螺旋槽管空气预热器的应用及效果

• 作 者: 许光伟
• 机 构: 镇海发电厂
• 出 处: 华东电力
• 发表日期: 1993年02期
• 关键词: 堵灰 回转式 低温腐蚀 火电厂锅炉 受热面积 壁温 大型锅炉 强化传热 排烟温度 东方锅炉厂

目前火电厂锅炉主要采用管式和回转式两种空气预热器,其中管式因制造和维修方便,应用最广泛。缺点是光管传热系数较低,需较大的受热面积,用于大型锅炉投资较大;低温段壁温低.容易产生低温腐蚀和管内堵灰,而且堵灰难以清除。因此使用几年后要更换。对于已采用

Currently, thermal power plant boilers mainly adopt two types of air preheaters, tubular and rotary, of which the tube is the most widely used due to its convenience in manufacture and maintenance. The disadvantage is that the heat transfer coefficient of the light pipe is relatively low, which requires a large heating area and is used for large-scale boiler investment. The wall temperature is low in the low-temperature section, which is prone to low-temperature corrosion and ash blocking in the pipe. So use a few years to be replaced. For adopted