Dry Flue Gas Desulfurization
Ø Technical Features
l In dry flue gas desulfurization, the desulfurizing agent is NaHCO₃ or Ca(OH)₂, achieving a desulfurization efficiency of over 95%.
l The desulfurizing agent is evenly distributed and its dosage is easy to control.
l The desulfurizing agent offers a high utilization rate.
l Stable operation.
Ø Technical Advantages
l The chimney exhaust is free of plume (smoke trail).
l No chimney anticorrosion treatment is required.
l There is no desulfurization wastewater generated, unlike in wet FGD.
l There is no secondary pollution from aerosols.
Semi-Dry Flue Gas Desulfurization Technology
Ø Technical Characteristics:
With Ca(OH)₂ as the desulfurizing agent, the desulfurization ash is circulated and humidified to establish favorable desulfurization conditions. The process achieves a high desulfurizing-agent utilization rate, with no slurry preparation system and no clogging.
Ø Technical Advantages:
l The desulfurization ash is recycled to improve desulfurization efficiency and desulfurizing-agent utilization.
l No slurry preparation system, no clogging, and no secondary pollutants.
l Integrated desulfurization and dust removal, with low operating costs.
l Integrating lime slaking with ash recirculation and humidification minimizes equipment caking.
