A granulating device for preparing asphalt spherical particles by a melt method

Abstract

A granulating device for preparing asphalt spherical particles by a melt method, a horizontal displacement mechanism is arranged on a base, a hollow main shaft and a driving motor are vertically installed on the horizontal displacement mechanism, a granulating spray disc is coaxially installed on the lower end of the hollow main shaft, and the upper end is connected with the main shaft of the driving motor through a transmission pair; an electric slip ring is coaxially installed on the top end of the hollow main shaft, an electric heater and a temperature sensor are attached to the lower end surface of the granulating spray disc; a feeding chute is obliquely arranged on one side of the base opposite to the horizontal displacement mechanism, the discharge opening of the feeding chute is located above the granulating spray disc, and an electric heating plate is attached to the back of the feeding chute; and the granulating spray disc can be separated from the discharge opening by moving leftwards through the horizontal displacement mechanism. The granulating device has high heating efficiency, accurate temperature control, convenient cleaning and maintenance, and can effectively improve the forming quality of asphalt spherical particles, and is suitable for industrialized production of asphalt-based spherical activated carbon.

Description

Technical Field

[0001] This invention belongs to the field of manufacturing technology of asphalt-based spherical activated carbon, specifically relating to a granulation device for preparing asphalt spherical particles by melt method. Background Technology

[0002] Asphalt-based spherical activated carbon possesses advantages such as high sphericity, high bulk density, and excellent adsorption performance, and is widely used in environmental protection, chemical, and pharmaceutical industries. Melt asphalt rotary granulation is the core process equipment for preparing spherical asphalt particles. The principle is as follows: molten asphalt is ejected in droplet form by a rotating spray disc. As the droplets fall, they exchange heat with a refrigerant and cool, shrinking into spherical solid particles due to surface tension.

[0003] Prior art: A rotary spray granulation device is disclosed in molten asphalt rotary granulation spray disc (CN200410025815.1). The granulation spray disc of this device is heated by thermal radiation from an electric heating device below, and there is a gap of several millimeters between the non-rotating electric heating device and the rotating spray disc (see [link to previous section]). Figure 7 This gap poses a safety hazard of igniting the asphalt melt; furthermore, the complex feeding structure of the device makes it difficult to clean the residual asphalt melt and carbonized residue after shutdown. In particular, due to the characteristics of asphalt melt, a large amount of residual asphalt melt will still slowly drip onto the end face of the granulation spray plate after shutdown, causing the asphalt melt on the end face of the spray plate to continuously accumulate and solidify. Before restarting, it is difficult to melt the solidified accumulation in a short time by relying solely on the electric heating at the bottom of the spray plate, and it must be thoroughly cleaned manually, which is extremely time-consuming, labor-intensive, and unsafe.

[0004] Therefore, there is an urgent need in this field for an asphalt melt granulation device that is highly efficient in heating, precise in temperature control, uniform in feeding, and easy to maintain. Summary of the Invention

[0005] This invention provides a granulation apparatus for preparing asphalt spherical particles by melt method, thereby overcoming the shortcomings of the prior art.

[0006] The technical solution adopted in this invention is as follows: a granulation device for preparing asphalt spherical particles by melt method, comprising a base, a horizontal displacement mechanism provided on the base, a hollow main shaft and a drive motor vertically mounted on the horizontal displacement mechanism, a granulation spray disc coaxially mounted on the lower end of the hollow main shaft after passing through the base, and the upper end of the hollow main shaft connected to the main shaft of the drive motor through a transmission pair; an electric slip ring coaxially mounted on the top end of the hollow main shaft, and an electric heater and a temperature sensor attached to the lower end face of the granulation spray disc; a feed chute is inclined on one side of the base relative to the horizontal displacement mechanism, the feed chute discharge port is located above the granulation spray disc, an electric heating plate is attached to the back of the feed chute, and the granulation spray disc can be disengaged from the discharge port by moving to the left through the horizontal displacement mechanism.

[0007] Furthermore, the feed chute has a U-shaped structure, and its discharge end has an arc-shaped structure that is adapted to the periphery of the hollow main shaft. The discharge ports are symmetrically distributed on both sides of the arc-shaped structure.

[0008] Furthermore, the electric heater is a plate-shaped annular type.

[0009] Furthermore, the electric slip ring has four tracks, two of which pass through the hollow main shaft via high-temperature wires and are electrically connected to the electric heater, and the other two of which pass through the hollow main shaft via high-temperature wires and are connected to the temperature sensor.

[0010] Furthermore, the horizontal displacement mechanism includes a handle hinged to the end of the base, a pair of parallel guide rails fixed to the upper end of the base, and an inverted T-shaped mounting bracket. One end of the horizontal part of the inverted T-shaped mounting bracket is hinged to the handle, and the other end of the horizontal part is slidably connected to the pair of parallel guide rails through a pair of sliders. The hollow spindle is vertically mounted on the vertical part of the inverted T-shaped mounting bracket, and the drive motor is vertically fixed on one side of the vertical part of the inverted T-shaped mounting bracket.

[0011] Furthermore, the transmission pair includes a passive pulley fixed to the upper end of the hollow main shaft, a driving pulley fixed to the main shaft of the drive motor, and a belt wrapped around the passive pulley and the driving pulley, with the passive pulley located below the electric slip ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The granulation spraying disc and the heater are seamlessly pressed together as a whole and rotate synchronously to eliminate the gap between the existing electric heating device and the granulation spraying disc, thereby eliminating the safety hazard of igniting the asphalt melt, resulting in high safety.

[0013] 2. The granulation spray plate and heater are integrated and rotate synchronously for heating. The heat transfer efficiency is much higher than that of existing heat radiation, and the temperature of the granulation spray plate can be precisely controlled, which meets the temperature requirements of the granulation process.

[0014] 3. The feeding adopts an open arc-shaped bifurcated chute, and the asphalt melt is evenly distributed on the granulation spray plate. After the machine stops, the residual asphalt melt and carbonized residue in the feeding chute can be cleaned safely and conveniently.

[0015] 4. When stopping, the granulation spraying disc can be disengaged from the feed port by the horizontal displacement mechanism, which completely solves the problem of asphalt melt accumulation on the end face of the granulation spraying disc after stopping.

[0016] 5. It is suitable for the industrial continuous production of asphalt-based spherical activated carbon and can significantly improve the quality of finished asphalt spherical particles. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the working state structure of the present invention; Figure 2 This is a schematic diagram of the parking state structure of the present invention; Figure 3 This is a schematic diagram of the fitting structure between the feed chute discharge end and the hollow main shaft of the present invention; Figure 4 This is a schematic diagram of the feed chute structure of the present invention; Figure 5 This is a schematic diagram of the installation structure of the electric heater and temperature sensor at the bottom of the granulation spray plate of the present invention; Figure 6 This is a schematic diagram of the inverted T-shaped mounting bracket structure of the present invention; Figure 7 This is a schematic diagram of the existing technology structure. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in detail below with reference to specific embodiments.

[0019] A granulation device for preparing asphalt spherical particles by melt method includes a base 10. A horizontal displacement mechanism 3 is provided on the base 10. A hollow main shaft 9 and a drive motor 11 are vertically mounted on the horizontal displacement mechanism 3. The lower end of the hollow main shaft 9 passes through the base 10 and is coaxially mounted with a granulation spray disc 6. The upper end of the hollow main shaft 9 is connected to the main shaft of the drive motor 11 through a transmission pair 2. An electric slip ring 1 is coaxially mounted on the top end of the hollow main shaft 9. An electric heater 7 and a temperature sensor 8 are attached to the lower end face of the granulation spray disc 6. A feed chute 4 is inclined on one side of the base 10 relative to the horizontal displacement mechanism 3. The discharge port 4-1 of the feed chute 4 is located above the granulation spray disc 6. An electric heating plate 5 is attached to the back of the feed chute 4 to prevent the asphalt melt in the feed chute 4 from cooling down. The granulation spray disc 6 can be disengaged from the discharge port 4-1 by moving to the left through the horizontal displacement mechanism 3.

[0020] Specifically, the feed chute 4 is designed with an open structure, preferably a U-shaped structure, to facilitate cleaning of the feed chute 4.

[0021] Specifically, the feeding chute 4 has an arc-shaped structure 4-2 that is adapted to the periphery of the hollow main shaft 9. The feeding ports 4-1 are symmetrically distributed on both sides of the arc-shaped structure 4-2. In the working state, the feeding ports 4-1 are symmetrically distributed on both sides of the center of the granulation spray plate 6 to ensure that the asphalt melt is evenly distributed to both sides of the center of the granulation spray plate 6 by gravity.

[0022] Specifically, the temperature of the granulation spray plate 6 is monitored in real time by the temperature sensor 8 installed at the bottom; the electric heater 7 attached to the bottom of the granulation spray plate 6 is fixed to the granulation spray plate 6 and rotates synchronously, directly heating the granulation spray plate 6 by heat conduction, without heat loss, and can also ensure that the temperature of the granulation spray plate 6 is uniform.

[0023] In one embodiment, the electric heater 7 is preferably a sheet-like annular type, seamlessly pressed onto the bottom of the granulation spray disc 6 by a pressure plate. This eliminates the gap between the existing electric heating device and the rotating spray disc, thereby eliminating the safety hazard of igniting the asphalt melt.

[0024] An electric slip ring is a key electrical component in rotating equipment for transmitting power and signals. It primarily solves the problem of wire entanglement during rotation and is a well-known, universally applicable electrical component. Specifically, the electric slip ring 1 has four tracks, two of which are electrically connected to the electric heater 7 via high-temperature wires passing through the hollow main shaft 9, and the other two are electrically connected to the temperature sensor 8 via high-temperature wires passing through the hollow main shaft 9.

[0025] In one embodiment, the horizontal displacement mechanism 3 includes a handle 3-1 hinged to the end of the base 10, a pair of parallel guide rails 3-2 fixed to the upper end of the base 10, and an inverted T-shaped mounting bracket 3-3. One end of the horizontal part of the inverted T-shaped mounting bracket 3-3 is hinged to the handle 3-1, and the other end of the horizontal part is slidably connected to the pair of parallel guide rails 3-2 through a pair of sliders 3-4. The hollow main shaft 9 is vertically mounted on the vertical part of the inverted T-shaped mounting bracket 3-3, and the drive motor 11 is vertically fixed on one side of the vertical part of the inverted T-shaped mounting bracket 3-3.

[0026] In one embodiment, the transmission pair 2 includes a passive pulley 2-1 fixed to the upper end of the hollow main shaft 9, a driving pulley 2-2 fixed to the main shaft of the drive motor 11, and a belt 2-3 surrounding the passive pulley 2-1 and the driving pulley 2-2, and the passive pulley 2-1 is located below the electric slip ring 1.

[0027] In a specific application of the present invention, it is installed on the top working layer of the hollow cylindrical granulation tower via the base 10, and the specific structure of the granulation spray plate 6 is the same as that of the prior art (melting asphalt rotary granulation spray plate CN200410025815.1).

[0028] Working principle: The drive motor 11 drives the hollow main shaft 9 to rotate through the transmission pair 2, causing the granulation spray disc 6 to rotate. The speed can be adjusted by the frequency converter. After being heated and kept warm by the feed chute 4, the asphalt melt flows evenly to the upper surface of the rotating granulation spray disc 6 through the arc-shaped forked discharge port 4-1 under its own gravity. Under the action of centrifugal force, the asphalt melt is thrown out in the form of droplets from the tangential direction. After exchanging heat with the refrigerant, the droplets shrink into perfectly spherical particles. The electric heater 7 rotates synchronously with the granulation spray disc 6 and heats it. The temperature sensor 8 provides real-time feedback of the temperature signal of the granulation spray disc 6. The electronic control system adjusts the heating power to maintain the process temperature, realizing closed-loop precise temperature control.

[0029] When parking, by moving the horizontal displacement mechanism 3 outward and pulling the upper handle 3-1, the inverted T-shaped mounting bracket 3-3 moves to the left under the constraint of a pair of sliders 3-4 and a pair of parallel guide rails 3-2, causing the granulation spray disc 6 to disengage from the feed port 4-1, preventing residual asphalt melt from accumulating and solidifying on the end face of the spray disc. No manual cleaning of the spray disc end face is required before restarting, saving time and ensuring safety.

[0030] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent variations made to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A granulation apparatus for preparing asphalt spherical particles by melt method, characterized in that, Includes a base (10), on which a horizontal displacement mechanism (3) is provided. A hollow main shaft (9) and a drive motor (11) are vertically mounted on the horizontal displacement mechanism (3). The lower end of the hollow main shaft (9) passes through the base (10) and is coaxially mounted with a granulation spray disc (6). The upper end of the hollow main shaft (9) is connected to the main shaft of the drive motor (11) through a transmission pair (2). An electric slip ring (1) is coaxially mounted on the top end of the hollow main shaft (9). An electric heater (7) and a temperature sensor (8) are attached to the lower end face of the granulation spray disc (6); a feed chute (4) is inclined on one side of the base (10) relative to the horizontal displacement mechanism (3), the discharge port (4-1) of the feed chute (4) is located above the granulation spray disc (6), an electric heating plate (5) is attached to the back of the feed chute (4), and the granulation spray disc (6) can be disengaged from the discharge port (4-1) by moving to the left through the horizontal displacement mechanism (3).

2. The granulation apparatus according to claim 1, characterized in that, The feed chute (4) has a U-shaped structure, and its discharge end is an arc-shaped structure (4-2) adapted to the periphery of the hollow main shaft (9). The discharge port (4-1) is symmetrically distributed on both sides of the arc-shaped structure (4-2).

3. The granulation apparatus according to claim 1, characterized in that, The electric heater (7) is a plate-shaped ring.

4. The granulation apparatus according to claim 1, characterized in that, The electric slip ring (1) has four tracks, two of which pass through the hollow spindle (9) via high-temperature wires and are electrically connected to the electric heater (7), and the other two pass through the hollow spindle (9) via high-temperature wires and are connected to the temperature sensor (8).

5. The granulation apparatus according to claim 1, characterized in that, The horizontal displacement mechanism (3) includes a handle (3-1) hinged to the end of the base (10), a pair of parallel guide rails (3-2) fixed to the upper end of the base (10), and an inverted T-shaped mounting bracket (3-3). One end of the horizontal part of the inverted T-shaped mounting bracket (3-3) is hinged to the handle (3-1), and the other end of the horizontal part is slidably connected to the pair of parallel guide rails (3-2) through a pair of sliders (3-4). The hollow spindle (9) is vertically installed on the vertical part of the inverted T-shaped mounting bracket (3-3), and the drive motor (11) is vertically fixed on one side of the vertical part of the inverted T-shaped mounting bracket (3-3).

6. The granulation apparatus according to claim 1, characterized in that, The transmission pair (2) includes a passive pulley (2-1) fixed to the upper end of the hollow main shaft (9), an active pulley (2-2) fixed to the main shaft of the drive motor (11), and a belt (2-3) wrapped around the passive pulley (2-1) and the active pulley (2-2), and the passive pulley (2-1) is located below the electric slip ring (1).

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