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Title: Apparatus for controlling fluidized beds

Abstract

An apparatus and process are disclosed for control and maintenance of fluidized beds under non-steady state conditions. An ash removal conduit is provided for removing solid particulates from a fluidized bed separate from an ash discharge conduit in the lower portion of the grate supporting such a bed. The apparatus and process of this invention is particularly suitable for use in ash agglomerating fluidized beds and provides control of the fluidized bed before ash agglomeration is initiated and during upset conditions resulting in stable, sinter-free fluidized bed maintenance. 2 figs.

Inventors:
;
Publication Date:
Research Org.:
City of Memphis
OSTI Identifier:
7260369
Patent Number(s):
US 4664678; A
Application Number:
PPN: US 6-777029
Assignee:
Inst. of Gas Technology, Chicago, IL (United States) CHO; EDB-94-121197
DOE Contract Number:
AC02-77ET13046
Resource Type:
Patent
Resource Relation:
Patent File Date: 17 Sep 1985
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CONTROL EQUIPMENT; DESIGN; FLUIDIZED BEDS; CONTROL; MAINTENANCE; MAINTENANCE FACILITIES; ASHES; MATERIALS RECOVERY; START-UP; TRANSIENTS; COMBUSTION PRODUCTS; EQUIPMENT; MANAGEMENT; PROCESSING; RESIDUES; WASTE MANAGEMENT; WASTE PROCESSING; 014000* - Coal, Lignite, & Peat- Combustion

Citation Formats

Rehmat, A.G., and Patel, J.G.. Apparatus for controlling fluidized beds. United States: N. p., 1987. Web.
Rehmat, A.G., & Patel, J.G.. Apparatus for controlling fluidized beds. United States.
Rehmat, A.G., and Patel, J.G.. 1987. "Apparatus for controlling fluidized beds". United States. doi:.
@article{osti_7260369,
title = {Apparatus for controlling fluidized beds},
author = {Rehmat, A.G. and Patel, J.G.},
abstractNote = {An apparatus and process are disclosed for control and maintenance of fluidized beds under non-steady state conditions. An ash removal conduit is provided for removing solid particulates from a fluidized bed separate from an ash discharge conduit in the lower portion of the grate supporting such a bed. The apparatus and process of this invention is particularly suitable for use in ash agglomerating fluidized beds and provides control of the fluidized bed before ash agglomeration is initiated and during upset conditions resulting in stable, sinter-free fluidized bed maintenance. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1987,
month = 5
}
  • An apparatus and process for control and maintenance of fluidized beds under non-steady state conditions. An ash removal conduit is provided for removing solid particulates from a fluidized bed separate from an ash discharge conduit in the lower portion of the grate supporting such a bed. The apparatus and process of this invention is particularly suitable for use in ash agglomerating fluidized beds and provides control of the fluidized bed before ash agglomeration is initiated and during upset conditions resulting in stable, sinter-free fluidized bed maintenance.
  • An apparatus and process for control and maintenance of fluidized beds under non-steady state conditions. An ash removal conduit is provided for removing solid particulates from a fluidized bed separate from an ash discharge conduit in the lower portion of the grate supporting such a bed. The apparatus and process of this invention is particularly suitable for use in ash agglomerating fluidized beds and provides control of the fluidized bed before ash agglomeration is initiated and during upset conditions resulting in stable, sinter-free fluidized bed maintenance.
  • An apparatus and process for control and maintenance of fluidized beds under non-steady state conditions. An ash removal conduit is provided for removing solid particulates from a fluidized bed separate from an ash discharge conduit in the lower portion of the grate supporting such a bed. The apparatus and process of this invention is particularly suitable for use in ash agglomerating fluidized beds and provides control of the fluidized bed before ash agglomeration is initiated and during upset conditions resulting in stable, sinter-free fluidized bed maintenance.
  • Method and apparatus are disclosed for producing a useful stream of hot gas from a fluidized bed combustor and controlling bed temperature by introducing cooling gas into the freeboard region of the combustor. The cooling gas is introduced by a plurality of inlet ports located within the combustion chamber or about its periphery. The cooling gas contacts particulate matter in the freeboard region, extracting heat therefrom. Cooled particulate matter either falls back into the bed or is returned to the bed from a separator downstream of the combustion chamber.
  • In a fluidized bed of solid particles having one or more heat exchange tubes immersed therein, the rate of heat transfer between the fluidized particles and a fluid flowing through the immersed heat exchange tubes is controlled by rotating an arcuate shield apparatus about each tube to selectively expose various portions of the tube to the fluidized particles.