Mine coal slurry cleaning device and use method thereof

Abstract

The present invention relates to a mine coal slurry cleaning device and a method for using the same. To fill the gap in the prior art, the mine coal slurry cleaning device includes a pneumatic coal slurry agitator, a vacuum storage tank, a jet pump, a centrifugal spiral solid-liquid separator and a screw conveyor. The pneumatic coal slurry agitator includes a pneumatic motor, a stirring claw and a slurry suction pipe. The present invention can stir the coal slurry into coal slurry and then suck it into the vacuum storage tank. Then, the exhaust valve and the suction valve are closed, and the discharge valve is opened at the same time. The vacuum storage tank is inflated by the jet pump - at this time, only the local jet pump is used as a pipeline, and the coal slurry is pressed into the centrifugal spiral solid-liquid separator by compressed air. The centrifugal spiral solid-liquid separator separates the coal slurry blocks and water, and the coal slurry blocks are transferred to the belt conveyor by the screw conveyor for recycling. The mine coal slurry cleaning device of the present invention is labor-saving and efficient, and its method of use is simple and easy to implement. It is suitable for cleaning drainage ditches, mining area water tanks and underground central water tanks in coal mines.

Description

Technical Field

[0001] The invention relates to a mine coal slurry cleaning device and a use method thereof. Background Art

[0002] The coal slurry and water produced in the coal mining, washing, storage and other links bring many instabilities to the mine production due to their easy precipitation and solidification and extremely poor fluidity, affecting the process cycle of coal mining and even endangering the safe production of coal mines in serious cases.

[0003] The coal slurry and water in coal mines are mainly concentrated in three places that need to be treated regularly, namely the drainage ditch, the mining area water tank, and the central water tank at the bottom of the well.

[0004] For a long time, people have concentrated the treatment of underground coal slurry water in the water tank in the mining area and the central water tank at the bottom of the well. Due to the long transportation distance of the drainage ditch and the fact that the coal slurry water flows and settles at the same time, its dynamic characteristics are too strong, resulting in the lack of cleaning equipment. Therefore, it is very difficult to treat and people are forced to use primitive manual cleaning methods. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to fill the above-mentioned gap in the prior art and provide a mine coal slurry cleaning device and a method of using the same.

[0006] In order to solve the above technical problems, the present mine coal slurry cleaning device includes a pneumatic coal slurry agitator, a vacuum storage tank, a jet pump, a centrifugal spiral solid-liquid separator and a screw conveyor. The pneumatic coal slurry agitator includes a pneumatic motor, a stirring claw and a slurry suction pipe. The stirring claw is fixed to the lower end of the output shaft of the pneumatic motor. A protective sleeve is arranged outside the output shaft. A bearing is arranged between the protective sleeve and the output shaft. The slurry suction pipe and the protective sleeve are fixed side by side. The lower port of the slurry suction pipe extends to the lower part of the output shaft. An electric agitator is arranged in the vacuum storage tank. A suction pipe and a vent pipe are respectively arranged on the side wall or the top of the vacuum storage tank. The vent pipe is communicated with the suction port of the jet pump. A suction valve is arranged on the suction pipe, and the suction valve is connected to the pneumatic motor through a corrugated hose. The upper port of the slurry suction pipe on the coal slurry agitator is connected, the inlet of the jet pump is connected to the high-pressure gas source, a discharge pipe is provided at the bottom of the vacuum storage tank, a discharge valve is provided on the discharge pipe, and the centrifugal spiral solid-liquid separator is connected to the feed pipe through a pipeline, the liquid phase outlet of the centrifugal spiral solid-liquid separator is connected to the underground drainage ditch, the solid phase outlet of the centrifugal spiral solid-liquid separator is connected to the inlet of the screw conveyor, the outlet of the screw conveyor is directly opposite to the upper belt of the underground belt conveyor, the suction valve and the discharge valve are controlled in linkage, and the switch states are opposite, the outlet of the jet pump is connected to an exhaust pipe, an exhaust valve is provided on the exhaust pipe, and a liquid level observation window is also provided on the vacuum storage tank. Note: The rotation diameter of the outer side of the stirring claw should be smaller than the width of the drainage ditch to be cleaned.

[0007] The screw conveyor refers to the screw conveyor disclosed in the Chinese utility model patent No. 201120489797.8. The centrifugal screw solid-liquid separator refers to the horizontal screw centrifuge for solid-liquid separation disclosed in the Chinese utility model patent No. 201921364039.6.

[0008] The present invention can stir the coal slurry deposited at the bottom of the drainage ditch into coal slurry and then suck it into the vacuum storage tank. Then, the exhaust valve and the suction valve are closed, and the discharge valve is opened at the same time. The vacuum storage tank is inflated by the jet pump (at this time, only a part of the jet pump is used as a pipeline). The coal slurry is pressed into the centrifugal spiral solid-liquid separator by compressed air, and the centrifugal spiral solid-liquid separator separates the coal slurry blocks and water, and the coal slurry blocks are transferred to the belt conveyor by the screw conveyor for recycling.

[0009] Such a design greatly reduces the labor intensity of cleaning personnel and improves efficiency.

[0010] As an optimization, the suction valve and the discharge valve are linked by a connecting rod, an operating handle is provided on the connecting rod, and a muffler is provided on the exhaust pipe. Such a design is easy to operate and has low noise on site.

[0011] As an optimization, it also includes a twin-screw air compressor, the outlet of which is connected to the inlet of the jet pump, and is used as a high-pressure air source. The twin-screw air compressor can also serve as a backup air source for the pneumatic motor. This design is convenient for use in places where there is a lack of high-pressure air source underground or the use of high-pressure air source is limited.

[0012] As an optimization, the vacuum storage tank, centrifugal spiral solid-liquid separator and screw conveyor are fixed on a flatbed truck or a mine car. This design is easy to move.

[0013] As an optimization, it also includes a PLC controller. The vacuum storage tank is provided with a liquid level sensor. The suction valve, discharge valve and exhaust valve are all solenoid valves. The liquid level sensor is connected to the signal input end of the PLC controller. The centrifugal screw solid-liquid separator, screw conveyor, twin-screw air compressor and the suction valve, discharge valve and exhaust valve are respectively connected to the signal output end of the PLC controller.

[0014] With this design, the centrifugal screw solid-liquid separator, screw conveyor, twin-screw air compressor suction valve, discharge valve and exhaust valve are all controlled by the PLC controller. The operator only needs to hold the pneumatic coal slurry agitator, stir the coal slurry when the suction pipe has suction, and rest when the suction pipe has no suction.

[0015] The method for using the above-mentioned mine coal slurry cleaning device of the present invention comprises the following steps:

[0016] ①. Open the suction valve, close the discharge valve, open the exhaust valve, connect the inlet of the jet pump to the high-pressure air source, use the jet pump to vacuum the vacuum storage tank, then turn on the pneumatic motor, hold the protective cover of the pneumatic coal sludge agitator, extend the stirring claw into the sludge in the drainage ditch to be cleaned, the water tank in the mining area, or the central water tank in the well, and stir it. The stirred coal sludge is sucked into the vacuum storage tank through the slurry suction pipe and corrugated hose.

[0017] ②. When the coal slurry level in the vacuum storage tank reaches more than 30 cm, turn on the electric stirrer.

[0018] ③. When the coal slurry level in the vacuum storage tank reaches a distance of no more than 10 cm from the lower edge of the ventilation pipe, turn off the pneumatic motor, then close the suction valve, open the discharge valve at the same time, then close the exhaust valve, and then turn on the centrifugal spiral solid-liquid separator and the screw conveyor. The compressed air from the equipped high-pressure air source enters the jet pump and flows back into the vacuum storage tank through the ventilation pipe. The negative pressure in the vacuum storage tank is changed to positive pressure, and the coal slurry in the vacuum storage tank is pressed into the screw conveyor. The water separated by the centrifugal spiral solid-liquid separator flows into the equipped drainage ditch through its liquid phase outlet. The solid coal separated by the centrifugal spiral solid-liquid separator is transferred to the underground equipped belt conveyor through its solid phase outlet and the screw conveyor, and is recycled by the underground equipped belt conveyor.

[0019] ④. When the coal slurry in the vacuum storage tank is completely emptied, return to step ① and repeat steps ①, ② and ③ in the same way until all the cleaning work is completed. This design is convenient and labor-saving.

[0020] The mine coal slurry cleaning device of the present invention is labor-saving and highly efficient, and its use method is simple and easy, and is suitable for cleaning drainage ditches, mining area water tanks and underground central water tanks in coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following is a further description of the coal slurry cleaning device and its use method of the present invention in conjunction with the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the pneumatic coal slurry agitator of the mine coal slurry cleaning device;

[0023] Figure 2 This is a structural schematic diagram of the first implementation mode of the mine coal slurry cleaning device;

[0024] Figure 3 It is a structural schematic diagram of the second implementation mode of the mine coal slurry cleaning device.

[0025] In the figure: 1 is a pneumatic coal sludge agitator, 10 is a corrugated hose, 11 is a pneumatic motor, 12 is a stirring claw, 13 is a slurry suction pipe, 14 is an output shaft, 15 is a protective sleeve, 16 is a bearing, 2 is a vacuum storage tank, 3 is a jet pump, 4 is a centrifugal spiral solid-liquid separator, 5 is a screw conveyor, 6 is an electric stirrer, 7 is a suction pipe, 8 is a vent pipe, 9 is a suction valve, 17 is a discharge valve, 18 is a liquid phase outlet, 19 is a solid phase outlet, 20 is an exhaust pipe, 21 is an exhaust valve, 22 is a liquid level observation window, 23 is a connecting rod, 24 is an operating handle, 25 is a muffler, 26 is a twin-screw air compressor, 27 is a PLC control cabinet, and 28 is a discharge pipe. DETAILED DESCRIPTION

[0026] Implementation method 1: Figure 1 , 2 As shown, the mine coal slurry cleaning device includes a pneumatic coal slurry agitator 1, a vacuum storage tank 2, a jet pump 3, a centrifugal spiral solid-liquid separator 4 and a screw conveyor 5. The pneumatic coal slurry agitator 1 includes a pneumatic motor 11, a stirring claw 12 and a slurry suction pipe 13. The stirring claw 12 is fixed to the lower end of the output shaft 14 of the pneumatic motor 11. A protective sleeve 15 is provided outside the output shaft 14. A bearing 16 is provided between the protective sleeve 15 and the output shaft 14. The slurry suction pipe 13 and the protective sleeve 15 are fixed side by side. The lower end of the slurry suction pipe 13 extends to the lower part of the output shaft 14. An electric stirrer 6 is provided in the vacuum storage tank 2. A suction pipe 7 and a vent pipe 8 are respectively provided on the side wall or the top of the vacuum storage tank 2. The vent pipe 8 is communicated with the suction port of the jet pump 3. A suction valve 9 is provided on the suction pipe 7, and is connected to the upper end of the slurry suction pipe 13 on the pneumatic coal slurry agitator 1 through a corrugated hose 10. The ports are connected, the inlet of the jet pump 3 is connected to a high-pressure gas source (not shown in the figure), a discharge pipe 28 is provided at the bottom of the vacuum storage tank 2, and a discharge valve 17 is provided on the discharge pipe 28, and the discharge pipe 28 is connected to the feed pipe of the centrifugal spiral solid-liquid separator 4 through a pipeline, the liquid phase outlet 18 of the centrifugal spiral solid-liquid separator 4 is connected to a drainage ditch (not shown in the figure) used underground, the solid phase outlet 19 of the centrifugal spiral solid-liquid separator 4 is connected to the inlet of the screw conveyor 5, and the outlet of the screw conveyor 5 is facing the upper belt of the underground belt conveyor (not shown in the figure), the suction valve 9 and the discharge valve 17 are controlled in linkage, and the switch states are opposite (when one is fully open, the other must be fully closed), the outlet of the jet pump 3 is connected to an exhaust pipe 20, and an exhaust valve 21 is provided on the exhaust pipe 20, and a liquid level observation window 22 is also provided on the vacuum storage tank 2.

[0027] The suction valve 9 and the discharge valve 17 are linked by a connecting rod 23, on which an operating handle 24 is provided, and the exhaust pipe 20 is provided with a muffler 25. When manually controlled, the suction valve 9, the discharge valve 17 and the exhaust valve 21 can all be ball valves.

[0028] The method for using the mine coal slurry cleaning device according to the first embodiment of the present invention comprises the following steps:

[0029] ①. Open the suction valve 9, close the discharge valve 17 at the same time, open the exhaust valve 21, connect the inlet of the jet pump 3 to the high-pressure gas source (not shown in the figure), use the jet pump 3 to vacuum the vacuum storage tank 2, then turn on the pneumatic motor 11, hold the protective cover 15 of the pneumatic coal sludge agitator, extend the stirring claw 12 into the sludge in the drainage ditch to be cleaned or the water tank in the mining area or the central water tank in the well (not shown in the figure), and stir it. The stirred coal sludge is sucked into the vacuum storage tank 2 through the slurry suction pipe 13 and the corrugated hose 10.

[0030] ②. When the coal slurry level in the vacuum storage tank 2 reaches more than 30 cm, turn on the electric stirrer 6.

[0031] ③. When the coal slurry level in the vacuum storage tank 2 reaches a distance of no more than 10 cm from the lower edge of the ventilation pipe 8, the pneumatic motor 11 is turned off, and then the suction valve 9 is closed, and the discharge valve 17 is opened at the same time, and then the exhaust valve 21 is closed, and then the centrifugal spiral solid-liquid separator 4 and the screw conveyor 5 are turned on. After the compressed air from the equipped high-pressure air source enters the jet pump 3, it flows back into the vacuum storage tank 2 through the ventilation pipe 8, and the negative pressure in the vacuum storage tank 2 is changed to positive pressure, and the coal slurry in the vacuum storage tank 2 is pressed into the screw conveyor 5. The water separated by the centrifugal spiral solid-liquid separator 4 flows into the equipped drainage ditch through its liquid phase outlet 18, and the solid coal separated by the centrifugal spiral solid-liquid separator 4 is transferred to the underground equipped belt conveyor (not shown in the figure) through its solid phase outlet 19 and the screw conveyor 5, and is recycled by the underground equipped belt conveyor.

[0032] ④. When the coal slurry in the vacuum storage tank 2 is completely emptied, return to step ① and repeat steps ①, ②, and ③ in the same steps and methods until all the cleaning work is completed.

[0033] Implementation method 2: Figure 3 As shown, it also includes a twin-screw air compressor 26 and a PLC controller. The PLC controller is arranged in a PLC control cabinet 27. The outlet of the twin-screw air compressor 26 is communicated with the inlet of the jet pump 3 and is used as a high-pressure air source.

[0034] As an optimization, the vacuum storage tank 2, the centrifugal screw solid-liquid separator 4 and the screw conveyor 5 are respectively fixed on a flatbed truck or a mine car, which is not shown in the figure.

[0035] The vacuum storage tank 2 is provided with a liquid level sensor (not shown in the figure), the suction valve 9, the discharge valve 17 and the exhaust valve 21 are all solenoid valves, the liquid level sensor is connected to the signal input end of the PLC controller, the centrifugal screw solid-liquid separator 4, the screw conveyor 5, the twin-screw air compressor 26 and the suction valve 9, the discharge valve 17 and the exhaust valve 21 are respectively connected to the signal output end of the PLC controller, and the remaining structures are as described in the first embodiment and are omitted.

Claims

1. A mine coal slurry cleaning device, characterized in that: The invention comprises a pneumatic coal slime agitator, a vacuum storage tank, a jet pump, a centrifugal spiral solid-liquid separator and a screw conveyor. The pneumatic coal slime agitator comprises a pneumatic motor, a stirring claw and a slurry suction pipe. The stirring claw is fixed to the lower end of the output shaft of the pneumatic motor. A protective sleeve is arranged outside the output shaft. A bearing is arranged between the protective sleeve and the output shaft. The slurry suction pipe is fixed side by side with the protective sleeve. The lower end of the slurry suction pipe extends to the lower part of the output shaft. An electric stirrer is arranged in the vacuum storage tank. The side wall or top part of the vacuum storage tank is provided with a plurality of electric stirrers. A suction pipe and a vent pipe are provided respectively, the vent pipe is communicated with the suction port of the jet pump, a suction valve is provided on the suction pipe, and is communicated with the upper port of the slurry suction pipe on the pneumatic coal slurry agitator through a corrugated hose, the inlet of the jet pump is communicated with a high-pressure gas source, a discharge pipe is provided at the bottom of the vacuum storage tank, the discharge pipe is provided with a discharge valve, and is communicated with the feed pipe of the centrifugal spiral solid-liquid separator through a pipeline, the liquid phase outlet of the centrifugal spiral solid-liquid separator is communicated with the underground drainage ditch, and the centrifugal The solid phase outlet of the centrifugal spiral solid-liquid separator is communicated with the inlet of the screw conveyor, and the outlet of the screw conveyor is directly opposite to the upper belt of the underground belt conveyor. The suction valve and the discharge valve are controlled in linkage, and the switch states are opposite. The outlet of the jet pump is connected with an exhaust pipe, and an exhaust valve is provided on the exhaust pipe. A liquid level observation window is also provided on the vacuum storage tank. The suction valve and the discharge valve are linked by a connecting rod, and an operating handle is provided on the connecting rod. A muffler is provided on the exhaust pipe, which also includes a twin-screw air compressor, and the outlet of the twin-screw air compressor is communicated with the inlet of the jet pump, which is used as a high-pressure air source. It also includes a PLC controller, and a liquid level sensor is provided on the vacuum storage tank. The suction valve, the discharge valve and the exhaust valve are all solenoid valves. The liquid level sensor is connected to the signal input end of the PLC controller, and the centrifugal spiral solid-liquid separator, the screw conveyor, the twin-screw air compressor, the suction valve, the discharge valve and the exhaust valve are respectively connected to the signal output end of the PLC controller.

2. The mine coal slurry cleaning device according to claim 1, characterized in that: The vacuum storage tank, the centrifugal screw solid-liquid separator and the screw conveyor are respectively fixed on a flatbed car or a mine car.

3. A method for using the mine coal slurry cleaning device according to claim 1, comprising the following steps: ①. Open the suction valve, close the discharge valve, open the exhaust valve, connect the inlet of the jet pump to the high-pressure air source, use the jet pump to vacuum the vacuum storage tank, then turn on the pneumatic motor, hold the protective cover of the pneumatic coal sludge agitator, extend the stirring claw into the sludge in the drainage ditch to be cleaned, the water tank in the mining area, or the central water tank in the well, and stir it. The stirred coal sludge is sucked into the vacuum storage tank through the slurry suction pipe and corrugated hose. ②. When the coal slurry level in the vacuum storage tank reaches more than 30 cm, turn on the electric stirrer. ③. When the coal slurry level in the vacuum storage tank reaches a distance of no more than 10 cm from the lower edge of the ventilation pipe, turn off the pneumatic motor, then close the suction valve, open the discharge valve at the same time, then close the exhaust valve, and then turn on the centrifugal spiral solid-liquid separator and the screw conveyor. The compressed air from the equipped high-pressure air source enters the jet pump and flows back into the vacuum storage tank through the ventilation pipe. The negative pressure in the vacuum storage tank changes to positive pressure, and the coal slurry in the vacuum storage tank is pressed into the screw conveyor. The water separated by the centrifugal spiral solid-liquid separator flows into the equipped drainage ditch through its liquid phase outlet. The solid coal separated by the centrifugal spiral solid-liquid separator is transferred to the underground equipped belt conveyor through its solid phase outlet and the screw conveyor, and is recycled by the underground equipped belt conveyor. ④. When the coal slurry in the vacuum storage tank is completely emptied, return to step ① and repeat steps ①, ②, and ③ in the same steps and methods until all cleaning work is completed.

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