RU2464079C1 - Continuous-action rotary mixer - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to mixers of loose materials and may be used in chemical industry, agriculture, production of construction materials, etc. Proposed mixer comprises loading and discharging devices, stationary case to house spraying nozzle made up of disk with webs arranged coaxially therewith to make intake chambers and coaxial mixing tubes communicated with intake chambers. Webs are shaped to coaxially arranged hollow truncated cones with their larger bases directed downward. Inner mixing tubes feature shape varying from cylindrical at the point of attachment of mixing tubes to ellipsoid at the edge. Note here that ellipsoid larger axis is arranged vertically.

EFFECT: good mixing, decreased sizes and power consumption.

3 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 containing dispensers, a mixing device consisting of a housing with a material discharge pipe located inside the shaft housing with blades mounted on it having windows, and a fencing element is attached to the blades in the upper part. Two drums with parallel axes are placed above the housing and there are radial elastic elements on the surface of one of them equipped with a rotary drive, and a material supply device is located between the drums and the housing [RF Patent No. 2242272].

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

Closest to the proposed invention is a continuous centrifugal mixer containing loading and unloading devices, a housing, a spray nozzle located inside the housing, consisting of a disk with baffles coaxially mounted on it, forming receiving chambers, and coaxial mixing pipes connected to the receiving chambers by radial channels . The mixing pipes are equipped with cochlein-shaped intake devices, the inner side surface of which is interfaced with the outer surface of the pipes, moreover, the pipes are perforated at the point of mating [AS No. 581979].

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

The objective of the invention is the creation of an aggregate for mixing bulk materials of a relatively simple design having high quality mixing.

The problem is achieved in that in a continuous centrifugal mixer containing loading and unloading devices, a stationary housing, a spray nozzle located inside the housing, consisting of a disk with partitions coaxially mounted on it to form the receiving chambers and coaxial mixing pipes connected to the receiving chambers , the partitions are made in the form of coaxially arranged hollow truncated cones located with a large base down, and the internal mixing pipes have a variable in chenii form - from the cylinder mounting location of the mixing tube to the ellipse at the edge, wherein the major axis is vertical.

Figure 1 shows a diagram of a continuous centrifugal mixer.

Figure 2 presents a section aa.

Figure 3 shows a view of B.

A continuous centrifugal mixer comprises a fixed housing 1, loading devices 2 and unloading 3. In the internal volume of the housing there is a spray nozzle consisting of a disk 4 on which partitions 5 and 6 are coaxially mounted, forming receiving chambers. The receiving chambers are equipped with coaxial mixing pipes 7 and 8. The spray nozzle is driven by an electric motor 9.

A continuous centrifugal mixer operates as follows.

The bulk components to be mixed are transferred from the loading device 2 to the receiving chambers of the spray nozzle. One of the receiving chambers (internal) is located in the internal volume of the partition 5 and the other (external) between the partitions 5 and 6. When the spray nozzle rotates, under the action of centrifugal forces, the particles of the mixed components move through the mixing tubes 7 and 8 and are sprayed. In this case, rarefied streams are formed, located in one plane. In the process of particle movement, mutual overlap and penetration of neighboring flows occurs, which leads to equalization of the concentration of the mixed components and the formation of a dispersed conical flow with a uniform distribution of particles over the cross section, i.e. mixing. Formed flow hits the inner surface of the housing 1, is reflected. The finished mixture is sent to the unloading device 3.

To obtain the same width of the flows at the outlet of the sprayer, the internal mixing pipes 7 have an elliptical cross-sectional shape at the edge, with the major axis of the ellipse vertical. Due to such a design of the mixing pipes 7, the formed dispersed flows of the mixed materials have practically the same shape and width, which makes it possible to ensure maximum overlap during their movement, which is necessary to obtain a homogeneous mixture. The variable cross-section of the mixing pipes 7 creates additional acceleration for the particles moving inside them, which makes it possible to increase their speed. This ensures equalization of the flow rate of the mixed materials moving in the external 8 and internal 7 mixing tubes with unequal cross-sectional areas.

In order to prevent adhesion of the material to the walls of the partitions 5 and 6 under the action of centrifugal forces, the partitions are made in the form of hollow truncated cones located with a large base down. This shape of the partitions during rotation of the spray nozzle creates a normal force moving the particles of the components into the lower part of the receiving chambers to the mixing tubes.

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

Claims (1)

A continuous centrifugal mixer comprising loading and unloading devices, a fixed casing, a spray nozzle located inside the casing, consisting of a disk with baffles coaxially mounted on it, forming receiving chambers, and coaxial mixing pipes connected to the receiving chambers, characterized in that the partitions are made in the form of coaxially located hollow truncated cones located with a large base down, and the internal mixing pipes have a cross-sectional shape - from tsili a core in the attachment point of the mixing tube to the ellipse at the edge, wherein the major axis is vertical.

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