Fluidized bed calciner apparatus
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 »
- Inventors:
-
- West Richland, WA
- (Richland, WA)
- Richland, WA
- Issue Date:
- 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
- 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.
Owen, Thomas J, Klem, Jr., Michael J., & Cash, Robert J. Fluidized bed calciner apparatus. United States.
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.
@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}
}