Structure and Components

Except the gas sampling subsystem, FTIR CEMS includes several main devices in cabinet.

• Industrial Control Computer: It facilitates data communication with the FT-IR monitoring subsystem and DCS. The data acquisition and processing subsystem, equipped with a display and printer, can present and print hourly, daily, monthly, and annual averages, as well as maximum and minimum values for gas component concentrations (SO₂, NO_X, HCl, HF, CO, CO₂, H₂O, O₂) and particulate matter concentration, alongside flue gas flow rates. It can also display and print hourly, daily, monthly, and annual reports for pollutant emissions including SO₂, NO_x, HCl, HF, CO, CO₂, and particulate matter.
• System control panel: displays trace heating and thermostat box temperatures, backflush control, operational status, sampling and intake air flow rates.
• Compressed air purification unit: Supplies clean air to the instrumentation interferometer.
• FTIR gas analyzer :
  1. Independently developed and designed interferometer for field applications, robust and durable with lifetime maintenance-free operation;
  2. Interferometer section utilises helium-neon laser, offering superior wavelength stability compared to semiconductor lasers;
  3. Fully metallic, multi-reflective, high-temperature gold-plated gas cell, corrosion-resistant and highly reliable, with no loss of water-soluble gas components such as HCl or NH₃;
  4. Spectrometer resolution optimised for target gases, delivering high detection accuracy;
  5. High internal temperature control precision with excellent environmental adaptability;
  6. Incorporates a long-life infrared light source;
  7. Modular design featuring light source, spectrometer, core circuitry, and gas cell modules, ensuring high reliability, scalability, and ease of maintenance.