摘要
介绍了垂直管圈直流炉结构特点及节流孔板垢物聚结的情况。通过垢物宏观检查、能谱分析、SEM微观形貌分析、炉水品质测量等试验和节流孔板设计结构、水动力分析,结果表明:垢物的主要成分为Fe3O4及少量Fe2O3,汽水品质不良、孔板结构形状、运行控制是产生节流孔板垢物的主要原因,联箱检修残留粉状碎屑加剧了垢物的聚结长大,导致了锅炉水冷壁超温过热爆管。提出了控制和减少垢物聚结的技术措施,为其他类似结构的超超临界机组或其他亚临界、超临界机组提供借鉴。
The structure features of the vertical tube coil once-through boiler and the sulfate scale coalescing on its throttle orifices were presented. Through macroscopic test of the sulfate scale, energy spectrum analysis, SEM micro- scopic analysis of surface morphology, oxygen dissolution measurement of the boiler water, and the structural and hy- drodynamic analysis of the orifice plate, it was concluded that the main component of the sulfate scale was Fe304 mixed with some Fe203. The low quality steam-water, the construction shape, and the operational and control modes of the orifice plate were supposed to be the main causes for scaling on the orifice plate. The situation was worsened by powdery leftovers of header maintenance, which led to tube explosion of the water wall due to excessive temperature. Technical measures to control and reduce the sulfate scale coalescing were proposed.
出处
《华东电力》
北大核心
2009年第5期877-879,共3页
East China Electric Power
关键词
垂直管圈直流炉
节流孔圈
垢物分析
结垢原因
预控措施
vertical tube coils once-through boiler
throttle orifice
analysis of sulfate scale
cause for scaling
pre- control measure
