SK287723B6 - Briquetting or pelleting press with high resistance of extruder - Google Patents

Abstract

Briquetting or pelleting press with high resistance of an extruder consists of a mirror arrangement of extruders (1, 2) in two compression chambers (8, 9), concerning the common drive (3), while shafts (4, 5) of extruders (1, 2) are located in the first tapered axial bearings (6, 7) in the body of the press. The extruder (1, 2) may be by a composite structure, such as two-piece with the back part while the front part is replaceable and has a length of 1 to 2 1/2 thread, or the extruder (1, 2) can be only integral .

Description

The present invention relates to a briquetting or pelletizing press with a higher screw resistance. The invention belongs to the field of briquetting or pelleting of bulk materials of organic and / or inorganic origin.

BACKGROUND OF THE INVENTION

Compaction technologies in general for loose waste have been known for more than 135 years. Wood briquettes have been used in the US 80 years ago. The common feature of all compaction technologies - briquetting, compacting and pelleting is the pressing of the material at high pressure with a suitable humidity temperature and the size of the compacted material fraction. A suitably selected pressure and temperature are necessary conditions for the compacted material to be compact even without binder after compression. Another condition is the maximum fraction size as well as the permissible moisture of the compacted waste.

For compaction of biomass, it is currently required not to use a binder in compaction technology. Pelleting and briquetting technologies meet this condition. The output product of pelletizing, briquetting are pellets, briquettes of cylindrical shape or of n-angular shape with unlimited length. Compacting biomass is not currently beneficial for compacting biomass, as this technology does not contain a stagnation phase. A binder is used to form binding forces.

For example, the 1968 compact press described in U.S. Pat. No. 3,593,378 is known in the art, but is not suitable for the production of briquettes from biomass.

Due to the persistent pressing problems with screw briquetting presses such as the Pini & Kay manufacturers, where extremely high loads on the thrust bearings of the screw and high wear of the screw after 24 hours of pressing (breaking of the screw thread) arose the requirement to create such a briquetting or pelletizing design. press, which would provide a suitable design solution to increase the service life of thrust bearings and the service life of the screw itself.

As a result of this effort, the construction of a briquetting or pelleting press with the elimination of axial forces ensuring a longer service life of the thrust bearings and with a higher screw resistance in the present invention is described.

SUMMARY OF THE INVENTION

These drawbacks are overcome by the construction of a briquetting or pelletizing press with a higher screw resistance according to the invention. The essence of the construction is that two identical briquetting or pelleting presses are coupled into one functional unit in such an orientation that the pressing direction is directed from the mirror plane to the left side and to the right side. A common component in this assembly is a drive realized, for example, by a V-belt transmission wheel. The shafts of the worms with the worms themselves are anchored to the central axis of the drive. This means that the worms themselves are also mirrored in their bale chamber with respect to the common drive. The worm shafts are mounted in the first tapered thrust bearings in both press bodies. In order to minimize the amount of axial thrust forces applied to the worms, the worm shafts are housed in second tapered thrust bearings in a common drive. Since the drive has a common rotation for both the left-hand screw and the right-hand screw, the left-hand screw is left-handed and the right-hand screw is right-handed or vice versa. For demanding constructions, the screws are of folded construction. This means that the worms are two-piece with a threaded back, the front of the screw being replaceable and having a thread length of 1 to 2½. For special briquetting or pelletizing press designs with a higher screw resistance in accordance with the present invention, the three-part screw with the rear part can also be provided with a thread, a central part of the screw that is replaceable and 1 to 2 1/2 threads long and finally front. In general, the screw may be a multi-part screw comprising at least one threaded rear portion, at least one central screw portion, which is replaceable and has a length of 1 to 2 1/2 of the thread and the front portion is finally a cone. For undemanding constructions, the worms are integral.

The service life of the worms can be increased by selecting a suitable base material, heat treatment and surface treatment such as coating. For example, the worms are cemented and hardened.

The advantages of the construction of a briquetting or pelleting press with a higher resistance to the screw according to the invention are obvious from its external effects. At the same time, the mirror design eliminates axial forces on the bearings, significantly extending their service life. Also, due to the wear of the end portions of the worms over a longer period of time, these worn portions of the worms in the length of 1 to 2 '/ 2 of the thread can be replaced.

BRIEF DESCRIPTION OF THE DRAWINGS

A briquetting or pelletizing press with a higher screw resistance according to the invention will be explained in more detail in the accompanying drawings, in which: FIG. 1 shows a principle construction. Fig. 2 shows a side view of the briquetting or pelletizing press construction with higher screw resistance. In FIG. 3 shows the course of deformations on the screw. In FIG. 4 shows the construction of a three-part screw.

DETAILED DESCRIPTION OF THE INVENTION

Individual embodiments of the invention are presented for illustration and not as a limitation of the technical solutions.

Those skilled in the art will find or be able to ascertain using no more than routine experimentation many equivalents to the specific embodiments of the invention that are specifically described herein. Such equivalents will also fall within the scope of the following claims. For the skilled person skilled in the art, the dimensioning of such a device and the appropriate selection of its materials and construction arrangements cannot be a problem, therefore these features have not been solved in detail.

Example 1

In this example of a particular embodiment of the present invention, an optimum construction solution of the briquetting press with the higher resistance of the screw shown in FIG. 1 in its principal construction and FIG. 2 in its side view and a partial section. The briquetting press consists of a structure where two identical briquetting presses are coupled into one blowing unit with an orientation such that the pressing direction is directed from the mirror plane to the left and right sides. A common component in this assembly is a drive 3 realized, for example, by a V-belt transmission wheel. The worm shafts 4, 5 of the worms with the worms 1, 2 are anchored to the central axis of the drive 3 on both sides. This means that the worms 1, 2 themselves are also mirrored in their pressing chamber 8, 9 with respect to the common drive.

3. The shafts 4, 5 of the worms 1, 2 are in this case mounted in the first tapered thrust bearings 6, 7 in both bodies of the screw press. In order to consistently eliminate the axial forces during the pressing on the worms 2, the shafts 4, 5 of the worms 1, 2 are mounted in the second tapered thrust bearings 10 in a common drive 3. Since the drive 3 has a common rotation for the left worm I and for the right screw 2, the left screw 1 is left-handed and the right screw 2 is right-handed or vice versa. In this case, the worms 1, 2 are integral as shown in FIG. 3. The worms 1, 2 are provided with a surface treatment, for example a coating.

Example 2

In this example of a particular embodiment of the present invention, a briquetting press with a higher screw resistance for demanding technological operations is described which is sufficiently described in the previous example but with a variant screw solution. The difference in the design lies in the fact that the worms I, 2 are of a folded construction. That is, the worms 1, 2 are in two parts with a threaded rear part, the front part of the worm 1, 2 being replaceable and having a thread length. The screws 2 are cemented and heat treated by hardening.

Example 3

In this example of a particular embodiment of the invention, a pellet press with a higher screw resistance for an even more demanding technological operation is described, which is sufficiently described in the previous example but with a variant screw solution. The difference in the design lies in the fact that the worms 1, 2 are of a folded construction. That is, the worms 1, 2 are three-part with a threaded rear part, the central part of the worm 1, 2 being replaceable and having a length of 2 threads and the front part is finally a cone as shown in FIG. 4th

Alternatively, it is possible to construct the worms 1, 2 or even more.

Industrial usability

A briquetting or pelletizing press with a higher screw resistance finds utility in the industry where it is necessary to process the bulk form of the material into a compact solid compact, briquette or pellet.

Claims (9)

1. A briquetting or pelletizing press with higher screw resistance, characterized in that it comprises a mirror arrangement of the worms (1, 2) in two pressing chambers (8, 9) with respect to the common drive (3), the shafts (4, 5) The worms (1, 2) are mounted in first tapered thrust bearings (6, 7) in the press body. A briquetting or pelletizing press with a higher screw resistance according to claim 1, characterized in that the shafts (4, 5) of the worms (1, 2) are mounted in second tapered thrust bearings (10) in a common drive (3). A briquetting or pelletizing press with a higher screw resistance according to at least one of claims 1 to 2, characterized in that the screw (1) is left-handed and the screw (2) is right-handed or vice versa. A briquetting or pelletizing press with a higher screw resistance according to at least one of claims 1 to 3, characterized in that the screw (1, 2) is of a folded construction. A briquetting or pelletizing press with a higher screw resistance according to at least one of Claims 1 to 4, characterized in that the screw (1, 2) is two-piece with a rear part, the front part having a length of 1 to 2 * / ₂ turns. Higher screw briquetting or pelletizing press according to at least one of Claims 1 to 3, characterized in that the screw (1, 2) is of three parts with a rear part, the central part having a length of 1 to 2 itu of the thread and the front part being a cone . Higher screw briquetting or pelletizing press according to at least one of Claims 1 to 3, characterized in that the screw (1, 2) is multi-part with at least one rear part, wherein at least one middle part has a length of 1 to 2 * / ₂ thread and the front is the cone. A briquetting or pelletizing press with a higher screw resistance according to at least one of claims 1 to 3, characterized in that the screw (1, 2) is integral, A briquetting or pelletizing press with a higher screw resistance according to at least one of claims 1 to 8, characterized in that the screw (1, 2) is surface-treated. 4 drawings