Apparatus for conditioning air and gases for annealing steel plates and the like

Claim 1

APPARATUS FOR CONDITIONING ATMOSPHERES NECESSARY FOR THE WORKING OF METAL PLATE ANNEALING FURNACES, COMPRISING AT LEAST ONE ANNEALING FURNACE FOR METAL PLATES IN EXPANDED COILS, A PURIFICATION STATION CONTAINING MEANS FOR REDUCING THE CONCENTRATION OF THE CARBON OXIDES AND COMBINED NITROGEN CONCENTRATION OF THE GASES WHICH IT RECEIVES, MEANS AS TOWERS FOR CONVERSION OF CO BY WATER VAPOR, TOWERS FOR ABSORPTION OF CO2 BY WASHING WITH SODA OR METHANOLAMINE, ABSORPTION TOWERS HAVING ACTIVE CARBON, A SOURCE OF PURE HYDROGEN, A SOURCE OF PURE NITROGEN, AT LEAST ONE BRIGHT ANNEALING FURNACE, A SOURCE OF WATER OR WATER VAPOR, PIPE SYSTEMS CONNECTING SAID ELEMENTS WITH ONE ANOTHER IN SUCH A WAY THAT A RECYCLING CIRCUIT CONNECTS ON THE ONE HAND THE OUTLET OF THE PURIFICATION STATION WITH THE ENTRANCE OF THE EXPANDED COIL FURNACE AND, ON THE OTHER HAND, THE OUTLET OF THE SAID FURNACE TO THE ENTRANCE OF THE PURIFICATION STATION AND COMPRISES A MEANS OF CIRCULATION, A PIPE CONNECTING THE SOURCE OF HYDROGEN TO THE RECYCLING CIRCUIT, A WITHDRAWAL PIPE CONNECTING THE RECYCLING CIRCUIT TO THE BRIGHT ANNEALING FURNACE, A PIPE CONNECTING THE SOURCE OF NITROGEN TO THE WITHDRAWAL PIPE, AND A PIPE CONNECTING THE SOURCE OF WATER OR WATER VAPOR TO THE ENTRANCE OF THE FURNACE OR FURNACES FOR THE EXPANDED COILS.