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本文重点对一个基于天然气的甲醇与动力联产系统的关键参数进行了系统性能影响性、规律性分析研究。在之前的研究工作中,根据化学能、物理梯级利用原理,提出了基于天然气部分重整的化工动力多联产系统,相比独立的分产化工与动力系统,可以节省10%左右的原料输入,相应的研究成果发表在2007年的Energy杂志上面(2007,33:206～212)。本文进一步对该系统的关键参数进行了影响性、规律分析,目的为了能够改善系统的性能,进一步提升节能潜力。根据该多联产系统的集成机理以及系统特点,得到关键操作参数为重整温度以及水碳比控制的重整率,以及合成气在化工与动力之间的分配比。借助大型模拟软件Aspen plus,获得了这些关键操作参数对系统节能特性以及输出化动比的影响。结果表明,当采用适宜的重整度为70%左右,以及循环倍率为2.1左右的时候,能够获得较高的系统节能效果(大约10%的节能效果);而且研究表明,在选取最佳重整度情况下,通过调整分配比可以获得宽范围的化动比负荷要求(1～3),可以满足不同用户的需求。
In this paper, the key parameters of a natural gas-based methanol and power co-generation system are analyzed systematically and systematically. In the previous research work, chemical kinetic polygeneration system based on partial reforming of natural gas was proposed based on chemical energy and physical cascade utilization principle, which can save about 10% raw material input compared with independent chemical and power system , The corresponding research results published in the 2007 Energy magazine (2007,33: 206 ~ 212). In this paper, the key parameters of the system are further affected, regular analysis, in order to improve system performance, to further enhance the potential of energy conservation. According to the integrated mechanism and system characteristics of the polygeneration system, the key operating parameters are the reforming temperature and the reforming ratio controlled by water / carbon ratio and the distribution ratio of the syngas between chemical industry and power. With the help of Aspen plus, a large simulation software, the impact of these key operating parameters on the system’s energy-saving characteristics and output kinematic ratio was obtained. The results show that when the appropriate degree of reformation is about 70% and the circulation rate is about 2.1, a higher system energy saving effect (about 10% energy saving effect) can be obtained; moreover, the research shows that when selecting the optimal weight Under the condition of completeness, a wide range of requirements for the mobilization ratio (1 ~ 3) can be obtained by adjusting the distribution ratio to meet the needs of different users.