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Thermal dewatering of lignite: Phase III - final report

Abstract

Phase III of this project extended the investigation of thermal dewatering on several lignite and peat samples at the temperature range up to 400 degrees C and investigated variables such as retention time, increased rates of heating and cooling, extent of trace element removal, effect of particle size and effect of dewatering under heavy and light oils. Lignites from three areas of Canada (Estevan and Coronach, Saskatchewan, and Onakawana, Ontario) and one peat sample (Garrick, Saskatchewan) were thermally dewatered. The equilibrium moisture values obtained for the dewatered products were as low as, or lower than those obtained in Phases I and II of this project (350 degrees C). However, the measured moisture contents of the thermally dewatered Saskatchewan lignites were somewhat higher than those measured in Phases I and II. The equilibrium moisture values and the moisture contents decreased with increasing temperature. An optimum balance between extent of dewatering and resulting steam pressures is obtained for a dewatering temperature between 300 and 350 degrees C. At these temperatures, residence times in the order of 15 minutes are required. (35 refs.)
Publication Date:
Jan 01, 1981
Product Type:
Book
Reference Number:
EDB-86-014102
Subject:
01 COAL, LIGNITE, AND PEAT; LIGNITE; DEMINERALIZATION; WATER REMOVAL; PEAT; BROWN COAL; CANADA; ELEMENTS; HIGH TEMPERATURE; MEDIUM PRESSURE; MOISTURE; ONTARIO; PARTICLE SIZE; SASKATCHEWAN; TEMPERATURE EFFECTS; TIME DEPENDENCE; TRACE AMOUNTS; CARBONACEOUS MATERIALS; COAL; ENERGY SOURCES; FOSSIL FUELS; FUELS; MATERIALS; NORTH AMERICA; ORGANIC MATTER; REMOVAL; SEPARATION PROCESSES; SIZE; 013000* - Coal, Lignite, & Peat- Transport, Handling, & Storage
OSTI ID:
6161808
Country of Origin:
Canada
Language:
English
Submitting Site:
HEDB
Size:
Pages: 159
Announcement Date:

Citation Formats

Champagne, P J, Szladow, A J, and Kybett, B D. Thermal dewatering of lignite: Phase III - final report. Canada: N. p., 1981. Web.
Champagne, P J, Szladow, A J, & Kybett, B D. Thermal dewatering of lignite: Phase III - final report. Canada.
Champagne, P J, Szladow, A J, and Kybett, B D. 1981. "Thermal dewatering of lignite: Phase III - final report." Canada.
@misc{etde_6161808,
title = {Thermal dewatering of lignite: Phase III - final report}
author = {Champagne, P J, Szladow, A J, and Kybett, B D}
abstractNote = {Phase III of this project extended the investigation of thermal dewatering on several lignite and peat samples at the temperature range up to 400 degrees C and investigated variables such as retention time, increased rates of heating and cooling, extent of trace element removal, effect of particle size and effect of dewatering under heavy and light oils. Lignites from three areas of Canada (Estevan and Coronach, Saskatchewan, and Onakawana, Ontario) and one peat sample (Garrick, Saskatchewan) were thermally dewatered. The equilibrium moisture values obtained for the dewatered products were as low as, or lower than those obtained in Phases I and II of this project (350 degrees C). However, the measured moisture contents of the thermally dewatered Saskatchewan lignites were somewhat higher than those measured in Phases I and II. The equilibrium moisture values and the moisture contents decreased with increasing temperature. An optimum balance between extent of dewatering and resulting steam pressures is obtained for a dewatering temperature between 300 and 350 degrees C. At these temperatures, residence times in the order of 15 minutes are required. (35 refs.)}
place = {Canada}
year = {1981}
month = {Jan}
}