Water Model Experiment Of Synergistic Defluorination And Desulfurization Technology With Mesoscale Reinforcement

In order to solve the main component of hydrogen fluoride and sulfur dioxide in the electrolytic aluminum gas pollutant,this project is based on the integrated ammonia desulphurization and defluorination method proposed by the Yunnan Asia Pacific Economic Limited,and the optimization of the technology and preparation of the defluorination and desulphurization method of the ammonia process is realized.Ammonia defluorination and desulphurization method is removing fluoride from the process of desulphurization by ammonia,in order to achieve greater economic benefits.Ammonia defluorination technology mainly involves gas-liquid two phase reaction,water model experiment was set up based on similarity principle,in the air-water system and the CO2-NaOH solution system,by using combination methods of high speed camera,image analysis and dimensional analysis to research the effect of gas flow,liquid gas ratio,packing type,packing size,physical parameters and other operating parameters on gas-liquid two phase reaction in the packed tower.Main research results are presented as follows:(1)When examining the effect of gas flow,the law of the change of the Bauer ring and the step ring conforms to:The average diameter of the bubble decreases first and then increase with the increase of gas flow,and the average diameter of the bubble is the smallest when the gas flow rate is 1.5m3/h.The investigation of the influence of the ratio of liquid gas,the average diameter of the bubble decreases with the increase of the liquid gas ratio,and the ratio of liquid to gas is 8 by comparing the decrease of the bubble diameter.(2)The diameter of the bubble can be obtained by image processing after processing the pictures taken by the high-speed camera,dimensionless analysis of the main influencing factors of bubble diameter,and fitting with experimental data,the quasi equation is available for the average diameter of bubbles in DN16mm Bauer's rings:(3)In the absorption rate experiment,the changes of the Bauer ring and the step ring are all in accordance with the following:NaOH absorption CO2 volume transfer coefficient increase first and then decrease with the increase of gas flow,and increase with the increase of liquid-gas ratio.(4)The law of the size of the packing under the same type of packing as follows:DN16mm Bauer ring's bubble diameter,NaOH absorption CO2 volume transfer coefficient AK and CO2 utilization ? larger than DN25mm Bauer ring at the same gas flow ratio and liquid gas ratio,indicating that the gas and liquid mass transfer absorption rate of DN16mm Bauer ring is faster than that of DN25mm Bauer ring.The variation of different filler types in the same size is:DN16mm Bauer ring's bubble diameter,NaOH absorption CO2 volume transfer coefficient AK and CO2 utilization ? larger than DN16mm ladder ring at the same gas flow ratio and liquid gas ratio,indicating that the gas and liquid mass transfer absorption rate of the DN16mm Bauer ring is faster than that of the DN16mm ladder ring.