Working performance of jet strengthening non-packing dissolved air equipment
Dissolved air equipment is an important part of dissolved air release microbubble generation system.Based on the self-designed and developed jet-enhanced non-packed dissolved air equipment,this paper carried out experimental research on its working performance under different operating parameters.The WTW dissolved oxygen measurement equipment was used to measure the on-line pressure of the whole process,and the dissolved air performance was directly characterized by the change rate of dissolved oxygen concentration in water.The experimental results showed that the new dissolved air equipment still had high dissolved air performance under low energy consumption.The dissolved air performance increased with the increase of gas liquid ratio.The dissolved gas efficiency decreased with the increase of dissolved gas pressure,and increased first and then decreased with the increase of inlet water flow rate.The oxygen transfer mass transfer coefficient increased with the increase of dissolved gas pressure and inlet water flow rate.The optimal inlet flow rate range was between 0.7m3/h and 0.9m3/h.Because the new dissolved air equipment can still produce high-quality fine bubbles when using ordinary ball valves to reduce pressure and release gas to form bubbles,it occupied a smaller area than traditional equipment and was not easy to block,so it had more advantages in practical engineering applications.
dissolving air equipmentjet intensificationdissolved air performancedissolved oxygen concentrationgas-liquid flowmultiphase reaction
国家科技期刊平台
NSTL
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