A water removal device for coal mine gangue washing

Abstract

This utility model relates to the field of dewatering technology for coal mine paste filling aggregates, specifically to a dewatering device for coal mine washing gangue. It includes a frame with a fixed protective cover, and several exhaust fans fixedly mounted on the top of the protective cover. A drum screen is installed inside the protective cover, connected to the frame via a rotating structure. The protective cover at both ends of the drum screen has an inlet A and an outlet A to facilitate the entry and exit of gangue. An air box with an air outlet is fixedly mounted on the protective cover, positioned along the axial direction of the drum screen, with the air outlet facing the drum screen. The air box is connected to the outlet of a hot air blower via a pipeline. Heated air is delivered to the air box through the pipeline and then blown onto the scattered gangue through the air outlet, accelerating the evaporation of moisture from the gangue surface. The exhaust fans expel the humid air from the protective cover, maintaining internal air circulation and dryness, thus improving dewatering efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water removal technology for coal mine paste filling aggregate, specifically to a water removal device for coal mine washing gangue. Background Technology

[0002] The "Technical Specification for Coal Mine Paste Backfilling Mining" (NB / T 10727-2021) is an energy industry standard issued by the National Energy Administration on November 16, 2021, and implemented on February 16, 2022. This standard is managed by the Science and Technology Development Department of the China Coal Industry Association, and its drafting units include Shandong Kangge Energy Technology Co., Ltd., China University of Mining and Technology, and other institutions. It specifies that the paste material must be prepared by mixing industrial solid waste such as coal gangue and fly ash with cementing materials, requiring the viscosity to be controlled within the range of 2000-6000 mPa·s and the slump to be maintained at 18-24 cm.

[0003] This places high demands on the moisture content of the gangue after coal washing. Currently, gangue is generally dewatered using a rotary drum screen, such as our company's utility model patent application number CN202121050388.8 – an anti-clogging device for a rotary drum screen of coal mine paste filling aggregate. This rotary drum screen is welded together by several parallel rings connected by several spaced connecting rods, with the rings and connecting rods forming screen holes of a uniform size. However, this dewatering method is inefficient and easily affected by weather conditions. Furthermore, during rotation, small fragments of gangue collide with each other and fall into the water tank at the bottom, requiring workers to clean it after a period of use, significantly increasing the workload. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a dewatering device for coal mine gangue washing. The technical problem it addresses is that existing drum screens have low dewatering efficiency, and small fragments that fall off during collisions accumulate in the water tank, requiring workers to clean them, increasing workload. The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A dewatering device for coal mine gangue washing includes: The frame is equipped with a protective cover in a fixed structure, and several exhaust fans are fixedly installed on the top of the protective cover; The drum screen is housed inside a protective cover and connected to the frame via a rotating structure; the protective covers at both ends of the drum screen are equipped with a feed inlet A and a discharge outlet A. An air box with an air outlet is arranged along the axial direction of the drum screen and connected to the protective cover in a fixed structure. The air outlet of the air box faces the drum screen. The hot air blower's air outlet is connected to the air box via a pipe. An inclined plate is fixedly installed inside the protective cover at the bottom of the drum screen. The protective cover on the lower end of the inclined plate has an outlet B and an inlet B. The outlet B is located on the upper surface of the inclined plate, and the inlet B is located at the lower part of the inclined plate. The receiving hopper is fixedly installed on the outer wall of the protective cover on one side of the discharge port B and the inlet port B. The filter screen is fixedly installed in the receiving hopper between the discharge port B and the inlet B.

[0005] Furthermore, the drum screen is symmetrically equipped with support wheels at both ends, and the support wheels are connected to the frame in a rotating manner; A motor is fixedly mounted on the frame, and a drive pulley is mounted on the motor output shaft. The drive pulley is connected to a driven pulley via a belt, and the driven pulley is fixedly connected to a support wheel.

[0006] Furthermore, a discharge hopper is installed on the protective cover at discharge port A.

[0007] Furthermore, the air outlet of the air box faces the lower part of the drum screen.

[0008] Furthermore, a water inlet valve is connected to the side wall of the protective cover at the upper part of the inclined plate.

[0009] Furthermore, a water outlet valve is installed on the lower side wall of the protective cover.

[0010] Furthermore, the hot air blower is a high-pressure electric hot air blower.

[0011] The beneficial effects of this utility model are as follows: a hot air blower is installed to deliver heated air to the air box through a pipeline, and then blown onto the scattered gangue through the air outlet of the air box, which can accelerate the evaporation of moisture on the surface of the gangue. The humid air is discharged from the protective cover by the exhaust fan, maintaining the circulation and dryness of the internal air and improving the water removal efficiency.

[0012] By setting up an inclined plate, small fragments of gangue that have fallen off due to collision, as well as free water, are transported to the receiving hopper. The water passes through a filter screen and enters the protective cover at the bottom of the inclined plate. The fragments are intercepted by the filter screen, making it easier for workers to clean up the broken stones and reducing labor intensity. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention from one angle; Figure 2 This is a three-dimensional structural diagram of the present invention from another angle; Figure 3 This is a schematic diagram of the cross-sectional structure of this utility model; Figure 4 This is a schematic diagram of the lower longitudinal cross-sectional structure of the protective cover of this utility model; In the picture: 1. Frame, 2. Protective cover, 3. Exhaust fan, 4. Discharge hopper, 5. Inlet A, 6. Outlet A, 7. Air box, 8. Hot air blower, 9. Inclined plate, 10. Outlet B, 11. Inlet B, 12. Receiving hopper, 13. Filter screen, 14. Support wheel, 15. Motor, 16. Belt, 17. Inlet valve, 18. Outlet valve. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the utility model will now be described in further detail with reference to the accompanying drawings and the following embodiments, so that the public can better understand the implementation method of this utility model. The specific implementation scheme of this utility model is as follows: A dewatering device for coal mine gangue washing includes a frame 1, a protective cover 2 fixedly mounted on the frame 1, and several exhaust fans 3 fixedly mounted on the top of the protective cover 2. A drum screen is installed inside the protective cover 2, and the drum screen is connected to the frame 1 via a rotating structure. The protective cover 2 at both ends of the drum screen has an inlet A5 and an outlet A6 for convenient gangue loading and unloading. An air box 7 with an air outlet is fixedly mounted on the protective cover 2, arranged along the axial direction of the drum screen, with the air outlet facing the drum screen. The air box 7 is connected to the outlet of a hot air blower 8 via a pipeline. Heated air is transported to the air box through the pipeline and then blown onto the scattered gangue through the air outlet, accelerating the evaporation of moisture from the gangue surface. The exhaust fans then expel the humid air from the protective cover, maintaining internal air circulation and dryness, thus improving dewatering efficiency.

[0015] It should be noted that, in order to ensure that hot air can be blown out of the air outlet, the side wall of the air outlet gradually narrows from the inside to the outside, which makes it easier for hot air to fill the air box 7 and then be discharged at the air outlet; the protective cover 2 can reduce the loss of internal heat.

[0016] An inclined plate 9 is fixedly installed inside the protective cover 2 at the lower part of the drum screen. The protective cover 2 on the lower end of the inclined plate 9 has a discharge port B10 and a feed port B11. The discharge port B10 is located on the upper end face of the inclined plate 9, and the feed port B11 is located at the lower part of the inclined plate 9. A receiving hopper 12 is fixedly installed on the outer wall of the protective cover 2 on the side of the discharge port B10 and the feed port B11. A filter screen 13 is installed in the receiving hopper 12 between the discharge port B10 and the feed port B11. By setting the inclined plate, small pieces of gangue that have fallen off due to collision and free water are transported to the receiving hopper. The water enters the protective cover 2 at the lower part of the inclined plate 9 through the filter screen, and the pieces are intercepted by the filter screen 13, which makes it convenient for workers to clean up the broken stones and reduces labor intensity.

[0017] It should be noted that the drum screen is symmetrically provided with support wheels 14 at both ends. The support wheels 14 are connected to the frame 1 by a rotating structure. The frame 1 is fixedly provided with a motor 15. The output shaft of the motor 15 is provided with a drive pulley. The drive pulley is connected to a driven pulley through a belt 16. The driven pulley is fixedly connected to a support wheel 14. The output shaft of the motor 15 drives the drive pulley to rotate. The drive pulley drives the driven pulley to rotate through the belt 16. The driven pulley drives the support wheel 14 to rotate, thereby driving the drum screen that is in contact with one side of the support wheel 14 to rotate. It should be noted that the drum screen is also inclined.

[0018] To prevent the gangue coming out of the discharge port A6 from falling into the receiving hopper 12, the protective cover 2 at the discharge port A6 is equipped with a discharge hopper 4.

[0019] It should be noted that a water inlet valve 17 is connected to the side wall of the protective cover 2 at the upper part of the inclined plate 9. After use, the water inlet valve 17 is connected to the tap water pipe to flush down the gravel left on the inclined plate 9. The water stored in the lower part of the protective cover 2 is discharged to the designated location through the water outlet valve 18 provided on the lower side wall.

[0020] Hot air blower 8 is a high-pressure electric hot air blower.

[0021] It should be noted that, based on the above embodiments, this embodiment sets the air outlet of the air box 7 to face the lower part of the drum screen in order to dry the gangue after it has been thrown by the drum screen. The thrown gangue is thinner than the bottom, so the hot air can pass through more easily, carrying away the moisture and improving work efficiency.

[0022] The working principle and process of this utility model are as follows: First, start the motor 15. The output shaft of the motor 15 drives the drive pulley to rotate. The drive pulley drives the driven pulley to rotate through the belt 16. The driven pulley drives a support wheel 14 to rotate, which in turn drives the drum screen that is in contact with the support wheel 14 to rotate.

[0023] The washed gangue is fed into the drum screen through the feed inlet A5. The hot air blower 8 is started, and the hot air is transmitted through the pipeline to the air box and then blown onto the scattered gangue through the air outlet. This can accelerate the evaporation of moisture on the surface of the gangue. The humid air is discharged from the protective cover 2 by the exhaust fan 3. As the drum screen rotates, the gangue collisions and falling stones, as well as free water, fall into the inclined plate 9 and gradually slide down to the receiving hopper 12. The free water passes through the filter screen 13 and enters the protective cover 2 at the bottom of the inclined plate 9 through the feed inlet B11. The broken pieces are intercepted by the filter screen 13, which makes it easier for workers to clean up the broken stones and reduces labor intensity.

[0024] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "front," "rear," "lower left," "upper right," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Although this utility model has been described according to a limited number of embodiments, those skilled in the art should understand from the above description that other embodiments can be conceived within the scope of this utility model described herein.

Claims

1. A dewatering device for coal mine gangue washing, characterized in that, include: The frame (1) is equipped with a protective cover (2) in a fixed structure, and several exhaust fans (3) are fixedly installed on the top of the protective cover (2). The drum screen is set inside the protective cover (2) and connected to the frame (1) in a rotating structure; the protective covers (2) at both ends of the drum screen are provided with a feed inlet A (5) and a discharge outlet A (6). The air box (7) with an air outlet is arranged along the axial direction of the drum screen and connected to the protective cover (2) in a fixed structure manner. The air outlet of the air box (7) faces the drum screen. Hot air blower (8), the air outlet of hot air blower (8) is connected to air box (7) through pipe; Inclined plate (9) is fixedly installed in the protective cover (2) at the bottom of the drum screen. The protective cover (2) on the lower end of the inclined plate (9) is provided with a discharge port B (10) and a feed port B (11). The discharge port B (10) is located on the upper end face of the inclined plate (9), and the feed port B (11) is located at the lower part of the inclined plate (9). The receiving hopper (12) is fixedly installed on the outer wall of the protective cover (2) on one side of the discharge port B (10) and the inlet port B (11); The filter screen (13) is fixedly installed in the receiving hopper (12) between the discharge port B (10) and the inlet port B (11).

2. The dewatering device for coal mine washing gangue according to claim 1, characterized in that: The drum screen is symmetrically provided with support wheels (14) at both ends, and the support wheels (14) are connected to the frame (1) in a rotating structure. A motor (15) is fixedly installed on the frame (1). The output shaft of the motor (15) is equipped with a drive pulley. The drive pulley is connected to a driven pulley via a belt (16). The driven pulley is fixedly connected to a support wheel (14).

3. The dewatering device for coal mine washing gangue according to claim 1, characterized in that: A discharge hopper (4) is installed on the protective cover (2) at the discharge port A (6).

4. A dewatering device for coal mine washing gangue according to claim 1, characterized in that: The protective cover (2) at the upper part of the inclined plate (9) is connected to the side wall of the water inlet valve (17).

5. A dewatering device for coal mine washing gangue according to claim 1, characterized in that: A water outlet valve (18) is provided on the lower side wall of the protective cover (2).

6. A dewatering device for coal mine washing gangue according to claim 1, characterized in that: The hot air blower (8) is a high-pressure electric hot air blower.

7. A dewatering device for coal mine washing gangue according to claim 1, characterized in that: The air outlet of the air box (7) faces the lower part of the drum screen.

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