Modeling and Control of the Oxygen Concentration in a Post Combustion Chamber of a Gas-Fired Furnace <ce:cross-ref refid='fn1'> <ce:sup loc='post'>*</ce:sup> </ce:cross-ref> <ce:footnote id='fn1'> <ce:label>*</ce:label> <ce:note-para id='npara0001' view='all'>The authors kindly express their gratitude to the industrial research partner voestalpine Stahl GmbH.</ce:note-para> </ce:footnote>

Stephan Strommer; Christoph Froehlich; Martin Niederer; Andreas Steinboeck; Andreas Kugi

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The authors kindly express their gratitude to the industrial research partner voestalpine Stahl GmbH.

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Modeling and Control of the Oxygen Concentration in a Post Combustion Chamber of a Gas-Fired Furnace * * The authors kindly express their gratitude to the industrial research partner voestalpine Stahl GmbH.

机译：燃气炉后燃烧室中氧气浓度的建模和控制 * * 作者对他们表示感谢致工业研究合作伙伴voestalpine Stahl GmbH。

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Gas-fired industrial furnaces are used for heat-treatment of semi-finished steel products. The required energy is provided by gas-fired burners, which are supplied by fuel and air. The combustion is often realized fuel rich to avoid scale formation at the product surface. Thus, the flue gas contains unburnt products, which are oxidized in a post combustion chamber by adding fresh air. The control of the volume flow of air to the post combustion chamber is a crucial task because the flue gas leaving the furnace must not contain unburnt products. For this control task, a two-degrees-of-freedom control strategy based on differential flatness in combination with a MIMO-PI controller is proposed. The basis for the control design is a first-principles mathematical model of the air supply circuit and the combustion of flammable products. The model is validated by means of measurement data from a real plant.

机译：燃气工业炉用于对钢半成品进行热处理。所需的能量由燃气燃烧器提供，燃气由燃料和空气提供。燃烧通常被实现为燃料丰富，以避免在产品表面形成水垢。因此，烟道气包含未燃烧的产物，其通过添加新鲜空气在后燃烧室中被氧化。控制进入后燃烧室的空气的体积流量是一项至关重要的任务，因为离开炉子的烟气不得包含未燃烧的产物。针对该控制任务，提出了一种基于差分平坦度与MIMO-PI控制器相结合的两自由度控制策略。控制设计的基础是送风回路和易燃产品燃烧的第一性原理数学模型。该模型通过来自真实工厂的测量数据进行验证。

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《IFAC PapersOnLine》 |2017年第1期|共6页
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Stephan Strommer; Christoph Froehlich; Martin Niederer; Andreas Steinboeck; Andreas Kugi;
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Modeling and Control of the Oxygen Concentration in a Post Combustion Chamber of a Gas-Fired Furnace * * The authors kindly express their gratitude to the industrial research partner voestalpine Stahl GmbH.

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