An underground powder storage system

Abstract

This invention relates to an underground powder storage system, comprising a storage silo located at the bottom of a coal mine, with an inlet and an outlet at its upper end and a discharge port at its lower end; a feeding pipe, the lower end of which connects to the inlet of the storage silo inside the mine, and the upper end extending to the ground to form a feeding port; an induced draft pipe, one end of which connects to the outlet of the discharge silo, and the other end of which is equipped with an induced draft fan to create negative pressure inside the storage silo; and a dust suppression spraying device installed on the induced draft pipe to remove powder from the induced draft pipe. The induced draft fan allows the powder to enter the storage silo under negative pressure. The powder entering the storage silo is filtered and sprayed down, preventing the powder from polluting the underground environment and allowing it to be used entirely for underground filling, thus preventing safety hazards caused by powder overflow from the storage silo.

Description

Technical Field

[0001] This invention relates to an underground powder storage system. Background Technology

[0002] Coal mining and utilization generate large amounts of solid waste (coal gangue, fly ash, coal slime, coal slag, rock cores, and slurry) and mine water, causing serious pollution to the ecological environment. To address the pollution caused by coal mine waste and mine water, a treatment process for coal mine solid waste and mine water is adopted. The solid waste is crushed and pulverized, then transported underground, mixed and slurried in the underground coal mine roadways, and used for backfilling.

[0003] Transporting powder materials from the surface to underground tunnels by vehicle is costly and unsuitable for large-scale transport and filling. Another method involves preparing the slurry on the surface and transporting it through vertical pipelines connecting the surface and underground. This method requires pumping mine water to the surface for slurry preparation, increasing the cost of pumping mine water.

[0004] Ground-based pulverization followed by underground slurry preparation is currently the most economical filling process. However, underground coal mines have strict explosion-proof requirements. After the powdered particles fall from the ground into the silo hundreds of meters deep, dust disposal is an urgent problem to be solved. If the dust cannot be effectively disposed of, it can easily cause an explosion underground. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an underground powder storage system that solves the problem of how to safely handle powder falling from the bottom surface into the underground storage silo for storage.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A downhole powder storage system is provided, including

[0008] The storage bin is located at the bottom of the coal mine shaft, with a feed inlet and an air outlet at the top and a discharge outlet at the bottom.

[0009] The feeding pipe has its lower end connected to the inlet of the storage silo inside the well, and its upper end extends to the ground to form a feeding port;

[0010] The exhaust duct is connected at one end to the air outlet of the discharge hopper, and the exhaust fan is installed at the other end to create negative pressure inside the storage hopper.

[0011] A dust suppression spraying device is installed on the exhaust duct to remove dust from inside the exhaust duct.

[0012] Furthermore, a dust suppression mechanism is installed in the material feeding area on the ground, the dust suppression mechanism including...

[0013] The support frame is set up in the material feeding area on the ground;

[0014] Multiple atomizing nozzles are mounted on a support frame, and the spray from each nozzle is suitable for dust suppression in the feeding area.

[0015] Furthermore, a conical hopper is provided at the feeding port, with its lower end connected to the feeding port and multiple atomizing nozzles arranged around its upper end. Each atomizing nozzle is suitable for spraying the feeding area to reduce dust in the air during feeding.

[0016] Furthermore, the dust suppression spray device includes

[0017] A spray box, which is equipped with two spray chambers, a ventilation chamber and a mud chamber;

[0018] The mud chamber is located below the spray chamber and the ventilation chamber, and is connected vertically.

[0019] The upper ends of the two spray chambers are connected, and the lower end of the ventilation chamber is connected to the lower end of the adjacent spray chamber; the ventilation chamber and the side spray chambers are connected to the air duct.

[0020] The spray pipe is connected at its lower end to the water level line of the mud chamber, and two spray chambers are set at its upper end and connected to spray heads. A circulating water pump is installed on the spray pipe.

[0021] A mud pump, located at the bottom of the mud chamber, is suitable for discharging the mud formed inside the mud chamber.

[0022] Furthermore, a belt conveyor is installed below the discharge port of the storage silo.

[0023] Furthermore, a star-shaped ash discharge valve is installed at the discharge port of the storage silo.

[0024] Furthermore, a filter assembly is installed at the air outlet of the discharge hopper to filter out powder inside the air outlet.

[0025] The beneficial effects of this invention are:

[0026] The induced draft fan allows the powder to enter the storage silo under negative pressure. Once inside the silo, the powder is filtered and sprayed down, preventing pollution of the underground environment. All the powder can be used for underground filling, thus preventing safety hazards caused by powder overflow from the storage silo. Attached Figure Description

[0027] The invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the surface portion of the downhole powder storage system of the present invention;

[0029] Figure 2 This is a schematic diagram of the downhole powder storage system of the present invention;

[0030] Figure 3 This is a schematic diagram of a dust suppression spray system;

[0031] in,

[0032] 1. Storage silo; 11. Feeding pipe; 12. Conical hopper; 13. Rotary rotary valve.

[0033] 21. Bracket; 22. Atomizing nozzle;

[0034] 31. Exhaust duct; 32. Filter assembly; 33. Exhaust fan;

[0035] 4. Spray dust suppression device; 41. Spray chamber; 42. Ventilation chamber; 43. Spray pipe; 44. Mud chamber; 45. Mud pump; 46. Circulating water pump.

[0036] 5. Belt conveyor. Detailed Implementation

[0037] The present invention will now be further described with reference to specific embodiments. These accompanying drawings are simplified schematic diagrams illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0038] like Figures 1 to 3 As shown, an underground powder storage system includes...

[0039] Storage bin 1 is located at the bottom of the coal mine shaft, with a feed inlet and an air outlet at its upper end and a discharge outlet at its lower end;

[0040] The feeding pipe 11 has its lower end connected to the inlet of the storage silo 1 inside the well, and its upper end extends to the ground to form a feeding port;

[0041] The exhaust pipe 31 is connected at one end to the exhaust port of the discharge hopper, and the exhaust fan 33 is installed at the other end to create a negative pressure in the storage hopper 1.

[0042] The dust suppression spray device 4 is installed on the duct of the exhaust pipe 31 to remove powder from the exhaust pipe 31.

[0043] In this embodiment, the feeding pipe 11 is selected according to the actual well depth, and is generally hundreds of meters long, running vertically from the ground to the bottom of the well.

[0044] During the material feeding process, a large amount of dust will be generated in the area near the feeding port. To address this dust issue, in this embodiment, a dust suppression mechanism is installed in the material feeding area on the ground. The dust suppression mechanism includes...

[0045] Support 21 is set in the material feeding area on the ground;

[0046] Multiple atomizing nozzles 22 are mounted on a support 21, and the spray from each atomizing nozzle 22 is suitable for dust suppression in the feeding area.

[0047] Preferably, a conical hopper 12 is provided at the feeding port, with its lower end connected to the feeding port and multiple atomizing nozzles 22 arranged around its upper end. Each atomizing nozzle 22 is suitable for spraying inside the conical hopper 12 to reduce dust when feeding material into the conical hopper 12.

[0048] When feeding materials, turn on each atomizing nozzle 22 to spray water mist to ensure that the dust at the feeding port meets the standard.

[0049] Specifically, as an optional implementation method in this embodiment, such as Figure 3 As shown, the dust suppression spray device 4 includes

[0050] A spray box, wherein two spray chambers 41, a ventilation chamber 42 and a mud chamber 44 are provided inside the spray box;

[0051] The mud chamber 44 is located below the spray chamber 41 and the ventilation chamber 42, and is connected vertically.

[0052] The upper ends of the two spray chambers 41 are connected, and the lower end of the ventilation chamber 42 is connected to the lower end of the adjacent spray chamber 41; the ventilation chamber 42 and the side spray chambers 41 are connected to the air duct 31.

[0053] The lower end of the spray pipe 43 is connected to the water level line of the mud chamber 44, and the upper end of the pipe is provided with two spray chambers 41 and connected to spray heads. A circulating water pump 46 is installed on the spray pipe 43.

[0054] A mud pump 45 is located at the bottom of the mud chamber 44 and is suitable for discharging the mud formed in the mud chamber 44.

[0055] Working principle of the spray dust suppression device 4: The mud chamber 44 is filled with spray water. The circulating water pump 46 draws spray water and sprays it out from the two spray chambers 41 to spray the powder entering the spray chamber 41. After the powder comes into contact with water, it falls into the mud chamber 44. Although it works continuously, the mud concentration in the mud chamber 44 will become higher and higher. The water inlet of the spray pipe 43 is set at a relatively high position, generally at the water level line, to ensure that clean liquid can be drawn from the upper end for spraying. After the feeding is completed, the mud produced in the mud tank is discharged in time by the mud pump 45, and then clean water is added to prepare for the next feeding and spraying.

[0056] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, a belt conveyor 5 is installed below the discharge port of the storage silo 1. The belt conveyor 5 facilitates the output of powder from the storage silo 1 for use.

[0057] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, a star-shaped ash discharge valve 13 is installed at the discharge port of the storage silo 1.

[0058] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, a filter assembly 32 is installed at the air outlet of the discharge hopper to filter the powder inside the air outlet. In this embodiment, the filter assembly 32 is an existing mature product, and it will not be described in detail here.

[0059] Working process of the underground powder storage system of this invention:

[0060] After the ground crushing and pulverizing process, a dump truck transports the powdered material to the feeding port. The atomizing nozzles 22 on the ground start spraying water mist to reduce dust on the ground. The powder enters the underground storage silo 1 through the feeding port and feeding pipe 11. In order to allow the powder to enter the silo smoothly, the induced draft fan 33 is turned on, and a negative pressure is formed in the storage silo 1 through the induced draft pipe 31. At the same time, a negative pressure is formed at the feeding port on the ground. Some of the powder passes through the filter component 32 with the air and remains in the silo. A small amount of powder still passes through the filter component 32 and enters the spray dust removal device along with the air through the induced draft pipe 31.

[0061] Air and powder are sprayed through two spray chambers 41, the powder and water enter the mud chamber 44 below, and the clean air is discharged from the blower 33.

[0062] Inside the mud chamber 44, powder settles downwards while clear water is at the top. A circulating water pump 46 pumps the clear water into two spray chambers for spraying, circulating continuously. The powder mud deposited at the bottom of the mud chamber 44 is transported to the filling area for filling via a mud pump 45 at the bottom of the conical hopper.

[0063] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An underground powder storage system, characterized in that, include The storage bin is located at the bottom of the coal mine shaft, with a feed inlet and an air outlet at the top and a discharge outlet at the bottom. The feeding pipe has its lower end connected to the inlet of the storage silo inside the well, and its upper end extends to the ground to form a feeding port; The exhaust duct is connected at one end to the air outlet of the storage silo, and the exhaust fan is installed at the other end to create negative pressure inside the storage silo. A dust suppression spraying device is installed on the exhaust duct to remove dust from inside the exhaust duct. A dust suppression mechanism is installed in the material feeding area on the ground. The dust suppression mechanism includes... The support frame is set up in the material feeding area on the ground; Multiple atomizing nozzles are mounted on a support, and the spray from each nozzle is suitable for dust suppression in the feeding area. The dust suppression spray device includes A spray box, which is equipped with two spray chambers, a ventilation chamber and a mud chamber; The mud chamber is located below the spray chamber and the ventilation chamber, and is connected vertically. The upper ends of the two spray chambers are connected, and the lower end of the ventilation chamber is connected to the lower end of the adjacent spray chamber; the ventilation chamber and the side spray chambers are connected to the air duct. The spray pipe is connected at its lower end to the water level line of the mud chamber, and two spray chambers are set at its upper end and connected to spray heads. A circulating water pump is installed on the spray pipe. A mud pump, located at the bottom of the mud chamber, is suitable for discharging the mud formed inside the mud chamber.

2. The downhole powder storage system according to claim 1, characterized in that, The feeding port is equipped with a conical hopper, the lower end of which is connected to the feeding port, and multiple atomizing nozzles are arranged around the upper end of the hopper. Each atomizing nozzle is suitable for spraying the feeding area to reduce dust in the feeding area.

3. The downhole powder storage system according to claim 1, characterized in that, A belt conveyor is installed below the discharge port of the storage silo.

4. The downhole powder storage system according to claim 1, characterized in that, A star-shaped ash discharge valve is installed at the discharge port of the storage silo.

5. The downhole powder storage system according to claim 1, characterized in that, The air outlet of the storage silo is equipped with a filter assembly to filter out powder inside the air outlet.

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