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Continuous Emission Monitoring Systems

Step #1: Please, choose the required system or fill in the questionnaire in the "Automatic Make Up of your Continuous Emission Monitoring System" section to get recommendations
Schematic of Dilution-Extractive Continuous Emission Monitoring System
Schematic of Extractive Continuous Emission Monitoring System (Cool - Dry)
Schematic of Extractive Continuous Emission Monitoring System (Hot - Wet)
Schematic of In-Situ Continuous Emission Monitoring System
If your need is periodic control by cheap portable instrumentation please choose the Portable Emission Monitoring System here: Schematic of Portable Emission Monitoring
If your primary need is control of dust (pm2.5, pm10, tsp or opacity of dust flow) please choose Monitoring System here: Schematic of Dust Monitoring System

Dilution-Extractive or Extractive Continuous Emission Monitoring System

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In-Situ Continuous Emission Monitoring System

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Automatic Make Up of your Continuous Emission Monitoring System

Primary Benefits of Extractive Systems:

  • Conducts measurements in a point
  • Gas analyzers, which are used in the system, are specially designed to control only one specific component resulting in balanced technical characteristics i.e. sensitivity, accuracy, interference to other components etc. are as a rule in compliance with the national requirements for emission rate control
  • Calibration is conducted in a conventional way with the help of gases in cylinders (approved worldwide for the most gases)
  • The system may be located in a pavilion in a workshop and includes a block of functioning control
  • The system is more safe
  • The system can be readily expanded. Other gas analysers or dust meters can be added more cost effective

Primary Benefits of In-Situ Systems:

  • Conducts measurements on path
  • Measurements on path (integral evaluation of gases content) are considered more representative for evaluation of emission rate control in stacks or ducts
  • Only one multi-components optical gas analyzer is used in a system as a rule, which is more convenient and less expensive in a maintenance
  • Calibration is conducted in a special way with the help of special standards. It is adopted that the concentration of a pollutant over the monitoring path would be equivalent to a much higher concentration of the pollutant contained in a short calibration cell inserted into the optical beam of an open path analyzer during a precision test or accuracy audit. So running-gas or sealed short gas cells or compliant internal calibration standarts can be used
  • No need of any pavilion or a room for the system location as a rule

Questionnaire:

What purposes the system will be used for?

to get emission rate levels for official use (to present it to state environmental control agency or to receive measured emission rate levels directly by state agency)
for use by/in industry for its own needs
for scientific/educational purposes

Check up the components:

Sulphur dioxide SO2 Nitrous oxide NO Nitrogen dioxide NO2
Carbon monoxide CO Ozone O3
Mercury Hg
PM2.5 PM10 TSP
Opacity
Hydrogen fluoride HF Hydrogen chloride HCl Chlorine Cl2
Bromine Br2 Ammonia NH3 Hydrogen sulphide H2S
Nitrous
acid HNO2
Phosgene COCl2
Sulphur trioxide SO3 Hydrogen cyanide CHN2 Carbon disulphide CS2
Hydrogen bromide HBr Nitrous oxide N2O Carbon dioxide CO2
Total hydro-
carbons THC
Methane CH4 Benzene C6H6
Toluene C7H8 Formal-
dehyde HCHO
Naftalene C10H8
Acetal-
dehyde C2H4O
Propane C3H8 Ethyl-
benzene C6H5C2H5
Methanol CH4O Acethylene C2H2 Ethane C2H6
Ethene C2H4 Ethanol C2H6O Phenol C6H5OH

In what world region the system will be used?

USA or Canada European Union Russia, Other Countries


Primary Limitations of Extractive Systems:

  • Requires sampling with a sample contact. Change of concentration of studied species in a sample is possible because of cross-reaction of components and/or adsorption
  • Requires calibration by gases in cylinders as well as requires manifolds, pumps, manometers, valves, control and test equipment for conducting frequent periodic system calibration
  • Slower response due to sample transit time
  • Generally more expensive especially in exploitation

Primary Limitations of In-Situ Systems:

  • Not so many components are approved to be controlled for an official presentation
  • Hard conditions (poor opacity) can influence on result and/or duration of measurements
  • Influence of interfering components on result of measurement is generally stronger for multi-components gas analyzers - In-Situ analyzers in our case



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