Concise description
The hot-extractive analyzing system from SICK continuously measures SO3 in coal power plants and also reliably records H2SO4 concentrations in the lower ppm range.
Task
Sulfur trioxide is an undesirable flue gas component found in coal power plants. It forms visible gas trails in chimneys and potentially leads to corrosion in ductworks through conversion to other aggressive gases, such as sulfuric acid.
SO3 is formed in boilers and Catalytic Reduction (SCR) Systems. SO3 and H2SO4 vapors have to be removed from the flue gas stream and this usually happens by adding additives. A regulated quantity and a consequently effective cleaning are only possible when SO3 andH2SO4 concentrations in the flue gas are continuously recorded.
Quasi-continuous dew point measuring systems do not allow solid SO3 values. In order to ensure the SO3 loads reliably, a continuously working system must be used so that accurately recorded values of both SO3 and H2SO4 concentrations in the lower ppm range are available.
Implementation
Recommended: the continuous measurement
The MCS100E IR multi-component photometer from SICK with hot-extractive system technology is a proven analyzer for components such as HCl and NH3. A specially adapted spectral design of the photometer is required to record sulfur compounds SO2, SO3 and H2SO4. Calibration demands special technologies. SO3 is therefore not available as a test gas but is created through catalytic oxidation of SO2 and air. H2SO4 vapors are created using special non-corrosive vaporizers.
The analysis system continuously measures SO3 and H2SO4 concentrations and also records the common flue gas components of SO2, CO, NO, CO2, H2O and O2. Via continuous measurement and short reaction time, the MCS100E allows an effective control of SOx reducing measurements. The system is fitted with an integrated adjustment filter for routine sensitivity checks, which means that drift checks and adjustments can be made without test gas.
Customer benefits
Reliable process and emission data
| The MCS100E is the first IR photometer that can continuously records the SO3 concentration in flue gas. Accurate and instantaneous values are available for the process control |
| Hot extractive measuring technology combined with an integrated adjustment filter ensures stable long-term operation. Maintenance is reduced to a minimum |
| The MCS100E protects the plant against corrosion damage and reduces maintenance costs because the SO3 absorbent materials dosage is optimized. |
| Application | |||
| Industry: | Power | ||
| Challenge: | Process monitoring & control | ||
| Product group: | Analyzer systems | ||