钙硫比和烟气量对灰钙循环烟气脱硫反应器脱硫效率影响的数值模拟  

Numerical Simulation of Ca/S Molar Ratio and Flue Gas Volume Influence on Desulfurization Efficiency in Active Calcium Circulating Flue Gas Desulfurization Reactor

作　　者：于清航 Yu Qinghang(CCTEG China Coal Research Institute,Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司,北京100013

出　　处：《煤化工》2020年第4期33-37,共5页Coal Chemical Industry

基　　金：北京市科技计划重大科技成果转化落地培育资助项目(Z161100004816012);天地科技股份有限公司科技创新创业资金专项项目(2019-TD-MS012)。

摘　　要：利用ICEM CFD 18.0软件,基于反应动力学实验结果,对额定蒸汽量40 t/h的煤粉锅炉配套的灰钙循环烟气脱硫反应器进行数值模拟,研究钙硫比和烟气量对脱硫效率的影响,同时把模拟结果和工业试验结果进行比较验证。结果表明:不同钙硫比下,反应器内SO2浓度均随反应器高度的增加先升高再降低;烟气脱硫效率随钙硫比的增加而升高,但当钙硫摩尔比从1.0增加到1.4时,脱硫效率无明显变化;不同烟气量条件下,从反应器底部到顶部SO2浓度均逐渐降低,烟气脱硫效率受烟气量影响较小,烟气量增大,脱硫效率略微减小。建议钙硫比和烟气量最佳取值分别为1.0和30000 m^3/h^40000 m^3/h。Using ICEM CFD 18.0 software,based on the experimental results of reaction kinetics,a mathematical simulation of the active calcium circulating flue gas desulfurization reactor used to support pulverized coal boiler with rated steam volume of 40 t/h was conducted to study the impact of Ca/S molar ratio and flue gas volume on the desulfurization efficiency,and the comparison was made between the simulation result and experimental result for verification.The result showed that in the case of different Ca/S molar ratios,the SO2 concentration in the reactor increased first and then decreased with the increase of the reactor height.The flue gas desulfurization efficiency improved with the increase of Ca/S molar ratio,but when the Ca/S molar ratio increased from 1 to 1.4,the desulfurization efficiency did not change significantly.In the condition of different flue gas volumes,the SO2 concentration gradually decreased from the bottom to the upper part of the reactor,and the flue gas desulfurization efficiency was less affected by the flue gas volume.When the flue gas volume increased,the desulfurization efficiency slightly reduced.The optimum values of Ca/S molar ratio and flue gas volume were suggested to be 1.0 and 3000 m^3/h-4000 m^3/h respectively.

关 键 词：灰钙循环 烟气脱硫 钙硫比 烟气量 数值模拟 

分 类 号：TQ536[化学工程—煤化学工程]