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| Research on the filtration performance of sintered metal filter tube and the mechanism of back-blowing ash cleaning |
| ZHANG Lifeng1.，YOU Chao1，2.，GUO Qi1，2.，LI Fangxia1，2.，LI Caixia1，2.，NAN Haijuan1，2. |
| （1.National and Local Joint Engineering Research Center for Filtration and Separation Technology，Xi’an 710201,
China； 2.Western BaoDe Technologies Co.,Ltd，Xi’an 710201, China） |
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Abstract Sintered metal filter tube is the core element in the high-temperature gas filter, whose filtration perfor‐
mance 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 dur‐
ing 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/m3, the particle size distribution is basically below 1 μm, 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 fil‐
ter tube, thickness of the dust cake and the shedding of the external dust cake.
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Received: 09 August 2022
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2023, Vol. 33 
