Preignition volatile yield as related to coal characteristics. Quarterly report, January 1981-March 1981

Technical Report · Wed Apr 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6609194· OSTI ID:6609194

The objectives of this work is to determine the total release of volatile material from a variety of coals under high heating rates and high temperature and to study the effects of enhanced volatile matter release on the design of pulverized coal combustion systems. Four coals have been approved for investigation and are currently being characterized and tested. Shakdown runs with the new reactor were completed and the results showed that the new design did improve the operability of the experimental set-up. Work on correlation of test data and coal characteristics has begun. Initial correlation shows that the measured range of carbon conversions of between 40 and 85% is a function of temperature, rank and carbon content. The AERL coal combustion model has been modified to allow staged mixing of the secondary air with the primary mixture of coal, air and recirculated gases. This modification will allow exploration of the effect of preignition volatile yields on flame stability. We will also be able to project: (1) the optimum primary air fraction as a function of volatile yield (this will then allow the development of a relationship between burner thruput and burner diameter); and (2) the optimum point of secondary air injection as a function of volatile yield to achieve flame stability.

• Research Organization: Avco-Everett Research Lab., Inc., Everett, MA (USA)
• DOE Contract Number: AC22-80PC30290
• OSTI ID: 6609194
• Report Number(s): DOE/PC/30290-T2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
30 DIRECT ENERGY CONVERSION
300100 -- Direct Energy Conversion-- MHD Generators
CARBONACEOUS MATERIALS
COAL
COMBUSTORS
DESIGN
DEVOLATILIZATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HEATING RATE
MATERIALS
MATTER
VOLATILE MATTER