Improving the environmental performance of heat generators in autonomous heat supply systems

Purpose of research. The article discusses an innovative method for improving the environmental performance of heat generators in autonomous heat supply systems based on the use of granular blast furnace slag as an adsorbent to remove harmful substances from flue gases, namely nitrogen and carbon oxides. The results of experiments confirming the effectiveness of this method are presented.

Methods. The study examines the operation of a pilot plant with the calculation of its effectiveness. To do this, we used the data obtained during experiments on this installation, which was installed on a chimney in order to purify flue gases from harmful gases (nitrogen and carbon oxides).

Results. The developed pilot plant makes it possible to reduce the content of nitrogen oxides in exhaust and flue gases into the atmosphere by 50-55%, and it was also possible to reduce the concentration of carbon oxides by 27,7%. The reduction of carbon oxides in emissions ranges from 16,7 to 26,7%. Blast furnace slag with granules from 5 to 10 mm in size was used during the operation of the installation. The unit effectively cleans flue and exhaust gases for 720 hours between blast furnace slag regeneration cycles, which requires up to 52,5 liters of water.

Conclusion. Pilot-industrial flue gas purification plant for heat generators of residential heating systems using adsorption purification and granular blast furnace slag as an adsorbent is an effective method of managing environmental parameters. It reduces the content of harmful components in flue gases, including nitrogen oxides (NO_x), including NO), carbon monoxide (CO) and carbon dioxide (CO₂). The method makes it possible to control the environmental parameters of heat generators, eliminate the need for condensate removal and disposal, and improve the technical, economic and environmental parameters of the heat generating system for apartment-by-apartment heat supply.

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