Computational study on co-firing of biomass with coal in an industrial scale furnace: Effect of biomass/coal ratio on flame stability and heat flux distribution

点击翻译按钮获取中文摘要

The main objective of this research project consists in a computational study on the co-firing of biomass with coal in an industrial-scale furnace used for power generation. Particular attention will be paid to investigating the possible effect of the biomass/coal ratio on flame stability and heat flux distribution. One of the issues in the use of pulverized coal (PC) firing for electricity production is the emission of carbon dioxide, which remains a significant environmental problem because of climate effects. In this regard, the utilization of biomass as a co-fired fuel has proved to be a significant option for the mitigation of greenhouse gas emissions due to the sustainable nature of biomass. Generally, a small amount of biomass co-firing does not require significant modifications to existing burners and boiler systems using pulverized coal (PC). However, to optimize the working parameters and efficiency of PC boilers and burners it is necessary to calculate the maximum biomass/coal ratio allowing existing burners to be used without significant modifications, which may cause additional costs. Such calculations can be carried out using Computational Fluid Dynamics (CFD) models and software. The proposed research focuses on the following aims: 1. CFD-based numerical simulations of biomass co-firing with pulverized coal in an industrial-scale furnace used by Capital Power Corporation. Parametric runs to study the influence of the biomass-blending ratio on the flame behavior and overall heat transfer balance of the boiler. 2. Estimation of optimum blending ratio for biomass/coal that can be used in an industrial-scale furnace operated by an industrial partner (Capital Power Corporation) without significant furnace modifications. The data gained in this project will contribute significantly to the industrial partner's (Capital Power