RU2781333C1 - Reactor with multi-row agitators - Google Patents

Abstract

FIELD: chemical reactions devices.

SUBSTANCE: invention relates to capacitive-type apparatus intended for chemical reactions, as well as heat and mass transfer processes, in which it is required to create a uniform field of concentrations and temperatures in the entire volume of the stirred medium at rational power consumption. Reactor with multi-row agitators contains a vertical body with pipes for input of initial components and output of finished product, reflective elements, a rotating central shaft with agitators, which are made in the form of horizontal disks with blades, on the lower agitator the blades are installed on both sides of the disk, and on the upstream only from the top side of the discs. On the central shaft between the mixers there are additional mixers made in the form of perforated disks with triangular-shaped blades fixed on the periphery, and the connection of the additional mixers with the central shaft is movable - with the possibility of relative rotation, and the reflective elements are made in the form of hollow truncated cones, installed with large bases down, and placed coaxially to the vertical body, opposite the additional mixers.

EFFECT: invention provides high quality mixing.

1 cl, 2 dwg

Description

The invention relates to capacitive-type apparatus intended for chemical reactions, as well as heat and mass transfer processes, in which it is required to create a uniform field of concentrations and temperatures in the entire volume of the stirred medium at rational power consumption. It can be used for carrying out processes in industries that require intensive mixing of low-viscosity media.

Known reactor with multi-row mixers for processing liquid media [USSR Author's certificate No. 1666171, IPC B01F 7/16, publ. 30.07. 1991], containing a vertical housing with nozzles for input of initial components and output of the finished product, screw reflective elements, a rotating central shaft with agitators.

The disadvantages of this reactor are the insufficient quality of mixing.

Closest to the proposed invention is a reactor with multi-row mixers for processing liquid media [RF Patent No. 2572330, IPC B01F 7/16, IPC B01F 7/18, IPC B01F 7/26, publ. 01/10/2016, BI No. 1], containing a vertical housing with nozzles for input of initial components and output of the finished product, helical reflective elements, a rotating central shaft with agitators, characterized in that the agitators are made in the form of horizontal disks with milling blades, on the lower agitator milling blades are installed on both sides of the disk, the upstream mixers are made of disks in the form of rings, which are connected to the central shaft with the help of helical reflective elements, and the milling blades are installed on them only from the upper side of the disks, the outer diameter of the disk of each upstream mixer is greater than 1, 1 times the outer diameter of the disc of the nearest downstream agitator.

The disadvantages of this reactor are the insufficient quality of mixing.

The object of the present invention is to provide a reactor with in-line agitators having a high mixing quality.

This task is achieved by the proposed reactor with multi-row mixers, containing a vertical housing with nozzles for input of initial components and output of the finished product, reflective elements, a rotating central shaft with mixers, which are made in the form of horizontal disks with blades, on the lower mixer the blades are installed with both sides of the disc, and on the upstream mixers - only from the top side of the discs.

Distinctive design features of the proposed reactor with multi-row agitators is that additional agitators are placed on the central shaft between the agitators, made in the form of perforated disks with triangular-shaped blades fixed on the periphery, and the connection of additional agitators with the central shaft is movable - with the possibility of relative rotation, and reflective the elements are made in the form of hollow truncated cones, installed with large bases down, and placed coaxially to the vertical body opposite the additional mixers.

In FIG. 1 shows a diagram of a reactor with multi-row agitators.

In FIG. 2 shows view A.

The reactor with multi-row agitators, contains a vertical body 1 with nozzles for input of initial components 2 and output of the finished product 3, reflective elements 4, a rotating central shaft 5 with agitators, which are made in the form of horizontal discs 6 with blades 7, on the lower agitator the blades are mounted with both sides of the disk, and on the upstream mixers only from the upper side of the horizontal disks 6.

On the central shaft 5, between the agitators, additional agitators are placed, made in the form of perforated disks 8 with triangular blades 9 fixed on the periphery. Holes 10 are made on the perforated disks 8.

The connection of additional mixers (perforated disks 8 with triangular blades 9 fixed on the periphery) with the central shaft 5 is movable - with the possibility of relative rotation, and the reflective elements 4 are made in the form of hollow truncated cones, installed with large bases down, and placed coaxially with the vertical body 5, opposite additional agitators.

The reactor with multi-row stirrers works as follows.

The reagents enter through the pipe for introducing the initial components 2 into the internal volume of the vertical housing 1 and are intensively mixed due to the action of the rotating central shaft 5 with agitators and additional agitators. A chemical reaction takes place. The reaction products are discharged through the outlet pipe of the finished product 3.

When the central shaft 5 rotates with agitators rigidly fixed on it, which are horizontal disks 6 with blades 7, liquids (reagents) are directed in the axial and radial directions, which leads to intensive circulation of the treated medium, while ensuring its effective mixing and dispersion.

Due to the fact that the blades 7 on the lower mixer are installed on both sides of the horizontal disk 6, it is possible to prevent the formation of stagnant zones in the lower part of the housing 1.

Placement of the blades 7 in the upstream mixers only on the upper side of the horizontal discs 6 makes it possible to intensify the ascending fluid flows in the near-wall region of the housing 1.

Due to the fact that on the central shaft 5, between the mixers (horizontal disks 6 with blades 7), additional mixers are placed, made in the form of perforated disks 8 with triangular-shaped blades 9 fixed on the periphery, it is possible to intensify the mixing process by organizing mixing in the volumes between the mixers . The presence of holes 10 on the perforated disks 8 allows organizing the flow of liquids through the disks 8, which also contributes to the intensity of mixing.

The movable (with the possibility of relative rotation) connection of additional agitators (perforated disks 8 with triangular-shaped blades fixed at the periphery 9) with the central shaft 5 provides an angular velocity that is different from the agitators rigidly fixed to the central shaft 5, which can constantly change during operation. The rotation of additional agitators comes from the flow of the liquid medium inside the housing 1. This also improves the quality of mixing.

Due to the fact that the reflective elements 4 are made in the form of hollow truncated cones, installed with large bases down, and placed coaxially with the vertical body 5, opposite the additional mixers, the liquid flows thrown onto them are reflected and directed to the zones of the rotating mixers (horizontal disks 6 with blades 7 ). Here, multiple intensive crushing and merging of flows takes place, which improves the quality of mixing.

The proposed design of the reactor with multi-row mixers ensures high quality mixing.

Claims (1)

A reactor with multi-row agitators, containing a vertical casing with nozzles for input of initial components and output of the finished product, reflective elements, a rotating central shaft with agitators, which are made in the form of horizontal disks with blades, on the lower agitator the blades are installed on both sides of the disk, and on the upstream mixers only from the upper side of the disks, characterized in that on the central shaft between the mixers there are additional mixers made in the form of perforated disks with triangular-shaped blades fixed on the periphery, and the connection of the additional mixers with the central shaft is movable - with the possibility of relative rotation, and the reflective elements made in the form of hollow truncated cones, installed with large bases down, and placed coaxially with the vertical body opposite the additional mixers.

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