高温除尘滤袋用文丘里管的失效原因及改进措施
|
摘要
采用化学成分分析,金相组织与断口形貌观察等方法分析了除尘滤袋用文丘里管在某高温气体除尘设备中的失效原因。结果表明:文丘里管在制备过程中易出现耐蚀性较差的碳化物(M23C6)和形变马氏体组织,在应力及腐蚀介质环境的作用下容易成为裂纹的萌生点,导致脆性断裂。针对这一情况,对文丘里管进行固溶处理及工艺条件的改进,使得设备运行正常,排放达到要求。
Chemical composition analysis,metallographic structure and fracture morphology observation were used to analyze the failure reasons of the venturi used in the dust filter bag in a high temperature gas dedusting equipment.The results showed that carbide(M23C6)and deformed martensite structure with poor corrosion resistance,which was easy to produce during the preparation of venturi,tended to become the crack initiation point under the action of stress and corrosive medium environment,leading to brittle fracture.In response to this situation,measures of annealing treatment of the venturi and improvement of process conditions made the equipment operate normally and the discharge met the requirements.
Chemical composition analysis,metallographic structure and fracture morphology observation were used to analyze the failure reasons of the venturi used in the dust filter bag in a high temperature gas dedusting equipment.The results showed that carbide(M23C6)and deformed martensite structure with poor corrosion resistance,which was easy to produce during the preparation of venturi,tended to become the crack initiation point under the action of stress and corrosive medium environment,leading to brittle fracture.In response to this situation,measures of annealing treatment of the venturi and improvement of process conditions made the equipment operate normally and the discharge met the requirements.
引文
[1]林莉君,陈海焱,周喜,等.脉冲喷吹滤筒除尘器清灰性能的实验研究[J].暖通空调,2009,39(4):148-151.
[2]郭莎莎.袋式除尘器滤料的选择和技术发展[J].非织造布,2006,14(6):26-29.
[3]吴志平.新型袋式除尘器的设计[J].南方农机,2015(1):60-61.
[4]刘伟,李强,焦德志,等.冷轧301L奥氏体不锈钢的变形和应变硬化行为[J].金属学报,2008,44(7):775-780.
[5]夏渊.奥氏体不锈钢冷轧板材成形性能及耐蚀性能研究[D].兰州:兰州理工大学,2011.
[6]叶丽燕.亚稳态奥氏体不锈钢的冲压成形特性研究[D].上海:上海交通大学,2013.
[2]郭莎莎.袋式除尘器滤料的选择和技术发展[J].非织造布,2006,14(6):26-29.
[3]吴志平.新型袋式除尘器的设计[J].南方农机,2015(1):60-61.
[4]刘伟,李强,焦德志,等.冷轧301L奥氏体不锈钢的变形和应变硬化行为[J].金属学报,2008,44(7):775-780.
[5]夏渊.奥氏体不锈钢冷轧板材成形性能及耐蚀性能研究[D].兰州:兰州理工大学,2011.
[6]叶丽燕.亚稳态奥氏体不锈钢的冲压成形特性研究[D].上海:上海交通大学,2013.