摘要
垂直管圈超(超)临界压力锅炉一般都在水冷壁管入口安装节流圈,以调节工质流量,使其与对应区域的热负荷相匹配,但是该类型锅炉在投运后往往出现水冷壁节流圈结垢、水动力和热偏差,以致发生爆管.通过对水冷壁结构特点的分析,对爆管原因进行了研究,参考亚临界垂直管圈直流锅炉水动力调整经验,提出超(超)临界压力锅炉垂直管屏水冷壁系统改进和进行水动力调整的建议,即减少水冷壁管入口节流圈数量,在水冷壁管(屏)的入口安装调节装置以及加装水冷壁管屏的监视测点等.
Orifice plugs are normally installed at the entrance of waterwall of ultra-supercritical pressure boilers with vertical tube panels for controlling the flow rate of the working medium to match the thermal load of the responding zone. But problems such as scale formation of the orifice plugs, hydrodynamic and thermal deviation are usually occurred after the boiler is commissioned, resulting in tube explosion. Through analysis on the structural characteristics of the waterwall, study was carried out on the causes of tube explosion. Referring to the experiences of adjustment on sub-critical once-through boiler with vertical tube panels, suggestions were presented on the improvement of waterwall system of ultra-supereritical pressure boilers with vertical tube panels and on hydrodynamic adjustment, namely reducing the number of the orifice plugs, installing control devices at the entrance of waterwall panel, as well as adding monitoring measuring points for waterwall panel, etc..
出处
《动力工程学报》
CAS
CSCD
北大核心
2010年第9期658-662,共5页
Journal of Chinese Society of Power Engineering
关键词
超(超)临界压力锅炉
垂直管屏水冷壁
水动力调整
热偏差
节流圈
调节阀
ultra-supercritical pressure boiler
waterwall with vertical tube panel
hydrodynamic adjustment
thermal deviation
orifice plug
control valve
