电站锅炉水平侧包墙变形的试验研究  

Experimental investigation of the side wall deformation in the PCP region of a utility boiler

作　　者：庞力平[1] 孙保民[1] 刘宇鑫[1] 刘彤[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206

出　　处：《清华大学学报（自然科学版）》2009年第5期702-706,共5页Journal of Tsinghua University(Science and Technology)

基　　金：长江学者和创新团队发展计划项目(IRT0720)

摘　　要：针对某类型锅炉水平侧包墙变形问题进行了试验研究。理论计算给出了锅炉包墙区域单相情况下压降和流量分配情况,根据计算结果安排了锅炉试验方案。对出现变形的一台1025t/h锅炉和未出现变形的一台1085t/h锅炉的启动过程进行试验。比较两台锅炉启动过程升温升压、升负荷与锅炉包墙区域温度变化的关系,分析出现变形的原因。结果表明:电站锅炉水平侧包墙变形主要是由于启动过程疏水不完全,造成了侧包墙下联箱的积水堵塞联箱包墙管蒸汽流通,造成侧包墙管干烧,引起该区域变形。The deformations of the side wall of the pedant convective pass （PCP） region of a utility boiler were analyzed experimentally. A model was developed to predict the pressure drop and the flow distribution at the single-phase steam along the PCP side wall. The tests were conducted on 1 025 t/h and 1 085 t/h utility boilers with and without deformation of the PCP side walls. The deformations were analyzed based on the temperature rises, load following and wall temperatures during startup. The tests show that the PCP deformation occurs mainly from incomplete drainage of the lower header at the side wall during startup which blocks the steam flow along the side wall. The side wall then does not receive enough cooling from the steam and deformation occurs due to temperature differences along the side wall.

关 键 词：电站锅炉 水平侧包墙 变形 试验 壁面温度 

分 类 号：TK123[动力工程及工程热物理—工程热物理]