Rotary kiln waste heat recovery device with slow flow structure

Abstract

The invention discloses a rotary kiln waste heat recovery device with a flow slowing structure, and relates to the technical field of rotary kiln production design, the rotary kiln waste heat recovery device comprises a bottom plate and side plates symmetrically fixed on one side of the top of the bottom plate, a rotary kiln body is mounted on the inner sides of the two side plates, and the rotary kiln waste heat recovery device further comprises a protective cover mounted on the outer side of the rotary kiln body; the air inlet pipe is connected to one side of the top of the protective cover in a penetrating mode, and the other side of the top of the bottom plate is fixedly connected with a recycling box. The exhaust pipe is connected to the lower portion of one side of the recycling box in a penetrating mode, an air extracting pump is installed in the middle of the exhaust pipe, and a spiral water pipe is fixedly installed in the middle of the interior of the recycling box; the problems that in the prior art, collected hot air and a spiral pipe are extracted immediately after being in short contact, the heat utilization rate in the hot air is not high, a heat loss part still exists on the surface of the rotary kiln, and the waste heat recovery effect is reduced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kiln production design, and in particular to a rotary kiln waste heat recovery device with a slow flow structure. Background Art

[0002] When a rotary kiln processes materials, it is necessary to heat the materials. Since the rotary kiln requires a lot of heat in the process of processing materials, in order to avoid heat waste, the waste heat of the rotary kiln is generally recovered.

[0003] In the prior art, one method of waste heat recovery is to recover the hot air generated by the rotary kiln, and then use the collected hot air to heat the water inside the spiral tube, thereby realizing waste heat recovery. However, the hot air collected by this method is immediately extracted after a brief contact with the spiral tube, resulting in low heat utilization rate in the hot air, reducing the effect of waste heat recovery, and having certain defects. For example, a rotary kiln waste heat recovery device with announcement number CN219347370U is provided on the outer wall of the rotary kiln, which includes a heat absorbing plate, and a heat absorbing tube for storing water flow is provided inside the heat absorbing plate, which has the effect of improving energy utilization rate. However, the heat absorbing plate of the device is in contact with only part of the rotary kiln, and there is still a part of the rotary kiln surface that is not in contact with the heat absorbing plate, so that some heat is still lost, the waste heat recovery effect is not good, and there are also certain limitations.

[0004] Therefore, we propose a rotary kiln waste heat recovery device with a slow flow structure to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a rotary kiln waste heat recovery device with a slow flow structure to solve the problem in the prior art that the hot air collected is immediately extracted after a short contact with the spiral tube, resulting in low heat utilization rate in the hot air and part of the rotary kiln surface where heat is still lost, thereby reducing the effect of waste heat recovery.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a rotary kiln waste heat recovery device with a slow flow structure, comprising a bottom plate and side plates symmetrically fixed to one side of the top of the bottom plate, wherein the inner portion of the side plates is rotatably connected to a rotating rod, a rotary kiln body is mounted on the inner side of the two side plates, the rotary kiln body is fixedly connected to the rotating rod, and a feed port is mounted on one end of the rotating rod; Also includes: Protective cover, installed on the outside of the rotary kiln body; The air inlet pipe is connected to the top side of the protective cover; An exhaust pipe is connected to the lower part of one side of the recovery box; A slow-flow assembly is provided inside the recycling box, the slow-flow assembly comprising a second motor, the second motor being fixedly mounted on the top of the recycling box, the output end of the second motor passing through the recycling box and fixedly connected to a rotating shaft, the bottom end of the rotating shaft being fixedly connected to the bottom plate, the lower outer side of the rotating shaft being fixedly connected to a mounting sleeve, the outer side of the mounting sleeve being rotatably connected to a fan blade, the fan blade being arranged at an angle; The top of the mounting sleeve is fixedly connected to a mounting block, an inclined groove is provided inside the mounting block, an inclined rod is slidably connected inside the inclined groove, the inclined groove and the inclined rod are both inclined downward, the bottom end of the inclined rod abuts against the fan blade, a spring is fixedly connected to one side of the interior of the inclined groove, and the spring is fixedly connected to one end of the inclined groove.

[0007] Preferably, a motor 1 is fixedly mounted on one end of the top of the base plate, and the motor 1 is located on the side of the rotary kiln body away from the recovery box. A belt assembly is installed on the output end of the motor 1, and the motor 1 is adapted to be connected to the rotating rod through the belt assembly. A through hole is provided on the side of the protective cover close to the feed port, and the protective cover consists of two symmetrical parts in the upper and lower parts, and the inner ring diameter of the protective cover is larger than the outer ring diameter of the rotary kiln body.

[0008] By adopting the above technical solution, a slow flow component is provided, and the second motor is started to rotate slowly. The mounting block is subjected to centrifugal force to cause the inclined rod to slide outward, so that the inclination angle of the fan blade becomes larger, thereby increasing the wind output force of the fan blade. The hot air inside the recovery box will rise a certain distance, extending the residence time of the hot air inside the recovery box, increasing the contact time between the hot air and the spiral water pipe, facilitating the exchange of heat in the hot air with water in the spiral water pipe, and improving the waste heat recovery rate.

[0009] Preferably, a recovery box is fixedly connected to the other side of the top of the base plate, the end of the air inlet pipe away from the protective cover is connected to the recovery box, an air pump is installed in the middle of the exhaust pipe, and a spiral water pipe is fixedly installed in the middle of the recovery box, one end of the spiral water pipe passes through the recovery box and is connected to a water inlet, and the other end of the spiral water pipe passes through the recovery box and is connected to a drain, and the water inlet and drain are both located outside the recovery box.

[0010] By adopting the above technical solution, water can be injected into the interior and the water heated by the waste heat can be discharged for utilization.

[0011] The cam is fixedly provided with a bottom block at the lower outer side of the mounting sleeve, and a top block is fixedly connected to one side of the fan blade, and a spring is fixedly connected between the bottom block and the top block, and the fan blade is slidably connected to a push block on one side of the mounting sleeve, and one end of the push block is fixedly connected to a spring three, and the spring three is located inside the fan blade, and the recovery box is provided with a groove on the side close to the exhaust pipe, and the inside of the groove is vertically fixedly connected to a sliding rod, and the bottom of the sliding rod is sleeved with a blocking plate, and one side of the blocking plate is fixedly connected to an inclined block, and the inclined block is arranged to be inclined upward, and the outer side of the slide rod is slidably connected to a spring four, and the blocking plate is slidably connected to the exhaust pipe, and the fan blades are arranged in an array, and the fan blades are not less than four, and the number of the mounting blocks matches the fan blades, and the side of the inclined block close to the rotating shaft is located outside the groove.

[0012] By adopting the above technical solution, multiple fan blades are arranged to block hot air and improve the slow flow effect. When the fan blades rotate, the fan blades are driven by centrifugal force to drive the push block to be thrown outward, and the push block pulls the spring three to extend until the push block collides with the inclined block. The push block will squeeze and drive the inclined block to rise, and the rising of the inclined block will drive the blocking plate to rise. The blocking plate squeezes the spring four. At the same time, the rising of the blocking plate increases the air inlet cross-sectional area inside the exhaust duct, thereby increasing the extracted air volume.

[0013] Preferably, a blocking assembly is provided above the interior of the recovery box, and the blocking assembly includes a side shaft, which is symmetrically fixed to the upper inner part of the recovery box, the outer side of the side shaft is rotatably connected to an air inlet plate, and the inner wall of the recovery box is fixedly connected to a fixed block.

[0014] By adopting the above technical solution, the vacuum pump draws air from the inside of the recovery box, causing the air inlet plate to expand downward, the air inlet plate drives the connecting rod to move downward, the connecting rod drives the sliding sleeve to press downward, the sliding sleeve squeezes the spring five, and the spring five contracts under the force, thereby facilitating the opening of the air inlet plate to allow air to enter.

[0015] Preferably, the fixed blocks are symmetrically arranged up and down, a fixed rod is fixedly connected between the upper and lower fixed blocks, the outer side of the fixed rod is slidably connected to the sliding sleeve, the bottom of the air inlet plate is rotatably connected to a connecting rod, and the end of the connecting rod away from the air inlet plate is rotatably connected to the sliding sleeve.

[0016] By adopting the above technical solution, when the fan blades blow air upward into the recycling box, the air inlet plate will be driven to swing upward to a certain angle, so that the blown hot air is temporarily stored at the bottom of the air inlet plate, thereby better contacting the spiral water pipe.

[0017] Preferably, a spring five is sleeved on the outer side of the fixed rod, the bottom end of the spring five is fixedly connected to the lower fixed block, the top end of the spring five is fixedly connected to the sliding sleeve, and the spring five is slidably connected to the fixed rod.

[0018] By adopting the above technical solution, spring five is used to assist the rotation and reset of the air inlet plate, thereby reducing the backflow of hot air into the air inlet pipe, and cooperates with the fan blades to further improve the utilization rate of heat in the hot air.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. A slow flow component is provided. Start the vacuum pump, and the vacuum pump extracts air from the inside of the recycling box through the exhaust pipe. The airflow drives the air inlet plate to open, and the hot air inside the protective cover is extracted into the recycling box through the air inlet pipe. Then start the motor 2 and rotate it slowly. The mounting block is subjected to centrifugal force to make the inclined rod slide outward, and the inclined rod stretches the inclined slot, so that when the inclined rod slides outward, it presses down one side of the fan blade, making the inclination angle of the fan blade larger, thereby increasing the wind force of the fan blade, making the hot air inside the recycling box rise a distance, extending the residence time of the hot air inside the recycling box, and increasing the contact time between the hot air and the spiral water pipe, which is convenient for the heat in the hot air to interact with the water in the spiral water pipe. The fan blades rotate, and when the fan blades rotate, the centrifugal force drives the push block to be thrown outward, and the push block squeezes and drives the inclined block to rise. The rising of the inclined block drives the baffle plate to rise, and the baffle plate squeezes the spring 4. At the same time, the rising of the baffle plate increases the air inlet cross-sectional area inside the exhaust pipe, thereby increasing the extracted air volume, thereby keeping the air inlet plate in an open state, reducing the situation where the air inlet plate is closed due to the blowing of the fan blades, and improving the waste heat recovery rate. This solves the problem that the hot air collected in the prior art is immediately extracted after a short contact with the spiral tube, resulting in low heat utilization rate in the hot air, and there is still a part of the heat lost on the surface of the rotary kiln, which reduces the effect of waste heat recovery. 2. A blocking component is provided. When in use, the vacuum pump draws air from the inside of the recovery box, causing the air inlet plate to expand downward, the air inlet plate drives the connecting rod to move downward, the connecting rod drives the sliding sleeve to press downward, the sliding sleeve squeezes the spring five, and the spring five is forced to shrink, thereby facilitating the opening of the air inlet plate to let in air. At the same time, when the fan blades blow air upward to the inside of the recovery box, the air inlet plate will be driven to reset and swing upward to a certain angle, so that the blown hot air is temporarily stored at the bottom of the air inlet plate, thereby better contacting the spiral water pipe, reducing the situation where the hot air flows back into the air inlet pipe, and cooperating with the fan blades to further improve the utilization rate of the heat in the hot air. The wrapped protective cover is convenient for fully collecting the heat on the surface of the rotary kiln body, increasing the area of ​​waste heat recovery, and solving the problem that there is still heat loss on the surface of the rotary kiln, which reduces the effect of waste heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the recycling box of the present invention; Figure 3 This is a schematic diagram of the installation structure of the installation sleeve of the present invention; Figure 4 For the present invention Figure 1 A in the middle is an enlarged structural diagram; Figure 5 For the present invention Figure 2 The enlarged structural diagram at B in the middle; Figure 6 This is a schematic diagram of the air inlet plate installation structure of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at C in the middle; Figure 8 This is a schematic diagram of the first three-dimensional overall structure of the present invention; Figure 9 This is a schematic diagram of the second three-dimensional overall structure of the present invention.

[0021] In the figure: 1. bottom plate; 2. side plate; 3. rotating rod; 4. rotary kiln body; 5. motor 1; 6. belt assembly; 7. feed port; 8. protective cover; 9. air inlet pipe; 10. recovery box; 11. exhaust pipe; 12. vacuum pump; 13. spiral water pipe; 14. water inlet; 15. drain outlet; 16. motor 2; 17. rotating shaft; 18. mounting sleeve; 19. fan blade; 20. mounting block; 21. inclined slot; 22. inclined rod; 23. spring 1; 24. bottom block; 25. top block; 26. spring 2; 27. push block; 28. spring 3; 29. ​​groove; 30. slide rod; 31. inclined block; 32. spring 4; 33. blocking plate; 34. side shaft; 35. air inlet plate; 36. fixed block; 37. fixed rod; 38. sliding sleeve; 39. connecting rod; 40. spring 5. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 2 The present invention provides a technical solution: a rotary kiln waste heat recovery device with a slow flow structure, comprising a bottom plate 1 and a side plate 2 symmetrically fixed to one side of the top of the bottom plate 1, wherein the inner portion of the side plate 2 is rotatably connected to a rotating rod 3, a rotary kiln body 4 is installed on the inner side of the two side plates 2, the rotary kiln body 4 is fixedly connected to the rotating rod 3, and a feed port 7 is installed at one end of the rotating rod 3; The protective cover 8 is installed on the outside of the rotary kiln body 4. The protective cover 8 consists of two symmetrical parts, and the inner diameter of the protective cover 8 is larger than the outer diameter of the rotary kiln body 4. The air inlet pipe 9 is connected to one side of the top of the protective cover 8, and the other side of the top of the bottom plate 1 is fixedly connected to the recovery box 10. The end of the air inlet pipe 9 away from the protective cover 8 is connected to the recovery box 10; An exhaust pipe 11 is connected to the lower part of one side of the recovery box 10. An air pump 12 is installed in the middle of the exhaust pipe 11. A spiral water pipe 13 is fixedly installed in the middle of the recovery box 10. One end of the spiral water pipe 13 passes through the recovery box 10 and is connected to a water inlet 14. The other end of the spiral water pipe 13 passes through the recovery box 10 and is connected to a drain 15. The water inlet 14 and the drain 15 are both located outside the recovery box 10. The slow flow component is arranged inside the recycling box 10. The slow flow component includes a second motor 16. The second motor 16 is fixedly installed on the top of the recycling box 10. The output end of the second motor 16 passes through the recycling box 10 and is fixedly connected to a rotating shaft 17. The bottom end of the rotating shaft 17 is fixedly connected to the bottom plate 1. The outer side of the lower part of the rotating shaft 17 is fixedly connected to a mounting sleeve 18. The outer side of the mounting sleeve 18 is rotatably connected to a fan blade 19. The fan blade 19 is set at an angle. The top of the mounting sleeve 18 is fixedly connected to a mounting block 20. An inclined slot 21 is provided inside the mounting block 20. An inclined rod 22 is slidably connected to the inside of the inclined slot 21. Both the inclined slot 21 and the inclined rod 22 are arranged to be tilted downward. The bottom end of the inclined rod 22 abuts against the fan blade 19. A spring 23 is fixedly connected to one side of the inclined slot 21. The spring 23 is fixedly connected to one end of the inclined slot 21. The fan blades 19 are arranged in an array, with no less than four fan blades 19. The number of the mounting blocks 20 matches the number of the fan blades 19. The side of the inclined block 31 close to the rotating shaft 17 is located outside the groove 29. A bottom block 24 is fixedly connected to the lower outer portion of the mounting sleeve 18, a top block 25 is fixedly connected to one side of the fan blade 19, a spring two 26 is fixedly connected between the bottom block 24 and the top block 25, a push block 27 is slidably connected to the side of the fan blade 19 away from the mounting sleeve 18, one end of the push block 27 is fixedly connected to a spring three 28, spring three 28 is located inside the fan blade 19, a groove 29 is provided on the side of the recovery box 10 close to the exhaust pipe 11, a slide rod 30 is vertically fixedly connected to the inside of the groove 29, a blocking plate 33 is sleeved on the bottom of the slide rod 30, a bevel block 31 is fixedly connected to one side of the blocking plate 33, the bevel block 31 is tilted upward, a spring four 32 is slidably connected to the outer side of the slide rod 30, and the blocking plate 33 is slidably connected to the exhaust pipe 11.

[0024] A motor 5 is fixedly installed at one end of the top of the base plate 1. The motor 5 is located on the side of the rotary kiln body 4 away from the recovery box 10. A belt assembly 6 is installed at the output end of the motor 5. The motor 5 is adapted to be connected to the rotating rod 3 through the belt assembly 6. A through hole is opened on the side of the protective cover 8 close to the feed port 7.

[0025] Example 1: Figure 3-Figure 5As shown, a slow flow component is provided. When the rotary kiln body 4 is working, the vacuum pump 12 is started, and the vacuum pump 12 exhausts air from the inside of the recovery box 10 through the exhaust pipe 11. The air flow drives the air inlet plate 35 to open, and the hot air inside the protective cover 8 is extracted into the recovery box 10 through the air inlet pipe 9. Then the motor 2 16 is started and rotated slowly. The motor 2 16 drives the rotating shaft 17 and the mounting sleeve 18 to rotate. The mounting sleeve 18 drives multiple fan blades 19 and the mounting block 20 around it to rotate. The mounting block 20 is subjected to centrifugal force to make the inclined rod 22 slide outward, and the inclined rod 22 stretches the inclined slot 21.

[0026] Since the spring 1 23 and the inclined rod 22 are arranged to be tilted downward, the inclined rod 22 will press one side of the fan blade 19 downward when it slides outward, so that the tilt angle of the fan blade 19 becomes larger, thereby increasing the wind output force of the fan blade 19, so that the hot air inside the recovery box 10 will rise a certain distance, extending the residence time of the hot air inside the recovery box 10, and increasing the contact time between the hot air and the spiral water pipe 13, which is convenient for the heat in the hot air to be exchanged with the water in the spiral water pipe 13. The fan blade 19 rotates slowly and only plays the role of blowing the hot air back, and will not affect the heat exchange and temperature rise of the spiral water pipe 13.

[0027] The spring 32 of the fourth spring 32 is pressed against the push block 27, and the push block 27 is pushed upward to push the inclined block 31. The inclined block 31 is lifted and the blocking plate 33 is lifted, and the blocking plate 33 is pressed against the spring 4 32. At the same time, the blocking plate 33 is lifted, so that the air inlet cross-sectional area inside the exhaust pipe 11 is increased, thereby increasing the amount of air extracted, thereby keeping the air inlet plate 35 in the open state, reducing the situation where the air inlet plate 35 is closed due to the blowing of the fan blades 19. The elastic coefficient of the spring 38 is greater than the elastic coefficient of the spring 4 32, so that the push block 27 can smoothly drive the inclined block 31 to rise, thereby improving the waste heat recovery rate, and solving the problem that the hot air collected in the prior art is immediately extracted after a short contact with the spiral tube, resulting in low heat utilization rate in the hot air, and there is still a part of heat loss on the surface of the rotary kiln, which reduces the effect of waste heat recovery.

[0028] A blocking assembly is provided above the interior of the recovery box 10, and the blocking assembly includes a side shaft 34, which is symmetrically fixed to the upper inner part of the recovery box 10, and the outer side of the side shaft 34 is rotatably connected to the air inlet plate 35, and the inner wall of the recovery box 10 is fixedly connected to a fixing block 36.

[0029] The fixed blocks 36 are symmetrically arranged in an upper and lower manner, and a fixed rod 37 is fixedly connected between the upper and lower fixed blocks 36. The outer side of the fixed rod 37 is slidably connected to the sliding sleeve 38. The bottom of the air inlet plate 35 is rotatably connected to a connecting rod 39, and the end of the connecting rod 39 away from the air inlet plate 35 is rotatably connected to the sliding sleeve 38.

[0030] A spring 5 40 is sleeved on the outer side of the fixing rod 37 , the bottom end of the spring 5 40 is fixedly connected to the lower fixing block 36 , the top end of the spring 5 40 is fixedly connected to the sliding sleeve 38 , and the spring 5 40 is slidably connected to the fixing rod 37 .

[0031] Example 2: Figure 6-Figure 9 As shown, a blocking component is provided. When in use, the suction pump 12 draws air from the inside of the recovery box 10, causing the air inlet plate 35 to expand downward, and the air inlet plate 35 drives the connecting rod 39 to move downward, and the connecting rod 39 drives the sliding sleeve 38 to press down, and the sliding sleeve 38 squeezes the spring five 40, and the spring five 40 is forced to shrink, thereby facilitating the opening of the air inlet plate 35 to let in air. At the same time, when the fan blades 19 blow air upward to the inside of the recovery box 10, it will drive the air inlet plate 35 to return to its original position and swing to a certain angle, so that the blown hot air is temporarily stored at the bottom of the air inlet plate 35, and then better contact with the spiral water pipe 13, reducing the situation where the hot air flows back into the air inlet pipe 9, and cooperating with the fan blades 19 to further improve the utilization rate of the heat in the hot air. The wrapped protective cover 8 is convenient for fully collecting the heat on the surface of the rotary kiln body 4, thereby increasing the area of ​​waste heat recovery, and solving the problem that there is still a part of heat loss on the surface of the rotary kiln, which reduces the effect of waste heat recovery.

[0032] Working principle: When using this device, first, Figures 1-9 As shown, when the rotary kiln body 4 is working, the vacuum pump 12 is started, and the vacuum pump 12 extracts air from the inside of the recovery box 10 through the exhaust pipe 11. The air flow drives the air inlet plate 35 to open, and the hot air inside the protective cover 8 is extracted into the recovery box 10 through the air inlet pipe 9. Then the motor 2 16 is started and rotated slowly. The motor 2 16 drives the rotating shaft 17 and the mounting sleeve 18 to rotate. The mounting sleeve 18 drives the multiple fan blades 19 and the mounting block 20 around it to rotate. The mounting block 20 is subjected to centrifugal force to make the inclined rod 22 slide outward. The inclined rod 22 stretches the inclined slot 21. Since the spring 1 23 and the inclined rod 22 are arranged to be tilted downward, the inclined rod 22 will press one side of the fan blade 19 downward when sliding outward, so that the tilt angle of the fan blade 19 becomes larger, thereby increasing the wind output force of the fan blade 19, causing the hot air inside the recovery box 10 to rise a certain distance, extending the residence time of the hot air inside the recovery box 10, and increasing the contact time between the hot air and the spiral water pipe 13, so as to facilitate the exchange of heat in the hot air with water in the spiral water pipe 13.

[0033] And when the fan blades 19 rotate, the fan blades 19 are driven by centrifugal force to drive the push block 27 to be thrown outward, and the push block 27 pulls the spring three 28 to extend until the push block 27 collides with the inclined block 31, and the push block 27 will squeeze and drive the inclined block 31 to rise, and the rise of the inclined block 31 drives the blocking plate 33 to rise, and the blocking plate 33 squeezes the spring four 32. At the same time, the rise of the blocking plate 33 increases the air inlet cross-sectional area inside the exhaust pipe 11, increases the extracted air volume, and thus keeps the air inlet plate 35 in an open state, reducing the situation where the fan blades 19 blow air and cause the air inlet plate 35 to close. Among them, the elastic coefficient of the spring three 28 is greater than the elastic coefficient of the spring four 32, which keeps the push block 27 able to smoothly drive the inclined block 31 to rise, thereby improving the waste heat recovery rate.

[0034] During use, the vacuum pump 12 draws air from the inside of the recovery box 10, causing the air inlet plate 35 to expand downward, and the air inlet plate 35 drives the connecting rod 39 to move downward, and the connecting rod 39 drives the sliding sleeve 38 to press down, and the sliding sleeve 38 squeezes the spring 5 40, and the spring 5 40 contracts under the force, thereby facilitating the opening of the air inlet plate 35 to let in air. At the same time, when the fan blades 19 blow air upward to the inside of the recovery box 10, it will drive the air inlet plate 35 to reset and swing upward to a certain angle, so that the blown hot air is temporarily stored at the bottom of the air inlet plate 35, thereby better contacting the spiral water pipe 13.

[0035] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] 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 scope of protection of the present invention.

Claims

1. A rotary kiln waste heat recovery device with a slow flow structure, comprising a bottom plate (1) and a side plate (2) symmetrically fixed to one side of the top of the bottom plate (1), wherein the inside of the side plate (2) is rotatably connected to a rotating rod (3), a rotary kiln body (4) is installed on the inner side of the two side plates (2), the rotary kiln body (4) is fixedly connected to the rotating rod (3), and a feed port (7) is installed at one end of the rotating rod (3); It is characterized by: Also includes: A protective cover (8) is installed on the outside of the rotary kiln body (4); An air inlet pipe (9) is connected to one side of the top of the protective cover (8); An exhaust pipe (11) is connected to a lower portion of one side of the recovery box (10); A slow flow component is arranged inside the recycling box (10), and the slow flow component includes a second motor (16). The second motor (16) is fixedly installed on the top of the recycling box (10). The output end of the second motor (16) passes through the recycling box (10) and is fixedly connected to a rotating shaft (17). The bottom end of the rotating shaft (17) is fixedly connected to the bottom plate (1). The outer side of the lower part of the rotating shaft (17) is fixedly connected to a mounting sleeve (18). The outer side of the mounting sleeve (18) is rotatably connected to a fan blade (19), and the fan blade (19) is arranged to be inclined. The top of the mounting sleeve (18) is fixedly connected to a mounting block (20), an inclined slot (21) is provided inside the mounting block (20), an inclined rod (22) is slidably connected inside the inclined slot (21), the inclined slot (21) and the inclined rod (22) are both arranged to be tilted downward, the bottom end of the inclined rod (22) abuts against the fan blade (19), a spring (23) is fixedly connected to one side of the interior of the inclined slot (21), and the spring (23) is fixedly connected to one end of the inclined slot (21).

2. The rotary kiln waste heat recovery device with a slow flow structure according to claim 1, characterized in that: A motor 1 (5) is fixedly mounted on one end of the top of the bottom plate (1), and the motor 1 (5) is located on a side of the rotary kiln body (4) away from the recovery box (10). A belt assembly (6) is mounted on the output end of the motor 1 (5), and the motor 1 (5) is adaptively connected to the rotating rod (3) through the belt assembly (6). A through hole is provided on a side of the protective cover (8) close to the feed port (7), and the protective cover (8) consists of two symmetrical parts, the inner ring diameter of the protective cover (8) being larger than the outer ring diameter of the rotary kiln body (4).

3. The rotary kiln waste heat recovery device with a slow flow structure according to claim 1, characterized in that: A recovery box (10) is fixedly connected to the other side of the top of the bottom plate (1), and the end of the air inlet pipe (9) away from the protective cover (8) is connected to the recovery box (10). An air pump (12) is installed in the middle of the exhaust pipe (11). A spiral water pipe (13) is fixedly installed in the middle of the recovery box (10), one end of the spiral water pipe (13) passes through the recovery box (10) and is connected to a water inlet (14), and the other end of the spiral water pipe (13) passes through the recovery box (10) and is connected to a drain (15), and the water inlet (14) and the drain (15) are both located outside the recovery box (10).

4. The rotary kiln waste heat recovery device with a slow flow structure according to claim 1, characterized in that: The lower outer portion of the mounting sleeve (18) is fixedly connected to a bottom block (24), one side of the fan blade (19) is fixedly connected to a top block (25), a spring 2 (26) is fixedly connected between the bottom block (24) and the top block (25), a push block (27) is slidably connected to the side of the fan blade (19) away from the mounting sleeve (18), one end of the push block (27) is fixedly connected to a spring 3 (28), the spring 3 (28) is located inside the fan blade (19), a groove (29) is provided on the side of the recovery box (10) close to the exhaust pipe (11), and the interior of the groove (29) is vertically fixed. A sliding rod (30) is fixedly connected, a blocking plate (33) is sleeved on the bottom of the sliding rod (30), an inclined block (31) is fixedly connected to one side of the blocking plate (33), and the inclined block (31) is arranged to be tilted upward. A spring four (32) is slidably connected to the outer side of the sliding rod (30), and the blocking plate (33) is slidably connected to the exhaust pipe (11). The fan blades (19) are arranged in an array, and the number of the fan blades (19) is not less than four. The number of the mounting blocks (20) matches the fan blades (19), and the side of the inclined block (31) close to the rotating shaft (17) is located outside the groove (29).

5. The rotary kiln waste heat recovery device with a slow flow structure according to claim 1, characterized in that: A blocking assembly is provided above the interior of the recovery box (10), the blocking assembly comprising a side shaft (34), the side shaft (34) being symmetrically fixed to the upper inner portion of the recovery box (10), the outer side of the side shaft (34) being rotatably connected to an air inlet plate (35), and the inner side wall of the recovery box (10) being fixedly connected to a fixing block (36).

6. The rotary kiln waste heat recovery device with a slow flow structure according to claim 5, characterized in that: The fixing blocks (36) are symmetrically arranged in an upper and lower manner. A fixing rod (37) is fixedly connected between the upper and lower fixing blocks (36). The outer side of the fixing rod (37) is slidably connected to a sliding sleeve (38). The bottom of the air inlet plate (35) is rotatably connected to a connecting rod (39). The end of the connecting rod (39) away from the air inlet plate (35) is rotatably connected to the sliding sleeve (38).

7. The rotary kiln waste heat recovery device with a slow flow structure according to claim 6, characterized in that: The outer side of the fixed rod (37) is sleeved with a spring five (40), the bottom end of the spring five (40) is fixedly connected to the lower fixed block (36), the top end of the spring five (40) is fixedly connected to the sliding sleeve (38), and the spring five (40) is slidably connected to the fixed rod (37).

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