Influence of drossing and contamination of surfaces heating on reliability of solid fuel boilers in HES
Received 18.06.2021, Revised 20.10.2021, Accepted 19.11.2021, Published 17.12.2021
Abstract
Development of project, prognosis and administrative decisions is for providing of thermal efficiency and operating reliability of semiradiation and convection surfaces of heating. Analysis of capacity of the thermal electric stations that work on a hard fuel that largely depends on reliability of caldron equipment. The scientific methods of theoretical analysis in the research and practice developments and approaches, analysis of sources from the prospected theme, formalization of the built models, methods of theory of reliability, theory of sets, mathematical logic. The standardized methods of realization of thermal tests are used. A scientific value is presented by the analysis of thermal unevenness, overheats and speed-up exhausting of margin of the protracted safety of metal. The summarizing analysis of statistical information is first conducted, and the dynamics of changes of formation is appraised set aside in caldrons. The issue of contamination and slagging of heating surfaces of solid fuel boilers still remains relevant today, despite the great contribution to the study of boilers and coal. Traditional problems are characterized by large economic losses associated with the formation of slag deposits due to imperfections in boiler designs, methods of calculation and control. Based on the results of thermal studies of boilers in the operating range of loads, a draft regulatory characteristics of slag and contamination of heating surfaces. During operation, a number of shortcomings in the operation of equipment related to the design of the boiler, with the specifics of the mineral part of the fuel. The system of technical diagnostics is created for determination of intensity of drossing and contamination of surfaces of heating real-time in part of estimation of coefficients of heat transfer of clean and muddy surface of heat exchange, that take into account the structural and regime features of both separate surface and caldron on the whole, that provide the adequate estimation of indexes of thermal efficiency of semiradiation and convection surfaces of heating of coal steam-boiler.
Keywords:
caldron aggregate; drossing of surface heating; coefficient of thermal efficiency; heat transfer; coefficient of contamination; system of technical diagnostics; cleaning