Abstract
AbstractCalculation studies have been carried out to improve the environmental safety of chimneys operation of regenerative-type glass furnaces by using recovery technologies of the waste heat of exhaust gases using water and air-heating heat exchangers and chimneys of various designs. In order to improve the environmental efficiency and operational reliability of chimneys, it is proposed using the thermal method of bypassing part of the exhaust gases from regenerators past the heat recovery equipment in heat recovery technologies. The effectiveness of this method for improving the dispersion in the surface layer of such harmful emissions of furnaces as sulfur dioxide, nitrogen oxides and dust when using the proposed heat recovery systems has been analyzed. It is established that the application of this method provides at the chimney orifice a relative increase in the temperature of gases by 1.13–1.16 times, and their velocity by 1.05–1.09 times for systems with air-heating heat recovery equipment and by 1.6–1.8 and 1.2–1.3 times respectively, when using water-heating heat recovery equipment. The maximum ground-level concentrations of Cm of these harmful emissions in the environment were determined. It is shown that the lower values of Cm correspond to higher ambient temperature, heat recovery systems with air-heating heat recovery equipment, chimneys with better heat insulation properties of the shell, most of the bypass of hot gases from the furnace regenerators past the heat recovery equipment. In this case, the efficiency of the impact of gas bypass method is higher for heat recovery systems with water-heating heat recovery equipment. The results obtained can be used in the development of energy-efficient technologies for gas-consuming heat plants of technological purposes.KeywordsIndustrial furnacesHeat recovery systemsChimneysHarmful emissions from glass furnacesGround-level concentrationEnvironmental efficiency
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