加氢反应过程对炼油厂加氢系统氢耗影响的分析

降低氢气消耗对炼油厂节能操作具有重要意义。笔者从加氢反应系统整体出发，通过耦合各加氢反应装置的脱硫、脱氮和芳烃饱和动力学过程，研究了反应温度和反应压力对加氢反应系统总氢耗的影响。以某炼油厂加氢反应系统为例，针对蜡油加氢、催化裂化、催化柴油加氢和催化汽油加氢的耦合加氢反应系统，提出了通过耦合加氢反应脱硫动力学过程降低炼油厂氢气网络氢耗的分析方法。采用该分析方法可使总氢耗降低2230 m3/h，降幅为728%；脱硫氢耗降低200 m3/h，降幅为2.64%；脱氮氢耗降低327 m3/h，降幅为9.28%；芳烃饱和氢耗降低1404 m3/h，降幅为11.13%。

Analysis of Effects of Hydrogenation on Hydrogen Consumption of Hydrotreating System in a Refinery

Reducing hydrogen consumption is of great significance to energy saving operations in a refinery. In order to reduce the hydrogen consumption of the hydrotreating (HDT) system, the effects of reaction temperature and pressure on hydrogen consumption were studied by coupling the hydrodesulfurization (HDS), hydrodenitrogenation (HDN) and aromatics hydrogenation (HDA) kinetics from a systematic point of view. A novel method to reduce the hydrogen consumption of HDT system, including the vacuum gas oil (VGO) HDT unit, fluid catalytic cracking (FCC) unit, FCC diesel HDT unit and FCC gasoline HDT unit was proposed by taking the HDS and HDN kinetics into consideration. The results of an actual refinery showed that the total hydrogen consumption of 2230 m3/h for HDT system was reduced with the decrease percentage of 728%, the hydrogen consumptions of 200,327 and 1404 m3/h for HDS, HDN and HDA were reduced, respectively, with the decrease percentage of 264%, 928% and 1113%.