HU204450B - Method and apparatus for dry-grinding preparation granular-like foodstuffs and fodder - Google Patents

Abstract

Field of the Invention The present invention relates to an apparatus for preparing dry grinding of granular food and feed, in particular for cleaning, separating fractions and, in particular, for foreign contaminants such as sand, stone, lumps, etc. having an oscillating unit which is inclined relative to a horizontal plane, and a vibrating weight grading unit, which is also inclined at an angle to the horizontal plane, each having an upper material inlet and a lower material discharge, and means for delivering flow of material and means for generating airflow. It is proposed that the size classification unit and the mass grading unit be formed as a single oscillating group and arranged one above the other in the form of a fork, or a somewhat wedge-shaped spacing (22), and a material stream transferring from the size classification unit into a wide carpet falling into the mass grading unit below. being a material transfer material material flow device, and air flow generating means are provided as means for passing through the airflow only at the fork-shaped or V-shaped spacing (22). It is another object of the present invention to provide a process for preparing granular grain and feed mills by milling the material flow at least once by size and then at least once by weight, and passing the material stream through a wide spread throughout the classification. In a novel way, the material flow in the size classification unit is guided in a uniform manner across the grading unit of the mass grading unit and from the point of entry into the size grading unit until it exits the grading unit of the selected fraction in a uniformly wide and flat manner. (Figure 1) .12 EN 204 450 B Scope of the description: 14 pages (including 5 sheets)

Description

Scope of the description: 14 pages (including 5 sheets)

EN 204450 Β

Field of the Invention The present invention relates to an apparatus for preparing dry grinding of granular food and feed, in particular for cleaning, selecting fractions, and externally foreign contaminants such as sand, stone, trowel, and the like. having an oscillating size grading unit which is inclined relative to the horizontal plane, and a vibrating weight grading unit disposed beneath the horizontal plane, each having an upper material inlet and a lower material outlet, and means for delivering material flow and means for air flow.

The present invention relates to a process for preparing dry milling of granular food and feed, in particular for cleaning, fractionation, and especially foreign contaminants such as sand, stone, trowel, and the like. by selecting the material stream by at least one size by vibration and air flow, and then classifying it at least once by weight, and passing the material stream through at least part of the size and / or weight grading, Recently in milling mines In short, in mills, the number of special machines used for dry milling, shortly for grain cleaning, has been significantly reduced. Conversely, common and common structures, such as different sieves and separators, are becoming more and more frequent particle separators, found in almost all new mills. In these cases, we have to accept the fact that each device or structure has been designed to solve a specific task and with air extraction units, vibrators, etc. is completed. Targeted design made it possible to generate the required air volume and energy for vibrator operation with minimal investment and maintenance costs, with relatively low equipment costs, increased productivity and improved product quality compared to older equipment.

Most of the mills currently built include four building complexes that are conveniently located next to each other:

a building for the silo, a second building for milling, a third specifically for milling and milling, and a fourth for finished products. 1

The machines and equipment needed for milling and grinding are spread over four or five floors. Depending on the capacity of the warehouse, the co-owners usually outstrip mill buildings at their height. Which is the most natural thing for storerooms, namely, that the material stored in them is removed through the openings in the lower part of the buildings by utilizing the force of gravity; it has been used for many decades in dry grinding machines. It is known that the material is loaded up to the top floor, so that it only moves gravitationally, by its own weight, from floor to floor, or from machine to machine.

All of the milling parisakembercompetent.We are preparing for milling, especially dry milling preparations, more specifically cleaning, separation, fractionation, etc. just as important as the grinding itself. This is embodied in the fact that most ma10 lacquer equipment leaves only ample space for dry mill preparation and cleaning machines so that there is no immediate need for further concentration.

In the preparation of dry grinding of food and feed15, a number of fundamental disadvantages have arisen from the interconnection of grinding preparatory machines per floor. For separating, classifying, and separating operations, the entire material flow in the machine should be transformed into a flat, thin layer or thin, downwardly falling veil, and then sent to the next machine for uniform batch formation, then, after being transferred to the next equipment, it must be spread again.

For a flat, flat spread of such a material stream: a specially trained entry section is required for each device. This is the only way to prevent the initial phase of a given device from being misused on a given surface.

They have often played with the idea that on one floor, one equipment is simply sorted out after another, judging by the quality of the grinding preparation, this solution would be very beneficial. However, since each machine and equipment requires other optimum conditions, structurally complicated and costly transition portions would occur, especially when adjacent machines vibrate against each other, i.e. in opposite directions. In process techniques, it has always been repeatedly shown that machines with a large surface area are difficult to handle. Machine malfunctions failures can only be recognized late, so often a slight disturbance in a gear can for a long time adversely affect subsequent steps.

U.S. Patent No. 4,466,542 discloses a classifying device that has two air-permeable fluidized bed openly inclined with respect to the horizontal plane from the main requirement and the description, arranged separately from each other in order to they can carry out independent vibration movements relative to the support frame of the apparatus, and material dispensing means emitting a light fraction fraction is attached to one end of the upper fluidizing bed. Anyagkivezető additional tools are arranged between the material and the introduction of anyagkivezetés, on which ^one crosses beyond the upper fluidized bed of heavy grain fraction

HU 204450 Β, while at the other end of the lower fluidizing bed, third material outlet means for emitting heavy contaminants, such as stones and the like, are formed, and at the other end of the lower fluidizing bed, a fourth material outlet leading to the heavy particle fraction is formed. In addition, the device has a supporting structure for fluidizing beds independently of each other, while a separate vibrating drive is associated with the upper fluidizing bed and the lower fluidizing bed to provide a fold opposite to one another. The size classification unit and the mass grading unit are inclined in the same direction. In such a configuration, the material flow from the screen size scaling unit to the underlying mass classification unit takes place not only at the end of the size grading unit as a material discharge or at the end of the mass grading unit as material introduction, but also materially passes through the entire screen-sized surface of the size classification unit to the surface of the underlying mass classification unit. and it is disadvantageous.

U.S. Patent No. 4,490,247 discloses a mixture of materials for breathing lighter and heavier fractions, which can be used, for example, to remove stones from a granular material mixture. The apparatus comprises a first elongated vibrating transport table, which vibrates parallel to its length, and moves the material thereon towards the end of the material, forming air flow generating means and flow means in the region of the means of conducting the nut carrier, which are the air nozzles arranged at the end of the first delivery table as a material discharge. in addition, there is a second elongated vibrating conveyor, one end of which serves as a material inlet at a distance from the end of the first transport table as a material discharge, with a gap between the two. The second conveying end of the second delivery table extends upwardly at an upward slope, then moves horizontally, and as a result, the heavier components in the falling stream flow downwardly from the sloping end of the second transport table, while the lighter fraction, with the air flow, moves upward on the tilted surface to the horizontal portion of the transport table. and the second delivery table is actually divided into two horizontally located horizontal portions, and the air nozzles are located just below the lower part so that the lighter fraction falling from the top to the lower part and the lighter fraction from the lighter fraction inadvertently enters - therefore, the particulate material - the airflow passes through to the granular material discharge, while the material fraction is rolled down to the material discharge. The unit has a single common vibrating drive, so both the first and second delivery tables vibrate in the same phase, in one direction. The drawback of this is that the efficiency of the device is not favorable with regard to the energy input and the separation achieved.

The object of the invention is to improve the preparation of dry grinding of granular food and feed, so that the work operations are concentrated, but each stage is sufficiently clear. In addition, it can intervene in each step of the operation, such that the performance of the equipment and the quality of the work are as in known cases.

The solution to this problem is based on equipment suitable for the preparation of granular food and feed for dry milling, in particular for the cleaning of grain-like food and feed, the selection of fractions and the use of nerve-staining agents such as sand, stone pebbles, etc. an apparatus for selecting a device which is inclined in relation to a horizontal plane and having a vibrating partitioning unit which is also inclined at an angle to the horizontal plane, each having an upper material inlet and a lower material discharge, and means for delivering material flow and means for generating airflow. This apparatus has also been developed in accordance with the present invention by the size-dispensing unit and the mass grading unit being formed as a single array and arranged overlapping v-shaped or V-shaped, in the form of a wafer-shaped or V-shaped space, and a material flow transfer. its means are provided as means for transferring from the dimensional dispensing unit to a wide carpet layer material flow into the underlying subdivision unit and its airflow generating means are provided as means for passing through the airflow only at the fork and V-shaped spacing.

In the case of inventions, we often feel that, after understanding the essence of the solution, it seems incomprehensible that the given simplest and optimal solution has not been applied before.

In doing so, we are looking for reasons that might explain why a trained expert in a given field did not get, why he couldn't get the inventor or inventor's idea. Mass grading units require a very high level of ventilation to form a smooth, thin layer of material. In contrast, the size classification units, i.e. the sieves, can only be provided with poor suction ventilation, otherwise the starting coat particles can easily rise and float to the surface of the flowing material layer. The size classification unit and the mass grading unit according to the invention have a fork-like or V-shaped overlapping arrangement providing two essential advantages immediately. The transfer of the material from the top-of-the-class size classification unit to the underlying mass grading unit is carried out evenly over the entire width of the screen, meaning that the known dry grinding preparation equipment outlines the material flow - spreading, and then bundling, and then re-spreading - in all three basic functions, i.e. for size distribution, mass class1

HU 204450, and in particular the separation of light and heavy fractions, as well as the separation of the stone, is completely absent. Only the first point of entry into the equipment requires the creation of a flat, evenly spread material layer and a material stream. Thereafter, this material stream is kept in this form in the form of an epitaph.

Thus, the invention provides a simple but effective solution to the problem outlined in the introduction, by simple means, and even better by utilizing the work volume of the equipment.

Basically, both the size classification unit and the mass grading unit can be equipped with a separate vibration drive, but more preferred is an embodiment of the apparatus according to the invention where the size grading unit and the mass grading unit have a single, combined vibrating drive such that both units are in the same manner, i.e. it vibrates in the same direction with frequency and amplitude.

In this case, the oscillating drive is disposed on both sides of the vibrating group in its approximately horizontal center of gravity, such that the mass grading unit vibrates upwardly with a predetermined drum vibration, while the size grading unit moves with a drum vibration leading downward. All of the work surfaces of these units perform essentially optimal vibration movements. Our experiments with the equipment have proved that with such a design it is possible to provide a sharp, definite separation even in the case of large flow volumes.

According to a further preferred embodiment of the proposed apparatus, the means for generating the air stream and passing it to a particular group of the apparatus have a bottom-closing bottom plate, whereby a suction fan is connected to the side of the suction ventilation space between the size classification unit and the mass grading unit. By placing the bottom plate on the bottom of the size classification unit, the screen section, the material flow bed, can be easily separated from the air.

Also preferred is an embodiment of our preferred apparatus, wherein one side of the extended suction ventilation space is divided into at least two extraction chambers, namely an upper and a lower exhaust chamber, where both the upper exhaust chamber and the lower exhaust chamber are associated with adjustable air-throttle valves.

With this construction, the air distribution to the mass grading unit can be controlled in a very simple way with the desired accuracy without negatively affecting the size classification unit operation over the mass grading unit.

In addition, the underlying idea of the present invention provides the construction of a number of other very preferred embodiments, such as the lower end of the light particle separator can directly enter a vertical suction channel to separate the light fraction from a portion selected by the mass grading unit.

The advantages of the invention are particularly evident in this combination, as the material is transformed into a thin layer of entry into the device according to the invention. This thin material layer & along the entire length of the machining path, i.e. from the screen of the size grading unit through the collecting table, remains uninterrupted to the stone separator. According to the invention, the air containing the powder can only be passed through the channel, and on the same large surface, into the suction duct 10. For this reason, an image may be formed as a result of passing a wide textile belt on a textile printing apparatus and performing the appropriate work steps step by step on this tape.

A particularly interesting aspect of the present invention is a preferred embodiment, in which the suction ventilation space extended on one side is provided with an air intake which conducts air back to the suction side of the separator in a closed circuit through the dust separator.

In many applications, this idea of the invention represents a great step forward, especially in small and medium-sized enterprises. Thus, the present invention allows the construction of a dry grinding preparation machine, which has so far been composed of several separate machines, as a single compact device, and thus the construction and maintenance of the air evacuation and the central air filter and air purification equipment of each machine can be omitted.

The invention allows the individual process steps to be carried out in a single unit, in many cases without separate filters, by recirculated air.

According to a particularly preferred embodiment of the proposed apparatus 35, the mass grading unit consists of two descending desks arranged over the same air stream. In this case, it is also possible to place the top grading table as a collecting table or as a light particle separator, or as a pellet separator, and to form the lower grading table as a stone separator table. In addition, it is also possible, according to a preferred embodiment of the proposed apparatus, for the size grading unit to be formed of a two-piece, also arranged over one another, or two or more different stacking tables are placed one above the other. Classification tables used in the same grading unit are preferably arranged in parallel with each other.

In addition to the equipment, the task is to prepare dry grinding of grain-like food and feed, especially for cleaning, fractional selection, and especially foreign contaminants such as sand, stone, trowel, etc. by selecting a train path method, wherein the material flow is at least once sized by vibration and air flow, and then weighted, and the material flow is at least partially widened throughout the classification. This procedure has been further developed so that the material flow is the size4

HU 204450 Β is routed in a grading unit opposite to the direction of the flow gradient and inclination of the mass grader unit and from the entry into the size grading unit to the exit of the selected fraction from the grading unit, evenly and flatly extended.

In a preferred embodiment of the proposed process, the air stream produced for the classification is only driven through the mass grading unit and the space immediately above it.

Based on these, the notified equipment and process not only ensures a strong concentration of the individual operations while retaining the control of the operations, but also performs the optimization of the individual process steps, since each subsequent process step benefits from the carpet-like material transfer from the previous operation. When the material stream is free to fall down as a material layer or as a carpet, it also loosens the particles in the material stream, so that any material particles that have been stuck together are then separated again.

The invention will now be described in more detail with reference to the drawings, in which some exemplary embodiments of the device implementing the method are shown. It is in the drawing

Fig. 1 is a schematic diagram of an embodiment of the apparatus according to the invention, a

Figure 2 shows an embodiment of the apparatus of Figure 1 with suction ventilation, a

Figure 3 is a schematic diagram of an embodiment of a suitable apparatus with a closed air system and an additional separator in Figure 2;

Fig. 4 shows the embodiment of the apparatus according to Fig. 1 with two stacked stone separators with table and parallel running screens;

Fig. 5 is a schematic illustration of a further embodiment with a top collecting table and a bottom stone separator table.

The device (1) according to the invention has a single but preferred embodiment of a screen (2) and a collecting table (3) as a size grading unit, and (4) a collector as a mass grading unit. (5) symbolically denotes a vibrator whose vibration direction is angled with a horizontal (6) center of gravity. In this case, this vibration direction is parallel to the drawing of Figure 1 or the direction of the main stream. The device (1) (7) is built on a frame (8) supported by vibration bed, which is positioned on the ground (9). A material inlet (10) is provided above the screen (2), which (11) is firmly connected to the non-vibrating floor (12) via a suspension. A flexible cuff (13) is provided between the material inlet (10) and the screen (2) to provide a connection between the non-oscillating and vibrating parts of the device (1). The area (14) for entering the material (2) to be prepared into the sieve is formed as a distribution space such that the bundle of material arriving through the material inlet (10) extends as an even carpet on the top (15) coarse surface,

Preferably, the coarse screen (15) serves to remove rough dirt, additives, and interfering foreign bodies, such as strips, pieces of wood, and the like. which can then be removed from the material stream (16). The space above the coarse screen (15) (17). the cover is completely sealed outwards so that no dust is drawn out and no air exchange takes place. The (15) coarse & sieve. spaced apart from it (18). The separating sieve (18) has a relatively fine sieve density to provide the material-sized components in the material stream, such as fine sand, granular fragments, and the like. select and store separately. The material (18) that passes through the separator (15) can be removed from the apparatus through a closed, substantially air-tight (19) bottom plate and a sand outlet (20) connected thereto. The material stream portion remaining on the separator screen (18) spreads across the width of the separating screen (18) to the ring table (3) that passes through the strong air flow. Discarding the stream of material (18) on the separating screen, and reversing the flow direction of the material flow thereafter, performs a double task on the collecting plates (3). On the one hand, the material parts in the material stream are loosened, for example, the particles are only slightly adhered to the particles or the core parts loosen and can be easily detached, which facilitates the selection of later fractions. Another advantageous feature is that unlike the prior art solutions, the material flow remains as a mat in its entirety, while the substantially different physical effects and forces required for the particular treatment can still be fully utilized. For example, from a transfer point to a single continuous wide material stream, the material passes through the air-impermeable screen surface, more precisely to the separator screen (18), and then passes into a vortex layer that passes through a strong, strong air stream, i.e. the collector table (3).

On the non-aired screen surface, the material is subjected to mechanical impact only, namely, the particles collide mechanically.

Like the vibration compacting of the concrete, the vibration flow stream strives to maximize vibration stress, where the smallest particles of matter immediately fill the voids of the lower layer formed by the larger particles. However, since the bottom of the screen is permeable to small particles, these sieves pass through and thus filter out. Larger parts, including large areas, are also trying to get to the surface of the material stream. The main forces or main effects that we use on the sieve are due to the different size of the particles in the stream,

In contrast, the power of the air in the vortex layer is used as a pond. Accordingly, a very definite stratification occurs within the vortex layer according to the weight of each portion of the brush. Assuming the same grain size, the grain grains move upwards in the vortex layer, while the stones move downwards

At the end of the separating screen (18), the portions of the stack hanging on the stack are fed to the left top table end and the vibration oscillating oscillations are directed to the left top table end (36). In contrast to the stone separator (4), the collecting table (3) has a smooth surface, (in practice, a fine plate with tiny holes), so that the surface of the collecting table (3), despite the same vibration of the stone separator (4), exerts only the heavy material layer closest to the table surface transport effect. The effect of the fluidizing bed is through the flow of material to the fluid stream.

The common vibration direction of the collecting table (3) and the rock separator (4) is also suitable for the screen (2), and the material stream moves as a result of the vibrations of the screen surface of the screen (2).

The foregoing has shown that with the aid of the invention, all three classifying units, i.e. the color (2), the collecting table (3) and the rock separator (4) can be provided as a single oscillating group, and yet each operation can be performed optimally. However, with the same air, only the oil separator (4) and the collecting table (3) are vented.

Both the screen (2) and the collecting table (3) and the rock separator (4) are arranged directly above each other in accordance with the invention. By making full use of the many combination effects of the present invention, the entire apparatus 1 is only human in height, so it can be built up or placed in a room of normal size. Particularly preferred are those skilled in the art of creating the invention 30, a surprisingly successful match between the (2) and the collecting table (3).

The invention furthermore comprises a number of preferred embodiments.

for example, according to Figure 2, the embodiment (1) according to the invention can be used in combination with a vertical (4) suction ventilation channel. In the space extending towards one side (22), the wall (26) is preferably adjustable 40 so that both the air volume distribution on the surface of the collecting table (3) and the air required in the suction air channel (40) can be individually adjusted by means of a throttle valve 41 .

The amount of air extracted from the higher parts of the spacing (22) can be adjusted by the control valve (42).

In the embodiments shown in Figures 1 and 2, the bottom of the oil separator 4 is air-permeable so that the bottom 60 can freely flow in and flow from the bottom into the rock separator (4). Both solutions operate in so-called suction mode, which is a great advantage in terms of easy air flow control 55.

The device of the invention (1) according to the embodiment shown in Fig. 3 is more similar to that of Fig. 2, but is able to provide additional basic functions. It allows the (1) to reach the collecting table (3) and the flow direction of the material stream at the front of the collecting table (3) and, as a result, the material stream is shaken into a compacted bed layer layer with a very short path. Neither short-term performance growth nor volume fluctuations can negatively affect the quality of the overlay, even within relatively large limits. This is precisely the essential element of the surprising success of the invention. 10

As can be easily seen from Figure 1, the screen (2) and the collecting table (3) have a fork-like (or V-shaped) arrangement extending in one direction (22) extending through (23) a suction port (24). ) is connected to a suction line. (25) By setting the throttle, the air quantity required by the operation of the device 1 can be adjusted. In one case, the increasing space (22) is divided into a single (26) wall (22 '), (22'), and an exhaust chamber. This allows the throttle (27), (28), if necessary, to set more or less strong airflow in one or another (22 '), (22') exhaust chamber (i.e., the upper or lower part of the fluidized bed). A flexible cuff (29) similar to the cuff (13) is mounted between the exhaust port (23) and the suction line (24).

The collecting table (3) is responsible for layering the material stream and concentrating the specific heavy material particles in the area of their own table surface. At the lower end of the collecting table (3), at a short distance where the collecting table (3) becomes air-tight (so far, the collecting table (3) is breathable but has a material-impermeable design), has a large material flow opening (30). Through this section (30), the layer enriched with the lower heavy material portions, particularly stones, comes directly to a sliding (31) slope and then moves into the central region of the rock separator (4). With the help of the adjustable (32) stacking material, it is possible to fix the percentage composition of the material stream, such as the proportion of the heavy fraction pertaining to the pellet separator (4). The latter is thus passed directly to the corresponding (33) outlet. There is also the possibility of guiding a medium-heavy fraction (34) through ancillary passageways marked by an arrow at the lower end of the collecting table (3) to a heavy stump, i.e. a good, only tough eye (35).

The stone separator (4) has a rough surface in which a grading grid is conventionally incorporated. The material flow is the most difficult, followed by the (4) stone separator table6

HU 204450 is only operated with air flowing in and out of the enclosure and is provided with a light particle separator for this purpose.

The exhaust air leaving the suction channel (40) enters directly into the cyclone (50), in which highly dust and core particles are released in the air and can be extracted from the apparatus (1) through the dust filter (51). The feed air (52) and the return line (53) return it to the classifier part of the device (1). For this purpose, the space (54) below the rock separator (54) is completely closed to the outside world by the air distribution chamber. The air distribution chamber (54) forms part of the oscillating group and is connected via a flexible cuff (55) to the return line (53). The rock separator (4) is a sandwich structure known per se, comprising a bottom plate (56) with fine holes at the bottom to provide a good distribution of air to the surface of the stone separator table (4).

If the device (1) does not include a suction system, the filter (1) (61) can be fitted with a filter not shown in the drawing. By means of the fan (58), which is preferably mounted after the cyclone (50), the desired pressure distribution of the device (59) and (60) can be set, symbolically indicated by the plus and minus signs circled in the drawing.

If the apparatus (1) is operated with circulating air in a non-enclosed system, the device parts for this purpose may be omitted.

However, the cyclone (50) can still be retained, and the exhaust air can be sucked into the intake manifold (61), for example, via a suction ventilation system not shown in the drawing.

Figure 4 illustrates a particularly advantageous combination of the new invention. Two parallel sieves (70), (71) meshes are provided for the size classification, whereby all the fine sand and grain particles passed through them can be removed from the apparatus (1) through the outlet opening (16) or the sand outlet (20).

Two (72), (73) stone separating table surfaces are also provided for mass grading, in particular for stone selection, with a material flow-contacting surface lattice. The vibration movement exerts a strong conveying effect on the heavy fraction directly on the top and bottom (72), (73), and on the upward drought. The light fraction is lifted by the strong, evenly distributed airflow from both (72), (73) stone separator surfaces, captured, and the light fraction floats in the direction of the lower table ends at its outlet (33) or outlet (35).

An unusual design is that, of the two (72), (73) stone separating tables, the heavy material fraction of the entire material stream, for example 30-60%, is deposited on the upper (72) table separator table from the inlet plate (74) and then from the rock separator table (72). (75) to the transfer point to drop directly onto the lower (73) table separator table.

The upper (72) sludge separating surface produces only a mixture of the entire heavy fraction, which is then passed, for example, by 50% of the total material flow to the lower (73) rock separating surfaces near the top table end. The general perception of those skilled in the art that, during mass grading, near-upper feed of the material at the top end of the material automatically results in poor casting, the apparatus according to the invention can be refuted with the aid of the present invention. During the ghosts, it has been proved that the very strong layer flow indicated in the figure (76) with circulating direction provides a barely achievable choice of quality. There is a very strong upward movement in the area closer to the asphalt funnel, but the material flow moves strongly downwards.

The actual stone selection is first established only between the stone separating table surface (73) and a guide plate (77) positioned above its upper end. Due to the flow of air moving in the direction opposite to the direction of the material flow, the stones in this range are mixed with only a very small amount of grain, and can be removed from the apparatus with good efficiency through the rubber outlet (36) of the gasket.

The particular advantage of the embodiment of the device (1) according to the invention shown in Fig. 4 is that the amount of material flow in the different units can be very accurately adapted to the specific properties of the respective parts of the equipment. Since each table has a working surface of approximately the same size, the screen surface and the property-like stone separating surface doubles as the lowest (73) stone separating surface is only a portion of the entire material stream. This is a very high sifting and stone35 separation! provides high quality with high productivity.

In the embodiment shown in FIG. 5, further embodiments of the invention are illustrated in relation to the embodiment shown in FIG. Here, the lowest table surface (4) serves as a stone separator, while the above table (81) has a slightly less coarse surface, so that some of the stones move up with the small amount of granules that mix with them, and (80) fall down directly below it (4). ). The top (18) table serves above all as a layering table, and at its lower part (82) there is a tar50 collector, i.e. a recess in which all heavy fractions accumulate with the stones. The heavy fraction can be released from the collector bush (82) through a slide to the rock separator (4).

In addition to the very high percentage of precipitation, the great advantage of the described embodiment is demonstrated by the excellent separation of the individual material parts and the heavy fraction of granular food and feed through the outlet (35) and its light fraction through the outlet (33).

EN 204450 Β

The invention includes not only an apparatus 1, but also a method of separating granular food and feed intended for dry milling preparation into different fractions in a single vibration group.

The device (1) comprises a top-down size grading unit which can be constructed from arbitrary screen combinations and may comprise (15) coarse sieve (18), screen sieve (70) and (71) and preferably has a closed bottom plate (19). The size grading unit is positioned above the capitalization unit, so that both classifiers are fork-shaped or V-shaped relative to one another. The mass grader can also be formed in multiple variations, such as single and double grading tables, in which case the upper (72) is a stone separator as a table slate laminate, and the lower (73) stone separator table acts as a rock separator. The fork-shaped or V-shaped (22) is provided to guide the air flow required in the mass grading unit. It is an important idea of the invention that the material to be cleaned, from entering the apparatus (1), until it exits, is a single, wide, flat, carpet-like material stream carried out in the apparatus (1) and passed from unit to unit. In contrast to the known dry grinding preparatory devices built from individual equipment, the proposed apparatus (1) does not compress the material flow for a tubular delivery.

Claims (14)

1. An apparatus for preparing dry grinding of granular food and feed, in particular for cleaning, selecting fractions, and in particular foreign contaminants such as sand, stone, lumps, etc. having an oscillating size grading unit which is inclined relative to the horizontal plane, and a vibrating mass grading unit which is equally inclined relative to the horizontal plane, each having an upper material inlet and a lower material discharge, and means for transmitting material flow and means for generating airflow, characterized by that the size grading unit and the mass grading unit are formed as a single oscillating group, and that they are shaped like a fork or a V-shaped, wedge-shaped or valacial spacing (22) over each other, and that air flow means are provided with a fork or V-shaped air flow device. they are trained as spatial means (22). An apparatus according to claim 1, characterized in that the means for generating a low current flow has a sorting device with a bottom plate (19). The apparatus according to claim 1 or 2, characterized in that the stacking group size classification unit and the oscillating drive common to the mass grading unit. 4. Referring to 1-3. Apparatus according to any one of claims 1 to 3, characterized in that the mass grading unit is despread from two descending tables arranged by the same air flow arranged over one another. Apparatus according to claim 4, characterized in that the top grading table is formed as a collecting table (3), a lightweight granule separator or a stone separating table surface (72), while the lower grading table is formed as a rock separator (4) or a stone separating table surface (73). 6. Apparatus according to any one of claims 1 to 3, characterized in that the size classification unit consists of two identical stacking tables arranged one above the other. 7. Apparatus according to one of Claims 1 to 3, characterized in that the grading tables belonging to the same classification unit are arranged in parallel. 8. Referring to Figures 1-7. Device according to any one of claims 1 to 3, characterized in that the vibrating drive is arranged on both sides of the vibrating group in its approximately horizontal center of gravity (6). 9. Device according to any one of claims 1 to 3, characterized in that the air flow generating means comprise a suction fan connected to an enlarged side of the gap (22) between the closed bottom plate (9) and the mass grading unit. The apparatus of claim 9, characterized in that the one-side augmented space (22) is subdivided at least 30 into an upper exhaust chamber (22 ') and a lower exhaust chamber (22') and both into the upper exhaust chamber (22) and to the lower exhaust chamber (22). 22 ') adjustable air throttle valves (27,28) are assigned. 11. A9. Device according to claim 10 or 10, characterized in that the lower end of the collecting table (3) flows directly into a vertical suction duct (40) 12. Arrangement according to one of Claims 1 to 4, characterized in that the one side-wound spacing (22) is provided with air recirculation in a closed circuit through the dust separator consisting of a cyclone (50) and a dust filter (51) in the suction side of the sludge separator (4). 13. A method for preparing dry grinding of granular food and feed, in particular for cleaning, fractional selection, and in particular foreign contaminants such as sand, stone, lumps, etc. selecting at least once by size flow through material flow vibration and air flow, and then grading at least once by weight, and passing the material stream through at least a portion of the wavelength grading by size and wavelength, characterized in that the material stream is dimensioned by the size classifier in the unit opposite to the direction of travel and inclination of the material flow in the mass grading unit and from the entry of the size fractionation unit to the exit of the selected fraction from the carpet 60, spread evenly and flatly on the mat 60 EN 204450 We are going through. lag on the mass grading unit and directly above it 14. A13. A method according to claim 1, characterized in that the air flow generated for the classification is displaced in a space of 204450 Β MQ. ⁵ : Β 07 Β 7/00 cd Μ * cd LTT EN 204450 Β Int.a. ⁵ : Β 07 Β 7/00 Ο Figure 2 EN 204450 Β IntCl. ⁵ : B07B7 / 00 EN 204450 Β IntCl. ⁵ : Β07Β7 / 00 EN 204450 Β Int Cl. ⁵ : B 07 B 7/00. Published by: National Office of Invention, Budapest Publisher: dr. Gabriella Svoboda CODE