采用过滤精度为0.5μm的金属微孔膜除尘器在国内某羰基镍生产线上进行应用研究,研究了过滤后粉尘浓度的变化、过滤压差随时间的变化以及除尘器的反吹再生技术。研究表明,金属微孔膜除尘器能有效拦截羰基镍合成气中的固体颗粒。随着过滤...采用过滤精度为0.5μm的金属微孔膜除尘器在国内某羰基镍生产线上进行应用研究,研究了过滤后粉尘浓度的变化、过滤压差随时间的变化以及除尘器的反吹再生技术。研究表明,金属微孔膜除尘器能有效拦截羰基镍合成气中的固体颗粒。随着过滤时间的增加,过滤压差先上升后下降,最佳反吹再生工艺是在较短的时间内将氮气气包内较大的压力泄至系统压力。经过反吹再生工艺,除尘器可实现在22 k Pa的范围内长期稳定运行。金属微孔膜除尘器对保障羰基镍合成工序及随后分解工序的连续运行起到了明显作用。展开更多
Microporous polyolefin hollow fiber membranes were prepared from high density polyethylene (HDPE)-paraffin solution via thermally induced phase separation (TIPS) method. Effects of extraction and cold-drawing cond...Microporous polyolefin hollow fiber membranes were prepared from high density polyethylene (HDPE)-paraffin solution via thermally induced phase separation (TIPS) method. Effects of extraction and cold-drawing condition on membrane structure and performance were investigated.Five volatile solvents were used as extractant. Dimension of hollow fiber and gas permeation rate of membrane were measured. Mierostructure of membrane was examined by Scanning Electronic Microscope (SEM). The results show that the membrane treated by pentane possesses a higher porosity, nitrogen permeability and lower shrinkage than those of membranes extracted by other three extractants. It is also found that the membrane stretched 133% shows the highest porosity and gas permeability in this study.展开更多
文摘采用过滤精度为0.5μm的金属微孔膜除尘器在国内某羰基镍生产线上进行应用研究,研究了过滤后粉尘浓度的变化、过滤压差随时间的变化以及除尘器的反吹再生技术。研究表明,金属微孔膜除尘器能有效拦截羰基镍合成气中的固体颗粒。随着过滤时间的增加,过滤压差先上升后下降,最佳反吹再生工艺是在较短的时间内将氮气气包内较大的压力泄至系统压力。经过反吹再生工艺,除尘器可实现在22 k Pa的范围内长期稳定运行。金属微孔膜除尘器对保障羰基镍合成工序及随后分解工序的连续运行起到了明显作用。
基金Supported by Zhejiang Natural Science Foundation (ZJNSF Y404096) and SRF for ROCS ,SEM
文摘Microporous polyolefin hollow fiber membranes were prepared from high density polyethylene (HDPE)-paraffin solution via thermally induced phase separation (TIPS) method. Effects of extraction and cold-drawing condition on membrane structure and performance were investigated.Five volatile solvents were used as extractant. Dimension of hollow fiber and gas permeation rate of membrane were measured. Mierostructure of membrane was examined by Scanning Electronic Microscope (SEM). The results show that the membrane treated by pentane possesses a higher porosity, nitrogen permeability and lower shrinkage than those of membranes extracted by other three extractants. It is also found that the membrane stretched 133% shows the highest porosity and gas permeability in this study.