Methods for Defining the Binary Coal Mixture Composition
in the Pulverized Coal-Fired Boiler
Yevhen Pistun, Stepan Mysak, Halyna Matiko
Lviv Polytechnic National University, 12, S. Bandery str., Lviv, 79013, Ukraine
Received: February 14, 2017. Revised: March 16, 2017. Accepted: March 22, 2017
© 2017, The Authors. Published by Lviv Polytechnic National University
Abstract
The paper deals with the methods for defining the composition of the coal mixture burnt in boilers at combined heat and power plants. Indirect methods for defining the proportions of the two grades of coal in the mixture based on the available information on the quality characteristics of the coal are proposed. According to the first method the coal mixture composition is determined based on the values of volatile substances content in the combustible mass of the coal mixture and of each grade of coal making up the mixture. The second method uses the lower combustion heat of the coal mixture and lower combustion heats of the two grades of coal that the mixture consists of. The uncertainties of the results obtained by the developed methods are evaluated.
Keywords: methods; coal mixture; mixture composition; boiler; pulverized coal system; uncertainty.
Література – 10.