Evaporation of heat sensitive materials

Claim 1

APPARATUS ADAPTED FOR CONCENTRATION OF HEAT SENSITIVE LIQUIDS COMPRISING A REFRACTORY LINED COMBUSTION ZONE HAVING AN INLET AT ONE END AND AN OUTLET AT AN OPPOSING END, THE OUTLET IN SAID COMBUSTION ZONE BEING JOINED WITH A TUBULAR MEMBER WHICH PROJECTS OUTWARDLY FROM SAID COMBUSTION ZONE, SAID TUBULAR MEMBER BEING SURROUNDED BY AN ANNULAR CHAMBER HAVING AN ANNULAR OPENING THEREIN ADJACENT THE OUTER WALL OF SAID TUBULAR MEMBER, MEANS FOR INTRODUCING RECIRCULATED COMBUSTION GASES TO SAID ANNULAR CHAMBER SO THAT THEY CAN PASS AXIALLY ADJACENT THE OUTER WALL OF SAID TUBULAR MEMBER, A SECOND ANNULAR CHAMBER AROUND SAID FIRST-MENTIONED ANNULAR CHAMBER, SLANTED OUTLETS IN SAID SECOND ANNULAR CHAMBER, THE CENTER LINES OF WHICH CONVERGE IN THE PATH OF HOT GASES PASSING OUT OF SAID TUBULAR MEMBER, MEANS TO INTRODUCE A LIQUID TO BE EVAPORATED INTO SAID SECOND ANNULAR CHAMBER, THEREBY CAUSING CONVERGING STREAMS OF SAID LIQUID TO BE MIXED CONCURRENTLY WITH SAID HEATED GASES AND SAID RECIRCULATED GASES, AND SEPARATING MEANS