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Online FTIR Gas Analyzer ESE-FT600

Online FTIR Gas Analyzer ESE-FT600

Online FTIR Gas Analyzer ESE-FT600
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Online FTIR Gas Analyzer ESE-FT600

Introduction

An online FTIR (Fourier Transform Infrared) gas analyzer ESE-FT600 is a self-developed product targeted at online gas analysis of environmental protection and industrial control. Based on Fourier Transform Infrared Spectroscopy (FTIR), it can simultaneously monitor multiple gas components in exhaust gas, including SO2, NOx (NO, NO2), CH4, HCl, HF, CO, CO2, O2, H2O, etc. Other gas components also can be extended as required, such as NH3, N2O, VOCs, etc. Multi-component measurement of AlO realizes accurate qualitative/quantitative analysis of waste incineration/ultra-low flue gas emission and high integration, greatly reducing maintenance cost and system cost.

Online FTIR gas analyzers are integral in industries such as petrochemical, power generation, waste management, and manufacturing, as well as in environmental monitoring and research. Their ability to provide detailed and reliable data makes them indispensable tools for ensuring process efficiency, worker safety, and environmental protection.

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  • Features

  • Comprehensive Multi-Gas Monitoring: Our FTIR gas analyzer offers high integration, enabling simultaneous measurement of various gas components, including SO₂, NOx (NO, NO₂), CH₄, HCl, HF, CO, CO₂, O₂, and H₂O. It also supports the expansion to monitor additional gases such as NH₃, N₂O, and VOCs, providing flexibility to meet diverse monitoring requirements.
  • Accurate Measurements with High-Temperature Tracing: Equipped with full-process high-temperature tracing, the analyzer maintains consistent temperatures to prevent condensation and ensure measurement accuracy. Utilizing FTIR technology combined with the Non-linear Least Squares Method, it effectively mitigates the interference of H₂O in measuring SO₂ and NOx, delivering fast response times and high precision.
  • Enhanced Optical Design for Superior Performance: The analyzer adopts a White cell optical path design, achieving a high signal-to-noise ratio, low detection limits, and a wide dynamic range. The internal gas chamber features a gold-plated endoscope surface, enhancing reflectivity and extending maintenance intervals, thus ensuring long-term stability and reliability.
  • Robust and Modular Interferometer Structure: Featuring a pyramid-type interferometer with a reflector structure, the analyzer remains unaffected by vibrations, ensuring stable operation in various environments. Its modular design facilitates easy maintenance and component replacement, reducing downtime and maintenance costs.

Technology Comparison

Brand ABrand BOur products
High-temperature FTLRHigh-temperature NDlRHigh-temperature FTIR
A device can measure multiple-components simultaneouslyA device can measure multiple-components simultaneouslyA device can measure multiple componentssimultaneously
Low detection limitPoor detection limitLow detection limit, fast response
High costLow costLow cost, high cost performance
Less maintenanceComplicated structure, more maintenanceModular design, less maintenance
 
 
 

Fourier Transform Infrared Spectroscopy (FTIR)

The FTIR technology owns wide coverage area. Each gas absorption has small interference, and it can simultaneously measure multiple gas components. When the infrared radiation enters the interferometer, it will produce two beams of coherent light. The gas sample in the gas chamber absorbs energy of coherent light with specific wavelength. When interferogram that contains sample gas absorption information has been detected by the detector, computer will perform Fourier transform and obtain the infrared spectrogram finally.

FTIR-schematic-diagram

When the infrared radiation passes gas sample, it can be observed that some infrared radiation of certain wavelength cannot get through the gas completely. That is to say, different gases will absorb the infrared radiation of specific wavelength. The infrared radiation interacts with gas molecules, and then the gas molecules gain energy from the infrared radiation to start vibration or rotation. All the vibration and rotation will cause absorption of specific wavelength in the infrared radiation. in the infrared radiation.

The absorption spectrum presents absorption degree of sample in different infrared bands through graphical form. Spectrum displays a function that infrared radiation is regarded as wavelength when passing through gas. For each wavelength, to get transmittance T, divide the infrared radiation intensity when passing through the sample gas by the infrared radiation intensity when entering the sample gas. passing through the sample gas, If the radiation intensity that enters the sample is I0, and the radiation intensity through the sample is l, then the transmittance T can be expressed as:

T=I/I0

In formula: T=Transmittance I0=Intensity when entering the sample I=Intensity when passing through the sample

In addition, the logarithm of reciprocal value of transmittance T is the absorption of infrared radiation:

A = log10(1/T)

In formula: T=Transmittance A=Absorbance

Every kind of gas will be absorbed at specific position, and concentration information for each kind of gas can be forecasted through the established relation model between sample gas absorbance and concentration.

Technical Index

ParameterIndexParameterIndex
SO2 range200mg/m³HCl range200mg/m³
NO range300mg/m³HF range200mg/m³
NO2 range300mg/m³CO2 range20%
NOx range759mg/m³O2 range25%
CO range300mg/m³Zero drift≤±2%FS/7d
H2O range40%Span drift≤±2%FS/7d
CH4 range300mg/m³Linearity error≤±2%FS

 Specification

Measuring principleSO2, NOx (NO, NO2), CH4, HCl, HF, CO, CO2, O2, H2O: FTIR Technology
O2: Zirconia principle
Communication interfaceRS232, RS485, etc.
Communication protocolSupport modbus protocol, customizable
Power supplyRated voltage: (220 +22) VAC; rated power: 1200W; AC frequency: 50/60 Hz
Working conditionAmbient temperature: -10℃~35℃; Ambient humidity: <90%RH, non-condensing
Dimension19 inches * 5U * 610mm
Weight35kg

 

 

Here’s how the online FTIR gas analyzer works:

  1. Infrared Light Source : The FTIR analyzer uses an infrared light source to emit a broad spectrum of IR radiation.
  2. Sample Cell or Path : The IR light passes through a sample cell where the gas mixture to be analyzed is present. Alternatively, the IR beam may pass through an open path in the atmosphere for environmental monitoring.
  3. Absorption of IR Radiation : As the IR light passes through the gas sample, specific wavelengths of the light are absorbed by the gases present. Each type of gas absorbs IR light at specific and characteristic wavelengths corresponding to the vibrational and rotational transitions of its molecules.
  4. Interferometer : A key component of the FTIR analyzer is the interferometer. It modifies the incoming IR light into an interference pattern. This pattern changes as the path difference between two beams of light (created by the interferometer) changes.
  5. Detector : The interfered light then reaches a detector, which records the intensity of the IR radiation at different wavelengths.
  6. Fourier Transform : The recorded interference pattern (known as an interferogram) is mathematically transformed using a Fourier transform algorithm. This transformation converts the complex interferogram into a more interpretable spectrum, showing the intensity of IR radiation as a function of wavelength or wavenumber.
  7. Spectral Analysis : The resulting spectrum is analyzed to determine which wavelengths were absorbed by the sample. By comparing these absorption features to known spectra of different gases, the analyzer identifies the gases present and determines their concentrations.
  8. Continuous Monitoring : In an online FTIR system, this process occurs continuously, allowing for real-time monitoring and analysis of the gas composition.

An online FTIR (Fourier Transform Infrared) gas analyzer is a sophisticated instrument used for continuous monitoring and analysis of gas compositions. This type of analyzer is particularly useful in industrial and environmental applications where real-time monitoring of various gases is critical.

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  • Features

  • Comprehensive Multi-Gas Monitoring: Our FTIR gas analyzer offers high integration, enabling simultaneous measurement of various gas components, including SO₂, NOx (NO, NO₂), CH₄, HCl, HF, CO, CO₂, O₂, and H₂O. It also supports the expansion to monitor additional gases such as NH₃, N₂O, and VOCs, providing flexibility to meet diverse monitoring requirements.
  • Accurate Measurements with High-Temperature Tracing: Equipped with full-process high-temperature tracing, the analyzer maintains consistent temperatures to prevent condensation and ensure measurement accuracy. Utilizing FTIR technology combined with the Non-linear Least Squares Method, it effectively mitigates the interference of H₂O in measuring SO₂ and NOx, delivering fast response times and high precision.
  • Enhanced Optical Design for Superior Performance: The analyzer adopts a White cell optical path design, achieving a high signal-to-noise ratio, low detection limits, and a wide dynamic range. The internal gas chamber features a gold-plated endoscope surface, enhancing reflectivity and extending maintenance intervals, thus ensuring long-term stability and reliability.
  • Robust and Modular Interferometer Structure: Featuring a pyramid-type interferometer with a reflector structure, the analyzer remains unaffected by vibrations, ensuring stable operation in various environments. Its modular design facilitates easy maintenance and component replacement, reducing downtime and maintenance costs.

Technology Comparison

Brand ABrand BOur products
High-temperature FTLRHigh-temperature NDlRHigh-temperature FTIR
A device can measure multiple-components simultaneouslyA device can measure multiple-components simultaneouslyA device can measure multiple componentssimultaneously
Low detection limitPoor detection limitLow detection limit, fast response
High costLow costLow cost, high cost performance
Less maintenanceComplicated structure, more maintenanceModular design, less maintenance

 

 

 

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