Broad oven for treating acid hydrocarbon sludges

Claim 1

AN IMPROVED BOARD OVEN FOR THERMALLY TREATING ACID SLUDGE TO PRODUCE NOT ONLY OXIDES OF SULFUR IN A CONDITION SUITABLE FOR USE IN THE PRODUCTION OF SULFURIX ACID BUT ALSO CARBONACEOUS MATERIALS INCLUDING COKE SUITABLE FOR INDUSTRY WHICH COMPRISES AN ELONGATED RECTANGULAR COKING OVEN OF THE BOARD TYPE HAVING A FLAT FLOOR AND CAPABLE OF BEING SEALED AGAINST AIR, A HEATING FLUE SYSTEM ASSOCIATED WITH SAID OVEN TO SUPPLY HEAT TO EVOLVE GASES AND VAPORS CONTAINING HYDROCARBONS AND OXIDES OF SULFUR FROM SAID ACID SLUGE WHILE COKING CARBONACEOUS RESIDUE, SAID HEATING SYSTEM COMPRISING CROSS HEATING FLUES LOCATED DIRECTLY UNDER THE FLOOR OF THE OVEN TO PROVIDE CONTROLLABLE TEMPERATURES REQUIRED FOR VARIOUS FLOOR AREAS THROUGHOUT THE LENGTH OF THE OVEN AND SAID HEATING FLUES LOCATED IN EACH SIDE WALL OF THE OVEN WHEREBY SUFFICIENT HEAT IS PROVIDES TO PRODUCE AS HIGH A TEMPERATURE AS POSSIBLE TO VAPORIZE SUBSTANTIALLY ALL LIQUIDS, VAPORS AND GASES IN SAID ACID SLUDGE INCLUDING HYDROCARBONS AND OXIDES OF SULFUR AND TO COKE ANY CARBONACEOUS RESIDUE REMAINING AFTER THE FINAL GASSING OFF OF SUBSTANTIALLY ALL VAPORS AND GASES, A HEAT EXCHANGE UNIT ASSOCIATED WITH SAID HEATING FLJES TO TRANSFER HEAT FROM OUTGOING HOT BURNT PRODUCTS OF COMBUSTION TO INCOMING AIR WHEREBY PREHEATED AIR IS PRODUCED FOR SUPPORTING COMBUSTION IN SAID HEATING FLUES, A VAULTED ARCH OVER THE ENTIRE UPPER PART OF THE OVEN, A VAULTED ROOF LOCATED DIRECTLY OVER SAID ARCH AND SPACED THEREFROM TO PROVIDE A FUME CHAMBER, A PLURALITY OF PORTS IN SAID ARCH TO DIRECTLY CONNECT SAID OVEN TO SAID FUME CHAMBER, ATT LEAST ONE BURNER AND ASSOCIATED AIR PORT COMMUNICATING WITH SAID FUME CHAMBER TO PROVIDE HEAT AND AIR INSIDE OF THE SAME IN ORDER TO BURN HYDROCARBON VAPORS AND GASES VAPORIZED FROM ACID SLUDGE UNDER TREATMENT IN SAID OVEN AND TO PRODUCE BURNT PRODUCTS OF COMBUSTION, AND AN OUTLET PORT ASSOCIATED WITH SAID FUME CHAMBER FOR THE WITHDRAWAL OF GASES AND VAPORS CONTAINING OXIDES OF SULFUR AND BURNT PRODUCTS OF COMBUSTION.