基于FLUENT的回转窑同烧固液危废的数值模拟研究

李世宇; 周龙; 张莉; 李正阳; 孙波; 和庆

doi:10.13205/j.hjgc.202510019

基于FLUENT的回转窑同烧固液危废的数值模拟研究

doi: 10.13205/j.hjgc.202510019

李世宇¹,
周龙²,
张莉^1, ,,
李正阳²,
孙波²,
和庆²

1. 上海电力大学能源与机械工程学院, 上海 201306;
2. 上海天汉环境资源有限公司, 上海 201306

详细信息

作者简介:
李世宇，男，硕士研究生，主要研究方向为热力设备的流动传热模拟和分析。

通讯作者:
张莉，女，博士，教授，主要研究方向为热力设备流动传热分析及节能。mmlzhang@163.com

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出版历程
- 收稿日期: 2024-03-25
- 录用日期: 2024-05-21
- 修回日期: 2024-04-29
- 网络出版日期: 2025-12-03
- 刊出日期: 2025-10-01

Numerical simulation of co-incineration of solid and liquid hazardous waste in rotary kilns based on FLUENT

1. College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 201306, China;
2. Shanghai Tianhan Environmental Resources Co., Ltd., Shanghai 201306, China

摘要

摘要: 回转窑焚烧是危废无害化处置的主流技术之一，获得其内部燃烧流场可帮助解决污染物生成等问题。有别于单一形态危废的燃烧模拟，回转窑同烧固液危废的燃烧数值模拟需要考虑固、液废燃烧的协同处理。分析了固废、液废的燃烧特点，基于FLUENT软件平台，在借鉴前人燃烧模拟思路的基础上，探讨了回转窑同烧固液危废的数值模拟方案，并以某全尺寸回转窑焚烧炉为研究对象，将液废颗粒处理为燃烧粒子，忽略固废在燃烧床层上的翻滚移动，用特定区域模拟固废床层，将床层分为水蒸汽蒸发段、挥发分气体析出段和焦炭燃烧释放热量段，在相应区段内的方程中分别用质量源项和能量源项考虑固废燃烧的这3个阶段，同时以固体颗粒离散相方式考虑固废飞灰在回转窑焚烧炉中的运动。通过对研究对象燃烧流场的数值模拟，获得了其内部的速度场、温度场、烟气组分场及飞灰颗粒轨迹，分析了流场分布的合理性，在监测位置处提取的温度和氧含量的模拟结果与监测值基本相符，表明确定的回转窑固液危废同烧的数值模拟方案的合理性，为设计和运行人员改善燃烧过程提供参考。
- 回转窑 /
- 危废 /
- 协同模拟 /
- 数值研究
Abstract: Incineration in rotary kilns is one of the mainstream technologies for the harmless disposal of hazardous waste. Obtaining the internal combustion flow field can help solve issues， such as the generation of pollutants and the accumulation of ash and coke. Unlike simulations of single-form hazardous waste combustion， the numerical simulation of the rotary kiln require the coordinated treatment of both solid and liquid hazardous waste combustion. In this paper， the combustion characteristics of solid and liquid waste were analyzed. Based on the FLUENT software platform， a numerical simulation scheme for the co-incineration of solid and liquid hazardous waste in rotary kilns was proposed， with reference to previous combustion simulations. Using a full-scale rotary kiln incinerator as the research object， liquid waste particles were treated as combustion particles， and the rolling movement of solid waste on the combustion bed was neglected. The solid waste bed was simulated using a specific zone， divided into three sections： water vapor evaporation， volatile gas release， and char combustion with heat release. Mass source terms and energy source terms were included in the corresponding equations to account for these three processes of solid waste combustion. Additionally， the motion of solid waste fly ash in the rotary kiln incinerator was simulated using a discrete phase model. Through numerical simulation of the combustion flow field in the subject of study， the velocity field， temperature field， gas composition field， and the trajectories of fly ash particles inside the kiln were obtained. The rationality of the flow field distribution was analyzed， and the simulated results of temperature and oxygen content extracted at monitoring positions were basically consistent with the measured values， indicating the feasibility of the numerical simulation scheme for the co-incineration of solid and liquid hazardous waste in the rotary kiln proposed in this paper. The numerical simulation work provides a reference for designers and operators to optimize the combustion process.
- rotary kiln /
- hazardous waste /
- collaborative simulation /
- numerical study

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