双层滤料颗粒床除尘器预热过程的仿真研究
PDF下载 (337)陶初炯,杨国华,朱永锋,肖贵慧,原光辉,刘 鹏.双层滤料颗粒床除尘器预热过程的仿真研究[J].宁波大学学报(理工版),2020,33(3):40-44.DOI:
TAO Chujiong,YANG Guohua,ZHU Yongfeng,XIAO Guihui,YUAN Guanghui,LIU Peng.Simulation of preheating of dual-layer granular bed filter for gas dust removal[J].Journal of Ningbo University(Natural Science & Engineering Edition),2020,33(3):40-44.DOI:
| Title: | Simulation of preheating of dual-layer granular bed filter for gas dust removal |
| 作者: | 陶初炯, 杨国华, 朱永锋, 肖贵慧, 原光辉, 刘 鹏 |
| Author(s): | TAO Chujiong, YANG Guohua, ZHU Yongfeng, XIAO Guihui, YUAN Guanghui, LIU Peng |
| 关键词: | 颗粒床除尘器; 预热过程; 阶跃式分段制度; 数值模拟 |
| Keywords: | granular bed filter; preheating process; step type segmentation system; numerical simulation |
| 分类号: | X964 |
| 文献标识码: | A |
| 摘要: | 颗粒床除尘器在脱除含尘热解煤气粉尘前需要进行预热工作, 从而避免因携带的焦油冷凝造成设备损坏无法工作. 为研究此过程, 采用FLUENT软件对一个大型颗粒床除尘器的预热过程进行数值模拟. 该除尘器壳体内径4.8m, 高度22m, 壳体内沿垂直中心线上安装6个内径3.4m、高1.8m的过滤床. 模拟结果表明, 当预热气在过滤床流速为0.1m?s-1时, 壳体内壁面上下最大温差为76.9℃, 除尘器从10℃加热至500℃需要98880s. 本次模拟采用的阶跃式分段预热制度使除尘器壳体内壁面上下温度差较小, 减小了因温度不均匀造成的材料变形, 模拟中的滤料和壳体温度及预热所需的时间也可给实际的工程应用提供参考. |
| Abstract: | To avoid the equipment being damaged and malfunctioned due to the tar condensation, the granular bed filter should be preheated before being used for removing the dust contained in the pyrolysis gas. Such preheating process of a large granular bed dust collector is simulated by FLUENT software. The shell inner diameter of the dust collector is 4.8m and the height is 22m. Six filter beds with inner diameter of 3.4m and height of 1.8m are installed along the vertical center line in the shell. The simulation results show that when the flow rate of the preheated gas in the filter bed is 0.1m?s-1, the maximum temperature difference between the upper and lower surface of the shell is 76.9℃. It takes 98880s for the dust collector to be heated from 10℃ to 500℃. The stepped preheating system adopted in this simulation makes the temperature difference between the upper and lower sides of the inner wall of the dust collector shell smaller, which reduces the material deformation due to uneven temperature. The temperature of filter and shell in the simulation and the time required for preheating can also be used as a reference for practical engineering applications. |
| 参考文献 /References: | [1] 崔阳. 粉煤热解技术的研究现状及展望[J]. 能源化工, 2018, 39(2):33-38. [2] 白效言, 张飏, 王岩, 等. 低阶煤热解关键技术问题分析及研究进展[J]. 煤炭科学技术, 2018, 46(1):192-198. [3] 夏兴祥. 高温除尘技术综述[J]. 化工机械, 2000, 27 (1):47-552. [4] 杨国华, 周江华, 舒海平, 等. 双层滤料颗粒床过滤除尘新方法的研究[J]. 动力工程, 2005, 25(6):891-894. [5] 杨国华. 双层滤料床过滤除尘试验研究[C]//中国动力工程学会. 中国动力工程学会第三届青年学术年会论文集. 西安, 2005. [6] 姚志伟, 刘鹏, 朱永锋, 等. 双层滤料颗粒床与金属纤维毡梯级过滤特性[J]. 环境工程学报, 2019, 13(3):708- 715. [7] Tian S, Yang G H, Li Z, et al. Cascade filtration properties of a dual-layer granular bed filter[J]. Powder Technology, 2016, 301:545-556. [8] Xiao G H, Yang G H, Yang Q, et al. Effect of filter layer thickness on the filtration characteristics of dual layer granular beds[J]. Powder Technology, 2018, 335:344-353. [9] Hu F X, Yang G H, Ding G Z, et al. Experimental study on catalytic cracking of model tar compounds in a dual layer granular bed filter[J]. Applied Energy, 2016, 170: 47-57. [10] 葛冬冬. 热解炉煤粉预热入炉的关键问题研究[D]. 杭州: 浙江大学, 2017. [11] 石振晶, 夏芝香, 方梦祥, 等. 淮南烟煤热解及焦油析出特性[J]. 燃烧科学与技术, 2014, 20(1):58-64. [12] 刘栋栋, 付海明, 陈军, 等. 旋风除尘器流场及浓度场实验与模拟[J]. 环境工程学报, 2010, 4(9):2057-2064. [13] Launder B E, Spalding D B. Lectures in mathematical models of turbulence[M]. London: Academic Press, 1972. [14] 任志安, 郝点, 谢红杰. 几种湍流模型及其在FLUENT中的应用[J]. 化工装备技术, 2009, 30(2):38-40; 44. [15] 唐家鹏. ANSYS FLUENT 16.0超级学习手册[M]. 北京: 人民邮电出版社, 2016:33-34. |
| 备注/Memo: | 收稿日期:2019-09-03.宁波大学学报（理工版）网址:http://journallg.nbu.edu.cn/ 基金项目:国家高技术研究发展计划863项目（2008AA05Z205）;浙江省新苗人才计划项目（2018R405077）;宁波大学大学生科研创新计划重点项目（2018SRIP1729）. 第一作者:陶初炯（1993－）,女,浙江余姚人,在读硕士研究生,主要研究方向:能源利用与环境保护.E-mail:281578993@qq.com *通信作者:杨国华（1961－）,男,浙江嵊州人,博士/教授,主要研究方向:能源利用与环境保护.E-mail:yangguohua@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
