Coal mine belt conveying straight pump rotary type foam dust falling device and method

Abstract

The invention discloses a coal mine belt conveying straight pump rotary type foam dust falling device and method. The device comprises a nozzle, an air inlet pipe, a mixing chamber, a rotary foaming chamber and a diffusion pipe. The upper end of the nozzle is provided with a foam liquid inlet for feeding foam liquid with a mixed proportion, and the lower end of the nozzle is embedded into the mixing chamber; the air inlet pipe is used for conveying compressed air, and one end of the air inlet pipe is communicated into the cavity of the mixing chamber; the mixing chamber is used for fully mixing foam liquid and compressed air to form mixed gas liquid; the rotary foaming chamber is connected with the lower end of the mixing chamber, and the inner diameter of the rotary foaming chamber is smaller than that of the mixing chamber; the diffusion pipe is connected with the lower end of the rotary foaming chamber, the inner diameter of the inner wall is gradually increased from the position to the tail end, and foamed foam is ejected from the tail end of the diffusion pipe. The device is simple in structure, convenient to install and high in dust falling efficiency, and the foaming degree can be adjusted according to actual scenes.

Description

[Technical field]

[0001] The invention belongs to the field of coal mine safety and environmental protection, and in particular relates to a rotary foam dust reduction device and method for a direct pump used in a coal mine belt transport. [Background technology]

[0002] Coal mine belt transportation has the advantages of high efficiency, long transportation distance, low power consumption, simple structure, stable and reliable operation, and convenient operation, and is widely used. When coal falls from a transportation link to the belt, due to the impact caused by the drop, as well as the vibration during transportation, friction and collision, the coal particles fall off the coal blocks and the coal is broken into smaller particles. These particles will fly under the airflow to form coal dust. Underground workers inhale mine dust for a long time, which is very likely to cause pneumoconiosis; coal dust itself will explode under certain conditions and can participate in gas explosions, which is extremely harmful; coal dust enters mechanical equipment, which will cause a certain degree of wear and tear and reduce the service life of the instrument.

[0003] At present, the mainstream method for dust reduction in coal mine belt transportation is spray dust reduction. The method of spray dust reduction is to arrange the spray water pipe on the bracket on the side of the belt, or hang it on the transport belt. Spray dust removal uses the atomization effect of water. When the water is atomized into tiny water droplets, these water droplets collide with dust particles in the air. After the water droplets adsorb the dust particles, they will fall due to gravity, thereby bringing the dust particles to the ground and achieving the purpose of dust removal. However, for tiny particles (such as particles with a particle size of less than 1 micron), the effect of spray dust removal is limited. Because small particles of dust have more intense Brownian motion, they are not easily captured by water droplets, and the inertia of small particles is small, and the probability of inertial collision with water droplets is relatively low. At the same time, the hydrophobicity of coal dust makes the dust removal efficiency not high in actual application scenarios.

[0004] Foam dust suppression technology: Foam has strong adhesion and can effectively adhere to dust particles. By generating foam to cover the ground or the surface of an object, the wet characteristics of the foam make it difficult for dust particles to fly, thereby reducing the dust concentration in the air. Another significant advantage of foam dust suppression is water saving. Usually, the volume of foam is several times that of liquid water, so the same amount of water can produce more foam and achieve a wider coverage effect. The foaming agent used in foam dust suppression technology is usually a biodegradable material and will not pollute the environment. Especially in areas with high environmental requirements such as mines and construction sites, foam dust suppression technology has become a greener and safer choice. Foam has a certain degree of persistence. After spraying, the foam can last for a period of time on the ground to maintain the dust suppression effect, unlike traditional water spraying, which quickly evaporates or is blown away by the wind. This means that the use of foam dust suppression can reduce the number of frequent water spraying, improve work efficiency, and reduce operating costs. However, the existing foam dust suppression device cannot effectively suppress dust for coal mine belt transportation due to its large foaming device and low flexibility. At the same time, the coal mine belt transportation distance is long, and simply extending the injection pipeline will increase the workload, and the long-distance transportation of foam will make the foam decay faster. [Summary of the invention]

[0005] The present invention proposes a coal mine belt transport direct pump rotary foam dust reduction device and method, which has high dust reduction efficiency and can adjust the degree of foaming according to actual scenarios.

[0006] The technical solution of the present invention to solve the above technical problems is:

[0007] A coal mine belt transport straight pump rotary foam dust reduction device, the device comprises a nozzle, an air inlet pipe, a mixing chamber, a rotary foaming chamber, and a diffusion pipe; the upper end of the nozzle is provided with a foam liquid inlet for receiving a foam liquid mixed in a good proportion, and the lower end of the nozzle is embedded in the mixing chamber; the air inlet pipe is used to convey compressed air, and one end of the air inlet pipe leads to the cavity of the mixing chamber; the mixing chamber is used to fully mix the foam liquid and compressed air to form a mixed gas-liquid; the rotary foaming chamber is connected to the lower end of the mixing chamber, and the inner diameter of the rotary foaming chamber is smaller than the inner diameter of the mixing chamber, so that the mixed gas-liquid rotates and foams; the diffusion pipe is connected to the lower end of the rotary foaming chamber, and the inner diameter of the inner wall gradually increases as the position approaches the end, and the foamed foam is ejected from the end of the diffusion pipe.

[0008] The diameter of the foam liquid inlet is smaller than the connected foam liquid pipeline connecting pipe, and the diameter of the nozzle end becomes smaller as it gets closer to the mixing chamber.

[0009] Wherein, the air inlet pipe is located at the oblique side end of the mixing chamber.

[0010] Among them, the mixing chamber has an impeller built in the cavity, and the impeller is rotatably installed in the mixing chamber cavity through a rotating rod. The impeller is fixed on the side of the cavity that is biased towards the air inlet pipe, and the center line of the nozzle and the extension line of the air inlet pipe can pass through the blades of the impeller, so that the impeller can be driven by the foam liquid stream and compressed air.

[0011] Wherein, a servo motor connected to the impeller rotating rod is arranged on the outside of the mixing chamber, and the servo motor is used to drive the impeller to rotate when the pressure of the compressed air and the foam liquid is insufficient.

[0012] Wherein, a rotator is provided in the rotating foaming chamber, and the outer edge of the rotator is tightly fitted with the inner wall of the rotating foaming chamber.

[0013] The rotator includes a rotating shell, spiral blades, a rotor, and a stator magnet. The spiral blades are fixed to the outer edge of the rotating shell. The rotor is located inside the rotating shell and is connected and fixed to the rotating shell. The stator magnet semi-surrounds the rotor with the rotor as the center. The rotating shell and the spiral blades rotate together to generate a negative pressure zone in the rotating foaming chamber to push the foam forward.

[0014] Wherein, a foaming net is provided at the end of the rotating foaming chamber.

[0015] A coal mine belt transport direct pump rotary foam dust suppression device, the device comprises a nozzle, an air inlet pipe, a mixing chamber, a rotary foaming chamber, and a diffusion pipe; the upper end of the nozzle is provided with a foam liquid inlet for receiving a foam liquid mixed in a good proportion, and the lower end of the nozzle is embedded in the mixing chamber; the air inlet pipe is used to transport compressed air, and one end of the air inlet pipe leads to the cavity of the mixing chamber; the mixing chamber is used to fully mix the foam liquid and the compressed air to form a mixed gas-liquid; the rotary foaming chamber is connected to the lower end of the mixing chamber, and the inner diameter of the rotary foaming chamber is smaller than the inner diameter of the mixing chamber, so that the mixed gas-liquid is rotated and foamed; the diffusion pipe is connected to the lower end of the rotary foaming chamber, and the inner diameter of the inner wall increases as the inner diameter of the inner wall increases. The position gradually increases as it approaches the end, and the foamed foam is ejected from the end of the diffusion tube; a rotator is provided in the rotating foaming chamber, and the outer edge of the rotator is tightly fitted with the inner wall of the rotating foaming chamber; the rotator includes a rotating shell, spiral blades, a rotor, and a stator magnet, the spiral blades are fixed to the outer edge of the rotating shell, the rotor is located inside the rotating shell and is connected and fixed to the rotating shell, the stator magnet semi-surrounds the rotor with the rotor as the center, the rotating shell and the spiral blades rotate together to generate a negative pressure area in the rotating foaming chamber, pushing the foam to spray forward; a foaming net is provided at the end of the rotating foaming chamber.

[0016] A coal mine belt conveyor direct pump rotary foam dust reduction method uses the coal mine belt conveyor direct pump rotary foam dust reduction device as described above, the method comprising: first installing the coal mine belt conveyor direct pump rotary foam dust reduction device; connecting the interface of the air inlet pipe with the compressed air pipe adapter to allow compressed air to enter the device; then connecting the foam liquid inlet and the foam liquid pipeline connecting pipe; adjusting the appropriate angle so that the opening of the diffusion pipe faces the coal dust area; opening the foam liquid pipeline and the compressed air pipeline to allow gas and liquid to enter the mixing chamber of the device; connecting the rotator to rotate the rotor, driving the rotating shell to rotate, and the spiral thin blades on the rotating shell will also rotate together to push the foam to spray forward, and some foam liquid that has not been mixed and foamed will also complete the final foaming under the drive of the foaming net and the rotator and spray to one end of the diffusion pipe.

[0017] Compared with the prior art, the coal mine belt conveyor direct pump rotary foam dust suppression device of the present invention has significant advantages in structure and performance. The device sprays the foam liquid evenly through a well-designed nozzle system, and then fully mixes the gas and liquid with the air in the mixing chamber to ensure that the distribution of the foam liquid is more uniform. Through the rotary motion of the rotating foaming chamber, the gas-liquid mixture is quickly stirred and stable foam is generated. In this process, the foaming multiple is controlled, and finally in the diffusion tube at the end, the generated foam is efficiently sprayed out, widely covering the conveyor belt surface and the surrounding air of the coal mine belt conveyor system, effectively suppressing the spread of dust.

[0018] The present invention has the characteristics of simple structure and easy installation. Compared with traditional dust reduction technology, the installation process is more convenient and the equipment maintenance cost is low. It is particularly suitable for complex coal mine working environment. Its dust reduction effect is remarkable and can achieve efficient dust suppression in the belt conveyor system. Compared with traditional water spray dust reduction, this foam dust reduction technology can bind and settle dust particles more quickly, thereby preventing dust from being raised again, keeping the air fresh and the working environment safe.

[0019] In addition, the device has flexible and diverse driving modes, and can start and adjust the foaming process through physical drive or electric drive. The physical drive mode mainly relies on the mechanical force of the equipment and is suitable for special environments that do not require power support, while the electric drive mode can accurately control the foaming multiple and efficiency of the foam, and is suitable for large-scale continuous operation environments. The two drive modes can be selected according to different actual needs, so that the equipment can perform at its best in various working scenarios.

[0020] Changing the source foaming to the end foaming is an innovation of the present invention. Unlike the traditional source foaming technology, the end foaming can more accurately control the foaming degree and the coverage of the spray. This design allows the equipment to be flexibly adjusted according to the different scenarios of coal mine belt transportation. It can not only provide strong dust reduction in high dust environments, but also save resources and avoid the waste of excessive foam by reducing the foaming multiple when there is less dust. This flexibility not only improves the accuracy of the dust reduction effect, but also gives coal mining enterprises more choices in different seasons and working conditions, and can optimize the use of equipment according to actual needs to achieve the best cost-effectiveness ratio.

[0021] In summary, the coal mine belt transport direct pump rotary foam dust reduction device of the present invention far exceeds the existing technology in dust reduction efficiency, installation convenience, flexibility and adaptability, and has great application prospects. Through the efficient foam dust reduction mechanism, it can effectively reduce dust pollution in coal mine operations, protect the health of workers, meet environmental protection requirements, and provide a more advanced and sustainable dust reduction solution for the coal mining industry.

Brief Description of the Drawings

[0022] Figure 1 It is a cross-sectional view of a coal mine belt transport direct pump rotary foam dust suppression device according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 The usage scenario diagram of the coal mine belt transport direct pump rotary foam dust suppression device is shown;

[0024] Figure 3 for Figure 1 Detailed view of the mixing chamber in the coal mine belt conveyor direct pump rotary foam dust suppression device shown;

[0025] Figure 4 for Figure 1 Detailed view of the rotary foaming chamber in the coal mine belt conveyor direct pump rotary foam dust suppression device shown;

[0026] Figure 5 for Figure 1 An enlarged view of the details of the rotating foaming chamber in the coal mine belt conveyor direct pump rotary foam dust suppression device is shown.

[0027] In the figure: 1-air inlet pipe, 2-servo motor, 3-rotating foaming chamber, 4-foaming net, 5-diffuser, 6-foam liquid inlet, 7-nozzle, 8-mixing chamber, 9-impeller, 10-rotator, 11-compressed air duct, 12-compressed air duct adapter, 13-foam liquid duct, 14-foam liquid duct connecting pipe, 15-rotating rod, 16-rotor housing, 17-stator magnet, 18-rotor, 181-rotor winding column, 182-copper wire of winding column, 183-rotor joint, 184-converter, 185-brush, 19-rotating housing, 20-spiral thin blade, 21-spiral rod. [Specific implementation method]

[0028] Figures 1 to 5 The figure shows the coal mine belt transport direct pump rotary foam dust suppression device of this embodiment, which includes a nozzle 7, an air inlet pipe 1, a mixing chamber 8, a rotary foaming chamber 3, and a diffusion pipe 5.

[0029] When using, the foam liquid needs to be prepared in advance. The main components of the foam liquid include foaming agent, wetting agent, and stabilizer. These three main components are mixed with water in different proportions, and the mixing ratio directly affects the performance of the foam dust reduction. For different scenarios, the three components are also very different. According to the actual situation, the configured foam is pumped to the designated area through the foam liquid pipeline 13. The foam liquid pipeline connection pipe 14 is larger than the caliber of the foam liquid inlet 6, and the foam liquid inlet 6 can be directly connected to the foam liquid pipeline connection pipe 14. Similarly, the same is true for the compressed air pipeline 12, but the compressed air pipeline adapter 12 is smaller than the inner diameter of the compressed air pipeline 11 of the main road. This is designed because under the same pressure, the smaller the inner diameter of the pipeline, the greater the flow rate of the compressed air. This principle is also used on the nozzle 7. As it gets closer to the mixing chamber 8, the caliber of the nozzle 7 is also smaller, and the flow rate of the foam liquid in this section of the nozzle 7 will also increase, which can drive the impeller 9 to rotate while pumping the foam liquid to the foaming chamber, and the compressed air of the air inlet pipe 1 can also drive the impeller 9 to rotate. Since the servo motor 2 can be driven by electricity, the impeller 9 will not stop working due to insufficient pipeline pump pressure. The rotating impeller 9 can mix the foam liquid and the gas. At the same time, due to inertia, the mixed gas and liquid will further enter the rotating foaming chamber 3. There is a rotator 10 in the rotating foaming chamber 3. The structure of the rotator 10 is a spiral rod 21 with a spiral line. The rotator 10 fits tightly with the rotating foaming chamber 3, but does not produce friction. There is also a foaming net 4 at the end of the rotator 10 near the end of the diffusion tube 5. The foaming net 4 can foam the foam liquid that has not been foamed again. All foamed foam liquids will eventually become foam beams and be sprayed out by the diffusion tube 5.

[0030] The details of the mixing chamber and the rotating foaming chamber are as follows: Figure 3 , Figure 4 , Figure 5As shown. The mixing chamber structure diagram mainly includes a rotating rod 15 and an impeller 9. The servo motor 2 can drive the rotating rod 15 to drive the impeller 9 to rotate. The rotating impeller 9 can promote the gas-liquid mixing very well. The mixed foam gas and liquid will foam in the rotating foaming chamber 3. The main structure of the rotating foaming chamber 3 is composed of a rotator 10. The rotation principle of the rotator 10 is based on the interaction between electromagnetic induction and the magnetic field generated by the current passing through the conductor. Inside the spiral rod 21 is the rotating shell 19. The two ends of the rotating shell 19 are connected to the rotor joint 183. The rotation of the rotor 18 will drive the rotating shell 19 to rotate, and the spiral thin blades 20 on the rotating shell 19 will also rotate together. Further inside is the rotor housing 16, which contains two stator magnets 17. The stator magnets 17 are fixed inside the rotor housing 16 and are symmetrically distributed with respect to the central axis of the circle. Inside the area surrounded by the stator magnets 17 is a rotor winding 181, on which there is a winding copper wire 182. When current passes through the brushes 185 and the converter 184 on the rotor, the current generates magnetism after passing through the winding copper wire 182, and the rotor generates a magnetic field, which interacts with the stator magnets 17. According to Ampere's law, a torque (Lorentz force) is generated to cause it to rotate.

[0031] The specific operation method is to first install the coal mine belt transport direct pump rotary foam dust suppression device, connect the interface of the air inlet pipe 1 to the compressed air pipe adapter 12, so that the compressed air can enter the device, then connect the foam liquid inlet 6 to the foam liquid pipeline pipe 14, adjust the appropriate angle, let the opening of the diffusion pipe 5 face the coal dust area, open the foam liquid pipeline 14 and the compressed air pipeline 11, let the gas and liquid enter the mixing chamber of the device, connect the rotator 10, and the rotator 10 transmits current to the copper wire 182 around the column through the brush 185. The copper wire 182 around the column generates magnetism and drives the rotor 18 to rotate under the action of the stator magnet 17. The rotation of the rotor 18 will drive the rotating shell 19 to rotate, and the spiral thin blades 20 on the rotating shell 19 will also rotate together, pushing the foam to spray forward. Some foam liquid that has not been mixed and foamed will also be driven by the foaming net 4 and the rotator 10 to complete the final foaming and spray to one end of the diffusion pipe 5.

[0032] It should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A coal mine belt transport direct pump rotary foam dust suppression device, characterized in that: The device comprises a nozzle, an air inlet pipe, a mixing chamber, a rotating foaming chamber and a diffusion pipe; the upper end of the nozzle is provided with a foam liquid inlet for receiving a foam liquid mixed in a certain proportion, and the lower end of the nozzle is embedded in the mixing chamber; the air inlet pipe is used for conveying compressed air, and one end of the air inlet pipe leads to the cavity of the mixing chamber; the mixing chamber is used for fully mixing the foam liquid and the compressed air to form a mixed gas-liquid; the rotating foaming chamber is connected to the lower end of the mixing chamber, and the inner diameter of the rotating foaming chamber is smaller than the inner diameter of the mixing chamber, so that the mixed gas-liquid rotates and foams; the diffusion pipe is connected to the lower end of the rotating foaming chamber, and the inner diameter of the inner wall gradually increases as the position approaches the end, and the foamed foam is ejected from the end of the diffusion pipe.

2. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 1 is characterized in that: The diameter of the foam liquid inlet is smaller than the connected foam liquid pipeline connecting pipe, and the diameter of the nozzle end becomes smaller as it gets closer to the mixing chamber.

3. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 1 is characterized in that: The air inlet pipe is located at the oblique side end of the mixing chamber.

4. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 1 is characterized in that: The mixing chamber has an impeller built in the cavity. The impeller is rotatably installed in the mixing chamber cavity through a rotating rod. The impeller is fixed on one side of the cavity that is biased towards the air inlet pipe, wherein the center line of the nozzle and the extension line of the air inlet pipe can pass through the blades of the impeller, so that the impeller can be driven by the foam liquid stream and the compressed air.

5. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 4 is characterized in that: A servo motor connected to an impeller rotating rod is arranged on the outside of the mixing chamber. The servo motor is used to drive the impeller to rotate when the pressure of the compressed air and the foam liquid is insufficient.

6. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 1 is characterized in that: A rotator is arranged in the rotating foaming chamber, and the outer edge of the rotator is closely fitted with the inner wall of the rotating foaming chamber.

7. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 6 is characterized in that: The rotator includes a rotating shell, spiral blades, a rotor, and a stator magnet. The spiral blades are fixed to the outer edge of the rotating shell. The rotor is located inside the rotating shell and is connected and fixed to the rotating shell. The stator magnet semi-surrounds the rotor with the rotor as the center. The rotating shell and the spiral blades rotate together to generate a negative pressure area in the rotating foaming chamber to push the foam forward.

8. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 6 is characterized in that: A foaming net is arranged at the end of the rotary foaming chamber.

9. A coal mine belt transport direct pump rotary foam dust suppression device, characterized in that: The device comprises a nozzle, an air inlet pipe, a mixing chamber, a rotating foaming chamber and a diffusion pipe; the upper end of the nozzle is provided with a foam liquid inlet for receiving a foam liquid mixed in a certain proportion, and the lower end of the nozzle is embedded in the mixing chamber; the air inlet pipe is used to convey compressed air, and one end of the air inlet pipe leads to the cavity of the mixing chamber; the mixing chamber is used to fully mix the foam liquid and the compressed air to form a mixed gas-liquid; the rotating foaming chamber is connected to the lower end of the mixing chamber, and its inner diameter is smaller than that of the mixing chamber, so that the mixed gas-liquid rotates and foams; the diffusion pipe is connected to the lower end of the rotating foaming chamber, and the inner diameter of the inner wall gradually increases as the position approaches the end , the foamed foam is ejected from the end of the diffusion tube; a rotator is provided in the rotating foaming chamber, and the outer edge of the rotator is tightly fitted with the inner wall of the rotating foaming chamber; the rotator includes a rotating shell, spiral blades, a rotor, and a stator magnet, the spiral blades are fixed to the outer edge of the rotating shell, the rotor is located inside the rotating shell and is connected and fixed to the rotating shell, the stator magnet semi-surrounds and wraps the rotor with the rotor as the center, the rotating shell and the spiral blades rotate together to generate a negative pressure area in the rotating foaming chamber, pushing the foam to spray forward; a foaming net is provided at the end of the rotating foaming chamber.

10. A coal mine belt transport direct pump rotary foam dust reduction method, characterized in that: Using the coal mine belt conveyor direct pump rotary foam dust reduction device as described in claim 9, the method includes: first installing the coal mine belt conveyor direct pump rotary foam dust reduction device, connecting the interface of the air inlet pipe with the compressed air pipe adapter, so that the compressed air can enter the device; then connecting the foam liquid inlet and the foam liquid pipeline connecting pipe, adjusting the appropriate angle so that the opening of the diffusion pipe faces the coal dust area; opening the foam liquid pipeline and the compressed air pipeline to allow gas and liquid to enter the mixing chamber of the device; connecting the rotator, the rotation of the rotator rotor drives the rotating shell to rotate, and the spiral thin blades on the rotating shell will also rotate together, pushing the foam to spray forward; some foam liquid that has not been mixed and foamed will also complete the final foaming and spray out to one end of the diffusion pipe under the drive of the foaming net and the rotator.

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