Abstract:

An analysis was conducted on the reasons for the increase in catalyst dust in the 600,000 TPY CCR of PetroChina Changqing Petrochemical Company. It was found that poor mechanical strength of the catalyst, non-standard catalyst loading and equipment installation, and fluctuations in the operation of the catalyst regeneration unit were the main reasons for the increase in dust in the unit. The following measures should be taken: In the early stage of device operation, catalyst selection work and standardization of catalyst loading and unloading operations should be done well, and internal inspections of equipment pipelines should be strengthened. During the operation of the device, it should be ensured that the catalyst is steadily elevated; Replace the regeneration gas dryer and monitor the water content of the regeneration gas; Adjust the air volume for elution, strengthen the inspection of dust collectors, and ensure the effectiveness of elution; Optimize the regeneration of coke and adjust the temperature of the regeneration bed layer coke to not exceed 565 ℃.By implementing the above measures, there was no significant increase in catalyst dust in the reaction and regeneration system of the CCR. The daily catalyst dust amount decreased from the highest value of 2.1 kg/d to 1.0～1.3 kg/d, effectively solving the problem of increased dust in CCR and ensuring long-term safe and stable operation of the unit.

Key words: CCR, catalyst, dust, strength, elevated air, dryer, elutriation, over-temperature

摘要：

对中国石油长庆石化分公司600 kt/a连续重整装置催化剂粉尘增多的原因进行了分析，认为催化剂机械强度差、催化剂装填和设备安装不规范以及催化剂再生单元运行波动是造成装置粉尘增多的主要原因。采取措施：装置投用前期，做好催化剂选型工作，催化剂装卸操作标准化，加强设备管道内部检查；装置运行期间，保证催化剂稳定提升；更换再生气干燥器，监控再生气水含量；调整淘析风量，加强检查粉尘收集器，确保淘析效果；优化再生烧焦，调整再生床层烧焦温度，使其不超过565℃。通过实施上述措施，该连续重整装置反应和再生系统粉尘量未出现大幅增长，粉尘量由最高值2.1 kg/d降至1.0～1.3 kg/d,有效解决了连续重整装置粉尘增多的问题，保证了装置长周期安全平稳运行。

关键词: 连续重整装置, 催化剂, 粉尘, 强度, 提升风, 干燥器, 淘析, 超温