Influence and Analysis for Different Spray Absorbing Liquids on the Distributed Laboratory Pretreatment Acidic Waste Gas Treatment System
This study established a pilot-scale system which primarily employs the principal of spraying for the removal of acidic waste gases in a laboratory.The research investigated the treatment effects under different operating conditions for sulfuric acid mist,nitric acid mist,HCl,HF,etc.,using three types of spray liquids.The study aimed to explore the impact of various spray absorption liquids on the removal efficiency of distributed laboratory pre-treatment acidic waste gases.The results indicated that,with a spray water volume of 8 L/min,a water temperature of 15-20 ℃,and a system fume hood cross-sectional air velocity of 0.3-0.5 m/s,the alkaline spray solution exhibited the highest average removal efficiency for acid mist.The removal efficiencies for F-,Cl-,NO3-,and SO42-were 93.1％,91.7％,88.3％,and 92.4％,respectively.Water spray absorption liquid exhibited average removal efficiencies of 68.8％,67.8％,and 64.9％for F-,Cl-,and NO3-,respectively.The removal efficiency of F-,Cl-,and NO3-in the micro-nanobubbles water spray absorption liquid was approximately 13％higher than that in the water spray absorption liquid.Additionally,nano-bubble spray liquid effectively treated SO2 and NOx,with a more significant effect on NOx.which is related to the oxidation of radicals such as·OH and other similar radicals generated by microbubble collapse,as well as the high Zeta potential,large surface area,and the potential of micro-nano bubbles to act as heterogeneous condensation nuclei.
acid mist treatmentdesulfurization and denitrificationmicro-nano bubblesspray system
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