The Experimental Study Of Simulation Of SO₃ Deprivation In Smoke

At present coal burning power generation is still the main way of electric energy conversion in China.Based on coal-fired power plants,the source of the SO₃ is analyzed in this paper.And the existing SO₃ sampling,measuring method are summarized in detail both at home and abroad.For coal-fired power stations,the removal strategies of SO₃ emission are proposed,though injection of alkaline substances,the SO₃ concentration in the chimney was reduced successfully,and solved the chimney opaque and acid fog.In this paper SO₃ was prepared by ozone oxidation method,detected by control condensation method,and removed through the alkaline adsorbent.For coal-fired power plants,It can improve the S0₃ removal efficiency and determin the optimum removal conditions by changing the adsorbent particle size and other factors,then provide theoretical conditions alkaline absorber desulphurization process.In this paper,the experimental study of removal SO₃ from flue gas of coal-fired power plants was simulated on different conditions of flue gas and different particle size of adsorbent.The experiment mainly consists of three parts:the smoke generating system,the flue gas detection system and the flue gas removal system.The experimental method about Smoke generating system is ozone oxidation method.For the detection system,we use isopropanol absorption liquid to absorpt SO₃,then use spectrophotometer to detect the absorbent.Spectrophotometer wavelength is530nm.The standard curve of Ba²⁺in volume is y=0.388x+05264,and the standard curve of SO₄^2-in mass is y=-0.01141x+0.91382,the respective degree are high.For removal system,we measure the removal efficiency at different temperatures conditions of 300??400??500??600?and different sizes conditions of 200mesh?300 mesh?400 mesh?500 mesh.The results showed that the highest removal efficiency of SO₃ can reach 95.51%at the condition of 500 mesh to 500?.In this condition,we respectively pass the different flue gas conditions of NH₃?NO?NH₃ mix NO to explore the removal efficiency of the absorbent.The results were 94.07%?94.94%and 93.98%respectively.It can be concluded that the inhibitory effect of NH₃on the removal of SO₃ is greater than that of NO.Under the mixture condition,the inhibitory effect of the two is higher than that of the adsorbent of SO₃ under the single condition.