RU217432U1 - Screw extractor - Google Patents

Abstract

The screw extractor belongs to the field of extraction and concentration of microimpurities in analytical chemistry, concerns the designs of mass and heat exchangers used in sample preparation in determining the content of pollution in environmental objects, can be used in industry for extraction and concentration of substances in various technological processes. The objective of the utility model is to simplify the process of obtaining different volumes of extract in the separation process. The technical problem is solved by the fact that the screw extractor contains a base, a rotor consisting of a cylindrical extraction glass and a collector with overflow devices, a rotor and mixer drive, while the collector is equipped with an annular chamber, a gasket and radially directed drain pipes, the rotor is equipped with a casing with an annular channel and drain plug.

Description

The utility model relates to the field of extraction and concentration of microimpurities in analytical chemistry, concerns the designs of mass and heat exchangers used in sample preparation in determining the content of pollution in environmental objects, can be used in industry for the processes of extraction and concentration of substances in various technological processes.

A screw extractor is known (Patent RU No. 153192, IPC B01D 11/02 - 10.07.2015, Bull. No. 19), containing a base, a stirrer, a rotor consisting of an extraction cup and a manifold separated by an annular gasket, a rotor and stirrer drive, an extraction cup made with a drain fitting with a valve, removable extract collectors are installed on the outer cylindrical surface of the collector, fixed with a clamping ring, radially directed drain tubes are installed in the collector and removable collectors, the collector is equipped with a casing with a drain fitting.

This patent is taken as a prototype.

The disadvantage is the complexity of the design.

The objective of the utility model is to simplify the process of obtaining different volumes of extract in the separation process.

The technical problem is solved by the fact that the screw extractor, containing a base, a rotor consisting of a cylindrical extraction glass and a collector with overflow devices, a rotor and mixer drive, while the collector is equipped with an annular chamber, a gasket and radially directed drain pipes, the rotor is equipped with a casing with an annular channel and drain plug.

Details, features, and advantages of this utility model follow from the following description of the implementation of the claimed technical solution using the drawings, which show:

Fig. 1 is a schematic diagram of a screw extractor.

The figures indicate the following positions:

1 - base, 2 - casing, 3 - rotor, 4 - bowl, 5 - solenoid valve, 6 - manifold, 7 - annular chamber, 8, 9 - overflow pipes, 10 - agitator, 11, 12 - drive, 13 - drain fitting, 14 - gasket, 15 - shaft, 16, 17 - bearing units, 18 - container.

The screw extractor consists of a base 1, a casing 2, a rotor 3 made in the form of a cylindrical extraction cup 4, a gasket 14 and a collector 6. The collector 6 is made with an annular chamber 7 with radially installed overflow tubes, respectively, 8 and 9. Rotation of the agitator 10 and The rotor 3 is provided with drives 11 and 12, respectively. The casing 2 is equipped with a drain fitting 13. The agitator 10 is attached to the hollow shaft 15, which has drain holes A. For stable operation, the rotor is equipped with two bearing assemblies 16 and 17.

Screw extractor (Fig. 1) works as follows. The liquid sample and the solvent are poured into the extraction glass 4 of the rotor 3. Then the gasket 14 is placed in the socket, the collector 6 is fixed, the drive 11 of the mixer 10 is connected due to the bearing assembly 16 and the mixer 10 is turned on. Intensive mixing occurs. The direction of rotation of the agitator is set according to the density of the solvent and the sample. When using a solvent lighter than the sample (water), the rotation of the agitator should ensure the forced supply of the solvent downwards, when using a solvent heavier than water - upwards, thereby ensuring better contact between the mixed liquids. After the extraction time has elapsed, the drive 11 is turned off, the drive 12 of the rotor 3 is turned on. The rotor 3 rotates. Under the action of centrifugal forces, the liquid mixture is divided into two liquid rings in the inner cavity of the rotor. The heavier liquid occupies the outer ring at the walls of the extraction glass 4, the lighter liquid occupies the inner ring. Under the action of centrifugal forces, the light phase passes through the gasket 14, enters the annular chamber 7, from where it merges through the overflow pipes 8 and 9 into the annular chamber of the casing 2, by gravity through the drain fitting 13 enters the container 18. At the end of the process, the engine is turned off. Further, in the container 18, after the separation of the liquids, separation occurs. During discrete processing of the sample, the solvent is fed through the hollow shaft of the stirrer 10, hole A.

The resulting extract in the container 18 is sent to subsequent operations according to the analysis methodology. Thus, the proposed design of the apparatus provides a simplification of the process of obtaining various volumes of extract in the separation process.

The screw extractor was tested on the methods of analysis of microimpurities of organic compounds on water samples.

Claims (1)

Screw extractor containing a base, a rotor consisting of a cylindrical extraction glass and a collector with overflow devices, a rotor drive and a stirrer, while the collector is equipped with an annular chamber, a gasket and radially directed drain pipes, the rotor is equipped with a casing with an annular channel and a drain fitting.

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