Fly ash recovery pretreatment equipment

Abstract

The coal ash recovery pretreatment equipment comprises a machine body internally provided with a mounting frame, and the mounting frame is arranged to be of a right triangle structure; three groups of rotating shafts are rotationally arranged in the machine body, the three groups of rotating shafts are arranged in a right triangle shape and slidably penetrate through the corresponding end parts of the mounting frame, gears are fixed at the two ends of the three rotating shafts, and the motor is fixedly mounted on the outer wall of the machine body; the mounting frame is located in an inner cavity of the conveying belt and makes sliding contact with the inner wall of the conveying belt. And a first magnet, a second magnet and a third magnet are respectively arranged in the grooves of the mounting frame. Fly ash moves on the inclined face of the conveying belt of the right triangle structure, iron mineral particles are adsorbed to the conveying belt through cooperation of the first magnet, the second magnet and the third magnet, the magnetic action time of the fly ash is prolonged, and the rolling time of the fly ash is also prolonged through the arrangement of the inclined face. And iron mineral particles in the fly ash can be thoroughly removed.

Description

Technical Field

[0001] The invention relates to the technical field of fly ash recovery, and in particular to fly ash recovery pretreatment equipment. Background Art

[0002] Fly ash, also known as fly ash, refers to the fine ash collected from the flue gas after coal combustion. It is the main solid waste discharged by coal-fired power plants. If a large amount of fly ash is not treated, it will produce dust and pollute the atmosphere. If it is discharged into the water system, it will cause river siltation, and the toxic chemicals in it will also cause harm to humans and organisms. However, fly ash can be used as a resource, such as as an admixture for concrete.

[0003] The existing fly ash collected from coal-fired power plants or industrial sources contains metal particles (including iron minerals and aluminum minerals). In order to remove the metal particles in the fly ash, pretreatment operations are required. Usually, a drum magnetic separator is used to remove the iron particles in the fly ash, and then electrostatic separation is used to remove the aluminum particles in the fly ash. The above-mentioned permanent magnetic drum magnetic separator has the following problems during operation when removing iron particles from fly ash: since the magnetic drum is round, when the fly ash falls onto the curved surface of the rotating drum, it will move downward along its curved surface. During this process, since the fly ash moves in contact with the curved surface of the drum for a short time, the magnetic action time is short, which can easily cause incomplete removal of iron mineral particles mixed in the fly ash and poor impurity removal effect. Therefore, the present application provides a fly ash recovery and pretreatment equipment to meet the needs. Summary of the invention

[0004] The purpose of the present application is to provide a fly ash recovery pretreatment device for solving the technical problem that the iron mineral particles mixed in the fly ash are not completely removed due to the short magnetic action time during the existing fly ash removal.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A fly ash recovery pretreatment device, comprising a body with a mounting frame arranged inside, wherein the upper end, the bottom end and the right end of the body are respectively provided with a feed port, a discharge port and a discharge port, and the mounting frame is arranged in a right-angled triangle structure; Three groups of rotating shafts are rotatably arranged in the body, and the three groups of rotating shafts are arranged in a right triangle and slide through the corresponding ends of the mounting frame, and gears are fixed at both ends of the three rotating shafts, and one end of one group of rotating shafts passes through the body and is connected to the output shaft of the motor, and the motor is fixedly mounted on the outer wall of the body; The mounting frame is located in the inner cavity of the conveyor belt and is in sliding contact with the inner wall of the conveyor belt. The conveyor belt is made of elastic non-magnetic isolation material. The conveyor belt is meshed and connected with the gear through meshing teeth arranged on the inner wall. A scraper is disposed and inclined below the conveyor belt, and a first material guide plate is disposed and inclined below the scraper; A first magnet, a second magnet and a third magnet are respectively arranged in the grooves of the mounting frame; A second material guide plate is obliquely arranged at the bottom of the machine body near the material discharge port.

[0006] As a preferred implementation manner in this embodiment, an automatic magnetic adjustment unit is further provided, which can automatically adjust the magnetic field strengths of the first magnet, the second magnet and the third magnet according to the iron content in the fly ash.

[0007] As a preferred implementation in this embodiment, the automatic magnetic adjustment unit includes a hollow cylinder with a jacking spring installed inside, a movable column fixedly arranged at the lower end of the first material guide plate, and a current regulator arranged at the bottom of the body cavity; The first magnet, the second magnet and the third magnet are all electromagnets and are electrically connected to the current regulator, and an adjustment knob is installed on the upper end of the current regulator; The first material guide plate is movably arranged in the machine body, and the lower end of the movable column is slidably arranged in the inner cavity of the hollow cylinder and contacts with the upper end of the lifting spring; An L-shaped rod is installed at the lower end of the first material guide plate, and the lower end of the L-shaped rod is slidably arranged in an arc-shaped groove arranged on the outer wall of the adjusting knob.

[0008] As a preferred implementation in this embodiment, an initial magnetic intensity adjustment unit is further provided, which can adjust the initial magnetic field intensity of the first magnet, the second magnet and the third magnet as needed.

[0009] As a preferred implementation in this embodiment, the initial magnetic intensity adjustment unit includes a vertical rod fixedly arranged at the lower end of the first material guide plate and a mounting plate fixedly arranged at the upper end of the current regulator; The lower end of the L-shaped rod slides through the mounting plate, and the upper end of the L-shaped rod slides in the square cavity of the vertical rod; A square column is slidably arranged in the square cavity of the vertical rod, and a screw rod is threadedly connected in the threaded cavity of the square column, and the upper end of the screw rod extends into a through hole provided on the vertical rod, and the screw rod is rotatably connected to the vertical rod; The upper end of the L-shaped rod is fixedly connected to the lower end of the square column.

[0010] As a preferred implementation in this embodiment, the angle between the inclined surface on the conveyor belt and the horizontal plane is controlled to be 30° to 45°.

[0011] As a preferred implementation manner in this embodiment, a storage box is fixed to the upper end of the body, and a rectangular discharge port is provided at the lower end of the storage box. The storage box is connected to the body through a spring, and an exciter is provided on the outer wall of the storage box.

[0012] In summary, the technical effects and advantages of the present invention are as follows: The invention has a reasonable structure. The fly ash moves on the inclined plane of the conveyor belt with a right-angled triangle structure, and the iron mineral particles are adsorbed on the conveyor belt by the cooperation of the first magnet, the second magnet and the third magnet, thereby prolonging the magnetic action time of the fly ash. When the fly ash rolls down on the inclined plane, the agglomerated fly ash will be rolled away. The setting of the inclined plane also prolongs the rolling away time of the fly ash, so that the wrapped iron mineral particles can be completely exposed, which is conducive to completely removing the iron mineral particles in the fly ash. In the present invention, an automatic magnetic adjustment unit is also provided, which can automatically adjust the magnetic field strength of the first magnet, the second magnet and the third magnet according to the iron content in the fly ash, so as to ensure that the iron mineral particles are fully adsorbed and the purpose of energy saving is achieved; In the present invention, an initial magnetic intensity adjustment unit is also provided, and the initial magnetic field intensity can be set according to needs, so as to achieve energy saving and effectively adsorb iron mineral particles in fly ash. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in the middle front view; Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure of the middle mounting frame; Figure 4 for Figure 2 A schematic diagram of the partial cross-section structure of the middle mounting frame; Figure 5 for Figure 2 The enlarged structural diagram at A in the middle; Figure 6 for Figure 5 The enlarged structural diagram at B in the middle; Figure 7 This is a schematic diagram of the storage box installation structure.

[0015] In the figure: 1. machine body; 2. discharge port; 3. feed port; 4. discharge port; 5. rotating shaft; 6. gear; 7. conveyor belt; 8. mounting frame; 9. scraper; 10. first guide plate; 11. second guide plate; 12. first magnet; 13. second magnet; 14. third magnet; 15. movable column; 16. lifting spring; 17. hollow cylinder; 18. vertical rod; 19. L-shaped rod; 20. current regulator; 21. arc groove; 22. mounting plate; 23. spring; 24. square column; 25. screw; 26. storage box; 27. vibrator. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example: Reference Figure 1-4 A fly ash recovery and pretreatment device shown includes a body 1 with a mounting frame 8 disposed therein, a feed port 3, a discharge port 4 and a discharge port 2 are disposed at the upper end, the bottom end and the right end of the body 1, respectively, and the mounting frame 8 is configured as a right-angled triangle structure; Three groups of rotating shafts 5 are rotatably arranged in the body 1, and the three groups of rotating shafts 5 are arranged in a right triangle and slide through the corresponding ends of the mounting frame 8. Gears 6 are fixed at both ends of the three rotating shafts 5. One end of one group of rotating shafts 5 passes through the body 1 and is connected to the output shaft of the motor. The motor is fixedly mounted on the outer wall of the body 1. The mounting frame 8 is located in the inner cavity of the conveyor belt 7 and is in sliding contact with the inner wall of the conveyor belt 7. The conveyor belt 7 is made of elastic non-magnetic isolation material. The conveyor belt 7 is meshed and connected with the gear 6 through meshing teeth arranged on the inner wall. A scraper 9 is disposed and inclined below the conveyor belt 7, and a first material guide plate 10 is disposed and inclined below the scraper 9; A first magnet 12, a second magnet 13 and a third magnet 14 are respectively arranged in the grooves of the mounting frame 8; A second material guide plate 11 is obliquely disposed at the bottom of the machine body 1 near the material outlet 2 .

[0018] When in use, the fly ash passes through the feed port 3 and falls onto the inclined surface of the moving conveyor belt 7 (the motor drives the rotating shaft 5 to rotate, and the gear 6 drives the conveyor belt 7 to run). The fly ash rolls down along the inclined surface. In this process, the iron mineral particles in the fly ash are adsorbed by the magnetic force of the first magnet 12, the second magnet 13 and the third magnet 14 (the magnetic force can pass through the conveyor belt 7 and adsorb and fix the iron mineral particles on the conveyor belt 7). Compared with the curved surface of the drum, the setting of the inclined surface on the conveyor belt 7 prolongs the magnetic action time of the fly ash, and when the fly ash rolls and falls on the inclined surface, the agglomerated fly ash will be rolled away (the setting of the inclined surface also prolongs the rolling time of the fly ash), so that the wrapped iron mineral particles can be completely exposed, which is conducive to completely removing the iron mineral particles in the fly ash. The fly ash after impurities are removed will be directly discharged outward through the discharge port 2; When the conveyor belt with the iron mineral particles adsorbed thereon moves to the top of the first guide plate 10, the iron mineral particles are moved out of the bottom of the third magnet 14 by the movement of the conveyor belt 7. The iron mineral particles in this part are no longer affected by the magnetic force and fall onto the first guide plate 10 by their own gravity and slide downward along the inclined surface thereof, and are finally discharged outward through the discharge port 4. Part of the iron mineral particles that cannot fall onto the first guide plate 10 by their own gravity can be scraped off by the scraper 9 , and the scraped iron mineral particles will fall onto the first guide plate 10 .

[0019] It should be noted that: 1. When the iron mineral particles on the inclined surface of the conveyor belt 7 just move to the bottom of the mounting frame 8, the fly ash on this part of the iron mineral particles can be shaken off to the second guide plate 11 and discharged outward through the action of gravity and the micro-vibration generated when the motor is working; 2. The running speed of the conveyor belt 7 is lower than the rolling speed of the fly ash along the inclined surface, which prolongs the magnetic action time and is conducive to the removal of iron minerals.

[0020] As a preferred implementation in this embodiment, an automatic magnetic adjustment unit is also provided, which can automatically adjust the magnetic field strength of the first magnet 12, the second magnet 13 and the third magnet 14 according to the iron content in the fly ash.

[0021] If the content of iron mineral particles in fly ash increases significantly, the magnetic field needs to be strengthened to ensure sufficient adsorption and complete removal of iron mineral particles in fly ash; if the iron content decreases, the magnetic field can be appropriately weakened to save energy. The above operation can be completed through an automatic magnetic adjustment unit.

[0022] As a preferred implementation in this embodiment, Figure 5 As shown, the automatic magnetic adjustment unit includes a hollow cylinder 17 with a jacking spring 16 installed inside, a movable column 15 fixedly arranged at the lower end of the first material guide plate 10, and a current regulator 20 arranged at the bottom of the inner cavity of the body 1; The first magnet 12, the second magnet 13 and the third magnet 14 are all electromagnets and are electrically connected to the current regulator 20. An adjusting knob is installed at the upper end of the current regulator 20. The first guide plate 10 is movably disposed in the machine body 1, and the lower end of the movable column 15 is slidably disposed in the inner cavity of the hollow cylinder 17 and contacts the upper end of the lifting spring 16; An L-shaped rod 19 is installed at the lower end of the first material guide plate 10, and the lower end of the L-shaped rod 19 is slidably disposed in an arc-shaped groove 21 provided on the outer wall of the adjusting knob.

[0023] When the amount of iron mineral particles falling onto the first guide plate 10 per unit time increases, the weight of the iron mineral particles will cause the first guide plate 10 to move downward, and at this time, the L-shaped rod 19 will squeeze and cause the adjustment knob to rotate, thereby increasing the current input to the first magnet 12, the second magnet 13, and the third magnet 14, thereby increasing the magnetism of the magnets to ensure sufficient adsorption and achieve complete removal of iron mineral particles in fly ash; When the amount of iron mineral particles falling onto the first guide plate 10 per unit time decreases, the weight of the iron mineral particles acting on the first guide plate 10 decreases, and the first guide plate 10 is lifted up by the lifting spring 16 (linear spring), so that the L-shaped rod 19 moves upward. The upward movement of the L-shaped rod 19 will cause the adjustment knob to rotate in the opposite direction, thereby reducing the current input to the electromagnet, thereby weakening the magnetism of the electromagnet, thereby achieving the purpose of energy saving.

[0024] It should be noted that after the device is turned on, that is, before fly ash is added to the body 1, its first magnet 12, the second magnet 13 and the third magnet 14 (which are three parts of a whole) have an initial magnetic field of a certain strength, which can initially adsorb and fix the subsequent fly ash, and then change the magnetic field strength according to the subsequent change in the weight of iron ore falling onto the first guide plate 10 per unit time.

[0025] As a preferred implementation in this embodiment, an initial magnetic intensity adjustment unit is further provided, which can adjust the initial magnetic field intensity of the first magnet 12, the second magnet 13 and the third magnet 14 as needed.

[0026] The initial magnetic field strength can be set as needed to achieve energy saving while effectively adsorbing iron mineral particles in fly ash.

[0027] As a preferred implementation in this embodiment, Figure 6 As shown, the initial magnetic intensity adjustment unit includes a vertical rod 18 fixedly arranged at the lower end of the first material guide plate 10 and a mounting plate 22 fixedly arranged at the upper end of the current regulator 20; The lower end of the L-shaped rod 19 slides through the mounting plate 22, and the upper end of the L-shaped rod 19 slides in the square cavity of the vertical rod 18; A square column 24 is slidably disposed in the square cavity of the vertical rod 18, and a screw rod 25 is threadedly connected in the threaded cavity of the square column 24, and the upper end of the screw rod 25 extends into a through hole provided on the vertical rod 18, and the screw rod 25 is rotatably connected to the vertical rod 18; The upper end of the L-shaped rod 19 is fixedly connected to the lower end of the square column 24 .

[0028] During adjustment, the screw 25 can be rotated so that the square column 24 drives the L-shaped rod 19 to move downward. At this time, the adjustment rotation will rotate, thereby adjusting the initial magnetic field strength of the electromagnet. After the adjustment is completed, the powder removal operation is performed.

[0029] As a preferred implementation in this embodiment, the angle between the inclined surface and the horizontal plane of the conveyor belt 7 is controlled to be 30° to 45°.

[0030] Controlling the angle within this range can ensure material flow and extend the adsorption time. If it exceeds 45°, the fly ash flow rate is too fast, the magnetic field action time is insufficient, and the iron removal rate drops significantly. If it is lower than 30°, the fly ash gravity component is insufficient, the material flows slowly along the slope, and is prone to accumulation, affecting the adsorption and fixation of iron mineral particles.

[0031] As a preferred implementation in this embodiment, Figure 7 As shown, a material storage box 26 is fixed to the upper end of the machine body 1, and a rectangular material discharge port is provided at the lower end of the material storage box 26. The material storage box 26 is connected to the machine body 1 through a spring 23, and a vibration exciter 27 is provided on the outer wall of the material storage box 26.

[0032] The fly ash in the storage box 26 is shaken and discharged by the vibrator 27 .

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fly ash recovery pretreatment device, characterized in that: It comprises a machine body (1) with a mounting frame (8) arranged inside, the upper end, the bottom end and the right end of the machine body (1) are respectively provided with a feed port (3), a discharge port (4) and a discharge port (2), and the mounting frame (8) is arranged in a right-angled triangle structure; Three groups of rotating shafts (5) are rotatably arranged in the machine body (1), and the three groups of rotating shafts (5) are arranged in a right triangle and slide through the corresponding ends of the mounting frame (8), and gears (6) are fixed at both ends of the three rotating shafts (5), one end of one group of rotating shafts (5) passes through the machine body (1) and is connected to the output shaft of the motor, and the motor is fixedly mounted on the outer wall of the machine body (1); The mounting frame (8) is located in the inner cavity of the conveyor belt (7) and is in sliding contact with the inner wall of the conveyor belt (7); the conveyor belt (7) is made of elastic non-magnetic isolation material; the conveyor belt (7) is meshed and connected with the gear (6) via meshing teeth provided on the inner wall; A scraper (9) is disposed and inclined below the conveyor belt (7), and a first material guide plate (10) is disposed and inclined below the scraper (9); A first magnet (12), a second magnet (13) and a third magnet (14) are respectively arranged in the grooves of the mounting frame (8); A second material guide plate (11) is obliquely arranged at the bottom of the machine body (1) near the material outlet (2).

2. A fly ash recovery pretreatment equipment according to claim 1, characterized in that: An automatic magnetic adjustment unit is also provided, which can automatically adjust the magnetic field strength of the first magnet (12), the second magnet (13) and the third magnet (14) according to the iron content in the fly ash.

3. A fly ash recovery and pretreatment equipment according to claim 2, characterized in that: The automatic magnetic adjustment unit comprises a hollow cylinder (17) with a lifting spring (16) installed inside, a movable column (15) fixedly arranged at the lower end of the first material guide plate (10), and a current regulator (20) arranged at the bottom of the inner cavity of the machine body (1); The first magnet (12), the second magnet (13) and the third magnet (14) are all electromagnets and are electrically connected to the current regulator (20); an adjusting knob is installed at the upper end of the current regulator (20); The first material guide plate (10) is movably arranged in the machine body (1), and the lower end of the movable column (15) is slidably arranged in the inner cavity of the hollow cylinder (17) and contacts the upper end of the lifting spring (16); An L-shaped rod (19) is mounted on the lower end of the first material guide plate (10), and the lower end of the L-shaped rod (19) is slidably disposed in an arc-shaped groove (21) provided on the outer wall of the adjusting knob.

4. A fly ash recovery and pretreatment equipment according to claim 3, characterized in that: An initial magnetic intensity adjustment unit is also provided, which can adjust the initial magnetic field intensity of the first magnet (12), the second magnet (13) and the third magnet (14) as required.

5. A fly ash recovery and pretreatment equipment according to claim 4, characterized in that: The initial magnetic intensity adjustment unit comprises a vertical rod (18) fixedly arranged at the lower end of the first material guide plate (10) and a mounting plate (22) fixedly arranged at the upper end of the current regulator (20); The lower end of the L-shaped rod (19) slides through the mounting plate (22), and the upper end of the L-shaped rod (19) is slidably disposed in the square cavity of the vertical rod (18); A square column (24) is slidably disposed in the square cavity of the vertical rod (18), and a screw rod (25) is threadedly connected in the threaded cavity of the square column (24), and the upper end of the screw rod (25) extends into a through hole provided on the vertical rod (18), and the screw rod (25) is rotatably connected to the vertical rod (18); The upper end of the L-shaped rod (19) is fixedly connected to the lower end of the square column (24).

6. A fly ash recovery and pretreatment equipment according to claim 2, characterized in that: The angle between the upper inclined surface of the conveyor belt (7) and the horizontal plane is controlled to be between 30° and 45°.

7. The fly ash recovery and pretreatment equipment according to claim 1, characterized in that: A material storage box (26) is fixed to the upper end of the machine body (1), and a rectangular material discharge opening is provided at the lower end of the material storage box (26); the material storage box (26) is connected to the machine body (1) via a spring (23), and a vibration exciter (27) is provided on the outer wall of the material storage box (26).

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