黄腐酸盐-黄腐酸可再生脱硫中硫酸盐的生成规律研究  

Study on Sulfate Formation in Wet Renewable Flue Gas Desulfurization by Fulvate-fulvic Acid

作　　者：杨继涛 和志强 屈琦超[1] 刘克建[1] YANG Ji-tao;HE Zhi-qiang;QU Qi-chao;LIU Ke-jian(Chongqing Industry Polytechnic College,Chongqing 401120,China)

机构地区：[1]重庆工业职业技术学院,重庆401120

出　　处：《广州化工》2023年第8期105-108,共4页GuangZhou Chemical Industry

基　　金：重庆市自然科学基金面上项目“黄腐酸盐-黄腐酸湿法燃煤烟气可再生脱硫机理及硫酸根的生成抑制与调控研究”(项目编号:cstc2019jcyj-msxmX0806)。

摘　　要：考察了不同的亚硫酸盐初始浓度、初始pH值、氧化空气流量以及反应温度对亚硫酸盐氧化速率的影响。SO^(2-)_(3)氧化速率随亚硫酸钠初始浓度增加而增加,亚硫酸钠的反应级数约为0.6。在pH 4.5~7.5范围内,增加初始pH值,能降低SO^(2-)_(3)氧化速率,抑制硫酸盐生成,利于FA-Na/FA脱硫富液再生。降低氧化空气流量,可有效抑制SO^(2-)_(3)氧化反应正向进行。在303~333 K内,增加氧化温度能够促进SO^(2-)_(3)氧化反应生成硫酸盐,亚硫酸盐氧化反应表观活化能E a为79.305 kJ·mol^(-1)。The effects of sulfite initial concentration,initial pH value,oxidizing air flow and reaction temperature on sulfite oxidation rate were investigated.The oxidation rate of SO^(2-)_(3) increased with the increase of the initial concentration of sodium sulfite,and the reaction order of sodium sulfite was about 0.6.In the range of pH 4.5~7.5,the increasing of the initial pH value of FA-Na/FA absorption solution can reduce the sulfite oxidation rate,which would inhibit the formation of sulfate,and be conducive to the regeneration of FA-Na/FA desulfurization rich solution.The forward oxidation reaction of SO^(2-)_(3) could be effectively inhibited by reducing the oxidation air flow.In the range of 303~333 K,the increasing of the oxidation temperature could promote the oxidation of SO^(2-)_(3) to sulfate,the calculated apparent activation energy E a of the sulfite oxidation reaction was 79.305 kJ·mol^(-1).

关 键 词：黄腐酸盐-黄腐酸 亚硫酸盐 硫酸盐 氧化速率 

分 类 号：X701.3[环境科学与工程—环境工程]