论文部分内容阅读
四、炉膛的强度、刚度和密封无论是微正压锅炉还是具有鼓风和引风的平衡通风锅炉,在正常运行工况下炉膛和尾部烟道都承受着一定的压力,在炉膛灭火引起的爆燃工况下会产生更高的冲击压力。为了保护水冷壁和蒸汽冷却墙免受损坏,必将采用刚性梁来加固炉墙。国外炉子对刚性梁的设计十分讲究,与国内的设计现状存在着较大的差别,其主要表现在对炉膛设计的压力选取、刚性梁最大许用间距的计算、刚性梁的挠度分析、一些特殊结构的处理以及炉顶密封等问题上。
Fourth, the furnace strength, stiffness and sealing Whether it is a micro-positive pressure boiler or a balanced ventilation with the blast and the induced draft, the furnace and tail flue under normal operating conditions are under a certain pressure, caused by fire in the furnace Deflagration conditions will have a higher impact pressure. In order to protect the water wall and the steam cooling wall from damage, rigid beams will be used to reinforce the wall. Abroad, the design of rigid beam is very particular about the rigid beam, and the design status of the domestic there is a big difference, which is mainly manifested in the selection of the pressure of the furnace design, calculation of the maximum allowable spacing rigid beams, rigid beam deflection analysis, some special Structure handling and roof sealing and other issues.