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Title: Dual-water mixture fuel burner

Abstract

A coal-water mixture (CWM) burner includes a conically shaped rotating cup into which fuel comprised of coal particles suspended in a slurry is introduced via a first, elongated inner tube coupled to a narrow first end portion of the cup. A second, elongated outer tube is coaxially positioned about the first tube and delivers steam to the narrow first end of the cup. The fuel delivery end of the inner first tube is provided with a helical slot on its lateral surface for directing the CWM onto the inner surface of the rotating cup in the form of a uniform, thin sheet which, under the influence of the cup's centrifugal force, flows toward a second, open, expanded end portion of the rotating cup positioned immediately adjacent to a combustion chamber. The steam delivered to the rotating cup wets its inner surface and inhibits the coal within the CWM from adhering to the rotating cup. A primary air source directs a high velocity air flow coaxially about the expanded discharge end of the rotating cup for applying a shear force to the CWM in atomizing the fuel mixture for improved combustion. A secondary air source directs secondary air into the combustionmore » chamber adjacent to the outlet of the rotating cup at a desired pitch angle relative to the fuel mixture/steam flow to promote recirculation of hot combustion gases within the ignition zone for increased flame stability.« less

Inventors:
 [1];  [2];  [3]
  1. Finleyville, PA
  2. Pittsburgh, PA
  3. Library, PA
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
865941
Patent Number(s):
US 4604052
Application Number:
06/728,358
Assignee:
United States of America as represented by United States (Washington, DC)
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
dual-water; mixture; fuel; burner; coal-water; cwm; conically; shaped; rotating; cup; comprised; coal; particles; suspended; slurry; introduced; via; elongated; inner; tube; coupled; narrow; portion; outer; coaxially; positioned; delivers; steam; delivery; provided; helical; slot; lateral; surface; directing; form; uniform; sheet; influence; centrifugal; force; flows; expanded; immediately; adjacent; combustion; chamber; delivered; wets; inhibits; adhering; primary; air; source; directs; velocity; flow; discharge; applying; shear; atomizing; improved; secondary; outlet; desired; pitch; angle; relative; promote; recirculation; hot; gases; ignition; zone; increased; flame; stability; particles suspended; coal particle; angle relative; air source; fuel delivery; water mixture; fuel burner; hot combustion; centrifugal force; inner tube; combustion chamber; inner surface; combustion gases; air flow; coal particles; secondary air; outer tube; combustion gas; fuel mixture; rotating cup; primary air; steam flow; immediately adjacent; tube coupled; positioned immediately; source directs; improved combustion; coaxially positioned; chamber adjacent; lateral surface; conically shaped; shear force; elongated inner; desired pit; elongated outer; coal-water mixture; coaxially position; /431/110/239/

Citation Formats

Brown, Thomas D, Reehl, Douglas P, and Walbert, Gary F. Dual-water mixture fuel burner. United States: N. p., 1986. Web.
Brown, Thomas D, Reehl, Douglas P, & Walbert, Gary F. Dual-water mixture fuel burner. United States.
Brown, Thomas D, Reehl, Douglas P, and Walbert, Gary F. Tue . "Dual-water mixture fuel burner". United States. https://www.osti.gov/servlets/purl/865941.
@article{osti_865941,
title = {Dual-water mixture fuel burner},
author = {Brown, Thomas D and Reehl, Douglas P and Walbert, Gary F},
abstractNote = {A coal-water mixture (CWM) burner includes a conically shaped rotating cup into which fuel comprised of coal particles suspended in a slurry is introduced via a first, elongated inner tube coupled to a narrow first end portion of the cup. A second, elongated outer tube is coaxially positioned about the first tube and delivers steam to the narrow first end of the cup. The fuel delivery end of the inner first tube is provided with a helical slot on its lateral surface for directing the CWM onto the inner surface of the rotating cup in the form of a uniform, thin sheet which, under the influence of the cup's centrifugal force, flows toward a second, open, expanded end portion of the rotating cup positioned immediately adjacent to a combustion chamber. The steam delivered to the rotating cup wets its inner surface and inhibits the coal within the CWM from adhering to the rotating cup. A primary air source directs a high velocity air flow coaxially about the expanded discharge end of the rotating cup for applying a shear force to the CWM in atomizing the fuel mixture for improved combustion. A secondary air source directs secondary air into the combustion chamber adjacent to the outlet of the rotating cup at a desired pitch angle relative to the fuel mixture/steam flow to promote recirculation of hot combustion gases within the ignition zone for increased flame stability.},
doi = {},
url = {https://www.osti.gov/biblio/865941}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {8}
}

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