Study on the interaction between inherent minerals of coal with refuse derived fuel (RDF) during co-firing

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion Pub Date : 2023-12-29 DOI:10.1016/j.crcon.2023.100208

Yanchi Jiang , Lanting Zhuo , Xiaojiang Wu , Zhongxiao Zhang , Xinwei Guo , Junjie Fan

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Abstract

In this paper, refuse derived fuel (RDF) and bituminous coal were co-fired to investigate the particulate matter (PM) yields and the interaction between the inherit minerals in a lab-scale drop tube furnace (DTF). The PM_1-10 yields during the co-firing of coal and RDF dramatically decreased by 16.29 %∼28.5 % of the combustion of coal alone. In addition, methane auxiliary combustion inhibited the PM₁ yields by 7.95 % at air atmosphere. The Si-rich minerals in coal interreacted with the organic alkali (earth) metals in RDF, massively generating sticky particles with high liquid amount of K-Al-Si and Ca-Al-Si, promoting the transformation of fine grains into coarser mode. Moreover, it was proved that both methane auxiliary combustion and co-firing can reduce the emission of fine particles. The additional heat accelerated the burn of the char at the early stage of combustion, providing adequate time for the interaction between the inorganic species. Through thermodynamic equilibrium calculations of 1500 ∼ 3000 fly ash grains, it was found that co-firing increased the formation of sticky particles by 64.8 %∼70.3 %, resulting in a significant enhancement in capturing fine particles and Na, K vapor. Therefore, the co-firing of coal with RDF offers a promising approach to realize the harmless and resourceful treatment of municipal solid waste (MSW), and inhibit land resource losses caused by landfill

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煤炭固有矿物质与垃圾衍生燃料（RDF）在联合燃烧过程中的相互作用研究

本文在实验室规模的滴管炉（DTF）中对垃圾衍生燃料（RDF）和烟煤进行了联合燃烧，以研究颗粒物（PM）的产率和继承矿物之间的相互作用。在煤和 RDF 共同燃烧过程中，PM1-10 的产量比单独燃烧煤时大幅减少了 16.29 %∼28.5 %。此外，在空气环境下，甲烷辅助燃烧抑制了 7.95 % 的 PM1 产率。煤中的富硅矿物与 RDF 中的有机碱（土）金属发生了相互作用，大量生成了具有高液态 K-Al-Si 和 Ca-Al-Si 量的粘性颗粒，促进了细粒向粗粒的转化。此外，实践证明，甲烷辅助燃烧和联合燃烧都能减少细颗粒物的排放。额外的热量加速了燃烧初期焦炭的燃烧，为无机物之间的相互作用提供了充足的时间。通过对 1500 ∼ 3000 粉煤灰颗粒的热力学平衡计算发现，协同燃烧使粘性颗粒的形成增加了 64.8 % ∼ 70.3 %，从而显著提高了细颗粒和 Na、K 蒸汽的捕获量。因此，煤与 RDF 协同燃烧为实现城市固体废弃物（MSW）的无害化和资源化处理、抑制垃圾填埋造成的土地资源损失提供了一种可行的方法。

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来源期刊

Carbon Resources Conversion Materials Science-Materials Science (miscellaneous)

CiteScore

9.90

自引率

11.70%

发文量

审稿时长

10 weeks

期刊介绍： Carbon Resources Conversion (CRC) publishes fundamental studies and industrial developments regarding relevant technologies aiming for the clean, efficient, value-added, and low-carbon utilization of carbon-containing resources as fuel for energy and as feedstock for materials or chemicals from, for example, fossil fuels, biomass, syngas, CO2, hydrocarbons, and organic wastes via physical, thermal, chemical, biological, and other technical methods. CRC also publishes scientific and engineering studies on resource characterization and pretreatment, carbon material innovation and production, clean technologies related to carbon resource conversion and utilization, and various process-supporting technologies, including on-line or off-line measurement and monitoring, modeling, simulations focused on safe and efficient process operation and control, and process and equipment optimization.