A cyclone preheating device for high temperature calcined alumina
By employing an inclined spreading plate and distribution pile structure in the cyclone preheater, combined with the design of compression springs and rotating parts, the problem of low material diffusion efficiency was solved, achieving efficient preheating and uniform heating of alumina raw materials and improving the thermal efficiency of the calcination system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG CHUANGYUAN NEW MATERIALS TECHNOLOGY CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-31
AI Technical Summary
The material spreading plate in the existing cyclone preheater results in low material diffusion efficiency, which affects the preheating efficiency.
It adopts an inclined spreading plate body and a material distribution pile structure, combined with a compression spring and rotating component design, to form a two-stage dispersion. It utilizes high-temperature airflow to achieve uniform suspension and diffusion of materials, thereby enhancing heat exchange efficiency.
This improved the preheating efficiency of alumina raw materials, reduced fuel consumption, and ensured uniform heating and a stable calcination process.
Smart Images
Figure CN224580739U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of preheater technology, specifically a cyclone preheating device for high-temperature calcined alumina. Background Technology
[0002] Alumina, also known as aluminum oxide, is a high-hardness compound with a melting point of 2054℃ and a boiling point of 2980℃. It is an ionic crystal that can ionize at high temperatures and is commonly used in the manufacture of refractory materials. Corundum in nature is the α-type, a hexagonal close-packed alumina with a high melting point, high hardness, insolubility in acids and alkalis, corrosion resistance, and good insulation properties. Calcination of α-alumina is a crucial step in the alumina production process.
[0003] Cyclone heaters are used in the calcination of alumina, primarily for preheating the material. Cyclone preheaters utilize the principle of heat exchange, allowing for thorough heat exchange between the low-temperature alumina raw material and the high-temperature calcination exhaust gas. During alumina calcination, the raw material typically needs to be heated to a high temperature for subsequent reactions. Cyclone preheaters can preheat the raw material from room temperature to a specific temperature, generally raising it to around 300℃-500℃, significantly improving the thermal efficiency of the entire calcination system and reducing fuel consumption in subsequent calcination processes. The unique internal structure and airflow design of the cyclone preheater ensure uniform heating of the alumina raw material during preheating. The raw material enters the cyclone preheater in granular or powder form and is evenly dispersed in the airflow under the action of the cyclone airflow, ensuring full contact with the high-temperature gas and preventing localized overheating or undercooling, thus laying the foundation for a stable and efficient subsequent calcination process.
[0004] The added material is fed into the duct connected to the cyclone separator. After passing through the spreading plate, it is diffused outwards. With the help of wind, the material is evenly suspended in the airflow. The airflow that drives the material diffusion is high temperature, thereby accelerating preheating. However, in existing technologies, the spreading plate is mostly separated by guide plates, which reduces the material diffusion efficiency and thus affects the preheating efficiency. Utility Model Content
[0005] To address the problem of low material distribution efficiency of the spreading plate in the sorting preheater, which affects the preheating efficiency, this utility model provides a cyclone preheating device for high-temperature calcined alumina.
[0006] This utility model is achieved through the following technical solution:
[0007] A cyclone preheating device for high-temperature calcined alumina includes a cyclone cylinder, an air duct connected to the upper part of the cyclone cylinder, a material discharge pipe connected to the air duct, and a material spreading plate assembly for dispersing materials inside the air duct; the material spreading plate assembly includes an inclined material spreading plate body, with material distribution piles evenly distributed on the upper inclined section of the material spreading plate body and material spreading holes evenly distributed on its lower inclined section.
[0008] The material distribution piles set on the material spreading plate body shield the material, accelerating its dispersion. Combined with the spreading holes, this creates a two-stage dispersion process, allowing the material to be evenly suspended in the airflow with the help of the high-temperature airflow within the duct, thus improving preheating efficiency. The inclined design of the material spreading plate body accelerates the material flow rate and prevents material from getting stuck on the plate surface. Furthermore, the evenly distributed distribution piles shield the material, accelerating its dispersion. The material passing through the distribution piles, due to its normal distribution, gathers towards the central spreading holes, allowing the material to better utilize the airflow's power for diffusion and suspension. This fully utilizes the kinetic energy of the airflow, improving its carrying and dispersion effects on the material, enhancing heat exchange efficiency, and achieving more efficient preheating.
[0009] A further improvement of this utility model is that the aforementioned material distribution pile has a variable diameter structure with a thicker upper section and a thinner lower section, and the lower section of the material distribution pile penetrates through the material spreading plate body; a compression spring is sleeved on the material distribution pile below the material spreading plate body, the upper part of the compression spring abuts against the bottom surface of the material spreading plate body, and the lower part of the compression spring abuts against the support block at the lower end of the material distribution pile. Due to the variable diameter structure of the material distribution pile, after the lower section of the material distribution pile penetrates through the material spreading plate body, it is supported by the bottom surface of the upper section of the material distribution pile and the material spreading plate body to prevent it from sliding down; under the impact of the high-temperature airflow, the material distribution pile is pushed upward, and under the action of the compression spring, the material distribution pile reciprocates on the material spreading plate body, which helps to accelerate the dispersion of materials.
[0010] A further improvement of this invention is that the aforementioned spreading plate body is provided with a sealing ring adapted to the distributing pile. This prevents problems such as jamming and wear caused by embedded material particles.
[0011] A further improvement of this utility model is that the bottom surface of the aforementioned material spreading plate body is provided with an annular support member, which surrounds the outside of the material distribution piles; a rotating member is rotatably arranged inside the support member, the top surface of the rotating member is provided with a lifting block, and the bottom surface of the rotating member is provided with a deflecting blade. The deflecting blade, under the impact of the high-temperature airflow, causes the rotating member to rotate on the support member. During the rotation, the lifting block contacts the supporting block, thus lifting the material distribution piles upwards; as the rotating member continues to rotate, the material distribution piles evenly distributed on the material spreading plate body are repeatedly lifted upwards, creating a continuous impact that disperses the passing material.
[0012] A further improvement of this invention is that the aforementioned actuating blade is generally wavy, and the actuating blade is inclined relative to the rotating component. Due to the inclined arrangement of the actuating blade relative to the rotating component, the contact area between the actuating blade and the high-temperature airflow is effectively increased.
[0013] A further improvement of this invention is that the aforementioned rotating component is horizontally arranged within the support component. The horizontally arranged rotating component is perpendicular to the upward direction of the high-temperature airflow, thus creating the optimal angle for driving the rotating component to rotate; moreover, the horizontally arranged rotating component experiences more balanced force on the support component, resulting in smoother rotation.
[0014] A further improvement of this invention is that an inclined feed plate is connected to the side of the feed plate body near the feed pipe. The inclined feed plate can buffer and guide the falling material.
[0015] A further improvement of this invention is that the feed plate is provided with spaced reinforcing ribs. These reinforcing ribs help to improve the structural strength of the feed plate and increase its impact resistance to falling materials. Simultaneously, the reinforcing ribs are perpendicular to the feed plate, with their length pointing towards the feed plate body. This arrangement of the reinforcing ribs also provides guidance for the flow direction of the material.
[0016] A further improvement of this utility model is that the top surface of the aforementioned material spreading plate body is evenly distributed with reinforcing ribs, which are located between the material distribution pile and the spreading hole. The reinforcing ribs help to improve the structural strength of the material spreading plate body; simultaneously, the reinforcing ribs are perpendicular to the material spreading plate body, and their length direction points towards the spreading hole, thus providing guidance for the flow direction of the material.
[0017] As can be seen from the above technical solution, the beneficial effects of this utility model are as follows: the material distribution piles set on the material spreading plate body form a shield for the material, accelerating the dispersion of the material, and forming a two-stage dispersion in conjunction with the material spreading holes, thereby suspending the material evenly in the airflow with the help of the high-temperature airflow in the air duct, thus improving the preheating efficiency; the inclined design of the material spreading plate body accelerates the material flow rate and avoids the material from getting stuck on the plate surface; moreover, the evenly distributed material distribution piles shield the material and accelerate its dispersion, and the material passing through the material distribution piles forms a convergence towards the material spreading holes in the center due to the normal distribution, so that the material can better diffuse and suspend with the help of the airflow, making full use of the kinetic energy of the airflow, improving the carrying and dispersion effect of the airflow on the material, improving the heat exchange efficiency, and achieving more efficient preheating. Attached Figure Description
[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.
[0020] Figure 2 This is a schematic diagram of the first structure of the bulk material plate assembly according to a specific embodiment of the present utility model.
[0021] Figure 3 This is a schematic diagram of the second structure of the bulk material plate assembly according to a specific embodiment of the present utility model.
[0022] Figure 4 This is a schematic diagram of the structure of the bulk material plate assembly without the support members in a specific embodiment of this utility model.
[0023] Figure 5 This is a schematic diagram of the first structure of the rotating component according to a specific embodiment of the present utility model.
[0024] Figure 6 This is a schematic diagram of the second structure of the rotating component according to a specific embodiment of the present invention.
[0025] In the attached diagram: 1. Cyclone; 11. Ascending pipe; 2. Air duct; 21. Spreading plate assembly; 211. Feed plate; 212. Reinforcing rib plate one; 213. Spreading plate body; 214. Dividing pile; 2141. Support block; 2142. Compression spring; 215. Reinforcing rib plate two; 216. Spreading hole; 217. Support component; 218. Rotating component; 2181. Lifting block; 2182. Actuating blade; 219. Baffle plate; 3. Discharge pipe. Detailed Implementation
[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0027] Example 1:
[0028] like Figures 1-4As shown, this utility model discloses a cyclone preheating device for high-temperature calcined alumina, including a cyclone cylinder 1. The top of the cyclone cylinder 1 is connected to an ascending pipe 11, and the upper part of the cyclone cylinder 1 is connected to an air duct 2. The air duct 2 is connected to a discharge pipe 3. A material spreading plate assembly 21 for dispersing materials is provided inside the air duct 2. The material spreading plate assembly 21 includes an inclined material spreading plate body 213. Material spreading piles 214 are evenly distributed on the upper inclined section of the material spreading plate body 213. The material spreading piles 214 have a variable diameter structure with a thicker upper section and a thinner lower section, and the lower section of the material spreading piles 214 penetrates the material spreading plate body 213. A compression spring 2142 is sleeved on the material spreading piles 214 below the material spreading plate body 213. The upper part of the compression spring 2142 abuts against the bottom surface of the material spreading plate body 213, and the lower part of the compression spring 2142 abuts against the support block 2141 at the lower end of the material spreading pile 214. Due to the variable diameter structure of the material distribution pile 214, after the lower section of the material distribution pile 214 penetrates the material spreading plate body 213, the bottom surface of the upper section of the material distribution pile 214 forms contact support with the material spreading plate body 213 to prevent it from sliding down; under the impact of the high temperature airflow, the material distribution pile 214 is pushed to move upward, and under the action of the compression spring 2142, the material distribution pile 214 forms reciprocating vibration on the material spreading plate body 213, which helps to accelerate the dispersion of materials.
[0029] The material spreading plate body 213 is equipped with a sealing ring that matches the material distribution pile 214. This is to prevent problems such as jamming and wear caused by embedded material particles.
[0030] The lower inclined section of the material spreading plate body 213 is evenly distributed with spreading holes 216. The material distribution piles 214 set on the material spreading plate body 213 shield the material, accelerate the dispersion of the material, and cooperate with the spreading holes 216 to form a two-stage dispersion. Thus, the material is evenly suspended in the airflow with the help of the high temperature airflow in the air duct 2, thereby improving the preheating efficiency. The inclined design of the material spreading plate body 213 accelerates the material flow rate and avoids the material from getting stuck on the plate surface. Moreover, the evenly distributed material distribution piles 214 shield the material and accelerate its dispersion. The material passing through the material distribution piles 214 forms a normal distribution and gathers towards the spreading holes 216 in the middle, so that the material can better diffuse and suspend with the power of the airflow, make full use of the kinetic energy of the airflow, improve the carrying and dispersion effect of the airflow on the material, improve the heat exchange efficiency, and achieve more efficient preheating.
[0031] Example 2:
[0032] like Figure 2 , Figure 5 and Figure 6As shown, the bottom surface of the material spreading plate body 213 is provided with an annular support member 217, which surrounds the outside of the material distribution pile 214; a rotating member 218 is rotatably arranged inside the support member 217, and a lifting block 2181 is provided on the top surface of the rotating member 218. There are at least three lifting blocks 2181, which are evenly distributed around the center of the rotating member 218; the bottom surface of the rotating member 218 is provided with a deflecting blade 2182. The actuating blade 2182 causes the rotating component 218 to rotate on the support component 217 under the impact of the high-temperature airflow. During the rotation, the lifting block 2181 contacts the supporting block 2141, thus lifting the material distribution pile 214 upward. As the rotating component 218 rotates continuously, the material distribution piles 214 evenly distributed on the material spreading plate body 213 are repeatedly lifted upward, forming a continuous impact to disperse the passing material. The number of at least three lifting blocks 2181 helps to increase the frequency of lifting each material distribution pile 214 upward when the rotating component 218 rotates.
[0033] The agitator blade 2182 is generally wavy and is inclined relative to the rotating component 218. Due to the inclined arrangement of the agitator blade relative to the rotating component 218, the contact area between the agitator blade 2182 and the high-temperature airflow is effectively increased.
[0034] The rotating component 218 is horizontally positioned within the support component 217. The horizontally positioned rotating component 218 is perpendicular to the upward direction of the high-temperature airflow, thus creating the optimal angle for rotating the component 218. Furthermore, the horizontally positioned rotating component 218 experiences more balanced force on the support component 217, resulting in smoother rotation. When the rotating component 218 is horizontally positioned within the support component 217, the bottom end of the initial material distribution pile 214 is flush with the horizontal plane, thus cooperating with the horizontally positioned rotating component 218.
[0035] Example 3:
[0036] like Figures 2-3 As shown, the material spreading plate body 213 is connected to an inclined feed plate 211 on the side near the feed pipe 3. The inclined feed plate 211 can buffer and guide the falling material.
[0037] The feed plate 211 is evenly distributed with spaced reinforcing ribs 212. The reinforcing ribs 212 help to improve the structural strength of the feed plate 211 and increase its impact resistance to falling materials; at the same time, the reinforcing ribs 212 are perpendicular to the feed plate 211 and their length direction points towards the material spreading plate body 213. The arrangement of the reinforcing ribs 212 can also provide guidance for the flow direction of materials.
[0038] Example 4:
[0039] like Figures 2-3 As shown, the top surface of the spreading plate body 213 is evenly distributed with reinforcing ribs 215, which are located between the material distribution pile 214 and the spreading hole 216. The reinforcing ribs 215 help improve the structural strength of the spreading plate body 213; simultaneously, the reinforcing ribs 215 are perpendicular to the spreading plate body 213, and their length direction points towards the spreading hole 216. The arrangement of these reinforcing ribs 215 also provides guidance for the flow direction of the material.
[0040] A set of opposing baffles 219 are provided on a set of opposite sides of the material spreading plate body 213. The baffles 219 are located on both sides of the material flow direction, which helps to guide the flowing material in conjunction with the two outermost reinforcing ribs 215.
[0041] This utility model discloses a cyclone preheating device for high-temperature calcined alumina. The material distribution piles on the material spreading plate body shield the material, accelerating its dispersion. Combined with the spreading holes, this forms a two-stage dispersion, allowing the material to be evenly suspended in the airflow with the help of the high-temperature airflow within the duct, thereby improving preheating efficiency. The inclined design of the material spreading plate body accelerates the material flow rate and prevents material from stagnating on the plate surface. Furthermore, the evenly distributed material distribution piles shield the material, accelerating its dispersion. The material passing through the distribution piles, due to its normal distribution, gathers towards the central spreading holes, allowing the material to better diffuse and suspend with the help of the airflow. This fully utilizes the kinetic energy of the airflow, improving its carrying and dispersion effect on the material, increasing heat exchange efficiency, and achieving more efficient preheating.
[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A cyclone preheating device for high-temperature calcined alumina, comprising a cyclone barrel (1), a wind pipe (2) communicated with the upper part of the cyclone barrel (1), a discharging pipe (3) communicated with the wind pipe (2), and a material scattering plate assembly (21) arranged in the wind pipe (2) for dispersing the material; characterized in that, The spreading plate assembly (21) includes an inclined spreading plate body (213), on which material distribution piles (214) are evenly distributed on the upper inclined section and spreading holes (216) are evenly distributed on the lower inclined section.
2. A cyclone preheating device for high temperature calcined alumina according to claim 1, characterized in that, The material distribution pile (214) penetrates the material spreading plate body (213); a compression spring (2142) is sleeved on the material distribution pile (214) below the material spreading plate body (213), the upper part of the compression spring (2142) abuts against the bottom surface of the material spreading plate body (213), and the lower part of the compression spring (2142) abuts against the support block (2141) at the lower end of the material distribution pile (214).
3. The cyclone preheating device for high-temperature calcined alumina according to claim 2, characterized in that, The bottom surface of the material spreading plate body (213) is provided with an annular support member (217), which surrounds the outside of the material distribution pile (214); a rotating member (218) is rotatably arranged inside the support member (217), the top surface of the rotating member (218) is provided with a lifting block (2181), and the bottom surface of the rotating member (218) is provided with a deflecting blade (2182).
4. The cyclone preheating device for high-temperature calcined alumina according to claim 3, characterized in that, The actuating blade (2182) is generally wavy, and the actuating blade (2182) is inclined relative to the rotating part (218).
5. A cyclone preheating device for high temperature calcined alumina according to claim 4, characterised in that, The rotating component (218) is horizontally positioned within the support component (217).
6. A cyclone preheating device for high temperature calcined alumina according to any one of claims 1 to 5, characterised in that, The material spreading plate body (213) is connected to an inclined feed plate (211) on the side near the feed pipe (3).
7. A cyclone preheating device for high temperature calcined alumina according to claim 6, characterised in that, The feed plate (211) is evenly distributed with intermittently arranged reinforcing ribs (212).
8. A cyclone preheating device for high-temperature calcined alumina according to any one of claims 1 to 5, characterized in that, The top surface of the material spreading plate body (213) is evenly distributed with reinforcing ribs (215), which are located between the material distribution pile (214) and the material spreading hole (216).