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Modified sulfation model for simulation of pulverized coal combustion

机译：改进的硫酸化模型，用于模拟煤粉燃烧

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This work deals with the development of mathematical techniques for incorporating existing sulfation models into a CFD code for simulation of the flow and heat and mass transfer in multi-phase reacting flow; i.e. in the combustion of pulverized coal with the dry type sulfur absorption process. By compromising the ability to maintain some features of the sulfation, as suggested in literatures with computation time, the model was successfully embedded into FAFNIR, a CFD code by Lockwood et al. and has been used for prediction of SO_2 absorption in pulverized coal combustion to compare with experimental data at various conditions. This paper focuses on mathematical representation of the sulfation process by including the effects of temperature on the reaction rate at zero sulfation and during increased sulfate loading or accumulation of product layers. The model is relatively simple and is applicable over a wide range of temperatures, particle sizes and SO_2 concentrations. Validation was performed and it was found that the model satisfactorily represents the amount of accumulated sulfate within the entire domain of calculation.
机译：这项工作涉及数学技术的发展，该数学技术将现有的硫酸化模型合并到CFD代码中，以模拟多相反应流中的流动以及传热和传质。即以干式吸收硫的方式燃烧粉煤。如文献中所建议的那样，通过破坏维持硫酸盐化某些特征的能力以及计算时间，该模型已成功地嵌入到由洛克伍德等人开发的CFD代码FAFNIR中。并已用于预测煤粉燃烧中SO_2的吸收，以便与各种条件下的实验数据进行比较。本文通过包括温度对零硫酸化和增加硫酸盐负载或产物层积累期间反应速率的影响，着重于硫酸化过程的数学表示。该模型相对简单，适用于各种温度，粒度和SO_2浓度。进行了验证，发现该模型令人满意地代表了整个计算范围内的硫酸盐累积量。

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