CN108194123B - A coal mine underground dust removal device and dust removal method - Google Patents

Abstract

The utility model relates to an underground coal mine dust removal device, which belongs to the field of dust removal. Including: ejector, pneumatic fan, mixing cylinder, dust removal chamber, filter polygonal cylinder, outlet chamber, mobile bracket, which uses wind flow from the air inlet and compressed air inlet to drive the pneumatic fan to rotate, the jet of dry fog nozzle, ejection The water flow is connected to the dry fog nozzle, and the gas-liquid mixture forms a spray in the pneumatic fan, mixing cylinder and dust removal chamber, sucking the dirty air into the cylinder from the outside, and at the same time, the airflow in the ejector ejects the pollution from the air-introduction port. The wind enters the dust removal room, absorbs dust through the dry mist, and removes dust from the polygonal mesh filter cartridge. The air after dust removal enters the outlet room through the outlet of the filter cartridge and is finally discharged into the roadway. When the air flow enters, the filter cartridge starts to rotate at the same time, making The dust particles on the drum net fall into the dust discharge groove and are discharged from the dust outlet. It has the advantages of high dust removal efficiency, small size, convenient operation, removable, thorough treatment of respirable dust, simple structure and low dust removal cost.

Description

A coal mine underground dust removal device and dust removal method

technical field

The invention relates to a dust removal device and a dust removal method, in particular to an underground dust removal device and a dust removal method used in underground mining.

Background technique

Coal mine dust is one of the disasters of underground coal mine mining. During the process of tunneling or mining, the greater the dust, the lower the visibility, which will affect the operation of workers, and prone to operational errors, resulting in industrial accidents. At the same time, the existence of dust will accelerate the wear of bearings and gear equipment, block equipment, pollute hydraulic oil and lubricating oil, reduce the service life of equipment, and increase equipment maintenance costs. The respirable dust produced during the mining process is very harmful to human health, and often makes operators suffer from pneumoconiosis. And when the dust concentration reaches 35mg/m ³ , when there is enough ignition energy, a coal dust explosion will occur, causing greater losses. Therefore, the elimination of coal mine dust is very important to maintain the normal operation of mechanical equipment, ensure the life and health of employees, and prevent accidents.

The current dust removal methods in coal mines mainly include spray dust reduction, wind dust removal, and filter bag dust removal. The particle size of the spray dust is large, and the working space is limited, the dust removal efficiency is not high, and the treatment of the respirable dust which is extremely harmful to the human body is not thorough; although the filter bag dust removal has a good dust removal effect on the respirable dust, it is limited by the roadway space. At the same time, there is a problem of dust removal; and by increasing the air volume, the dust-laden air can be diluted, but the effect is not obvious, and it is difficult to increase the air volume due to the limitation of compressed air and power.

Contents of the invention

Technical problem: Facing the deficiencies of the above-mentioned technologies, provide a coal mine with high dust removal efficiency, small size, convenient operation, removable, thorough treatment of respirable dust, simple structure, and low cost of dust removal, which can be applied to dust removal on the driving surface Downhole dedusting device and dedusting method.

Technical solution: In order to achieve the above technical purpose, the coal mine underground dust removal device of the present invention includes an air induction part, a dust removal part and an outlet part. The air induction part is arranged at the front end of the dust removal part, and the outlet part is arranged at the rear end of the dust removal part. The parts are connected as one, and there are mobile brackets under the air induction part and the dust removal part;

The air-inducing part includes: an ejector arranged horizontally, a pneumatic fan, a mixing cylinder and a dry fog nozzle, wherein the ejector and the pneumatic fan are arranged side by side, and the ejector and the pneumatic fan are connected to the front end of the mixing cylinder respectively, and the mixing cylinder The rear end is connected with the dust removal part; the ejector includes an ejection chamber, the front end of the ejection chamber is provided with a pressurized air inlet, and the ejection chamber is provided with a trumpet-shaped opening air inlet facing the front end, and the rear of the ejection chamber is connected by a reducer There is a mixing chamber, and the rear end of the mixing chamber is provided with a diffusion port with a gradually expanding radius, and the diffusion port is set in the mixing cylinder; the pneumatic fan includes fan blades and a fan frame, and the fan frame is equipped with a dry fog nozzle, and the dry fog nozzle is equipped with a There is an air outlet of the pneumatic fan and a water inlet, and an air inlet connected to the hose leading out of the compressed air pipeline is provided under the pneumatic fan;

The dust removal part includes: a dust removal chamber, a polygonal mesh filter cartridge, a dust discharge tank, and a dust outlet; the dust removal chamber is a cylindrical hollow cylinder structure, the head of the dust removal chamber is matched with the mixing cylinder, and the tail of the dust removal chamber is connected to the outlet. Partially connected, there is an oblique dust discharge trough under the dust removal chamber, and a dust outlet at the bottom of the dust discharge trough. The polygonal mesh filter cartridge is installed in the dust removal chamber, and the tail of the polygonal mesh filter cartridge is connected to the outlet part;

The outlet part includes: an outlet chamber and an outlet screen; the outlet chamber is a horn structure with a small front and a large rear. set on the exit chamber;

The mobile support is above and has a height adjustment button for adjusting the height of the mobile support.

The polygonal mesh surface filter cartridge includes a flat filter screen, a hemispherical filter screen, a filter cartridge shaft, a support sleeve, a support rod, a rotating blade, and a filter grid; wherein the filter cartridge shaft is fixed at the outlet of the dust removal chamber through a plurality of shaft support rods On the wall, the flat filter screen is fixed on the support shaft sleeve through the support rod, and the support shaft sleeve is provided between the filter cartridge shaft and the multiple support rods. There are multiple filter meshes on the filter screen, and a hemispherical surface Filter screen, the tail of the filter cartridge with polygonal mesh surface is the outlet of the dust removal chamber, and there is no filter screen at the rear of the filter cartridge outlet.

The surface of the filter screen of the polygonal mesh surface filter cartridge is wrinkled and undulating. The mesh size and number of filter screen layers of the entire flat filter screen and hemispherical filter screen are determined comprehensively by dust removal requirements and air volume. Rotating blades, the plurality of rotating blades are arranged at intervals of 90 degrees around the axis of the filter cartridge, 3 rows are arranged on the entire surface of the cylinder, and a total of 12 rotating blades are arranged. Under the action of air flow, the multiple rotating blades will drive the entire polygonal mesh surface filter cartridge The filter cartridge shaft rotates.

The air inlet and the compressed air inlet are connected with the compressed air pipeline by rubber hoses. Similarly, the water supply pipeline and the water inlet of the dry fog nozzle are also connected by rubber hoses. There are regulating valves and pressure flow valves on the rubber hoses, and the pressure flow valves can be instantly displayed. The flow and pressure of the rubber hose are controlled by adjusting the regulating valve to control the pressure and flow of the gas and water flow input to the device.

The welding connection between the pneumatic fan and the mixing cylinder, the mixing cylinder and the pneumatic fan are welded on the mobile bracket, the height adjustment button on the mobile bracket is adjusted by perforation, the mobile bracket legs have round holes with equal diameters at certain heights, through Adjust the alignment of the round holes in different positions and insert the button to adjust the height.

The bottom of the dust removal chamber is a dust discharge trough inclined downwards. The depth and inclination angle of the dust discharge trough can be determined according to the difficulty of the dust particles sliding down. The port of the dust discharge trough is the dust outlet. slide out.

The air induction part and the dust removal part are connected by buckles, the front end of the port connection is the mixing tube, and the rear part of the port connection is the inlet of the dust removal chamber.

A dust removal method for a coal mine underground dust removal device, the steps are as follows:

a First, connect the air induction part and the dust removal part of the dust removal device through buckles, connect the two rubber hoses leading out of the pressure air pipeline with the air inlet and the pressure air inlet respectively through threads, and connect the rubber hoses leading out of the underground water supply pipeline Connect the water inlet of the dry fog nozzle through a threaded connection;

b. Adjust the regulating valves on each rubber hose to adjust the pressure of the airflow and water flow. After the high-speed airflow enters through the rubber hose from the pressure air inlet of the ejector, a negative pressure is formed in the ejection chamber, and the negative pressure of the ejection chamber pushes the trumpet-shaped air inlet The external dusty air is brought into the injection chamber, and is further accelerated in the constrictor through the compressed air flow entering from the compressed air inlet, and then enters the mixing chamber to make the dusty air and compressed air flow, and finally sprays out from the diffuser into the mixing chamber. In the cylinder; the airflow enters the pneumatic fan to drive the fan blades to rotate, and the dusty gas is sucked into the dust collector. After the airflow passes through the fan, it enters the dry fog nozzle from the airflow outlet, and mixes with the water flow from the water inlet of the dry fog nozzle to form a spray. The mixing cylinder and the dust removal chamber absorb and reduce dust from the dusty gas inhaled from the ejector and the pneumatic fan;

c The inhaled dust-laden airflow enters the dust removal chamber through the mixing cylinder, and the dust particles with a particle size > 30 μm fall freely under the action of the spray, and fall to the bottom of the dust removal chamber or adhere to the filter screen of the polygonal mesh filter cartridge, and the particle size is ≤ 30 μm The dust particles are attached and intercepted on the filter screen of the filter cartridge. At the same time, the rotating blades on the outer surface of the polygonal filter cartridge drive the polygonal filter cartridge to rotate under the push of the dusty air flow. When the polygonal mesh surface filter cartridge rotates, it is intercepted and attached to the filter screen. Dust particles fall to the bottom of the dust removal chamber under the action of centrifugal force and gravity. When the accumulation of dust particles falling to the bottom of the dust removal chamber reaches a certain amount, under the action of gravity, they gradually slide to the dust discharge groove in the center, and finally Discharge from the dust outlet along the dust discharge slot;

d. The dust-laden airflow filtered by the polygonal mesh filter cartridge enters the outlet chamber from the outlet of the polygonal filter cartridge, and the mouth filter set at the rear of the outlet chamber intercepts excess water and finer dust particles in the filtered dust-laden airflow Finally, clean air freed from dust particles is conveyed from the outlet chamber into the roadway.

Beneficial effects, the dust removal device of the present invention can use the airflow of the compressed air pipeline in the well as the power of the entire dust collector, and use the water flow of the water supply pipeline as the water flow of the dry fog nozzle, and the air flow drives the pneumatic fan to operate to suck in the dirty air and eject it The dust-laden air is ejected by the device, and then the dry fog generated by the dry fog nozzle has the effect of absorbing and reducing dust on the dust particles in the air. The dust particles further enter the dust removal room with the wind flow, and the larger dust particles fall in the dust removal room. The falling dust continues to attach and intercept on the polygonal filter, and then the filtered air enters the interior of the polygonal mesh filter cartridge through the filter, and enters the outlet chamber through the outlet of the polygonal mesh filter cartridge and the outlet of the dust removal chamber. When the air flow enters the dust removal chamber, the rotating blades outside the polygonal mesh filter cartridge drive the filter cartridge to rotate around the filter cartridge axis, and the dust particles attached to the filter screen fall to the bottom of the dust removal chamber due to centrifugal force and gravity, and the accumulated dust at the bottom of the dust removal chamber The particles slide down into the dust discharge chute, and finally go out of the dust removal device from the dust removal port along the dust discharge chute. The clean air entering the outlet chamber is further filtered by the outlet screen, leaving more moisture and finer dust particles in the air on the net, and then the clean air is discharged into the air from the outlet screen, thus completing the purification of the air. Remove dust to get clean air with proper humidity.

Advantages: the dust removal device of the present invention is small in size, light in weight, easy to move, high in dust removal efficiency, utilizes underground compressed air pipelines and water supply pipelines, has strong applicability, and low cost.

(1) Utilize the pressure provided by the compressed air pipeline in the well as the power of the pneumatic fan and ejector to suck the dirty air into the mixing cylinder, and at the same time use the outlet gas used by the pneumatic fan as the working fluid and the water flow provided by the water supply pipeline Form spray, strong applicability, greatly reduce cost.

(2) The combination of the pneumatic fan and the ejector makes the induced air volume meet the requirements of most small and medium-sized mine excavation face sewage air treatment volume, and at the same time, the dry fog nozzle in the fan barrel has the effect of absorbing and reducing dust on the dusty air , while satisfying the function of induced air volume, the respirable dust is thoroughly treated.

(3) The polygonal mesh surface filter cartridge plays the role of attaching and intercepting dust particles, and at the same time, the outlet screen filters water and dust particles again, with high dust removal efficiency and clean air with suitable humidity.

(4) There are rotating blades on the polygonal filter cartridge, which does not require additional power. It can drive the cylinder to rotate when the dirty wind enters, and rely on the centrifugal force generated by the rotation and the gravity of the dust particles to remove the dust particles attached to the filter screen, reducing Power and filter cleaning procedures.

(5) The dust discharge tank at the lower part relies on the dust particles and the excess water generated by the spray to form a dust-water mixed fluid, which slides down along the dust discharge tank by the gravity of the fluid itself, and is finally discharged from the dust outlet, making dust cleaning convenient.

(6) The entire dust-removing and air-inducing device is small in size and light in weight. The air-inducing part and the dust-removing part are located on two mobile brackets. When it is inconvenient to move as a whole, it can be divided into two parts by opening the buckle and moved separately, and then finally arrives at the place of use. merged together again. At the same time, there is a height adjustment button on the bracket, which can adjust the height and angle of the entire dust removal device according to the position of dust generation, so as to achieve better dust removal effect.

(7) The entire dedusting device is made of metal conductors, using compressed air as power, without generating static electricity, and safe to use in coal mines. And the device is easy to operate, easy to disassemble, good in durability, and easy for workers to operate.

Description of drawings

Fig. 1 is a schematic structural view of the coal mine underground dust removal device of the present invention.

Fig. 2 is a schematic structural view of the polygonal mesh surface filter cartridge of the coal mine underground dust removal device of the present invention.

Fig. 3 is a cross-sectional view of the filter screen on the filter cartridge of the coal mine underground dust removal device of the present invention.

Fig. 4 is a flow diagram of the wind flow when the coal mine underground dust removal device of the present invention is working.

Fig. 5 is an A-A view of the filter screen on the filter cartridge of Fig. 3 of the coal mine underground dust removal device of the present invention.

Fig. 6 is a B-B view of the upper filter screen of the filter cartridge in Fig. 3 of the coal mine underground dust removal device of the present invention.

In the figure: 1, ejector; 1-1, pressurized air inlet; 1-2, ejection chamber; 1-3, air inlet; 1-4, reducer; 1-5, mixing chamber; 1-6 , diffusion port; 2, pneumatic fan; 2-1, air inlet; 2-2, air outlet; 3, mixing cylinder; 4, dry fog nozzle; 4-1, water inlet; 5, dust chamber; 5-1, Shaft support rod; 6, polygon mesh surface filter cartridge; 6-1, flat filter screen; 6-2, hemispherical filter screen; 6-3, filter cartridge shaft; 6-4, support shaft sleeve; 6-5, support Rod; 6-6, rotating blade; 6-7, filter mesh; 7, dust discharge groove; 8, dust outlet; 9, outlet chamber; 9-1, outlet filter screen; 10, mobile bracket; 11, height Adjusting button; 12, buckle; 13, rubber hose; 14, regulating valve; 15, pressure flow meter.

Detailed ways

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the coal mine underground dust removal device of the present invention includes an air-inducing part, a dust-removing part and an outlet part. Connected as a whole, there are mobile brackets 10 under the air induction part and the dust removal part;

The air-inducing part includes: an ejector 1 arranged horizontally, a pneumatic fan 2, a mixing cylinder 3 and a dry fog nozzle 4, wherein the ejector 1 and the pneumatic fan 2 are arranged side by side, and the ejector 1 and the pneumatic fan 2 are respectively connected to The front end of the mixing cylinder 3 is connected, and the rear end of the mixing cylinder 3 is connected with the dust removal part; -2 is provided with a trumpet-shaped opening air inlet 1-3 facing the front end, and the rear of the injection chamber 1-2 is connected to the mixing chamber 1-5 through the reducer 1-4, and the rear end of the mixing chamber 1-5 is provided with a radius gradually Expanded diffuser ports 1-6, diffuser ports 1-6 are arranged in the mixing cylinder 3; the pneumatic fan 2 includes fan blades and a fan frame, the fan frame is provided with a dry fog nozzle 4, and the dry fog nozzle 4 is provided with Pneumatic fan air outlet 2-2 and water inlet 4-1, the air flow inlet 2-1 connected with the rubber hose 13 drawn out from the compressed air pipeline is provided under the pneumatic fan 2; the air flow inlet 2-1 and the compressed air inlet 1-1 The hose 13 is used to connect the pressure air pipeline. Similarly, the water supply pipeline and the water inlet 4-1 of the dry fog nozzle are also connected by the hose 13. The hose 13 is provided with a regulating valve 14 and a pressure flowmeter 15. The pressure flowmeter 15 can be Immediately display the flow and pressure through the rubber hose, and control the pressure and flow of gas and water flow input to the device by adjusting the regulating valve 14;

As shown in Figure 2, the dust removal part includes: a dust removal chamber 5, a polygonal mesh filter cylinder 6, a dust discharge tank 7, and a dust outlet 8; 3 Matching connection, the tail of the dust removal chamber 5 is connected with the outlet part, there is an inclined dust discharge tank 7 under the dust removal chamber 5, the bottom of the dust discharge tank 7 is provided with a dust outlet 8, and the bottom of the dust removal chamber 5 is a downward slope. Dust unloading chute 7, the depth and inclination angle of dust unloading chute 7 can be determined according to the difficulty of dust particles sliding down, the port of dust unloading chute 7 is the dust outlet 8, when the amount of dust accumulates to a certain extent, it can slide out freely along the dust unloading chute 7; The air induction part and the dust removal part are connected by buckles 12, the front end of the buckle connection 12 is the mixing cylinder 3, and the rear part of the buckle connection 12 is the entrance of the dust removal chamber 7; the polygonal mesh surface filter cartridge 6 is arranged in the dust removal chamber 5, The tail of the polygonal mesh filter cartridge 6 is connected to the outlet part; the polygonal mesh filter cartridge 6 includes a multi-layer flat filter 6-1, a hemispherical filter 6-2, a filter cartridge shaft 6-3, and a support sleeve 6 -4, support rod 6-5, rotating blade 6-6, filter grid 6-7; as shown in Figure 5, the filter cartridge shaft 6-3 is fixed on the outlet wall of the dust removal chamber through a plurality of shaft support rods 5-1 , the filter cartridge shaft 6-3 and the support rod filter screen 6-1 are fixed on the support sleeve 6-4 through the support rod 6-5, and a support is provided between the filter cartridge shaft 6-3 and a plurality of support rods 6-5 Axle sleeve 6-4, as shown in Figure 3, filter screen 8-1 is provided with a plurality of filter grids 6-7, as shown in Figure 6, filter screen 6-1 head is provided with hemispherical surface filter screen 6- 2. The tail of the polygonal mesh filter cartridge 6 is the outlet of the dust removal chamber 5, and there is no filter screen at the rear of the outlet of the filter cartridge 6; the surface of the filter 6-1 of the polygonal mesh filter cartridge 6 is wrinkled, and the entire filter 6-1 The grid size and the number of layers of the filter screen 6-1 are comprehensively determined by the dust removal requirements and the air volume. There are multiple rotating blades 6-6 inclined on the outer surface of the filter screen 6-1, and the multiple rotating blades 6-6 surround the filter cartridge. Shafts 6-3 are set at intervals of 90 degrees, 3 rows are set on the surface of the entire cylinder, and a total of 12 rotating blades 6-6 are installed. Under the action of air flow, multiple rotating blades 6-6 will drive the entire polygonal mesh filter cartridge 6 around the filter cartridge 6-3 axis rotation;

The outlet part includes: an outlet chamber 9 and an outlet screen 9-1; the outlet chamber 9 is a horn structure with a small front and a large rear, and the front end of the outlet chamber 9 is connected to the tail of the polygonal mesh filter cartridge 6, which is a polygonal mesh filter cartridge The airflow outlet of 6, the outlet screen 9-1 is arranged on the outlet chamber 9;

The pneumatic fan 2 and the mixing cylinder 3 are welded and connected, the mixing cylinder 3 and the pneumatic fan 2 are welded on the mobile bracket 10, the height adjustment button 11 on the mobile bracket 10 is adjusted by perforation, and the legs of the mobile bracket 10 are adjusted at a certain height There are equal-diameter round holes, and the height is adjusted by adjusting the alignment of the round holes in different positions and inserting buttons;

As shown in Figure 4, a kind of dedusting method of coal mine underground dedusting device, its steps are as follows:

a. First connect the air induction part and the dust removal part of the dust removal device through the buckle 12, and connect the two rubber hoses 13 drawn from the pressure air pipeline with the air inlet 2-1 and the pressure air inlet 1-1 respectively through threads Connect the rubber hose 13 led out of the underground water supply pipeline to the water inlet 4-1 of the dry fog nozzle through threaded connection;

b. Adjust the regulating valve 13 on each rubber hose 13 to adjust the pressure of the airflow and water flow. After the high-speed airflow enters from the pressure air inlet 1-1 of the ejector through the rubber hose 13, a negative pressure is formed in the ejection chamber 1-2 to induce The negative pressure of the injection chamber brings the dust-laden air outside the trumpet-shaped air inlet 1-3 into the injection chamber 1-2, and is further accelerated by the compressed air flow entering from the compressed air inlet 1-1 in the reducer 1-4 , and then enter the mixing chamber 1-5 to fully mix the dust-laden air with the compressed air flow, and finally spray out from the diffusion port 1-6 into the mixing cylinder 3; the air flow enters the pneumatic fan 2 to drive the fan blades to rotate, and the dust-laden air is inhaled In the dust collector, the air flow enters the dry mist nozzle 4 from the air outlet 2-2 after passing through the fan, and mixes with the water flow entering from the water flow inlet 4-1 of the dry mist nozzle 4 to form a spray, and the spray is sprayed into the mixing cylinder 3 and the dust removal chamber 5, Adsorb and reduce dust from the dusty gas inhaled from ejector 1 and pneumatic fan 2;

c. The inhaled dust-laden air flow enters the dust removal chamber 5 through the mixing cylinder 3, and the dust particles with a particle size > 30 μm fall freely under the action of the spray, and fall to the bottom of the dust removal chamber 5 or attach to the plane filter of the polygonal mesh filter cartridge 6 On the filter screen 6-1 and the hemispherical filter screen, the dust particles with a particle size of ≤30 μm are attached and intercepted on the flat filter screen 6-1 and the hemispherical filter screen 6-2 of the filter cartridge 6, and the outer surface of the polygonal filter cartridge 6 The rotating blades 6-6 drive the polygonal filter cartridge 6 to rotate under the push of the dust-laden air flow. When the polygonal filter cartridge 6 rotates, the dust particles that are intercepted and attached to the flat filter screen 6-1 and the hemispherical filter screen 6-2 are in the air. Under the action of centrifugal force and gravity, it falls to the bottom of the dust removal chamber 5. When the dust particles falling to the bottom of the dust removal chamber 5 accumulate to a certain amount, under the action of gravity, it gradually slides along the chamber wall to the dust discharge groove 7 in the center. , and finally discharged from the dust outlet 8 along the dust discharge groove 7;

d. The dust-laden air flow filtered by the polygonal mesh surface filter cartridge 6 enters the outlet chamber 9 from the outlet of the polygon filter cartridge 6, and the outlet filter screen 9-1 arranged at the rear of the outlet chamber will filter excess moisture and more in the dust-laden air flow The fine dust particles are intercepted and left on the net, and finally the clean air that has eliminated the dust particles is transported from the outlet chamber 9 to the roadway.

Example 1:

When the device is in operation, first move the dust removal device to a suitable position, connect the air-inducing part and the dust removal part through the buckle 12, adjust the height and angle of the device by adjusting the height adjustment button 11 on the mobile bracket 10, and turn the air pressure pipe The rubber hose 13 drawn from the water supply line is connected to the flow valve 14 and the pressure flow meter 15 respectively, and the end is connected with the pressure air inlet 1-1 and the air inlet 2-1 with screws. Similarly, the rubber hose 13 drawn from the water supply pipeline is connected to the flow valve 14 is connected with the pressure flow meter 15, and the end is also connected with the water inlet 4-1 of the dry mist nozzle 4 by screws;

Open the flow valve 14 on the rubber hose 13 connecting the pressure air pipeline and the water supply pipeline, the air flow enters the injection chamber 1-2 through the ejector pressure inlet 1-1, and the pressure inlet 1-1 is provided with a nozzle, and the nozzle accelerates The speed at which the airflow enters the ejection chamber 1-2 forms a negative pressure in the ejection chamber 1-2, and the negative pressure of the ejection chamber 1-2 drives the dusty airflow outside the trumpet-shaped air inlet into the ejection chamber 1-2, and The trumpet-shaped inlet of the air port 1-3 and the elbow setting can reduce the wind resistance of the external dust-laden airflow entering the ejection chamber 1-2, and introduce more dust-laden air. Enter the reducer together under entrainment, the flow velocity of the mixed fluid increases, and a full exchange of velocity and energy occurs when entering the mixing chamber 1-5, and finally the mixed fluid with a large amount of dust-laden gas passes through the diffusion port with a gradually increasing cross-section 1-6 spraying, the enlargement of the cross-section of the diffusion port 1-6 can make more dust-laden air quickly spray into the mixing cylinder and the dust removal chamber.

At the lower part of the ejector, the entry of the airflow drives the blades of the pneumatic fan 2 to rotate. The pneumatic fan 2 sucks a large amount of dusty airflow from the outside into the mixing cylinder 3. The water flow at the water inlet 4-1 on the side of the nozzle 4 is fully mixed, the flow velocity of the mixed fluid is increased, and the pressure is increased, and finally a dry fog of <10 μm is formed at the nozzle outlet. The angle of the dry fog nozzle 4 is 60°, and the range is 2m. A fog curtain is formed inside the cylinder 3, which plays a role in reducing dust on the incoming dust-laden airflow. The mixed gas entering the dust removal chamber from the ejector and the pneumatic fan drives the polygonal mesh filter cartridge 6 to rotate through the rotating blades 6-6 on the polygonal mesh filter cartridge 6, and the larger dust particles fall to the dust collector under the action of mist adsorption. At the bottom of the chamber, the dust particles that have not landed are attached and intercepted on the plane filter cartridge net 6-1 and the hemispherical filter net 6-2. The dust particles on 6-2 fall to the bottom of the dust removal chamber under the action of centrifugal force and their own gravity. When the dust particles accumulate to a certain extent, they gradually slide down into the dust discharge groove 7, and along the dust discharge groove from the dust outlet 8 discharge. The dusty air is filtered by the polygonal mesh filter cartridge 6 to become clean air, the clean air enters the polygonal mesh filter cartridge 6, passes through the outlet of the polygonal mesh filter cartridge 6, and the clean air enters the outlet chamber 9 and passes through the outlet screen 9 -1 Intercept excess moisture and dust particles with smaller particle sizes, discharge clean air with suitable humidity, and complete dust removal again.

Claims (8)

1. A coal mine underground dedusting device is characterized in that: it comprises an air induction part, a dust removal part and an outlet part, the air induction part is arranged at the front end of the dust removal part, and the outlet part is arranged at the rear end of the dust removal part, wherein the dust removal part and the outlet part are connected As a whole, a mobile bracket (10) is provided under the air induction part and the dust removal part; The air induction part includes: horizontally arranged ejector (1), pneumatic fan (2), mixing cylinder (3) and dry fog nozzle (4), wherein the ejector (1) and pneumatic fan (2) are arranged side by side Setting, the ejector (1) and the pneumatic fan (2) are respectively connected to the front end of the mixing cylinder (3), and the rear end of the mixing cylinder (3) is connected to the dust removal part; the ejector (1) includes the ejection chamber (1 -2), the front end of the ejection chamber (1-2) is provided with a pressurized air inlet (1-1), and the ejection chamber (1-2) is provided with a trumpet-shaped opening air inlet in the same direction as the pneumatic fan (2) ( 1-3), the back of the injection chamber (1-2) is connected to the mixing chamber (1-5) through the reducer (1-4), and the rear end of the mixing chamber (1-5) is provided with a diffusion port with a gradually expanding radius (1-6), the diffusion port (1-6) is set in the mixing cylinder (3); the pneumatic fan (2) includes fan blades and a fan frame, and the fan frame is equipped with a dry fog nozzle (4). The air outlet of the pneumatic fan (2-2) and the water inlet (4-1) are arranged on the fog nozzle (4), and the air inlet connected with the rubber hose (13) drawn out from the pressure air pipeline is arranged under the air fan (2) (2-1); The dust removal part includes: a dust removal chamber (5), a polygonal mesh filter cartridge (6), a dust discharge tank (7), and a dust outlet (8); the dust removal chamber (5) is a cylindrical hollow cylinder structure, and the dust removal chamber The head of (5) is matched and connected with the mixing cylinder (3), the tail of the dust removal chamber (5) is connected with the outlet part, and there is an oblique dust discharge groove (7) under the dust removal chamber (5), and the dust discharge groove ( 7) There is a dust outlet (8) at the bottom, the polygonal mesh filter cartridge (6) is set in the dust removal chamber (5), and the tail of the polygonal mesh filter cartridge (6) is connected to the outlet part; The outlet part includes: an outlet chamber (9) and an outlet screen (9-1); the outlet chamber (9) is a trumpet structure with a small front and a large rear, and the front end of the outlet chamber (9) is connected to the polygonal mesh surface filter cartridge (6) The tails are connected, which is the airflow outlet of the polygonal mesh surface filter cartridge (6), and the outlet screen (9-1) is set on the outlet chamber (9); The mobile support (10) is provided with a height adjustment button (11) for adjusting the height of the mobile support (10). 2. The coal mine underground dust removal device according to claim 1, characterized in that: the polygonal mesh filter cartridge (6) includes a flat filter (6-1), a hemispherical filter (6-2), a filter shaft (6-3), support shaft sleeve (6-4), support rod (6-5), rotating blade (6-6), filter grid (6-7); wherein the filter cartridge shaft (6-3) passes Multiple shaft support rods (5-1) are fixed on the outlet wall of the dust removal chamber, the flat filter screen (6-1) is fixed on the support shaft sleeve (6-4) through the support rods (6-5), and the filter cartridge shaft ( 6-3) and a plurality of support rods (6-5) are provided with a support shaft sleeve (6-4), and a plurality of The filter grid (6-7), the flat filter screen (6-1) has a hemispherical filter screen (6-2) at the head, and the polygonal mesh surface filter cartridge (6) is the outlet of the dust removal chamber (5) at the end, and the filter cartridge (6) There is no filter at the rear of the outlet. 3. The coal mine underground dust removal device according to claim 2, characterized in that: the surface of the filter screen (6-1) of the polygonal mesh surface filter cartridge (6) is wrinkled and undulating, and the plane filter screen (6-1) and the front part The hemispherical filter (6-2) is connected by welding. The mesh size and number of filter layers of the entire flat filter (6-1) and hemispherical filter (6-2) are determined comprehensively according to dust removal requirements and air volume. The outer surface of the plane filter (6-1) is obliquely provided with a plurality of rotating blades (6-6), and the plurality of rotating blades (6-6) are arranged at intervals of 90 degrees around the axis of the filter cartridge (6-3). There are 3 rows on the surface, and there are 12 rotating blades (6-6) in total. Under the action of airflow, multiple rotating blades (6-6) will drive the entire polygonal mesh filter cartridge (6) around the filter cartridge (6-3) Axis rotation. 4. The coal mine underground dust removal device according to claim 1, characterized in that: the air inlet (2-1) and the compressed air inlet (1-1) are connected to the compressed air pipeline with a rubber hose (13), and the water supply pipeline is also connected The water inlet (4-1) of the dry fog nozzle (4) is also connected with a rubber hose (13). The rubber hose (13) is provided with a regulating valve (14) and a pressure flow meter (15). The pressure flow meter (15) can be Instantly display the flow and pressure of the rubber hose, and control the pressure and flow of gas and water flowing into the device by adjusting the regulating valve (14). 5. The coal mine underground dust removal device according to claim 1, characterized in that: the pneumatic fan (2) is welded to the mixing cylinder (3), and the mixing cylinder (3) and the pneumatic fan (2) are welded on the mobile bracket (10 ), the height adjustment button (11) on the mobile bracket (10) is adjusted by perforation, and the legs of the mobile bracket (10) have circular holes with equal diameters at intervals of a certain height. By adjusting the circular holes at different positions, they are aligned and inserted button to adjust the height. 6. The coal mine underground dust removal device according to claim 1, characterized in that: the bottom of the dust removal chamber (5) is a dust discharge trough (7) inclined downwards, and the depth and inclination angle of the dust discharge trough (7) can slide down according to the dust particles The difficulty is determined. The port of the dust discharge chute (7) is the dust outlet (8). When the amount of dust accumulates to a certain extent, it can freely slide out along the dust discharge chute (7). 7. The coal mine underground dust removal device according to claim 1, characterized in that: the air induction part and the dust removal part are connected by a buckle (12), the front end of the buckle (12) is a mixing cylinder (3), and the buckle (12) The rear part is the inlet of dust removal chamber (5). 8. A dust removal method using the coal mine underground dust removal device according to claim 1, characterized in that the steps are as follows: a. First, connect the air induction part and the dust removal part of the dust removal device through the buckle (12), and connect the two rubber hoses (13) leading out from the pressure air pipeline to the air inlet (2-1) and the pressure air inlet ( 1-1) After the threaded connection, connect the rubber hose (13) leading out of the underground water supply pipeline to the water inlet (4-1) of the dry fog nozzle through the threaded connection; b. Adjust the regulating valve (14) on each rubber hose (13) to adjust the pressure of the air flow and water flow. (1-2) Negative pressure is formed, and the negative pressure of the injection chamber brings the dusty air outside the trumpet-shaped air introduction port (1-3) into the injection chamber (1-2), passing through and from the compressed air inlet (1- 1) The incoming compressed air flow is further accelerated in the reducer (1-4), and then enters the mixing chamber (1-5) to fully mix the dusty air with the compressed air flow, and finally sprays out from the diffuser port (1-6) into the mixing cylinder (3); the airflow enters the pneumatic fan (2) to drive the fan blades to rotate, and the dusty gas is sucked into the dust collector, and the airflow passes through the fan and enters the dry fog nozzle (4) from the airflow outlet (2-2). The water flow entering from the water flow inlet (4-1) of the dry fog nozzle (4) is mixed to form a spray, and the spray is sprayed into the mixing cylinder (3) and the dust removal chamber (5), and the suction from the ejector (1) and the pneumatic fan (2) Inhaled dust-laden gas absorbs dust; c. The inhaled dust-laden airflow enters the dust removal chamber (5) through the mixing cylinder (3), and the dust particles with a particle size > 30 μm fall freely under the action of the spray and fall to the bottom of the dust removal chamber (5) or adhere to the polygonal mesh surface On the flat filter screen (6-1) and the hemispherical filter screen (6-2) of the filter cartridge (6), the dust particles with a particle size of ≤30 μm are attached and intercepted on the flat filter screen (6-1) and the hemispherical filter screen (6-2) of the filter cartridge On the hemispherical filter (6-2), at the same time, the rotating blades (6-6) on the outer surface of the polygonal mesh filter cartridge (6) drive the polygonal mesh filter cartridge (6) to rotate under the push of the dust-laden air flow, and the polygonal mesh filter cartridge (6) rotates. When the surface filter cartridge (6) rotates, the dust particles that are intercepted and attached to the flat filter screen (6-1) and the hemispherical filter screen (6-2) fall to the dust removal chamber (5) under the action of centrifugal force and gravity At the bottom, when the accumulation of dust particles falling to the bottom of the dust removal chamber (5) reaches a certain amount, under the action of gravity, it will gradually slide to the dust discharge groove (7) in the center, and finally along the dust discharge groove (7) from the Dust outlet (8) discharges; d. The dust-laden air flow filtered by the polygonal mesh filter cartridge (6) enters the outlet chamber (9) from the outlet of the polygonal mesh filter cartridge (6), and the mouth filter (9-1) installed at the rear of the outlet chamber will filter Excess moisture and finer dust particles in the final dust-laden air flow are intercepted and left on the net, and finally the clean air that eliminates dust particles is transported from the outlet chamber (9) to the roadway.