Coal gangue dehydration device

Abstract

According to the coal gangue dewatering device, the sprayer is arranged above the gangue screen and close to the material input end, coal gangue on the gangue screen is sprayed and washed, dirt attached to the surface of the coal gangue is removed, and meanwhile the air injection device connected with the compressed air storage tank is arranged above the position close to the material output end. According to the device, through cooperative use of the equipment, the coal gangue subjected to spraying washing is blown and dehydrated through compressed air, and the defects that in an existing device and an existing mode, dehydration is not conducted in time after coal gangue water washing medium removal is conducted, and consequently in the coal gangue transportation process, the coal gangue cannot be dehydrated in time, and the coal gangue cannot be dehydrated in time are overcome. And water carried by the coal gangue carries powder gangue to seep from the bottom of a carriage, and a large amount of dust is generated after natural air drying, so that the environment is polluted.

Description

Technical Field

[0001] The present application relates to the technical field of coal transportation, and in particular to a coal gangue dehydration device. Background Art

[0002] After mining, raw coal needs to be sorted to remove the gangue from it and obtain clean coal. Existing methods for raw coal sorting mainly include jigging and heavy medium separation. Heavy medium separation is widely used due to its high sorting accuracy, wide adjustment range of separation density, ease of automatic control, strong adaptability, and wide particle size range. Heavy medium separation is a gravity coal separation method that uses a heavy liquid or heavy suspension with a density greater than water and intermediate between that of coal and gangue as the medium for separation. High-density solid particles are mixed with water to form a two-phase fluid with a certain density and form a suspension. When the raw coal is fed into a separator filled with this suspension, coal with a lower density than the suspension floats, while gangue (or medium coal) with a higher density sinks, achieving density separation. After sorting, clean coal, medium coal, and gangue are obtained. The clean coal, medium coal, and gangue obtained from the separation are all washed and de-mediumed before being centrally processed.

[0003] Gangue is often de-intercalated using water spraying and screening, but this process often results in a high water content in the product. While both fine and medium coal have corresponding dehydration equipment, gangue is often not dehydrated due to its high density and hardness, which can easily damage dehydration equipment. High-density gangue is highly hydrophobic, and during transportation, the moisture carried by the gangue, along with the fine gangue, seeps out of the bottom of the carriage. Natural drying produces a large amount of dust, which pollutes the environment. Utility Model Content

[0004] The present application provides a coal gangue dehydration device to solve the problem in the existing method that the coal gangue is not dehydrated in time after water washing and de-mediation, resulting in the moisture carried by the coal gangue seeping out from the bottom of the car during the transportation of the coal gangue, and a large amount of dust is generated after natural air drying, causing environmental pollution.

[0005] The present application provides a coal gangue dehydration device, comprising a gangue screen, a sprayer suspended above the gangue screen near a material input end, and the sprayer is connected to a washing water storage tank through a water pump;

[0006] An air jet device is suspended above the gangue screen near the material output end. The air jet device is connected to a compressed air storage tank, which is also connected to an air compressor.

[0007] Optionally, a regulating valve and an air flow meter are sequentially provided on the pipeline between the jet device and the compressed air storage tank;

[0008] The regulating valve and the air flow meter are both electrically connected to the controller.

[0009] Optionally, the jet device is further covered with a splash shield;

[0010] The splash guard is arranged vertically, and the lower end is close to the gangue screen.

[0011] Optionally, the gangue screen is also connected to a filter press;

[0012] The filter press is also connected to the washing water storage tank and the filter cake storage bin respectively.

[0013] Optionally, the air injection device includes an air distribution chamber;

[0014] The air distribution silo is set up vertically, and the top is connected to the compressed air storage tank through a pipeline, and multiple nozzles are distributed in an array at the bottom;

[0015] One end of the air jet head is connected to the air distribution bin, and the other end is provided with a porous cover and faces the gangue screen.

[0016] Optionally, a pair of guide plates are symmetrically arranged in the air distribution bin;

[0017] The guide plate includes a curved portion and a horizontal portion. The curved portion is arranged tangentially to the vertical surface and is located below the air inlet of the air distribution bin. The horizontal portion is arranged horizontally, and the other end is close to the inner wall of the air distribution bin.

[0018] A pair of guide plates are arranged with an interval therebetween.

[0019] Optionally, a guide triangle is provided at the top of one end of the curved portion of the guide plate close to the air inlet of the air distribution bin.

[0020] The present application provides a coal gangue dewatering device, which sprays and washes the coal gangue on the gangue screen by arranging a sprayer above the gangue screen near the material input end to remove dirt adhered to the surface of the coal gangue, and at the same time, an air jet device connected to a compressed air storage tank is arranged above the material output end to spray and dehydrate the washed coal gangue. The device of the present application, through the coordinated use of the above-mentioned equipment, blows up and dehydrates the spray-washed coal gangue with compressed air, thereby overcoming the disadvantages of the existing device and the existing method that the coal gangue cannot be dehydrated in time after water washing and dewatering, resulting in the moisture carried by the coal gangue seeping out from the bottom of the car during the transportation of the coal gangue, and a large amount of dust will be generated after natural air drying, causing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic diagram of a gangue dehydration device provided in one embodiment of the present application;

[0023] Figure 2 A schematic diagram of a gangue dehydration device provided in another embodiment of the present application;

[0024] Figure 3 A schematic diagram of a gangue dehydration device provided in yet another embodiment of the present application;

[0025] Figure 4 A schematic diagram of a gangue dehydration device provided in yet another embodiment of the present application;

[0026] Figure 5 A schematic diagram of the three-dimensional structure of an air injection device provided in one embodiment of the present application;

[0027] Figure 6 A schematic diagram of the internal structure of an air injection device provided in another embodiment of the present application;

[0028] Figure 7 A schematic diagram of the internal structure of an injection device provided in yet another embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1. Gangue screen; 2. Sprinkler; 3. Wash water storage tank; 4. Jet device; 5. Compressed air storage tank; 6. Air compressor; 7. Filter press; 8. Filter cake storage bin; 21. Water pump; 40. Splash guard; 41. Air distribution bin; 42. Jet head; 51. Air flow meter; 52. Controller; 100. Control valve; 411. Guide plate; 412. Guide triangle; 421. Perforated cover. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0032] like Figure 1 As shown, the present application provides a gangue dehydration device, comprising a gangue screen 1, a sprayer 2 is suspended above the gangue screen 1 near the material input end, and the sprayer 2 is connected to a washing water storage tank 3 through a water pump 21;

[0033] An air jet device 4 is suspended above the gangue screen 1 near the material output end. The air jet device 4 is connected to a compressed air storage tank 5 , and the compressed air storage tank 5 is also connected to an air compressor 6 .

[0034] During use, the gangue to be processed enters the gangue screen 1 from the material input end of the gangue screen 1. At this time, the water pump 21 is turned on to pump the washing water in the washing water storage tank 3 into the sprayer 2 to spray and rinse the gangue on the gangue screen 1 to wash away the dust attached to the surface of the gangue, and the washed gangue is transported to the material output end of the gangue screen 1.

[0035] When the washed wet gangue on the gangue screen 1 is transported to the vicinity of the jet device 4, the compressed air storage tank 5 is opened to pass the compressed air therein into the jet device 4 and blown downward to blow away the moisture with coal powder on the surface of the wet gangue below the jet device 4 (in this application, the gangue screen 1 can use a vibrating screen, so that the gangue can be turned over during the vibration screening and transportation of the gangue, so that the surface of the gangue can be fully dehydrated and dried), thereby achieving dehydration of the wet gangue. The dehydrated gangue is discharged from the material output end of the gangue screen 1 to the corresponding receiving device for subsequent processing.

[0036] The moisture blown off from the coal gangue can be collected and processed centrally.

[0037] The present application provides a coal gangue dewatering device, which sprays and washes the coal gangue on the gangue screen 1 by arranging a sprayer 2 above the gangue screen 1 near the material input end to remove dirt adhered to the surface of the coal gangue, and at the same time, an injection device 4 connected to a compressed air storage tank 5 is arranged above the material output end to spray and dehydrate the washed coal gangue. The device of the present application, through the coordinated use of the above-mentioned equipment, blows up and dehydrates the spray-washed coal gangue with compressed air, overcoming the disadvantage of the existing method that the coal gangue cannot be dehydrated in time after water washing and demediation, resulting in the moisture carried by the coal gangue seeping out from the bottom of the car during the transportation of the coal gangue, and a large amount of dust will be generated after natural air drying, causing environmental pollution.

[0038] like Figure 2 As shown, optionally, a regulating valve 100 and an air flow meter 51 are further provided in sequence on the pipeline between the jet device 4 and the compressed air storage tank 5;

[0039] The regulating valve 100 and the air flow meter 51 are both electrically connected to the controller 52 .

[0040] In the present application, when in use, when the washed wet gangue on the gangue screen 1 is transported to the vicinity of the injection device 4, the regulating valve 100 is opened to pass the compressed air in the compressed air storage tank 5 into the injection device 4. At the same time, the air flow meter 51 monitors the flow of compressed air in real time and feeds back the data to the controller 52. The controller 52 adjusts the opening of the regulating valve 100 in real time according to the data fed back by the air flow meter 51, thereby controlling the flow of compressed air.

[0041] like Figure 3 As shown, optionally, the jet device 4 is further covered with a splash shield 40;

[0042] The splash shield 40 is vertically arranged, and the lower end thereof is close to the gangue screen 1 .

[0043] In the present application, due to the fast flow rate of compressed air, the moisture on the surface of the gangue will be blown and splashed. The splashing water can be controlled within a certain range under the obstruction of the splash shield 40, reducing the impact of the splashing water on the surrounding environment.

[0044] like Figure 4 As shown, optionally, the gangue screen 1 is also connected to the filter press 7;

[0045] The filter press 7 is also connected to the washing water storage tank 3 and the filter cake storage bin 8 respectively.

[0046] In the present application, the moisture blown off from the gangue falls from the gangue screen 1 and is collected and transported to the filter press 7. After filtration by the filter press 7, a filter cake and a filtrate are obtained. The filtrate can be used as washing water for flushing the gangue and is recycled to the washing water storage tank 3 for recycling; the filter cake contains a large amount of coal powder, which can be recovered and dried for coal doping and coking.

[0047] like Figure 5 As shown, optionally, the air injection device 4 includes an air distribution chamber 41;

[0048] The air distribution bin 41 is vertically arranged, and the top is connected to the compressed air storage tank 5 through a pipeline, and a plurality of air nozzles 42 are distributed in an array at the bottom;

[0049] One end of the air jet head 42 is connected to the air distribution bin 41 , and the other end is provided with a porous cover 421 and faces the gangue screen 1 .

[0050] In the present application, the air distribution chamber 41 can be a rectangular parallelepiped or a prism-shaped structure with a width at the top and a narrowness at the bottom. The length of the air distribution chamber 41 should be close to the width of the gangue screen 1. The air injection head 42 is a truncated cone-shaped cavity structure with both ends connected. This truncated cone-shaped structure enables the compressed air ejected from the air injection head 42 to have a wider distribution surface.

[0051] A porous cover 421 is provided at the bottom of the nozzle 42. This arrangement can disperse the compressed air flow and prevent the occurrence of the undesirable phenomenon of insufficient dehydration caused by the concentration of the air flow.

[0052] During operation, the pipeline passes the compressed air into the air distribution bin 41 from the air inlet of the air distribution bin 41 , and then distributes the compressed air to the air nozzle 42 through the air distribution bin 41 , and finally blows out from the bottom of the air nozzle 42 .

[0053] like Figure 6 As shown, optionally, a pair of guide plates 411 are symmetrically arranged in the air distribution bin 41;

[0054] The guide plate 411 includes a curved portion and a horizontal portion. The curved portion is tangential to the vertical surface and is located below the air inlet of the air distribution bin 41. The horizontal portion is horizontally arranged, and the other end is close to the inner wall of the air distribution bin 41.

[0055] A pair of guide plates 411 are spaced apart from each other.

[0056] In the present application, a pair of guide plates 411 are spaced apart to ensure that sufficient airflow can be output from below the air inlet of the air distribution bin 41 .

[0057] In the present application, when the guide plate 411 is set, its two side surfaces can be connected to the opposite side surfaces of the air distribution bin 41, so that the two guide plates 411 divide the air distribution bin 41 into four connected spaces, namely the air input part above the guide plate 411, the vertical part formed by the interval between the guide plates 411, and the guide space on both sides.

[0058] In the present application, one side of the guide plate 411 may be connected to one side of the air distribution bin 41, and the guide plate 411 may extend toward the opposite side of the air distribution bin 41. This connection method divides the air distribution bin 41 into five interconnected spaces, namely, the air input portion above the guide plate 411, the vertical portion formed by the intervals between the guide plates 411, the guide spaces on both sides, and the space without the guide plates 411 guiding the air. In actual use, the use of the five spaces may be selected according to needs.

[0059] During use, a curved plate (such as Figure 6 and Figure 7 to redirect the airflow.

[0060] In the present application, a portion of the compressed air entering the air distribution bin 41 moves vertically downward from the space between the guide plates 411, moves to both sides of the air distribution bin 41 under the guiding action of the guide plates 411, and finally moves downward. The guiding action of the guide plates 411 can effectively prevent the compressed air entering the air distribution bin 41 from concentrating in the space below the air inlet, and the wind pressure on both sides is too low, resulting in poor dehydration effect.

[0061] like Figure 7 As shown, optionally, a guide triangle 412 is provided at the top of one end of the curved portion of the guide plate 411 close to the air inlet of the air distribution bin 41 .

[0062] In this application, the function of the guide triangle 412 is to divert the incoming compressed air so that a larger amount of air can be diverted through the guide plate 411 and enter the bottom of the air distribution chamber 41, thereby alleviating the adverse consequences of insufficient air flow and low pressure from the nozzles 42 on both sides of the bottom of the air distribution chamber 41. The specific angle of the top of the guide triangle 412 can be adjusted according to actual conditions and will not be detailed here.

[0063] A coal gangue dehydration device, its working process is as follows:

[0064] During use, the gangue to be processed enters the gangue screen 1 from the material input end of the gangue screen 1. At this time, the water pump 21 is turned on to pump the washing water in the washing water storage tank 3 into the sprayer 2 to spray and flush the gangue on the gangue screen 1 to wash away the dust attached to the surface of the gangue, and the washed gangue is transported to the material output end of the gangue screen.

[0065] When the washed wet gangue on the gangue screen 1 is transported to the vicinity of the injection device 4, the regulating valve 100 is opened to pass the compressed air in the compressed air storage tank 5 into the air distribution bin 41 of the injection device 4. At the same time, the air flow meter 51 monitors the flow of compressed air in real time and feeds back the data to the controller 52. The controller 52 adjusts the opening of the regulating valve 100 in real time according to the data fed back by the air flow meter 51, thereby controlling the flow of compressed air.

[0066] A portion of the compressed air entering the air distribution bin 41 moves vertically downward from the space between the guide plates 411 through the guiding effect of the guide triangle 412, and the remaining portion is guided by the guide triangle 412 to the top of the guide plate 411, and moves toward the sides of the air distribution bin 41 under the guiding effect of the guide plate 411, and finally moves downward. The guiding effect of the guide plate 411 can effectively prevent the compressed air entering the air distribution bin 41 from concentrating in the space below the air inlet, and the wind pressure on both sides is too low, resulting in poor dehydration effect. The compressed air passes through the guide plate 411 and enters the nozzle 42 from the bottom of the air distribution bin 41. After being dispersed by the porous cover 421 at the bottom of the nozzle 42, it is blown downward to blow away the moisture with coal powder on the wet surface of the gangue below the nozzle 42 (the gangue screen 1 in this application can be a vibrating screen, so that the gangue can be turned over during the vibration screening and transportation of the gangue, so that the surface of the gangue can be fully dehydrated and dried), thereby dehydrating the wet gangue. In the process of using compressed air to blow and dehydrate the wet gangue, due to the high flow rate of the compressed air, the moisture on the surface of the gangue will be blown and splashed. The splashing water can be controlled within a certain range under the obstruction of the splash shield 40, reducing its impact on the surrounding environment.

[0067] The dehydrated gangue is discharged from the material output end of the gangue screen 1 to a corresponding receiving device for subsequent processing.

[0068] The moisture blown off from the gangue falls from the gangue screen 1 and is collected and transported to the filter press 7. After filtration by the filter press 7, filter cake and filtrate are obtained. The filtrate can be used as washing water for flushing the gangue and is recycled into the washing water storage tank 3 for recycling; the filter cake contains a large amount of coal powder, which can be recovered and dried for coal doping and coking.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gangue dewatering device, comprising a gangue screen (1), characterized in that: A sprayer (2) is suspended above the gangue screen (1) near the material input end, and the sprayer (2) is connected to the washing water storage tank (3) via a water pump (21); An air jet device (4) is suspended above the gangue screen (1) near the material output end. The air jet device (4) is connected to a compressed air storage tank (5), and the compressed air storage tank (5) is also connected to an air compressor (6).

2. The gangue dehydration device according to claim 1, characterized in that: A regulating valve (100) and an air flow meter (51) are also sequentially provided on the pipeline between the jet device (4) and the compressed air storage tank (5); The regulating valve (100) and the air flow meter (51) are both electrically connected to the controller (52).

3. The gangue dehydration device according to claim 1, characterized in that: The jet device (4) is also covered with a splash shield (40); The splash shield (40) is vertically arranged, and its lower end is close to the gangue screen (1).

4. The gangue dehydration device according to claim 1, characterized in that: The gangue screen (1) is also connected to a filter press (7); The filter press (7) is also connected to the washing water storage tank (3) and the filter cake storage bin (8) respectively.

5. The gangue dehydration device according to any one of claims 1 to 4, characterized in that: The air-jet device (4) includes an air distribution chamber (41); The air distribution bin (41) is vertically arranged, and the top is connected to the compressed air storage tank (5) through a pipeline, and a plurality of air jet heads (42) are distributed in an array at the bottom; One end of the air jet head (42) is connected to the air distribution bin (41), and the other end is provided with a porous cover (421) and faces the gangue screen (1).

6. The gangue dehydration device according to claim 5, characterized in that: A pair of guide plates (411) are symmetrically arranged in the air distribution bin (41); The guide plate (411) comprises a curved portion and a horizontal portion, wherein the curved portion is arranged tangentially to the vertical surface and is located below the air inlet of the air distribution bin (41); the horizontal portion is arranged horizontally, and the other end is close to the inner wall of the air distribution bin (41); and a pair of the guide plates (411) are arranged at intervals.

7. The gangue dehydration device according to claim 6, characterized in that: A guide triangle (412) is provided at the top of one end of the curved portion of the guide plate (411) close to the air inlet of the air distribution bin (41).

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