| 摘要: |
| 目的 优化某高硫原油炼厂工艺流程，生产低硫石油焦。方法 通过分析某高硫原油炼厂石油焦生产工艺流程及延迟焦化混合原料与焦炭中硫含量数据的规律，探索通过优化延迟焦化混合原料及石油焦生产工艺流程实现生产低硫石油焦的可行性，并进行工业实践验证。结果 延迟焦化混合原料中硫含量与石油焦中硫含量存在明显的正相关关系，形成预测石油焦中硫含量的经验公式，验证后与近期实测石油焦中硫含量相符；利用经验公式测算，渣油加氢?延迟焦化组合工艺是解决当前加工高硫原油条件下生产低硫石油焦的有效途径，在加工质量分数为20%的减压渣油时仅能生产3号石油焦，在仅加工催化油浆和脱硫渣油时，通过调整混合原料比例可以生产2号石油焦。结论 按照渣油加氢?延迟焦化组合工艺方案中的混合原料配比，该炼厂在加工高硫原油的条件下，延迟焦化装置成功生产出2B号石油焦，验证了生产方案的可实施性。 |
| 关键词: 高硫原油 低硫石油焦 延迟焦化 脱硫渣油 催化油浆 组合工艺 |
| DOI：10.3969/j.issn.1007-3426.2025.01.003 |
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| Exploration and practice of producing low-sulfur petroleum coke in high-sulfur crude oil refineries |
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Zhihe YANG, Jinyuan HU, Dunji WENG, Xiaofei HE, Yan XU
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PetroChina Yunnan Petrochemical Co., Ltd., Kunming, Yunnan, China
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| Abstract: |
| Objective The aim is to optimize the process flow of a high-sulfur crude oil refinery to produce low-sulfur petroleum coke. Method By analyzing the process flow of petroleum coke production in a refinery, as well as the law of sulfur content data in delayed coking mixed feedstock and coke, the feasibility of producing low-sulfur petroleum coke was explored by optimizing the delayed coking mixed feedstock and petroleum coke production process flow and verified by industrial practice. Result There was an obvious positive correlation between the sulfur content in delayed coking mixed feedstock and the sulfur content in petroleum coke, forming an empirical formula to predict the sulfur content in petroleum coke, which was verified to align with recent sulfur content in petroleum coke. By using the empirical formula, the residue hydrotreating-delayed coking combination process was an effective way to solve the problem of producing low-sulfur petroleum coke under the current conditions of processing high-sulfur crude oil, and it was capable of producing only 3# petroleum coke when processing 20 wt% vacuum residue. When only catalytic cracking slurry and desulfurization residue were processed, 2# petroleum coke could be produced by adjusting the ratio of feedstock. Conclusion According to the feedstock ratio in the residue hydrotreating-delayed coking combination process scheme, the delayed coking unit of this refinery successfully produced 2B# petroleum coke under the condition of processing high-sulfur crude oil, which confirmed the feasibility of the production scheme. |
| Key words: high-sulfur crude oil low-sulfur petroleum coke delayed coking desulfurization residue catalytic slurry combination process |
