烧结金属过滤管过滤性能及反吹清灰机制研究  

Research on the filtration performance of sintered metal filter tube and the mechanism of back-blowing ash cleaning

作　　者：张立峰 尤超 郭齐 李芳侠 李彩霞 南海娟 ZHANG Lifeng;YOU Chao;GUO Qi;LI Fangxia;LI Caixia;NAN Haijuan(National and Local Joint Engineering Research Center for Filtration and Separation Technology,Xi'an 710201,China;Western BaoDe Technologies Co.,Ltd,Xi'an 710201,China)

机构地区：[1]过滤与分离技术国家地方联合工程研究中心,陕西西安710201 [2]西部宝德科技股份有限公司,陕西西安710201

出　　处：《粉末冶金工业》2023年第3期96-100,106,共6页Powder Metallurgy Industry

基　　金：陕西省创新能力支撑计划项目(2019PT-28)。

摘　　要：烧结金属过滤管是高温气体过滤器中的核心元件,其过滤性能的好坏直接关系到下游安全生产。通过对烧结金属过滤管的循环压降、脉冲反吹过程中过滤管内部动态压力变化、粉尘层的动态脱落情况、粉尘层厚度变化以及出口浓度进行检测并分析,发现烧结金属过滤管的过滤性能较好,过滤后的气体中所含的颗粒物浓度小于10 mg/m^(3),且粒径分布基本上都在1μm以下,满足过滤要求。过滤管内部的动态压力变化与外部的粉尘层厚度随时间变化的趋势相一致,当过滤管内部动态压力达到最大时,外部粉尘层也蓬松到最大值。结合过滤管内部的动态压力变化、外部的粉尘层脱落情况以及粉尘层厚度变化,使用脉冲反吹方式可以完成烧结金属过滤管的循环性能再生功能。Sintered metal filter tube is the core element in the high-temperature gas filter,whose filtration performance is directly related to the downstream safety production.In this paper,through the analysis of the circulating pressure drop of the sintered metal filter tube,the dynamic pressure change inside the sintered metal filter tube during the pulse-back process,changes in the thickness of the dust cake,the shedding of the dust cake and the outlet concentration,it is found that the sintered metal filter tube has the better filtration performance,the concentration of particles is less than 10 mg/m^(3),the particle size distribution is basically below 1μm,which meets the filtration requirements.The dynamic pressure change inside the filter tube is consistent with the trend of the thickness of the dust cake changing with time.When the dynamic pressure inside the filter tube reaches the maximum,the dust cake is also fluffy to the maximum.The cycle performance regeneration function of the sintered metal filter tube could be completed by using a low pulse-back pressure combined with the dynamic pressure change inside the filter tube,thickness of the dust cake and the shedding of the external dust cake.

关 键 词：烧结金属 过滤性能 反吹 动态压力 粉尘层脱落 

分 类 号：TH69[机械工程—机械制造及自动化]