Study on Uniformity of the Airflow Field in a Turbulent Ball Tower for Purification of Hot Press Exhaust Gas from Fiberboard Manufacturing
To improve the purification efficiency of the turbulent ball tower for removing formaldehyde from fiberboard hot pressing exhaust gas,the authors evaluated the effect of the perforation ratio of the support plate on the uniformity of the gas flow field inside the tower.The results showed that the support plate's perforation ratio had a significant impact on the velocity distribution and pressure consumption of the gas flow field inside the tower.When the perforation ratio of the support plate was 53.3%,the uniformity of the airflow field reached its optimum(CV value of 0.295),and the pressure consumption was relatively small at 32 Pa,which could effectively drive the packing balls into a fluidized state uniformly.The verification experiment showed that the average concentration of formaldehyde at the outlet of the turbulence tower decreased compared to before the improvement,and the purification efficiency of the device was significantly improved.The result provides research ideas and experimental data for the optimization design of other structures in the turbulence tower of the exhaust purification system for fiberboard production.
fiberboardturbulent ball towerperforation ratio of the support plateairflow uniformitynumerical simulation
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