HUANG Junjie. Modification of secondary stage desuperheater for superheater in a 1025t/h boiler[J]. Thermal power generation, 2014, 43(3): 113-115.DOI:
1025t/h锅炉过热器二级减温器改造
摘要
恒运电厂1 025t/h锅炉过热器二级减温器内套筒上弧形扁铁脱落导致后屏过热器接连爆漏。对此
将其悬臂式喷管结构改造为喷管两端夹持式
消除了悬臂式喷管的高频振动隐患
避免了交变热应力过分集中在喷管根部导致喷管断裂进而引发受热面暴漏的事故。
Abstract
The arc flat iron on inner sleeve of the secondary desuperheater of the 1 025t/h boiler in Hengyun Power Plant fell off
resulting in successional tube burst in the platen superheater.Analysis shows that
due to high frequency vibration of the cantilever nozzle
the alternating thermal stress concentrates intensively in bottom of the nozzle
leading to fracture on the nozzle and then burst of the tubes.Thus
the cantilever nozzle was transformed into both-end-clamp nozzle.