移动床颗粒层除尘器除尘效率研究

在分析颗粒层的过滤机理和影响移动床颗粒层除尘器除尘效率因素的基础上，用多因子正交法在实验室上初步研究了过滤气速，颗粒的尺寸和种类，颗粒层厚度和颗粒层中的尘含量等因素对除尘效率的影响。并在工业装置上进行了试验验证。实验证明，适宜的过滤气速为０．２ｍ／ｓ，床内颗粒直径取１－２ｍｍ较好，床层厚度应等于或略大于１５０ｍｍ。

Study on the Collection Efficiency of a Granulesmoving Bed Dust Filter

Based on analysing the mechanism of filtration through a granule layer and the factors affecting the dust collection efficiency of a granule layer moving bed filter, an orthogonal multi-factor method was used in a laboratory apparatus to preliminarily study the effects of the factors such as the filtration velocity, the size and type of particles, the bed thickness, and the dust load of granule layer, on the dust collection efficiency. Then, a demonstration was made in an industrial pilot plant. The results showed that the suitable filtration velocity was 0. 2m/s, the particle size in the moving bed was preferred in 1-2mm,and the bed thickness should be equal to or slightly more than 150mm.