Novel Technology Realizes Low Oxygen Combustion

Nov 09, 2022 | By ZHAO Weiwei; YU Runqing

A research team led by Prof. ZHANG Zhirong from Hefei Institutes of Physical Science (HFIPS), Chinese Academy of Sciences, successfully transformed traditional peroxide combustion into low oxygen combustion with self-developed technologies, which greatly reducing the degree of overheating and oxidation burning loss rate.

In this research, the team established a closed-loop control model for automatic optimization of combustion process, and realized online intelligent monitoring and optimal control of combustion process efficiency.

In a complex thermophysical environment, the technology developed helped testing multi parameters like gas combustion composition and temperature field distribution at high temperature in combustion furnace.

Based on the tunable diode laser absorption spectroscopy (TDLAS) technology, the simultaneous online measurement of the concentration of multi-component gases (O2, CO, CO2, H2O) in the heating furnace in a complex thermophysical environment provided key parameters for regulating and controlling of low oxygen combustion, low carbon emissions, etc.

Based on the infrared thermal imaging technology and colorimetric temperature measurement technology (ITIT&CTMT), the dual optical path system structure was innovatively adopted, and the depth learning technology was used to realize the real-time online automatic recognition, capture and full field temperature measurement of the workpiece in the furnace.

The model realized combination of gas concentration-temperature-control). It is based on the temperature distribution data, gas concentration data and exhaust gas emission data of the workpiece surface in the furnace, which is fed back to the combustion optimization control system to achieve low oxygen combustion control, and finally achieve online evaluation of combustion efficiency and intelligent optimization control.

The research, which started from 8 years ago, was conducted under a project aiming at combustion efficiency evaluation and regulation, which provided technical support for achieving the strategic objectives of "peak carbon dioxide emissions" and "carbon neutrality".

Now this technology has been applied to dozens of combustion furnaces in metallurgy, petrochemical and other industries, reducing carbon emissions by tens of millions of tons, meeting the virtuous circle of low-carbon combustion, energy conservation and emission reduction, improving quality, improving efficiency, helping "carbon emission reduction", and generating great economic and social benefits.

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