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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 areas 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. 2 figs.

Inventors:
;
Issue Date:
Research Org.:
USDOE Morgantown Energy Technology Center (METC), WV (United States)
OSTI Identifier:
6162534
Patent Number(s):
7044697
Application Number:
ON: DE89011780
Assignee:
Dept. of Energy
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
B - PERFORMING OPERATIONS B23 - MACHINE TOOLS B23B - TURNING
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 42 ENGINEERING; FLUIDIZED-BED COMBUSTORS; DESIGN; COAL; INVENTIONS; NOZZLES; VORTICES; CARBONACEOUS MATERIALS; COMBUSTORS; ENERGY SOURCES; FOSSIL FUELS; FUELS; MATERIALS; 014000* - Coal, Lignite, & Peat- Combustion; 421000 - Engineering- Combustion Systems

Citation Formats

Shang, Jer Yu, and Harrington, R. E. Combustor with multistage internal vortices. United States: N. p., 1987. Web.
Shang, Jer Yu, & Harrington, R. E. Combustor with multistage internal vortices. United States.
Shang, Jer Yu, and Harrington, R. E. Fri . "Combustor with multistage internal vortices". United States. https://www.osti.gov/servlets/purl/6162534.
@article{osti_6162534,
title = {Combustor with multistage internal vortices},
author = {Shang, Jer Yu and Harrington, R. 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 areas 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. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {5}
}