Coking coal preparation blending device

Abstract

The utility model discloses a blending device for coking coal preparation, which comprises a matching coal bunker and a blending mechanism, and the matching coal bunker is used for storing matched and crushed mixed coal; a discharge port of the matching coal bunker is connected with a feed port at the upper end of the uniform mixing mechanism through the conveying mechanism; the uniform mixing mechanism comprises a blanking pipe, a lower port of the blanking pipe is connected with an air chamber, the blanking pipe is located on one side of the top end of the air chamber, an air opening is formed in the inner wall of the side, close to the lower port of the blanking pipe, of the air chamber, and the air opening is used for being communicated with an air source and horizontally supplying air in the length direction of the air chamber; an opening in the bottom end of the air chamber is arranged to be a discharging opening, a material uniformizing mechanism is arranged below the discharging opening, the discharging end of the material uniformizing mechanism is connected with the feeding end of a stirring and mixing bin, and the material uniformizing mechanism is used for receiving discharged materials of the air chamber and conveying the discharged materials to the stirring and mixing bin at a constant speed in the air supply direction in the air chamber. The coal crusher ensures that various coals are fully and uniformly mixed while ensuring that the crushing degrees of various coals are consistent.

Description

Technical Field

[0001] This utility model relates to the technical field of coking coal preparation equipment, and in particular to a coking coal preparation mixing device. Background Technology

[0002] Coal preparation is a key process in coking. Usually, the required types of coal are mixed in proportion and then pulverized to achieve uniformity. However, since the mixed coal is a granular solid, the friction between the particles is relatively large, and sufficient stirring time is required to achieve a better mixing effect. However, since the hardness, particle size, and cohesiveness of the various coals are different, excessively long pulverization and mixing time may lead to over-pulverization of some coals, while insufficient time will not achieve sufficient mixing, both of which will affect the quality of coking. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a coking coal preparation mixing device that ensures that the crushing degree of various coals is consistent while ensuring that multiple coals are fully mixed.

[0004] Technical solution: To achieve the above objectives, this utility model provides a coking coal preparation and blending device, which includes a coal preparation bin and a blending mechanism. The coal preparation bin is used to store the prepared and crushed mixed coal. The outlet of the coal preparation bin is connected to the upper inlet of the blending mechanism through a conveying mechanism.

[0005] The mixing mechanism includes a discharge pipe, the lower end of which is connected to an air chamber. The discharge pipe is located on one side of the top of the air chamber. An air vent is provided on the inner wall of the air chamber near the lower end of the discharge pipe. The air vent is used to connect to a ventilation source and deliver air horizontally along the length of the air chamber.

[0006] The bottom opening of the air chamber is set as a material discharge port, and a material leveling mechanism is set below the material discharge port. The discharge end of the material leveling mechanism is connected to the inlet end of the mixing chamber. The material leveling mechanism is used to receive the material from the air chamber and uniformly convey the material to the mixing chamber along the air supply direction inside the air chamber.

[0007] Furthermore, the material discharge port of the air chamber is provided with partition plates at equal intervals along the air supply direction.

[0008] Furthermore, the bottom end of the discharge pipe is connected to multiple air chambers, which are equidistantly arranged around the same air source, and the air delivery direction of the multiple air chambers is diverging along the radius of a circle centered on the air source.

[0009] Furthermore, a spraying mechanism is provided in the middle section of the material discharge pipe, which is used to evenly distribute the material in the upper section of the material discharge pipe into multiple air chambers at its lower end.

[0010] Furthermore, the discharge ports of the multiple air chambers are all located on the upper surface of the mixing chamber, and the multiple discharge ports are arranged around the vertical axis of the mixing chamber; a stirring mechanism is rotatably arranged inside the mixing chamber around the vertical axis, and the top of the stirring mechanism is fixedly connected to the material distribution mechanism, which is a material distribution plate, and a material discharge gap is left between the edge of the material distribution plate and the wall of the mixing chamber.

[0011] Furthermore, the upper surface of the fabric tray is a pointed conical tray with a gentle slope.

[0012] Beneficial Effects: This utility model discloses a coking coal mixing device. After mixing various types of coal according to a preset ratio, each type is crushed into approximately the same particle size, then mixed and stored in a coal mixing bin. The mixed coal is then conveyed at a uniform speed to the upper end of a discharge pipe by a conveyor belt or screw conveyor, ensuring that the coal is dispersed within the discharge pipe. After falling into the air chamber, the coal passes longitudinally through a horizontal airflow field, allowing coals of different densities to be layered sequentially, with later layers evenly distributed in the gaps between earlier layers. This achieves the goal of first screening by mass, then layering and mixing sequentially, and finally conveying to a mixing chamber for further agitation to ensure thorough mixing. This ensures that the various coal types are crushed to a uniform degree while guaranteeing thorough mixing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a coking coal preparation and blending device.

[0014] Figure 2 This is a schematic diagram of the overall structure of the mixing mechanism, the material homogenizing mechanism, and the stirring chamber according to an embodiment of the present invention. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] As attached Figure 1-2 A coking coal preparation and blending device includes a coal bin 1 and a blending mechanism 2. The coal bin 1 is used to store the blended and crushed coal. The outlet of the coal bin 1 is connected to the upper inlet of the blending mechanism 2 via a conveying mechanism 3. The blending mechanism 2 includes a discharge pipe 4, the lower end of which is connected to an air chamber 5. The discharge pipe 4 is located on one side of the top of the air chamber 5. An air outlet 6 is provided on the inner wall of the air chamber 5 near the lower end of the discharge pipe 4. The air outlet 6 is used to connect to a ventilation source 50 and to deliver air horizontally along the length of the air chamber 5. The bottom opening of the air chamber 5 is set as a discharge port 51. A blending mechanism 7 is provided below the discharge port 51. The discharge end of the blending mechanism 7 is connected to the inlet end of a mixing bin 8. The blending mechanism 7 is used to receive the material from the air chamber 5 and to uniformly convey the material to the mixing bin 8 along the air delivery direction inside the air chamber 5.

[0017] This method involves mixing various types of coal according to a preset ratio, crushing them into roughly the same particle size, and then storing the mixture in a coal bin. A conveyor belt or screw conveyor then uniformly transports the mixed coal to the top of the discharge pipe, ensuring the coal is dispersed within the pipe. After falling into the air chamber, the coal passes longitudinally through the horizontal airflow. Because the coal particles are generally of similar size, lower density means lighter weight, causing the less dense particles to deviate further away from the air outlet. Therefore, the denser particles fall into the uniform feeder. Coal particles with lower density that land earlier on the material leveling mechanism 7 land on the material leveling mechanism 7 later. The material leveling mechanism 7 can be a conveyor belt, with the conveying direction aligned with the air supply direction. As the conveyor belt moves, coal particles of the same density are evenly laid along its forward direction. By controlling the conveyor belt's speed, coal particles of different densities are layered sequentially. Strict control of the material drop ensures dispersed drop, preventing the quantity of each density's coal particles from completely covering the conveyor belt. This allows the later-layered coal particles to be evenly distributed within the gaps between the previously laid particles. This process achieves the goal of first screening by mass, then sequentially layering and mixing, and finally conveying the mixture to the mixing chamber for further agitation to achieve thorough mixing.

[0018] The air chamber 5 has a material discharge port 51 with partition plates 52 arranged at equal intervals along the air supply direction. The partition plates divide the material discharge port into multiple sub-discharge ports of the same size along the air supply direction. The lower ends of the partition plates are flush, while the upper ends are arranged from near to far and from low to high according to the relative distance between the air outlets. This effectively limits the interception of the movement trajectory of coal within a certain density range, making the coal particles in each layer more uniform.

[0019] In a preferred embodiment, the bottom end of the discharge pipe 4 is connected to multiple air chambers 5 to improve mixing efficiency. The multiple air chambers 5 are equidistantly arranged around the same air source 50, ensuring consistent airflow intensity and density sieving effect in each chamber. The airflow direction of the multiple air chambers 5 is radiating outwards along the radius of a circle centered on the air source 50. This creates a discharge distribution trend where the density gradually decreases from the center outwards. The corresponding uniform material distribution mechanism 7 also conveys the discharge material at a uniform speed along the direction from the center outwards, achieving a uniform mixing effect.

[0020] A spreading mechanism 9 is provided in the middle section of the material feeding pipe 4. This spreading mechanism 9 is used to evenly distribute the material falling from the upper section of the material feeding pipe 4 into multiple air chambers 5 at its lower end. The spreading mechanism 9 can be a rotating structure or a fixed diversion structure. For example, when the material feeding pipe is eccentrically fed, a rotating spreading structure is used. Multiple buffer hoppers evenly distributed around the rotating axis pass through the feeding point sequentially under the uniform rotation of the axis, receiving a certain amount of material, and evenly distributing it to the lower section of the material feeding pipe during subsequent rotations. When the material feeding pipe is centrally fed, a pointed conical guide surface is fixed at the center of the pipe, and diversion plates are arranged radially to form multiple evenly distributed annular guide channels. This disperses the coal falling in the center of the pointed conical guide surface evenly to the surrounding areas before it falls into the lower air chambers, ensuring even distribution of material to multiple air chambers.

[0021] Multiple material discharge ports 51 of the air chambers 5 are located on the upper surface of the mixing chamber 8, and the multiple material discharge ports 51 are arranged around the vertical axis of the mixing chamber 8. A stirring mechanism 81 is rotatably installed inside the mixing chamber 8 around the vertical axis. The top of the stirring mechanism 81 is fixedly connected to the material distribution mechanism 7, which is a material distribution plate. A material discharge gap is left between the edge of the material distribution plate and the wall of the mixing chamber 8. The stirring mechanism drives the material distribution plate to rotate. Under the action of centrifugal force, the coal material on the material distribution plate moves from the center to the surrounding area, completing the layering and mixing during the movement. Finally, it falls from the outer material discharge gap into the mixing area below, where it is further mixed by the stirring mechanism. Then it is stored for later use.

[0022] The upper surface of the feeding disc is a gently sloping, pointed cone. This aids in the centrifugal motion of the coal, allowing for a reduced rotational speed of the feeding disc. This meets the slow mixing requirements of the lower mixing zone, preventing excessive mechanical stress on the mixing mechanism, reducing power consumption and wear, and thus lowering maintenance costs. The feeding disc is designed to be as large as possible, ensuring a sufficient transition area for even distribution of the coal. This results in better mixing, reduces the final mixing time, and improves work efficiency.

[0023] The above are merely preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A coking coal blending device, characterized by: It includes a coal bin (1) and a mixing mechanism (2). The coal bin (1) is used to store the mixed coal material that has been mixed and crushed. The outlet of the coal bin (1) is connected to the upper inlet of the mixing mechanism (2) through a conveying mechanism (3). The mixing mechanism (2) includes a discharge pipe (4), the lower end of which is connected to a wind chamber (5). The discharge pipe (4) is located on one side of the top of the wind chamber (5). An air outlet (6) is provided on the inner wall of the wind chamber (5) near the lower end of the discharge pipe (4). The air outlet (6) is used to connect to a ventilation source (50) and deliver air horizontally along the length of the wind chamber (5). The bottom opening of the air chamber (5) is set as a material discharge port (51). A material leveling mechanism (7) is provided below the material discharge port (51). The discharge end of the material leveling mechanism (7) is connected to the inlet end of the mixing chamber (8). The material leveling mechanism (7) is used to receive the material from the air chamber (5) and uniformly convey the material to the mixing chamber (8) along the air supply direction inside the air chamber (5).

2. The coal blending device for coking according to claim 1, characterized in that: The air chamber (5) has a material discharge port (51) with partition plates (52) arranged at equal intervals along the air supply direction.

3. The blending device for coking coal according to claim 2, characterized in that: The bottom end of the material discharge pipe (4) is connected to multiple air chambers (5). The multiple air chambers (5) are arranged equidistantly around the same air source (50). The air delivery direction of the multiple air chambers (5) is arranged along the radius of a circle with the air source (50) as the center.

4. The coal blending device for coking according to claim 3, characterized in that: The middle section of the discharge pipe (4) is provided with a spraying mechanism (9), which is used to evenly distribute the material in the upper section of the discharge pipe (4) into the multiple air chambers (5) at its lower end.

5. A blending device for coking coal according to claim 4, characterized in that: The discharge ports (51) of the multiple air chambers (5) are all located on the upper surface of the mixing chamber (8), and the multiple discharge ports (51) are arranged around the vertical axis of the mixing chamber (8); a stirring mechanism (81) is rotatably arranged inside the mixing chamber (8) around the vertical axis, and the top of the stirring mechanism (81) is fixedly connected to the material distribution mechanism (7), which is a material distribution plate, and a material discharge gap is left between the edge of the material distribution plate and the wall of the mixing chamber (8).

6. A blending device for coking coal according to claim 5, characterized in that: The upper surface of the fabric tray is a pointed conical surface with a gentle slope.

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