A dust suppression system suitable for cold climates

Abstract

This invention proposes a dust suppression system suitable for cold climates, comprising a chemical tank, a water supply pipeline, a mixer, a liquid storage tank, an air compressor, an air storage tank, a foaming tank, and a spraying device. The foaming outlet of the foaming tank is connected to the inlet of the spraying device via a pipeline, and the spraying device is located in the area to be suppressed. The advantages are: the foaming tank uses a low-pressure foaming principle to produce foam, which is then sprayed through spray nozzles to areas prone to dust generation, thereby achieving dust suppression. Simultaneously, since the coal conveyor belt vibrates during operation, it can cause secondary dust generation; the foam can form a continuous "covering film" above the belt, thus providing a continuous dust suppression effect. Due to the poor fluidity of the foam, it will not affect the working environment. By installing a dust detection probe and a spray nozzle at each belt transfer point, individual control of each spray valve is achieved, allowing for optimal dust control with minimal chemical dosage.

Description

Technical Field

[0001] This utility model relates to the field of dust suppression, specifically to a dust suppression system suitable for cold climates. Background Technology

[0002] In the coal chemical and metallurgical industries, most dust suppression equipment for coal products employs wet dust removal and dry fog dust suppression methods. Water mist is sprayed through nozzles onto areas with high dust levels. The water mist collides with the dust particles, combining them into larger particles that then fall to the ground, effectively reducing the amount of dust in the air and achieving dust suppression.

[0003] The above-mentioned dust suppression technologies have the following problems in practical applications:

[0004] The large volume of water used for spraying, coupled with its high fluidity, causes it to flow onto the ground and mix with coal dust to form coal slurry, impacting the working environment. Furthermore, the cold winters in northern regions cause the coal slurry to freeze, exacerbating the harshness of the environment and making it difficult to clean. Additionally, the spraying equipment and pipelines are susceptible to freezing damage, resulting in poor spraying performance, reduced dust suppression efficiency, and increased maintenance frequency and costs. To prevent freezing, the spraying water or related equipment typically needs to be heated, and the equipment and pipelines must be insulated, thus increasing energy consumption and further raising costs. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide a dust suppression system suitable for cold climates.

[0006] This utility model is implemented by the following technical solution:

[0007] A dust suppression system suitable for cold climates includes a chemical tank, a water supply pipeline, a mixer, a liquid storage tank, an air compressor, an air storage tank, a foaming tank, and a spraying device.

[0008] The outlet of the reagent tank and the outlet of the water supply pipeline are both connected to the inlet of the mixer through pipelines. The outlet of the mixer is connected to the inlet of the storage tank through pipelines. The outlet of the storage tank is connected to the inlet of the foaming tank through pipelines.

[0009] The air compressor outlet is connected to the air tank inlet via a pipeline, and the air tank outlet is connected to the foaming tank inlet via a pipeline.

[0010] The foam outlet of the foam-making tank is connected to the inlet of the spraying device via a pipeline, and the spraying device is located in the area to be dust-suppressed.

[0011] Furthermore, it also includes deionized water sources, sodium lauryl polyoxyethylene ether sulfate storage tanks, glycerol storage tanks, propylene glycol storage tanks, sodium dodecylbenzene sulfonate storage tanks, diethylene glycol butyl ether storage tanks, and polyoxyethyl alkyl ether storage tanks.

[0012] The outlets of the deionized water source, the sodium lauryl polyoxyethylene ether sulfate storage tank, the glycerin storage tank, the propylene glycol storage tank, the sodium dodecylbenzene sulfonate storage tank, the diethylene glycol butyl ether storage tank, and the polyoxyethyl alkyl ether storage tank are all connected to the inlet of the mixing tank via pipelines. The outlet of the mixing tank is connected to the inlet of the reagent tank via a pipeline. A stirrer is provided inside the reagent tank.

[0013] Furthermore, metering devices are provided at the outlets of the deionized water source, the sodium lauryl polyoxyethylene ether sulfate storage tank, the glycerol storage tank, the propylene glycol storage tank, the sodium dodecylbenzene sulfonate storage tank, the diethylene glycol butyl ether storage tank, and the polyoxyethyl alkyl ether storage tank.

[0014] Furthermore, flow meters and flow regulating valves are installed on the connecting pipelines between the foaming tank, the air storage tank, and the liquid storage tank; a variable frequency pump is also installed at the outlet of the liquid storage tank.

[0015] Furthermore, the spraying device includes spray heads installed at each dust suppression point in the area to be dusted.

[0016] Furthermore, a dust detection probe is provided at each of the dust suppression points, and a spray valve is provided at the inlet of each of the spray heads; the signal output terminal of each dust detection probe is connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminal of each of the spray valves respectively.

[0017] Furthermore, a pressure sensor is installed inside the air storage tank. The signal output terminal of the pressure sensor is connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminal of the starter motor of the air compressor.

[0018] Furthermore, a liquid level sensor is installed in the storage tank, a drug metering pump is installed on the pipeline connecting the drug tank and the mixer, and a water replenishment solenoid valve and a water replenishment metering pump are installed at the outlet of the water supply pipeline; the signal output terminal of the liquid level sensor is connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminals of the drug metering pump, the water replenishment metering pump, and the water replenishment solenoid valve.

[0019] Advantages of this utility model:

[0020] The foam-making tank utilizes a low-pressure foaming principle to produce foam, which is then sprayed through spray heads onto areas prone to dust generation, thereby achieving dust suppression. Simultaneously, because the coal conveyor belt vibrates during operation, it can cause secondary dust generation; the foam forms a continuous "covering film" above the belt, thus providing a sustained dust suppression effect. Due to the foam's poor flowability, it will not flow onto the ground, minimizing its impact on the working environment. Furthermore, the foam contains antifreeze, preventing freezing even in cold winters in northern regions, thus avoiding environmental impact and damage to the spraying equipment and pipelines. The spraying effect is excellent, with high dust suppression efficiency, reducing maintenance frequency and costs. By installing a dust detection probe and a spray head at each conveyor belt transfer point, individual control of each spray valve is achieved, enabling optimal dust control with minimal reagent usage. 24-hour interlocking control ensures that dust levels remain within safe limits at all times. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the system connection in this embodiment;

[0022] Figure 2 This is the control principle diagram of this embodiment;

[0023] Figure 3 The images shown are taken at magnifications of 500x, 2000x, 10000x, and micrometer scales after 5 minutes of spraying coal powder according to this embodiment.

[0024] In the diagram: 1. Deionized water source; 2. Sodium lauryl polyoxyethylene ether sulfate storage tank; 3. Glycerin storage tank; 4. Propylene glycol storage tank; 5. Sodium dodecylbenzene sulfonate storage tank; 6. Diethylene glycol butyl ether storage tank; 7. Polyoxyethylene ethyl alkyl ether storage tank; 8. Chemical tank; 9. Water supply pipeline; 10. Mixer; 11. Liquid storage tank; 12. Air compressor; 13. Air storage tank; 14. Foaming tank; 15. Spray device; 151. Spray head; 16. Agitator; 19. Metering device; 20. Flow meter; 21. Flow regulating valve; 22. Variable frequency pump; 23. Dust detection probe; 24. Spray valve; 25. Pressure sensor; 26. Liquid level sensor; 27. Chemical metering pump; 28. Water replenishment metering pump; 29. ​​Water replenishment solenoid valve; 30. Controller. Detailed Implementation

[0025] 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.

[0026] Example 1:

[0027] like Figures 1 to 2 The dust suppression system shown is suitable for cold climates and includes a chemical tank 8, a water supply pipeline 9, a mixer 10, a liquid storage tank 11, an air compressor 12, an air storage tank 13, a foaming tank 14, and a spraying device 15. This embodiment also includes a deionized water source 1, a sodium lauryl polyoxyethylene ether sulfate storage tank 2, a glycerol storage tank 3, a propylene glycol storage tank 4, a sodium dodecylbenzene sulfonate storage tank 5, a diethylene glycol butyl ether storage tank 6, and a polyoxyethyl alkyl ether storage tank 7.

[0028] The outlets of deionized water source 1, sodium lauryl polyoxyethylene ether sulfate storage tank 2, glycerin storage tank 3, propylene glycol storage tank 4, sodium dodecylbenzene sulfonate storage tank 5, diethylene glycol butyl ether storage tank 6, and polyoxyethyl alkyl ether storage tank 7 are all connected to the inlet of a mixing tank via pipelines. The outlet of the mixing tank is connected to the inlet of a reagent tank 8 via a pipeline. A stirrer 16 is installed inside the reagent tank 8. Metering devices 19 are installed at the outlets of deionized water source 1, sodium lauryl polyoxyethylene ether sulfate storage tank 2, glycerin storage tank 3, propylene glycol storage tank 4, sodium dodecylbenzene sulfonate storage tank 5, diethylene glycol butyl ether storage tank 6, and polyoxyethyl alkyl ether storage tank 7. The outlet of the reagent tank 8 and the outlet of the water supply pipeline 9 are both connected to the inlet of the mixer 10 via pipelines. The outlet of the mixer 10 is connected to the inlet of the storage tank 11 via a pipeline, and the outlet of the storage tank 11 is connected to the inlet of the foaming tank 14 via a pipeline. The outlet of the air compressor 12 is connected to the inlet of the air storage tank 13 via a pipeline, and the outlet of the air storage tank 13 is connected to the inlet of the foaming tank 14 via a pipeline. The outlet of the foaming tank 14 is connected to the inlet of the spray device 15 via a pipeline. The spray device 15 is located in the area to be dusted. The spray device 15 includes spray heads 151 installed at each dust suppression point in the area to be dusted. A dust detection probe 23 is installed at each dust suppression point, and a spray valve 24 is installed at the inlet of each spray head 151.

[0029] A pressure sensor 25 is installed inside the air storage tank 13, and a liquid level sensor 26 is installed inside the liquid storage tank 11. A reagent metering pump 27 is installed on the pipeline connecting the reagent tank 8 and the mixer 10. A water supply solenoid valve 29 and a water supply metering pump 28 are installed at the outlet of the water supply pipeline 9. A flow meter 20 and a flow regulating valve 21 are installed on the pipeline connecting the foaming tank 14 to the air storage tank 13 and the liquid storage tank 11. A variable frequency pump 22 is also installed at the outlet of the liquid storage tank 11.

[0030] The signal output terminals of each dust detection probe 23, pressure sensor 25, and liquid level sensor 26 are connected to the signal input terminal of the controller 30. The signal output terminals of the controller 30 are respectively connected to the signal input terminals of each spray valve 24, the starter motor of the air compressor 12, the reagent metering pump 27, the water metering pump 28, and the water solenoid valve 29.

[0031] Instructions for use:

[0032] In implementing this embodiment, the amount of each pharmaceutical raw material added to the reagent tank 8 can be controlled by the metering device 19, thereby ensuring that the reagent is prepared according to the predetermined ratio. For solid raw materials, the metering device 19 can be a weighing metering device; for liquid raw materials, the metering device 19 can be a flow metering device. In this embodiment, deionized water, sodium lauryl polyoxyethylene ether sulfate, glycerol, propylene glycol, sodium dodecylbenzenesulfonate, diethylene glycol butyl ether, and polyoxyethyl alkyl ether are added to the reagent tank 8 in a weight ratio of 67.5:12.5:10:5:2:5:5, and the stirrer 16 is started to stir evenly. In the above-mentioned agents, deionized water serves as a solvent and a carrier for other raw materials; sodium lauryl polyoxyethylene ether sulfate acts as an emulsifier, increasing the solubility of substances in water and improving foaming effect; glycerin enhances the wettability of the solution, improving the wettability and duration of foam; the addition of propylene glycol inhibits the foaming process, lowers the freezing point of the system, and thus improves the antifreeze performance of the dust suppressant; sodium dodecylbenzene sulfonate (SDBS) reduces the surface tension of the solution, thereby forming foam; diethylene glycol butyl ether prolongs the foam's durability, thus extending the dust suppression time, improving the dust suppression effect while reducing the amount of agent used; polyoxyethyl alkyl ether effectively increases the viscosity of the agent and improves the foaming effect.

[0033] The high-concentration reagent prepared in reagent tank 8 and the incoming water from water supply pipeline 9 are mixed evenly in mixer 10 at a volume ratio of 1:50-100 through reagent metering pump 27 and water replenishment metering pump 28, and then temporarily stored in storage tank 11. Afterwards, it is transported to foaming tank 14 by variable frequency pump 22, where it is mixed with compressed air from air storage tank 13 at a certain pressure (0.55-0.65MPa). Foam is then produced using the low-pressure foaming principle and sprayed onto the conveyor belt transfer points prone to dust generation through spray nozzles 151, thereby achieving the purpose of dust suppression. Simultaneously, since the coal conveyor belt vibrates during operation, it can also cause secondary dust generation; however, the foam generated in this embodiment has better durability and can form a continuous "covering film" above the belt, thus achieving a continuous dust suppression effect.

[0034] In this embodiment, a dust detection probe 23 and a spray head 151 can be installed at each belt conveyor transfer point. When the detected dust level exceeds 10 mg / m³, a dust detection probe 23 and a spray head 151 will be installed. 3 When the dust concentration at the transfer point is below 10 mg / m³, the corresponding spray valve 24 is opened to perform dust suppression. 3When necessary, the corresponding spray valve 24 is closed. The 24-hour interlock control ensures that dust levels remain within a safe range at all times. Furthermore, individual control of each spray valve 24 allows for optimal dust control with minimal reagent usage.

[0035] The liquid level in the storage tank 11 is interlocked with the reagent metering pump 27, the water replenishment metering pump 28, and the water replenishment solenoid valve 29 via the liquid level sensor 26, maintaining the liquid level in the storage tank 11 at a height of 0.4-0.8m to ensure the spraying requirements are met. The foam generated in this embodiment has good antifreeze properties and can remain unfrozen in an environment of -40℃, making it suitable for use in cold winter environments in northern regions. Only insulation needs to be applied to the water supply pipeline 9 according to the ambient temperature; the other pipelines can be used normally.

[0036] Figure 3 The images shown are taken at 500x, 2000x, 10000x, and micron-level magnifications after spraying coal powder for 5 minutes according to this embodiment. The 500x magnification image shows that the foam evenly covers the coal dust surface in a layered arrangement. The 2000x magnification image shows individual foam particles of varying sizes, which are full and do not disappear. The 10000x magnification image clearly shows that the surface of each individual foam is smooth and delicate, tightly adhering to the coal powder surface, demonstrating its good adhesion and elasticity. The micron-level image shows the interior of a single foam film, revealing a uniform distribution of the reagent components within the foam film, indicating good physical compatibility between the components and stable reagent function.

[0037] To verify the application effect of the embodiment, the dust concentration before and after the dust suppression of the material feed chute in the factory was detected by using an LD-5M explosion-proof dust meter. The time range of the measurement was 7:00-11:30, and the data was recorded once every 30 minutes, for a total of 10 sets of test data (the average value of 3 measurements was taken as the test value at that time point each time). The test results are shown in Table 1.

[0038] Table 1. Detection results and reduction analysis at each time point

[0039]

[0040] As can be seen from the data in Table 1, the average dust concentration in the factory after dust suppression decreased from 70.49 mg / m³ to 2.83 mg / m³ during this period, a reduction of 95.99%, indicating that the dust suppression effect of this embodiment is significant; moreover, the reduction at each time point was above 90%, and the effect was stable without significant fluctuations.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust suppression system suitable for cold climates, characterized in that, Includes reagent tanks, water supply pipelines, mixers, liquid storage tanks, air compressors, air storage tanks, foaming tanks, and spraying devices; The outlet of the reagent tank and the outlet of the water supply pipeline are both connected to the inlet of the mixer through pipelines. The outlet of the mixer is connected to the inlet of the storage tank through pipelines. The outlet of the storage tank is connected to the inlet of the foaming tank through pipelines. The air compressor outlet is connected to the air tank inlet via a pipeline, and the air tank outlet is connected to the foaming tank inlet via a pipeline. The foam outlet of the foam-making tank is connected to the inlet of the spraying device via a pipeline, and the spraying device is located in the area to be dust-suppressed.

2. A dust suppression system suitable for cold climates according to claim 1, characterized in that... It also includes deionized water sources, sodium lauryl polyoxyethylene ether sulfate storage tanks, glycerol storage tanks, propylene glycol storage tanks, sodium dodecylbenzene sulfonate storage tanks, diethylene glycol butyl ether storage tanks, and polyoxyethylene ethyl alkyl ether storage tanks. The outlets of the deionized water source, the sodium lauryl polyoxyethylene ether sulfate storage tank, the glycerin storage tank, the propylene glycol storage tank, the sodium dodecylbenzene sulfonate storage tank, the diethylene glycol butyl ether storage tank, and the polyoxyethyl alkyl ether storage tank are all connected to the inlet of the mixing tank via pipelines. The outlet of the mixing tank is connected to the inlet of the reagent tank via a pipeline. A stirrer is provided inside the reagent tank.

3. A dust suppression system suitable for cold climates according to claim 2, characterized in that, Metering devices are installed at the outlets of the deionized water source, the sodium lauryl polyoxyethylene ether sulfate storage tank, the glycerol storage tank, the propylene glycol storage tank, the sodium dodecylbenzene sulfonate storage tank, the diethylene glycol butyl ether storage tank, and the polyoxyethyl alkyl ether storage tank.

4. A dust suppression system suitable for cold climates according to claim 1, characterized in that, A flow meter and a flow regulating valve are installed on the connecting pipeline between the foaming tank, the air storage tank, and the liquid storage tank; a variable frequency pump is also installed at the outlet of the liquid storage tank.

5. A dust suppression system suitable for cold climates according to claim 1, characterized in that, The spraying device includes spray heads installed at each dust suppression point in the area to be dusted.

6. A dust suppression system suitable for cold climates according to claim 5, characterized in that, A dust detection probe is provided at each of the dust suppression points, and a spray valve is provided at the inlet of each of the spray heads; the signal output terminal of each of the dust detection probes is connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminal of each of the spray valves.

7. A dust suppression system suitable for cold climates according to claim 1, characterized in that, A pressure sensor is installed inside the air storage tank. The signal output terminal of the pressure sensor is connected to the signal input terminal of the controller. The signal output terminal of the controller is connected to the signal input terminal of the starter motor of the air compressor.

8. A dust suppression system suitable for cold climates according to claim 1, characterized in that, A liquid level sensor is installed in the storage tank, and a drug metering pump is installed on the pipeline connecting the drug tank and the mixer. A water supply solenoid valve and a water supply metering pump are installed at the outlet of the water supply pipeline. The signal output terminal of the liquid level sensor is connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminals of the drug metering pump, the water supply metering pump, and the water supply solenoid valve.

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