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首页> 外文会议>European biomass conference and exhibition;ETA-Florence Renewable Energies >OPTIMIZATION OF A 50 MW BUBBLING FLUIDIZED BED BIOMASS COMBUSTION FURNACE BY MEANS OF COMPUTATIONAL PARTICLE FLUID DYNAMICS
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OPTIMIZATION OF A 50 MW BUBBLING FLUIDIZED BED BIOMASS COMBUSTION FURNACE BY MEANS OF COMPUTATIONAL PARTICLE FLUID DYNAMICS

机译：计算颗粒流体动力学法优化50 MW鼓泡流化床床燃烧炉。

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摘要

An efficient utilization of biomass fuels in CHP plants is often limited by the melting behavior of thernbiomass ash which causes unplanned shutdowns of the plants. If temperatures exceed the ash melting temperaturerndeposits can affect the operation negatively: The deposits are observed mainly in the freeboard of the combustionrnchamber where the highest temperatures are measured. These layers will grow and also could break off the wall andrnfall into the bed region. In this work a bubbling fluidized bed combustion chamber with 50 MW biomass input isrnnumerically investigated by means of computational particle fluid dynamics to detect zones where ash melting canrnoccur. For this purpose the CPFD code Barracuda Version 16 is used. Areas where the deposits are formed wererndetected by simulation runs and compared with fouling observed on the furnace walls in the freeboard of therncombustion chamber. In a second step the model is used to find an optimized operational point with a reducedrnnumber of areas with critical temperature. Based on the findings in this work the model is suitable for furtherrninvestigations and optimizations of the reactor.
机译：CHP工厂中生物质燃料的有效利用通常受到生物质灰分的熔化行为的限制，这会导致工厂的计划外关闭。如果温度超过灰烬熔化温度，则沉积物可能会对运行产生不利影响：主要在燃烧室的干舷处观察到沉积物，那里是测量最高温度的地方。这些层将增长，也可能折断墙并掉入床层区域。在这项工作中，通过计算粒子流体动力学方法，对具有50兆瓦生物质输入的鼓泡流化床燃烧室进行了研究，以检测灰烬熔化的区域。为此，使用了CPFD代码梭子鱼版本16。通过模拟运行检测形成沉积物的区域，并将其与在燃烧室干舷的炉壁上观察到的结垢进行比较。在第二步中，该模型用于找到具有临界温度的区域数量减少的优化操作点。基于这项工作的发现，该模型适用于进一步研究和优化反应堆。

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