Preparation method of microfiltration food-grade filtering material

Abstract

The invention provides a preparation method of a microfiltration food-grade filtering material. The preparation method has the advantages that the preparation of the filtering material is simple, thematerial cannot fall off, backwashing can be performed under any conditions, the requirements of different enterprises on objects are met, the preparation is simple and easy to operate, and the operation cost of the enterprises is reduced. High molecular weight HDPE particles are frozen to be -20 DEG C or lower, then the HDPE particles are pulverized by adopting a high speed pulverizer to obtain powder particles of which the particle sizes are 20-40 mu m, and the powder particles are poured in a corresponding form of a die, and are sintered at a high temperature and cooled to obtain the corresponding shape of the microfiltration food-grade filtering material with the filtering precision being 0.08-0.12 mu m.

Description

technical field [0001] The invention relates to the technical field of microfiltration materials, in particular to a preparation method of microfiltration food-grade filtration materials. Background technique [0002] At present, the microfiltration food-grade filter materials on the market include hollow fiber membranes and open-pore ultra-high polymer tube sheet coatings, which all have corresponding shortcomings, among which: [0003] 1. The disadvantage of hollow fiber membrane is that it needs strict pre-filtration, it is difficult to clean, and the cost of membrane replacement is high. Once damaged, the whole membrane will be scrapped, and the flow resistance in the fiber tube is very large, the pressure loss is large, and it is not suitable for handling viscous liquid. The production process Complex, the hollow fiber membrane has organic soluble chemical residues, single structure, cannot be backwashed, the filtration accuracy is not enough, and the service life is sh...

AI Technical Summary

Problems solved by technology

[0003] 1. The disadvantage of hollow fiber membrane is that it needs strict pre-filtration, it is difficult to clean, and the cost of membrane replacement is high. Once damaged, the whole membrane will be scrapped, and the flow resistance in the fiber tube is very large, the pressure loss is large, and it is not suitable for handling viscous liquid. The production process Complex, the hollow fiber membrane has organic soluble chemical residues, single structure, cannot be backwashed, the filtration accuracy is not enough, and the service life is short;

[0004] 2. Open-hole ultra-high polymer tube sheet coating, the complex process contains organic solvents in the film and it is easy to fall off

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