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Dual-Alkali Desulfurization
The dual-alkali method (NaOH/Ca(OH)2) utilizes the high solubility of sodium salts in water. Sodium alkali is used inside the absorption tower to absorb sulfur dioxide. The desulfurization solution is then regenerated in a regeneration tank using inexpensive lime, allowing for the recycling of ...
Denitrification
The SNCR method primarily uses an amino-containing reducing agent, which is injected into the furnace at a temperature range of 900–1100°C to reduce NOx in the flue gas, producing nitrogen and water. Because, within a certain temperature range and in the presence of oxygen, the reduction of NOx by ...
Dust Removal In Non-ferrous Smelting
Non-ferrous metal smelting — copper, aluminum, zinc, lead, nickel, tin, and rare earth catalytic materials — produces some of the most challenging flue gas streams in industrial air pollution control. The dust generated contains heavy metals (Pb, Cu, Zn, As, Cd, Cr, Se) with particle sizes ranging ...
