Experimental Study of Simultaneous Flue Gas Desulfurization and Denitrification by New-Style Complex Absorbent

A new-style complex absorbent was prepared for simultaneous desulfurization and denitrification in this paper. The performance of the absorbent was tested in fixed bed. On the basis of the experimental results in fixed bed, the M substances were selected as the optimal additive. Furthermore the effects of various factors, such as additive content, flue gas temperature, humidity, Ca/(S+N), and NO_x inlet concentration et al, on the removal efficiencies of SO₂ and NO_x were investigated. According to our simultaneous flue gas desulfurization and denitrification experiment results using the new-style absorbent in a circulating fluidized bed (CFB) system, High simultaneous removal efficiency, 94.9% of SO₂ and 68.3% of NO, was achieved under the optimal experimental conditions. The work would offer important basic data for industrial application of simultaneous removal SO₂ and NO_x based on flue gas circulating fluidized bed.