SU1204224A1 - Centrifugal extractor - Google Patents

Description

The invention relates to centrifugal apparatus designs and can be used in solvent extraction processes.

The aim of the invention is to intensify the process of mass transfer and simplify the manufacturing technology.

FIG. 1 schematically shows an apparatus, a longitudinal section; in fig. 2 is a section A-A in FIG. one; in fig. 3 and 4 are embodiments of the slits.

The centrifugal extractor consists of a rotor 1 (Fig. 1), an upper disk 2, as well as a chamber 3 for collecting heavy and a chamber 4 for collecting light phases, an input and output device for phases in the form of stationary tubes 5 and 6 for diverting respectively heavy and light liquids, coaxially arranged pipes 7 and 8 for injecting liquids, lower disk 9 with radial channels 10 for supplying light phase to the working area of the apparatus, dispersing device 11. The working space of the rotor is filled with nozzles in the form of coaxially arranged rings 12 with a slit 13, installed without gaps relative to each other, on which there may be triangular 14 (Fig. 4) or rectangular 15 (Fig. 5) canopies. In the case of working with viscous liquids, the canopies are made either perforated or with a serrated edge. In the upper disk there are holes 16, 17.

The device works as follows.

After the rotor has reached the required number of revolutions, the supply of liquids to the apparatus begins. In this case, the hard phase through the fixed pipe 7 enters the dispersing device 11, from where it is ejected into the contact zone under the action of centrifugal force. Twi

Along the slits 13 of the first from the center of the ring, the drops reach its periphery. Then they fall off the edges of the slots of the first ring and pass into the slots of the second along the ring, the drops being crushed, hitting the surface of the slot wall, and the process is repeated in the slots of the subsequent rings. When working with viscous liquids, when there are not enough forces to crush the droplets when moving them from one slot to another, in order to enhance the renewal of the contact surface of the phases, triangular (Fig. 4) and rectangular (Fig. 5) canopies are provided. This leads to a forced fusion of droplets into the layer of the heavy phase in front of the visor, followed by its dispersion upon passing into the next slot and crushing. Thus, multiple fusion, dispersion and crushing of the heavy phase occur, contributing to more intensive renewal.

0 interfacial surface, and consequently, more efficient mass transfer.

Having reached the surface level of the phase separation, located on the radius of the light phase inlet into the contact zone of the apparatus, the heavy phase drops coalesce in the form of

5, the continuous flow moves to the periphery of the rotor, from where it passes through the openings 16 in the upper disc 2 into the chamber 3 and further along the tube 5 is removed from the apparatus.

The light phase through the fixed pipe 8 and the radial channels 10 under the action of the centrifugal pressure developed in them enters the contact zone of the apparatus near the phase separation level and moves countercurrently to the heavy phase from the periphery to the center through the slots 13 of the coaxially arranged rings 12, then through the hole 17 m disk 2 and through the tube 6 is removed from the apparatus

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Claims (1)

A CENTRIFUGAL EXTRACTOR, comprising a housing, a rotor with nozzle elements having channels, and phase input and output devices, characterized in that, in order to intensify the mass transfer process and simplify the manufacturing technology, nozzle elements are made in the form of coaxially arranged rings with straight cuts installed without clearances relative to each other. T.F. L.F. fig i