The Use of By-product Coal as Fuel on Boiler Plants of Small and Medium Power

DOI

10.2991/coal-18.2018.61How to use a DOI?

Keywords

utilization of coal prepared waste, filter-cake, preparing, combustion of suspension coal-water fuel, structural and rheological characteristics

Abstract

A significant environmental problem for the coal regions of Russia is the presence of large volumes of fine-dispersed coal sludges formed during the operation of coal mines and coal-preparation plants. In addition to direct environmental damage, storage of these sludges in sedimentation tanks, hydro-dumps or on sludge sites requires significant economic costs. Thus, the solution of the utilization problem of coal-enrichment wastes, especially finely-dispersed, represented by filter cakes of filtration compartments, containing practically all chemical reagents used in coal washing (flocculants, coagulants, etc.) is topical. The paper presents the results of research on the use of fine coal-enrichment wastes as a fuel in boiler plants. It is shown that on the basis of these wastes it is possible to prepare a suspension water-coal fuel with a solid phase content of 56-60%, with the required structural-rheological characteristics and a net calorific value of up to 13 MJ / kg. A boiler with a thermal capacity of 0.63 MW with a vortex combustion system efficiently operating on fuel from coal waste was designed, manufactured and tested. The composition and effect of plasticizing additives on the rheological characteristics of the fuel is defined; the dependence of fuel consumption on its ash content is established. The results of the boiler operation on this fuel showed its high efficiency (the efficiency is 83-85%) with the level of harmful emissions in the flue gas significantly below the permissible values.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Murko Vasily Ivanovich
AU  - Hyamyalyainen Veniamin Anatolievich
AU  - Baranova Marina Petrovna
PY  - 2018/10
DA  - 2018/10
TI  - The Use of By-product Coal as Fuel on Boiler Plants of Small and Medium Power
BT  - Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)
PB  - Atlantis Press
SP  - 335
EP  - 338
SN  - 2352-5401
UR  - https://doi.org/10.2991/coal-18.2018.61
DO  - 10.2991/coal-18.2018.61
ID  - Ivanovich2018/10
ER  -