基于Aspen Plus的气流床煤气化炉建模及其变工况特性研究  

Research on Modeling and Variable Operating Condition Characteristics of Entrained Flow Coal Gasifier Based on Aspen Plus

作　　者：王轶男 吕佳阳 陈衡 张国强 徐钢 翟融融 WANG Yinan;LÜJiayang;CHEN Heng;ZHANG Guoqiang;XU Gang;ZHAI Rongrong(Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation(North China Electric Power University),Changping District,Beijing 102206,China)

机构地区：[1]热电生产过程污染物监测与控制北京市重点实验室(华北电力大学),北京市昌平区102206

出　　处：《发电技术》2024年第5期951-958,共8页Power Generation Technology

基　　金：国家科技重大专项(J2019-I-0009-0009)。

摘　　要：【目的】研究整体煤气化联合循环(integrated gasification combined cycle,IGCC)电站中煤气化炉的运行机理,分析和优化煤气化炉的关键运行参数。【方法】基于Aspen Plus建立了气流床煤气化炉的稳态热力学模型,并与文献中数据进行比对,验证了模型准确性,在此基础上,开展了对煤气化炉关键参数敏感性的研究。【结果】热力学模型适合对稳态的煤气化过程进行模拟,具有模拟结果准确、建模简单和计算量不大的优点。【结论】敏感性分析的结果表明:氧煤比是影响煤气化过程的最主要的运行参数,氧气不足和氧气过多都会造成合成气有效成分的产量减少,建立的Shell气化炉模型的最佳氧煤比在0.85左右;水煤比也是影响煤气化过程的关键参数,气化炉内能量充足时,增加输入水的量可使合成气中含有更多的氢气,而能量不足时过多的水也会导致合成气有效成分的减少。[Objectives]This research aims to investigate the operational mechanism of a coal gasifier within an integrated gasification combined cycle(IGCC)power plant,with a focus on analyzing and optimizing key operational parameters.[Methods]A steady-state thermodynamic model of the gasifier was developed using Aspen Plus.The model’s accuracy was validated by comparing its simulation results with published data.A sensitivity analysis was then conducted to assess the impact of key gasifier parameters.[Results]The thermodynamic model demonstrates the suitability for simulating steady-state coal gasification processes.The model exhibits high accuracy,simplified structure,and efficient computational performance.[Conclusions]The sensitivity analysis reveals that the oxygen-to-coal ratio holds the most significant influence on the coal gasification process.Both insufficient and excessive oxygen levels result in a reduction of syngas active ingredient production.The optimal oxygen-to-coal ratio for the Shell gasifier model is determined to be approximately 0.85.Water-to-coal ratio also plays a critical role in the gasification process.When sufficient energy is present within the gasifier,increasing the water input leads to higher water content in the syngas,potentially increasing hydrogen concentration.However,excessive water input under energy-constrained conditions can decrease the effective composition of the syngas.

关 键 词：燃煤发电 整体煤气化联合循环(IGCC) 煤气化 Aspen Plus 热力学模型 气流床煤气化炉 

分 类 号：TK01[动力工程及工程热物理] TQ54[化学工程—煤化学工程]