Tar residue two-stage crushing and double-helix conveying device and method

Abstract

The invention provides a tar residue two-stage crushing and double-helix conveying device and method.The tar residue two-stage crushing and double-helix conveying device comprises a crusher and a conveyor, the conveyor comprises a conveying groove, and a cover plate is installed on the upper portion of the conveying groove and communicates with a discharging opening of the crusher; a driving assembly is installed on one side of the conveying groove and drives the first spiral shaft and the second spiral shaft to rotate, and the first spiral shaft and the second spiral shaft are rotationally installed in the conveying groove side by side. A first spiral blade and a second spiral blade which are opposite in rotation direction are installed on the first spiral shaft and the second spiral shaft respectively, and the screw pitch of the first spiral blade is two times that of the second spiral blade. According to the invention, the crusher and the conveyor are combined to form a two-stage crushing system, and strong shearing, rubbing and impact crushing are carried out on large tar residues through the synergistic effect of the staggered crushing blades and the double-spiral blades, so that the materials are fully crushed, the mixing uniformity of the tar residues and coal is improved, and the subsequent coal blending and coking effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tar residue processing, and in particular relates to a two-stage crushing and double-helix transmission device and method for tar residue. Background Art

[0002] Tar residue is a viscous, sticky solid waste produced during the coking process. It's considered one of the "three industrial wastes" and is highly polluting. Tar residue contains a certain amount of carbon and organic matter, which can be converted into fuel or chemical raw materials through appropriate processing, achieving resource recycling. The traditional disposal method for tar residue is to use it in coal blending for coking. However, improper storage, transportation, and handling can easily cause serious harm to the environment and human health.

[0003] Due to the high viscosity of tar residue, large pieces of tar residue are difficult to effectively break up after a single crushing operation in a crusher. This prevents them from being fully mixed with coal, severely impacting coal blending and, in turn, the subsequent coking process. When conveying tar residue, traditional conveying equipment (such as single screw conveyors) is prone to adhesion to the inner walls or spiral blades due to the high viscosity of the material, leading to accumulation and even blockage. Blockages are difficult to clean, seriously impacting the normal operation of production equipment. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention aims to propose a two-stage crushing and double-helix transmission device and method for tar residue. The transmission device and method solve the problem that when existing transmission equipment transports tar residue, the material is highly viscous and easily adheres to the inner wall of the equipment or the spiral blades, forming accumulation or even blockage.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows: A two-stage crushing and double-screw transmission device for tar residue includes a crusher and a conveyor. After being crushed by the crusher, the tar residue enters the conveyor. The conveyor includes a conveying trough with a cover installed on the top and connected to the crusher discharge port. A drive assembly is installed on one side of the conveying trough. The drive assembly is used to drive a first screw shaft and a second screw shaft to rotate. The first and second screw shafts rotate in opposite directions and are installed inside the conveying trough to rotate side by side. The first spiral shaft and the second spiral shaft are respectively installed with a first spiral blade and a second spiral blade. The first spiral blade and the second spiral blade are arranged alternately and have opposite rotation directions. The pitch of the first spiral blade is twice the pitch of the second spiral blade, and the diameter of the first spiral blade is larger than the diameter of the second spiral blade.

[0006] Furthermore, the first spiral shaft rotates counterclockwise, the second spiral shaft rotates clockwise, the spiral line of the first spiral blade rotates clockwise, and the spiral line of the second spiral blade rotates counterclockwise.

[0007] Furthermore, the conveying trough is a U-shaped trough with an open top, and a discharge port is provided at the end along the transport direction.

[0008] Furthermore, the drive assembly includes a conveying motor, the output shaft of the conveying motor is connected to the second spiral blade end through a coupling, the second spiral blade end and the first spiral blade end are respectively installed with gear one and gear two, and the gear one and gear two are engaged for transmission.

[0009] Furthermore, the crusher includes a crushing shell, a crushing motor, a crusher shaft, a stirring rod and a crushing blade. The top of the crushing shell is provided with a feed port, and the bottom is provided with at least one discharge port, and the discharge port is connected to the top of the conveying trough; a crushing motor is installed on one side of the crushing shell, and the crushing motor is used to drive the crusher shaft to rotate; a stirring rod is installed vertically on the side wall of the crusher shaft, and a crushing blade is installed on the end of the stirring rod.

[0010] Furthermore, the angle between the axis of the crushing blade and the stirring rod is 45°.

[0011] Furthermore, a plurality of discharge ports are provided at the bottom of the crushing shell, and the plurality of discharge ports are located on the same straight line.

[0012] Furthermore, there are multiple stirring rods, which are staggered along the axial direction of the crusher shaft.

[0013] A two-stage crushing and double-helix transmission method for tar residue comprises the following steps: S1, the tar residue enters the crusher from the crusher feed port, and the crusher is started to perform primary crushing on the tar residue; S2. The tar residue after primary crushing enters the conveyor from the crusher discharge port, and the drive assembly is started to drive the first screw shaft and the second screw shaft to rotate. The first screw shaft and the second screw shaft convey the tar residue in the axial direction and perform secondary crushing on the tar residue; S3. The tar residue after secondary crushing is discharged from the discharge port of the conveyor.

[0014] Compared with the prior art, the tar residue two-stage crushing and double-helix transmission device and method of the present invention have the following advantages: The two-stage crushing and double-helix transmission device and method for tar residue described in the present invention form a two-stage crushing system by combining a crusher with a conveyor. Through the synergistic effect of the staggered crushing blades and double-helix blades, large pieces of tar residue are strongly sheared, kneaded and impact-crushed, ensuring that the material is fully crushed, improving the mixing uniformity of tar residue and coal, and enhancing the subsequent coal blending and coking effect.

[0015] The conveyor's enclosed structure effectively prevents the escape of tar residue and harmful gases, minimizing environmental pollution. The conveyor can be installed horizontally, tilted, or vertically at any location along the conveyor line for loading and unloading, adapting to varying operating conditions and enhancing production flexibility. It also features unequally spaced double helical blades. The first helical blade pushes the material toward the axis, while the second helical blade removes any remaining material from the axis, creating a strong shear and convection mixing effect that effectively prevents material accumulation at the axis. The intermeshing, counter-rotating double helical blades continuously knead and compress the tar residue during conveyance, preventing it from adhering to the inner walls of the equipment, ensuring smooth conveying and minimizing the risk of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of the conveyor structure provided by an embodiment of the present invention; Figure 3 This is a schematic diagram of the crusher structure provided by an embodiment of the present invention.

[0017] Description of reference numerals: 1. Crusher; 11. Crushing shell; 12. Crushing motor; 13. Crusher shaft; 14. Agitator rod; 15. Crushing blade; 2. Conveyor; 21. Conveying trough; 22. Cover plate; 23. Drive assembly; 231. Conveying motor; 24. First spiral shaft; 25. Second spiral shaft; 26. First spiral blade; 27. Second spiral blade. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0022] like Figures 1 to 3 As shown, a tar residue two-stage crushing and double-helix transmission device includes a crusher 1 and a conveyor 2. After being crushed by the crusher 1, the tar residue enters the conveyor 2. The conveyor 2 includes a conveying trough 21, a cover plate 22, a drive assembly 23, a first spiral shaft 24, a second spiral shaft 25, a first spiral blade 26 and a second spiral blade 27. A cover plate 22 is installed on the upper portion of the conveying trough 21 and is in communication with the discharge port of the crusher 1; a drive assembly 23 is installed on one side of the conveying trough 21, and the drive assembly 23 is used to drive the first screw shaft 24 and the second screw shaft 25 to rotate. The first screw shaft 24 and the second screw shaft 25 rotate in opposite directions and are installed side by side inside the conveying trough 21 for rotation; A first spiral blade 26 and a second spiral blade 27 are respectively installed on the first spiral shaft 24 and the second spiral shaft 25. The first spiral blade 26 and the second spiral blade 27 are staggered and rotate in opposite directions. The pitch of the first spiral blade 26 is twice the pitch of the second spiral blade 27, and the diameter of the first spiral blade 26 is larger than the diameter of the second spiral blade 27.

[0023] In a preferred embodiment of the present invention, the conveying trough 21 is a U-shaped trough with an open top, a discharge port is provided at the end along the transport direction, the inner wall is smooth, and the bottom is rounded.

[0024] Specifically, the top of the trough 21 is detachably connected to the cover plate 22, facilitating regular cleaning of residual material within the trough. The mirror-polished interior and rounded bottom significantly reduce cleaning effort. Furthermore, the cover plate 22 and trough 21 form a closed cavity, preventing environmental pollution caused by spillage of viscous material during tar slag transport and minimizing odor, thus complying with environmental protection requirements.

[0025] The cover plate 22 can be set with feed ports of different shapes and sizes according to actual production needs, which is convenient for connection with other equipment. The conveying trough 21 and the cover plate 22 are all made of stainless steel and can support various cleaning methods such as high-pressure water gun cleaning, making it convenient to regularly clean the residue inside the equipment.

[0026] In a preferred embodiment of the present invention, the drive assembly 23 includes a conveying motor 231, gear one and gear two. The output shaft of the conveying motor 231 is connected to the end of the second spiral blade 27 through a coupling. The end of the second spiral blade 27 and the end of the first spiral blade 26 are respectively installed with gear one and gear two, and the gear one and gear two are engaged for transmission.

[0027] Specifically, drive assembly 23, through the meshing of gears 1 and 2, ensures that first and second spiral shafts 24 and 25 rotate synchronously in opposite directions, forming a stable mechanical motion trajectory. This counter-rotation creates opposing interference forces between first and second spiral blades 26 and 27, creating a strong shear field at the intersection. This forces the material to reciprocate between the two shafts, causing it to shear and rub, overcoming the viscous resistance of the tar residue.

[0028] In this embodiment, the first spiral shaft 24 rotates counterclockwise, the second spiral shaft 25 rotates clockwise, the first spiral blade 26 rotates right, and the second spiral blade 27 rotates left. The first spiral shaft 24 and the second spiral shaft 25 are made of seamless steel pipes.

[0029] The first and second spiral blades 26, 27 are designed with unequal pitches. The larger diameter of the first spiral blade 26 enhances its ability to grab large pieces of material. Simultaneously, with its greater axial thrust, it rapidly pushes the tar residue from the edge of the conveyor trough 21 toward the center of the first and second spiral shafts 24, 25, concentrating the crushing force. The smaller pitch of the second spiral blade 27 generates a higher extrusion force and penetrates the gaps between adjacent blades of the first spiral blade 26, achieving full-range mixing and crushing of the material, clearing material accumulation in the central axis and preventing material stagnation and the formation of a "dead zone."

[0030] In a preferred embodiment of the present invention, the crusher 1 includes a crushing shell 11, a crushing motor 12, a crusher shaft 13, a stirring rod 14 and a crushing blade 15. The crushing shell 11 is provided with a feed port at the top and at least one discharge port at the bottom, and the discharge port is connected to the top of the conveying trough 21; a crushing motor 12 is installed on one side of the crushing shell 11, and the crushing motor 12 is used to drive the crusher shaft 13 to rotate. The side wall of the crusher shaft 13 is vertically installed with a stirring rod 14, and a crushing blade 15 is installed at the end of the stirring rod 14, and the angle between the axis of the crushing blade 15 and the stirring rod 14 is 45°.

[0031] Specifically, the crushing motor 12 drives the crusher shaft 13 through a coupling at high speed (the speed can be adjusted according to the material viscosity), providing rotational energy for the crushing blades. The crusher shaft 13 is made of high-strength seamless steel pipe to withstand the centrifugal and shear forces of the rotating crushing blades, ensuring structural stability.

[0032] The crushing blade 15 cuts and impacts the large tar slag. The 45° angle setting reduces the retention of material at the root of the blade, and initially crushes the slag into smaller particle sizes, which evenly fall into the screw conveyor trough 21 through the bottom discharge port 4.

[0033] In a preferred embodiment of the present invention, the bottom of the crushing shell 11 is provided with a plurality of discharge ports, and the plurality of discharge ports are located on the same straight line, and the cover plate 22 is correspondingly provided with a plurality of feed ports; Specifically, the multiple discharge ports are located in the same straight line and aligned with the feed port on the cover plate 22 , thereby improving feed uniformity and avoiding local accumulation caused by single-point feed.

[0034] In a preferred embodiment of the present invention, a plurality of stirring rods 14 are provided and are staggered along the axial direction of the crusher shaft 13 .

[0035] Specifically, the staggered arrangement of the stirring rods 14 enables the blades to generate an axial pushing force when rotating, thereby preventing the material from being retained near a certain layer of blades for a long time and reducing the risk of "blade entanglement" caused by viscosity.

[0036] A two-stage crushing and double-helix transmission method for tar residue comprises the following steps: S1, the tar residue enters the crusher 1 from the feed port of the crusher 1, and the crusher 1 is started to perform primary crushing on the tar residue; S2: The tar residue after primary crushing enters the conveyor 2 from the discharge port of the crusher 1. The drive assembly 23 is started to drive the first screw shaft 24 and the second screw shaft 25 to rotate. The first screw shaft 24 and the second screw shaft 25 transport the tar residue in the axial direction and perform secondary crushing on the tar residue. S3. The tar residue after secondary crushing is discharged from the discharge port of conveyor 2.

[0037] In S2, after the first level of crushing, some larger pieces of tar residue remain. The first spiral blade 26 pushes the remaining large pieces of tar residue toward the spiral axis, while the second spiral blade 27 helps remove the residual material at the axis, effectively preventing material accumulation at the axis. The two-way thrust forms a strong shear and convection mixing effect in the axis intersection area. The material continuously rubs against each other between the first spiral blade 26 and the second spiral blade 27, thereby overcoming the resistance caused by the sticky tar residue. The first spiral shaft 24 and the second spiral shaft 25 have different directions. The first spiral blade 26 and the second spiral blade 27 rely on alternating rotation and conveying back and forth to push the material toward the discharge port of the conveying trough 21, which can avoid material blockage caused by material accumulation.

[0038] The first spiral blade 26 and the second spiral blade 27 are arranged in opposite directions and crosswise to ensure stable conveying performance of tar residue, avoid material getting stuck in the spiral body, achieve stable and efficient conveying, and achieve efficient cleaning effect, so that it has a wide range of applications in conveying viscous materials.

[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 in the scope of protection of the present invention.

Claims

1. A two-stage crushing and double-screw conveying device for tar residue, comprising a crusher and a conveyor. The tar residue is crushed by the crusher and then enters the conveyor. The device is characterized by: The conveyor includes a conveying trough, a cover plate is installed on the upper part of the conveying trough and is connected to the crusher discharge port; a drive assembly is installed on one side of the conveying trough, and the drive assembly is used to drive the first screw shaft and the second screw shaft to rotate, and the first screw shaft and the second screw shaft rotate in opposite directions, and the first screw shaft and the second screw shaft are installed inside the conveying trough to rotate side by side; The first spiral shaft and the second spiral shaft are respectively installed with a first spiral blade and a second spiral blade. The first spiral blade and the second spiral blade are arranged alternately and have opposite rotation directions. The pitch of the first spiral blade is twice the pitch of the second spiral blade, and the diameter of the first spiral blade is larger than the diameter of the second spiral blade.

2. The tar residue two-stage crushing and double-helix transmission device according to claim 1 is characterized in that: The first spiral shaft rotates counterclockwise, the second spiral shaft rotates clockwise, the spiral line of the first spiral blade rotates clockwise, and the spiral line of the second spiral blade rotates counterclockwise.

3. The tar residue two-stage crushing and double-helix transmission device according to claim 1 is characterized in that: The conveying trough is a U-shaped trough with an open top, and a discharge port is provided at the end along the conveying direction.

4. The tar residue two-stage crushing and double-helix transmission device according to claim 1 is characterized in that: The driving assembly includes a conveying motor, the output shaft of the conveying motor is connected to the second spiral blade end through a coupling, the second spiral blade end and the first spiral blade end are respectively installed with gear one and gear two, and the gear one and gear two are engaged for transmission.

5. The tar residue two-stage crushing and double-helix transmission device according to claim 1 is characterized in that: The crusher includes a crushing shell, a crushing motor, a crusher shaft, a stirring rod and a crushing blade. The top of the crushing shell is provided with a feed port, and the bottom is provided with at least one discharge port, and the discharge port is connected to the top of the conveying trough; a crushing motor is installed on one side of the crushing shell, and the crushing motor is used to drive the crusher shaft to rotate; a stirring rod is installed vertically on the side wall of the crusher shaft, and a crushing blade is installed on the end of the stirring rod.

6. The tar residue two-stage crushing and double-helix transmission device according to claim 5, characterized in that: The angle between the axis of the crushing blade and the stirring rod is 45°.

7. The tar residue two-stage crushing and double-helix transmission device according to claim 5, characterized in that: The bottom of the crushing shell is provided with a plurality of discharge ports, and the plurality of discharge ports are located on the same straight line.

8. The tar residue two-stage crushing and double-helix transmission device according to claim 5, characterized in that: There are multiple stirring rods, which are staggered along the axial direction of the crusher shaft.

9. A two-stage crushing and double-helix transmission method for tar residue, characterized in that: The tar residue two-stage crushing and double-helix transmission device according to any one of claims 1 to 8 comprises the following steps: S1, the tar residue enters the crusher from the crusher feed port, and the crusher is started to perform primary crushing on the tar residue; S2. The tar residue after primary crushing enters the conveyor from the crusher discharge port, and the drive assembly is started to drive the first screw shaft and the second screw shaft to rotate. The first screw shaft and the second screw shaft convey the tar residue in the axial direction and perform secondary crushing on the tar residue; S3. The tar residue after secondary crushing is discharged from the discharge port of the conveyor.

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