Filter sieve and fluidized bed dry coal separator

Abstract

The filter sieve and fluidized bed dry coal separator comprises a base, a fluidized bed and the filter sieve, a plurality of air holes distributed at equal intervals are formed in the filter sieve, positioning plates are fixedly installed at the two ends of the filter sieve respectively, and two positioning blocks are fixedly installed on each positioning plate; the two positioning blocks are both provided with inserting grooves, the pulling plates are pulled at the same time, the pulling plates drive the connecting plates to move through the connecting rods, the connecting plates drive the inserting blocks to be away from the inserting grooves, at the moment, the two positioning plates can be moved, the positioning blocks are made to be separated from the positioning grooves, the inserting blocks are made to be separated from the inserting grooves, and the filter sieve can be rapidly disassembled and replaced; material loss and energy consumption increase caused by damage of the filter sieve are avoided, the maintenance time and cost are reduced, the operation efficiency of equipment is improved, meanwhile, the filter sieve can be conveniently replaced with the filter sieve meeting the current coal quality and process requirements, and the separation effect and the product quality of the equipment can be guaranteed.

Description

Technical Field

[0001] This application relates to the field of coal sorting technology, and in particular to a filter screen and a fluidized bed dry coal preparation machine. Background Technology

[0002] Coal is hailed as black gold and the food of industry. It has been one of the main energy sources used by mankind since the 18th century. During the coal mining process, high-quality coal, low-quality coal, and impurities such as dust are mixed together. In order to obtain high-quality coal, coal sorting is necessary. Coal sorting is mainly divided into wet coal preparation and dry coal preparation. However, wet coal preparation consumes a lot of water resources. With the continuous destruction of the water environment and the continuous reduction of water resources, wet coal preparation is becoming less and less common, while dry coal preparation is becoming more and more common. Fluidized bed dry coal preparation machine belongs to dry coal preparation.

[0003] In existing dry coal preparation machines using filter screens and fluidized beds, the filter screen and fluidized bed are an integrated structure, making it difficult to disassemble and replace the filter screen. This leads to excessive wear and tear, damaging the filter screen and reducing the equipment's operating efficiency and lifespan. Furthermore, the fixed angle of the fluidized bed makes it difficult to control the material's movement trajectory and residence time within the fluidized bed, resulting in poor separation performance and increased material loss during the separation process. Therefore, this paper proposes a dry coal preparation machine using a filter screen and fluidized bed to address these issues. Summary of the Invention

[0004] This embodiment provides a filter screen and a fluidized bed dry coal preparation machine to solve the problems in the prior art where the filter screen and fluidized bed are an integral structure, making it difficult to disassemble and replace the filter screen. The filter screen is easily damaged due to excessive wear, reducing the operating efficiency and service life of the equipment. In addition, the angle of the fluidized bed is fixed, making it difficult to control the movement trajectory and residence time of the material in the fluidized bed, resulting in poor separation effect and easy to increase the loss of material during the separation process.

[0005] According to one aspect of this application, a filter screen and a fluidized bed dry coal preparation machine are provided, including a base, a fluidized bed and a filter screen. The filter screen is provided with a plurality of equidistantly distributed air holes. Positioning plates are fixedly installed at both ends of the filter screen. Two positioning blocks are fixedly installed on each of the two positioning plates. Each of the two positioning blocks has an insertion groove. Four limiting blocks are fixedly installed inside the fluidized bed. Each of the four limiting blocks has a fixing groove and a positioning groove inside. A connecting plate is slidably connected inside each of the four fixing grooves. Insertion blocks and moving rods are fixedly installed at both ends of the connecting plate. One end of each of the two moving rods extends to the outer end of the fluidized bed and is fixedly installed with a pull plate. Each of the four positioning blocks can be inserted into the positioning groove. Each insertion block can be inserted into the insertion groove. A second spring is sleeved on the outer surface of each of the multiple moving rods. The two ends of the second spring are fixedly connected to the fixing groove and the connecting plate, respectively.

[0006] Furthermore, two side plates are fixedly installed on the base, and an installation plate is fixedly installed between the two side plates. Multiple connecting rods are slidably connected to the installation plate. Limiting plates are fixedly installed at the bottom ends of the multiple connecting rods, and the top ends of the multiple connecting rods are fixedly installed to the same movable plate. A fluidized bed is rotatably connected to the movable plate. Springs are sleeved on the connecting rods, and the two ends of the springs are fixedly connected to the limiting plate and the installation plate, respectively.

[0007] Furthermore, a vibration motor is fixedly installed on the movable plate, and a through hole is provided on the mounting plate, through which the vibration motor can pass.

[0008] Furthermore, the movable plate is provided with an adjustment assembly, which includes a lead screw, a motor, a moving block, and support rods. Two fixed plates are fixedly installed on the moving block, and the lead screw is rotatably connected between the two fixed plates via bearings. A motor is fixedly installed on one of the fixed plates, and the output shaft of the motor passes through the fixed plate and is fixedly connected to the lead screw. The moving block is threadedly connected to the lead screw, and two support rods are rotatably connected to the moving block. Both support rods are rotatably connected to the bottom end of the fluidized bed.

[0009] Furthermore, two limiting rods are fixedly installed between the two fixed plates, and the moving block is slidably connected to the two limiting rods.

[0010] Furthermore, a fixed box is fixedly installed on one side of the fluidized bed. The fixed box has a gangue discharge port and a coal discharge port. An extension plate is fixedly installed on the fixed box. A screw is internally threaded onto the extension plate. A handwheel is fixedly installed at the bottom end of the screw. A baffle plate is rotatably connected to the other end of the screw through a bearing. The baffle plate extends into the interior of the fixed box.

[0011] Furthermore, two sliding grooves are formed on the inner wall of the extension plate, and two sliders are fixedly installed on the extension plate, with the sliders slidably connected to the sliding grooves.

[0012] Furthermore, the fluidized bed has three hot air pipes and one cold air pipe connected to its sidewall. The three hot air pipes are connected to an external hot air system, and the cold air pipe is connected to an external cold air system.

[0013] Furthermore, the top of the fluidized bed is connected to three exhaust pipes, which are connected to an external gas emission system.

[0014] Furthermore, the fluidized bed is provided with a feed inlet.

[0015] In the above embodiments of this application, by simultaneously pulling the pull plate, the pull plate drives the connecting plate to move through the connecting rod. The connecting plate drives the plug blocks away from the plug slot. At this time, the two positioning plates can be moved so that the positioning blocks disengage from the positioning slots and the plug blocks disengage from the plug slots. This allows for the rapid disassembly and replacement of the filter screen, avoiding material loss and increased energy consumption due to filter screen damage, reducing maintenance time and costs, improving equipment operating efficiency, and facilitating the replacement with a filter screen suitable for the current coal quality and process requirements, which helps ensure the equipment's sorting effect and product quality.

[0016] By setting the adjustment component and starting the motor, the output shaft of the motor rotates, driving the lead screw to rotate. With the cooperation of two limit rods, the movable block moves along the surface of the lead screw. The movable block drives the fluidized bed to rotate through two support rods. The tilt angle of the fluidized bed can be adjusted, which can affect the movement trajectory and residence time of the material in the fluidized bed, thereby optimizing the sorting effect, reducing the loss of material in the sorting process, and ensuring that more useful materials are effectively recovered.

[0017] By turning the handwheel, the screw rotates and moves. With the cooperation of the chute and the slider, the baffle can move up and down, allowing the baffle to precisely control the flow direction of the material between the gangue discharge port and the coal discharge port. This ensures that the material is sorted along a predetermined path, helping to reduce material mixing and cross-contamination, improving the accuracy and efficiency of sorting. It can flexibly respond to changes in coal quality, ensuring that the equipment achieves the best sorting effect under different coal qualities. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of one embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the overall internal structure of one embodiment of this application;

[0021] Figure 3 This is a side view of a fluidized bed structure according to an embodiment of this application;

[0022] Figure 4 This is a three-dimensional structural diagram of a filter screen according to an embodiment of this application;

[0023] Figure 5 This is one embodiment of the present application. Figure 2 A magnified structural diagram at point A;

[0024] Figure 6 This is a top view of the adjustment component according to one embodiment of the present application;

[0025] Figure 7 This is a side view of the adjustment component according to one embodiment of the present application;

[0026] Figure 8 This is a partial top view of the structure of one embodiment of this application.

[0027] In the diagram: 1. Base; 2. Mounting plate; 3. Movable plate; 4. Limiting plate; 5. First spring; 6. Connecting rod; 7. Side plate; 8. Limiting block; 9. Positioning plate; 10. Fluidized bed; 11. Feed inlet; 12. Exhaust pipe; 13. Coal discharge port; 14. Baffle plate; 15. Fixed box; 16. Gangue discharge port; 17. Handwheel; 18. Motor; 19. Moving block; 20. Screw; 21. Vibrating motor; 22. Support rod; 23. Filter screen; 24. Fixed plate; 25. Screen hole; 26. Hot air pipe; 27. Cold air pipe; 28. Sliding block; 29. ​​Slide groove; 30. Screw; 31. Extension plate; 32. Pull plate; 33. Second spring; 34. Connecting plate; 35. Positioning groove; 36. Insertion block; 37. Insertion groove; 38. Positioning block; 39. Moving rod; 40. Limiting rod. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Please see Figure 1-8As shown, a filter screen and a fluidized bed dry coal preparation machine include a base 1, a fluidized bed 10, and a filter screen 23. The filter screen 23 has multiple equidistantly distributed air holes 25. Positioning plates 9 are fixedly installed at both ends of the filter screen 23. Two positioning blocks 38 are fixedly installed on each of the two positioning plates 9, and each positioning block 38 has an insertion groove 37. Four limiting blocks 8 are fixedly installed inside the fluidized bed 10. Each of the four limiting blocks 8 has a fixing groove and a positioning groove 35 inside. A connecting plate 34 is slidably connected inside each of the four fixing grooves. Two ends of the 4 are respectively fixedly installed with plug-in blocks 36 and moving rods 39. One end of each of the two moving rods 39 extends to the outer end of the fluidized bed 10 and is fixedly installed with a pull plate 32. All four positioning blocks 38 can be inserted into the positioning slots 35. All plug-in blocks 36 can be inserted into the plug-in slots 37. The outer surfaces of the multiple moving rods 39 are fitted with second springs 33. The two ends of the second springs 33 are respectively fixedly connected to the fixing slots and the connecting plate 34. The screen holes on the filter screen are used for airflow. The screen plate not only supports the coal particles, but also regulates the airflow through the air holes, affecting the stratification and separation of coal particles.

[0035] Two side plates 7 are fixedly installed on the base 1, and an installation plate 2 is fixedly installed between the two side plates 7. Multiple connecting rods 6 are slidably connected to the installation plate 2. Limiting plates 4 are fixedly installed at the bottom ends of the multiple connecting rods 6. The top ends of the multiple connecting rods 6 are fixedly installed to the same movable plate 3. A fluidized bed 10 is rotatably connected to the movable plate 3. A first spring 5 is sleeved on the connecting rod 6. The two ends of the first spring 5 are fixedly connected to the limit plate 4 and the installation plate 2, respectively.

[0036] A vibration motor 21 is fixedly installed on the movable plate 3. A through hole is provided on the mounting plate 2, through which the vibration motor 21 can pass.

[0037] An adjustment assembly is provided on the movable plate 3. The adjustment assembly includes a lead screw 20, a motor 18, a moving block 19, and support rods 22. Two fixed plates 24 are fixedly installed on the moving block 19. The lead screw 20 is rotatably connected between the two fixed plates 24 through bearings. The motor 18 is fixedly installed on one of the fixed plates 24. The output shaft of the motor 18 passes through the fixed plate 24 and is fixedly connected to the lead screw 20. The moving block 19 is threadedly connected to the lead screw 20. Two support rods 22 are rotatably connected to the moving block 19. Both support rods 22 are rotatably connected to the bottom end of the fluidized bed 10.

[0038] Two limiting rods 40 are fixedly installed between the two fixed plates 24, and the moving block 19 is slidably connected to the two limiting rods 40.

[0039] A fixed box 15 is fixedly installed on one side of the fluidized bed 10. The fixed box 15 has a gangue discharge port 16 and a coal discharge port 13. The coal discharge port 13 is responsible for discharging the sorted clean coal, while the gangue discharge port 16 discharges tailings or gangue. An extension plate 31 is fixedly installed on the fixed box 15. A screw 30 is threadedly connected to the inside of the extension plate 31. A handwheel 17 is fixedly installed at the bottom end of the screw 30. The other end of the screw 30 is rotatably connected to a baffle plate 14 through a bearing. The baffle plate 14 extends into the interior of the fixed box 15.

[0040] The inner wall of the extension plate 31 has two sliding grooves 29, and two sliders 28 are fixedly installed on the extension plate 31. The sliders 28 are slidably connected to the sliding grooves 29 to prevent the screw 30 from rotating and causing the baffle plate 14 to rotate.

[0041] The fluidized bed 10 has three hot air pipes 26 and one cold air pipe 27 connected to its side wall. The three hot air pipes 26 are connected to an external hot air system, and the cold air pipe 27 is connected to an external cold air system.

[0042] The top of the fluidized bed 10 is connected to three exhaust pipes 12, which are connected to an external gas emission system.

[0043] The fluidized bed 10 is provided with a feed inlet 11.

[0044] In use, all electrical components mentioned in this application are connected to an external power supply and control switch to activate the external hot air system and cold air system. The hot air pipe 26 can provide heated airflow, which helps fluidize and separate coal particles. Especially in low-temperature environments or when the humidity of coal particles is high, the hot air can increase the temperature inside the fluidized bed 10, promoting the drying and fluidization of coal particles. The cold air pipe 27 can provide cooling airflow to regulate the temperature inside the fluidized bed 10 and prevent overheating. At the same time, the cold air also helps to maintain stable humidity inside the fluidized bed 10 and improve separation efficiency. The hot air and cold air are evenly delivered to the bottom of the fluidized bed to form a stable airflow field. Coal particles enter the fluidized bed from the feed inlet, mix with the airflow, and achieve fluidization. In the fluidized bed 10, due to the action of the airflow, the coal particles will stratify according to density differences, with lighter products (such as clean coal) floating to the top and heavier products (such as gangue) sinking. The external gas emission system is activated, and multiple exhaust pipes 12 can discharge excess gas and dust from the fluidized bed 10, maintaining gas circulation and cleanliness within the fluidized bed 10. This helps improve sorting efficiency while reducing environmental pollution. The vibration motor 21 generates vibration, allowing the material in the fluidized bed 10 to tumble and dry fully. This tumbling motion helps the material to fully contact and mix with the hot air, improving drying efficiency.

[0045] When the motor 18 is started, the output shaft of the motor 18 rotates, which drives the lead screw 20 to rotate. With the cooperation of the two limit rods 40, the moving block 19 moves along the surface of the lead screw 20. The moving block 19 drives the fluidized bed 10 to rotate through the two support rods 22. The tilt angle of the fluidized bed 10 can be adjusted, which can affect the movement trajectory and residence time of the material in the fluidized bed 10, thereby optimizing the sorting effect, reducing the loss of material in the sorting process, and ensuring that more useful materials are effectively recovered.

[0046] Simultaneously, pulling the pull plate 32 causes the connecting plate 34 to move via the connecting rod 6. The connecting plate 34 causes the insertion blocks 36 to move away from the insertion slots 37. At this time, the two positioning plates 9 can be moved, causing the positioning blocks 38 to disengage from the positioning slots 35 and the insertion blocks 36 to disengage from the insertion slots 37. This allows for the rapid disassembly and replacement of the filter screen 23, avoiding material loss and increased energy consumption due to damage to the filter screen 23, reducing maintenance time and costs, improving equipment operating efficiency, and facilitating the replacement with a filter screen 23 suitable for the current coal quality and process requirements, which helps ensure the equipment's sorting effect and product quality.

[0047] Turning the handwheel 17 causes the screw 30 to rotate, and the screw 30 moves while rotating. With the cooperation of the chute 29 and the slider 28, the baffle plate 14 can move up and down, so that the baffle plate 14 can accurately control the flow direction of the material between the gangue discharge port 16 and the coal discharge port 13, ensuring that the material is sorted according to the predetermined path. This helps to reduce the mixing and crossing of materials, improve the accuracy and efficiency of sorting, and can flexibly respond to changes in coal quality, ensuring that the equipment can achieve the best sorting effect under different coal qualities.

[0048] The advantages of this application are:

[0049] 1. By simultaneously pulling the pull plate 32, the pull plate 32 drives the connecting plate 34 to move through the connecting rod 6. The connecting plate 34 drives the insertion blocks 36 away from the insertion slot 37. At this time, the two positioning plates 9 can be moved so that the positioning block 38 is disengaged from the positioning slot 35 and the insertion block 36 is disengaged from the insertion slot 37. This allows for the rapid disassembly and replacement of the filter screen 23, avoiding material loss and increased energy consumption due to damage to the filter screen 23, reducing maintenance time and costs, improving equipment operating efficiency, and facilitating the replacement with a filter screen 23 suitable for the current coal quality and process requirements, which helps ensure the equipment's sorting effect and product quality.

[0050] 2. By setting the adjustment component, the motor 18 is started. The output shaft of the motor 18 rotates, driving the lead screw 20 to rotate. With the cooperation of the two limit rods 40, the moving block 19 moves along the surface of the lead screw 20. The moving block 19 drives the fluidized bed 10 to rotate through the two support rods 22. The tilt angle of the fluidized bed 10 can be adjusted, which can affect the movement trajectory and residence time of the material in the fluidized bed 10, thereby optimizing the sorting effect, reducing the loss of material in the sorting process, and ensuring that more useful materials are effectively recovered.

[0051] 3. By rotating the handwheel 17, the screw 30 rotates. As the screw 30 rotates, it moves. With the cooperation of the chute 29 and the slider 28, the baffle plate 14 can move up and down. This allows the baffle plate 14 to precisely control the flow direction of the material between the gangue discharge port 16 and the coal discharge port 13, ensuring that the material is sorted according to the predetermined path. This helps to reduce the mixing and cross-contamination of materials, improve the accuracy and efficiency of sorting, and can flexibly respond to changes in coal quality, ensuring that the equipment can achieve the best sorting effect under different coal qualities.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A filter screen and a fluidized bed dry coal preparation machine, comprising a base (1), a fluidized bed (10), and a filter screen (23), characterized in that: The filter screen (23) is provided with a plurality of equally spaced air holes (25). Positioning plates (9) are fixedly installed at both ends of the filter screen (23). Two positioning blocks (38) are fixedly installed on each of the two positioning plates (9). Insertion slots (37) are opened on each of the two positioning blocks (38). Four limiting blocks (8) are fixedly installed inside the fluidized bed (10). Fixed slots and positioning slots (35) are opened inside the four limiting blocks (8). Connecting plates (34) are slidably connected inside the four fixed slots. The connecting plate (34) is fixedly installed with plug-in blocks (36) and moving rods (39) at both ends. One end of each of the two moving rods (39) extends to the outer end of the fluidized bed (10) and is fixedly installed with a pull plate (32). All four positioning blocks (38) can be inserted into the positioning slots (35). All the plug-in blocks (36) can be inserted into the plug-in slots (37). The outer surfaces of the multiple moving rods (39) are fitted with second springs (33). The two ends of the second springs (33) are fixedly connected to the fixing slots and the connecting plate (34) respectively.

2. The filter screen and fluidized bed dry coal preparation machine according to claim 1, characterized in that: Two side plates (7) are fixedly installed on the base (1), and an installation plate (2) is fixedly installed between the two side plates (7). Multiple connecting rods (6) are slidably connected on the installation plate (2). Limiting plates (4) are fixedly installed at the bottom of the multiple connecting rods (6). The top ends of the multiple connecting rods (6) are fixedly installed to the same movable plate (3). A fluidized bed (10) is rotatably connected on the movable plate (3). A first spring (5) is sleeved on the connecting rod (6). The two ends of the first spring (5) are fixedly connected to the limiting plate (4) and the installation plate (2) respectively.

3. The filter screen and fluidized bed dry coal preparation machine according to claim 2, characterized in that: A vibration motor (21) is fixedly installed on the movable plate (3). A through hole is provided on the mounting plate (2), through which the vibration motor (21) can pass.

4. The filter screen and fluidized bed dry coal preparation machine according to claim 2, characterized in that: An adjustment assembly is provided on the movable plate (3). The adjustment assembly includes a lead screw (20), a motor (18), a moving block (19), and a support rod (22). Two fixed plates (24) are fixedly installed on the moving block (19). The lead screw (20) is rotatably connected between the two fixed plates (24) through a bearing. The motor (18) is fixedly installed on one of the fixed plates (24). The output shaft of the motor (18) passes through the fixed plate (24) and is fixedly connected to the lead screw (20). The moving block (19) is threadedly connected to the lead screw (20). Two support rods (22) are rotatably connected to the moving block (19). Both support rods (22) are rotatably connected to the bottom end of the fluidized bed (10).

5. The filter screen and fluidized bed dry coal preparation machine according to claim 4, characterized in that: Two limiting rods (40) are fixedly installed between the two fixed plates (24), and the moving block (19) is slidably connected to the two limiting rods (40).

6. The filter screen and fluidized bed dry coal preparation machine according to claim 1, characterized in that: A fixed box (15) is fixedly installed on one side of the fluidized bed (10). The fixed box (15) has a gangue discharge port (16) and a coal discharge port (13). An extension plate (31) is fixedly installed on the fixed box (15). A screw (30) is threadedly connected to the inside of the extension plate (31). A handwheel (17) is fixedly installed at the bottom end of the screw (30). A baffle plate (14) is rotatably connected to the other end of the screw (30) through a bearing. The baffle plate (14) extends into the interior of the fixed box (15).

7. The filter screen and fluidized bed dry coal preparation machine according to claim 6, characterized in that: The inner wall of the extension plate (31) has two sliding grooves (29), and two sliders (28) are fixedly installed on the extension plate (31). The sliders (28) are slidably connected to the sliding grooves (29).

8. The filter screen and fluidized bed dry coal preparation machine according to claim 1, characterized in that: The fluidized bed (10) has three hot air pipes (26) and one cold air pipe (27) connected to its side wall. The three hot air pipes (26) are connected to the external hot air system, and the cold air pipe (27) is connected to the external cold air system.

9. The filter screen and fluidized bed dry coal preparation machine according to claim 1, characterized in that: The top of the fluidized bed (10) is connected to three exhaust pipes (12), which are connected to an external gas emission system.

10. The filter screen and fluidized bed dry coal preparation machine according to claim 1, characterized in that: The fluidized bed (10) is provided with a feed inlet (11).

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