Raw coal wetting device

Abstract

The utility model provides a raw coal wetting device. The raw coal wetting device comprises a swirler, and the liquid output end of the swirler communicates with a main flow pipe through a circulating pump; the main flow pipe is communicated with the branch flow pipe and the medium water tank; the branch pipe is connected with the wetting pipe; at least one thick cutting box is arranged between the branch pipe and the wetting pipe; the output end of the wetting pipe is communicated with the nozzle; a material cone barrel is connected below the nozzle, and a material output end below the material cone barrel is connected with a material input end of the cyclone; a raw coal conveying belt is further arranged above the material cone barrel; the liquid input end of the cyclone is further connected with the medium water tank, and the material output end of the cyclone is further connected with the clean coal receiving box. According to the device disclosed by the invention, at least one coarse intercepting box is arranged on the branch pipe which is conveyed to the wetting pipe, so that large gangues in recycled coal washing water after raw coal is sorted by a cyclone are intercepted and are prevented from entering the nozzle, and the defect that when a traditional raw coal wetting device is used, gangues exist in the recycled water, so that a spray head is blocked is overcome.

Description

Technical Field

[0001] The present application relates to the technical field of raw coal sorting, and in particular to a raw coal wetting device. Background Art

[0002] Before coking, the raw coal needs to be washed and sorted. The gangue and clean coal in the raw coal are separated by hydraulic cyclone sorting. Before sorting, the raw coal needs to be ground into 1-5mm powder for easy sorting. In addition, the coal powder needs to be moistened before cyclone sorting. The main purpose of moistening the raw coal for washing is to make the raw coal loose enough to avoid agglomeration. Because the raw coal for washing is supplied to the spiral in the cyclone for sorting, and the raw coal sorting time in the cyclone is very short, if the raw coal for washing is not wetted well, it will agglomerate. During sorting, in a short time, the agglomerated raw coal has no time to disperse and enters the clean coal together with the low-density material at the spiral in the cyclone, causing the clean coal product to carry gangue, which seriously affects the quality and yield of the clean coal product.

[0003] In order to avoid coal powder agglomeration in production, the coal powder entering the cyclone is moistened by spraying water. In order to save water, the coal washing water after cyclone separation is often used to moisten the coal powder. This method not only saves water, but also allows the residual coal in the coal washing water after cyclone separation to be sorted again. However, since the recycled coal washing water after cyclone separation contains a large amount of coal gangue slag, it is very easy to cause the nozzle for moistening the coal powder to be blocked when it is reused. Utility Model Content

[0004] The present application provides a raw coal wetting device, which is used to solve the problem that when the existing raw coal wetting device is in use, gangue slag exists in the recycled water, causing the nozzle to be blocked.

[0005] The present application provides a raw coal wetting device, comprising a cyclone, wherein a liquid output end of the cyclone is connected to a main flow pipe through a circulation pump;

[0006] The main flow pipe is connected with the branch flow pipe and the medium water tank;

[0007] The branch pipe is connected to the moistening pipe; at least one cutting box is arranged between the branch pipe and the moistening pipe;

[0008] The output end of the wetting tube is connected to the nozzle;

[0009] A material cone barrel is provided below the nozzle, and a material output end below the material cone barrel is connected to a material input end of the cyclone;

[0010] A raw coal conveyor belt is also provided above the material cone barrel;

[0011] The liquid input end of the cyclone is also connected to the medium water tank, and the material output end of the cyclone is also connected to the clean coal receiving box.

[0012] Optionally, a plurality of cut-off boxes connected in series are provided between the branch pipe and the moistening pipe;

[0013] A filter is provided in the cutting box.

[0014] Optionally, the nozzle is a trapezoidal cavity, the cavity of the nozzle gradually contracts from an output end of the box at one end close to the wetting tube, and the output end of the nozzle is a flat slit.

[0015] Optionally, a plurality of drop plates are staggeredly arranged in the material cone barrel, and the drop plates extend downward at a certain angle to the horizontal plane.

[0016] Optionally, the drop plate is hinged to the material cone barrel, and the lower surface of the drop plate is connected to the material cone barrel through an elastic structure.

[0017] Optionally, the upper surface of the drop plate is provided with a plurality of spike protrusions.

[0018] Optionally, an L-shaped baffle is provided above the raw coal conveyor belt;

[0019] One side of the L-shaped baffle is vertically arranged, and the other side is horizontal, and the horizontal side is located above the vertical side.

[0020] The present application provides a raw coal wetting device, which intercepts large pieces of gangue in the recycled coal washing water after the raw coal is sorted by a cyclone by arranging at least one rough cutting box on the branch pipe leading to the wetting pipe, and arranging a filter in the rough cutting box, so as to prevent the gangue from entering the nozzle, thereby overcoming the disadvantage that gangue slag exists in the recycled water during use of the traditional raw coal wetting device, which causes the nozzle to be clogged. In the present application, a plurality of rough cutting boxes connected in series are arranged between the branch pipe and the wetting pipe to improve the interception efficiency. The filter is the main component for intercepting stones, and the filter can be arranged in multiple layers in the rough cutting box, and the mesh size is reduced layer by layer along the direction of water flow.

[0021] In the present application, by setting up multiple layers of filter screens, the filtering efficiency can be improved; and the mesh openings of the filter screens are gradually reduced along the direction of water flow, so that the gangue slag in the coal washing water can be intercepted layer by layer according to different sizes, thereby reducing the probability of the filter screen being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 paying any creative work.

[0023] Figure 1 A schematic diagram of a raw coal wetting device provided in one embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a nozzle provided in one embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of a material cone barrel provided in one embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of a drop plate provided in one embodiment of the present application;

[0027] Figure 5 A schematic diagram of a raw coal wetting device provided in another embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1. Cyclone; 2. Circulation pump; 3. Medium water tank; 4. Cutting box; 5. Cone barrel; 6. Raw coal conveyor belt; 7. Clean coal receiving box; 8. L-shaped baffle; 21. Main stream pipe; 22. Branch pipe; 23. Wetting pipe; 24. Nozzle; 41. Filter; 51. Drop plate; 52. Elastic structure; 511. Spike protrusion. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0031] like Figure 1 As shown, the present application provides a raw coal wetting device, comprising a cyclone 1, wherein the liquid output end of the cyclone 1 is connected to a main flow pipe 21 through a circulation pump 2;

[0032] The main flow pipe 21 is connected with the branch flow pipe 22 and the medium water tank 3;

[0033] The branch pipe 22 is connected to the moistening pipe 23; at least one cutting box 4 is arranged between the branch pipe 22 and the moistening pipe 23;

[0034] The output end of the wetting tube 23 is connected to the nozzle 24;

[0035] A material cone barrel 5 is received below the nozzle 24, and a material output end below the material cone barrel 5 is connected to a material input end of the cyclone 1;

[0036] A raw coal conveyor belt 6 is also provided above the material cone barrel 5;

[0037] The liquid input end of the cyclone 1 is also connected to the medium water tank 3 , and the material output end of the cyclone 1 is also connected to the clean coal receiving box 7 .

[0038] When in use, the raw coal conveyor belt 6 conveys the ground raw coal powder from the raw coal silo to the material cone barrel 5, and the raw coal powder falls into the material cone barrel 5 from the output end of the raw coal conveyor belt 6. At the same time, the wetting pipe 23 conveys coal washing water to the nozzle 24, and it is sprayed out in the form of a thin film belt through the slit at the output end of the nozzle 24, and contacts the raw coal powder falling into the material cone barrel 5 to wet the raw coal powder.

[0039] The wetted coal powder enters the cyclone 1 from the bottom of the cone barrel 5, and the raw coal powder is subjected to cyclone separation by water supplied from the medium water tank 3. The clean coal after cyclone separation by the cyclone 1 enters the clean coal receiving box 7 for temporary storage and processing in the next stage. The coal washing water containing coal gangue obtained after separation is transferred to the medium water tank 3 for precipitation through the circulation pump 2 (such as a slurry pump) through the main pipe 21, and the other part is sent to the rough box 4 through the branch pipe 22. The large pieces of crushed stones mixed in the water are intercepted by the filter screen in the rough box 4, and then the purified water is sent to the wetting pipe 23 for wetting the raw coal powder.

[0040] The water containing coal gangue in the medium water tank 3 is fed to the cyclone 1 for reuse after sedimentation.

[0041] The present application provides a raw coal wetting device, which intercepts large pieces of gangue in the recycled coal washing water after the raw coal is sorted by the cyclone 1 by arranging at least one rough cutting box 4 on the branch pipe 22 that is fed to the wetting pipe 23, and prevents the gangue from entering the nozzle 24, thereby overcoming the disadvantage of the traditional raw coal wetting device that when in use, gangue slag exists in the recycled water, causing the nozzle to be blocked.

[0042] Alternatively, if Figure 1 As shown, a plurality of cut-off boxes 4 are arranged in series between the branch pipe 22 and the moistening pipe 23;

[0043] A filter screen 41 is arranged in the cut box 4 .

[0044] In the present application, a plurality of cut-off boxes 4 connected in series are arranged between the branch pipe 22 and the moistening pipe 23 to improve the interception efficiency. The filter screen 41 is the main component for intercepting stones. The filter screen 41 can be arranged in multiple layers in the cut-off box 4, and the mesh size is gradually reduced along the water flow direction.

[0045] In the present application, by setting up multiple layers of filter screens 41, the filtering efficiency can be improved; and the mesh openings of the filter screens are gradually reduced along with the direction of water flow, so that the gangue slag in the coal washing water can be intercepted layer by layer according to different sizes, thereby reducing the probability of the filter screen being blocked.

[0046] Alternatively, if Figure 2 As shown, the nozzle 24 is a trapezoidal cavity, the cavity of the nozzle 24 gradually shrinks from one end close to the wetting tube 23 to the output end, and the output end of the nozzle 24 is a flat slit.

[0047] In the present application, the nozzle 24 is configured to be flat as described above, so that the sprayed water is in the form of a belt-shaped water film, so as to have a wider spreading surface, thereby improving the wetting rate of the coal powder.

[0048] Alternatively, if Figure 1 and Figure 3 As shown, a plurality of drop plates 51 are staggeredly arranged in the material cone barrel 5, and the drop plates 51 extend downward at a certain angle to the horizontal plane.

[0049] In the present application, since part of the raw coal powder will accumulate into clumps after being moistened with water, affecting the subsequent cyclone separation, a drop plate 51 is provided. When the coal powder falls, the clumps of coal powder can be broken up by colliding with the drop plate 51 to avoid affecting the subsequent cyclone separation process.

[0050] Alternatively, if Figure 3 As shown, the drop plate 51 is hinged to the material cone barrel 5 , and the lower surface of the drop plate 51 is connected to the material cone barrel 5 via an elastic structure 52 .

[0051] In the present application, the drop plate 51 is hinged to the material cone barrel 5, and the lower surface of the drop plate 51 is connected to an elastic structure 52 (the elastic structure 52 in the present application is a spring or elastic rubber structure). The existence of the elastic structure 52 can play a buffering role, and when the impact force between the wetted coal powder and the drop plate 51 is too large, the rebound force generated by the elastic structure 52 can also act on the drop plate 51, thereby playing a secondary role in breaking up the coal powder clumps.

[0052] Alternatively, if Figure 4 As shown, the upper surface of the drop plate 51 is provided with a plurality of spike protrusions 511 .

[0053] In the present application, a plurality of spike protrusions 511 are provided on the upper surface of the drop plate 51 to enhance the effect of breaking up coal powder agglomerates.

[0054] Alternatively, if Figure 5 As shown, an L-shaped baffle 8 is provided above the raw coal conveyor belt 6;

[0055] One side of the L-shaped baffle 8 is vertically arranged, and the other side is horizontal, and the horizontal side is located above the vertical side.

[0056] In the present application, the L-shaped baffle can block the coal powder and reduce the diffusion of the dust distribution surface.

[0057] A raw coal wetting device, the use process of which is as follows:

[0058] When in use, the raw coal conveyor belt 6 conveys the ground raw coal powder from the raw coal silo to the material cone barrel 5, and the raw coal powder falls into the material cone barrel 5 from the output end of the raw coal conveyor belt 6. The L-shaped baffle 8 can block the coal powder and reduce the spread of dust. At the same time, the wetting pipe 23 conveys the coal washing water intercepted and purified by the filter screen 41 in the roughing box 4 to the nozzle 24, and sprays it in a thin film belt through the slit at the output end of the nozzle, and contacts with the raw coal powder falling into the material cone barrel 5, and wets the raw coal powder. Some of the wetted coal powder will clump, and in the process of falling, these wetted coal powders will fall on the drop plate 51. The coal powder that has clumps will be broken up by hitting the drop plate 51 and the spike protrusions 511 on the drop plate 51. In the process of the wetted coal powder hitting the drop plate 51, since the drop plate 51 is hinged to the material cone barrel 5, and the lower surface of the drop plate 51 is connected with the elastic structure 52 (the elastic structure 52 in the present application is a spring or elastic rubber structure), the existence of the elastic structure 52 can play a buffering role, and when the impact force between the wetted coal powder and the drop plate 51 is too large, the rebound force generated by the elastic structure 52 can also act on the drop plate 51, thereby playing a secondary role in breaking up the coal powder clumps.

[0059] The wet coal powder is broken up by the impact of multiple drop plates 51 in the material cone barrel 5, and enters the cyclone 1 from the bottom of the material cone barrel 5, and the raw coal powder is subjected to cyclone separation by the water supplied by the medium water tank 3. The clean coal after cyclone separation by the cyclone 1 enters the clean coal receiving box 7 for temporary storage and is processed in the next stage. The coal washing water containing coal gangue obtained after separation is transferred to the medium water tank 3 through the main pipe 21 through the circulation pump 2 (such as a slurry pump) for precipitation, and the other part is sent to the rough box 4 through the branch pipe 22, and the large pieces of crushed stones mixed in the water are intercepted by the filter screen 41 in the rough box 4, and then the water purified by the filter screen 41 is sent to the wetting pipe 23 for wetting the raw coal powder.

[0060] The water containing coal gangue in the medium water tank 3 is fed to the cyclone 1 for reuse after sedimentation.

[0061] 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 it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A raw coal wetting device, characterized in that: It comprises a cyclone (1), wherein the liquid output end of the cyclone (1) is connected to a main flow pipe (21) via a circulation pump (2); The main flow pipe (21) is connected to the branch flow pipe (22) and the medium water tank (3); The branch pipe (22) is connected to the moistening pipe (23); at least one cutting box (4) is arranged between the branch pipe (22) and the moistening pipe (23); The output end of the wetting tube (23) is in communication with the nozzle (24); A material cone barrel (5) is supported below the nozzle (24), and a material output end below the material cone barrel (5) is connected to a material input end of the cyclone (1); A raw coal conveyor belt (6) is also provided above the material cone barrel (5); The liquid input end of the cyclone (1) is also connected to the medium water tank (3), and the material output end of the cyclone (1) is also connected to the clean coal receiving box (7).

2. The raw coal wetting device according to claim 1, characterized in that: A plurality of cut-off boxes (4) are arranged between the branch pipe (22) and the moistening pipe (23); A filter screen (41) is arranged in the cutting box (4).

3. The raw coal wetting device according to claim 1, characterized in that: The nozzle (24) is a trapezoidal cavity, the cavity of the nozzle (24) gradually shrinks from the output end of the end box close to the wetting tube (23), and the output end of the nozzle (24) is a flat slit.

4. The raw coal moistening device according to claim 1, characterized in that: A plurality of drop plates (51) are arranged in a staggered manner in the material cone barrel (5), and the drop plates (51) extend downwardly at a certain angle to the horizontal plane.

5. The raw coal moistening device according to claim 4, characterized in that: The drop plate (51) is hinged to the material cone barrel (5), and the lower surface of the drop plate (51) is connected to the material cone barrel (5) via an elastic structure (52).

6. The raw coal moistening device according to claim 5, characterized in that: The upper surface of the drop plate (51) is provided with a plurality of spike protrusions (511).

7. The raw coal moistening device according to any one of claims 1 to 6, characterized in that: An L-shaped baffle (8) is arranged above the raw coal conveyor belt (6); One side of the L-shaped baffle (8) is vertically arranged, and the other side is horizontal, and the horizontal side is located above the vertical side.

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