乌斯特流化床中颗粒水分与涂层特性关系的研究

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2025-03-29 DOI:10.1016/j.apt.2025.104868

Jinnan Guo, Daoyin Liu, Jiliang Ma, Cai Liang, Xiaoping Chen

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引用次数: 0

摘要

喷雾流化床广泛用于涂层颗粒；然而，基于对众多涂层特性的评估来优化操作参数是低效的。在本研究中，将颗粒含水率作为优化涂层质量的快速指标。在具有不同流化气体温度、液体喷射速率、流化气体速度和固体质量分数的Wurster流化床中，用硅溶胶包覆多孔Al2O3颗粒。研究了涂层对颗粒含水率和涂层效率、粒径、壳形态和壳孔隙率等关键涂层特性的影响。通过提高流化气体温度和速度，或降低液体喷射速率和固体质量分数，颗粒含水率降低。当颗粒含水率较低时，涂层颗粒表面相对光滑，壳孔率低，涂层效率高，均匀性好。在此基础上，进行了一次涂层工艺，并对颗粒含水率进行了监测，从而提高了涂层质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Elucidating relationship between particle moisture and coating characteristics in a Wurster fluidized bed

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Elucidating relationship between particle moisture and coating characteristics in a Wurster fluidized bed

Spray fluidized beds are widely used for coating particles; however, optimization of operation parameters based on the assessment of numerous coating characteristics is inefficient. In this study, the particle moisture content is used as a rapid indicator to optimize the coating quality. Porous Al₂O₃ particles are coated with silica sol in a Wurster fluidized bed with different fluidizing gas temperatures, liquid spray rates, fluidizing gas velocities and solid mass fractions. The effects on particle moisture content and key coating characteristics, including the coating efficiency, particle size, shell morphology and shell porosity, are investigated. By increasing the fluidizing gas temperature and velocity, or decreasing the liquid spray rate and solid mass fraction, the particle moisture content decreases. When the particle moisture content is low, the coated particles have a relatively smooth surface with low shell porosity, and the coating exhibits high efficiency and good uniformity. Based on these results, one coating process is conducted with particle moisture content being monitored, resulting in improved coating quality.

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)