Apparatus for preparing and weighing dry ice granules for use in apparatus for mixing solid dry ice particles with a flow of gaseous medium.

Abstract

The device 1 for conditioning and metering of dry ice granules for an apparatus for mixing solid dry ice particles with a gaseous medium flow comprises a body 2 having a granule inlet section 5 and a granule discharge section 6, between which a rotating element is arranged for conveying the granules from the inlet section 5 to the discharge section 6, at least two rotating feed elements 3 are arranged parallel to one another in the body 2, a shearing member 4 is arranged between the rotating feed elements 3, and the feed elements 3 are rotationally driven to rotate counter to the passing direction of the granules from the granule inlet section 5 to the granule discharge section 6.

Description

Technical Field

[0001] The present invention relates to an apparatus for conditioning and metering dry-ice particulate matter for an apparatus for mixing solid particles of dry-ice with a stream of a gaseous medium.

Background Art

[0002] In the operation of a dry-ice washer that uses solid carbon dioxide (CO2) particulate matter known as dry-ice, dry-ice particles tend to agglomerate, so that the supply of particles from a container to a mixing system is often reduced or completely blocked. This agglomeration can grow to the size of large dry-ice clusters formed within the dry-ice container of the equipment. As used herein, a mixing system is understood to be part of a machine where dry-ice particles are mixed with a stream of a gaseous medium, typically a stream of air, and then the stream of dry-ice particles is directed into a blast gun.

[0003] Agglomeration of dry-ice particles can occur for several reasons, such as manufacturing methods, aging, poor storage conditions, operating conditions, etc. Similarly, conventional dry-ice pellet production typically produces cylindrical particles having an axial length several times the diameter of the particles, so that, for example, when the diameter of the pellet is 3 mm, the length of the pellet is typically 12 - 15 mm. This particle shape then adversely affects the quality or consistency of the supply to the mixing system. Various systems for preventing clogging of the supply port of the apparatus or the conveying rollers for removing particulate matter from the container are known in the prior art.

[0004] Irregular feeding, also known as pulsation, is a common problem in moving mixing systems using dry ice granules, and this problem is most pronounced when the granule consumption requirement is low. This pulsation is caused by the rotation of the mixing member and its molded parts. These rotating mixing members contain separate chambers or pockets filled with granules, from which the granules are conveyed by an airflow. These rotating mixing members known in the prior art are disc-shaped or cylindrical.

[0005] The above-mentioned problems are partially solved by the apparatus described in U.S. Patent Application Publication No. 2019 / 0321942(A1), which is a particle blasting apparatus comprising a metering unit, a pulverizer, and a feed unit. The metering unit and the pulverizer may each be configured to ensure uniform particle discharge. The metering unit may include a rotor that controls the particle feed rate and may have V-shaped or V-shaped pockets. The pulverizer includes at least one roller which can move between and including a position where the gap in the pulverizer is largest and a position where the gap is smallest. The metering unit can discharge in the direction toward the feed unit even without the pulverizer. The pulverizer can receive particles directly from a source of blasting medium even without the metering unit.

[0006] The apparatus described in the aforementioned document includes a single rotating roller in the metering section that rotates in one direction relative to the wiping edge on the body of the metering section. This rotating roller has V-shaped grooves and U-shaped pockets formed along its length from both ends, and these grooves and pockets converge at the center of the cylinder at apex facing in the opposite direction to the roller's rotation.

[0007] This arrangement is intended to ensure that the granular material in the grooves moves reliably along the axis, allowing for more uniform distribution of the granular material along the length of the roller. The wiping edge is then intended to prevent the granular material from being forced into the grooves. Forcing the granular material in would cause it to aggregate in the grooves, retaining it within these grooves and resulting in unwanted, irregular, and unpredictable losses of the granular material or clumps of granular material to the next stage of the apparatus. The weighing device then controls the amount of granular material supplied into the mixing system, instead of the feed or mixer itself. The feed or mixer can then operate continuously within a speed range that does not cause pulsation of the dry ice particle flow, and the amount of dry ice particles may be small, otherwise the feed element of the existing mixer, being too slow, would cause the pulsation.

[0008] As mentioned above, it is not uncommon for clumps of dry ice to form in the dry ice container in the form of clusters that, due to their size, cannot pass through the rollers of the weighing device described above. Because such clusters form, additional equipment is added to mechanically break up these clusters. However, these additional devices increase the complexity of the device and also increase its energy consumption. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] U.S. Patent Application Publication No. 2019 / 0321942(A1) [Patent Document 2] International Publication No. 2014 / 182253 [Overview of the project]

[0010] The objective of this invention is to eliminate the drawbacks of the prior art.

[0011] The aforementioned objective is achieved by the apparatus according to the present invention for the preparation and metering of dry ice granules for a device for mixing solid dry ice particles with a flow of a gaseous medium, the apparatus comprising a body having a granule injection section and a granule discharge section, between which a rotating element is positioned for conveying the granules from the injection section to the discharge section. The apparatus according to the present invention is characterized by having at least two rotating feed elements arranged parallel to each other within the body, and a shearing member positioned between the rotating feed elements. The feed elements are rotationally driven to rotate relative to each other with respect to the direction of passage of granules from the granule injection section to the granule discharge section. The rotating feed elements are formed as rotating rollers with recesses arranged around them for conveying granules. These recesses are oriented axially of the feed elements and arranged in at least two rows continuously along the length of the feed element rollers, with each of the two adjacent rows of recesses for conveying granules being offset relative to each other. The shearing member is positioned between the rotating feed elements, and the shearing member has at least one shearing edge on each roller. The position of the shear edge relative to the roller is below the height of the connection line of the rotation axis of the supply member, and includes the position of the shear edge at the height of the connection line. The angle between the connection line of the rotation axis of the supply element and the face of the shear member is between 0° and 45°. There is a gap between the roller and the shear edge, and the size of the gap is smaller than the minimum size of the granular material being conveyed.

[0012] Preferably, the apparatus for crushing dry ice granules is connected to the discharge section of an apparatus for adjusting and weighing dry ice granules, and a drive crushing roller connected to a torque source is located in the body of the apparatus for crushing dry ice granules, and a rotating support connected to a control device for rotating this support is located within the body of the apparatus parallel to the crushing roller. A second crushing roller is rotatably mounted within a rotatable body and offset from this body, continuously connected to the same torque source via a transmission and the drive crushing roller.

[0013] The present invention will be further illustrated by the drawings in the accompanying drawings.

Brief Description of the Drawings

[0014] [Figure 1] Fig. 1 shows an exploded perspective view of an apparatus for adjusting and metering dry - ice particulate matter according to the present invention. [Figure 2] Fig. 2 shows a top view of the apparatus of Fig. 1 from the side of a dry - ice container not shown. [Figure 3] Fig. 3 shows a cross - sectional view of an apparatus for adjusting and metering dry - ice particulate matter according to the present invention. [Figure 4] Fig. 4 shows an enlarged detailed view D of the cross - section of the apparatus from Fig. 3. [Figure 5] Fig. 5 shows the rotating supply elements of the apparatus according to the present invention separately. [Figure 6] Fig. 6 shows an exploded perspective view of an apparatus for pulverizing dry - ice particulate matter according to the present invention. [Figure 7] Fig. 7 shows an exploded perspective view of a separate rotating support of the apparatus of Fig. 6. [Figure 8] Fig. 8 shows a front view of a transmission on one side of the apparatus. [Figure 9] Fig. 9 shows a front view of a transmission on the other side of the apparatus. [Figure 10] Fig. 10 shows a top view of the transmission of Fig. 9. [Figure 11] Fig. 11 shows the operating stage of the apparatus of Fig. 6.

Best Mode for Carrying Out the Invention

[0015] An apparatus for adjusting and metering dry - ice particulate matter for an apparatus for mixing solid particles of dry - ice according to the present invention with a flow of a gaseous medium will be described in the following examples of embodiments with reference to Figs. 1 to 6.

[0016] In the example of the illustrated embodiment, an apparatus 1 for adjusting and metering dry - ice particulate matter includes a main body 2, in which at least two rotating supply elements 3 are arranged parallel to each other, and a shearing member 4 is arranged between the rotating supply elements 3.

[0017] The body 2 has an injection section 5 of the device 1, and granular material is supplied to the rotary supply element 3 through the injection section 5. The section 5 is on the side surface of a dry-ice container not shown, and preferably has an inclined surface for the gravity supply of the granular material to the rotary supply element 3. On the opposite side of the body 2, in this case, below the rotary supply element 3, there is a discharge section 6 of a device for guiding the granular material to a device for mixing dry-ice particles with a gaseous medium, such as the device described in International Publication No. WO 2014 / 182253 of the same applicant.

[0018] As will be described later, the discharge port portion 6 can also guide the granular material to a device 7 for adjusting the particle size of the dry-ice granular material. Then, such a device 7 for adjusting the particle size of the dry-ice granular material is positioned between the device 1 for adjusting and metering the dry-ice granular material and the device for mixing the dry-ice particles with a gaseous medium.

[0019] The body 2 may be provided so as to be attachable to the dry-ice container as the bottom of the dry-ice container, or alternatively, may be provided as a part of the dry-ice container.

[0020] The rotary supply element 3 is accommodated in the body 2 using its shaft 31 and bearings 8, and is rotationally driven to rotate relative to each other. The drive device in the illustrated example includes an electric motor 9 connected to one of the shafts 31 of the rotary supply element 3 and a transmission 10 formed by a toothed gear arranged on the shaft 31 of the rotary supply element 3. As a result, the supply elements 3 rotate relative to each other in the passing direction of the granular material from the injection section 5 to the discharge section 6 of the device 1.

[0021] In particular, as shown in Figure 1, the body 2 is formed from two connected parts. This particular example of the design of the body 2 is only one of the possible configurations of the body 2 and does not preclude other designs suitable for the apparatus 1 according to the present invention. In part of the body 2, a cavity is formed on the outside of the body 2, which serves as a transmission space 11 containing a toothed transmission device 10 located therein, and this cavity is closed by a cover 12. In another part of the body 2, a flange 13 is present on the opposite outside to connect an electric motor 9 to the shaft of one of the rotating feed elements 3. It is also not precluded to use independent drive devices for the individual rotating feed elements 3 to create suitable specific conditions for adjusting the dry ice particles, as long as the described direction of rotation remains constant. Alternatively, other suitable motors, such as pneumatic motors, may be used as drive devices instead of the electric motor 9. The transmission device 10 may also be formed by other known means other than gears.

[0022] The rotating feed element 3 is formed as a rotating roller 32 and includes recesses 33 arranged around it for conveying dry ice granules as the feed element 3 rotates. These recesses 33 are oriented axially of the feed element 3 and are arranged in at least two rows continuously along the length of the roller 32 of the feed element 3, with each of the two adjacent rows of recesses 33 for conveying granules being offset or rotated relative to each other. This arrangement is similar to a set of several adjacent gears arranged closely together on a shaft, where these gears rotate relative to each other, i.e., their teeth and spacing are not aligned with each other. This effectively provides a serrated roller 32.

[0023] In this particular embodiment of the embodiment of the supply element 3 shown in Figure 5, each roller 32 has three rows of "U" shaped recesses 33 that are offset from each other and arranged circumferentially, with each row having 10 recesses 33 and rotating relative to the recesses 33 of the row in front. With regard to manufacturing, it is preferable to provide each row of recesses 33 as a separate supply body 34, which are arranged one by one in close proximity in a row on the shaft 31 of the supply element 3 and rotate relative to each other, so that the teeth 331 and recesses 33 formed by the recesses are not aligned with each other.

[0024] The size of the recess 33, i.e., its width and depth, is selected according to the size of the dry ice granules being conveyed. As a result, the selected granules can easily fall into the recess 33, be conveyed by the recess 33, and fall freely into the discharge section 6 of the device 1.

[0025] Generally, the size, shape, number, and position of the recesses 33 can be selected according to the characteristics of the granular material being conveyed, but they must be such that the granular material can be conveyed in the required capacity.

[0026] The shearing member 4 is positioned between the rotating feed elements 3. In this embodiment, the shearing member 4 has a prism shape, and one of the sides of the prism is provided with a pair of shearing edges 41. Generally, the arrangement of the shearing edges 41 is such that each rotating feed element 3 has at least one shearing edge 41 that interacts with it. Thus, each roller 32 of the feed element 3 has at least one shearing edge 41.

[0027] In the illustrated embodiment, the shear edge 41 may be positioned relative to the roller 32 of the supply element 3 at the height of the connecting line OS of the rotation axis of the supply element 3, or slightly below that height. Therefore, the range of positions for the shear edge 41 is lower than the height of the connecting line OS of the rotation axis of the supply element 3, including the position of the shear edge 41 at the height of the connecting line OS. For clarity, the position below the connecting line OS is the position toward the discharge section 6 of the apparatus 1.

[0028] Next, the shape of the shear edge 41 itself ensures a clean shear of the pellet, allowing the remaining pellet to be transported through the next transport recess 33. For this reason, the angle γ between the connection line OS of the rotation axis of the supply element 3 and the surface 42 of the shear member 4 is in the range of 0 to 45°, and this applies to both shear edges 41.

[0029] A specific gap X exists between the roller 32 and the shear edge 41, which affects the alignment of the granular material. Generally, the dimension of the gap X is smaller than the minimum size of the granular material being conveyed, thereby preventing unadjusted granular material from passing through freely. However, in terms of operational function, the dimension of the gap X should not be zero.

[0030] The described shapes of the roller 32 and the shear edge 41 are shown in detail diagram D of Figure 4. The arrow R above the roller 32 of the supply element 3 indicates the direction of rotation of the roller 32.

[0031] Generally, the position and shape of the shearing member 4 must be such that the rotation of the roller 32 of the supply element 3 only adjusts the pellets and loads them into the conveying recess 33. Therefore, after being loaded into the recess 3, the shearing member 4 shears the portion of the pellet that protrudes from the contour of the roller 32, but it does not grip the pellets and press them against the contact walls of the roller 32 and the conveying recess 33. Otherwise, particles would unnecessarily adhere to the walls of the roller 32 and the recess 33, resulting in a loss of supply function and a simultaneous decrease in the conveying capacity of the supply element 3.

[0032] Regarding assembly, the precise connection of the components of device 1 is preferably achieved using standard fasteners with pin connections.

[0033] Apparatus 1 for preparing and supplying dry ice granules operates as follows:

[0034] From a dry ice container (not shown), dry ice granules are supplied to the injection section 5 of the apparatus 1, usually by gravity. These granules are typically cylindrical in shape, with an axial length several times greater than the diameter of the particles. The supply element 3 is rotated in opposite directions by an electric motor 9 relative to the direction of passage of the granules from the injection section 5 to the discharge section 6 of the apparatus 1. This fills the recess 33 in the cylinder 32 of the supply element 3 with the granules, which are then transported to the discharge section 6 of the apparatus 1 by the recess 33 around the shear edge 41 of the shear element 4.

[0035] At the shear edge 41, the granular material is adjusted; that is, some of the granular material protruding from the recess 33 is adjusted to a size that allows it to pass through the shear edge 41, while preventing the granular material from being unnecessarily pushed into the recess 33 and adhering to the surface of the roller 32. Granular material that does not enter the recess 33 after passing around the shear edge 41 is guided to the next recess 33. After the recess 33 has passed around the shear edge 41, the adjusted granular material falls freely into the discharge section 6 of the apparatus 1 within the batch defined by the recess 33.

[0036] In this case, clusters or clumps of dry ice granules are formed within the dry ice container by the serrated surface of the roller 32 of the supply element 3, and these are crushed during rotation, eliminating the need for any additional or other devices to crush the granule clusters as used in conventional devices. Furthermore, the shearing member 4, by its position, increases the axial distance of the roller 32, thereby increasing the working space of the roller 32. Such crushing of granule clusters proceeds smoothly without affecting the continuity of loading into the conveying recess 33, and therefore the accuracy of the amount of granules being conveyed is not affected. The device 1, designed in this way, performs the main necessary functions of adjusting and weighing granules, while also eliminating the need for the presence of other anti-clustering systems and continuously performing the function of freeing up passages for supplying granules to the dry ice container.

[0037] For completeness, the shearing member 4 may be formed in various ways, such as being fixed in place, so that it can be adjusted and fixed in a new position after the desired adjustment, or it may be implemented as a permanently rotating element. This embodiment provides the possibility of further processing of granular material. Another function of the shearing member 4 is also a safety function, which prevents foreign matter larger than the shearing gap X from being drawn into the gap between the rollers 32.

[0038] In a further example of the embodiment described below with reference to Figures 6 to 10, the apparatus 1 for preparing and weighing dry ice granules is complemented by an apparatus 7 for crushing the granules, which can further adjust or reduce the size of the weighed granules. For clarity, the apparatus 7 for crushing the granules is shown separately in Figures 6 to 10.

[0039] In this embodiment, the apparatus 7 for crushing dry ice granules is connected to the apparatus 1 for adjusting and weighing the dry ice granules to the discharge section 6, as described in the previous embodiment.

[0040] In the illustrated embodiment, the apparatus 7 for crushing dry ice granules comprises a body 71 to which a drive crushing roller 15 is rotatably mounted. In this embodiment, the crushing roller 15 is rotationally driven by an electric motor 16 connected to the shaft 151 of the roller 15 via a transmission 23. The crushing roller 15 could also be directly connected to a torque source without using the transmission 23, but such a solution is less desirable in terms of space.

[0041] The rotating support 17 is positioned within the main body 71 of the device 7, parallel to the driven grinding roller 15, and the second grinding roller 18 is mounted on the rotating support 17 so as to be rotatable, offset from the main body 17, i.e., eccentrically.

[0042] In this embodiment, the rotating support 17 is composed of circular surfaces 19, as shown separately in Figure 7, with spacing blocks 20 positioned between the circular surfaces 19, and a second grinding roller 18 is mounted rotatably adjacent to these spacing blocks 20 and offset from the support 17. The rotatable mount of the second grinding roller 18 is provided by a bearing 21 within the circular surfaces 19 in this embodiment, and the rotatable mount of the support 17 is provided by a bearing 22 within the body 71 of the apparatus 7, and in particular, according to this embodiment, within the body 71 of the apparatus 7 and within the side wall 72 of the body 71 that closes the chamber of the body 71, where the grinding roller 15 and the rotating support 17 are positioned. However, other embodiments of the body 71 having chambers for the roller 15 and body 17 that can be formed in known ways are not excluded. In the illustrated embodiment, the side wall 72 of the main body 71 serves to accommodate the rotating parts of the device 7, namely the roller 15 and the support 17, and also serves to mount the drive mechanism of the device 7, namely the electric motor 16 and the regulating electric motor 24.

[0043] The spacing block 20 has an outer surface 201 molded on the opposite side of the second grinding roller 18 to provide an inlet surface for the granular material between the grinding rollers 15 and 18. This surface 201 is located on the side of the granular material supplied from the apparatus 1 for adjusting and weighing the granular material during grinding, thereby facilitating access to the adjusted granular material between the grinding rollers 15 and 18.

[0044] The rotating support 17 is actuated by a regulating electric motor 24, typically a stepper motor, which is connected to the shaft 171 of the support 17 via a transmission 25. The support 17 can also be directly connected to the regulating device without using a transmission 23, but such a solution is less desirable in terms of space.

[0045] The transmissions 23 and 25 are located outside the side wall 72 of the main body 71 and are enclosed by the cover 26. Front views of the transmissions 23 and 25 are specifically shown in Figure 8. In this example, the transmissions 23 and 25 are formed by pairs of gears, but the transmissions 23 and 25 can also be provided in other known equivalent ways.

[0046] The head 27 is attached to the end of the shaft 171 of the support 17 to determine the zero position of the support 17. A sensor 28 for the position of the shaft 171 is then coupled to the head 27. In the illustrated embodiment, the sensor 28 is mounted on the cover 26 of the transmission devices 23, 25.

[0047] The second grinding roller 18 is rotationally driven by an electric motor 16 via a transmission 29, through the shaft 151 of the drive grinding roller 15. The transmission 29 is located outside the body 71 on the opposite side of the side wall 72. A front view of the transmission 29 is specifically shown in Figure 9, and a top view of the transmission 29 is shown in Figure 10. The transmission 29 in this example is formed by a set of gears 291, 292, 293, 294, and 295. One gear 291 is mounted on the shaft 151 of the drive grinding roller 15. Another gear 292 is mounted on the body 71 and cover 300 of the transmission 29. Another gear 293 is mounted on a second separate shaft 297, which is located within the rotation axis of the rotating support 17 but is not connected to the rotating support 17, and gear 293 is also mounted within the body 71 and cover 300 of the transmission 29. Another gear 294 is also positioned on a second separate shaft 297. Another gear 295, which is the last gear in order, is mounted on the shaft 181 of the second grinding roller 18.

[0048] The transmission device 29 could also be provided in other known equivalent ways, but it must maintain the rotational state of the drive grinding roller 15 and the second grinding roller 18 relative to each other, which in the illustrated embodiment is achieved by an odd number of gears in the transmission device 29. However, the use of gears is preferable with respect to space.

[0049] Therefore, the second grinding roller 18 is also driven by an electric motor 16, and the torque of the electric motor 16 is transmitted via a transmission device 29 to the shaft 181 of the second grinding roller 18 by the shaft 151 of the drive grinding roller 15. The second grinding roller 18 is therefore continuously driven to rotate at any position on the rotating support 17.

[0050] The gear ratios of the gears 291, 292, 293, 294, and 295 of the transmission device 29 can be selected to achieve an appropriate peripheral speed for the second grinding roller 18. The peripheral speeds of the drive grinding roller 15 and the second grinding roller 18 may be the same or different. However, for the grinding process, it is preferable that the second grinding roller 18 has a faster peripheral speed than the drive grinding roller 15.

[0051] The transmission unit 29 is enclosed by a housing 300, which, along with the main body 71 of the device 7, also serves to mount the separate shafts 296 and 297 as described above. On the outside of this cover 300, a bracket 301 for the drive unit of the device 7 is preferably mounted on the outside of this cover 300, i.e., the electric motor 16 and the regulating electric motor 24 in this example. The electric motors 16 and 24 are positioned along the main body 71 of the device 7, which is preferable in terms of space.

[0052] With regard to the design, the precise connection of the components of the device 7 is preferably achieved by standard fasteners using pin connections.

[0053] The apparatus 7 for crushing dry ice granules operates as follows, and the operating stages of the apparatus 7 are shown in Figure 11, with thick arrows indicating the direction of passage of the dry ice granules for all the operating stages shown.

[0054] In the stage where there is no granular crushing, the rotating support 17 is positioned so that the gap between the crushing rollers 15 and 18 is larger than the maximum size of the granular material used, i.e., the rotating support 17 rotates. In this stage, there is no change in the size of the granular material, and the granular material falls through the gap between the rollers 15 and 18 by gravity. This gravity fall is amplified by the rotation of the rollers 15 and 18, and the surfaces of the rollers 15 and 18 partially form passage openings for the granular material.

[0055] In the granular material grinding stage, the rotating support 17 is positioned so that the gap between the grinding rollers 15 and 18 is smaller than the maximum size of the granular material used; that is, the rotating support 17 rotates. While the size of the granular material changes at the moment of contact between the granular material and the surfaces of the rotating rollers 15 and 18, this gap is easily continuously changed by the rotation of the support 17, which is regulated by the regulating electric motor 24, i.e., a stepper motor. The second grinding roller 18 is continuously driven to rotate. The extreme position of the second stage is the position of the grinding rollers 15 and 18 when their axial distance from each other is minimized and their rotation axes are on the horizontal or shortest connecting line. This position is called the zero position, and the distance between the grinding rollers 15 and 18, as determined by the design, is the minimum feasible distance. In the illustrated embodiment, a change in fragment size below this value is not possible. However, this zero position can instead be set at a greater distance between rollers 15 and 18, at which distance granular pulverization may still occur, but the size of the pulverized granules is considered to be as small as possible for a given apparatus.

Claims

1. An apparatus (1) for preparing and weighing dry ice granules for a apparatus for mixing solid dry ice particles with a flow of a gaseous medium, comprising a body (2) having a granule injection section (5) and a granule discharge section (6), between which a rotating element is disposed for transporting the dry ice granules from the granule injection section (5) to the granule discharge section (6), and having at least two rotating supply elements (3) arranged parallel to each other within the body (2), the rotating supply elements (3) being rotationally driven to rotate relative to each other with respect to the direction of passage of the dry ice granules from the granule injection section (5) to the granule discharge section (6), the rotating supply elements (3) being formed as rotating rollers (32) having recesses (33) arranged around them for transporting the dry ice granules, these recesses (33) being oriented axially with respect to the rotating supply elements (3), and a shearing member (4) being disposed between the rotating supply elements (3), in the apparatus (1), The shearing members (4) are arranged in at least two rows in a continuous fashion along the length of the rotating rollers (32) of the rotating supply element (3), and the recesses (33) of each pair of adjacent rows for conveying the dry ice granules are offset from each other, and the shearing members (4) have at least one shearing edge (41) toward each rotating roller (32), and the position of the shearing edge (41) toward the rotating roller (32) is at the height of the connecting line (OS) of the rotation axis of the rotating supply element (3). The apparatus (1) is characterized in that it is in a range below and includes the position of the shear edge (41) at the height of the connecting line (OS), the angle (γ) between the connecting line (OS) of the rotation axis of the rotating supply element (3) and the surface (42) of the shear member (4) is between 0° and 45°, there is a gap (X) between the rotating roller (32) and the shear edge (41), and the size of the gap (X) is smaller than the minimum size of the dry ice granules being conveyed.

2. The apparatus according to claim 1, wherein the apparatus (7) for crushing dry ice granules is connected to the granule discharge section (6) of the apparatus (1), a drive crushing roller (15) connected to a torque source is mounted on the main body (71) of the apparatus (7) for crushing dry ice granules, a rotating support (17) connected to an adjustment device for rotating the rotating support (17) is arranged within the main body (71) of the apparatus (7) parallel to the drive crushing roller (15), and a second crushing roller (18) is rotatably mounted within the rotatable support (17), offset from the main body (17) and continuously connected to the same torque source via a transmission device (29) and the drive crushing roller (15).

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