| 潮湿环境下微尺度颗粒撞击平板的动力学研究 |
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| 引用本文： | 李雪,东明,张璜,谢俊.潮湿环境下微尺度颗粒撞击平板的动力学研究[J].化工学报,2022,73(5):1940-1946. |
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| 作者姓名： | 李雪 东明 张璜 谢俊 |
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| 作者单位： | 1.武汉工程大学光电信息与能源工程学院，湖北 武汉 430205;2.大连理工大学能源与动力学院，辽宁 大连 116024;3.清华大学核能与新能源技术研究院，北京 100084;4.沈阳航空航天大学能源与环境学院，辽宁 沈阳 110136 |
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| 基金项目： | 先进反应堆工程与安全教育部重点实验室开放基金项目(ARES-2021-04)；;煤燃烧国家重点实验室开放基金项目(FSKLCCA2209)；;国家自然科学基金项目(51876031)； |
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| 摘 要： | 传统除尘装置对煤燃烧排放的颗粒物存在穿透窗口，湿式静电除尘器通过喷水增湿能够显著提高其脱除效率。对于不同煤种和湿度，脱除效率存在差异。因此搭建潮湿环境下不同飞灰颗粒撞击平板实验台并建立颗粒碰撞动力学模型，探究恢复系数的变化规律。结果表明，65%湿度下无烟煤的恢复系数最小，易于捕集；随着相对湿度增加，毛细力占主导，阻尼系数、临界捕集速度和接触时间增加。
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| 关 键 词： | 煤燃烧 增湿 粒子 相对湿度 恢复系数 毛细力 |
| 收稿时间： | 2021-11-12 |
Kinetic characteristics of micro-particle impact on a flat surface under humidity conditions |
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| LI Xue,DONG Ming,ZHANG Huang,XIE Jun.Kinetic characteristics of micro-particle impact on a flat surface under humidity conditions[J].Journal of Chemical Industry and Engineering(China),2022,73(5):1940-1946. |
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| Authors: | LI Xue DONG Ming ZHANG Huang XIE Jun |
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| Affiliation: | 1.School of Optical and Energy Engineering, Wuhan Institute of Technology, Wuhan 430205, Hubei, China;2.School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;3.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;4.School of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, Liaoning, China |
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| Abstract: | Conventional dust removal device has a penetration window for the particles from coal combustion. The dust removing efficiency of wet electro-static precipitator could be improved by increasing the relative humidity (RH). The efficiency is different in coal and RH. The experimental facility and kinetic model for different fly ash particles against a flat surface under humid conditions were built to explore the variation of restitution coefficient. The results show that the coefficient of restitution of anthracite is the smallest under 65% RH, and it is easy to capture. With the increase of RH, the capillary force is dominant, and the damping coefficient, critical impact velocity and contact time increase. |
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| Keywords: | coal combustion humidification particle relative humidity restitution coefficient capillary force |
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