Modeling and analysis of particulate matter concentration in incinerator under benchmark conditions based on coupled numerical simulation
Particulate matter,a by-product of the municipal solid waste incineration(MSWI)process,can cause air pollution and contribute to haze formation.Exploring the formation mechanism of particulate matter in incinerators and the influencing factors from the generation source is very important for pollution reduction.In this article,the modeling and analysis of particle concentration in incinerator under benchmark conditions based on coupled numerical simulation was proposed.Firstly,the process flow for particulate matter generation was analyzed to determine the main factors affecting the concentration of particulate matter.Then,a numerical simulation model of particulate matter in incinerator coupled with fluid dynamic incinerator code(FLIC)and Fluent software was constructed for the real benchmark conditions.Then,the influence of the above main factors on the concentration of particulate matter was analyzed by single factor method.Finally,the optimal parameter combination of multiple factors(particle injecting velocityis 0.15m/s,60μm,wall-jet)was obtained based on orthogonal experiment and range analysis.The effectiveness of the proposed method was verified by the actual data provided by an MSWI plant in Beijing.The results indicated that when the particle size was between 35-55pm,the concentration of particulate matter gradually increased with the increase of particle size,which can provide data support for reducing the concentration of particulate matter from the perspective of process improvement and optimal control.
municipal solid waste incineration(MSWI)particle concentrationcoupled numerical modelingunivariate analysisorthogonal experimentoptimal parameter
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