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Title: Method for using fast fluidized bed dry bottom coal gasification

Abstract

Carbonaceous solid material such as coal is gasified in a fast fluidized bed gasification system utilizing dual fluidized beds of hot char. The coal in particulate form is introduced along with oxygen-containing gas and steam into the fast fluidized bed gasification zone of a gasifier assembly wherein the upward superficial gas velocity exceeds about 5.0 ft/sec and temperature is 1500.degree.-1850.degree. F. The resulting effluent gas and substantial char are passed through a primary cyclone separator, from which char solids are returned to the fluidized bed. Gas from the primary cyclone separator is passed to a secondary cyclone separator, from which remaining fine char solids are returned through an injection nozzle together with additional steam and oxygen-containing gas to an oxidation zone located at the bottom of the gasifier, wherein the upward gas velocity ranges from about 3-15 ft/sec and is maintained at 1600.degree.-200.degree. F. temperature. This gasification arrangement provides for increased utilization of the secondary char material to produce higher overall carbon conversion and product yields in the process.

Inventors:
 [1];  [2]
  1. (Fords, NJ)
  2. (Lawrenceville, NJ)
Issue Date:
Research Org.:
HYDROCARBON RESEARCH INC
OSTI Identifier:
864676
Patent Number(s):
4400181
Assignee:
Hydrocarbon Research, Inc. (Lawrenceville, NJ) OSTI
DOE Contract Number:  
AC21-80MC14880
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; fast; fluidized; bed; dry; bottom; coal; gasification; carbonaceous; solid; material; gasified; utilizing; dual; beds; hot; char; particulate; form; introduced; oxygen-containing; gas; steam; zone; gasifier; assembly; upward; superficial; velocity; exceeds; temperature; 1500; degree; -1850; resulting; effluent; substantial; passed; primary; cyclone; separator; solids; returned; secondary; remaining; fine; injection; nozzle; additional; oxidation; located; ranges; 3-15; maintained; 1600; -200; arrangement; provides; increased; utilization; produce; overall; carbon; conversion; product; yields; process; product yields; carbonaceous solid; cyclone separator; gasification zone; bed gasification; fluidized beds; arrangement provides; oxygen-containing gas; fluidized bed; solid material; coal gasification; particulate form; containing gas; coal gas; effluent gas; gas velocity; zone located; injection nozzle; fast fluidized; hot char; gasification arrangement; secondary char; /48/

Citation Formats

Snell, George J., and Kydd, Paul H. Method for using fast fluidized bed dry bottom coal gasification. United States: N. p., 1983. Web.
Snell, George J., & Kydd, Paul H. Method for using fast fluidized bed dry bottom coal gasification. United States.
Snell, George J., and Kydd, Paul H. Sat . "Method for using fast fluidized bed dry bottom coal gasification". United States. https://www.osti.gov/servlets/purl/864676.
@article{osti_864676,
title = {Method for using fast fluidized bed dry bottom coal gasification},
author = {Snell, George J. and Kydd, Paul H.},
abstractNote = {Carbonaceous solid material such as coal is gasified in a fast fluidized bed gasification system utilizing dual fluidized beds of hot char. The coal in particulate form is introduced along with oxygen-containing gas and steam into the fast fluidized bed gasification zone of a gasifier assembly wherein the upward superficial gas velocity exceeds about 5.0 ft/sec and temperature is 1500.degree.-1850.degree. F. The resulting effluent gas and substantial char are passed through a primary cyclone separator, from which char solids are returned to the fluidized bed. Gas from the primary cyclone separator is passed to a secondary cyclone separator, from which remaining fine char solids are returned through an injection nozzle together with additional steam and oxygen-containing gas to an oxidation zone located at the bottom of the gasifier, wherein the upward gas velocity ranges from about 3-15 ft/sec and is maintained at 1600.degree.-200.degree. F. temperature. This gasification arrangement provides for increased utilization of the secondary char material to produce higher overall carbon conversion and product yields in the process.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

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