SU1209269A1 - Granulator - Google Patents

Description

2, Pellet mtf according to claim 1, regarding a lattice with the fact that the lattice

1209269

 mounted on the intake part of the screw through the rotation axis of the axis.

The invention relates to chemical engineering, in particular to apparatus with rotating granulation, drying and cooling drums, designed for chemical heating.

The purpose of the invention is to increase the uniformity of the particle size distribution of the resulting product.

Fig 1 shows a granulator, general view, in section; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. one; in fig. 4 is a view of B in FIG. one.

The granulator contains a rotating cylindrical inclined drum 1, on the inner surface of which along its circumference there are rows of blades 2. The drum 1 can be divided into two zones: granulation-drying 3 and cooling 4.

The granulation-drying zone 3 starts from the loading device 5 and ends with a retaining cone 6. A reverse screw 7 passes along the perimeter of the casing.

The cooling zone starts from the retaining cone 6 and ends with the unloading device 8. In the center of the granulator body passes the fan pipe 9, on which the small back screw 10 is fixed.

The inlet 11 of the fines from the secondary process is in communication with a fixed annular chamber 12 placed in front of the discharge device 8. The inner surface of the fixed annular chamber 12 is formed by a drum 1 pellet thorao Section of a non-detachable annular chamber 12 overlaps the bucket 13 fixed to the drum 1 granulator tangentially to him

In front of the bucket 13, a window 14 is made in the drum 1, which provides a fixed annular chamber 12 with a small reverse screw 10. The intake part 15 of the small reverse screw 10 projects above the inner surface of the granulator drum 1 to a height h equal to the thickness of the fine fraction layer and is rotatable around his

5 axis 16 with a grating 17, the cells of which exceed the diameter of the granules of the fine fraction, i.e. The cells are 1x1 mm in size. The discharge device 8 is provided with a retaining ring 18,

0 in contact with the intake part 15 of the small reverse screw 10.

At a distance of 2–3 m from the retaining ring 18, the inner surface of the drum 1 has no blades, i.e.

-5 she is smooth.

The intake part 15 of the small reverse screw 10 is set at an angle of 45 to its cross section. All constructive elements of the fence

0 parts 15 of the small reverse screw 10 are repeated in the intake part 19 of the reverse screw 7.

Pellet torus works as follows.

5 When the drum 1 rotates, the bucket 13 moves through the fixed annular chamber 12, which picks up the product of the fine fraction entering the fixed

Ci ring chamber 12 through the pipe 11 from the secondary process, and sends it through the window 14 in the drum 1 to the small reverse screw 10.

The intake part 15 of the small reverse screw protrudes above the drum 1 of the granulator to a height h the thickness of the layer of the fine fraction formed in front of the retaining ring 18 as a result of the mixing of the product.

With the mixing of the product, a classification effect occurs, consisting in TOMj that the coarse fraction remains at the top, and the fine fraction, the passage between the coarse fraction, settles down. To ensure this effect, drum 1 of the granulator is a torus at a distance of 2-3 m

from the retaining ring 18 has a smooth inner surface - a slope of calm,

The intake part 15 of the small reverse screw 10 as the body rotates enters the product. The product begins to flow along the intake part 15, installed at an angle of 45 ° to the cross section of the small reverse screw 10, as a result of the small fraction enters the small reverse screw, further classified through the grid 17, the cells of which have dimensions of 1x1 mm. The intake part 15 of the small reverse screw 10, mounted at an angle, makes it possible to increase the classification efficiency, since when the intake part moves through the product layer, an area of greater magnitude comes in contact with it than when the intake part is made with a regular straight inlet, thus, the likelihood of particles falling into the cell increases.

To reduce the likelihood of sticking of the product (which is possible with a poor-quality process) on the grid 17, the latter has the ability to rotate around its axis 16, i.e. when passing through the intake part 15 of the return screw 10 of the lower part of the drum, the product of the fine fraction is captured. At this moment, lattice 17 is closed. As the intake part 15 of the small reverse screw 10 rises, the grating receives a non-equilibrium position and tern equilibrium turns, hitting the intake part 15 of the small reverse screw 10, i.e.

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shaking of the grate 17 or its automatic cleaning of the adhering product occurs.

The operation of all the structural elements of the intake part 19 of the return screw 7 corresponds to the work of the structural elements of the intake part 15 of the small reverse screw 10.

The retaining ring 18, installed 10 before the unloading device heme 8, narrows the bore of the drum. This creates an increase in the velocity head in the cross section of the under-porous ring 18, as a result, 5 an artificial seal is formed, since the dust flying in the drum 1 of the granulator cannot penetrate into the discharge device 8. This allows you to remove this dust from the drum 1 through the pipe 9 and apply it to the dust suppression device, from which it is fed into the pipe 11. The input of the fine fraction of the secondary process. Next, the dust falling into the underfill ™ of the annular chamber 12 is captured by the bucket 13 and introduced into the small reverse screw 10. From the latter, the dust is poured into the reverse screw 7, and then unloaded at the head of the grater, where it re-enters the main technological process, playing a role re-, tour.

The use of the proposed technical solution in comparison with the known one allows to improve the uniformity of the particle size distribution of the product being produced, to increase the productivity of the granulator and the efficiency of product classification in the granulator.

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View 6

In id

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Compiled by R. Gor Inova editor N. Tupitsa Tehred L. Mikesh Corrector M. Demchik

Order 346/12

Circulation 527

CHERRIES of the USSR State Committee

for inventions and discoveries 113035, Moscow, F-3 of Raushsk nab. d, 4/5

Filial PPT1 Patent j g, Uzhgorod, st. Project, 4

FIG.

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Claims (2)

1. GRANULATOR, including a rotating drum with blades, loading and unloading devices installed on its opposite ends, a main return screw mounted inside the drum, a fixed annular chamber equipped with a small fraction input pipe, a gas exhaust pipe, strengthen- ^! a small return screw located on it, the intake part of which is connected to the annular chamber and blocked by a grid and the outlet end of which is connected to the main return screw, characterized in that, in order to increase the uniformity of the particle size distribution of the obtained product, a stationary annular chamber is located outside the drum in front of the unloading device, the intake part of the small screw protrudes above the inner surface of the drum and is connected to a fixed annular chamber by means of a window made in a bar ane, and bucket, reinforced the drum and situated in the chamber, the drum is provided with a booster ring disposed between the chamber and the discharge device, the inner surface of the drum before discharge device is made smooth. From the cooling system of the bozdiha Fig! > 2. Granulator according to π. 1, etc., and the fact that the grill is mounted on the intake part of the auger by means of a rotary os.