDLY INTO SAID TANK AND AN INNER TUBE SUPPORTED BY SAID FIRST TUBE SHEET AND EXTENDING THEREFROM DOWNWARDLY INTO SAID OUTER TUBE IN CONCENTRIC RELATION THERETO, SAID OUTER TUBES BEING CLOSED AT THEIR LOWER ENDS AND COMMUNICATING AT THEIR UPPER ENDS WITH THE SPACE BETWEEN SAID TUBE SHEETS, SAID INNER TUBES BEING OPEN AT THEIR LOWER ENDS AND TERMINATING ADJACENT THE LOWER ENDS OF SAID OUTER TUBES, SAID INNER TUBES COMMUNICATING AT THEIR UPPER ENDS WITH SAID INLET, SAID TANK HAVING AN OUTLET FOR SAID ONE LIQUID LEADING FROM THE SPACE BETWEEN SAID TUBE SHEETS, SAID TANK BEING ADAPTED TO CONTAIN A BODY OF THE OTHER OF SAID LIQUIDS THEREIN AT A PREDETERMINED LEVEL BELOW SAID SECOND TUBE SHEET AND HAVING AN INLET FOR THE OTHER LIQUID BELOW SAID SECOND TUBE SHEET AND AN OUTLET THEREFOR AT THE LOWER END OF SAID TANK, PRESSURE SURGE DISSIPATOR MEANS COMPRISING A BODY OF AN INERT GAS CONTAINED BY SAID TANK ABOVE THE LEVEL OF SAID OTHER LIQUID, AN INLET IN SAID TANK ABOVE THE LEVEL OF SAID OTHER LIQUID FOR MAINTAINING SAID BODY OF INERT GAS AT A PREDETERMINED PRESSURE, A FURTHER OUTLET FROM SAID TANK, SAID FURTHER OUTLET ALSO BEING LOCATED ABOVE THE LEVEL OF SAID OTHER LIQUID, AND A PRESSURE RELIEF DIAPHRAGM NORMALLY CLOSING SAID LAST-MENTIONED OUTLET AND ADAPTED TO RUPTURE UPON EXPOSURE TO A SUBSTANTIALLY INCREASE IN THE PRESSURE IN SAID TANK TO PROVIDE AN OUTLET FOR THE REACTION PRODUCTS OF THE LIQUIDS IN THE EVENT OF A TUBE BREAK.