中国石化裂解炉能耗现状分析与节能改造

Situation Analysis and Energy Conservation Innovations of Cracking Furnaces in SINOPEC

中国石化裂解炉运行状况测试结果表明,目前裂解炉普遍存在排烟温度、排烟氧含量和炉体表面温度偏高以及热效率偏低等现象,严重影响了中国石化裂解炉的能耗水平。通过采用优化裂解炉操作条件、优化工艺及结构等措施对裂解炉进行改造,可实现装置节能降耗的目的。应用上述措施,对茂名某裂解炉进行节能改造,通过加装扭曲片强化传热管、改换炉管结构、改变对流段结构、采用新型燃烧器、更换辐射段衬里、共用引风机及改造文丘里分配器等措施,使裂解炉的进料量增加了9%,排烟温度降低53.6℃,炉管壁温降低40℃,热效率提高1.77百分点,裂解炉运行周期延长1倍以上。

The test results of cracking furnaces running of SINOPEC indicates that some furnaces have the drawbacks of high flue gas temperature, high oxygen content in the flue gas and high firebox outside wall temperature, which leads to low thermal efficiency. The energy conservation can be achieved by optimizing the operation conditions, process design and furnace structure. The reforming of a cracking furnace in SINOPEC Maoming petrochemical company for energy saving was carried out by adding heat transfer tubes with twisted tapes, changing the structure of the furnace tubes, transforming the structure of the convection section, using new burner, replacing the lining of the radiation section, sharing induced fan and modifying the Venturi distributor. The results showed that after the reforming, the feed rate increased by 9%, the exhaust gas temperature decreased by 53.6 ℃, the tube wall temperature reduced by 40 ℃, the thermal efficient was improved by 1.77 percentage point and the operating cycle extended by more than 100%.