A spray dust-settling system suitable for open-air extremely cold working conditions

Abstract

The utility model discloses a kind of spray dust-settling system suitable for open-air extremely cold working condition, it is related to dust-settling technical field, and it includes: water storage device, heater is equipped inside, heater is used to heat the water in water storage device;Spray assembly, including multiple dry fog nozzles;Liquid drive water pump, through water pipeline respectively with water storage device, spray assembly connection, for pressurized conveying the water in water storage device to dry fog nozzle;Air compressor, through gas pipeline with spray assembly connection, for generating compressed air and conveying it to dry fog nozzle;Electric heat tracing hose, be located outside water pipeline and gas pipeline, for heating water pipeline and gas pipeline;Wherein, dry fog nozzle receives high pressure water and compressed air, and water is atomized into micron grade particles by gas-liquid mixing. The above-mentioned spray dust-settling system suitable for open-air extremely cold working condition can solve the problem of low temperature freezing, ensure the stable operation of spray dust-settling operation under open-air extremely cold working condition.

Description

Technical Field

[0001] This utility model relates to the field of dust suppression technology, and in particular to a spray dust suppression system adapted to extremely cold outdoor working conditions. Background Technology

[0002] In open-pit coal mining, dust control is a critical issue for ensuring safe production, environmental protection, and worker health. Current technologies for dust suppression, such as water truck spraying, suffer from limited coverage, high water consumption, and low safety. While motorized hydraulic spraying systems can be directly integrated into mining equipment, they also consume a lot of water and are prone to freezing and failure in low-temperature environments. Furthermore, traditional spraying systems struggle to maintain normal operation in extremely cold conditions, leading to a significant decrease in dust suppression effectiveness in winter.

[0003] Therefore, there are still shortcomings and deficiencies in the existing technology. How to provide a spray dust suppression system that can adapt to extremely cold outdoor working conditions is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a spray dust suppression system adapted to extremely cold outdoor working conditions, which solves the technical problem that traditional spray systems are difficult to maintain normal operation under extremely cold conditions, resulting in a significant decrease in dust suppression effect in winter.

[0005] To achieve the above objectives, this utility model provides a spray dust suppression system adapted to extremely cold outdoor working conditions, comprising:

[0006] A water storage device, with an internal heater for heating the water in the storage device;

[0007] The spray assembly includes multiple dry fog nozzles;

[0008] A liquid-driven water pump is connected to the water storage device and the spray assembly respectively through a water supply pipeline, and is used to pressurize and deliver the water in the water storage device to the dry fog nozzle.

[0009] An air compressor, connected to the spray assembly via an air supply line, is used to generate compressed air and deliver it to the dry fog nozzle;

[0010] An electric heating hose is installed outside the water supply pipeline and the gas supply pipeline for heating the water supply pipeline and the gas supply pipeline;

[0011] The dry fog nozzle receives high-pressure water and compressed air, and atomizes the water into micron-sized particles through gas-liquid mixing.

[0012] Preferably, the water supply pipeline is equipped with an electromagnetic water valve and a water flow control valve. The electromagnetic water valve is used to control the flow of water in the water supply pipeline, and the water flow control valve is used to control the flow rate of water entering the dry mist nozzle.

[0013] Preferably, the gas supply pipeline is equipped with a pneumatic solenoid valve and a pneumatic flow control valve. The pneumatic solenoid valve is used to control the flow of gas in the gas supply pipeline, and the pneumatic flow control valve is used to control the flow rate of gas entering the dry fog nozzle.

[0014] Preferably, the plurality of dry fog nozzles are connected in parallel.

[0015] Preferably, the system also includes a controller and a dust concentration sensor. The controller is signal-connected to the electromagnetic water valve and the pneumatic solenoid valve, and controls the water flow and air flow based on the signal from the dust concentration sensor.

[0016] Preferably, the water flow control valve and the pneumatic flow control valve are linked by the controller to control the gas-liquid mixing ratio.

[0017] Preferably, the device further includes a temperature sensor located in the water storage device and the water supply pipeline, and the temperature sensor is connected to the controller.

[0018] Preferably, the preset safe range of water temperature in the water storage device and the water supply pipeline is 2℃~40℃.

[0019] Preferably, the electric heat tracing hose includes an inner tube, an electric heat tracing tape, an insulation layer, and an outer protective layer. The electric heat tracing tape is embedded in or wrapped around the outer wall of the inner tube, and the insulation layer wraps around the electric heat tracing tape.

[0020] Compared to the aforementioned background technology, the spray dust suppression system provided by this utility model, adapted to extremely cold outdoor conditions, heats the water in the water storage device using a heater and heats the water and air supply pipelines using an electric heating hose, thus solving the problem of low-temperature freezing and ensuring stable operation of spray dust suppression under extremely cold outdoor conditions. High-pressure water and compressed air are mixed and atomized in the dry fog nozzle to form micron-sized water mist particles. These water mist particles cover the dust and promote its settling, resulting in a better spray dust suppression effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a spray dust suppression system adapted to extremely cold outdoor working conditions provided in an embodiment of the present invention.

[0023] Figure 1 Chinese reference numerals: 1. Water storage device; 101. Heater; 2. Hydraulic pump; 201. Hydraulic motor; 202. Pump head; 203. First overflow valve; 204. Pressure gauge; 3. Dry fog nozzle; 4. Air compressor; 401. Air intake pump; 402. Drive motor; 403. Second overflow valve; 5. Solenoid water valve; 6. Water flow control valve; 7. Pneumatic solenoid valve; 8. Pneumatic flow control valve; 9. First check valve; 10. Throttling valve; 11. Second check valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] This utility model provides a spray dust suppression system adapted to extremely cold open-pit working conditions. The spray dust suppression system is applied to a tracked double-drum mining machine in an open-pit mine. The water in the water storage device 1 is heated by the heater 101, and the water supply pipeline and air supply pipeline are heated by the electric heating hose, which solves the problem of low temperature freezing and ensures the stable operation of spray dust suppression operations under extremely cold open-pit working conditions.

[0027] Please refer to Figure 1 The dust suppression spray system adapted to extremely cold outdoor working conditions provided by this utility model includes:

[0028] The water storage device 1 is equipped with a heater 101 inside, which is used to heat the water in the water storage device 1;

[0029] The spray assembly includes multiple dry fog nozzles 3;

[0030] The liquid-driven water pump 2 is connected to the water storage device 1 and the spray assembly respectively through the water supply pipeline, and is used to pressurize and deliver the water in the water storage device 1 to the dry fog nozzle 3.

[0031] Air compressor 4 is connected to the spray assembly via an air supply line to generate compressed air and deliver it to the dry fog nozzle 3;

[0032] Electric heating hoses are installed outside water and gas pipelines to heat them.

[0033] Among them, the dry fog nozzle 3 receives high-pressure water and compressed air, and atomizes the water into micron-sized particles through gas-liquid mixing.

[0034] In this embodiment, the water storage device 1 is specifically a water tank, and the heater 101 is installed inside the water tank. The heater 101 can be a resistance heater 101 with adjustable power. The liquid-driven water pump 2 is a hydraulically driven water pump, and the dry fog nozzle 3 adopts a dual-fluid structure design. High-pressure water and compressed air enter the dry fog nozzle 3 through the water inlet pipe and the air inlet pipe, respectively. Through the interaction between the high-pressure water and the high-speed airflow, the water is torn into extremely fine particles with a diameter ≤50μm, forming a suspended water mist similar to "dry fog".

[0035] In practical use, the spray dust suppression system can be installed on a tracked double-drum mining machine in an open-pit mine. The water in the water storage device 1 is heated by the heater 101 to prevent the water from freezing in low-temperature environments. The liquid-driven water pump 2 pressurizes the water in the water storage device 1 and delivers it to the dry fog nozzle 3. The air compressor 4 simultaneously provides compressed air to the dry fog nozzle 3. The high-pressure water and compressed air are delivered to the dry fog nozzle 3 through the water supply pipeline and the air supply pipeline, respectively. During the delivery process, the electric heating hose heats the water supply pipeline and the air supply pipeline, thereby heating the high-pressure water and compressed air. The high-pressure water and compressed air are mixed and atomized in the dry fog nozzle 3 to form micron-sized water mist particles. The water mist particles cover the dust and promote its settling, thus achieving the effect of spray dust suppression.

[0036] This setup heats the water in the water storage device 1 through the heater 101 and heats the water and gas pipelines through the electric heating hose, thus solving the problem of low-temperature freezing and ensuring the stable operation of spray dust suppression operations under extremely cold outdoor conditions.

[0037] Specifically, an electric heating hose is a flexible conduit integrating electric heating function. It includes an inner tube, an electric heating tape, an insulation layer, and an outer protective layer. The electric heating tape, made of resistance alloy wire, is embedded or wrapped around the outer wall of the inner tube. It generates heat when energized, achieving heating through heat conduction. The insulation layer wraps around the electric heating tape, using highly insulating materials such as silicone or fluoroplastics to prevent leakage and possesses high-temperature resistance and wear resistance. The outer protective layer is made of UV-resistant, weather-resistant rubber or PVC material, protecting the internal structure from mechanical damage and environmental corrosion.

[0038] In use, the water supply pipeline and the gas supply pipeline are fitted inside the inner tube of the electric heating hose, and the medium in the water supply pipeline and the gas supply pipeline are heated by heat conduction.

[0039] Understandably, the inner tube can be made of corrosion-resistant and high-pressure-resistant rubber or polymer materials. In this case, the inner tube can transport media such as water and gas. The electric heating hose can play the role of water, gas and heating. You can just use the electric heating hose directly without the need for additional water and gas pipelines.

[0040] In some embodiments, please refer to Figure 1 The water supply pipeline is equipped with an electromagnetic water valve 5 and a water flow control valve 6. The electromagnetic water valve 5 is used to control the flow of water in the water supply pipeline, and the water flow control valve 6 is used to control the flow rate of water entering the dry fog nozzle 3. Through the cooperation of the electromagnetic water valve 5 and the water flow control valve 6, the water flow output to the dry fog nozzle 3 is precisely controlled.

[0041] In some embodiments, please refer to Figure 1 The gas supply pipeline is equipped with a pneumatic solenoid valve 7 and a pneumatic flow control valve 8. The pneumatic solenoid valve 7 is used to control the flow of gas in the gas supply pipeline, and the pneumatic flow control valve 8 is used to control the flow rate of gas entering the dry fog nozzle 3. The airflow output to the dry fog nozzle 3 is regulated by the cooperation of the solenoid water valve 5 and the water flow control valve 6.

[0042] In some embodiments, please refer to Figure 1 Multiple dry fog nozzles 3 are connected in parallel. Specifically, the water supply pipeline includes a main water supply pipe and multiple branch water supply pipes connected to the main water supply pipe, and the air supply pipeline includes a main air supply pipe and multiple branch air supply pipes connected to the main air supply pipe. Each dry fog nozzle 3 is connected to one branch water supply pipe and one branch air supply pipe, thereby realizing the parallel connection of multiple dry fog nozzles 3.

[0043] This setup, by connecting multiple nozzles in parallel to form a distributed spray network, ensures that high-dust areas (such as cutting surfaces and transport paths) are fully covered, eliminating dust suppression blind spots. The coordinated spraying of multiple nozzles increases the probability of water mist contact with dust, improving dust suppression efficiency; if one nozzle fails, the remaining nozzles can still maintain some functionality, reducing the risk of downtime.

[0044] Additionally, it should be noted that the electromagnetic water valve 5 and water flow control valve 6 are located on the water supply branch pipe, while the pneumatic solenoid valve 7 and pneumatic flow control valve 8 are located on the air supply branch pipe. That is, the number of electromagnetic water valves 5 and water flow control valve 6, and pneumatic solenoid valves 7 and pneumatic flow control valves 8 are the same as the number of dry fog nozzles 3. Each dry fog nozzle 3 is equipped with a set of electromagnetic water valves 5, water flow control valves 6, pneumatic solenoid valves 7 and pneumatic flow control valves 8.

[0045] This setup allows for the control of parallel nozzles in groups, enabling the spray density and intensity to be adjusted as needed to adapt to different working conditions. For example, in high-dust areas (such as cutting points or blasting points), all dry fog nozzles 3 can be activated; in low-dust areas (such as along transport routes), only some dry fog nozzles 3 can be activated to reduce water consumption.

[0046] In some embodiments, the spray dust suppression system adapted to extremely cold outdoor working conditions provided by this utility model further includes a controller and a dust concentration sensor. The controller is connected to the electromagnetic water valve 5 and the pneumatic solenoid valve 7 by signal, and controls the water flow and air flow according to the signal from the dust concentration sensor.

[0047] In use, the dust concentration sensor collects the dust concentration signal at the work site. When the dust concentration is higher than or equal to a certain value that may affect the health of the workers, the controller controls the electromagnetic water valve 5 and the pneumatic solenoid valve 7 to operate, so that the water and air flow can be unblocked and the dust can be sprayed. When the dust concentration is lower than the above-mentioned specific value, the controller controls the electromagnetic water valve 5 and the pneumatic solenoid valve 7 to close, cut off the water and air flow, and stop the dust spraying operation, thereby reducing water consumption and saving water.

[0048] In some embodiments, the water flow control valve 6 and the pneumatic flow control valve 8 are linked by a controller to control the gas-liquid mixing ratio. The controller is connected to the water flow control valve 6 and the pneumatic flow control valve 8, and the water flow control valve 6 and the pneumatic flow control valve 8 can be adjusted in conjunction with the controller to regulate the water flow and air flow, ensuring the optimal gas-liquid mixing ratio and reducing water consumption.

[0049] In some embodiments, the spray dust suppression system adapted to extremely cold outdoor working conditions provided by the present invention further includes a temperature sensor installed in the water storage device 1 and the water supply pipeline, and the temperature sensor is connected to the controller.

[0050] The preset safe range for water temperature in the water storage device 1 and the water supply pipeline is 2℃~40℃. Temperature sensors are installed in the water storage device 1 and the water supply pipeline. By setting temperature sensors, water temperature data in the water storage device 1 and the water supply pipeline can be continuously collected to monitor the temperature in real time, ensuring that the water temperature is within the preset safe range (such as 2℃~40℃), avoiding extreme low temperatures (causing freezing) or high temperatures (causing equipment overheating), and ensuring stable system operation.

[0051] The controller can be connected to the heater 101 and the electric heating hose. When the temperature sensor detects that the water temperature is close to the freezing point (e.g., below 2°C), the controller automatically starts the electric heating element in the heater 101 and the electric heating hose to heat the water. When the water temperature rises abnormally (e.g., ≥50°C), the controller shuts off the electric heating element in the heater 101 and the electric heating hose to stop heating and prevent equipment damage.

[0052] In addition, the hydraulically driven water pump 2 includes a hydraulic motor 201 and a pump head 202. The hydraulic motor 201 is connected to the pump head 202 via a drive shaft. The hydraulic motor 201 converts the pressure energy of the hydraulic oil into mechanical energy to drive the pump head 202. The pump head 202 is an impeller, and the hydraulic motor 201 drives the impeller to rotate at high speed to generate centrifugal force for pressurization. The impeller is made of stainless steel to avoid low-temperature brittleness; the hydraulic oil is low-temperature hydraulic oil (does not solidify at -45℃); the hydraulic motor 201 can have a built-in electric preheater to ensure low-temperature start-up.

[0053] The outlet of the liquid-driven water pump 2 is equipped with a first overflow valve 203 and a pressure gauge 204. The pressure gauge 204 is used to monitor the output pressure of the liquid-driven water pump 2. By setting the first overflow valve 203, when the pressure gauge 204 detects that the system pressure exceeds the set value (such as the output of the liquid-driven water pump 2 > 12MPa), it will automatically open to release pressure and protect the high-pressure water pipeline.

[0054] A first check valve 9 is installed on the water supply pipeline. By setting the first check valve 9, water is only allowed to flow from the liquid-driven water pump 2 to the dry mist nozzle 3 in one direction, preventing water backflow that could cause the liquid-driven water pump 2 to reverse and damage the equipment. The first check valve 9 is located on the main water supply pipe in the water supply pipeline, close to the liquid-driven water pump 2.

[0055] A throttle valve 10 is also installed on the water supply pipeline. Specifically, the throttle valve 10 is located on the main water supply pipe in the water supply pipeline. By changing the valve opening of the throttle valve 10, the water flow rate can be precisely controlled to avoid excessive consumption. The throttle valve 10 is linked with the water flow control valve 6 to achieve precise control of the water flow rate of the dry mist nozzle 3.

[0056] The air compressor 4 includes an air tank, an air intake pump 401, a compression mechanism, a drive motor 402, and an air filter. The air intake pump 401 draws air into the air tank, and the air filter filters dust from the intake air, protecting internal components. The compression mechanism is located inside the air tank, and the drive motor 402 is connected to the compression mechanism. The compression mechanism is the core component of the air compressor 4. The compression structure includes a piston. The drive motor 402 provides mechanical energy to drive the compression mechanism, and the movement of the piston compresses the air in the air tank to a high-pressure state.

[0057] The outlet of the air compressor 4 is equipped with a second relief valve 403. By setting the second relief valve 403, the pressure will be automatically released when the air pressure exceeds the set value (such as 0.9-1.0MPa), which will prevent the air storage cylinder, pipeline or joint from bursting and play an overpressure protection role.

[0058] A second check valve 11 is provided on the air supply pipeline. By setting the second check valve 11, compressed air is only allowed to flow from the air compressor 4 to the dry fog nozzle 3 in one direction, so as to prevent compressed air backflow.

[0059] Optionally, in some embodiments, the water pressure of the water flow entering the dry fog nozzle 3 is in the range of 5-10 MPa.

[0060] Optionally, in some embodiments, the air pressure of the airflow entering the dry fog nozzle 3 is in the range of 0.3-0.8 MPa.

[0061] High-pressure water provides kinetic energy, forming a high-speed water flow. Compressed air passes through the airflow channel inside the dry fog nozzle 3, mixes with the water flow, and shears it, breaking the water into micron-sized particles. Because of their small size and large surface area, the atomized water droplets can remain suspended for a long time and combine with dust particles, promoting their settling.

[0062] By maintaining the water pressure at 5-10 MPa and the air pressure at 0.3-0.8 MPa, the atomization efficiency and the equipment's pressure resistance are balanced, ensuring atomization stability.

[0063] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0064] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A spray dust suppression system adapted to extremely cold outdoor working conditions, characterized in that, include: A water storage device (1) is provided with a heater (101) inside, which is used to heat the water in the water storage device (1); The spray assembly includes multiple dry fog nozzles (3); The liquid-driven water pump (2) is connected to the water storage device (1) and the spray assembly respectively through the water supply pipeline, and is used to pressurize and transport the water in the water storage device (1) to the dry fog nozzle (3); An air compressor (4) is connected to the spray assembly via an air supply line to generate compressed air and deliver it to the dry fog nozzle (3); An electric heating hose is installed outside the water supply pipeline and the gas supply pipeline for heating the water supply pipeline and the gas supply pipeline; The dry fog nozzle (3) receives high-pressure water and compressed air, and atomizes water into micron-sized particles through gas-liquid mixing.

2. The spray dust suppression system adapted to extremely cold outdoor working conditions according to claim 1, characterized in that, The water supply pipeline is equipped with an electromagnetic water valve (5) and a water flow control valve (6). The electromagnetic water valve (5) is used to control the flow of water in the water supply pipeline, and the water flow control valve (6) is used to control the flow of water entering the dry fog nozzle (3).

3. The spray dust suppression system adapted to extremely cold outdoor working conditions according to claim 2, characterized in that, The gas supply pipeline is equipped with a pneumatic solenoid valve (7) and a pneumatic flow control valve (8). The pneumatic solenoid valve (7) is used to control the flow of air in the gas supply pipeline, and the pneumatic flow control valve (8) is used to control the flow rate of air entering the dry fog nozzle (3).

4. The spray dust suppression system adapted to extremely cold outdoor working conditions according to claim 1, characterized in that, Multiple dry fog nozzles (3) are connected in parallel.

5. The spray dust suppression system adapted to extremely cold outdoor working conditions according to claim 3, characterized in that, It also includes a controller and a dust concentration sensor. The controller is connected to the electromagnetic water valve (5) and the pneumatic solenoid valve (7) by signal. The controller controls the water flow and air flow according to the signal from the dust concentration sensor.

6. The spray dust suppression system adapted to extremely cold outdoor working conditions according to claim 5, characterized in that, The water flow control valve (6) and the pneumatic flow control valve (8) are linked by the controller to control the gas-liquid mixing ratio.

7. The spray dust suppression system adapted to extremely cold outdoor working conditions according to claim 5, characterized in that, It also includes a temperature sensor located in the water storage device (1) and the water supply pipeline, the temperature sensor being connected to the controller.

8. The spray dust suppression system adapted to extremely cold outdoor working conditions according to claim 7, characterized in that, The preset safe range of water temperature in the water storage device (1) and the water supply pipeline is 2℃~40℃.

9. The spray dust suppression system adapted to extremely cold outdoor working conditions according to claim 1, characterized in that, The electric heat tracing hose includes an inner tube, an electric heat tracing tape, an insulation layer, and an outer protective layer. The electric heat tracing tape is embedded in or wrapped around the outer wall of the inner tube, and the insulation layer wraps around the electric heat tracing tape.

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