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Title: Process for gasifying carbonaceous material from a recycled condensate slurry

Abstract

Coal or other carbonaceous material is gasified by reaction with steam and oxygen in a manner to minimize the problems of effluent water stream disposal. The condensate water from the product gas is recycled to slurry the coal feed and the amount of additional water or steam added for cooling or heating is minimized and preferably kept to a level of about that required to react with the carbonaceous material in the gasification reaction. The gasification is performed in a pressurized fluidized bed with the coal fed in a water slurry and preheated or vaporized by indirect heat exchange contact with product gas and recycled steam. The carbonaceous material is conveyed in a gas-solid mixture from bottom to top of the pressurized fluidized bed gasifier with the solids removed from the product gas and recycled steam in a supported moving bed filter of the resulting carbonaceous char. Steam is condensed from the product gas and the condensate recycled to form a slurry with the feed coal carbonaceous particles.

Inventors:
 [1];  [2]
  1. (Coraopolis, PA)
  2. (Pittsburgh, PA)
Issue Date:
OSTI Identifier:
863769
Patent Number(s):
4244706
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; gasifying; carbonaceous; material; recycled; condensate; slurry; coal; gasified; reaction; steam; oxygen; manner; minimize; effluent; water; stream; disposal; product; gas; feed; amount; additional; added; cooling; heating; minimized; preferably; kept; level; required; react; gasification; performed; pressurized; fluidized; bed; fed; preheated; vaporized; indirect; heat; exchange; contact; conveyed; gas-solid; mixture; bottom; top; gasifier; solids; removed; supported; moving; filter; resulting; char; condensed; form; particles; carbonaceous particles; moving bed; gasification reaction; water slurry; water stream; coal feed; pressurized fluidized; product gas; heat exchange; fluidized bed; carbonaceous material; pressurized fluid; feed coal; solid mixture; coal fed; gas-solid mixture; indirect heat; bed filter; bed gasifier; effluent water; direct heat; /48/201/252/

Citation Formats

Forney, Albert J., and Haynes, William P. Process for gasifying carbonaceous material from a recycled condensate slurry. United States: N. p., 1981. Web.
Forney, Albert J., & Haynes, William P. Process for gasifying carbonaceous material from a recycled condensate slurry. United States.
Forney, Albert J., and Haynes, William P. Thu . "Process for gasifying carbonaceous material from a recycled condensate slurry". United States. https://www.osti.gov/servlets/purl/863769.
@article{osti_863769,
title = {Process for gasifying carbonaceous material from a recycled condensate slurry},
author = {Forney, Albert J. and Haynes, William P.},
abstractNote = {Coal or other carbonaceous material is gasified by reaction with steam and oxygen in a manner to minimize the problems of effluent water stream disposal. The condensate water from the product gas is recycled to slurry the coal feed and the amount of additional water or steam added for cooling or heating is minimized and preferably kept to a level of about that required to react with the carbonaceous material in the gasification reaction. The gasification is performed in a pressurized fluidized bed with the coal fed in a water slurry and preheated or vaporized by indirect heat exchange contact with product gas and recycled steam. The carbonaceous material is conveyed in a gas-solid mixture from bottom to top of the pressurized fluidized bed gasifier with the solids removed from the product gas and recycled steam in a supported moving bed filter of the resulting carbonaceous char. Steam is condensed from the product gas and the condensate recycled to form a slurry with the feed coal carbonaceous particles.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

Patent:

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