超临界锅炉螺旋管圈与内螺纹垂直管圈水冷壁特性比较  

PROPERTY COMPARISON OF WATER-WALLS WITH SPIRAL PIPE-RINGS AND WITH VERTICAL PIPE-RINGS BOASTING INNER THREADS

作　　者：高花妮 左霖[2] 罗建平 

机构地区：[1]神华陕西国华锦界能源有限责任公司,陕西榆林719319 [2]华北电力科学研究院(西安)有限公司,陕西西安710065

出　　处：《热力发电》2012年第6期1-5,10,共6页Thermal Power Generation

摘　　要：对超临界锅炉螺旋管圈和内螺纹垂直管圈2种水冷壁的结构特点、优缺点以及稳压吹管阶段和机组各负荷阶段的热偏差进行了分析和比较。结果表明,螺旋管圈水冷壁对机组负荷变化、燃料变化的适应性较好,但阻力较大,焊接工作量大,系统结构复杂;内螺纹型垂直管圈水冷壁阻力小,安装焊缝少,支撑结构和刚性梁结构简单,但对吸热偏差较敏感。二者在性能上各有特点,设计时可根据具体情况分析选用。The advantages and disadvantages in structural features for two kinds of water- wall,namely water - wall with spiral pipe - rings, and water - wall with vertical pipe - rings boasting inner threads, for supercritical boilers, as well as thermal deviation during stage of pipe - blowing with stable pressure and during stage of various unit＇s load have been analysed and compared. Results show that the water - wall with spiral pipe- rings has better adaptability to the variation of unit＇s load and variation of fuel coal, but it has larger resistance,and vast amount of welding work, as well as the structure of system being complex; the water- wall with vertical pipe- rings boasting inner treads has small resistance, and has little amount of welding work in installation,the structure of supports and rigid beams being sim- ple, but it is sensitive to heat absorption. With regrad to the two kinds of water -wall, each has its own features, during the time of design, they can be analysed and selected according to the concrete situa- tions.

关 键 词：锅炉 水冷壁 螺旋管 内螺纹垂直管 节流孔圈 热偏差 

分 类 号：TK223.31[动力工程及工程热物理—动力机械及工程]