SU439299A1 - Centrifugal Extractor - Google Patents

Description

one

The invention relates to the construction of centrifugal extractors and can be used in solvent extraction processes.

According to the main author. St. 280437 a centrifugal extractor is known, comprising a housing, partitions, forming mixing and sludge chambers, a rotor with apertures on the periphery and a mixing device.

The disadvantage of this apparatus is that it can work only in the absence of resistances in the lines of transportation of the phases. When operating extractors in a multistage countercurrent cascade, as well as for transferring phases from the extractor to backpressure systems, it is necessary to install additional conveying organs between the extractors and at the ends of the cascade (for example, pumps) or equip the extractors with suction devices (for example, screw nozzles in conveying cones).

In order to intensify the extraction process, the proposed extractor is equipped with annular visors installed along the rotor perimeter above the outlets of the phases and tangentially located phase outlets.

Such a device creates in the output nozzles the speed of movement of the phases corresponding to the speed of rotation of the rotor and the diameter of the visors and thus provides the pressure necessary to transport the phases between the extractors in the countercurrent cascade and transfer them to the lines and devices with backpressure.

FIG. 1 depicts the proposed extractor; in fig. 2 is a section along A-A in FIG. one; in fig. 3-section along BB in FIG. one.

The centrifugal extractor consists of body 1, rod meter 2, conveying cone 3, separation chamber 4 and light collectors of light 5 and heavy 6 phases with output tangentially arranged nozzles 7 and 8. In the extractor reactor there are openings 9 for the easy phase to exit, flow openings 10, an overflow threshold 11 and apertures 12 for the exit of the heavy phase. Above holes 9 and 12 around the perimeter

the rotor is installed annular visors 13 and 14, with the height of the peaks more than the diameter of the holes.

The extractor works in the following way. The heavy and light phases through the tee are directed to the housing 1, where they are intensively mixed with the help of the broom 2. The resulting emulsion is transported by a cone 3 into the separation chamber 4, where under the action of a centrifugal field it is divided into a light and

heavy phase. Light phase is thrown away.

through the holes 9 on the visor 13, accelerates due to friction on its lower surface and goes to the annular collector 5, forming in it a continuous rotating liquid ring. The heavy phase passes through the overflow holes 10 located in the gaps between the holes 9, overflows through the threshold 11, is ejected through the holes 12 on the peak 14, accelerates due to friction on its lower surface and goes to the ring collector 6, where a continuous rotating liquid ring is formed. Peaks 13 and 14, located in the cavities of collections 5 and 6, accelerate the phases contained in them to a speed corresponding to the speed of rotation of the rotor and the diameter of the peaks. Outlets 7 and 8 are made tangentially and directed towards

rotation of the rotor, therefore, they create the same speed of movement of the phases as the circumferential speed of the liquid rings in collections 5 and 6, and the necessary hydrodynamic head. The change in resistance in the phase transport lines is automatically compensated by the change in thickness of the liquid rings in collections 5 and 6.

Subject invention

Centrifugal extractor autom. St. 280437, characterized in that, in order to intensify the extraction process, it is provided with annular visors installed along the rotor perimeter above the phase exit openings and tangentially located phase transfer nozzles.

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FIG. 2