化学清洗技术在延迟焦化装置分馏系统的应用-石油与天然气化工.docVIP

化学清洗技术在延迟焦化装置分馏系统的应用 王航空，雷 亮，肖知俊，成 林 （中国石油天然气股份有限公司克拉玛依石化分公司，克拉玛依 834000） 摘? 要：克拉玛依石化公司焦化装置SureClean4231复合清洗剂，FeS，为检修施工提供了安全的作业环境，加快了检修进度，达到了预期目的，可以保证延迟焦化装置开工以后，分馏系统节能增收，高效运行。该方法值得进一步推广和运用柠檬OF CHEMICAL CLEANING TECHNIQUE FOR DISTILLATION SYSTEM IN DELAYED COKER Wang Hangkong, Lei Liang, Xiao Zhijun, Cheng Lin (PetroChina Karamay Petrochemical Company, Karamay 834003) Abstract The chemical cleaning technique for heavy oil foulings was adopted in delayed coking unit of PetroChina Karamay Petrochemical Company to clean oil and coke fouling from pipe and equipment during downtime. SureClean4231 complex cleaner which major component was citric acid was used in the distillation system.The cleaning processes included steam-chemical injection cleaning, water-chemical injection cleaning, water cleaning and passivation.The results showed that after the advanced chemical cleaning technique were applied, all kinds of foulings were cleaned out effectively such as heavy oil foulings, heavy oil foulings, light oil foulings, salt foulings, rust foulings and coke foulings. The unit was very clean and had no dead angle. Light hydrocarbon, sulfureted hydrogen，carbon monoxideiron monosulfide were cleans out. So the process provided safe work environment and quick maintenance operation. The expected effect was met effectively. So the technique was able to ensure the distillation system high-efficiency operation with low consumption of energy and high liquid yield. It was worth spreading and exercising widely. Key Words: delayed coker；distillation systemchemical cleaning technique；citric acid；fouling 2～3 年的运行后，在塔、换热器、容器、管线等设备内部及表面会沉积大量油泥、油浆、渣油、催化剂粉尘及FeS等污垢。而传统的人工高压水射流清洗和机械清洗由于存在费时、费力及效果差等诸多缺点，正逐渐被化学清洗技术所取代。目前，化学清洗技术对单台设备和轻油系统应用较多，但对重油装置系统的研究较少，而且应用效果不太理想。近年来,随着国内化学清洗技术的发展,新型化学清洗剂技术有了长足的进步，逐步用有机酸取代了无机酸，复合清洗剂取代了单一清洗剂,其应用领域也不断拓宽［1］。一些用于清除重油、轻油垢、Fe2O3、FeS等的绿色有机清洗剂取得了很好的清洗效果，有较好的推广应用前景。 1 危害分析 延迟焦化装置是典型的重油加工装置，在生产过程中，重油、轻油垢、无机盐垢、锈垢及焦泥等不断在塔盘、管线及设备表面沉积，引发塔盘效率降低，收率降低,生产过程能耗增加,设备热传导率降低及产生腐蚀缩短设备