The Main Regularities of Ignition and Combustion of Coal-Water Fuels Produced from Brown, Flame and Gas Coals-Reference-Cited by-同舟云学术

The Main Regularities of Ignition and Combustion of Coal-Water Fuels Produced from Brown, Flame and Gas Coals

Published:2018-08 Issue: Volume:37 Page:141-157
ISSN:1663-4144
Container-title:International Journal of Engineering Research in Africa
language:
Short-container-title:JERA

Author:

Pinchuk Valeriya¹^ORCID

Affiliation:

1. National Metallurgical Academy of Ukraine

Abstract

An experimental investigation was carried out of coal-water fuel (CWF) drops ignition and combustion. CWF examples were produced by using of coal of different metamorphic stages, including brown coal, flame coal, and gas coal. The processes of combustion and ignition of CWF took place in the air. Time-temperature dependences of ignition and combustion processes were obtained; basic stages of CWF combustion were established and investigated; combustion completeness was defined and ash residue structure and properties were investigated during the experimental research. Influence of the working medium temperature on the time duration of each burning stage was defined. Generalization of results was carried out. It is shown, that duration of the volatiles combustion stage doesn’t depend on the medium temperature and stay constant for each of coal grade. Time interval before CWF ignition can be described with power-type dependence, which is identical for all metamorphic stages of coal. The maximum temperature of CWF combustion grows linearly in respect to the medium temperature in the oven.

Publisher

Trans Tech Publications, Ltd.

Link

https://www.scientific.net/JERA.37.141.pdf

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