Optimization of the combustion process of heatmaster grate firing biomass furnace: computational analysis

马尼托巴省正在采取重大步骤，通过立法强制放弃煤炭和石油焦炭燃料，减少空间热能产生的排放。随着煤炭作为燃料的迫在眉睫，政府正在鼓励生物质转化，并可以用符合条件的生物质产品补贴，包括农业残渣、林业残渣和专门种植的作物。尽管政府对资本成本的支持是转而使用生物质的关键诱因，但尽可能高效地利用生物质产生热量是至关重要的。总体影响将是双重的；降低运营成本，这将有助于使生物质对采用生物质转换的人显得特别有吸引力；减少排放，这将提高政府最初设定的污染控制目标。 由于生物质炉转化的重要性已经确立，这项技术仍需进一步改进。影响生物质热发生器整体性能的因素有很多，如一致的燃料进给率、燃烧室设计、空气喷射/分配、空燃比、锅炉结构和进料灵活性等。所有这些因素都在一定程度上相互依存，这使得这项技术的进一步发展具有挑战性。这项拟议的研究使用计算流体力学(CFD)工具，以更深入地了解将生物质燃料转化为可用热能的基本机制。这项CRD研究的最终目标是发展先进的知识，以进一步提高生物质炉排烧炉技术的热效率和减少污染物排放。开发这些以农业残渣为基础的燃料系统将通过清洁和高效的绿色能源生产，为农业工业释放一个主要的收入来源。它将通过出售农作物残渣作为燃料来增加农民的收入，而不是在田里燃烧它们；同时它还增加了生物质燃烧技术的市场份额。

The Province of Manitoba is taking significant steps to reduce emissions resulting from the generation of space heat by legislating the mandatory abandonment of coal and petroleum coke fuels. With the impending absence of coal as a fuel, biomass conversion is being encouraged by the government and can be subsidized with eligible biomass products including agricultural residue, forestry residue and purpose-grown crops. Although government support toward capital costs provides a key incentive for switching to biomass, it is critical that the heat generation from biomass is achieved as efficiently as possible. The overall impact will be two-fold; lower operating costs, which will help make biomass appear especially attractive to those adopting biomass conversion, and a reduction in emissions, which will enhance the original goals set out by the government regarding pollution control. As the importance of biomass furnace conversion is now established, further improvement of this technology is still required. There are several elements which contribute to the overall performance of a biomass heat generator, such as consistent fuel feed rate, combustion chamber design, air injection/distribution, air/fuel ratio, boiler configuration and feedstock flexibility. All these factors have a degree of interdependency which makes further development of this technology challenging. The proposed research uses computational fluid mechanics (CFD) tools to gain far greater insight into the fundamental mechanisms responsible of converting biomass fuel into usable thermal energy. The ultimate goal of this CRD research is to develop advanced knowledge to further improve thermal efficiency and reduce pollutant emissions of grate firing biomass furnace technology. Development of these systems for agricultural residue-based fuels will unleash a major source of revenue for agricultural industry by allowing clean and efficient green energy production. It will increase revenues for farmers by selling agricultural crop residues for fuel instead of burning them in the fields; while at the same time it increases the market share of biomass combustion technology.