Collaborative optimization deliming and upgrading method and device for fine coal

Abstract

The invention relates to the technical field of fine coal deliming and upgrading, in particular to a collaborative optimization deliming and upgrading method and device for fine coal, and the method comprises the following upgrading steps: S1, adding the fine coal into a treatment frame, and enabling a vibration table and a vibration rod to vibrate at high frequency; s2, electrifying the electrode, the electric rotating shaft and the upper polar plate, and spraying nitrogen to form an air flotation environment; s3, shaking off dust under the combined action of vibration, air floatation and a push plate, and ionizing nitrogen by an electrode to generate plasma; s4, injecting the plasma and the metal dust into a dust collection frame under the action of Lorentz force; s5, the non-metal dust is electrified through air flow and is blown away from the treatment frame by air flow; s6, high-density impurities sink to the bottom, and low-density fine coal goes across an inclined baffle and enters a storage frame to complete separation; and S7, opening the material storage frame to collect fine coal, and cleaning impurities in the dust collection frame and the treatment frame. Coal particle attachments are loosened through a composite acting force field, efficient dust removal is achieved through magnetoelectricity combination, air flotation circulation saves energy, efficiency and energy consumption are both considered in dynamic separation, and sustainable ash removal is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of fine coal deashing and quality improvement, and particularly to a method and device for collaborative optimization of deashing and quality improvement of fine coal. Background Art

[0002] With the development and application of coal mining technologies and methods, the quality of raw coal varies greatly, and the content of high-ash and low-quality coal increases. At present, the reserves of high-ash and low-quality coal are huge, accounting for about 40% of the total coal reserves. It mainly includes lignite, long-flame coal, non-caking coal, weakly caking coal, etc., with low metamorphism degree, high moisture content, and easy slimeification. In the process of coal combustion and utilization, for every 10% increase in ash content, the calorific value decreases by 500 kcal / kg - 750 kcal / kg, and the CO2 emission increases by 5% - 15%. Coal deashing is the source technology of clean coal, which can effectively remove impurities such as ash in coal, improve the quality of coal, and promote the transformation of coal resources from traditional fuels to clean fuels and high-quality raw materials.

[0003] The coal separation technology system mainly consists of three categories: physical separation, chemical separation, and biological separation. Among them, the physical separation method occupies more than 80% of the global coal preparation market share due to its high process maturity, low equipment investment, and low operating cost. However, the traditional physical separation method still has certain limitations. For example, the separation efficiency of fine coal (especially micron-sized particles) is relatively low, and it is easy to cause incomplete stratification due to the adhesion force or surface charge interference between particles. It is difficult to effectively separate coal with similar density from ash, and the ash residue is relatively high. At the same time, the traditional bag dust removal or electrostatic dust removal has low capture efficiency for micron-sized metal dust (such as pyrite particles), and it is easy to cause escape due to the unstable charging characteristics of the dust. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a method and device for collaborative optimization of deashing and quality improvement of fine coal.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A method for collaborative optimization of deashing and quality improvement of fine coal includes the following quality improvement steps: S1. Add fine coal into the treatment frame, start the drive motor, and make the vibrating table and vibrating rod generate high-frequency vibration synergistically; S2. Energize the electrode, electric rotating shaft, and upper plate, and at the same time spray high-speed nitrogen. The nitrogen forms an air flotation environment after spraying out from the air inlet cavity through the air outlet holes; S3. Under the combined action of vibration, air flotation, and agitation by the push plate, shake off the dust on the surface of the fine coal, and at the same time the electrode ionizes nitrogen to generate plasma; S4. The plasma and metal dust are accelerated into the dust collection frame under the action of the Lorentz force generated by the electrode, the upper plate, and the Halbach array permanent magnet; S5. The air flow caused by the movement of the plasma and metallic dust charges the surface of the non-metallic dust, which is blown away from the treatment frame under the push of the air flow; S6. Under the combined action of vibration, air flotation, and push plates, the high-density impurities sink to the bottom, and the low-density fine coal particles cross the inclined baffles with a gradually changing height, and are laterally displaced along the oblique component force to the storage frame, ensuring the completion of all sorting; S7. Open the opening and closing door of the storage frame to collect the deashed fine coal, and regularly clean the metallic dust in the dust collection frame and the high-density impurities at the bottom of the treatment frame; The quality improvement device used in the above-mentioned collaborative optimization method for deashing and quality improvement of fine coal during the quality improvement process includes an outer frame. An inclined installation plate is rotatably installed below the interior of the outer frame. Above the installation plate, there is a treatment frame with the same inclination angle and direction as it. A vibration mechanism is arranged between the treatment frame and the installation plate. A feed pipe communicating with its interior is fixedly installed on the front side of the outer frame. A nitrogen delivery mechanism is arranged below the interior of the treatment frame. A plurality of inclined baffles are fixedly installed at equal intervals on the inner bottom wall of the treatment frame. An electromagnetic acceleration mechanism is arranged above the interior of the treatment frame.

[0006] Preferably, one end of the bottom of the installation plate is fixedly connected to a support rod, the lower end of the support rod is rotatably connected to the inner bottom wall of the outer frame, and the other end of the installation plate is rotatably connected to the inner side wall of the outer frame.

[0007] Preferably, the vibration mechanism includes two groups of triangular platforms fixedly installed on the front and rear sides of the upper end of the installation plate. Each group of triangular platforms consists of two symmetrically arranged triangular platforms. A vibration rod is rotatably installed on each triangular platform, and the top end of the vibration rod is fixedly connected to the lower end of the treatment frame. A vibration component is arranged between the two triangular platforms close to the feed pipe side.

[0008] Preferably, the vibration component includes a vibration platform fixedly installed between the two triangular platforms. The vibration platform is driven by a drive motor fixedly installed on one of the triangular platforms. The upper end of the vibration platform is in contact with the lower surface of the treatment frame, and a buffer pad is arranged between them.

[0009] Preferably, the nitrogen delivery mechanism includes a plurality of air inlet cavities uniformly opened below the interior of the treatment frame. One side of the air inlet cavity is closed, and the other side is connected to an air inlet pipe. The end of the air inlet pipe away from the air inlet cavity penetrates the side wall of the outer frame and is connected to an external nitrogen delivery device. A plurality of air outlet holes are uniformly arranged between adjacent two inclined baffles on the inner bottom wall of the treatment frame. The air outlet holes are internally communicated with the corresponding air inlet cavities.

[0010] Preferably, the plurality of inclined baffles are parallel to each other, and the height of each inclined baffle gradually decreases along the inclined direction of the treatment frame.

[0011] Preferably, a plurality of electric rotating shafts are rotatably installed at equal intervals on the upper surface of each inclined baffle, and a push plate is fixedly connected to the electric rotating shaft.

[0012] Preferably, the electromagnetic acceleration mechanism includes an electrode fixedly connected to the top end of the electric rotating shaft, an upper electrode plate fixedly installed above the interior of the outer frame, and fixed frames provided above the left and right sides of the outer frame and fixedly installed on the inner side wall of the outer frame. Permanent magnets arranged in a Halbach array are provided on one side of the two fixed frames close to each other.

[0013] Preferably, a dust suction frame for storing the ejected metal dust is fixedly installed above the rear side wall of the outer frame, and a discharge port communicating with the interior thereof is fixedly installed below the rear side wall of the outer frame. The impurities inside the treatment frame enter the discharge port after leaving the treatment frame.

[0014] Preferably, a storage frame is fixedly installed on the side wall of the outer frame away from the air inlet cavity, and the storage frame communicates with the upper part inside the treatment frame, so that the fine coal enters the storage frame under the guidance of the inclined baffle.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. In this application, high-frequency vibration is combined with air flotation disturbance and transverse mechanical agitation to form a composite force field, effectively loosening the attachments on the surface of coal particles and reducing the friction between particles. The cooperation between the vibration table and the vibration rod generates high-frequency micro-amplitude vibration to promote the peeling of dust on the surface of coal particles; the high-speed nitrogen jet forms an air flotation layer, which not only lifts the light coal particles to float, but also enhances the dust desorption through the air flow shear force. The rotation and agitation of the push plate increase the diversity of the movement trajectories of coal particles, expose more hidden surfaces, and further improve the ash removal effect. During the density separation process, the stratification effect generated by vibration is combined with the air flotation lifting force, so that the low-density coal particles quickly float up and are separated through the dynamic separation channel, while the high-density impurities sink to the bottom, realizing precise separation.

[0016] 2. In this application, the plasma generated by ionizing nitrogen imparts charges to the metal dust, and under the synergistic action of the Lorentz force and the magnetic field, it is accelerated and injected into the dust suction device, realizing the efficient capture of metal dust. The non-metal dust migrates through the combined action of aerodynamic and electrostatic adsorption. The plate electrode electric field regulates the trajectories of charged particles to form a multi-stage dust removal network. The closed-loop nitrogen circulation system ensures that the dust is treated in a fully enclosed manner to avoid external escape and pollution. At the same time, the permanent magnet array optimizes the magnetic field distribution, significantly enhancing the dust removal efficiency.

[0017] 3. In this application, low-density coal particles quickly respond to the lateral component force in the combined field of vibration and air flotation, and are efficiently separated along the oblique guiding path, while high-density impurities sink to the bottom due to inertial differences. The vibration, plasma generation, and gas circulation modules cooperate to optimize energy consumption. Nitrogen is recycled after multiple filtrations, significantly reducing resource consumption. Through the dynamic matching of sorting parameters, the overall process takes into account both processing efficiency and energy utilization rate, achieving intensification and sustainability in the sorting process. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall axonometric structure of a collaborative optimization deashing and quality-improving device for fine coal proposed by the present invention.

[0019] Figure 2 It is a schematic diagram of the overall back structure of a collaborative optimization deashing and quality-improving device for fine coal proposed by the present invention.

[0020] Figure 3 It is a schematic diagram of the internal structure of the outer frame of a collaborative optimization deashing and quality-improving device for fine coal proposed by the present invention.

[0021] Figure 4 It is a schematic diagram of the installation table and support rod structure of a collaborative optimization deashing and quality-improving device for fine coal proposed by the present invention.

[0022] Figure 5 It is a schematic diagram of the fixed frame and permanent magnet structure of a collaborative optimization deashing and quality-improving device for fine coal proposed by the present invention.

[0023] Figure 6 It is a schematic diagram of the air outlet and inclined baffle structure of a collaborative optimization deashing and quality-improving device for fine coal proposed by the present invention.

[0024] Figure 7 It is a schematic diagram of the push plate and electric rotating shaft structure of a collaborative optimization deashing and quality-improving device for fine coal proposed by the present invention.

[0025] In the figure: 1 outer frame, 2 discharge port, 3 dust suction frame, 4 feed pipe, 5 fixed frame, 6 permanent magnet, 7 air inlet pipe, 8 storage frame, 9 opening and closing door, 10 upper electrode plate, 11 mounting plate, 12 support rod, 13 triangular platform, 14 drive motor, 15 vibration table, 16 vibration rod, 17 treatment frame, 18 air inlet cavity, 19 air outlet, 20 inclined baffle, 21 electric rotating shaft, 22 push plate, 23 electrode. Detailed Description of the Embodiment

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0027] A collaborative optimization method for deashing and upgrading fine coal, comprising the following steps: S1. Add fine coal into the processing frame 17, start the driving motor 14, and enable the vibrating table 15 and the vibrating rod 16 to jointly generate high-frequency vibration; S2. Energize the electrode 23, the electric rotating shaft 21, and the upper plate 10, and simultaneously spray high-speed nitrogen. The nitrogen sprays out from the air inlet cavity 18 through the air outlet holes 19 to form an air flotation environment; S3. Under the combined action of vibration, air flotation, and agitation by the push plate 22, shake off the dust on the surface of the fine coal, increase the diversity of the movement of the fine coal, strengthen the detachment of the dust, and at the same time, the electrode 23 ionizes nitrogen to generate plasma; S4. The plasma and metal dust are accelerated into the dust collection frame 3 under the action of the Lorentz force generated by the electrode 23, the upper plate 10, and the Halbach array permanent magnet 6; S5. The air flow caused by the movement of the plasma and metal dust makes the surface of the non-metal dust charged, and it is blown away from the processing frame 17 under the push of the air flow; S6. Under the combined action of vibration, air flotation, and the push plate 22, make the high-density impurities sink to the bottom, and the low-density fine coal crosses the inclined baffle 20 with a gradually changing height, and is laterally displaced along the oblique component force to the storage frame 8 to ensure the completion of all sorting; S7. Open the opening and closing door 9 of the storage frame 8 to collect the deashed fine coal, and regularly clean the metal dust in the dust collection frame 3 and the high-density impurities at the bottom of the processing frame 17.

[0028] Refer to Figures 1 to 7 , a collaborative optimization device for deashing and upgrading fine coal, comprising an outer frame 1. An inclined installation plate 11 is rotatably installed below the interior of the outer frame 1. One end of the bottom of the installation plate 11 is fixedly connected to a support rod 12. The lower end of the support rod 12 is rotatably connected to the inner bottom wall of the outer frame 1. The other end of the installation plate 11 is rotatably connected to the inner side wall of the outer frame 1, so that the staff can freely adjust the rotation angle of the installation plate 11 and then lock it.

[0029] On both the front and rear sides of the upper end of the mounting plate 11, there are fixedly installed two symmetrically arranged triangular platforms 13. A vibrating rod 16 is rotatably installed on each triangular platform 13. The tops of multiple vibrating rods 16 are commonly fixedly installed with a processing frame 17. The inclination angle and direction of the processing frame 17 are basically the same as those of the mounting plate 11. A driving motor 14 is fixedly installed on one of the triangular platforms 13 on the lower side of the mounting plate 11. A vibrating table 15 is fixedly installed between the two triangular platforms 13. The vibrating table 15 is driven by the above-mentioned driving motor 14. The vibrating table 15 is a prior art, and its specific structural design will not be elaborated here. Under the action of the driving motor 14, high-frequency vibration can be generated, so that the processing frame 17 has a tendency to jitter obliquely upward. The upper end (i.e., the working end) of the vibrating table 15 contacts the lower surface of the processing frame 17. In order to avoid rigid contact between the vibrating table 15 and the processing frame 17, a buffer pad, shock-absorbing pad, etc. can be laid on the upper end surface of the vibrating table 15 to reduce the damage to the vibrating table 15 and the processing frame 17 itself.

[0030] A plurality of air inlet chambers 18 are evenly opened below the inner part of the processing frame 17. One side of the air inlet chamber 18 is closed, and the other side is connected with an air inlet pipe 7. The air inlet pipe 7 is a hose made of soft material. The other end of the air inlet pipe 7 penetrates through the side wall of the outer frame 1 and is connected with an external nitrogen delivery device. The external nitrogen delivery device can input nitrogen at high speed into the air inlet pipe 7. On the inner bottom wall of the processing frame 17, a plurality of inclined baffles 20 are fixedly installed at equal intervals (as shown in the attached Figure 5 description). The plurality of inclined baffles 20 are parallel to each other, and the height of each inclined baffle 20 gradually decreases along the inclination direction of the processing frame 17. A plurality of air outlet holes 19 opened on the inner bottom wall of the processing frame 17 are evenly arranged between two adjacent inclined baffles 20. The air outlet holes 19 are internally communicated with the corresponding air inlet chambers 18, so that the high-speed nitrogen entering the air inlet chambers 18 can enter the upper part inside the processing frame 17 through the air outlet holes 19.

[0031] At the upper end surface of each inclined baffle 20, a plurality of electric rotating shafts 21 are rotatably installed at equal intervals. A push plate 22 is fixedly connected to the electric rotating shaft 21. The push plate 22 rotates along with the electric rotating shaft 21, which can assist the fine coal in lateral movement, increase the diversity of the movement of the fine coal, and better enable the dust on the surface of the fine coal to be blown out by the air flow. The top end of the electric rotating shaft 21 is fixedly connected with an electrode 23, and the electrode 23 is used to ionize the nitrogen entering the upper part inside the treatment frame 17 to generate plasma. Above the treatment frame 17, an upper electrode plate 10 fixedly installed above the inner part of the outer frame 1 is provided. On the upper parts of the left and right sides of the outer frame 1, fixed frames 5 fixedly installed on the inner side walls of the outer frame 1 are provided. On one side of the two fixed frames 5 close to each other, permanent magnets 6 arranged in a Halbach array are provided. The permanent magnets 6 cooperate with the electrode 23 and the upper electrode plate 10, etc., so as to accelerate the plasma and metal dust under the action of the Lorentz force and make them shoot forward quickly. Above the rear side wall of the outer frame 1, a dust suction frame 3 is fixedly installed, and the dust suction frame 3 is used to store the ejected metal dust.

[0032] On the front side of the outer frame 1, a feed pipe 4 fixedly connected to its interior is installed. The output end of the feed pipe 4 is located above the interior of the treatment frame 17. On the side wall of the outer frame 1 far from the air inlet cavity 18, a storage frame 8 is fixedly installed, and the storage frame 8 is communicated with the upper part inside the treatment frame 17, so that the fine coal can enter the storage frame 8 under the guidance of the inclined baffle 20. One side of the storage frame 8 is rotatably installed with an opening and closing door 9 through a rotating shaft. Below the rear side wall of the outer frame 1, a discharge port 2 fixedly connected to its interior is installed. The impurities inside the treatment frame 17 enter the discharge port 2 after leaving the treatment frame 17.

[0033] When the present invention is in use, the support rod 12 raises the mounting plate 11 by a certain angle to facilitate sorting inside the treatment frame 17. The fine coal is added into the treatment frame 17 through the feed pipe 4. The driving motor 14 is started to make the vibrating table 15 start vibrating, and cooperate with the vibrating rod 16 installed at a certain angle by the triangular table 13 to perform high-frequency vibration back and forth. The electrode 23, the electric rotating shaft 21 and the upper electrode plate 10 are powered on, and high-speed nitrogen is sprayed into the air inlet pipe 7.

[0034] After the high-speed nitrogen enters the air inlet cavity 18, it sprays out from the air outlet holes 19; under the action of the high-frequency vibration of the treatment frame 17 and the air flotation sprayed out from the air outlet holes 19, the fine coal sorts out impurities with larger density and discharges the dust at the same time.

[0035] Since the fine coal is vibrating at high frequency, dust will be shaken out. Moreover, the gas ejected from the bottom air holes 19 will further assist in the escape of dust. The push plate 22 driven by the electric rotating shaft 21 rotates, which can also assist the fine coal in lateral movement, increasing the diversity of the movement of the fine coal and better enabling the dust on the surface of the fine coal to be blown out by the air flow. When the dust is blown to the area between the upper electrode plate 10 and the treatment frame 17, since the electrode 23 has been ionizing the nitrogen gas inside the ionization device to generate plasma, the plasma and the metal dust will be accelerated and shot forward like an electromagnetic gun under the action of the Lorentz force generated by the electrode 23, the upper electrode plate 10 and the permanent magnets 6 arranged in a Halbach array on both sides. In this way, the metal dust will be shot into the dust collection frame 3. At the same time, during the movement of the plasma and the metal dust, air flow is generated, which can make the surface of the non-metal dust charged. Under the push of the air flow, the non-metal dust will also be blown away, thus completing the ash removal and quality improvement of the surface of the fine coal.

[0036] Under the combined action of the vibration of the vibrating table 15, the air flotation of the air holes 19, and the agitation of the push plate 22, impurities with a larger density will sink to the bottom, while the fine coal with a smaller density will accumulate above the impurities. Soon, the fine coal with a smaller density will exceed the height of the inclined baffle 20 and roll over from above the inclined baffle 20. The height of the inclined baffle 20 gradually decreases to ensure that the sorting can be completed entirely in the latter section of the treatment frame 17. In the case of the inclined installation of the inclined baffle 20, when the fine coal moves along the inclined baffle 20, the fine coal with a smaller density is more likely to respond to the oblique guidance of the inclined baffle 20 due to its larger acceleration. Because the inclined baffle 20 in the oblique direction will give the fine coal a lateral component force, the fine coal with a smaller density can more quickly generate a lateral displacement under the action of this lateral component force, so that the fine coal can fall into the storage frame 8 from the side, and then the opening and closing door 9 can be opened for collection.

[0037] The gas entering the dust collection frame 3 from the outer frame 1 will be recycled by passing the treated nitrogen gas back into the intake cavity 18 through the intake pipe 7 after passing through an external air treatment device.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, should be covered by the protection scope of the present invention.

Claims

1. A method for collaboratively optimizing deashing and upgrading of fine coal, characterized in that: The quality improvement steps include: S1, adding fine coal into the processing frame (17), starting the driving motor (14), so that the vibration table (15) and the vibration rod (16) cooperate to generate high-frequency vibration; S2, energizing the electrode (23), the electric rotating shaft (21) and the upper electrode plate (10), and simultaneously injecting high-speed nitrogen gas, wherein the nitrogen gas is ejected from the gas outlet (19) through the gas inlet cavity (18) to form a gas flotation environment; S3, under the combined action of vibration, air flotation and stirring of the push plate (22), dust on the surface of the fine coal particles is shaken off, and at the same time, the electrode (23) ionizes nitrogen to generate plasma; S4, plasma and metal dust are accelerated and ejected into the dust collection frame (3) under the action of the Lorentz force generated by the electrode (23), the upper plate (10) and the Halbach array permanent magnet (6); S5, the air flow caused by the movement of plasma and metal dust causes the surface of non-metallic dust to be charged and blown away from the processing frame (17) under the push of the air flow; S6. Under the combined action of vibration, air flotation and the push plate (22), high-density impurities are sunk to the bottom, and low-density fine coal particles pass over the inclined baffle (20) with a gradually changing height, and are guided by the oblique component force to move laterally to the storage frame (8), ensuring that all sorting is completed; S7, opening the opening and closing door (9) of the material storage frame (8) to collect the deashed fine coal particles, and regularly cleaning the metal dust in the dust collection frame (3) and the high-density impurities at the bottom of the processing frame (17); The upgrading device used in the upgrading process of the above-mentioned synergistic optimization deashing and upgrading method for fine coal comprises an outer frame (1), a mounting plate (11) arranged in an inclined manner is rotatably mounted at the lower part of the outer frame (1), a processing frame (17) whose inclination angle and direction are consistent with the mounting plate (11) is arranged above the mounting plate (11), a vibration mechanism is arranged between the processing frame (17) and the mounting plate (11), a feed pipe (4) connected to the interior of the outer frame (1) is fixedly mounted on the front side of the outer frame (1), a nitrogen conveying mechanism is arranged at the lower part of the processing frame (17), a plurality of inclined baffles (20) are fixedly mounted at equal intervals on the inner bottom wall of the processing frame (17), and an electromagnetic acceleration mechanism is arranged at the upper part of the processing frame (17).

2. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 1, characterized in that: A support rod (12) is fixedly connected to the bottom of one end of the mounting plate (11); the lower end of the support rod (12) is rotatably connected to the inner bottom wall of the outer frame (1); and the other end of the mounting plate (11) is rotatably connected to the inner side wall of the outer frame (1).

3. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 1, characterized in that: The vibration mechanism comprises two sets of triangular platforms (13) fixedly mounted on the front and rear sides of the upper end of the mounting plate (11), each set of triangular platforms (13) comprising two triangular platforms (13) arranged symmetrically, a vibration rod (16) being rotatably mounted on each triangular platform (13), the top end of the vibration rod (16) being fixedly connected to the lower end of the processing frame (17), and a vibration component being arranged between the two triangular platforms (13) on the side close to the feed pipe (4).

4. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 3, characterized in that: The vibration assembly comprises a vibration table (15) fixedly mounted between two triangular tables (13); the vibration table (15) is driven by a drive motor (14) fixedly mounted on one of the triangular tables (13); the upper end of the vibration table (15) contacts the lower surface of the processing frame (17), and a buffer pad is provided between the two.

5. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 1, characterized in that: The nitrogen delivery mechanism comprises a plurality of air inlet cavities (18) uniformly arranged at the lower part of the processing frame (17); one side of the air inlet cavity (18) is closed and the other side is connected to an air inlet pipe (7); an end of the air inlet pipe (7) away from the air inlet cavity (18) passes through a side wall of the outer frame (1) and is connected to an external nitrogen delivery device; a plurality of air outlet holes (19) uniformly arranged on the inner bottom wall of the processing frame (17) are arranged between two adjacent inclined baffles (20); the air outlet holes (19) are connected to the inside of the corresponding air inlet cavity (18).

6. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 1, characterized in that: The plurality of inclined baffles (20) are parallel to each other, and the height of each inclined baffle (20) gradually decreases along the inclination direction of the processing frame (17).

7. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 6, characterized in that: A plurality of electric rotating shafts (21) are rotatably mounted at equal intervals on the upper end surface of each inclined baffle (20), and a push plate (22) is fixedly connected to the electric rotating shaft (21).

8. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 7, characterized in that: The electromagnetic acceleration mechanism comprises an electrode (23) fixedly connected to the top of the electric rotating shaft (21), an upper pole plate (10) fixedly mounted on the upper part of the outer frame (1), and a fixed frame (5) arranged above the left and right sides of the outer frame (1) and fixedly mounted on the inner wall of the outer frame (1), and permanent magnets (6) arranged in a Halbach array are arranged on one side of the two fixed frames (5) close to each other.

9. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 1, characterized in that: A dust collecting frame (3) for storing ejected metal dust is fixedly mounted above the rear side wall of the outer frame (1), and a discharge port (2) connected to the interior of the outer frame (1) is fixedly mounted below the rear side wall of the outer frame (1); impurities inside the processing frame (17) leave the processing frame (17) and enter the discharge port (2).

10. The device for collaboratively optimizing deashing and upgrading fine coal according to claim 5, characterized in that: A storage frame (8) is fixedly mounted on a side wall of one end of the outer frame (1) away from the air inlet chamber (18); the storage frame (8) is connected to the upper interior of the processing frame (17), so that fine coal enters the storage frame (8) under the guidance of the inclined baffle (20).

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