Circulating Dry Scrubber (CDS)

CDS systems remove acidic gases by recirculating a mixture of partially reacted sorbent and fly ash to maximize contact with the flue gas. Solids captured in the filter are returned to the reactor, increasing reagent utilization. Water can be added to control temperature, and improve removal performance. This enhances gas‑solid interaction, significantly improving treatment performance while reducing overall sorbent consumption. 

Key benefits 

• Effective removal of SO₂, SO₃, HF, and HCl 
• Reduced sorbent consumption through recirculation 
• Less capital‑intensive than wet technologies 
• Multi‑pollutant capability, when combined with activated carbon 

Best-fit applications 

Coal, biomass and waste‑to‑energy boilers, or any installation seeking high performance with optimized operating costs. 

Lhoist provides a complete product portfolio designed to enhance CDS efficiency and reduce operating costs. Our Sorbacal^® CDS grade handles more than twice the moisture of standard hydrates, improving residue flowability, and improving overall CDS performance. Our full range of products includes:

• Sorbacal^® CDS
• Sorbacal^® SPS
• Sorbacal^® Micro
• Sorbacal^® SP
• Sorbacal^® H
• Sorbacal^® Q