Ammonia saturator and tar removal apparatus

Claim 1

IN SPRAY SATURATOR AND TAR ELIMINATING APPARATUS FOR THE PRODUCTION OF AMMONIUM SULPHATE FROM DISTILLATION GAS HAVING A SMALL AMMONIA CONTENT AND COMPRISING A VERTICALLY DISPOSED TANK STRUCTURE ENCLOSING A CHAMBER INCLUDING AN UPPER SUBSTANTIALLY UNOBSTRUCTED GAS SCRUBBING SPACE AND A LIQUOR DESUPERSATURATING AND CRYSTALLIZING BATH SPACE BELOW SAID SCRUBBING SPACE AND ARRANGED TO RECEIVE LIQUOR, TAR AND CRYSTALS FROM THE LATTER, AN OVERFLOW CONDUIT CONNECTED TO SAID STRUCTURE AND HAVING ITS INLET END OPEN TO SAID CHAMBER AT A LEVEL INTERMEDIATE THE UPPER AND LOWER ENDS OF SAID CHAMBER AND OPERATIVE TO DISCHARGE BATH LIQUOR AND TAR AT SAID LEVEL, SAID STRUCTURE HAVING A GAS INLET AND A GAS OUTLET RESECTIVELY OPENING TO LOWER AND UPPER PORTIONS OF SAID SCRUBBING SPACE, SPRAY NOZZLES MOUNTED IN SAID STRUCTURE TO DISCHARGE INTO SAID SCRUBBING SPACE, PUMPING AND CONDUIT MEANS CONNECTED TO SAID STRUCTURE TO WITHDRAW LIQUOR AND CRYSTALS FROM SAID BATH SPACE, AND TO PASS LIQUOR AND CRYSTALS THROUGH SAID SPRAY NOZZLES INTO SAID SCRUBBING SPACE THROUGH SAID SPRAY NOZZLES AND HAVING AN OUTLET FOR PASSING LIQUOR AND CRYSTALS TO CRYSTAL SEPARATING APPARATUS, AND MEANS FOR ADDING MAKE-UP ACID TO THE LIQUOR PASSED INTO SID SCRUBBING SPACE, THE IMPROVEMENT COMPRISING CONDUIT MEANS FOR CONNECTING SAID GAS INLET TO A SOURCE OF DISTILLATION GAS UNDER PRESSURE TO MAINTAIN A GAS PRESSURE IN SAID SCRUBBING SPACE SUBSANTIALLY ABOE THE PRESSURE OF THE ATMOSPHERE, A FIRST CLOSED TAR TANK CONNECTED TO SAID OVERFLOW FROM CONDUIT TO RECEIVE LIQUOR AND TAR OVERFLOWING FROM SAID BATH SPACE, SAID OVERFLOW KCONDUIT HAVING ITS OUTLET END OPENING INTO SAID TAR TANK AT A SECOND LEDVEL BELOW THE FIRST EMENTIONED LEVEL AND BELOW THE TOP OF SAID TAR TANK, THE LATTER AND BELOW THE TOP OF SAID OPEN TO SAID TAR TANK AT A THIRD LEVEL BELOW SAID SECOND LEVEL, A SECOND CLOSED TAR TANK INTO WHICH SAID SECOND OVERFLOW SAID SECOND LEVEL AND BELOW FOURTH LEVEL BELOW SAID SECOND LEVELS AND BELOW THE TOP OF SAID SECOND TAR TANK, A GAS PRESSURE EQUALIZING CONNECTION BETWEEN AND GAS SCRUBBING SPACE AN THE UPPER END PORTION OF EACH OF SAID TAR TANKS, SAID SECOND TAR TANK HAVING A TAR OUTLET OPENING TO THE TANK AT A LEVEL BELOW SAID SECOND LEVEL, AND MEANS FOR REGULATING FLOW THROUGH THE LAST MENIONED OUTLET.