PYROLYSIS FURNACE WITH AN INTERNALLY FINNED U SHAPED RADIANT COIL

摘要

THE PRESENT INVENTION IS DIRECTED TOWARDS A FIRED HEATER FOR HEATING A PROCESS FLUID THAT USES U TUBES (14) PROVIDED WITH INCREASED INTERNAL HEAT TRANSFER SURFACE TO REDUCE TUBE METAL TEMPERATURES AND COKING AND AT THE SAME TIME IS NOT PRONE TO PLUGGING FROM COKE. THE FIRED HEATER COMPRISES A RADIANT SECTION ENCLOSURE (16) WITH A NUMBER OF U TUBES (14) IN THE RADIANT SECTION. THE U TUBES (14) ARE FORMED BY CONNECTING ONE OR MORE TUBULAR SECTIONS, AND THE U TUBES (14) ARE PROVIDED WITH INTERNAL GENERALLY LONGITUDINAL FINS. THE INVENTION ALSO IS DIRECTED TOWARDS A PROCESS UTILIZING A FINED HEATER WITH U TUBES (14) AS DISCLOSED FOR PRODUCING OLEFINS FROM HYDROCARBON FEEDSTOCKS.FIG. 3