【作者】 周齐宏；

【导师】 胡山鹰；

【作者基本信息】 清华大学 ， 化学工程与技术， 2005， 硕士

【摘要】 任何单独的能源与资源利用技术,都无法满足我国未来几十年内对能源供应高效率、低污染和低成本的要求。以合成气为核心,生产多种化工产品和电力的联供-联产系统有着光明的发展前景,所构筑的整体化能源、资源利用系统可以产生巨大的集成效益和规模效益。先进的煤气化技术、天然气气化技术、液相法甲醇、二甲醚合成技术和燃气-蒸气发电技术等是联供-联产系统内过程耦合的关键。本文利用Aspen-Plus软件,建立了各个过程的模型,并利用这些模型的组合,对单产系统、联产系统合联供-联产系统进行了流程设计、模拟和计算。通过能量分析的方法,比较了各个系统的热效率和火用效率,发现单产系统的组合和联产系统之间孰优孰劣不能一概而论,并且甲醇的单产系统和二甲醚、电力的联产系统是能量利用较优的系统;通过研究各个子系统的火用及火用损,发现由化学火用转变为物理火用的过程是决定系统能量效率的关键。通过经济和环境的评价分析,探讨了我国发展联供-联产系统的可能性;投资和原料的价格是决定联供-联产系统可行性的关键。在以泸州为背景的分析中,得到了甲醇单产、二甲醚与电力联产是符合当地实际情况的优选实施方案的结论;通过环境分析,证明了由于联产系统、联供-联产系统内部的耦合作用,使得温室气体减排效果有显著提高。更多还原

【Abstract】 In the near decades, none of the utilization technology using standalone energy orresource will be able to meet the requirements of high efficiency, low pollution andlow cost for energy supply in China, therefore, the co-feed and co-production (Co-Co)system has a promising future. This system is based on the gasification;it canproduce several kinds of chemical outputs and generate electricity concurrently. Inaddition, it may bring both an enormous scale of benefits and integration benefits.The advanced technologies of coal & NG gasification, the synthesis of MeOH& DME in the liquid phase and IGCC are the key to the integration involvedin the Co-Co system. Several processing models have been built with the aidof the software Aspen-Plus. Through the designs, simulations and calculationsof the standalone system, Co-production system and Co-Co system, a numberof data concerning the systems are obtained.Via the process of energy analysis, the thermal efficiency and the exergyefficiency of each system have been compared. It is dogmatic to consider theco-production system better than the standalone production system regardingthe chemical outputs and electricity. In this research, the co-production ofDME and the standalone system of MeOH are proved better. In addition,through the research of the exergy losses in each sub-system, the transitionfrom chemical exergy to physical exergy is found as the key to determine thethermodynamic performance of the whole system.Through the evaluation and analysis of the economical and environmentalperformance of the systems, possibilities of developing the Co-Co system arediscussed. Moreover, the investment costs and prices of raw materials arefound crucial for the realization of the Co-Co system. It is testified that thestandalone system of MeOH and Co-production of DME are prior schemes inLuzhou, a city in Sichuan Province, PRC. Due to the integration effect, theemission of CO2 is cut short more in the co-production system and the Co-Cosystem than that in the standalone system.更多还原