生物质/煤混合物的氧气-燃料共燃特性和含氮化合物的释放特性

IF 5.6 2区 工程技术 Q2 ENERGY & FUELS
Jiangang Huang , Jinzhi Zhang , Tianju Chen , Dominic Yellezuome , Ruidong Zhao , Jinhu Wu
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引用次数: 0

摘要

本研究基于大气、温度、混合比和氧气浓度等各种参数的影响,研究了松树锯末(PS)和神木煤(SM)全氧燃烧过程中的热性能和 NO 释放特性。结果表明,在松木锯末和神木煤的分解过程中,NO 的释放量随着温度的升高而减少。半焦(SC)中的 N-Q 和 N-X 含量在较高的烘干温度下增加。温度为 1000 °C 时,半焦中的 N-Q 和 N-X 含量分别为 36.9 % 和 23.2 %。当在 SM 中加入 40% PS 时,与 O2/N2 气氛相比,富氧燃料气氛中的 NO 释放量显著减少了 16.3-23.1%,点火时间从 4.0s 缩短到 0.66s。随着燃烧温度从 800 ℃ 升至 1000 ℃,NO 排放量先增加后减少。此外,将氧气浓度从 10% 增加到 40%,会缩短燃烧时间并增加 NO 的排放量。相反,将 PS 混合比从 10% 提高到 40%,则会减少 NO 排放量和转化率。这些研究结果表明,添加生物质可有效改善煤的着火情况,提高燃烧率,减少氮氧化物排放,并解决与氮氧化物排放相关的空气污染问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oxy-fuel co-combustion properties and N-containing pollutants release characteristics of biomass/coal blends

Thermal properties and NO release characteristics during oxy-fuel co-combustion of pine sawdust (PS) and Shenmu coal (SM) were investigated based on the effects of various parameters, including atmosphere, temperature, blending ratio, and oxygen concentration in this research. The results indicate that the release of NO decreased with the increasing temperature during decomposition process of PS and SM. The content of N-Q and N-X in semicoke (SC) increased at higher torrefaction temperature. The N-Q and N-X content for SC at the temperature of 1000 °C was 36.9 % and 23.2 %, respectively. When 40 % PS was added to the SM, the NO release amount was significantly reduced by 16.3–23.1 % in the oxy-fuel atmosphere compared to the O2/N2 atmosphere, and the ignition time was reduced from 4.0s to 0.66s. The NO emission initially increased and then decreased as the combustion temperature increased from 800 to 1000 °C. Furthermore, increasing the oxygen concentration from 10 % to 40 % shortens the combustion time and increases the emissions of NO. Conversely, increasing PS blending ratios from 10 % to 40 % decreased NO emission and the conversion ratio. These findings emphasize that adding biomass can effectively improve coal ignition, increase combustion rates, reduce NO emissions, and address the air pollution problems associated with NOx emissions.

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来源期刊
Journal of The Energy Institute
Journal of The Energy Institute 工程技术-能源与燃料
CiteScore
10.60
自引率
5.30%
发文量
166
审稿时长
16 days
期刊介绍: The Journal of the Energy Institute provides peer reviewed coverage of original high quality research on energy, engineering and technology.The coverage is broad and the main areas of interest include: Combustion engineering and associated technologies; process heating; power generation; engines and propulsion; emissions and environmental pollution control; clean coal technologies; carbon abatement technologies Emissions and environmental pollution control; safety and hazards; Clean coal technologies; carbon abatement technologies, including carbon capture and storage, CCS; Petroleum engineering and fuel quality, including storage and transport Alternative energy sources; biomass utilisation and biomass conversion technologies; energy from waste, incineration and recycling Energy conversion, energy recovery and energy efficiency; space heating, fuel cells, heat pumps and cooling systems Energy storage The journal''s coverage reflects changes in energy technology that result from the transition to more efficient energy production and end use together with reduced carbon emission.
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