A device for coal sludge sludge removal, quality improvement and ash reduction

Abstract

The present invention discloses a device for sludge sludgeification and desludge treatment to improve quality and reduce ash, which solves the problems in the prior art of sludge sludge treatment devices, such as poor sludge effect and high energy consumption, poor cleaning effect of desludge treatment devices on highly sludged coal, and inability to combine sludge treatment and desludge treatment, resulting in energy waste and complicated processes. The device of the present invention includes a coal slurry feed pipe, a coal sludge treatment cylinder, and a first partition, a second partition, and an impeller arranged in the coal sludge treatment cylinder; the first partition and the second partition divide the space in the coal sludge treatment cylinder into a buffer zone, a sludge treatment zone, and a desludge treatment zone from top to bottom; a fine-grained coal sludge discharge port and a coal slurry feed port are provided on the coal sludge treatment cylinder corresponding to the buffer zone, and the coal slurry feed pipe is connected to the coal slurry feed port; the impeller is provided in the sludge treatment zone; a coarse-grained coal discharge port and a flushing water port are provided on the coal sludge treatment cylinder corresponding to the desludge treatment zone. The present invention can be used for sludge sludgeification and desludge treatment of coal sludge.

Description

Technical Field

[0001] The invention belongs to the technical field of coal slime washing and processing, and in particular relates to a coal slime sludge removal and desliming device for improving quality and reducing ash. Background Art

[0002] Mudification is a fundamental characteristic common in fine-grained coal slimes. Clay mineral components in fine-grained coal slimes undergo mudification, forming high-ash fine mud, which seriously affects the separation efficiency of the washing process. However, due to the different characteristics of coal and gangue, there are differences in the degree of mudification between the two, which provides the possibility of achieving ash reduction in fine-grained coal slimes through mudification and desludging.

[0003] The existing mudification devices have problems such as poor mudification effect and high energy consumption; at the same time, the existing desludging devices have poor cleaning effect on highly muddy coal. Most of them adopt the method of placing the coal into a frame for washing, which is inefficient and cannot effectively clean fine-grained high-ash coal slime.

[0004] In addition, these two processes are basically separate continuous operations, and cannot achieve the combination of mudification and desludging, resulting in energy waste and complex processes. Summary of the Invention

[0005] In view of the above analysis, the present invention aims to provide a coal slime sludge and desludge quality improvement and ash reduction device, which solves at least one of the problems in the prior art that the sludge device has poor sludge effect and high energy consumption, the desludge device has poor cleaning effect on highly sludged coal, and cannot achieve the combination of sludge and desludge, resulting in energy waste and complicated process.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] The present invention provides a coal slime sliming and desliming quality improvement and ash reduction device, comprising a coal slurry feed pipe, a coal slime treatment cylinder, and a first partition, a second partition and an impeller arranged in the coal slime treatment cylinder; the first partition and the second partition divide the space in the coal slime treatment cylinder into a buffer zone, a slime formation zone and a desliming zone from top to bottom; a fine-grained coal slime discharge port and a coal slurry feed port are provided on the coal slime treatment cylinder corresponding to the buffer zone, and the coal slurry feed pipe is connected to the coal slurry feed port; the impeller is arranged in the slime formation zone; a coarse-grained coal discharge port and a flushing water port are provided on the coal slime treatment cylinder corresponding to the desliming zone.

[0008] Furthermore, the fine coal slurry discharge port is arranged at the top of the coal slurry processing cylinder, and the coal slurry feed pipe is arranged on the side wall of the coal slurry processing cylinder; the coarse coal discharge port is located at the bottom end of the coal slurry processing cylinder, and the flushing water port is arranged at the bottom surface of the coal slurry processing cylinder, and the outlet of the flushing water port is arranged upward.

[0009] Furthermore, the above-mentioned coal slime sludge removal and ash reduction device also includes a rotating motor and a transmission shaft, the impeller is sleeved on the transmission shaft, and one end of the transmission shaft is fixedly connected to the output shaft of the rotating motor.

[0010] Furthermore, the other end of the transmission shaft passes through the first partition and is rotatably connected to the second partition.

[0011] Furthermore, the impeller includes a wheel plate and a reinforcement hole opened on the wheel plate.

[0012] Furthermore, there are multiple strengthening holes.

[0013] Furthermore, a plurality of strengthening holes are arranged vertically along the wheel plate.

[0014] Furthermore, from top to bottom, the width of the wheel plate and the area of ​​the reinforcement hole gradually increase.

[0015] Furthermore, the shape of the wheel plate and the shape of the reinforcement hole are trapezoidal.

[0016] Furthermore, the coal slime processing cylinder includes a cylinder body and a chute, the bottom of the cylinder body is open, the chute is buckled at the bottom opening of the cylinder body, the flushing water outlet is arranged on the side wall of the chute, and the coarse coal discharge port is arranged at the bottom end of the chute.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] A) The coal slime sliming and desliming quality improvement and ash reduction device provided by the present invention divides the space in the coal slime treatment cylinder into a buffer zone, a slime zone and a desliming zone from top to bottom, and integrates the coal slime slime and desliming treatment in the inner cavity of the same coal slime treatment cylinder, which not only simplifies the process flow and greatly improves the production efficiency of coal slime treatment, but also effectively reduces energy consumption and reduces equipment footprint; the first baffle and the second baffle are used as flow stabilizers to control the flow velocity of the slurry, reduce the mutual influence of the buffer zone, the slime zone and the desliming zone, and realize independent and efficient operation of each zone, thereby ensuring the optimization of the separation efficiency of fine-grained coal slime and coarse-grained coal, and improving the treatment effect of the desliming process and the recovery rate of coarse-grained coal.

[0019] B) The coal slime sliming and desliming quality improvement and ash reduction device provided by the present invention fully considers the differences in the slime properties of organic components and gangue minerals in the coal slime. The coal slurry is subjected to high-shear forced slimeing through the rotation of the impeller. The slime treatment is carried out according to the characteristics of different coal samples to slime the gangue minerals. The effective separation of the organic components of the coal slime and the gangue minerals is achieved through efficient desliming, further improving the quality improvement and ash reduction effect of fine-grained coal slime and the quality of the final coarse-grained coal, and significantly reducing the pollution of the coal slime to the environment.

[0020] C) The coal slime sludge and desliming quality improvement and ash reduction device provided by the present invention has a flow direction of the coal slurry opposite to the flow direction of the flushing water. The upward-flowing flushing water can flush the gaps between the first and second partitions and the residue in the coal slime treatment cylinder, thereby preventing fine-grained coal slime from clogging the gaps between the first and second partitions and the coal slime treatment cylinder, thereby achieving self-cleaning of the coal slime sludge and desliming quality improvement and ash reduction device, and ensuring the cleaning efficiency and long-term stable operation of the coal slime sludge and desliming quality improvement and ash reduction device.

[0021] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0023] Figure 1 This is a schematic structural diagram of the coal sludge sludge removal and desliming device provided by the present invention;

[0024] Figure 2 An axial cross-sectional view of the coal sludge sludge removal and desliming device provided by the present invention;

[0025] Figure 3 A top view of the first partition in the coal sludge sludge removal and desliming device for improving quality and reducing ash provided by the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the impeller in the coal sludge sludge removal and desliming device for improving quality and reducing ash provided by the present invention;

[0027] Figure 5 This is a structural schematic diagram of the coal slurry feed pipe in the coal slurry sludge and desliming quality improvement and ash reduction device provided by the present invention.

[0028] Reference numerals:

[0029] 1-cylinder; 2-chute; 3-first baffle; 31-flow stabilizing net; 32-through hole; 33-slow flow plate; 4-second baffle; 5-impeller; 51-wheel plate; 52-reinforcement hole; 6-buffer zone; 7-mudification zone; 8-demudification zone; 9-coarse coal discharge port; 10-flushing water outlet; 11-rotating motor; 12-drive shaft; 13-coal slurry feed pipe; 131-first feed pipe; 132-second feed pipe; 133-convex ring; 14-coal slurry feed port; 15-inner brush; 16-outer brush; 17-drive rack; 18-drive gear; 19-L-shaped mounting rod; 20-fine coal slurry discharge port. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used to explain the principles of the present invention together with the embodiments of the present invention.

[0031] The present invention provides a device for coal sludge sludge removal, quality improvement and ash reduction, see Figures 1 to 2 , including a coal slurry feed pipe 13, a coal slime treatment cylinder, and a first partition 3, a second partition 4 and an impeller 5 arranged in the coal slime treatment cylinder. The first partition 3 and the second partition 4 divide the space in the coal slime treatment cylinder into a buffer zone 6, a mudification zone 7 and a desliming zone 8 from top to bottom. A fine-grained coal slime discharge port 20 and a coal slurry feed port 14 are provided on the coal slime treatment cylinder corresponding to the buffer zone 6. The coal slurry feed pipe 13 is connected to the coal slurry feed port 14. The impeller 5 is arranged in the mudification zone 7. A coarse-grained coal discharge port 9 and a flushing water port 10 are provided on the coal slime treatment cylinder corresponding to the desliming zone 8.

[0032] Specifically, from top to bottom, the fine-grained coal slime discharge port 20, the coal slurry feed port 14, the first baffle 3, the impeller 5, the second baffle 4, the flushing water port 10 and the coarse-grained coal discharge port 9 are arranged in sequence. The first baffle 3 and the second baffle 4 are both circular in shape, and the edges are fixedly connected to the inner wall of the coal slime treatment barrel (for example, welded), so as to avoid loosening caused by high shear forced mudification; the fine-grained coal slime discharge port 20 is arranged at the top of the coal slime treatment barrel, and the coal slurry feed pipe 13 is arranged on the side wall of the coal slime treatment barrel; the coarse-grained coal discharge port 9 is located at the bottom end of the coal slime treatment barrel, and the flushing water port 10 is arranged on the bottom surface of the coal slime treatment barrel, and the outlet of the flushing water port 10 is set upward, so as to form an upward water flow.

[0033] During implementation, the method for sludge and desludge treatment of coal slime using the coal slime sludge and desludge quality improvement and ash reduction device specifically includes the following steps:

[0034] Step 1: The coal slurry is slowly fed into the buffer zone 6 from the coal slurry feed port 14 through the coal slurry feed pipe 13 at a feed rate of 0.01 to 0.05 m / s. In the buffer zone 6, the flow rate of the coal slurry is further reduced under the action of the first baffle 3, thereby reducing the impact of the coal slurry on the subsequent mudification zone 7 and desludging zone 8;

[0035] Step 2: The coal slurry in the buffer zone 6 is slowly fed into the mudification zone 7 through the gaps in the first partition plate 3 at a speed of 0.02 to 0.10 m / s. In the mudification zone 7, the impeller 5 rotates to stir the coal slurry, achieving full mudification of the slurry through mechanical shear force, thereby improving the mudification treatment effect.

[0036] Step 3: The muddied coal slurry is slowly fed into the desludging zone 8 through the gaps in the second partition 4 at a speed of 0.02 to 0.10 m / s. Flushing water is fed into the muddiing zone 7 through the flushing water port 10 to flush the muddied coal slurry and separate the fine coal slime from the coarse coal. Driven by the flushing water (with an ascending speed of 0.2 to 0.5 m / s), the fine coal slime with smaller mass is brought to the fine coal slime discharge port 20 at the top of the coal slime processing barrel and discharged from the fine coal slime discharge port 20, and the coarse coal with larger mass is discharged from the coarse coal discharge port 9 at the bottom of the coal slime processing barrel, thereby completing the coal slime sorting.

[0037] It should be noted that the coal slurry sludge and desliming quality improvement and ash reduction device of this embodiment is particularly suitable for coal slurry with the following particle size distribution: the particle size of the coal slurry is ≤0.5mm, among which the particle size of fine coal slurry is <0.045mm, and the particle size of coarse coal is ≥0.045.

[0038] Compared with the prior art, the device for slime sludgeification and desliming for improving quality and reducing ash provided by the present invention, on the one hand, divides the space in the slime treatment cylinder into a buffer zone 6, a slimeification zone 7 and a desliming zone 8 from top to bottom, and integrates the slime sludge and desliming treatment in the inner cavity of the same slime treatment cylinder, which not only simplifies the process flow and greatly improves the production efficiency of the slime treatment, but also effectively reduces energy consumption and reduces the equipment footprint; the first baffle 3 and the second baffle 4 are used as flow stabilizers to control the flow velocity of the slurry, reduce the mutual influence of the buffer zone 6, the slimeification zone 7 and the desliming zone 8, and realize the independent and efficient operation of each area, thereby ensuring the optimization of the separation efficiency of fine-grained coal slime and coarse-grained coal, and improving the treatment effect of the desliming process and the recovery rate of the coarse-grained coal.

[0039] On the other hand, taking full account of the differences in the mud properties of organic components and gangue minerals in the coal slime, the coal slurry is subjected to high-shear forced mudification through the rotation of the impeller 5, and mudification treatment is carried out according to the characteristics of different coal samples to muddy the gangue minerals. The effective separation of the organic components of the coal slime and the gangue minerals is achieved through efficient desludging, further improving the quality and ash reduction effect of fine-grained coal slime and the quality of the final coarse-grained coal, and significantly reducing the pollution of the coal slime to the environment.

[0040] On the other hand, since the flow direction of the coal slurry is opposite to the flow direction of the flushing water, the upward-flowing flushing water can flush the gaps between the first partition plate 3 and the second partition plate 4 and the residues in the coal slime treatment cylinder, thereby preventing fine-grained coal slime from clogging the gaps between the first partition plate 3 and the second partition plate 4 and the coal slime treatment cylinder, thereby realizing the self-cleaning of the coal slime sludge and desliming quality improvement and ash reduction device, and ensuring the cleaning efficiency and the long-term stable operation of the coal slime sludge and desliming quality improvement and ash reduction device.

[0041] For the structures of the first baffle 3 and the second baffle 4, see Figure 3It includes a mounting ring and a flow stabilizing sheet arranged in the inner area of ​​the mounting ring. The flow stabilizing sheet is in the shape of a grid. A flow stabilizing net 31 is set in some grids, and the remaining grids are through holes 32. Among them, the through holes 32 can ensure that the flushing water passes smoothly and flows upward quickly to flush the coal slurry in the demuding area 8, the mudification area 7 and the buffer zone 6, thereby ensuring the demuding efficiency and effect. The flow stabilizing net 31 can properly isolate the demuding area 8, the mudification area 7 and the buffer zone 6, reduce the liquid level fluctuations in the buffer zone 6 and the demuding area 8, thereby reducing the impact of the disturbance generated by the rotation of the impeller 5 in the mudification area 7 on the buffer zone 6 and the demuding area 8.

[0042] For example, see Figure 3 The through holes 32 and the flow-stabilizing net 31 are both rectangular in shape, and a plurality of through holes 32 and a plurality of flow-stabilizing nets 31 are alternately arranged, that is, a flow-stabilizing net 31 is present in every other mesh.

[0043] From the dual perspectives of flow stabilization and smooth flushing water flow, in the flow stabilizing sheet, the ratio of the total area of ​​multiple flow stabilizing nets 31 to the total area of ​​multiple through holes 32 is 1 to 1.5:1, and in each flow stabilizing net 31, the ratio of the total area of ​​multiple mesh holes to the area of ​​the flow stabilizing net 31 is 0.8 to 1:2.

[0044] In order to further reduce the impact of the rotation of the impeller 5 on the buffer zone 6 and the desludging zone 8, the above-mentioned first baffle 3 and second baffle 4 also include a slow flow plate 33. The slow flow plate 33 is arranged on the side of the flow stabilizing plate facing the mud zone 7. From the dual perspectives of stabilizing flow and smooth flushing water, the slow flow plate 33 is fixedly connected to the side of the flow stabilizing net 31. This is because the fluctuations generated by the rotation of the impeller 5 are mainly along the radial direction of the coal slime treatment cylinder. Through the setting of the slow flow plate 33, the fluctuations in the mud zone 7 can be pre-stabilized, further reducing the impact of the rotation of the impeller 5 on the buffer zone 6 and the desludging zone 8, ensuring the uniform distribution of the coal slurry during the flow process, and avoiding excessively fast or uneven flow rates that lead to reduced treatment efficiency and poor results.

[0045] It can be understood that in order to realize the installation and rotation of the impeller 5, the above-mentioned coal sludge sludge removal and quality improvement and ash reduction device also includes a rotating motor 11 and a transmission shaft 12. The impeller 5 is sleeved on the transmission shaft 12, and one end of the transmission shaft 12 is fixedly connected to the output shaft of the rotating motor 11. The transmission shaft 12 and the impeller 5 are driven by the rotating motor 11 to rotate synchronously, so as to stir and sludge the coal slurry in the sludge zone 7.

[0046] In order to reduce the shaking of the transmission shaft 12 , the other end of the transmission shaft 12 passes through the first partition plate 3 and is rotatably connected to the second partition plate 4 , so that the radial shaking of the transmission shaft 12 is limited by the first partition plate 3 and the second partition plate 4 .

[0047] In order to improve the high shear forced mudding effect, the structure of the impeller 5 is specifically described in detail. Figure 4It includes a wheel plate 51 and a strengthening hole 52 opened on the wheel plate 51. Through the setting of the strengthening hole 52, bubbles can be generated during the stirring process of the coal slurry, thereby improving the high shear forced mudification effect.

[0048] To further enhance the high-shear forced mudification effect, multiple strengthening holes 52 are arranged vertically along the wheel plate 51. From top to bottom, the width of the wheel plate 51 and the area of ​​the strengthening holes 52 gradually increase. Thus, as the drive shaft 12 rotates, the gradually increasing wheel plate 51 gradually increases the shear force on the coal slurry, improving the mixing and homogenization of the coal slurry and ensuring that the coal slurry receives sufficient strong shear mudification during the treatment process, thereby achieving a more efficient mudification effect.

[0049] Exemplarily, the shape of the wheel plate 51 and the shape of the strengthening hole 52 are trapezoidal. Thus, through the wheel plate 51 and the strengthening hole 52 of specific shapes, the coal slurry is subjected to a stronger shear force when flowing between the impellers 5, thereby effectively enhancing the mudification effect.

[0050] It can be understood that in order to facilitate the desludging and discharge of coarse-grained coal, the above-mentioned coal slime processing cylinder includes a cylinder 1 and a chute 2, the bottom of the cylinder 1 is open, the chute 2 is buckled at the bottom opening of the cylinder 1, the flushing water outlet 10 is arranged on the side wall of the chute 2, and the coarse-grained coal discharge port 9 is arranged at the bottom end of the chute 2.

[0051] Considering that the coal slurry feed port will inevitably deposit too much coal slime after long-term feeding, resulting in blockage, in the prior art, for the blockage of the pipeline, it is usually necessary to remove the pipeline. However, this method requires suspending the slurry slurry and desludging process, which is complicated. In this embodiment, the coal slurry feed pipe 13 is a telescopic branch, see Figure 5 , that is, it includes a first feed pipe 131 and a second feed pipe 132 connected in sequence, the first feed pipe is located outside the coal slime treatment barrel, the second feed pipe 132 is located inside the coal slime treatment barrel, the second feed pipe 132 is sleeved on the outer wall of the first feed pipe 131 and is slidably sealed with the first feed pipe 131, the first feed pipe 131 is located outside the coal slime treatment barrel, and the second feed pipe 132 is provided with a convex ring 133 at one end close to the first feed pipe 131, the second feed pipe 132 is located inside the coal slime treatment barrel, and the convex ring 133 is located outside the coal slime treatment barrel.

[0052] The above-mentioned coal sludge slurrying and desliming device also includes a feed pipe cleaning member, which includes an inner brush 15. The brush rod end of the inner brush 15 is fixedly connected to the first feed pipe 131, and the bristle end of the inner brush 15 protrudes into the second feed pipe 132. The bristles of the inner brush 15 are in contact with the inner wall of the second feed pipe 132. Figure 5In this way, the operator pulls the convex ring 133 back and forth to make the second feed pipe 132 move relative to the first feed pipe 131 , and the inner brush 15 can brush the inner wall of the second feed pipe 132 .

[0053] In order to be able to brush the discharge end of the second feed pipe 132, the above-mentioned feed pipe cleaning part also includes an outer brush 16, a drive rack 17, a drive gear 18 and an L-shaped mounting rod 19. One end of the drive rack 17 is fixedly connected to the inner wall of the coal slime treatment cylinder, and the other end is suspended. The drive gear 18 is rotatably connected to the outer wall of the second feed pipe 132 through a gear shaft. The drive gear 18 is vertically meshed with the drive rack 17. One end of the L-shaped mounting rod 19 is fixedly connected to the drive gear 18, and the other end of the L-shaped mounting rod 19 is fixedly connected to the brush rod end of the outer brush 16. The bristles of the outer brush 16 are in contact with the discharge end of the second feed pipe 132. In this way, when the second feed tube 132 reciprocates up and down, it will drive the drive gear 18 to reciprocate on the drive rack 17, thereby driving the drive gear 18 to rotate and the L-shaped mounting rod 19 to swing, so that the bristles swing back and forth relative to the discharge end of the second feed tube 132, brushing the discharge end of the second feed tube 132.

[0054] Example 1

[0055] This example used a sludge-desludge treatment on lignite samples from Inner Mongolia, with a treatment time of 5 minutes. The corresponding products were screened for particle size analysis. Before sludge desludge, the proportion of -0.045mm was 28.51%, and the ash content was 49.00%. After sludge desludge, the proportion of -0.045mm was 32.59%, and the ash content was 49.82%. At the same time, after removing the fine mud through desludge removal, the ash content of the entire feed was reduced from 32.21% to 22.70%. At the same time, the ash content of the 0.5-0.25mm particle size was 22.03%, achieving efficient removal of fine mud from fine-grained coal mud.

[0056] The specific particle size distribution table after treatment by the coal slime sludge and desliming quality improvement and ash reduction device is shown in Table 1.

[0057] Table 1 Particle size distribution of Example 1

[0058]

[0059] As can be seen from Table 1, the mudification and desliming process significantly reduced the ash content of the coal slime, especially the ash content of the coarser-grained coal slime, indicating its effectiveness in improving coal quality and reducing ash content. In addition, the proportion of fine-grained coal slime increased after mudification, which enhanced the effectiveness of the subsequent desliming treatment.

[0060] Example 2

[0061] This example used a lignite sample from Inner Mongolia to undergo mudification and desludging, with a treatment time of 10 minutes. The corresponding product was subjected to sieve particle size analysis. Before mudification, the proportion of -0.045mm particles was 28.51%, and the ash content was 49.00%. After mudification, the proportion of -0.045mm particles was 39.43%, and the ash content was 49.82%. At the same time, after removing the fine mud through desludging, the ash content of the entire feed was reduced from 32.21% to 21.02%. Meanwhile, the ash content of the 0.5-0.25mm particle size was 20.04%, achieving efficient pre-ash reduction of fine coal slime.

[0062] The specific particle size distribution table after treatment by the coal slime sludge and desliming quality improvement and ash reduction device is shown in Table 2.

[0063] Table 2 Particle size distribution of Example 2

[0064]

[0065] As can be seen from Table 2, the mudification and desludging process significantly reduced the ash content of the coal slime, especially the ash content of the coarser-grained coal slime, indicating its effectiveness in improving quality and reducing ash content. In addition, the proportion of fine-grained coal slime increased after mudification, which enhanced the effectiveness of the subsequent desludging treatment.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A device for sludge desliming, quality improvement and ash reduction of coal, characterized in that: It includes a coal slurry feeding pipe, a coal slurry processing cylinder, and a first partition plate, a second partition plate and an impeller arranged in the coal slurry processing cylinder; The first partition and the second partition divide the space in the coal slime treatment cylinder into a buffer zone, a slime formation zone and a desliming zone from top to bottom; A fine coal slime discharge port and a coal slurry feed port are provided on the coal slurry processing cylinder corresponding to the buffer zone, and the coal slurry feed pipe is connected to the coal slurry feed port; The impeller is arranged in the mudification zone; A coarse coal discharge port and a flushing water port are provided on the coal slime treatment cylinder corresponding to the desliming area; The fine coal slime discharge port is arranged at the top of the coal slime processing cylinder, and the coal slurry feed pipe is arranged on the side wall of the coal slime processing cylinder; the coarse coal discharge port is located at the bottom end of the coal slime processing cylinder, and the flushing water port is arranged on the bottom surface of the coal slime processing cylinder, and the water outlet of the flushing water port is arranged upward.

2. The device for coal sludge desliming, quality improvement and ash reduction according to claim 1, characterized in that: It also includes a rotating motor and a transmission shaft, the impeller is sleeved on the transmission shaft, and one end of the transmission shaft is fixedly connected to the output shaft of the rotating motor.

3. The device for coal sludge desliming, quality improvement and ash reduction according to claim 2, characterized in that: The other end of the transmission shaft passes through the first partition plate and is rotatably connected to the second partition plate.

4. The device for coal sludge sludge removal, quality improvement and ash reduction according to claim 1, characterized in that: The impeller includes a wheel plate and a reinforcement hole opened on the wheel plate.

5. The device for coal sludge desliming, quality improvement and ash reduction according to claim 4, characterized in that: There are multiple strengthening holes.

6. The device for coal sludge sludge removal, quality improvement and ash reduction according to claim 5, characterized in that: A plurality of strengthening holes are arranged vertically along the wheel plate.

7. The device for coal sludge sludge removal, quality improvement and ash reduction according to claim 6, characterized in that: From top to bottom, the width of the wheel plate and the area of ​​the reinforcement hole gradually increase.

8. The device for coal sludge desliming, quality improvement and ash reduction according to claim 7, characterized in that: The shape of the wheel plate and the shape of the reinforcement hole are trapezoidal.

9. The device for coal sludge sludge removal, quality improvement and ash reduction according to any one of claims 1 to 8, characterized in that: The coal slime processing cylinder includes a cylinder body and a chute. The bottom of the cylinder body is open. The chute is buckled at the bottom opening of the cylinder body. The flushing water port is arranged on the side wall of the chute. The coarse coal discharge port is arranged at the bottom end of the chute.

Images