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从对一台ＤＺＬ６．０－１.２５蒸汽锅炉近前炉门附近两侧炉膛水冷壁管多次发生局部爆管事故的调查出发，对该锅炉侧集箱排污系统存在的设计缺陷进行了流动分析、计算。计算表明，排污时前段集箱内流速过低是造成该段集箱区水渣大量沉积致使该区水冷壁管因水渣堵塞而引发局部爆管的根本原因。对侧集箱不同部位增开排污口方案进行的计算表明，在集箱前端增开排污口可有效地改善排污时该处集箱内水的流动性，从而消除泥渣沉积隐患。改造方案实施后，经多年的锅炉安全运行实践也证明了该方案的有效性。
Based on the investigation of several local squib accidents on the water-cooled wall tubes in the furnace near the front door of a DZL6.0-1.25 steam boiler, the design defects of the header tank sewage system were analyzed. , Calculate. The calculation shows that the excessive flow velocity in the header before the blowdown is the root cause of the local tube burst caused by the clogging of the water cooled wall tube in this section. The calculation of the plan of opening the sewage outlet in different parts of the side header shows that the increase of the sewage outlet in the front of the header can effectively improve the fluidity of the water in the header when the sewage is discharged and thus eliminate the hidden danger of sludge deposition. After the implementation of the reform program, after many years of safe operation of the boiler also proved the effectiveness of the program.