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›› 2010, Vol. 10 ›› Issue (6): 1132-1137.

• 过程与工艺 • 上一篇    下一篇

焦煤预热调湿过程煤脱湿动力学

谢以民 刘周恩 田亚峻 汪印 武荣成 刘云义 马晓迅   

  1. 中国科学院过程工程研究所多相复杂系统国家重点实验室 中国科学院过程工程研究所多相复杂系统国家重点实验室 中国科学院过程工程研究所多相复杂系统国家重点实验室 中国科学院过程工程研究所多相复杂系统国家重点实验室 中国科学院过程工程研究所多相复杂系统国家重点实验室 沈阳化工大学化学工程学院 西北大学化工学院
  • 收稿日期:2010-11-08 修回日期:2010-11-29 出版日期:2010-12-20 发布日期:2010-12-20
  • 通讯作者: 谢以民

Kinetics of Moisture Removal for Coal Preheating and Moisture Control

XIE Yi-min LIU Zhou-en; TIAN Ya-jun WANG Yin, WU Rong-cheng LIU Yun-yi MA Xiao-xun   

  1. State Key Laboratory of Multi-Phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences State Key Laboratory of Multi-Phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences State Key Laboratory of Multi-Phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences National Key Laboratory of Multiphase Complex System, Institute of Process Engineering、Chinese Academy of Sciences National Key Laboratory of Multiphase Complex System, Institute of Process Engineering、Chinese Academy of Sciences School of Chemical Engineering, Shenyang Institute of Chemical Technology School of Chemical Engineering, Northwest University
  • Received:2010-11-08 Revised:2010-11-29 Online:2010-12-20 Published:2010-12-20
  • Contact: XIE Yi-min

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摘要： 利用实验室气力脱湿小试装置考察了流化床和模拟输送床热气流时，不同气体温度、气速和煤粒径条件下洗精煤的脱湿特性. 结果表明，在流化床条件下，气体温度503~543 K、气速3.0~4.5 m/s时，粒径>3 mm的煤在5 s内可脱湿到含水6%~9%(w)；在模拟输送床热气流条件下，气体温度423~523 K、气速7~10 m/s时，粒径<3 mm的煤在5~7 s内可脱湿到含水6%~9%(w). 且两种条件下脱湿动力学符合Page模型.

关键词: 脱湿动力学, 流化床, 输送床, 预热调湿, 焦煤

Abstract: Under the conditions of simulated operations in the fluidized and pneumatic sections in an experimental apparatus, moisture removal behavior of coal particles was studied through investigation of variables including hot gas temperature, hot gas velocity and coal particle size. It was found that about 5 was needed to reduce the moisture of coal larger than 3 mm to 6%~9%(w) under the fluidized conditions when gas temperature was 503~543 K and gas velocity 3.0~4.5 m/s. By contrast, under the pneumatic conditions, the time for moisture removal of coal less than 3 mm was 5~7 s when gas temperature was 423~523 K and gas velocity 7~10 m/s. Analysis identified that the moisture removal kinetics could be described with the Page model in both of the simulated fluidized and pneumatic conditions.

Key words: kinetics of moisture removal, fluidized bed, pneumatic bed, preheating and moisture control, coking coal

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