Performance Analysis And Optimization Study Of Compound Demister

In the 21 st century,building a strong oceanic country is an important part of building a strong socialist modernization nation.The impact of the marine atmospheric environment on the corrosion of offshore electrical equipment cannot be ignored,one of the most influential factors is the high concentration of salt mist in the marine atmosphere.At present,there is very little research on multi-stage demisters at home and abroad,in this paper,the composite defogger combined with the baffle defogger and electric defogger is taken as the research object,and the method of combining theoretical analysis and numerical simulation research is used,to analyze the factors that affect the efficiency of the compound defogger.In this paper,based on COMSOL numerical simulation software,the two-dimensional numerical simulation of the gas flow field,corona electric field and particle motion field of the compound demister is carried out.Consult a large number of related literatures,the flow field uses the turbulent k-? double equation model,the corona electric field uses the corona discharge model in the plasma module,and the particle motion field uses the particle tracking model in fluid flow.By changing the boundary conditions,the particle trajectories and efficiency curves at different flow rates,particle sizes,and voltages are obtained.Combined with the particle movement trajectory,intuitively observe the movement state of the air flow in the compound demister and the movement trajectory of the droplets.Analyze the influence of different on particle trajectory and defogging efficiency,and sunnarize the general law of compound demister performance.In order to further improve the defogging efficiency of the compound defogger,it breaks through the limitation of the poor defogging effect of small-sized droplets.Based on the original research model,this paper analyzes the efficiency change law under different structural parameters and provides reasonable optimization design suggestions from the three aspects of plate spacing,plate length,and airflow mixing channel length.The results show: the defogging efficiency of the compound demister is positively correlated with particle size and voltage,and negatively correlated with flow velocity.For droplets with a particle size of less than 12?m,the flow velocity has a greater effect on the defogging efficiency.When the flow rate is low,the voltage has a greater effect on small-size droplets,and increasing the voltage can effectively improve efficiency.In terms of optimized design: the defogging efficiency is negatively related to the distance between the plates,and positively related to the length of the plates and the length of the air mixing channel.When the length of the air flow mixing channel is 1.5m,the effect of defogging is the best.When the flow velocity is 1.5m/s?2.5m/s,it is most appropriate to choose 0.8m for the the air flow mixing channel length.