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Title: Regeneratively cooled coal combustor/gasifier with integral dry ash removal

Abstract

A coal combustor/gasifier is disclosed which produces a low or medium combustion gas for further combustion in modified oil or gas fired furnaces or boilers. Two concentric shells define a combustion volume within the inner shell and a plenum between them through which combustion air flows to provide regenerative cooling of the inner shell for dry ash operation. A fuel flow and a combustion air flow having opposed swirls are mixed and burned in a mixing-combustion portion of the combustion volume and the ash laden combustion products flow with a residual swirl into an ash separation region. The ash is cooled below the fusion temperature and is moved to the wall by centrifugal force where it is entrained in the cool wall boundary layer. The boundary layer is stabilized against ash re-entrainment as it is moved to an ash removal annulus by a flow of air from the plenum through slots in the inner shell, and by suction on an ash removal skimmer slot.

Inventors:
 [1]
  1. (Huntington, NY)
Issue Date:
Research Org.:
ASSOC UNIVERSITIES INC
OSTI Identifier:
864716
Patent Number(s):
4407205
Application Number:
06/373,582
Assignee:
Beaufrere, Albert H. (Huntington, NY) BNL
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
regeneratively; cooled; coal; combustor; gasifier; integral; dry; ash; removal; disclosed; produces; medium; combustion; gas; modified; oil; fired; furnaces; boilers; concentric; shells; define; volume; inner; shell; plenum; air; flows; provide; regenerative; cooling; operation; fuel; flow; opposed; swirls; mixed; burned; mixing-combustion; portion; laden; products; residual; swirl; separation; region; below; fusion; temperature; moved; wall; centrifugal; force; entrained; cool; boundary; layer; stabilized; re-entrainment; annulus; slots; suction; skimmer; slot; cooled below; air flows; centrifugal force; inner shell; combustion products; air flow; combustion air; combustion gas; boundary layer; ash removal; combustion product; fuel flow; separation region; gas fired; coal combustor; /110/60/

Citation Formats

Beaufrere, Albert H. Regeneratively cooled coal combustor/gasifier with integral dry ash removal. United States: N. p., 1983. Web.
Beaufrere, Albert H. Regeneratively cooled coal combustor/gasifier with integral dry ash removal. United States.
Beaufrere, Albert H. Tue . "Regeneratively cooled coal combustor/gasifier with integral dry ash removal". United States. https://www.osti.gov/servlets/purl/864716.
@article{osti_864716,
title = {Regeneratively cooled coal combustor/gasifier with integral dry ash removal},
author = {Beaufrere, Albert H.},
abstractNote = {A coal combustor/gasifier is disclosed which produces a low or medium combustion gas for further combustion in modified oil or gas fired furnaces or boilers. Two concentric shells define a combustion volume within the inner shell and a plenum between them through which combustion air flows to provide regenerative cooling of the inner shell for dry ash operation. A fuel flow and a combustion air flow having opposed swirls are mixed and burned in a mixing-combustion portion of the combustion volume and the ash laden combustion products flow with a residual swirl into an ash separation region. The ash is cooled below the fusion temperature and is moved to the wall by centrifugal force where it is entrained in the cool wall boundary layer. The boundary layer is stabilized against ash re-entrainment as it is moved to an ash removal annulus by a flow of air from the plenum through slots in the inner shell, and by suction on an ash removal skimmer slot.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {10}
}

Patent:

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