覆膜滤筒侧壁压力正峰值的测试与分析

Pressure Peak Test and Analysis of Membrane Cartridge Filter Side Wall

为研究脉冲喷吹时滤筒侧壁压力正峰值大小对普通聚酯滤筒的清灰性能的影响,针对材质为聚四氟乙烯的覆膜滤筒,采用自制脉冲喷吹实验台,通过测试滤筒侧壁压力正峰值大小,对直径为147 mm、长度为1 000、1 500 mm的两种滤筒进行测试与分析,并与普通聚酯纤维滤筒的侧壁压力正峰值大小相比较。结果表明:聚四氟乙烯覆膜滤筒各测点的压力正峰值约是普通聚酯纤维滤筒的5～10倍,过滤机理主要为表观过滤,且透气性小的聚四氟乙烯覆膜滤筒清灰效果比普通聚酯纤维滤筒要好;在相同条件下,不同长度的滤筒在滤筒长度方向上,其压力值变化趋势不同。

In order to research the effects of peak size of side wall at the time of pulse jet on cleaning performance of normal polyester cartridge. The polytetrafluoroethene （PTFE） microporous membrane filter tube and self-made pulse injection experiment platform was used to tested the pressure peak size of cartridge filter side wall. Two kinds filter tubes with 47 mm in diameter and 1 000, 1 500 mm in length were tested and analyzed, and compared to the pressure peak size of ordinary polyester fiber filter tube. The results showed that the upper, middle and lower pressure peak sizes ofPTFE microporous membrane filter tube were 5-10 times as that of ordinary polyester fiber filter tube. The main filtering mechanism was cartridge cleaning effect of PTFE microporous membrane filter tube whose filtration and ventilation were small was better than ordinary polyester fiber tube. Comparing two kinds of membrane filter tube with 1 000, 1 500 mm in length in the same condition, it was found that the trends of pressure values changes were different in the cartridge length direction.