监测与诊断结果表明：锅炉经常发生在炉膛四角爆管的事故，是由于水循环工况不良而引起的。
The online monitoring and fault diagnose results show that the accidents of occurring often boiler furnace corner tube rupture are due to water circulation condition badness at operation.
四角切圆燃烧锅炉炉膛出口气流的残余旋转，是形成炉膛出口和水平烟道两侧烟温偏差的重要原因，可造成高温受热面热偏差和超温爆管。
In circular firing system, residual rotation of airflow at furnace outlet is the main reason for gas temperature deviation between two sides of furnace outlet and horizontal gas duct.
炉膛、U型钢分离器，以及过热器的外壳由顶部支撑、气密、全焊接的膜式管墙构成，因此不需要膨胀节。
The furnace, U-beam separator, and superheater enclosures are constructed entirely of top-supported, gas-tight, all-welded membraned tube walls which do not require hot expansion joints.
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