Fluidized bed calciner apparatus

Title: Fluidized bed calciner apparatus

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Abstract

An apparatus for remotely calcining a slurry or solution feed stream of toxic or hazardous material, such as ammonium diurante slurry or uranyl nitrate solution, is disclosed. The calcining apparatus includes a vertical substantially cylindrical inner shell disposed in a vertical substantially cylindrical outer shell, in which inner shell is disposed a fluidized bed comprising the feed stream material to be calcined and spherical beads to aid in heat transfer. Extending through the outer and inner shells is a feed nozzle for delivering feed material or a cleaning chemical to the beads. Disposed in and extending across the lower portion of the inner shell and upstream of the fluidized bed is a support member for supporting the fluidized bed, the support member having uniform slots for directing uniform gas flow to the fluidized bed from a fluidizing gas orifice disposed upstream of the support member. Disposed in the lower portion of the inner shell are a plurality of internal electric resistance heaters for heating the fluidized bed. Disposed circumferentially about the outside length of the inner shell are a plurality of external heaters for heating the inner shell thereby heating the fluidized bed. Further, connected to the internal and externalmore »« less

Inventors:

Owen, Thomas J ^[1]; Klem, Jr., Michael J. ^[2]; Cash, Robert J ^[3]

West Richland, WA
(Richland, WA)
Richland, WA

Issue Date:: 1988-01-01

Research Org.:: WESTINGHOUSE HANFORD CO

OSTI Identifier:: 866638

Patent Number(s):: 4755138

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
B01J2208/00415 - electric resistance heaters
B01J8/1827 - {the fluidising gas being a reactant}

G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
G21F9/14 - by incineration

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
B01J2208/00407 - outside the reactor bed
B01J8/44 - Fluidisation grids
B01J8/1836 - {Heating and cooling the reactor

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DOE Contract Number:: AC06-76FF02170

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: fluidized; bed; calciner; apparatus; remotely; calcining; slurry; solution; feed; stream; toxic; hazardous; material; ammonium; diurante; uranyl; nitrate; disclosed; vertical; substantially; cylindrical; inner; shell; disposed; outer; comprising; calcined; spherical; beads; heat; transfer; extending; shells; nozzle; delivering; cleaning; chemical; portion; upstream; support; supporting; uniform; slots; directing; gas; flow; fluidizing; orifice; plurality; internal; electric; resistance; heaters; heating; circumferentially; outside; length; external; connected; means; maintaining; temperature; plus; minus; approximately; 25; degree; predetermined; providing; radiative; reflection; radiative heat; bed temperature; nitrate solution; uranyl nitrate; external heat; fluidizing gas; cylindrical outer; hazardous material; inner shell; outer shell; feed material; gas flow; fluidized bed; heat transfer; feed stream; substantially cylindrical; spherical beads; electric resistance; solution feed; cylindrical inner; disposed circumferentially; feed nozzle; resistance heat; resistance heater; /432/110/976/

Citation Formats


                    Owen, Thomas J, Klem, Jr., Michael J., and Cash, Robert J. Fluidized bed calciner apparatus.  United States: N. p., 1988. 
        Web.

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                    Owen, Thomas J, Klem, Jr., Michael J., & Cash, Robert J. Fluidized bed calciner apparatus.  United States.

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                    Owen, Thomas J, Klem, Jr., Michael J., and Cash, Robert J. Fri .  
        "Fluidized bed calciner apparatus".  United States.  https://www.osti.gov/servlets/purl/866638.

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@article{osti_866638,

  title        = {Fluidized bed calciner apparatus},

  author       = {Owen, Thomas J and Klem, Jr., Michael J. and Cash, Robert J},

  abstractNote = {An apparatus for remotely calcining a slurry or solution feed stream of toxic or hazardous material, such as ammonium diurante slurry or uranyl nitrate solution, is disclosed. The calcining apparatus includes a vertical substantially cylindrical inner shell disposed in a vertical substantially cylindrical outer shell, in which inner shell is disposed a fluidized bed comprising the feed stream material to be calcined and spherical beads to aid in heat transfer. Extending through the outer and inner shells is a feed nozzle for delivering feed material or a cleaning chemical to the beads. Disposed in and extending across the lower portion of the inner shell and upstream of the fluidized bed is a support member for supporting the fluidized bed, the support member having uniform slots for directing uniform gas flow to the fluidized bed from a fluidizing gas orifice disposed upstream of the support member. Disposed in the lower portion of the inner shell are a plurality of internal electric resistance heaters for heating the fluidized bed. Disposed circumferentially about the outside length of the inner shell are a plurality of external heaters for heating the inner shell thereby heating the fluidized bed. Further, connected to the internal and external heaters is a means for maintaining the fluidized bed temperature to within plus or minus approximately 25.degree. C. of a predetermined bed temperature. Disposed about the external heaters is the outer shell for providing radiative heat reflection back to the inner shell.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1988},

  month        = {1}

}

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