Cupola waste gas heat exchange and purifying system

Claim 1

APPARATUS FOR SIMULTANEOUSLY COOLING AND PURIFYING THE DISCHARGES GASES FROM A CUPOLA AND FOR PREHEATING AIR BEING CHARGED THERETO, WHICH COMPRISES IN COMBINATION, A SEPARATE CONFINED COMBUSTION CHAMBER CONNECTED WITH THE UPPER PORTIN OF SAID CUPOLA AND HAVING FUEL INLET MEANS CONNECTED THERETO, A HEAT EXCHANGE SECTION CONNECTING WITH AND POSITIONED BELOW SAID COMBUSTION CHAMBER SUITABLE FOR RECEIVING THE RESULTING DICHARGE GASES AND ENTRAINED MATERIAL IN A DOWNWARD FLOW, A BY-PASS CONDUIT FROM SAID COMBUSTION CHAMBER AND CONNECTED WITH CENTRIFUGAL PARTICLE SEPARATING MEANS, FLUID INLET AND SPRAYING MEANS CONNECTING WITH THE INTERIOR OF SAID BY-PASS CONDUIT, AN AIR INLET CONDUIT CONNECTED WITH SAID HEAT EXCHANGE SECTION AND A HEATED AIR CONDUIT CONNECTED BETWEEN SAID HEAT EXCHANGE SECTION AND SAID CUPOLA WHEREBY AIR PASSING IN INDIRECT HEAT EXCHANGE RELATIONSHIP WITH THE HOT DISCHARGE GASES FROM THE CUPOLA MAY BE PRE-HEATED PRIOR TO BEING INTRODUCED INTO THE LATTER, A SPRAYING ZONE CONNECTED WITH AND POSITIONED BELOW THE OUTLET END OF SAID HEAT EXCHANGE SECTION WHEREBY DISCHARGE GASES LEAVING THE LATTER PASS IN A DOWNWARD DIRECTION INTO THE SPRAYING ZONE, FLUID INLET AND SPRAYING MEANS CONNECTED WITH THE INTERIOR OF SAID SPRAYING ZONE, SLURRY OUTLET MEANS FROM THE LATTER, CONDUIT MEANS FOR COOLED AND SPRAYED DISCHARGE GASES FROM SAID SPRAYING ZONE CONNECTED WITH SAID BY-PASS CONDUIT, FLOW CONTROL MEANS POSITIONED WITHIN SAID BY-PASS CONDUIT AND WITHIN THE COOLED GAS DISCHARGE CONDUIT, TEMPERATURE SENSITIVE MEANS IN SAID HEATED AIR CONDUIT TO SAID CUPOLA, AUTOMATIC REGULATING MEANS CONNECTING SAID TEMPERATURE SENSITIVE MEANS TO SAID FLOW CONTROL MEANS IN SAID CONDUITS, WHEREBY TO CONTROL FLOW OF DISCHARGE GASES THROUGH SAID HEAT EXCHANGE SECTION, AND CONDUIT MEANS CONNECTING SAID PARTICLE SEPARATING MEANS WITH AN OUTLET STACK.