Experimental Study On Desulfurization And Synergistic Effect Of PH Partition

Coal-fired power plants of coal-fired flue gas to remove sulfur dioxide?SO₂?and nitrogen oxide?NO_X?has caused a terrible environmental issues,such as photochemical smog and haze.these problems are the serious influence to people's life.Therefore,the solution is not only the strict emission standard,but also the management of the disposal.Obviously,with the development of society,the research on the method of desulphurization and denitration of coal burning system has never stopped,and green development has become the mainstream of global development.In addition,the technology of desulphurization and denitration has become a hot topic in the research.In this article,through analysis of coal-fired power plant flue gas desulfurization and denitration technology,economy,environment and so on performance,based on the pH partition desulfurization technology was improved,with preoxidation technology to achieve the purpose of the desulfurization denitration at the same time.The effects of the types of absorbents,the kinds of oxidants,the pH of the two towers,the temperature of the two towers,the pH of the two towers,the temperature of the oxidant,the coexistence gas,and the conventional anion were examined.The results showed that the secondary spray tower absorbent was the combination of sodium carbonate and sodium sulfite,and the secondary spray tower absorbent was the first stage spray tower absorbed.Composite oxidants are composed of hydrogen peroxide and sodium persulfate.The pH of the two towers is 10 and 8;The twin towers temperature of 60?;The pH of composite oxidizer is 6;Composite antioxidant atomization temperature is 140?.The efficiency of desulfurization of the whole system is up to 100%and the efficiency of denitration is 91.2%.Coexistence of the gas SO₂ removal efficiency increased with the increase of concentration of SO₂ and NO decrease,and the influence of SO₂ on the NO removal depends on the concentration of SO₂ and NO the appropriate increase of initial concentration of SO₂removal,the increase of O₂ content influence on SO₂ removal efficiency is not obvious or slightly,the presence of CO₂ on removal of SO₂ and NO_X plays a significant inhibitory effect.In the conventional anionic experiment,the addition of bromide ions in the first stage of spray tower significantly affected the desulfurization efficiency,and the hydrogenation root and sulfuric acid root obviously affected the removal efficiency of nitric oxide.In the secondary spray tower,Cl^-,NO^2-and Br^-promoted the removal of nitric oxide.After the experimental research,the system used in power plants and industrial boilers has great potential.