Study on Uniformity of the Airflow Field in a Turbulent Ball Tower for Purification of Hot Press Exhaust Gas from Fiberboard Manufacturing

ZHANG Xin; SONG Jiyuan; DING Tao; WANG Lei; LI Wei; ZHOU Zhaobing

doi:10.12326/j.2096-9694.2024057

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Study on Uniformity of the Airflow Field in a Turbulent Ball Tower for Purification of Hot Press Exhaust Gas from Fiberboard Manufacturing
1.College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,Jiangsu,China
2.Changzhou Yilin Machinery Co.,TD.,Liyang 213333,Jiangsu,China
3.Suqian Yasen Machinery Friend New Materials Co.,Ltd.,Suqian 223700,Jiangsu,China
Vol. 38, Issue 4, Pages: 66-71(2024)
Published： 30 July 2024 ，
DOI： 10.12326/j.2096-9694.2024057
稿件说明：

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张鑫,宋纪元,丁涛等.纤维板热压尾气净化用湍球塔内流场均匀性研究[J].木材科学与技术,2024,38(04):66-71.

ZHANG Xin,SONG Jiyuan,DING Tao,et al.Study on Uniformity of the Airflow Field in a Turbulent Ball Tower for Purification of Hot Press Exhaust Gas from Fiberboard Manufacturing[J].Chinese Journal of Wood Science and Technology,2024,38(04):66-71.
张鑫,宋纪元,丁涛等.纤维板热压尾气净化用湍球塔内流场均匀性研究[J].木材科学与技术,2024,38(04):66-71. DOI： 10.12326/j.2096-9694.2024057.

ZHANG Xin,SONG Jiyuan,DING Tao,et al.Study on Uniformity of the Airflow Field in a Turbulent Ball Tower for Purification of Hot Press Exhaust Gas from Fiberboard Manufacturing[J].Chinese Journal of Wood Science and Technology,2024,38(04):66-71. DOI： 10.12326/j.2096-9694.2024057.

摘要

为提升纤维板热压尾气净化系统中湍球塔除醛除尘的净化效率，研究支承板开孔率对塔内气体流场均匀性的影响。结果发现，支承板开孔率对塔内气体流场的速度分布和压降有显著影响。支承板开孔率为53.3%时，气体流场均匀性达到最优（CV值为0.295），压降较小（32 Pa），可有效地均匀驱动填料球进入流化状态。验证试验显示，湍球塔出风口处甲醛平均浓度比改进前降低，装置的净化效率明显提升。该结果可为纤维板生产排气净化系统湍球塔中其他结构优化设计提供研究思路与实验数据。

Abstract

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.

关键词

纤维板湍球塔支承板开孔率气体流场均匀性数值模拟

Keywords

fiberboardturbulent ball towerperforation ratio of the support plateairflow uniformitynumerical simulation

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