CN207445851U - A kind of New Coal Mine efficient composite wet scrubber - Google Patents

Abstract

The utility model discloses a new high-efficiency composite wet dust collector for coal mines. Dust removal, the dust removal process is purified sequentially from coarse particles, fine particles to fine particles: the self-excited water bath dust removal part for the first-level dust removal collects large particle dust, the second-level dust removal uses the filler dust removal part to capture smaller particle dust, and the third-level dust removal Wet vibrating wire Shan dust removal part is used for dust removal to capture respirable dust; it has large air volume, high dust removal efficiency, is not easy to block, easy to clean, has the advantages of stable operation and convenient maintenance; it can effectively solve the problem of using a dust collector with a dust removal efficiency of up to However, the use of multi-stage dust removal equipment cannot meet the narrow space, special technical conditions and cost requirements of the coal mine underground, so as to deal with the problems of large dust generation and high concentration in the fully mechanized excavation working face of the coal mine.

Description

A New Coal Mine High Efficiency Composite Wet Dust Collector

technical field

The utility model relates to the technical field of dust removal in coal mines, in particular to a novel high-efficiency composite wet dust collector for 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 production has increased sharply, and there are problems such as large dust production and high concentration, which seriously affect the health of workers and threaten the safe production of mines.

Dust removal by dust collector is one of the efficient dust prevention measures for tunneling face. At present, the dust collectors used at home and abroad can be divided into four categories according to the different dust particle collection mechanisms: mechanical dust collector, filter dust collector, wet dust collector device, electrostatic precipitator. Compared with other dust collectors, the wet dust collector has the characteristics of high dust removal efficiency, cooling, increasing humidity and handling flammable, explosive and harmful toxic gases. It has been widely used in metallurgy, mining and other industries. Wet dust collectors can handle harmful gases and have higher dust removal efficiency than dry dust collectors. However, compared with dry dust collectors (such as bag filters), wet dust collectors with a single dust removal mechanism have problems such as small air volume and low dust removal efficiency. Multi-mechanism comprehensive Type dust collector is the development direction to improve dust removal efficiency.

In practical applications, the dust collector also has problems such as easy blockage, inconvenient cleaning, unstable operation, and inconvenient maintenance. Sometimes in order to achieve the required dust removal efficiency, multiple dust removal equipments are used in series. The multi-stage dust removal system sometimes has three or four stages of dust removal equipment. The first-level dust removal system cannot meet the narrow space, special technical conditions and cost requirements of the coal mine underground.

Utility model content

In view of the above situation, the purpose of this utility model is to provide a new type of high-efficiency composite wet dust collector for coal mines to solve the problems in the above-mentioned prior art. It has the advantages of stable operation and convenient maintenance; it can effectively solve the problem that the dust removal efficiency cannot be achieved by using a dust collector, and the multi-stage dust removal equipment cannot meet the narrow space, special technical conditions and cost requirements of the coal mine underground. In order to deal with the problems of large dust generation and high concentration in the fully mechanized excavation face of coal mines.

In order to achieve the above object, the utility model provides the following scheme:

The utility model provides a new high-efficiency composite wet dust collector for coal mines, comprising: a first water supply pipe, an air inlet chamber, an air inlet, a dust removal funnel, an adjustment handle, a support member, a first slurry discharge pipe, S-shaped blades, Upper vane, lower vane, overflow water tank, overflow opening, second slurry discharge pipe, second water supply pipe, water level monitor, ventilation chamber, aerosol chamber, packing chamber, packing lower sieve plate, packing upper sieve plate, packing Ball, first nozzle, jet chamber, ejector, venturi tube, suction chamber, throat pipe, diffuser pipe, second nozzle, vibrating wire grid, dust removal bucket, mist removal bucket, vibrating wire grid pipeline, fan Drainage pipe, the dust collector is a high-efficiency composite wet dust collector integrating a water bath, filler, ejector, and vibrating wire. It is composed of a self-excited water bath dust removal part, a filler dust removal part and a wet vibrating wire grid dust removal part. It includes multi-stage dust removal, and the dust removal process is sequentially purified from coarse particles, fine particles to fine particles: the first-level dust removal uses a self-excited water bath dust removal part to capture large particles of dust, and the second-level dust removal uses a filler dust removal part to capture smaller particles Dust, three-stage dust removal uses wet vibrating wire Shan dust removal part to capture respirable dust.

Preferably, the self-excited water bath dust removal part includes an air inlet chamber, a dust removal funnel, an S-shaped blade, an overflow water tank and an aerosol chamber, and the packing dust removal part includes a packing chamber, a packing layer, a packing upper sieve plate, and a packing lower screen plate, the wet vibrating wire grid dust removal part includes a jet chamber, a vibrating wire grid and a vibrating wire grid pipeline, the jet chamber includes a gas inlet chamber and a jet device; the self-excited water bath dust removal part, the packing dust removal part The dust removal part of the wet vibrating wire grid is sequentially connected upwards from the bottom of the dust collector.

Preferably, the air inlet chamber is provided with an air inlet connected to the extraction type air duct, the air inlet chamber and the aerosol chamber are arranged side by side above the dust removal funnel, and the air inlet Both the chamber and the aerosol chamber communicate with the dust removal funnel; the S-shaped blades are horizontally arranged between the air inlet chamber and the aerosol chamber and above the dust removal funnel, and the S-shaped blades include The upper blade and the lower blade form a clean room between the upper blade and the lower blade; the bottom of the dust removal funnel is connected with a first slurry discharge pipe through a first valve, and the side wall of the dust removal funnel is connected with a The first water supply pipe.

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 overflow water tank is arranged on the outside of the dust removal funnel and communicates with the dust removal funnel through an overflow opening, and the upper part of the overflow water tank is provided with a ventilation chamber communicating with the overflow water tank and the aerosol chamber , the bottom of the overflow water tank is connected with the second slurry discharge pipe through the third valve, the side wall of the overflow water tank is connected with the second water supply pipe through the fourth valve, and the overflow water tank is provided with a water level monitor

Preferably, the packing chamber communicates with the aerosol chamber, the packing upper sieve plate and the packing lower sieve plate are respectively arranged at the upper and lower ends of the packing chamber, and the packing layer is arranged on the packing Between the sieve plate and the lower sieve plate of the filler, a first nozzle is arranged on the upper sieve plate of the filler, the first nozzle is a high-pressure spray nozzle, and the first nozzle is connected with a first automatic spray system.

Preferably, the jet chamber includes a gas inlet chamber and an ejector, the ejector includes a venturi tube and a second nozzle arranged in the venturi tube, and the venturi tube includes sequentially connected and integrally formed suction One end of the gas inlet chamber is connected to the upper end of the packing chamber, the other end of the gas inlet chamber is connected to the suction chamber, and the diffusion pipe is connected to the vibrating wire grid tube The second nozzle is connected with the second automatic spraying system, the end of the vibrating wire grid pipeline connected with the diffuser pipe is provided with multiple layers of the vibrating wire grid, and the vibrating wire grids arranged adjacently before and after The vibrating wires of the string grid are perpendicular to each other.

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

Compared with the prior art, the utility model has achieved the following technical effects:

The utility model provides a new high-efficiency composite wet dust collector for coal mines with large air volume, high dust removal efficiency, not easy to block, easy to clean, stable operation, convenient maintenance, etc., and generally does not increase the space occupied by the dust removal system. The lower dust removal efficiency reaches more than 98.6%, which can effectively solve the problem that the dust removal efficiency cannot be achieved by using a dust collector, and the multi-stage dust removal equipment cannot meet the narrow space, special technical conditions and cost requirements of the coal mine underground. There are problems such as large dust generation and high concentration in the fully mechanized excavation face of coal mines. Its implementation and application is also of great significance to the air purification technology in places with harmful gases or combustible dust, and its promotion and application has great social and economic benefits.

The dust-laden air flow enters the dust collector from the air inlet, and flows out from the air intake chamber, S-shaped blade, aerosol chamber, packing chamber, jet chamber, vibrating wire grid, and fan drain pipe through the withdrawable fan; the dust removal process starts from coarse particles, fine Particles to fine particles are purified sequentially, 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 capture large particle dust; the second stage dust removal is a packing dust removal part, water bath Mechanism and spraying mechanism capture smaller particle dust; the three-stage dust removal is the 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 respirable dust.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a structural schematic diagram of a novel coal mine high-efficiency composite wet dust collector of the utility model;

Fig. 2 a is the shape and size (mm) schematic diagram of the blade on the S-shaped blade of a novel coal mine high-efficiency composite wet dust collector of the utility model;

Fig. 2 b is a schematic diagram of the shape and size (mm) of the lower blade of the S-shaped blade of a novel coal mine high-efficiency composite wet dust collector of the present invention;

Fig. 2c is a schematic diagram of the combination of S-shaped blades of a new coal mine high-efficiency composite wet dust collector of the utility model;

Fig. 3 is a schematic structural view of a jet device of a novel coal mine high-efficiency composite wet dust collector of the utility model;

Fig. 4 is a structural schematic diagram of a vibrating wire grid of a novel coal mine high-efficiency composite wet dust collector of the utility model;

Fig. 5 is a structural schematic diagram of a fan drain pipe of a new high-efficiency composite wet dust collector for coal mines according to the utility model.

In the figure: 1-the first water supply pipe; 2-intake chamber; 21-air inlet; 3-dust removal funnel; 31-adjusting handle; 32-support; Blade; 41-upper blade; 42-lower blade; 5-overflow tank; 51-overflow opening; 52-second slurry discharge pipe; 53-second water supply pipe; 54-water level monitor; 55-ventilation chamber; 6-Aerosol chamber; 7-Packing chamber; 71-Packing lower sieve plate; 72-Packing sieve plate; 73-Packing ball; 74-First nozzle; 8-Jet chamber; 9-Ejector; 91-Venturi Pipe; 911-suction chamber; 912-throat pipe; 913-diffusion pipe; 92-second nozzle; 10-vibrating wire grid; 11-dust bucket; 12-demist bucket; ; 14-fan drain pipe; 141-dust collector inner cylinder, 142-fan outer cylinder, 143-fan drain pipe drain; 15-drawing fan.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In view of the above situation, the purpose of this utility model is to provide a new type of high-efficiency composite wet dust collector for coal mines to solve the problems in the above-mentioned prior art. It has the advantages of stable operation and convenient maintenance; it can effectively solve the problem that the dust removal efficiency cannot be achieved by using a dust collector, and the multi-stage dust removal equipment cannot meet the narrow space, special technical conditions and cost requirements of the coal mine underground. In order to deal with the problems of large dust generation and high concentration in the fully mechanized excavation face of coal mines.

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The utility model provides a new high-efficiency composite wet dust collector for coal mines, as shown in Figure 1, comprising: a first water supply pipe 1, an air inlet chamber 2, an air inlet 21, a dust removal funnel 3, an adjustment handle 31, and a support member 32. The first pulp pipe 33, the S-shaped blade 4, the upper blade 41, the lower blade 42, the overflow water tank 5, the overflow opening 51, the second pulp pipe 52, the second water supply pipe 53, the water level monitor 54, Vent chamber 55, aerosol chamber 6, packing chamber 7, filler lower sieve plate 71, filler upper sieve plate 72, filler ball 73, first nozzle 74, jet chamber 8, ejector 9, venturi tube 91, suction chamber 911, throat pipe 912, diffuser pipe 913, second nozzle 92, vibrating wire grid 10, dust removal water bucket 11, demisting water bucket 13, vibrating wire grid pipeline 13, fan drain pipe 14, dust collector inner cylinder 141, Fan outer cylinder 142, fan drain pipe drainage 143, the dust collector is a high-efficiency composite wet dust collector integrating water bath, filler, jet, and vibrating string. It is composed of self-excited water bath dust removal part, filler dust removal part and The wet-type vibrating wire grid dust removal part consists of multi-stage dust removal. The dust removal process is sequentially purified from coarse particles, fine particles to fine particles: the self-excited water bath dust removal part for the first-level dust removal collects large particles of dust, and the second-level dust removal is used The filler dust removal part captures smaller particle dust, and the third-stage dust removal uses a wet-type vibrating wire Shan dust removal part to capture respirable dust.

The self-excited water bath dedusting part includes air inlet chamber 2, dust removal funnel 3, S-shaped blade 4, overflow water tank 5 and aerosol chamber 6, and the packing dedusting part includes packing chamber 7, packing ball 73, packing upper sieve plate 72, packing lower The sieve plate 71, the wet vibrating wire grid dust removal part includes the jet chamber 8, the vibrating wire grid 10 and the vibrating wire grid pipeline 13; connections.

With the above structure, the utility model provides a new high-efficiency composite wet dust collector for coal mines with large air volume, high dust removal efficiency, not easy to block, easy to clean, stable operation, convenient maintenance, etc., without increasing the space occupied by the dust removal system. The dust removal efficiency can reach more than 98.6% when the size is small, which can effectively solve the problem that the dust removal efficiency cannot be achieved by using a dust collector, and the multi-stage dust removal equipment cannot meet the narrow space, special technical conditions and cost requirements of the coal mine underground. , in order to deal with the problems of large dust generation and high concentration in the fully mechanized excavation face of coal mines. Its implementation and application is also of great significance to the air purification technology in places with harmful gases or combustible dust, and its promotion and application has great social and economic benefits.

The dust-laden wind enters the dust collector through the air inlet 21, and passes through the draw-out fan 15 from the air inlet chamber 2, S-shaped blade 4, aerosol chamber 6, packing chamber 7, jet chamber 8, vibrating wire grid 10, and fan drain pipe 14. flow out.

In the specific scheme, the self-excited water bath dedusting part includes an air inlet chamber 2, a dust removal funnel 3, an S-shaped blade 4, an overflow water tank 5 and an aerosol chamber 6, and an air inlet 21 is opened on the air inlet chamber 2, and the air inlet chamber 2 and the aerosol chamber 6 are arranged side by side above the dust removal funnel 3, and both the air inlet chamber 2 and the aerosol chamber 6 communicate with the dust removal funnel 3, and the S-shaped blade 4 is installed horizontally between the air inlet chamber 2 and the aerosol chamber 6 and is located in the dust removal Above the funnel 3, the S-shaped vane 4 includes an upper vane 41 and a lower vane 42. As shown in Figures 2a to 2c, a clean room is formed between the upper vane 41 and the lower vane 42; the bottom of the dust removal funnel 3 is connected with a first The slurry discharge pipe 33 and the side wall of the dust removal funnel 3 are connected to the first water supply pipe 1 through the second valve. The overflow water tank 5 is arranged on the outside of the dust removal funnel 3 and communicates with the dust removal funnel 3 through the overflow opening 51. There is a ventilation chamber 55 connecting the overflow water tank 5 and the aerosol chamber 6, the bottom of the overflow water tank 5 is connected with the second slurry discharge pipe 52 through the third valve, and the side wall of the overflow water tank 5 is connected with the second water supply pipe 53 through the fourth valve , The overflow water tank 5 is provided with a water level monitor 54.

In a further solution, the dust removal funnel 3 is an adjustable funnel, the air intake chamber 2 is an adjustable air intake chamber, the dust removal funnel 3 includes a cone fixed side wall and a cone adjustment side wall connected to each other 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 31, 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 2 and the dust removal funnel 3 can be adjusted, so that the gas flow rate of the air inlet 21 can be adjusted on the same working surface When the utility model provides a new high-efficiency composite wet dust collector for coal mines, when it is applied to different working faces, the side wall can be adjusted and stretched, so as to realize the flexible adjustment of the cross-sectional area of the air inlet chamber 2 and the dust removal funnel 3 to adjust its interior The ventilation volume reaches the best speed of dust removal and purification.

In a further solution, the bottom of the dust removal funnel 3 is connected to the first slurry discharge pipe 33 through the first valve, the side wall of the dust removal funnel 3 is connected to the first water supply pipe 1 through the second valve, and the overflow water tank 5 is arranged outside the dust removal funnel 3 And communicate with the dust removal funnel 3 through the overflow opening 51, the upper part of the overflow water tank 5 is provided with a ventilation chamber 55 connecting the overflow water tank 5 and the aerosol chamber 6, and the bottom of the overflow water tank 5 is connected with the second slurry discharge pipe 52 through the third valve A second water supply pipe 53 is connected to the side wall of the overflow water tank 5 through a fourth valve, and a water level monitor 54 is arranged in the overflow water tank 5 .

The overflow water tank 5 is used to control the water level and the stability of the water level in the dust removal funnel 3. A ventilation chamber 55 is set on the overflow water tank 5 to make the pressure of the overflow water tank 5 and the aerosol chamber 55 equal, and the overflow opening 51 is located in the dust removal funnel 3 mile, replace the overflow pipe that is easy to block with overflow opening 51 and connect the water in the dust removal funnel 3 with the overflow water tank 5, reflect the water surface height in the dust removal funnel 3 by the overflow water tank 5, if the water level monitor 54 When it is detected that the water level in the overflow water tank 5 is low, the control system supplies water to the overflow water tank 5 through the second water supply pipe 53 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 2 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 throughout the S-shaped blade 4, The air inlet 21 should be higher than the S-shaped blade 4 by a certain height, such as 0.5m; in order to prevent the dust removal funnel 3 from clogging, the angle of the dust removal funnel 3 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 41 and the lower blade 42 can reach 18～30m/s, and the intake velocity is generally no more than 18m/s. In order to avoid corrosion and facilitate dust removal, the S-shaped blade 4 is made of stainless steel. The shape and size of the S-shaped blade 4 are shown in 2a. The S-shaped blade 4 must be installed horizontally. The assembled blade combination is shown in Figure 2b.

The overflow opening 51 is designed to be about 100mm × 50mm, and the control water level of the overflow water tank 5 is 20mm, that is, the overflow weir is 20mm higher than the lower edge of the upper blade 41, and the fluctuation of the water level is not more than 5mm. In order to reduce the fluctuation of the water surface, the first water supply The pipe 1, the second water supply pipe 53 and the overflow opening 51 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 1, and the water level is flush with the lower edge of the upper blade 41, and then the draw-out fan 15 is started. The dust-laden gas flows into the air inlet chamber 2 from the air inlet 21. Due to the expansion of the gas flow section, the gas flow velocity slows down, and the large particles of dust settle down by 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 4 from the air duct and enters the aerosol chamber 6. 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 3 and are regularly discharged through the first row of slurry pipes 33 .

The aerosol chamber 6 does not need to be provided with a water baffle, which reduces the pressure loss of the aerosol chamber 6 . The cross-sectional size of the aerosol chamber 6 mainly depends on the packing chamber 7. The air flow velocity at which the packing in the packing chamber 7 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 6 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 7, a filler ball 73, an upper sieve plate 72 for the filler, and a lower sieve plate 71 for the filler, the filler chamber 7 communicates with the aerosol chamber 6, and the upper sieve plate 72 and the filler The lower sieve plate 71 is respectively arranged at the upper and lower ends of the packing chamber 7, and the packing is placed between the upper packing sieve plate 72 and the lower packing sieve plate 71, and the upper packing sieve plate 72 is provided with a first nozzle 74.

In a more specific solution, the diameter of the packing chamber 7 is not less than 0.38m, the packing layer is a non-fixed packing layer, and the packing layer is a packing ball 73 made of polypropylene material with a diameter of 38mm and similar in shape to QTL-150T. Packing balls are stacked in 4 layers with a stacking height of 152mm. The distance between the lower sieve plate 71 and the upper sieve plate 72 is 456mm. Plate 72 adopts the slats made of nylon wire to intercept packing ball 73, and the sieve plate 71 adopts the slats made of alloy steel wire to support packing ball 73 under the filler. The first nozzle 74 is a high-pressure spray nozzle, so that the filler ball 73 can be fully soaked, and the first nozzle 74 is connected with a first automatic spray system.

With the above structure, the filler dust removal part uses the first nozzle 74 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 73 roll up and down under the action of the air flow and wash each other 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 73, increasing the dust collection effect. The collected dust can also fall into the dust removal funnel through the mutual collision of the filler balls 73 and the washing of the spray liquid, and the mutual collision of the filler balls 73 can also serve the purpose of cleaning the filler balls 73, so that the dust-containing gas and the solution are fully Contact completes the dust removal process.

In another specific scheme, the dust removal part of the wet vibrating wire grid includes a jet chamber 8, a vibrating wire grid 10 and a vibrating wire grid pipeline 13, the jet chamber 8 includes a gas inlet chamber and an ejector 9, and the ejector 9 includes a venturi The tube 91 and the second nozzle 92 arranged in the venturi tube 91, the venturi tube 91 includes a suction chamber 911, a throat tube 912 and a diffuser tube 913 which are sequentially connected and integrally formed. The structure of the vibrating wire grid 10 is shown in Figure 4 As shown, one end of the gas inlet chamber is connected to the upper end of the packing chamber 7, the other end of the gas inlet chamber is connected to the suction chamber 911 of the venturi tube 91, and the diffusion tube 913 of the venturi tube 91 is connected to the vibrating wire grid pipeline 13. Two nozzles 92 are connected with the second automatic spraying system, and the end where the vibrating wire grid pipeline 13 is connected with the diffusion pipe 913 of the Venturi tube 91 is provided with a multi-layer vibrating wire grid 10, and the vibrating wire grid 10 adjacent to the front and back is provided with a vibrating wire grid 10 The strings are perpendicular to each other.

Along the wind flow direction, the vibrating wire grid pipeline 13 is provided with a dust removal bucket 11 and a demisting bucket 12 from front to back under the vibration wire grid 10; A fan drain pipe 14 is provided.

In a more specific solution, the cross-section of the vibrating wire grid 10 is designed to be a circle with a radius of 0.28m, the size of the vibrating wire grid pipeline 13 is slightly larger than that of the vibrating wire grid 10, and the radius is designed to be 0.29m. The filter material of the vibrating wire grid 10 is an alloy steel wire with a diameter of 0.15-0.2 mm, and the distance between the vibrating wires is 1.5 mm. The schematic diagram of the structure of the vibrating wire grid 10 is shown in Figure 4. During installation, the vibrating wires of two adjacent vibrating wire grids 10 should be arranged vertically at the front and horizontally at the rear, so that the vibrating wires on adjacent vibrating wire grids 10 are perpendicular to each other. The 10 layers of the vibrating wire grid are 8 layers, which also play the role of defogging while filtering dust. The dehydration part uses the vibrating wire grid 10 to defog, and the fan is installed at the connection position between the vibrating wire grid pipeline 13 and the draw-out fan 15 The drain pipe 14 prevents the water brought out by the airflow from entering the draw-out fan 15 .

The ejector 9 includes a venturi tube 91 and a second nozzle 92 arranged in the venturi tube 91. The pressurized water flow is ejected from the second nozzle 92 at a very high speed, so that the pressure in the suction chamber 911 of the venturi tube is reduced to form a negative pressure coil. Dust-laden air is sucked, and the airflow containing smaller particles of coal dust and liquid droplets are fully mixed in the throat inlet section of the Venturi tube and the throat 912 (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 tube 913, its speed is slowed down, and the pressure is increased to form a powerful jet flow that evenly covers the entire section of the vibrating wire grid 10 at a certain speed, as shown in FIG. 3 .

With the above structure, before the dust particles come into contact with the vibrating wire grid 10, 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 10. When the air containing dust flows through the vibrating wire grid 10, the dust encounters the water film on the vibrating wire and intercepts it and stays, and the vibrating wire of the vibrating wire grid 10 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 10, 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 10. The wet dust particles and water mist flow into the dust removal bucket 11 and the mist removal bucket 12 respectively along with the water flow, and the purified air flows to the extraction fan 15 .

The first nozzle 74 and the second nozzle 92 in the packing chamber 7 and the jet chamber 8 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, and the water valve , water quality filter, pressurizing device, measuring device, electric ball valve and the first nozzle 74/second nozzle 92 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 the diameter of each device is 25mm. The high-pressure hose is connected by a quick connector way to connect. The second nozzle 92 uses 2 to 4 SD304 solid cone nozzles. When in use, the second nozzle 92 atomizes the water, and after flowing out of the second nozzle 92, it is atomized again under the impact of the high-speed dust-laden airflow, thereby realizing the secondary fog. The first nozzle 74 selects a high-pressure spray nozzle so that the filler ball 73 can be fully infiltrated.

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. Dust is collected; the secondary dust removal is the dust removal part of the filler, and the water bath mechanism and the spraying mechanism capture small particle dust; the third stage dust removal is the wet vibrating wire grid dust removal part, and the vibrating wire grid high-efficiency dust removal mechanism is used to capture respirable dust . The dust collector has the advantages of large air volume, high dust removal efficiency, not easy to block, easy to clean, stable operation, and convenient maintenance. The dust removal efficiency can reach more than 98.6% without increasing the space occupied by the dust removal system. The dust removal efficiency of a dust collector cannot be reached, and the use of multi-stage dust removal equipment cannot meet the narrow space, special technical conditions and cost requirements of the coal mine underground, in order to deal with the large amount of dust generated in the fully mechanized excavation working face of the coal mine. high concentration issues. Its implementation and application is also of great significance to the air purification technology in places with harmful gases or combustible dust, and its promotion and application has great social and economic benefits.

The dust-laden wind enters the dust collector through the air inlet 21, and passes through the draw-out fan 15 from the air inlet chamber 2, S-shaped blade 4, aerosol chamber 6, packing chamber 7, jet chamber 8, vibrating wire grid 10, and fan drain pipe 14. flow out.

The working principle and process of a new coal mine high-efficiency composite wet dust collector system provided by the utility model are as follows:

①The dust-laden air flow enters the air intake chamber 2 from the air inlet 21, and the cross section of the gas expands. Due to the decrease in speed, the large particles of dust settle by gravity, and then turn around. Due to inertial collision and centrifugal mechanism, part of the dust settles to the dust removal funnel 3, and the dust 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, arousing a large number of water droplets into the S-shaped blade 4, 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 3, some fine dust particles flow through the S-shaped blade 4 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 3;

③The air flow enters the aerosol chamber 6 from the purification chamber flowing through the S-shaped blade 4, the gas flow area expands, the speed suddenly decreases, some dust particles settle by gravity, and the purified gas flows upward to the packing chamber 7;

④ The first nozzle 74 in the stuffing chamber 7 sprays the spray liquid containing additives downwards, the non-fixed stuffing balls 73 are fully wetted by the spraying fluid, and the wetted stuffing balls 73 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 captured, and the dust on the filler ball 73 falls into the dust removal funnel 3 due to the washing of the spray liquid and the collision of the filler ball 73;

⑤ The second nozzle 92 sprays the water out through the venturi tube 81. 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 10, and part of the dust is collided, condensed, and settled, and flows into the dedusting water in the bucket

⑥The dust-laden air flows through the vibrating wire grid 10, and generates sound waves under the action of the vibrating wire vibration, which is intercepted by the vibrating wire grid 10 and accelerates the agglomeration of dust particles, and falls into the dust removal bucket;

⑦ The vibrating wire grid 10 also plays the role of demisting while filtering dust, especially the last few vibrating wire grids 10 are mainly to achieve the demisting effect and make it fall into the demisting bucket 12;

⑧ A fan drain pipe 14 is provided at the connection position between the vibrating wire grid pipeline 13 and the draw-out fan 15, as shown in Figure 5, 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.

In the utility model, specific examples have been applied to explain the principle and implementation of the utility model, and the descriptions of the above examples are only used to help understand the method of the utility model and its core idea; meanwhile, for those of ordinary skill in the art , according to the idea of the utility model, there will be changes in the specific implementation and application range. To sum up, the contents of this specification should not be understood as limiting the utility model.

Claims (4)

1. A novel coal mine high-efficiency composite wet dust collector is characterized in that: the dust collector includes a self-excited water bath dust removal part, a filler dust removal part and a wet vibrating wire grid dust removal part, the self-excited water bath dust removal part, the The dust removal part of the filler and the dust removal part of the wet vibrating wire grid are sequentially connected upwards from the bottom of the dust collector; The self-excited water bath dedusting part collects large particle dust, the secondary dust removal uses the filler dedusting part to capture smaller particle dust, and the tertiary dedusting uses the wet vibrating string dedusting part to capture respirable dust. 2. The new high-efficiency composite wet dust collector for coal mine according to claim 1, characterized in that: 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 There is an air inlet on the air inlet chamber, and the air inlet chamber and the aerosol chamber are arranged side by side above the dust removal funnel, and both the air inlet chamber and the aerosol chamber are connected to the dust removal funnel Communication; the S-shaped blade is arranged horizontally 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 the upper blade and the A clean room is formed between the lower blades; the bottom of the dust removal funnel is connected to the first slurry discharge pipe through the first valve, and the side wall of the dust removal funnel is connected to the first water supply pipe through the second valve; the dust removal funnel is an adjustable funnel , the air inlet chamber is an adjustable air inlet chamber, the dust removal funnel includes a cone fixed side wall and a cone adjustment side wall connected at both ends, and the air inlet chamber includes a cylinder fixed side connected at both ends The wall and the cylinder adjustment side wall, the upper end of the cone adjustment side wall is connected to the lower end of the cylinder adjustment side wall, the cone adjustment side wall and the cylinder adjustment side wall are stretchable side walls, The adjustment side wall of the cone is connected with an adjustment handle through a support; the overflow water tank is arranged outside the dust removal funnel and communicated with the dust removal funnel through an overflow opening; The overflow water tank and the ventilation chamber of the aerosol chamber, the bottom of the overflow water tank is connected with the second slurry discharge pipe through the third valve, the side wall of the overflow water tank is connected with the second water supply pipe through the fourth valve, A water level monitor is provided in the overflow water tank. 3. The new high-efficiency composite wet dust collector for coal mine according to claim 2, characterized in that: the filler dedusting part includes a filler chamber, a filler layer, an upper sieve plate for filler, and a lower sieve plate for filler, and the filler chamber and the The aerosol chamber is connected, the upper and lower sieve plates of the packing are respectively arranged at the upper and lower ends of the packing chamber, and the packing layer is arranged on the upper sieve plate of the packing and the lower sieve plate of the packing Between, a first nozzle is arranged on the upper sieve plate of the filler, and the first nozzle is connected with a first automatic spraying system. 4. The new coal mine high-efficiency composite wet dust collector according to claim 1, characterized in that: the wet vibrating wire grid dedusting part includes a jet chamber, a vibrating wire grid and a vibrating wire grid pipeline, and the jet chamber includes a gas Into the chamber and the ejector, the ejector includes a venturi tube and a second nozzle arranged in the venturi tube, the venturi tube includes a suction chamber, a throat and a diffuser tube that are sequentially connected and integrally formed, so One end of the gas inlet chamber is connected to the upper end of the packing chamber, the other end of the gas inlet chamber is connected to the suction chamber, the diffusion pipe is connected to the vibrating wire grid pipeline, and the second nozzle is connected to There is a second automatic spraying system, the end of the vibrating wire grid pipeline connected to the diffusion pipe 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; Along the wind flow direction, the vibrating wire grid pipeline is provided with a dust removal water bucket and a demist water bucket in sequence from front to back under the vibration wire grid; A fan drain pipe is provided.