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Total AFR™ Management. Total control of essential combustion parameters.

Total control of essential combustion parameters

Online measurements of coal flow (EUcoalflow – non-intrusive, microwave-technology based system) and air flow (EUsoft Air – accurate and reliable air sensors) are
applied to thirty-two coal burners to measure the air-fuel-ratio (AFR) and optimize it by adjusting automatically the secondary air dampers through the DCS system.

Jiang Baoshi, China Resource Power

An air-fuel-ratio control strategy plays a fundamental role in the safe and profitable operation of firing systems in heaters, boilers and furnaces. Especially in modern low-NOx burners the air-fuel-ratio has serious impact on the combustion quality. Inefficient conditions caused by an inadequate air-fuel-ratio result in high loss on ignition, emission problems, reduced boiler efficiency and material stress.

Total AFR Management is a real-time air-fuel control system that considers relevant parameters to exploit the full potential of power plants. It enables the direct adjustment of the air-fuel-ratio, which is the key-driver of combustion. Using physical and model-based measurement data of e.g. coal flow, air flow, coal fineness etc. based on DCS data and EUtech sensors, the secondary air dampers are adjusted to the desired air-fuel-level. Securing correct air-fuel-ratio values, the combustion process can be optimized.


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