Emissivity and temperature determining of the steam boiler furnace gases at coal flaring

Аuthors

Kuzmin V. A., Zagrai . A.^*, Shmakova N. A.

Vyatka State University, Kirov, Russia

*e-mail: zagrayia@yandex.ru

Abstract

Computations of spectral emissivity of the furnace gases were performed for the conditions of the Kuznetsk coal flaring in the furnace of the BKZ-210-140F steam boiler. Theoretical dependencies of the emissivity on the temperature for the CO₂ absorption band (4.24 μm). Temperature registration of the furnace gases is performed at various heights of the boiler furnace with the pyrometer, perceiving emission in the CO₂ band. The experimental dependencies of measured temperatures on the emissivity set on the pyrometer within the interval of 0.5–1 were plotted. The “Temper” program developed by the authors allows determining temperature of the furnace gases by the CO2 absorption band in the BKZ-210-140F steam boiler while solid fuels birning (coal and turf).

Keywords:

emissivity factor, spectral pyrometer, furnace gases, steam boiler, flame combustion of coal

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