Coal blending device

Abstract

The invention relates to a coal blending device which comprises symmetrically arranged vertical plates, bottom plates fixedly arranged at the bottoms of the vertical plates, a mounting frame fixedly arranged between the bottom plates on the two sides, a plurality of coal blending assemblies arranged in the mounting frame and a bottom hopper fixedly arranged between the vertical plates on the two sides, and the bottom hopper is located below the coal blending assemblies. A discharging opening is formed in the bottom of the bottom hopper, and the coal blending assembly comprises a shell arranged in the mounting frame, a discharging hopper fixedly arranged at the bottom of the shell in a communicating mode, a feeding hopper fixedly arranged at the top of the shell in a communicating mode and a material scattering assembly arranged on the discharging hopper. According to the coal discharging device, the material dredging plate is driven by the power assembly to slide up and down in the discharging hopper along the sliding groove in a reciprocating mode, and the multiple dredging strips arranged on the side wall of the material dredging plate at intervals are matched, so that the phenomena of accumulation and blockage of coal in the discharging process can be prevented, and the coal can evenly and smoothly fall into the bottom hopper from the discharging hopper and then be discharged through the discharging port.

Description

Technical Field

[0001] This invention relates to the field of coal blending, and in particular to a coal blending device. Background Technology

[0002] As the core power equipment of a power plant, the stability and economy of boiler operation directly affect the safety and efficiency of the entire power plant. To adapt to changes in the coal market, reduce fuel costs, and improve resource utilization, blending and co-firing coals from different origins and with different properties (i.e., co-firing technology) has become a common choice for power plants. The basic principle of this technology is to scientifically proportion the blended coal so that its comprehensive performance indicators (such as calorific value, volatile matter, sulfur content, ash content, and ash fusion point) are close to those of the coal used in the boiler's design, thereby maintaining boiler efficiency and output.

[0003] Existing coal blending equipment is prone to serious blockages in multiple parts of the equipment during operation, especially when using coal with uneven particle size. Summary of the Invention

[0004] In view of this, the present invention aims to provide a coal blending device to solve the problems in the prior art.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows: This invention discloses a coal blending device, comprising symmetrically arranged vertical plates, a base plate fixedly disposed at the bottom of the vertical plates, a mounting frame fixedly disposed between the two base plates, a plurality of coal blending components disposed within the mounting frame, and a bottom hopper fixedly disposed between the two vertical plates. The bottom hopper is located below the coal blending components, and a discharge port is provided at the bottom of the bottom hopper. The coal blending components include a housing disposed within the mounting frame, a feeding hopper fixedly connected to the bottom of the housing, a feeding hopper fixedly connected to the top of the housing, and a material discharge component disposed within the feeding hopper. The material unloading assembly is symmetrically arranged on both sides of the hopper. It includes a groove formed on the side wall of the hopper, a connecting plate slidably disposed in the groove, and a material unloading plate fixedly disposed at the end of the connecting plate and located in the hopper. The material unloading plate is in contact with the inner side wall of the hopper. The side wall of the hopper is provided with a power assembly that drives the connecting plate to slide in the groove. Multiple unloading strips are spaced apart on the side wall of the material unloading plate.

[0006] Furthermore, the power assembly includes a first motor fixedly mounted on the hopper, a first fixing plate fixedly mounted on the side wall of the hopper above the chute, a second fixing plate fixedly mounted on the side wall of the hopper below the chute, and a fixing block fixedly mounted on the end of the connecting plate. A screw is provided between the first fixing plate and the second fixing plate, one end of the screw is rotatably connected to the first fixing plate, and the other end is rotatably connected to the second fixing plate. The fixing block is screwed to the screw. The first motor is fixedly mounted on the side wall of the first fixing plate, and its output shaft is fixedly connected to the screw.

[0007] Furthermore, a movable plate is hinged inside the unloading plate, and an inner hole is provided on the unloading plate for the extension plate to extend out. One end of the extension plate is hinged to the bottom surface of the movable plate, and the other end is connected to the vibration motor. The vibration motor is mounted on a baffle plate, and the baffle plate is fixedly disposed on the part of the connecting plate located outside the hopper.

[0008] Furthermore, the housing is also provided with a crushing component, which includes a rotating shaft and a striking part. Multiple rotating shafts are spaced apart and are rotatably connected to the inner sidewall of the housing at both ends. The striking parts are uniformly fixed on the outer circumference of the rotating shafts. The rotating shafts are connected to a drive component.

[0009] Furthermore, the drive assembly includes gears and a third motor. The gears are fixedly mounted at the end of the rotating shaft extending out of the housing, and the gears mesh with each other. The third motor is fixedly mounted on the outer wall of the housing, and its output shaft is fixedly connected to the end of the rotating shaft.

[0010] Furthermore, the axis connecting each of the rotating shafts is arc-shaped, with the arc opening facing upwards.

[0011] Furthermore, the housing is also provided with a dust suppression assembly, which includes an air suction hood, a dust suppression chamber, and a water storage chamber. The air suction hood is connected and disposed at the upper position of the housing. The dust suppression chamber is fixedly disposed on the side wall of the housing by a mounting sleeve. The other end of the air suction hood is connected to the dust suppression chamber. The water storage chamber is fixedly disposed at the top of the dust suppression chamber. A placement chamber connected to the water storage chamber is fixedly disposed at the top of the dust suppression chamber. Multiple nozzles are spaced apart at the bottom of the placement chamber. A fan is disposed in the dust suppression chamber. A water pump is disposed in the water storage chamber. A grid is fixedly disposed at the end of the air suction hood located inside the housing.

[0012] Furthermore, the hopper is equipped with a stirring assembly, which includes a mounting plate fixedly mounted on the top of the hopper, a second motor fixedly mounted on the mounting plate, and a stirring roller fixedly mounted on the output shaft of the second motor.

[0013] Compared with the prior art, the present invention has the following advantages: In this invention, the feed plate, driven by the power assembly, slides up and down along the chute in the feed hopper. With the help of multiple guide strips spaced apart on the side wall of the feed plate, it can prevent the accumulation and blockage of coal during the feeding process, so that the coal can fall evenly and smoothly from the feed hopper into the bottom hopper and then be discharged through the discharge port. This improves the uniformity of coal blending and provides a stable raw material for subsequent combustion or processing. Attached Figure Description

[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the shell structure of the present invention; Figure 3 This is a schematic diagram of the crushing component structure of the present invention; Figure 4 This is a schematic diagram of the dust suppression component structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the dust collection chamber of the present invention; Figure 6 This is a schematic diagram of the material feeding plate structure of the present invention; Figure 7 This is a schematic diagram of the power component structure of the present invention; Figure 8 This is a schematic diagram of the inner hole and extension plate structure of the present invention; Figure 9 This is a schematic diagram of the vibration motor structure of the present invention; Figure 10 This is a schematic diagram of the bucket structure of the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Vertical plate; 101. Mounting frame; 102. Base plate; 2. Shell; 201. Feed hopper; 202. Discharge hopper; 2021. Slide groove; 3. Rotating shaft; 301. Striking part; 4. Gear; 401. Third motor; 5. Suction hood; 501. Dust settling chamber; 502. Water storage chamber; 503. Placement chamber; 504. Nozzle; 505. Grid mesh; 506. Mounting sleeve; 6. First motor; 601, First fixing plate; 602, Second fixing plate; 603, Screw; 604, Fixing block; 7, Discharge plate; 701, Movable plate; 702, Inner hole; 703, Guide strip; 8, Connecting plate; 801, Baffle plate; 9, Extension plate; 901, Vibrating motor; 10, Bucket; 1001, Mounting plate; 1002, Second motor; 1003, Agitating roller; 1004, Discharge port. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0017] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0019] The following will refer to the appendix. Figures 1 to 10 The present invention will be described in detail with reference to the embodiments.

[0020] Overall, the present invention proposes a coal blending device, including symmetrically arranged vertical plates 1, a bottom plate 102 fixedly disposed at the bottom of the vertical plates 1, a mounting frame 101 fixedly disposed between the two bottom plates 102, a plurality of coal blending components disposed within the mounting frame 101, and a bottom hopper 10 fixedly disposed between the two vertical plates 1. The bottom hopper 10 is below the coal blending components, and a discharge port 1004 is opened at the bottom of the bottom hopper 10. The coal blending components include a housing 2 disposed within the mounting frame 101, a feeding hopper 202 fixedly connected to the bottom of the housing 2, a feeding hopper 201 fixedly connected to the top of the housing 2, and a material discharge component disposed in the feeding hopper 202. The material unloading assembly is symmetrically arranged on both sides of the hopper 202. It includes a chute 2021 opened on the side wall of the hopper 202, a connecting plate 8 slidably disposed in the chute 2021, and a material unloading plate 7 fixedly disposed at the end of the connecting plate 8 and located in the hopper 202. The material unloading plate 7 contacts the inner side wall of the hopper 202. The side wall of the hopper 202 is provided with a power assembly that drives the connecting plate 8 to slide in the chute 2021. Multiple guide strips 703 are spaced apart on the side wall of the material unloading plate 7.

[0021] In this embodiment, the discharge plate 7, driven by the power component, slides up and down along the chute 2021 in the discharge hopper 202. In conjunction with the multiple guide strips 703 spaced apart on the side wall of the discharge plate 7, it can prevent the accumulation and blockage of coal during the feeding process, so that the coal can fall evenly and smoothly from the discharge hopper 202 into the bottom hopper 10, and then be discharged through the discharge port 1004. This improves the uniformity of coal blending and provides a stable raw material for subsequent combustion or processing.

[0022] In addition, different coal blending components can work independently or be combined and adjusted according to actual needs, and can adapt to the blending requirements of various types and particle sizes of coal.

[0023] In practice, different types or proportions of coal are prepared separately and, according to a pre-set coal blending scheme, are fed into the housings 2 of each coal blending component. Under gravity, the coal gradually accumulates in the feeding hopper 202, awaiting discharge. The power assembly is activated, and as the connecting plate 8 slides, the discharge plate 7, fixed to the end of the connecting plate 8, moves synchronously within the feeding hopper 202. The discharge plate 7 moves up and down within the feeding hopper 202, and multiple guide strips 703 on its sidewall continuously contact the coal, agitating and guiding it. The guide strips 703 increase the contact area and friction with the coal, dispersing the accumulated coal and pushing it towards the outlet of the feeding hopper 202.

[0024] Furthermore, the bottom hopper 10 serves as a temporary storage and buffer, allowing coal to be collected in a concentrated manner. As coal continuously falls in, the amount of coal in the bottom hopper 10 gradually increases, and finally, it is discharged through the discharge port 1004 at the bottom of the bottom hopper 10 at a certain flow rate and speed, completing the entire coal blending process.

[0025] Among them, such as Figure 7 As shown, the aforementioned power assembly includes a first motor 6 fixedly mounted on the hopper 202, a first fixing plate 601 fixedly mounted on the side wall of the hopper 202 above the slide 2021, a second fixing plate 602 fixedly mounted on the side wall of the hopper 202 below the slide 2021, and a fixing block 604 fixedly mounted on the end of the connecting plate 8. A screw 603 is provided between the first fixing plate 601 and the second fixing plate 602. One end of the screw 603 is rotatably connected to the first fixing plate 601, and the other end is rotatably connected to the second fixing plate 602. The fixing block 604 is screwed to the screw 603. The first motor 6 is fixedly mounted on the side wall of the first fixing plate 601, and its output shaft is fixedly connected to the screw 603.

[0026] In practice, the first motor 6 is started. Since the output shaft of the first motor 6 is fixedly connected to the screw 603, the screw 603 rotates synchronously under the support of the first fixing plate 601 and the second fixing plate 602. When the screw 603 rotates, a screw-connected transmission effect is generated between it and the fixing block 604. Since the fixing block 604 is fixedly mounted at the end of the connecting plate 8, and the connecting plate 8 is slidably mounted in the slide groove 2021, under the rotational force of the screw 603, the fixing block 604 moves linearly along the axial direction of the screw 603, thereby driving the connecting plate 8 to slide in the slide groove 2021. Depending on the rotation direction of the first motor 6, the connecting plate 8 can achieve reciprocating linear motion up and down in the slide groove 2021.

[0027] Based on the above settings, such as Figure 6 , Figure 8 and Figure 9 As shown, a movable plate 701 is hinged inside the unloading plate 7. The unloading plate 7 has an inner hole 702 for the extension plate 9 to extend out. One end of the extension plate 9 is hinged to the bottom surface of the movable plate 701, and the other end is connected to the vibration motor 901. The vibration motor 901 is mounted on the baffle plate 801. The baffle plate 801 is fixedly set on the part of the connecting plate 8 located outside the feed hopper 202.

[0028] Driven by the vibrating motor 901, the movable plate 701 can generate vibration. This vibration can be transmitted to the coal, causing relative movement between coal particles and breaking up the coal's agglomeration and accumulation.

[0029] It should be noted that, as Figure 1 and Figure 3As shown, the housing 2 is also provided with a crushing component, which includes a rotating shaft 3 and a striking part 301. Multiple rotating shafts 3 are spaced apart and are rotatably connected to the inner sidewall of the housing 2 at both ends. The striking parts 301 are uniformly fixed on the outer circumference of the rotating shafts 3. The rotating shafts 3 are connected to the drive component.

[0030] The crushing assembly can effectively crush large pieces of coal entering the housing 2. The rotating shaft 3 drives the impact unit 301 to rotate at high speed. When large pieces of coal pass through the crushing area, the impact unit 301 will strike the coal with a strong impact force, crushing the large pieces of coal into smaller particles. This ensures that coals from different sources and of different particle sizes achieve a relatively uniform particle size distribution before blending, thereby improving the uniformity and stability of subsequent blending.

[0031] like Figure 3 As shown, the drive assembly includes a gear 4 and a third motor 401. The gear 4 is fixedly mounted at the end of the rotating shaft 3 that extends out of the housing 2, and the gears 4 mesh with each other. The third motor 401 is fixedly mounted on the outer wall of the housing 2, and its output shaft is fixedly connected to the end of the rotating shaft 3.

[0032] Furthermore, when the third motor 401 is started, its output shaft begins to rotate. Since it is fixedly connected to the end of one of the rotating shafts 3, that shaft 3 also begins to rotate. Due to the meshing of the gears 4, the rotation of the shaft 3 drives the other rotating shafts 3 to rotate synchronously through the transmission of the gears 4. As the rotating shaft 3 rotates steadily, the striking part 301 fixed on the rotating shaft 3 begins to move at high speed, striking and crushing the coal that has entered the crushing zone.

[0033] As a preferred option, such as Figure 2 and Figure 3 As shown, the lines connecting the axes of each rotating shaft 3 are arc-shaped, with the arc opening facing upwards. This configuration, where the axes of each rotating shaft 3 are arc-shaped with the arc facing upwards, allows the striking parts 301 fixed to the rotating shaft 3 to form an arc-shaped crushing surface during operation. This provides a larger crushing area and reduces dead zones. When coal enters the crushing area from above, the arc-shaped striking parts 301 can strike the coal from different angles, enabling more comprehensive and uniform crushing, thereby improving the crushing effect.

[0034] As a preferred structure in this embodiment, such as Figure 4As shown, the housing 2 is also provided with a dust suppression assembly, which includes an air suction hood 5, a dust suppression chamber 501, and a water storage chamber 502. The air suction hood 5 is connected and disposed at the upper position of the housing 2. The dust suppression chamber 501 is fixedly disposed on the side wall of the housing 2 by a mounting sleeve 506. The other end of the air suction hood 5 is connected to the dust suppression chamber 501. The water storage chamber 502 is fixedly disposed at the top of the dust suppression chamber 501. A placement chamber 503 connected to the water storage chamber 502 is fixedly disposed at the top of the dust suppression chamber 501. Multiple nozzles 504 are spaced apart at the bottom of the placement chamber 503. A fan is disposed in the dust suppression chamber 501. A water pump is disposed in the water storage chamber 502. A grid 505 is fixedly disposed at the end of the air suction hood 5 located inside the housing 2.

[0035] If the dust generated during coal blending is not effectively controlled, it will permeate the interior of the equipment and the surrounding environment. This dust will adhere to various components of the equipment, such as motors, gears, and bearings, accelerating wear and corrosion, and affecting the normal operation and service life of the equipment. Dust suppression components can effectively reduce the dust concentration in the environment and reduce the erosion of the equipment by dust.

[0036] When coal generates dust inside the shell 2, the suction hood 5, located at the upper part of the shell 2, begins to operate. A fan creates negative pressure within the dust settling chamber 501, drawing air and dust from the shell 2 into the dust settling chamber 501 through the suction hood 5. A baffle 505 first performs preliminary filtration of the drawn-in air and dust. A water pump in the water storage chamber 502 starts, delivering water to the placement chamber 503, which is then evenly sprayed out through multiple nozzles 504, forming a water mist. The dust drawn into the dust settling chamber 501 comes into contact with the water mist and settles to the bottom of the dust settling chamber 501.

[0037] In addition, such as Figure 10 As shown, the hopper 202 is equipped with a stirring assembly, which includes a mounting plate 1001 fixedly mounted on the top of the hopper 202, a second motor 1002 fixedly mounted on the mounting plate 1001, and a stirring roller 1003 fixedly mounted on the output shaft of the second motor 1002.

[0038] It should be further explained that during the process of coal falling through the feed hopper 202, due to differences in particle size, moisture content, and other characteristics, material accumulation can easily occur, leading to poor feeding or even blockage. The mixing roller 1003 in the mixing assembly rotates under the drive of the second motor 1002, which can continuously mix the material in the feed hopper 202, ensuring that the material is fully mixed and flows, preventing excessive material accumulation and blockage of the feed hopper 202.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coal blending device characterized in that: it comprises symmetrically arranged vertical plates (1), bottom plates (102) fixedly arranged at the bottom of the vertical plates (1), mounting frames (101) fixedly arranged between the two side bottom plates (102), a plurality of coal blending assemblies arranged in the mounting frames (101), and a bottom hopper (10) fixedly arranged between the two side vertical plates (1), the bottom hopper (10) being below the coal blending assemblies, a discharge port (1004) being formed at the bottom of the bottom hopper (10), the coal blending assembly comprising a shell (2) arranged in the mounting frame (101), a lower discharge hopper (202) fixedly and communicatively arranged at the bottom of the shell (2), an upper feed hopper (201) fixedly and communicatively arranged at the top of the shell (2), and a material loosening assembly arranged in the lower discharge hopper (202); the material loosening assembly is symmetrically arranged on the two side walls of the lower discharge hopper (202) and comprises a chute (2021) formed in the side wall of the lower discharge hopper (202), a connecting plate (8) slidingly arranged in the chute (2021), and a material loosening plate (7) fixedly arranged at the end of the connecting plate (8) and located in the lower discharge hopper (202), the material loosening plate (7) being in contact with the inner side wall of the lower discharge hopper (202), the side wall of the lower discharge hopper (202) being provided with a power assembly for driving the connecting plate (8) to slide in the chute (2021), and a plurality of loosening strips (703) being arranged at intervals on the side wall of the material loosening plate (7).

2. The coal blending device according to claim 1, characterized in that: the power assembly comprises a first motor (6) fixedly arranged in the lower discharge hopper (202), a first fixed plate (601) fixedly arranged on the side wall of the lower discharge hopper (202) above the chute (2021), a second fixed plate (602) fixedly arranged on the side wall of the lower discharge hopper (202) below the chute (2021), and a fixed block (604) fixedly arranged at the end of the connecting plate (8), a screw rod (603) being arranged between the first fixed plate (601) and the second fixed plate (602), one end of the screw rod (603) being rotatably connected with the first fixed plate (601) and the other end being rotatably connected with the second fixed plate (602), and the fixed block (604) being screwed with the screw rod (603); the first motor (6) is fixedly arranged on the side wall of the first fixed plate (601), the output shaft of the first motor (6) being fixedly connected with the screw rod (603).

3. The coal blending device according to claim 1, characterized in that: the material loosening plate (7) is hingedly connected with a movable plate (701), an inner hole (702) is formed in the material loosening plate (7) for the extension plate (9) to extend out, one end of the extension plate (9) is hingedly connected with the bottom surface of the movable plate (701), the other end is connected with a vibration motor (901), the vibration motor (901) is mounted on a shielding plate (801), and the shielding plate (801) is fixedly arranged on the part of the connecting plate (8) located outside the lower discharge hopper (202). ​ ​ ​ 4. The coal blending device according to claim 1, characterized in that: The shell (2) is further provided with a crushing assembly, the crushing assembly comprises a rotating shaft (3) and a hitting part (301), the rotating shaft (3) is provided in plurality with interval, and both ends are rotationally connected with the inner side wall of the shell (2), the hitting part (301) is uniformly fixed on the outer circumference of the rotating shaft (3), and the rotating shaft (3) is connected with a driving assembly.

5. The coal blending device according to claim 4, characterized in that: The driving assembly comprises a gear (4) and a third motor (401), the gear (4) is fixed on the end of the rotating shaft (3) extending out of the shell (2), the gears (4) are meshed with each other, and the third motor (401) is fixed on the outer side wall of the shell (2), and the output shaft is fixedly connected with the end of the rotating shaft (3).

6. The coal blending device according to claim 4, characterized in that: The connecting lines of the axes of the rotating shafts (3) are in arc shape, and the opening of the arc is upward.

7. The coal blending device according to claim 1, characterized in that: The shell (2) is further provided with a dust falling assembly, the dust falling assembly comprises a suction cover (5), a dust falling cavity (501) and a water storage cavity (502), the suction cover (5) is communicated and arranged at the upper position of the shell (2), the dust falling cavity (501) is fixedly arranged on the side wall of the shell (2) through a mounting sleeve (506), the other end of the suction cover (5) is communicated with the dust falling cavity (501), the water storage cavity (502) is fixedly arranged on the top of the dust falling cavity (501), a placing cavity (503) in communication with the water storage cavity (502) is fixedly arranged on the top of the dust falling cavity (501), a plurality of nozzles (504) are arranged on the bottom of the placing cavity (503) with interval, and a fan is arranged in the dust falling cavity (501).

8. The coal blending device according to claim 1, characterized in that: The discharging hopper (202) is provided with a stirring assembly, the stirring assembly comprises a mounting plate (1001) fixedly arranged on the top of the discharging hopper (202), a second motor (1002) fixedly arranged on the mounting plate (1001), and a stirring roller (1003) fixedly arranged on the output shaft of the second motor (1002).

9. The coal blending device according to claim 7, characterized in that: The water storage cavity (502) is provided with a water pump.

10. The coal blending device according to claim 7, characterized in that: The end of the suction cover (5) located in the shell (2) is fixedly provided with a barrier net (505).

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