RU1819666C - Plate granulator - Google Patents

Abstract

Use: for granulating materials in the chemical, pharmaceutical and other industries. SUBSTANCE: bottom 2 of a dish-shaped granulator is equipped with concentric removable corrugations of 3 heights (1-10), the distance between which (10-100) m. The lower edge of the knife has a profile corresponding to the maximum corrugations. This makes it possible to increase the productivity of the granulator by an average of 20-40%. 2 s.p. f-ly, 2 ill. 1 tab.

Description

FIG. 1

The invention relates to devices for granulating materials and can be used in chemical, food, pharmaceutical and other industries.

The purpose of the invention is to increase the productivity of the granulator.

This goal is achieved in that in the known design of a disk-shaped granulator of a torus containing an inclined plate with a bead and a bottom, provided with a rotational drive, upper and lower knives installed in the plate at an acute angle to its vertical diametrical plane, while the knives are made with straight sections and the upper part of the upper knife and the lower part of the lower knife are made curved in the direction of movement of the granules, the bottom of the granulator is equipped with concentric corrugations, their height (1-10) m, and the distance between them It is within the range of (10-100) -10 m. In this case, the corrugations are made in the form of removable elements, and the lower edge of the knife has a profile corresponding to the maximum corrugations,

The installation of the corrugations on the bottom of the plate causes the product, tearing off at the top of the plate, to roll in concentric circles against the direction of rotation of the plate.

This allows the granules to move more than the prototype in a single cycle of lifting-rolling the granules, which leads to an increase in the productivity of the apparatus.

In addition, the organization of the rolling process of granules in concentric circles reduces the load on: granules when they hit the side of the plate, which reduces their destruction and, as a result, increases the productivity of the granulator.

When the corrugation height is less than m, their size becomes comparable with the diameter of the granules, which are torn off in the upper part of the plate, roll along the chord of a circle, which reduces their movement when rolling and the proportion of powder material adhering to the granules, their destruction upon impact on the side of the plate and, as a consequence of this reduces performance. ...

When the corrugation height is more than m, the process of circulation of the material in the plate is disrupted due to the disintegration of the granulated material into flows with different linear speeds along the corrugations, the rolling conditions of the granules are worsened, and, as a result, the productivity of the granulator decreases.

When the distance between the corrugations is less than m, due to the intense interaction of the granules with each other and the edges of the corrugations, the hydrodynamic conditions of rolling the material along the bottom of the plate deteriorate, which reduces the performance of the plate

granules of a torus.

With a distance between the corrugations of more than 0.1 m, the velocity of part of the granules increases so much that it leads to their rolling through the corrugations. This greatly reduces

performance of disk-shaped pellets of a torus.

In FIG. 1 shows a diagram of the proposed plate-shaped granules of a torus; FIG. 2 is a view along arrow A in FIG. 1.

The plate granulator contains an inclined plate 1, a bottom 2, which has removable corrugations 3 arranged in concentric circles of height (1-10), the distance between which i.

(10-100) -1 ohm. The bottom and sides of the plate are cleaned using the upper 4 and lower 5 knives located on the holder 6.

The granulator operates as follows. The granulator plate 1 is rotated, for example, counterclockwise by means of a drive. On the plate 1, the starting components are supplied. When rotating the plate 1 material, lifting

the sides of the plate 1 are torn off in its upper part and rolled down in a concentric path. Accumulated material is removed from the bottom and side of the plate with knives 4 and 5. The granulate is discharged through the side of the plate 1.

The laboratory setup has a plate with a diameter of 0.5 m and a side height of 0.08 m, the angle of inclination of the plate is 50 °. The length of the upper blade is 0.15 m, the length of the upper part is 0.075 m, radius

the curvature of the last Oi15 m. The lower knife with a length of 0.2 m has a rounded bottom with a radius of 0.3 m and a length of 0.1 m. The lower edge of the knives is made with recesses corresponding in shape and size to the corrugations, which

makes it possible to clean corrugations. Removable corrugations are fastened to the bottom of the plate,

Plate rotation speed 25 rpm; charge moisture 10%. Defluorinated phosphate was used as the granulated material, and phosphoric acid as the binder.

EXAMPLE 1. Install corrugation plates on the bottom of a corrugation plate with a height and a distance between them of 60-10 3 m for cleaning.

1.5 kg of defluorinated phosphate is loaded onto a plate. The supply of phosphoric acid and defluorinated phosphate is turned on, their flow rate is regulated to optimize the performance of the granulator.

Plate rotation speed 25 rpm, tilt angle 50 °.

The productivity of the granulator is determined when operating in a quasi-stationary mode by the weight output of the granules in 15.0 minutes, which in this experiment was 14.8 kg / h. Experiments 2-10 were performed similarly to experiment 1.

The results of experiments 2-10 are summarized in table.

As can be seen from the table, the supply of the bottom 2 of the plate 1 of the granulator with corrugations 3 allows, in comparison with the prototype, to increase its productivity by an average of 20-40%.

Claims (3)

1. Dish translator containing an inclined plate with a bead and a bottom, equipped with a rotation drive, upper 0 and lower knives installed in the plate at an acute angle to its vertical diametrical plane, wherein the knives are made with straight sections, and the upper part of the upper knife and the lower part of the lower knife are curved in the direction of movement of the granules, characterized in that. in order to increase productivity, the bottom of the granulator is equipped with concentric corrugations, the distance between which is within (10v3 1001-10 m, and the height of the corrugations (1-10) m. 2. The granulator according to Claim 1. characterized by the fact that the corrugations are made in the form of removable 5 elements. 3. Granulator pop. 1, characterized in that the lower edge of the knife has a profile corresponding to the maximum corrugations. In id a FIG. 2