An inlet control system for heat recovery from a rotary kiln

Abstract

The present application relates to heat recovery technical field, and disclose a kind of for rotary kiln heat recovery import control system, including main cylinder, support structure and transmission structure, the surface of the main cylinder is equipped with slip ring, its main cylinder is clamped on support structure by slip ring, the transmission structure is used to drive main cylinder self-rotation, the inside of the main cylinder is equipped with several head-to-tail adjacent step pipes, the inner wall side of its step pipe is heat exchange groove, and the outer wall side of its step pipe is material groove;The left side of the main cylinder is provided with several gas inlet branch pipes, and the other end of the gas inlet branch pipe is penetrated into the inside of heat exchange groove.The present application is adjacent to the step pipe of head-to-tail by being arranged in the inside of main cylinder to carry out air flow, and high-temperature calcined material will flow along precipitous end on the surface of step pipe, so it can maximize the heat in high-temperature calcined material to be transferred to the air in step pipe, to realize high-efficiency heat recovery.

Description

Technical Field

[0001] This invention relates to the field of heat recovery technology, and more specifically to an import control system for heat recovery in rotary kilns. Background Technology

[0002] Lithium carbonate processing requires roasting, followed by cooling. Currently, two main methods are used for heat recovery: 1. Installing a recovery unit outside the rotary kiln to recover waste heat, but this method suffers from significant heat loss. 2. Directly extending into the rotary kiln to recover high-temperature flue gas, but this method results in low-purity flue gas that cannot be used directly.

[0003] An existing patent discloses a rotary kiln oxygen-enriched combustion device with a heat recovery unit (publication number CN117968370A). This device includes a raw material silo, a transfer box, a kiln body, a recovery component, a smoke chamber, a drive mechanism, a collection component, a placement platform, an oxygen-enriching mechanism, and a fuel silo. The kiln body is inclined above the drive mechanism, which rolls to support it. The drive mechanism is connected to the kiln body via a transmission connection. A transfer box is located at one end of the kiln body, and the kiln body is rotatably connected to it. The end of the kiln body inside the transfer box has an opening. The heat recovery efficiency for high-temperature roasted materials disclosed in this patent is relatively low. Furthermore, because the high-temperature roasted material does not completely fill the pipes, the portion of the pipe not filled with the high-temperature roasted material has low efficiency in heat exchange with air. Summary of the Invention

[0004] The main technical problem solved by this invention is to provide an inlet control system for heat recovery in rotary kilns, thereby resolving the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, more specifically, an inlet control system for heat recovery in a rotary kiln, comprising a main cylinder, a support structure, and a transmission structure, wherein a slip ring is fitted on the surface of the main cylinder, and the main cylinder is secured to the support structure by the slip ring; the transmission structure is used to drive the main cylinder to rotate; and the interior of the main cylinder is provided with a plurality of stepped tubes that are adjacent to each other, wherein the inner wall of the stepped tubes is a heat exchange groove, and the outer wall of the stepped tubes is a material trough.

[0006] The left side of the main cylinder is provided with several air inlet branch pipes, the other end of which extends into the interior of the heat exchange groove. The right end of the main cylinder is provided with a main air collection pipe. The left end of the main air collection pipe is sealed, and several air collection branch pipes extend through the left side of the main air collection pipe. The heat exchange groove is connected to the main air collection pipe.

[0007] Furthermore, a sleeve is movably fitted on the right end of the main cylinder, and a feed chute is installed on the right end of the sleeve. The other end of the feed chute extends into the material trough. The main air intake pipe passes through the inner wall of the feed chute but does not contact the inner wall of the feed chute. A discharge hood is fitted on the left end of the main cylinder.

[0008] Furthermore, a sealing sleeve is fitted on the surface of the main cylinder and in the area of ​​the air intake branch pipe, and the sealing sleeve contacts the surface of the main cylinder to form a sealing cavity, and the air intake branch pipe is located inside the sealing cavity.

[0009] An air inlet pipe is connected to the surface of the sealing sleeve, and the other end of the air inlet pipe extends into the interior of the sealing cavity.

[0010] Furthermore, air inlets are provided on both the left and right sides of the air intake branch pipe, and a plug that can move up and down is provided inside the air intake branch pipe and between the two air inlets.

[0011] A fixed shaft 2 is fixedly connected inside the intake manifold and below the plug cover. A connecting platform is sleeved in the middle area of ​​the surface of the fixed shaft 2. A tension spring 2 is connected to the upper surface of the connecting platform, and the other end of the tension spring 2 is connected to the plug cover.

[0012] Furthermore, inside the intake manifold and above the plug cover, there are two rotating shafts in sequence: a first rotating shaft and a second rotating shaft.

[0013] The rotating shaft includes a front shaft and a rear shaft. An elliptical wheel is fitted on the surface of the front shaft. Two pairs of fixed vertical plates are provided on the inner wall of the front side of the intake manifold. A fixed sliding rod is fixedly connected between each pair of fixed vertical plates. A lifting arc plate that can be raised and lowered is provided between the left and right fixed sliding rods. The shape of the lower surface of the lifting arc plate matches the shape of the elliptical wheel.

[0014] Both of the fixed sliding rods are fitted with springs, and the other end of the springs is in pressure contact with the lifting arc plate.

[0015] Furthermore, a rotating arm is fitted at one end of each of the front and rear axles, and a fixed shaft is fixedly connected between the two rotating arms.

[0016] The upper surface of the plug is provided with a fixed shaft, and a connecting rod is sleeved between the fixed shaft and the fixed shaft.

[0017] Furthermore, a rotating disk is fitted onto the surface of the rear axle, and a rotating collar is rotatably fitted onto the surface of the rotating disk. The surface of the rotating disk has several movable teeth, and the inner surface of the rotating collar has several inclined grooves, wherein the movable teeth are engaged with the inner wall of the inclined grooves to restrict the rotation direction of the rotating collar.

[0018] Furthermore, a rotating block is fixedly connected directly below the rotating collar, and a limiting plate is provided on the inner wall of the intake branch pipe below the rotating block, with the limiting plate colliding and contacting the rotating block.

[0019] Furthermore, a fixing plate is provided on the inner wall of the intake branch pipe, located above and to the right of the rotating disk;

[0020] A rotating wheel is fitted on the surface of the rotating shaft one and above the rotating disk. A traction rope is connected to the lower surface of the rotating wheel. The other end of the traction rope passes through the surface of the rotating collar, the rotating block and the fixed plate, and is fitted with a spring two and a limit cap.

[0021] The traction rope is fixedly connected to the rotating block, and the traction rope is interlocked with the fixed plate.

[0022] Furthermore, a toggle frame is fitted in the middle area of ​​the surface of the rotating shaft, and a partition is provided inside the toggle frame. A tension spring is connected to both the left and right sides of the partition, and the other end of the tension spring is connected to the inner wall of the intake manifold.

[0023] The sealing sleeve has two blocks at the bottom inside, and the main cylinder rotates when its actuating frame collides with the blocks.

[0024] The beneficial effects of the inlet control system for heat recovery in rotary kilns according to the present invention are as follows:

[0025] 1. This invention uses stepped tubes with adjacent ends inside the main cylinder to facilitate airflow, and the high-temperature roasted material flows along the steep end of the stepped tube surface. This maximizes the transfer of heat from the high-temperature roasted material to the air inside the stepped tube, thereby achieving high-efficiency heat recovery.

[0026] 2. This invention provides a blocking cover inside the intake branch pipe, and the blocking cover is opened or closed when the actuating frame touches the stop block. This ensures that cold air always enters from the stepped pipe end close to the high-temperature roasting material, thereby maximizing the heat of the air. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 Enlarged view of region A in the middle;

[0030] Figure 3 This is the front view of the present invention;

[0031] Figure 4 This is a cross-sectional view of the stepped tube structure of the present invention;

[0032] Figure 5 This is a cross-sectional view of the main air intake structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the intake manifold structure of the present invention;

[0034] Figure 7 This is a schematic diagram of the intake manifold of the present invention;

[0035] Figure 8 This is a cross-sectional view of the intake manifold of the present invention;

[0036] Figure 9 This is a front view schematic diagram of the internal structure of the intake manifold of the present invention;

[0037] Figure 10 This is a rear view schematic diagram of the internal structure of the intake manifold of the present invention.

[0038] Figure 11 This is a cross-sectional view of the rotating disk structure of the present invention.

[0039] In the diagram: 1. Main cylinder; 2. Support structure; 3. Transmission structure; 4. Discharge hood; 5. Inlet branch pipe; 6. Feed chute; 7. Main air collection pipe; 8. Branch air collection pipe; 9. Slip ring; 10. Sealing sleeve; 11. Inlet pipe; 12. Sleeve; 13. Stepped pipe; 14. Heat exchange groove; 15. Material chute; 16. Stop block; 17. Actuating frame; 18. Air inlet; 19. Tension spring one; 20. Rotating wheel; 21. Partition plate; 22. Connecting platform; 23. Rotating shaft one; 24. Fixed vertical plate; 25. 26. Fixed slide bar; 27. Lifting arc plate; 28. Spring 1; 29. ​​Rotating shaft 2; 30. Elliptical wheel; 31. Fixed shaft 1; 32. Connecting rod; 33. Plug cap; 34. Tension spring 2; 35. Fixed shaft 3; 36. Rotating arm; 37. Limit cap; 38. Spring 2; 39. Fixed plate; 40. Rotating disc; 41. Traction rope; 42. Rotating collar; 43. Limit plate; 44. Rotating block; 45. Movable tooth; 2801. Front axle; 2802. Rear axle. Detailed Implementation

[0040] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0041] like Figure 1-11As shown, according to one aspect of the present invention, an inlet control system for heat recovery in a rotary kiln is provided, comprising a main cylinder 1, a support structure 2, and a transmission structure 3. A slip ring 9 is fitted onto the surface of the main cylinder 1, and the main cylinder 1 is secured to the support structure 2 via the slip ring 9. The transmission structure 3 is used to drive the main cylinder 1 to rotate (e.g., ...). Figure 3 As shown, the right end of the main cylinder 1 is higher than the left end of the main cylinder 1.

[0042] The main cylinder 1 has several stepped pipes 13 arranged end-to-end inside. The inner wall of each stepped pipe 13 forms a heat exchange groove 14, and the outer wall forms a material trough 15. Several air inlet branch pipes 5 are installed through the left side of the main cylinder 1, with the other end of each branch pipe extending into the heat exchange groove 14. A main air collecting pipe 7 is installed inside the right end of the main cylinder 1. The left end of the main air collecting pipe 7 is sealed, and several air collecting branch pipes 8 are installed through the left side of the main air collecting pipe 7. The heat exchange groove 14 is connected to the main air collecting pipe 7. A sleeve 12 is movably fitted onto the right end of the main cylinder 1. A feed trough 6 is installed at the right end of the sleeve 12, with the other end of the feed trough 6 extending into the material trough 15. The main air collecting pipe 7 passes through the inner wall of the feed trough 6 but does not contact it. A discharge hood 4 is fitted onto the left end of the main cylinder 1. By introducing the high-temperature roasted material from the feed trough 6, it flows along the material trough 15 to the left and is discharged from the discharge hood 4. During this process, cold air can be blown in from the air inlet pipe 11 and enter the air concentrator 7 through the heat exchange groove 14 for convergence.

[0043] In this embodiment, a sealing sleeve 10 is fitted on the surface of the main cylinder 1 in the area of ​​the air intake branch pipe 5. The sealing sleeve 10 contacts the surface of the main cylinder 1 to form a sealed cavity, and the air intake branch pipe 5 is located inside the sealed cavity. An air intake pipe 11 is connected to the surface of the sealing sleeve 10, and the other end of the air intake pipe 11 extends into the sealed cavity. Air inlets 18 are provided on both the left and right sides of the air intake branch pipe 5. A plug 32 that can move up and down is provided inside the air intake branch pipe 5 between the two air inlets 18. A fixed shaft 34 is fixedly connected inside the air intake branch pipe 5 below the plug 32. A connecting platform 22 is fitted on the middle area of ​​the surface of the fixed shaft 34. A tension spring 33 is connected to the upper surface of the connecting platform 22, and the other end of the tension spring 33 is connected to the plug 32 (e.g., Figure 8 As shown), the tension spring 33 can ensure that the plug cover 32 is in a blocked state without the intervention of external force.

[0044] In this embodiment, a first rotating shaft 23 and a second rotating shaft 28 are sequentially arranged inside the intake manifold 5 and above the plug cover 32. The second rotating shaft 28 includes a front shaft 2801 and a rear shaft 2802. An elliptical wheel 29 is fitted on the surface of the front shaft 2801. Two pairs of fixed vertical plates 24 are provided on the inner wall of the front side of the intake manifold 5. A fixed sliding rod 25 is fixedly connected between each pair of fixed vertical plates 24. A lifting arc plate 26 that can be raised and lowered is provided between the two fixed sliding rods 25. The shape of the lower surface of the lifting arc plate 26 matches the shape of the elliptical wheel 29. A spring 27 is fitted on the surface of each of the two fixed sliding rods 25. The other end of the spring 27 is in pressure contact with the lifting arc plate 26. A rotating arm 36 is fitted onto one end of each of the front axle 2801 and the rear axle 2802, and a fixed shaft 35 is fixedly connected between the two rotating arms 36; a fixed shaft 30 is provided on the upper surface of the plug cover 32, and a connecting rod 31 is fitted between the fixed shaft 30 and the fixed shaft 35 (e.g., Figure 8 As shown), the spring 27 will constantly press the lifting arc plate 26, which in turn presses the elliptical wheel 29 to keep it in a horizontal state.

[0045] In this embodiment, a rotating disk 40 is fitted onto the surface of the rear axle 2802, and a rotating collar 42 is rotatably fitted onto the surface of the rotating disk 40. The surface of the rotating disk 40 has several movable teeth 45, and the inner surface of the rotating collar 42 has several inclined grooves. The movable teeth 45 are engaged with the inner wall of the inclined grooves to restrict the rotation direction of the rotating collar 42. A rotating block 44 is fixedly connected directly below the rotating collar 42. A limiting plate 43 is provided on the inner wall of the intake manifold 5, located below the rotating block 44, and the limiting plate 43 contacts the rotating block 44. A fixing plate 39 is provided on the inner wall of the intake branch pipe 5 and above the right side of the rotating disk 40; a rotating wheel 20 is fitted on the surface of the rotating shaft 23 and above the rotating disk 40. A traction rope 41 is connected to the lower surface of the rotating wheel 20. The other end of the traction rope 41 passes through the surface of the rotating collar 42, the rotating block 44, and the fixing plate 39, and is fitted with a spring 38 and a limit cap 37; the traction rope 41 is fixedly connected to the rotating block 44, and the traction rope 41 is interlocked with the fixing plate 39. A deflector 17 is fitted in the middle area of ​​the surface of the rotating shaft 23. A partition 21 is provided inside the deflector 17. Tension springs 19 are connected to both sides of the partition 21. The other end of the tension springs 19 is connected to the inner wall of the intake branch pipe 5; two stops 16 are provided at the lower part of the interior of the sealing sleeve 10. When the main cylinder 1 rotates, the deflector 17 collides with the stops 16 (e.g., when the main cylinder 1 rotates). Figure 8 As shown, the mutual traction of the two tension springs 19 allows the actuating frame 17 to be in a vertical state.

[0046] The working principle of this device is as follows: 600℃ roasting material is introduced into the feed trough 6 (e.g., ...). Figure 1As shown), the main cylinder 1 rotates under the drive of the transmission structure 3. Outside air enters through the intake branch pipe 5 (as shown). Figure 6 As shown), after the actuating bracket 17 on the intake branch pipe 5 touches the stop block 16, the intake branch pipe 5 located between the two stops 16 is opened and in a conductive state. In this way, the cold air is heated in the heat exchange slot 14 and enters the main air exchange pipe 7 from the air exchange branch pipe 8 to realize the recovery of waste heat.

[0047] The specific working principle of the intake manifold 5 being opened and connected after the actuating bracket 17 touches the stop block 16 is as follows:

[0048] After the actuating bracket 17 is touched and deflected, it will drive the rotating wheel 20 to deflect via the rotating shaft 23 (e.g., Figure 10 , 11 As the rotating wheel 20 deflects, it drives the rotating collar 42 to rotate clockwise via the traction rope 41. Under the action of the movable tooth 45, it drives the rotating disk 40 to rotate clockwise, thus causing the rotating shaft 28 to deflect.

[0049] However, the rotating collar 42 drives the rotating disk 40 to rotate, but it can only deflect 100 to 110 degrees. At this time, the rotating shaft 28 on the other side plays a driving role (e.g., Figure 8 , 9 (As shown). When the elliptical wheel 29 rotates to a vertically tilted state, it overcomes the elastic force of the spring 27 on the lifting arc plate 26. At this time, the compression of the lifting arc plate 26 will cause the elliptical wheel 29 to continue rotating. That is, the rotating disk 40 causes the rotating arm 36 to rotate 100-110 degrees, and the compression of the lifting arc plate 26 will cause the rotating arm 36 to continue rotating to 180 degrees. In this way, with the periodic rotation of the rocker arm 36, the plugging cover 32 can be lifted to allow ventilation or pressed down to block.

[0050] All electrical components mentioned in this article are real-world electrical components.

[0051] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. An inlet control system for heat recovery in a rotary kiln, comprising a main cylinder (1), a support structure (2), and a transmission structure (3), wherein a slip ring (9) is fitted on the surface of the main cylinder (1), and the main cylinder (1) is secured to the support structure (2) via the slip ring (9), and the transmission structure (3) is used to drive the main cylinder (1) to rotate, characterized in that: The main cylinder (1) has several stepped tubes (13) that are adjacent to each other. The inner wall of the stepped tube (13) is a heat exchange groove (14), and the outer wall of the stepped tube (13) is a material groove (15). The left side of the main cylinder (1) is provided with several air inlet branch pipes (5), and the other end of the air inlet branch pipes (5) extends into the interior of the heat exchange groove (14). The right end of the main cylinder (1) is provided with a main air collection pipe (7). The left end of the main air collection pipe (7) is sealed, and several air collection branch pipes (8) extend through the left side of the main air collection pipe (7). The heat exchange groove (14) is connected to the main air collection pipe (7). A sealing sleeve (10) is fitted on the surface of the main cylinder (1) and in the area of ​​the air intake branch pipe (5). The sealing sleeve (10) contacts the surface of the main cylinder (1) to form a sealing cavity, and the air intake branch pipe (5) is located inside the sealing cavity. The surface of the sealing sleeve (10) is connected to an air inlet pipe (11), and the other end of the air inlet pipe (11) extends into the interior of the sealing cavity.

2. The inlet control system for rotary kiln heat recovery according to claim 1, characterized in that: The right end of the main cylinder (1) is movably fitted with a sleeve (12), and the right end of the sleeve (12) is fitted with a feed trough (6). The other end of the feed trough (6) extends into the material trough (15). The air concentrator (7) penetrates the inner wall of the feed trough (6) and does not contact the inner wall of the feed trough (6). The left end of the main cylinder (1) is fitted with a discharge hood (4).

3. The inlet control system for rotary kiln heat recovery according to claim 2, characterized in that: The air intake branch pipe (5) has air inlets (18) on both the left and right sides, and a plug (32) that can move up and down is provided inside the air intake branch pipe (5) and between the two air inlets (18). A fixed shaft two (34) is fixedly connected inside the intake branch pipe (5) and below the plug cover (32). A connecting platform (22) is sleeved in the middle area of ​​the surface of the fixed shaft two (34). A tension spring two (33) is connected to the upper surface of the connecting platform (22), and the other end of the tension spring two (33) is connected to the plug cover (32).

4. The inlet control system for rotary kiln heat recovery according to claim 3, characterized in that: Inside the intake branch pipe (5) and above the plug cover (32), there are rotating shaft one (23) and rotating shaft two (28) in sequence. The rotating shaft 2 (28) includes a front shaft (2801) and a rear shaft (2802). An elliptical wheel (29) is fitted on the surface of the front shaft (2801). Two pairs of fixed vertical plates (24) are provided on the inner wall of the front side of the air intake branch pipe (5). A fixed slide rod (25) is fixedly connected between each pair of fixed vertical plates (24). A lifting arc plate (26) that can be raised and lowered is provided between the two fixed slide rods (25). The shape of the lower surface of the lifting arc plate (26) matches the shape of the elliptical wheel (29). Both of the fixed slide bars (25) are fitted with springs (27), and the other end of the springs (27) is in pressure contact with the lifting arc plate (26).

5. The inlet control system for rotary kiln heat recovery according to claim 4, characterized in that: The front axle (2801) and the rear axle (2802) are each fitted with a rotating arm (36) at one end, and a fixed shaft (35) is fixedly connected between the two rotating arms (36). The upper surface of the plug cover (32) is provided with a fixed shaft one (30), wherein a connecting rod (31) is sleeved between the fixed shaft one (30) and the fixed shaft three (35).

6. The inlet control system for rotary kiln heat recovery according to claim 5, characterized in that: The rear axle (2802) is fitted with a rotating disk (40), and a rotating collar (42) is rotatably fitted on the surface of the rotating disk (40). The surface of the rotating disk (40) is provided with a plurality of movable teeth (45), and the inner surface of the rotating collar (42) is provided with a plurality of inclined grooves, wherein the movable teeth (45) are engaged in the inner wall of the inclined grooves to restrict the rotation direction of the rotating collar (42).

7. The inlet control system for rotary kiln heat recovery according to claim 6, characterized in that: A rotating block (44) is fixedly connected directly below the rotating collar (42). A limiting plate (43) is provided on the inner wall of the air intake branch pipe (5) and below the rotating block (44). The limiting plate (43) collides and contacts the rotating block (44).

8. The inlet control system for rotary kiln heat recovery according to claim 7, characterized in that: A fixing plate (39) is provided on the inner wall of the intake branch pipe (5) and above the right side of the rotating disk (40). A rotating wheel (20) is fitted on the surface of the rotating shaft (23) and above the rotating disk (40). A traction rope (41) is connected to the lower surface of the rotating wheel (20). The other end of the traction rope (41) passes through the surface of the rotating collar (42), the rotating block (44) and the fixing plate (39), and is fitted with a spring (38) and a limit cap (37). The traction rope (41) is fixedly connected to the rotating block (44), and the traction rope (41) is interlocked with the fixing plate (39).

9. The inlet control system for rotary kiln heat recovery according to claim 8, characterized in that: A lever frame (17) is fitted in the middle area of ​​the surface of the rotating shaft (23). A partition (21) is provided inside the lever frame (17). A tension spring (19) is connected to both the left and right sides of the partition (21). The other end of the tension spring (19) is connected to the inner wall of the intake branch pipe (5). The sealing sleeve (10) has two blocks (16) located at the bottom inside. When the main cylinder (1) rotates, its actuating frame (17) collides and contacts the blocks (16).

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