Fluidised bed biomass combustion

流化床生物质燃烧

• 批准号: 1941040
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1941040
• 关键词: Fluidised; bed; biomass; combustion

Increasingly , biomass is being used as replacement fuel for fossil fuels. This bring along with the change problems associated with agglomeration and deposition due to the chemical composition of the ash produced. In a fluidised bed system, this can manifest itself in the form of deposits growth in freeboard regions that can then fall to the bed and cause defluidisation. This can , in turn, cause local hot spots to develop with further nucleation and growth of in-bed agglomerates which can exacerbate the problem. Ultimately, if the problem cannot be prevented or resolved by intervention then a plant shut-down would occur. In order to avoid this problem strict control of operating conditions is required and a knowledge of flue gas flows through the combustor.This project will be both experimental and computational in nature. the experiments will be carried out on a pilot plant fluidised bed (LCCC) which will be the basic system for the preliminary model validation. Subsequently, the model will be applied to an industrial partner power plant which is a full size fluidised bed combustor. Outcomes will take the form of elucidation of agglomerate formation mechanisms and optimised fluid flow models in the combustor.

越来越多的生物质能被用作化石燃料的替代燃料。这带来了由于所产生的灰的化学成分而引起的与结块和沉积有关的变化问题。在流化床系统中，这可以表现为干舷区域沉积物的生长，然后沉积到床上并引起脱流。反过来，这可能导致局部热点随着床内团块的进一步成核和生长而发展，从而加剧问题。最终，如果问题不能通过干预来预防或解决，那么核电站就会关闭。为了避免这一问题，需要严格控制运行条件，并了解通过燃烧室的烟气流动情况。这个项目将是实验性和计算性的。实验将在一个中试装置流化床（LCCC）上进行，这将是初步模型验证的基本系统。随后，该模型将应用于一个工业合作伙伴电厂，该电厂是一个全尺寸流化床燃烧室。结果将以阐明凝聚形成机制和优化燃烧室流体流动模型的形式出现。