石油炼制与化工 ›› 2025, Vol. 56 ›› Issue (2): 46-52.

• 加工工艺 • 上一篇    下一篇

1.0 Mt/a汽油轻馏分优化利用装置运行分析

王红超1,龙有2,杨彦强1,匡良斌2,王辉国1,蒋志超1,张文1   

  1. 1. 中石化石油化工科学研究院有限公司
    2. 中国石化茂名分公司
  • 收稿日期:2024-04-22 修回日期:2024-10-11 出版日期:2025-02-12 发布日期:2025-01-16
  • 通讯作者: 王辉国 E-mail:wanghg.ripp@sinopec.com

OPERATION EFFECTIVENESS OF THE 1.0 Mt/a LIGHT GASOLINE FRACTION OPTIMIZATION UTILIZATION UNIT

  • Received:2024-04-22 Revised:2024-10-11 Online:2025-02-12 Published:2025-01-16

摘要: 组分炼油对于建造现代化的炼化一体化装置具有重要意义,为充分利用C5、C6轻石脑油资源,中石化石油化工科学研究院有限公司开发了汽油轻馏分优化利用技术,该技术主要由RAN-520吸附剂、Recane工艺及RACS控制系统、吸附塔格栅RACI03内构件等核心技术构成。某石化企业1.0 Mt/a汽油轻馏分优化利用装置于2023年5月开车成功,并于2024年3月进行了100%负荷装置考核。考核结果表明,C5、C6轻石脑油经吸附分离后,抽出油中正构烷烃质量分数为95.89%,可作为优质蒸汽裂解原料;抽余油中异构烷烃质量分数为92.77%,RON达到86.9,比原料RON提高15.1;装置能耗为27.44 kgOE/t(1kgOE=41.86MJ),扣除加工成本后,每年可增加收益约40 585.8万元。对装置运行数据进行分析,发现由于吸附和解吸过程的存在,吸附塔温度呈现周期性变化;随碳数增加,正构烷烃吸附强度增加,吸附收率提高。5A分子筛表面对苯有一定的吸附作用,为降低苯对后续产品质量的影响,提出了3种解决措施。

关键词: 汽油轻馏分, C5, C6, 吸附分离, 正构烷烃, 异构烷烃

Abstract: Component refining is of great significance for the construction of modern integrated refining and petrochemical facilities. To fully utilize C5 and C6 light naphtha resources, SINOPEC Research Institute of Petroleum Processing Co., Ltd. has developed a technology for optimized utilization of gasoline light fractions. This technology primarily consists of core components such as the RAN-520 adsorbent, the Recane process, the RACS control system, and the adsorption tower grid RACI03. A 1.0 Mt/a light gasoline fraction optimization unit at a petrochemical company successfully started up in May 2023,and a 100% load unit assessment was conducted in March 2024. The assessment results showed that after adsorption separation, the mass fraction of n-alkanes in the extracted oil reached 95.89%, making it an excellent feedstock for steam cracking. The mass fraction of iso-alkanes in the raffinate oil reached 92.77%, with a RON of 86.9, representing a 15.1 increase compared to the feedstock RON. The energy consumption of the facility was 27.44 kgOE/t(1kgOE=41.86MJ). After deducting processing costs, the annual revenue increased by approximately 405.858 million yuan. Analysis of the operational data revealed that due to the presence of adsorption and desorption processes, the temperature of the adsorption tower exhibited periodic changes. As the carbon number increased, the adsorption strength of n-alkanes increased, leading to higher adsorption yields. The surface of 5A molecular sieves has a certain adsorption effect on benzene. To minimize the impact of benzene on subsequent product quality, three solutions have been proposed.

Key words: light gasoline fraction, C5, C6, adsorption separation, normal alkane, iso-alkane