Petrochemical industry consists of many high energy-consuming production processes. Ethylene production plays an important role in the Petrochemical industry. Ethylene products such as ethylene, propylene, butadiene, benzene, toluene and xylene, are fundamental raw materials in the petrochemical industry. The capacity of ethylene production indicates the national development level of the petrochemical industry. However, ethylene production is a complicated system which features numerous variables and strong coupling between variables. The analysis of such a large system, the refinement of heat exchanging networks and utilities in order to reduce energy consumption proves to be a huge task to relevant researchers. Through years of exploration, heat-exchanging and control experts have proposed various methods to diagnose energy consumption of ethylene production. But there are still many unexplored fields and Energy consumption analysis of ethylene production is subject to further refinement. This paper is based on the project of ethylene process energy-consumption data fusion research and application which is a 863 endeavor conducted jointly by Institute of Automation, Chinese Academy of Sciences and Beijing University of Chemical Technology and Sinopec engineering corporation. Through in-depth study of various existing methods of energy analysis, combined with my own theoretical knowledge of energy analysis and engineering experience, this paper adopts data envelop analysis, pinch technology and top-level analysis to diagnose the energy consumption of ethylene production, does a comparison of main domestic ethylene plants. This paper consists of five chapters; each has the following main contents: 1. Chapter 1 is an introduction part, which introduces the development of ethylene production and its common energy consumption analysis methods in our country and abroad. 2. Chapter 2 introduces the main components of ethylene production and the corresponding dominating patent technologies. 3. Chapter 3 introduces and compares energy-consumption analysis methods which presently are widely used in ethylene industry and analyses the advantages and disadvantages of each method. 4. Chapter 4 analyses the energy-consumption data of main domestic Ethylene plants using DEA analysis, conducts process streams pinch analysis and utilities pinch analysis on an ethylene cryogenic system. 5. Chapter 5 sums up this paper and presents some idea and suggestion to the furth...
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