污泥再燃脱硝特性试验研究  

Experimental Study on the Denitration Characteristics of Sludge Reburning

作　　者：肖凯华 侯志鹏[1] 金晶[2] XIAO Kai-hua;HOU Zhi-peng;JIN Jing(Shanghai Marine Diesel Engine Research Institute,Shanghai,China,Post Code :200090;University of Shanghai for Science and Technology,School of Energy and Power Engineering,Shanghai,China,Post Code :200093)

机构地区：[1]中国船舶重工集团公司第七一一研究所,上海200090 [2]上海理工大学能源与动力工程学院,上海200093

出　　处：《热能动力工程》2018年第12期78-85,共8页Journal of Engineering for Thermal Energy and Power

摘　　要：为分析再燃区温度、污泥含水率、过量空气系数和停留时间对污泥再燃脱硝特性的影响,对污泥再燃脱硝特性进行试验研究。采用配气法模拟流化床锅炉燃烧产生的烟气,使用污泥颗粒作为再燃燃料,通过立式管式炉进行再燃试验。结果表明:在再燃区温度为850～950℃时,随着再燃区温度升高,NO和N_2O的还原率均升高;水分对NO和N_2O的还原机理影响不同,含水率为10%～15%时,NO_x的还原率较高;在过量空气系数为0. 7～1. 0时,随过量空气系数升高,NO和N_2O的还原率减小;在停留时间为0. 45～0. 7 s时,随停留时间增大,NO和N_2O的还原率增大。Sludge reburning and denitration characteristics are investigated in this paper.This investiga- tion mainly aims at studying the influence of factors such as reburning zone temperature,sludge moisture content,excess air coefficient and residence time on the sludge reburning denitration.Gas distribution method is adopted to simulate the flue gas from fluidized bed boiler.Sludge particles are used as reburning fuel.The reburning test is conducted in a vertical tube furnace.The experimental results show with the in- creasing of the reburning zone temperature from 850%to 950℃,the NO and N2O reduction rates are both improved.The effect of moisture on the reduction mechanism of NO and N2O is different.When the water content is between 10%and 15%,the reduction rate of NOx is higher.Within the range of excess air coefficient 0.7to 1.0,the NO and N2O reduction rates decrease with the excess air coefficient.NO and N2O reduction rates increase with the residence time from 0.45s to 0.7s.

关 键 词：污泥 再燃控制 流化床锅炉 脱硝特性 

分 类 号：X705[环境科学与工程—环境工程]