A cyclone structure for ultrafine material calcination

Abstract

This utility model discloses a cyclone structure for calcining ultrafine materials, including a cyclone tube and a gas pulse device. The cyclone tube includes a volute section, a straight section, and a conical section connected and connected from top to bottom. The cone angle of the conical section is 78-82°. The gas pulse device is located outside the conical section. The conical section is provided with a pulse air hole. The air outlet of the gas pulse device is connected to a jet nozzle. The jet nozzle passes through the pulse air hole and extends into the conical section. The end of the jet nozzle located inside the conical section is bent downward. The achieved technical effects are as follows: optimizing the cone angle and appropriately reducing the semi-cone angle allows the material particles to move along a longer path, thereby increasing the separation time and enhancing the separation effect; the relatively smaller cone angle reduces the possibility of material particles hitting the wall and bouncing back into the system; after the cone angle is reduced, the cone is more slender, thus distancing the bottom discharge port from the rising vortex airflow inside the cyclone cone, thereby reducing the possibility of the recovered material being carried back into the system by the airflow; the periodically automatically activated air pulse device emits high-pressure pulse airflow, which impacts the arched material adhering to the wall through the jet nozzle, breaking up the arched material, maintaining the material's gravity-driven downward flow, and avoiding local blockage of the material conveying channel.

Description

Technical Field

[0001] This utility model relates to the technical field of cyclone separation equipment, specifically to a cyclone structure for calcining ultrafine materials. Background Technology

[0002] Existing cyclone calcination equipment generally suffers from the following key technical defects when processing ultrafine materials (such as micron-sized particles), which seriously restricts the efficient operation and industrial application of the equipment.

[0003] 1. Insufficient separation efficiency. Conventional cyclone separators achieve gas-solid separation through centrifugal force, and their separation performance mainly depends on the radial velocity gradient generated by the airflow rotation and the particle settling velocity. For ultrafine particles with a diameter of less than 10 micrometers, the existing cone angle (cyclone separators are generally set vertically, and this angle refers to the angle between the inclined surface of the cone and the horizontal plane) is generally 70-75°. The separation time is short, making it difficult for the particles to settle effectively to the wall of the separator. At this cone angle, ultrafine materials are prone to collide with the wall of the separator and bounce back into the system. The bottom discharge port is also close, and ultrafine materials are easily affected by the rising vortex airflow inside the cyclone cone and are carried back into the system by the airflow.

[0004] 2. Material Accumulation and Blockage Issues. In the conical section, ultrafine materials easily adhere to the wall, forming arched accumulations. This phenomenon disrupts the downward flow of materials due to gravity, leading to localized blockages in the material conveying channel. As the amount of retained material accumulates, the resistance within the cyclone separator continuously increases, potentially causing a shutdown.

[0005] Therefore, there is an urgent need to design a novel cyclone structure for the calcination of ultrafine materials, which combines efficient separation and anti-clogging capabilities to overcome the current technological bottlenecks. Utility Model Content

[0006] Therefore, this utility model provides a cyclone structure for calcining ultrafine materials to solve one or more of the above-mentioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A cyclone structure for calcining ultrafine materials includes a cyclone tube and a gas pulse device. The cyclone tube comprises a volute section, a straight section, and a conical section connected sequentially from top to bottom. The cone angle of the conical section is 78-82°. The gas pulse device is disposed outside the conical section. The conical section is provided with a pulse air hole. The outlet of the gas pulse device is connected to a jet nozzle. The jet nozzle passes through the pulse air hole and extends into the conical section, with one end of the jet nozzle inside the conical section bent downwards.

[0009] Furthermore, the top of the volute section is provided with a vertically upward air outlet, and the side of the volute section is provided with an air inlet extending in the tangential direction.

[0010] Furthermore, the air inlet is a pentagonal air inlet formed by a rectangle with a missing corner, and the edge of the pentagonal air inlet is provided with a pentagonal flange.

[0011] Furthermore, the cyclone also includes at least three load-bearing platforms, which are disposed on the outer side of the cyclone and are evenly distributed along the periphery of the cyclone.

[0012] Furthermore, a mounting frame is provided on the outer side of the conical section, and the air pulse device is mounted on the mounting frame.

[0013] This utility model has the following advantages:

[0014] Optimizing the cone angle and appropriately reducing the semi-cone angle allows for a longer path for material particles, thereby increasing the separation time and enhancing the separation effect. The relatively smaller cone angle reduces the possibility of material particles hitting the wall and bouncing back into the system. With a reduced cone angle, the cone becomes more slender, thus distancing the bottom outlet from the rising vortex airflow within the cyclone cone and further reducing the likelihood of recovered material being carried back into the system by the airflow. The periodically automatically activated air pulse device emits high-pressure pulsed airflow, which impacts the arched material adhering to the wall through the nozzle, breaking up the arched material and maintaining the material's downward flow due to gravity, preventing local blockage of the material conveying channel.

[0015] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0018] Figure 1 A schematic diagram of a cyclone structure for calcining ultrafine materials provided in an embodiment of this utility model;

[0019] Figure 2 This is a top view of the volute section of a cyclone separator for calcining ultrafine materials, provided as an embodiment of the present invention.

[0020] In the diagram: 1. Cyclone tube; 11. Volute section; 12. Straight section; 13. Conical section; 14. Support plate; 15. Mounting frame; 111. Air inlet; 112. Flange; 113. Air outlet; 2. Air pulse device; 21. Jet nozzle. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 and 2 As shown, this embodiment provides a cyclone structure for calcining ultrafine materials, including a cyclone cylinder 1 and an air pulse device 2.

[0023] The cyclone 1 includes a volute section 11, a straight section 12, and a conical section 13 connected sequentially from top to bottom. The cone angle of the conical section 13 is 78-82°. The conical section 13 is provided with pulse air holes.

[0024] The gas pulse device 2 is disposed outside the conical section 13. An air nozzle 21 is connected to the outlet of the gas pulse device 2. The air nozzle 21, after passing through the pulse air hole, extends into the conical section 13, and one end (inner end) of the air nozzle 21 located inside the conical section 13 is bent downwards. It should be noted that after the inner end of the air nozzle 21 is bent downwards, its air jet angle should be towards the inner wall of the conical section 13. In this embodiment, the gas pulse device 2 is periodically activated, which can be controlled by a PLC to achieve a timed activation function.

[0025] By designing the cone angle of the cone section 13 to 78-82° and appropriately reducing the half-cone angle, the path of material particles is made longer, thereby increasing the separation time and enhancing the separation effect. The relatively small cone angle reduces the possibility of material particles hitting the wall and rebounding back into the system. After the cone angle is reduced, the cone is more slender, which makes the bottom discharge port farther away from the rising vortex airflow in the cyclone cone, thereby reducing the possibility of the recovered material being carried back into the system by the airflow. The periodically automatically activated air pulse device 2 emits high-pressure pulse airflow, which impacts the arched material adhering to the wall through the jet nozzle 21, destroying the arched material, maintaining the gravity-driven downward flow of the material, and avoiding local blockage of the material conveying channel.

[0026] To achieve a more comprehensive unblocking effect, multiple pulse air holes and air pulse devices 2 can be evenly arranged around the periphery of the cone section 13. Each pulse air hole is equipped with an air nozzle 21, and each air nozzle 21 is connected to an air pulse device through a pipeline. Arched material accumulation tends to form in areas with smaller diameters, and the diameter of the cone section 13 decreases towards the bottom. Therefore, setting the pulse air holes in the upper-middle part of the cone section 13 (that is, setting the air nozzles 21 above the areas where arched material accumulation is likely to form) is sufficient to meet the unblocking requirements.

[0027] Generally, the top of the volute section 11 is provided with a vertically upward air outlet 113, and the side of the volute section 11 is provided with an air inlet 111 extending in the tangential direction. In this embodiment, the air inlet 111 is a pentagonal air inlet 111 formed by a rectangle with a missing corner, and the edge of the pentagonal air inlet 111 is provided with a pentagonal flange 112.

[0028] In this embodiment, the cyclone 1 further includes at least three load-bearing platforms 14, which are disposed on the outer side of the cyclone 1, and the plurality of load-bearing platforms 14 are evenly distributed along the periphery of the cyclone 1. By fixing the load-bearing platforms 14 to the foundation or support, the cyclone 1 can be fixed more conveniently and stably.

[0029] In this embodiment, a mounting frame 15 is provided on the outer side of the conical section 13, and the gas pulse device 2 is mounted on the mounting frame 15. This facilitates the installation of the gas pulse device 2 and brings the gas pulse device 2 closer to the conical section 13, shortening the distance between the gas pulse device 2 and the nozzle 21, reducing gas pressure loss caused by the long pipeline, and improving the gas impact arch-breaking effect.

[0030] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A cyclone structure for calcining ultrafine materials, characterized in that, The device includes a cyclone tube (1) and an air pulse device (2). The cyclone tube (1) includes a volute section (11), a straight section (12) and a conical section (13) connected and connected from top to bottom. The cone angle of the conical section (13) is 78-82°. The air pulse device (2) is located outside the conical section (13). The conical section (13) is provided with a pulse air hole. The air outlet of the air pulse device (2) is connected to a jet nozzle (21). The jet nozzle (21) is sealed through the pulse air hole and extends into the conical section (13). The end of the jet nozzle (21) located inside the conical section (13) is bent downward.

2. The cyclone structure for calcining ultrafine materials according to claim 1, characterized in that, The top of the volute section (11) is provided with a vertically upward air outlet (113), and the side of the volute section (11) is provided with an air inlet (111) extending in the tangential direction.

3. The cyclone structure for calcining ultrafine materials according to claim 2, characterized in that, The air inlet (111) is a pentagonal air inlet (111) formed by a rectangle with missing corners, and the edge of the pentagonal air inlet (111) is provided with a pentagonal flange (112).

4. The cyclone structure for calcining ultrafine materials according to claim 1, characterized in that, The cyclone tube (1) also includes at least three load-bearing platforms (14), which are arranged on the outside of the cyclone tube (1) and the plurality of load-bearing platforms (14) are evenly distributed along the periphery of the cyclone tube (1).

5. The cyclone structure for calcining ultrafine materials according to claim 1, characterized in that, An installation platform (15) is provided on the outer side of the cone section (13), and the air pulse device (2) is installed on the installation platform (15).

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