Method and apparatus for handling fluidized solids

• US 2,881,133 A
• Filed: 06/28/1954
• Issued: 04/07/1959
• Est. Priority Date: 06/28/1954
• Status: Expired due to Term

• Current Assignee: Byron V. Molstedt, Robert S. Whiteley
• Original Assignee: Byron V. Molstedt, Robert S. Whiteley
• Inventors: Whiteley, Robert S., Molstedt, Byron V.
• Application Number:
  US03/439,702
• Time in Patent Office: 1,744 Days
• US Class Current: 208/164
• CPC Class Codes: B01J 19/26 Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
• CPC Class Codes: B01J 2208/00292 involving reactant solids
• CPC Class Codes: B01J 2208/00539 Pressure
• CPC Class Codes: B01J 2208/00548 Flow
• CPC Class Codes: B01J 2208/00584 Controlling the density
• CPC Class Codes: B01J 8/18 with fluidised particles combustion apparatus with fluidised bed in general F23C10/00; furnaces with fluidised bed F27B15/00
• CPC Class Codes: B01J 8/26 with two or more fluidised beds, e.g. reactor and regeneration installations
• CPC Class Codes: C10B 55/08 in dispersed form
• CPC Class Codes: C10B 55/10 according to the "fluidised bed" technique
• CPC Class Codes: C10G 11/18 according to the "fluidised-bed" technique
• CPC Class Codes: C10G 9/32 according to the "fluidised-bed" technique

Claims

1. 2. IN A PROCESS INVOLVING THE CONTACTING OF SEPARATE GASEOUS STREAMS WITH A FINELY DIVIDED SOLID HAVING A TRUE DENSITY OF 80 TO 200 LBS./FT3 IN TWO SEPARATE CONTACTING VESSELS CONTAINING FLUIDIZED BEDS OF SAID FINELY DIVIDED SOLIDS, AND WHEREIN SAID FINELY DIVIDED SOLID, RANGING IN SIZE FROM 0 TO 1000 MICRONS, WITH ABOUT 175 TO 200 MICRONS BEING AVERAGE, FLOWS FROM ONE OF SAID VESSELS TO THE OTHER THROUGH A J-SHAPAED CONDUIT INTERCONNECTING SAID VESSELS, SAID J-SHAPED CONDUIT BEING CHARACTERIZED BY A VERTICALLY DISPOSED STANDPIPE SECTION ENDING IN AN ACUTE BEND, AN INCLINED RISER SECTION INCLINED MMORE THAN 50* FROM THE HORIZONTAL, COMMENCING AT SAID BEND AND TERMINATING IN A VERTICALLY DISPOSED RISER SECTION, SAID ACUTE BEND LOCATED A SUBSTANTIAL DISTANCE BELOW SAID FLUIDIZED BED;

THE METHOD OD CONTROLLING THE RATE OF FLOW OF SOLIDS BETWEEN SAID VESSELS WHILE LIMITING PRESSURE SURGING AND WHILE MAINTAINING AN EFFECTIVE GAS SEAL THEREBETWEEN. WHICH COMPRISES FLOWING SAID FINELY DIVIDED SOLIDS FROM ONE OF SAID VESSELS DOWNWARDLY THROUGH SAID VERTICALLY DISPOSED STANDPIPE TO SAID ACUTE BEND WHILE IN A MIXTURE WITH AN AERATING GAS IN AN AMOUNT LIMITED TO MAINTAIN A RELATIVELY DENSE FLUIDIZED BODY OF SOILDS IN SAID STANDPIPE LEG;

CONTINUING THE PASSAGE OF SAID SOLID AROUND SAID ACUTE BEND AND UPWARDLY THROUGH SAID INCLINED RISER OF SUBSTANTIALLY GREATER LENGTH THAN SAID SLANTED RISER SECTION WHILE ADMITTING AERATING GAS TO SAID SOLIDS IN SAID BEND AND INCLINED RISER SECTION, THEREAFTER INATERMIXING ADDITIONAL GAS WITH SOLID;

PASSING THE INTERMIXTURE THROUGH A VERTICALLY DISPOSED RISER AND THEN INTO THE OTHER OF SAID VESSELS;

AND REGULATING THE AMOUNT OF GAS SO INTERMIXED AND ALSO REGULATING THE PRESSURE DRROP OVER SAID J-SHAPED CONDUIT BY MEANS OF A VALVE SO AS TO CONTROL THE RATE OF FLOW OF THE SOLID BETWEEN SAID VESSELS.