Water-cooling revolving cup device for slag centrifugal granulation and slag centrifugal granulation method

Abstract

The invention relates to a water-cooling revolving cup device for slag centrifugal granulation and a slag centrifugal granulation method, and belongs to the technical field of slag treatment. The revolving cup adopts a water mist layer formed by internal water cooling and side wall spray holes, so that the working temperature of the revolving cup is effectively reduced, and the service life of the revolving cup is prolonged. Cooling water in the revolving cup is thrown out through centrifugal force generated by high-speed rotation of the revolving cup, the cooling water can be pumped from a low position to a high position through the suction effect formed by the revolving cup and the water inlet pipe, and due to the fact that the water inlet is an open connector, a rotary sealing device is not needed, and the system structure is simplified. The blades with angles are arranged on the inner wall of the water inlet pipe, and the cooling water is driven upwards from bottom after the blades rotate, so that the flow of the cooling water is increased, and the cooling effect is improved. And after being sprayed out from the water outlet in the side wall of the revolving cup, cooling water can be recycled after being recycled, filtered and cooled. The device has the advantages of simple structure, good cooling effect, long service life, low maintenance cost and the like, and is suitable for the field of high-temperature slag treatment.

Description

Technical Field

[0001] The present invention belongs to the technical field of slag treatment, and relates to a water-cooled rotary cup device for centrifugal granulation of slag and a method for centrifugal granulation of slag. Background Art

[0002] In the process of slag treatment, the centrifugal granulation technology is widely used due to its high efficiency and energy saving characteristics. However, when traditional rotary cups are used to process high-temperature slag, the surface materials are easily worn, which not only seriously affects the equipment life, but also leads to a decline in granulation effect. The stable and long-life operation of the core equipment for centrifugal granulation is the key issue determining the industrial application of the whole system. Therefore, how to improve the service life of the rotary cup at high temperature has become an urgent problem to be solved in this field.

[0003] In the prior art, the design and material selection of the rotary cup often cannot effectively cope with the erosion of high-temperature slag, resulting in a short service life and easy damage of the rotary cup. In addition, there are also deficiencies in the cooling system of traditional rotary cups, such as poor cooling effect, complex system, high maintenance cost, etc. Therefore, developing a rotary cup structure that can effectively improve the service life of the rotary cup, simplify the system structure, and reduce the maintenance cost is of great significance for improving the performance and stability of slag centrifugal granulation equipment. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a water-cooled rotary cup device for centrifugal granulation of slag and a method for centrifugal granulation of slag, specifically a rotary cup structure with water flowing inside and metal outside, which is designed for the problem of the service life of the rotary cup during the centrifugal granulation of slag.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A water-cooled rotary cup device for centrifugal granulation of slag, comprising:

[0007] A rotary cup body, the inner cavity of which is a water-passing structure, and a plurality of water outlet holes are distributed on the side wall;

[0008] An inlet pipe, fixedly connected to the bottom of the rotary cup body and rotating coaxially with the rotary cup body;

[0009] The rotary cup body is rigidly connected to the inlet pipe. When the rotary cup body rotates, the cooling water is thrown out from the water outlet holes under the action of centrifugal force, and a negative pressure is formed in the inner cavity of the rotary cup, and the cooling water is continuously sucked in;

[0010] The inner wall of the inlet pipe is provided with spiral blades for driving the cooling water to flow into the inner cavity of the rotary cup.

[0011] Optionally, it further includes a cooling water supply system, including a water tank communicated with the inlet pipe, and the liquid level height of the water tank is higher than the inlet end of the inlet pipe.

[0012] Optionally, it further includes a support mechanism, which includes a thrust ball bearing and a limit bearing. The thrust ball bearing supports the axial loads of the rotating cup body and the water inlet pipe, and the limit bearing restricts the radial displacement to ensure the rotational stability.

[0013] Optionally, the included angle range between the axis of the water outlet hole and the horizontal plane is -60° to 60°, and the upper edge of the water outlet hole is lower than the height of the outlet end of the water inlet pipe.

[0014] Optionally, a liquid level detection device and a flow regulating valve are provided in the water tank for dynamically controlling the supply amount of the cooling water according to the liquid level.

[0015] Optionally, the limit bearing of the support mechanism is a rolling bearing or a sliding bearing, and the number is not less than 1.

[0016] A method for centrifugal granulation of molten slag, using the above-mentioned water-cooled rotating cup device, includes the following steps:

[0017] Drive the rotating cup body and the water inlet pipe to rotate synchronously;

[0018] Centrifugally throw the cooling water out of the water outlet holes on the side wall of the rotating cup to form a water mist layer surrounding the rotating cup;

[0019] Utilize the negative pressure effect in the inner cavity of the rotating cup to continuously suck the cooling water into the inner cavity of the rotating cup;

[0020] Enhance the flow rate of the cooling water from the water tank to the inner cavity of the rotating cup through the rotation drive of the spiral blade;

[0021] Control the contact range and cooling intensity between the cooling water and the molten slag by adjusting the spraying angle of the water outlet holes.

[0022] Optionally, when the flow rate of the molten slag increases, adjust the spraying angle of the water outlet holes to 0° to 60° to make the cooling water droplets collide with the molten slag particles to enhance the cooling effect.

[0023] Optionally, it further includes a cooling water supply system, which includes a water tank communicated with the water inlet pipe. The liquid level height of the water tank is higher than the inlet end of the water inlet pipe. By adjusting the liquid level height of the water tank and the spraying angle of the water outlet holes, control the contact range and cooling intensity between the cooling water and the molten slag.

[0024] Optionally, the cooling water is recycled after being collected, filtered by the water collecting tank. The water collecting tank is arranged below the rotating cup and separated from the flight trajectory of the molten slag.

[0025] The beneficial effects of the present invention are as follows:

[0026] Improve the service life of the rotating cup: Through internal water cooling and the water mist layer formed by the spray holes on the side wall, the working temperature of the rotating cup is effectively reduced, the strength of the rotating cup under high-temperature working conditions is ensured, the material wear caused by high temperature is reduced, and the service life of the rotating cup is significantly improved.

[0027] Simplify the system structure: By utilizing the centrifugal force generated by the high-speed rotation of the rotor cup, the cooling water in the rotor cup is thrown out. The suction effect formed by the rotor cup and the water inlet pipe can draw the cooling water from a lower position to a higher position. Since the water inlet is an open interface, a rotary sealing device is not required, thus simplifying the system structure.

[0028] Improve the cooling effect: By setting angled vanes on the inner wall of the water inlet pipe, the cooling water is driven upward from the bottom after the vanes rotate, thereby increasing the flow rate of the cooling water and improving the cooling effect.

[0029] Save resources: After the cooling water is sprayed out from the side wall outlet of the rotor cup, it can be recycled after being recovered, filtered, and cooled, thus saving water resources.

[0030] Reduce the maintenance cost: Due to the simple system structure, the maintenance cost and failure rate are low, reducing the maintenance cost of the equipment.

[0031] Other advantages, objectives, and features of the present invention will, to some extent, be described in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. Brief Description of the Drawings

[0032] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in preferred detail below in conjunction with the drawings, where:

[0033] Figure 1 is the main structure of the water-cooled rotor cup;

[0034] Figure 2 is the installation schematic diagram of the water inlet pipe nozzle;

[0035] Figure 3 is the installation schematic diagram of the vanes;

[0036] Figure 4 is the rotor cup including the support structure;

[0037] Figure 5 is the adjustment range of the outlet angle of the rotor cup and the difference in the flight trajectories of slag particles and cooling water.

[0038] Reference Signs:

[0039] 1 - Rotor cup;

[0040] 1.1 - Spray holes;

[0041] 2 - Water inlet pipe;

[0042] 3 - Water inlet pipe nozzle;

[0043] 3.1 - Blade;

[0044] 4 - Water tank;

[0045] 5 - Water flow direction;

[0046] 6 - Atmospheric pressure;

[0047] 7 - Support base;

[0048] 8 - Support foundation;

[0049] 9.1 - Thrust ball bearing;

[0050] 9.2 - Rolling / sliding bearing; Detailed implementation mode

[0051] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0052] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0053] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0054] Please refer to Figures 1 to 5, this embodiment demonstrates a water-cooled rotating cup device for centrifugal granulation of molten slag. The core component of the device is the rotating cup 1, whose inner cavity is designed as a water-passing structure, and a water inlet pipe 2 is provided at the bottom. Cooling water enters the inside of the rotating cup 1 through the water inlet pipe 2. A number of spray holes 1.1 are evenly distributed on the side wall of the rotating cup 1. The rotating cup 1 and the water inlet pipe 2 are rigidly connected and rotate synchronously.

[0055] When the rotating cup 1 rotates, the cooling water is ejected from the spray holes 1.1 along the water flow direction 5 under the action of centrifugal force, forming a water mist layer around the inner wall of the rotating cup. At the same time, since a negative pressure area is formed after the water in the cavity is thrown out, under the action of atmospheric pressure 6, the cooling water flows upward from the lower part through the water inlet pipe 2. The rotating cup 1 is made of metal material and has the characteristic of rapid heat conduction, and quickly takes out the heat of the high-temperature molten slag through the cooling water to ensure the mechanical strength of the rotating cup.

[0056] The lower part of the water inlet pipe 2 of the rotating cup 1 is inserted into the water tank 4, and the liquid level height in the water tank 4 is higher than the pipe orifice 3 of the water inlet pipe 2. By adjusting the water level height in the water tank 4, the water level in the water inlet pipe 2 can be controlled. There is no sealing or connection between the water inlet pipe 2 and the water tank 4. When the rotating cup 1 starts, the height difference between the cooling water liquid level in the water inlet pipe 2 and the rotating cup 1 can be reduced by increasing the liquid level height in the water tank 4, thereby accelerating the pumping speed of the cooling water. A communicating vessel can be provided on one side of the water tank 4 to facilitate observing the liquid level height.

[0057] There is an included angle between the axis of the spray hole 1.1 on the side wall of the rotating cup 1 and the axes of the rotating cup 1 and the water inlet pipe 2, and the range of this included angle with the horizontal plane is between 60° and -60°. To achieve efficient recovery of the waste heat of the high-temperature molten slag, the included angle can be set in the range of 0° to -60°, so that the movement trajectory of the ejected cooling water is biased downward, forming a large deviation from the movement trajectory of the horizontally ejected high-temperature slag particles. At this time, a water collecting tank can be provided below to collect the cooling water for recycling.

[0058] Under certain working conditions, such as when the slag flow rate changes violently, the included angle can be set between 0° and 60°, so that the movement trajectory of the ejected cooling water is biased upward and collides with the slag particles granulated by the rotating cup, strengthening the cooling effect.

[0059] The water inlet pipe 2 is inserted into the inner cavity of the rotating cup 1, and its pipe orifice 3 is higher than the bottom surface of the rotating cup 1 and the upper edge of the side wall water outlet hole 1.1. This design distributes the cooling water in the upper half of the rotating cup 1, which is more conducive to the low-temperature cooling water taking away the heat of the rotating cup 1. At the part where the water inlet pipe 2 is inserted below the water surface of the water tank 4, inclined blades 3.1 are installed on the inner wall. When the rotating cup 1 and the water inlet pipe 2 rotate together, the blades 3.1 push the cooling water to flow from the low position to the high position, which not only increases the cooling water flow rate, but also can quickly lift the cooling water to the inner cavity of the rotating cup 1 when the rotating cup 1 starts.

[0060] A support mechanism is installed on the side of the water inlet pipe 2, which contacts the load-bearing bracket in the form of a thrust ball bearing 9.1. Below the thrust ball bearing 9.1, a rolling or sliding bearing 9.2 is installed on the water inlet pipe 2 for positioning. The thrust ball bearing 9.1 can effectively bear the mass of the rotating cup 1 and the water inlet pipe 2, while the sliding bearing 9.2 ensures the stable operation of the rotating cup 1. A liquid level detection and flow regulation device is installed in the cooling water tank 4, which can control the intake of cooling water according to the liquid level situation, improving the operation stability of the system.

[0061] The whole rotating cup 1 is made of high-strength and high-wear-resistant materials, adapting to the harsh working conditions during the granulation of high-temperature molten slag. The water-passing structure design of its inner cavity allows the cooling water to directly flow through the inside of the rotating cup 1. After the cooling water is rotated and thrown out, the cooling water below continuously enters the cavity of the rotating cup 1 under the action of atmospheric pressure and the driving of the spiral blade, realizing effective heat conduction and heat dissipation.

[0062] Specifically, after the water inlet pipe 2 is inserted into the cavity from the bottom of the rotating cup 1, the position of its pipe outlet is higher than the bottom surface and the side water outlet holes 1.1 of the rotating cup 1. This arrangement ensures that when the cooling water enters the inside of the rotating cup 1, while flowing outward under the action of centrifugal force, it can be closer to the top surface of the rotating cup 1, forming a strong cooling effect on the upper surface in contact with the molten slag.

[0063] To further increase the cooling water volume, blades 3.1 with an inclined angle are installed on the inner wall of the pipe orifice 3 of the water inlet pipe 2. When the blades 3.1 rotate together with the rotating cup 1 and the water inlet pipe 2, they can push the cooling water to flow upward, combined with the centrifugal force to throw out the cooling water from the upper part, forming a strong suction effect. The blades 3.1 can be spiral or several blades evenly distributed along the circumference with a certain inclination angle.

[0064] For the support and positioning of the rotating cup 1 and the water inlet pipe 2, a thrust ball bearing 9.1 and a rolling / sliding bearing 9.2 are respectively used. A support seat 7 is installed on the side wall of the water inlet pipe 2 of the rotating cup 1, and a thrust ball bearing 9.1 is installed between the support seat 7 and the support foundation 8. The weight of the rotating cup 1 and the water inlet pipe 2 is transmitted to the support foundation 8 through the thrust ball bearing 9.1. At the same time, one or more rolling / sliding bearings 9.2 are arranged below the support foundation 8 to position and restrict the rotating cup 1 and the water inlet pipe 2, ensuring smooth and stable rotation.

[0065] In summary, through its unique design, the water-cooled wear-resistant rotating cup of the present invention uses cooling water to strengthen the cooling of the rotating metal rotating cup 1, taking away the heat conducted by the high-temperature molten slag to the rotating cup 1, ensuring the strength and service life of the rotating cup 1. At the same time, using the centrifugal force generated by the rotation of the rotating cup 1, the cooling water is continuously sucked through the water inlet pipe 2. The water inlet pipe 2 does not need to be sealed, avoiding various problems of rotating seals under high-speed working conditions. The water-cooled rotating cup 1 of the present invention realizes the centrifugal granulation of high-temperature molten slag and ensures the stability and durability of the rotating cup 1 in a high-temperature and high-speed working environment, having significant technical advantages and application prospects.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A water-cooled rotor device for centrifugal granulation of slag, characterized in that: include: The rotating cup body (1) has an inner cavity with a water-permeable structure and a plurality of water outlet holes (1.1) distributed on the side wall; A water inlet pipe (2) is fixedly connected to the bottom of the rotor body (1) and rotates coaxially with the rotor body (1); The rotor body (1) is rigidly connected to the water inlet pipe (2). When the rotor body (1) rotates, cooling water is thrown out from the water outlet hole (1.1) under the action of centrifugal force, negative pressure is formed in the inner cavity of the rotor, and cooling water is continuously sucked in. The inner wall of the water inlet pipe (2) is provided with spiral blades (3.1) for driving cooling water to flow toward the inner cavity of the rotor cup.

2. The water-cooled rotor device for centrifugal granulation of slag according to claim 1, characterized in that: It also comprises a cooling water supply system, comprising a water tank (4) connected to the water inlet pipe (2), wherein the liquid level of the water tank (4) is higher than the inlet end of the water inlet pipe (2).

3. The water-cooled rotor device for centrifugal granulation of slag according to claim 1, characterized in that: It also comprises a supporting mechanism, including a thrust ball bearing (9.1) and a limit bearing (9.2), wherein the thrust ball bearing (9.1) supports the axial load of the rotor body (1) and the water inlet pipe (2), and the limit bearing (9.2) constrains radial displacement to ensure rotational stability.

4. The water-cooled rotor device for centrifugal granulation of slag according to claim 1, characterized in that: The angle between the axis of the water outlet hole (1.1) and the horizontal plane ranges from -60° to 60°, and the upper edge of the water outlet hole (1.1) is lower than the height of the outlet end of the water inlet pipe (2).

5. The water-cooled rotor device for centrifugal granulation of slag according to claim 2, characterized in that: The water tank (4) is provided with a liquid level detection device and a flow regulating valve for dynamically controlling the cooling water supply according to the liquid level.

6. The water-cooled rotor device for centrifugal granulation of slag according to claim 3, characterized in that: The limiting bearing (9.2) of the supporting mechanism is a rolling bearing or a sliding bearing, and the number is not less than one.

7. A slag centrifugal granulation method, characterized in that: The water-cooled rotating cup device as claimed in any one of claims 1 to 6 comprises the following steps: Driving the rotating cup body (1) and the water inlet pipe (2) to rotate synchronously; The cooling water is thrown out from the water outlet hole (1.1) on the side wall of the rotor cup by centrifugal force to form a water mist layer surrounding the rotor cup; Utilize the negative pressure effect of the rotor cavity to continuously suck cooling water into the rotor cavity; The flow rate of cooling water from the water tank (4) to the inner cavity of the rotor cup is increased by the rotation drive of the spiral blade (3.1); The contact range between cooling water and slag and the cooling intensity are controlled by adjusting the spray angle of the water outlet (1.1).

8. The slag centrifugal granulation method according to claim 7, characterized in that: When the slag flow rate increases, the spray angle of the water outlet (1.1) is adjusted to 0° to 60° so that the cooling water droplets collide with the slag particles to enhance the cooling effect.

9. The slag centrifugal granulation method according to claim 7, characterized in that: It also includes a cooling water supply system, including a water tank (4) connected to the water inlet pipe (2), the liquid level of the water tank (4) being higher than the inlet end of the water inlet pipe (2), and the contact range between the cooling water and the slag and the cooling intensity being controlled by adjusting the liquid level of the water tank (4) and the spraying angle of the water outlet hole (1.1).

10. The slag centrifugal granulation method according to claim 7, characterized in that: The cooling water is recycled and filtered through a water collecting tank, and the water collecting tank is arranged below the rotating cup and separated from the slag flight track.

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