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柴油加氢分离塔改造措施及效益
Revamp of stripping column in diesel hydrocracking process
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- DOI:
- 作者:
- 石先谋1 ，高元龙1 ，马 驰1 ，冯刚鹏1 ，孟 春2 ，侯鹏成2
Shi Xianmou1 , Gao Yuanlong1 , Ma Chi1 , Feng Gangpeng1 , Meng Chun2 , Hou Pengcheng2
- 作者单位:
- 1.浙江石油化工有限公司；2.苏尔寿化工（上海）有限公司
1. Zhejiang Petroleum & Chemical Co., Ltd.; 2. Sulzer Chemtech (Shanghai) Co., Ltd.
- 关键词:
- 柴油加氢裂化；硫化氢腐蚀；分离塔内件设计；工艺包设计值；分离效率
diesel hydrocracking; hydrogen sulfide corrosion; internal design; separation efficiency
- 摘要:
- 某炼化企业柴油加氢裂化装置汽提塔因分离效率不足，致使硫化氢、液化气等轻组分进入后续分馏塔，造成分馏塔顶压控制阀长期处于大开度状态，物料跑损严重，加剧了分馏塔的高浓度硫化氢腐蚀，对企业的安全生产和经济效益造成了显著影响。文中通过对汽提塔效率不足进行了诊断分析，重点分析了柴油加氢装置轻组分带入下游的原因以及精馏塔内件设计对工艺的影响，采用塔盘结构对汽提塔原 2段的散堆填料进行了改造。结果表明，改造后的处理能力，回流比，采出量，温度控制，压力控制等指标均优于工艺包设计值，保证了装置的安全生产，提高了企业的经济和环境效益。A diesel hydrocracking unit at a refinery experienced poor separation efficiency in its stripping column, leading to the un⁃desirable carryover of light components, including hydrogen sulfide and LPG, into the subsequent fractionation column. This opera⁃tional challenge necessitated the continuous operation of the fractionation column's top pressure control valve in a wide-open posi⁃tion, resulting in considerable product loss and severe corrosion due to high hydrogen sulfide concentration. These conditions pre⁃sented a significant risk to the plant's operational safety and economic performance. This paper focuses on the analysis of the reasonof light components carry down of the stripper column and the effect of column internals on the process performance, the trays areused to revamp the existing 2 beds of random packings. The results show that the capacity, reflux ratio, draw-off flowrate, tempera⁃ture control, pressure control etc.. are all better than the data in the process design package which ensures the safety of unit opera⁃tion and improves the economic and environmental benefits for the company.