论文部分内容阅读
目前,在用的锅壳式卧式外燃锅炉(俗称卧式快装炉),大部分均系1992年新的《热水锅炉安全技术监察规程》颁发前两年的产品,普遍存在着二回程入口管板裂纹或泄漏问题。此问题的明显特征是管板孔桥、管极与烟管的焊口、烟管端头裂纹并造成泄漏。轻者加剧管板的腐蚀,减少锅炉使用寿命、隐含事故因素;重者漏水严重、造成停炉及安全事故、危及用户。其原因分析起来是多方面的,但主要原因是二回程入口烟温很高,而锅筒内水温不过几十摄氏度,因此在管板内外侧形成很大的温差,达600～10O0℃,甚至
At present, most of the shell-type horizontal external combustion boilers (commonly known as horizontal fast furnaces) in use are those two years prior to the issuance of the new “Hot-water Boiler Safety Technology Supervision Regulations” issued in 1992. There are two Return inlet tube plate cracks or leaks. The obvious feature of this problem is the tube plate hole bridge, pipe and smoke pipe welding mouth, pipe end cracks and cause leakage. Light exacerbated the corrosion of the tube plate to reduce boiler life, implicit accident factors; serious serious water leaks, resulting in shutdown and safety incidents, endangering users. The reasons for the analysis is multifaceted, but the main reason is that the second round of smoke inlet temperature is very high, but the water temperature in the drum tube, but dozens of degrees Celsius, so the tube plate inside and outside the formation of a large temperature difference of 600 ~ 10O0 ℃, or even