Device for drying by utilizing waste heat of flue gas of kiln

Abstract

The utility model discloses a device utilizing kiln flue gas waste heat for drying, and relates to the technical field of boehmite drying, the device comprises a drying box and a box door hinged to one side of the drying box, a rotating shaft drives a stirring rod and a cam to rotate, so that the stirring rod stirs boehmite in the drying box, and the box door is hinged to one side of the drying box. Meanwhile, a cam rotates to move a connecting block, so that a drying frame swings in a reciprocating mode, the problem that at present, when boehmite is dried, no moving measures are taken for the boehmite is solved, and the working efficiency is improved advantageously; the flue gas heat exchanger is matched with the hot air ejector, and the bottom hole is formed in the bottom of the drying frame, so that waste heat of kiln flue gas can be utilized when boehmite is dried, and the top and the bottom of the boehmite can be synchronously dried; the boehmite drying device solves the problem that the inner bottom of the drying frame is not easy to dry when boehmite is dried, and the practical performance of the boehmite drying device is improved.

Description

Technical Field

[0001] This utility model relates to the field of boehm drying technology, specifically a device for drying using waste heat from kiln flue gas. Background Technology

[0002] Boehmite, also known as soft boehmite, requires a drying process that is crucial in its production. The quality of the drying directly affects the performance, quality, and production efficiency of the boehmite product.

[0003] 1. Currently, when drying boehmite, it is usually placed in a drying box, and there is a lack of measures to move the boehmite during the drying process. This results in a longer drying time and lower work efficiency when drying boehmite.

[0004] 2. Furthermore, the drying of boehmite is usually carried out by electric heating, which results in high operating costs. In addition, the bottom of the placement frame cannot be directly dried during heating, leading to poor performance of the boehmite drying device. Utility Model Content

[0005] To address the above problems, this utility model provides a device for drying using waste heat from kiln flue gas, thus solving the aforementioned issues.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for drying using waste heat from kiln flue gas, comprising a drying box and a door hinged to one side of the drying box, wherein a plurality of sliding grooves are provided on the inner side of the drying box, a sliding rod is provided inside the sliding groove, a spring is provided outside the sliding rod, and a slider is slidably connected to the outside of the sliding rod, and the slider is slidably connected to the sliding groove.

[0007] A connecting block is connected to one side of the slider, and a drying frame is connected to one side of the connecting block. Several bottom holes are opened at the bottom of the drying frame. Several hot air ejectors are connected inside the drying box, and the drying frame is positioned between two hot air ejectors.

[0008] The drying oven is internally connected to a rotating shaft, and two cams are fixedly connected to the outside of the rotating shaft. Several agitator rods are also fixedly connected to the outside of the rotating shaft.

[0009] Preferably, a flue gas heat exchanger is connected to the top of the drying oven, and a hot air duct is connected to one end of the flue gas heat exchanger.

[0010] Preferably, one side of the hot air duct is connected to several connecting pipes that penetrate the drying chamber, and one end of the connecting pipe is connected to one side of the hot air ejector.

[0011] Preferably, one end of the flue gas heat exchanger is connected to an air inlet pipe, one side of the flue gas heat exchanger is connected to a flue gas inlet, and one end of the flue gas heat exchanger is connected to a waste smoke discharge pipe.

[0012] Preferably, a motor is connected to one side of the drying oven, and the output end of the motor is connected to one end of the rotating shaft for transmission.

[0013] Preferably, one end of the cam abuts against one side of the connecting block when it rotates.

[0014] Preferably, one side of the drying frame is connected to a hinged plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This application uses a rotating shaft to drive the stirring rod and cam to rotate, so that the stirring rod stirs the boehm stone in the drying box. At the same time, the rotation of the cam moves the connecting block, causing the drying frame to swing back and forth, which improves the drying efficiency of boehm stone and solves the problem that there is no way to move the boehm stone when drying it. This is conducive to improving work efficiency.

[0017] 2. This application utilizes a flue gas heat exchanger in conjunction with a hot air ejector and a bottom hole at the bottom of the drying frame to utilize the waste heat of the kiln flue gas during boehm drying, eliminating the need for electric heating. Furthermore, it allows for simultaneous drying of the top and bottom of the boehm, solving the problems of the need for electric heating during boehm drying and the difficulty in drying the inner bottom of the drying frame. This improves the practical performance of the boehm drying device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the drying frame structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of region A of this utility model;

[0022] Figure 5 This is a schematic diagram of the slide groove structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the flue gas heat exchange of this utility model.

[0024] The diagram shows the following components: 1. Drying oven; 2. Oven door; 3. Slide rail; 4. Slide rod; 5. Spring; 6. Sliding block; 7. Connecting block; 8. Drying frame; 9. Bottom hole; 10. Opening plate; 11. Motor; 12. Rotating shaft; 13. Cam; 14. Stirring rod; 15. Flue gas heat exchanger; 16. Hot air duct; 17. Connecting pipe; 18. Hot air ejector; 19. Air inlet pipe; 20. Flue gas inlet; 21. Waste smoke discharge pipe. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0026] Please see Figures 1 to 6 A device for drying using waste heat from kiln flue gas includes a drying box 1 and a door 2 hinged to one side of the drying box 1. Personnel can place boehm stones inside the drying frame 8 or take out the dried boehm stones by opening the door 2 and the opening and closing plate 10. Several sliding grooves 3 are provided on the inner side of the drying box 1. A sliding rod 4 is provided inside the sliding groove 3. A spring 5 is provided outside the sliding rod 4. A slider 6 is slidably connected to the outside of the sliding rod 4. The slider 6 is slidably connected to the sliding groove 3. When the slider 6 slides, it will move outside the sliding rod 4 and inside the sliding groove 3. When the slider 6 moves, it will squeeze or stretch the spring 5, so that the spring 5 can use its own characteristics to drive the slider 6 to return to its original position.

[0027] A connecting block 7 is connected to one side of the slider 6, and a drying frame 8 is connected to one side of the connecting block 7. Several bottom holes 9 are opened at the bottom of the drying frame 8. Several hot air ejectors 18 are connected inside the drying box 1, and the drying frame 8 is located between two hot air ejectors 18.

[0028] The drying chamber 1 is rotatably connected to a rotating shaft 12. Two cams 13 are fixedly connected to the outside of the rotating shaft 12. Several stirring rods 14 are fixedly connected to the outside of the rotating shaft 12. When drying the boehm inside the drying frame 8, the output end of the motor 11 drives the rotating shaft 12 to rotate. When the rotating shaft 12 rotates, it not only drives the stirring rods 14 to rotate, but also stirs the boehm inside the drying frame 8, improving the mobility of the boehm.

[0029] Furthermore, it will also drive the cam 13 to rotate. When the cam 13 rotates, the protrusion of the cam 13 will abut against the connecting block 7. As the cam 13 continues to rotate, the connecting block 7 will move due to the influence of the protrusion of the cam 13.

[0030] Furthermore, when the connecting block 7 moves, it will cause the slider 6 to slide outside the slide rod 4. At the same time, the connecting block 7 will also cause the drying frame 8 to move. Then, the cam 13 will continue to rotate and contact the connecting block 7 on the other side. Similarly, at this time, the connecting block 7 on the other side will cause the drying frame 8 to move to the other side, thereby realizing the reciprocating swing of the drying frame 8. This will further improve the mobility of the boehm inside the drying frame 8, so that the boehm inside the drying frame 8 can be fully dried, which is beneficial to improving the drying efficiency of the boehm.

[0031] It is important to note that when the cam 13 is not in contact with the connecting blocks 7 on both sides, the slider 6 will be affected by the spring 5 to reset, causing the slider 6 to move and reset the connecting blocks 7 and the drying frame 8, thereby achieving the positioning of the drying frame 8 and keeping it in a relatively stable position.

[0032] The top of the drying oven 1 is connected to a flue gas heat exchanger 15, and one end of the flue gas heat exchanger 15 is connected to a hot air pipe 16. The flue gas generated by the kiln operation will enter the interior of the flue gas heat exchanger 15 through the flue gas inlet 20. At the same time, the outside air will enter the interior of the flue gas heat exchanger 15 through the air inlet pipe 19. When the two enter the interior of the flue gas heat exchanger 15, the residual heat in the flue gas generated by the kiln operation will be transferred to the incoming air through the flue gas heat exchanger 15, so that the incoming air will be heated and the flue gas will be cooled. Then the cooled flue gas will be discharged through the waste smoke discharge pipe 21, while the heated air will be transported through the hot air pipe 16 to the connecting pipe 17, and then to the hot air ejector 18 for its use.

[0033] It should be further explained that the flue gas heat exchanger 15 is a known technology. The flue gas entering the heat exchanger flows in the heat exchange tubes, while the other tube usually contains a cooling medium (external air). Due to the temperature difference between the flue gas and the medium inside the tubes, according to the principle of heat conduction, heat will be transferred from the high-temperature flue gas to the low-temperature medium inside the tubes. Specifically, the heat is first transferred to the tube wall through convective heat exchange between the flue gas and the tube wall; then, the heat is transferred from the outside of the tube wall to the other tube wall through heat conduction; finally, the heat is transferred to the medium inside the tubes through convective heat exchange between the medium inside the tubes and the tube wall. Those skilled in the art can and should understand its specific functions and structure, so it will not be described in detail here.

[0034] It should be noted that a blower is provided on one side of the air inlet pipe 19 and an exhaust fan is provided on one side of the waste smoke discharge pipe 21, so that the gas can circulate normally. At the same time, the air inlet pipe 19, the flue gas inlet 20, and the waste smoke discharge pipe 21 are all connected to external equipment. Since those skilled in the art can and should understand the specific functions and structures of the external equipment, they will not be described in detail here.

[0035] A number of connecting pipes 17 that penetrate the drying chamber 1 are connected to one side of the hot air pipe 16. One end of the connecting pipe 17 is connected to one side of the hot air ejector 18. The hot air ejector 18 is equipped with a fan. The fan, in conjunction with the nozzle on one side of the hot air ejector 18, can accelerate the hot air flow speed, so that the hot air can be blown toward the boehm inside the drying frame 8 to dry it.

[0036] It should be noted that the drying frame 8, through the bottom hole 9, allows the hot air ejector 18 below the drying frame 8 to dry the bottom inside of the drying frame 8, while the hot air ejector 18 above the drying frame 8 can dry the top part of the drying frame 8. This allows for the comprehensive drying of the boehm inside the drying frame 8, avoiding the problem that traditional boehm drying requires electric heating and cannot dry the bottom inside the drying frame 8 with hot air.

[0037] One end of the flue gas heat exchanger 15 is connected to an air inlet pipe 19, one side of the flue gas heat exchanger 15 is connected to a flue gas inlet 20, and one end of the flue gas heat exchanger 15 is connected to a waste smoke discharge pipe 21.

[0038] A motor 11 is connected to one side of the drying oven 1, and the output end of the motor 11 is connected to one end of the rotating shaft 12 for transmission.

[0039] When the cam 13 rotates, one end will abut against one side of the connecting block 7.

[0040] A hinged plate 10 is connected to one side of the drying frame 8.

[0041] When using this utility model:

[0042] First, personnel can place the boehmstone inside the drying frame 8 or remove the dried boehmstone by opening the box door 2 and the opening and closing plate 10. The flue gas generated by the kiln operation will enter the flue gas heat exchanger 15 through the flue gas inlet 20. At the same time, the outside air will enter the flue gas heat exchanger 15 through the air inlet pipe 19. When the two enter the flue gas heat exchanger 15, the residual heat in the flue gas generated by the kiln operation will be transferred to the incoming air through the flue gas heat exchanger 15, so that the incoming air will be heated and the flue gas will be cooled. Then the cooled flue gas will be discharged through the waste smoke discharge pipe 21, while the heated air will be transported to the connecting pipe 17 through the hot air pipe 16, and then to the hot air ejector 18 for its use.

[0043] Secondly, the hot air ejector 18 below the drying frame 8 can dry the bottom of the drying frame 8 through the bottom hole 9, while the hot air ejector 18 above the drying frame 8 can dry the upper part of the drying frame 8, thereby allowing the boehm inside the drying frame 8 to be thoroughly dried.

[0044] Then, when drying the boehm inside the drying frame 8, the output end of the motor 11 drives the rotating shaft 12 to rotate. When the rotating shaft 12 rotates, it not only drives the stirring rod 14 to rotate and stir the boehm inside the drying frame 8, but also drives the cam 13 to rotate. When the cam 13 rotates, the protrusion of the cam 13 will abut against the connecting block 7, and as the cam 13 continues to rotate, the connecting block 7 will move due to the influence of the protrusion of the cam 13.

[0045] Finally, when the connecting block 7 moves, it will cause the slider 6 to slide outside the slide rod 4. At the same time, the connecting block 7 will also cause the drying frame 8 to move. Then, the cam 13 will continue to rotate and contact the connecting block 7 on the other side. Similarly, at this time, the connecting block 7 on the other side will cause the drying frame 8 to move to the other side, thereby realizing the reciprocating swing of the drying frame 8. This will further improve the mobility of the boehm inside the drying frame 8, so that the boehm inside the drying frame 8 can be fully dried, which is beneficial to improving the drying efficiency of the boehm.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for drying using waste heat from kiln flue gas, comprising a drying chamber (1) and a door (2) hinged to one side of the drying chamber (1), characterized in that: The drying oven (1) has several sliding grooves (3) on its inner side. The sliding groove (3) has a sliding rod (4) inside. The sliding rod (4) has a spring (5) outside. The sliding rod (4) is slidably connected to a slider (6) outside. The slider (6) is slidably connected to the sliding groove (3). A connecting block (7) is connected to one side of the slider (6), and a drying frame (8) is connected to one side of the connecting block (7). Several bottom holes (9) are opened at the bottom of the drying frame (8). Several hot air ejectors (18) are connected inside the drying box (1). The drying frame (8) is located between two hot air ejectors (18). The drying oven (1) is rotatably connected to a rotating shaft (12), and two cams (13) are fixedly connected to the outside of the rotating shaft (12). Several stirring rods (14) are fixedly connected to the outside of the rotating shaft (12).

2. The apparatus for drying using waste heat from kiln flue gas according to claim 1, characterized in that: The top of the drying oven (1) is connected to a flue gas heat exchanger (15), and one end of the flue gas heat exchanger (15) is connected to a hot air pipe (16).

3. The apparatus for drying using waste heat from kiln flue gas according to claim 2, characterized in that: One side of the hot air pipe (16) is connected to several connecting pipes (17) that penetrate the drying box (1), and one end of the connecting pipe (17) is connected to one side of the hot air ejector (18).

4. The apparatus for drying using waste heat from kiln flue gas according to claim 2, characterized in that: One end of the flue gas heat exchanger (15) is connected to an air inlet pipe (19), one side of the flue gas heat exchanger (15) is connected to a flue gas inlet (20), and one end of the flue gas heat exchanger (15) is connected to a waste smoke discharge pipe (21).

5. The apparatus for drying using waste heat from kiln flue gas according to claim 1, characterized in that: A motor (11) is connected to one side of the drying box (1), and the output end of the motor (11) is connected to one end of the rotating shaft (12) for transmission.

6. The apparatus for drying using waste heat from kiln flue gas according to claim 1, characterized in that: One end of the cam (13) will abut against one side of the connecting block (7) when it rotates.

7. The apparatus for drying using waste heat from kiln flue gas according to claim 1, characterized in that: One side of the drying frame (8) is connected to a hinged plate (10).

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