Abstract: A pilot test platform was established in the municipal solid waste incineration power plant, and the effects of sodium bicarbonate flue residence time, excess coefficient and dust collector pressure difference on the removal of HCl and SO₂ in the flue gas by fine sodium bicarbonate powder were investigated at the reaction temperature of 145-205 ℃, and the deacidification effect of sodium bicarbonate was compared with that of ordinary slaked lime and high-specific surface area slaked lime. The results showed that the overall efficiency of chlorine removal by sodium bicarbonate was higher than that of desulfurization. Increasing the reaction temperature, extending the residence time or raising the pressure drop across the dust collector all contribute to reducing the excess coefficient of sodium bicarbonate and improving the overall deacidification efficiency, with a particularly notable impact on SO₂ removal. However, the optimization of the operation would lead to a corresponding increase in operating costs, an economic assessment was required.

Key words: NaHCO₃, municipal solid waste incineration flue gas, dry deacidification, deacidification efficiency