干煤粉气化工艺煤粉流量调节阀数值模拟

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英文篇名：Numerical simulation of regulating valve for pulverized coal in dry pulverized coal gasification process 作者：明友 ; 陆海峰 ; 王渭 ; 陈凤官 ; 陈美华 英文作者：MING You;LU Hai-feng;WANG Wei;CHEN Feng-guan;CHEN Mei-hua;Hefei General Machinery Research Institute;Shanghai Research Center of Gasification Technology, East China University of Science and Technology; 关键词：煤粉流量调节阀 ; 数值模拟 ; 计算颗粒流体动力学 ; 流动特性 英文关键词：regulating valve for pulverized coal;;numerical simulation;;CPFD;;flow characteristics 中文刊名：化学工程 英文刊名：Chemical Engineering(China) 机构：合肥通用机械研究院有限公司;华东理工大学上海市煤气化工程技术研究中心; 出版日期：2019-10-15 出版单位：化学工程 年：2019 期：10 基金：国家重点研发计划资助项目(2018YFC0808500);; 国家自然科学基金资助项目(51876066) 语种：中文; 页：79-84 页数：6 CN：61-1136/TQ ISSN：1005-9954 分类号：TQ546

摘要

高压粉煤流量调节阀是在煤气化工艺装置中用于调节氧-煤比的关键设备。利用计算颗粒流体动力学(CPFD)方法对带有稳流管的高压粉煤流量调节阀在100%和16%开度下的工况进行模拟,重点考察了沿程压力、沿程颗粒速度、沿程颗粒质量浓度等流动特性参数的变化。结果表明:气固两相流经过调节阀一定距离后达到稳定流动,稳定流动下100%和16%开度下颗粒平均速度分别为8,6.6 m/s,颗粒平均质量浓度分别为250,240 kg/m~3;基于阀门出口压力、颗粒速度和颗粒质量浓度分布特性的分析,建议稳流管段至少为500 mm以确保气固两相流动充分发展。研究结果对高压粉煤流量调节阀的设计和控制具有一定的参考价值。
        Pressurized regulating valve for pulverized coal is a key equipment to regulate the ratio of oxygen to coal in the coal gasification process. A regulating valve for pulverized coal with flow-stabilizing pipe was simulated by using computational particle fluid dynamics(CPFD) method. The valve was operated at conditions of 100% and 16% openings, respectively. The flow parameters including pressure, particle velocity and particle mass concentration along the valve as well as its downstream pipe were emphatically investigated. The results show that gas-solid flow trends to be stable at the valve downstream with a certain distance, while the average particle velocities are 8 m/s and 6.6 m/s, and the average particle mass concentrations are 250 kg/m~3 and 240 kg/m~3, at valve openings of 100% and 16%, respectively. Based on the analysis of distributions of pressure, particle velocity and particle concentration along the valve as well as its downstream pipe, the distance to reach the stable flow has been obtained. It is suggested that the flow-stabilizing pipe of the valve should be not less than 500 mm to enable the gas-solid flow fully developed. The results can provide useful reference for the design and control of pressurized regulating valve for pulverized coal.

引文

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