摘要
针对高炉冷却壁管内污垢沉积而导致传热效率低的问题,提出在高炉冷却壁管内加入固相颗粒以形成液固两相流,在防止污垢的沉积及清洗污垢的同时,增加流体的扰动强化管内对流传热。对液固两相流和单相流的传热性能进行了对比实验。结果表明,由于固相颗粒的扰动和剪切效应,不仅可以强化管内传热,而且也可以在线清洗管内污垢,在流速为2m/s,固相体积分数为3.5%～5.0%、固相粒径为2～3mm的范围内,与单相流相比,液固两相流的传热系数提高了20%～45%。实验结果为液固两相流的工业应用提供了基础。
To solve the problem of fouling deposition inside the cooling water pipes of staves, a method of liquid-solid two-phase flow is presented, which can enhance heat transfer and clean online fouling. The heat transfer characteristic of liquid-solid two-phase flow and single flow are investigated experimentally. The influence of volume fraction and particle size of the solid phase on heat transfer performance is discussed. The results show that disturbing and cutting effect can enhance convection heat transfer and clean on-line the fouling in the cooling water pipes of stave. When velocity of flow is 2 m/s, solid phase volume fractions are 3.5% ～5.0%, particle sizes of the solid phase are 2～3 mm, the heat transfer coefficients of liquid-solid two-phase flow increase 20%～ 45%. The results provide base of liquid-solid two-phase flow industry application.
出处
《铸造技术》
CAS
北大核心
2009年第11期1465-1467,共3页
Foundry Technology
基金
江苏省高校自然科学研究计划(批准号:06KJB530046)
江苏工业学院科技发展基金(批准号:ZMF07020016)资助
关键词
高炉冷却壁
液固两相流
强化传热
抗垢
清洗
Blast furnace stave
Liquid-solid two-phase flow
Enhancement heat transfer
Antifouling
Cleaning
