CEM India CEM India

CEM India - Abstract

 
CEM India

 
CEM India



Abstract Title: Gas Sampling & Conditioning for challenging Pollutants and Conditions
Session Choice: Continuous Emission Monitoring
Presenter Name: Mr Roland Zepeck
Company/Organisation: JCT Analysentechnik GmbH
Country: Austria

Abstract Information :

Mercury (Total Hg or Speciation-Hg), Ammonia (NH3) and Nitrogen Oxides (NOx) after DeNOx-Scrubbers, Particulates and Gaseous Pollutants after Wet FGD (Flue Gas Desulphurisation): More and more Pollutants are added, especially also in India, to the list of Pollutants to be monitored continuously in Emissions, and this in often not simple matrixes. Influences from the Stack Gas Matrix (moisture, condensation, reactive components) plus unwanted secondary reactions in the sampling systems on the way to the analyzers complicate the Continuous Emission Monitoring Systems (CEMS) and influence the accuracy of the measurements. These effects not only challenge the analyzers, but in many ways the Sampling and Conditioning Systems for extractive CEMS. The Sampling and Sample Conditioning Systems highly influence the overall accuracy of CEMS and the operational stability of the analyzers. Special care has to be taken in the design of the Sampling and Conditioning Systems for automatic CEMS analyzers, specifically for these challenging pollutants and challenging stack gas matrixes to avoid changes in the sample gas and resulting incorrect measurements and increased maintenance requirements. The paper describes simple but effective solutions for sampling systems for continuous Total Mercury and Speciation-Mercury Analyzers, High-Temperature Sampling Systems for Ammonia and Nitrogen Oxides Analyzers as well as Boiler-Outlet CO Monitors, specifically in the presence of very high dust concentration, as well as continuous sampling systems for wet stack situations (stack gas below the dew point). Design features and examples for practical experiences (case studies) will be shown and discussed.