低碳烃蒸汽重整制氢新工艺及操作优化研究
Research on the new process for low-carbon hydrocarbon steam reforming hydrogen production and operational optimization
王萍平 1郝涛远 2李国庆1
作者信息
- 1. 华南理工大学化学化工学院,广东省 广州市 510000
- 2. 山东京博石油化工有限公司,山东省滨州市 256600
- 折叠
摘要
针对烃类重整蒸汽制氢工艺转化气能量降级使用、原料气压缩功耗大的问题,提出了一种低碳烃膨胀透平集成制氢工艺.该工艺以炼油厂过剩低碳液态烃为原料,增压功耗较低,在转化炉出口设置膨胀透平,回收转化气的高温高压热能和压力能后再送余热锅炉产汽,同时回收中变气余热以加热液相原料.使用Aspen Plus V11对新工艺进行了全流程模拟,探求其原料组成、反应压力、反应温度、蒸汽碳比对装置热效率、能耗和CO2排放量的影响.基于模拟数据,采用非支配排序遗传算法NSGA-Ⅱ对新工艺进行了多变量多目标优化.计算表明,某液化石油气进料量为8.756 t/h的新工艺,最优操作工况下产氢2 636.8 kg/h、发电8 870.2 kW·h/h,生产1 t H2综合能耗2 892.9 kgoe、装置热效率71.63％、CO2排放29 984.6 kg/h,较优化前工况综合能耗降低、产氢量增加.
Abstract
A low-carbon hydrocarbon expander turbine integrated hydrogen production process is pro-posed to address the issues of degraded use of the converted gas energy and high compression power consump-tion of the feed gas in the steam reforming hydrogen production process.This process uses surplus low-carbon liquid hydrocarbons from refineries as the feedstock,with lower compression energy consumption.An expander turbine is installed at the outlet of the reformer furnace to recover heat energy and pressure energy from the high-temperature and high-pressure reformed gas,then sending it to the waste heat boiler for steam produc-tion.Simultaneously,waste heat from medium-temperature shift gas is recovered to preheat the liquid-phase feedstock.We establish a model of the new process using Aspen Plus V11 to explore the impact of feedstock composition,reaction pressure,reaction temperature,and steam-to-carbon ratio on thermal efficiency,energy consumption,and CO2 emissions.Based on simulation data,a multi-objective optimization of the new process is performed using the non-dominated sorting genetic algorithm(NSGA-Ⅱ).The calculations indicate that for a new process with LPG feedstock of 8.756 t/h,under optimal operating conditions,the hydrogen pro-duction is 2,636.8 kg/h,electricity generation is 8,870.2 kW,integrated energy consumption for one ton H2 is 2,892.9 kgoe,thermal efficiency is 71.63％,and CO2 emission is 29,984.6 kg/h.Compared to the initial condition,integrated energy consumption is reduced by 3.08％,and hydrogen production is increased by 30.55％.
关键词
低碳烃/蒸汽重整制氢/转化温度/反应压力/蒸汽碳比/综合能耗/CO2排放量/热效率Key words
low-carbon hydrocarbon/steam reforming to produce hydrogen/conversion temperature/re-action pressure/steam-to-carbon ratio/integrated energy consumption/CO2 emission/thermal efficiency引用本文复制引用
出版年
2025
NETL
NSTL
万方数据