Coal desulfurization device for thermal power

Abstract

The application relates to the technical field of coal desulfurization, in particular to a coal desulfurization device for thermal power, which comprises a crushing box chamber, a crushed material discharge pipe, a feeding top frame, a high-pressure expansion tank, a crushing assembly and a magnetic separation assembly, the crushed material discharge pipe is fixedly connected to the inner bottom side of the crushing box chamber, the feeding top frame is arranged below the top of the crushed material discharge pipe, and the high-pressure expansion tank is arranged outside the magnetic separation assembly. The coal desulfurization device for thermal power can efficiently remove most of the inorganic sulfur in the form of pyrite at first. This greatly reduces the processing load of the subsequent chemical desulfurization unit. The washing rod driven by the integrated driving motor in the high-pressure expansion tank can directly perform water washing in the same container after the reaction, the generated soluble salts are filtered out, the reaction-washing integration is realized, the material transfer link is reduced, and the automation degree is improved.

Description

Technical Field

[0001] This application relates to the field of coal desulfurization technology, and in particular to a coal desulfurization device for thermal power plants. Background Technology

[0002] Because coal contains sulfur, and high-sulfur coal with a sulfur content of up to 2% accounts for a considerable portion of my country's proven coal reserves, the sulfur in coal will produce a large amount of sulfur dioxide gas during the direct combustion of coal, which will cause serious pollution to the environment.

[0003] A search revealed that CN221940397U discloses a coal desulfurization treatment device, including a crushing reaction cylinder, a crushing agitator, a receiving box, and a return pipe. The device is characterized by including a dust cover mounted above the receiving box, which is movably connected to the receiving box. The dust cover includes a shell with an opening on one side and an atomizing pipe disposed inside the shell. The opening side of the shell faces the crushing reaction cylinder. Based on existing technology, this improves the structure of the coal desulfurization treatment device by adding the dust cover to prevent coal dust from dispersing around the device during feeding. Furthermore, the atomizing pipe, which contains desulfurization components, sprays atomized desulfurizing agent, thereby isolating dust and effectively improving the working environment of the entire device.

[0004] Regarding the aforementioned technologies, the inventors believe that the following technical defects exist that need improvement: Although the above-mentioned device adds a crushing function, it only solves the problem of dust dispersion in coal by using a desulfurizing agent. Since the desulfurization process needs to be carried out under high pressure, and the above-mentioned device relies on natural reaction, the reaction speed is extremely slow and the processing cycle is long, thus greatly reducing the actual desulfurization effect. Utility Model Content

[0005] This application provides a coal desulfurization device for thermal power plants to improve the following technical problems: Although the above-mentioned device adds a crushing function, it only solves the problem of dust dispersion in coal by using a desulfurizing agent. Since the desulfurization process needs to be carried out under high pressure, and the above-mentioned device uses natural reaction, the reaction speed is extremely slow and the processing cycle is long, so the actual desulfurization effect is greatly reduced.

[0006] This application provides a coal desulfurization device for thermal power plants, which adopts the following technical solution:

[0007] A coal desulfurization device for thermal power plants includes a crushing chamber, a crushed material pipe, a feeding top frame, a high-pressure expansion tank, a crushing assembly, and a magnetic separation assembly. The crushed material pipe is fixedly connected to the bottom inner side of the crushing chamber. The feeding top frame is located below the top of the crushed material pipe. The magnetic separation assembly is installed at the bottom of the feeding top frame. The high-pressure expansion tank is located outside the magnetic separation assembly. The crushing assembly is installed inside the crushing chamber.

[0008] In one feasible technical solution of this application, the magnetic separation assembly includes a DC motor, a hollow cover, a thrust bearing, a fixed shaft, and an electromagnet. The DC motor is installed on the outside of the crushing chamber. The hollow cover is fixedly connected to the outside of the output end of the DC motor. The fixed shaft is rotatably connected to the inside of the hollow cover. The thrust bearing is fixedly connected to one end of the fixed shaft and is used to prevent the fixed shaft from rotating with the hollow cover. The electromagnet is fixedly connected to the outside of the fixed shaft and is used to generate a magnetic field.

[0009] In one feasible technical solution of this application, the crushing component includes an asynchronous motor, a rigid shaft, crushing teeth, and a transmission gear. The asynchronous motor is installed on the outside of the crushing chamber. One end of the rigid shaft is fixedly connected to the output end of the asynchronous motor. The crushing teeth are welded to the outer wall of the rigid shaft. The transmission gear is meshed with the outside of the rigid shaft.

[0010] In one feasible technical solution of this application, a material pump for providing negative pressure is also installed on the outer side of the crushing chamber near the crushing pipe.

[0011] In one feasible technical solution of this application, a collection frame for receiving coal particles is also provided below the feed top frame.

[0012] In one feasible technical solution of this application, a drive motor, a corrosion-resistant shaft and a washing rod are further provided in the middle of the high-pressure expansion tank. The drive motor is installed on the top of the high-pressure expansion tank, the corrosion-resistant shaft is fixedly connected below the output end of the drive motor, and the washing rod is fixedly connected to the outer wall of the corrosion-resistant shaft and is used for washing the coal after alkali leaching with water.

[0013] In one feasible technical solution of this application, a conveying pipe and a feeding pump are also provided on the opposite sides of the high-pressure expansion tank and the collecting frame. The feeding pump is installed on the outside of the conveying pipe, and the two ends of the conveying pipe are respectively in close contact with the inner surfaces of the high-pressure expansion tank and the collecting frame.

[0014] In one feasible technical solution of this application, a flared disc for adsorbing pyrite is also provided on the outer side of the hollow shroud.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] This device provides the necessary and controllable high-pressure environment for the alkaline leaching and oxidative desulfurization reactions of coal through a high-pressure expansion tank. The entire process of coal crushing, magnetic separation, conveying, and high-pressure reaction takes place within a closed container and pipelines. Combined with the negative pressure provided by the pump, this not only achieves automatic material transfer but also fundamentally eliminates the leakage of coal dust. An asynchronous motor drives a rigid shaft and crushing teeth, combined with transmission gears, providing powerful crushing capabilities and increasing the reaction surface area for subsequent reactions. The magnetic separation component efficiently removes most of the inorganic sulfur present in the form of pyrite. This significantly reduces the processing load on the subsequent chemical desulfurization unit. The high-pressure expansion tank integrates a motor-driven washing rod, allowing for direct water washing in the same container after the reaction to filter out the generated soluble salts. This achieves integrated "reaction-washing," reducing material transfer steps and improving automation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0018] Figure 1 This is a schematic diagram of the structure of a coal desulfurization device for thermal power plants according to an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the structure of the crushing component in the embodiments of this application.

[0020] Figure 3 This is a schematic diagram of the internal structure of the high-pressure expansion tank in an embodiment of this application.

[0021] Figure 4 This is a cross-sectional view of the magnetic separation component in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Crushing chamber; 2. Crushed material discharge pipe; 3. Feed top frame; 4. High-pressure expansion tank;

[0024] 5. Crushing assembly; 51. Asynchronous motor; 52. Rigid shaft; 53. Crushing teeth; 54. Transmission gear;

[0025] 6. Magnetic separation assembly; 61. DC motor; 62. Hollow casing; 63. Thrust bearing; 64. Fixed shaft; 65. Electromagnet;

[0026] 7. Feed pump; 8. Collection frame; 9. Drive motor; 10. Corrosion-resistant shaft; 11. Washing rod; 12. Feeding pipe; 13. Feed pump; 14. Flared disc. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] This application discloses a coal desulfurization device for thermal power plants. (Refer to...) Figures 1 to 4 The coal desulfurization device for thermal power includes a crushing chamber 1, a crushing pipe 2, a feeding top frame 3, a high-pressure expansion tank 4, a crushing component 5, and a magnetic separation component 6. The crushing pipe 2 is fixedly connected to the bottom inner side of the crushing chamber 1. The feeding top frame 3 is located below the top of the crushing pipe 2. The magnetic separation component 6 is installed at the bottom of the feeding top frame 3. The high-pressure expansion tank 4 is located outside the magnetic separation component 6. The crushing component 5 is installed inside the crushing chamber 1.

[0033] The magnetic separation assembly 6 includes a DC motor 61, a hollow cover 62, a thrust bearing 63, a fixed shaft 64, and an electromagnet 65. The DC motor 61 is installed on the outside of the crushing chamber 1. The hollow cover 62 is fixedly connected to the outside of the output end of the DC motor 61. The fixed shaft 64 is rotatably connected to the inside of the hollow cover 62. The thrust bearing 63 is fixedly connected to one end of the fixed shaft 64 and is used to prevent the fixed shaft 64 from rotating with the hollow cover 62. The electromagnet 65 is fixedly connected to the outside of the fixed shaft 64 and is used to generate a magnetic field.

[0034] The electromagnet 65 allows for easy adjustment of the magnetic field strength by regulating the current, enabling the equipment to flexibly handle coal raw materials with different sulfur contents and mineral compositions, thus enhancing its adaptability. The DC motor 61 drives the hollow cover 62 to rotate, while the internal fixed shaft 64 and the electromagnet 65 remain stationary through the thrust bearing 63. This ensures both magnetic field stability and allows the flared disc 14, which has adsorbed magnetic minerals, to rotate to a specific position for unloading.

[0035] The crushing assembly 5 includes an asynchronous motor 51, a rigid shaft 52, crushing teeth 53, and a transmission gear 54. The asynchronous motor 51 is installed on the outside of the crushing chamber 1. One end of the rigid shaft 52 is fixedly connected to the output end of the asynchronous motor 51. The crushing teeth 53 are welded to the outer wall of the rigid shaft 52. The transmission gear 54 is meshed with the outside of the rigid shaft 52.

[0036] An asynchronous motor 51 drives a rigid shaft 52 and a crushing tooth 53, which, together with a transmission gear 54, provides powerful crushing capability and increases the reaction surface area for subsequent reactions.

[0037] A material pump 7 for providing negative pressure is also installed on the outside of the crushing chamber 1 near the crushing pipe 2.

[0038] Below the feed top frame 3, there is also a collection frame 8 for receiving coal particles.

[0039] The high-pressure expansion tank 4 is also equipped with a drive motor 9, a corrosion-resistant shaft 10 and a washing rod 11 in the middle. The drive motor 9 is installed on the top of the high-pressure expansion tank 4. The corrosion-resistant shaft 10 is fixedly connected to the output end of the drive motor 9. The washing rod 11 is fixedly connected to the outer wall of the corrosion-resistant shaft 10 and is used for washing the coal after alkali leaching with water.

[0040] According to the principles of chemical reaction kinetics, increasing pressure can significantly increase the concentration of reactants and the collision frequency, thereby greatly accelerating the reaction process. This causes the reaction rate of pyrite converting into soluble sodium sulfide and organic sulfur being oxidized into sulfate to increase by orders of magnitude.

[0041] On the opposite sides of the high-pressure expansion tank 4 and the collection frame 8, there are also conveying pipes 12 and feeding pumps 13. The feeding pumps 13 are installed on the outside of the conveying pipes 12, and the two ends of the conveying pipes 12 are tightly fitted to the inner surfaces of the high-pressure expansion tank 4 and the collection frame 8, respectively.

[0042] The outer side of the hollow hood 62 is also provided with a flared disc 14 for adsorbing pyrite.

[0043] The general process of using the coal desulfurization device for thermal power plants in this embodiment is as follows:

[0044] Coal first enters the system through the feed top frame 3. The feed top frame 3 is located below the top of the crushing pipe 2, providing a passage for the coal to enter subsequent processing stages. The coal enters the crushing chamber 1, where the crushing assembly 5 crushes it. An asynchronous motor 51 is installed on the outside of the crushing chamber 1, providing power for the crushing operation. One end of a rigid shaft 52 is fixedly connected to the output end of the asynchronous motor 51 and rotates under the drive of the asynchronous motor 51. Crushing teeth 53 are welded to the outer wall of the rigid shaft 52. As the rigid shaft 52 rotates, the crushing teeth 53 forcefully crush the coal, breaking it into coal particles of suitable size. A magnetic separation assembly 6 is installed at the bottom of the feed top frame 3 to begin magnetic separation of the coal. In this assembly, a DC motor 61 is installed on the outside of the crushing chamber 1, serving as the power source to drive the entire magnetic separation process. A hollow cover 62 is fixedly connected to the outside of the output end of a DC motor 61 and rotates with the DC motor 61. A fixed shaft 64 is rotatably connected inside the hollow cover 62. A thrust bearing 63 is fixedly connected to one end of the fixed shaft 64 to prevent the fixed shaft 64 from rotating with the hollow cover 62 and to ensure the stability of the fixed shaft 64. An electromagnet 65 is fixedly connected to the outside of the fixed shaft 64 and generates a strong magnetic field when energized. A flared disc 14 is provided on the outside of the hollow cover 62 to expand the adsorption range and effectively adsorb magnetic substances such as pyrite in the coal, achieving preliminary separation of coal from magnetic impurities. Low-sulfur coal can be discharged through the recovery device to the collection frame 8, while the sulfur-containing coal particles after crushing and magnetic separation are discharged through the crushing pipe 2. The crushing pipe 2 is fixedly connected to the bottom inside of the crushing chamber 1. A suction pump 7 is installed on the outside of the crushing pipe 2 near the crushing chamber 1. The suction pump 7 provides negative pressure to accelerate the discharge of coal particles and ensure that the crushed coal particles can smoothly enter the next stage. In the high-pressure expansion tank 4, coal particles undergo alkali leaching to further remove sulfur. A drive motor 9, a corrosion-resistant shaft 10, and a washing rod 11 are located in the middle of the high-pressure expansion tank 4. The drive motor 9 is mounted on top of the high-pressure expansion tank 4, serving as the power source to drive the washing process. The corrosion-resistant shaft 10 is fixedly connected below the output end of the drive motor 9, and the washing rod 11 is fixedly connected to the outer wall of the corrosion-resistant shaft 10. Driven by the drive motor 9, the corrosion-resistant shaft 10 drives the washing rod 11 to rotate, washing the alkali-leached coal with water to remove residual alkali and impurities, ultimately obtaining clean desulfurized coal and completing the entire series of desulfurization operations.

[0045] The beneficial technical effects of the coal desulfurization device for thermal power plants in this application embodiment are roughly as follows:

[0046] This device provides the necessary and controllable high-pressure environment for the alkaline leaching and oxidative desulfurization reactions of coal through the high-pressure expansion tank 4. The entire process of coal crushing, magnetic separation, conveying, and high-pressure reaction is carried out in a closed container and pipeline. Combined with the negative pressure provided by the pump 7, not only is automatic material transfer achieved, but the leakage of coal dust is also fundamentally prevented. The asynchronous motor 51 drives the rigid shaft 52 and crushing teeth 53, combined with the transmission gear 54, providing powerful crushing capabilities and increasing the reaction surface area for subsequent reactions. The magnetic separation component 6 can efficiently remove most of the inorganic sulfur present in the form of pyrite. This greatly reduces the processing load of the subsequent chemical desulfurization unit. The high-pressure expansion tank 4 integrates a washing rod 11 driven by the drive motor 9, which can directly perform water washing in the same container after the reaction, filtering out the generated soluble salts. This achieves integrated "reaction-washing," reduces material transfer steps, and improves the degree of automation.

[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coal desulfurization device for thermal power plants, characterized in that, The device includes a crushing chamber (1), a crushing pipe (2), a feeding top frame (3), a high-pressure expansion tank (4), a crushing assembly (5), and a magnetic separation assembly (6). The crushing pipe (2) is fixedly connected to the bottom inner side of the crushing chamber (1). The feeding top frame (3) is located below the top of the crushing pipe (2). The magnetic separation assembly (6) is installed at the bottom of the feeding top frame (3). The high-pressure expansion tank (4) is located on the outside of the magnetic separation assembly (6). The crushing assembly (5) is installed inside the crushing chamber (1).

2. The coal desulfurization device for thermal power plants according to claim 1, characterized in that, The magnetic separation assembly (6) includes a DC motor (61), a hollow cover (62), a thrust bearing (63), a fixed shaft (64), and an electromagnet (65). The DC motor (61) is installed on the outside of the crushing chamber (1). The hollow cover (62) is fixedly connected to the outside of the output end of the DC motor (61). The fixed shaft (64) is rotatably connected to the inside of the hollow cover (62). The thrust bearing (63) is fixedly connected to one end of the fixed shaft (64) and is used to prevent the fixed shaft (64) from rotating with the hollow cover (62). The electromagnet (65) is fixedly connected to the outside of the fixed shaft (64) and is used to generate a magnetic field.

3. The coal desulfurization device for thermal power plants according to claim 1, characterized in that, The crushing assembly (5) includes an asynchronous motor (51), a rigid shaft (52), crushing teeth (53), and a transmission gear (54). The asynchronous motor (51) is installed on the outside of the crushing chamber (1). One end of the rigid shaft (52) is fixedly connected to the output end of the asynchronous motor (51). The crushing teeth (53) are welded to the outer wall of the rigid shaft (52). The transmission gear (54) is meshed with the outside of the rigid shaft (52).

4. The coal desulfurization device for thermal power plants according to claim 1, characterized in that, The crushing pipe (2) is also equipped with a suction pump (7) for providing negative pressure on the outside of the crushing chamber (1).

5. The coal desulfurization device for thermal power plants according to claim 1, characterized in that, Below the feed top frame (3) is a collection frame (8) for receiving coal particles.

6. The coal desulfurization device for thermal power plants according to claim 5, characterized in that, The high-pressure expansion tank (4) is also provided with a drive motor (9), a corrosion-resistant shaft (10) and a washing rod (11) in the middle. The drive motor (9) is installed on the top of the high-pressure expansion tank (4). The corrosion-resistant shaft (10) is fixedly connected to the output end of the drive motor (9). The washing rod (11) is fixedly connected to the outer wall of the corrosion-resistant shaft (10) and is used for washing coal after alkali leaching with water.

7. The coal desulfurization device for thermal power plants according to claim 6, characterized in that, On the opposite sides of the high-pressure expansion tank (4) and the collection frame (8), there are also conveying pipes (12) and feeding pumps (13). The feeding pumps (13) are installed on the outside of the conveying pipes (12), and the two ends of the conveying pipes (12) are tightly fitted to the inner surfaces of the high-pressure expansion tank (4) and the collection frame (8), respectively.

8. The coal desulfurization device for thermal power plants according to claim 2, characterized in that, The hollow hood (62) is also provided with a flared disc (14) for adsorbing pyrite on its outer side.

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