Research on the Advanced Energy-Saving Performance of the Process for a Green Power-to-Hydrogen and Flexible Ammonia Synthesis Demonstration Project
绿电制氢—柔性合成氨示范项目工艺节能先进性研究

摘要

选取2万t/a绿电制氢-柔性合成氨示范工程作为分析案例，围绕碱性电解制氢、PSA制氮以及模块 化撬装合成氨整套工艺开展节能工程剖析。考虑小规模化工装置普遍存在的尺度效应制约，从单元工艺配置 方案、热质集成手段、变工况协同调控模式、国产化装备落地应用等角度梳理节能实现路径。工程分析结果 显示，依托多项工艺技术协同作用，该项目合成回路具备宽负荷运行能力，氨净值不低于18%，吨氨新鲜气消 耗处于国内同类示范工程较好水平，可为分布式绿氨工艺选型、能效诊断工作提供实例参考。

Abstract

 A 20,000 t/a green power-to-hydrogen and flexible ammonia synthesis demonstration project is selected as the analysis case, and an energy-saving engineering analysis is carried out around the complete process of alkaline water electrolysis hydrogen production, PSA-based nitrogen generation, and modular skid-mounted ammonia synthesis. Considering the scale effect constraints commonly found in small-scale chemical plants, this paper reviews energy-saving implementation paths from the perspectives of unit process configuration, heat and mass integration, coordinated control under variable operating conditions, and the application of domestically produced equipment. The engineering analysis results show that, relying on the coordinated effect of multiple process technologies, the synthesis loop of this project has wide-load operation capability, with a net ammonia content of no less than 18%. The fresh gas consumption per ton of ammonia is at a relatively good level among similar domestic demonstration projects, providing case reference for distributed green ammonia process selection and energy efficiency diagnosis.