RU153763U1 - DISPERSANT MIXER - Google Patents

Abstract

A mixer-disperser containing a vertical cylindrical body, an elliptical cover and a bottom, an agitator, a vertical shaft with a rotor placed on it, on the basis of which a hollow thin-walled truncated cone with bypass windows is concentrically mounted, connected to it from below by a smaller base, and above the cone on the shaft is mounted an axial diffuser made in the form of four blades located at an angle of 60° to the horizontal plane, and the base of the rotor is made in the form of a disk on which a hollow cone is concentrically mounted, with its apex upwards, characterized in that the bottom is equipped with a discharge pipe made of bimetal, moreover, the bimetal material on the outer side of the discharge pipe has a thermal conductivity coefficient 2.0-2.5 times higher than the thermal conductivity coefficient of the material on the inner side.

Description

IPC B01F 5/22

DISPERSANT MIXER

The utility model relates to batch devices for the preparation and simultaneous grinding of components of a mixture of bulk materials, can be used in food, chemical and other industries.

Known centrifugal mixer-dispersant (see RF patent No. 2311951, IPC B01F 7/26, B28C5 / 16, publ. 10.12.2007, Bull. No. 34), containing a vertical cylindrical body, an elliptical cover and bottom, a vertical shaft mounted on a rotor in the form of a disk on which a hollow thin-walled truncated truncated cone with overflow windows is concentrically mounted, guide vanes having a circular arc profile are spiral-mounted on the inner surface of the cone, and overflow holes are made along the entire length of the guide vanes in the lower part, and top - notch having a rectangular shape.

The disadvantage of this centrifugal mixer is the presence of stagnant zones in the central part of the rotor and insufficient dispersing ability, which affects the efficiency of mixing and dispersion processes.

Known mixer-dispersant (see RF patent No. 104867 IPC B01F 5/22, publ. 05/27/2011, Bull. No. 15) containing a vertical cylindrical body, elliptical cover and bottom, agitator, vertical shaft with a rotor placed on it, on at the base of which a hollow thin-walled truncated cone with overflow windows is connected concentrically, connected to it from below by a smaller base, an axial diffuser is installed on the shaft above the cone, made in the form of four blades located at an angle of 60 ° to the horizontal plane, and the rotor base is made in in the form of a disk on which a hollow cone concentrically mounted facing upward.

The disadvantage is the reduction in the quality of the finished product, especially during prolonged use due to its sticking to the inner surface of the discharge pipe located in the bottom, which leads to subsequent coagulation and enlargement of the crushed mixture.

The technical task of the proposed utility model is to maintain the quality of the finished product during long-term operation by eliminating the sticking process and, accordingly, coagulation and subsequent enlargement of the particles of the granular mass.

The technical result of maintaining the quality of the finished product at the outlet during long-term operation is achieved by the fact that the mixer-disperser contains a vertical cylindrical body, an elliptical cover and a bottom, a tedder, a vertical shaft with a rotor placed on it, on the basis of which a hollow thin-walled truncated truncated cone with bypass windows, connected to it from below by a smaller base, and above the cone on the shaft there is an axial diffuser made in the form of four blades located At an angle of 60 ° to the horizontal plane, and the base of the rotor is made in the form of a disk on which a hollow cone is concentrically mounted, facing upward, the bottom is equipped with a discharge pipe made of bimetal, and the material of the bimetal on the outside of the discharge pipe has a thermal conductivity of 2.0-2.5 times higher than the coefficient of thermal conductivity of the material from the inside.

Figure 1 shows in section a General view of a centrifugal mixer of periodic action; figure 2 shows the axial diffuser; figure 3 - discharge pipe from bimetal. The mixer consists of the following elements: a vertical cylindrical body 1, an elliptical cover 2, on which there is a loading nozzle 3, an elliptical bottom 4, with a bearing assembly 5, in which the shaft 6 is fixed. An agitator 7 is installed in the lower part of the shaft 6, made in the form of two guide vanes. A rotor is mounted on the shaft 6, the base of which is made in the form of a disk 8, on which the hollow cone 9 is turned concentrically, facing upward. A hollow thin-walled truncated cone 10 with bypass windows 11 is connected concentrically to the rotor base and is connected to the disk from below by a smaller base. Above the cone on the shaft, an axial diffuser 12 is concentrically mounted, made in the form of four blades located at an angle of 60 ° to the horizontal plane. An unloading pipe 13 is installed in the elliptical bottom.

In this case, the discharge pipe 13 is made of bimetal 14, and the material 15 of bimetal 14 on the outside 16 has a thermal conductivity coefficient of 2.0-2.5 times higher (for example, aluminum with a thermal conductivity of 204 W / (m · g), see p. 312. Nashchokin VV Technical thermodynamics and heat transfer. M: 1980. - 369 s., ill.) than the thermal conductivity of the material 17 (brass with a thermal conductivity of 85 W / (m · g), see also ) on the inside 18.

The mixer is as follows. Bulk materials are fed through a pipe to an axial diffuser 12, which splits the material flow into several parts and grinds large conglomerates from material particles. After this, the material flows to the base of the rotating rotor, in the form of a disk 8. Under the action of centrifugal force, the bulk material uniformly "spreads" along the conical base from the center to the periphery. The presence of the cone 9 at the base of the rotor allows you to get rid of stagnant zones in the center of the base of the rotor and contributes to a more uniform distribution of granular mass along the base of the rotor. Most of the material goes to the inner surface of the hollow truncated cone 10, where it is divided into several streams. Part of the granular mass reaches the upper edge of the rotor. The total annular material flow descends from the surface of the cone at different points in time, being divided into several parts, which, subsequently, intersect each other in the annular space between the rotor and the mixer body. Partially the material flows out of the cone through the bypass windows 11. Under the action of the sharp blades of the agitator 7, the material is dispersed, partially rises from the elliptical bottom 4 and falls back to the base of the rotor. The finished mixture is poured onto the elliptical bottom 4 and is discharged from the apparatus through the discharge pipe 13. Due to the distribution of the flow of bulk material under the action of the blades of the axial diffuser 12, as well as the reduction of stagnant zones due to the presence of a cone 9 facing up on the rotor base, the intensity and efficiency increase mixing and dispersing processes and, as a result, the quality of the mixture increases.

In the process of withdrawal of the finished mixture through the discharge pipe 13, sticking of individual particles to the inner side 18 is observed, which coagulate and coarsen with the movement of the granular mass. At the same time, the granularity of bulk material comes with a deterioration in the quality of the finished product. The implementation of the discharge pipe 13 of bimetal 14 with the location of the material on the outside having a thermal conductivity coefficient of 2.0-2.5 times higher than the coefficient of thermal conductivity of the material on the inside, leads to the fact that under the action of the centrifugal force of the rotating rotor, the bulk material is swirled with air, which thermodynamically exfoliates into “hot” peripheral and “cold” axial layers (see, for example, Merkulov VP The vortex effect and its application in technology. Samara. 2002. - 286 pp., ill.). As a result, the inner surface of the elliptical bottom 4, and accordingly, the inner side 18 of the discharge pipe 13 are heated. Moreover, the inner side 18 of the discharge pipe 13 has a temperature higher than the temperature of its outer side 16. In the presence of different temperature gradients of the bimetal 14, thermal vibration of the discharge pipe 13 is observed (see, for example, Dmitriev L.N. Bimetals. Perm. 1991. - 415 p.: Ill.), Which eliminates the sticking of particles of the finished product to the inner side 18 of the discharge pipe 13.

The originality of the proposed utility model is to ensure the conclusion of a high-quality finished product by eliminating sticking and its subsequent clumping when moving from the elliptical bottom along the discharge pipe.

Claims (1)

A dispersant mixer comprising a vertical cylindrical body, an elliptical cover and a bottom, an agitator, a vertical shaft with a rotor placed on it, on the basis of which a hollow thin-walled truncated truncated cone with bypass windows is installed, connected to it from below by a smaller base, and mounted above the cone on the shaft axial diffuser made in the form of four blades located at an angle of 60 ° to the horizontal plane, and the base of the rotor is made in the form of a disk on which the floors are concentrically mounted th cone facing upward, characterized in that the bottom is equipped with a discharge pipe made of bimetal, and the bimetal material on the outside of the discharge pipe has a thermal conductivity coefficient of 2.0-2.5 times higher than the thermal conductivity coefficient of the material on the inside.

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