Kiln for regeneration of contact material

Claim 1

A KILN ADAPTED FOR REGENERATION OF A SOLID PARTICLE FROM CONTACT MASS MATERIAL WHICH HAS BECOME SPENT BY DEPOSITION OF A CARBONACEOUS DEPOSIT THEREON AND WHICH EXISTS AT A TEMPERATURE SUITABLE FOR INITIATING COMBUSTION OF SAID DEPOSIT, WHICH COMPRISES IN COMBINATION: A VERTICAL VESSEL, MEANS FOR INTRODUCING SPENT CONTACT MATERIAL MATERIAL INTO THE TOP OF THE VESSEL, SAID CONTACT MATERIAL GRAVITATING DOWNWARDLY THROUGH FOR INTRODUCING CONCOMITIALLY COMPACT COLUMN, MEANS FOR INTRODUCING CONCOMITANTLY A FIRST AND SECOND STREAM OF COMBUSTION-SUPPORTING GAS INTO THE COLUMN AT AN INTERMEDIATE LEVEL ALONG THE LENGTH OF THE VESSEL SPACED BELOW SAID CONTACT MATERIAL INLET MEANS, MEANS FOR WITHDRAWING THE FIRST STREAM OF FLUE GAS FROM AN UPPER SECTION OF THE VESSEL WITHOUT COOLING THE GAS DURING PASSAGE THROUGH THE COLUMN, INDIRECT HEAT EXCHANGER COILS LOCATED IN THE LOWER SECTION OF THE VESSEL BELOW THE GAS INLET MEANS ADPATED TO CONTACT AND COOL THE GRAVITATING CONTACT MASS AND THE SECOND STREAM OF COMBUSTION-SUPPORTING GAS PASSING DOWNWARDLY THROUGH THE COLUMN, A GROUP OF GAS COLLECTORS LOCATED BELOW THE COOLING COILS ADAPTED TO PROVIDE A GAS COLLECTING SPACE SHIELDED FROM THE CONTACT MATERIAL COLUMN, MEANS FOR INTRODUCING A COOLING GAS IN SUFFICIENT AMOUNT DIRECTLY INTO THE GAS COLLECTORS TO COMMINGLE WITH THE HOT FLUE GAS IN THE RATIO OF BETWEEN 1/9 TO 1 AND 1 TO 1 TO PREVENT AFTERBURNING, A HORIZONTALLY LOCATED PARTITION PLATE NEAR THE BOTTOM OF THE VESSEL AND BELOW THE COLLECTORS DEFINING AN ENCLOSED PLENUM REGION IN THE BOTTOM OF THE VESSEL, CONDUIT MEANS FOR WITHDRAWING THE MIXTURE OF FLUE GAS AND COOLING WITH A MINOR PROPORTION OF ARTICLES FROM THE COLLECTORS INTO THE ENCLOSED PLENUM REGION, A MULTIPLICITY OF CONDUITS DEPENDING FROM SAID PARTITION PLATE ADAPTED FOR THE WITHDRAWAL OF PARTICLEFROM MATERIAL FROM THE BOTTOM OF THE COLUMN TO LOCATIONS NEAR THE BOTTOM OF THE VESSEL, MANS DEFINING OUTLETS LOCATED BELOW THE OUTLETS OF THE DEPENDING CONDUITS IN THE BOTTOM OF THE VESSEL THROUGH WHICH PARTICLE-FORM MATERIAL DISCHARGED FROM THE CONDUITS IS SEPARATED FROM THE GASES IN THE ENCLOSED PLENUM REGION AND IS WITHDRAWN, AND MEANS DEFINING AN OUTLET AT AN UPPER LEVEL OF THE ENCLOSED PLENUM REGION LOCATED BELOW THE PARTITION PLATE AND ABOVE THE OUTLETS OF THE DEPENDING CONDUITS THROUGH WHICH DENUDED GASES ARE WITHDRAWN.