Industrial Flue Gas Fine Dust Chemical Agglomeration Experimental Research And Numerical Simulation

In view of the low efficiency of traditional dust removal equipment for fine dust removal,the chemical agglomeration pretreatment before dust removal equipment can effectively improve the treatment efficiency.The fine dust of converter steel making was selected for the research of the optimizing in agglomerating agent combination to increase the peak particle size and the study of atomization and agglomeration mechanism in the chemical agglomeration process to provide references for the fine dust removal in industry.Influential factors on the atomization effect of droplets were analyzed by FLUENT simulation.The results show that the droplets gradually decreased with the increasing of pressure and became larger with the increasing of the viscosity of the agglomerating agent.The effect of pressure is stronger than the viscosity of the agglomerating agent.The particle size of the viscous agent spray droplets on the outer side is larger than its inner side,and the spray at lower end is smaller than it at upper end.On the self-built experimental equipment,effects of different agglomerating agents were compared and the agglomerating agent combination was optimized.The results show that the synergistic effect of flocculant,surfactant and ammonium salt can significantly improve the agglomeration.Through the comparison of agglomeration,an agglomeration group combined with flocculant SBE,surfactant TX-100 and NH4 Cl was selected.The agglomeration agent combination can reduce 70.29% of the fine dust.Pore volume,microscopic morphology and the changes in the specific surface area of the fine dust were studied through the nitrogen adsorption experiments and scanning electron microscope observation.The study found that the specific surface area and pore volume have important function in maintaining the stability of the agglomerate.Larger the specific surface area and pore volume of dust can provide better adsorption performance.Two agglomerate structures were found from the dust micro morphology: cluster structure between small dust and large-scale agglomeration core structure.Various structures are formed into larger agglomerates through collision,bridging,electric adsorption,etc.Figure 30;Table 10;Reference 64...