Scientific bases and peculiarities of conversion of CHPP anthracite boilers to sub-bituminous coal combustion

Q3 Engineering
M. V. Chernyavskyy, O. Provalov, Y. Miroshnychenko, O. V. Kosyachkov
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Abstract

Scientific bases and peculiarities of conversion of CHPP anthracite boilers to sub-bituminous coal combustion Print EmailUser Rating: / 0 PoorBest Category: Content №1 2024 Last Updated on 29 February 2024 Published on 30 November -0001 Hits: 1 SocButtons v1.4 Authors: M.V.Chernyavskyy*, orcid.org/0000-0003-4225-4984, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: mchernyavski@gmail.com O.Yu.Provalov, orcid.org/0000-0002-5191-2259, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: eproval@ukr.net Ye.S.Miroshnychenko, orcid.org/0000-0003-2487-6886, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: yevhenmi@gmail.com O.V.Kosyachkov, orcid.org/0000-0002-9445-8738, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: alexkosoy@ukr.net * Corresponding author e-mail: mchernyavski@gmail.com повний текст / full article Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (1): 041 - 049 https://doi.org/10.33271/nvngu/2024-1/041 Abstract: Purpose. Development of scientific foundations and generalization of experience in development and implementation of technical solutions for conversion of CHPP anthracite boilers with steam productivity up to 250 t/h for combusting sub-bituminous coal with maximum use of existing equipment. Methodology. Consumption and heat calculations of pulverizing systems, aerodynamic calculations of pulverized coal pipes and burners, thermal calculations of boilers and combustion chambers. Calculation justification of technical solutions to eliminate the risk of coal ignition in pulverizing systems and in the burners. Industrial tests on CHPP boiler units. Findings. Different types of pulverizing systems of anthracite CHPP boilers with ball-drum mills, an intermediate pulverized coal hopper and with hot air as a drying agent were considered, and a classification of pulverizing systems by the method of pulverized coal transport to the burners (with drying agent or hot air), and boilers – by the type and location of the burners and the geometry of the furnace, was performed. The problems were analyzed, the calculations of pulverizing systems, pipes, burners, and boilers were performed according to the applied technical solutions, and the experience was summarized of conversion from anthracite to sub-bituminous coal in the boilers of Myronivska, Darnytska CHPP and of the first line of Slovianska TPP. Recommendations are given on methods of conversion of anthracite boilers with a steam capacity of up to 250 t/h with different types of pulverizing systems for burning sub-bituminous coal with maximum use of existing equipment. Originality. For pulverizing systems with ball-drum mills and an intermediate hopper for pulverized coal with hot air as a drying agent classification was made for the first time by the type of transporting agent, and it was shown that when converting from anthracite to sub-bituminous coal with the air transport of pulverized coal to the burners, it is necessary to use the selection of slightly heated air from the first stage of the air heater. It is substantiated that maintaining the temperature conditions of molten slag removal while reducing the share of hot air consumption to the furnace requires the preferential operation of pulverizing systems in a single-mill mode, which is possible due to the greater grindability of sub-bituminous coal. Practical value. Based on the experience of approving technical solutions at Myronivska, Darnytska CHPPs, and at the first line of Slovianska TPP, recommendations are given on how to transfer anthracite boilers with a steam capacity of up to 250 t/h with different types of pulverizing systems for burning sub-bituminous coal with maximum use of existing equipment.
CHPP 无烟煤锅炉改用次烟煤燃烧的科学依据和特殊性
CHPP 无烟煤锅炉改用亚烟煤燃烧的科学依据和特殊性 打印 电子邮件用户评级:/ 0 差最佳类别:内容№1 2024年2月29日最后更新发布于2024年11月30日-0001点击数: 1 SocButtons v1.4 作者:M.V.Chernyavskyy*, orcid.org/0000-0003-4225-4984, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: mchernyavski@gmail.com O.Yu.Provalov, orcid.org/0000-0002-5191-2259, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: eproval@ukr.net Ye.S.Miroshnychenko, orcid.org/0000-0003-2487-6886, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: yevhenmi@gmail.com O.V.Kosyachkov, orcid.org/0000-0002-9445-8738, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: alexkosoy@ukr.net * 通讯作者电子邮件:mchernyavski@gmail.com повний текст / 全文 Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu.2024, (1):041 - 049 https://doi.org/10.33271/nvngu/2024-1/041 摘要:目的。为最大限度地利用现有设备将蒸汽生产率高达 250 吨/小时的 CHPP 无烟煤锅炉改装为燃烧次烟煤的技术解决方案的开发和实施奠定科学基础并推广经验。方法。制粉系统的消耗和热量计算、煤粉管道和燃烧器的空气动力计算、锅炉和燃烧室的热量计算。计算消除煤粉制粉系统和燃烧器燃煤风险的技术解决方案的合理性。对 CHPP 锅炉装置进行工业试验。结果。考虑了不同类型的无烟煤 CHPP 锅炉制粉系统,包括球磨机、中间煤粉斗和热空气作为干燥剂,并根据煤粉输送到燃烧器的方法(使用干燥剂或热空气)对制粉系统进行了分类,根据燃烧器的类型和位置以及炉膛的几何形状对锅炉进行了分类。对问题进行了分析,根据应用的技术解决方案对制粉系统、管道、燃烧器和锅炉进行了计算,并总结了在 Myronivska、Darnytska CHPP 和 Slovianska TPP 一线锅炉中将无烟煤转换为亚烟煤的经验。就如何在最大限度利用现有设备的情况下,将蒸汽容量高达 250 吨/小时的无烟煤锅炉转换为燃烧亚烟煤的不同类型的制粉系统提出了建议。独创性。首次根据输送剂的类型,对带有球磨机和煤粉中间料斗、以热空气为干燥剂的煤粉制粉系统进行了分类,结果表明,在将无烟煤转换为亚烟煤,并将煤粉通过空气输送到燃烧器时,有必要从第一级空气加热器中选择微热空气。事实证明,要保持熔融除渣的温度条件,同时减少炉内热空气的消耗量,需要优先使用单磨模式的制粉系统,这是因为亚烟煤的可磨性更高。实用价值。根据在 Myronivska、Darnytska CHPP 和 Slovianska TPP 一线核准技术解决方案的经验,就如何在最大限度利用现有设备的情况下,将蒸汽容量高达 250 吨/小时的无烟煤锅炉与不同类型的制粉系统转移到燃烧亚烟煤的模式提出了建议。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
1.70
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