1) water wall tubes
垂直水冷壁管
1.
Presents an experimental investigation on the characteristics of vapor-liquid two-phase flow distribution in the vertical water wall tubes connected by the middle distributing headers located in the sub-critical pressure region in a domestic once-through boiler of 600 MW on a high pressure vapor-water experimental setup of Xi an Jiaotong University.
试验研究了工质压力、质量流速和集箱入口质量含汽率对分配集箱垂直水冷壁管流量分配和质量含汽率分配特性的影响。
2) vertical water wall
垂直水冷壁
1.
Discussion and analysis have been made for steam parameters,vertical water wall design,arrangement of SH and RH as well as the high strength and high heat resistant steel,start-up system,etc.
阐述哈锅超超临界锅炉的设计特点,对蒸汽参数、垂直水冷壁设计、过热器与再热器的布置和高热强钢、启动系统等作了分析与讨论。
2.
The hydrodynamic of vertical water wall in an entrained-flow coal gasifier with 700 ton coal per day was predicted in this paper in order to supply reasonable understanding for the design.
可以采用临界流速作为判断此类气化炉垂直水冷壁管内流动是否稳定的依据。
3) vertical rifled waterwall
垂直内螺纹管水冷壁
4) vertical upward water wall
垂直上升水冷壁管圈
5) water-wall tube
水冷壁管
1.
An analysis and investigation on the leakage in water-wall tube of profiled flue of the coal-burning boiler;
燃煤锅炉异型烟道水冷壁管泄漏分析研究
2.
Boiler deformation and invalidation analysis of water-wall tubes
锅炉水冷壁管变形失效分析
3.
Taking an accident of blast out of a boiler water-wall tube as on example,the article discussed the cause of the external uniform corrosion of the fire-side of pressurized water-wall tubes of a boiler and its preventive measures.
对一起锅炉水冷壁管爆管事故进行了分析 ,探讨了炉膛受压元件的外部均匀腐蚀的原因并提出预防措施 。
6) water wall tube
水冷壁管
1.
The failure of water wall tubes in ultra-high pressure power boiler of power unit was analyzed by means of physical-chemical analysis methods.
利用理化分析方法对动力车间超高压动力锅炉水冷壁管的开裂原因进行了分析,结果表明:长期在高温下工作产生了严重的珠光体球化,甚至石墨化,致使材料组织老化,力学性能降低;在高温氧化和热疲劳的联合作用下产生了众多的环向和纵向裂纹。
2.
Restriction choke is suggested to be placed in water wall tubes to avoid leakage,and to raise the safety and economy.
针对锅炉水冷壁折焰角鼻区受热面频繁泄漏现象,从外观、化学成分、金相组织、力学性能、氢含量和锈层成分等方面进行了综合分析,论述高温高压锅炉水冷壁严重氧化和高温氢腐蚀所致泄漏的机理,提出在水冷壁管内加装节流圈的措施,杜绝了泄漏的再次发生,大大提高了锅炉的安全性和经济性。
3.
By analyzing high temperature corrosion of 300MW boiler water wall tube,the corrosion cause is studied and the efficient methods are offered to solve this problem.
从300 MW机组锅炉水冷壁管的高温腐蚀情况出发,阐述了产生高温腐蚀的原因,并提出了切实可行的预防措施。
补充资料：动力机械：水冷壁
敷设在锅炉炉膛内壁﹑由许多并联管子组成的蒸发受热面。水冷壁的作用是吸收炉膛中高温火焰或烟气的辐射热量﹐在管内产生蒸汽或热水﹐并降低炉墙温度﹐保护炉墙。在大容量锅炉中﹐炉内火焰温度很高﹐热辐射的强度很大。锅炉中有40～50％甚至更多的热量由水冷壁所吸收。除少数小容量锅炉外﹐现代的水管锅炉均以水冷壁作为锅炉中最主要的蒸发受热面。
水冷壁按结构分为光管式和膜式两种。
光管式水冷壁 由一般的锅炉钢管组成(图1 光管式水冷壁 
)。管子排列越密对炉墙保护效果越好。炉墙广泛采用轻质耐火材料和保温材料。这些材料可以砌成炉墙﹐也可敷设在水冷壁上成为敷管式炉墙以便于安装。
膜式水冷壁 将鳍片管(或扁钢与光管)相互焊接在一起组成的整块管屏(图2 膜式水冷壁
)。它的优点是气密性好﹔管屏外侧仅需敷以较薄的保温材料﹐炉膛高温烟气与炉墙不直接接触﹐有利于防止结渣﹔管屏可在制造厂成片预制﹐便于工地安装。
水冷壁材料 一般用碳素钢。锅炉压力在14兆帕以上时也有部分用合金钢的。管子外径﹕自然循环锅炉一般用51～83毫米﹔多次强制循环锅炉和直流锅炉一般用22～60毫米。直流锅炉的水冷壁不像自然循环锅炉那样一定是直立式的﹐也可以是水平围绕或其它形式的。参数高时﹐尤其在直流锅炉中﹐为了在炉膛高热负荷区防止传热恶化﹐常采用内螺纹管或在管内装设扰流子(图3 内螺纹管和管内装扰流子
)。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条