Coal washing device and medium drainage screen with same
By designing a coal washing device including a spray component and a coal washing tank, combined with a continuous screening process, the problem of low media removal efficiency in the existing technology is solved, and efficient media recovery and production efficiency improvement are achieved.
Patent Information
- Application Number
- CN202420838661.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-22
AI Technical Summary
In the prior art, the demediation efficiency is low, resulting in a decrease in production efficiency.
A coal washing device is designed, which includes a spray component and a coal washing tank. The spray component is arranged above the recessed area of the coal washing tank. Through the action of the spray component, the material is separated from the medium attached to its surface, and then flows out through the discharge end. This device is combined with a series of screening devices to form a continuous demediation screening process.
It effectively improves the media recycling rate, reduces media consumption, reduces equipment size and floor space, and improves production efficiency.
Smart Images
Figure CN222369778U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of media-removing screens, in particular to a coal washing device and a media-removing screen having the same. Background Art
[0002] The main principle of the de-mediating screen is to classify suspended media such as coal powder, iron powder, limestone powder, etc. to achieve the purpose of concentration of the same size. Its basic process is to use the main vibration of the de-mediating screen. The vibration is mechanically driven by the power source to form extrusion, rapid movement, and rapid and continuous shearing movement. If the suspended medium elements are larger than the sieve hole diameter, they will be sheared off due to the shear force of the de-mediating screen, and these elements will be discharged from the sieve hole. After such a process, the screen residue will be purified and the material will be screened out.
[0003] However, it has been found in practice that most of the current media removal screens have poor media removal effects, which greatly reduces production efficiency. Utility Model Content
[0004] The purpose of the present application is to provide a coal washing device and a media removal screen having the same, so as to solve the technical problem of low media removal efficiency in the prior art.
[0005] 1. Technical solution
[0006] To achieve the above-mentioned purpose, the first aspect of the utility model provides a coal washing device, including: a matching spray assembly and a coal washing trough, the spray assembly is arranged above the recessed area of the coal washing trough, and the two sides of the recessed area are arranged as smooth transition areas. Under the action of the spray assembly, the material is separated from the medium attached to its surface and then flows out through the discharge end.
[0007] As one of the optional solutions of the present technical solution, the height of the inlet end of the coal washing chute is greater than the height of the outlet end.
[0008] As one of the optional solutions of the present technical solution, the spray assembly is obliquely arranged in a smooth transition zone close to the feeding end.
[0009] As one of the optional solutions of the present technical solution, the pressure at the outlet of the spray assembly is negatively correlated with the particle size of the material.
[0010] As one of the optional solutions of the present technical solution, the inclination angle of the discharge end of the coal washing chute is positively correlated with the particle size of the material.
[0011] As one of the optional solutions of the present technical solution, the height between the feeding end of the coal washing chute and the plane where the coal retaining dam is located is positively correlated with the particle size of the material.
[0012] As one of the optional solutions of the present technical solution, at least a coal retaining dam is provided at the feeding end of the coal washing chute, and a fixed end of the coal retaining dam is in a straight line with the plane where the feeding end is located.
[0013] As one of the optional solutions of the present technical solution, the wall surface of the free end of the coal retaining dam facing away from the material movement direction is inclined.
[0014] As one of the optional solutions of the present technical solution, the water outlet pipe of the coal washing device is arranged below the coal washing tank and is connected to the water inlet of the spray assembly through a flexible hose.
[0015] To achieve the above-mentioned purpose, the second aspect of the utility model provides a de-mediating screen, comprising: a first screening device, a coal washing device and a second screening device arranged in sequence along the material movement direction, wherein the first screening device, the coal washing device and the second screening device are all connected to the excitation source through a support frame.
[0016] (II) Beneficial effects
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] The utility model provides a coal washing device and a medium-removing screen having the same, comprising: a matching spray assembly and a coal washing trough, wherein the spray assembly is arranged above a recessed area of the coal washing trough, and both sides of the recessed area are arranged as smooth transition areas, so that the material is separated from the medium attached to the surface thereof under the action of the spray assembly, and then flows out through the discharge end; in summary, the combination of the above-mentioned structure can realize the separation of the material from the medium attached to the surface thereof, and effectively improve the medium recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:
[0021] Figure 1 It is a structural schematic diagram of a coal washing tank according to an embodiment of the utility model;
[0022] Figure 2 It is the movement state of materials in the coal washing device;
[0023] Figure 3It is a schematic diagram showing the structure of the media removal screen in an embodiment of the utility model;
[0024] Figure 4 It is a three-dimensional diagram showing a media removal screen according to an embodiment of the utility model.
[0025] In the figure: 1. Spray assembly; 2. Coal washing chute; 3. Coal retaining dam; 4. Support frame; 5. Vibration source; 6. First screening device; 7. Coal washing device; 8. Second screening device; 9. First buffer screen surface; 10. Second buffer screen surface; 11. Material distribution chute; 12. Flushing pipe; 13. Water outlet pipe. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:
[0028] In order to solve the technical problem of low efficiency of medium removal in the prior art, such as Figure 1-Figure 4 As shown, the present application provides a new type of de-mediating screen, specifically comprising: a support frame 4, on which are respectively provided an excitation source 5, a first screening device 6, a coal washing device 7 and a second screening device 8, wherein the excitation source 5 adopts a standard excitation motor or a box-type vibrator, the two are compatible, and maintenance is more convenient, and a linear vibration method is adopted, so that the material running speed is faster and the equipment processing capacity is greater.
[0029] The first screening device 6, the coal washing device 7 and the second screening device 8 are arranged in sequence along the direction of material movement, and are all connected to the excitation source 5, so as to ensure that the first screening device 6, the coal washing device 7 and the second screening device 8 will vibrate synchronously, and form a rapid and continuous shear force to shear the material; preferably, the first screening device 6 is set as an arc screen, and the second screening device 8 is set as a straight screen, so as to ensure that the material flowing out through the discharge end of the first screening device 6 flows into the coal washing device 7 under the action of free fall for coal washing operation.
[0030] Specifically, the coal washing device 7 includes: a spray assembly 1 and a coal washing tank 2 that cooperate with each other, the concave area of the coal washing tank 2 is located on a side close to the first screening device 6, and both sides of the concave area are set as smooth transition areas, preferably, as Figure 1As shown, the height of the feeding end of the coal washing trough 2 is greater than the height of the discharging end, and the spray assembly 1 is tilted in a smooth transition zone close to the feeding end, so that the clean water flowing out through the spray assembly 1 can flush the material falling into the coal washing trough 2, thereby separating the material from the medium attached to its surface, and then flowing into the second screening device 8 through the discharging end; in summary, the use of the above-mentioned structure can enhance the screening effect of the material, effectively improve the medium recovery rate, thereby reducing the medium consumption, while reducing the equipment size and the floor space.
[0031] During operation, the material first enters the first screening device 6 for primary screening. At this time, the shearing movement formed under the action of vibration will shear off the part of the material that is larger than the diameter of the screen hole, thereby completing most of the medium removal operation. After that, the material remaining on the screen surface will continue to flow into the coal washing trough 2 under the action of vibration. When the material passes through the water outlet of the spray component 1, the liquid sprayed by the spray component 1 will flush the material, especially the surface of the material. At this time, under the action of the flushing force, the material will be separated from the medium attached to its surface. Finally, under the action of gravity, the separated material will fall into the recessed area of the coal washing trough 2, and the material will be repeatedly flushed under the impact and vibration of the water flow, thereby achieving further separation of the material and the medium attached to its surface. After that, the separated material will slowly move in the smooth transition area near the discharge end of the coal washing trough 2 until it flows into the second screening device 8 through the discharge end for separation again. The specific material movement direction is as follows: Figure 2 As shown; in summary, the combination of the above structure can ensure the separation effect between the material and the medium attached to its surface, thereby effectively improving the medium recovery rate, reducing medium consumption, and at the same time reducing the size of the equipment and the floor space.
[0032] In another embodiment, the spray assembly 1 is installed above one side near the discharge end of the coal washing trough 2, and its water outlet faces the recessed area of the coal washing trough 2. During operation, under the action of the spray assembly 1, the material will move in a turbulent form in the coal washing trough 2, which on the one hand promotes the separation of the material from the medium attached to its surface, and on the other hand can disturb the material in the coal washing trough 2, thereby improving the cleaning efficiency of the material; specifically, when the material flowing out through the first screening device 6 falls into the recessed area under the action of gravity, at this time, under the water spray pressure of the spray assembly 1, the material will form a vortex-like motion in the recessed area, and finally the material will cross the discharge end of the coal washing trough 2 in the form of a parabola and fall into the second screening device 8.
[0033] According to an embodiment of the utility model, a first buffer screen surface 9 is arranged between the feeding end of the coal washing chute 2 and the first screening device 6, and a second buffer screen surface 10 is arranged between the discharging end of the coal washing chute 2 and the second screening device 8. Exemplarily, the first buffer screen surface 9 and the second buffer screen surface 10 are both linear screens, and the ends of the first buffer screen surface 9 and the second buffer screen surface 10 are both provided with coal retaining dams 3. Specifically, the ends are defined according to the direction of material movement. On the first buffer screen surface 9, the material flows from the first screening surface to the flushing chute, and the end is the side close to the feeding end of the flushing chute; similarly, on the second buffer screen surface 10, the material flows from the flushing chute to the second screening surface, so the end is the side away from the discharging end of the flushing chute; preferably, as Figure 3 As shown, the wall surface of the free end of the coal retaining dam 3 away from the material movement direction is inclined. This design can reduce the resistance of the material when jumping to the free end and improve the jumping effect; specifically, as Figure 3 As shown, the free end of the first coal retaining dam is inclined toward the wall surface of the inlet end of the coal washing chute 2, and the free end of the second coal retaining dam is inclined away from the wall surface of the outlet end of the coal washing chute 2.
[0034] In the above embodiment, at least the feeding end of the coal washing chute 2 is provided with a coal retaining dam 3, and the fixed end of the coal retaining dam 3 is in a straight line with the plane where the feeding end is located, thereby ensuring that the material can smoothly enter the coal washing chute 2 after passing through the first coal retaining dam without any residue at the connection between the two; further, the height between the feeding end of the coal washing chute 2 and the plane where the coal retaining dam 3 is located is positively correlated with the particle size of the material. In other words, the larger the particle size of the material, the higher the above height needs to be, so as to ensure the coal washing effect. Similarly, the smaller the particle size of the material, the lower the above corresponding height needs to be.
[0035] Similarly, on the basis of the above embodiment, in order to further ensure the coal washing effect, the inclination angle of the discharge end of the coal washing trough 2 also needs to be positively correlated with the particle size of the material. In other words, the larger the particle size of the material, the greater the height between the free end of the first coal dam and the bottom of the recessed area of the coal washing trough 2 needs to be, and correspondingly, the greater the inclination angle of the discharge end of the coal trough needs to be; similarly, the smaller the particle size of the material, the smaller the height between the free end of the first coal dam and the bottom of the recessed area of the coal washing trough 2 needs to be, and correspondingly, the inclination angle of the discharge end of the coal trough also needs to be smaller.
[0036] Similarly, in the above embodiment, the pressure at the outlet of the spray assembly 1 is negatively correlated with the particle size of the material. In other words, the smaller the particle size of the material, the greater the pressure at the outlet, thereby ensuring the cleaning effect.
[0037] According to an embodiment of the utility model, the water outlet pipe 13 of the coal washing device 7 is arranged below the coal washing trough 2 and is connected to the water inlet of the spray assembly 1 through a flexible hose; preferably, the flexible hose can be a flexible stainless steel hose. The design of this embodiment can effectively protect the flexible hose and avoid damage caused by long-term impact of materials.
[0038] According to an embodiment of the present invention, in order to further improve the separation effect between the material and the medium attached to the surface thereof, as Figure 3 As shown, a flushing pipe 12 is arranged above the second screening device 8, and a plurality of water outlets are opened on the side of the flushing pipe 12 facing the second screening device 8, so as to perform secondary cleaning on the material flowing onto the second screen surface, thereby achieving better solid-liquid separation between the material and the medium.
[0039] According to an embodiment of the utility model, the feeding end of the first screening device 6 is further provided with a distribution chute 11, and at least one coal retaining dam 3 is provided in the distribution chute 11; preferably, as Figure 3 As shown, the coal retaining dam 3 is provided with two or three layers, so that after the material enters the distribution chute 11, it slowly fills up multiple coal retaining dams 3, falls and mixes at multiple layers, and evenly enters the first screening device 6.
[0040] During operation, the material flows from the workshop pipeline into the distribution chute 11. After entering the distribution chute 11, the material slowly fills over the coal retaining dam 3, and after multi-layer falling and mixing, it evenly enters the first screening device 6 for primary screening. In the first screening device 6, the shearing movement formed under the action of vibration shears off the part of the material larger than the diameter of the screen hole, thereby completing most of the de-mediation operation. After that, the material remaining on the first screen surface continues to flow into the first buffer screen surface under the action of vibration, and the impact force of the arc screen surface is buffered in the first buffer screen surface, and the material flowing out through the first screen surface can also be evenly distributed, until as much material as possible is left on the side of the first coal retaining dam away from the coal washing tank 2, so that the material is fully de-mediated after passing through the arc screen surface and the buffer screen surface in turn, completing the de-mediation work of the combined media section.
[0041] When there is a lot of residual material, the material will jump from the free end of the first coal dam to the coal washing trough 2. During the movement, when the material passes through the water outlet of the spray component 1, the liquid sprayed by the spray component 1 will flush the material, especially the surface of the material. At this time, under the action of the flushing force, the material will be separated from the medium attached to its surface. Finally, under the action of gravity, the separated material will fall into the recessed area of the coal washing trough 2. Then, under the impact and vibration of the water flow, the material will be repeatedly flushed, so as to further separate the material from the medium attached to its surface. After that, the separated material will move slowly in the smooth transition area near the discharge end of the coal washing trough 2 until it flows into the second buffer screen surface 10 through the discharge end for separation again, until as much material as possible is left on the side of the second coal dam close to the coal washing trough 2, so that the material flowing out of the coal washing trough 2 can be fully de-mediumed for a second time.
[0042] Similarly, when there is a lot of residual material, the material will jump from the free end of the second coal dam to the second screening device 8, and the material will be de-mediumed three times under the combined action of vibration shear force and flushing pressure. In summary, the design of the present application can greatly improve the separation effect of the material and the medium attached to its surface through three de-medium operations, effectively improve the medium recovery rate, thereby reducing medium consumption, while reducing the equipment size and reducing the footprint.
[0043] And because the arc screen surface and the rare-medium straight screen surface in the present application are integrated together, connected by the buffer screen surface and the coal washing trough 2 in the middle, the transition is more compact and the strength is higher. A unified excitation source 5 is used, the cost is lower, and at the same time, installation space is saved, the equipment size is reduced, and the floor space occupied is reduced.
[0044] Each embodiment in this specification is described in a progressive manner, and some embodiments focus on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other.
[0045] It should be noted that, in the specification and claims of the present application and the above-mentioned drawings, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or specific order or precedence between these entities or operations. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.
[0046] Moreover, the terms "comprises," "comprising," and "having," and any variations thereof or any other variants thereof, are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus. For example, a process, method, system, product, or apparatus comprising a series of steps or units need not be limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such process, method, product, or apparatus. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.
[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0048] The above is only a specific implementation method of the present application, so that those skilled in the art can understand or implement the present application. It will be obvious to those skilled in the art that various modifications and changes to these embodiments, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application. Therefore, the present application will not be limited to the embodiments shown in this article, but will comply with the widest range consistent with the principles and novel features applied for herein.
Claims
1. A coal washing device, characterized in that: include: A spray assembly (1) and a coal washing trough (2) are matched, wherein the spray assembly (1) is arranged above a recessed area of the coal washing trough (2), and both sides of the recessed area are arranged as smooth transition areas. Under the action of the spray assembly (1), the material is separated from the medium attached to its surface and then flows out through the discharge end.
2. The coal washing device according to claim 1, characterized in that: The height of the inlet end of the coal washing trough (2) is greater than the height of the outlet end.
3. The coal washing device according to claim 2, characterized in that: The spray assembly (1) is arranged obliquely in a smooth transition zone close to the feeding end.
4. The coal washing device according to claim 3, characterized in that: The pressure at the outlet of the spray assembly (1) is negatively correlated with the particle size of the material.
5. The coal washing device according to claim 4, characterized in that: The inclination angle of the discharge end of the coal washing trough (2) is positively correlated with the particle size of the material.
6. The coal washing device according to claim 5, characterized in that: The height between the feeding end of the coal washing trough (2) and the plane where the coal retaining dam (3) is located is positively correlated with the particle size of the material.
7. The coal washing device according to claim 3, characterized in that: At least the inlet end of the coal washing trough (2) is provided with a coal retaining dam (3), and the fixed end of the coal retaining dam (3) is in a straight line with the plane where the inlet end is located.
8. The coal washing device according to claim 7, characterized in that: The wall surface of the free end of the coal retaining dam (3) which is away from the material movement direction is inclined.
9. The coal washing device according to claim 1, characterized in that: The water outlet pipe (13) of the coal washing device (7) is arranged below the coal washing tank (2) and is connected to the water inlet of the spray assembly (1) through a flexible hose.
10. A de-mediating screen, characterized in that: include: A first screening device (6), a coal washing device (7) as claimed in any one of claims 1 to 9, and a second screening device (8) are arranged in sequence along the direction of material movement, wherein the first screening device (6), the coal washing device (7) and the second screening device (8) are all connected to the excitation source (5) through a support frame (4).