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过程工程学报 ›› 2020, Vol. 20 ›› Issue (2): 148-157.DOI: 10.12034/j.issn.1009-606X.219191

• 流动与传递 • 上一篇    下一篇

热风混合器内部流场的数值模拟与结构改进

王 娟1,2*, 李 军1,2, 高助威1,2, 何星晨1,2, 邹 槊1,2, 万加亿1,2   

  1. 1. 中国石油大学重质油国家重点实验室,北京 102249 2. 过程流体过滤与分离技术北京市重点实验室,北京 102249
  • 收稿日期:2019-05-09 修回日期:2019-06-28 出版日期:2020-02-22 发布日期:2020-02-19
  • 通讯作者: 王娟
  • 基金资助:
    中国石油化工股份有限公司资助项目

Numerical simulation of internal flow field and structure improvement of hot air mixer

Juan WANG1,2*, Jun LI1,2, Zhuwei GAO1,2, Xingchen HE1,2, Shuo ZOU1,2, Jiayi WAN1,2   

  1. 1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China 2. Beijing Key Laboratory of Process Fluid Filtration and Separation, Beijing 102249, China
  • Received:2019-05-09 Revised:2019-06-28 Online:2020-02-22 Published:2020-02-19
  • Contact: WANG Juan

摘要: 对热风混合器进行了结构改进,采用标准k??模型对改进前后热风混合器内部的流场和温度场分布进行了数值模拟。结果表明,相比于传统结构,对称T型双热风入口结构的混合器内部流场分布对称性较好,气流均匀性提高,渐缩型出口设计改善了回流问题,加设分散挡板增强了换热效果。三方面的结构改进使混合器出口气流的温度均匀性有效改善,减小了能量消耗,提高了热混合效率。

关键词: 热风混合器, 数值模拟, 对称“T”型双入口, 渐缩型出口, 挡板, 温度均匀

Abstract: Hot air mixer is a kind of equipment used in heating and drying system for intermediate cooling treatment. The traditional structure of hot air mixer has the problem of uneven distribution of outlet air temperature in industrial application. For this reason, an improved structure of hot air mixer was proposed in this work. The uniformity of flow field and temperature field distribution in hot air mixer before and after improvement was numerically simulated by using standard k?? model. The results showed that, compared with the traditional structure, the symmetry of flow field distribution in the mixer with symmetrical T double hot air inlet structure was better, and the uniformity of flow field was improved. The reverse flow was greatly improved by the tapered outlet design, and the heat transfer effect was enhanced by adding dispersive baffles. The above three structural improvements could effectively improve the temperature uniformity of the mixer outlet gas flow, reduce energy consumption and improve the thermal mixing efficiency, which had great reference value for the engineering design of the hot air mixer.

Key words: hot air mixer, numerical simulation, symmetrical “T&rdquo, double inlet, tapered outlet, baffle, uniform temperature