反应器外循环泵机械密封失效分析及改造

分析某装置反应器循环泵机械密封频繁泄漏量及端面温度高的原因。指出介质端密封载荷系数选择不当,导致密封端面比压偏小,是介质侧密封失效的主要原因;泵送环输送能力低,循环隔离液不能有效将密封摩擦热传递出去是导致大气侧端面温度高过高的主要原因。通过调整载荷系数和提高机械密封泵送能力,密封改造后使用寿命大幅提高,解决了循环泵机械密封频繁泄漏的问题。

Analysis and Renovation of Mechanical Seal Leak on Circulation Pump outside the Reactor

The reason for the frequent leak on the mechanical seal of the circulating pump outside the reactor and for the high temperature on the seal end face was analyzed.Inappropriate load factor of the medium side seal leading to the low pressure on the seal end face was the main reason for the leakage of the seal.High temperature on atmospheric side was mainly caused by the low delivery capacity of pump ring and failure friction heat transfer of cycle fluid.By adjusting the load factor and improving the delivery capacity of the mechanical seal,the life of the mechanical seal is increased greatly after the renovation and the problem of frequently leak on mechanical seal of the circulating pump is solved.