Abstract—

The article presents methods and a system of assessments for estimating the technical feasibility of shifting the boilers of thermal power plants (TPPs) operating on solid fuel for burning alternative coal. A basic arrangement of carrying out works at the preliminary stage is proposed, which includes an analysis of experience gained from combustion of alternative coal at other TPPs and the characteristics (properties) of the design and alternative coals burned at a TPP. Based on field experience, the correspondence of coal grades to each other in regard to combustion stability is determined. In the course of a comparative analysis into the characteristics of the design coal burned at a TPP and alternative coal, the thermal performance indicators of the fuels, their characteristics influencing the harmful emissions and ash and slag removal, slagging and fouling properties, fuel and ash abrasive properties, explosion hazard properties, indicators characterizing the proneness to oxidation and self-ignition, and fuel flowability and congelation are estimated. The specific features of carrying out assessments in burning mixtures of solid fuels are considered. The conditions determining the technical feasibility of using alternative fuel without performing its mandatory experimental combustion are presented. Programs of organizational and technical measures for preparing and performing experimental combustion of alternative coal are given. Based on the results of works carried out at the preliminary stage, the conditions for obtaining substantiated assessments of technical feasibility and advisability of using alternative coal are determined more exactly, including the need to perform experimental combustion of alternative coal and the required scope of equipment’s modifications.

中文翻译：

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火力发电厂锅炉改烧替代煤可行性的初步评估

摘要-

本文介绍了一种评估方法和评估系统，用于评估转移使用固体燃料燃烧替代煤的火力发电厂 (TPP) 的锅炉的技术可行性。提出了初步阶段开展工作的基本安排，其中包括分析其他 TPP 燃烧替代煤的经验以及设计的特征（特性）和 TPP 燃烧的替代煤。根据现场经验，确定煤炭等级在燃烧稳定性方面的相互对应关系。在对TPP燃烧设计煤与替代煤的特性、燃料的热工性能指标、对有害排放和灰渣去除的影响特性进行对比分析的过程中，估计结渣和结垢特性、燃料和灰的磨蚀特性、爆炸危险特性、表征氧化和自燃倾向的指标以及燃料流动性和凝结。考虑了在燃烧固体燃料混合物中进行评估的具体特点。介绍了确定使用替代燃料而不进行强制实验燃烧的技术可行性的条件。给出了替代煤制备和试验燃烧的组织和技术措施方案。根据前期工作成果，更准确地确定替代煤技术可行性和适宜性评估的具体条件，