Technological Design And Experimental Study Of The Ship Flue Gas Swirl Atomization Desulfurization System

With the development of the ship transportation industry,the air pollution hazards caused by sulfur emissions from ship smoke cannot be ignored,which has a serious impact on human survival and health.The International Maritime Organization?IMO?has formulated strict regulations on ship smoke emissions The standard and a clear implementation time are given.Among the above regulations,the ship flue gas desulfurization technology has the best feasibility and its application prospects are broader.Based on the in-depth research and analysis of the existing ship flue gas desulfurization technology,this paper finds that the existing ship flue gas desulfurization technology has the problems of low desulfurization efficiency and high system energy consumption.To compensate for the shortcomings of existing ship flue gas desulfurization technology,this article combines the sulfur emission requirements stipulated by the International Maritime Organization?IMO?and the actual navigation characteristics of the target ship,proposes to apply the swirl atomization method to ship flue gas desulfurization,and design a ship flue gas swirl atomization desulfurization system,and material balance analysis and energy balance analysis of the system's process plan.This article takes the transformation of container ship's power flue gas desulfurization system as an example.Through the design of the process plan of the ship's flue gas swirling atomization desulfurization system and the ocean navigation test,the reliability and stability of the system are verified,and the flue gas volume is obtained through the test.,The flue gas inlet SO₂ concentration,seawater volume,liquid-gas ratio and other parameters affect the system's desulfurization characteristics,and the pressure drop of the system under different working conditions is obtained.The test results are as follows:?1?The SO₂/CO₂ value of the flue gas emitted by the marine diesel engine after the system purification,the p H,turbidity and polycyclic aromatic hydrocarbons of the generated wash water after the system treatment all meet the limits specified in MEPC184?59?.The parameters of the swirl atomization desulfurization system meet the relevant requirements of IMO,and the system operates stably and reliably.?2?The desulfurization efficiency of the system decreases with the increase of flue gas flow rate and flue gas inlet SO₂ concentration,and increases with the increase of seawater volume.The p H value of the washing water decreases with the increase of the load of the diesel engine.Under the design conditions The desulfurization efficiency of the system is above 96%.?3?When the liquid-gas ratio is in the range of 6-16 L/m³,the desulfurization efficiency increases as the liquid-gas ratio increases.After the liquid-gas ratio exceeds 9 L/m³,the desulfurization efficiency increases more slowly.The actual operating liquid to gas ratio of the actual test of the ship's flue gas atomization system is 8.75L/m³?4?When the ship is operating at a maximum main engine load of 75%,the maximum pressure drop of the system is about 650Pa,which is far lower than the maximum allowable main engine exhaust back pressure of 3320Pa under this operating condition,which achieves the low resistance of the desulfurization system.Through the above research,this paper obtains the typical design and process route of the ship's flue gas dynamic high efficiency deep swirl atomization desulfurization system,which provides a forward-looking reference for the further research and development of the ship's flue gas desulfurization technology.