散料掺混强化传热结构设计与模拟  

Structure design and simulation of enhanced heat transfer by solid granules mixing

作　　者：蒋滨繁 刘逸飞 王秋旺[3] 程志龙 刘永启[4] 夏德宏 JIANG Binfan;LIU Yifei;WANG Qiuwang;CHENG Zhiling;LIU Yongqi;XIA Dehong(School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry,Beijing 100083,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]冶金工业节能减排北京市重点实验室,北京100083 [3]西安交通大学能源与动力学院,陕西西安710049 [4]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《重型机械》2024年第4期76-83,共8页Heavy Machinery

摘　　要：我国每年产生的高温固体散料余热量约合1.7亿t标准煤,其中60%未得到有效回收利用。固定床间接换热器具有换热介质选择灵活、清洁好用等优势,成为高温固体散料余热回收技术的发展方向,其发展的关键在于提高颗粒固定床内传热系数。为此,基于犁体曲面原理,设计了“小扭矩、大掺混”的掺混装置,通过颗粒掺混使远离换热面的高温颗粒直接迁移到换热面,将固定床内“热传导”改变为“热输运”,从而减小固定床内渗透热阻并强化传热。Waste heat generated from high-temperature solid granules in China each year is about 170 million tons of standard coal,of which 60%has not been effectively recovered.The fixed bed indirect heat exchanger has the advantages of flexible selection of heat transfer medium,generation of clean recycled waste energy,which has become one of the most promising direction of high-temperature solid waste heat recovery.And the key to its development lies in improving the heat transfer coefficient of the particle fixed bed.Therefore,a“small torque,large mixing”mixing device is established in the study based on the principle of plow body surface.Through particle mixing,high-temperature particles far away from the heat exchange surface could be directly transported to the heat exchange surface,changing the“heat conduction”in the fixed bed to“heat transport”.As a result,the permeation thermal resistance in the fixed bed can be effectively reduced and the heat transfer is enhanced.

关 键 词：散料余热回收 颗粒定向掺混 传热强化 犁体曲面 

分 类 号：TE08[石油与天然气工程]