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延迟焦化工艺是加工渣油的重要手段,而焦炭塔是延迟焦化装置中的核心设备之一。其操作条件苛刻,在500℃的操作温度下,每48h进行1次从常温至操作温度的循环。由于塔体内、外壁温度不同给塔体带来了远高于焦炭塔材料的屈服极限的温差应力。国内现有的早年投用的焦炭塔已出现不少问题,焦炭塔鼓凸变形、筒体与裙座之间的焊缝等部位出现裂纹等。调查发现,焦炭塔塔体焊缝裂纹主要发生在筒体与裙座间的焊缝,因此,裙座与壳体连接的结构型式是焦炭塔设计的关键。本文对焦炭塔裙座的几种常用结构型式进行了对比,并介绍了一种新的结构型式,供大家参考。
Delayed coking process is an important means of processing residue, and coke drum is delayed coking device in one of the core equipment. Its operating conditions harsh, at 500 ℃ operating temperature, once every 48h from normal temperature to operating temperature cycle. Due to the different temperature inside and outside the tower, the temperature difference between the tower body and the tower is much higher than the yield point of the coke tower material. There are many problems that coke towers have been put into operation in the early years in our country. The coke drum bulges and deforms, cracks occur in the weld between the cylinder and the skirt. The investigation found that the weld cracks in the coke drums mainly occurred in the weld between the cylinder and the skirt. Therefore, the structure type of the skirt and the shell was the key to the design of the coke drum. In this paper, several common structure types of coke tower skirt are compared, and a new type of structure is introduced for your reference.