Pressure equalizer and discharger of a blast furnace

Claim 1

IN A BLAST FURNACE SYSTEM COMPRISING: A BLAST FURNACE TO BE CHARGED WITH CHARGING MATERIAL; A BELL HOPPER CHARGING APPARATUS ATTACHED TO THE TOP OF SAID BLAST FURNACE AND HAVING DOWNWARDLY ARRANGED CONSECUTIVE FIRST AND SECOND HOPPERS EACH WITH AN INDEPENDENTLY CONTROLLED BELL WHEREBY SAID SECOND HOPPER IS CONNECTED VIA A DISCHARGE VALVE WITH THE OUTER ATMOSHPERE; A DRY DUST CATCHER THE INPUT OF WHICH IS CONNECTED TO SAID BLAST FURNACE; A PRIMARY DUST CATCHER THE INPUT OF WHICH IS CONNECTED TO THE OUTPUT OF SAID DRY DUST CATCHER AND THE OUTPUT OF WHICH IS CONNECTED VIA A PRIMARY EQUALIZER VALVE WITH SAID SECOND HOPPER; AND A PERSSURE EQUALIZER AND DISCHARGER COMPRISING A TURBO-BLOWER THE OUTPUT OF WHICH IS CONNECTED VIA A SECONDARY EQUALIZER VALVE WITH SAID SECOND HOPPER AND THE INPUT OF WHICH IS CONNECTED WITH THE OUTPUT OF SAID PRIMARY DUST CATCHER, PRESSURE CONTROL MEANS INSTALLED IN A BYPASS PIPE CONNECTING THE OUTLET OF THE TURBO-BLOWER WITH THE PRIMARY DUST CATCHER, CHARGING OPERATION CONTROL MEANS WHICH CONTROLS THE ENTIRE OPERATION SCHEDULE OF SAID PRIMARY EQUALIZER, DISCHARGE AND SECONDARY EQUALIZER VALVES.