A dust suppressant spraying and cleaning system for railway coal transportation and wastewater recycling.

Abstract

This invention discloses a dust suppressant spraying and cleaning system for railway coal transportation and a wastewater recovery system. The system includes a spraying assembly, a collection assembly, and a separation assembly. The spraying assembly includes spray pipes and spray heads connected to the spray pipes. The collection assembly includes a collection tank located below the transport path. The separation assembly includes a centrifugal separator, a vacuum distillation unit, and a mixing device. The inlet of the centrifugal separator is connected to the outlet of the collection tank. The first outlet of the centrifugal separator is used to discharge coal dust. The second outlet of the centrifugal separator is connected to the vacuum distillation unit, which is connected to the mixing device. The mixing device is connected to the spray pipes to adjust the concentration of the concentrate and allow the liquid to flow into the spray pipes. This dust suppressant spraying and cleaning system for railway coal transportation reduces water consumption and direct wastewater discharge, lowers operating costs, and improves economic efficiency.

Description

Technical Field

[0001] This utility model relates to the field of railway coal transportation waste liquid recycling technology, specifically, to a dust suppressant spraying and cleaning and wastewater recycling system for railway coal transportation. Background Technology

[0002] Chemical dust suppressants are widely used in coal transportation and other fields due to their high dust suppression efficiency (over 90%). Their main components are biodegradable materials such as polyvinyl alcohol, sodium silicate, and glycerol, which fix dust by forming a high-strength adhesive layer. However, spraying equipment requires regular cleaning, and traditional cleaning methods have two major problems: water waste: a single cleaning requires a large amount of clean water (e.g., cleaning a 50-carriage spraying system requires 2-3 tons of water); and secondary pollution risk: residual dust suppressants (containing polyvinyl alcohol, sodium silicate, etc.) in wastewater may pollute soil and water bodies if directly discharged.

[0003] In related technologies, the cleaning equipment used involves direct flushing and discharge: that is, using high-pressure water guns to flush the equipment, the wastewater is directly discharged into the sewer system without recovering the effective components; manual treatment is inefficient: some companies use sedimentation tanks to collect wastewater, but the residual dust suppressant is difficult to separate due to its high viscosity (the viscosity of polyvinyl alcohol liquid reaches 50-100 mPa·s), and the sedimentation cycle is long, making it impossible to achieve recycling. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose a dust suppressant spraying and cleaning system and wastewater recycling system for railway coal transportation. This dust suppressant spraying and cleaning system and wastewater recycling system for railway coal transportation can reduce water consumption and direct wastewater discharge, meet environmental protection requirements, and at the same time reduce operating costs and improve economic efficiency.

[0006] The dust suppressant spraying and cleaning system and wastewater recovery system for railway coal transportation according to an embodiment of the present invention includes:

[0007] A spray assembly, comprising a spray pipe and a spray head, wherein the spray head is connected to the spray pipe;

[0008] A liquid collection assembly, comprising a liquid collection tank located below the transport road, the liquid collection tank being used to collect dust suppressant wastewater;

[0009] The separation assembly includes a centrifugal separator, a vacuum distillation unit, and a mixing element. The inlet of the centrifugal separator is connected to the outlet of the collection tank. The first outlet of the centrifugal separator is used to discharge suspended coal powder. The second outlet of the centrifugal separator is connected to the vacuum distillation unit to allow the separated mixture to pass into the vacuum distillation unit. The vacuum distillation unit is connected to the mixing element to concentrate the viscous components in the dust suppressant liquid to form a concentrate, which is then passed into the mixing element. The mixing element is connected to the spray pipeline and is used to adjust the concentration of the concentrate and to pass the compounded liquid into the spray pipeline.

[0010] The dust suppressant spraying and cleaning system for railway coal transportation according to this utility model effectively solves the problems of water waste and secondary pollution in traditional cleaning methods by centrally collecting, separating and recycling cleaning wastewater, thus realizing the sustainable use of resources and environmental protection.

[0011] In some embodiments, the cross-sectional area of ​​the liquid collection tank gradually decreases from top to bottom in a horizontal plane.

[0012] In some embodiments, the liquid collection assembly further includes a filter connected between the liquid collection tank and the centrifugal separator.

[0013] In some embodiments, the vacuum distillation unit includes a distillation vessel and a heating element, the distillation vessel being connected between the centrifugal separator and the mixing element, at least a portion of the heating element being disposed within the distillation vessel, the heating element being used to heat the liquid within the distillation vessel, and the heating temperature being between 110°C and 130°C.

[0014] In some embodiments, the mixing assembly includes a mixing tank and a water tank. The first inlet of the mixing tank is connected to the distillation tank, the first outlet of the mixing tank is connected to the spray pipeline, and the water tank is connected to the second inlet of the mixing tank for introducing water into the mixing tank.

[0015] In some embodiments, the mixing device further includes a stirrer connected to the mixing tank, with a portion of the stirrer placed inside the mixing tank for stirring the liquid inside the mixing tank.

[0016] In some embodiments, the mixing device includes a detection element connected to the mixing tank for detecting the liquid concentration within the mixing tank.

[0017] In some embodiments, the dust suppressant spraying and cleaning and wastewater recycling system for railway coal transportation of this utility model further includes a dust suppressant storage tank, which is connected to the spraying pipeline, and the second outlet of the mixing tank is connected to the dust suppressant storage tank for introducing the compounded liquid into the dust suppressant storage tank.

[0018] In some embodiments, there are multiple spray heads, which are arranged in a matrix, and in the horizontal plane, the projected outlines of the multiple spray heads are all located within the projected outline of the top opening of the liquid collection tank. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a dust suppressant spraying and cleaning system and wastewater recycling system for railway coal transportation according to an embodiment of this utility model.

[0020] Figure 2 This is a schematic diagram of the spray head arrangement of a dust suppressant spraying and cleaning and wastewater recycling system for railway coal transportation according to an embodiment of this utility model.

[0021] Figure label:

[0022] 1. Spray assembly; 11. Spray piping; 12. Spray head.

[0023] 2. Liquid collection assembly; 21. Liquid collection tank; 22. Filter.

[0024] 3. Separation components; 31. Centrifugal separator; 32. Vacuum distillation components; 321. Distillation vessel; 33. Blending components; 331. Blending tank; 332. Clear water tank.

[0025] 4. Dust suppressant storage tank, Detailed Implementation

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] like Figure 1 and Figure 2 As shown in the figure, the dust suppressant spraying and cleaning and wastewater recovery system for railway coal transportation according to this utility model includes: a spraying component 1, a liquid collection component 2, and a separation component 3.

[0028] The spray assembly 1 includes a spray pipe 11 and a spray head 12, with the spray head 12 connected to the spray pipe 11. The liquid collection assembly 2 includes a liquid collection tank 21, located below the transport road, for collecting dust suppressant wastewater. The separation assembly 3 includes a centrifugal separator 31, a vacuum distillation unit 32, and a mixing element 33. The inlet of the centrifugal separator 31 is connected to the outlet of the liquid collection tank 21. The first outlet of the centrifugal separator 31 is used to discharge suspended coal powder. The second outlet of the centrifugal separator 31 is connected to the vacuum distillation unit 32 to allow the separated mixture to pass into the vacuum distillation unit 32. The vacuum distillation unit 32 is connected to the mixing element 33 to concentrate the viscous components in the dust suppressant liquid to form a concentrate, which is then passed into the mixing element 33. The mixing element 33 is connected to the spray pipe 11 and is used to adjust the concentration of the concentrate and allow the compounded liquid to pass into the spray pipe 11.

[0029] Specifically, such as Figure 1 As shown, the spray assembly 1 can be mounted on a bracket to arrange part of the spray pipes 11 and spray heads 12 above the coal transport road, so that the spray heads 12 can spray dust suppressant towards the transported coal. The collection tank 21 is located below the transport road to collect wastewater (i.e., dust suppressant waste liquid carrying coal, impurities, etc.) flowing down from the transport equipment. The centrifugal separator 31, the vacuum distillation unit 32, and the mixing unit 33 are connected by pipelines, and each corresponding pipeline is equipped with a pump to provide power for the transport of liquid.

[0030] Understandably, the prepared dust suppressant liquid is first sprayed onto the coal conveying equipment using the spray assembly 1. The mixture is then transported through the centrifugal separator 31, the vacuum distillation unit 32, and the mixing unit 33 so that the mixing unit 33 can reconstitute a reusable liquid. The reconstituted liquid can be used as a replenishing liquid for cleaning or dust suppressant liquid based on information such as the concentration of the reconstituted liquid, thereby achieving the reuse of the recovered liquid.

[0031] In other words, the design of the collection tank 21 in the collection component 2 can centrally collect the cleaning wastewater, avoiding secondary pollution caused by direct discharge of wastewater. The centrifugal separator 31 and the vacuum distillation unit 3 of the separation component 3 work together to separate the suspended coal powder and effective dust suppressant components in the wastewater.

[0032] The first outlet of the centrifugal separator 31 discharges pulverized coal, achieving partial recovery of the pulverized coal. The second outlet feeds the separated mixture into the vacuum distillation unit 32, where the viscous components in the dust suppressant liquid are concentrated to form a concentrate. The vacuum distillation unit 32 is connected to the adjusting fitting 33, which is used to adjust the concentration of the concentrate and allows it to be recycled through the spray pipe 11.

[0033] Therefore, the automated cleaning and recycling system reduces manual operation and improves cleaning efficiency. Furthermore, by adjusting the adjusting component 33, the concentrated solution can be reconstituted to a suitable concentration for repeated spraying, reducing the cost of dust suppressants.

[0034] In other words, the dust suppressant spraying and cleaning and wastewater recycling system for railway coal transportation according to this utility model effectively solves the problems of water waste and secondary pollution in traditional cleaning methods by centrally collecting, separating and recycling cleaning wastewater, and realizes the sustainable use of resources and environmental protection.

[0035] In some embodiments, the cross-sectional area of ​​the liquid collection tank 21 gradually decreases from top to bottom in a horizontal plane.

[0036] It is understandable that, such as Figure 1 As shown, the cross-sectional area of ​​the collection tank 21 gradually decreases from top to bottom, forming a conical structure, which helps the wastewater flow and separate better within the collection tank 21. In other words, the conical design of the collection tank 21 causes the wastewater velocity to gradually increase during flow, which helps in the sedimentation and separation of suspended solids. As the wastewater flows downwards, the decreasing cross-sectional area increases the water flow velocity, which helps separate lighter liquids from heavier solid particles.

[0037] In some embodiments, the liquid collection assembly 2 further includes a filter 22 connected between the liquid collection tank 21 and the centrifugal separator 31.

[0038] It is understandable that, such as Figure 1 As shown, filter 22 is installed between collection tank 21 and centrifugal separator 31 to filter larger particles and impurities in wastewater. Specifically, filter 22 captures and removes large particulate impurities from the wastewater, such as coal dust and larger solid particles, preventing these impurities from entering centrifugal separator 31 and affecting the separation effect. After removing larger impurities, the wastewater can flow more smoothly into centrifugal separator 31 for finer separation.

[0039] In other words, filter 22 can remove large particulate impurities from wastewater, making the wastewater entering the centrifugal separator 31 cleaner, thereby improving the efficiency and effectiveness of centrifugal separation. Removing larger solid particles through filtration reduces wear on the centrifugal separator 31 and vacuum distillation unit 32, extending the equipment's service life. Filter 22 also reduces impurities entering subsequent treatment equipment, lowering the equipment's failure rate and maintenance costs.

[0040] In some embodiments, the vacuum distillation unit 32 includes a distillation vessel 321 and a heating element (not shown in the figure). The distillation vessel 321 is connected between the centrifugal separator 31 and the mixing element 33. At least a portion of the heating element is placed inside the distillation vessel 321. The heating element is used to heat the liquid inside the distillation vessel 321, and the heating temperature is between 110°C and 130°C.

[0041] Understandably, the distillation tank 321 is connected between the centrifugal separator 31 and the mixing unit 33 to contain the wastewater to be distilled. The heating element can be partially or entirely placed within the distillation tank 321 to heat the liquid inside. The heating temperature is controlled between 110°C and 130°C to effectively evaporate moisture while avoiding overheating that could decompose the dust suppressant components.

[0042] In other words, the mixture separated by the centrifugal separator 31 enters the distillation tank 321, where it is heated to 110°C–130°C by the heating element. Under vacuum, the water evaporates into steam and is discharged, leaving behind a concentrated dust suppressant liquid. The design of the distillation tank 321 allows for water evaporation, while the dust suppressant components are retained due to temperature control, ultimately forming a concentrated liquid.

[0043] In some embodiments, the mixing component 33 includes a mixing tank 331 and a clean water tank 332. The first inlet of the mixing tank 331 is connected to the distillation tank 321, the first outlet of the mixing tank 331 is connected to the spray pipe 11, and the clean water tank 332 is connected to the second inlet of the mixing tank 331 for introducing clean water into the mixing tank 331.

[0044] Understandably, the mixing tank 331 has two inlets: one connected to the distillation tank 321 for receiving the concentrated dust suppressant; and the other connected to the clean water tank 332 for introducing clean water. The clean water tank 332 is connected to the second inlet of the mixing tank 331 and is used to store clean water for mixing with the concentrated dust suppressant in a specific ratio. The first outlet of the mixing tank 331 is connected to the spray pipe 11 for conveying the mixed dust suppressant liquid to the spray system.

[0045] In other words, the concentrated dust suppressant in the distillation tank 321 flows into the mixing tank 331 and is mixed with clean water introduced from the clean water tank 332 in a predetermined ratio. The mixed dust suppressant liquid flows into the spray pipe 11 through the first outlet of the mixing tank 331 and is finally sprayed onto the coal transport equipment for dust suppression.

[0046] In some embodiments, the mixing device 33 further includes a stirrer (not shown), which is connected to the mixing tank 331 and a portion of the stirrer is placed inside the mixing tank for stirring the liquid in the mixing tank 331.

[0047] Understandably, the agitator is connected to and partially placed inside the mixing tank 331 to agitate the liquid within it. The mixing tank 331 receives the concentrated dust suppressant and water and stores the mixed liquid. The agitator rotates or moves within the mixing tank 331, mechanically mixing the concentrated dust suppressant and water thoroughly. The agitator's design ensures the uniformity of the mixed liquid, preventing uneven concentration.

[0048] In some embodiments, the mixing device 33 includes a detection element connected to the mixing tank 331 for detecting the liquid concentration within the mixing tank 331.

[0049] Understandably, the detection device is installed inside or at the outlet of the mixing tank 331 to detect the concentration of the mixed liquid in real time. The detection device can monitor the concentration of the mixed liquid in the mixing tank 331 in real time and transmit the data to the control system. Based on the concentration data from the detection device, the control system adjusts the rate at which clean water is introduced from the clean water tank 332 into the mixing tank 331 to maintain a stable concentration of the mixed liquid.

[0050] In addition, the detection device can also be electrically connected to the pump at the outlet of the water tank 332, so that the detection device can send a switching command to the pump based on the liquid detection results, thereby realizing the automatic adjustment of the liquid concentration ratio in the regulating tank.

[0051] In some embodiments, the dust suppressant spraying and cleaning and wastewater recycling system for railway coal transportation of this utility model further includes a dust suppressant storage tank 4, which is connected to the spraying pipeline 11. The second outlet of the mixing tank 331 is connected to the dust suppressant storage tank 4 for introducing the compounded liquid into the dust suppressant storage tank 4.

[0052] It is understandable that, such as Figure 1 As shown, the dust suppressant storage tank 4 is connected to the spray pipeline 11 and is used to store and supply the dust suppressant liquid. The second outlet of the mixing tank 331 is connected to the dust suppressant storage tank 4 and is used to introduce the compounded liquid into the storage tank. The compounded liquid in the mixing tank 331, after being detected and adjusted, flows into the dust suppressant storage tank 4 from the second outlet for replenishing the dust suppressant liquid. The liquid in the dust suppressant storage tank 4 can be transported to the spray assembly 1 through the spray pipeline 11 at any time for dust suppression spraying on the coal transportation equipment.

[0053] In addition, if the concentration of the liquid in the mixing tank 331 does not meet the standard of the dust suppressant liquid, it can be used as a cleaning liquid and introduced into the spray pipe 11 to avoid waste of resources.

[0054] In some embodiments, there are multiple spray heads 12, which are arranged in a matrix. In the horizontal plane, the projected outlines of the multiple spray heads 12 are all located within the projected outline of the top opening of the liquid collection tank 21.

[0055] It is understandable that, such as Figure 2 As shown, there are multiple spray heads 12 arranged in a matrix. This matrix distribution ensures uniform coverage of the spray area and avoids dead zones. The projected outlines of all spray heads 12 are located within the projected outline of the top opening of the collection tank 21, ensuring that the sprayed liquid is effectively collected into the collection tank 21.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dust suppressant spraying and cleaning system for railway coal transportation and a wastewater recycling system, characterized in that, include: A spray assembly, comprising a spray pipe and a spray head, wherein the spray head is connected to the spray pipe; A liquid collection assembly, comprising a liquid collection tank located below the transport road, the liquid collection tank being used to collect dust suppressant wastewater; The separation assembly includes a centrifugal separator, a vacuum distillation unit, and a mixing element. The inlet of the centrifugal separator is connected to the outlet of the collection tank. The first outlet of the centrifugal separator is used to discharge suspended coal powder. The second outlet of the centrifugal separator is connected to the vacuum distillation unit to allow the separated mixture to pass into the vacuum distillation unit. The vacuum distillation unit is connected to the mixing element to concentrate the viscous components in the dust suppressant liquid to form a concentrate, which is then passed into the mixing element. The mixing element is connected to the spray pipeline and is used to adjust the concentration of the concentrate and to pass the compounded liquid into the spray pipeline.

2. The dust suppressant spraying and cleaning system for railway coal transportation and wastewater recycling according to claim 1, characterized in that, In a horizontal plane, the cross-sectional area of ​​the liquid collection tank gradually decreases from top to bottom.

3. The dust suppressant spraying and cleaning system and wastewater recovery system for railway coal transportation according to claim 2, characterized in that, The liquid collection assembly also includes a filter connected between the liquid collection tank and the centrifugal separator.

4. The dust suppressant spraying and cleaning system and wastewater recovery system for railway coal transportation according to claim 1, characterized in that, The vacuum distillation unit includes a distillation vessel and a heating element. The distillation vessel is connected between the centrifugal separator and the mixing element. At least a portion of the heating element is placed inside the distillation vessel. The heating element is used to heat the liquid inside the distillation vessel, and the heating temperature is between 110°C and 130°C.

5. The dust suppressant spraying and cleaning system and wastewater recovery system for railway coal transportation according to claim 4, characterized in that, The mixing components include a mixing tank and a water tank. The first inlet of the mixing tank is connected to the distillation tank, and the first outlet of the mixing tank is connected to the spray pipeline. The water tank is connected to the second inlet of the mixing tank for introducing water into the mixing tank.

6. The dust suppressant spraying and cleaning system for railway coal transportation and wastewater recovery system according to claim 5, characterized in that, The mixing component also includes a stirring element, which is connected to the mixing tank and a portion of the stirring element is placed inside the mixing tank for stirring the liquid inside the mixing tank.

7. The dust suppressant spraying and cleaning system for railway coal transportation and wastewater recycling according to claim 6, characterized in that, The mixing device includes a detection element connected to the mixing tank for detecting the liquid concentration within the mixing tank.

8. The dust suppressant spraying and cleaning system for railway coal transportation and wastewater recycling according to claim 7, characterized in that, It also includes a dust suppressant storage tank, which is connected to the spray pipeline, and the second outlet of the mixing tank is connected to the dust suppressant storage tank for introducing the compounded liquid into the dust suppressant storage tank.

9. The dust suppressant spraying and cleaning system for railway coal transportation and wastewater recovery system according to any one of claims 1-8, characterized in that, There are multiple spray heads, which are arranged in a matrix. In the horizontal plane, the projected outlines of the multiple spray heads are all located within the projected outline of the top opening of the liquid collection tank.

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