| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
Full text from SpringerLink