权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Process Development of Effective Semi-Dry Flue Gas Desulfurization by New Type of Fluidized Bed (Powder Particle Spouted Bed)

新型流化床（粉粒喷动床）高效半干法烟气脱硫工艺开发

基本信息

批准号：
08555185
负责人：
KATO Kunio
金额：
$ 3.46万
依托单位：
GUNMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555185/
关键词：
Flue Gas Desulfurization Semi-Dry Flue Gas Desulfurization Fine Particles Fluidization Powder Particle Fluidized Bed Drying Calcium Hydroxide Slurry 噴流層

项目摘要

To develop a new type of semi-dry flue gas desulfurization process, powder particle spouted bed (PPSB) was applied to low temperature desulfurization process. The coarse particles of average diameter of 400-1000mum were fluidized with gas involing 500-1500ppm SO_2 at the constant temperature of 120-200ﾟCThe slurry of SO_2 sorbent like slaked lime are continuously fed to the bed. SO_2 gas reacted with SO_2 sorbent in the reactor and the reacted sorbent was entrained from the reactor and collected by the bag filter.The effects of kind and size of SO_2 sorbent, approach to saturation temperature, Ca/S ratio reaction temperature and gas velocity on SO_2 removal were investigated.SO_2 removal was strongly affected by kind and size of SO_2 sorbent, Ca/S ratio, approach to saturation temperature, that is, the temperature of reactor- wet bulb temperature.If the approach to saturation temperature is small, the evaporation rate of water in the reactor becomes slow and very fast reaction between dissolved SO_2 sorbent in water and SO_2 gas plays main part of this reaction.When the slaked lime was used as SO_2 sorbent, more than 95% of SO_2 removal was obtained in the case where Ca/S ratio is larger than 1.2 and the approach to saturation temperature is smaller than 13K.

为开发新型半干法烟气脱硫工艺，将粉末颗粒喷动床（PPSB）应用于低温脱硫工艺。将平均直径为400-1000μm的粗颗粒在120-200℃恒温下用掺有500-1500ppm SO_2的气体进行流化，将消石灰等SO_2吸附剂浆液连续送入床层。 SO_2气体在反应器中与SO_2吸附剂发生反应，反应后的吸附剂被带出反应器并由布袋除尘器收集。考察了SO_2吸附剂的种类和尺寸、接近饱和温度、Ca/S比反应温度和气体流速对SO_2去除的影响。SO_2脱除率受SO_2吸附剂种类和尺寸、Ca/S比、接近饱和温度的强烈影响，即反应器的温度-湿球温度。如果接近饱和温度小，反应器中水的蒸发速率变慢，而水中溶解的SO_2吸附剂与SO_2气体之间的快速反应是该反应的主要部分。当使用熟石灰作为SO_2吸附剂时，在Ca/S比大于1.2且接近饱和温度为的情况下，获得了95%以上的SO_2去除率小于13K。