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Progress and recent trend in MILD combustion

Science China(Technological Sciences) 2011年第2期54卷 255-269页

作者： LI PengFei MI JianChun DALLY B B WANG FeiFei WANG Lin LIU ZhaoHui CHEN Sheng ZHENG ChuGuang State Key Laboratory of Turbulence and Complex Systems Peking University Beijing 100871 China School of Mechanical Engineering University of Adelaide South Australia 5005 Australia State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China

Moderate or intense low oxygen dilution(MILD)combustion plays a significant role in the mitigation of combustion-generated pollutants and greenhouse gases whilst meeting thermal efficiency ***,due to the lack of the fundamental knowledge on this combustion,there is a misconception that MILD combustion should be established by high preheating of the air,which has limited its *** research and development on this combustion has been performed for several years. We have found that the requirements for establishing the MILD combustion are more relaxed than *** is also revealed that this combustion of different type,i.e.,non-premixed,partially premixed and fully premixed,can be achieved by firing various fuels(i.e.,gaseous,liquid and solid fuels).It is suggested that the application of the MILD combustion can be expanded *** present review summarizes the progress and recent trend made in the R&D of this combustion and recommends further fundamental studies for improving our knowledge and widening its applications.

关键词： high temperature air combustion flameless oxidation flameless combustion oxy-fuel combustion

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Numerical Simulation of flameless Premixed Combustion with an Annular Nozzle in a Recuperative Furnace

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Chinese Journal of Chemical Engineering 2010年第1期18卷 10-17页

作者：米建春李鹏飞郑楚光 State Key Laboratory of Turbulence and Complex Systems Department of Energy-& Resources Engineering College of Engineering Peking University Beijing 100871 China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China

This paper reports an investigation of Computational Fluid Dynamics(CFD)on the influence of injection momentum rate of premixed air and fuel on the flameless Moderate or Intense Low oxygen Dilution(MILD) combustion in a recuperative *** of the furnace flow velocity,temperature,O2,CO2 and NOx concentrations are *** obtained suggest that the flue gas recirculation plays a vital role in establishing the premixed MILD *** is also revealed that there is a critical momentum rate of the fuel-air mixture below which MILD combustion does not ***,the momentum rate appears to have less significant influence on conventional global combustion than on MILD combustion.

关键词： flameless oxidation premixed combustion numerical simulation

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Clean and Efficient Burner Systems for Heat Treating Furnaces

Clean and Efficient Burner Systems for Heat Treating Furnace...

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第十届中国钢铁年会暨第六届宝钢学术年会

作者： Joachim G.Wünning Li Jun WS W?rmeprozesstechnik GmbH Baosteel Group Corporation Research Institute R&D Center

The reduction of waste gas losses is often the most effective and economic way to increase the efficiency of industrial furnaces. Regenerative burners achieve highest efficiency but one has accept a certain expenditure for cyclic switching and exhaust gas suction. This might not be justified for smaller burner sizes and furnaces. A new gap flow recuperative burner reaches almost the same efficiencies with a recuperative system. To increase the working temperature range, the gap flow heat exchanger can be combined with a ceramic heat exchanger. One important aspect which has to be considered is thermal NO-formation, especially when preheating the combustion air. The use of flameless oxidation technology enables lowest NOx emissions despite high air preheat temperatures.

关键词： combustion heat recovery preheated air low NOx flameless oxidation

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