重整反应系统存在问题及改造措施

Problems in CCR reaction system and trouble-shouting measures

中国石油化工股份有限公司洛阳分公司0.7Mt/a连续重整装置在运行过程中存在着装置能耗偏高、运行不稳定、处理量达不到要求等问题。分析认为循环氢压缩机操作弹性小、原纯逆流立管式进料换热器E201换热效率低、重整反应加热炉热负荷不足导致反应温度达不到设计要求等是主要原因。在大检修期间实施了压缩机更新、反应加热炉改造、使用高效进料板式换热器等多项措施。近两年的运行及标定结果表明,改造消除了装置运行不稳定的安全隐患,处理量达到了105%～110%以上负荷,能耗降低了778.6MJ/t以上,生成油芳烃含量、氢产率等指标也得到了明显提高,实现了装置挖潜增效和长周期平稳生产。

The problems of high energy consumption, unstable operation and limited throughput existed in the operation of a 700,000 tons/year continuous catalytic reforming unit （CCR） of Sinopec Luoyang Com- pany. The analysis concluded that the culprits were the small operating flexibility of recycle compressor, the low heat exchange efficiency of the original countercurrent vertical tube type feed heat exchanger E201, the in- sufficient heat duty of the reforming reactor heater which led to the failure of reaction temperature to reach the design requirement, etc. During the overhaul, the recycle compressor was replaced. Reactor heater was revamped and the high-efficiency feed heat exchanger was installed. The two years＇ operation and performance test results show that the revamping has eliminated the safety hazards in unit operation. The unit can be operated at 110% of design capacity. The energy consumption has been reduced by over 418.68 MJ/t. The aromatic content in reformate and hydrogen production have also been improved. The economic benefit of unit opera- tion is raised and long-term stable operation is realized.