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Title: Combustor with multistage internal vortices

Abstract

A fluidized bed combustor is provided with a multistage arrangement of vortex generators in the freeboard area. The vortex generators are provided by nozzle means which extend into the interior of the freeboard for forming vortices within the freeboard area to enhance the combustion of particulate material entrained in product gases ascending into the freeboard from the fluidized bed. Each of the nozzles are radially inwardly spaced from the combustor walls defining the freeboard to provide for the formation of an essentially vortex-free, vertically extending annulus about the vortices whereby the particulate material centrifuged from the vortices against the inner walls of the combustor is returned through the annulus to the fluidized bed. By adjusting the vortex pattern within the freeboard, a significant portion of the full cross-sectional area of the freeboard except for the peripheral annulus can be contacted with the turbulent vortical flow for removing the particulate material from the gaseous products and also for enhancing the combustion thereof within the freeboard.

Inventors:
 [1];  [2]
  1. (4524 Andes Dr., Fairfax, VA 22030)
  2. (114 Beechwood St., Morgantown, WV 26505)
Issue Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
867108
Patent Number(s):
4867079
Assignee:
Shang; Jer Y. (4524 Andes Dr., Fairfax, VA 22030); Harrington; Richard E. (114 Beechwood St., Morgantown, WV 26505) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
combustor; multistage; internal; vortices; fluidized; bed; provided; arrangement; vortex; generators; freeboard; nozzle; means; extend; interior; forming; enhance; combustion; particulate; material; entrained; product; gases; ascending; nozzles; radially; inwardly; spaced; walls; defining; provide; formation; essentially; vortex-free; vertically; extending; annulus; whereby; centrifuged; inner; returned; adjusting; pattern; significant; portion; cross-sectional; peripheral; contacted; turbulent; vortical; flow; removing; gaseous; products; enhancing; significant portion; walls defining; vertically extending; radially inward; radially inwardly; product gases; product gas; inner wall; particulate material; fluidized bed; gaseous product; bed combustor; gaseous products; inner walls; vortical flow; nozzle means; extending annulus; vortex generators; material entrained; /110/431/

Citation Formats

Shang, Jer Y., and Harrington, Richard E. Combustor with multistage internal vortices. United States: N. p., 1989. Web.
Shang, Jer Y., & Harrington, Richard E. Combustor with multistage internal vortices. United States.
Shang, Jer Y., and Harrington, Richard E. Sun . "Combustor with multistage internal vortices". United States. https://www.osti.gov/servlets/purl/867108.
@article{osti_867108,
title = {Combustor with multistage internal vortices},
author = {Shang, Jer Y. and Harrington, Richard E.},
abstractNote = {A fluidized bed combustor is provided with a multistage arrangement of vortex generators in the freeboard area. The vortex generators are provided by nozzle means which extend into the interior of the freeboard for forming vortices within the freeboard area to enhance the combustion of particulate material entrained in product gases ascending into the freeboard from the fluidized bed. Each of the nozzles are radially inwardly spaced from the combustor walls defining the freeboard to provide for the formation of an essentially vortex-free, vertically extending annulus about the vortices whereby the particulate material centrifuged from the vortices against the inner walls of the combustor is returned through the annulus to the fluidized bed. By adjusting the vortex pattern within the freeboard, a significant portion of the full cross-sectional area of the freeboard except for the peripheral annulus can be contacted with the turbulent vortical flow for removing the particulate material from the gaseous products and also for enhancing the combustion thereof within the freeboard.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Patent:

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