石油炼化企业烟气臭氧氧化脱硝工艺方案研究

发布时间：2018-11-10 12:31

【摘要】：在国内外炼油厂中,主要的空气污染源来自于流化催化裂化装置在生产过程中释放的SO_x、NO_x和颗粒物。随着国家对大气环境质量要求的日益严格,炼油厂在烟气污染物控制方面面临巨大挑战。如何处理烟气中的污染物是亟待解决的环境问题之一。本文将通过中国石化上海石油化工股份有限公司炼油厂烟气净化洗涤的工艺方案研究,主要分析了目前烟气脱销的主要处理手段及其优缺点,以及臭氧脱销工艺的可行性和优势。实验结果表明:在臭氧氧化装置连续运行条件下,烟气出口NO_x排放浓度稳定在5.2-6.5 mg/m3之间,去除率大于85%。此外,对SO2和粉尘也有较高的处理效率。这些结果表明,臭氧能够有效去除烟气中SO_2、NO_X和粉尘等污染物,能满足烟气排放标准《石油炼制工业污染物排放标准》(GB31570-2015)。在实际工程应用过程中,应考虑反应温度、反应时间、O_3/NO_X摩尔比等环境因素对臭氧处理效果的影响。
[Abstract]:In refineries at home and abroad, the main air pollution sources are SO_x,NO_x and particulate matter released from fluidized catalytic cracking units. With the increasingly stringent requirements of atmospheric environmental quality, refineries are facing enormous challenges in flue gas pollutant control. How to deal with pollutants in flue gas is one of the urgent environmental problems. In this paper, through the study of the process scheme of flue gas purification and washing in the refinery of Sinopec Shanghai Petrochemical Co., Ltd., the main treatment methods and their advantages and disadvantages of off-sale flue gas are analyzed. And the feasibility and advantage of ozone stripping process. The experimental results show that under the condition of continuous operation of the ozonation unit, the NO_x emission concentration at the outlet of the flue gas is stable in the range of 5.2-6.5 mg/m3, and the removal rate is more than 85%. In addition, SO2 and dust also have a higher treatment efficiency. These results show that ozone can effectively remove pollutants such as SO_2,NO_X and dust from flue gas and meet the emission standard of petroleum refining industry (GB31570-2015). The effects of reaction temperature, reaction time and O_3/NO_X molar ratio on the ozone treatment efficiency should be considered in practical engineering application.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X742

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