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Advanced solutions for gas monitoring

Gasmet Technologies Oy
Numerous power plants, waste incineration units, and cement kilns worldwide use Gasmet™ gas monitoring systems to measure their stack emissions – and many others also use the company’s rugged portable analyzers.

Much of the success of Gasmet™ gas analyzers can be attributed to the fact that they are based on state-of-the-art measurement techniques, such as FTIR (Fourier Transform Infrared) spectroscopy, which is the most advanced technology available today for continuous gas analysis. FTIR enables dozens of different organic and inorganic compounds to be monitored very accurately within seconds, even at concentrations of only parts per billion (ppb).

Gasmet™ analyzers are typically used to monitor CO2, CO , SO2, NOx, N2O, NH3, CH4, HCI, HF, NH3, VOCs, and other potentially harmful substances. In addition to speed, multicomponent analysis capability, and class-leading sensitivity, Gasmet™ FTIR gas analyzers also offer excellent specificity and simple calibration.

A comprehensive solution

The Gasmet™ CEMS system is an ideal choice for waste incineration plants, cement kilns, power plants, brick and glassworks, and smelters.
Operators of waste incinerators, cement kilns, and similar facilities that need to monitor their emissions and processes on a continuous basis can really benefit from a Gasmet™ CEMS system.

Units are designed on a modular basis and typically comprise a Gasmet™ CX4000 FTIR gas analyzer, a heated sampling unit, an industrial PC, and a ZrO2-oxygen analyzer – all of which are installed in an air-conditioned cabinet with pullout shelves for easy accessibility and service.

The CX4000 enables up to 50 compounds to be measured simultaneously, and can be supplemented with optional O2 and FID analyzers where needed. All parts that come into contact with the sample gas are heated to 180 °C, eliminating the need for a sample dilution or water vapour removal system.

The system is controlled with Gasmet’s Calcmet™ software, which uses sophisticated algorithms to analyse the sample spectrum and automatically takes account of cross-interference from other gases in the settings used for each compound. As the water content of the sample gas is always measured, both ‘wet’ and ‘dry’ results can be reported. TOC (Total Organic Carbon) can also be measured without the need for an additional FID analyzer as a sum of the individual hydrocarbons detected.

Analysis output can be transferred via either analogue outputs or digital protocols, such as MODBUS and PROFIBUS. Gasmet™ CEMS also offers a variety of alarm functions. If any critical alarms are activated, instrument air starts to flow automatically into the system to prevent condensation.

Thanks to FTIR technology, there is no need to carry out any span or re-calibrations, with only zero calibration with nitrogen required every 24 hours.

Multiple advantages of Gasmet™ CEMS

  • Modular system designed to customer specifications
  • Fully automated measurement with comprehensive safety functions
  • Hot-extractive sampling results in no sample loss or change of composition
  • Able to detect water-soluble compounds such as HCl, HF, and NH3
  • Easy to add new compounds without any hardware changes
  • No need for a separate FID to measure TOC
  • Minimal maintenance requirement.
> Ilari Patrakka
(Published in HighTech Finland 2011)