基于仿真模拟的合成氨系统动态特性分析研究  

Research on dynamic characteristics of synthetic ammonia system based on simulation

作　　者：于双恩 陈斌 郝沛 王翠萍 张朝环 YU Shuang-en;CHEN Bin;HAO Pei;WANG Cui-ping;ZHANG Zhao-huan(National Institute of Clean-and-Low-Carbon Energy,CHN Energy,Beijing 102211,China;Shandong Guohua Shidai Investment Development Co.,Ltd.,Jinan 250002,China)

机构地区：[1]北京低碳清洁能源研究院,北京102211 [2]山东国华时代投资发展有限公司,山东济南250002

出　　处：《现代化工》2024年第S01期338-344,共7页Modern Chemical Industry

摘　　要：新能源发电消纳需求日益增长,电解水制绿氢进而制备合成氨逐渐成为一种消纳新能源电力的主要方式。但新能源形式具有随机性及波动性,与传统合成氨要求“安稳长满优”特性存在巨大差异,接入新能源易引起合成氨系统负荷不规律波动。基于Aspen软件搭建了合成氨仿真模型,分析了系统温度、压力对出塔气温度、出塔气氨含量、循环比、系统能耗等参数的影响,以及动态变负荷调节过程中氢氮比、温度、压力、空速、主要能耗、循环比、塔出口氨含量的响应特性。结果表明,系统能耗与系统压力即氨转化率紧密相关;新鲜气氢氮比保持定值时,入塔气氢氮比会缓慢变化;负荷波动时,温度及流量控制易出现紊乱。针对低负荷不易控制情况提出改进建议。The demand for new energy generation and consumption is increasing day by day.Electrolysis of water to produce green hydrogen and further to synthesize ammonia has gradually become the main way to consume new energy electricity.However,new energy electricity features with randomness and volatility,which is significantly different from the requirement of traditional ammonia synthesis that requires“safety,stable,long period,full load,and excellent benefit”characteristics.Connecting to new energy power can easily cause irregular fluctuation in the load of ammonia synthesis system.A simulation model for ammonia synthesis is established based on Aspen software.The influence of system temperature and pressure on the temperature of outlet gas,ammonia content in outlet gas,circulation ratio,system energy consumption and other parameters are analyzed.The response characteristics of hydrogen/nitrogen ratio,temperature,pressure,velocity,main energy consumption,circulation ratio,and ammonia content at the outlet of tower during dynamic load regulation are analyzed.Results indicate that system energy consumption is closely related to system pressure,i.e.ammonia conversion rate;The hydrogen to nitrogen ratio of the incoming gas will change slowly when the hydrogen to nitrogen ratio of fresh gas remains constant;Temperature and flow control are prone to disturbances when the load fluctuates.Some improvement suggestions are suggested for the situations where low loads are difficult to control.

关 键 词：绿氨 Aspen软件 不规律波动 低负荷控制 氢氮比 仿真模拟 

分 类 号：TQ113.26[化学工程—无机化工]