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Title: Process for clean-burning fuel from low-rank coal

A process for upgrading and stabilizing low-rank coal involving the sequential processing of the coal through three fluidized beds; first a dryer, then a pyrolyzer, and finally a cooler. The fluidizing gas for the cooler is the exit gas from the pyrolyzer with the addition of water for cooling. Overhead gas from pyrolyzing is likely burned to furnish the energy for the process. The product coal exits with a tar-like pitch sealant to enhance its safety during storage.
Inventors:
 [1];  [1];  [1]
  1. (Laramie, WY)
Issue Date:
OSTI Identifier:
869361
Assignee:
Western Research Institute (Laramie, WY) NETL
Patent Number(s):
US 5322530
Contract Number:
FC21-86MC11076
Research Org:
Western Research Institute (Laramie, WY)
Country of Publication:
United States
Language:
English
Subject:
process; clean-burning; fuel; low-rank; coal; upgrading; stabilizing; involving; sequential; processing; fluidized; beds; dryer; pyrolyzer; finally; cooler; fluidizing; gas; exit; addition; water; cooling; overhead; pyrolyzing; burned; furnish; energy; product; exits; tar-like; pitch; sealant; enhance; safety; storage; fluidizing gas; fluidized beds; fluidized bed; low-rank coal; rank coal; exit gas; overhead gas; /44/