文献类型：期刊文献

英文题名：A two-fluid model simulation of an industrial moving grate waste incinerator

作者：Xia, Zihong[1];Shan, Peng[1];Chen, Caixia[1];Du, Hailiang[2];Huang, Jie[2];Bai, Li[2]

机构：[1]East China Univ Sci & Technol, Dept Energy & Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai SUS Environm Co LTD, Waste Incinerat Tech & Equipment Natl Engn Lab, Shanghai 201703, Peoples R China

年份：2020

卷号：104

起止页码：183

外文期刊名：WASTE MANAGEMENT

收录：;EI(收录号：20200408076485);WOS:【SCI-EXPANDED(收录号:WOS:000514444500017)】；

基金：The authors acknowledge the financial support by the National Natural Science Foundation of China (21908062) and Shanghai SUS Environment Co., LTD (SUS17K-605-01).

语种：英文

外文关键词：Moving grate incinerator; TFM-KTGF simulation; Direct simultaneous in-bed/over-bed coupling; Realistic grate geometry

摘要：CFD modelling and simulation is an effective means of optimizing the design and operation of moving grate waste incinerators. Conventional approach models the grate combustion and the furnace combustion separately by using an in-bed/over-bed coupling procedure. In this paper, a comprehensive two-fluid reacting model that integrates the gas-solid grate incineration and the gas turbulent combustion in one scheme is developed for industrial incinerators. Realistic grate geometry and direct simultaneous coupling of the fuel bed and the freeboard gas phase are realized. According to different treatments of the solid phase, the whole incinerator is divided into three regions, namely the packed bed region, the fall region and the furnace region. The kinetic theory of granular flow (KTGF) is introduced to describe the rheological properties of waste particles, and the Ergun model is used for the gas-solid drag. Thermal conversion of wastes is characterized by the heterogeneous reactions of moisture evaporation, devolatilization, char-O-2 combustion and the homogeneous reactions of hydrocarbons combustion. Distributions of temperatures and gas species are predicted and validated by measurements. Particle properties are calculated to reveal the grate incineration characteristics. Effects of waste throughput on the incineration are also investigated. Overall, the present model provides a new methodology of in-bed and over-bed integration for the moving grate incinerator simulation. (C) 2020 Elsevier Ltd. All rights reserved.