SU1678430A1 - Mixing device - Google Patents

Abstract

The invention relates to devices for mixing liquids. The purpose of the invention is to increase the efficiency and uniformity of mixing. The device contains vibrators mounted on the periphery of the cylindrical apparatus in several rows. In each row, the vibrators have the same orientation and opposite to the adjacent row. The axis of each vibrator is with a horizontal plane passing through its base, the angle is 9- 30-60 °, and the angle of rotation of the vibrator relative to its axis to the horizontal plane is an angle of 30 °. The vibrators in each row and between the rows are electrically connected to the oscillator with the possibility of their inclusion in the opposite phase. 1 hp f-ly, 2 ill.

Description

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The invention relates to mixing devices and can be used in the chemical, metallurgical, pharmaceutical, microbiological industries, where thorough mixing is required, but without the traumatic effect of mixing bodies on the mixed medium.

The purpose of the invention is to increase the operating efficiency and uniformity of mixing by creating directed vortex flows throughout the whole working volume of the apparatus.

Figure 1 shows the device, a vertical section; figure 2 is also horizontal section.

The mixing device consists of a cylindrical apparatus 1, on the periphery of which vibrators 2 are installed, Vibrators 2 have organs of directional oscillations 3 and are installed on apparatus 1 in four rows. Four vibrators are installed in each row of the device. The directional oscillating body 3 is a conical socket, ending with a membrane 4. With its smaller base opposite to the membrane 4, the socket is attached to the body of the vibrator. The membrane 4 is installed in the socket with the possibility of transmitting vibrations to adjacent layers of the mixture with the subsequent spreading further by the expanding beam, the taper of which corresponds to the taper of the socket. Those. the shape of the socket forms the shape of the spreading beam.

The mixing device operates as follows.

A mixture of substances that needs to be moved is poured into apparatus 1. This may be a single phase mixture consisting of several difficult-to-mix liquids or solutions, as well as multi-phase, including, in addition to a liquid, solid components for the creation of a suspension, a solution

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about

neither solid components in a liquid, extraction of substances from a solid phase into a liquid, purification of solids in a liquid phase, etc.

After the volume of the apparatus 1 is filled with the substances to be mixed, the vibrators 2 are turned on and the actual process of mixing or washing is carried out. The efficiency of the mixing process is achieved by the intensity of the directed flows, which evenly throughout the entire volume of the apparatus 1 create a turbulent mode of hydrodynamics,

Indeed, the upper row of vibrators 2 creates a rotational movement of the mixture in the upper zone of the housing 1. In this case, since the adjacent vibrators 2 operate in antiphase, conditions are created for the intensive penetration of one fluid flow into another. At the same time, the movement of the flows remains directional, does not turn into chaotic movement, therefore, the hydrodynamic situation in the upper zone of the housing 1 is ensured uniformity.

Following the upper row of vibrators creates a rotational motion of the fluid in the opposite direction. The mixing conditions in this part of the apparatus are the same as in the upper part, therefore, the hydrodynamic conditions are the same. The rotational movement of the fluid layers in different directions and the installation of vibrators relative to the axis at an angle a in the horizontal plane creates a mixing motion in the volume of the entire apparatus. Again, this flow of movement remains directional, not becoming chaotic. Its intensity is easily controlled by changing the inclination of the vibrator. In this way, the ratio of the intensity of the streams is adjusted to the optimum value. Mixing the remaining liquid layers is carried out in a similar way, i.e. In the whole working volume of the apparatus, the same hydrodynamic environment is created, which determines intensive uniform mixing.

1 The angle {$ - the angle of inclination of the vibrators is 30 ... 60 ° and is formed by the axis of the vibrators and the horizontal plane passing through its base, and is chosen from the conditions for the exclusion of counter-currents of vibrations emitted by the vibrators,

Angle a is the angle of rotation of the vibrator in a horizontal plane about the axis and is 30 ° and provides a vortex flow in the center of the working space enclosed between the vibrators.

Angles a and D range of their changes is selected from the following considerations. Reducing the angle to less than 30 ° reduces the treatment area. Angle over 60 ° covers

the treatment area with overlap, and its increase does not make sense (since in the area of the overlap there will be an overlap of vibrations, which will reduce the relative shift of the mixed particles).

0 It should be noted that at angles a less than 30 °, the mixing efficiency begins to drop sharply, abruptly. This is due to the fact that at angles "less than 30 °, the flows from the vibrators begin to be

5 directed at each other and oriented, directed mixing begins to turn into uncontrollable, chaotic,

Mixing efficiency also

0 falls at angles greater than 60 °, but for a different reason. In this case, the zone appears and rapidly grows with an increase in the angle, while the central zone is not washed by streams from vibrators with a reduced intensity of mixing5.

In the vertical plane, when the angle of inclination of the bell of the vibrator is changed up or down by an angle greater / 30 °, the mixing intensity also decreases. The reason

A drop in the mixing intensity is also the occurrence of oncoming flows and, as a result, randomness of movement.

Performing angles / 3 within the proposed limits will ensure maximum effect.

5 mixing process.

Thus, the proposed design of the device, while respecting the described arrangement of vibrators in the apparatus, provides an intense, uniform

0 mixing the mixture throughout the working volume of the apparatus.

Claims (2)

1. A device for mixing, containing vibrators mounted along the periphery of the cylindrical apparatus in several rows, made in the form of bodies and organs of directional oscillations, characterized in that, in order to increase 0 efficiency and uniformity of mixing by creating directed vortex flows throughout the working volume, the vibrators of each row have the same orientation of the organs of directional oscillations and opposite to the adjacent row, and the axis of each vibrator is with the horizontal plane passing through its base, angle / 30. 60 °. and the angle of rotation of the vibrator relative to its axis of the horizontal plane is 30 °. 2. The device is pop.1, which differs from the fact that the adjacent vibrators in each. four GUN / i Y tfr & FIG. I A / g 2 The house row and between the rows are electrically connected to the oscillator with the possibility of their inclusion in the opposite phase. about /