考虑新氢纯度的氢网络夹点分析

发布时间：2018-02-09 03:15

本文关键词： 氢网络新氢摩尔分数制氢模拟优化　出处：《化工进展》2017年03期 　论文类型：期刊论文

【摘要】：基于夹点法,对考虑新氢纯度的氢网络集成进行了研究。利用Aspen Plus建立了天然气蒸气转化制氢过程的模拟模型。在考虑原料气、除氧水、冷却水、副产蒸气、变压吸附、压缩机用电等主要能耗的前提下,计算出系统总费用,对整个过程进行了能耗分析。通过改变产氢摩尔分数,得到相应的单位产氢量费用,进一步拟合出了新氢生产成本随产氢摩尔分数变化的定量关系式。在此基础上,对某炼厂的氢网络案例进行优化,作出不同氢源线下的节氢费用-新氢摩尔分数关系图、新氢消耗费用-新氢摩尔分数图。通过分析夹点位置随新氢摩尔分数改变的变化趋势可知,在满足氢网络要求下,节省费用随新氢摩尔分数的增大而增大,新氢消耗费用随摩尔分数的增大而减少。因此,在该氢网络中,高纯度的新氢有利于系统节能。
[Abstract]:Based on the pinch point method, the hydrogen network integration considering the purity of new hydrogen was studied. The simulation model of hydrogen production process was established by Aspen Plus. Considering raw gas, deoxygenation water, cooling water, by-product vapor, pressure swing adsorption, Under the premise of main energy consumption such as electricity consumption of compressor, the total cost of the system is calculated, and the energy consumption of the whole process is analyzed. By changing the mole fraction of hydrogen production, the corresponding unit hydrogen production cost is obtained. The quantitative relationship between the production cost of new hydrogen and the molar fraction of hydrogen production is further fitted. On the basis of this, the hydrogen network case of a refinery is optimized, and the relationship diagram of hydrogen saving cost and new hydrogen mole fraction under different hydrogen source lines is obtained. By analyzing the change trend of the pinch position with the new hydrogen molar fraction, we can see that the saving cost increases with the increase of the new hydrogen mole fraction under the requirement of the hydrogen network. The cost of new hydrogen consumption decreases with the increase of molar fraction. Therefore, in this hydrogen network, high purity of new hydrogen is beneficial to the energy saving of the system.
【作者单位】：西安交通大学化学工程与技术学院;
【基金】：国家自然科学基金重点项目(21476180)
【分类号】：TQ116.2

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