Abstract <PICT:1045700/C1/1> <PICT:1045700/C1/2> A constriction plate for admission of hot fluidizing gas to a bed of material, e.g. pyrites, comprises a plurality of apertures having ducts therein for the passage of streams of said gas together with a cooler gas, arrangement being such that each stream of said hot gas is surrounded by cooler gas. Fig. 2 shows a portion of the constriction plate 26 adjacent to the chamber wall: fluidizing gas is admitted to a windbox below plate 26 and passes into pipes 30 which support cup members 64 serving to restrict flow of gas to pipes 30 and to prevent solids falling into the windbox. Each pipe 30 is surrounded at its upper end by a pipe member 54 to which a cooling gas can be supplied by means of manifold 72 via pipe 84 (see Fig. 6). Pipe 30 is supported on the plate by flange 60 and pipe member 54 supports a cup-shaped ceramic member 56. Cooling gas is supplied to manifolds 72 by pipe 76 and the arrangement of the manifolds and pipes 84 is such as to effect cooling (by the cool gas) of the plate, the body of which may be in the form of brick or other refractory placed or cast around the gas supply manifold and pipes. Fig. 3 (not shown) illustrates a spatial arrangement of these gas supply conduits.
IN A FLUIDIZED BED APPARATUS HAVING A CHAMBER, A CONSTRICTION PLATE FOR SUPPORTING A MASS OF SOLID PARTICLES IN SAID CHAMBER HAVING A PLURALITY OF APERTURES THEREIN, AND MEANS FOR PASSING FLUIDIZING GAS THROUGH SAID APERTURES; SAID MEANS COMPRISING: A FIRST CONDUIT MEANS IN SAID APERTURES IN FLOW COMMUNICATION WITH A SOURCE OF FLUIDIZING GAS, A SECOND CONDUIT MEANS IN SAID APERTURES SURROUNDING A PORTION OF SAID FIRST CONDUIT MEANS AND FORMING AN ANNULAR CHAMBER THEREBETWEEN, GAS MANIFOLD MEANS IN SAID CONSTRICTION PLATE AND ADJACENT THE TOP THEREOF, MEANS CONNECTING SAID GAS MANIFOLD MEANS TO SAID ANNULAR CHAMBER, MEANS SUPPLYING A GAS TO SAID GAS MANIFOLD MEANS AS A TEMPERATURE LESS THAN THE TEMPERATURE OF THE FLUIDIZING GAS, A CUP MEMBER MOUNTED IN SAID CONSTRICTION PLATE ABOVE AND ADJACENT SAID FIRST AND SECOND CONDUIT MEANS, AND SAID CUP MEMBER HAVING AN OPEN UPPER END AND AN OPEN LOWER END, SAID CUP MEMBER BEING POSITIONED WITH ITS LOWER END IN FLOW RELATIONSHIP WITH SAID FIRST AND SECOND CONDUIT MEANS AND RECEIVING GAS THEREFROM WHEREBY THE FLOW OF GAS FROM SAID FIRST CONDUIT MEANS AND SAID SECOND CONDUIT MEANS CREATES AN AREA OF HIGH VELOCITY IN SAID CUP MEMBER RESISTING THE SIFTING OF SOLIDS INTO SAID CUP MEMBER FROM SAID MASS OF SOLID MATERIAL.
Claim 2
Dependent Claim
212 words
IN A FLUIDIZED BED APPARATUS HAVING A CHAMBER, A CONSTRICTION PLATE FOR SUPPORTING A MASS OF SOLID PARTICLES IN SAID CHAMBER HAVING A PLURALITY OF APERTURES THEREIN, AND MEANS FOR PASSING FLUIDIZING GAS THROUGH SAID APERTURES; SAID MEANS COMPRISING: A FIRST CONDUIT MEANS IN SAID APERTURES IN FLOW COMMUNICATION WITH A SOURCE OF FLUIDIZING GAS, A SECOND CONDUIT MEANS IN SAID APERTURES SURROUNDING A PORTION OF SAID FIRST CONDUIT MEANS AND FORMING AN ANNULAR CHAMBER THEREBETWEEN, GAS MANIFOLD MEANS IN SAID CONSTRICTION PLATE AND ADJACENT THE TOP THEREOF, MEANS CONNECTING SAID GAS MANIFOLD MEANS TO SAID ANNULAR CHAMBER, MEANS SUPPLYING A GAS TO SAID GAS MANIFOLD MEANS AS A TEMPERATURE LESS THAN THE TEMPERATURE OF THE FLUIDIZING GAS, A CUP MEMBER MOUNTED IN SAID CONSTRICTION PLATE ABOVE AND ADJACENT SAID FIRST AND SECOND CONDUIT MEANS, AND SAID CUP MEMBER HAVING AN OPEN UPPER END AND AN OPEN LOWER END, SAID CUP MEMBER BEING POSITIONED WITH ITS LOWER END IN FLOW RELATIONSHIP WITH SAID FIRST AND SECOND CONDUIT MEANS AND RECEIVING GAS THEREFROM WHEREBY THE FLOW OF GAS FROM SAID FIRST CONDUIT MEANS AND SAID SECOND CONDUIT MEANS CREATES AN AREA OF HIGH VELOCITY IN SAID CUP MEMBER RESISTING THE SIFTING OF SOLIDS INTO SAID CUP MEMBER FROM SAID MASS OF SOLID MATERIAL.