CN107218074A - Excavation face in coal mine dust pelletizing system - Google Patents

Abstract

The invention discloses a dust removal system for fully mechanized excavation working faces in coal mines, comprising: a dust control system arranged on one side of a roadheader, the dust control system comprising a press-in fan, a press-in air cylinder and a wall-attached air cylinder connected in sequence; Dust suction system, the dust suction system includes the first dust suction hood and the second dust suction hood for respectively sucking the dust at the position of the cutting head of the roadheader, at the position of the shovel plate, and at the transfer point of the scraper conveyor and the belt conveyor and the third dust collection hood, dust collection air cylinder, and dust collection hood assembly box, the first dust collection hood, the second dust collection hood, the third dust collection hood and the dust collection air cylinder are all connected with the dust collection hood assembly box; The dust collection system on the other side of the roadheader includes a draw-out air duct, a dust collector and a draw-out fan connected in sequence, and the draw-out air duct is connected with the dust collection hood assembly box. The coal mine fully mechanized excavation working face dust removal system can effectively control the diffusion of dust in the underground roadway, has good dust absorption effect and high dust collection efficiency, and can greatly reduce the coal mine fully mechanized excavation flour dust concentration.

Description

Coal mine fully mechanized excavation working face dust removal system

technical field

The invention relates to the technical field of dust removal in coal mines, in particular to a dust removal system for fully mechanized excavation working faces in coal mines.

Background technique

Fully mechanized excavation working face is one of the main dust-producing points in coal mines. With the continuous improvement of coal mining mechanization and the widespread use of high-efficiency and high-power roadheaders, the mine mining intensity is increasing, and the dust in fully mechanized excavation working face The sharp increase in production has seriously affected the health of workers and threatened the safe production of mines. The coal seam occurrence conditions in my country are complex and the production process is very different. Especially in the underground fully mechanized excavation working face, there are problems such as large dust generation, high concentration, and difficult ventilation. A large amount of dust is suspended in the air, which not only reduces the visibility of the working face, It has a great impact on the normal excavation of the roadway and poses a serious hazard to the health of the operators. Therefore, effective control of the dust in the fully mechanized excavation face has very important practical significance for ensuring the physical and mental health of underground operators.

Just using general dust removal measures cannot fundamentally solve the current situation of dust in fully mechanized excavation face. The dust curtain, net-enclosed dust removal process and air curtain closed-type dust removal process can control the dust on the fully mechanized excavation face in front of the driver of the roadheader, and prevent the dust from spreading to the back of the roadway. However, the application of dust curtain and net-enclosed dust removal technology will affect the roadheader driver's sight and operation of the roadheader, and the air-curtain closed dust removal process will also bring noise pollution and affect the operation of the roadheader. At the position of the mining face, the wind blows directly to the fully mechanized excavation face of the coal mine, and a lot of dust cannot be sucked away by the dust removal fan. In addition, the coal mine mechanized excavation produces a large amount of dust, high concentration, high dispersion, and the ventilation is difficult. The distribution of dust sources at dust production points is not concentrated, and traditional dust collection methods cannot effectively collect dust, and the dust removal effect is poor.

Contents of the invention

The purpose of the present invention is to provide a dust removal system for fully mechanized coal mine excavation working face, to solve the problems in the prior art mentioned above, to effectively control the diffusion of dust in the underground roadway, with good dust absorption effect and high dust collection efficiency, which can greatly reduce coal mine dust collection. Comprehensive excavation work flour dust concentration.

To achieve the above object, the present invention provides the following scheme:

The invention provides a coal mine fully mechanized excavation working face dust removal system, comprising:

A dust control system, the dust control system is arranged on one side of the roadheader, and the dust control system includes a press-in fan, a press-in air cylinder and a wall-attached air cylinder connected in sequence;

A dust suction system, the dust suction system includes a first dust suction hood, a second dust suction hood, a third dust suction hood, a dust suction air cylinder and a dust suction hood assembly box, the first dust suction hood, the second dust suction The dust cover and the third dust cover are respectively used to absorb the dust at the position of the cutting head of the roadheader, the position of the shovel of the roadheader and the transfer point of the scraper conveyor and the belt conveyor. The first dust cover, the Both the second dust collection hood and the third dust collection hood are connected to the dust collection hood assembly box through an air duct, and the dust collection air cylinder is connected to the dust collection hood assembly box;

And a dust collection system, the dust collection system is arranged on the other side of the roadheader, the dust collection system includes a draw-out air cylinder, a dust collector and a draw-out fan connected in sequence, and the draw-out air cylinder and the suction The dust cover assembly box is connected.

Preferably, the wall-attached air duct includes a cylinder body and a plurality of air guide pipes arranged on the side wall of the cylinder body, each of the air guide pipes is arranged in a spiral shape along the outer side wall of the cylinder body, each The air guide pipe is provided with an air guide pipe air inlet and an air guide pipe air outlet, and the air guide pipe air inlet passes through the cylinder wall of the cylinder body.

Preferably, the air inlet end and the air outlet end of the cylinder are respectively connected with an air duct reducing diameter and a conical air duct, and the conical air duct, the air duct reducing diameter and the cylinder body are all detachable connect.

Preferably, the dust suction ports of the first dust collection hood, the second dust collection hood and the third dust collection hood are provided with mesh iron wires, and the dust suction hood assembly box is provided with The air duct of the first dust collection hood, the air duct of the second dust collection hood, the air duct of the third dust collection hood and the air inlet of the box connected to the dust suction air cylinder, each of the boxes A deflector is arranged in the air inlet of the body.

Preferably, the dust collector includes a self-excited water bath dedusting part, a packing dedusting part and a wet vibrating wire grid dedusting part connected in sequence, the self-excited water bath dedusting part is used to collect large particle dust, and the packing dedusting part It is used to capture small particle dust, and the dust removal part of the wet vibrating wire grid is used to capture respirable dust.

Preferably, the self-excited water bath dedusting part includes an air inlet chamber, a dust removal funnel, an S-shaped blade, an overflow water tank and an aerosol chamber, and the air inlet chamber is provided with an air inlet connected to the extraction air cylinder , the air inlet chamber and the aerosol chamber are arranged adjacent to and side by side above the dust removal funnel, and both the air inlet chamber and the aerosol chamber communicate with the dust removal funnel; the S-shaped blades are arranged horizontally on Between the air inlet chamber and the aerosol chamber and above the dust removal funnel, the S-shaped blade includes an upper blade and a lower blade, and a clean room is formed between the upper blade and the lower blade; The bottom of the dust removal funnel is connected with the first slurry discharge pipe through the first valve, and the side wall of the dust removal funnel is connected with the first water supply pipe through the second valve; the overflow water tank is arranged on the outside of the dust removal funnel and is connected with the overflow opening The dust removal funnel is connected, the upper part of the overflow water tank is provided with a ventilating chamber connecting the overflow water tank and the aerosol chamber, and the bottom of the overflow water tank is connected with a second slurry discharge pipe through a third valve. The side wall of the overflow water tank is connected with the second water supply pipe through the fourth valve, and a water level monitor is arranged in the overflow water tank.

Preferably, the dust removal funnel is an adjustable funnel, the air intake chamber is an adjustable air intake chamber, the dust removal funnel includes a cone fixed side wall and a cone adjustment side wall connected at both ends, the air intake The chamber includes a cylinder fixed side wall and a cylinder adjustment side wall connected at both ends, the upper end of the cone adjustment side wall is connected with the lower end of the cylinder adjustment side wall, the cone adjustment side wall and the cylinder adjustment side wall The cylinder adjustment side wall is an extendable side wall, and the cone adjustment side wall is connected with an adjustment handle through a support.

Preferably, the filler dedusting part includes a filler chamber, a filler layer, an upper sieve plate for filler, and a lower sieve plate for filler, the filler chamber communicates with the aerosol chamber, and the upper sieve plate for filler and the lower sieve plate for filler respectively arranged at the upper and lower ends of the packing chamber, the packing layer is arranged between the upper sieve plate of the packing and the lower sieve plate of the packing, the upper sieve plate of the packing is provided with a first nozzle, and the second One nozzle is a high-pressure spray nozzle, and the first nozzle is connected with a first automatic spray system.

Preferably, the wet-type vibrating wire grid dedusting part includes a jet chamber, a vibrating wire grid and a vibrating wire grid pipeline, the jet chamber includes a gas inlet chamber and an ejector, and the ejector includes a venturi tube and is arranged on the The second nozzle in the Venturi tube. The Venturi tube includes a sequentially connected and integrally formed suction chamber, a throat and a diffuser tube. One end of the gas inlet chamber is connected to the upper end of the packing chamber, and the gas inlet chamber The other end is connected with the suction chamber, the diffusion pipe is connected with the vibrating wire grid pipeline, the second nozzle is connected with a second automatic spraying system, the vibrating wire grid pipeline is connected with the diffuser pipe One end of the connection is provided with multiple layers of the vibrating wire grids, and the vibrating wires of the vibrating wire grids arranged adjacent to each other are perpendicular to each other.

Preferably, along the wind flow direction, the vibrating wire grid pipeline is provided with a dust removal bucket and a demist bucket in sequence from front to back under the vibrating wire grid; The connection position of the type fan is provided with a fan drain pipe.

Compared with the prior art, the present invention has achieved the following technical effects:

The local ventilation mode of the dust removal system of the coal mine fully mechanized excavation working face provided by the present invention is long-pressure and short-pump ventilation, mainly press-in ventilation, and adopts the ventilation matching method of installing a wall-attached air duct at the air outlet of the press-in air duct. Install dust collection hoods at each dust production point, use the dust collection hood assembly box to assemble each dust collection hood, dust collection air cylinder and draw-out air cylinder, and adopt the method of matching the wall-attached air cylinder with the dust collector, and draw-out ventilation Equipped with a dust collector for dust removal, it is a closed dust removal system integrating dust control, dust suction and dust collection. It effectively controls the spread of dust in the underground roadway from the three aspects of dust control, dust suction and dust collection, and greatly improves the dust absorption. Dust and dust collection efficiency greatly reduced the dust concentration of working flour, received a better dust reduction effect, and eliminated potential safety hazards in the working process; The possibility of workers suffering from pneumoconiosis is also greatly reduced, and the service life and accuracy of instruments and equipment are improved.

The air flow generated by the press-in fan enters the press-in air cylinder, and a flexible wall-attached air cylinder is installed at the air outlet of the press-in air cylinder, and part of the air flow of the press-in air cylinder is blown from the cone air cylinder to the working surface in the form of a jet , the other part of the air flow is blown forward through the strip-shaped air duct spirally, which reduces the wind speed at the air outlet at the end of the wall-attached air duct without changing the original air volume of the excavation working face, and slows down the direction of dust generated when the roadheader is working. The speed of diffusion at the back of the roadway makes a large amount of dust accumulate in front of the driver of the roadheader; at the same time, the air flow from the strip-shaped air duct of the wall-attached fan cylinder forms a spiral air flow with a certain kinetic energy along the roadway wall, resulting in a good wall-mounted effect , to suppress dust flying. The kinetic energy of this spiral air flow is greatly increased under the joint action of the axial velocity generated by the dust-laden air inhaled by the suction port of the dust suction duct, so that an air curtain can be established in front of the driver's work area of the roadheader to prevent the dust from spreading outward. , Effectively seal the dust generated when the roadheader is working, prevent the dust from spreading outward, and provide a clean air environment for the driver of the underground roadheader.

Under the action of the pull-out fan, the dust-absorbing air cylinder inserted into the air curtain can suck the dust-laden air flow into the dust collector, and at the same time, the first dust-absorbing hood, the second dust-absorbing hood, and the third dust-absorbing hood directly cut the roadheader The dust is sucked into the dust collector at the main dust-producing points of the fully mechanized excavation working face, such as the transfer point of the shovel and scraper conveyor and the belt conveyor, which greatly improves the dust collection efficiency of the fully mechanized excavation working face.

The dust-laden air flow enters the dust collector, and the dust removal process is sequentially purified from coarse particles, fine particles to fine particles, including multi-stage dust removal: the first-stage dust removal is a self-excited water bath dust removal part, which uses gravity mechanism, inertia mechanism, and centrifugal mechanism to carry out large-particle dust. Capture; the secondary dust removal is the filler dust removal part, which captures smaller particles of dust by water bath mechanism and spray mechanism; the third stage dust removal is the high-efficiency dust removal part of the wet vibrating wire grid, which captures respirable dust by the high-efficiency dust removal mechanism of the vibrating wire grid. The dust collector is not easy to block, easy to clean, has the advantages of stable operation, high dust removal efficiency, large processing air volume, and convenient maintenance.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the structure schematic diagram of the dust removal system of the coal mine fully mechanized excavation working face of the present invention

Fig. 2 is a front structural diagram of the wall-attached air duct of the dust removal system of the fully mechanized driving face of the coal mine according to the present invention.

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is a structural schematic diagram of the first dust collection hood of the coal mine fully mechanized excavation face dust removal system of the present invention;

Fig. 5 is a schematic structural view of the second dust collection hood of the coal mine fully mechanized excavation face dust removal system of the present invention;

Fig. 6 is a schematic structural view of the third dust collection hood of the coal mine fully mechanized excavation face dust removal system of the present invention;

Fig. 7 is a schematic structural view of the dust collection cover assembly box of the dust removal system of the coal mine fully mechanized excavation working face of the present invention;

Fig. 8 is a schematic structural view of the deflector of the dust removal system of the coal mine fully mechanized excavation face of the present invention;

Fig. 9 is a structural schematic diagram of the dust collector of the dust removal system of the coal mine fully mechanized excavation working face of the present invention;

Fig. 10 is a schematic structural view of the jet device of the dust remover of the coal mine fully mechanized excavation working face dust removal system of the present invention;

Fig. 11a is a schematic diagram of the shape and size (mm) of the blade on the S-shaped blade of the dust remover of the coal mine fully mechanized excavation face dust removal system of the present invention;

Figure 11b is a schematic diagram of the shape and size (mm) of the lower blade of the S-shaped blade of the dust collector of the dust removal system of the coal mine fully mechanized excavation working face of the present invention;

Figure 11c is a schematic diagram of the combination of S-shaped blades of the dust collector of the dust removal system of the coal mine fully mechanized excavation working face of the present invention;

Fig. 12 is a structural schematic diagram of the vibrating wire grid of the dust collector of the dust removal system of the coal mine fully mechanized excavation face of the present invention;

Fig. 13 is a structural schematic diagram of the fan drainage pipe of the dust removal system of the coal mine fully mechanized excavation face of the present invention.

In the figure: 1-press-in fan; 2-press-in fan; 3-wall fan; 31-conical fan; Variable diameter; 35-air inlet of air guide pipe; 36-cylinder body; 4-driver's position; 5-cutting head of roadheader; 6-shovel of roadheader; The first dust collection hood; 9-the second dust collection hood; 10-the third dust collection hood; 101-dust curtain; 11-dust suction air cylinder; 12-dust collection hood assembly box; 13-draw-out air duct; 14-dust collector; 141-first water supply pipe; 142-inlet chamber; 1421-air inlet; 143-dust funnel; 1431-adjusting handle; A row of slurry pipes; 144-S-type blades; 1441-upper blades; 1442-lower blades; 145-overflow water tank; 1451-overflow opening; 1452-second row of slurry pipes; Water level monitor; 1455-ventilation chamber; 146-aerosol chamber; 147-filling chamber; 1471-filling lower sieve plate; 1472-filling upper sieve plate; 149-jet; 1491-venturi; 14911-suction chamber; 14912-throat; 14913-diffusion; 1492-second nozzle; 1410-vibrating wire grid; Bucket; 1413-vibrating wire grid pipeline; 1414-fan drainage pipe; 14141-dust collector inner cylinder, 14142-fan outer cylinder, 14143-fan drainage pipe drainage; 15-drawing fan.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The purpose of the present invention is to provide a dust removal system for fully mechanized excavation working face in coal mine to solve the problems in the prior art mentioned above. Flour dust concentration in fully mechanized excavation in coal mines.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention provides a dust removal system for fully mechanized excavation working face in coal mine, as shown in Fig. 1, it includes a dust control system, a dust suction system and a dust collection system. The built-in fan 1, the press-in type air cylinder 2 and the wall-attached air cylinder 3; the dust collection system includes the first dust collection hood 8, the second dust collection The dust cover assembly box 12, the first dust suction cover 8, the second dust suction cover 9 and the third dust suction cover 10 are respectively used to absorb the position of the cutting head 5 of the roadheader, the position of the blade 6 of the roadheader and the scraper conveyor With the dust at the transfer point 7 of the belt conveyor, the first dust collection hood 8, the second dust collection hood 9 and the third dust collection hood 10 are all connected to the dust collection hood assembly box 12 through a telescopic air duct, and the dust suction wind The cylinder 11 is connected with the dust collection hood assembly box 12; the dust collection system is arranged on the other side of the roadheader, and the dust collection system includes a draw-out air cylinder 13, a dust collector 14 and a draw-out fan 15 connected in sequence, and the draw-out air cylinder 13 Connect with the dust collection hood assembly box 12.

With the above-mentioned structure, the local ventilation mode of the coal mine fully mechanized excavation working face dust removal system provided by the present invention chooses long pressure and short suction ventilation, mainly press-in ventilation, and adopts press-in air duct 2 and installs wall-attached air duct 3 at the air outlet The matching ventilation method is to install dust collection hoods at each dust production point, and use the dust collection hood assembly box to assemble each dust collection hood and dust collector fan cylinder. Ventilation is equipped with a dust collector for dust removal. It is a closed dust removal system integrating dust control, dust collection and dust collection. It effectively controls the spread of dust in the underground roadway from the three aspects of dust control, dust collection and dust collection, and greatly improves the quality of life. The efficiency of dust suction and dust collection has greatly reduced the dust concentration of working flour, received a good dust reduction effect, and eliminated potential safety hazards in the working process; improved the working environment of the fully mechanized excavation face in coal mines, increased work efficiency, and reduced The possibility of underground workers suffering from pneumoconiosis is also greatly reduced, and the service life and accuracy of instruments and equipment are improved.

In the specific plan, the distance between the press-in fan 1 and the tunneling roadway is set at 15-20m, the press-in fan 2 is a strong colloidal flame-retardant fan with a diameter of 800mm, and each fan port adopts double reverse pressure edge , straight hanging, must be hung on every ring; the mouth of the press-in air cylinder 2 is at a certain distance behind the transfer point 7 of the scraper conveyor and the belt conveyor, and the distance from the head-on face of the excavation is set to 10-15m. 2. The length of the overlapped section with the draw-out fan 13 is set to 10-20m; the press-in air volume of the push-in fan 1 is greater than the exhaust air volume of the draw-out fan 15, so as to ensure that there is wind flow in the overlap section and no circulating air is generated in this section. The relationship between the air volume Q _pressure of the push-in air duct 2 and the air suction volume Q _suction of the dust collector 14 is Q _pressure = (1.2～1.3) Q _suction .

As a preferred embodiment, as shown in Fig. 2 and Fig. 3, the above-mentioned wall-mounted air duct 3 of the coal mine fully mechanized excavation working face dust removal system provided by the present invention includes a cylinder 36 and a plurality of cylinders arranged on the side wall of the cylinder 36. Air guide pipe 32, the air guide pipe 32 is a strip air guide pipe, the air guide pipe 32 is helically arranged along the outer wall of the cylinder body 36, and the air guide pipe 32 is provided with an air guide pipe air inlet 35 and an air guide pipe outlet. The tuyere 33 and the air inlet 35 of the air guide pipe penetrate the cylinder wall of the cylinder 36 .

The wall-mounted air duct 3 in the present invention can change the air flow direction of the press-in air duct. Part of the axial air flow in the press-in air duct 2 is blown from the conical air duct 31 to the working surface in the form of a jet, and the other part passes through The strip-shaped air guide pipe 32 is blown out in a forward spiral, forming a Coanda effect, forming a rotating air curtain in front of the driver's position, preventing the wind from blowing directly to the working surface and forming an air curtain and dust-proof area in front of the driver's position of the fully mechanized excavator. Preventing the dust from spreading to the back of the roadway not only has a good dust control effect, but also helps to disperse local gas.

In a further solution, as shown in Figure 2, the air inlet end and the air outlet end of the cylinder 36 are respectively connected with an air cylinder reducing diameter 34 and a conical air cylinder 31, and the conical air cylinder 31 and the air cylinder reducing diameter 34 are connected to the air cylinder. The body 36 is detachably connected; the wall-attached air duct 3 is installed directly on the air outlet of the press-in air duct 2 through the air duct variable diameter 34, and the air volume distribution can be adjusted by adjusting the diameter of the air outlet of the conical air duct 31. In this way, the air volume distribution can be adjusted according to actual needs.

In the specific scheme, the wall-mounted air duct 3 is a flexible wall-attached air duct with a diameter of 800mm (the specific manufacturing size needs to be determined according to the actual situation of the application site), and the air guide pipe 32 is a flexible air guide pipe and extends along the direction of the helix. The front is opened to form a slit-shaped air flow outlet, and the slit length is 2000mm.

As a preferred embodiment, as shown in Figures 4 to 8, the suction of the first dust collection hood 8, the second dust collection hood 9 and the third dust collection hood 10 of the coal mine fully mechanized excavation face dust removal system provided by the present invention The dust outlet is provided with mesh iron wire, and the dust collection hood assembly box is provided with the air duct of the first dust collection hood 8, the air duct of the second dust collection hood 9, the air duct of the third dust collection hood 10 and the suction The air inlets 121 of the cabinets connected to the dust blower 11 are provided with deflectors in each of the air inlets 121 of the cabinets.

In the specific scheme, the first dust collection cover 8 is arranged on the side of the roadheader cutting head 5 (cutting mechanism) close to the draw-out air cylinder 15, installed on the cantilever of the roadheader, and in the center of the first dust collection cover 8 The air duct of position will be suitably lower than the cutting arm of roadheader, and the 8 cover openings of the first dust suction cover are vertically arranged with the cutting head of roadheader, and are connected with dust suction cover assembly box 12 by telescopic air pipe; The dust cover 9 is arranged on the side of the roadheader shovel 6 (reproduced mechanism) close to the dust collection system, and the second dust collection cover 9 is arranged in parallel with the roadhead shovel 6, and is assembled with the dust collection box 12 through the telescopic air duct. connected; the third dust collection hood 10 is arranged on the upper part of the transfer point 7 (turning mechanism) of the scraper conveyor and the belt conveyor, and is connected with the dust collection hood assembly box 12 through a telescopic air duct; the dust collection air cylinder 11 is connected to the suction The dust cover assembly box 12, the dust collection cover assembly box 12 is connected with the draw-out air cylinder 13.

In a more specific solution, the first dust collection hood 8 is a rectangular dust collection hood with sides, 0.4m wide, 0.8m long, the control wind speed V _c =2m/s, and 0.2m away from the head of the excavation; the second dust collection hood 9 is There is a rectangular suction hood with sides, 0.3m wide, 0.6m long, 0.2m away from the dust source, and the control wind speed V _c =1.5m/s; the third dust suction hood 10 is a semi-closed dust suction hood with a width of 0.7m at the opening, The length is 0.7m, the cross-sectional area of the opening of the dust collection hood is A=0.49m ² , and a specially designed dust-proof curtain 101 is installed to form a semi-closed space, and the wind speed is controlled V _c =1.0m/s; the dust collection hood assembly box 12 is connected with each suction A deflector is arranged at the air inlet 121 of the box where the air duct of the dust cover is connected with the dust suction cylinder 11, and the air volume distribution of each air duct and the dust suction cylinder 11 can be adjusted by adjusting the air outlet area of the deflector, which can realize The multi-level and multi-stage adjustment of the air suction volume can control the dust collection direction and wind speed at any time; the mesh iron wires arranged at the suction ports of each dust collection hood can prevent massive dust particles from entering the dust collection hood 12 along the hood mouth, avoiding dust collection , The device is blocked during the dust collection process, and the waste of resources is also avoided.

As a preferred embodiment, as shown in Figure 1 and Figure 9, the dust collector of the coal mine fully mechanized excavation face dust removal system provided by the present invention is a high-efficiency composite wet type that integrates a water bath, fillers, jets, and vibrating wire grids. The dust collector includes a self-excited water bath dust removal part, a packing dust removal part and a wet vibrating wire grid dust removal part connected in sequence.

The above-mentioned dust collector includes multi-stage dust removal, and the dust removal process is sequentially purified from coarse particles, fine particles to fine particles: the first-stage dust removal is a self-excited water bath dust removal part, which uses gravity mechanism, inertia mechanism, and centrifugal mechanism to capture large particle dust; The second-level dust removal is the dust removal part of the filler, which collects small particle dust by the water bath mechanism and the spray mechanism; the third-level dust removal is the high-efficiency dust removal part of the wet vibrating wire grid, and the respirable dust is captured by the high-efficiency dust removal mechanism of the vibrating wire grid. With this structure, the dust removal efficiency can reach more than 98.6% without increasing the space occupied by the dust removal system. space, special technical conditions, and cost requirements; the dust collector of the dust removal system for fully mechanized coal mine excavation face provided by the invention is not easy to block, easy to clean, stable in operation, high in dust removal efficiency, large in air volume, and convenient in maintenance, etc. advantage.

In the specific scheme, the self-excited water bath dedusting part includes an air inlet chamber 142, a dust removal funnel 143, an S-shaped blade 144, an overflow water tank 145, and an aerosol chamber 146. The air inlet 1421, the air inlet chamber 142 and the aerosol chamber 146 are arranged side by side above the dust removal funnel 143, and both the air inlet chamber 142 and the aerosol chamber 146 communicate with the dust removal funnel 143, and the S-shaped blades 144 are installed horizontally between the air inlet chamber 142 and the air inlet chamber 142. Between the mist chambers 146 and above the dust removal funnel 143, the S-shaped blade 144 includes an upper blade 1441 and a lower blade 1442, as shown in Figures 11a to 11c, a clean room is formed between the upper blade 1441 and the lower blade 1442; the bottom of the dust removal funnel 143 The first slurry discharge pipe 1433 is connected through the first valve, and the side wall of the dust removal funnel 143 is connected with the first water supply pipe 141 through the second valve. Connected, the upper part of the overflow water tank 145 is provided with a ventilation chamber 1455 connecting the overflow water tank 145 and the aerosol chamber 146, the bottom of the overflow water tank 145 is connected with the second slurry discharge pipe 1452 through the third valve, and the side wall of the overflow water tank 145 passes through the fourth The valve is connected with a second water supply pipe 1453 , and a water level monitor 1454 is arranged in the overflow water tank 145 .

In a further solution, the dust removal funnel 143 is an adjustable funnel, the air intake chamber 142 is an adjustable air intake chamber, the dust removal funnel 143 includes a cone fixed side wall and a cone adjustment side wall connected at both ends, and the air intake chamber includes The fixed side wall of the cylinder and the adjustment side wall of the cylinder connected at both ends, the upper end of the adjustment side wall of the cone is connected with the lower end of the adjustment side wall of the cylinder, and the adjustment side wall of the cone and the adjustment side wall of the cylinder are stretchable side walls , the cone adjustment side wall is connected with an adjustment handle through a support piece.

The stretchable sidewall can be an elastic stretchable sidewall; it can also be a non-elastic stretchable sidewall, for example, one end of the stretchable sidewall is fixedly connected with one end of the fixed sidewall, and the other end of the stretchable sidewall can be opposite to the fixed sidewall. The other end of the wall moves and enables a seal, ie, enables expansion of the extensible side wall. By moving the adjusting handle 1431, the stretchable side wall can be driven to elastically deform or move in the circumferential direction, so that the cross-sectional area of the air inlet chamber 142 and the dust removal funnel 143 can be adjusted, so that the gas flow rate of the air inlet 1421 can be adjusted on the same working surface ; When the dust remover of the coal mine comprehensive excavation working face dust removal system provided by the present invention is applied to different working faces, the extendable side wall can be adjusted, so as to realize the flexible adjustment of the cross-sectional area of the air inlet chamber 142 and the dust removal funnel 143 to adjust its internal Ventilation, to achieve the best speed of dust removal and purification.

In a further solution, the bottom of the dust removal funnel 143 is connected to the first slurry discharge pipe 1433 through the first valve, the side wall of the dust removal funnel 143 is connected to the first water supply pipe 141 through the second valve, and the overflow water tank 145 is arranged outside the dust removal funnel 143 And communicate with the dust removal funnel 143 through the overflow opening 1451, the upper part of the overflow water tank 145 is provided with a ventilation chamber 1455 connecting the overflow water tank 145 and the aerosol chamber 146, and the bottom of the overflow water tank 145 is connected with the second slurry discharge pipe 1452 through the third valve , the side wall of the overflow water tank 145 is connected with the second water supply pipe 1453 through the fourth valve, and the overflow water tank 145 is provided with a water level monitor 1454 .

The overflow water tank 145 is used to control the water level and the stability of the water level in the dust removal funnel 143. A ventilation chamber 1455 is set on the overflow water tank 145 to make the pressure of the overflow water tank 145 equal to that of the aerosol chamber 1455. The overflow opening 1451 is located in the dust removal funnel 143 miles, replace the overflow pipe that is easy to block with overflow opening 1451 and connect the water in the dust removal funnel 143 with the overflow water tank 145, reflect the water surface height in the dust removal funnel 143 by the overflow water tank 145, if the water level monitor 1454 When it is detected that the water level in the overflow water tank 145 is low, the control system supplies water to the overflow water tank 145 through the second water supply pipe 1453 to ensure that the water level of the dust collector is constant, thereby ensuring the stability of the dust removal efficiency.

In a more specific solution, the air inlet chamber 142 is a cylindrical cavity with a radius of 0.28m (the specific size needs to be determined according to the actual situation of the application site). In order to make the gas entering the dust collector evenly distributed over the entire S-shaped blade 144, The air inlet 1421 should be higher than the S-shaped blade 144 by a certain height, such as 0.5m; in order to prevent the dust removal funnel 143 from clogging, the angle of the dust removal funnel 143 should be ensured to be appropriately larger, and the initial funnel angle of the adjustable funnel is set to 55°, and the depth is 0.6m .

The air velocity in the clean room between the upper blade 1441 and the lower blade 1442 can reach 18-30m/s, and the air intake velocity generally does not exceed 18m/s. In order to avoid corrosion and facilitate dust removal, the S-shaped blade 144 is made of stainless steel. The shape and size of the S-shaped blade 144 are shown in Figures 11a and 11b. The S-shaped blade 144 must be installed horizontally. The assembled blade combination is shown in Figure 11c. Show.

The overflow opening 1451 is designed to be about 100mm×50mm. The control water level of the overflow water tank 145 is 20mm, that is, the overflow weir is 20mm higher than the lower edge of the upper blade 1441, and the fluctuation of the water level does not exceed 5mm. In order to reduce the fluctuation of the water surface, the first water supply The pipe 141, the second water supply pipe 1453 and the overflow opening 1451 are all buried below the control water level.

With the above structure, when the dust collector is energized, the dust collector is flushed to the starting water level through the first water supply pipe 141, and the water level is flush with the lower edge of the upper blade 1441, and then the draw-out fan 15 is started. The dust-laden gas flows into the air inlet chamber 142 from the air inlet 1421. Due to the expansion of the gas flow section, the gas flow velocity slows down, and the large particles of dust settle down due to gravity. The water and air are fully mixed, and the fine dust particles are captured. The air flow flows out of the S-shaped blade 144 from the air channel and enters the aerosol chamber 146. The gas flow section expands again, and the speed suddenly decreases. The dust containing water drops falls into the water and is captured by the water. The dust particles collected by water sink to the bottom of the dust removal funnel 143 and are discharged regularly through the first slurry pipe 1433 .

The aerosol chamber 146 does not need to be provided with a water baffle, which reduces the pressure loss of the aerosol chamber 146 . The cross-sectional size of the aerosol chamber 146 mainly depends on the packing chamber 147. The air flow velocity at which the packing in the packing chamber 147 can roll up and down and obtain the best dust removal efficiency is determined through experiments, and the cross-sectional area is calculated from this; the cross-sectional area of the aerosol chamber 146 It should be appropriately larger, so that the dust particles with large water droplets in the dust-laden airflow have enough time to settle into the water by their own weight due to the sudden decrease in velocity (the flow section increases).

In another specific scheme, the filler dust removal part includes a filler chamber 147, a filler ball 1473, a filler upper sieve plate 1472, a filler lower sieve plate 1471, the filler chamber 147 communicates with the aerosol chamber 146, the filler upper sieve plate 1472 and the filler The lower sieve plate 1471 is respectively arranged at the upper and lower ends of the packing chamber 147, and the packing is placed between the upper packing sieve plate 1472 and the lower packing sieve plate 1471, and the upper packing sieve plate 1472 is provided with a first nozzle 1474.

In a more specific solution, the diameter of the packing chamber 147 is not less than 0.38m, and the packing layer is a non-fixed packing layer, and the packing layer is made of polypropylene material with a diameter of 38mm and is similar to QTL-150T packing balls 1473 . Packing balls are stacked in 4 layers with a stacking height of 152mm. The distance between the lower sieve plate 1471 and the upper sieve plate 1472 is 456mm. The plate 1472 adopts the ribs made of nylon wire to intercept the filler ball 1473, and the lower sieve plate 1471 adopts the rib made of alloy steel wire to support the filler ball 1473. The first nozzle 1474 is a high-pressure spray nozzle, so that the filler ball 1473 can be fully soaked, and the first nozzle 1474 is connected with a first automatic spray system.

With the above structure, the filler dust removal part uses the first nozzle 1474 to spray the spray liquid with additives to the filler and the inertial collision, interception and adsorption of the filler. On the one hand, the filler balls 1473 roll up and down and wash each other under the action of the air flow The contact time between the dust and the spray liquid can be increased. On the other hand, the spray liquid wets the filler and forms a gas-liquid interface mass transfer in the filler ball 1473, increasing the dust collection effect. The collected dust can also fall into the dust removal funnel through the mutual collision of the filler balls 1473 and the washing of the spray liquid, and the mutual collision of the filler balls 1473 can also serve the purpose of cleaning the filler balls 1473, so that the dust-containing gas and the solution are fully Contact completes the dust removal process.

In another specific solution, the wet vibrating wire grid dedusting part includes a jet chamber 148, a vibrating wire grid 1410 and a vibrating wire grid pipeline 1413, the jet chamber 148 includes a gas inlet chamber and an ejector 149, and the ejector 149 includes a venturi The tube 1491 and the second nozzle 1492 arranged in the venturi tube 1491. The venturi tube 1491 includes a suction chamber 14911, a throat tube 14912 and a diffuser tube 14913 which are sequentially connected and integrally formed. The structure of the vibrating wire grid 1410 is shown in FIG. 12 As shown, one end of the gas inlet chamber is connected to the upper end of the packing chamber 147, the other end of the gas inlet chamber is connected to the suction chamber 14911 of the venturi tube 1491, and the diffusion tube 14913 of the venturi tube 1491 is connected to the vibrating wire grid pipeline 1413. The second nozzle 1492 is connected with the second automatic spraying system. The end of the vibrating wire grid pipeline 1413 connected to the diffuser pipe 14913 of the Venturi tube 1491 is provided with a multi-layer vibrating wire grid 1410. The strings are perpendicular to each other.

Along the wind flow direction, the vibrating wire grid pipeline 1413 is provided with a dust removal bucket 1411 and a demist bucket 1412 from front to back under the vibration wire grid 1410; A fan drain pipe 1414 is provided.

In a more specific solution, the cross section of the vibrating wire grid 1410 is designed to be a circle with a radius of 0.28m, the size of the vibrating wire grid pipeline 1413 is slightly larger than the size of the vibrating wire grid 1410, and the radius is designed to be 0.29m. The filter material of the vibrating wire grid 1410 is alloy steel wire with a diameter of 0.15-0.2 mm, and the distance between the vibrating wires is 1.5 mm. The structural diagram of the vibrating wire grid 1410 is shown in Figure 4. During installation, the vibrating wires of two adjacent vibrating wire grids 1410 should be arranged vertically at the front and horizontally at the rear, so that the vibrating wires on adjacent vibrating wire grids 1410 are perpendicular to each other. The vibrating wire grid 1410 has 8 layers, and it also plays the role of defogging while filtering dust. The dehydration part uses the vibrating wire grid 1410 to defog, and a fan is installed at the connection position between the vibrating wire grid pipeline 1413 and the draw-out fan 15 The drain pipe 1414 prevents the water brought out by the airflow from entering the draw-out fan 15 .

The ejector 149 includes a venturi tube 1491 and a second nozzle 1492 arranged in the venturi tube 1491. The pressurized water flow is ejected from the second nozzle 1492 at a very high speed, so that the pressure of the venturi tube suction chamber 14911 is reduced to form a negative pressure volume. Dust-laden air is sucked, and the airflow containing small particles of coal dust and liquid droplets are fully mixed in the throat inlet section of the Venturi tube and the throat pipe 14912 (the dust particles and liquid droplets in the gas condense into larger particles), and the gas-liquid mixture It is discharged through the Venturi diffuser 14913, its speed is slowed down, the pressure is increased, and a powerful jet flow is formed to uniformly cover all sections of the vibrating wire grid 1410 at a certain speed, as shown in FIG. 10 .

With the above structure, before the dust particles come into contact with the vibrating wire grid 1410, they are wetted by high-pressure spraying, some of the larger dust particles are directly captured by the water droplets for preliminary dust removal, and the other part of the dust is captured by the vibrating wire grid 1410. When the air containing dust flows through the vibrating wire grid 1410, the dust encounters the water film on the vibrating wire and intercepts it, and the vibrating wire of the vibrating wire grid 1410 generates high-frequency vibrations under the action of the air flow, which strengthens the water mist particles. Coagulation with dust particles in dusty air, thereby improving the dust collection efficiency of fine dust. Part of the dust is captured by the liquid film on the vibrating wire grid 1410 , and then absorbed by the water droplets on the vibrating wire. Due to its own gravity, it settles and collects into a water flow, which can also play a role in cleaning the vibrating wire grid 1410 . The wet dust particles and water mist flow into the dust removal bucket 1411 and the mist removal bucket 1412 respectively with the water flow, and the purified air flows to the extraction fan 15 .

The first nozzle 1474 and the second nozzle 1492 in the packing chamber 147 and the jet chamber 148 are all connected with a set of automatic spraying system, and the automatic spraying system includes a water valve, a water quality filter, a pressurizing device, a measuring device and an electric ball valve. , water quality filter, pressurizing device, measuring device, electric ball valve and the first nozzle 1474/second nozzle 1492 are connected sequentially through the connecting pipeline. Since the sensor is installed on the electric ball valve, the environment can be automatically judged. When there is dusty airflow When passing, the automatic control spray function is realized. The measuring device adopts SGS type dual-function high-pressure water meter, the water quality filter adopts GCQ-3 type water quality filter, the pressurizing device adopts BP-75/12 type mining spray pump, and each device uses a 25mm high-pressure hose with a diameter of 25mm to connect with a quick connector way to connect. The second nozzle 1492 uses 2 to 4 SD304 solid cone nozzles. When in use, the second nozzle 1492 atomizes the water, and after flowing out of the second nozzle 1492, it is atomized again under the impact of the high-speed dust-laden airflow, thereby realizing the secondary fog. The first nozzle 1474 selects a high-pressure spray nozzle so that the filler ball 1473 can be fully infiltrated.

In the dust collector, the dust-laden airflow flows out from the air inlet chamber 142, the S-shaped blade 144, the aerosol chamber 146, the stuffing chamber 147, the jet chamber 148, the vibrating wire grid 1410, and the fan drain pipe 1414 through the extractor fan 15. The working process is as follows:

①The dust-laden air flow enters the air intake chamber 142 from the air inlet 1421, and the cross section of the gas expands. Due to the decrease in speed, the large particles of dust settle down due to gravity, and then turn around. The gas is roughly purified;

②Under the suction effect of the extraction fan 15, the water level on the gas inlet side drops, and the water level on the outflow side rises, and the dust-laden airflow hits the liquid surface, causing a large number of water droplets to enter the S-shaped blade 144, and the gas and water are fully mixed, and a part of the dust The particles are adhered by water droplets and fall to the dust removal funnel 143, a part of fine dust particles flow through the S-shaped blade 144 due to the sudden turning to form centrifugal force, the water droplets and dust particles are thrown to the outer wall of the dust removal funnel, and flow to the dust removal funnel 143;

③The air flow enters the aerosol chamber 146 from the clean room flowing through the S-shaped blade 144, the gas flow area expands, the speed suddenly decreases, some dust particles settle by gravity, and the purified gas flows upward to the stuffing chamber 147;

④The first nozzle 1474 in the stuffing chamber 147 sprays the spray liquid containing additives downwards, and the non-fixed stuffing balls 1473 are fully wetted by the spraying fluid, and the wetted stuffing balls 1473 roll up and down under the impact of the gas, continuously Collision, due to the increase of the contact time and contact area between the dust and the spray liquid, the small particle size dust is trapped, and the dust on the filler ball 1473 falls into the dust removal funnel 143 due to the washing of the spray liquid and the collision of the filler ball 1473;

⑤ The second nozzle 1492 sprays the water out through the venturi tube 1481. Using the principle of jet flow, the high-speed spray further accelerates the inflow of the dust-containing gas at the interface between the spray and the vibrating wire grid 1410. Part of the dust is collided, condensed, and settled, and flows into the dedusting water in the bucket

⑥The dust-laden air passes through the vibrating wire grid 1410, and generates sound waves under the action of the vibrating wire vibration, which is intercepted by the vibrating wire grid 1410 and accelerates the agglomeration of dust particles, and falls into the dust removal bucket;

⑦ The vibrating wire grid 1410 also plays the role of defogging while filtering dust, especially the last few vibrating wire grids 1410 are mainly to achieve the demisting effect and make it fall into the demisting bucket 1412;

⑧A fan drain pipe 1414 is provided at the connection position between the vibrating wire grid pipeline 1413 and the draw-out fan 15, as shown in Figure 13, to collect and discharge the residual water droplets in the airflow, so as to prevent the water droplets from being brought into the draw-out fan 15 to affect other work performance.

The working principle and process of the coal mine fully mechanized excavation face dust removal system provided by the present invention are as follows:

(1) Dust control: the air flow generated by the press-in fan 1 enters the press-in air duct 2, and a flexible wall-attached air duct 3 is installed at the air outlet of the press-in air duct 2, and a part of the air flow of the press-in air duct 2 flows from the The conical air duct 31 blows to the working face in the form of a jet, and the other part of the air flow spirally blows forward through the strip-shaped air guide pipe 32, which reduces the air outlet at the end of the wall-mounted air duct 3 without changing the original air volume of the excavation working face. The wind speed at the location slows down the speed at which the dust produced by the roadheader diffuses to the rear of the roadway, so that a large amount of dust accumulates in front of the driver of the roadheader; at the same time, the air flow from the air duct 32 attached to the wall is formed along the roadway wall The spiral wind flow with a certain kinetic energy produces a good wall attachment effect and suppresses the flying of dust. The kinetic energy of this spiral air flow is greatly increased under the joint action of the axial velocity generated by the dust-laden air inhaled by the suction port of the dust suction duct 11, so that a barrier that can prevent the dust from spreading outward can be established in front of the driver's work area of the roadheader. The air curtain effectively seals the dust generated when the roadheader is working, prevents the dust from spreading outward, and provides a clean air environment for the driver of the underground roadheader.

(2) Dust collection: under the action of the draw-out fan 15, the dust suction air cylinder 11 inserted into the air curtain can suck the dusty air flow into the dust collector 14, and the first dust collection cover 8, the second dust collection cover 9, the first dust collection cover The three-dust suction cover 10 directly sucks the dust into the dust collector 14 at the main dust-producing points of the fully-mechanized excavation working face such as the cutting part 5 of the roadheader, the shovel plate 6, and the transfer point 7 of the scraper conveyor and the belt conveyor, which greatly improves the overall efficiency. The dust collection efficiency of the digging face.

(3) Dust collection: the dust-laden air flow enters the dust collector 14, and the dust removal process is sequentially purified from coarse particles, fine particles to fine particles: the first-level dust removal is a self-excited water bath dust removal part, and the gravity mechanism, inertia mechanism, and centrifugal mechanism are used for large Particle dust is collected; the secondary dust removal is the dust removal part of the filler, and the water bath mechanism and the spray mechanism are used to capture the smaller particle dust; the third stage dust removal is the high-efficiency dust removal part of the wet vibrating wire grid, and the high-efficiency dust removal mechanism of the vibrating wire grid is used to capture the breath Sexual dust. The dust collector is not easy to block, easy to clean, has the advantages of stable operation, high dust removal efficiency, large processing air volume, and convenient maintenance.

In the present invention, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention; meanwhile, for those of ordinary skill in the art, according to the present invention The idea of the invention will have changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. a kind of excavation face in coal mine dust pelletizing system, it is characterised in that：Including：

Dirt system is controlled, the control dirt system is arranged on development machine side, and the control dirt system includes the forced wind being sequentially connected Machine, forced air duct and air duct；

Dust collecting system, the dust collecting system includes the first dust shield, the second dust shield, the 3rd dust shield, dust suction air duct and dust suction Cover assembling case, first dust shield, the second dust shield and the 3rd dust shield be respectively used to draw at cutting head of roadheader position, Dust at shovel board of development machine position and at scratch board conveyor and belt conveyor transhipment point position, first dust shield, institute State the second dust shield and the 3rd dust shield to be connected by airduct and dust shield assembling case, the dust suction air duct and institute State dust shield assembling case connection；

And dust collecting system, the dust collecting system is arranged on the opposite side of development machine, and the dust collecting system includes what is be sequentially connected Pull-out type air duct, deduster and exhaust fan, the pull-out type air duct are connected with dust shield assembling case.

2. excavation face in coal mine dust pelletizing system according to claim 1, it is characterised in that：The air duct includes cylinder Body and the multiple guide ducts being arranged on the cylinder lateral wall, each guide duct is along the cylinder lateral wall helically line style cloth Put, guide duct air inlet and guide duct air outlet, cylinder described in the guide duct air inlet insertion are provided with each guide duct The barrel of body.

3. excavation face in coal mine dust pelletizing system according to claim 2, it is characterised in that：The air intake of the cylinder and Outlet air end is connected to air duct reducing and taper air duct, and the taper air duct and the air duct reducing are with the cylinder can Dismounting connection.

4. excavation face in coal mine dust pelletizing system according to claim 1, it is characterised in that：First dust shield, institute Netted iron wire is provided with the suction port for stating the second dust shield and the 3rd dust shield, the dust shield assembling case, which is provided with, to be divided Airduct, the airduct of second dust shield, the airduct of the 3rd dust shield and the dust suction not with first dust shield Deflector is provided with the casing air inlet that air duct is connected, each casing air inlet.

5. excavation face in coal mine dust pelletizing system according to claim 1, it is characterised in that：The deduster is included sequentially Self-excitation bathing dust removal part, filler dust removal part and the wet type vibratory string grid dust removal part of connection, the self-excitation bathing dedusting Part is used to trap big dust particle, and the filler dust removal part is used to trap smaller particle dust, and the wet type vibratory string grid are removed Dirt part is used to trap respirable dust.

6. excavation face in coal mine dust pelletizing system according to claim 5, it is characterised in that：The self-excitation bathing dedusting Part includes being provided with and the pull-out type on inlet plenum, dedusting funnel, S types blade, spill box and aerosol chamber, the inlet plenum The air inlet of air duct connection, the inlet plenum and the aerosol chamber are and described close to being disposed side by side on above the dedusting funnel Inlet plenum and the aerosol chamber are connected with the dedusting funnel；The S types blade is horizontally disposed in the inlet plenum and described Between aerosol chamber and above the dedusting funnel, the S types blade includes blade and lower blade, upper leaf piece and institute State and form clean room between lower blade；The dedusting funnel bottom is connected with the first discharge pipe, the dedusting by the first valve Hopper side walls are connected with the first feed pipe by the second valve；The spill box is arranged on the outside of the dedusting funnel and passed through Overflow openings are connected with the dedusting funnel, and the spill box top is communicated with the spill box and the aerosol chamber Breather chamber, the spill box bottom is connected with the second discharge pipe by the 3rd valve, and spill box side wall passes through the 4th Valve, which is connected with the second feed pipe, the spill box, is provided with water level monitor.

7. excavation face in coal mine dust pelletizing system according to claim 6, it is characterised in that：The dedusting funnel is adjustable Formula funnel, the inlet plenum is is adjustable into air chamber, and the dedusting funnel includes the cone fixed sidewall and cone that two ends are connected with each other Body adjusts side wall, and the inlet plenum includes the cylinder fixed sidewall and cylinder adjustment side wall that two ends are connected with each other, and the cone is adjusted The lower end that the upper end of whole side wall adjusts side wall with the cylinder is connected, and the cone adjustment side wall and cylinder adjustment side wall are Extensible side wall, the cone adjustment side wall is connected with regulation hand handle by support member.

8. excavation face in coal mine dust pelletizing system according to claim 5, it is characterised in that：The filler dust removal unit subpackage Sieve plate under filler chamber, packing layer, filler upper sieve plate, filler is included, the filler chamber connects with the aerosol chamber, sieved on the filler Sieve plate is separately positioned on the upper and lower ends of the filler chamber under plate and the filler, and described filler layer is arranged on the filler and sieved Under plate and the filler between sieve plate, first jet is provided with the filler upper sieve plate, the first jet is high-pressure fog Nozzle, the first jet is connected with the first automatic spraying system.

9. excavation face in coal mine dust pelletizing system according to claim 5, it is characterised in that：The wet type vibratory string grid dedusting Part includes jet room, vibratory string grid and vibratory string bank tube road, and the jet room includes gas and enters chamber and ejector, the ejector Including Venturi tube and the second nozzle being arranged in the Venturi tube, the Venturi tube includes being sequentially connected and integrally formed suction Air chamber, trunnion and anemostat, the gas are connected into chamber one end with the upper end of the filler chamber, and the gas enters the another of chamber One end is connected with the induction chamber, and the anemostat is connected with the vibratory string bank tube road, and the second nozzle is connected with second certainly Vibratory string grid described in multilayer are provided with dynamic spraying system, one end that the vibratory string bank tube road is connected with the anemostat, it is front and rear adjacent The vibratory string silk of the vibratory string grid set is orthogonal.

10. excavation face in coal mine dust pelletizing system according to claim 9, it is characterised in that：Along distinguished and admirable flow direction, institute State vibratory string bank tube road and be disposed with dedusting bucket and demisting bucket from front to back in the lower section of the vibratory string grid；The vibratory string grid The link position of pipeline and the exhaust fan is provided with blower fan drainpipe.