VCM装置的热能夹点分析与优化

【作者】 许刚；

【导师】 阳永荣； 俞欢军；

【作者基本信息】 浙江大学 ， 化学工程， 2005， 硕士

【摘要】 随着我国经济高速发展,能源消费急剧增加,而可利用的能源资源有限,因此,对于能耗密集型的化学工业,尤其是高耗能企业都在积极寻求更加有效的开发、利用能源的方法。 上海氯碱化工股份有限公司是国家特大型化工企业,全年消耗水、电、汽、燃料油达70万吨标煤,能源、原材料成本占总成本的85%,是国家重点耗能企业。这一特点使氯碱企业中的节能工作有着极重要的意义。有鉴于此,笔者就上海氯碱公司VCM装置的换热网络综合问题应用英国学者Linnhoff博士开发的夹点技术对VCM装置的生产过程进行全局夹点分析,并进一步地集成与优化用热网络、合理利用能量资源和对相关单元的工艺流程优化。 本文的主要内容包括: 1.综述了系统用能分析的核心技术——“夹点分析”方法的发展状况,包括研究内容、研究方法等。说明了采用全局夹点分析方法在对已有大型装置的全局过程能量集成具有重要意义。 2.介绍了上海氯碱公司VCM装置的规模、工艺流程。包括直接氯化单元、氧氯化单元、精制单元和EDC裂解单元等。其中重点介绍了国内外EDC裂解单元技术概况。 3.对VCM装置的用能现状和换热网络进行了阐述,并详细列出换热网络数据。使用英国UMIST正式授权的计算软件对系统能量目标进行了计算,得到了系统组合曲线图和总组合曲线图及平衡组合曲线图。从而分析出系统用能不合理处,并提出各优化改造方案。 4.本文进一步对EDC裂解单元的优化改造方案进行工程可行性分析和投资费用估算,并确定了最终的节能改造方案,该案已于2005年由上海氯碱公司正式采纳并实施。结果显示:该方案实施后,仅一套EDC裂解单元每年可以节省能源155万元。 5.本文首次对氯碱行业中的氯乙烯(VCM)装置利用夹点技术对于集成与优化用热网络、合理利用能量资源和对工艺流程优化等方面的进行了一次深入地研究和开发,对用热进行全面和系统剖析从而进一步指导生产和管理。更多还原

【Abstract】 As Chinese economy developed rapidly and the consumption of energy increased sharply, it’s too apparent that available energy source is very limited. The enterprises with high consumption of energy in chemical industry of concentrated energy research actively for more effective methods to develop and make use of energy.Shanghai Chlorine-Alkali Company (SACA) is one of national oversize chemical enterprises which spent 700,000 tons per standard coal in consumption of water, electricity, steam and fuel oil. The cost of energy and raw materials takes up 85 percent of general cost chlorine-Alkali enterprises. To integrate and optimize heat exchanger networks and unit’s process of SCAC’s VCM plant, the thesis analyses and diagnoses their heat exchanger networks with the pinch point technology of UK Dr. Linnhoff. This paper consists of five parts of contents as follows:1. The art-of-state of pinch point technology was completely reviewed covering through the research principal to scheme. It clarified that adoption of technology in an original huge plant is very important to guide system energy integration.2. VCM plant contains some primary units: direction Chlorination unit, oxygen chlorination unit, EDC & VCM purification, and EDC cracking unit. The introduction of five units included process and scale, especially reviewed EDC cracking unit.3. The paper stated that the current status of energy and heat exchanger networks of VCM plant with detail datasheet. The system composite curve, general composite curve and balanced composite curve were gained by using authorized formally software UMIST to calculate the target of system energy. Consequently, the illogical were discovered from these curves and its optimization plans have been offered.4. The optimization plan for EDC cracking unit were analysed in engineering feasibility and evaluated the investment, eventually confirmed the finial plan. This plan have been adopted formally by SCAC.It is the first time to deeply research and develop the integration and optimization of heat exchanger networks in VCM plant of SCAC, and to systematically and comparatively analyse, so as to further instruct production and management.更多还原