Auxiliary heating rotary kiln red mud treatment device
By adopting a rotary reciprocating inner drum and auxiliary heating structure in the rotary kiln red mud treatment device, the problems of high energy consumption, large footprint, and long production cycle of existing devices have been solved, achieving efficient drying and energy-saving treatment of red mud.
Patent Information
- Application Number
- CN202411660155.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-01-07
AI Technical Summary
Existing rotary kiln red mud roasting equipment suffers from problems such as high energy consumption, large footprint, long production cycle, and insufficient applicability, especially the frequent occurrence of undercooked materials due to the high water content of the red mud.
The rotary kiln red mud treatment device with auxiliary heating includes an outer sleeve and a rotary reciprocating assembly. The rotary reciprocating structure of the inner cylinder increases the contact area between the red mud and the high-temperature flue gas. Auxiliary heating is provided by heat storage bricks and serpentine heating wires installed in the interlayer between the outer sleeve and the inner sleeve. Combined with the preheating feed assembly, the drying efficiency of the red mud is improved.
The device size was reduced, the drying efficiency of red mud was improved, energy was saved, the presence of undercooked material was prevented, the quality of clinker was ensured, and the efficient treatment of red mud was achieved.
Smart Images
Figure CN119267920A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of rotary kilns, in particular to an auxiliary heating rotary kiln red mud treatment device. Background Art
[0002] Red mud is the polluting waste slag discharged when the aluminum industry extracts alumina. It is the biggest problem in waste discharge in electrolytic aluminum production because the amount of red mud in the production process is huge, which causes serious pollution to the environment. Long-term accumulation requires a large amount of land. At the same time, because red mud contains a large amount of alkaline liquid, it will seep into the ground and cause serious pollution to the land and groundwater.
[0003] However, in the currently used red mud roasting rotary kiln, the preheating and drying, calcination and reduction of the red mud are all performed in the same cylinder. Since the water content of the red mud after dealkalization treatment is relatively high, the rotation speed of the roasting kiln is relatively slow, resulting in a large energy consumption for dehydration and drying of the red mud. At the same time, in order to avoid the appearance of raw materials due to the high water content of the red mud when it reaches the calcination and reduction stage, the red mud roasting rotary kiln in the prior art is generally very long. The huge size of the device not only leads to excessive occupation of space but also leads to a long production cycle and insufficient applicability.
[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a rotary kiln red mud treatment device with auxiliary heating is proposed. Summary of the invention
[0005] The object of the present invention is to provide a rotary kiln red mud treatment device with auxiliary heating to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary heating rotary kiln red mud treatment device, comprising an outer sleeve and a rotating reciprocating component, a rotating reciprocating component is arranged inside the outer sleeve, and the rotating reciprocating component comprises a large gear ring, a slewing bearing, a guide rod, an inner drum, a shoveling plate, a kiln head feed port, a spring and a ball bracket, a slewing bearing is fixed to the inner side of the large gear ring, and two guide rods are fixed to the inner disk of the large gear ring, the ends of the two guide rods are slidably matched with the inner drum, and shoveling plates are evenly distributed on the inner wall of the inner drum, a kiln head feed port is coaxially fixed inside the middle hole of the large gear ring, and the kiln head feed port extends to one end inside the inner drum, a spring is arranged in the gap between the large gear ring and the inner drum structure, and a ball bracket is fixed to the end edge of the inner drum.
[0007] Furthermore, the large gear ring is rotatably matched with the front end opening of the outer sleeve through a slewing bearing, and the length of the outer sleeve is greater than that of the inner sleeve, and the inner diameter of the outer sleeve is greater than the outer diameter of the inner sleeve.
[0008] Furthermore, the kiln head feed port inside the hole of the large gear ring is a coaxially arranged hollow structure, and the large gear ring is slidably matched with the inner drum through two inner guide rods, and the large gear ring is elastically matched with the inner drum through a spring.
[0009] Furthermore, the top of the front end of the outer sleeve is connected to a smoke outlet, and the bottom of the rear end of the outer sleeve is connected to a material discharge port.
[0010] Furthermore, an auxiliary heating assembly is connected to the rear end of the outer sleeve, and the auxiliary heating assembly includes a kiln tail smoke chamber, a smoke inlet and an inlet pipe. The kiln tail smoke chamber is fixedly installed on the rear end opening of the outer sleeve, and the top of the kiln tail smoke chamber is connected to the smoke inlet. An inlet pipe is fixed inside the kiln tail smoke chamber, and the inlet pipe extends to the other end of the inner rotating drum.
[0011] Furthermore, the auxiliary heating component also includes a power supply and a heating wire. The power supply is fixed on the outside of the kiln tail smoke chamber, and the power supply is electrically connected to the heating wire. The part of the heating wire located in the kiln tail smoke chamber has a serpentine structure.
[0012] Furthermore, the auxiliary heating assembly also includes heat storage bricks and perforations. The heating wire is located in the interlayer between the outer sleeve and the inner drum and is connected to the heat storage bricks. The joints of the heat storage bricks are bonded by fireproof mud. A perforation is opened through the middle of the heat storage brick, and the heating wire is located inside the perforation and spirally connected.
[0013] Furthermore, a rotating pin is fixed to the upper inner end of the kiln tail smoke chamber, and a ring plate is rotatably installed inside the rotating pin, the hole in the ring plate is matched with the gap of the inlet pipe, and the bottom edge of the ring plate is connected with an adjusting rod.
[0014] Furthermore, the root of the kiln tail smoke chamber is fixed to the base, and the front end of the base is rotatably matched with the kiln head feed port through a bearing bracket, a motor is fixed in the middle of the base, and the output end of the motor is connected to a reducer through a coupling, the output end of the reducer is transmission-connected with a pinion, and the pinion is rotatably installed inside the bridge bearing, and the pinion is rotationally transmitted to the inner drum through meshing with the large gear ring.
[0015] Furthermore, the kiln head feed port is externally connected with a preheating feed assembly, and the preheating feed assembly includes a silo, a heat exchange chamber, an exhaust gas inlet and outlet pipe, a heat conductive baffle, a preheating silo, a heat conductive wire, an inlet and outlet, a flip rod, a driven cone wheel and a transmission umbrella wheel. A heat exchange chamber is arranged at the bottom end of the silo, and exhaust gas inlet and outlet pipes are connected at both ends of the heat exchange chamber, and the inlet end of the exhaust gas inlet and outlet pipe is connected to the smoke outlet through an induced draft fan. Heat conductive baffles are staggered and fixed on the inner walls of the upper and lower ends of the heat exchange chamber, and the heat conductive baffles are fixed on the inner walls of the upper and lower ends of the heat exchange chamber. It is a copper metal plate with fins on the outer wall. A preheating bin is arranged at the top of the inner part of the silo, and a heat-conducting wire is spirally wrapped around the outer part of the preheating bin, and the heat-conducting wire is welded and fixed to the heat-conducting baffle. Inlet and outlet ports are connected at both ends of the preheating bin, and the outlet ends of the inlet and outlet ports are connected to the feed port of the kiln head. A flip rod is rotatably installed in the middle part of the preheating bin, and the flip rod is coaxially connected with the driven cone wheel. A transmission umbrella wheel is meshed and driven on the side of the driven cone wheel, and the transmission umbrella wheel is coaxially connected to the output end of the motor.
[0016] The present invention provides a rotary kiln red mud treatment device with auxiliary heating, which has the following beneficial effects: 1. During the use of the present invention, the present application adopts the rotating reciprocating structure design of the inner drum. On the one hand, with the help of the lifting plates distributed on the inner wall of the inner drum, the red mud raw material is lifted and dropped during the rotation process, thereby increasing the contact area between the red mud raw material and the high-temperature flue gas to improve the drying effect. On the other hand, during the reciprocating stroke of the inner drum, the red mud raw material is thrown back and forth due to inertia. Under the combined action of the above two movements, the red mud raw material is located in the inner drum and jumps back and forth, effectively extending the stroke of the red mud raw material in the inner drum, thereby shortening the length required for the red mud roasting rotary kiln to achieve the expected drying effect, reducing the volume of the device and improving the drying effect.
[0017] 2. During the use of the present invention, the red mud roasting rotary kiln of the present application is composed of a fixed outer sleeve and a movable inner sleeve. During the rotation and roasting of the inner drum, the outer sleeve is stationary, which reduces the load of the driving module to achieve energy saving. In actual use, the high-temperature flue gas enters the kiln tail smoke chamber through the smoke inlet and enters the inner drum through the introduction pipe under the action of the blower. The present application arranges heat storage bricks inside the interlayer of the outer sleeve and the inner sleeve, and a heating wire is coiled in the middle perforation of the heat storage brick. Such an arrangement can utilize the low-cost electricity during the off-peak period of the night power grid to complete the electric heat conversion and heat storage inside the heat storage brick, and release the stored heat in the form of thermal radiation during the peak period of the power grid for auxiliary heating, and when the flue gas thermal energy is insufficient, auxiliary heating can also be performed through the serpentine heating wire part located in the kiln tail smoke chamber, which ensures the heat supply while making the heat distribution in the inner drum more uniform, achieving better drying effect, and preventing the mixing of raw materials before the red mud reaches the calcination reduction stage. The high-temperature exhaust gas generated during the drying process affects the quality of the clinker. The high-temperature exhaust gas generated during the drying process is discharged from the kiln body through the smoke outlet. The present application guides the originally discarded high-temperature exhaust gas to the heat exchange chamber for secondary utilization through the setting of the induced draft fan, and changes the transmission path of the high-temperature exhaust gas in the heat exchange chamber by staggeredly arranging heat-conducting baffles on the inner walls at the upper and lower ends of the heat exchange chamber, thereby extending the residence time to ensure that the heat-conducting baffles can fully exchange heat, and further conducts the heat to the preheating bin above through the heat-conducting wire, so that the raw materials put into the preheating bin from the silo feed port can be preheated, and the continuous input of low-temperature raw materials into the hot kiln section can be prevented from causing the temperature in the kiln to drop and the need to stop for heating. In addition, the present application also arranges a rotating flipping rod in the preheating bin to make the raw materials heated more evenly, and the power source of the flipping rod also comes from the motor. While the motor drives the inner drum to rotate and reciprocate, it further drives the flipping rod to rotate continuously at a uniform speed through the meshing transmission of the transmission umbrella wheel and the driven cone wheel at the output end, thereby improving the heating efficiency of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall external structure of the device of the present invention; Figure 2 It is a schematic diagram of the overall internal structure of the device of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the outer sleeve of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the kiln tail smoke chamber of the present invention; Figure 5 This is a schematic diagram of the explosion structure of the heat storage brick of the present invention; Figure 6 This is a schematic diagram of the ring plate structure of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the inner drum of the present invention; Figure 8 This is a schematic diagram of the structure of the preheating feed assembly of the present invention.
[0019] In the figure: 1, outer sleeve; 2, smoke outlet; 3, feed port; 4, auxiliary heating component; 401, kiln tail smoke chamber; 402, smoke inlet; 403, inlet pipe; 404, power supply; 405, heating wire; 406, heat storage brick; 407, perforation; 5, rotating pin; 6, ring plate; 7, adjusting rod; 8, base; 9, motor; 10, reducer; 11, small gear; 12, bridge bearing; 13, rotating reciprocating component; 1301, large ring gear; 1302, rotating Support; 1303, guide rod; 1304, inner drum; 1305, copying plate; 1306, kiln head feed port; 1307, spring; 1308, ball bracket; 14, preheating feed assembly; 1401, silo; 1402, heat exchange chamber; 1403, exhaust gas inlet and outlet pipes; 1404, heat-conducting baffle; 1405, preheating bin; 1406, heat-conducting wire; 1407, feed port; 1408, flip rod; 1409, driven cone wheel; 1410, transmission umbrella wheel. DETAILED DESCRIPTION
[0020] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention. See also Figures 1 to 7 The present invention provides a technical solution: an auxiliary heating rotary kiln red mud treatment device, comprising an outer sleeve 1 and a rotating reciprocating component 13, wherein the outer sleeve 1 is provided with the rotating reciprocating component 13, wherein the rotating reciprocating component 13 comprises a large gear ring 1301, a slewing bearing 1302, a guide rod 1303, an inner drum 1304, a shoveling plate 1305, a kiln head feed port 1306, a spring 1307 and a ball support 1308, wherein the slewing bearing 1302 is fixed to the inner side of the large gear ring 1301, and two guide rods 1303 are fixed to the inner disk of the large gear ring 1301, and the ends of the two guide rods 1303 are slidably matched with the inner drum 1304, and the shoveling plates 1305 are evenly distributed on the inner wall of the inner drum 1304, and the kiln head feed port 1306 is coaxially fixed to the inner hole of the large gear ring 1301. The kiln feed port 1306 is provided with a spring 1307 in the gap between the large gear ring 1301 and the inner drum 1304, and a ball bracket 1308 is fixed to the edge of the end of the inner drum 1304. The large gear ring 1301 is rotatably matched with the front end opening of the outer sleeve 1 through a slewing bearing 1302, and the length of the outer sleeve 1 is greater than that of the inner drum 1304, and the inner diameter of the outer sleeve 1 is greater than the outer diameter of the inner drum 1304. The kiln feed port 1306 inside the hole of the large gear ring 1301 is a hollow structure arranged coaxially, and the large gear ring 1301 is slidably matched with the inner drum 1304 through two inner guide rods 1303, and the large gear ring 1301 is elastically matched with the inner drum 1304 through a spring 1307; The specific operation is as follows. In the present application, a ring plate 6 is installed on the inner side of the kiln tail smoke chamber 401, i.e., the tail of the inner rotating drum 1304. When in use, the ring plate 6 can be driven to deviate from the top rotating pin 5 through the adjusting rod 7 to adjust the inclination angle. In the process of the driving module driving the large gear ring 1301 to rotate, the large gear ring 1301 drives the inner rotating drum 1304 to rotate synchronously through the two guide rods 1303 on the inner disk. On the other hand, the ball bracket 1308 at the tail of the inner rotating drum 1304 is located on the disk of the ring plate 6 and rotates, so that the inner rotating drum 1304 rotates inside the outer sleeve 1 and reciprocates horizontally at the same time, and is further reset with the assistance of the spring 1307. The present application adopts the rotating reciprocating structure design of the inner drum 1304. On the one hand, with the help of the lifting plates 1305 distributed on the inner wall of the inner drum 1304, the red mud raw material is lifted and dropped during the rotation process, thereby increasing the contact area between the red mud raw material and the high-temperature flue gas to improve the drying effect. On the other hand, during the reciprocating stroke of the inner drum 1304, the red mud raw material is thrown back and forth due to inertia. Under the combined action of the above two movements, the red mud raw material is located in the inner drum 1304 and jumps back and forth, effectively extending the stroke of the red mud raw material in the inner drum 1304, thereby shortening the length required for the red mud roasting rotary kiln to achieve the expected drying effect, reducing the volume of the device and improving the drying effect. See also Figures 2 to 5The front end top of the outer sleeve 1 is connected with a smoke outlet 2, and the rear end bottom of the outer sleeve 1 is connected with a feed port 3, the rear end of the outer sleeve 1 is connected with an auxiliary heating component 4, the auxiliary heating component 4 includes a kiln tail smoke chamber 401, a smoke inlet 402 and an inlet pipe 403, the kiln tail smoke chamber 401 is fixedly installed on the rear end opening of the outer sleeve 1, and the top of the kiln tail smoke chamber 401 is connected with the smoke inlet 402, the inner side of the kiln tail smoke chamber 401 is fixed with an inlet pipe 403, and the inlet pipe 403 extends to the other end of the inner drum 1304, the auxiliary heating component 4 also includes a power supply 404 and a heating wire 405, the outer side of the kiln tail smoke chamber 401 is fixed with a power supply 404, and the power supply 404 is electrically connected to the heating wire 405, and the part of the heating wire 405 located in the kiln tail smoke chamber 401 is a serpentine structure, the auxiliary heating component 4 also includes heat storage bricks 406 and perforations 407, the heating wire 405 is located between the outer sleeve 1 and the inner drum The interlayer 1304 is connected with a heat storage brick 406, and the joint of the heat storage brick 406 is bonded by fireproof mud. A through hole 407 is opened in the middle of the heat storage brick 406, and the heating wire 405 is spirally connected inside the through hole 407. A rotating pin 5 is fixed to the upper end of the inner side of the kiln tail smoke chamber 401, and a ring plate 6 is rotatably installed inside the rotating pin 5. The hole in the ring plate 6 is gap-matched with the introduction pipe 403, and an adjusting rod 7 is connected to the bottom edge of the ring plate 6. The root of the kiln tail smoke chamber 401 is fixed to the base 8, and the front end of the base 8 is rotatably matched with the kiln head feed port 1306 through a bearing bracket. A motor 9 is fixed in the middle of the base 8, and the output end of the motor 9 is connected to a reducer 10 through a coupling. The output end of the reducer 10 is connected to a pinion 11 for transmission, and the pinion 11 is rotatably installed inside the bridge bearing 12, and the pinion 11 is driven to the inner drum 1304 through meshing with the large gear ring 1301; The specific operation is as follows: the red mud roasting rotary kiln of the present application is composed of a fixed outer sleeve 1 and a movable inner sleeve. The motor 9 drives the pinion 11 located inside the bridge bearing 12 to rotate through the reducer 10. The pinion 11 is further driven to rotate the inner drum 1304 through the meshing with the large gear ring 1301. During the roasting process of the inner drum 1304, the outer sleeve 1 is stationary, reducing the load of the drive module to achieve energy saving. In actual use, the high-temperature flue gas enters the kiln tail smoke chamber 401 through the flue gas inlet 402 and enters the inner drum 1304 through the introduction pipe 403 under the action of the blower. In the interlayer of the outer sleeve 1 and the inner sleeve, the present application The heat storage brick 406 is provided in the inner part, and the heating wire 405 is coiled in the middle perforation 407 of the heat storage brick 406. Such a configuration can utilize the low-price electricity during the off-peak period of the night power grid to complete the electric heat conversion and heat storage inside the heat storage brick 406, and release the stored heat in the form of thermal radiation during the peak period of the power grid for auxiliary heating. When the flue gas heat energy is insufficient, the serpentine heating wire 405 located in the kiln tail smoke chamber 401 can also be used for auxiliary heating. While ensuring the heat energy supply, it also makes the heat distribution in the inner drum 1304 more uniform, the drying effect is better, and the mixing of raw materials before the red mud reaches the calcination reduction stage affects the quality of the clinker. See also Figure 8 The kiln head feed port 1306 is externally connected with a preheating feed assembly 14, which includes a silo 1401, a heat exchange chamber 1402, an exhaust gas inlet and outlet pipe 1403, a heat-conducting baffle 1404, a preheating silo 1405, a heat-conducting wire 1406, an inlet and outlet 1407, a flip rod 1408, a driven cone wheel 1409 and a transmission umbrella wheel 1410. The heat exchange chamber 1402 is arranged at the bottom end of the silo 1401, and the exhaust gas inlet and outlet pipes 1403 are connected at both ends of the heat exchange chamber 1402, and the inlet end of the exhaust gas inlet and outlet pipe 1403 is connected to the smoke outlet 2 through the induced draft fan, and the heat-conducting baffles 1404 are staggeredly fixed on the inner walls of the upper and lower ends of the heat exchange chamber 1402, and the heat-conducting baffles 1404 is a copper metal plate with fins on the outer wall. A preheating bin 1405 is provided at the top of the inner part of the bin 1401. A heat-conducting wire 1406 is spirally wrapped around the outer part of the preheating bin 1405. The heat-conducting wire 1406 is welded and fixed to the heat-conducting baffle 1404. Inlet and outlet ports 1407 are connected at both ends of the preheating bin 1405. The outlet end of the inlet and outlet ports 1407 is connected to the kiln head feed port 1306. A flip rod 1408 is rotatably installed in the middle of the preheating bin 1405. The flip rod 1408 is coaxially connected to a driven cone wheel 1409. A transmission umbrella wheel 1410 is meshed and driven on the side of the driven cone wheel 1409. The transmission umbrella wheel 1410 is coaxially connected to the output end of the motor 9. The specific operation is as follows: the high-temperature exhaust gas generated during the drying process is discharged from the kiln body through the smoke outlet 2. The present application guides the originally discarded high-temperature exhaust gas to the heat exchange chamber 1402 for secondary utilization through the setting of the induced draft fan. The transmission path of the high-temperature exhaust gas in the heat exchange chamber 1402 is changed by staggeredly setting the heat-conducting baffles 1404 on the inner walls of the upper and lower ends of the heat exchange chamber 1402, and the residence time is extended to ensure that the heat-conducting baffles 1404 can fully exchange heat, and further conduct the heat to the upper preheating bin 1405 through the heat-conducting wire 1406, so that the material is fed into the preheating bin 1405 from the feed port of the bin. The raw materials can be preheated to prevent the continuous input of low-temperature raw materials into the hot kiln section, which will cause the temperature in the kiln to drop and require shutdown for heating. In addition, the present application also arranges a rotating flipping rod 1408 in the preheating bin 1405 to make the raw materials heated more evenly, and the power source of the flipping rod 1408 also comes from the motor 9. While the motor 9 drives the inner drum 1304 to rotate and reciprocate, it further drives the flipping rod 1408 to rotate continuously at a uniform speed through the meshing transmission of the transmission bevel wheel 1410 at the output end and the driven cone wheel 1409, thereby improving the heating efficiency of the raw materials.
[0021] It is worth noting that the specific process of using the red mud roasting rotary kiln of the present application to treat red mud is: by adding carbon-containing materials and adjusting agents into the red mud containing sodium heavy alkali solution, using a rotary kiln as the main process treatment equipment, adding the mixture of red mud containing sodium heavy alkali solution, carbon-containing materials and external adjusting agents into the rotary kiln, and separating and decomposing the red mud through the smelting reaction in the rotary kiln in a manner different from the conventional smelting process, and extracting iron, ferrosilicon, high-temperature silica clinker blocks, industrial glass, and sodium salt ultrafine powder collected in the smoke and gas deposited silicon micropowder in turn.
[0022] In summary, when the auxiliary heating rotary kiln red mud disposal device is used, the red mud roasting rotary kiln of the present application is composed of a fixed outer sleeve 1 and a movable inner sleeve. The motor 9 drives the small gear 11 located inside the bridge bearing 12 to rotate through the reducer 10, and the small gear 11 is further driven to rotate the inner drum 1304 through the meshing with the large gear ring 1301. During the roasting process of the inner drum 1304, the outer sleeve 1 is stationary, reducing the load of the drive module to achieve energy saving. In actual use, high-temperature flue gas enters the kiln tail smoke chamber 401 through the flue gas inlet 402 and enters the inner drum 1304 through the introduction pipe 403 under the action of the blower. The present application is provided with a heat storage brick 406 inside the interlayer of the outer sleeve 1 and the inner sleeve, and the heat storage brick 406 has a hole 4 in the middle. 07 is provided with a heating wire 405 coiled therein. This arrangement can utilize the low-price electricity during the off-peak period of the night power grid to complete the electric-heat conversion and store heat inside the heat storage brick 406, and release the stored heat in the form of thermal radiation during the peak period of the power grid for auxiliary heating. When the flue gas thermal energy is insufficient, auxiliary heating can also be performed through the serpentine heating wire 405 located in the kiln tail smoke chamber 401. While ensuring the heat energy supply, it also makes the heat distribution in the inner drum 1304 more uniform, the drying effect is better, and the mixing of raw materials with red mud before reaching the calcination reduction stage affects the quality of the clinker. The high-temperature exhaust gas generated in the drying process is discharged from the kiln body through the smoke outlet 2. The present application guides the originally discarded high-temperature exhaust gas to the heat exchange chamber 1402 for secondary utilization through the setting of the induced draft fan. By staggeredly arranging heat-conducting baffles 1404 on the inner walls at the upper and lower ends of the heat exchange chamber 1402, the transmission path of the high-temperature exhaust gas in the heat exchange chamber 1402 is changed, the residence time is extended to ensure that the heat-conducting baffles 1404 can fully exchange heat, and the heat is further transferred to the upper preheating bin 1405 through the heat-conducting wire 1406, so that the raw materials put into the preheating bin 1405 from the feed port of the bin can be preheated, and the continuous input of low-temperature raw materials into the hot kiln section can be prevented to cause the temperature in the kiln to drop and the need to stop the kiln for heating. In addition, the present application also arranges a rotating flip rod 1408 in the preheating bin 1405 to make the raw materials heated more evenly, and the power source of the flip rod 1408 also comes from the motor 9. While the motor 9 drives the inner drum 1304 to rotate and reciprocate, In one step, the transmission bevel wheel 1410 at the output end is meshed with the driven cone wheel 1409 to drive the flip rod 1408 to rotate continuously at a uniform speed, thereby improving the heating efficiency of the raw materials. In the present application, a ring plate 6 is installed on the inner side of the kiln tail smoke chamber 401, that is, the tail of the inner drum 1304. When in use, the ring plate 6 can be driven by the adjusting rod 7 to offset the rotating pin 5 at the top to adjust the inclination angle. In the process of the driving module driving the large gear ring 1301 to rotate, the large gear ring 1301 drives the inner drum 1304 to rotate synchronously through the two guide rods 1303 on the inner disk. On the other hand, the ball bracket 1308 at the tail of the inner drum 1304 is located on the disk of the ring plate 6 and rotates, so that the inner drum 1304 rotates inside the outer sleeve 1 and reciprocates horizontally at the same time.And further, the spring 1307 assists in resetting. The present application adopts the reciprocating structure design of the inner drum 1304. On the one hand, with the help of the lifting plates 1305 distributed on the inner wall of the inner drum 1304, the red mud raw materials are lifted and dropped during the rotation process, increasing the contact area between the red mud raw materials and the high-temperature flue gas to improve the drying effect. On the other hand, during the reciprocating stroke of the inner drum 1304, the red mud raw materials are thrown back and forth due to inertia. Under the combined action of the above two movements, the red mud raw materials are located in the inner drum 1304 and jump back and forth, effectively extending the stroke of the red mud raw materials in the inner drum 1304, thereby shortening the length required for the red mud roasting rotary kiln to achieve the expected drying effect, reducing the volume of the device and improving the drying effect.
[0023] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various implementations with various modifications suitable for specific uses.
Claims
1. A rotary kiln red mud treatment device with auxiliary heating, characterized in that: The invention comprises an outer sleeve (1) and a rotary reciprocating assembly (13), wherein the outer sleeve (1) is provided with a rotary reciprocating assembly (13), wherein the rotary reciprocating assembly (13) comprises a large gear ring (1301), a slewing bearing (1302), a guide rod (1303), an inner rotating drum (1304), a lifting plate (1305), a kiln head feeding port (1306), a spring (1307) and a ball support (1308), wherein the inner side of the large gear ring (1301) is fixed with a slewing bearing (1302), and the inner side disk of the large gear ring (1301) is fixed with two guide rods ( 1303), the ends of the two guide rods (1303) are slidably matched with the inner drum (1304), and the inner wall of the inner drum (1304) is evenly distributed with lifting plates (1305), a kiln head feed port (1306) is coaxially fixed inside the hole of the large gear ring (1301), and the kiln head feed port (1306) extends to one end inside the inner drum (1304), a spring (1307) is arranged in the structural gap between the large gear ring (1301) and the inner drum (1304), and a ball bracket (1308) is fixed to the edge of the end of the inner drum (1304).
2. The auxiliary heating rotary kiln red mud treatment device according to claim 1, characterized in that: The large gear ring (1301) is rotatably matched with the front end opening of the outer sleeve (1) via a slewing bearing (1302), and the length of the outer sleeve (1) is greater than that of the inner rotating cylinder (1304), and the inner diameter of the outer sleeve (1) is greater than the outer diameter of the inner rotating cylinder (1304).
3. The auxiliary heating rotary kiln red mud treatment device according to claim 1, characterized in that: The kiln head feed port (1306) inside the hole of the large gear ring (1301) is a coaxially arranged hollow structure, and the large gear ring (1301) is slidably matched with the inner rotating drum (1304) through two inner guide rods (1303), and the large gear ring (1301) is elastically matched with the inner rotating drum (1304) through a spring (1307).
4. The auxiliary heating rotary kiln red mud treatment device according to claim 1, characterized in that: The top of the front end of the outer sleeve (1) is connected to a smoke outlet (2), and the bottom of the rear end of the outer sleeve (1) is connected to a material discharge port (3).
5. The auxiliary heating rotary kiln red mud treatment device according to claim 1, characterized in that: The rear end of the outer sleeve (1) is connected to an auxiliary heating assembly (4), and the auxiliary heating assembly (4) comprises a kiln tail smoke chamber (401), a smoke inlet (402) and an introduction pipe (403). The kiln tail smoke chamber (401) is fixedly mounted on the rear end opening of the outer sleeve (1), and the top of the kiln tail smoke chamber (401) is connected to the smoke inlet (402). The inner side of the kiln tail smoke chamber (401) is fixed with an introduction pipe (403), and the introduction pipe (403) extends to the other end of the inner drum (1304).
6. The auxiliary heating rotary kiln red mud treatment device according to claim 5, characterized in that: The auxiliary heating component (4) further comprises a power supply (404) and a heating wire (405); the power supply (404) is fixed outside the kiln tail smoke chamber (401), and the power supply (404) is electrically connected to the heating wire (405); and the portion of the heating wire (405) located inside the kiln tail smoke chamber (401) is in a serpentine structure.
7. The auxiliary heating rotary kiln red mud treatment device according to claim 6, characterized in that: The auxiliary heating assembly (4) further comprises a heat storage brick (406) and a through hole (407); the heating wire (405) is located in the interlayer between the outer sleeve (1) and the inner rotating cylinder (1304) and is connected to the heat storage brick (406); the joints of the heat storage bricks (406) are bonded by fireproof mud; a through hole (407) is provided through the middle of the heat storage brick (406), and the heating wire (405) is located inside the through hole (407) and is spirally connected.
8. The auxiliary heating rotary kiln red mud treatment device according to claim 5, characterized in that: A rotating pin (5) is fixed to the upper end of the inner side of the kiln tail smoke chamber (401), and a ring plate (6) is rotatably mounted on the inner side of the rotating pin (5), the middle hole of the ring plate (6) is gap-matched with the introduction pipe (403), and an adjusting rod (7) is connected to the bottom edge of the ring plate (6).
9. The auxiliary heating rotary kiln red mud treatment device according to claim 5, characterized in that: The root of the kiln tail smoke chamber (401) is fixed to the base (8), and the front end of the base (8) is rotatably matched with the kiln head feed port (1306) through a bearing bracket. A motor (9) is fixed to the middle of the base (8), and the output end of the motor (9) is connected to a reducer (10) through a coupling. The output end of the reducer (10) is transmission-connected to a pinion (11), and the pinion (11) is rotatably mounted inside the bridge bearing (12), and the pinion (11) is rotationally driven toward the inner drum (1304) through meshing with the large gear ring (1301).
10. The auxiliary heating rotary kiln red mud treatment device according to claim 1, characterized in that: The kiln head feed port (1306) is externally connected to a preheating feed assembly (14), and the preheating feed assembly (14) comprises a silo (1401), a heat exchange chamber (1402), an exhaust gas inlet and outlet pipe (1403), a heat conductive baffle (1404), a preheating silo (1405), a heat conductive wire (1406), an inlet and outlet port (1407), a flip rod (1408), a driven cone wheel (1409) and a transmission bevel wheel (1410). The heat exchange chamber (1402) is arranged at the bottom end of the silo (1401), and both ends of the heat exchange chamber (1402) are connected to the exhaust gas inlet and outlet pipe (1403), and the inlet end of the exhaust gas inlet and outlet pipe (1403) is connected to the smoke outlet (2) through an induced draft fan. Heat conductive baffles (1404) are staggeredly fixed on the inner walls of the upper and lower ends of the heat exchange chamber (1402), and the heat conductive baffles (1404) are staggeredly fixed on the inner walls of the upper and lower ends of the heat exchange chamber (1402). The plate (1404) is a copper metal plate with fins on the outer wall. A preheating bin (1405) is provided at the top of the inner part of the silo (1401). A heat conducting wire (1406) is spirally wound around the outer part of the preheating bin (1405). The heat conducting wire (1406) is welded and fixed to the heat conducting baffle (1404). Both ends of the preheating bin (1405) are connected with inlet and outlet ports (1407). The outlet end of the inlet and outlet ports (1407) is connected with the kiln head inlet port (1306). A flipping rod (1408) is rotatably installed in the middle of the preheating bin (1405). The flipping rod (1408) is coaxially connected with a driven cone wheel (1409). A transmission umbrella wheel (1410) is meshed and driven on the side of the driven cone wheel (1409). The transmission umbrella wheel (1410) is coaxially connected to the output end of the motor (9).