催化装置催化剂跑损诊断和处理

Diagnosis and treatment of the runoff of the catalysts in catalytic cracking unit

找到催化剂跑损的原因和位置,减少和避免催化剂跑损,对催化装置的良好运行十分重要。分析了催化剂粒径分布、机械强度、重金属污染能力、水热稳定性等催化剂自身原因以及原料组成变化、生产操作不当等操作原因。结果表明,回收系统问题、流化分布问题、设备固有问题、设备出现异常等设备问题是造成催化剂跑损的主要因素。通过分析新鲜催化剂、待生催化剂、再生催化剂、三旋回收催化剂等筛分组成以及油浆固含量和催化装置仪表的数值诊断出催化剂跑损位置,提出减少和避免催化剂跑损的主要措施。

It is very important to find out the cause and location of the catalyst loss in the catalytic devices and to reduce and avoid the catalyst loss. The cause of catalyst performance, including catalyst particle size distribution, mechanical strength, heavy metal pollution capacity, and hydrothermal stability were analyzed. At the same time, the reasons for the composition changes of raw materials and improper operations were also introduced. The results showed that the problems of recycling system, fluid distribution, device inherently fail and equipment abnormity were the main factors of causing the catalyst consumption. Simultaneously, the position of the catalyst loss was determined by analyzing the particle size distribution of fresh agent, spent agents, and recycling agents as well as the oil slurry solid contents and the numerical value of catalytic device in catalytic devices. The main measures of reducing and preventing the runoff of the catalysts were put forward.