Development of efficient simulation methods for fluidized beds

在加拿大，省和地区当局推广减少废物政策和循环经济，以减少废物处置和填埋，再利用和回收废物。在这种情况下，Enerkem已经申请了一种化学工艺的专利，该工艺将不可回收废物中所含的碳回收为生物燃料，为焚烧或填埋提供了一种可持续的替代方案。这种替代技术通过在流化床反应器内气化将碳源 ** 转化为合成气。数值模拟依赖于欧拉-拉格朗日方法耦合计算流体动力学与离散元方法（CFD-DEM），特别适合于预测这种鼓泡流化床反应器内的强耦合湍流两相流。本研究项目的目的是开发，校准和验证一个实验室规模的流化床反应器安装在Enerkem研究设施的CFD-DEM。这项新的研究 ** 合作将提供一个原始模型，适用于Enerkem工艺中使用的气化炉的典型设计和操作。非定常数值模拟将提供对多相流体动力学的物理和数值参数的敏感性的关键理解，同时确保解决方案的有效性。该研究项目的成果将有助于Enerkem技术的未来改进 **，并开启双方即将到来的未来合作。

In Canada, provincial and territorial authorities promote waste reduction policies and circular economy to**reduce waste disposal and landfilling, reuse and recycle waste materials. In that context, Enerkem has patented**a chemical process to recycle the carbon contained in non recyclable waste into biofuels, providing a**sustainable alternative to incineration or landfilling. This alternative technology transforms the carbon source**into a synthesis gas (syngas) by gasification inside a fluidized bed reactor. Numerical simulations relying on an**Eulerian-Lagragian approach coupling Computational Fluid Dynamics with a Discrete Element Method**(CFD-DEM) are particularly adapted to predict the strongly coupled turbulent two-phase flow inside such**bubbly fluidized bed reactors. The present research project aims at developing, calibrating and validating a**CFD-DEM of a lab-scaled fluidized bed reactor installed in the Enerkem research facilities. This new research**collaboration will provide an original model adapted to the typical design and operation of a gasifier as used in**the Enerkem process. The unsteady numerical simulations will provide key understanding of the sensitivity of**physical and numerical parameters of multiphase fluid dynamics while ensuring the validity of the solutions.**The outcomes of this research project will readily be useful for a future improvement of Enerkem technology**as well as opening an imminent future collaboration between both parties.