催化裂化装置再生器尾燃原因分析及优化措施

REASON ANALYSIS OF AFTERBURNING IN FCC REGENERATOR AND OPTIMIZATION MEASURES

针对中国石化扬子石油化工有限公司2.0Mt?a催化裂化装置再生器尾燃严重的情况,根据生产实际和烧焦理论,从装置生焦量、再生器内催化剂流化状态、催化剂内循环量、外取热量和助燃剂的使用等方面讨论了产生尾燃的原因并提出优化措施。结果表明:再生器尾燃主要是因为上述因素对烧焦罐的烧焦温度、焦炭反应时间、催化剂上炭分布产生影响,使CO无法在烧焦罐中完全燃烧,从而进入稀相段并发生剧烈反应造成的;通过调整装置生焦负荷、各再生催化剂输送管路中的输送风量、控制合适的催化剂内循环量和外取热量等措施可缓解再生器尾燃现象。

The reasons for the poor combustion of off-gas in generator of FCCU with capacity of 2.0 Mt/a in SINOPEC Yangzi Petrochemical Co. Ltd, were analyzed from factors of coke make, catalyst fluidized state in the regenerator, catalyst amount in circulation, external heat quantity, and combustion promoter used. These factors are proved to influence on the coke burning temperature in coke burning tank, the coke oxidation reaction time and the carbon distribution on the catalyst, resulting in incomplete combustion CO entering into the dilute phase and occurring a violent react ion. By adjusting the coke make of device, the air flow in the transportation pipeline for the regenerated catalyst, control the appropriate amount of catalyst in circulation and external heat, the burning of tail gas can he alleviated.