Energy-saving rotary furnace for hazardous waste treatment

Abstract

The application discloses a kind of energy-saving rotary furnace for hazardous waste treatment in the technical field of rotary furnace, including base, rotary furnace is equipped on base, installation mechanism is equipped between rotary furnace and base, installation mechanism is used to install rotary furnace on base;Crushing mechanism is equipped in crushing box, and crushing mechanism is used to crush hazardous waste into fragments;Preheating mechanism is equipped in connecting box, and preheating mechanism is used to preheat crushed hazardous waste by flue gas in rotary furnace when rotary furnace calcines hazardous waste;Driving mechanism is equipped on base, and driving mechanism is used to drive rotary furnace, crushing mechanism and preheating mechanism to operate;The device can preheat crushed hazardous waste using high-temperature flue gas generated when rotary furnace calcines, and can effectively reduce the heat loss of rotary furnace.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln technology, specifically to an energy-saving rotary kiln for hazardous waste treatment. Background Technology

[0002] In rotary kilns, to ensure thorough calcination of hazardous waste, larger pieces are typically crushed into smaller pieces before being fed into the kiln. During calcination, the kiln rotates slowly at an angle, moving the hazardous waste towards the discharge end. After calcination, the discharge end is opened to remove slag, and then the loading end is opened to add the hazardous waste. Opening the kiln directly releases heat into the air. Furthermore, the significant temperature difference between the hazardous waste and the kiln's interior causes a drop in temperature when the waste is initially at room temperature. This necessitates a longer heating time to reach the calcination temperature, requiring the kiln to generate more heat, thus reducing energy efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide an energy-saving rotary kiln for hazardous waste treatment to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving rotary kiln for hazardous waste treatment, comprising a base, on which a rotary kiln is mounted, and an installation mechanism between the rotary kiln and the base for mounting the rotary kiln on the base; two support plates are fixedly connected to the rear side of the base, and a crushing box is located between the two support plates; a connecting box is fixedly connected to the bottom of the crushing box, and the connecting box is rotatably connected to the support plates on the left and right sides; a crushing mechanism is provided inside the crushing box for crushing hazardous waste into small pieces; a preheating mechanism is provided inside the connecting box for preheating the crushed hazardous waste using the flue gas inside the rotary kiln during the calcination of hazardous waste; and a driving mechanism is provided on the base for driving the rotary kiln, the crushing mechanism, and the preheating mechanism.

[0005] The installation mechanism includes two support rings, which are distributed on the front and rear sides of the rotary kiln. Fixed rings are symmetrically fixedly connected to the front and rear sides of the rotary kiln, and the fixed rings on the front and rear sides are rotatably connected to the support rings on the front and rear sides, respectively. The front support ring is rotatably connected to the base, and the rear base is provided with a lifting mechanism, which is used to drive the rear end of the rotary kiln to rise and fall.

[0006] The lifting mechanism includes a fixed frame, which is located at the bottom of the base and is fixedly connected to the base; a groove is provided on the base above the fixed frame, and a cylinder is provided in the groove. The bottom end of the cylinder is rotatably connected to the fixed frame, and the upper end of the cylinder is rotatably connected to the rear support ring.

[0007] The crushing mechanism includes two crushing rollers, which are symmetrically distributed on the front and rear sides of the crushing box. The crushing rollers are rotatably connected to the crushing box. First pulleys are symmetrically rotatably connected to the left and right sides of the crushing box, and the first pulleys on the left and right sides are respectively fixedly connected to the left and right ends of the front crushing roller.

[0008] The preheating mechanism includes a first sealing cover, which is sealed and fitted to the rear feed inlet of the rotary kiln, and the honeycomb plate is fixedly connected to the rotary kiln by multiple bolts; a metal pipe is fixedly connected to the first sealing cover, and a hopper is fixedly connected to the upper end of the metal pipe; the metal pipe is slidably connected to the bottom side of the connecting box, and the hopper is sealed and fitted to the inner wall of the connecting box; a flue gas pipe is fixedly connected to the rear side of the connecting box; a blocking mechanism is provided inside the connecting box, which is used to prevent the preheating hazardous waste from entering the rotary kiln when the hazardous waste is calcined; a sealing mechanism is provided above the connecting box, which is used to prevent the flue gas inside the connecting box from leaking out when the crushed hazardous waste is transported into the connecting box.

[0009] The blocking mechanism includes two metal meshes, which are symmetrically distributed on the front and rear sides of the connecting box. The two metal meshes are close to each other at one end and are rotatably connected to the connecting box at the other end. A stop bar is fixedly connected to the bottom of the metal meshes.

[0010] The sealing mechanism includes a rotating rod, on which eight conveying plates are uniformly and fixedly connected. The eight conveying plates are arranged in a circumferential array on the rotating rod. All eight conveying plates are sealed and fitted against the inner wall of the connecting box. At most three conveying plates on the front and rear sides of the rotating rod can be in contact with the inner wall of the connecting box at the same time. Second pulleys are symmetrically and rotatably connected to the left and right sides of the connecting box. The second pulleys on the left and right sides are fixedly connected to the left and right ends of the rotating rod, respectively.

[0011] The drive mechanism includes a support frame, which is fixedly connected to the base and has a motor fixedly connected to it. The motor is inclined, with the front lower than the rear. A gear is fixedly connected to the rear end of the motor output shaft, and a first bevel gear is fixedly connected to the rear end of the gear. The first bevel gear is rotatably connected to the support frame. A second bevel gear meshes with the first bevel gear, which is rotatably connected to the support frame. Third pulleys are symmetrically fixedly connected to the left and right ends of the second bevel gear. A belt is provided on the third pulley, and the belt meshes with the first pulley, the second pulley, and the third pulley simultaneously. An external gear ring is fixedly connected to the rotary kiln, and the external gear ring meshes with the gear.

[0012] The front end of the rotary kiln is provided with a second sealing cover, which is sealed and fitted to the front discharge port of the rotary kiln; the second sealing cover is rotatably connected to the rotary kiln.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This invention involves placing hazardous waste into a crushing box, then activating a drive mechanism. The drive mechanism rotates the rotary kiln and operates the crushing mechanism, which crushes the hazardous waste in the crushing box into small pieces. This facilitates improving the calcination effect of the rotary kiln on the hazardous waste and the preheating effect of the preheating mechanism on the hazardous waste.

[0015] 2. In this invention, after the hazardous waste is crushed by the crushing mechanism and falls into the connecting box, the high-temperature flue gas generated during the operation of the rotary kiln directly calcines the hazardous waste inside, thus heating the hazardous waste inside the connecting box. When the hazardous waste enters the rotary kiln after being preheated by the high-temperature flue gas, the rotary kiln can quickly heat it to the calcination temperature, while also effectively reducing the heat loss of the rotary kiln, achieving energy-saving and environmental protection effects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the disassembled structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the installation mechanism in this invention;

[0020] Figure 5 This is a schematic diagram of the drive mechanism in this invention;

[0021] Figure 6This is a schematic diagram of the connecting box in this invention;

[0022] Figure 7 This is a cross-sectional view of the connecting box in this invention;

[0023] Figure 8 This is a schematic diagram of the unfolded state of the metal mesh in this invention;

[0024] Figure 9 for Figure 8 A magnified structural diagram of A in the middle.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Base; 2. Rotary furnace; 3. Support plate; 4. Crushing box; 5. Connecting box; 6. Support ring; 7. Fixing ring; 8. Fixing frame; 9. Groove; 10. Cylinder; 11. Crushing drum; 12. First pulley; 13. First sealing cover; 14. Metal pipe; 15. Hopper; 16. Flue gas pipe; 17. Metal mesh; 18. Baffle bar; 19. Rotating rod; 20. Conveying plate; 21. Second pulley; 22. Support frame; 23. Motor; 24. Gear; 25. First bevel gear; 26. Second bevel gear; 27. Third pulley; 28. Belt; 29. ​​External gear ring; 30. Second sealing cover. Detailed Implementation

[0027] Please see Figure 1-9 This invention provides a technical solution: an energy-saving rotary kiln for hazardous waste treatment, comprising a base 1, a rotary kiln 2 mounted on the base 1, and an installation mechanism between the rotary kiln 2 and the base 1 for mounting the rotary kiln 2 on the base 1; two support plates 3 are fixedly connected to the rear side of the base 1, a crushing box 4 is located between the two support plates 3, and a connecting box 5 is fixedly connected to the bottom of the crushing box 4, the connecting box 5 being rotatably connected to the support plates 3 on the left and right sides; a crushing mechanism is provided inside the crushing box 4 for crushing hazardous waste into small pieces; a preheating mechanism is provided inside the connecting box 5 for preheating the crushed hazardous waste using the flue gas inside the rotary kiln 2 when the rotary kiln 2 is calcining the hazardous waste; and a driving mechanism is provided on the base 1 for driving the rotary kiln 2, the crushing mechanism, and the preheating mechanism.

[0028] like Figure 1-2As shown, during operation, when hazardous waste needs to be calcined in the rotary kiln 2, the hazardous waste is first placed into the crushing box 4, and then the drive mechanism is started. The drive mechanism drives the rotary kiln 2 to rotate and the crushing mechanism to run. The crushing mechanism crushes the hazardous waste in the crushing box 4 into small pieces, which can facilitate the improvement of the calcination effect of the rotary kiln 2 on the hazardous waste and the preheating effect of the preheating mechanism on the hazardous waste. The hazardous waste crushed by the crushing mechanism will then fall directly into the connecting box 5. When the rotary kiln 2 is running, it will directly calcine the hazardous waste inside. The high-temperature flue gas generated during calcination will enter the connecting box 5, which can heat the hazardous waste in the connecting box 5. When the hazardous waste enters the rotary kiln 2 after being preheated by the high-temperature flue gas, the rotary kiln 2 can quickly heat it to the calcination temperature, and at the same time effectively reduce the heat loss of the rotary kiln 2, achieving the effect of energy saving and environmental protection.

[0029] like Figure 3-4 As shown, as a further embodiment of the present invention, the installation mechanism includes two support rings 6, which are distributed on the front and rear sides of the rotary kiln 2; fixed rings 7 are symmetrically fixedly connected to the front and rear sides of the rotary kiln 2, and the fixed rings 7 on the front and rear sides are rotatably connected to the support rings 6 on the front and rear sides respectively; the front support ring 6 is rotatably connected to the base 1, and the rear base 1 is provided with a lifting mechanism, which is used to drive the rear end of the rotary kiln 2 to rise and fall;

[0030] The lifting mechanism includes a fixed frame 8, which is located at the bottom of the base 1 and is fixedly connected to the base 1; a groove 9 is provided on the base 1 above the fixed frame 8, and a cylinder 10 is provided in the groove 9. The bottom end of the cylinder 10 is rotatably connected to the fixed frame 8 and the upper end of the cylinder 10 is rotatably connected to the rear support ring 6.

[0031] During operation, when hazardous waste needs to be fed into the rotary kiln 2, it must be fed in through the feed inlet at the rear of the rotary kiln 2. At this time, the rotary kiln 2 needs to be kept horizontal. When the hazardous waste is fed into the rotary kiln 2, the rotary kiln 2 is started and begins to calcine the hazardous waste. At the same time, the rotary kiln 2 needs to be adjusted to a rear-high, front-low position. When the rotary kiln 2 is rotated in this position, the hazardous waste inside the rotary kiln 2 can gradually move forward. By starting the cylinder 10, the rear support ring 6 can be moved upward. When the rear support ring 6 moves upward, it will push the rear part of the rotary kiln 2 upward. At this time, the front part of the rotary kiln 2 will drive the front support ring 6 to rotate forward relative to the base 1.

[0032] like Figure 7As shown, as a further embodiment of the present invention, the crushing mechanism includes two crushing rollers 11, which are symmetrically distributed on the front and rear sides of the crushing box 4; the crushing rollers 11 are rotatably connected to the crushing box 4; first pulleys 12 are symmetrically rotatably connected on the left and right sides of the crushing box 4, and the first pulleys 12 on the left and right sides are respectively fixedly connected to the left and right ends of the front crushing roller 11.

[0033] During operation, when hazardous waste is placed into the crushing box 4, the drive mechanism is activated. The drive mechanism will drive the first pulleys 12 on the left and right sides of the crushing box 4 to rotate. When the first pulleys 12 rotate, they will drive the crushing roller 11 at the front position inside the crushing box 4 to start rotating. The front crushing roller 11 will work with the rear crushing roller 11 to crush the hazardous waste in the crushing box 4 and transport it downward. The hazardous waste that passes through the front and rear crushing rollers 11 will be broken into pieces and fall into the connecting box 5.

[0034] like Figure 6-9 As shown, as a further embodiment of the present invention, the preheating mechanism includes a first sealing cover 13, which is sealed and fitted to the rear feed inlet of the rotary kiln 2, and the honeycomb plate is fixedly connected to the rotary kiln 2 by multiple bolts; a metal pipe 14 is fixedly connected to the first sealing cover 13, and a hopper 15 is fixedly connected to the upper end of the metal pipe 14; the metal pipe 14 is slidably connected to the bottom part of the connecting box 5, and the hopper 15 is sealed and fitted to the inner wall of the connecting box 5; a flue gas pipe 16 is fixedly connected to the rear side of the connecting box 5; a blocking mechanism is provided inside the connecting box 5, which is used to prevent the preheating hazardous waste from entering the rotary kiln 2 when the hazardous waste is calcined in the rotary kiln 2; a sealing mechanism is provided above the connecting box 5, which is used to prevent the flue gas inside the connecting box 5 from leaking out when the pulverized hazardous waste is transported into the connecting box 5.

[0035] The blocking mechanism includes two metal meshes 17, which are symmetrically distributed on the front and rear sides of the connecting box 5. The two metal meshes 17 are close to each other at one end and are rotatably connected to the connecting box 5 at the other end. A stop bar 18 is fixedly connected to the bottom of each metal mesh 17.

[0036] The sealing mechanism includes a rotating rod 19, on which eight conveying plates 20 are uniformly and fixedly connected. The eight conveying plates 20 are arranged in a circumferential array on the rotating rod 19. All eight conveying plates 20 are sealed and fitted against the inner wall of the connecting box 5. At most three conveying plates 20 on the front and rear sides of the rotating rod 19 are in contact with the inner wall of the connecting box 5 at the same time. Second pulleys 21 are symmetrically and rotatably connected to the left and right sides of the connecting box 5. The second pulleys 21 on the left and right sides are fixedly connected to the left and right ends of the rotating rod 19, respectively.

[0037] During operation, when the rotary kiln 2 begins calcination, it drives the metal tube 14 upward within the connecting box 5. The metal tube 14 then drives the hopper 15 upward. When the hopper 15 reaches its highest position, it supports the metal meshes 17 on both sides, ensuring they rotate to a horizontal position and fit together. At this time, the drive rod 19 rotates, causing the eight connected conveyor plates 20 to rotate as well. The hazardous waste pulverized by the crushing drum 11 falls between the two upper conveyor plates 20. As the drive rod 19 rotates the conveyor plates 20, these two plates carry the hazardous waste between them along the drive rod. 19 rotates; when the two rotating rods 19 drive the hazardous waste to the bottom position, the hazardous waste will fall directly onto the two metal meshes 17; when the rotary kiln 2 is calcining, the high-temperature flue gas inside will enter the connecting box 5 through the metal pipe 14, and the high-temperature flue gas will pass through the metal mesh 17 and finally enter the flue gas pipe 16; when the high-temperature flue gas passes through the metal mesh 17, it will heat the hazardous waste on the metal mesh 17, so that the hazardous waste can quickly reach the calcination temperature when it enters the rotary kiln 2 for calcination; and because the conveying plate 20 is always in contact with the inner wall of the connecting box 5 when the rotating rods 19 rotate, the flue gas cannot enter the crushing box 4 and can only be discharged through the flue gas pipe 16.

[0038] like Figure 3-5 As shown, as a further embodiment of the present invention, the driving mechanism includes a support frame 22, which is fixedly connected to the base 1 and a motor 23 is fixedly connected to the support frame 22. The motor 23 is inclined with a lower front and a higher rear. A gear 24 is fixedly connected to the rear end of the output shaft of the motor 23, and a first bevel gear 25 is fixedly connected to the rear end of the gear 24. The first bevel gear 25 is rotatably connected to the support frame 22. A second bevel gear 26 meshes with the first bevel gear 25. The second bevel gear 26 is rotatably connected to the support frame 22, and a third belt 27 is symmetrically fixedly connected to both ends of the second bevel gear 26. A belt 28 is provided on the third belt 27, and the belt 28 meshes with the first pulley 12, the second pulley 21, and the third belt 27 simultaneously. An external gear ring 29 is fixedly connected to the rotary kiln 2, and the external gear ring 29 meshes with the gear 24.

[0039] During operation, after the hazardous waste in rotary kiln 2 has been calcined, the slag inside is cleaned out. Then, cylinder 10 is activated to retract, which in turn moves the rear support ring 6 downwards. The rotary kiln 2 then begins to rotate downwards. When the rotary kiln 2 rotates to a horizontal position, cylinder 10 stops. As the rotary kiln 2 rotates downwards, it also moves the metal pipe 14 and hopper 15 downwards. As the hopper 15 moves downwards, it gradually detaches from the metal mesh 17. Without support, the metal mesh 17 naturally rotates downwards. As the two metal meshes 17 rotate downwards, the hazardous waste on their surfaces falls directly into the hopper 15 and then through the metal pipe 14 into the rotary kiln 2. Once all the hazardous waste has fallen into the rotary kiln 2, at this point... When the starting cylinder 10 moves the rear support ring 6 upward, the rotary kiln 2 will rotate upward. After the rotary kiln 2 rotates upward at a certain angle, the external gear ring 29 connected to it will mesh with the gear 24. At the same time, the hopper 15 will also move to the uppermost position and support the metal mesh 17 again. At this time, the motor 23 is started, which will drive the gear 24 to rotate. When the gear 24 rotates, it will drive the rotary kiln 2 to rotate through the external gear ring 29. At the same time, the gear 24 will also drive the first bevel gear 25 to rotate. The first bevel gear 25 will drive the second bevel gear 26 to rotate. The second bevel gear 26 will drive the third belt 27 on the left and right sides to rotate. When the third belt 27 rotates, it will drive the first pulley 12 and the second pulley 21 to rotate through the belt 28.

[0040] like Figure 4 As shown, as a further embodiment of the present invention, the front end of the rotary kiln 2 is provided with a second sealing cover 30, which is sealed and fitted to the front discharge port of the rotary kiln 2; the second sealing cover 30 is rotatably connected to the rotary kiln 2.

[0041] During operation, once the hazardous waste inside the rotary kiln 2 has been calcined, the calcined slag can be removed by opening the second sealing cover 30 on the front side.

Claims

1. An energy saving rotary kiln for hazardous waste treatment comprising a base (1), characterized in that: A rotary kiln (2) is provided on the base (1), and an installation mechanism is provided between the rotary kiln (2) and the base (1). The installation mechanism is used to install the rotary kiln (2) on the base (1). Two support plates (3) are fixedly connected to the rear side of the base (1). A crushing box (4) is provided between the two support plates (3). A connecting box (5) is fixedly connected to the bottom of the crushing box (4). The connecting box (5) is rotatably connected to the support plates (3) on the left and right sides. A crushing mechanism is provided inside the crushing box (4). The crushing mechanism is used to crush hazardous waste into small pieces. A preheating mechanism is provided inside the connecting box (5). The preheating mechanism is used to preheat the crushed hazardous waste by means of the flue gas inside the rotary kiln (2) when the rotary kiln (2) calcines the hazardous waste. A driving mechanism is provided on the base (1). The driving mechanism is used to drive the rotary kiln (2), the crushing mechanism and the preheating mechanism to operate. The preheating mechanism includes a first sealing cover (13), which is sealed and fitted to the rear feed port of the rotary kiln (2) and fixedly connected to the rotary kiln (2) by multiple bolts; a metal pipe (14) is fixedly connected to the first sealing cover (13), and a hopper (15) is fixedly connected to the upper end of the metal pipe (14); the metal pipe (14) is slidably connected to the bottom part of the connecting box (5), and the hopper (15) is sealed and fitted to the inner wall of the connecting box (5); a flue gas pipe (16) is fixedly connected to the rear side of the connecting box (5); a blocking mechanism is provided inside the connecting box (5), which is used to prevent the preheating hazardous waste from entering the rotary kiln (2) when the hazardous waste is calcined in the rotary kiln (2); a sealing mechanism is provided above the connecting box (5), which is used to prevent the flue gas inside the connecting box (5) from leaking out when the crushed hazardous waste is transported into the connecting box (5); The sealing mechanism includes a rotating rod (19), on which eight conveying plates (20) are uniformly fixedly connected. The eight conveying plates (20) are arranged in a circular array on the rotating rod (19). All eight conveying plates (20) are sealed and fitted against the inner wall of the connecting box (5). At most three conveying plates (20) on the front and rear sides of the rotating rod (19) are in contact with the inner wall of the connecting box (5) at the same time. The connecting box (5) is symmetrically and rotatably connected to the left and right sides. The second pulleys (21) on the left and right sides are fixedly connected to the left and right ends of the rotating rod (19) respectively. The drive mechanism includes a support frame (22), which is fixedly connected to the base (1) and a motor (23) is fixedly connected to the support frame (22). The motor (23) is inclined with the front lower and the rear higher. A gear (24) is fixedly connected to the rear end of the output shaft of the motor (23). A first bevel gear (25) is fixedly connected to the rear end of the gear (24). The first bevel gear (25) is rotatably connected to the support frame (22). A second bevel gear (26) meshes with the first bevel gear (25). The second bevel gear (26) is rotatably connected to the support frame (22). A third pulley (27) is symmetrically fixedly connected to the left and right ends of the second bevel gear (26). A belt (28) is provided on the third pulley (27). The belt (28) meshes with the first pulley (12), the second pulley (21), and the third pulley (27) at the same time. An external gear ring (29) is fixedly connected to the rotary kiln (2). The external gear ring (29) meshes with the gear (24).

2. The energy saving rotary kiln for hazardous waste treatment according to claim 1, characterized in that: The installation mechanism includes two support rings (6), which are distributed on the front and rear sides of the rotary kiln (2); fixed rings (7) are symmetrically fixed on the front and rear sides of the rotary kiln (2), and the fixed rings (7) on the front and rear sides are rotatably connected to the support rings (6) on the front and rear sides respectively; the support ring (6) on the front side is rotatably connected to the base (1), and a lifting mechanism is provided on the base (1) on the rear side. The lifting mechanism is used to drive the rear end of the rotary kiln (2) to rise and fall; the lifting mechanism includes a fixed frame (8), which is located at the bottom of the base (1) and is fixedly connected to the base (1); a groove (9) is provided on the base (1) above the fixed frame (8), and a cylinder (10) is provided in the groove (9). The bottom end of the cylinder (10) is rotatably connected to the fixed frame (8), and the upper end of the cylinder (10) is rotatably connected to the support ring (6) on the rear side.

3. The energy saving rotary kiln for hazardous waste treatment according to claim 1, characterized in that: The crushing mechanism includes two crushing rollers (11), which are symmetrically distributed on the front and rear sides of the crushing box (4); the crushing rollers (11) are rotatably connected to the crushing box (4); the crushing box (4) is symmetrically rotatably connected to the left and right sides of the crushing box (4), and the first pulleys (12) on the left and right sides are respectively fixedly connected to the left and right ends of the front crushing roller (11).

4. The energy saving rotary kiln for hazardous waste treatment according to claim 1, characterized in that: The blocking mechanism includes two metal meshes (17), which are symmetrically distributed on the front and rear sides of the connecting box (5); the two metal meshes (17) are close to each other at one end and are rotatably connected to the connecting box (5) at the other end; a stop bar (18) is fixedly connected to the bottom of the metal meshes (17).

5. The energy saving rotary kiln for hazardous waste treatment according to claim 1, characterized in that: The front end of the rotary kiln (2) is provided with a second sealing cover (30), which is sealed and fitted to the front discharge port of the rotary kiln (2); the second sealing cover (30) is rotatably connected to the rotary kiln (2).

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