操作参数对水力喷射空气旋流器脱除细颗粒物的影响

doi:10.16085/j.issn.1000-6613.2017.04.007

摘要/Abstract

摘要： 工业生产过程中排放大量有毒有害细颗粒物，对环境和人体健康威胁严重，急需治理。针对传统湿法除尘设备效率较低的问题，本文采用液相射流和空气旋流耦合作用的静态超重力设备——水力喷射空气旋流器（WSA），以平均粒径为1.56μm的滑石粉模拟细颗粒物，研究考察了粉尘初始浓度、液相射流流速、进口气速等操作参数对WSA的总除尘率η的影响；并对实验数据进行归纳分析，总结了操作参数与除尘率之间的数学关系模型。结果表明，WSA对PM_2.5含量为74.15%的粉尘样品的除尘率最高达93%以上，尤其是粒径为1.8μm以上的细颗粒物，去除率可达100%；WSA的除尘率随着进气速度、射流速度及粉尘浓度的增大而增大，两者之间关系式为：η=133.61×Re_g^0.026×Re_l^0.027×（c_s/ρ_s）^0.065。本工作为工业细颗粒的脱除提供了一种新的方法。

关键词: 捕集, 多相流, 气体旋流器, 湿法除尘, 模型

Abstract: With the rapid development of industry in China,mass of fine particulate matter is emitted to the air,which is a big threat to the environment and public health. In order to overcome the shortage of low efficiency of traditional wet dust collection devices,a new device of water-sparged aerocyclone(WSA) was used for removal of model PM_2.5 sample of talcum powder with average particle size of 1.56 μm. The effects of operation parameters of initial concentration of dust,liquid jet velocity,gas inlet velocity on the total removal efficiency(η) of dust were investigated. Besides, experimental data was then summarized and analyzed to obtain the relationship between operating parameters and the removal efficiency. Results showed that the highest removal efficiency of fine particulate matter with 74.15% of the PM_2.5 was over 93%. When the WSA was used to treat the dusty gas,it is particularly effective to the particulate matter whose diameter is bigger than 1.8 μm,the removal efficiency can even reach to 100%. The removal efficiency increased with the increase of initial concentration of dust,liquid jet velocity and gas inlet velocity,which follows the formula of η=133.61×Re_g^0.026×Re_l^0.027×(c_s/ρ_s)^0.065. The formula was proved to be useful in forecasting the removal performance of dust of the WSA. This investigation could develop a new process in removing industrial fine particulate matter.

Key words: capture, multiphase flow, gas cyclone, wet collection, model

中图分类号:

TQ028.8

程治良, 全学军, 李硕, 李瑞恒, 徐飞. 操作参数对水力喷射空气旋流器脱除细颗粒物的影响[J]. 化工进展, 2017, 36(04): 1202-1208.

CHENG Zhiliang, QUAN Xuejun, LI Shuo, LI Ruiheng, XU Fei. Effect of operation parameters on removal efficiency of fine particles in a water-sparged aerocyclone[J]. Chemical Industry and Engineering Progress, 2017, 36(04): 1202-1208.

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