Abstract: Tianjin Petrochemical's 1.3 MTPY wax oil hydrocracking unit started construction in 2007 and was successfully started up in December 2009. In 2016, the fractionation tower was shut down and the fractionation furnace was extinguished. Extinguishing the reaction furnace is a symbol of efficient operation of the hydrocracking unit, which is not only a reflection of energy conservation but also a technological advancement. At the beginning of 2024, it was planned to extinguish the reaction furnace. After extinguishing the reaction furnace, due to the fact that the self-produced 1.0 MPa steam did not reach the superheated state and could not be directly integrated into the 1.0 MPa steam pipeline network, and the hydrogen sulfide stripping tower used superheated steam for stripping, it was necessary to send the self-produced 1.0 MPa steam to the 0.45 MPa steam pipeline network. Therefore, a new process flow of self-produced 1.0 MPa steam to the 0.45 MPa steam pipeline network was added. The 1.3 MTPY wax oil hydrocracking unit can reduce fuel gas consumption by 400 m3/h after extinguishing the reaction furnace, achieving an annual efficiency increase of 11 million yuan. Before extinguishing the reaction furnace, it is necessary to conduct feedstock analysis and heat calculation. Attention should be paid to maintenance after extinguishing the reaction furnace to achieve high-quality extinguishing of the reaction furnace.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">wax oil hydrocracking unit, reaction furnace, extinguishing, heat balance, steam, technological processes, refined oil sulfur content, operation and maintenance

摘要： 中石化（天津）石油化工有限公司１．３Ｍｔ／ａ蜡油加氢装置于２００７年开工建设，２００９年１２月开车成功，２０１６年分馏塔停运，熄灭分馏炉。熄灭反应炉是加氢装置高效运行的标志，不仅是节能的体现，也是技术的进步。２０２４年年初计划熄灭反应炉，熄灭反应炉后，由于自产的１．０ＭＰａ蒸汽达不到过热状态，不能直接并入１．０ＭＰａ蒸汽管网，且硫化氢汽提塔所用汽提蒸汽为过热蒸汽，需要将自产的１．０ＭＰａ蒸汽送至０．４５ＭＰａ蒸汽管网，所以新增了自产的１．０ＭＰａ蒸汽至０．４５ＭＰａ蒸汽管网工艺流程。该１．３Ｍｔ／ａ蜡油加氢装置熄灭反应炉后能够减少４００ｍ３／ｈ的燃料气消耗，实现年增效１１００万元。熄灭反应炉前需要进行原料分析及热量核算，熄灭反应炉后注意维护，以实现高质量熄灭反应炉。

关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">蜡油加氢装置, 反应炉, 熄灭, 热量平衡, 蒸汽, 工艺流程, 精制油硫含量, 运行维护