Development of efficient simulation methods for fluidized beds

在加拿大，省和地区当局促进减少废物政策和循环经济，以**减少废物处理和填埋、再利用和再循环废物材料。在这种情况下，Enerkem已经申请了**一种化学工艺的专利，该工艺可以将不可回收废物中包含的碳回收为生物燃料，为焚烧或垃圾填埋提供了**可持续的替代方案。这种替代技术通过在沸腾床反应器内气化将碳源**转化为合成气(合成气)。基于计算流体动力学与离散元耦合的欧拉-拉格朗日方法(CFD-DEM)的数值模拟特别适用于预测这种**鼓泡床反应器内的强耦合湍流两相流动。本研究项目旨在开发、校准和验证安装在Enerkem研究设施中的实验室规模的流态化反应器的**CFD-DEM。这一新的研究**合作将提供一个适用于**Enerkem工艺中所使用的气化炉的典型设计和操作的原始模型。非定常数值模拟将提供对**多相流体动力学物理和数值参数的敏感性的关键了解，同时确保解的有效性。**本研究项目的结果将对Enerkem技术的未来改进**以及双方即将展开的未来合作非常有用。

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.