Abstract 1,010,870. Furnace recuperators; heatexchanger tube elements. H. ESCHER. Dec. 24, 1963 [Nov. 29, 1963], No. 50904/63. Heading F4S. A furnace recuperator comprises a flue 3 in which are arranged longitudinally extending tubes 10 of elongated cross-section each with its major axis directed towards the centre of the flue, means such as the headers 9 and 13 for conveying air first to the tubes where it is heated, and then from the tubes, deflectors 17 secured either to the tubes (as shown) or to the flue wall, for causing the flue gas to circulate in opposite directions around adjacent tubes, and/or means within the tubes including partition members 21 for causing the air to flow in a helical path through the tubes. In the recuperator shown, air flows also through a jacket 6 around the flue 3. The tubes may be connected to the upper header 8 by joints permitting relative expansion (Fig. 4, not shown).
A COMBUSTION FURNACE RECUPERATOR COMPRISING A FLUE HAVING AN INLET END, AND EVEN NUMBER OF HOLLOW HEAT TRANSFER MEMBERS ARRANGED WITHIN THE FLUE AND EXTENDING LONGITUDINALLY OF THE FLUE, EACH HEAT TRANSFER MEMBER BEING OBLONG IN CROSS-SECTION WITH TWO FLAT SIDES DIRECTED TOWARD THE CENTRE OF THE FLUE, MEANS FOR LEADING GAS TO BE HEATED TO THE INTERIORS OF ONE END OF EACH HEAT TRANSFER MEMBER, MEANS FOR LEADING HEATED GAS FROM THE INTERIORS OF THE OTHER END OF EACH HEAT TRANSFER MEMBER, A PLURALITY OF STRAIGHT OBLIQUELY POSITIONED DEFLECTORS SECURED TO THE OUTSIDE OF THE FLAT SIDES OF THE EVEN-NUMBERED HEAT TRANSFER MEMBERS, DEFLECTORS ON OPPOSITE SIDES OF A HEAT TRANSFER MEMBER BEING OPPOSITELY DIRECTED, WHEREBY FLUE GAS IS CAUSED TO CIRCULATE AROUND THE EVEN-NUMBERED HEAT TRANSFER MEMBERS IN ONE DIRECTION, AND A PLURALITY OF STRAIGHT OBLIQUELY POSITIONED DEFLECTORS SECURED TO THE OUTSIDE OF THE FLAT SIDES OF THE ODD-NUMBERED HEAT TRANSFER MEMBERS, DEFLECTORS ON OPPOSIDE SIDES OF AN ODD-NUMBERED HEAT TRANSFER MEMBER BEING OPPOSITELY DIRECTED, AND ADJACENT DEFLECTORS ON RESPECTIVE EVEN AND ODD-NUMBERED HEAT TRANSFER MEMBERS BEING SIMILARLY DIRECTED, WHEREBY FLUE GAS IS CAUSED TO CIRCULATE AROUND THE ODD-NUMBERED HEAT TRANSFER MEMBERS IN A DIRECTION OPPOSITE TO SAID ONE DIRECTION.
Claim 2
Dependent Claim
202 words
A COMBUSTION FURNACE RECUPERATOR COMPRISING A FLUE HAVING AN INLET END, AND EVEN NUMBER OF HOLLOW HEAT TRANSFER MEMBERS ARRANGED WITHIN THE FLUE AND EXTENDING LONGITUDINALLY OF THE FLUE, EACH HEAT TRANSFER MEMBER BEING OBLONG IN CROSS-SECTION WITH TWO FLAT SIDES DIRECTED TOWARD THE CENTRE OF THE FLUE, MEANS FOR LEADING GAS TO BE HEATED TO THE INTERIORS OF ONE END OF EACH HEAT TRANSFER MEMBER, MEANS FOR LEADING HEATED GAS FROM THE INTERIORS OF THE OTHER END OF EACH HEAT TRANSFER MEMBER, A PLURALITY OF STRAIGHT OBLIQUELY POSITIONED DEFLECTORS SECURED TO THE OUTSIDE OF THE FLAT SIDES OF THE EVEN-NUMBERED HEAT TRANSFER MEMBERS, DEFLECTORS ON OPPOSITE SIDES OF A HEAT TRANSFER MEMBER BEING OPPOSITELY DIRECTED, WHEREBY FLUE GAS IS CAUSED TO CIRCULATE AROUND THE EVEN-NUMBERED HEAT TRANSFER MEMBERS IN ONE DIRECTION, AND A PLURALITY OF STRAIGHT OBLIQUELY POSITIONED DEFLECTORS SECURED TO THE OUTSIDE OF THE FLAT SIDES OF THE ODD-NUMBERED HEAT TRANSFER MEMBERS, DEFLECTORS ON OPPOSIDE SIDES OF AN ODD-NUMBERED HEAT TRANSFER MEMBER BEING OPPOSITELY DIRECTED, AND ADJACENT DEFLECTORS ON RESPECTIVE EVEN AND ODD-NUMBERED HEAT TRANSFER MEMBERS BEING SIMILARLY DIRECTED, WHEREBY FLUE GAS IS CAUSED TO CIRCULATE AROUND THE ODD-NUMBERED HEAT TRANSFER MEMBERS IN A DIRECTION OPPOSITE TO SAID ONE DIRECTION.