SU1161173A1 - Granulator for paste-like materials - Google Patents

Abstract

GRANULATOR FOR PASTE MATERIALS, containing a chamber, a bottom with filter holes, having the form of two half-cylinders, and parallel rolls installed in the chamber with hollows and ridges, made in the form of solid longitudinal crests with an involute lateral surface, the outer diameter of which is equal to the diameter of the cylindrical part of the bottom, and the width is equal to the width of the valleys associated with the rotational drive, which is also distinguished by the fact that, in order to improve the quality of the granules, the rolls are made with annular grooves, and the granulator has p. Splices fixed on the bottom, placed in the grooves of the rolls and dividing the chamber into sections, horizontally installed in the upper part of the body with powering cams and baffles fixed on the inner side surface of the body parallel to the side of the rolls.

Description

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J 11

The invention relates to devices for the granulation of pasty materials and can be used in the chemical, petrochemical and other industries.

A device for granulating materials is known, comprising a chamber with a vertical loading neck and a perforated bottom, which is made in the form of two half-cylinders, and parallel rolls mounted close to each other, kinematically connected to a rotational drive, with ridges forming extruders, and depressions located on the roll alternately with protrusions. In this device, the protrusions are separated by a distance of 5 hollows and the protrusions are alternately arranged along the roll. The shape and size of the depression does not correspond to the shape and size of the protrusion, which excludes the obtrusion by its protrusion; there is a gap CO between the projection and the depression.

A disadvantage of the known device is the uneven exit of the harnesses from the holes of the die and, as a result, the variability of the obtained granules.

A device for granulating materials is known, comprising a chamber with a perforated grid and parallel rollers having protrusions and troughs and coupled to a rotary drive. The surface of the protrusion of one roll is adjacent to the surface of the depression of the other roll. The bottom of the chamber is made in the form of two semi-cylinders located close to the ridges of both rolls, with the surface of the protrusion of one roll adjacent to the bottom of the other roll, and the perforated grille is located in the bottom of the chamber between the roll axes. Famous Ustust 23. Just by design

However, this device does not ensure uniformity of the product bundles exit from the spinneret openings due to the lack of the process of pre-compaction of the initial charge and its uniform supply along the length of the forming rolls, because the product moves in a plane parallel to the longitudinal axis of the rolls (from the high pressure zone).

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The purpose of the invention is to improve the quality of the granules.

The above objective is achieved by the fact that in a granulator containing a bottom with spunbins, having the form of two semi-cylinders, parallel rolls with depressions and protrusions in the chamber are made in the form of solid longitudinal ridges with an involute lateral surface whose outer diameter is equal to a cylindrical diameter portions of the bottom, and the width is equal to the width of the valleys associated with the rotational drive, the rolls are made with annular grooves, and the granulator is equipped with ribs attached to the bottom i placed in the grooves

rolls and separating the chamber into sections horizontally mounted in the upper part of the body by feeding cams and dampers fixed to the inner side surface of the body parallel to the ridges of the rolls.

Thanks to the fact that the camera is equipped with powering cams and

The initial charge without baffles. The BOT completely fills the volumes of the roll hollows and is pre-compacted by cams in this volume bounded by the cylindrical surface of the baffle and the surface of the roll hollow, while evenly distributed over the length of the hollow. The ribs that enter the grooves of the rolls and are installed in the bottom of the chamber, cut the mass compacted in the rolls cavities into a number of parts equal to the number of holes in the draw plate, for each pressing cycle, pushing through any hole in the nozzle is the same as the product. Due to this, the granules obtained after cutting the harnesses with a knife device have the same length.

Mass is pushed through a die in the granulator by cycling; therefore, to ensure a straight cut of the ends of the bundles, cutting the granule with a knife device is performed at the time of the idle rolls (i.e. at the time of the extruded extrusion process), when the assa is enclosed in the volume between one protrusion the roll, the cavity bottom and the bottom of the chamber, all pressed through the holes of the spinneret, and the pressure in the molding zone is still not enough to extrude the next portion of the product.

As a result, high-quality granules of the correct, equi-dimensional, schistric or needle shape are obtained.

Figure 1 shows the pronged granulator, transverse section; figure 2 - section aa in figure 1.

The granulator consists of chamber 1, which is made in the form of a chamber (trough) the bottom of which has the shape of two semi-cylinders, parallel rolls 2 and 3, horizontally installed inside the chamber and provided with longitudinal ridges 4, feeding cams 5 and 6 parallel to each other and. horizontally mounted in the upper part of the chamber, the bump stops 7 and 8, the filler y 9 located in the bottom of the chamber, behind the loading chute 10, fixed ribs 11 fixed to the bottom of the chamber and entering the grooves of the rolls 12 and the knife device 13. Edges the shaping zone is divided into sections 14 having the same volume, the number of which is equal to or equal to the number of holes in the die.

The ridges are evenly distributed over the roll surface and form protrusions and depressions on it. The cylindrical surface of the ridges, wallpaper rolls adjacent to the bottom of the chamber and to the cylindrical surface of the bumpers, and the surface of the protrusion of one roll to the surface of the hollow of the other. The rolls outside of the working chamber by means of the same gears 15 and 16 and the cam clutch 17 are kinematically connected with each other and with a rotational drive (not shown in the drawing). The feed cams are driven in rotation by means of 2 gear pairs 18. All of the granulator assemblies are mounted on a common frame.

Pellet torus works as follows.

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Formed mass is loaded into the chamber 1 through the chute 10.

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The drinking cams 5 and 6, rotating towards each other, capture the mass and compact it in the volume bounded by the cylindrical 5 surface of the baffle 7 and the bottom surface of one of the rolls 2. The rolls 2 and 3 rotate at the same speed in opposite directions towards the adjacent walls

10 cameras. Sealed in a closed

volume (between the surface of the bump and the surface of the depression of one of the rolls), the mass moves along the cylindrical surface of the bump

15 and the bottom of the chamber with one of the ridges 4 of the roll 2 and is cut by the ribs 11 installed in the bottom of the chamber and the inlet. in roll grooves into equal parts by volume, the number of which

20 pairs or equal to the number of holes

dies 9. The captured portions correspond to the volume enclosed between two ribs or ribs and the chamber wall, the bottom of the chamber and the surface of the depression of one of the rolls. The surface of the protrusion of one roll sequentially comes into contact with the surface of the valleys of the other roll in each section of the forming zone between two adjacent ribs. When a hollow is rolled around the material with the ridge of another roll, the formable mass is compressed due to a gradual decrease in volume between

the bottom of the chamber and rolls, pressing and pushing it through the holes of the nozzle 9; at the same time through any hole of the die is uniformly pushed through the same volume

Q amount of product v

: Since the granulation process is cyclically, at the time of the suspension of the process, it is molded when the entire mass

j in the hollow of one vadka, the crest of the other roll was forced through the holes of the spinneret, and the pressure in the molding zone is still not enough to form the next portion of the mass,

enclosed in the hollow of another roll,

at this moment the cut is made. Kie knives device 13 identical in length granules, have the correct, equidimensional cylindrical or needle-like shape.

Claims (1)

GRANULATOR FOR PASTE MATERIALS, containing a chamber, a bottom with die holes, having the shape of two half cylinders, and parallel rolls installed in the chamber with hollows and protrusions made in the form of continuous longitudinal ridges with an involute lateral surface, the outer diameter of which is equal to the diameter of the cylindrical part of the bottom, and the width is equal to the width of the depressions associated with the rotation drive, characterized in that, in order to improve the quality of the granules, the rolls are made with annular grooves, and the granulator is equipped with ribs replicated on the bottom, placed in the grooves of the rolls and dividing the camera into sections, horizontally mounted in the upper part of the housing with feeding cams and chippers fixed on the inner side surface of the housing parallel to the crests of the rolls. ¹ SU „„ 1161173 ϊ _χ 1161173