Continuous countercurrent extraction desolventizing system and process

Abstract

The invention belongs to the technical field of material extraction, and particularly discloses a continuous counter-current extraction desolventizing system and a continuous counter-current extraction desolventizing process, which are suitable for squeezing fish meal, palm kernel cakes, tea seed cakes, saponin polysaccharide extracted from tea seed cakes, pigment extracted from corn protein powder and the like, and comprise a conveyor, a feeder connected with the conveyor, and a horizontal multi-stage counter-current extractor connected with the feeder, a discharge hole of the horizontal multi-stage counter-current extractor is directly connected with the drag chain type extractor or is extruded by the extrusion separator, a solid is connected with the drag chain type extractor, and a liquid is conveyed to the last stage for cyclic extraction through the extract circulating pump; a material outlet in the bottom of the extraction device is conveyed to a desolventizing machine through a scraper conveyor or passes through an extrusion separator and then is conveyed to the desolventizing machine through the scraper conveyor, liquid is conveyed to the last-stage extraction section for circulation through a solvent circulating pump, and an outlet of the desolventizing machine is conveyed to a finished product warehouse through a conveyor. And the permeation effect of the solvent in the material is good.

Description

technical field [0001] The invention belongs to the technical field of material extraction, and in particular relates to a continuous countercurrent extraction and desolvation system and a process. Background technique [0002] The traditional extraction process generally adopts the method of drag chain extractor or vertical mixing extractor + inclined bucket extractor to extract powdery materials. Since the vertical mixing extractor + inclined bucket extractor is a tank that communicates up and down, it is difficult for the mixed oil to form a concentration gradient in the extractor, and the sedimentation speed of the material in the solvent is difficult to control. During the process, the material and the mixed liquid are scraped and scooped into the bucket. During the process, the material settles in the lower part of the bucket, and the mixed liquid is in the upper part of the bucket. The mixed liquid in the bucket in the upper draining section cannot be separated, and t...

AI Technical Summary

Problems solved by technology

However, the drag-chain type extractor is only used for extraction, and the powder material does not have a wetting process in the early stage, and the penetration effect of the solvent (mixed oil) in the material is often not ideal, and the extraction effect cannot be guaranteed.

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