Boiler flue gas FTIR detector

NegotiableUpdate on 01/19

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Nature of the Manufacturer: Producers

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Overview

The FTIR detector for boiler flue gas, with its multi-component, high-precision, and real-time online monitoring capabilities, has become a key equipment for modern industrial pollution source supervision, which is of great significance for achieving energy conservation, emission reduction, and improving air quality. With the continuous improvement of national requirements for air pollution prevention and control, the application prospects of FTIR technology in boiler, power plant, chemical, metallurgical and other fields will be even broader.

Product Details

Fourier Transform Infrared Spectroscopy (FTIR) technology is a multi-component gas analysis method widely used in environmental monitoring, industrial process control, and scientific research. In the field of boiler flue gas emission monitoring, FTIR detectors have become an important tool for modern flue gas pollutant monitoring due to their high sensitivity, simultaneous detection of multiple components, and real-time online monitoring capabilities.

During the combustion process, boilers produce various harmful gases, mainly including sulfur dioxide (SO ₂), nitrogen oxides (NO, NO ₂), carbon monoxide (CO), carbon dioxide (CO ₂), ammonia (NH ∝), methane (CH ₄), and volatile organic compounds (VOCs). Traditional flue gas analysis methods such as electrochemical sensors, non dispersive infrared (NDIR), or chemiluminescence can usually only detect a single or a few gases, making it difficult to meet the comprehensive monitoring needs of complex flue gas components. FTIR technology, based on the characteristic absorption principle of molecules towards infrared light, can simultaneously identify and quantify multiple gas components, greatly improving monitoring efficiency and accuracy.

The working principle of FTIR detector is to use an infrared light source to irradiate the smoke sample, and gas molecules absorb infrared radiation at specific wavelengths, forming an absorption spectrum "fingerprint". The instrument generates interference patterns through a Michelson interferometer, and then converts the interference signals into spectra through Fourier mathematical transformation. Based on the standard absorption spectrum library of each gas, qualitative and quantitative detection is achieved through comparative analysis. Its measurement range covers the mid infrared band (usually 750-4500 cm ⁻¹), can detect dozens of gas components, and does not require frequent calibration, with high stability.

In the application of boiler flue gas monitoring, FTIR systems usually adopt two installation methods: in-situ or extractive. In situ installation of the transmitting and receiving units on both sides of the flue allows for direct measurement of smoke penetration, with fast response and minimal maintenance, but is subject to significant interference from smoke and water vapor; The extraction method uses a high-temperature sampling probe to heat and transport the flue gas to the gas pool for analysis, which can effectively remove the interference of particulate matter and moisture, and has higher measurement accuracy. It is suitable for complex working conditions with high humidity and high dust.

The advantages of FTIR detector also include: wide dynamic measurement range, low detection limit (up to ppb level), non-destructive measurement, and good long-term stability. In addition, this technology complies with international environmental standards such as EPA and EN, and can be used for continuous emission monitoring systems (CEMS) to provide compliance data support for environmental departments and enterprises.

Of course, FTIR technology also has certain limitations, such as high equipment costs, high professional requirements for operators, and the need to rely on high-quality analysis software when complex spectra overlap. But with algorithm optimization and hardware advancements, these issues are gradually improving.

In summary, the boiler flue gas FTIR detector, with its multi-component, high-precision, and real-time online monitoring capabilities, has become a key equipment for modern industrial pollution source supervision, and is of great significance for achieving energy conservation, emission reduction, and improving air quality. With the continuous improvement of national requirements for air pollution prevention and control, the application prospects of FTIR technology in boiler, power plant, chemical, metallurgical and other fields will be even broader.