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

• 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; Flue Gas Desulfurization; Semi-Dry Flue Gas Desulfurization; Fine Particles; Fluidization; Powder Particle Fluidized Bed; Drying; Calcium Hydroxide; Slurry; 噴流層

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.

为了开发一种新型的半干烟气脱硫过程，将粉末颗粒喷口床（PPSB）应用于低温脱硫过程。在120-200的恒温温度下，将400-1000mum平均直径的粗颗粒与涉及500-1500ppm So_2的气体流动，例如So_2吸附剂（如蓝绿色的石灰）的浆液不断喂入床上。 SO_2气体与反应器中的SO_2吸附剂反应，并研究了SO_2吸附剂的种类和大小的影响，满足温度的方法，CA/S比反应温度和气体速度对SO_2的去除的方法。SO_2去除so_2。通过so_2 sorbent，ca/s softio的温度，so_2 so_2 so_2的较大和较大的温度，均为满意度的温度，该温度的温度，该温度的温度，该温度的温度，该温度的温度，该温度的温度，该温度的温度。温度很小，反应堆中的水经济速率变得缓慢且非常快速的反应在水中溶解的SO_2吸附剂和SO_2气体在这种反应的主要部分中扮演的主要部分。当使用SO_2吸附剂时，将SO_2超过95％的SO_2去除量（在CA/S比1.2大于1.2且接近饱和温度小于13k的情况下，都会获得SO_2的95％以上。