催化裂化提升管反应器噎塞事故的处理和预防

The Treatment and Precaution of FCC Riser Reactor Blocking Accident

介绍了催化裂化装置最大化生产异构烷烃改造以后操作中出现的噎塞现象,分析了发生噎塞的主要原因在于加工负荷小、反应深度低、提升介质少、再生催化剂的微反活性低,造成了提升管向上的推动力不够,在第二反应区藏量较多时,推动力小于阻力,产生噎塞。指出避免发生噎塞的主要措施有控制提升管底部提升介质、加工量、原料性质、反应深度、第二反应区藏量、催化剂活性和粒度以及保证第二反应区线速在5m/s以上等。

It was introduced that the blocking phenomenon that occurred during the operation after MIP innovation of catalytic cracking unit, and analyzed the main causes of the blocking including the small processing load, low percentage of conversion, the small amount of rising medium as well as the low microreactivity of the regenerated catalysts. When the push upward of the riser was not sufficient, the more stock stagnated in the second reaction area, the driving force was less than resistance, which causes the blocking. It also pointed out the main measures to avoid the blocking were to control the rising medium at the bottom of the riser, the capacity, the properties of raw material, the percentage of conversion, the stock in the second reaction area, the activity and particle size of the catalysts, and to ensure the line speed in the second reaction area is beyond 5 m/s meanwhile.