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Title: Particle withdrawal from fluidized bed systems

Abstract

Method and apparatus for removing ash formed within, and accumulated at the lower portion of, a fluidized bed coal gasification reactor vessel. A supplemental fluidizing gas, at a temperature substantially less than the average fluidized bed combustion operating temperature, is injected into the vessel and upwardly through the ash so as to form a discrete thermal interface region between the fluidized bed and the ash. The elevation of the interface region, which rises with ash accumulation, is monitored by a thermocouple and interrelated with a motor controlled outlet valve. When the interface rises above the temperature indicator, the valve opens to allow removal of some of the ash, and the valve is closed, or positioned at a minimum setting, when the interface drops to an elevation below that of the thermocouple.

Inventors:
 [1];  [2];  [3]
  1. (Greensburg, PA)
  2. (Arlington Heights, IL)
  3. (Mt. Pleasant, PA)
Issue Date:
Research Org.:
Westinghouse Electric Corporation
OSTI Identifier:
864090
Patent Number(s):
4309194
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
DOE Contract Number:  
EF-77-C-01-1514
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
particle; withdrawal; fluidized; bed; systems; method; apparatus; removing; ash; formed; accumulated; portion; coal; gasification; reactor; vessel; supplemental; fluidizing; gas; temperature; substantially; average; combustion; operating; injected; upwardly; form; discrete; thermal; interface; region; elevation; rises; accumulation; monitored; thermocouple; interrelated; motor; controlled; outlet; valve; indicator; allow; removal; closed; positioned; minimum; setting; drops; below; outlet valve; fluidizing gas; gasification reactor; allow removal; interface region; temperature substantially; bed combustion; reactor vessel; fluidized bed; coal gasification; operating temperature; coal gas; bed coal; motor control; temperature indicator; bed systems; /48/110/414/422/

Citation Formats

Salvador, Louis A., Andermann, Ronald E., and Rath, Lawrence K. Particle withdrawal from fluidized bed systems. United States: N. p., 1982. Web.
Salvador, Louis A., Andermann, Ronald E., & Rath, Lawrence K. Particle withdrawal from fluidized bed systems. United States.
Salvador, Louis A., Andermann, Ronald E., and Rath, Lawrence K. Fri . "Particle withdrawal from fluidized bed systems". United States. https://www.osti.gov/servlets/purl/864090.
@article{osti_864090,
title = {Particle withdrawal from fluidized bed systems},
author = {Salvador, Louis A. and Andermann, Ronald E. and Rath, Lawrence K.},
abstractNote = {Method and apparatus for removing ash formed within, and accumulated at the lower portion of, a fluidized bed coal gasification reactor vessel. A supplemental fluidizing gas, at a temperature substantially less than the average fluidized bed combustion operating temperature, is injected into the vessel and upwardly through the ash so as to form a discrete thermal interface region between the fluidized bed and the ash. The elevation of the interface region, which rises with ash accumulation, is monitored by a thermocouple and interrelated with a motor controlled outlet valve. When the interface rises above the temperature indicator, the valve opens to allow removal of some of the ash, and the valve is closed, or positioned at a minimum setting, when the interface drops to an elevation below that of the thermocouple.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

Patent:

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