Reduction of Nitrous Oxide Emissions of the Boiler E-135-3,2-420 DG During Combustion of the Gaseous Oil Shale Processing Products

Resumo

The technological and constructive measures implemented on the boiler E-135-3,2-420 DG are provided, which allow reducing the formation of nitrous oxides during combustion of the gaseous oil shale processing products. By reducing the volumetric heat release rate of the furnace, employing special burners, arranging for a staged combustion and recirculating flue gases, it became possible to ensure stable fuel burning throughout the entire operating range of the boiler with a nitrous oxide concentration in flue gases of less than 100 mg/m³ (at O₂ = 3%). Incomplete combustion was practically eliminated.