Mining foam dust removal device
The integrated design of the mining foam dust removal device utilizes venturi tubes and foaming nets to form dense and uniform micro-foam, solving the problem of poor dust removal effect of existing devices and achieving efficient and stable dust removal effect and low-cost operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2026-03-31
AI Technical Summary
Existing foam dust removal devices are large in size, have uneven foaming, dissipate quickly, are inefficient, and consume a lot of chemicals, resulting in poor dust removal performance.
An integrated foam dust removal device for mining was designed, including a storage tank, a foam generator, and nozzles. Dust suppressant and water are quantitatively introduced into the foam generator through a dosing component. Dense and uniform micro-foams are formed using a venturi tube and a foaming net. The nozzles can be angled to achieve efficient dust capture.
It improves dust removal efficiency, reduces chemical consumption, avoids water accumulation on the ground, and features an adjustable nozzle angle for optimal dust removal. It also increases foaming volume several times, has high stability, and reduces operating costs.
Smart Images
Figure CN224064407U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of dust removal technology, specifically relating to a foam dust removal device for mining. Background Technology
[0002] Mining operations generate significant amounts of dust. Dust floating in the air can cause serious harm to the human body, so dust removal devices are used at mining sites. Foam dust removal is a commonly used method. Existing foam dust removal methods generally achieve dust removal through the good coverage of foam. Water and additives are mixed, foamed by a foaming device, and sprayed onto the dust source to fundamentally prevent dust spread. However, existing foam dust removal devices suffer from problems such as large equipment size, large and uneven foam production, rapid foam dissipation, low foam generation efficiency, and high reagent consumption, resulting in reduced dust removal efficiency and poor dust removal effect in practical use. Therefore, a mining-specific foam dust removal device is needed to solve the above technical problems. Utility Model Content
[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a mining foam dust removal device, including a storage tank and a foam generator. The storage tank has an openable inlet at the top and an openable outlet at the bottom. A drug delivery component is connected to the storage tank, and the drug delivery component is connected to the foam generator via a drug delivery pipe. The storage tank has a water inlet pipe and an air inlet pipe. The outlet of the water inlet pipe is connected to the foam generator and the storage tank via branch pipe one and branch pipe two, respectively. The air inlet pipe is connected to the foam generator. The outlet of the foam generator is connected to a distributor, which has multiple foam outlets. Multiple nozzles are connected to the foam outlets via flexible hoses. Each branch pipe one, branch pipe two, and air inlet pipe is equipped with a switch valve.
[0004] It should be noted that dust suppressant and water can be added to the storage tank in a certain proportion, and then quantitatively and stably introduced into the foam generator through the dosing component. The medicine, water and gas are fully mixed, impacted, dispersed, foamed and the surface tension of water is removed in the foam generator to maximize the surface area of the formed micro foam, which is conducive to capturing dust in the environment. After being sprayed from the nozzle, the foam covers the dust source and prevents the dust from spreading. The dust suppressant consumption is relatively small and the water consumption is greatly reduced, avoiding water accumulation on the ground during the dust suppression process. The combination of nozzle and hose can be adjusted at any angle to achieve the best dust removal effect.
[0005] Preferably, the foam generator includes a housing, which is divided into a mixing section, a foaming section, and a dispersing section along the discharge direction. The mixing section contains a Venturi tube, and the branch pipe and the dosing pipe are connected to the Venturi tube. The foaming section is connected to the air inlet pipe. The foaming section contains a Venturi tube, the inlet end of which is connected to the mixing section. One end of the sidewall of the Venturi tube is covered with air inlet holes. The outlet end of the Venturi tube is connected to the dispersing section. The dispersing section contains multiple foaming nets arranged sequentially along the axial direction. The outlet end of the dispersing section is connected to the distributor.
[0006] It should be noted that after the medicine in the storage tank is thoroughly mixed with water again in Venturi tube one, it enters Venturi tube two. At this time, the gas introduced by the air inlet pipe enters Venturi tube two through the air inlet hole and comes into contact with the medicine to form dense foam. After passing through each foaming net, the foam becomes even denser and more uniform. Finally, it enters the distributor and is guided by each hose to the nozzle for spraying.
[0007] Preferably, the drug delivery assembly includes a feed pump. The feed pump is a pneumatic-hydraulic pump, and the air inlet pipe is connected to the pneumatic-hydraulic pump via a branch pipe.
[0008] Preferably, the discharge end of the dispersion section is further equipped with a filter screen. The filter screen can further disperse the foam, thereby further improving the density and uniformity of the foam. The filter screen is detachably installed at the discharge end of the dispersion section.
[0009] Preferably, the air intake end of the air intake pipe is provided with a gas filter.
[0010] Preferably, the inlet end of the water inlet pipe is equipped with a liquid filter.
[0011] Preferably, the bronchus is equipped with a drug delivery ratio regulating valve.
[0012] This utility model also includes other components that enable the normal operation of a mining foam dust removal device, such as control components for a pneumatic hydraulic pump and control components for nozzles, all of which are conventional technologies in the field. Furthermore, devices or components not limited in this utility model, such as distributors, nozzles, switching valves, venturi tubes, foaming nets, hydraulic pumps, gas filters, liquid filters, and chemical proportioning valves, all employ conventional technologies and equipment in the field.
[0013] Working principle: Dust suppressant and water are added to the storage tank in a certain proportion, and then quantitatively and stably introduced into the foam generator through the dosing component. The drug, water and gas are fully mixed, impacted, dispersed, foamed and the surface tension of water is removed in the foam generator to maximize the surface area of the formed micro foam, which is conducive to capturing dust in the environment. After being sprayed from the nozzle, the foam covers the dust source and prevents the dust from spreading. The dust suppressant consumption is relatively small and the water consumption is greatly reduced, avoiding water accumulation on the ground during the dust suppression process. The combination of nozzle and hose can be adjusted at any angle to achieve the best dust removal effect.
[0014] When the foam generator produces foam, the reagent in the storage tank first enters Venturi tube one and mixes thoroughly with water again before entering Venturi tube two. At this time, the gas introduced through the air inlet enters Venturi tube two through the air inlet hole and comes into contact with the reagent to form dense foam. Then, after passing through each foaming net, the foam becomes even denser and more uniform. Finally, it enters the distributor and is guided by each hose into the nozzle for spraying.
[0015] The beneficial effects of this utility model are: (1) Integrated design, all components are installed on the liquid storage tank, the functional modules are more compact, saving installation space, and through the setting of nozzle and hose, long-distance and short-distance operation can be performed. The nozzle can be adjusted at any angle to achieve the best dust removal effect, with good dust removal effect and high efficiency.
[0016] (2) The consumption of reagents is small, the cost of use is greatly reduced, and the dust-suppressing foam dissipates automatically within 2 hours, which can reduce the dust generated during the secondary transfer and crushing process of raw coal.
[0017] (3) Compared with traditional dust suppression devices, the foaming volume is increased several times, and the foaming is uniform and stable with high foaming efficiency. There will be no "gas leakage" plunger flow, and the output of stable foam flow can quickly wet the dust. The water consumption is greatly reduced, and water accumulation on the ground is avoided during the dust suppression process. Attached Figure Description
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] Figure 1 This is a schematic diagram of the structure of a mining foam dust removal device according to an embodiment of the present utility model;
[0020] Figure 2 for Figure 1 The left view;
[0021] Figure 3 for Figure 1 The right view;
[0022] Figure 4 In Example 1 Figure 1 Top view;
[0023] Figure 5 for Figure 1 A three-dimensional image;
[0024] Figure 6 for Figure 4 A partial sectional view;
[0025] Figure 7 In Example 2 Figure 1 Top view.
[0026] In the diagram: 1. Foam generator; 2. Dosing assembly; 3. Nozzle; 4. Storage tank; 5. Hoses; 6. Liquid filter; 7. Gas filter; 8. Inlet; 9. Dispersion section; 10. Foaming net; 11. Venturi tube II; 12. Mixing section; 13. Drain; 14. Air inlet; 15. Water inlet; 16. Air inlet; 17. Dosing tube; 18. Branch pipe I; 19. Air inlet pipe; 20. Branch pipe II; 21. Distributor; 22. Foam outlet; 23. Filter screen; 24. Bronchial pipe; 25. Dosing ratio regulating valve. Detailed Implementation
[0027] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.
[0028] Example 1
[0029] like Figure 1-6 As shown, this utility model provides a mining foam dust removal device, including a storage tank 4 and a foam generator 1. The storage tank 4 has an openable and closable inlet 8 at the top and an openable and closable outlet 13 at the bottom. The storage tank 4 is connected to a drug delivery component 2, which is connected to the foam generator 1 via a drug delivery pipe 17. The storage tank 4 is equipped with a water inlet pipe and an air inlet pipe 19. The outlet of the water inlet pipe is connected to the foam generator 1 and the storage tank 4 via a branch pipe 18 and a branch pipe 20, respectively. The air inlet pipe 19 is connected to the foam generator 1. The outlet of the foam generator 1 is connected to a distributor 21, which has multiple foam outlets 22. The foam outlets 22 are connected to multiple nozzles 3 via flexible hoses 5. The flexible hoses are spring hoses (similar to the spring hoses connected to shower heads). Each branch pipe 18, branch pipe 20, and air inlet pipe 19 is equipped with a switch valve.
[0030] The foam generator 1 includes a housing, which is divided into a mixing section 12, a foaming section, and a dispersing section 9 along the discharge direction. A venturi tube 1 is provided in the mixing section 12. A branch pipe 18 and a drug delivery pipe 17 are both connected to the venturi tube 1. The foaming section is connected to an air inlet pipe 19. A venturi tube 2 11 is provided in the foaming section. The inlet end of the venturi tube 2 11 is connected to the mixing section 12. The side wall of one end of the venturi tube 2 11 is covered with air inlet holes 14. The outlet end of the venturi tube 2 11 is connected to the dispersing section 9. A plurality of foaming nets 10 are arranged in the dispersing section 9 along the axial direction. The structure of the foaming net is a circular plate covered with through holes. The circular plate is fixed in the dispersing section and matches the dispersing section. The outlet end of the dispersing section 9 is connected to a distributor 21.
[0031] The medicine in the storage tank 4 enters the first venturi tube and is thoroughly mixed with water again before entering the second venturi tube 11. At this time, the gas introduced by the air inlet pipe 19 enters the second venturi tube 11 through the air inlet hole 14 and comes into contact with the medicine, forming dense foam. After passing through each foaming net 10, the foam becomes even denser and more uniform, and finally enters the distributor 21 and is guided by each hose 5 into the nozzle 3 for spraying.
[0032] The drug delivery component 2 is a feed pump. The feed pump is a pneumatic-hydraulic pump. The air inlet pipe is connected to the pneumatic-hydraulic pump through a branch pipe. The model of the feed pump is ZYBQ-5 / 5.
[0033] The discharge end of the dispersion section 9 is also equipped with a filter screen 23. The filter screen 23 can further disperse the foam, further improving the density and uniformity of the foam. The filter screen 23 is detachably installed at the discharge end of the dispersion section 9.
[0034] The air intake end of the air intake pipe 19 is equipped with a gas filter 7. Air enters from the air intake port 16 of the gas filter 7 and enters the air intake pipe 19 after filtration.
[0035] The water inlet pipe is equipped with a liquid filter 6. Water enters from the inlet 15 of the liquid filter 6 and enters the water inlet pipe after filtration.
[0036] The aforementioned gas and liquid filters are all equipped with high-quality vacuum-sintered stainless steel filter elements, which are easy to disassemble, clean, and maintain, extending the service life of the equipment and preventing internal blockage. This is existing technology, and the specific structure and principle of the gas and liquid filters will not be described in detail here. The gas and liquid filters have the same structure and are both model number: TGCC-GL02.
[0037] When using the mining foam dust suppression device in this embodiment, the storage tank can be installed on the tunneling machine for easy adjustment of the foam mixture ratio and device start-up and shutdown. If there is insufficient space on the tunneling machine, it can be installed on the ground. After installation, the air inlet and water inlet of the device are connected to the underground air pipe and water pipe, respectively. Add the dust suppressant concentrate to the storage tank at a 1:3 ratio of dust suppressant to water. Open the valve on branch pipe two to inject water into the storage tank for mixing. Observe the water injection from the inlet until it overflows, then close the valve on branch pipe two. Afterwards, open the valves on branch pipe one and the air inlet pipe (it is recommended to open all valves to approximately 3 / 4 of their positions, depending on the situation) and start the hydraulic pump to begin dust suppression operations. The chemical, water, and gas are thoroughly mixed, impacted, dispersed, foamed, and the surface tension of water is removed in the foam generator to maximize the surface area of the formed micro-foam, which is conducive to capturing dust in the environment. After being sprayed from the nozzle, the foam covers the dust source and prevents the dust from spreading. The dust suppressant consumption is relatively small, and the water consumption is greatly reduced, avoiding water accumulation on the ground during the dust suppression process. The combination of nozzle and hose can be adjusted at any angle to achieve the best dust removal effect.
[0038] The above-mentioned dust removal equipment operates under the following conditions: It is suitable for dust suppression in underground coal mine tunneling, fully mechanized mining faces, roadways, belt conveyor corridors, and surface coal yards. Operating power: compressed air; applicable air pressure: 0.4–0.8 MPa; applicable water pressure: 0.4–1.5 MPa; fluid medium pH: 6–8; rated air pressure: ≥0.5 MPa; rated water pressure: ≥0.5 MPa; air consumption: 50–150 m³ / h. 3 / h, water consumption: 1-2.5m 3 / h, foaming ratio: ≥15 times, foam production: ≥300m³ 3 / h, mixing ratio of dust suppressant to water in the tank: 1:3, tank volume: 200L, maximum dimensions: maximum length 750mm, maximum width 550mm. Equipment weight: 80kg.
[0039] When the microbubble liquid sprayed from the nozzle of the dust removal equipment is applied to coal or material piles, it creates a seamless microbubble body that covers the dust source, fundamentally preventing dust from spreading to the outside. When the microbubble liquid is sprayed into dust-laden air, it forms a large number of foam molecule clusters, increasing their total volume and surface area, thus increasing the collision efficiency with dust particles. Compared to traditional water mist dust suppression, microbubble dust suppression uses less water, avoiding excessive water accumulation on the ground. The liquid film of the microbubble liquid contains a special foaming agent (dust suppressant), which significantly reduces the surface tension of water. The foaming agent (dust suppressant) molecules are adsorbed at the interface between the aqueous solution and dust particles, rapidly changing the wetting properties of the dust and increasing the speed at which the dust is wetted. The foam has excellent adhesion; once dust comes into contact with the microbubbles, it will be quickly adhered to the foam, thereby increasing the adhesion efficiency between the foam and the dust.
[0040] In this embodiment, the overall structure is an integrated design with more compact functional modules, saving installation space. It can be installed on the tunneling machine and moved with it, or it can be installed on the ground. The nozzles are arranged around the tunneling arm, allowing for both long-distance and short-distance operation, making operation more convenient. The consumption of raw materials (dust suppressant) is relatively small. The equipment is connected to the control host and set to consume 3-6 kg of material per hour, significantly reducing operating costs. The dust-suppressing foam automatically dissipates within 2 hours, reducing dust generated during the secondary transfer and crushing of raw coal. It improves the clarity of the tunneling face and increases the tunneling speed. Compared with traditional dust suppression devices, the product's foaming volume is increased several times, and the foaming is uniform and stable, without the "gas leakage" plunger flow, outputting a stable foam flow that quickly wets the dust. The raw materials (dust suppressant) are delivered in a quantitative ratio to mix with water and air, significantly reducing water consumption compared to traditional dust removal methods and avoiding water accumulation on the ground during dust suppression. The nozzles can be adjusted at any angle to achieve the optimal dust removal effect.
[0041] Example 2
[0042] like Figure 1 , 2 As shown in Figures 3 and 7, the difference between this embodiment and Embodiment 1 is that the bronchus 24 is equipped with a drug injection ratio regulating valve 25, model RE-02. The amount of dust suppressant entering the foam generator can be adjusted according to on-site requirements to achieve the best dust suppression effect while avoiding waste of dust suppressant and reducing the cost of dust suppression work.
[0043] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A mine foam dust removal device, comprising a liquid storage tank and a foam generator, the top of the liquid storage tank is provided with an openable and closable medicament inlet, and the bottom of the liquid storage tank is provided with an openable and closable pollution discharge port, characterized in that: The liquid storage tank is connected with a dosing assembly, the dosing assembly is connected with the foam generator through a dosing pipe, the liquid storage tank is provided with a water inlet pipe and an air inlet pipe, the water outlet end of the water inlet pipe is connected with the foam generator and the liquid storage tank through branch pipes one and two respectively, the air inlet pipe is connected with the foam generator, the discharge end of the foam generator is connected with a distributor, the distributor is provided with a plurality of foam outlets, the foam outlets are connected with a plurality of spray heads through hoses, and the branch pipes one and two and the air inlet pipe are all provided with on-off valves.
2. A mine foam dust suppression apparatus according to claim 1, characterised in that: The foam generator comprises a shell, the shell is sequentially divided into a mixing section, a foaming section and a dispersion section along the discharge direction, the mixing section is provided with a venturi pipe one, the branch pipe one and the dosing pipe are connected with the venturi pipe one, the foaming section is communicated with the air inlet pipe, the foaming section is provided with a venturi pipe two, the inlet end of the venturi pipe two is communicated with the mixing section, the side wall of one end of the venturi pipe two is provided with a plurality of air inlet holes, the discharge end of the venturi pipe two is communicated with the dispersion section, a plurality of foaming nets are sequentially arranged in the dispersion section along the axial direction, and the discharge end of the dispersion section is communicated with the distributor.
3. A mine foam dusting device according to claim 1, characterised in that: The dosing assembly comprises a dosing pump, the dosing pump is a pneumatic hydraulic pump, and the air inlet pipe is connected with the pneumatic hydraulic pump through a branch air pipe.
4. A mine foam dust suppression apparatus according to claim 2, characterised in that: The discharge end of the dispersion section is further provided with a filter screen.
5. A mine foam dusting device according to claim 1, characterised in that: The air inlet end of the air inlet pipe is provided with a gas filter.
6. A mine foam dusting device according to claim 1, characterised in that: The water inlet end of the water inlet pipe is provided with a liquid filter.
7. A mine foam dusting apparatus according to claim 3, characterised in that: The branch air pipe is provided with a medicine proportion adjusting valve.