A device for improving the moisture content of coal

Abstract

This utility model discloses a device for upgrading and reducing the moisture content of coal, including a filter press. The filter press has multiple filter plates, and a backflush pipe is installed at the feed end. An air compressor is located below the feed end. Multiple inclined pipes are located on the side of the backflush pipe, and multiple connecting pipes are located at the air outlet. The ends of the connecting pipes not connected to the air compressor are connected to the inclined pipes. The gas discharged from the air compressor enters the backflush pipe through the inclined pipes and flows in the opposite direction to the feed direction. This utility model features an air compressor below the feed end of the filter press, and a backflush pipe at the feed end with inclined pipes. This, in conjunction with the air compressor, allows airflow to blow in the opposite direction to the feed direction, facilitating the removal of coal powder squeezed from the inner wall of the feed pipe, ensuring unobstructed flow at the feed inlet, and allowing the material to smoothly fill the filter chamber. The filter plates are made of high-strength, corrosion-resistant material to ensure efficient filter cake formation and moisture filtration.

Description

Technical Field

[0001] This utility model relates to the technical field of coal washing and processing equipment, specifically a device for reducing the moisture content of upgraded coal. Background Technology

[0002] In the coal washing and processing process, the moisture content of clean coal is a key indicator affecting its quality and subsequent utilization. Controlling the moisture content of clean coal depends on the filtration effect of the filter press; therefore, some new types of clean coal filter presses have emerged on the market.

[0003] For example, utility model patent CN212700706U discloses a fine coal filter press, which includes a machine body with multiple filter plates inside. Baffles are fixedly connected to the side walls of the filter plates. A pushing device is provided at one end of the machine body to squeeze the multiple filter plates along the length of the machine body. A plate pulling assembly is provided along the length of the machine body to separate the filter plates. A vibration assembly is fixedly connected to the side wall of the plate pulling carriage away from the machine body. The vibration assembly includes a fixed plate, a hydraulic cylinder, and a top plate. The fixed plate is fixedly connected to the side wall of the plate pulling carriage, the hydraulic cylinder is fixedly connected to the upper surface of the fixed plate, and the top plate is fixedly connected to the piston rod of the hydraulic cylinder. When the piston rod of the hydraulic cylinder is not extended, the upper surface of the top plate is not higher than the lower surface of the baffle. This solution has the effect of reducing the workload of workers and improving the production efficiency of enterprises.

[0004] The coal filter press provided by the aforementioned patent is a device that can reduce the moisture content of coal. However, the feed inlet of the existing coal filter press does not have a backflushing function, which cannot blow away the coal powder accumulated on the inner wall of the feed pipe. In severe cases, this may cause the feed pipe to supply material poorly. Utility Model Content

[0005] The purpose of this utility model is to provide a device for reducing the moisture content of upgraded coal, which aims to improve the problem that the feed inlet of the existing clean coal filter press does not have a backflushing function and cannot blow away the coal powder accumulated on the inner wall of the feed pipe, which may cause the feed pipe to be unsmooth in severe cases.

[0006] This utility model is implemented as follows:

[0007] A device for improving the moisture content of coal includes a filter press with multiple filter plates. A backflush pipe is installed at the feed end of the filter press. An air compressor is located below the feed end of the filter press. Multiple inclined pipes are provided on the side of the backflush pipe. Multiple connecting pipes are provided at the air outlet end of the air compressor. The end of each connecting pipe that is not connected to the air compressor is connected to one of the inclined pipes. The gas discharged from the air compressor enters the backflush pipe through the inclined pipes and flows in the opposite direction to the feed direction.

[0008] Preferably, the filter press has a feed pipe at the feed end and a support at the other end. A hydraulic pump is mounted on the support, and a hydraulic cylinder is connected to the hydraulic pump. The hydraulic cylinder is used to apply pressure to the filter plates in conjunction with the components of the filter press.

[0009] Preferably, the filter press is provided with a support leg at the bottom corner, the support leg is provided with a fixing plate at the bottom end, the fixing plate is provided with a fixing hole at the corner, and the filter press is provided with a bottom plate along the bottom of the feed end.

[0010] Preferably, the filter plate has a material hole in the middle and a filter cloth on the filter plate. Limiting rods are symmetrically provided on both sides of the filter plate for mounting the filter plate on the filter press. A bend is provided at the bottom of the side of the filter plate, and a flexible tube is provided at the bottom end of the bend.

[0011] Preferably, the filter plate is made of a high-strength corrosion-resistant material, which is a stainless steel alloy or engineering ceramic, and the filter cloth is a composite woven filter cloth with a pore size of 5-15μm.

[0012] Preferably, the air compressor has an air outlet pipe at both ends, a control box on the side of the air compressor, mounting feet at both the front and rear ends of the bottom of the air compressor, mounting feet with mounting holes, and the air compressor is fixed to the base plate by bolts passing through the mounting holes.

[0013] Preferably, both ends of the backflush pipe are provided with flanges, the flange edges are provided with multiple flange holes, and the ends of the inclined pipe are provided with adapter caps.

[0014] Preferably, the connecting pipe has an adapter at the top end, a hexagon at the end of the adapter, a valve on the connecting pipe, and an installation connector at the bottom end of the connecting pipe, which is connected to the air outlet pipe.

[0015] Preferably, the filter press also includes a flow guide box. The filter press has support clips at both ends of the side with the hose along the filter plate. Multiple support brackets are provided between the two support clips. The two ends of the flow guide box are inserted into the inside of the support clips, and the support brackets abut against the bottom surface of the flow guide box.

[0016] Preferably, the inner side of the flow guide box is provided with a flow guide groove, and the bottom of the flow guide box is provided with a flow guide pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model has an air compressor installed below the feed end of the filter press, and a back-blowing pipe is installed at the feed end of the filter press. The back-blowing pipe has an inclined pipe, which, together with the air compressor, allows the airflow to blow in the opposite direction of the feed direction, which facilitates the removal of coal powder squeezed from the inner wall of the feed pipe, ensuring unobstructed flow at the feed inlet, so that the material can be smoothly filled into the filter chamber; the filter plate is made of high-strength corrosion-resistant material, and the filter cloth is a composite woven filter cloth, ensuring filter cake formation and water filtration efficiency.

[0019] 2. This utility model has a flow guide box on one side of the filter press. The flow guide box can be used to smoothly guide the water flowing out of the filter plate, which facilitates the centralized treatment of the water produced by the filter press. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the filter plate of this utility model;

[0022] Figure 3 This is a structural schematic diagram of the air compressor of this utility model;

[0023] Figure 4 This is a schematic diagram of the backflush pipe of this utility model;

[0024] Figure 5 This is a schematic diagram of the connecting pipe of this utility model;

[0025] Figure 6 This is a schematic diagram of the flow guide box of this utility model.

[0026] In the diagram: 1. Filter press; 10. Feed pipe; 11. Support platform; 12. Hydraulic pump; 13. Hydraulic cylinder; 14. Support clamp; 15. Support leg; 16. Fixing plate; 17. Fixing hole; 18. Support frame; 19. Base plate; 2. Filter plate; 21. Material hole; 22. Filter cloth; 23. Limiting rod; 24. Bend; 25. Hose; 3. Air compressor; 31. Air outlet pipe; 32. Control box; 33. Mounting foot; 34. Mounting hole; 4. Backflush pipe; 41. Inclined pipe; 42. Adapter cap; 43. Flange; 44. Flange hole; 5. Connecting pipe; 51. Adapter; 52. Hexagon; 53. Valve; 54. Mounting joint; 6. Flow guide box; 61. Flow guide groove; 62. Flow guide pipe. Detailed Implementation

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1

[0029] like Figure 1 As shown, a coal dewatering device includes a filter press 1 with multiple filter plates 2. The filter press 1 works in conjunction with the filter plates 2 to dewater the clean coal. A backflush pipe 4 is installed at the feed end of the filter press 1, and an air compressor 3 is located below the feed end. Multiple inclined pipes 41 are located on the side of the backflush pipe 4, and multiple connecting pipes 5 are located at the air outlet of the air compressor 3. The ends of the connecting pipes 5 not connected to the air compressor 3 are connected to the inclined pipes 41. The gas discharged from the air compressor 3 enters the backflush pipe 4 through the inclined pipes 41 and flows in the opposite direction to the feed. This structure facilitates the removal of accumulated materials in the feed pipes by using the reverse airflow before the filter press 1 starts operating, effectively ensuring unobstructed flow of material before entering the filter chamber, ensuring the continuity and stability of the filtration process, reducing unexpected interruptions in production, and avoiding potential clogging problems. Furthermore, a detailed analysis of the material's concentration and particle size is conducted before filtration to ensure the scientific validity and effectiveness of the implementation plan. Furthermore, based on the temperature and viscosity characteristics of the material, a suitable filter cloth 22 material and pore size are selected to improve filtration efficiency and extend the service life of the filter cloth 22. Before operation, the operating pressure, time, and other parameters of the filter press 1 need to be adjusted to find the optimal filtration conditions. This will help further reduce moisture content and improve the quality of the filter cake. The hydraulic system of the filter press 1 can precisely control pressure and flow, ensuring the uniformity and continuity of the filtration process while reducing energy consumption. In addition, the hydraulic system is well-sealed and easy to maintain, facilitating subsequent maintenance and upkeep. In actual operation, various sensors can be installed on the filter press 1. Through these sensors, real-time monitoring and automatic adjustment of the filtration process can be achieved, reducing manual intervention and improving production efficiency. Simultaneously, the system should have a user-friendly interface for easy parameter setting and fault diagnosis by operators.

[0030] like Figure 1As shown, the filter press 1 has a feed pipe 10 at its feed end, which facilitates feeding material into the filter press 1. At the other end of the filter press 1 is a support platform 11, on which a hydraulic pump 12 is mounted. The hydraulic pump 12 is connected to a hydraulic cylinder 13, which works in conjunction with the components of the filter press 1 to apply pressure to the filter plates 2. The hydraulic pump 12 is mounted on the edge of the support platform 11 to ensure stable operation and facilitate its driving of the hydraulic cylinder 13. Support legs 15 are located at the bottom corners of the filter press 1, with a fixing plate 16 at the bottom end of each support leg 15. Fixing holes 17 are located at the corners of the fixing plate 16. The support legs 15, in conjunction with the fixing plate 16, facilitate the installation and fixation of the entire filter press 1, ensuring its stable operation. A base plate 19 is located along the bottom of the feed end of the filter press 1, supporting the air compressor 3 and ensuring its stable operation.

[0031] like Figure 2 As shown, the filter plate 2 has a material hole 21 in the middle, which facilitates the injection of the material to be filtered between the filter plates 2. The filter plate 2 is also equipped with a filter cloth 22, which facilitates the filtration of coal powder and allows water to flow out smoothly. Limiting rods 23 are symmetrically arranged on both sides of the filter plate 2 for mounting the filter plate 2 on the filter press 1. A bent pipe 24 is located at the bottom of the side of the filter plate 2, and a flexible hose 25 is attached to the bottom end of the bent pipe 24. The bent pipe 24 and the flexible hose 25 facilitate the discharge of the filtered water. The filter plate 2 is made of high-strength corrosion-resistant material, such as stainless steel alloy or engineering ceramic. The filter cloth 22 is a composite woven filter cloth with a pore size of 5-15μm. The material of the filter cloth 22 is selected according to the particle size, viscosity and chemical composition of the coal to be treated. The tensile strength of the filter cloth 22 is ≥2000N / 5cm, and the air permeability is 10-30L / (m²・s). This filter cloth 22 can provide better filtration effect and longer service life, with strong air permeability and anti-clogging ability, so as to improve the uniformity and filtration accuracy of the filter cloth 22, thereby improving the overall filtration efficiency.

[0032] like Figure 3 As shown, air compressor 3 has exhaust pipes 31 at both ends for easy exhaust. A control box 32 is located on the side of air compressor 3 for easy control of its operation. Mounting feet 33 are located at both the front and rear ends of the bottom of air compressor 3, with mounting holes 34 on each foot. Air compressor 3 is fixed to the base plate 19 by bolts passing through the mounting holes 34, ensuring stable operation.

[0033] like Figure 4As shown, both ends of the backflush pipe 4 are provided with flanges 43, and the edges of the flanges 43 are provided with multiple flange holes 44. The fit between the flanges 43 and the flange holes 44 facilitates the connection between the backflush pipe 4 and the feed pipe 10 as well as the external feed pipe. The end of the inclined pipe 41 is provided with an adapter cap 42, which facilitates the fit with the connecting pipe 5, making it easy for the connecting pipe 5 to connect with the inclined pipe 41.

[0034] like Figure 5 As shown, the top of the connecting pipe 5 is equipped with an adapter 51, and the end of the adapter 51 is equipped with a hexagonal body 52. ​​The fit between the adapter 51 and the hexagonal body 52 facilitates the connection of the connecting pipe 5 to the inclined pipe 41, making it convenient for the connecting pipe 5 to be used with the inclined pipe 41. The connecting pipe 5 is equipped with a valve 53, which facilitates the control of the opening and closing of the connecting pipe 5. The bottom of the connecting pipe 5 is equipped with an installation connector 54, which is connected to the air outlet pipe 31. The installation connector 54 facilitates the smooth connection of the connecting pipe 5 to the air outlet pipe 31 of the air compressor 3. Example 2

[0035] like Figure 1 As shown, a coal dewatering device includes a filter press 1 with multiple filter plates 2. The filter press 1 works in conjunction with the filter plates 2 to dewater the clean coal. A backflush pipe 4 is installed at the feed end of the filter press 1, and an air compressor 3 is located below the feed end. Multiple inclined pipes 41 are located on the side of the backflush pipe 4, and multiple connecting pipes 5 are located at the air outlet of the air compressor 3. The ends of the connecting pipes 5 not connected to the air compressor 3 are connected to the inclined pipes 41. The gas discharged from the air compressor 3 enters the backflush pipe 4 through the inclined pipes 41 and flows in the opposite direction to the feed. This structure facilitates the removal of accumulated materials in the feed pipes by using the reverse airflow before the filter press 1 starts operating, effectively ensuring unobstructed flow of material before entering the filter chamber, ensuring the continuity and stability of the filtration process, reducing unexpected interruptions in production, and avoiding potential clogging problems. Furthermore, a detailed analysis of the material's concentration and particle size is conducted before filtration to ensure the scientific validity and effectiveness of the implementation plan. Furthermore, based on the temperature and viscosity characteristics of the material, a suitable filter cloth 22 material and pore size are selected to improve filtration efficiency and extend the service life of the filter cloth 22. Before operation, the operating pressure, time, and other parameters of the filter press 1 need to be adjusted to find the optimal filtration conditions. This will help further reduce moisture content and improve the quality of the filter cake. The hydraulic system of the filter press 1 can precisely control pressure and flow, ensuring the uniformity and continuity of the filtration process while reducing energy consumption. In addition, the hydraulic system is well-sealed and easy to maintain, facilitating subsequent maintenance and upkeep. In actual operation, various sensors can be installed on the filter press 1. Through these sensors, real-time monitoring and automatic adjustment of the filtration process can be achieved, reducing manual intervention and improving production efficiency. Simultaneously, the system should have a user-friendly interface for easy parameter setting and fault diagnosis by operators.

[0036] like Figure 1 As shown, the filter press 1 has a feed pipe 10 at its feed end, which facilitates feeding material into the filter press 1. At the other end of the filter press 1 is a support platform 11, on which a hydraulic pump 12 is mounted. The hydraulic pump 12 is connected to a hydraulic cylinder 13, which works in conjunction with the components of the filter press 1 to apply pressure to the filter plates 2. The hydraulic pump 12 is mounted on the edge of the support platform 11 to ensure stable operation and facilitate its driving of the hydraulic cylinder 13. Support legs 15 are located at the bottom corners of the filter press 1, with a fixing plate 16 at the bottom end of each support leg 15. Fixing holes 17 are located at the corners of the fixing plate 16. The support legs 15, in conjunction with the fixing plate 16, facilitate the installation and fixation of the entire filter press 1, ensuring its stable operation. A base plate 19 is located along the bottom of the feed end of the filter press 1, supporting the air compressor 3 and ensuring its stable operation.

[0037] like Figure 2 As shown, the filter plate 2 has a material hole 21 in the middle, which facilitates the injection of the material to be filtered between the filter plates 2. The filter plate 2 is also equipped with a filter cloth 22, which facilitates the filtration of coal powder and allows water to flow out smoothly. Limiting rods 23 are symmetrically arranged on both sides of the filter plate 2 for mounting the filter plate 2 on the filter press 1. A bent pipe 24 is located at the bottom of the side of the filter plate 2, and a flexible hose 25 is attached to the bottom end of the bent pipe 24. The bent pipe 24 and the flexible hose 25 facilitate the discharge of the filtered water. The filter plate 2 is made of high-strength corrosion-resistant material, such as stainless steel alloy or engineering ceramic. The filter cloth 22 is a composite woven filter cloth with a pore size of 5-15μm. The material of the filter cloth 22 is selected according to the particle size, viscosity and chemical composition of the coal to be treated. The tensile strength of the filter cloth 22 is ≥2000N / 5cm, and the air permeability is 10-30L / (m²・s). This filter cloth 22 can provide better filtration effect and longer service life, with strong air permeability and anti-clogging ability, so as to improve the uniformity and filtration accuracy of the filter cloth 22, thereby improving the overall filtration efficiency.

[0038] like Figure 3 As shown, air compressor 3 has exhaust pipes 31 at both ends for easy exhaust. A control box 32 is located on the side of air compressor 3 for easy control of its operation. Mounting feet 33 are located at both the front and rear ends of the bottom of air compressor 3, with mounting holes 34 on each foot. Air compressor 3 is fixed to the base plate 19 by bolts passing through the mounting holes 34, ensuring stable operation.

[0039] like Figure 4As shown, both ends of the backflush pipe 4 are provided with flanges 43, and the edges of the flanges 43 are provided with multiple flange holes 44. The fit between the flanges 43 and the flange holes 44 facilitates the connection between the backflush pipe 4 and the feed pipe 10 as well as the external feed pipe. The end of the inclined pipe 41 is provided with an adapter cap 42, which facilitates the fit with the connecting pipe 5, making it easy for the connecting pipe 5 to connect with the inclined pipe 41.

[0040] like Figure 5 As shown, the top of the connecting pipe 5 is equipped with an adapter 51, and the end of the adapter 51 is equipped with a hexagonal body 52. ​​The fit between the adapter 51 and the hexagonal body 52 facilitates the connection of the connecting pipe 5 to the inclined pipe 41, making it convenient for the connecting pipe 5 to be used with the inclined pipe 41. The connecting pipe 5 is equipped with a valve 53, which facilitates the control of the opening and closing of the connecting pipe 5. The bottom of the connecting pipe 5 is equipped with an installation connector 54, which is connected to the air outlet pipe 31. The installation connector 54 facilitates the smooth connection of the connecting pipe 5 to the air outlet pipe 31 of the air compressor 3.

[0041] like Figure 1 As shown, it also includes a flow guide box 6. The filter press 1 has support clips 14 at both ends on the side of the filter plate 2 where the hose 25 is provided. Multiple support brackets 18 are provided between the two support clips 14. The two ends of the flow guide box 6 are inserted into the inside of the support clips 14, and the support brackets 18 abut against the bottom surface of the flow guide box 6. The support clips 14 and the support brackets 18 are used to support the flow guide box 6 and facilitate the stable use of the flow guide box 6.

[0042] like Figure 6 As shown, the inner side of the flow guide box 6 is provided with a flow guide groove 61, which facilitates the collection of water flowing out of the filter plate 2. Furthermore, the bottom of the flow guide box 6 is provided with a flow guide pipe 62, which facilitates the outflow of the collected water.

[0043] Working Principle: Before operation, the concentration and particle size of the coal to be processed are analyzed. Based on the material's temperature and viscosity characteristics, a composite woven filter cloth 22 with a pore size of 5-15μm, tensile strength ≥2000N / 5cm, and air permeability of 10-30L / (m²・s) and a matching filter plate 2 (high-strength, corrosion-resistant material) are selected. Simultaneously, the operating pressure and time parameters of the filter press 1 are adjusted to determine the optimal filtration conditions. Then, the air compressor 3 is started, and the generated gas is transported through the outlet pipe 31 and the connecting pipe 5 with a valve 53 (connected to the outlet pipe 31 via a mounting joint 54, and the adapter 51 connected to the inclined pipe 41) to the inclined pipe 41, and then enters the backflush pipe 4. The airflow, opposite to the subsequent feed direction, clears the accumulated material in the feed pipe, ensuring a smooth material passage. Next, the coal to be filtered is passed through... The material is conveyed through the feed pipe 10 and enters the space between the filter plates 2 through the material hole 21 in the middle of the filter plate 2. At this time, the hydraulic pump 12 on the support 11 drives the hydraulic cylinder 13 to apply pressure to the filter plates 2. Under the action of pressure, the moisture in the clean coal passes through the filter cloth 22 and flows into the guide box 6 fixed by the support head 14 and the support frame 18 through the bend 24 and the hose 25 at the bottom of the side of the filter plate 2. The moisture converges in the guide groove 61 of the guide box 6 and is led out through the guide pipe 62. The clean coal remains on the filter cloth 22 to form a filter cake. During the process, the sensors on the filter press 1 monitor the filtration status in real time and realize automatic adjustment. The hydraulic system precisely controls the pressure and flow rate to ensure that the filtration process is uniform, continuous and low energy consumption. At the same time, with the help of a good user interface, the operator can easily set parameters and diagnose faults, and finally achieve the purpose of improving the quality and reducing the moisture of the clean coal.

[0044] In summary, compared with the prior art, this application provides an air compressor 3 below the feed end of the filter press 1, and the feed end of the filter press 1 is provided with four backflush pipes. The four backflush pipes are provided with inclined pipes, which, together with the air compressor 3, can make the airflow blow in the opposite direction of the feed direction, so as to facilitate the drooping of the coal powder squeezed on the inner wall of the feed pipe 10, ensuring the unobstructed flow of the feed inlet, so that the material can be smoothly filled into the filter chamber; the filter plate 2 is made of high-strength corrosion-resistant material, and the filter cloth 22 is a composite woven filter cloth 22, ensuring the filter cake forming and moisture filtration efficiency.

[0045] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A coal upgrading and water reduction device, comprising a filter press (1), a plurality of filter plates (2) are arranged on the filter press (1), characterized in that, Furthermore, the filter press (1) is equipped with a backflush pipe (4) at the feed end, and an air compressor (3) is provided below the feed end of the filter press (1). Multiple inclined pipes (41) are provided on the side of the backflush pipe (4), and multiple connecting pipes (5) are provided at the air outlet end of the air compressor (3). The end of the connecting pipe (5) that is not connected to the air compressor (3) is connected to multiple inclined pipes (41) respectively. The gas discharged from the air compressor (3) enters the backflush pipe (4) through the inclined pipes (41) and is opposite to the direction of the feed.

2. The coal upgrading device of claim 1, wherein, The filter press (1) has a feed pipe (10) at the feed end and a support (11) at the other end. A hydraulic pump (12) is provided on the support (11), and a hydraulic cylinder (13) is connected to the hydraulic pump (12). The hydraulic cylinder (13) is used to cooperate with the components of the filter press (1) to apply pressure to the filter plate (2).

3. The coal upgrading device of claim 2, wherein, The filter press (1) is provided with a support leg (15) at the bottom corner, and a fixing plate (16) is provided at the bottom end of the support leg (15). The fixing plate (16) is provided with a fixing hole (17) at the corner. The filter press (1) is provided with a bottom plate (19) at the bottom of the feed end.

4. The coal upgrading device of claim 1, wherein, The filter plate (2) has a material hole (21) in the middle and a filter cloth (22) on the filter plate (2). The filter plate (2) has symmetrical limit rods (23) on both sides for mounting the filter plate (2) on the filter press (1). The bottom side of the filter plate (2) has a bent pipe (24) and a flexible hose (25) at the bottom end of the bent pipe (24).

5. The coal upgrading device of claim 4, wherein, The filter plate (2) is made of high-strength corrosion-resistant material, which is stainless steel alloy or engineering ceramic. The filter cloth (22) is a composite woven filter cloth (22), and the pore size of the composite woven filter cloth (22) is 5-15μm.

6. The coal upgrading device of claim 3, wherein, The air compressor (3) has an air outlet pipe (31) at both ends, and a control box (32) is provided on the side of the air compressor (3). The air compressor (3) has mounting feet (33) at both ends of the bottom. The mounting feet (33) have mounting holes (34). The air compressor (3) is fixed to the base plate (19) by bolts passing through the mounting holes (34).

7. The coal upgrading device of claim 1, wherein, The backflush pipe (4) is provided with flanges (43) at both ends, and the flanges (43) have multiple flange holes (44) on their edges. The inclined pipe (41) is provided with a transition cap (42) at its end.

8. A device for reducing moisture content in upgraded coal according to claim 6, characterized in that, The top end of the connecting pipe (5) is provided with an adapter (51), the end of the adapter (51) is provided with a hexagon (52), the connecting pipe (5) is provided with a valve (53), and the bottom end of the connecting pipe (5) is provided with an installation connector (54), which is connected to the air outlet pipe (31).

9. A device for reducing moisture content in upgraded coal according to claim 4, characterized in that, It also includes a flow guide box (6). The filter press (1) has a support head (14) at both ends of the side with a hose (25) along the filter plate (2). Multiple support brackets (18) are provided between the two support heads (14). The two ends of the flow guide box (6) are inserted into the inside of the support head (14), and the support brackets (18) abut against the bottom surface of the flow guide box (6).

10. A device for reducing moisture content in upgraded coal according to claim 9, characterized in that, The inner side of the flow guide box (6) is provided with a flow guide groove (61), and the bottom of the flow guide box (6) is provided with a flow guide pipe (62).

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