Staged fluidized-bed combustion and filter system
Abstract
A staged fluidized-bed combustion and filter system for substantially reducing the quantity of waste through the complete combustion into ash-type solids and gaseous products. The device has two fluidized-bed portions, the first primarily as a combustor/pyrolyzer bed, and the second as a combustor/filter bed. The two portions each have internal baffles to define stages so that material moving therein as fluidized beds travel in an extended route through those stages. Fluidization and movement is achieved by the introduction of gases into each stage through a directional nozzle. Gases produced in the combustor/pyrolyzer bed are permitted to travel into corresponding stages of the combustor/filter bed through screen filters that permit gas flow but inhibit solids flow. Any catalyst used in the combustor/filter bed is recycled. The two beds share a common wall to minimize total volume of the system. A slightly modified embodiment can be used for hot gas desulfurization and sorbent regeneration. Either side-by-side rectangular beds or concentric beds can be used. The system is particularly suited to the processing of radioactive and chemically hazardous waste.
- Inventors:
-
- Morgantown, WV
- Waynesburg, PA
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- OSTI Identifier:
- 869379
- Patent Number(s):
- 5325797
- 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 B01D - SEPARATION
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23G - CREMATION FURNACES
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- staged; fluidized-bed; combustion; filter; substantially; reducing; quantity; waste; complete; ash-type; solids; gaseous; products; device; portions; primarily; combustor; pyrolyzer; bed; internal; baffles; define; stages; material; moving; therein; fluidized; beds; travel; extended; route; fluidization; movement; achieved; introduction; gases; stage; directional; nozzle; produced; permitted; corresponding; screen; filters; permit; gas; flow; inhibit; catalyst; recycled; share; common; wall; minimize; total; volume; slightly; modified; embodiment; hot; desulfurization; sorbent; regeneration; side-by-side; rectangular; concentric; particularly; suited; processing; radioactive; chemically; hazardous; fluidized-bed combustion; filter bed; total volume; gas desulfurization; fluidized beds; bed combustion; particularly suited; hazardous waste; gas flow; fluidized bed; hot gas; gaseous product; gaseous products; solids flow; substantially reducing; complete combustion; sorbent regeneration; permit gas; gases produced; staged fluidized-bed; material moving; screen filter; type solid; staged fluidized; /110/122/422/588/
Citation Formats
Mei, Joseph S, and Halow, John S. Staged fluidized-bed combustion and filter system. United States: N. p., 1994.
Web.
Mei, Joseph S, & Halow, John S. Staged fluidized-bed combustion and filter system. United States.
Mei, Joseph S, and Halow, John S. Sat .
"Staged fluidized-bed combustion and filter system". United States. https://www.osti.gov/servlets/purl/869379.
@article{osti_869379,
title = {Staged fluidized-bed combustion and filter system},
author = {Mei, Joseph S and Halow, John S},
abstractNote = {A staged fluidized-bed combustion and filter system for substantially reducing the quantity of waste through the complete combustion into ash-type solids and gaseous products. The device has two fluidized-bed portions, the first primarily as a combustor/pyrolyzer bed, and the second as a combustor/filter bed. The two portions each have internal baffles to define stages so that material moving therein as fluidized beds travel in an extended route through those stages. Fluidization and movement is achieved by the introduction of gases into each stage through a directional nozzle. Gases produced in the combustor/pyrolyzer bed are permitted to travel into corresponding stages of the combustor/filter bed through screen filters that permit gas flow but inhibit solids flow. Any catalyst used in the combustor/filter bed is recycled. The two beds share a common wall to minimize total volume of the system. A slightly modified embodiment can be used for hot gas desulfurization and sorbent regeneration. Either side-by-side rectangular beds or concentric beds can be used. The system is particularly suited to the processing of radioactive and chemically hazardous waste.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}
Works referenced in this record:
Solids Circulation Between Adjacent Fluidized Beds Without Gas Mixing
book, January 1986
- Chong, Y-O; Nicklin, D. J.; Tait, P. J.
- Circulating Fluidized Bed Technology