化工进展 ›› 2017, Vol. 36 ›› Issue (07): 2368-2374.DOI: 10.16085/j.issn.1000-6613.2016-1824

• 化工过程与装备 • 上一篇    下一篇

褐煤脉冲式气流干燥传递过程研究

程茜1, 于晓晨2, 于才渊3   

  1. 1 中国核电工程有限公司河北分公司, 河北 石家庄 050000;
    2 大连市计量检测研究院, 辽宁 大连 116024;
    3 大连理工大学化工学院, 辽宁 大连 116024
  • 收稿日期:2016-10-09 修回日期:2016-12-21 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: 程茜(1990-),女,硕士,助理工程师。
  • 作者简介:程茜(1990-),女,硕士,助理工程师。E-mail:chengxi900111@sina.com。

Study on transfer process of lignite drying in an impulse pneumatic dryer

CHENG Xi1, YU Xiaochen2, YU Caiyuan3   

  1. 1 China Nuclear Power Engineering Co., Ltd., Shijiazhuang 050000, Hebei, China;
    2 Dalian Institute of Measurement and Testing, Dalian 116024, Liaoning, China;
    3 School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2016-10-09 Revised:2016-12-21 Online:2017-07-05 Published:2017-07-05

摘要: 褐煤干燥是褐煤固体热载体新法干馏工艺的重要组成部分。本文对脉冲式气流干燥器内基于气-固两相流的褐煤干燥动量、热量、质量传递过程进行了研究。依托高效成熟的气流干燥技术,以颗粒在气流中的受力情况为基础,建立了气流干燥过程中颗粒加速运动的热量传递模型和颗粒减速运动的动量及热量传递模型,并提出了新的脉冲式气流干燥器高度的设计及优化方法。通过将脉冲式气流干燥器的干燥模拟数据与相同高度的等径式气流干燥器的数据进行对比,验证了脉冲式气流干燥的高效性,并根据烟气温度、颗粒湿含量、体积传热系数等模拟参数沿干燥器高度的分布情况对其高效性的原因进行了详细分析,为脉冲式气流干燥装置工艺设计提供准确的数据依据和理论参考。

关键词: 脉冲式气流干燥, 气-固两相流, 数学模拟

Abstract: Lignite drying is an important part of new retorting technique for lignite using solid heat carrier.In this paper,transfer process of lignite drying in an impulse pneumatic dryer,including momentum,heat and mass transfer,was studied based on two-fluid multiphase flow model.According to air drying technology,which was efficient and mature,a heat transfer mathematical model of particle acceleration and a momentum-heat transfer mathematical model of particle deceleration were established based on the force of particles in the airflow.A new optimization method for the height of impulse pneumatic dryer was proposed.The efficiency of the impulse pneumatic dryer was verified by comparing the data collected from the impulse pneumatic dryer and the traditional pneumatic dryer,which was equal in height with the impulse pneumatic dryer.The reasons for high efficiency of impulse pneumatic dryer were analyzed according to the distribution of the simulation parameters,like gas temperature,particle humidity and volumetric heat transfer coefficient along the height of the dryer.This study provided a data basis and theoretical reference for the design of impulse pneumatic dryers.

Key words: impulse pneumatic dryer, gas-solid flow multiphase flow, mathematical modeling

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn