摘要
某20×104t/a重油催化裂化装置产物分布异常、能耗偏高,对反应-再生系统的核算和操作参数分析表明,主风量偏高,辅助燃烧室补燃干气是导致烧焦罐内线速高、水蒸气分压高、有效氧浓度低,引起催化剂水热失活、热崩,导致催化能力降低,反应转化率下降、产品分布恶化的主要原因。通过实施减少主风供应、停烧干气、改进余热锅炉操作等优化控制措施,改善了催化剂再生环境,提高了转化率,并降低了焦炭、干气产量,节能降耗效果明显。
The product distribution is abnormal and the energy consumption is higher of a 200×103 t/a residue catalytic cracking unit. The check computations of reaction-regeneration system and the analysis of the operation parameters show that the higher amount of main air flow and the after burning of dry gas in the auxiliary combustion chamber lead to higher line rate in the coke burning drum, higher steam partial pressure and lower effective concentration of O2, which are the reasons of hydrothermal deactivation and thermo-collapse of catalyst, lower catalytic ability, lower reaction conversion and bad product distribution. The product distribution and reaction conditions of reactor-regenerator system are advanced through optimizing the operation parameters and revamping some equipment such as decreasing the main air flow and stopping burning dry gas in the auxiliary burner, so the coke yield and the dry gas production are decreased, which gains distinct energy-saving and low material consumption.
出处
《石油与天然气化工》
CAS
CSCD
2009年第5期396-399,405,共5页
Chemical engineering of oil & gas
关键词
催化裂化
反应-再生系统
操作参数
标定核算
catalytic cracking, reaction-regeneration system, operation parameters, calibration result
