基于AHP-TOPSIS的太仓电厂脱硫改造方案评价研究

发布时间：2018-06-26 20:12

本文选题：太仓电厂 + 脱硫改造　；参考：《华北电力大学》2017年硕士论文

【摘要】：作为主要的空气污染物,SO_2是导致酸雨现象出现的重要原因。燃煤发电厂是我国SO_2的主要来源,其排放量大约占二氧化硫排放总量的二分之一。为此,开展电厂脱硫技术改造工作是推动电能清洁生产的一项重要措施。然而,脱硫改造项目往往较为复杂,其实施受技术、经济、环境等较多因素的限制,如何为电厂选择合适的脱硫改造方案是一个复杂的决策问题。因此,以电厂实际运行状况为基础,全面系统地对影响项目建设的因素进行分析,评估和优选出兼具技术性与经济性且可以发挥良好环境效益与社会效益的脱硫技术改造方案,是电厂减少SO_2排放量、实现清洁生产的首要任务。本文在学习国内外相关文献的基础上,深入了解技术改造与综合评价的相关理论,为后文开展太仓电厂脱硫改造方案评价工作奠定坚实的理论基础。本文对太仓电厂7号机组脱硫系统运行现状予以总结,指出脱硫增容提效改造的必要性。在阐述脱硫改造项目的设计原则及建设条件的基础上,制定出四种吸收塔改造方案以供选择,并设计出配套的脱硫公用部分设备系统改造方案。本文从技术性、环保性、经济系以及社会性四个角度构建脱硫改造方案评价指标体系,将层次分析法与TOPSIS法结合使用建立脱硫改造方案评价模型,其中,利用层次分析法对各指标赋权,采用TOPSIS法获得各方案的比选结果,实现对各方案的科学选择。实证结果表明,太仓7号机组脱硫改造采用旧塔改造方式较为适宜,并且预期可以获得良好的环境效益、经济效益与社会效益,综合效益明显。本文所构建的脱硫改造方案综合评价指标体系和模型兼具科学性与可行性。本文的研究成果为今后我国电厂开展脱硫改造方案评价比选工作做出了有益探索,有助于推动我国电厂环保改造工作的进程。
[Abstract]:As a major air pollutant, so _ 2 is an important cause of acid rain. Coal-fired power plants are the main source of SOS _ 2 in China, accounting for about 1/2 of the total sulfur dioxide emissions. Therefore, it is an important measure to promote the clean production of electric energy to carry out the retrofit of desulfurization technology in power plant. However, desulphurization and retrofit projects are often more complicated, and their implementation is limited by many factors, such as technology, economy, environment and so on. How to select suitable desulfurization and retrofit schemes for power plants is a complex decision problem. Therefore, based on the actual operation of the power plant, the factors affecting the project construction are analyzed comprehensively and systematically, and the technical and economical desulphurization technical retrofit scheme is evaluated and selected, which can bring into play the good environmental and social benefits. It is the primary task of reducing so 2 emission and realizing clean production in power plant. On the basis of studying the relevant literature at home and abroad, this paper deeply understand the relevant theories of technical transformation and comprehensive evaluation, and lay a solid theoretical foundation for the evaluation of desulphurization and retrofit scheme of Taicang Power Plant later. This paper summarizes the operation status of desulphurization system of Unit 7 in Taicang Power Plant, and points out the necessity of retrofitting desulphurization, capacity and efficiency. On the basis of expounding the design principle and construction conditions of desulphurization and retrofit project, four kinds of retrofit schemes of absorber were worked out for selection, and the corresponding retrofit scheme of desulfurization common part equipment system was designed. In this paper, the evaluation index system of desulphurization and retrofit scheme is constructed from the aspects of technology, environmental protection, economic department and sociality, and the evaluation model of desulphurization scheme is established by combining AHP with TOPSIS. The method of TOPSIS is used to obtain the comparison results of each scheme, and the scientific choice of each scheme is realized. The results show that the old tower is suitable for desulphurization and retrofitting of Taicang No. 7 unit, and it is expected to obtain good environmental benefit, economic benefit and social benefit, as well as comprehensive benefit. The comprehensive evaluation index system and model constructed in this paper are both scientific and feasible. The research results of this paper have made a beneficial exploration for the evaluation and selection of desulphurization and retrofit schemes in power plants in China in the future, and are helpful to promote the process of environmental protection transformation of power plants in China.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：F224;F426.61

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