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用于喷吹煤粉（PCI）的煤与钢铁厂飞灰及废油污泥混合的燃烧特性

Combustion Characteristics of Coal for Pulverized Coal Injection (PCI) Blending with Steel Plant Flying Dust and Waste Oil Sludge.

作者信息

Wang Yu, Zou Chong, Zhao Junxue, Wang Fei

机构信息

School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.

出版信息

ACS Omega. 2021 Oct 21;6(43):28548-28560. doi: 10.1021/acsomega.1c02554. eCollection 2021 Nov 2.

DOI:10.1021/acsomega.1c02554
PMID:34746550
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8567263/
Abstract

Various characterization methods are used to investigate the physical and chemical properties of steel plant flying dust and waste oil sludge, and the combustion characteristics of the mixtures with pulverized coal are studied via thermogravimetric analysis; the catalytic combustion mechanism is also explored. The results show that two types of metallurgical by-products with small particle sizes and developed pores are evenly dispersed in the pulverized coal and are stably combined with it. The additives reduce the ignition temperature and the temperature corresponding to the maximum combustion rate of pulverized coal; simultaneously, they increase the heat released during pulverized coal combustion. During the pyrolysis stage of pulverized coal, the heat generated via organic component combustion in waste oil sludge promotes a cracking reaction and improves the development of the char's micropore. During the char combustion stage, no catalyst deactivation phenomenon occurs under the ratios of inorganic components in the two types of metallurgical dust and sludge. Two additives markedly reduce the activation energy of the combustion reaction.

摘要

采用多种表征方法研究了钢铁厂飞灰和废油污泥的物理化学性质，并通过热重分析研究了其与煤粉混合物的燃烧特性，同时探讨了催化燃烧机理。结果表明，两种粒径小、孔隙发达的冶金副产品均匀分散在煤粉中，并与煤粉稳定结合。添加剂降低了煤粉的着火温度和最大燃烧速率对应的温度，同时增加了煤粉燃烧过程中的放热量。在煤粉热解阶段，废油污泥中有机成分燃烧产生的热量促进了裂解反应，改善了焦炭微孔的发育。在焦炭燃烧阶段，两种冶金粉尘和污泥中无机成分的比例下均未出现催化剂失活现象。两种添加剂显著降低了燃烧反应的活化能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f74/8567263/5e6213dfc206/ao1c02554_0014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f74/8567263/0df61d793c9d/ao1c02554_0007.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f74/8567263/5e6213dfc206/ao1c02554_0014.jpg

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