SU850108A1 - Extractor for solid-liquid system - Google Patents

Description

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I The invention relates to microbial, food, oil and fat, perfume industries and is intended for extraction in a solid-liquid system, for example, for extraction of yeast biomass or other microorganisms with solvents from lipids and non-distilled hydrocarbons.

An extruder is known for a solid-liquid system that includes a cylindrical body with a rotor divided by radial partitions into chambers equipped with hinged bottoms and a irrigation system with a shut-off valve; 1m in the upper part, solids collectors, devices for loading and unloading solids

A disadvantage of the known device is that the rate of percolation of the solvent through the layer is low because of the following: vanilla, formation of channels in the layer, due to which solvent leakage and uneven contact of the extractant and abaterable material are observed; limited use of the apparatus for the extraction of materials with specific properties, fine structure, tendency ..

to caking, as well as spraying lyophilic properties.

The purpose of the invention is to intensify the process by increasing the rate of percolation of the solvent and increasing the uniformity of the contact of the phases.

This goal is achieved by the fact that the well-known extractor, including a cylindrical body with a rotor, is divided into radial partitions into chambers equipped with flip-down bottoms and an irrigation system with a shut-off valve in the upper part, solvent collections, loading devices and

ts discharging solids is provided with rods installed with the possibility of reciprocating motion, with agitators / guides and a lever mounted on them, combined with a shut-off valve.

 Moreover, the agitators are displaced one at a time by the height of the thrust 30–45.

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FIG. 1 shows the extractor, the overall appearance; in fig. 2 is a longitudinal section of the extractor; in fig. 3 is a vertical section of one of the cells of the extractor.

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. The proposed extractor includes a cylindrical housing 1, inside which is placed a rotor 2 on a vertical shaft 3 with folding heads 4. Sprayers 5 are also placed inside the case. The rotor is divided into a number of cells 6 inside which are placed agitators 7 located in several rows in height rod 8 with their displacement in the plan for 30-45. The bottom of the housing 9 is divided into a series of radial collectors 10 for collecting the solvent flowing out of the wells; circulation pumps 11 are connected to the collection KciM for supplying the solvent to the irrigation layer. The bottom has a discharge port 12 for discharging the extracted material. For loading the raw material, the apparatus is equipped with a dosing screw 13, and for unloading with a screw 14.

To alternate the shaking and irrigation modes of the layer in the housing, an endless guide 15 is placed, having a figured profile consisting of straight irrigation sections and curvilinear shaking sections. A valve 16 is connected to the lever 17 to regulate the solvent supply.

The shape of the curved sections is determined by the properties of the material being processed (the tendency to caking, bulk density, particle size),

The extractor works as follows.

The solid phase is fed into the cell of rotor 2 by a donating screw 13 in a given amount. As the rotor rotates, the filled cell moves and subsequently becomes under the spraying devices 5, from which the extractant with different concentrations of the extracted substances flows out at different feed points. Moreover, the movement of solvents through the apparatus is carried out countercurrently to the movement of the solid phase. The cell filled with fresh product is irrigated with the most concentrated solvent, which after percolation is removed from the extractor. The product at the end of the process is irrigated (washed) with a pure solvent. After percolation, the solvent is collected in collections and then returned to irrigation by centrifugal pumps, and the product is discharged by a discharge screw 14.

Each cell of the extractor is equipped with agitators 7; mounted

on rod 8, which slides along a continuous guide 15. At the moment when the rod slides along the upstream section of the guide, it rises, and the agitators shake the layer so that it becomes well-wetted with a solvent with significantly improved drainage properties and ruined canals. For better use of the Q solvent at the time of lifting the rod, the stop valve 16 is closed by means of the lever 17 which is in contact with the rod 8. In order to avoid small particles being carried away, the solvent is irrigated only when the rod leash is on the horizontal section of the guide and agitating material not happening.

 The proposed design of the extractor allows a 20–30% increase in the rate of percolation of the solvent through the solid phase layer, and uniform irrigation and contact of the interacting phases is achieved, the circulation ratio of the extractant increases, and hence the density of irrigation increases, the efficiency of the use of the extractant increases. shaking a layer of material destroys the channels.

Claims (2)

1. Extractor for solid-liquid system, comprising a cylindrical body with a rotor divided by radial partitions into chambers equipped with hinged bottoms and an irrigation system with a shut-off valve at the top, parts, solvent collectors, solids loading and unloading devices, characterized in that, in order to intensify the process by increasing the solvent percolation rate and increasing the uniformity of the contact of the phases, it is equipped with rods, reciprocating, with Q-hogs, a guide and a lever connected to a shut-off valve. 2. Extractor pop. 1, characterized in that the agitators are offset relative to each other by 5 height of the rod at 30-45 °. Sources of information taken into account in the examination 1. Patent of Great Britain No. 1142463, cl. F 3 A, 1969 (prototype). IS n . SL I I I and I And I LJ I t LLJ 4t eight