| 数字全息在线测量煤粉粒度分布 |
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| 引用本文： | 赵亮,吴晨月,林小丹,吴迎春,吴学成,周永刚,邱坤赞,岑可法.数字全息在线测量煤粉粒度分布[J].化工学报,2018,69(2):611-617. |
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| 作者姓名： | 赵亮 吴晨月 林小丹 吴迎春 吴学成 周永刚 邱坤赞 岑可法 |
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| 作者单位： | 浙江大学能源清洁利用国家重点实验室, 浙江 杭州 310027 |
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| 基金项目： | 国家自然科学基金项目（51576177）；国家自然科学基金重大项目（51390491）；国家重点基础研究发展计划项目（2015CB251501）。 |
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| 摘 要： | 煤粉粒度是燃煤电厂的重要指标，在线测量煤粉粒度能够即时指导锅炉优化运行，对节能减排具有重要意义。搭建了一套模拟一次风粉管道的煤粉粒径在线测量的装置，解决了传统取样方法堵塞和测量实时性差的问题，并设计实验研究数字全息在线测量煤粉粒度的可行性和可靠性。实验结果表明，数字全息在线测量煤粉粒度分布曲线与激光粒度仪的测量曲线趋势一致，平均粒径相对误差为5.6%，表征粒度分布的关键参数d50和d90的相对误差均低于2%，满足工业应用的需求。数字全息技术对稀释前后不同浓度的煤粉粒径关键参数的测量相对误差均低于7%，稀释前后的煤粉粒度的数量分布和体积曲线的趋势一致，验证了数字全息技术在线测量煤粉粒度分布的可靠性，为整体测量装置的开发奠定了基础。
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| 关 键 词： | 数字全息 在线测量 粒子 粒度分布 |
| 收稿时间： | 2017-09-11 |
| 修稿时间： | 2017-11-27 |
On-line measurement of coal powder size distribution using digital holography |
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| ZHAO Liang,WU Chenyue,LIN Xiaodan,WU Yingchun,WU Xuecheng,ZHOU Yonggang,QIU Kunzan,CEN Kefa.On-line measurement of coal powder size distribution using digital holography[J].Journal of Chemical Industry and Engineering(China),2018,69(2):611-617. |
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| Authors: | ZHAO Liang WU Chenyue LIN Xiaodan WU Yingchun WU Xuecheng ZHOU Yonggang QIU Kunzan CEN Kefa |
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| Affiliation: | State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China |
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| Abstract: | Particle size distribution of coal powder is one of the most important indexes which contribute a lot to energy conservation and emission reduction of power plant. Digital holography is applied to measure the particle size distribution on a set of device stimulating the actual working conditions of coal supply system of power station. The results show that the distribution curve measured by digital holography has the similar trend with the curve measured by laser particle size analyzer. The relative error between the average diameters is 5.6%. The relative errors between the d50 and d90, are less than 2% which is in the allowable range. The relative errors between before and after the dilution is lower than 7%. The trends of particle size distribution curve of the same sample are consistent in different conditions. The reliability of digital holography for on-line measurement of pulverized coal particle size distribution is verified, which lays a foundation for the development of the overall measurement instrument. |
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| Keywords: | digital holography on-line measurement particle size distribution |
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