生物质炭化颗粒燃烧过程的数值模拟研究

Simulative Sudy on the Burning Process of Biomass Carbide Particle

文中应用计算流体力学软件,采用正交法针对生物质炭化颗粒的燃烧过程进行了详细地数值计算,在不同二次风流量和进气温度条件下获得了煤粉燃烧器燃用生物质炭化颗粒的温度场分布及氮氧化物生成情况,并通过对比分析获得了最优方案。研究表明生物质炭化颗粒在燃烧器内部的火焰传播受二次风影响非常明显,在特定工况下存在着最优二次风的进气温度及风量。本文的研究提供了一种获得最优二次风参数的方法,对传统煤粉燃烧器燃用生物质颗粒具有一定指导意义。

An orthogonal method is used in this paper to fully study the burning process of the biomass carbide particle with the computational fluid dynamics software. The distribution of temperature field and nitrogen oxides formation of biomass carbide particle used in pulverized coal burner are obtained in the conditions of various secondary air flows and intake temperature, and the best scheme is achieved by the comparative analysis. The study shows that, the flame transmission of biomass carbide particle inside the burner is largely affected by the secondary air, and there exists optimal intake temperature and secondary air flow under a special condition. This article provides a way for getting the optimal parameters of secondary air, which has guiding signification on the biomass particle used in traditional pulverized coal burners.