Metal porous membrane tube and preparation method thereof

Abstract

The invention provides a metallic porous membrane tube and a method for preparing the same. A pore precision control layer is attached on the inner wall of a porous metallic supporting tube with a larger pore size, wherein the thickness of the precision control layer is smaller than 500 mu m and the pore size thereof is smaller than 10 mu m. The preparation process is as follows: mixing powder and a dispersant to prepare a slurry; using plastic to coat the outer wall of the supporting tube, sealing one end of the supporting tube, filling the prepared slurry into the porous metallic supporting tube from the other end and sealing the other end of the porous supporting tube, and fixing the porous supporting tube in a centrifugal cylinder; and starting a centrifugal graded putting-down machine, taking out the porous supporting tube with a pore layer from the centrifugal cylinder, and drying and sintering the porous supporting tube to obtain the finished product membrane tube. The metallic porous membrane tube can achieve high filtering precision and large transmission simultaneously; and the preparation method is simple and can avoid the cracks, peelings or local shedding and the like of the precision control layer after the tube is sintered.

Description

technical field

[0001] The invention relates to a metal porous tube and a preparation method thereof, in particular to a metal porous membrane tube used for filtration, separation, fluid distribution, mass transfer and heat transfer in the fields of petroleum, chemical industry, energy, environmental protection, food, pharmacy, etc. its preparation method. Background technique

[0002] Metal porous material is a kind of metal material with obvious pore characteristics (porosity up to 98%). Due to the existence of pores, it presents a series of special functions different from metal dense materials. It is widely used in metallurgical machinery, petrochemical industry Filtration and separation, fluid penetration and distribution control, fluidization, high-efficiency combustion, enhanced mass transfer and heat transfer, flame retardant and explosion-proof in industrial processes such as energy and environmental protection, national defense and military industry, nuclear techno...

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