基于Aspen Plus的煤基电、乙炔多联产系统模拟优化  

Process simulation and optimization for polygeneration system of coal-based acetylene and electricity by using Aspen Plus

作　　者：赵小楠[1] 杨巨生[1] 

机构地区：[1]太原理工大学电气与动力工程学院,山西太原030024

出　　处：《热力发电》2016年第5期68-73,83,共7页Thermal Power Generation

摘　　要：等离子体热解煤制乙炔工艺能耗高、煤转化率低,单一的乙炔生产成本较高,制约其工业化进程,为此,本文提出了煤热解制乙炔与亚临界燃煤电厂多联产系统策略。首先利用Aspen Plus软件分别建立等离子反应器模型、乙炔分离提纯系统模型和亚临界320 MW机组热力系统模型,然后将3个子模型耦合成多联产系统模型,并对子模型和联产模型进行优化分析,通过能量和物料的梯级利用,实现资源的合理配置和两系统的互补节能。计算结果表明:氢气气氛最有利于提高乙炔产率,煤粉中水分应小于5%,吸收塔的最佳塔板数为24;经优化后,联产系统汽轮机发电功率增加60.16 MW,等离子体装置能耗减少4.62 MW,提高了等离子体热解煤制乙炔工艺的经济性。The technology of producing acetylene by coal pyrolysis in hydrogen plasma reactor has disadvantages of high power consumption and low coal conversion.Single product makes the costs high and restricts the technology＇s industrialization.To solve this problem,this paper proposed the polygeneration system of acetylene production（by coal pyrolysis）and electricity generation（subcritical coal-fired power plant）.Firstly,the thermal plasma reactor model,acetylene separation and purification system model,and coalfired power plant system model were established by Aspen Plus software,respectively.Then,the above three sub-systems were coupled to the polygeneration system model,and the sub-system model and polygeneration system model were optimized.By cascade utilization of energy and material,rational allocation of resources and energy saving of two complementary systems can be achieved.The simulation results indicate that,the hydrogen atmosphere was helpful to the acetylene production,the moisture content in the coal should not be greater than 5%,the optimal number of stages in the absorber was 24.After optimization,the power generation of the polygeneration system increased by 60.16 MW,and the energy consumption of the plasma device reduced by 4.62 MW.The polygeneration system is helpful to improve the economical performance and promote the industrialization of the thermal plasma technology.

关 键 词：等离子装置 燃煤电厂 煤热解 乙炔 多联产系统 节能减排 ASPEN Plus 

分 类 号：TQ039.31[化学工程]