Pyrolysis heater

Claim 1

A FIRED HEATER COMPRISING AN ELONGATED SETTING HAVING OPPOSED VERTICAL PLANAR SIDE WALLS AND OPPOSED END WALLS ALL DEFINING A CHAMBER THEREBETWEEN, AT LEAST ONE PAIR OF OPPOSED TRANSVERSE VERTICAL BAFFLES MOUNTED IN THE CHAMBER, EACH OF THE BAFFLES OF A PAIR CONNECTED NORMAL TO OPPOSED SIDE WALLS AND EACH BAFFLE HAVING AN INWARD PROJECTION, THE INWARD PROJECTIONS OF EACH PAIR OF BAFFLE EXTENDING FROM ITS ASSOCIATED SIDE WALL TOWARD EACH OTHER FROM ONE-TENTH OF ONE-FOURTH THE WIDTH OF THE CHAMBER TO DIVIDE THE CHAMBER INTO AT LEAST A FIRST INVERSION ZONE LONGITUDINALLY DISPOSED RELATIVE AN ADJACENT SECOND INVERSION ZONE SO THAT THERMAL INVERSION CIRCUITS OF COMBUSTION GASES CAN BE ESTABLISHED IN EACH OF THE ZONES WITH SUBSTANTIAL INDEPENDENCE FROM THERMAL INVERSION CIRCUITS IN THE OTHER ZONE, A PLANAR TUBE BANK DESCRIBING A SUBSTANTIALLY VERTICAL SERPENTINE CONFIGURATION AND MOUNTED APPROXIMATELY MIDWAY BETWEN THE SIDE WALLS, THE TUBE BANK INCLUDING A FIRST AND SECOND TUBE PORTION IN THE FIRST AND SECOND INVERSION ZONES RESPECTIVELY, MEANS FOR CIRCULATING A PROCESS FLUID IN A FLOW SERIES THROUGH THE FIRST AND SECOND TUBE PORTIONS IN THAT ORDER, BOTH OF THE SIDE WALLS LINED WITH REFRACTORY TO DEFINE A FIRST AND A SECOND PAIR OF OPPOSED PLANER RADIATION SURFACES WITH THE FIRST PAIR OF RADIATION SURFACES EMBRACING THE FIRST TUBE PORTION AND THE SECOND PAIR OF RADIATION SURFACES EMBRACING THE SECOND TUBE PORTION, A FIRST BURNER MOUNTED IN OPERATIVE RELATIONSHIP RELATIVE EACH OF THE FIRST RADIATION SURFACES FOR HEATING THE FIRST RADIATIOSN SURFACES TO INCANDESCENE WHEREBY THE FIRST TUBE PORTION IS DOUBLE FIRED, A SECOND BURNER MOUNTED IN OPERATIVE RELATIONSHIP RELATIVE EACH OF THE SECOND RADIATION SURFACES FOR HEATING THE SECOND RADIATION SURFACES TO INCANDESCENCE WHEREBY THE SECOND TUBE PORTION IS DOUBLED FIRED, FIRST CONTROL MEANS FOR REGULATING THE HEAT OUTPUT OF THE FIRST BURNERS, SECOND CONTROL MEANS FOR REGULATING THE HEAT OUTPUT OF THE SECOND BURNERS, A SOURCE OF NORMALLY GASEOUS FUEL, EACH OF THE BURNERS HAVING A BLOCK WHICH DEFINES A HORIZONTALLY ELONGATED VERTICALLY OPENING TROUGH WITH A BOTTOM, EACH OF THE TROUGH ARRANGED BELOW AND ALONG ITS ASSOCIATED RADIATION SURFACE, EACH OF THE BOTTOMS DEFINING A PLURALITY OF ORIFICES COMMUNICATING IN FLOW SERIES WITH ITS ASSOCIATED TROUGH, MEANS FOR DELIVERING THE FUEL AND AIR TO THE TROUGH VIA THE ORIFICES SO THAT THE FUEL BURNS IN THE TROUGHS WITH A MINIMUM OF FLAME EXTENDING UPWARD INTO THE TROUGHS, EACH OF THE BLOCKS DEFINING A STEEP LIP ON THE INSIDE OF THE TROUGH REMOVE FROM THE ASSOCIATED RADIANT SURFACE AND ARRANGED TO SHIELD THE TUBE BANK FROM SEEING RADIATION EMITTER DIRECTLY FROM THE FLAME IN THE TROUGH.