A pre-screening coal washing device

Abstract

This utility model discloses a pre-screening coal washing device, relating to the field of coal washing. It includes a frame on which a first box, a second box, and a third box are sequentially fixedly connected. A roller is rotatably connected between the first, second, and third boxes. A rotating assembly is fixedly connected to the frame for rotating the roller. A hopper communicating with the roller is fixedly connected to the frame. A flushing assembly is installed inside the second box for flushing the roller located within it. The beneficial effects are: by pre-separating coal powder from the raw coal using a first screen, subsequent flushing is only performed on the coarse coal, significantly reducing the coal powder content in the wastewater and lowering its turbidity. This not only reduces the workload of the flushing assembly but also simplifies the subsequent wastewater treatment process, significantly reducing the consumption of chemicals and equipment wear costs in wastewater treatment.

Description

Technical Field

[0001] This utility model relates to the field of coal washing technology, specifically to a pre-screening coal washing device. Background Technology

[0002] Coal washing is a crucial step in the deep processing of coal. Its core purpose is to remove ash, sulfur, and impurities from raw coal, improve coal quality and utilization efficiency, and reduce combustion pollution. Currently, most coal washing equipment on the market adopts the traditional process of washing first and then screening. In this mode, coal powder and lumpy coal in the raw coal are mixed into the washing system. A large amount of coal powder is quickly dissolved into the washing water, resulting in a surge in the solids content of the wastewater. This not only significantly increases the consumption of reagents and the equipment load for subsequent wastewater treatment, but also easily causes blockage of washing pipes and nozzles, affecting the continuous operation of the equipment.

[0003] Most mainstream coal washing equipment currently adopts a process mode of rinsing before screening. In this mode, the coal powder in the raw coal is mixed with the coarse coal and enters the rinsing stage. A large amount of coal powder will directly dissolve or be suspended in the rinsing water, resulting in a sharp increase in the turbidity of the sewage. This not only increases the difficulty and cost of subsequent sewage treatment, but also easily causes the pipeline of the rinsing equipment to be blocked. Utility Model Content

[0004] The purpose of this invention is to provide a pre-screening and coal washing device to solve the above problems, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a pre-screening coal washing device, including an equipment frame, on which a first box, a second box and a third box are fixedly connected in sequence. A roller is rotatably connected between the first box, the second box and the third box. A rotating component is fixedly connected to the equipment frame for rotating the roller. A hopper communicating with the roller is fixedly connected to the equipment frame. A flushing component is provided in the second box for flushing the roller located in the second box.

[0007] The roller is inclined, with the end that connects to the hopper being higher.

[0008] Preferably, the roller includes a first mesh cylinder and a second mesh cylinder, the opposite ends of the first mesh cylinder and the second mesh cylinder are fixedly connected by a connecting sleeve, and the other end of the second mesh cylinder is fixedly connected to a discharge cylinder, the discharge cylinder having a plurality of through holes.

[0009] Preferably, a plurality of baffles are fixedly connected inside the second mesh cylinder along the length of the second mesh cylinder, and a plurality of upright plates are fixedly connected to the baffles.

[0010] Preferably, the first mesh cylinder, the second mesh cylinder, and the discharge cylinder are located inside the first box, the second box, and the third box, respectively.

[0011] Preferably, the bottom of the second tank is a conical funnel shape and is provided with a drain outlet, and the bottom of the third tank is connected to the second tank through a water collection pipe.

[0012] Preferably, the bottom of the first box is provided with a funnel, and the top is rotatably connected with a cover plate.

[0013] Preferably, the rinsing assembly includes a plurality of water pipes distributed around the second mesh cylinder, a plurality of nozzles being provided on one side of the water pipes corresponding to the second mesh cylinder, the plurality of water pipes being fixedly connected to the second housing by a fixing bracket, the plurality of water pipes being connected by a connecting pipe, and one end of the connecting pipe passing through the second housing.

[0014] Preferably, the rotating assembly includes a motor, which is fixedly connected to the first housing. A gear is fixedly connected to the output shaft of the motor, and a gear ring is fixedly connected to the surface of the roller, with the gear meshing with the gear ring.

[0015] The beneficial effects are:

[0016] 1. By pre-separating coal powder from the raw coal through the first screen cylinder, subsequent washing is only carried out on the coarse coal, which greatly reduces the coal powder content in the wastewater and reduces the turbidity of the wastewater. This not only reduces the workload of the washing components, but also simplifies the subsequent wastewater treatment process, and significantly reduces the consumption of chemicals and equipment wear and tear costs in wastewater treatment.

[0017] 2. The baffles and vertical plates inside the second mesh cylinder work in conjunction with the rotating drum to continuously tumble and disperse the coal, avoiding dead zones in the washing process. The surrounding washing components form a ring-shaped water flow through multiple nozzles, ensuring full contact between the coal and the water flow, and more thorough removal of impurities. At the same time, the through holes of the discharge cylinder work in conjunction with the third box to achieve secondary drainage, effectively reducing residual moisture in the coal and improving coal quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a front view structural diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the rinsing assembly structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the roller of this utility model.

[0024] The annotations in the attached figures are explained as follows:

[0025] 1. Equipment frame; 2. First housing; 201. Cover plate; 3. Second housing; 4. Third housing; 401. Water collection pipe; 5. Roller; 501. Connecting sleeve; 502. First screen cylinder; 503. Second screen cylinder; 504. Discharge cylinder; 505. Through hole; 506. Baffle; 507. Vertical plate; 6. Rotating assembly; 601. Motor; 602. Gear; 603. Gear ring; 7. Hopper; 8. Washing assembly; 801. Water pipe; 802. Nozzle; 803. Fixing frame; 804. Connecting pipe. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] See Figures 1-5 As shown, this utility model provides a pre-screening coal washing device, including a frame 1. A first box 2, a second box 3, and a third box 4 are sequentially fixedly connected on the frame 1. A roller 5 is rotatably connected between the first box 2, the second box 3, and the third box 4. A rotating component 6 is fixedly connected on the frame 1 for rotating the roller 5. A hopper 7 communicating with the roller 5 is fixedly connected on the frame 1. A flushing component 8 is provided inside the second box 3 for flushing the roller 5 located inside the second box 3. The roller 5 is inclined, and the end communicating with the hopper 7 is higher.

[0028] See Figure 1 and Figure 5The roller 5 includes a first mesh cylinder 502 and a second mesh cylinder 503. The opposite ends of the first mesh cylinder 502 and the second mesh cylinder 503 are fixedly connected by a connecting sleeve 501. The other end of the second mesh cylinder 503 is fixedly connected to a discharge cylinder 504, which has several through holes 505. The first mesh cylinder 502, the second mesh cylinder 503, and the discharge cylinder 504 are located in the first box 2, the second box 3, and the third box 4, respectively. The bottom of the second box 3 is a conical funnel shape and is provided with a drain outlet. The bottom of the third box 4 is connected to the second box 3 through a water collection pipe 401. The bottom of the first box 2 is provided with a funnel, and the top is rotatably connected to a cover plate 201.

[0029] In this embodiment, the segmented design of the drum 5—the first screen cylinder, the second screen cylinder, the discharge cylinder, and the corresponding housing—functionally matches each other to achieve graded processing of coal. The first screen cylinder 502 is located inside the first housing 2, and its mesh structure provides a carrier for pre-screening. When the drum rotates, smaller coal particles pass through the mesh and fall into the first housing 2. The funnel structure at the bottom of the housing facilitates the collection of coal particles, and the top cover 201 can be opened as needed for convenient equipment maintenance and coal particle cleaning. The second screen cylinder 503 is located inside the second housing 3, receiving coarse coal from the first screen cylinder and working with the washing components to complete the cleaning. The conical funnel-shaped bottom and drain of the second housing 3 utilize gravity to quickly collect and discharge the wastewater generated during washing, preventing wastewater accumulation from affecting the washing effect. After the discharge cylinder 504 enters the third chamber 4, the through holes 505 on its surface can drain the residual moisture carried by the coal. The water falling into the third chamber 4 flows back to the second chamber 3 through the water collection pipe 401, realizing centralized sewage treatment and completing the secondary drainage of the coal, thus improving the dewatering effect. The connecting sleeve 501 ensures that the connection of each section of the drum is stable and guarantees the synchronization of the overall rotation.

[0030] See Figure 5 The second mesh cylinder 503 has several baffles 506 fixedly connected inside, which are arranged along the length of the second mesh cylinder 503. Several upright plates 507 are fixedly connected on the baffles 506.

[0031] In this embodiment, the baffle 506 and the vertical plate 507 inside the second mesh cylinder 503 together constitute a coal tumbling reinforcement structure. Their core function is to disrupt the stable sliding state of the coal within the drum, improving the uniformity of rinsing. When the drum rotates, the baffle 506 rotates synchronously with it, generating an upward lifting force on the coal, carrying it to a certain height before allowing it to fall freely, thus achieving coal tumbling. The vertical plate 507 further divides the coal accumulation space, preventing large pieces of coal from agglomerating and dispersing them. This design ensures that each piece of coal can fully contact the water flow sprayed from the rinsing components, effectively removing impurities adhering to the coal surface. This solves the problem of incomplete rinsing caused by simply relying on the tilting and sliding of the drum, significantly improving the cleaning effect.

[0032] See Figure 4 The rinsing assembly 8 includes several water pipes 801 distributed around the second mesh cylinder 503. Several nozzles 802 are provided on one side of the water pipes 801 corresponding to the second mesh cylinder 503. The several water pipes 801 are fixedly connected to the second housing 3 by a fixing bracket 803. The several water pipes 801 are connected by a connecting pipe 804, and one end of the connecting pipe 804 passes through the second housing 3.

[0033] In this embodiment, the flushing assembly 8 achieves efficient flushing through a "centralized water supply - multi-directional spraying" design. The connecting pipe 804 serves as the main water inlet, connecting to an external water source to distribute clean water to each water pipe 801. The fixing bracket 803 ensures the water pipes 801 are stably distributed around the second mesh cylinder 503, forming a ring-shaped flushing area and avoiding blind spots. Multiple nozzles 802 on the water pipes 801 convert the water flow into high-pressure water jets or mists, directly acting on the surface of the rotating and tumbling coal, using the impact force of the water flow to remove dust and impurities from the coal. The combined design of multiple water pipes and nozzles improves the flushing coverage and water flow intensity, and combined with the tumbling action of the coal, ensures flushing without dead angles. Simultaneously, the use of high-pressure water reduces total water consumption, balancing flushing effectiveness with water conservation.

[0034] See Figure 1 The rotating component 6 includes a motor 601, which is fixedly connected to the first housing 2. A gear 602 is fixedly connected to the output shaft of the motor 601, and a gear ring 603 is fixedly connected to the surface of the roller 5, with the gear 602 meshing with the gear ring 603.

[0035] In this embodiment, the rotating component 6 provides stable and reliable rotational power to the drum 5 through a gear transmission mechanism. The motor 601, as a power source, is fixed on the first housing 2 to ensure operational stability. Its output shaft drives the gear 602 to rotate. Through the meshing of the gear 602 with the gear ring 603 on the surface of the drum, the torque of the motor is converted into the rotational motion of the drum.

[0036] Working principle:

[0037] The coal to be screened is poured into hopper 7 and falls onto drum 5 under gravity. Drum 5 is rotated by rotating component 6. During the rotation of drum 5, the coal is screened. The screened coal powder passes through drum 5 and enters first chamber 2, where it is collected. The screened coal continues to slide down drum 5 into second chamber 3. The washing component 8 washes the coal passing through second chamber 3. During the washing process, drum 5 continues to rotate, causing the coal to tumble inside drum 5, which improves the washing effect. Wastewater flows out from the bottom of second chamber 3. The water accumulated in the washed coal is discharged into third chamber 4 through through hole 505, achieving secondary drainage. Finally, the washed coal falls out of drum 5. By screening before washing, the washing difficulty is reduced, the washing effect is improved, and the turbidity of the wastewater is reduced, facilitating subsequent wastewater treatment.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pre-screening coal washing plant characterized in that: The equipment includes a frame (1), on which a first box (2), a second box (3) and a third box (4) are fixedly connected in sequence. A roller (5) is rotatably connected between the first box (2), the second box (3) and the third box (4). A rotating component (6) is fixedly connected to the frame (1) for rotating the roller (5). A hopper (7) communicating with the roller (5) is fixedly connected to the frame (1). A rinsing component (8) is provided inside the second box (3) for rinsing the roller (5) located inside the second box (3). The roller (5) is inclined, and the end that is connected to the hopper (7) is higher; The rinsing assembly (8) includes several water pipes (801) distributed around the second mesh cylinder (503). Several nozzles (802) are provided on one side of the water pipes (801) corresponding to the second mesh cylinder (503). Several water pipes (801) are fixedly connected to the second housing (3) by a fixing bracket (803). Several water pipes (801) are connected by a connecting pipe (804), and one end of the connecting pipe (804) passes through the second housing (3).

2. A pre-screening coal washing device according to claim 1, characterized in that: The roller (5) includes a first mesh cylinder (502) and a second mesh cylinder (503). The opposite ends of the first mesh cylinder (502) and the second mesh cylinder (503) are fixedly connected by a connecting sleeve (501). The other end of the second mesh cylinder (503) is fixedly connected to a discharge cylinder (504). The discharge cylinder (504) has several through holes (505).

3. A pre-screening coal washer according to claim 2, characterised in that: The second mesh cylinder (503) is fixedly connected with a number of baffles (506) arranged along the length direction of the second mesh cylinder (503), and a number of upright plates (507) are fixedly connected on the baffles (506).

4. A pre-screening coal washer according to claim 3, characterised in that: The first mesh cylinder (502), the second mesh cylinder (503), and the discharge cylinder (504) are located in the first box (2), the second box (3), and the third box (4), respectively.

5. A pre-screening coal washer according to claim 4 wherein: The bottom of the second box (3) is a cone-shaped funnel and is provided with a drain outlet. The bottom of the third box (4) is connected to the second box (3) through a water collection pipe (401).

6. The pre-screening coal washing device according to claim 4, characterized in that: The first box (2) has a funnel at the bottom and a cover plate (201) rotatably connected to the top.

7. The pre-screening coal washing device according to claim 1, characterized in that: The rotating assembly (6) includes a motor (601), which is fixedly connected to the first housing (2). A gear (602) is fixedly connected to the output shaft of the motor (601), and a gear ring (603) is fixedly connected to the surface of the roller (5), and the gear (602) meshes with the gear ring (603).

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