Drying device for recovering cooling waste heat of rotary kiln

Abstract

The utility model belongs to the technical field of rotary kilns, and discloses a drying device for recovering cooling waste heat of a rotary kiln. Comprising a rotary kiln, a cooling kiln, a dust removal cylinder, a filter box, a filter plate and a vibration assembly, an exhaust pipe is installed at the top of the dust removal cylinder, baffles are symmetrically installed at the top in the filter box, one end in the filter box is slidably connected with a filter membrane, and one end of the filter membrane is slidably connected with a water scraping assembly. Heat in waste gas and heat generated during cooling in the cooling kiln are fed into the cavity of the rotary kiln, the heat preservation effect of the rotary kiln is improved, impurities and water in the waste gas are removed through the filter plate and the filter membrane, the fixing plate, the motor, the belt pulley, the belt, the vibration assembly and the water scraping assembly are additionally arranged, and the heat preservation effect of the rotary kiln is improved. Water drops on the filter membrane are cleaned through the water scraping assembly, the water removal efficiency of the filter membrane is guaranteed, the filter plate is knocked through the vibration assembly, the filter plate is prevented from being blocked, and the waste gas treatment efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, and more specifically, to a drying device for recovering residual heat from cooling a rotary kiln. Background Art

[0002] The rotary kiln equipment is a steel thin-walled cylinder with a slope of 3 to 3.5% installed on a supporting device. Due to the inclined installation of the cylinder, the material in the kiln flips along the circumference and moves along the axial direction, thus slowly flowing through the entire cylinder, and after complex physical and chemical changes, it completes the dehydration and decarbonization process, and is discharged from its lower end (also known as the tail end of the kiln) and enters the cooling system, while the fuel is sprayed from its lower end into the high-temperature area of ​​the kiln for combustion. Under the action of natural or mechanical ventilation at the kiln head, the hot flue gas and the material flow through the entire kiln in the opposite direction, and are discharged into the atmosphere through the chimney after dust collection.

[0003] When the existing rotary kiln is in use, the waste gas in the recovery kiln needs to be further filtered, and the materials in the waste gas are filtered and recovered through the filter plate. The filter plate is prone to clogging after long-term use, affecting the filtering effect. The heat in the waste gas entering the cooling kiln and the recovery kiln of the rotary kiln is not utilized, which easily causes a waste of resources. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model proposes a drying device for recovering the waste heat of the rotary kiln cooling.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drying device for recovering waste heat from cooling a rotary kiln, comprising a rotary kiln, a cooling kiln, a dust removal cylinder and a filter box, a filter plate is installed at the upper end of the dust removal cylinder, a vibration assembly is provided on the top of the filter plate, an exhaust pipe is installed on the top of the dust removal cylinder, a baffle is symmetrically installed on the top of the filter box, a filter membrane is slidably connected to one end of the filter box, and a wiper assembly is slidably connected to one end of the filter membrane;

[0006] A fixed plate is installed on the top of the dust removal cylinder, and pulleys are rotatably installed on the top and bottom of one end of the fixed plate. A motor is installed on the top of the other end of the fixed plate, and the output end of the motor is fixedly connected to the top pulley. The outer tension sleeves of the top and bottom pulleys are provided with belts;

[0007] The wiper assembly includes a connecting rod, a connecting hole slidably connected to the connecting rod is opened at the bottom of the filter box, a scraper slidably connected to the filter membrane is installed on the top of the connecting rod, and the lower end of the connecting rod extending out of the bottom of the filter box is hinged with a transmission rod 1, and a connecting block is rotatably installed at one end of the transmission rod away from the connecting rod, and the connecting block is fixedly connected to one end of the belt.

[0008] Furthermore, a cavity is provided inside the rotary kiln and the cooling kiln, a discharge pipe is connected to the bottom of the rotary kiln and the top of the cooling kiln, an air outlet pipe is connected to the top of the rotary kiln and the upper end of the dust removal cylinder, a discharge pipe is connected to the bottom of the dust removal cylinder and the top of the cooling kiln, a connecting pipe is connected to one end of the rotary kiln and the cooling kiln, a recovery pipe is connected to one end of the filter box and the top of the rotary kiln, and the recovery pipe and the connecting pipe are both in conduction with the cavity.

[0009] Furthermore, a mounting hole matching the size of the exhaust pipe is provided at the bottom of the filter box, the upper end of the exhaust pipe extends into the filter box portion, and the baffle is symmetrically arranged in an eight-shaped shape at the upper end of the exhaust pipe.

[0010] Furthermore, a water storage tank is installed at the bottom of the filter box, and a drainage hole is provided on the side where the water storage tank and the filter box are in contact. The drainage hole is located at the bottom of one end of the filter membrane. A guide plate is also installed at the bottom of the filter box, and a limiting groove is provided on the top of the guide plate for sliding connection with a connecting rod. The top of the filter box is provided with a socket for sliding connection with the filter membrane.

[0011] Furthermore, the vibration component includes a transmission rod 2 and a slide plate. The transmission rod 2 is rotatably installed at the bottom of the other end of the fixed plate. One end of the transmission rod 2 is fixedly connected to the bottom pulley. The other end of the transmission rod 2 away from the pulley is rotatably installed with a slide plate. One end of the slide plate is provided with a sliding hole slidably connected to the slide plate.

[0012] Furthermore, a fixing rod is installed at the bottom of the slide plate, a through hole slidably connected to the fixing rod is opened at the top of the dust removal cylinder, and a knocking block is installed at the bottom end of the fixing rod extending into the dust removal cylinder, and the bottom of the knocking block is in extrusion contact with the top of the filter plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the heat in the exhaust gas and the heat generated during cooling in the cooling kiln are sent into the cavity of the rotary kiln, thereby improving the thermal insulation effect of the rotary kiln; impurities and water in the exhaust gas are removed by the filter plate and the filter membrane; a fixed plate, a motor, a pulley, a belt, a vibration component and a wiper component are added; the water droplets on the filter membrane are cleaned by the wiper component to ensure the water removal efficiency of the filter membrane; the filter plate is knocked with the vibration component to prevent the filter plate from being blocked, thereby further improving the treatment efficiency of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a cross-sectional view of the internal structure of the dust removal cylinder, filter box and water storage tank of the utility model;

[0016] Figure 3 It is a schematic diagram of the wiper assembly of the utility model;

[0017] Figure 4 It is a schematic diagram of the vibration component of the utility model.

[0018] In the figure:

[0019] 1. Rotary kiln; 2. Discharge pipe; 3. Cooling kiln; 4. Exhaust pipe; 5. Dust removal cylinder; 6. Discharge pipe; 7. Exhaust pipe; 8. Filter box; 9. Connecting pipe; 10. Recovery pipe; 11. Filter plate; 12. Baffle; 13. Filter membrane; 14. Water storage tank; 15. Fixed plate; 16. Scraper; 17. Connecting rod; 18. Motor; 19. Pulley; 20. Belt; 21. Transmission rod 1; 2101. Connecting block; 22. Transmission rod 2; 23. Slider; 24. Slide plate; 25. Fixed rod; 26. Knocking block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4The utility model provides the following technical solutions: a drying device for recovering waste heat from cooling a rotary kiln, comprising a rotary kiln 1, a cooling kiln 3, a dust removal barrel 5 and a filter box 8. In specific implementation, the cooling kiln 3 can adopt a screw conveyor. The screw conveyor is a machine that uses a motor to drive a screw to rotate and push materials to achieve the purpose of transportation. The screw conveyor is an existing structure, so it is not described in detail. A filter plate 11 is installed at the upper end of the dust removal barrel 5. A vibration component is provided on the top of the filter plate 11. By knocking the filter plate 11 with the vibration component, it can avoid that the material in the exhaust gas blocks the filter plate 11, thereby improving the filtering effect of the filter plate 11. The vibration component comprises a transmission rod 22 and a slide plate 24. The transmission rod 22 is rotatably installed at the bottom of the other end of the fixed plate 15. One end of the transmission rod 22 is fixedly connected to the bottom pulley 19. When the pulley 19 rotates, the synchronous rotation of the transmission rod 22 is realized. The other end of the transmission rod 22 away from the pulley 19 is rotatably installed with a slider 23. One end of the slide plate 24 is provided with a sliding hole slidably connected to the slider 23. The slider 23 is cylindrical. When the slider 23 slides in the sliding hole of the slide plate 24, it drives the slide plate 24 to move up and down. A fixing rod 25 is installed at the bottom of the slide plate 24. A through hole slidably connected to the fixing rod 25 is opened at the top of the dust removal cylinder 5. The through hole increases the stability of the linear sliding of the fixing rod 25. The fixing rod 25 extends into the bottom end of the dust removal cylinder 5 and is installed with a knocking block 26. The bottom of the knocking block 26 is in extrusion contact with the top of the filter plate 11. The knocking block 26 is made of rubber, which reduces the wear between the fixing rod 25 and the filter plate 11. The knocking block 26 is larger than the through hole and plays a role in limiting the fixing rod 25.

[0022] An exhaust pipe 7 is installed on the top of the dust collector 5, and a mounting hole matching the size of the exhaust pipe 7 is opened at the bottom of the filter box 8. The upper end of the exhaust pipe 7 extends into the filter box 8. For the additional description of the exhaust pipe 7, to prevent the water inside the filter box 8 from flowing back into the exhaust pipe 7, a baffle 12 is symmetrically installed on the top of the filter box 8. The baffle 12 is symmetrically arranged in an eight-shaped shape at the upper end of the exhaust pipe 7. For the description of the baffle 12, water in the exhaust gas condenses at the bottom of the baffle 12 to form distilled water. The baffle 12 prevents water droplets on the top of the filter box 8 from dripping into the exhaust pipe 7. A filter membrane 13 is slidably connected to one end of the filter box 8, and the filter membrane 13 further removes water.

[0023] The bottom of the rotary kiln 1 and the top of the cooling kiln 3 are connected with a discharge pipe 2, which is in communication with the interior of the rotary kiln 1 and the cooling kiln 3. The top of the rotary kiln 1 and the upper end of the dust removal tube 5 are connected with an air outlet pipe 4, which is in communication with the interior of the rotary kiln 1 and the dust removal tube 5. One end of the air outlet pipe 4 that is in contact with the dust removal tube 5 is located at the bottom of the filter plate 11. The bottom of the dust removal tube 5 and the top of the cooling kiln 3 are connected with a discharge pipe 6, which is in communication with the interior of the dust removal tube 5 and the cooling kiln 3. One end of the rotary kiln 1 and the cooling kiln 3 is connected with a connecting pipe 9, one end of the filter box 8 and the top of the rotary kiln 1 are connected with a recovery pipe 10, and cavities are provided in the interiors of the rotary kiln 1 and the cooling kiln 3, and the recovery pipe 10 and the connecting pipe 9 are both in communication with the cavity.

[0024] A fixed plate 15 is installed on the top of the dust removal cylinder 5, and pulleys 19 are rotatably installed on the top and bottom of one end of the fixed plate 15. A motor 18 is installed on the top of the other end of the fixed plate 15. The motor 18 is electrically connected to an external power switch, and the output end of the motor 18 is fixedly connected to the top pulley 19. The outer tensioning sleeves of the top and bottom pulleys 19 are provided with belts 20, and the motor 18 drives the pulleys 19 and the belts 20 to rotate.

[0025] One end of the filter membrane 13 is slidably connected to a wiper assembly, which includes a connecting rod 17. A connecting hole slidably connected to the connecting rod 17 is provided at the bottom of the filter box 8, and the connecting hole serves to increase the linear sliding stability of the connecting rod 17. A scraper 16 slidably connected to the filter membrane 13 is installed on the top of the connecting rod 17. The lower end of the connecting rod 17 extending out of the bottom of the filter box 8 is hinged with a transmission rod 21, and a connecting block 2101 is rotatably installed at one end of the transmission rod 21 away from the connecting rod 17. The connecting block 2101 is fixedly connected to one end of the belt 20, and the extended line of the contact position between the connecting rod 17 and the connecting block 2101 coincides with the center point of the pulley 19. A guide plate is also installed at the bottom of the filter box 8, and a limiting groove slidably connected to the connecting rod 17 is provided on the top of the guide plate. The limiting groove serves to limit the connecting rod 17. A water storage The water droplets on the filter membrane 13 and the water droplets in the filter box 8 enter the water tank 14 for centralized storage through the drainage hole. The top of the filter box 8 is provided with a socket slidably connected to the filter membrane 13. The socket is convenient for the user to slide the filter membrane 13 upward for replacement. An outlet pipe is provided at the bottom of one end of the water tank 14, and an inlet pipe is provided at the top of the cooling kiln 3. Valves are installed on the inlet and outlet pipes. An observation hole is provided on one side of the water tank 14. Transparent glass is embedded in the observation hole for observing the water level inside the water tank 14. The outlet pipe, the cooling kiln 3 and the inlet pipe are connected through an external water pipe, so that the water in the water tank 14 enters the cavity of the cooling kiln 3, which can be used to reduce the surface temperature of the cooling kiln 3 and improve the cooling effect of the cooling kiln 3.

[0026] Working principle: After the reaction, the material inside the rotary kiln 1 enters the cooling kiln 3 through the discharge pipe 2, and the exhaust gas enters the dust removal tube 5 through the exhaust pipe 4. After being filtered by the filter plate 11, the material filtered out at the bottom of the filter plate 11 falls from the discharge pipe 6 to the cooling kiln 3 due to gravity. The material is transported by the cooling kiln 3, and the heat in the material is dissipated during the transportation process. The cooled material is discharged through the discharge port at the bottom of the cooling kiln 3. The exhaust gas filtered in the dust removal tube 5 enters the filter box 8 through the exhaust pipe 7. After being filtered by the filter membrane 13, the exhaust gas enters the cavity of the rotary kiln 1 through the recovery pipe 10. The water in the exhaust gas condenses at the bottom of the baffle 12 and drips on the bottom of the filter box 8. After being filtered by the filter membrane 13, the exhaust gas enters the cavity of the rotary kiln 1 through the recovery pipe 10. At the same time, the hot air from the cooling of the material in the cooling kiln 3 enters the interior of the rotary kiln 1 through the connecting pipe 9, thereby realizing heat recovery. The motor 18 is started, and the motor 18 drives the top pulley 19 to rotate. The top pulley 19 drives the bottom pulley 19 through the belt 20. The pulley 19 rotates, and the belt 20 drives the connecting rod 17 to slide up and down through the connecting block 2101 and the transmission rod 1 21. The connecting rod 17 drives the scraper 16 to clean the water droplets on the filter membrane 13, so that the water droplets drip on the bottom of the filter box 8. The collected water droplets enter the water storage tank 14 through the drainage hole for centralized storage. When the pulley 19 at the bottom rotates, the transmission rod 22 is driven to rotate, and the transmission rod 22 drives the slider 23 to rotate. The slider 23 slides in the sliding hole of the slide plate 24, driving the slide plate 24 to move up and down. The sliding plate 24 drives the fixing rod 25 and the knocking block 26 to move up and down, and the knocking block 26 vibrates and knocks the filter plate 11 to avoid clogging of the filter plate 11 and improve the filtering effect of the filter plate 11. When the water inside the water storage tank 14 accumulates to a certain extent, the water outlet pipe at one end of the water storage tank 14 is connected to the water inlet pipe at the top of the cooling kiln 3 through an external water pipe, and the valve on the water outlet pipe is opened to allow the water in the water storage tank 14 to enter the cavity of the cooling kiln 3, which can be used to reduce the surface temperature of the cooling kiln 3 and improve the cooling effect of the cooling kiln 3.

[0027] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0028] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A drying device for recovering waste heat from cooling a rotary kiln, comprising a rotary kiln (1), a cooling kiln (3), a dust removal cylinder (5) and a filter box (8), characterized in that: A filter plate (11) is installed at the upper end of the dust removal cylinder (5), a vibration assembly is provided at the top of the filter plate (11), an exhaust pipe (7) is installed at the top of the dust removal cylinder (5), a baffle (12) is symmetrically installed at the top of the filter box (8), a filter membrane (13) is slidably connected to one end of the filter box (8), and a wiper assembly is slidably connected to one end of the filter membrane (13); A fixed plate (15) is installed on the top of the dust removal cylinder (5), and pulleys (19) are rotatably installed on the top and bottom of one end of the fixed plate (15), and a motor (18) is installed on the top of the other end of the fixed plate (15), and the output end of the motor (18) is fixedly connected to the top pulley (19), and the outer tension sleeves of the top and bottom pulleys (19) are provided with belts (20); The wiper assembly comprises a connecting rod (17), a connecting hole slidably connected to the connecting rod (17) is provided at the bottom of the filter box (8), a scraper (16) slidably connected to the filter membrane (13) is installed on the top of the connecting rod (17), the lower end of the connecting rod (17) extending out of the bottom of the filter box (8) is hinged with a transmission rod (21), and a connecting block (2101) is rotatably installed at one end of the transmission rod (21) away from the connecting rod (17), and the connecting block (2101) is fixedly connected to one end of the belt (20).

2. A drying device for recovering waste heat from cooling of a rotary kiln according to claim 1, characterized in that: The rotary kiln (1) and the cooling kiln (3) are both provided with cavities inside, the bottom of the rotary kiln (1) and the top of the cooling kiln (3) are connected to a discharge pipe (2), the top of the rotary kiln (1) and the upper end of the dust removal cylinder (5) are connected to an air outlet pipe (4), the bottom of the dust removal cylinder (5) and the top of the cooling kiln (3) are connected to a discharge pipe (6), one end of the rotary kiln (1) and the cooling kiln (3) are connected to a connecting pipe (9), one end of the filter box (8) and the top of the rotary kiln (1) are connected to a recovery pipe (10), and the recovery pipe (10) and the connecting pipe (9) are both in conduction with the cavity.

3. A drying device for recovering waste heat from cooling of a rotary kiln according to claim 1, characterized in that: The bottom of the filter box (8) is provided with a mounting hole matching the size of the exhaust pipe (7), the upper end of the exhaust pipe (7) extends into the filter box (8), and the baffle (12) is symmetrically arranged in an eight-shaped shape at the upper end of the exhaust pipe (7).

4. A drying device for recovering waste heat from cooling of a rotary kiln according to claim 3, characterized in that: A water storage box (14) is installed at the bottom of the filter box (8), and a drainage hole is provided on the side where the water storage box (14) and the filter box (8) are in contact. The drainage hole is located at the bottom of one end of the filter membrane (13). A guide plate is also installed at the bottom of the filter box (8), and a limit groove is provided at the top of the guide plate, which is slidably connected to the connecting rod (17). The top of the filter box (8) is provided with a socket, which is slidably connected to the filter membrane (13).

5. A drying device for recovering waste heat from cooling of a rotary kiln according to claim 1, characterized in that: The vibration component comprises a second transmission rod (22) and a slide plate (24); the second transmission rod (22) is rotatably mounted on the bottom of the other end of the fixed plate (15); one end of the second transmission rod (22) is fixedly connected to the bottom pulley (19); the other end of the second transmission rod (22) away from the pulley (19) is rotatably mounted with a slide block (23); one end of the slide plate (24) is provided with a sliding hole slidably connected to the slide block (23).

6. A drying device for recovering waste heat from cooling of a rotary kiln according to claim 5, characterized in that: A fixing rod (25) is installed at the bottom of the slide plate (24), a through hole slidably connected to the fixing rod (25) is opened at the top of the dust removal cylinder (5), a knocking block (26) is installed at the bottom end of the fixing rod (25) extending into the dust removal cylinder (5), and the bottom of the knocking block (26) is in extrusion contact with the top of the filter plate (11).

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