基于压缩机选型的炼厂氢网络集成  

Synthesis of refinery hydrogen networks considering compressor types

作　　者：周迎千 冯霄[1] 杨敏博 ZHOU Yingqian;FENG Xiao;YANG Minbo(School of Chemical Engineering&Technology,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学化学工程与技术学院,西安710049

出　　处：《清华大学学报（自然科学版）》2023年第5期723-729,共7页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金项目(22278327)。

摘　　要：随着原油劣质化趋势加重,炼厂的氢气(H_(2))需求日益增加,通过氢网络集成提高氢气的利用效率变得至关重要。压缩机费用是炼厂氢网络中除新氢外的第二大费用,往复式压缩机和离心式压缩机被广泛用于氢气输送网络。该文提出了一种考虑多级离心式压缩机和多级往复式压缩机选型的超结构,约束条件包括压缩机的流量和出口压力;基于此超结构建立了一个混合整数非线性规划模型,以最小总年化成本为目标函数,其中综合考虑了新氢的成本、压缩机的投资费用和操作费用;并通过案例分析证明了模型的实用性。[Objective]Hydrogen demands in refineries are increasing annually because of the growing processing of heavy crude oil,which necessitates optimizing the hydrogen network to improve hydrogen usage.The cost associated with hydrogen compressors is the second largest in a refinery hydrogen network,following the fresh hydrogen cost.Thus,the synthesis of hydrogen networks considering gas compression has been an active topic in process systems engineering.Previous work has been modeled on reciprocating compressors,focusing on reducing the number of compressors and/or compression power consumption.However,reciprocating and centrifugal compressors are widely used in refinery hydrogen networks.The advantage of centrifugal compressors is their suitability for large gas flow rates without too high exhaust pressures,while reciprocating compressors have high and stable exhaust pressures and are suitable for small gas flow rates.[Methods]This work presents a hydrogen network superstructure that considers the selection of multistage centrifugal and reciprocating compressors.Compressor selection is determined based on the characteristics of reciprocating and centrifugal compressors considering their inlet gas flow rates and exhaust pressures.A mixed integer nonlinear programming(MINLP)model is formulated to minimize the total annualized cost,comprising fresh hydrogen,compressor investment,and compression power.The developed MINLP model is examined based on a hydrogen network reported in the literature.It is coded in the general algebraic modeling system 35.2 and can be directly solved by the BARON solver.[Results]The results indicated that the optimal hydrogen network contained three centrifugal compressors and six reciprocating compressors,with one reciprocating compressor for two-stage compression and one for three-stage compression.The flow rates of the three centrifugal compressors were larger than the upper flow rate limit of the reciprocating compressors,while the outlet pressures were lower than the upper outlet pressure l

关 键 词：化工系统工程 氢网络集成 压缩机类型 多级压缩 混合整数非线性规划模型 

分 类 号：TQ021.8[化学工程]