毕业论文___30th燃煤蒸汽锅炉烟气除尘脱硫系统设计.doc

摘 要 我国大气环境污染以煤烟型为主，其中颗粒污染物及SO2两种主要污染物对自然生态环境和人类都造成了很大的危害，由此的颗粒物污染和酸雨污染已成为制约我国经济和社会可持续发展的一个重要因素。探索开发燃煤烟气的除尘脱硫工艺，使烟气中污染物的浓度达到国家烟气排放标准，减少污染物的排放，有效控制燃煤烟气污染对改善我国大气质量、减少酸雨和SO2危害具有十分重要的意义。CLP/B-27.5-X型，静电除尘器拟选用CDPK—45/3型，引风机拟选用G4-73-12D型，电动机拟选用Y315M2-4型两台。最后根据设计设备参数绘制设备外形尺寸图和总体工艺流程图。 关键词：燃煤烟气，旋风除尘，静电除尘，氧化镁脱硫，管道计算  Design of Flue Gas Dusting and Desulfurization System of 30t/h Coal Fired Steam Boiler ABSTRACT Chinas air pollution is mainly fuliginous. SO2 and particulate pollutants are two major pollutants causing great harm to the natural environment and humans. Particle pollution and acid rain pollution formed have affected Chinas economic and social sustainability. Therefore, coal-fired boiler flue gas dust removal and desulfurization process is developed to make the concentration of pollutants in flue gas reach the national standard and then reduce pollutants emission. Controlling the coal-smoke pollution effectively is of great significance to improve air quality, i.e., to reduce acid rain and SO2 harm in our country. Firstly, this paper introduces the main domestic and foreign flue gas desulphurization and dust removal technology. Select a boiler flue gas desulfurization and dust removal system which is suitable for 30t/h coal fired steam boiler by comparing the advantages and disadvantages of various desulphurization and dust removal technologies. The dusting and desulfurization system can make the flue gas emissions, dust content, sulfur content in the flue gas comply with national requirements and technical status. This work selects two dust collectors with the cyclone as the first one and the electrostatic precipitator as the second one integrated with magnesium oxide desulfurization process. Secondly, this design will calculate the size and select the device type of the main devices of the system, such as cyclone, electrostatic precipitator, desulfurization tower, chimney and pipeline. This paper chooses CLP/B-27.5-X type cyclone, 45/3-CDPK type el