【Mechanical Equipment Technology Exchange Edition】Mechanical Equipment 【Daily Question】20190810
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Question: What are the causes of short-term overheating? There are no answers provided for this series of posts; fellow netizens are free to share their own opinions – just reply with what you understand. Replies earn rewards ranging from 5 to 15 points; all forum members are welcome to participate actively and support the development of the forum! ! ! Chemical Equipment and Machinery
Short-term overheating tube failures mostly occur near the combustion zone of the cold wall tubes as well as on the fire-facing side near the injectors and on the slag tubes; they also occur occasionally in the economizers and the screen superheaters of certain high-pressure boilers. It is mainly caused by overloading, improper operation, or blockages inside the pipes. Overloading causes the outlet temperature of the convective superheater to rise generally, exacerbating the overheating condition and thus accelerating tube creep ； Abnormal startup leading to drastic changes in combustion, rapid pressure rise, or flameout and explosion in the furnace can all cause the tubes to overheat ； Blockages caused by debris or scale inside the pipes can lead to poor circulation of steam, resulting in localized overheating of the pipes and rapid pipe rupture.
Short-term overheating tube failures mostly occur near the combustion zone of the cold wall tubes as well as on the fire-facing side near the injectors and on the slag tubes; they also occur occasionally in the economizers and the screen superheaters of certain high-pressure boilers. It is mainly caused by overloading, improper operation, or blockages inside the pipes. Overloading causes the outlet temperature of the convective superheater to rise generally, exacerbating the overheating condition and thus accelerating tube creep ； Abnormal startup leading to drastic changes in combustion, rapid pressure rise, or flameout and explosion in the furnace can all cause the tubes to overheat ； Blockages caused by debris or scale inside the pipes can lead to poor circulation of steam, resulting in localized overheating of the pipes and rapid pipe rupture.
Short-term overheating tube failures mostly occur near the combustion zone of the cold wall tubes as well as on the fire-facing side near the injectors and on the slag tubes; they also occur occasionally in the economizers and the screen superheaters of certain high-pressure boilers. It is mainly caused by overloading, improper operation, or blockages inside the pipes. Overloading causes the outlet temperature of the convective superheater to rise generally, exacerbating the overheating condition and thus accelerating tube creep ； Abnormal startup leading to drastic changes in combustion, rapid pressure rise, or flameout and explosion in the furnace can all cause the tubes to overheat ； Blockages caused by debris or scale inside the pipes can lead to poor circulation of steam, resulting in localized overheating of the pipes and rapid pipe rupture.
instantaneous overload； Interruption of cooling water, etc
Short-term overheating tube failures mostly occur near the combustion zone of the cold wall tubes as well as on the fire-facing side near the injectors and on the slag tubes; they also occur occasionally in the economizers and the screen superheaters of certain high-pressure boilers. It is mainly caused by overloading, improper operation, or blockages inside the pipes. Overloading causes the outlet temperature of the convective superheater to rise generally, exacerbating the overheating condition and thus accelerating tube creep ； Abnormal startup leading to drastic changes in combustion, rapid pressure rise, or flameout and explosion in the furnace can all cause the tubes to overheat ； Blockages caused by debris or scale inside the pipes can lead to poor circulation of steam, resulting in localized overheating of the pipes and rapid pipe rupture.
Short-term overheating tube failures mostly occur near the combustion zone of the cold wall tubes as well as on the fire-facing side near the injectors and on the slag tubes; they also occur occasionally in the economizers and the screen superheaters of certain high-pressure boilers. It is mainly caused by overloading, improper operation, or blockages inside the pipes. Overloading causes the outlet temperature of the convective superheater to rise generally, exacerbating the overheating condition and thus accelerating tube creep ； Abnormal startup leading to drastic changes in combustion, rapid pressure rise, or flameout and explosion in the furnace can all cause the tubes to overheat ； Blockages caused by debris or scale inside the pipes can lead to poor circulation of steam, resulting in localized overheating of the pipes and rapid pipe rupture.
Overloading, improper operation, blockage inside the pipe