Slag granulator

Abstract

The invention provides a slag granulator which comprises a revolving cup, a coupler, a motor, a feeding cup and a cooling ring, the revolving cup comprises a top opening and a bottom opening, the bottom opening is larger than the top opening, the coupler is fixed to the inner side wall of the revolving cup, and a preset distance is formed between the coupler and the top opening of the revolving cup; the motor comprises a motor body and a motor rotor installed on the motor body, the head of the motor rotor is fixedly connected with the coupler, the feeding cup is arranged in a top opening of the rotating cup and is in rotating sealing connection with the rotating cup, a feeding port is further formed in the lower portion of the side wall of the feeding cup, and a preset distance is formed between the feeding port and the inner side wall of the rotating cup. The cooling ring is located under the rotating cup and sprays atomized water or cooling air to cool the granulated slag. According to the slag granulator, the slag treatment capacity can be improved, abrasion of the inner wall of the rotating cup is reduced, the reliability of equipment is improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of high-viscosity liquid slag granulation and relates to a slag granulator. Background Art

[0002] China's steel industry consumes approximately 600 million tons of standard coal annually, accounting for 10%-15% of the nation's total energy consumption. Blast furnace ironmaking accounts for 60%-70% of the industry's total energy consumption, while slag heat contributes approximately 5%-10% of the total blast furnace energy consumption. Blast furnace slag, typically tapped at temperatures around 1400°C-1600°C, carries a significant amount of high-grade sensible heat (60kg of standard coal per ton of slag), making it the largest untapped source of high-temperature waste heat for recycling. Its recovery can reduce steel mill fuel consumption and electricity costs, directly lowering production costs. Furthermore, blast furnace slag can be used as a substitute for cement clinker, enabling waste recycling. As a cement additive, the activity of blast furnace slag is crucial, directly impacting cement strength. To achieve optimal activity, blast furnace slag must be supercooled to below its deformation temperature (900°C) to achieve vitrification (i.e., more than 95% of the blast furnace slag is in the form of glass).

[0003] At present, the main methods for treating slag are water quenching, air quenching and mechanical granulation dry cooling.

[0004] Water quenching is the most commonly used cooling method, involving pouring high-temperature slag directly into a large volume of cooling water for rapid cooling. This method requires large quantities of water (the water-to-slag weight ratio is 8:1), resulting in significant latent heat losses. While circulating cooling and reuse can save some water resources, it increases plant electricity consumption, results in low thermal quality, high impurity content, and heat discharge to the atmosphere. Furthermore, after dehydration, the slag still has a moisture content of 10%-12%, requiring further drying, which consumes 100 kWh / ton of energy. Furthermore, the open-loop process produces a strong sulfur odor and requires 1 cubic meter of fresh water for every ton of slag processed. Using a closed-loop process would incur significant investment.

[0005] The wind quenching method uses high-speed airflow to atomize slag. Due to the high viscosity of the slag, this method consumes a lot of energy, and the airflow granulation effect is unstable, resulting in large particles and difficulty in quickly cooling them to form a vitreous body, which significantly reduces the application value of the resource.

[0006] Mechanical granulation and dry cooling have garnered widespread attention in recent years. The most critical process involves dispersing and granulating the high-temperature slag into tiny particles approximately 3 mm in diameter. This allows for rapid cooling in the subsequent dry cooling process, recovering high-quality heat, and forming vitrified solid particles that can be recycled as resources. The granulator, a key component of this technical solution, draws high-temperature slag into a high-speed rotating cup, where centrifugal force ejects the slag and atomizes it into tiny particles. The cup-type granulator is particularly popular due to its simple structure, easy operation, excellent granulation quality, and low energy consumption.

[0007] However, the existing cup granulator still has the following problems:

[0008] 1. The rotor dynamic structure is unreasonable. At the feed port of the rotor, the rotor will be subjected to the impact force of the incoming slag, causing rotor dynamic imbalance. In addition, due to the high viscosity of the slag, after the slag enters the rotor, it is easy to form a thick adhesion layer on the inner wall surface of the rotor, resulting in changes in mass distribution, further causing rotor dynamic imbalance. In addition, the motor is arranged away from one side of the rotor due to high temperature, and the rotor has a single-arm support structure. The center of gravity of the rotor and its moving parts is located outside the support point, resulting in low critical speed, easy resonance, and large vibration problems, which makes the equipment unstable and short in service life.

[0009] 2. The rotor of existing cup granulators features an open-top design, meaning slag enters through the top and is ejected as the cup rotates. The slag has a high density and viscosity, and gravity acts downward on the slag. The combined effects of gravity and centrifugal force, along with the rotor's dynamic structure and speed, limit the outer diameter of the cup. To meet the required particle size, the slag flow rate is significantly restricted, resulting in low processing capacity and an inability to meet the needs of large-scale industrial slag processing.

[0010] 3. The temperature of the slag is usually above 1400℃. Long-term high temperature impact and high-speed rotation can easily cause heat damage and wear on the surface of the rotor, thereby reducing the service life of the equipment.

[0011] The above problems have prevented the mechanical granulation dry cooling method from being applied on a large scale in industry.

[0012] Therefore, how to provide a slag granulator to improve the slag processing capacity, reduce the wear of the inner wall of the rotor, strengthen the cooling of components and improve the stability of the rotor, improve the reliability and service life of the equipment, and achieve energy saving and environmental protection has become an important problem that needs to be solved urgently by technical personnel in this field.

[0013] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art. Summary of the Invention

[0014] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a slag granulator to solve the problems of weak slag processing ability, easy wear of the inner wall of the rotor cup, poor equipment reliability and short service life in the prior art.

[0015] To achieve the above and other related objectives, the present invention provides a slag granulator, comprising:

[0016] The rotating cup has a top opening and a bottom opening, wherein the bottom opening is larger than the top opening;

[0017] A coupling is fixed to the inner side wall of the rotor cup, and a preset distance is provided between the coupling and the top opening;

[0018] The motor comprises a motor body and a motor rotor mounted on the motor body, wherein the head of the motor rotor is fixedly connected to the coupling;

[0019] A feeding cup is disposed in the top opening, the feeding cup is rotatably and sealedly connected to the rotating cup, a feeding port is further provided at the lower portion of the side wall of the feeding cup, and a preset distance is provided between the feeding port and the inner side wall of the rotating cup;

[0020] A cooling ring is arranged directly below the rotor cup, and the top of the cooling ring is provided with at least one nozzle for spraying atomized water or cooling air at a predetermined angle toward the outside of the rotor cup to cool the slag thrown out from the bottom of the rotor cup.

[0021] Optionally, the coupling includes a connecting bracket and a circular cover portion, the connecting bracket is fixed on the inner side wall of the rotor cup, the circular cover portion is fixed to the lower surface of the connecting bracket, a downwardly protruding and extending engaging portion is provided at the center of the circular cover portion, the engaging portion is fixedly connected to the head of the motor rotor, the central axis of the engaging portion coincides with the central axis of the circular cover portion, the outer edge of the circular cover portion is provided with a downwardly extending extending portion, the extending portion surrounds the engaging portion to form a protective tube, the lower surface of the protective tube is lower than the upper surface of the motor body, and the motor body and the inner side wall of the protective tube are spaced a preset distance apart.

[0022] Optionally, it further includes a motor box with a top opening, the motor body is accommodated in the motor box, the upper surface of the side wall of the motor box is higher than the lower surface of the protective tube, and the motor box and the inner side wall of the protective tube are spaced a preset distance apart.

[0023] Optionally, the motor box is cylindrical, and the inner wall of the motor box is covered with an insulation layer, the insulation layer is spaced a preset distance from the motor body, and the bottom of the motor box is provided with at least one air inlet for blowing air into the gap between the motor box and the motor body.

[0024] Optionally, the rotor cup, the coupling and the motor rotor constitute a rotating assembly, and the overall center of gravity of the rotating assembly is arranged between the bearings on both sides of the motor rotor.

[0025] Optionally, the feeding cup includes an upper cup body, a lower cup body and a cup bottom connected in sequence, a dynamic sealing structure is provided between the outer wall of the upper cup body and the inner wall of the rotating cup, the feeding direction of the feed port forms a preset angle with the lower cup body, and the center top surface of the cup bottom is higher than the edge top surface of the cup bottom.

[0026] Optionally, the dynamic sealing structure includes a labyrinth sealing structure, which includes an annular dynamic ring sealing tooth and an annular static ring sealing tooth. The annular dynamic ring sealing tooth is arranged on the inner wall of the rotating cup, and the annular static ring sealing tooth is arranged on the outer wall of the upper cup body. The annular dynamic ring sealing teeth and the annular static ring sealing teeth are arranged in an alternating non-contact manner to form a cutoff gap and an expansion chamber. The cutoff gap and the expansion chamber constitute a labyrinth-type annular air gap.

[0027] Optionally, the opening shape of the feed port includes one of a rectangle, a square, a triangle, a circle or an ellipse.

[0028] Optionally, the maximum distance between the feed port and the inner side wall of the rotor cup does not exceed 8 mm.

[0029] As described above, the present invention provides a slag granulator comprising a rotor, a coupling, a motor, a feeding cup, and a cooling ring, wherein the rotor comprises a top opening and a bottom opening, wherein the bottom opening is larger than the top opening, the coupling is fixed to the inner side wall of the rotor and has a preset distance from the top opening of the rotor, the motor comprises a motor body and a motor rotor mounted on the motor body, the head of the motor rotor is fixedly connected to the coupling, the feeding cup is disposed within the top opening of the rotor cup and forms a rotating seal connection with the rotor cup, the feeding cup is further provided with a feed port at the lower portion of the side wall thereof, the feed port being spaced a preset distance from the inner side wall of the rotor, and the cooling ring is located directly below the rotor cup and sprays atomized water or cooling air to cool the granulated slag. The slag granulator of the present invention can improve the slag processing capacity, reduce wear on the inner wall of the rotor cup, strengthen the cooling of components, and improve the stability of the rotor, thereby improving the reliability and service life of the equipment and achieving energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Shown is a schematic structural diagram of the slag granulator of the present invention.

[0031] Description of Reference Numerals

[0032] 1 Rotating cup

[0033] 2 Coupling

[0034] 201 Connecting bracket

[0035] 202 dome

[0036] 203 Chimeric part

[0037] 204 protective tube

[0038] 3 Motor

[0039] 301 motor body

[0040] 302 motor rotor

[0041] 4 feeding cups

[0042] 401 Feed Inlet

[0043] 402 upper cup body

[0044] 403 lower cup body

[0045] 404 cup bottom

[0046] 5 Cooling ring

[0047] 6 nozzles

[0048] 7 Motor box

[0049] 8 air inlet

[0050] 9 Dynamic sealing structure

[0051] 901 annular dynamic seal gear

[0052] 902 Annular Stationary Ring Seal Teeth

[0053] 10 Slag droplets DETAILED DESCRIPTION

[0054] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0055] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components.

[0056] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0057] For example, when describing the embodiments of the present invention, schematic diagrams illustrating device structures may be partially enlarged for ease of explanation. These schematic diagrams are merely illustrative and should not limit the scope of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0058] For convenience, spatially relative terms such as "under," "below," "below," "below," "above," and "on" may be used herein to describe the relationship of one element or feature to other elements or features shown in the drawings. It will be understood that these spatially relative terms are intended to encompass orientations of the device in use or operation in addition to the orientation depicted in the drawings. Additionally, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

[0059] In the context of the present application, a structure described as a first feature being "above" a second feature may include embodiments where the first and second features are in direct contact, and may also include embodiments where additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0060] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0061] See also Figure 1 , which is a schematic structural diagram of the slag granulator of the present invention, the slag granulator includes a rotor cup 1, a coupling 2, a motor 3, a feeding cup 4 and a cooling ring 5, wherein the rotor cup 1 has a top opening and a bottom opening, the bottom opening is larger than the top opening, the coupling 2 is fixed to the inner side wall of the rotor cup 1, and there is a preset distance between the coupling 2 and the top opening, the motor 3 includes a motor body 301 and a motor rotor 302 mounted on the motor body 301, the head of the motor rotor 302 is connected to the The coupling 2 is fixedly connected, the feeding cup 4 is arranged in the top opening, and the feeding cup 4 is rotatably sealed and connected to the rotor cup 1. A feeding port 401 is also provided at the lower part of the side wall of the feeding cup 4, and a preset distance is provided between the feeding port 401 and the inner wall of the rotor cup 1. The cooling ring 5 is arranged directly below the rotor cup 1, and at least one nozzle 6 is provided on the top of the cooling ring 5 for spraying atomized water or cooling air at a predetermined angle to the outside of the rotor cup 1 to cool the slag thrown out from the bottom of the rotor cup 1.

[0062] Specifically, when the slag granulator is working, the motor 3 rotates the motor rotor 302 to drive the coupling 2 to rotate, and the coupling 2 drives the rotor cup 1 to rotate through the connecting bracket 201. After the slag liquid enters the feeding cup 4, it enters the rotor cup 1 from the feeding port 401. Figure 1The middle dotted arrow indicates the flow path of the slag liquid. Under the combined action of gravity and the centrifugal force generated by the rotation of the rotor cup 1, the slag liquid makes a spiral motion downward along the inner wall of the rotor cup 1. Due to the viscous force, the high-viscosity slag liquid forms a dynamic film on the inner wall of the rotor cup 1. The closer the dynamic film is to the bottom opening of the rotor cup 1, the thinner its thickness is, until it is less than 3 mm. Finally, the dynamic film breaks at the edge of the bottom opening of the rotor cup 1 and then disperses into slag droplets 10, which are thrown out of the rotor cup 1 in the horizontal direction. In the above process, the gravity of the slag liquid is downward, and the inner wall of the rotor cup 1 will not be affected by the gravity of the slag liquid, thereby reducing the thermal shock and wear of the high-temperature, high-density, and high-viscosity slag liquid on the inner wall of the rotor cup 1. In addition, the slag liquid entering the feeding cup 4 flows into the inner side of the rotor cup 1 along the radial direction of the feeding cup 4 (i.e., flows out of the feed port 401 at a nearly horizontal angle) under the action of surface tension, so that the slag liquid can be evenly distributed on the inner wall of the rotor cup 1, and will not generate unbalanced force on the motor rotor 302, which can improve the stability of the rotation of the slag granulator. Furthermore, the dynamic sealing structure 9 between the rotor cup 1 and the feeding cup 4 is located at the upper part of the rotor cup 1. The gravity of the feeding cup 4 and the slag liquid inside the feeding cup 4 is more conducive to sealing the slag liquid. In this embodiment, the rotation direction of the rotor cup 1 is counterclockwise. Figure 1 The middle arrow A indicates the rotation direction of the rotor cup 1 . In other embodiments, the rotation direction of the rotor cup 1 may also be clockwise.

[0063] Furthermore, when the slag granulator throws out the slag droplets 10, the nozzles 6 on the cooling ring 5 will spray atomized water or cooling air toward the outside of the rotor cup 1 at a preset angle a. Figure 1Arrow B in the figure indicates the flow trajectory of atomized water or cooling air within the cooling ring 5. The preset angle a refers to the angle between the ejection direction of the nozzle 6 and the horizontal direction, and the range of the preset angle a is 0° < a ≤ 90°. This is because the slag droplets 10 are ejected from the spinning cup 1 in the horizontal direction. The nozzle 6 ejects outward at the predetermined angle a, which can ensure an intersection between the path of the atomized water or cooling air and the ejection path of the slag droplets 10. Through the intersection of their paths, the atomized water or cooling air can collide with the slag droplets 10 ejected by the spinning cup 1, thereby prompting the slag droplets 10 to continue to break and form smaller particles. During this process, the atomized water or cooling air will simultaneously conduct preliminary cooling on the slag droplets 10, accelerating the formation of their surface hard shells to prevent the slag droplets 10 from sticking together when they collide with each other. In addition, the upward airflow generated when the atomized water or cooling air intersects with the slag droplets 10 can also blow the slag droplets 10 upward, which can extend the residence time of the slag droplets 10 in the air, thereby promoting the vitrification process of the slag droplets 10. In this embodiment, the preset angle a can be 20°, 30°, 45°, 65°, 70° or 80°.

[0064] As an example, the coupling 2 includes a connecting bracket 201 and a round cover part 202. The connecting bracket 201 is fixed on the inner side wall of the spinning cup 1. The round cover part 202 is fixed on the lower surface of the connecting bracket 201. A fitting part 203 protruding downward is provided at the center of the round cover part 202. The fitting part 203 is fixedly connected to the head of the motor rotor 302. The central axis of the fitting part 203 coincides with the central axis of the round cover part 202. The outer edge of the round cover part 202 has an extension part extending downward. The extension part surrounds the periphery of the fitting part 203 to form a protective cylinder 204. The lower surface of the protective cylinder 204 is lower than the upper surface of the motor main body 301. A preset distance is provided between the motor main body 301 and the inner side wall of the protective cylinder 204.

[0065] As an example, it further includes a motor box 7 with an open top. The motor main body 301 is accommodated in the motor box 7. The upper surface of the side wall of the motor box 7 is higher than the lower surface of the protective cylinder 204. A preset distance is provided between the motor box 7 and the inner side wall of the protective cylinder 204. The protective cylinder 204 can prevent the molten slag liquid inside the spinning cup 1 from contacting the motor 3 and the motor box 7, so as to ensure the normal operation of the slag granulator.

[0066] As an example, the motor box 7 is cylindrical, and the inner wall of the motor box 7 is covered with a heat-insulating layer. The heat-insulating layer is spaced a preset distance from the motor body 301. The bottom of the motor box 7 is provided with at least one air inlet 8 for blowing air into the gap between the motor box 7 and the motor body 301. Since the dynamic film on the inner wall of the rotor cup 1 is composed of high-temperature slag liquid, the temperature inside the rotor cup 1 is relatively high. The motor box 7 is located inside the rotor cup 1. The presence of the heat-insulating layer can prevent the high temperature of the dynamic film from being transferred to the motor 3 to ensure that the motor 3 is not affected by the high temperature. In this embodiment, a heat-proof radiation material film is also provided between the heat-insulating layer and the motor box 7, which can further enhance the blocking effect against high temperature to ensure the normal operation of the motor 3. Furthermore, the air inlet 8 is used to introduce cooling gas into the motor box 7. The cooling gas flows upward along the gap between the motor 3 and the motor box 7, and is then discharged through the annular gap between the motor box 7 and the protective cylinder 204. Figure 1 The middle arrow C indicates the flow path of the cooling gas. In this way, the cooling gas can promptly remove the heat generated by the operation of the motor 3 and the heat of the slag liquid on the inner wall of the rotor cup 1, thereby reducing the operating temperature of the motor 3 and ensuring that the motor 3 operates at the rated temperature.

[0067] As an example, the rotor cup 1, the coupling 2, and the motor rotor 302 constitute a rotating assembly. The rotating assembly's overall center of gravity is located between the bearings on either side of the motor rotor 302 (the shafts are located within the motor 3). The rotor cup 1, the coupling 2, and the motor rotor 302 all rotate during operation, thus forming the rotating assembly. Placing the rotating assembly's overall center of gravity between the bearings on either side of the motor rotor 302 reduces the risk of rotational resonance and the vibration level of the motor rotor 302, making the high-speed rotation of the motor 3 more stable and reliable, thereby extending the service life of the equipment. Furthermore, this design increases the rotational speed of the rotor cup 1, thereby dispersing the slag droplets 10 into smaller sizes, increasing the slag flow rate of the slag granulator and improving its slag processing capacity. This provides a certain degree of flow redundancy, effectively addressing transient increases in slag liquid flow caused by unstable flow.

[0068] As an example, the feeding cup 4 includes an upper cup body 402, a lower cup body 403 and a cup bottom 404 connected in sequence, and a dynamic sealing structure 9 is provided between the outer wall of the upper cup body 402 and the inner wall of the rotor cup 1. The feeding direction of the feed port 401 forms a preset angle with the lower cup body 403, and the central top surface of the cup bottom 404 is higher than the edge top surface of the cup bottom 404, so that the slag liquid can be more easily gathered in front of the feed port 401, thereby accelerating the flow rate of the slag liquid entering the rotor cup 1. In this embodiment, the preset angle between the feeding direction of the feed port 401 and the lower cup body 403 is 90 degrees, that is, the slag liquid flows from the feed port 401 into the rotor cup 1 at an angle parallel to the horizontal plane, so that the slag liquid is brought in along the wall of the rotor cup 1.

[0069] As an example, the dynamic sealing structure 9 includes a labyrinth sealing structure, which includes an annular dynamic ring sealing tooth 901 and an annular static ring sealing tooth 902. The annular dynamic ring sealing tooth 901 is arranged on the inner wall of the rotor cup 1, and the annular static ring sealing tooth 902 is arranged on the outer wall of the upper cup body 402. The annular dynamic ring sealing tooth 901 and the annular static ring sealing tooth 902 are arranged in an alternating non-contact manner to form a cutoff gap and an expansion chamber. The cutoff gap and the expansion chamber form a labyrinth-shaped annular air gap. When the rotor cup 1 rotates at high speed, the feeding cup 4 remains stationary. The labyrinth sealing structure can prevent the slag liquid inside the rotor cup 1 from flowing out through the labyrinth-shaped annular air gap between the annular dynamic ring sealing tooth 901 and the annular static ring sealing tooth 902.

[0070] As an example, the opening shape of the feed port 401 includes one of a rectangle, a square, a triangle, a circle or an ellipse, and the number of the feed ports 401 is multiple, and the multiple feed ports 401 are evenly arranged on the feeding cup 4 along the circumference. In this embodiment, the opening shape of the feed port 401 is a rectangle. In other embodiments, the opening shape of the feed port 401 can also be other suitable shapes, and no excessive restrictions are made here.

[0071] As an example, the maximum distance between the feed port 401 and the inner side wall of the rotor cup 1 does not exceed 8 mm. For example, the distance between the feed port 401 and the inner side wall of the rotor cup 1 is 3 mm, 4 mm, 5 mm, 6 mm or 7 mm, so that there is a certain gap between the lower cup body 403 and the rotor cup 1, ensuring that the slag liquid can flow out of the feed port 401 at a nearly horizontal angle. In this embodiment, the distance between the feed port 401 and the inner side wall of the rotor cup 1 is preferably 5 mm.

[0072] As an example, the cooling ring 5 is further provided with an annular cavity (not shown in the figure), and the top of the annular cavity is connected to the nozzle 6. After the atomized water or cooling air enters the annular cavity, it is sprayed toward the outside of the rotor cup through the nozzle 6. In one embodiment, the nozzle 6 connected to the top of the annular cavity is an annular opening. In another embodiment, the nozzle 6 connected to the top of the annular cavity can also be a number of independent small holes. Among them, the annular cavity provides a transmission path for the atomized water or cooling air in the cooling ring 5. In other embodiments, the cooling ring 5 can also use other suitable components to prepare a transmission path for transmitting the atomized water or cooling air to the nozzle 6.

[0073] In summary, the slag granulator of the present invention includes a rotor, a coupling, a motor, a feeding cup, and a cooling ring. The rotor includes a top opening and a bottom opening, wherein the bottom opening is larger than the top opening. The coupling is fixed to the inner side wall of the rotor and has a preset distance from the top opening of the rotor. The motor includes a motor body and a motor rotor mounted on the motor body. The head of the motor rotor is fixedly connected to the coupling. The feeding cup is arranged in the top opening of the rotor and forms a rotating seal connection with the rotor. The lower portion of the side wall of the feeding cup is also provided with a feed port, which has a preset distance between the feed port and the inner side wall of the rotor. The cooling ring is located directly below the rotor and sprays atomized water or cooling air to cool the granulated slag. The slag granulator of the present invention can improve the slag processing capacity, reduce the wear of the inner wall of the rotor, strengthen the cooling of components and improve the stability of the rotor, thereby improving the reliability and service life of the equipment and achieving energy conservation and environmental protection. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial utilization value.

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A slag granulator, characterized in that: include: The rotating cup has a top opening and a bottom opening, wherein the bottom opening is larger than the top opening; A coupling is fixed to the inner side wall of the rotor cup, and a preset distance is provided between the coupling and the top opening; The motor comprises a motor body and a motor rotor mounted on the motor body, wherein the head of the motor rotor is fixedly connected to the coupling; A feeding cup is disposed in the top opening, the feeding cup is rotatably and sealedly connected to the rotating cup, a feeding port is further provided at the lower portion of the side wall of the feeding cup, and a preset distance is provided between the feeding port and the inner side wall of the rotating cup; A cooling ring is arranged directly below the rotor cup, and the top of the cooling ring is provided with at least one nozzle for spraying atomized water or cooling air at a predetermined angle toward the outside of the rotor cup to cool the slag thrown out from the bottom of the rotor cup.

2. The slag granulator according to claim 1, characterized in that: The coupling includes a connecting bracket and a circular cover portion, the connecting bracket is fixed on the inner side wall of the rotor cup, the circular cover portion is fixed on the lower surface of the connecting bracket, a downwardly protruding engaging portion is provided at the center of the circular cover portion, the engaging portion is fixedly connected to the head of the motor rotor, the central axis of the engaging portion coincides with the central axis of the circular cover portion, an outer edge of the circular cover portion is provided with a downwardly extending extending portion, the extending portion surrounds the engaging portion to form a protective tube, the lower surface of the protective tube is lower than the upper surface of the motor body, and the motor body and the inner side wall of the protective tube are spaced a preset distance apart.

3. The slag granulator according to claim 2, characterized in that: It also includes a motor box with a top opening, the motor body is accommodated in the motor box, the upper surface of the side wall of the motor box is higher than the lower surface of the protective tube, and the motor box is spaced a preset distance from the inner side wall of the protective tube.

4. The slag granulator according to claim 3, characterized in that: The motor box is cylindrical, and the inner wall of the motor box is covered with an insulation layer. The insulation layer is spaced a preset distance from the motor body. The bottom of the motor box is provided with at least one air inlet for blowing air into the gap between the motor box and the motor body.

5. The slag granulator according to claim 1, characterized in that: The rotor cup, the coupling and the motor rotor constitute a rotating assembly, and the overall center of gravity of the rotating assembly is arranged between the bearings on both sides of the motor rotor.

6. The slag granulator according to claim 1, characterized in that: The feeding cup includes an upper cup body, a lower cup body and a cup bottom connected in sequence. A dynamic sealing structure is provided between the outer wall of the upper cup body and the inner wall of the rotating cup. The feeding direction of the feeding port forms a preset angle with the lower cup body, and the central top surface of the cup bottom is higher than the edge top surface of the cup bottom.

7. The slag granulator according to claim 6, characterized in that: The dynamic sealing structure includes a labyrinth sealing structure, which includes an annular dynamic ring sealing tooth and an annular static ring sealing tooth. The annular dynamic ring sealing tooth is arranged on the inner side wall of the rotor cup, and the annular static ring sealing tooth is arranged on the outer side wall of the upper cup body. The annular dynamic ring sealing tooth and the annular static ring sealing tooth are arranged in an alternating non-contact manner to form a cutoff gap and an expansion cavity. The cutoff gap and the expansion cavity constitute a labyrinth-shaped annular air gap.

8. The slag granulator according to claim 1, characterized in that: The opening shape of the feed port includes one of a rectangle, a square, a triangle, a circle or an ellipse.

9. The slag granulator according to claim 1, characterized in that: The maximum distance between the feed port and the inner side wall of the rotor cup does not exceed 8 mm.

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