A new approach to reducing slagging based on laser modification of heating surfaces: Field tests and mathematical modeling; Fuel; Vol. 382

A new approach to reducing slagging based on laser modification of heating surfaces: Field tests and mathematical modeling; Fuel; Vol. 382

Bibliographic Details
Parent link:Fuel.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 382.— 2025.— Article number 109259, 18 p.
Other Authors: Feoktistov D. V. Dmitriy Vladimirovich, Glushkov D. O. Dmitry Olegovich, Paushkina K. K. Kristina Konstantinovna, Orlova E. G. Evgeniya Georgievna, Laga E. Yu. Ekaterina Yurjevna, Zhuykov A. V. Andrey Vladimirovich, Vershinina K. Yu. Kseniya Yurievna
Summary:Title screen
The article presents the results of field tests of a new approach to reducing slagging of a boiler furnace. The approach involves laser radiation treatment of metal surfaces to obtain a coating with a high degree of passivation and a special texture (microchannel or anisotropic). Due to the texture and formation of the oxide layer, the resistance of the heating surfaces to adhesion of hydrocarbon fuel combustion products, including slag, is increased. Field tests were conducted over 60 days in an operating boiler burning brown coal, the combustion products of which form solid ferrous and sulfate–calcium deposits. The study used scanning microscopy, X-ray fluorescence spectral analysis and mass analysis of slag deposits. The results showed that steel samples with the Microchannels texture formed by laser radiation are characterized by increased resistance to adhesion of brown coal slag. Using the original software code, a mathematical model has been developed to describe the slag deposition process on heat exchange surfaces modified by laser radiation. A numerical simulation was performed under conditions of dynamic change in the thickness of the slag layer on the surface of the heat exchanger pipe to assess the heat transfer characteristics in the “hot flue gases – slag layer – pipe wall – liquid coolant” system. The results showed that the steel surface modified by laser radiation, compared to the untreated surface, is resistant to slagging at the initial stages of interaction with molten ash from different types of fuel. The use of laser-modified surfaces in boiler furnaces will increase the intervals between procedures for cleaning the furnace from slag by up to 64 %. Also, due to the increase in absorbed heat per unit area by 1.6–2.2 times, the use of laser-modified surfaces increases the efficiency of energy production
Текстовый файл
AM_Agreement
Language:English
Published: 2025
Subjects:
электронный ресурс
труды учёных ТПУ
slagging
scanning microscopy
X-ray fluorescence spectral analysis
mass analysis
Online Access:https://doi.org/10.1016/j.fuel.2024.133778
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=678261

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