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摘要：烟气循环流化床脱硫是近几年新兴起的具有开发前景的烟气治理技术，它是一种新的适用于锅炉和其它燃烧设备的干法烟气脱硫工艺。该工艺以循环流化床原理为基础，经过吸收剂多次循环，吸收剂与烟气接触时间增加，因此大大提高了吸收剂的利用效率。这种工艺不但具有干法工艺的许多优点，如流程简单、占地少、投资低，而且可以在较低钙硫比下达到较高的脱硫效率。
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本设计的主要内容是对300MW机组循环硫化床烟气脱硫进行工艺设计，通过分析给出的锅炉、燃煤及烟气等原始资料，对主要工艺设备旋风除尘器、循环流化床脱硫塔、气固分离器、电除尘器等装置进行设计计算，完成引风机、水泵等主要设备的选型。通过设计计算，使污染气体、烟尘可以达标排放，同时尽量保证运行安全性以及较低成本，达到较好的社会效益和环境效益。26220
毕业论文关键词：循环硫化床脱硫；脱硫效率；设计计算；旋风除尘器；电除尘器
Design on circulating fluidized bed-flue gas desulfurization for a 300MW unit
Abstract：Flue gas circulating fluidized bed desulfurization is a new flue gas treatment technology with development prospect in recent years. It is a new dry flue gas desulfurization process suitable for boiler and other combustion equipment. The process is based on the principle of circulating fluidized bed, through the absorbent circulating several times, the contact time between absorbent and flue gas increases, thus greatly improving the efficiency of the use of absorbent. This process not only has many advantages of dry process, such as simple process, less land, and low investment, but also it can achieve higher desulfurization efficiency in the lower calcium-sulfur ratio.
The main contents of this design are the process design of 300MW unit circulating sulfurized bed flue gas desulfurization. By analyzing the raw materials such as boiler, coal and flue gas, the main process equipment containing cyclone dust collector, circulating fluidized bed desulfurization tower, gas-solid separator, electrostatic precipitator and other devices are calculated and designed, and the fan, pumps and other major equipment are selected in this design. Through the design and calculation, the pollution of flue gas and soot can be emitted to reach standards, and the design tries to ensure the safety of operation and lower costs in order to achieve better social and environmental benefits.
Key words: Circulating fluidized bed-flue gas desulfurization；Desulfurization efficiency；Design and calculation；Cyclone；Electrostatic precipitator
目 录
摘要1
关键词1
Abstract1
Key words1
1概述1
1.1 二氧化硫污染现状 1
1.2 二氧化硫减排的主要工程技术2
1.3 常用的烟气脱硫技术2
1.3.1 湿法烟气脱硫技术3
1.3.2 半干法烟气脱硫技术3
1.3.3 干法烟气脱硫技术3
1.4 烟气脱硫工艺方案的选择4
1.5 循环硫化床烟气脱硫工艺的应用前景4
2 设计方案 4
2.1 设计目的 4
2.2 设计参数5
2.3 设计方案6
2.3.1 主要设备的工作原理6
2.3.2 工艺总流程7
3 设计计算 7
3.1 设计相关参数7
3.2 旋风除尘器8
3.2.1 旋风除尘器的设计说明8
3.2.2 旋风除尘器的基本尺寸计算8
3.2.3 旋风除尘器的除尘效率计算9
3.2.4 压力损失9
3.3 循环硫化床脱硫塔10
3.3.1 循环硫化床脱硫塔的设计说明10
3.3.2 空塔气速的计算10
3.3.3 循环硫化床脱硫塔直径的计算11
3.3.4 循环硫化床高度的计算11
3.3.5 文丘里管的设计计算11
3.3.6 Ca(OH)2循环率的计算11
3.3.7 物料平衡计算11
3.3.8 石灰仓的设计计算12
3.3.9 螺旋进料器的选型12
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