摘要
针对乙烯装置蒸汽系统的操作参数优化问题,从系统能效视角提出了一种基于分析的优化方法。在建立蒸汽供应和转换设备模型的基础上,依据蒸汽系统的结构建立了各级蒸汽的平衡模型和约束方程。基于Aspen Plus流程模拟软件建立了乙烯过程的流程模拟系统,建立了可计算蒸汽和动力需求的非线性黑箱模型。通过集成蒸汽平衡模型、设备模型和流程模拟黑箱模型,以蒸汽系统能效最大为优化目标,采用两步计算方法,可得到蒸汽系统内各设备的最优操作条件。乙烯装置的实例分析验证了该方法的有效性。
A method based on exergy analysis is proposed to optimize the energy efficiency of a system for the optimization of operating parameters in steam system of ethylene plant. Equilibrium model and constraint equations are established based on the structure of the steam system on the basis of the establishment of steam supply and conversion device model at all levels of steam. A process simulation system of ethylene plant and the nonlinear black box model to calculate steam and power requirements are established with Aspen Plus process simulation software. By integrating steam equilibrium models, equipment model and process simulation black-box model, optimum operating conditions is calculated using the two-step method for the largest steam system efficiency optimization target. Example of an ethylene plant analysis verifies the validity of this method.
出处
《计算机与应用化学》
CAS
2016年第8期847-851,共5页
Computers and Applied Chemistry
基金
国家重点基础研究发展计划(973)资助项目(2014AA041802)
国家自然科学基金资助项目(61273145
61273146)
关键词
分析
蒸汽系统
流程模拟
操作优化
exergy analysis
steam system
process simulation
operation optimization
