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

LI Shiyu; ZHOU Long; ZHANG Li; LI Zhengyang; SUN Bo; HE Qing

doi:10.13205/j.hjgc.202510019

Volume 43 Issue 10

Oct. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(10): 173-182

LI Shiyu, ZHOU Long, ZHANG Li, LI Zhengyang, SUN Bo, HE Qing. Numerical simulation of co-incineration of solid and liquid hazardous waste in rotary kilns based on FLUENT[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 173-182. doi: 10.13205/j.hjgc.202510019

Citation:

LI Shiyu, ZHOU Long, ZHANG Li, LI Zhengyang, SUN Bo, HE Qing. Numerical simulation of co-incineration of solid and liquid hazardous waste in rotary kilns based on FLUENT[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(10): 173-182. doi: 10.13205/j.hjgc.202510019

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

doi: 10.13205/j.hjgc.202510019

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

Received Date: 2024-03-25
Accepted Date: 2024-05-21
Rev Recd Date: 2024-04-29

Available Online: 2025-12-03

Publish Date: 2025-10-01

Abstract

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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References(29)

References

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