Precision micro hole filtering method and device for winterization edible oil defatted wax

Abstract

The present invention is the precise microporous filtering process and apparatus for defatting and dewaxing winterized edible oil. The process includes the following steps: filtering the winterized edible oil in precise microporous filtering machine to obtain filtrate as refined edible oil; back blowing with normal temperature compressed air for 4-6 times or back blowing with hot compressed air at 65-70 deg.c in raised filtering pressure difference; and chemical regeneration of the precise microporous filtering machine with regenerating solution capable of dissolving niger and phospholipid from regenerating solution tanks. The apparatus includes compressor tank with outer coiled pipe jacket, precise microporous filtering machine with water cooling jacket, and rigid microporous filtering pipe. The present invention has the advantages of complete defatting and dewaxing, high filtering precision, high filtering efficiency, high regeneration efficiency, etc.

Description

technical field [0001] The invention relates to a filtration method and a device for implementing the method, in particular to a precision microporous filtration method and a device for degreasing and dewaxing winterized edible oil. Background technique [0002] After the edible oil is winterized at low temperature for a certain period of time, the fat and wax in it will form crystals and precipitate out. If these crystals are completely filtered out, high-quality edible oil can be obtained. At present, four types of filters are basically used in industrial production at home and abroad, one of which is a leaf filter whose filter medium is filter cloth or wire mesh; the second type is an ordinary plate and frame filter press whose filter medium is basically a filter. cloth; the third type is a tubular filter, the filter medium is basically filter cloth; the fourth type is a plate and frame filter press with heat unloading wax. The common disadvantage o...

AI Technical Summary

Problems solved by technology

The common disadvantage of these four types of filters is that the pore diameters of the wire mesh and the filter cloth are large, so that the separation efficiency is not high, and the filtration accuracy is low. Especially during the start-up period, the filtrate is mixed. There are still some fine crystals that cannot be filtered

Grease and wax removal are required after filtration. The first three types of grease removal and wax removal are not complete. The second type of plate and frame filter press needs to disassemble the plate and frame when removing grease and wax, which is very troublesome.

The fourth type of plate and frame filter press for heat unloading fat and wax does not need to assemble and disassemble the plate and frame, but each time hot water or steam needs to enter the plate and frame filter press to heat and melt the grease and wax filter cake into a liquid, which requires consumption A lot of energy, and the filter equipment is huge

In order to improve the filtration accuracy and filtration speed, and to facilitate the degreasing of wax filter cakes, especially the first three types of filters, some filter aids are added to the winterized oil before filtration, which not only increases the filtration cost, but also adds another A filter that separates filter aids from wax and fat will significantly increase investment and operating costs

In addition, in order to keep the temperature of the above-mentioned plate and frame filter from rising when filtering, there should be a special freezing room with a lower temperature, resulting in a substantial increase in energy consumption

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