RU2038112C1 - Rotor-disk extractor - Google Patents

Abstract

FIELD: chemical mechanical engineering. SUBSTANCE: extractor has cylindrical housing sectioned by stator rings, shaft with dispersing disks, and connecting pipes for supplying and discharging light and heavy phases. Dispersing disks are constructed as stacks each of which has at least one corrugated plate and disk defining a chamber wherein dispersing members are housed. The corrugated plate, disk, and periphery wall of the stack are perforated. EFFECT: enhanced efficiency. 4 dwg

Description

 The invention relates to chemical engineering, namely to rotary-disk mass transfer apparatuses that are used in the chemical, petrochemical, pharmaceutical and other industries.

 To intensify the process of mass transfer, various designs of extractors are used.

 A known apparatus equipped with rotating dispersing disks [1] The intensification of the process in this case is achieved by increasing the degree of turbulization of the light and heavy phases of the dispersing disks.

Closest to the invention is a rotary disk extractor containing a cylindrical body with stator elements and fittings for input and output of light and heavy phases [2]
However, this extractor has significant longitudinal mixing, an underdeveloped phase contact surface, which impairs mass transfer and causes additional energy consumption.

 The aim of the invention is to intensify the process of mass transfer by increasing the interfacial surface and reducing the intensity of longitudinal mixing.

 For this, in a rotary disk extractor, including a housing with stator rings, a shaft with dispersing disks and a fitting for input and output of light and heavy phases, the dispersing disks are made in the form of packets, each of which contains at least one corrugated plate and a disk forming a turbulizing chamber in which dispersing elements are installed, wherein the corrugated plate, the disk and the peripheral wall of the bag are perforated.

 In FIG. 1 shows a rotary disk extractor; figure 2 section aa in figure 1; figure 3 section BB in figure 2; figure 4 section bb in figure 3.

 The rotary disk extractor consists of a vertical cylindrical body 1, partitioned by stator rings 2, an axially mounted shaft 3 with packages 4, fittings for input 5, 6 and output 7, 8 of light and heavy phases, respectively. From above and below, the settling zones 9 and 10 for light and heavy phases are respectively fenced with perforated partitions.

 Package 4 consists of a corrugated plate 12, a disk 13, a turbulent chamber 14, dispersing elements 15, and a peripheral wall 16.

 Rotary disk extractor operates as follows.

 The shaft on which the packages are fixed is rotated. The light phase is fed into the rotary disk extractor through the nozzle 5 and rises countercurrent to the heavy phase due to the difference in density. The light and heavy phases after passing all the working sections of the extractor through the partitions fall into the settling zones 9 and 10, respectively. Partitions contribute to the localization of intense movement of flows within the settling zones. The heavy and light phases through the nozzles 7 and 8 are removed from the apparatus.

 In each working section, both phases are introduced into package 4: the light phase through the perforation of the corrugated plate 12, and the heavy phase through the perforation of the disk 13. In this package, the light and heavy phases are crushed by dispersing elements 15. Along with the effect of phase crushing in the package, a repeatedly repeated process occurs merging droplets dispersing particles of light and heavy phases, which leads to an increase in the interfacial surface and significantly increases the mass transfer efficiency.

 Under the action of centrifugal forces, the heavy phase is ejected from the bag mainly through the peripheral wall 16 of the bag 4, and the light phase occurs through the central part of the bag, which significantly reduces longitudinal mixing in the extractor and increases the driving force of the extraction process. Moreover, the centrifugal force, depending on the rotation frequency of the packet and the radius of curvature of the corrugations, acts on the heavy phase in the packet. The corrugated structure of the package helps to increase the retention capacity of the package in the dispersing phase and additional dispersion of the latter. A decrease in the intensity of longitudinal mixing leads to an increase in the degree of mass transfer.

 The present invention allows to significantly intensify the process of mass transfer by reducing the degree of longitudinal mixing and increasing the interfacial surface while reducing the cost of energy for mixing.

 The possibility of carrying out the extraction process in the device of the proposed design was subjected to model tests of the desquenolation of channel water at an experimental bench. The diameter of the outer shell is 440 mm, the distance between the stator rings is 80 mm, the diameter of the corrugated bag is 250 mm, and the height of the turbulizing chamber is 30 mm. Rotational speed 440-570 rpm. This design provides an increase in the degree of extraction of 1.47 times with a decrease in torque by 26% compared with the model of the known extractor.

Claims (1)

 ROTARY DISK EXTRACTOR, comprising a cylindrical housing with stator rings, a shaft with dispersing disks and a fitting for input and output light and heavy phases, characterized in that the dispersing disks are made in the form of packets, each of which contains at least one corrugated plate and disk forming a turbulizing chamber in which dispersing elements are installed, while the corrugated plate, the disk and the peripheral wall of the bag are perforated.

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