RU2553865C2 - Centrifugal mixer of loose materials - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention is designed for use in chemical industry, agroindustrial complex, production of construction materials and other industries. A centrifugal mixer of loose materials comprises batches, a discharge device, a fixed body, in the inner volume of which there is a driven spray nozzle arranged, comprising coaxial chambers, each of which is equipped with radial channels. Radial channels have in their cross section rectangular shape and are separated by a vertical partition, in the central part of the body, in the zone of full overlapping of mixed materials particles flows and coaxially to the spray nozzle there is a receiving device connected to the body and consisting of a set of congruous guiding elements, besides, distanced between guiding elements are made as alternating and rising at both sides from the horizontal axis of radial channels, and the discharge device representing a circular reservoir is placed under the receiving device in the lower part of the body.

EFFECT: invention provides for creation of a centrifugal mixer of loose materials of comparatively simple design, having high quality of mixing.

4 dwg

Description

The present invention is intended for use in the chemical industry, agriculture, the production of building materials and other industries.

A known unit for mixing bulk materials [RF Patent No. 2449829]. The unit contains dispensers associated with the dispensers of the loading device, the unloading device, a stationary housing. A conical baffle element and a drive hollow shaft with a conical nozzle and a conical chamber equipped with spray channels alternating in its circumferential direction are located in the housing.

The disadvantages of this device include the complexity of the design and the low quality of mixing.

Closest to the proposed invention is a continuous centrifugal mixer [RF Patent No. 2464079].

The mixer contains dispensers, an unloading device, a fixed housing, in the internal volume of which a drive spray nozzle is installed, consisting of coaxial chambers, each of which is equipped with radial coaxial channels. The internal channels have a variable shape in cross section - from the cylinder at the attachment point to the ellipse at the edge.

The disadvantages of this device include the complexity of the design and the low quality of mixing caused by the separation of the mixture during the selection process (when it hits the wall of the body and moves to the discharge device).

The objective of the invention is the creation of a centrifugal mixer of bulk materials of a relatively simple design having high quality mixing.

The problem is achieved in that in a centrifugal mixer of bulk materials containing dispensers, an unloading device, a fixed housing, in the internal volume of which a drive spray nozzle is installed, having coaxial chambers, each of which is equipped with radial channels, the radial channels are rectangular in cross section and divided a vertical partition, in the central part of the housing, in the area of complete overlap of the particle flows of the mixed materials and the coaxial spray nozzle, is placed a receiving device that is single to the housing, consisting of a set of congruent guide elements, and the distances between the guiding elements are made variable and increasing on both sides of the horizontal axis of the radial channels, and the discharge device, which is an annular container, is located under the receiving device in the lower part of the housing.

In FIG. 1 shows a diagram of a centrifugal mixer of bulk materials.

In FIG. 2 shows a section aa.

In FIG. 3 shows a top view.

In FIG. 4 shows the placement of congruent guide elements (the axial line shows the horizontal axis of the radial channels).

The centrifugal mixer of bulk materials contains a stationary housing 1, dispensers 2. In the internal volume of the housing there is a drive spray nozzle 3 consisting of coaxial chambers. Each coaxial chamber is provided with radial channels 4 and 5. In the central part of the housing 1 there is a receiving device 7, consisting of a set of congruent guide elements 8. Under the receiving device there is a discharge device 9.

A centrifugal mixer of bulk materials works as follows.

The bulk components to be mixed come from the dispensers 2 into the coaxial chambers of the spray nozzle 3. When the nozzle rotates under the action of centrifugal forces, the mixed materials enter the radial channels 4 and 5, move along them and are sprayed. This organization of movement provides separate spraying of the mixed materials.

Due to the fact that the radial channels are rectangular in cross section and are separated by a vertical partition, the dispersed streams obtained at the output have the same width and close opening angles, which is necessary to obtain a homogeneous mixture.

When moving behind the nozzle in rarefied flows, the flow of particles of one of the materials into the other penetrates. At some distance from the nozzle, there will be a complete overlap of the flows. In this zone, almost the same ratio of the concentrations of particles of mixed materials over the flow cross section is observed. Further, with increasing distance from the nozzle, the complete overlap is violated.

In the area of complete overlapping of flows, a receiving device 7 is installed, which ensures the selection of the mixture and its movement without separation into the unloading device 9. The principle of operation of the receiving device is based on shockless layer-by-layer selection of the formed mixture and separate movement of the selected portions to the unloading device.

Due to the fact that the concentration of particles in the flow cross section is unevenly distributed, to prevent separation of the prepared mixture, the receiving device is made of a set of congruent guide elements. The distances between the guide elements are made variable and increasing, that is, the distance between adjacent guide elements increases in both directions (up and down) with distance from the horizontal axis of the radial channels.

The unloading device is an annular container located under the receiving device in the lower part of the housing, which allows collection of the mixture from the receiving device.

The proposed centrifugal mixer of bulk materials allows for low energy consumption and relatively small dimensions to ensure good mixing of bulk media.

Claims (1)

A centrifugal mixer of bulk materials containing dispensers, an unloading device, a fixed housing, in the internal volume of which there is a drive spray nozzle having coaxial chambers, each of which is equipped with radial channels, characterized in that the radial channels are rectangular in cross section and are separated by a vertical partition, in the central part of the housing, in the zone of complete overlapping of the flows of particles of the mixed materials and the coaxial spray nozzle, placed connected to the housing receiving device, consisting of a set of congruent guide elements, the distances between the guide elements being variable and increasing on both sides of the horizontal axis of the radial channels, and the discharge device, which is an annular container, is located under the receiver in the lower part of the housing.

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