A flat material slag breaking device for centrifugal granulation system

Abstract

The present invention discloses a flattening and slag-breaking device for a centrifugal granulation system, comprising a granulation system and a uniform slag breaker. A slag drop pipe is located at the top center of the granulation bin; the granulator is located directly below the drop pipe; and the uniform slag breaker is located outside the granulator. The present invention efficiently breaks up the slag wool generated during the granulation process, ensuring uniform distribution of slag particles within the granulation bin, reducing accidents and improving waste heat recovery.

Description

Technical Field

[0001] The invention belongs to the technical field of waste heat recovery of high-temperature liquid slag, and particularly relates to a flat material slag breaking device for a centrifugal granulation system. Background Art

[0002] Blast furnace slag is a solid waste generated during the steelmaking process. Its tapping temperature ranges from 1400 to 1550°C, and each ton of blast furnace slag carries approximately 1770 MJ of heat energy, equivalent to 60 kg of standard coal. This represents significant potential for heat recovery. Traditional blast furnace slag treatment primarily relies on water quenching, which has drawbacks such as high water consumption, generation of pollutants such as SO2 and H2S, and significant waste of waste heat. Energy conservation and emission reduction are urgent issues in the steel industry, and dry slag granulation and waste heat recovery technologies are gaining significant attention within the industry.

[0003] Slag dry granulation and waste heat recovery technology is a treatment method that rapidly crushes and solidifies liquid slag into small particles, virtually eliminating the need for water resources. Air is then used as a heat storage medium to fully contact and exchange heat with the slag particles, thereby recovering the remaining heat. Centrifugal granulation is the most promising slag treatment method due to its low energy consumption, excellent granulation results, simple and compact equipment, and controllable particle size and morphology.

[0004] Currently, during the centrifugal granulation process, when the granulator temperature is low, molten slag easily falls onto the granulator surface, forming slag lumps. These lumps, when ejected, can easily cause system blockage. Furthermore, when the liquid filaments shattered from the granulator cool rapidly, they form slag wool. This slag wool accumulates around the granulator, potentially causing the motor to jam and seriously impacting equipment operation. Furthermore, after the granulated slag particles hit the wall and rebound, they tend to be distributed near the granulation bin wall, resulting in uneven material distribution. This increases the probability of semi-molten slag particles sticking together and affects the system's heat exchange efficiency. Therefore, timely removal of generated slag wool and ensuring uniform slag particle distribution are essential measures for ensuring the safe and stable operation of dry granulation systems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide a flat material slag breaking device for a centrifugal granulation system, which is used to solve the technical problems of slag cotton generation and uneven slag particle distribution in the current high-temperature molten slag dry granulation process affecting the normal operation of the granulation system.

[0006] The present invention adopts the following technical solutions:

[0007] A flat material slag breaking device for a centrifugal granulation system includes a material leveling slag breaker, which is arranged between the granulator of the centrifugal granulation system and the side wall of the granulation bin. A slag dropping pipe is provided at the center position of the top of the granulation bin. The granulator partition wall is located below the material leveling slag breaker. The material leveling slag breaker is used to achieve material distribution in the horizontal direction and to transport slag particles on the side wall of the granulation bin to the center area of ​​the granulation bin in the vertical direction.

[0008] Specifically, the material distribution slag breaker includes a plurality of rotating shafts, spiral blades are arranged at intervals on the rotating shafts, and shifting teeth are staggered between adjacent spiral blades.

[0009] Furthermore, a plurality of rotating shafts are sequentially arranged between the granulator and the side wall of the granulating bin.

[0010] Furthermore, the height of the axis of the rotating shaft is sequentially lowered along the direction from the side wall of the granulating bin to the granulator.

[0011] Furthermore, the rotating shafts on both sides of the granulator rotate toward the side wall of the granulating bin, the rotating shafts at the side walls of the granulating bin rotate toward the granulator, the adjacent rotating shafts rotate toward the side wall of the granulating bin, and the remaining rotating shafts rotate toward the granulator.

[0012] Furthermore, a rotary joint is provided at the end of the rotating shaft.

[0013] Furthermore, a cooling medium channel is provided at the center of the rotating shaft, and a cooling medium is provided in the cooling medium channel.

[0014] Furthermore, grooves or holes are formed on the spiral blades.

[0015] Furthermore, the shifting teeth include multiple rows, which are evenly or non-evenly distributed on the rotating shaft.

[0016] Specifically, both sides of the upper end of the granulator partition wall are inclined structures.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The present invention provides a flat material slag breaking device for a centrifugal granulation system. Through the cooperation of spiral blades and shifting teeth, the spiral blades that are gradually lowered can realize the transmission of slag particles from the edge of the granulation bin to the center of the granulation bin, and the shifting teeth distributed in the blades can realize the crushing of slag cotton and slag blocks, thereby using one device to simultaneously realize the functions of slag breaking and uniform material distribution.

[0019] Furthermore, a cooling channel is provided on the rotating shaft of the flat material slag breaking device, which can take away the heat absorbed by the device from the granulation bin through the cooling medium, thereby ensuring the long-term safe operation of the device.

[0020] Furthermore, spiral blades are provided on the rotating shaft, which can transfer slag particles from the edge of the granulation bin to the center of the granulation bin through the rotation of the blades, thereby achieving uniform distribution of the slag particles; staggered teeth are provided between the spiral blades, which can break up slag blocks and slag cotton during rotation to prevent clogging of the slag waste heat recovery device.

[0021] Furthermore, several rotating shafts are arranged in sequence between the granulator and the side wall of the granulation bin, which can achieve uniform material and slag breaking in the entire granulation bin space, continuously transport the slag particles falling near the wall of the granulation bin to the entire granulation bin cross section, and crush the slag lumps and slag cotton.

[0022] Furthermore, the axis height of the rotating shaft decreases successively along the direction from the side wall of the granulating bin to the granulator, so that the slag particles rebounded by the spiral blades at a higher position close to the bin wall can be caught by the spiral blades at a lower position and continuously transmitted to the center of the granulating bin.

[0023] Furthermore, the rotating shafts on both sides of the granulator rotate toward the side walls of the granulation bin, the rotating shafts at the side walls of the granulation bin rotate toward the granulator, the adjacent rotating shafts rotate toward the side walls of the granulation bin, and the remaining rotating shafts rotate toward the granulator, which can achieve the crushing of slag blocks and slag cotton at the head and tail, while maintaining the slag particle transmission function in the middle.

[0024] Furthermore, by connecting a rotary joint at one end of the rotating shaft, it is possible to input the cooling medium into the rotating shaft from the stationary wall surface, and output the cooling medium after heat exchange in the shaft.

[0025] Furthermore, the granulating bin is a high-temperature space, and a cooling channel is provided in the rotating shaft to take away the heat absorbed by the device, thereby ensuring the safe operation of the material-leveling and slag-breaking device.

[0026] Furthermore, grooves or holes are provided on the spiral blades so that excess slag particles can fall and disperse in time, thereby preventing high-temperature slag particles from accumulating and squeezing on the spiral blades, which may lead to remelting and adhesion.

[0027] Furthermore, the shifting teeth include multiple rows, which can more evenly crush the slag lumps or slag wool. According to the actual situation in the granulation bin, more shifting teeth can be arranged in the area where the slag wool or slag lumps are concentrated.

[0028] Furthermore, both sides of the upper end of the granulator partition wall are inclined structures, which can promote the slag particles that fall thereon after passing through the material leveling and slag breaking device to fall down smoothly.

[0029] In summary, the present invention fully considers the need for uniform material and slag breaking after centrifugal granulation of slag. By combining spiral blades with shifting teeth, the functions of transporting slag particles and crushing slag blocks and slag cotton are integrated. The cooperation of the rotary joint and the cooling channel in the rotating shaft can achieve continuous cooling of the device to ensure its safe operation.

[0030] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the flat material slag breaking device of the centrifugal granulation system of the present invention;

[0032] Figure 2 This is a top view of the material slag breaker;

[0033] Figure 3 This is the front view of the uniform material slag breaking.

[0034] Among them: 1. Slag drop pipe; 2. Granulator; 3. Granulation bin; 4. Material distribution slag breaker; 5. Partition wall; 401. Rotating shaft; 402. Cooling medium channel; 403. Spiral blade; 404. Gear. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0039] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0040] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0041] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0042] The present invention provides a flat material slag breaking device for a centrifugal granulation system. A slag dropping pipe is arranged at the top center of a granulation bin; a granulator is arranged directly below the slag dropping pipe; and a material leveling slag breaker is arranged outside the granulator. The device can efficiently break up slag wool generated during the granulation process, so that the slag particles are evenly distributed in the granulation bin space, reduce accidents, and improve the waste heat recovery rate.

[0043] See also Figure 1 The present invention provides a flat material slag breaking device for a centrifugal granulation system, comprising a slag dropping pipe 1, a granulator 2, a granulation bin 3 and a uniform material slag breaker 4.

[0044] The slag dropping pipe 1 is arranged at the center position of the top of the granulation bin 3, the granulator 2 is arranged directly below the slag dropping pipe 1, the material distribution slag breaker 4 is arranged between the granulator 2 and the side wall of the granulation bin 3, and the granulator partition wall 5 is located below the material distribution slag breaker 4.

[0045] See also Figure 2 The material slag breaker 4 includes several rotating shafts 401 arranged side by side, a cooling medium channel 402 is provided in the center of the rotating shaft 401, and spiral blades 403 are arranged at intervals on each rotating shaft 401. The spiral blades 403 are used to realize the function of transporting slag particles from both ends of the rotating shaft 401 to the center in the axial direction; there are shifting teeth 404 staggered between adjacent spiral blades 403. When the rotating shaft 401 rotates, the shifting teeth 404 staggered on adjacent rotating shafts 401 are used to break the slag cotton.

[0046] The end of the rotating shaft 401 adopts a rotating joint to realize the circulation of the cooling medium.

[0047] A cooling medium is provided in the cooling medium channel 402 , and the cooling medium is gas, water or an organic medium.

[0048] The spiral blade 403 is provided with grooves or holes, which can reduce the squeezing of the slag particles and prevent the slag particles from sticking together. The grooves or holes can be evenly or unevenly distributed on the spiral blade.

[0049] The shifting teeth 404 include multiple rows and are evenly or unevenly distributed on the rotating shaft 401 .

[0050] In the horizontal direction, the rotating shafts 401 on both sides are close to the wall surface of the granulating bin 3, and the middle rotating shaft 401 is close to the rotating shaft of the granulator 2, so as to realize the distribution of the entire granulating bin.

[0051] In the vertical direction, the axis height of the rotating shaft 401 gradually decreases along the two sides of the granulating bin 3 toward the center, so that the slag particles on the left and right side walls of the granulating bin 3 are transported to the central area of ​​the granulating bin 3.

[0052] See also Figure 3 The rotating shaft 401 of the slag breaker 4 near the wall of the granulating bin 3 rotates toward the center of the granulating bin 3, and the rotating shaft 401 near the granulator 2 rotates toward the wall of the granulating bin 3; for the rotating shaft 401 in the slag concentrated falling area, with the center line of the falling area as the boundary, the rotating shafts 401 on the left and right sides rotate in opposite directions, respectively turning to the areas on the left and right sides where the slag is sparse.

[0053] The rotating shaft 401 is driven in the same direction via a belt or chain, and in opposite directions via a counter-rotating motor or gear. When a single motor is used, the motor is connected to a shaft, and the shafts rotating in the same direction are connected by a belt or chain, and the adjacent shafts rotating in opposite directions are connected by gears, thus completing the transmission of the entire device. When two motors are used, the two motors are connected to shafts of different rotation directions respectively, and the shafts rotating in the same direction are connected by a belt or chain.

[0054] Both sides of the upper end of the granulator partition wall 5 are inclined structures, so that the slag particles or the crushed slag cotton passing through the material slag breaker 4 can fall smoothly.

[0055] The working principle of the flat material slag breaking device for the centrifugal granulation system of the present invention is as follows:

[0056] When the flat material slag crushing device is in operation, the motor is first started to drive the rotating shafts on both sides of the granulator. The cooling medium is input into the rotating shaft through the rotary joint and then directly discharged into the granulation space or output through the rotary joint on the other side to ensure the normal temperature of the device. At this time, in the granulation space, the spiral blades on the axial direction of the rotating shaft rotate, transporting the slag particles near the wall of the granulation bin to the center of the granulation bin. The slag particles in the radial direction of the rotating shaft are rebounded by the blades and then continuously rebounded toward the center of the granulation bin by the gradually lowering rotating shaft rotating in the same direction. The rotating shafts rotating in opposite directions near the wall of the granulation bin and the center of the granulation bin are distributed at the beginning and end of the granulation spaces on the left and right sides. The teeth and blades rotate in opposite directions to ensure the crushing of slag cotton and slag lumps in the entire granulation space.

[0057] For the slag centrifugal granulation and waste heat recovery system, slag wool and slag lumps are always hidden dangers that endanger the safe and stable operation of the system. Through the application of the present invention, not only can the problems of slag wool and slag lumps be solved, but the slag particles can also be evenly distributed in the granulation bin, further strengthening the particle heat exchange and improving the waste heat recovery efficiency of the system, killing two birds with one stone.

[0058] In summary, the flat material slag breaking device for a centrifugal granulation system of the present invention fully considers the demand for uniform material slag breaking after centrifugal granulation of the molten slag, and integrates the functions of transporting slag particles and crushing slag blocks and slag cotton through the combination of spiral blades and shifting teeth. The continuous cooling of the device is achieved through the cooperation of the rotary joint and the cooling channel in the rotating shaft, thereby ensuring its safe and stable operation.

[0059] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A flat material slag breaking device for a centrifugal granulation system, characterized in that: The invention comprises a slag breaker (4) for uniform material distribution, which is arranged between a granulator (2) and a side wall of a granulation bin (3) of a centrifugal granulation system, a slag drop pipe (1) is arranged at the center of the top of the granulation bin (3), and a granulator partition wall (5) is located below the slag breaker (4). The slag breaker (4) is used to distribute the material in the horizontal direction and to transport the slag particles on the side wall of the granulation bin (3) to the center area of ​​the granulation bin (3) in the vertical direction. The rotating shafts (401) on both sides of the granulator (2) rotate toward the side wall of the granulation bin (3), the rotating shafts (401) on both sides of the side wall of the granulation bin (3) rotate toward the granulator (2), the adjacent rotating shafts (401) rotate toward the side wall of the granulation bin (3), and the remaining rotating shafts (401) rotate toward the granulator (2); The material-distributing slag breaker (4) comprises a plurality of rotating shafts (401), a cooling medium channel (402) is provided at the center of the rotating shafts (401), a cooling medium is provided in the cooling medium channel (402), spiral blades (403) are provided at intervals on the rotating shafts (401), grooves or holes are provided on the spiral blades (403), shifting teeth (404) are staggered between adjacent spiral blades (403), the shifting teeth (404) comprise multiple rows, and are distributed on the rotating shafts (401) in a uniform or non-uniform manner, and the plurality of rotating shafts (401) are sequentially arranged between the granulator (2) and the side wall of the granulation bin (3).

2. The flat material slag breaking device for the centrifugal granulation system according to claim 1, characterized in that: Along the direction from the side wall of the granulating bin (3) to the granulator (2), the axis height of the rotating shaft (401) is sequentially lowered.

3. The flat material slag breaking device for the centrifugal granulation system according to claim 1, characterized in that: A rotary joint is provided at the end of the rotating shaft (401).

4. The flat material slag breaking device for a centrifugal granulation system according to claim 1, characterized in that: Both sides of the upper end of the granulator partition wall (5) are inclined structures.

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