BIOFOS Lynetten is a Danish water treatment plant which incinerates its residual sludge. The pollutants to capture are mainly SO2 and some HCl in the presence of high moisture content in the gas. BIOFOS had some difficulties with their FGT process. Their set-up consists of a spray cooler, a Circulating Dry Scrubber (CDS) with conditioning drum including water injection and a wet scrubber at the end (caustic soda).
The wet scrubber is directly linked to the spray cooler. The reacted salt solution used in the dry process ending on the bag filters. Their CDS recirculation was not running and consequently most of the pollutants abatement happened in the wet scrubber.
Sorbacal® CDS is an innovative Lhoist Ca-based product specific to Circulating Dry Scrubber technology to improve process efficiency and reduce operating costs as well as maintenance costs for the customers.
Sorbacal® CDS demonstrates superior performance to standard hydrate products with improved flowability and double moisture handling capacity. The higher residue moisture content will boost the efficacy of acids gas removal and increase process reliability & flexibility.
The efficiency of Sorbacal® CDS allowed to reduce the injection of caustic soda in the wet scrubber. The main advantage of Sorbacal CDS on BIOFOS was the re-balance of the overall FGT system for reliable operation.