Study on macro-petrographic classification and combustion characteristics of pulverized coal

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:324638

Fan, H; Xu, X; Wang, S ^[1]

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1. Tsinghua Univ. (China). Dept. of Thermal Engineering

Macro-petrographical compositions of pulverized coal (PC) have a strong effect on its combustion characteristics. In this paper, according to the difference of burn-out performance, Chinese Yangquan anthracite, Xishan lean coal and Shenmu bituminous coal were separated into clarite, durite and inorganic matter and then the micro-petrographical, proximate and ultimate analyses were made for each part. The combustion kinetic parameters of the clarite and durite of the coals were tested and they are quite different for each coal type. This classification of pulverized coal into clarite, durite and inorganic matter is closer to real engineering conditions of combustion, and it will be helpful to study PC burnout performance. A numerical method was used to precisely calculate the velocity and temperature distribution of gas and the residence time of PC char particle in a Drop Tube Furnace (DTF), and all these were checked by experiments. The combustion kinetic parameters of Yangquan clarite and durite chars were given by the DTF experiment.

• OSTI ID: 324638
• Report Number(s): CONF-970931--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ANTHRACITE
BITUMINOUS COAL
COMBUSTION KINETICS
COMBUSTION PROPERTIES
LITHOTYPES
PETROGRAPHY
PULVERIZED FUELS
SEPARATION PROCESSES