Fuel processing device and energy saving system for thermal power plant

Abstract

The embodiment of the present disclosure provides a fuel processing device and a thermal power plant energy-saving system, the fuel processing device comprises a mounting frame, a processing box is embedded at the top of the mounting frame, a crushing assembly and a screening assembly are respectively arranged in the processing box, and a discharge port at the bottom of the processing box is communicated with a feeding mechanism; a drying mechanism is arranged on one side of the mounting frame, and the feeding mechanism is communicated with the drying mechanism. The crushing assembly, the screening assembly and the drying mechanism arranged by the fuel processing device can crush, screen and dry the coal of the thermal power plant, so that the quality of the coal of the thermal power plant is improved, the combustion of the coal is stabilized, the combustion efficiency of the coal is improved, the loss caused by incomplete combustion of the fuel is reduced, and the high combustion rate of the coal of the thermal power plant is ensured.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the field of energy-saving technology for thermal power plants, specifically relating to a fuel processing device and an energy-saving system for thermal power plants. Background Technology

[0002] Thermal power plants, as a crucial foundation for national economic development, consume significant amounts of energy and generate corresponding environmental pollution while producing electricity. With the continuous development and construction of new energy sources, traditional energy power generation continues to play a vital role, but it also faces serious challenges. Therefore, the introduction and implementation of energy-saving systems in thermal power plants are particularly important. These systems can help thermal power plants reduce energy consumption, improve energy efficiency, and decrease environmental pollution, thereby maintaining strong competitiveness.

[0003] Currently, thermal power plants mainly control coal consumption, electricity consumption, and water consumption in their energy-saving methods. However, existing methods for reducing coal consumption lack dedicated equipment for crushing, screening, and drying coal, making it difficult to effectively improve fuel quality and promote stable coal combustion. Furthermore, the low quality of coal reduces combustion efficiency and easily leads to incomplete combustion. Therefore, there is an urgent need to design a fuel processing device to solve these problems. Summary of the Invention

[0004] The embodiments disclosed herein are intended to at least address one of the technical problems existing in the prior art, and to provide a fuel processing device and an energy-saving system for thermal power plants.

[0005] A first aspect of the embodiments of this disclosure provides a fuel processing apparatus, comprising: a mounting frame, a processing box embedded in the top of the mounting frame, a crushing component and a screening component respectively disposed inside the processing box, and a discharge port at the bottom of the processing box communicating with a feeding mechanism; A drying mechanism is provided on one side of the mounting frame, and the feeding mechanism is connected to the drying mechanism.

[0006] Furthermore, it also includes: a hopper at the feed inlet at the top of the processing box; a first guide trough and a second guide trough respectively embedded in the two side walls of the processing box; a first collection trough and a second collection trough respectively symmetrically installed on the top of the mounting frame; a first collection trough and a second collection trough respectively correspondingly installed below the discharge ports of the first guide trough and the second guide trough; a guide plate fixedly installed on the inner wall of the right side of the processing box; and a discharge trough at the bottom of the processing box.

[0007] Optionally, the pulverizing component includes: The first crushing block, the second crushing block, and the fixing plate are provided. The first crushing block is fixedly installed on the top of the inner side wall of the processing box. The fixing plate is fixedly installed on the inner wall of the right side of the processing box. The second crushing block is slidably connected to the top of the fixing plate. Several crushing rods are provided on the adjacent sides of the first and second crushing blocks. The second broken block has a groove on the side opposite to the first broken block, and a sliding groove is embedded in the rear side wall of the groove; A servo motor is fixedly mounted on the top of the fixed plate, and a first pulley is fixedly mounted on the output shaft of the servo motor. A rotating shaft is fixedly mounted on the right side of the inner wall of the processing box via a mounting rod, and a second pulley and a turntable are fixedly mounted at the front and rear ends of the rotating shaft, respectively. The second pulley is connected to the first pulley via a belt, and a lever is mounted on the turntable away from the center, with one end of the lever slidably connected in the slide groove.

[0008] Optionally, the screening component includes: A first screen and a second screen, one end of which are hinged to the inner wall on the left side of the processing box; a mounting base, which is fixedly mounted to the inner wall of the processing box by several springs, and the other end of the first screen is slidably connected to the mounting base; a mounting plate, which is fixedly mounted to the top of the discharge chute, and the other end of the second screen is slidably connected to the mounting plate; the second crushed block and the first screen are hinged together by a connecting rod, and the first screen and the second screen are hinged together by a connecting rod.

[0009] Furthermore, it also includes a feeding mechanism corresponding to the processing box. The feeding mechanism includes a Roots blower and a feeding pipe. The feeding pipe is connected to the discharge port of the discharge trough. The Roots blower is fixedly connected to the mounting frame by a fixed base, and one end of the feeding pipe is connected to the Roots blower.

[0010] Optionally, the drying mechanism includes: Support frame; The box body is fixedly installed on the top of the support frame; the drying box is set inside the box body, and the two side walls of the drying box are provided with several through holes; two dust covers are fixedly installed symmetrically on the outer side walls of the drying box. The lower end of the mounting shaft is rotatably connected to the bottom of the drying box, and an annular guide groove is fixedly installed on the mounting shaft. A bevel gear is fixedly installed on the top of the mounting shaft, which rotatably passes through the top of the drying box and the box body. The housing is fixedly installed at the bottom of the box body. A drive motor is fixedly installed on the top of the housing, and a second bevel gear is fixedly installed on the output shaft of the drive motor, and the second bevel gear meshes with the first bevel gear. The air inlet at the bottom of the housing is connected to the air supply duct, and the air inlet of the air supply duct is connected to the blower. A heater is connected to the air supply duct.

[0011] Furthermore, it also includes fuel performance testing equipment, which is used by the fuel processing device to test the combustion performance of coal after processing by the coal-fired power plant. The fuel performance testing equipment includes: A mass sensor is used to detect the mass of coal used in combustion performance testing after the coal has been processed by a fuel processing device. A direct-reading dust concentration meter is used to detect the concentration of coal during combustion after it has been treated by a fuel processing device. A timer is used to detect the time required for complete combustion of coal after it has been processed by a fuel processing device. The controller and the alarm are electrically connected to the mass sensor, the direct-reading dust concentration meter, the timer and the alarm. The controller controls the alarm to work based on the control signals of the mass sensor, the direct-reading dust concentration meter and the timer.

[0012] Optionally, the controller controls the alarm based on control signals from the mass sensor, the direct-reading dust concentration meter, and the timer, including: The controller calculates the calorific value of the coal after it has been processed by the fuel treatment device based on Formula 1 and the detection values ​​obtained by the mass sensor, the direct-reading dust concentration meter, and the timer. The controller compares the calorific value of the coal after processing by the current fuel handling unit in the power plant. Compared to the preset range of calorific value for coal combustion, if the current fuel processing device processes the coal from the power plant, the calorific value of the coal combustion will be... When the calorific value of the coal is outside the preset range, the controller will activate the alarm. Formula 1: ; in, This refers to the calorific value of coal after it has been processed by a fuel processing unit and combusted in a thermal power plant. This is the mass flow ratio of the coal-fired flue gas recirculation to the pulverized coal gas flow. This refers to the mass value detected by the mass sensor when testing the combustion performance of coal after it has been processed by a fuel handling device. The area of ​​coal combustion during combustion performance testing. This is a direct-reading dust concentration meter used to measure the concentration of coal during combustion after it has been treated by a fuel processing device. The dynamic constant of coal combustion, The diffusion coefficient of coal combustion is given. denoted as , where is the activation energy of the coal, and t is the timer value indicating the complete combustion time of the coal after processing by the fuel handling device. For Nusselt number, is the air diffusion coefficient.

[0013] A second aspect of the embodiments of this disclosure provides an energy-saving system for thermal power plants, including the fuel processing device described above.

[0014] The beneficial effects of the embodiments of this disclosure include: 1. Through the installation of waste heat recovery devices, fuel processing devices, turbine flow path devices, and variable frequency speed control devices, the above work together to provide a comprehensive energy-saving system that can improve energy utilization efficiency and reduce energy consumption and waste, thereby effectively achieving energy conservation, emission reduction, and sustainable development of thermal power plants.

[0015] 2. The coal in the power plant is processed, crushed, screened, and dried by the crushing, screening, and drying components of the fuel processing device, thereby improving the quality of the coal, promoting stable combustion, increasing combustion efficiency, reducing losses from incomplete combustion, and ensuring a high combustion rate of the coal in the power plant. Attached Figure Description

[0016] Figure 1 A schematic block diagram of a thermal power plant energy-saving system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a fuel processing device for an energy-saving system in a thermal power plant, provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure connecting the turntable and the lever in an energy-saving system for a thermal power plant, provided by an embodiment of the present invention. Figure 4 This is a schematic diagram of the drying mechanism of an energy-saving system for a thermal power plant, provided as an embodiment of the present invention.

[0017] In the diagram, 1. Mounting frame; 2. Processing box; 3. Crushing assembly; 4. Screening assembly; 5. Drying mechanism; 6. Hopper; 7. Guide chute one; 8. Guide chute two; 9. First collection chute; 10. Second collection chute; 11. Guide plate; 12. Discharge chute; 13. First crushed block; 14. Second crushed block; 15. Fixing plate; 16. Crushing rod; 17. Groove; 18. Slide chute; 19. Servo motor; 20. First pulley; 21. Rotating shaft; 22. Mounting rod; 23. Second pulley; 231. Belt; 24. Turntable; 25. Lever; 26. First screen; 27. Second screen; 28. Mounting base; 29. ​​Spring; 30. Mounting plate; 31. Connecting rod one; 32. Connecting rod two; 33. Roots blower; 331. Fixed base; 34. Feeding pipe; 35. Box body; 36. Support frame; 37. Drying box; 38. Through hole; 39. Dust cover; 40. Mounting shaft; 41. Annular guide chute; 42. Bevel gear one; 43. Housing; 44. Drive motor; 45. Bevel gear two; 46. Air supply pipe; 47. Blower; 48. Heater. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed descriptions and accompanying drawings of the following embodiments are used to exemplarily illustrate the principles of this application, but should not be used to limit the scope of this application; that is, this application is not limited to the described embodiments. In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0020] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0021] like Figure 2-4 As shown, a fuel processing device includes: a mounting frame 1, a processing box 2 embedded in the top of the mounting frame 1, a crushing component 3 and a screening component 4 respectively disposed in the processing box 2, and a discharge port at the bottom of the processing box 2 connected to a feeding mechanism.

[0022] The drying mechanism 5 is located on one side of the mounting frame 1, and the feeding mechanism is connected to the drying mechanism 5.

[0023] In some embodiments, the fuel processing device further includes a hopper 6 at the feed inlet at the top of the processing tank 2, a first guide trough 7 and a second guide trough 8 respectively embedded in the side walls of the processing tank 2, a first collection trough 9 and a second collection trough 10 respectively symmetrically installed on the top of the mounting frame 1, the first collection trough 9 and the second collection trough 10 respectively correspondingly arranged below the discharge ports of the first guide trough 7 and the second guide trough 8, a guide plate 11 fixedly installed on the inner wall of the right side of the processing tank 2, and a discharge trough 12 at the bottom of the processing tank 2.

[0024] In some embodiments, the pulverizing component 3 includes: The first crushing block 13, the second crushing block 14, and the fixing plate 15 are provided. The first crushing block 13 is fixedly installed on the top of the inner side wall of the processing box 2. The fixing plate 15 is fixedly installed on the inner wall of the right side of the processing box 2. The second crushing block 14 is slidably connected to the top of the fixing plate 15. A plurality of crushing rods 16 are provided on the adjacent sides of the first crushing block 13 and the second crushing block 14.

[0025] The second broken block 14 has a groove 17 on the side opposite to the first broken block 13, and a sliding groove 18 is embedded in the rear side wall of the groove 17.

[0026] A servo motor 19 is fixedly mounted on the top of the fixed plate 15, and a first pulley 20 is fixedly mounted on the output shaft of the servo motor 19. A rotating shaft 21 is fixedly mounted on the right side of the inner wall of the processing box 2 via a mounting rod 22, and a second pulley 23 and a turntable 24 are respectively fixedly mounted at the front and rear ends of the rotating shaft 21. The second pulley 23 is connected to the first pulley 20 via a belt 231, and a lever 25 is mounted on the turntable 24 away from the center, with one end of the lever 25 slidably connected in the slide groove 18.

[0027] In some embodiments, the screening component 4 includes: A first screen 26 and a second screen 27 are hinged at one end to the inner wall of the left side of the processing box 2. A mounting base 28 is fixedly mounted to the inner wall of the processing box 2 by several springs 29, and the other end of the first screen 26 is slidably connected to the mounting base 28. A mounting plate 30 is fixedly mounted on the top of the discharge chute 12, and the other end of the second screen 27 is slidably connected to the mounting plate 30. The second crushed block 14 and the first screen 26 are hinged by a connecting rod 31, and the first screen 26 and the second screen 27 are hinged by a connecting rod 32.

[0028] In some embodiments, the fuel processing device further includes a feeding mechanism corresponding to the processing tank 2. The feeding mechanism includes a Roots blower 33 and a feeding pipe 34. The feeding pipe 34 is connected to the discharge port of the discharge trough 12. The Roots blower 33 is fixedly connected to the mounting frame 1 by a fixing seat 331, and one end of the feeding pipe 34 is connected to the Roots blower 33.

[0029] In some embodiments, the drying mechanism 5 includes: A support frame 36 and a housing 35 are provided, with the housing 35 fixedly mounted on the top of the support frame 36. A drying oven 37 is disposed inside the housing 35, and several through holes 38 are provided on both side walls of the drying oven 37. Two dust covers 39 are symmetrically fixedly mounted on the outer side walls of the drying oven 37, respectively.

[0030] The lower end of the mounting shaft 40 is rotatably connected to the bottom of the drying chamber 37, and an annular guide groove 41 is fixedly mounted on the mounting shaft 40. A bevel gear 42 is fixedly mounted on the top of the mounting shaft 40, which rotatably passes through the top of the drying chamber 37 and the chamber body 35. The housing 43 is fixedly mounted on the bottom of the chamber body 35.

[0031] A drive motor 44 is fixedly mounted on the top of the housing 35, and a second bevel gear 45 is fixedly mounted on the output shaft of the drive motor 44, the second bevel gear 45 meshing with a first bevel gear 42. The air inlet at the bottom of the housing 35 is connected to an air supply duct 46, and the air inlet of the air supply duct 46 is connected to a blower 47. A heater 48 is connected to the air supply duct 46.

[0032] In some embodiments, the fuel processing apparatus further includes fuel performance testing equipment, which is used to test the combustion performance of coal after processing by the fuel processing apparatus for coal from a thermal power plant. The fuel performance testing equipment includes: A mass sensor is used to detect the mass of coal used in combustion performance tests after the coal has been processed by a fuel processing device.

[0033] A direct-reading dust concentration meter is used to detect the concentration of coal during combustion after it has been treated by a fuel processing device.

[0034] A timer is used to detect the time required for complete combustion of coal after it has been processed by a fuel processing device.

[0035] The controller and the alarm are electrically connected to the mass sensor, the direct-reading dust concentration meter, the timer and the alarm. The controller controls the alarm to work based on the control signals of the mass sensor, the direct-reading dust concentration meter and the timer.

[0036] In some embodiments, the controller controls the alarm based on control signals from the mass sensor, the direct-reading dust concentration meter, and the timer, including: The controller calculates the calorific value of the coal after it has been processed by the fuel treatment device based on Formula 1 and the detection values ​​obtained by the mass sensor, the direct-reading dust concentration meter, and the timer. The controller compares the calorific value of the coal after processing by the current fuel handling unit in the power plant. Compared to the preset range of calorific value for coal combustion, if the current fuel processing device processes the coal from the power plant, the calorific value of the coal combustion will be... When the calorific value of the coal is outside the preset range, the controller will activate the alarm. Formula 1: .

[0037] in, This refers to the calorific value of coal after it has been processed by a fuel processing unit and combusted in a thermal power plant. This is the mass flow ratio of the coal-fired flue gas recirculation to the pulverized coal gas flow. This refers to the mass value detected by the mass sensor when testing the combustion performance of coal after it has been processed by a fuel handling device. The area of ​​coal combustion during combustion performance testing. This is a direct-reading dust concentration meter used to measure the concentration of coal during combustion after it has been treated by a fuel processing device. The dynamic constant of coal combustion, The diffusion coefficient of coal combustion is given. denoted as , where is the activation energy of the coal, and t is the timer value indicating the complete combustion time of the coal after processing by the fuel handling device. For Nusselt number, is the air diffusion coefficient.

[0038] A second aspect of the embodiments of this disclosure provides an energy-saving system for thermal power plants, including the fuel processing device described above.

[0039] Example 1 This invention provides an energy-saving system for thermal power plants, such as... Figure 1 As shown, it includes: Waste heat recovery devices, including heat pipe heat exchangers and heat pumps, are used to recover waste heat resources such as flue gas and wastewater emitted by thermal power plants. The fuel processing device, based on improvements to the burner structure, incorporates pretreatment measures such as fuel screening, crushing, and mixing according to actual needs to improve fuel quality, and employs an advanced combustion control system to achieve precise control of the combustion process. A steam turbine flow path device, based on new high-efficiency steam turbine blades and sealing technology, is used to modify the flow path of a steam turbine and improve flow path efficiency. Variable frequency speed control devices are based on the installation of frequency converters on equipment such as fans and water pumps in thermal power plants, which are used to automatically adjust the speed of motors according to actual needs.

[0040] The working principle and beneficial effects of the above technical solution are as follows: This invention discloses an energy-saving system for thermal power plants, comprising a waste heat recovery device, a fuel processing device, a turbine flow path device, and a variable frequency drive (VFD) device. These components work together to provide a comprehensive energy-saving system that improves energy utilization efficiency and reduces energy consumption and waste, thereby effectively achieving energy conservation, emission reduction, and sustainable development in thermal power plants. The waste heat recovery device, including a heat pipe heat exchanger and a heat pump, recovers waste heat resources such as flue gas and wastewater emitted by the thermal power plant, thereby reducing energy consumption. The fuel processing device, based on improvements to the burner structure, employs pretreatment measures such as fuel screening, crushing, and mixing according to actual needs to improve fuel quality and utilizes an advanced combustion control system to achieve precise control of the combustion process. The turbine flow path device, based on new high-efficiency turbine blades and sealing technology, modifies the turbine flow path to improve flow efficiency, reduce energy loss, and lower energy consumption. The VFD device, by installing frequency converters on equipment such as fans and pumps in the thermal power plant, automatically adjusts the motor speed according to actual needs, effectively avoiding the "oversized motor for undersized load" phenomenon and reducing energy consumption.

[0041] The aforementioned energy-saving system for thermal power plants, through the installation of multiple devices, can effectively address key energy consumption indicators such as coal consumption, electricity consumption, and water consumption. This can help thermal power plants effectively reduce energy consumption, improve energy efficiency, reduce environmental pollution, and maintain strong competitiveness.

[0042] Example 2 Based on Example 1, such as Figures 2-4As shown, the fuel processing device includes: a mounting frame 1, a processing box 2 embedded in the top of the mounting frame 1, a crushing component 3 and a screening component 4 respectively disposed in the processing box 2, a discharge port at the bottom of the processing box 2 connected to a feeding mechanism, and a drying mechanism 5 disposed on one side of the mounting frame 1, and the feeding mechanism connected to the drying mechanism 5.

[0043] Preferably, the feed inlet at the top of the processing box 2 is provided with a hopper 6, and the two side walls of the processing box 2 are respectively provided with a first guide groove 7 and a second guide groove 8. The first collection groove 9 and the second collection groove 10 are respectively symmetrically installed on the top of the mounting frame 1. The first collection groove 9 and the second collection groove 10 are respectively arranged one-to-one below the discharge port of the first guide groove 7 and the second guide groove 8. One side of the guide plate 11 is fixedly installed on the inner wall of the right side of the processing box 2, and the discharge groove 12 is arranged at the bottom of the processing box 2.

[0044] Preferably, the crushing assembly includes: a first crushing block 13 and a second crushing block 14. The first crushing block 13 is fixedly installed on the top of the inner wall of the processing box 2. A fixing plate 15 is fixedly installed on the inner wall of the right side of the processing box 2. The second crushing block 14 is slidably connected to the top of the fixing plate 15. A plurality of crushing rods 16 are provided on the adjacent sides of the first crushing block 13 and the second crushing block. A groove 17 is provided on one side of the second crushing block 14. A sliding groove 18 is embedded in the rear side wall of the groove 17. A servo motor 19 is fixedly installed on the top of the fixing plate 15. A first pulley 20 is fixedly installed on the output shaft of the servo motor 19. A rotating shaft 21 is fixedly installed on the right side of the inner wall of the processing box 2 through a mounting rod 22. A second pulley 23 and a turntable 24 are fixedly installed at the front and rear ends of the rotating shaft 21, respectively. The second pulley 23 is connected to the first pulley 20 through a belt 231. A lever 25 is installed on the turntable 24 away from the center. One end of the lever 25 is slidably connected in the sliding groove 18.

[0045] Preferably, the screening assembly 4 includes a first screen 26 and a second screen 27. One end of the first screen 26 and the second screen 27 are hinged to the inner wall on the left side of the processing box 2. The mounting base 28 is fixedly installed on the inner wall of the processing box 2 by a plurality of springs 29, and the other end of the first screen 26 is slidably connected to the mounting base 28. The mounting plate 30 is fixedly installed on the top of the discharge chute 12, and the other end of the second screen 27 is slidably connected to the mounting plate 30. The second crushed block 14 and the first screen 26 are hinged by a connecting rod 31, and the first screen 26 and the second screen 27 are hinged by a connecting rod 32.

[0046] Preferably, the feeding mechanism includes a Roots blower 33 and a feeding pipe 34. The feeding pipe 34 is connected to the discharge port of the discharge trough 12. The Roots blower 33 is fixedly connected to the mounting frame 1 via a fixing seat 331, and one end of the feeding pipe 34 is connected to the Roots blower 33.

[0047] Preferably, the drying mechanism 5 includes: a housing 35, which is fixedly installed on the top of the support frame 36; a drying chamber 37 is disposed inside the housing 35; several through holes 38 are provided on both side walls of the drying chamber 37; two dust covers 39 are symmetrically fixedly installed on the outer side walls of the drying chamber 37; the lower end of a mounting shaft 40 is rotatably connected to the bottom of the drying chamber 37; and an annular guide groove 41 is fixedly installed on the mounting shaft 40; the top of the mounting shaft 40 rotatably passes through the... A bevel gear 42 is fixedly installed on the top of the drying oven 37 and the box body 35. The shell 43 is fixedly installed on the bottom of the box body 35. The drive motor 44 is fixedly installed on the top of the box body 35, and a bevel gear 45 is fixedly installed on the output shaft of the drive motor 44. The bevel gear 45 meshes with the bevel gear 42. The air inlet at the bottom of the box body 35 is connected to the air supply duct 46, and the air inlet of the air supply duct 46 is connected to the blower 47. The heater 48 is connected to the air supply duct 46.

[0048] The working principle and beneficial effects of the above technical solution are as follows: In the aforementioned energy-saving system for a thermal power plant, a fuel processing device is installed. When coal needs to be processed, a pulverizing component within this device operates. A servo motor 19, fixedly mounted on the top of the fixed plate 15, drives a first pulley 21 fixed to the output shaft of the servo motor 19. A second pulley 23 and a turntable 24 are fixedly mounted at the front and rear ends of a rotating shaft 21 fixed to a fixed rod, causing the turntable 24 to rotate synchronously. A lever 25 is installed on the turntable 24 away from its center. One end of the lever 25 is slidably connected to a groove 18, allowing the lever 25 and the groove 18 to move a second crushing block 14 left and right along the mounting plate 30. The second crushing block 14 moves relative to the first crushing block 13. Combined with several pulverizing rods 16 positioned on adjacent sides of the second and first crushing blocks 14, this pulverizes the coal conveyed by the hopper 6 at the top of the processing box 2. This pulverizing component efficiently and stably pulverizes the coal, ensuring the coal quality meets usage requirements.

[0049] After the coal is crushed by the crushing component via the screening component 4, it passes through the first screen 26 and the second screen 27 in sequence. The screened coal is then collected by the discharge chute 12 and discharged through its outlet. During screening by the first screen 26 and the second screen 27, the movement of the second crushing block 14 drives the first screen 26 to vibrate up and down via the connecting rod 31. The mounting base 28 is fixed to the inner wall of the processing box 2 by several springs 29, allowing one end of the first screen 26 to vibrate rapidly up and down along the mounting base 28. To improve the screening effect, the coal slag screened by the first screen 26 is discharged through the feed chute 7 and falls into the first collection trough 9. At the same time, the first screen 26 and the second screen 27 are hinged by the connecting rod 32. As the first screen 26 vibrates up and down, the second screen 27 vibrates up and down synchronously along the mounting plate 30, so that the fuel is screened by the second screen 27 and falls into the discharge trough 12. The screened coal slag is discharged through the feed chute 8 and falls into the second collection trough 10. The screening component 4 achieves efficient screening of coal, thereby effectively improving the fineness of the coal and making the coal combustion more efficient.

[0050] Through the drying mechanism, the coal discharged from the outlet of the discharge trough 12 passes through the Roots blower 33 and the feeding pipe 34, causing the screened coal to enter the drying box 37. At this time, the blower 47 continuously delivers hot air heated by the heater 48 into the box 35, while the coal falls into the annular guide trough 41 through the feed inlet at the top of the box 35. The drive motor 44 drives the fixedly connected bevel gear 45 to rotate. The bevel gear 42 meshes with the bevel gear 45, causing the mounting shaft 4 to rotate. The 0 drives the fixedly connected annular guide trough 41 to rotate, thereby ensuring that the coal flows continuously downward on the annular guide trough 41. At this time, hot air enters the interior of the drying chamber 37 through the through holes 38 on the side wall of the dust removal hood and the drying chamber 37, realizing all-round drying of the coal, greatly improving the drying efficiency of the coal, improving the quality of the coal, and ensuring the combustion efficiency of the coal. Secondly, the dust cover 39 can effectively prevent coal dust from entering the interior of the chamber 35, causing coal dust accumulation in the air supply duct 46 and the heater 48.

[0051] The aforementioned energy-saving system for thermal power plants uses a crushing component, a screening component 4, and a drying mechanism in the fuel processing device to process, crush, screen, and dry the coal used in the thermal power plant, thereby improving the quality of the coal, promoting stable combustion, increasing combustion efficiency, reducing losses from incomplete combustion, and ensuring a high combustion rate of the coal in the thermal power plant.

[0052] Example 3 The energy-saving system for a thermal power plant described in Example 1 or 2 further includes a fuel performance testing device for testing the combustion performance of coal after it has been processed by the fuel treatment device. The fuel performance testing device includes: A mass sensor is used to detect the mass of coal used in combustion performance testing after the coal has been processed by a fuel processing device. A direct-reading dust concentration meter is used to detect the concentration of coal during combustion after it has been treated by a fuel processing device. A timer is used to detect the time required for complete combustion of coal after it has been processed by a fuel processing device. The controller and alarm are electrically connected to a mass sensor, a direct-reading dust concentration meter, a timer, and the alarm. The controller controls the alarm to operate based on the mass sensor, the direct-reading dust concentration meter, and the timer.

[0053] Preferably, the controller controls the alarm based on the mass sensor, the direct-reading dust concentration meter, and the timer, including: Based on Formula 1 and the detection values ​​obtained from the mass sensor, direct-reading dust concentration meter, and timer, the calorific value of the coal after processing by the fuel treatment device for coal combustion in the thermal power plant is calculated. The controller compares the calorific value of the coal after processing by the current fuel handling unit in the power plant. Compared to the preset range of calorific value for coal combustion, if the current fuel processing device processes the coal from the power plant, the calorific value of the coal combustion will be... When the calorific value of the coal is outside the preset range, the controller will activate the alarm. Formula 1: ; in, This refers to the calorific value of coal after it has been processed by a fuel processing unit and combusted in a thermal power plant. This is the mass flow rate ratio of the coal-fired flue gas return to the pulverized coal gas flow (obtained by referring to a table). This refers to the mass value detected by the mass sensor when testing the combustion performance of coal after it has been processed by a fuel handling device. The area of ​​coal combustion during combustion performance testing. This is a direct-reading dust concentration meter used to measure the concentration of coal during combustion after it has been treated by a fuel processing device. This is the kinetic constant for coal combustion (obtained by looking up a table). The diffusion coefficient of coal combustion is given. t represents the activation energy of the coal (obtained from a table based on the actual type of coal), and t is the timer value for the complete combustion of the coal after it has been processed by the fuel treatment device. It is the Nusselt number (usually taken as 2). is the air diffusion coefficient.

[0054] The beneficial effects of the above technical solution are as follows: First, based on the formula and the detection values ​​of the mass sensor, direct-reading dust concentration meter and timer, the calorific value of the coal after the fuel treatment device processes the coal in the thermal power plant is calculated. By comprehensively considering the mass flow ratio of the coal return flue gas and the pulverized coal airflow, the mass of the coal used for combustion performance testing after the coal is processed by the fuel treatment device, the combustion area of ​​the coal during combustion performance testing, the concentration of the coal during combustion after the coal is processed by the fuel treatment device, the kinetic constant of the coal, the diffusion coefficient of the coal, the activation energy of the coal, the time for complete combustion of the coal used for combustion after the coal is processed by the fuel treatment device, and the diffusion coefficient of the air, the calculation results are more accurate and reliable.

[0055] The controller controls the operation of the mass sensor, direct-reading dust concentration meter, timer, and alarm, and measures the calorific value of the coal after processing by the actual fuel processing unit. When the calorific value of the coal combustion is outside the preset range, the controller activates the alarm, prompting staff to promptly inspect the fuel processing unit. Based on the inspection results, maintenance is performed to ensure the unit meets operational requirements, guaranteeing the overall normal operation of the power plant's energy-saving system, reducing energy consumption, and effectively extending the lifespan of the fuel processing unit. This further meets the unit's requirements for operational reliability and stability. By monitoring the unit's operating status in real time, the efficiency of coal processing is increased, and faults are quickly detected and repaired promptly.

[0056] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A fuel processing device, characterized in that, include: The mounting frame has a processing box embedded in its top. The processing box contains a crushing component and a screening component. The discharge port at the bottom of the processing box is connected to a feeding mechanism. A drying mechanism is provided on one side of the mounting frame, and the feeding mechanism is connected to the drying mechanism.

2. The fuel processing apparatus according to claim 1, characterized in that, Also includes: The feed hopper is located at the top of the processing box, the first and second guide troughs are respectively embedded in the two side walls of the processing box, the first and second collection troughs are respectively symmetrically installed on the top of the mounting frame, the first and second collection troughs are respectively arranged below the discharge ports of the first and second guide troughs, the guide plate is fixedly installed on the inner wall of the right side of the processing box, and the discharge trough is located at the bottom of the processing box.

3. The fuel processing apparatus according to claim 1, characterized in that, The crushing component includes: The first crushing block, the second crushing block, and the fixing plate are provided. The first crushing block is fixedly installed on the top of the inner side wall of the processing box. The fixing plate is fixedly installed on the inner wall of the right side of the processing box. The second crushing block is slidably connected to the top of the fixing plate. Several crushing rods are provided on the adjacent sides of the first and second crushing blocks. The second broken block has a groove on the side opposite to the first broken block, and a sliding groove is embedded in the rear side wall of the groove; A servo motor is fixedly mounted on the top of the fixed plate, and a first pulley is fixedly mounted on the output shaft of the servo motor. A rotating shaft is fixedly mounted on the right side of the inner wall of the processing box via a mounting rod, and a second pulley and a turntable are fixedly mounted at the front and rear ends of the rotating shaft, respectively. The second pulley is connected to the first pulley via a belt, and a lever is mounted on the turntable away from the center, with one end of the lever slidably connected in the slide groove.

4. The fuel processing apparatus according to claim 3, characterized in that, The screening component includes: A first screen and a second screen, one end of which are hinged to the inner wall on the left side of the processing box; a mounting base, which is fixedly mounted to the inner wall of the processing box by several springs, and the other end of the first screen is slidably connected to the mounting base; a mounting plate, which is fixedly mounted to the top of the discharge chute, and the other end of the second screen is slidably connected to the mounting plate; the second crushed block and the first screen are hinged together by a connecting rod, and the first screen and the second screen are hinged together by a connecting rod.

5. The fuel processing apparatus according to claim 2, characterized in that, It also includes a feeding mechanism corresponding to the processing box. The feeding mechanism includes a Roots blower and a feeding pipe. The feeding pipe is connected to the discharge port of the discharge trough. The Roots blower is fixedly connected to the mounting frame by a fixed base, and one end of the feeding pipe is connected to the Roots blower.

6. The fuel processing apparatus according to claim 1, characterized in that, The drying mechanism includes: Support frame; The box body is fixedly installed on the top of the support frame; the drying box is set inside the box body, and the two side walls of the drying box are provided with several through holes; two dust covers are fixedly installed symmetrically on the outer side walls of the drying box. The lower end of the mounting shaft is rotatably connected to the bottom of the drying box, and an annular guide groove is fixedly installed on the mounting shaft. A bevel gear is fixedly installed on the top of the mounting shaft, which rotatably passes through the top of the drying box and the box body. The housing is fixedly installed at the bottom of the box body. A drive motor is fixedly installed on the top of the housing, and a second bevel gear is fixedly installed on the output shaft of the drive motor, and the second bevel gear meshes with the first bevel gear. The air inlet at the bottom of the housing is connected to the air supply duct, and the air inlet of the air supply duct is connected to the blower. A heater is connected to the air supply duct.

7. The fuel processing apparatus according to claim 1, characterized in that, It also includes fuel performance testing equipment, which is used by the fuel processing device to test the combustion performance of coal after processing by the coal-fired power plant. The fuel performance testing equipment includes: A mass sensor is used to detect the mass of coal used in combustion performance testing after the coal has been processed by a fuel processing device. A direct-reading dust concentration meter is used to detect the concentration of coal during combustion after it has been treated by a fuel processing device. A timer is used to detect the time required for complete combustion of coal after it has been processed by a fuel processing device. The controller and the alarm are electrically connected to the mass sensor, the direct-reading dust concentration meter, the timer and the alarm. The controller controls the alarm to work based on the control signals of the mass sensor, the direct-reading dust concentration meter and the timer.

8. The fuel processing apparatus according to claim 7, characterized in that, The controller controls the alarm based on control signals from the mass sensor, the direct-reading dust concentration meter, and the timer, including: The controller calculates the calorific value of the coal after it has been processed by the fuel treatment device based on Formula 1 and the detection values ​​obtained by the mass sensor, the direct-reading dust concentration meter, and the timer. The controller compares the calorific value of the coal after processing by the current fuel handling unit in the power plant. Compared to the preset range of calorific value for coal combustion, if the current fuel processing device processes the coal from the power plant, the calorific value of the coal combustion will be... When the calorific value of the coal is outside the preset range, the controller will activate the alarm. Formula 1: ； in, This refers to the calorific value of coal after it has been processed by a fuel processing unit and combusted in a thermal power plant. This is the mass flow ratio of the coal-fired flue gas recirculation to the pulverized coal gas flow. This refers to the mass value detected by the mass sensor when testing the combustion performance of coal after it has been processed by a fuel handling device. The area of ​​coal combustion during combustion performance testing. This is a direct-reading dust concentration meter used to measure the concentration of coal during combustion after it has been treated by a fuel processing device. The dynamic constant of coal combustion, The diffusion coefficient of coal combustion is given. denoted as , where is the activation energy of the coal, and t is the timer value indicating the complete combustion time of the coal after processing by the fuel handling device. For Nusselt number, is the air diffusion coefficient.

9. An energy-saving system for a thermal power plant, characterized in that, Includes the fuel processing apparatus according to any one of claims 1-8.

Images