石灰石浆液和石灰浆液三相流态化烟气脱硫比较研究

Comparative Study of the Three-phase Fluidized Gas Desulfurization by Use of Limestone Slurry and Lime Slurry

在处理烟气量 2 0 0 0m3 /h的热态实验装置上 ,进行了大量石灰石和石灰浆液烟气脱硫试验比较研究。试验结果表明 :当浆液pH值在 5～ 8之间 ,喷射管插入深度 16 0～2 0 0mm (相应的喷射器的压降为 15 0～ 190mmH2 O) ,喷射速度为 10～ 2 5m/s左右 ,循环倍率为 3,浆液浓度为 7%以下时 ,对反应加以搅拌和对产物强制氧化 ,使用石灰作脱硫剂可以获得 95 %以上的脱硫效率 ,使用石灰石作脱硫剂脱硫效率大于 75 % ,若在石灰石脱硫时使用添加剂也能获得90

With the help of a hot state test rig for processing flue gas with a flow rate of 2000 Nm 3/h a comparative study was performed of fluidized gas desulfurization through numerous tests by using limestone slurry and lime slurry. The results of tests show that in case of the slurry pH value between 5-8, and the insertion depth of a spray tube at 160～200 mm (the corresponding pressure drop of the spray device being 150～190 mm water) the spray speed will be around 10～25 m/s and the circulation rate, 3. With the slurry concentration at below 7% through a stirring and forced oxidation of reaction products a desulfurization efficiency of more than 95% can be attained if lime is used as a desulfurizing agent. With limestone serving as a desulfurizing agent a desulfurization efficiency of in excess of 75% may result, and this efficiency can be increased to above 90% if an additive of organic acid is also utilized in addition to the limestone desulfurizing agent.