Publication: Preliminary investigation on the effects of primary airflow to coal particle distribution in coal-fired boilers
Date
2017
Authors
Noor N.A.W.M.
Hassan H.
Hashim M.F.
Hasini H.
Munisamy K.M.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Physics Publishing
Abstract
This paper presents an investigation on the effects of primary airflow to coal fineness in coal-fired boilers. In coal fired power plant, coal is pulverized in a pulverizer, and it is then transferred to boiler for combustion. Coal need to be ground to its desired size to obtain maximum combustion efficiency. Coarse coal particle size may lead to many performance problems such as formation of clinker. In this study, the effects of primary airflow to coal particles size and coal flow distribution were investigated by using isokinetic coal sampling and computational fluid dynamic (CFD) modelling. Four different primary airflows were tested and the effects to resulting coal fineness were recorded. Results show that the optimum coal fineness distribution is obtained at design primary airflow. Any reduction or increase of air flow rate results in undesirable coal fineness distribution. � Published under licence by IOP Publishing Ltd.
Description
Air; Boilers; Coal; Coal combustion; Combustion; Computational fluid dynamics; Fluid dynamics; Fluid mechanics; Fossil fuel power plants; Grinding mills; Particle size; Air flow-rate; CFD simulations; Coal particle size; Coal particles; Coal-fired power plant; Combustion efficiencies; Performance problems; primary airflow; Coal fired boilers