Anti-caking discharge port structure of rotary kiln head hot material bin

Abstract

The utility model discloses a rotary kiln head hot material bin's anti -caking discharge port structure belongs to material handling equipment technical field, the structure includes the board body, is located in the mechanical stirring system and the water spraying cooling system that constitutes by the connecting plate, water pipe, atomizing spray head, direct -current spray head that constitutes by motor, reducer, axle rod and rotation board in the board body, mechanical stirring system with water spraying cooling system synergistic effect, solved the high temperature material because of the adhesion and caking block, lead to the technical problem of the discharge not smooth, reached the effect of forced stirring and water -cooling double anti -caking, ensured the discharge continuous stability, preferably, the structure still integrated the multistage screening grating of quick dismounting and replacement downstream in the discharge port, realized the integration of discharge and particle size grading, significantly simplified the technological process and promoted the convenience of production and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of material handling equipment technology, and in particular to the anti-caking discharge port structure of the hot material bin at the kiln head of a rotary kiln. Background Technology

[0002] Rotary kilns are key thermal equipment used in industries such as cement, metallurgy, and chemicals to process solid materials. The materials discharged from the kiln head, such as cement clinker or quicklime, are at extremely high temperatures. After being discharged, these high-temperature materials need to enter the kiln head hot feed bin for temporary buffering or conveying. Due to the strong plasticity and adhesion of the material surface at high temperatures, when the material is statically accumulated in the hot feed bin, physical adhesion occurs between the material particles and between the material and the inner wall of the bin, thus forming hard lumps, i.e., caking.

[0003] When materials clump together inside the silo, they can severely clog the discharge port at the bottom of the silo, directly causing difficulties in discharge or even complete interruption of discharge, thus disrupting the continuous and stable operation of the entire production process. In order to solve the problem of blockage at the discharge port, operators on the production site must take manual intervention measures, using tools such as pneumatic picks and long iron bars to poke and break up the clumps blocking the discharge port. This manual unblocking method not only exposes workers to a harsh working environment with high temperature and dust, posing serious safety risks, but also the frequent shutdowns for unblocking operations greatly reduce the effective operating rate of the equipment and production efficiency.

[0004] Furthermore, the particle size distribution of the material discharged from the hot material silo is uneven, and subsequent processes such as cooling, conveying, or grinding have specific requirements for the particle size of the material to ensure processing efficiency and product quality. In the existing process layout, screening equipment such as vibrating screens need to be independently configured downstream of the hot material silo to classify the material. This separate equipment configuration increases the total floor space of the production line, increases equipment investment costs, and makes the entire material processing process route longer and more complex.

[0005] Therefore, this utility model proposes an anti-caking discharge port structure for the hot material bin at the kiln head of a rotary kiln to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems in the prior art, such as the easy adhesion and caking of high-temperature materials at the discharge port of the hot material silo at the kiln head, leading to discharge blockage, and the need for additional independent equipment for material screening after discharge, resulting in a complex process flow and large footprint, this utility model aims to provide an anti-caking discharge port structure for the hot material silo at the kiln head of a rotary kiln with an improved structure that can effectively solve the above problems.

[0007] This utility model provides an anti-caking discharge port structure for the hot material bin at the kiln head of a rotary kiln, comprising: a plate body, a discharge trough, a rotating plate, a shaft, a reducer, a motor, a connecting plate, an atomizing nozzle, a DC nozzle, and a water pipe.

[0008] The motor, reducer, shaft, and rotating plate together form a mechanical transmission chain for agitating the material, while the connecting plate, atomizing nozzle, DC nozzle, and water pipe together form a cooling system for spraying water to cool the material.

[0009] Furthermore, the output shaft of the motor is connected to the input end of the reducer, the output end of the reducer is connected to the shaft, and the rotating plate is fixed on the shaft to realize power transmission; the connecting plate is fixedly installed on the plate body, and the atomizing nozzle and the DC nozzle are both installed on the connecting plate and facing the inside of the plate body, and are connected to the connecting plate through the water pipe to form a synergistic structure that simultaneously performs mechanical agitation and water spraying cooling on the material inside the plate body.

[0010] Preferably, the anti-caking discharge port structure of the rotary kiln head hot material hopper further includes a screening mechanism, which is located downstream of the discharge trough and is used to screen the discharged material.

[0011] Preferably, the screening mechanism includes a guide plate and a primary screening grid, a secondary screening grid, and a tertiary screening grid arranged sequentially along the material flow direction.

[0012] Preferably, the guide plate is an inclined plate structure used to guide the material to slide sequentially to each level of screening grid.

[0013] Preferably, the screening mechanism further includes a rotating column, bolts, a fixing plate, and a fixing groove. The primary screening grid, the secondary screening grid, and the tertiary screening grid are pivotally connected through the rotating column, forming a replaceable screening unit.

[0014] Preferably, the fixing plate is connected to the rotating column, and the bolt passes through the fixing plate and is threaded into the fixing groove to fix or loosen the position of the screening unit.

[0015] Preferably, the anti-caking discharge port structure of the rotary kiln head hot material silo further includes a base, and the bottom of the motor is fixed on the base for stabilizing the drive system.

[0016] Preferably, the connecting plate has a hollow structure, which is used to evenly distribute the cooling water flowing from the water pipe to the atomizing nozzle and the direct current nozzle.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problem in the prior art where the hot material bin outlet is prone to caking and blockage due to the adhesion of materials at high temperature, which leads to production interruption, by setting a rotating plate driven by a motor to force mechanical agitation of high-temperature materials, and coordinating a cooling system including atomizing nozzles and DC nozzles to spray water to cool the materials. This ensures the continuity and stability of material discharge.

[0019] 2. This utility model solves the problems of material screening after discharge requiring additional equipment, having a long process flow, and being difficult to adjust screen specifications and time-consuming to maintain, by integrating a multi-stage screening grid downstream of the discharge port and equipping it with a mechanism that can be quickly disassembled and assembled by rotating columns and bolts. It simplifies the production line, saves space, and allows for quick screen replacement according to production needs, greatly improving operational convenience and production flexibility. Attached Figure Description

[0020] Figure 1 This is a front perspective view of the anti-caking discharge port structure of the hot material bin at the kiln head of the rotary kiln proposed in this utility model.

[0021] Figure 2 This is a partial structural breakdown diagram of the reducer for the anti-caking discharge port structure of the hot material bin at the rotary kiln head proposed in this utility model.

[0022] Figure 3 This is a partial structural disassembly diagram of the connecting plate of the anti-caking discharge port structure of the hot material bin at the kiln head of the rotary kiln proposed in this utility model.

[0023] Figure 4 This is a partial structural breakdown of the fixing plate of the anti-caking discharge port structure of the rotary kiln head hot material bin proposed in this utility model.

[0024] Legend:

[0025] 1. Plate body; 2. Screening mechanism; 201. Guide plate; 202. Primary screening grid; 203. Secondary screening grid; 204. Tertiary screening grid; 205. Rotating column; 206. Bolt; 207. Fixing plate; 208. Fixing groove; 3. Motor; 4. Reducer; 5. Shaft; 6. Rotating plate; 7. Discharge chute; 8. Water pipe; 9. Connecting plate; 10. Atomizing nozzle; 11. DC nozzle; 12. Base. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0027] Example:

[0028] Please refer to Figures 1 to 4 This utility model embodiment provides an anti-caking discharge port structure for the hot material bin of a rotary kiln, including a plate body 1. A discharge trough 7 for guiding material discharge is fixedly connected to one side of the lower part of the plate body 1. A drive unit consisting of a motor 3 and a reducer 4 is provided on the outside of the plate body 1. The motor 3 is stably fixedly mounted on a support platform via a base 12. The output shaft of the motor 3 is connected to the input end of the reducer 4. The output end of the reducer 4 is connected to one end of a shaft 5. The shaft 5 passes through the side wall of the plate body 1 through a bearing and a sealing structure, extending horizontally into the internal space of the plate body 1. A rotating plate 6 is fixedly installed on the shaft 5 extending into the plate body 1. The rotating plate 6 has a radial plate-like structure, and its rotation range covers the bottom of the plate body 1 to agitate and push the material flow to the discharge trough 7, thus forming a mechanical anti-caking system. At the same time, in order to achieve active cooling of the material, a connecting plate 9 is fixed across the upper opening of the plate body 1. The connecting plate 9 is a hollow tubular or box-shaped structure to facilitate water flow distribution. A water pipe 8 is connected to one end of the connecting plate 9 to supply cooling water. On the bottom surface of the connecting plate 9 facing the internal space of the plate body 1, atomizing nozzles 10 and direct current nozzles 11 are installed at intervals. The nozzles of the atomizing nozzles 10 and direct current nozzles 11 are both vertically downward, forming a spray area that can cover the surface of the material, thus forming a cooling and anti-caking system.

[0029] Please refer to Figure 1 , Figure 3 and Figure 4 The anti-caking discharge port structure of the rotary kiln head hot material bin also includes a screening mechanism 2 located downstream of the discharge trough 7. The screening mechanism 2 and the discharge trough 7 form a fixed connection to receive materials. The screening mechanism 2 includes a guide plate 201 as a guiding base, a primary screening grid 202, a secondary screening grid 203, and a tertiary screening grid 204 for particle size classification. The upper end of the guide plate 201 is fixedly connected to the outlet of the discharge trough 7. The guide plate 201 is set in an inclined state to guide the material rolling out of the discharge trough 7 to slide down smoothly using gravity. The primary screening grid 202, the secondary screening grid 203, and the tertiary screening grid 204 are arranged in a stepped manner along the sliding direction of the material on the guide plate 201. This structure allows the material to pass through different levels of screening in sequence.

[0030] To enable rapid disassembly and replacement of the screening grids, the screening mechanism 2 also includes a locking and releasing device, consisting of a rotating column 205, bolts 206, a fixing plate 207, and a fixing groove 208. One end of each screening grid is supported and positioned by the rotating column 205. The fixing plate 207 is fixedly connected to the top of the rotating column 205, and the bolts 206 pass through the fixing plate 207 and are threaded into the fixing groove 208. When the screening grid needs to be replaced, simply loosen the bolts 206 to disengage them from the fixing groove 208, and then rotate the fixing plate 207. The fixing plate 207 then drives the rotating column 205 to rotate synchronously, thereby changing the support state of the screening grid and allowing it to be easily disassembled. This structure, which unlocks the entire grid row by rotating a single bolt 206, greatly improves maintenance efficiency and operational convenience.

[0031] As a preferred embodiment, in order to ensure the smooth and reliable operation of the drive system, a base 12 is provided below the motor 3. The base 12 has a large bottom area and sufficient weight to effectively absorb and suppress the vibration generated by the motor 3 during operation, ensuring a smooth and stable power transmission process from the motor 3 to the reducer 4 and then to the shaft 5, and avoiding loose connections or component fatigue damage caused by vibration.

[0032] As another preferred embodiment, in order to achieve precise control of the rotation speed of the rotating plate 6 to adapt to the characteristics of different materials, the connection between the motor 3 and the reducer 4, as well as the connection between the reducer 4 and the shaft 5, are all detachable flange connections or key connections. The reducer 4 is equipped with an observation window and an oil inlet to facilitate the inspection and replenishment of the lubrication status of the internal gears. The reduction ratio of the reducer 4 can be selected according to the process requirements, thereby accurately adjusting the high speed of the motor 3 to the low speed and high torque output required for material agitation.

[0033] As another preferred embodiment, in order to optimize the cooling effect and ensure the reliability of the water system, the internal water channel of the connecting plate 9 is designed as an integrated flow channel, reducing welding joints and leakage points. After entering the connecting plate 9, the cooling water flowing in from the water pipe 8 is evenly distributed to the inlet of each atomizing nozzle 10 and direct current nozzle 11. The nozzle orifice of the atomizing nozzle 10 is smaller, which can generate a large area of ​​fine water mist for overall coverage and flexible cooling of the material. The nozzle orifice of the direct current nozzle 11 is larger, which can form a concentrated high-pressure water column for impacting any stubborn agglomerates or for strong cooling of local overheated spots.

[0034] Working principle: When the high-temperature red ball material enters the receiving space of plate 1 through the kiln head of the rotary kiln, the anti-caking discharge program is immediately started. First, the motor 3 fixed on the base 12 starts to run. The stable power output of the motor 3 is transmitted to the reducer 4. After the reducer 4 reduces the speed and increases the torque, it drives the rigidly connected shaft 5 to rotate at a set low speed with strong force. Since the rotating plate 6 is firmly installed on the shaft 5, the rotating plate 6 also rotates 360 degrees in the lower space of plate 1. The rotation of the rotating plate 6 generates a strong mechanical stirring and scraping effect, which can continuously turn over and loosen the accumulated red ball material, so that the material particles cannot maintain static contact for a long time, thereby physically preventing the formation of caking.

[0035] The rotation of the rotating plate 6 also forcibly scrapes away the material adhering to the inner wall of the plate 1, while simultaneously pushing the entire material pile towards the discharge chute 7. During mechanical agitation, the cooling system begins operation. External cooling water enters the hollow connecting plate 9 through the water pipe 8. Under the precise flow channel distribution of the connecting plate 9, the water flow is guided and sprayed from the atomizing nozzle 10 and the direct current nozzle 11. The atomizing nozzle 10 sprays a wide-coverage fine water mist, which evaporates rapidly, efficiently carrying away heat from the upper material and the entire space, thus achieving heat dissipation from the material. The overall, non-impact pre-cooling greatly reduces the overall temperature gradient and adhesion tendency of the material, while the DC nozzle 11 sprays a concentrated water jet with impact force. The water jet can penetrate the surface material and directly cool the deeper, hotter material, or powerfully impact and break up stubborn initial clumps formed due to local overheating. The dual effects of mechanical agitation and water spray cooling promote each other. Agitation exposes the deep hot material to the water mist and water jet, while cooling makes the material loose and easier to agitate, completely eliminating the possibility of material caking.

[0036] After the above anti-caking treatment, the loose and cooled red ball material, under the continuous pushing of the rotating plate 6 and its own gravity, smoothly slides into and through the discharge chute 7, completing its discharge from the hopper. The material leaving the discharge chute 7 then falls onto the inclined guide plate 201 and slides down the inclined surface of the guide plate 201 in an orderly manner. During the sliding process, the material will sequentially contact the primary screening grid 202, the secondary screening grid 203, and the tertiary screening grid 204. The material with a size smaller than the aperture of the primary screening grid 202 falls first, while the slightly larger material continues to slide down to the secondary screening grid 204. Screening is performed at point 03, and so on, to achieve automatic grading and collection of materials of different particle sizes, meeting the fine feeding requirements of subsequent processes. When the screening specifications need to be adjusted, the maintenance and adjustment process is also extremely convenient. Maintenance personnel only need to unscrew the bolts 206 locked in the fixing groove 208 to release the locking of the fixing plate 207. Then, the fixing plate 207 can be rotated directly, and the rotating column 205 linked with the fixing plate 207 will also rotate, thereby pivoting all the screening grids to an open angle, making it easy to remove and replace the target grid. After the new grid is installed, the reverse operation can be performed to quickly restore production.

Claims

1. The anti-caking discharge structure of the hot material bin at the rotary kiln head includes: Plate (1), wherein a discharge trough (7) is provided on the plate (1); Its features are, It also includes a rotating plate (6) disposed in the plate body (1), a shaft (5) for driving the rotating plate (6), a reducer (4) and a motor (3). The output shaft of the motor (3) is connected to the input end of the reducer (4), and the output end of the reducer (4) is connected to the shaft (5). The rotating plate (6) is fixed on the shaft (5) to form a mechanical transmission chain for agitating the material in the plate body (1). The structure also includes a connecting plate (9), an atomizing nozzle (10), and a direct current nozzle (11). The connecting plate (9) is fixedly installed on the plate body (1). The atomizing nozzle (10) and the direct current nozzle (11) are both installed on the connecting plate (9) and face the inside of the plate body (1), and are connected to the connecting plate (9) through a water pipe (8) to form a cooling system for spraying water to cool the material inside the plate body (1).

2. The anti-caking discharge port structure of the rotary kiln head hot material bin according to claim 1, characterized in that, The structure also includes a screening mechanism (2), which is located downstream of the discharge trough (7) and is used to screen the material discharged from the discharge trough (7).

3. The anti-caking discharge port structure of the rotary kiln head hot material bin according to claim 2, characterized in that, The screening mechanism (2) includes a guide plate (201) and a primary screening grid (202), a secondary screening grid (203) and a tertiary screening grid (204) arranged sequentially along the material flow direction.

4. The anti-caking discharge port structure of the rotary kiln head hot material bin according to claim 3, characterized in that, The guide plate (201) is an inclined plate structure used to guide the material to slide sequentially to the primary screening grid (202), the secondary screening grid (203) and the tertiary screening grid (204).

5. The anti-caking discharge port structure of the rotary kiln head hot material bin according to claim 3, characterized in that, The screening mechanism (2) also includes a rotating column (205), bolts (206), a fixing plate (207) and a fixing groove (208), and the primary screening grid (202), the secondary screening grid (203) and the tertiary screening grid (204) are pivotally connected through the rotating column (205).

6. The anti-caking discharge port structure of the rotary kiln head hot material bin according to claim 5, characterized in that, The fixing plate (207) is connected to the rotating column (205), and the bolt (206) passes through the fixing plate (207) and is threaded into the fixing groove (208) to fix or loosen the position of the fixing plate (207) and the rotating column (205).

7. The anti-caking discharge port structure of the rotary kiln head hot material bin according to claim 1, characterized in that, The structure also includes a base (12), on which the bottom of the motor (3) is fixed.

8. The anti-caking discharge port structure of the rotary kiln head hot material bin according to claim 1, characterized in that, The connecting plate (9) has a hollow structure and is used to distribute water flowing in from the water pipe (8) to the atomizing nozzle (10) and the direct current nozzle (11).

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