Chemical particle drying and cooling integrated device

Abstract

The application discloses a chemical particle drying and cooling integrated equipment and belongs to the technical field of chemical equipment. The equipment comprises a shell, a central transmission shaft and a rotating cone disc group. A bottom plate and a discharge port are arranged at the bottom of the shell, and a feeding port is arranged at the top cover. The side wall is a double-layer wall structure, and an annular air cavity is divided into a drying air cavity and a cooling air cavity. An annular air baffle is arranged in the shell, and the shell is divided into a drying cavity and a cooling cavity. The rotating cone disc group comprises a plurality of solid inverted cone discs which are fixed on the central transmission shaft. The large end diameter of the cone disc in the drying cavity increases layer by layer, and the large end diameter of the cone disc in the cooling cavity decreases layer by layer. An annular baffle plate is arranged below each layer of the cone disc, and a central clearance hole and an eccentric discharge hole are arranged at the bottom layer. The material forms a controllable thin layer along the cone disc guide groove under the action of centrifugal force, the radial flow through the shell wall is used for eliminating the heat transfer dead zone, and the gradient residence time self-control is realized by using the structural geometric characteristics. The application has the advantages of simple structure, reliable operation and uniform drying and cooling.

Description

Technical Field

[0001] This invention belongs to the field of chemical equipment technology, and in particular relates to an integrated drying and cooling equipment for chemical particles. Background Technology

[0002] In existing chemical granule drying equipment, vertical drying units typically rely on the natural accumulation of materials by gravity on fixed or conveyor beds. Hot air struggles to penetrate the accumulated layers, resulting in a small gas-solid contact area, large heat transfer dead zones, and poor drying uniformity. Furthermore, the drying and cooling processes are usually separated into independent units, with high-temperature materials directly entering the cooling environment from the drying environment. This sudden temperature change between the particle surface and core easily leads to thermal stress cracking and pulverization, and the equipment also occupies a large area and suffers significant heat loss. In addition, existing equipment relies heavily on mechanical valves or electrical control systems to adjust material residence time, resulting in complex structures and high failure rates. In rotary equipment, material transfer from top to bottom requires scrapers, vibration mechanisms, or chutes, leading to numerous moving parts, high energy consumption, and susceptibility to clogging. Therefore, there is an urgent need for an integrated chemical granule drying and cooling system that is structurally simple, has high heat transfer efficiency, integrates drying and cooling, and ensures reliable material transfer. Summary of the Invention

[0003] The present invention aims to at least solve the technical problems existing in the prior art, and proposes an integrated equipment for drying and cooling chemical particles.

[0004] To achieve the above-mentioned objectives of the present invention, the present invention provides an integrated chemical particle drying and cooling device, comprising a shell, a central drive shaft, and a rotating cone disk assembly; The shell is a vertical cylindrical body with a bottom plate and a discharge port on the bottom plate. The outer wall of the bottom of the shell is provided with support legs. The top of the shell is open and has a top cover with a feed port. The feed port and the discharge port are located on opposite sides of the axis of the shell. The shell sidewall has a double-wall structure, including an outer steel plate, an inner steel plate, and an annular air cavity formed between the two. The inner steel plate is densely covered with air holes. The annular air cavity is divided into an upper drying air cavity and a lower cooling air cavity by a horizontal partition. A hot air inlet is opened on the upper sidewall of the shell, and a cold air inlet is opened on the lower sidewall of the shell. The central drive shaft is coaxially arranged with the housing, and its lower end is rotatably engaged with the bottom center of the housing through a bearing, and its upper end is rotatably engaged with the center of the top cover through a bearing. The upper end of the central drive shaft extends out of the top cover and is connected to an external drive device. The rotating conical disk assembly includes multiple layers of solid inverted conical disks, each layer of the conical disks being fixedly connected to the central drive shaft from top to bottom; the large end diameter of each layer of the conical disks located in the drying chamber increases from top to bottom, and the large end diameter of each layer of the conical disks located in the cooling chamber decreases from top to bottom. The shell is provided with an annular air baffle plate. The outer edge of the annular air baffle plate is fixedly connected to the inner wall of the inner steel plate. The annular air baffle plate divides the internal space of the shell into an upper drying chamber and a lower cooling chamber. The annular air baffle plate has a central hole in the center. The central drive shaft passes through the central hole, and an annular material discharge gap is formed between the central hole and the central drive shaft. Each layer of the cone disc is provided with an annular baffle plate below it. The outer edge of the annular baffle plate is fixedly connected to the inner wall of the inner steel plate. The annular baffle plate is an inverted cone-shaped ring plate. Except for the bottom layer, the inner edge of the annular baffle plate forms an annular material dropping channel with the central drive shaft.

[0005] Optionally, the cone disc includes a hub, an upper cone panel, and an outer ring plate.

[0006] Optionally, the upper conical panel extends outward and downward from the outer edge of the hub, and the surface of the upper conical panel has multiple guide grooves in the radial direction, the depth of the guide grooves decreasing from the center to the outer edge.

[0007] Optionally, the outer ring plate is an annular vertical plate, which is vertically welded to the outer edge of the upper conical panel. The upper edge of the outer ring plate is higher than the outer edge surface of the upper conical panel, and overflow notches are evenly distributed on the upper edge of the outer ring plate.

[0008] Optionally, the annular baffle is located below the corresponding conical disc, and the inner edge of the annular baffle below the lowest conical disc in the drying chamber is located directly above the central hole of the annular air baffle.

[0009] Optionally, the bottommost annular baffle is arranged near the bottom of the housing, and a central clearance hole is provided in the center of the bottommost annular baffle. The central drive shaft passes through the central clearance hole, and a sealing ring is embedded in the inner wall of the central clearance hole. The sealing ring slides in cooperation with the outer wall of the central drive shaft. A discharge hole is provided at an eccentric position on the bottommost annular baffle, and the discharge hole communicates with the discharge port on the bottom plate.

[0010] Optionally, both the hot air inlet and the cold air inlet are equipped with air inlet valves.

[0011] The beneficial effects of this invention are as follows: the centrifugal force generated by the rotating inverted conical disc causes the material to diffuse outward along the guide groove to form a controllable thin layer. Combined with radial flow through the shell wall, this eliminates the heat transfer dead zone of the accumulated material, significantly improving gas-solid contact efficiency and drying-cooling uniformity. Utilizing the structural geometry of the gradually increasing diameter of the conical disc in the drying chamber and the gradually decreasing diameter in the cooling chamber, the material residence time can be automatically extended or shortened, achieving gradient control of the process time without the need for mechanical valves or electrical control components. The annular baffle plate divides the internal space of the shell into a drying chamber and a cooling chamber, allowing material to pass through while suppressing airflow mixing through the central material drop gap, thus achieving integrated drying and cooling within the same vertical shell. This design reduces the equipment's footprint and heat loss. The annular baffles below each conical disc catch overflowing material and guide it towards the center, ensuring orderly material transfer from top to bottom during rotation, eliminating the need for scrapers, vibration mechanisms, or guide chutes. The sealing ring in the center clearance hole of the bottom baffle slides with the central drive shaft, preventing airflow between the cooling chamber and discharge area from mixing along the outer wall of the shaft. The eccentric discharge hole connects with the bottom plate discharge port, ensuring smooth discharge of cooled material. The entire device uses solid conical discs and a solid drive shaft, eliminating dynamic sealing components, cooling water pipes, and complex electrical control systems. Its simple and compact structure ensures high operational reliability and low manufacturing and maintenance costs.

[0012] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the rotating inverted cone disk structure of the present invention.

[0014] Reference numerals: 1. Shell; 2. Top cover; 3. Outer steel plate; 4. Inner steel plate; 5. Annular air chamber; 6. Horizontal partition; 7. Drying chamber; 8. Cooling chamber; 9. Hot air inlet; 10. Cold air inlet; 11. Discharge port; 12. Central drive shaft; 13. Bearing; 14. Drive device; 15. Conical disc; 16. Upper conical panel; 17. Outer ring plate; 18. Guide groove; 19. Overflow notch; 20. Annular air baffle; 21. Annular baffle plate; 22. Support leg; 23. Feed port. Detailed Implementation

[0015] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0016] Reference Figures 1 to 3 This embodiment provides an integrated drying and cooling equipment for chemical particles, including a shell 1, a top cover 2, a central drive shaft 12, and a rotating cone disk assembly.

[0017] The shell 1 is a vertical cylindrical body with a bottom plate and a discharge port 11. Support legs 22 are located on the outer wall of the bottom of the shell 1. A top cover 2 is placed over the top opening of the shell 1, and a feed inlet 23 is located on the top cover 2. The feed inlet 23 and the discharge port 11 are located on opposite sides of the axis of the shell 1 to prevent vertical penetration and airflow short-circuiting. The sidewall of the shell 1 has a double-layer structure, consisting of an outer steel plate 3, an inner steel plate 4, and an annular air cavity 5 formed between them. The inner steel plate 4 is densely covered with circular air holes along its circumference and axial direction, and the air holes penetrate the wall thickness of the inner steel plate 4, allowing the annular air cavity 5 to communicate with the internal space of the shell 1. A horizontal partition 6 is provided inside the annular air cavity 5. The outer edge of the horizontal partition 6 is fixedly connected to the inner wall of the outer steel plate 3, and the inner edge is fixedly connected to the outer wall of the inner steel plate 4, strictly dividing the annular air cavity 5 into an upper drying air cavity and a lower cooling air cavity. A hot air inlet 9 is provided on the upper side wall of the shell 1, and the hot air inlet 9 is connected to the drying air chamber; a cold air inlet 10 is provided on the lower side wall of the shell 1, and the cold air inlet 10 is connected to the cooling air chamber; both the hot air inlet 9 and the cold air inlet 10 are equipped with air inlet valves to regulate the air inlet flow.

[0018] In this embodiment, the top cover 2 or the upper side wall of the housing 1 is also provided with an exhaust port; the lower side wall of the housing 1 is provided with a cold air outlet.

[0019] The central drive shaft 12 is coaxially arranged with the housing 1 and is a solid stepped shaft. The lower end of the central drive shaft 12 is rotatably engaged with the bottom center of the housing 1 via a bearing 13, and the upper end is rotatably engaged with the center of the top cover 2 via a bearing 13. The upper end extends out of the top cover 2 and is connected to the external drive device 14.

[0020] The rotating conical disc assembly includes multiple layers of solid inverted conical discs, each layer of conical disc 15 being fixedly connected to the central drive shaft 12 from top to bottom via a hub. The diameter of the large end of each layer of conical disc 15 located in the drying chamber increases progressively from top to bottom, while the diameter of the large end of each layer of conical disc 15 located in the cooling chamber decreases progressively from top to bottom.

[0021] An annular baffle plate 20 is provided inside the shell 1, and the outer edge of the annular baffle plate 20 is fixedly connected to the inner wall of the inner steel plate 4. The annular baffle plate 20 divides the internal space of the shell 1 into an upper drying chamber 7 and a lower cooling chamber 8. A central hole is opened in the center of the annular baffle plate 20, through which the central drive shaft 12 passes, forming an annular material drop gap between the central hole and the central drive shaft 12. This annular material drop gap allows material to fall from the drying chamber 7 to the cooling chamber 8, and at the same time, due to the limited gap width, it can effectively suppress a large amount of cross-mixing of airflow between the drying chamber 7 and the cooling chamber 8, reducing heat loss.

[0022] Each conical disc 15 is provided with an annular baffle plate 21 below it. The outer edge of the annular baffle plate 21 is fixedly connected to the inner wall of the inner steel plate 4. The annular baffle plate 21 is an inverted conical ring plate. Except for the bottom layer, the inner edge of the annular baffle plate 21 forms an annular material drop channel with the central drive shaft 12. The inner edge of this channel maintains a gap with the outer wall of the central drive shaft 12 to ensure that the rotation of the central drive shaft 12 is not interfered with while allowing the material to pass through smoothly.

[0023] In this embodiment, the conical disk 15 includes a hub, an upper conical panel 16, and an outer ring plate 17. The central hole of the hub is fixedly connected to the central drive shaft 12. The upper conical panel 16 extends outward and downward from the outer edge of the hub, forming an inverted conical working surface with a high center and low edges. Multiple guide grooves 18 are radially formed on the surface of the upper conical panel 16, extending from the center to the outer edge, with the depth decreasing from the center to the outer edge. This gradual depth structure allows the material to automatically spread into a thin layer with controllable thickness when it diffuses outward under centrifugal force, avoiding excessive accumulation of material in the central area and excessive thinness in the edge area, thereby ensuring that the radially flowing airflow can uniformly penetrate the entire material layer and eliminate heat transfer dead zones.

[0024] The outer ring plate 17 is a ring-shaped vertical plate, welded vertically to the outer edge of the upper conical panel 16. The upper edge of the outer ring plate 17 is higher than the outer edge surface of the upper conical panel 16, forming a cofferdam structure. Overflow notches 19 are evenly distributed along the upper edge of the outer ring plate 17, and the bottom of the overflow notches 19 is flush with the outer edge surface of the upper conical panel 16. When the material accumulates on the conical plate 15 to the height of the overflow notch 19, the material overflows evenly from the notch. This structure uses the material's own accumulation height to control the overflow timing, achieving quantitative and uniform material transfer without the need for mechanical valves or electrical control components, simplifying the equipment structure and improving operational reliability.

[0025] In this embodiment, the annular baffle 21 is located below the corresponding conical disc 15, receiving the material overflowing from the overflow notch 19 of the upper conical disc 15. Since the annular baffle 21 is an inverted conical ring, the material automatically slides along its inclined surface towards the center, falling from the annular discharge channel to the center of the lower conical disc 15. The inner edge of the annular baffle 21 below the lowest conical disc 15 of the drying chamber is directly above the central hole of the annular baffle 20. After falling from the inner edge of this baffle 21, the material directly passes through the annular discharge gap between the central hole of the annular baffle 20 and the central drive shaft 12, accurately falling into the center of the first conical disc 15 of the cooling chamber.

[0026] The bottommost annular baffle plate 21 is arranged near the bottom of the shell 1, and a central clearance hole is opened in its center. The central drive shaft 12 passes through the central clearance hole, and a sealing ring is embedded in the inner wall of the central clearance hole. The sealing ring slides with the outer wall of the central drive shaft 12 to prevent the airflow between the cooling chamber 8 and the discharge area at the bottom of the shell 1 from mixing along the outer wall of the central drive shaft 12. The bottommost annular baffle plate 21 has a discharge hole at an eccentric position. The discharge hole is connected to the discharge port 11 on the bottom plate through a pipeline. The cooled material is smoothly discharged through the discharge hole and the discharge port 11.

[0027] During operation, the external drive device 14 drives the central drive shaft 12 to rotate, and each layer of cone disks 15 rotates synchronously. The material enters from the feed inlet 23 on the top cover 2, falls into the center of the uppermost cone disk 15, and moves outward along the guide groove 18 under the action of centrifugal force, spreading into a uniform thin layer. Hot air enters the drying chamber from the hot air inlet 9 after being regulated by the air inlet valve, and is then radially sprayed through the air holes of the inner steel plate 4, vertically passing through the thin layer of material for drying. As the diameter of the large end of each layer of cone disks 15 in the drying chamber increases layer by layer, the centrifugal stroke and residence time of the material in each layer are automatically extended, so that the material can be fully dehydrated in the later stage of drying. The material accumulates at the outer ring plate 17, overflows from the overflow gap 19 and falls to the lower ring baffle plate 21, and then slides towards the center and falls into the next layer of cone disks 15. After passing through the annular baffle plate 20 and entering the cooling chamber 8, the material sequentially passes through each layer of the cone plate 15 in the cooling chamber. Cold air, regulated by the inlet valve, enters the cooling air chamber through the cold air inlet 10 and is then radially sprayed through the air holes to cool the material. Because the diameter of the larger end of each layer of the cone plate 15 in the cooling chamber decreases progressively, the residence time of the material in the later stages of cooling is correspondingly shortened, avoiding over-cooling. Finally, the material is discharged from the discharge hole of the bottom annular baffle plate 21 through the discharge port 11 on the bottom plate.

[0028] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An integrated drying and cooling equipment for chemical granules, characterized in that, Includes housing, central drive shaft, and rotating cone disk assembly; The shell is a vertical cylindrical body with a bottom plate and a discharge port on the bottom plate. The outer wall of the bottom of the shell is provided with support legs. The top of the shell is open and has a top cover with a feed port. The feed port and the discharge port are located on opposite sides of the axis of the shell. The shell sidewall has a double-wall structure, including an outer steel plate, an inner steel plate, and an annular air cavity formed between the two. The inner steel plate is densely covered with air holes. The annular air cavity is divided into an upper drying air cavity and a lower cooling air cavity by a horizontal partition. A hot air inlet is opened on the upper sidewall of the shell, and a cold air inlet is opened on the lower sidewall of the shell. The central drive shaft is coaxially arranged with the housing, and its lower end is rotatably engaged with the bottom center of the housing through a bearing, and its upper end is rotatably engaged with the center of the top cover through a bearing. The upper end of the central drive shaft extends out of the top cover and is connected to an external drive device. The shell is provided with an annular air baffle plate. The outer edge of the annular air baffle plate is fixedly connected to the inner wall of the inner steel plate. The annular air baffle plate divides the internal space of the shell into an upper drying chamber and a lower cooling chamber. The annular air baffle plate has a central hole in the center. The central drive shaft passes through the central hole, and an annular material discharge gap is formed between the central hole and the central drive shaft. The rotating conical disk assembly includes multiple layers of solid inverted conical disks, each layer of the conical disks being fixedly connected to the central drive shaft from top to bottom; the large end diameter of each layer of the conical disks located in the drying chamber increases from top to bottom, and the large end diameter of each layer of the conical disks located in the cooling chamber decreases from top to bottom. Each layer of the cone disc is provided with an annular baffle plate below it. The outer edge of the annular baffle plate is fixedly connected to the inner wall of the inner steel plate. The annular baffle plate is an inverted cone-shaped ring plate. Except for the bottom layer, the inner edge of the annular baffle plate forms an annular material dropping channel with the central drive shaft.

2. The integrated drying and cooling equipment for chemical particles as described in claim 1, characterized in that, The cone disc includes a hub, an upper cone panel, and an outer ring plate.

3. The integrated drying and cooling equipment for chemical particles as described in claim 2, characterized in that, The upper conical panel extends outward and downward from the outer edge of the hub, and multiple guide grooves are formed on the surface of the upper conical panel in the radial direction. The depth of the guide grooves decreases from the center to the outer edge.

4. The integrated drying and cooling equipment for chemical particles as described in claim 2, characterized in that, The outer ring plate is an annular vertical plate, which is vertically welded to the outer edge of the upper conical panel. The upper edge of the outer ring plate is higher than the outer edge surface of the upper conical panel, and overflow notches are evenly distributed on the upper edge of the outer ring plate.

5. The integrated drying and cooling equipment for chemical particles as described in claim 1, characterized in that, The annular baffle is located below the corresponding conical disc, and the inner edge of the annular baffle below the lowest conical disc in the drying chamber is directly above the central hole of the annular air baffle.

6. The integrated drying and cooling equipment for chemical particles as described in claim 1, characterized in that, The bottommost annular baffle plate is arranged near the bottom of the housing. A central clearance hole is provided in the center of the bottommost annular baffle plate. The central drive shaft passes through the central clearance hole. A sealing ring is embedded in the inner wall of the central clearance hole. The sealing ring slides in fit with the outer wall of the central drive shaft. A discharge hole is provided at an eccentric position on the bottommost annular baffle plate. The discharge hole is connected to the discharge port on the bottom plate.

7. The integrated drying and cooling equipment for chemical particles as described in claim 1, characterized in that, Both the hot air inlet and the cold air inlet are equipped with air intake valves.

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