Investigation on ash formation and attrition characteristics of fuel applying to powdered coal-fired circulating fluidized bed boiler system

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-05-24 DOI:10.1016/j.powtec.2025.121130

Manxia Shang , Peixing Han , Junping Zhu , Zhong Huang , Junfu Lyu , Xiwei Ke

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引用次数: 0

Abstract

Since the mineral distribution of the crushed powdered coal (0-1 mm) differs from that of the sieved powdered coal (0-1 mm), the traditional ash formation characterization method may not apply to the powdered coal-fired circulating fluidized bed (PC-CFB) boiler. Traditional ash formation and powdered coal ash formation experiments were carried out respectively. Results show that the primary ash particle size distribution of the crushed powdered coal is quite different from that of sieved powdered coal. Additionally, the attrition characteristics are related to raw coal size before crushing. The test of physical and chemical properties of ash indicates that the above phenomena can be attributed to the large discrepancy in chemical composition and mineral phases between the two kinds of powdered coal. Finally, the analysis method and data on ash formation and attrition characteristics applicable to PC-CFB boilers are proposed, which facilitate the mathematical modeling of this novel CFB combustion technology.

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燃煤粉末状循环流化床锅炉系统中燃料的成灰及磨损特性研究

由于粉煤破碎后（0 ~ 1mm）的矿物分布与筛分后（0 ~ 1mm）的矿物分布不同，传统的灰分形成表征方法可能不适用于燃煤粉煤循环流化床锅炉。分别进行了传统成灰实验和粉煤灰成灰实验。结果表明：粉碎后的煤粉与筛分后的煤粉一次灰分粒度分布有较大差异；此外，磨耗特性与原煤破碎前粒度有关。灰分理化性质测试表明，上述现象可归因于两种煤粉的化学组成和矿物相差异较大。最后，提出了适用于PC-CFB锅炉的灰分形成和磨损特性的分析方法和数据，为这种新型循环流化床燃烧技术的数学建模提供了便利。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.