30th燃煤蒸汽锅炉烟气除尘脱硫系统设计毕业设计

摘要

两种主要污染物对自然我国大气环境污染以煤烟型为主，其中颗粒污染物及SO

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生态环境和人类都造成了很大的危害，由此形成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。因此，探索开发燃煤锅炉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

危害具有十分重要的意义。

制燃煤烟气污染对改善我国大气质量、减少酸雨和SO

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本设计首先探讨研究了当今国内外主要的烟气除尘脱硫技术，通过对比各种除尘脱硫技术的优缺点，针对30t/h燃煤蒸汽锅炉的烟气排放量、烟尘含量及硫含量，依据国家要求和技术现状选择了适合本设计30t/h燃煤蒸汽锅炉烟气的除尘脱硫方案，拟选用两级除尘系统，一级为旋风除尘，二级为电除尘，同时采用氧化镁脱硫工艺。

其次，本设计将对旋风除尘器、电除尘器、脱硫塔、烟囱尺寸、管道等主要设备进行尺寸计算和设备选型，旋风除尘器拟选用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Y315M

-4型两台。最后

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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

and particulate pollutants China's air pollution is mainly fuliginous. SO

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are two major pollutants causing great harm to the natural environment and humans. Particle pollution and acid rain pollution formed have affected China's 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 harm in our country.

and SO

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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 electrostatic precipitator, G4-73-12D type draft fan, and two Y315M2-4 type motors. At last, main equipments and process flow diagram are drawn based on all above.

Key words:coal fired flue gas, cyclone, electrostatic precipitator, magnesium desulfurization, pipeline calculation