The Desulfurization Performance Of Fe-Mn-based Organic Acid Desulfurization Additive And Its Experimental Study

In the limestone-gypsum wet desulfurization process step,the most important is the dissolution of limestone and the oxidation of calcium sulfite.so if you can find a compound desulfurizer that can strengthen both steps at the same time,It will effectively improve the predicament of limestone-gypsum wet desulphurization,which can meet deep desulfurization and at the same time greatly reduce the huge costs and large-scale construction period brought about by the desulfurization transformation.Studies have shown that: organic weak acid desulfurization additives can effectively promote the dissolution of limestone,and iron and manganese ions coexist under the conditions of the best effect of calcium sulfite oxidation.In this paper,firstly,the formula of desulphurization additive which most favorable for limestone dissolution in Fe-Mn-based organic acid is selected and the influence of different experimental conditions on the dissolution of limeston e with a new Fe-Mn-based organic acid was investigated,by referring to Power Industry Standard DL/T943-2005 "determination of reaction rate of Limestone Powder for Wet flue Gas Desulfurization" on the platform of Limestone Acid Titration built by the Laboratory.Secondly,Secondly,based on Beijing Boqi Electric Power Technology Co.,Ltd."determination of Chemical Analysis method of Wet flue Gas Desulfurization by sulfite iodimetry",the best organic weak acid scheme based on Fe-Mn was selected by a calcium sulfite oxidation platform.using the composition of desulphurization additive,water bath temperature,p H,Iron-manganese mass ratio and the initial concentration of calcium sulfite slurry as variable parameters,Degree of oxidation of calcium sulfite were investigated under different experimental conditions after adding the best additive to get the best experimental conditions.Finally Experiments on desulfurization performance(efficiency)of different desulfurization additives were carried out,by simulating experiment of Ca-based wet flue gas desulfurization by setting up the experimental platform of bubbling desulfurization in laboratory,to validate The best organic weak acid scheme based on Fe-Mn,the impact of various factors of different levels of desulphurization efficiency was explored.The results show that ferromanganese oxalic acid when the mass ratio of iron and manganese is 1: 1 is the best desulfurization additive of ferromanganese based organic acid;The solubility of limestone is positively correlated with temperature and stirring speed,regardless of whether the addition of ferromanganese desulfurization additive with oxalic acid is added to the reaction;When the mass ratio of iron and manganese is 2:1,this new desulfurization additive has the best effect on the oxidation of calcium sulfite,and the oxidation effect of calcium sulfite is the best when the reaction temperature is 318 kg and p H is 5.5.The experimental results of calcium based wet flue gas desulfurization show that When the mass ratio of iron and manganese is 2: 1,the additive of ferromanganese oxalic acid desulfurization is the most effective in the desulfurization process;when it joined the desulfurization experiment,the desulfurization efficiency increased to 88.7%,12 percentage points higher than the blank test.In the orthogonal experiment of calcium based wet desulfurization,the temperature in the desulfurization reaction is the main factor affecting the desulfurization efficiency;initial p H 5,tail gas collection time of 20 min,reaction temperature of 50 ?,stirring rate of 300 rpm is The optimum combination of desulphurization reaction.