Ash Deposit Formation and Deposit Properties. A Comprehensive Summary of Research Conducted at Sandia's Combustion Research Facility
Ash Deposit Formation and Deposit Properties. A Comprehensive Summary of Research Conducted at Sandia's Combustion Research Facility
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DOI：
10.2172/760515
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发表时间：
2000-08
期刊：
影响因子：
--
通讯作者：
L. Baxter
中科院分区：
文献类型：
--
作者：
L. Baxter
本报告总结了过去八年来在桑迪亚燃烧研究设施进行的关于煤燃烧过程中无机物命运的实验和理论工作。这项工作已经完成了四大类：煤的特性，飞灰的形成，灰沉积，和存款财产的发展。目的是提供对这四个方面的充分理解，以便能够预测当前和先进转化系统中的煤行为。这项工作导致了新的表征技术的燃料，提供了第一次，系统的和物种的具体信息的无机材料。无机材料在燃烧过程中的转化可以用这些个别物质转化的净效应来描述。存款形成机制提供了一个框架，预测沉积速率的广泛范围内的颗粒尺寸。基于这些比率的预测很多时候都是相当准确的，尽管也有重要的例外。建立了评价存款的严格框架。已经获得了大量的数据来运用这一框架，但这部分工作比任何其他工作都不成熟。准确预测存款属性作为燃料属性，锅炉设计和锅炉运行条件的函数代表了一个最关键的领域，需要额外的研究。
This report summarizes experimental and theoretical work performed at Sandia's Combustion Research Facility over the past eight years on the fate of inorganic material during coal combustion. This work has been done under four broad categories: coal characterization, fly ash formation, ash deposition, and deposit property development. The objective was to provide sufficient understanding of these four areas to be able to predict coal behavior in current and advanced conversion systems. This work has led to new characterization techniques for fuels that provide, for the first time, systematic and species specific information regarding the inorganic material. The transformations of inorganic material during combustion can be described in terms of the net effects of the transformations of these individual species. Deposit formation mechanisms provide a framework for predicting deposition rates for abroad range of particle sizes. Predictions based on these rates many times are quite accurate although there are important exceptions. A rigorous framework for evaluating deposit has been established. Substantial data have been obtained with which to exercise this framework, but this portion of the work is less mature than is any other. Accurate prediction of deposit properties as functions of fuel properties, boiler design, and boiler operating conditions represents the single most critical area where additional research is needed.