Coal slime drying and mixing device for reproduction of coal slime

Abstract

The utility model relates to a coal slime drying and mixing device for reproduction of coal slime. The device comprises a conveying cylinder and a mixing cylinder, wherein a discharge port of the conveying cylinder is positioned inside the mixing cylinder. And a conveying auger is arranged in the conveying cylinder. An electric heating wire is wound on the outer wall of the conveying cylinder and covered with a heat preservation layer. An exhaust pipe is arranged at the top of the mixing barrel; and an air pump is arranged on the exhaust pipe. And a raw coal inlet for raw coal and a binder to enter is formed in the mixing barrel. A discharging opening is formed in the lower end of the mixing barrel, a first material guide plate is arranged below the discharging opening in the mixing barrel, a second material guide plate is arranged below the raw coal inlet, and a gap between the lower ends of the first material guide plate and the second material guide plate forms a mixing channel. And a rotary material mixing plate is arranged below the material mixing channel in the material mixing barrel. Compared with the prior art, an additional transfer mechanism for assembling drying equipment and mixing equipment is not needed, direct drying and mixing can be carried out at the same time, and the device is small in overall occupied area and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of mixing devices, in particular to a coal slime drying and mixing device for coal slime reproduction. Background Art

[0002] Coal slime is a waste mixture of pulverized coal and water produced during the coal washing process. Due to its high moisture content, high viscosity, high water retention, and low calorific value, coal slime has been difficult to apply industrially and has long been rejected by power users, with its primary outlet being residential sales. Since the reform and opening up, the national economy has experienced rapid growth, with coal production now ranking first in the world, and the market landscape has undergone significant changes. The depth and breadth of coal processing are rapidly expanding, resulting in a significant increase in coal slime production. The comprehensive utilization of coal slime has become a pressing issue.

[0003] Using coal slime to reproduce and manufacture coal slime briquettes is an effective way to solve the problem of large-scale waste of coal slime. The method is to mix the coal slime into raw coal, and then make briquettes for export or provide them to industrial use, such as power plants or boiler plants. However, the humidity in the coal slime is relatively high, and the problem of agglomeration will occur. It needs to be broken up and dried to a certain extent so that it no longer agglomerates. Then it needs to be mixed with raw coal and a binder to ensure uniform mixing and sufficient combustion of the briquettes in the later stage. Existing coal slime processing equipment either dries or mixes, and it is impossible to dry and reproduce the mixing of coal slime at the same time. Since it is designed to operate independently, it is impossible to effectively combine the two directly for use, resulting in the dried coal slime material being transported to the mixing equipment through a transfer mechanism, which not only occupies a large area and has high cost, but is also inconvenient to use. Utility Model Content

[0004] The purpose of the utility model is to provide a coal slime drying and mixing device for coal slime reproduction, so as to solve the technical problems in the prior art that separate drying equipment and mixing equipment cannot be directly combined for use, and an additional transfer mechanism is required, resulting in a large footprint and inconvenient use.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a coal slime drying and mixing device for coal slime reproduction of the utility model adopts the following technical scheme: a coal slime drying and mixing device for coal slime reproduction, comprising a horizontally arranged conveying drum and a vertically arranged mixing drum, the feeding end of the conveying drum is provided with a coal slime inlet, the discharging end of the conveying drum is provided with a discharge port and is located inside the mixing drum; a conveying dragon is provided inside the conveying drum; an electric heating wire is wrapped around the outer wall of the conveying drum, and the electric heating wire is covered with an insulation layer; an exhaust pipe is provided on the top of the mixing drum, and an air pump is provided on the exhaust pipe; a raw coal inlet for raw coal and binder to enter is provided on the mixing drum; a discharge port is provided at the lower end of the mixing drum, a first guide plate is provided below the discharge port, and a second guide plate is provided below the raw coal inlet inside the mixing drum, and the gap between the lower ends of the first and second guide plates forms a mixing channel; a rotating mixing plate is provided below the mixing channel in the mixing drum.

[0006] The conveying dragon comprises a rotating shaft and conveying blades, and a plurality of crushing rods are arranged on the rotating shaft at intervals along the length direction thereof.

[0007] The upper end of the first guide plate is hinged to the wall of the mixing barrel, and a first driving cylinder is arranged between the wall of the mixing barrel and the first guide plate. The cylinder body of the first driving cylinder is hinged to the wall of the mixing barrel, and the end of the piston rod is hinged to the first guide plate.

[0008] The upper end of the second guide plate is hinged to the wall of the mixing barrel, and a second driving cylinder is arranged between the wall of the mixing barrel and the second guide plate. The cylinder body of the second driving cylinder is hinged to the wall of the mixing barrel, and the end of the piston rod is hinged to the second guide plate.

[0009] A partition is provided above the first and second guide plates in the mixing barrel to divide the upper part of the mixing barrel into a first cavity and a second cavity. The discharge port and the air extraction pipe of the conveying barrel are connected to the first cavity, and the raw coal inlet is connected to the second cavity.

[0010] The rotary mixing plate comprises a conical plate with its tip facing the mixing channel. A mounting bracket is provided at the discharge port, a driving motor is provided on the mounting bracket, and the conical plate is connected to the motor shaft of the driving motor.

[0011] The mounting frame comprises a mounting block and connecting rods which are circumferentially spaced apart and arranged on the mounting block, and the driving motor is fixed on the mounting block.

[0012] A conveyor belt is provided below the mixing drum, and a plurality of dividing baffles are provided at intervals on the conveyor belt.

[0013] The beneficial effects of the present invention are as follows: the coal slime is conveyed and dried in the mixing barrel, and the air containing a large amount of water vapor is discharged through the exhaust pipe. The dried coal slime enters the mixing barrel from the discharge port and falls onto the first guide plate. The raw coal and binder are fed from the raw coal inlet and fall onto the second guide plate. The dried coal slime, raw coal, and binder fall downward together in the mixing channel and are thoroughly mixed by the rotating mixing plate to ensure a uniform mixture. Compared with the existing technology, there is no need for an additional transfer mechanism to assemble the drying equipment and mixing equipment. Drying and mixing can be carried out directly at the same time. The overall device occupies a small area, is easy to use, and has a good promotion prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of an embodiment of a coal slime drying and mixing device for coal slime reproduction according to the present invention;

[0015] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the conveying cylinder and mixing cylinder. DETAILED DESCRIPTION

[0016] To facilitate understanding of the present invention, the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0017] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0018] An embodiment of a coal slime drying and mixing device for coal slime reproduction according to the present invention is as follows: Figure 1-Figure 2As shown, it includes a horizontally arranged conveying drum 1 and a vertically arranged mixing drum 2. The feed end of the conveying drum 1 is provided with a coal slurry inlet 3, and the discharge end of the conveying drum has a discharge port 16 and is located inside the mixing drum 2. The feed end of the conveying drum is fixed to the support frame 9 through a support plate 10, and the discharge end is fixed to the mixing drum. A driving motor 12 is provided on the support frame, and a driving pulley is provided on the motor shaft of the driving motor. A conveying dragon is provided inside the conveying drum. The conveying dragon includes a rotating shaft 17 and a conveying blade 18. A driven pulley is provided at one end of the rotating shaft. The driving pulley and the driven pulley transmit power through a transmission belt 13, so that the driving motor drives the conveying dragon to rotate. Since the coal slurry has a high moisture content and is easy to clump together, in this embodiment, a plurality of breaking rods 19 are provided on the rotating shaft at intervals along its length direction, which can break up the clumped coal slurry during the drying and conveying process.

[0019] The lower end of the mixing barrel is provided with a discharge port 30, and a conveyor belt 7 is provided below the mixing barrel, and a plurality of dividing baffles 8 are provided at intervals on the conveyor belt. The conveyor belt is installed on the conveyor belt frame 6, and the mixing barrel 2 is fixed to the conveyor belt frame through a fixing frame 11. An electric heating wire 14 is wound on the outer wall of the conveying barrel, and the electric heating wire is covered with an insulation layer 15. An exhaust pipe 5 is provided on the top of the mixing barrel, and an air pump is provided on the exhaust pipe. The electric heating wire can heat the conveying barrel when it is energized. The conveying barrel is made of a metal barrel with good thermal conductivity, which can quickly heat and dry the coal sludge in the conveying barrel, and then the gas containing water vapor is extracted by the air pump, and the gas enters from the coal sludge inlet.

[0020] The mixing drum is equipped with a raw coal inlet 4 for the raw coal and binder. Inside the mixing drum, a first guide plate 23 is located below the discharge port, and a second guide plate 25 is located below the raw coal inlet. The gap between the lower ends of the first and second guide plates forms a mixing channel 27. A partition 20 is located above the first and second guide plates within the mixing drum, dividing the upper portion of the mixing drum into a first cavity 21 and a second cavity 22. The discharge port and the exhaust pipe of the conveying drum are connected to the first cavity, while the raw coal inlet is connected to the second cavity. To prevent clogging of the mixing channel, both the first and second guide plates are equipped with movable plates. Specifically, the upper end of the first guide plate is hinged to the wall of the mixing drum. A first drive cylinder 24 is located between the mixing drum wall and the first guide plate. The cylinder body of the first drive cylinder is hinged to the wall of the mixing drum, and the end of the piston rod is hinged to the first guide plate. The upper end of the second guide plate is hinged to the wall of the mixing barrel. A second driving cylinder 26 is provided between the wall of the mixing barrel and the second guide plate. The cylinder body of the second driving cylinder is hinged to the wall of the mixing barrel, and the end of the piston rod is hinged to the second guide plate.

[0021] A rotating mixing plate 28 is located within the mixing barrel, below the mixing channel. This plate comprises a tapered plate with its tip facing the mixing channel. A mounting bracket is located at the feed opening, and a drive motor is mounted on the bracket. The tapered plate is connected to the motor shaft of the drive motor. The mounting bracket includes mounting blocks 29 and connecting rods spaced circumferentially on the mounting blocks. The drive motor is fixed to the mounting blocks.

[0022] During operation, the electric heating wire is preheated, and then the coal slurry to be dried and mixed is fed into the conveyor drum through the feed port. It is conveyed, heated, dried, and crushed in the conveyor drum. The dried coal slurry is discharged from the discharge port of the conveyor drum and falls onto the first guide plate. Raw coal and binder are fed into the raw coal inlet and fall onto the second guide plate. The dried coal slurry, raw coal, and binder are mixed together and fall downward through the oil mixing channel. The rotating mixing plate evenly disperses and mixes the falling mixture, and the final mixed material falls onto the conveyor belt below and enters the coal briquette manufacturing equipment.

[0023] In the above description of this specification, unless otherwise expressly specified or limited, terms such as "fixed," "mounted," "connected," or "connected" should be understood broadly. For example, the term "connected" can refer to a fixed connection, a removable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal connection between two components or the interaction between two components. Therefore, unless otherwise expressly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0025] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinal numbers are used for descriptive purposes only and should not be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, "plurality" means at least two, such as two, three or more, etc., unless otherwise clearly specified.

[0026] In other embodiments of the present invention, partitions may not be provided in the mixing barrel; the rotary mixing plate may also be a flat plate; one of the first guide plate and the second guide plate serves as the above-mentioned movable plate and is driven by the driving cylinder, and the other is made into a fixed plate; under the premise of not affecting the falling of the material, the first guide plate and the second guide plate may also be fixed plates.

Claims

1. A coal slime drying and mixing device for coal slime reproduction, characterized by: It includes a horizontally arranged conveying cylinder and a vertically arranged mixing cylinder, the feeding end of the conveying cylinder is provided with a coal slurry inlet, the discharging end of the conveying cylinder has a discharge port and is located inside the mixing cylinder; a conveying dragon is provided inside the conveying cylinder; an electric heating wire is wound on the outer wall of the conveying cylinder, and the electric heating wire is covered with an insulation layer; an exhaust pipe is provided on the top of the mixing cylinder, and an air pump is provided on the exhaust pipe; a raw coal inlet for raw coal and binder to enter is provided on the mixing cylinder; a discharge port is provided at the lower end of the mixing cylinder, and a first guide plate is provided below the discharge port and a second guide plate is provided below the raw coal inlet inside the mixing cylinder, and the gap between the lower ends of the first and second guide plates forms a mixing channel; a rotating mixing plate is provided below the mixing channel in the mixing cylinder.

2. The coal slime drying and mixing device for coal slime reproduction according to claim 1, characterized in that: The conveying dragon comprises a rotating shaft and conveying blades, and a plurality of crushing rods are arranged on the rotating shaft at intervals along the length direction thereof.

3. The coal slime drying and mixing device for coal slime reproduction according to claim 1, characterized in that: The upper end of the first guide plate is hinged to the wall of the mixing barrel, and a first driving cylinder is arranged between the wall of the mixing barrel and the first guide plate. The cylinder body of the first driving cylinder is hinged to the wall of the mixing barrel, and the end of the piston rod is hinged to the first guide plate.

4. The coal slime drying and mixing device for coal slime reproduction according to any one of claims 1 to 3, characterized in that: The upper end of the second guide plate is hinged to the wall of the mixing barrel, and a second driving cylinder is arranged between the wall of the mixing barrel and the second guide plate. The cylinder body of the second driving cylinder is hinged to the wall of the mixing barrel, and the end of the piston rod is hinged to the second guide plate.

5. The coal slime drying and mixing device for coal slime reproduction according to claim 1, characterized in that: A partition is provided above the first and second guide plates in the mixing barrel to divide the upper part of the mixing barrel into a first cavity and a second cavity. The discharge port and the air extraction pipe of the conveying barrel are connected to the first cavity, and the raw coal inlet is connected to the second cavity.

6. The coal slime drying and mixing device for coal slime reproduction according to claim 1, characterized in that: The rotary mixing plate comprises a conical plate with its tip facing the mixing channel. A mounting bracket is provided at the discharge port, a driving motor is provided on the mounting bracket, and the conical plate is connected to the motor shaft of the driving motor.

7. The coal slime drying and mixing device for coal slime reproduction according to claim 6, characterized in that: The mounting frame comprises a mounting block and connecting rods which are circumferentially spaced apart and arranged on the mounting block, and the driving motor is fixed on the mounting block.

8. The coal slime drying and mixing device for coal slime reproduction according to claim 1, characterized in that: A conveyor belt is provided below the mixing drum, and a plurality of dividing baffles are provided at intervals on the conveyor belt.

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