Chemical and heat absorbing apparatus

Claim 1

APPARATUS FOR CONCENTRATING RESIDUAL PULP LIQUOR AND FOR SCRUBBING CHEMICAL DUST AND FUME FROM HOT FLUE GASES INCLUDING A FURNACE WHEREIN CONCENTRATED LIQUOR IS BURNED TO FORM SAID HOT FLUE GASES, SCRUBBING APPARATUS COMPRISING A FIRST VENTURI SCRUBBER AND A SECOND VENTURI SCRUBBER ARRANGED IN SERIES, SAID VENTURI SCRUBBERS EACH INCLUDING A VENTURI DUCT SECTION FOLLOWED IN A GAS FLOW SENSE BY A LIQUID AND GAS SEPARATOR, MEANS FOR PASSING SUBSTANTIALLY ALL OF THE HOT GASES FROM SAID FURNACE IN SERIES THROUGH SAID FIRST AND SECOND VENTURI SCRUBBERS, FIRST NOZZLE MEANS POSITIONED TO DISCHARGE CONCENTRATED SPRAYED LIQUOR INTO SAID FIRST VENTRUI DUCT SECTION, MEANS INCLUDING A PIPING SYSTEM AND PUMP FOR RECIRCULATING CONCENTRATED LIQUOR FROM THE LIQUID AND GAS SEPARATOR OF SAID FIRST SCRUBBER TO SAID FIRST NOZZLE MEANS, SEEMED NOZZLE MEANS POSITIONED TO DISCHARGE SPRAYED LIQUID INTO SAID SECOND VENTURI DUCT SECTION, MEANS INCLUDING A PIPING SYSTEM AND PUMP FOR RECIRCULATING LIQUID FROM THE LIQUID AND GAS SEPARATOR OF SAID SECOND SCRUBBER TO SAID SECOND NOZZLE MEANS IN THE CORRESPONDING VENTURI DUCT SECTION, MEANS FOR ADDING MAKEUP LIQUID TO SAID SECOND VENTURI SCRUBBER, PIPE MEANS CONNECTING THE PIPING SYSTEM OF SAID FIRST VENTURI SCRUBBER WITH SAID FURNACE FOR A CONTROLLED FLOW OF CONCENTRATED LIQUOR TO SAID FURNACE FOR BURNING SAID LIQUOR THEREIN, AND CONDUIT MEANS FOR PASSING A CONTROLLED FLOW OF LIQUID FROM THE PIPING SYSTEM OF SAID SECOND VENTRUI SCRUBBER TO SAID FIRST VENTURI SCRUBBER.