The Effect of Modifiers and Method of Application on Fine-Coal Combustion

Wilhelm Jan Tic and Joanna Guziałowska-Tic
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Wilhelm Jan Tic: Department of Environmental Engineering, Opole University of Technology, 45-758 Opole, Poland
Joanna Guziałowska-Tic: Department of Environmental Engineering, Opole University of Technology, 45-758 Opole, Poland

Energies, 2019, vol. 12, issue 23, 1-15

Abstract: This research work presents the results of studies on the effect of modifiers comprising the salts CuSO 4 ·2H 2 O, NaCl, NH 4 Cl, MgSO 4 ·7H 2 O, CaCl 2 , and urea at various concentrations on the combustion of fine coal. The tests were carried out in a 12-kW laboratory boiler equipped with a rotary-grate retort furnace. The emission levels and concentrations of CO, CO 2 , SO 2 , NO x , and TOC in the flue gas were measured using analyzers. A modifier composed of 350 ppm Cu, Na, Mg, NH 4 + , Ca, and urea showed particularly high activity in the combustion of fine coal. The flue-gas levels of CO, NO x , and SO 2 were reduced by approximately 9%, 12%, and 10%, respectively, in comparison with the modifier-free sample. In this case, the boiler efficiency also increased from 65% in the tests with no modifier to 76% in the tests with the modifier. The proprietary application system, enabling the modifier to be added in exact amounts to the variable flow of fine coal, is also described. It was found that the use of the modifier in coal combustion tests results in lower emissions of harmful fuel components, a higher amount of heat obtained from the fuel unit mass, lower corrosive impact of the fuels, lower boiler maintenance costs, and extended service life.

Keywords: combustion modifier; combustion; efficiency; emission; fine coal (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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