This paper presents a simulation study of municipal solid waste (MSW) combustion using a multi-fuel combustion model, which was an extended version from the one previously developed by the authors. The model was a steady-state model with partial transient implementation as user-defined functions (UDF) developed in ANSYS Fluent platform to investigate the combustion behavior of fuel interacting in the solid and gas phases. The solid phase was simulated using discrete particle model (DPM). The extended simulation model took into consideration the difference of properties and combustion characteristics of different MSW components. The main improvement was the application of a newly developed algorithm that allows the influence of the surrounding particles and environment on the simulating particle and the possible synergy between them. The combustion and furnace zone of an MSW power plant in Hatyai, Thailand was the simulated case study and the measured temperatures from various sensor locations at the plant exhaust were used for model validation. The inputs for volatile combustion were obtained from pyrolysis experiments. For compatibility with GRI-Mech 3.0, CH₃CHO and C₂H₂ were used to represent the tar component. In the fuel bed zone, the simulated temperatures were higher than the measured temperatures up to 36%, which were the results of the complete combustion of the simulated fuel bed at too early location on the grate. For the fluid phase, the simulated mean temperature at the locations that were not affected by fuel bed combustion was approximately 6% different from the measured values. Synergy between particles was observed and attributed to the effect of nearby particles' properties on the combustion of simulating particle.

中文翻译：

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使用改进的稳态离散粒子模型模拟研究多燃料燃烧行为和协同效应

本文介绍了使用多燃料燃烧模型对城市固体废物 (MSW) 燃烧的模拟研究，该模型是作者先前开发的模型的扩展版本。该模型是一个稳态模型，在 ANSYS Fluent 平台中开发了部分瞬态实现为用户定义函数 (UDF)，以研究燃料在固相和气相中相互作用的燃烧行为。使用离散粒子模型 (DPM) 模拟固相。扩展的模拟模型考虑了不同生活垃圾成分的特性和燃烧特性的差异。主要改进是应用了新开发的算法，该算法允许周围粒子和环境对模拟粒子的影响以及它们之间可能的协同作用。来自工厂排气处不同传感器位置的测量温度用于模型验证。挥发性燃烧的输入来自热解实验。与 GRI-Mech 3.0、CH ₃ CHO 和 C ₂ H ₂兼容被用来表示焦油组件。在燃料床区，模拟温度比实测温度高36%，这是模拟燃料床在炉排过早位置完全燃烧的结果。对于流体相，未受燃料床燃烧影响的位置的模拟平均温度与测量值相差约 6%。观察到粒子之间的协同作用，并归因于附近粒子的特性对模拟粒子燃烧的影响。