Indirect or direct fired heater

Abstract

Abstract A SELECTIVELY INDIRECT AND DIRECT-FIRED AIR HEATER HAS A FIRE TUBE AND SHEEL SECTION, A BLOWER SECTION DETACHABLY CONNECTED TO THE FIRE TUBE AND SHELL SECTION AND ARRANGED FOR MOVING AIR THERETHROUGH, AND A PLURALITY OF HEATING UNITS SELECTIVELY CONNECTIBLE TO THE FIRE TUBE AND SHELL SECTION FOR PASSING COMBUSTION GASES TO A FIRE TUBE THEREOF. EACH HEATING UNIT IS DESIGNED TO BURN A DIFFERENT TYPE OF FUEL. THE FIRE TUBE AND SHELL SECTION HAS A HOUSING PROVIDED WITH A WALL DEFINING THE FIRE TUBE. A SHELL IS ARRANGED IN HEAT EXCHANGE RELATION WITH RESPECT TO THE HOUSING, AND IS PROVIDED WITH A WALL ARRANGED AROUND THE HOUSING WALL AND DEFINING A FLUID OR AIRFLOW PASSAGE HAVING INLET AND OUTLET OPENINGS. THE FIRE TUBE HAS AN OUTLET OPENING HAVING A FLANGED DUCT SURROUNDING SAME. A PIPE IN COMMUNICATION WITH THE SHELL INLET OPENING IS PROVIDED WITH A FLANGE WHICH IS SELECTIVELY JOINABLE WITH THE FLANGED DUCT FOR SELECTIVELY CONNECTING THE FIRE TUBE OUTLET OPENING TO THE SHELL INLET OPENING FOR CYCLING COMBUSTION GASES THROUGH THE AIRFLOW PASSAGE. THE FIRING IS DIRECT WHEN THE FIRE TUBE OUTLET IS SO CONNECTED, AND INDIRECT OTHERWISE. D R A W I N G

Inventors

• 👤 E Muckelrath

Bibliographic Details