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The HCL, SO2 Absorption Efficiency in a Dry Scrubber Process. (RAW GAS)
HCL, SO2 Absorption Efficiency:
In order to achieve the optimum efficiency of an absorber, precise control of the entire process is required. This control begins with fuel mixing and extends to the measurements that provide crucial feedback for regulation. For instance, burning fuel in Waste to Energy plants and Biomass plants produces HCl and SO2 in the flue gas, which are subsequently removed in an abatement section. The dosage of sorbent is then optimized based on the actual measurement of the concentrations of HCl and SO2 gases upstream of the absorber.
Furthermore, in Waste to Energy plants, fuel can be mixed in a manner that results in the combustion generating HCl in the flue gas at concentration levels that enhance SO2 absorption in a scrubber. This method ultimately leads to higher overall efficiency of the absorber.
Additionally, the CODEL GCEM 40 in-situ analyzer, which measures SO2, HCl, NO, CO, CO2, and H2O, is gaining increased attention as a suitable instrument for measuring acidic gases upstream of the absorber. Many Waste to Energy and Biomass plants across Europe, including those in Finland, Germany, the UK, Lithuania, Serbia, France, the Czech Republic, and Poland, are already using it for process control.
Key advantages that have been appreciated by customers in this application are:
- Reliability in harsh raw gas environment
- Low maintenance and cost of ownership
- In-situ method measurement on wet basis
- Representative measurement that is not prone to sample dilution or acid gases loss.
- Combined SO2, HCL, H2O, temperature, pressure measurements in single analyser for optimum accuracy.
Recently Commissioned:
At the end of October 2022 a Codel engineer successfully commissioned another GCEM 40 SO2, HCL, H2O, CO2 on scrubber inlet application. This was in Finland in one of the many paper factories in this country, on a BFB boiler that burns mixed fuels, bark, clean recycled wood, sludge, and SRF (Solid Recovered Fuel).