A rotary short kiln

Abstract

The utility model discloses a kind of rotary short kiln, including pedestal, rotary kiln body and fixed platform, one-way conveying component is by frequency conversion motor, hard tooth surface four-stage cylindrical gear reducer, pinion and the large gear ring combination of being fixed in the right end outside of pedestal, the outside of rotary kiln body is equipped with cover, and the upper end of cover is provided with the adsorption mechanism for filtering and then purifying the dust of feed and the flue gas of discharge. The rotary short kiln, the supporting wheel, wheel belt, gear and other components in the equipment are changed from casting to forge, reduce maintenance cost, improve equipment operation rate, save cost and time, improve equipment operation rate, whole driving and braking are relatively convenient, can stably drive rotary kiln drawer to rotate, and by rotary kiln body feeding, feeding inlet is relatively convenient to discharge outward, in combination with the setting of adsorption mechanism, the dust generated when feeding and the flue gas when discharging can be adsorbed and purified, prevent pollution to environment.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary kilns, specifically a short rotary kiln. Background Technology

[0002] A rotary kiln is a cylindrical industrial device that can be placed horizontally or at an incline. The function of a rotary kiln is to treat solid materials at high temperatures through rotational motion, thereby realizing processes such as calcination, drying, and chemical reactions. It is mainly used for high-temperature treatment and material conversion.

[0003] As disclosed in announcement number CN220649035U, a rotary kiln is described. The rotary kiln includes a kiln body, a kiln tail installed on one side of the kiln body, an expansion joint fixedly installed on the outer wall of one side of the kiln tail, a first flange fixedly installed on one side of the expansion joint, and a dynamic sealing structure and an inclination adjustment mechanism provided on the kiln body. The dynamic sealing structure includes a second flange, a connecting piece, a sealing rotating ring, a sealing fixing ring, a sealing groove, a protrusion, a mounting groove, a pressure ring, and a fish-scale pattern with a labyrinth. The second flange and the first flange are connected by bolts. The connecting piece is fixedly installed on the second flange, the sealing rotating ring is fixedly installed on the connecting piece, and the sealing fixing ring is fixedly sleeved on the kiln body, with the sealing fixing ring and the sealing rotating ring being compatible. This rotary kiln provides the advantage of simple and effective adjustment of the kiln body's inclination angle, making it suitable for different materials.

[0004] However, existing technologies suffer from problems such as poor stability of the rotary kiln body drive, inconvenient feeding and discharging operations, and environmental pollution caused by the dust from the feed and the flue gas from the discharge. It is also inconvenient to treat the dust and flue gas. External components make maintenance and modification of the pipelines, rotary kiln body and transmission inconvenient. Replacing parts requires disassembling the cover and pipelines, which takes a long time and is very expensive. For example, the comparative patents listed above have this problem.

[0005] To address these issues, we propose a rotary short kiln. Utility Model Content

[0006] The purpose of this utility model is to provide a short rotary kiln to solve the problems mentioned in the background art, such as poor stability of the rotary kiln body drive, inconvenience of feeding and discharging operations, pollution of the environment by the dust from the feed and the flue gas from the discharge, inconvenience in the treatment of dust and flue gas, inconvenience of maintenance and modification of the pipeline, rotary kiln body and transmission by external components, and the need to disassemble the cover and pipeline to replace the parts, which is time-consuming and costly.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rotary short kiln, comprising a base, a rotary kiln body, and a fixed base;

[0008] Also includes:

[0009] The unidirectional conveying assembly consists of a variable frequency motor, a hardened four-stage cylindrical gear reducer, a pinion, and a large gear ring fixed on the outer side of the right end of the base. The rotary kiln body has drag wheels attached to both the front and rear sides of the lower end.

[0010] The rotary kiln body is fitted with a cover, and the upper end of the cover is provided with an adsorption mechanism for filtering and purifying the dust in the feed and the flue gas in the discharge. The adsorption mechanism includes a filter purification box fixed to the upper end of the cover and an activated carbon filter purification screen inserted into the middle of the filter purification box. The upper end of the filter purification box is connected to an external exhaust fan through a pipe.

[0011] As a preferred technical solution of this utility model, the upper end of the base is provided with a secondary casting layer, and both the left and right sides of the upper end of the base are rotatably connected to towing wheels.

[0012] By adopting the above technical solution, a secondary pouring layer is provided at the upper end of the base, and trolleys are rotatably connected to both the left and right sides of the upper end of the base. The trolleys are fitted to the rotary kiln body and rotate relative to each other, which can support the rotary kiln body and improve the stability of the rotary kiln body during rotation.

[0013] As a preferred technical solution of this utility model, a feed inlet is fixedly connected to the middle of the upper end of the rotary kiln body, and a discharge port is fixedly connected to the middle of the lower end of the rotary kiln body. At the same time, a refractory lining is provided on the inner side of the rotary kiln body.

[0014] The above technical solution involves a feed inlet fixedly connected to the middle of the upper end of the rotary kiln body, and a discharge port fixedly connected to the middle of the lower end of the rotary kiln body. At the same time, a refractory lining is provided on the inner side of the rotary kiln body. Material is fed through the feed inlet and discharged through the discharge port.

[0015] As a preferred technical solution of this utility model, the feed port is connected to an external feeding system, and the feeding system adopts a fully sealed tubular feeding system, and the discharge port is equipped with a high-temperature resistant, oxidation-resistant, and wear-resistant discharge port plate.

[0016] The above technical solution connects the feed inlet to an external feeding system, which is a fully sealed tubular feeding system. The discharge port is equipped with a high-temperature resistant, oxidation-resistant, and wear-resistant feed plate. The feed system is connected to the feed inlet, which facilitates the addition of raw materials into the rotary kiln body through the feed inlet.

[0017] As a preferred technical solution of this utility model, the variable frequency motor drives the hardened tooth surface four-stage cylindrical gear reducer and the pinion to rotate, and the pinion and the large gear ring are meshed together.

[0018] Using the above technical solution, a variable frequency motor drives a four-stage cylindrical gear reducer with hardened tooth surface and a pinion to rotate, and the pinion and the large gear ring are meshed together, which can drive the rotary kiln body to rotate stably.

[0019] As a preferred technical solution of this utility model, the rotary kiln body is made of 310S and Q355B steel plates rolled and automatically welded, and both the left and right ends of the rotary kiln body are conical structures.

[0020] The above technical solution utilizes rotary kiln bodies made of 310S and Q355B steel plates, rolled and automatically welded. Both ends of the kiln body are conical, reducing the use of refractory bricks. Each unit reduces refractory brick usage by 20 tons.

[0021] As a preferred technical solution of this utility model, the cover is fixed on the upper hanger and covers the outside of the rotary kiln body.

[0022] By adopting the above technical solution, the cover is fixed to the upper hanger and covers the outside of the rotary kiln body. By covering the outside of the rotary kiln drawer, it can play a very good protective role.

[0023] As a preferred technical solution of this utility model, auxiliary plates are fixedly connected to both the front and rear ends of the filter purification box, and an "L"-shaped movable pressure plate for pressing and fixing is hinged to the middle of the auxiliary plate. The movable pressure plate forms a flipping structure on the front and rear sides of the filter purification box, and the left end of the movable pressure plate is engaged with the activated carbon filter purification screen.

[0024] Using the above technical solution, auxiliary plates are fixedly connected to both the front and rear ends of the filter purification box, and an "L"-shaped movable pressure plate is hinged to the middle of the auxiliary plate for pressing and fixing. The movable pressure plate forms a flip structure on the front and rear sides of the filter purification box, and the left end of the movable pressure plate is engaged with the activated carbon filter purification screen, which facilitates the installation and positioning of the activated carbon filter purification screen and the filter purification box.

[0025] As a preferred embodiment of this utility model, a fixing rod is engaged with the middle of the movable pressure plate, and the fixing rod is fixedly connected to the middle of the auxiliary plate.

[0026] By adopting the above technical solution, a fixing rod is connected to the middle of the movable pressure plate, and the fixing rod is fixedly connected to the middle of the auxiliary plate, which can connect and fix the movable pressure plate.

[0027] As a preferred embodiment of this utility model, the outer surface of the fixing rod is threaded with a fixing cap for locking and fixing, and the fixing cap and the movable pressure plate are fitted together.

[0028] The above technical solution uses a fixing cap for locking and fixing connected to the outer surface of the fixing rod by a threaded connection. The fixing cap is fitted to the movable pressure plate, which facilitates the pressing and fixing of the activated carbon filter and makes it easy to disassemble, clean and replace the activated carbon filter.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows: This rotary short kiln changes the components such as the support rollers, tires, and gears in the equipment from castings to forgings, so that they do not need to be replaced or maintained for a long time, reducing maintenance costs, improving equipment operating rate, ensuring that the environmental protection equipment does not need to be disassembled and reassembled, saving costs and time, and improving equipment operating rate. The entire drive system is more convenient and can stably drive the rotary kiln body to rotate. Moreover, it is more convenient to feed through the rotary kiln body and discharge through the feed port. Combined with the setting of the adsorption mechanism, it can adsorb and purify the dust generated during feeding and the flue gas during discharge, preventing pollution to the environment.

[0030] 1. It is equipped with a one-way conveying component, which consists of a variable frequency motor, a hardened four-stage cylindrical gear reducer, a pinion, and a large gear ring fixed on the outer side of the right end of the base. Through the setting of the one-way conveying component, the rotary kiln body can be stably driven to rotate. Moreover, all components are forged, which has a longer service life and reduces maintenance costs.

[0031] 2. It is equipped with a discharge port, a feed port, and a cover. The feed port is connected to the external feeding system to add materials into the rotary kiln body. The discharge port is equipped with a high-temperature resistant, oxidation-resistant, and wear-resistant feed port plate to improve the high-temperature resistance of the discharge port when discharging materials. Combined with the cover installed on the outside of the rotary kiln body, it can play a good protective role.

[0032] 3. An adsorption mechanism is provided, which includes a filter purification box fixed to the upper end of the cover and an activated carbon filter purification screen inserted into the middle of the filter purification box. The upper end of the filter purification box is connected to an external exhaust fan through a pipe, which can adsorb and purify the dust during feeding and the smoke during discharging, thereby reducing environmental pollution. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0034] Figure 2 This is a frontal sectional view of the present invention.

[0035] Figure 3 This is a side view sectional diagram of the present invention;

[0036] Figure 4 This is a schematic diagram of the overall structure of the rotary kiln body and the trolley of this utility model;

[0037] Figure 5 This is a bottom view of the filter purification box, activated carbon filter purification screen and movable pressure plate of this utility model.

[0038] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle;

[0039] Figure 7 This is a schematic diagram of the overall structure of the filter purification box and activated carbon filter purification screen in disassembled state.

[0040] In the diagram: 1. Base; 2. Secondary casting layer; 3. Rotary kiln body; 4. Feed inlet; 5. Discharge outlet; 6. Large gear ring; 7. Small gear; 8. One-way conveyor assembly; 9. Drag wheel; 10. Fixed platform; 11. Cover; 12. Filter and purification box; 13. Activated carbon filter and purification screen; 14. Auxiliary plate; 15. Movable pressure plate; 16. Fixed rod; 17. Fixed cap. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Please see Figures 1-7 .

[0043] To address the problems of poor stability in driving the rotary kiln body 3, inconvenient feeding and discharging operations, environmental pollution from feed dust and exhaust fumes, and difficulties in dust and fume treatment, as well as the inconvenience of maintenance and modification of the external components, which require disassembling the cover and pipes for component replacement, resulting in significant time and cost, this solution proposes a short rotary kiln, comprising a base 1 and a rotary kiln body 3. The rotary kiln body 3 and the fixed platform 10 are fitted with drag wheels 9 on both the front and rear sides of the lower end of the rotary kiln body 3. The outer side of the rotary kiln body 3 is fitted with a cover 11, and the upper end of the cover 11 is provided with an adsorption mechanism for filtering and purifying the dust of the feed material and the flue gas of the discharge material. The adsorption mechanism includes a filter purification box 12 fixed on the upper end of the cover 11 and an activated carbon filter purification screen 13 inserted and installed in the middle of the filter purification box 12. The upper end of the filter purification box 12 is connected to an external exhaust fan through a pipe.

[0044] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a secondary casting layer 2 is provided at the upper end of the base 1, and a feed inlet 4 is fixedly connected to the upper end of the rotary kiln body 3. A discharge port 5 is fixedly connected to the lower end of the rotary kiln body 3. The feed inlet 4 is connected to an external feeding system, which adopts a fully sealed tubular feeding system. The discharge port 5 is equipped with a high-temperature resistant, oxidation-resistant, and wear-resistant feed plate. The feeding system adds material to the rotary kiln body 3 through the feed inlet 4, eliminating leakage points and ensuring environmental protection. This extends the service life of the discharge port 5. The rotary kiln body 3 rotates via a unidirectional conveying assembly 8, which consists of a variable frequency motor, a hardened four-stage cylindrical gear reducer, and a small... The gear 7 and the large gear ring 6 fixed on the outer side of the right end of the base 1 are combined to form a variable frequency motor that drives the hardened tooth surface four-stage cylindrical gear reducer and the small gear 7 to rotate. The small gear 7 and the large gear ring 6 are meshed, thereby driving the rotary kiln body 3 to rotate. Moreover, the left and right sides of the rotary kiln body 3 are both fitted with the drag rollers 9 and rotate relative to each other on the drag rollers 9 to improve the stability of the rotation. When the rotary kiln body 3 rotates to the point where the feed port 4 faces upward, the material enters the kiln from the feed port 4 in the middle of the rotary kiln body 3. The fuel is injected into the kiln from the kiln head and burned. Due to the rotation of the cylinder, the material is rolled along the circumference and calcined to complete its reduction reaction process to produce clinker. It is discharged through the discharge port 5 and finally sent to the hot melt tank to enter the billet washing process.

[0045] Made from 310S and Q355B steel plates that guarantee five mechanical properties, and then welded automatically, the cylinder wall thickness is 25mm, the end plate thickness is 30mm, the gear ring thickness is 30mm, and the tire thickness is 45mm. This makes the cylinder design more reasonable, ensuring the rigidity of the cross-section and improving the stress state of the support device. When the kiln is operating normally, the tire can fit properly on the cylinder to reduce radial deformation. The door opening and closing is done by a robotic arm, ensuring safety. The brake is a safe, reliable, and stable hydraulic brake, replacing the traditional manual lever brake. It saves time and labor, shortens the unloading time of red billets, reduces heat loss, and increases output. The bearing housing uses a heat insulation device, which can effectively reduce the radiant heat generated by the kiln cylinder. The rotary kiln body has a conical structure at both ends, reducing the amount of refractory bricks used. The special castable structure doubles the service life and reduces production costs. Simultaneously, it reduces the load on the equipment, saves electricity for the motor, extends the lifespan of the motor and bearings, reduces wear on the rollers and tires, and increases their service life. Designed to adapt to the significant fluctuations in the price of sodium sulfide in China, the equipment can increase output and operate at full capacity without problems during periods of high prices. The inlet and outlet of the equipment are all made of 310S stainless steel, and the tires, gears, and rollers are all forged parts, replacing the castings of the original equipment. This greatly improves the equipment's service life and operating rate, thereby increasing enterprise efficiency.

[0046] A fixed platform 10 is provided at the right end of the rotary kiln body 3, and a cover 11 is provided on the outside of the rotary kiln body 3, such as... Figure 5 , Figure 6 and Figure 7 As shown, the dust generated during the feeding process and the flue gas generated during the discharging process can be purified by activating an external suction fan, which creates negative pressure in the filter purification chamber 12 to adsorb and purify the dust and flue gas, reducing environmental pollution. In addition, an activated carbon filter 13 is inserted and installed in the filter purification chamber 12. The dust and flue gas are filtered and purified by the activated carbon filter 13 to prevent them from being directly sucked into the suction fan. When it is necessary to disassemble, clean and replace the activated carbon filter 13, the fixing cap 17 threaded to the outer surface of the fixing rod 16 is rotated. The fixing cap 17 is disengaged from the movable pressure plate 15, thereby loosening the limit between the movable pressure plate 15 and the fixing rod 16. Then, the movable pressure plate 15 is flipped and rotated on the auxiliary plate 14. The movable pressure plate 15 loosens the pressing limit on the activated carbon filter 13, and then the activated carbon filter 13 is pulled out from the filter purification chamber 12 to achieve disassembly, cleaning and replacement.

[0047] 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 rotary short kiln, comprising a base (1), a rotary kiln body (3), and a fixed platform (10); Its features are, Also includes: The unidirectional conveying component (8) is composed of a variable frequency motor, a hardened four-stage cylindrical gear reducer, a pinion (7) and a large gear ring (6) fixed on the outer side of the right end of the base (1). The front and rear sides of the lower end of the rotary kiln body (3) are fitted with trolleys (9). The rotary kiln body (3) is fitted with a cover (11) on the outside, and the upper end of the cover (11) is provided with an adsorption mechanism for filtering and purifying the dust of the feed material and the flue gas of the discharge material. The adsorption mechanism includes a filter purification box (12) fixed at the upper end of the cover (11) and an activated carbon filter purification screen (13) inserted and installed in the middle of the filter purification box (12). The upper end of the filter purification box (12) is connected to an external exhaust fan through a pipe.

2. A rotary short kiln according to claim 1, characterized in that: The upper end of the base (1) is provided with a secondary pouring layer (2), and both the left and right sides of the upper end of the base (1) are rotatably connected with towing wheels (9).

3. A rotary short kiln according to claim 1, characterized in that: The upper part of the rotary kiln body (3) is fixedly connected to the middle of the feed port (4), and the lower part of the rotary kiln body (3) is fixedly connected to the middle of the discharge port (5). At the same time, the inner side of the rotary kiln body (3) is provided with a refractory lining.

4. A rotary short kiln according to claim 3, characterized in that: The feed inlet (4) is connected to an external feed system, and the feed system adopts a fully sealed tubular feeding system. The discharge port (5) is equipped with a high-temperature resistant, oxidation-resistant, and wear-resistant discharge plate.

5. A rotary short kiln according to claim 1, characterized in that: The variable frequency motor drives the hardened tooth surface four-stage cylindrical gear reducer and the pinion (7) to rotate, and the pinion (7) and the large gear ring (6) are meshed.

6. A rotary short kiln according to claim 1, characterized in that: The rotary kiln body (3) is made of 310S and Q355B steel plates rolled and automatically welded, and both the left and right ends of the rotary kiln body (3) are conical structures.

7. A rotary short kiln according to claim 1, characterized in that: The cover (11) is fixed on the upper end of the hanger, and the cover (11) covers the outside of the rotary kiln body (3).

8. A rotary short kiln according to claim 1, characterized in that: The front and rear ends of the filter purification box (12) are fixedly connected with auxiliary plates (14), and the middle of the auxiliary plates (14) is hinged to a movable pressure plate (15) with an "L" shape structure for pressing and fixing. The movable pressure plate (15) forms a flip structure on the front and rear sides of the filter purification box (12), and the left end of the movable pressure plate (15) is engaged with the activated carbon filter purification mesh (13).

9. A rotary short kiln according to claim 8, characterized in that: The movable pressure plate (15) is engaged with a fixing rod (16) in the middle, and the fixing rod (16) is fixedly connected to the middle of the auxiliary plate (14).

10. A rotary short kiln according to claim 9, characterized in that: The outer surface of the fixing rod (16) is threaded with a fixing cap (17) for locking and fixing, and the fixing cap (17) is fitted with the movable pressure plate (15).

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