A coal mine exploitation coal washing device

Abstract

The utility model discloses a coal mine exploitation coal washing device belongs to coal mine exploitation coal washing technical field, include: the casing, two mounting brackets are fixedly connected on the casing, two the mounting bracket all rotatoryly connected with first rotation axis, the end portion fixedly connected with the stirring wheel of first rotation axis, the outside installation of mounting bracket is used for driving drive mechanism of first rotation axis, the utility model discloses through setting up multiple fan blade, can with silt water flow or interval accept stirring force effect further intensify the turbulence degree of middle layer silt water, expand gas -liquid interface contact area, cooperate external air source and pass into the air disc through the air inlet pipe, and the airflow is spouted and impacts the annular baffle from multiple air nozzles, make the airflow spread to all around and form a large number of small uniform bubbles, realize in the bottom and intermediate layer can cause greater gas -liquid interface's sufficient breakage and dispersion, greatly promote bubble generation efficiency and uniformity, provide sufficient carrier for coal particle adsorption, and then improve the flotation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of coal mining and coal washing technology, specifically a coal washing device for coal mining. Background Technology

[0002] Mining coal washing flotation machine is the core equipment in coal washing and processing, which separates coal from gangue for fine-grained coal slime. Its principle is based on the difference in surface physicochemical properties between coal and gangue. It generates a flotation separation process through bubble adsorption, enriching combustible clean coal and discharging gangue with high ash content. Essentially, it uses the difference in surface wettability to achieve solid-liquid separation.

[0003] Existing coal washing flotation machines for mining typically generate bubbles by stirring the liquid at the bottom using agitator blades. This results in low bubble generation efficiency, which in turn affects flotation efficiency. Furthermore, since the stirring is only done at the bottom, it is difficult to effectively introduce a gas source to generate bubbles. Therefore, a coal washing device for coal mining is proposed. Summary of the Invention

[0004] The purpose of this utility model is to provide a coal washing device for coal mining to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coal washing device for coal mining, comprising: a shell, on which two mounting brackets are fixedly connected, each mounting bracket having a first rotating shaft rotatably connected inside, the end of each first rotating shaft being fixedly connected to a stirring wheel, and a driving mechanism for driving the first rotating shaft being mounted on the outside of the mounting brackets; a fixed pipe, fixedly connected to the bottom of the mounting brackets, with an air plate fixedly connected to the outside of the fixed pipe, multiple air nozzles connected to the outside of the air plate, and an annular baffle fixedly connected to the outside of the air plate, with an air inlet pipe connected to the air plate; and a scraping mechanism, mounted on the shell, for scraping out the foam layer on the liquid surface.

[0006] As a further preferred embodiment of this technical solution: the drive mechanism includes a first geared motor, which is mounted on the outside of the mounting bracket, and the first geared motor is connected to the first rotating shaft via a first transmission component.

[0007] As a further preferred embodiment of this technical solution: the scraping mechanism includes a second rotating shaft, which is rotatably connected to the housing. Multiple scraping plates are fixedly connected to the outside of the second rotating shaft. A second reduction motor is installed on the outside of the housing, and the second reduction motor is connected to the second rotating shaft through a second transmission component.

[0008] As a further preferred embodiment of this technical solution: a fixing plate is fixedly connected to the bottom of the fixing tube, and multiple fan blades are fixedly connected to the bottom of the fixing plate.

[0009] As a further preferred embodiment of this technical solution: an overflow box is fixedly connected to the outside of the housing, and a connecting pipe is connected to the outside of the overflow box, and the connecting pipe is connected to the fixed pipe.

[0010] As a further preferred embodiment of this technical solution: the bottom of the housing is connected to a first output tube and a second output tube.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention, by setting multiple fan blades, can further intensify the turbulence of the middle layer of coal slurry water by flowing with the coal slurry water or by indirectly receiving stirring force, thereby expanding the gas-liquid interface contact area. In conjunction with an external air source, after being introduced into the air plate through the air inlet pipe, airflow is ejected from multiple air nozzles and impacts the annular baffle, causing the airflow to diffuse in all directions and form a large number of small and uniform bubbles. This achieves greater breaking and dispersion of the gas-liquid interface in both the bottom and middle layers, significantly improving the bubble generation efficiency and uniformity, providing sufficient carrier for coal particle adsorption, and thus improving flotation efficiency. Attached Figure Description

[0013] Figure 1 This is a first structural schematic diagram of a coal washing device for coal mining according to the present invention;

[0014] Figure 2 This is a schematic diagram of the second structure of a coal washing device for coal mining according to the present invention;

[0015] Figure 3 This is a schematic diagram of the fan blade structure in a coal washing device for coal mining according to this utility model.

[0016] In the diagram: 1. Housing; 2. Mounting bracket; 3. First rotating shaft; 4. First transmission component; 5. First geared motor; 6. Second geared motor; 7. Second rotating shaft; 8. Second transmission component; 9. Scraper; 10. Fixed pipe; 11. Fixed plate; 12. First output pipe; 13. Second output pipe; 14. Air disc; 15. Air nozzle; 16. Annular baffle; 17. Air inlet pipe; 18. Overflow box; 19. Connecting pipe; 20. Fan blade; 21. Stirring wheel. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Example 1

[0019] Please see Figures 1-3 This utility model provides a technical solution: a coal washing device for coal mining, comprising: a shell 1, a fixed pipe 10, an air plate 14, and a scraping mechanism.

[0020] In this embodiment, specifically: two mounting brackets 2 are fixedly connected to the housing 1, and a first rotating shaft 3 is rotatably connected inside each mounting bracket 2. A stirring wheel 21 is fixedly connected to the end of the first rotating shaft 3. A drive mechanism for driving the first rotating shaft 3 is installed on the outside of the mounting bracket 2; a fixed pipe 10 is fixedly connected to the bottom of the mounting bracket 2, and an air plate 14 is fixedly connected to the outside of the fixed pipe 10. Multiple air nozzles 15 are installed on the outside of the air plate 14, and an annular baffle 16 is also fixedly connected to the outside of the air plate 14. An air inlet pipe 17 is connected to the air plate 14; a scraping mechanism is installed on the housing 1 for scraping the foam layer on the liquid surface.

[0021] The drive mechanism includes a first geared motor 5, which is mounted on the outside of the mounting bracket 2. The first geared motor 5 is connected to the first rotating shaft 3 through a first transmission component 4.

[0022] The scraping mechanism includes a second rotating shaft 7, which is rotatably connected to the housing 1. Multiple scraping plates 9 are fixedly connected to the outside of the second rotating shaft 7. A second reduction motor 6 is installed on the outside of the housing 1. The second reduction motor 6 is connected to the second rotating shaft 7 through a second transmission component 8.

[0023] In this embodiment, specifically: the first transmission component 4 and the second transmission component 8 are both composed of transmission belts and transmission wheels, and the transmission wheels are installed on the corresponding rotating shafts and the corresponding motors.

[0024] In this embodiment, specifically: after the first reduction motor 5 outside the mounting frame starts, it drives the first rotating shaft 3 to rotate through the first transmission component 4. The stirring wheel 21 at the end of the rotating shaft rotates accordingly, stirring the coal slurry water at the bottom of the shell 1, initially breaking the stable state of the liquid layer. Multiple fan blades 20 further intensify the turbulence of the middle layer of coal slurry water as the coal slurry water flows or is indirectly subjected to stirring force, expanding the gas-liquid interface contact area and improving the collision efficiency of subsequent bubbles and coal particles. The second reduction motor 6 outside the shell 1 drives the second rotating shaft 7 to rotate through the second transmission component 8. Multiple scraper plates 9 on the second rotating shaft 7 rotate synchronously, scraping the foam layer on the liquid surface from the coal slurry water.

[0025] The bottom of the fixed tube 10 is fixedly connected to a fixed plate 11, and the bottom of the fixed plate 11 is fixedly connected to multiple fan blades 20.

[0026] The outer shell 1 is fixedly connected to an overflow box 18, and the outer shell 18 is connected to a connecting pipe 19, which is connected to the fixed pipe 10.

[0027] In this embodiment, specifically: the liquid containing a small amount of fine coal slurry collected in the overflow box 18 flows back to the fixed pipe 10 through the connecting pipe 19 and re-enters the shell 1 to participate in the coal washing process, thereby reducing the loss of useful coal particles;

[0028] The bottom of the housing 1 is connected to the first output tube 12 and the second output tube 13.

[0029] In this embodiment, specifically: after coal washing is completed, the bottom coal slurry water rich in gangue is discharged through the second output pipe 13 at the bottom of the shell 1, and the remaining intermediate layer liquid or secondary separation product is discharged through the first output pipe 12, thereby realizing the classified treatment of clean coal, gangue and coal washing water.

[0030] Example 2

[0031] Please see Figure 1 and Figure 2 An external air source is introduced into the air plate 14 through the air inlet pipe 17. After the gas is evenly distributed inside the air plate 14, it is sprayed outward through multiple air nozzles 15 connected to its outside. The airflow sprayed out by the air nozzles 15 directly impacts the annular baffle 16 outside the air plate 14, avoiding the problem of excessively large bubbles caused by concentrated airflow rising.

[0032] In this embodiment, specifically: after the airflow impacts the annular baffle 16, it spreads outwards to form a large number of small, uniform bubbles, which are evenly distributed in the coal slurry water in the middle layer of the shell 1, providing a carrier for coal particle adsorption. The turbulence caused by the stirring wheel 21 and multiple fan blades 20 forms more bubbles, thus realizing the formation of foam.

[0033] In this embodiment, specifically: the second reduction motor 6 outside the housing 1 drives the second rotating shaft 7 to rotate through the second transmission component 8, and the multiple scraping plates 9 on the second rotating shaft 7 rotate synchronously to scrape the foam layer from the coal slurry water.

[0034] Working principle: After the first reduction motor 5 outside the mounting frame 2 starts, it drives the first rotating shaft 3 to rotate through the first transmission component 4. The stirring wheel 21 at the end of the rotating shaft rotates accordingly, stirring the coal slurry water at the bottom of the shell 1, initially breaking the stable state of the liquid layer. Multiple fan blades 20 further intensify the turbulence of the middle layer coal slurry water by flowing with the coal slurry water or by being indirectly stirred, expanding the gas-liquid interface contact area and improving the collision efficiency of subsequent bubbles and coal particles.

[0035] An external air source is introduced into the air plate 14 through the air inlet pipe 17. After the gas is evenly distributed inside the air plate 14, it is ejected outward through multiple air nozzles 15 connected to its outside. The airflow ejected from the air nozzles 15 directly impacts the annular baffle 16 outside the air plate 14, avoiding the problem of excessively large bubbles caused by concentrated airflow. After the airflow hits the annular baffle 16, it spreads in all directions, forming a large number of small, uniform bubbles that are evenly distributed in the coal slurry water in the middle layer of the shell 1, providing a carrier for coal particle adsorption.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal washing device for coal mining, characterized in that, include: The housing (1) has two mounting brackets (2) fixedly connected to it. Each of the two mounting brackets (2) has a first rotating shaft (3) rotatably connected inside. The end of the first rotating shaft (3) is fixedly connected to a stirring wheel (21). A driving mechanism for driving the first rotating shaft (3) is installed on the outside of the mounting bracket (2). A fixed tube (10) is fixedly connected to the bottom of the mounting bracket (2). An air plate (14) is fixedly connected to the outside of the fixed tube (10). Multiple air nozzles (15) are connected to the outside of the air plate (14). An annular baffle (16) is also fixedly connected to the outside of the air plate (14). An air inlet pipe (17) is connected to the air plate (14). A scraping mechanism, which is mounted on the housing (1), is used to scrape the foam layer from the liquid surface.

2. A coal washing device for coal mining according to claim 1, characterized in that: The drive mechanism includes a first geared motor (5), which is mounted on the outside of the mounting bracket (2). The first geared motor (5) is connected to the first rotating shaft (3) via a first transmission member (4).

3. A coal washing device for coal mining according to claim 1, characterized in that: The scraping mechanism includes a second rotating shaft (7), which is rotatably connected to the housing (1). Multiple scraping plates (9) are fixedly connected to the outside of the second rotating shaft (7). A second geared motor (6) is installed on the outside of the housing (1). The second geared motor (6) is connected to the second rotating shaft (7) through a second transmission component (8).

4. A coal washing device for coal mining according to claim 1, characterized in that: The bottom of the fixed tube (10) is fixedly connected to a fixed plate (11), and the bottom of the fixed plate (11) is fixedly connected to multiple fan blades (20).

5. A coal washing device for coal mining according to claim 1, characterized in that: An overflow box (18) is fixedly connected to the outside of the housing (1), and a connecting pipe (19) is connected to the outside of the overflow box (18). The connecting pipe (19) is connected to the fixed pipe (10).

6. A coal washing device for coal mining according to claim 1, characterized in that: The bottom of the housing (1) is connected to a first output tube (12) and a second output tube (13).

Images