A device for red mud dealkalization for ecological soilization

Abstract

The utility model discloses a kind of red mud dealkalization devices for ecological soil, it is related to red mud dealkalization equipment technical field, including stirring drum, cylinder cover, the rotating hole is opened in the top of cylinder cover, rotating shaft is rotatably installed in the rotating hole. When using, rotating shaft is rotated by control mechanism, rotating shaft further drives multiple stirring rods and stirring blade synchronous rotation, the red mud in stirring drum is stirred, simultaneously, the dealkalization liquid (such as acid solution) in liquid storage tank can enter the liquid inlet circular groove of rotating shaft by connecting mechanism, then flow out through the liquid leakage groove and liquid leakage hole in stirring rod, arc liquid leakage plate can avoid red mud particle to block liquid leakage hole, make dealkalization liquid evenly dispersed into red mud in stirring process, greatly improve the contact area of dealkalization liquid and red mud, solve the problem that dealkalization liquid is easily accumulated in bottom in traditional device, not enough contact leads to poor dealkalization effect, greatly improve dealkalization effect.

Description

Technical Field

[0001] This utility model relates to the technical field of red mud dealkali removal equipment, and in particular to a red mud dealkali removal device for ecological soil treatment. Background Technology

[0002] Red mud is a polluting waste residue discharged during the extraction of alumina in the aluminum industry. On average, 1.0 to 2.0 tons of red mud are generated for every ton of alumina produced.

[0003] The prior art patent CN221693808U discloses a red mud dealkali removal device for ecological soil treatment. It crushes the red mud by contacting the crushing column with the circular plate, which can accelerate the reaction speed of the red mud. However, in actual use, the position of its liquid inlet pipe is fixed. After entering, the acid solution flows downward under the action of gravity and accumulates at the bottom, making it difficult to fully contact and stir with the red mud, resulting in poor dealkali removal effect. In order to solve the above problems, a red mud dealkali removal device for ecological soil treatment is proposed. Utility Model Content

[0004] The purpose of this application is to provide a red mud dealkali removal device for ecological soil treatment, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a red mud dealkali treatment device for ecological soil treatment, comprising a stirring drum and a drum cover. A rotating hole is provided at the top of the drum cover, and a rotating shaft is rotatably installed within the rotating hole. A liquid inlet groove is provided at the top of the rotating shaft. A control mechanism for driving the rotating shaft to rotate is provided inside the drum cover. Multiple stirring rods are fixedly installed on the outer periphery of the rotating shaft. Each stirring rod has a leakage groove communicating with the liquid inlet groove. Multiple leakage holes are provided on the inner periphery of each leakage groove. An arc-shaped leakage plate is provided in each leakage hole. A storage tank is fixedly installed at the top of the drum cover. The rotating shaft and the storage tank are rotatably connected via a connecting mechanism. Two stirring blades are fixedly installed on the outer periphery of each stirring rod. A scraping mechanism that fits against the inner periphery of the stirring drum is provided on the outer periphery of the rotating shaft. A feed hopper is provided at the top of the drum cover, and a crushing mechanism is provided inside the feed hopper.

[0006] Preferably, the control mechanism includes a drive motor, and a transmission cavity communicating with the rotating hole is provided inside the cylinder cover. The drive motor is fixedly installed on the top of the cylinder cover, and the output shaft of the drive motor passes through the transmission cavity. Transmission gears are fixedly sleeved on the outer periphery of both the output shaft of the drive motor and the rotating shaft.

[0007] Preferably, the connecting mechanism includes a connecting pipe, the bottom end of which is rotatably connected to the top end of the rotating shaft, an L-shaped pipe is provided on the inner side wall of the liquid storage tank, the top end of the connecting pipe is fixedly connected to one end of the L-shaped pipe, and a valve is provided on the L-shaped pipe.

[0008] Preferably, a liquid filling pipe is provided on the inner wall of the top of the liquid storage tank, and a screw cap is threaded on the outer wall of the liquid filling pipe. A cylinder is fixedly installed on the side of the liquid storage tank, and the output end of the cylinder passes through the liquid storage tank and is fixedly provided with a piston plate. The outer wall of the piston plate is in contact with the inner wall of the liquid storage tank.

[0009] Preferably, the wall scraping mechanism includes four fixed rods, two mounting rings are fixedly installed on the outer periphery of the rotating shaft, the four fixed rods are respectively fixedly connected to the outer periphery of the two mounting rings, and a scraper is fixedly installed on each of the two matching fixed rods, and the two scrapers are in contact with the inner periphery of the stirring drum.

[0010] Preferably, the crushing mechanism includes two crushing shafts, a rectangular cavity is provided inside the feed hopper, one end of each of the two crushing shafts is rotatably mounted on the inner side wall of the feed hopper, the other end of each of the two crushing shafts passes through the rectangular cavity and is fixedly sleeved with a linkage gear, crushing rollers are fixedly sleeved on the outer periphery of each of the two crushing shafts, a crushing motor is fixedly mounted on the side of the feed hopper, and the output shaft of the crushing motor is connected to the end of one of the crushing shafts.

[0011] Preferably, all of the stirring blades are installed at a 45-degree angle, and an arc-shaped discharge hole is provided on the outer wall of the stirring cylinder, with an arc-shaped sealing plate hinged inside the arc-shaped discharge hole.

[0012] In summary, the technical effects and advantages of this utility model are as follows: In this invention, the device achieves multi-dimensional and uniform addition of dealkali solution through the cooperation of a rotating shaft, stirring rods, a storage tank, and a connecting mechanism. The dealkali solution in the storage tank enters the inlet groove of the rotating shaft through an L-shaped pipe and a connecting pipe, and then flows out through the leakage grooves and leakage holes of each stirring rod. When the rotating shaft drives the stirring rods to rotate, the dealkali solution is dispersed into the red mud from the leakage holes at different heights and positions, avoiding the problem of dealkali solution accumulating at the bottom in traditional devices, greatly increasing the contact area, ensuring that the red mud in each area reacts fully, and significantly improving the dealkali removal effect.

[0013] In this invention, the stirring blades are installed at a 45-degree angle. When rotating, they can not only horizontally stir the red mud, but also generate vertical thrust. This thrust causes the red mud in the stirring drum to form vertical convection circulation. The upper layer of red mud can move downwards, and the lower layer of red mud can turn upwards, breaking the static stratification state of the red mud. This allows the red mud to come into more comprehensive contact with the dealkali solution, avoiding incomplete local dealkali removal. At the same time, it accelerates the reaction rate, further ensuring the uniformity and efficiency of dealkali removal, and improving the final quality of red mud dealkali removal. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of a red mud dealkali removal device for ecological soil treatment in an embodiment of this utility model; Figure 2 This is a partial cross-sectional view of the stirring cylinder, cylinder cover, rotating shaft, and stirring rod in an embodiment of this utility model; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 for Figure 2 Enlarged structural diagram at point B; Figure 5 This is a partial cross-sectional view of the cylinder cover, rotating shaft, connecting shaft, and liquid storage cylinder in an embodiment of this utility model; Figure 6 for Figure 5 Enlarged structural diagram at point C; Figure 7 This is a partial cross-sectional view of the feed hopper in an embodiment of the present invention.

[0016] In the diagram: 1. Stirring drum; 2. Drum cover; 3. Rotating shaft; 4. Drive motor; 5. Transmission gear; 6. Liquid storage tank; 7. L-shaped pipe; 8. Valve; 9. Connecting pipe; 10. Cylinder; 11. Piston plate; 12. Stirring rod; 13. Arc-shaped drain plate; 14. Stirring blade; 15. Fixing rod; 16. Scraper; 17. Feed hopper; 18. Crushing shaft; 19. Linkage gear; 20. Crushing motor; 21. Crushing roller; 22. Arc-shaped sealing plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0018] Example: Reference Figures 1-7 The red mud dealkali treatment device for ecological soil treatment shown includes a stirring drum 1 and a drum cover 2. The top of the drum cover 2 has a rotating hole, and a rotating shaft 3 is rotatably installed in the rotating hole. The top of the rotating shaft 3 is provided with a liquid inlet groove. The drum cover 2 is provided with a control mechanism for driving the rotating shaft 3 to rotate. Multiple stirring rods 12 are fixedly installed on the outer periphery of the rotating shaft 3. Each of the multiple stirring rods 12 has a leakage groove that communicates with the liquid inlet groove. Multiple leakage holes are provided on the inner periphery of the multiple leakage grooves. Each of the multiple leakage holes is provided with an arc-shaped leakage plate 13. A liquid storage tank 6 is fixedly installed on the top of the drum cover 2. The rotating shaft 3 and the liquid storage tank 6 are rotatably connected by a connecting mechanism. Two stirring blades 14 are fixedly installed on the outer periphery of each of the multiple stirring rods 12. A wall scraping mechanism that fits against the inner periphery of the stirring drum 1 is provided on the outer periphery of the rotating shaft 3. A feed hopper 17 is provided on the top of the drum cover 2. A crushing mechanism is provided in the feed hopper 17.

[0019] With the above structure, the rotating shaft 3 is driven to rotate by the control mechanism. The rotating shaft 3 then drives multiple stirring rods 12 and stirring blades 14 to rotate synchronously, stirring the red mud in the stirring drum 1. At the same time, the dealkalizing liquid (such as acid solution) in the storage tank 6 can enter the inlet circular groove of the rotating shaft 3 through the connecting mechanism, and then flow out through the leakage groove and leakage hole in the stirring rod 12. The arc-shaped leakage plate 13 can prevent red mud particles from clogging the leakage hole, so that the dealkalizing liquid is evenly dispersed in the red mud during the stirring process, greatly increasing the contact area between the dealkalizing liquid and the red mud. This solves the problem that the dealkalizing liquid is easy to accumulate at the bottom and the dealkalizing effect is poor due to insufficient contact in traditional devices. In addition, the wall scraping mechanism can clean the red mud attached to the inner wall of the stirring drum 1 when the rotating shaft 3 rotates, and the crushing mechanism can crush the blocky red mud entering the feed hopper 17, further improving the efficiency of the subsequent dealkalizing reaction.

[0020] like Figure 2 and Figure 3 As shown, the control mechanism includes a drive motor 4. Specifically, the drive motor 4 can be controlled by a PLC controller. A transmission cavity communicating with the rotating hole is opened inside the cylinder cover 2. The drive motor 4 is fixedly installed on the top of the cylinder cover 2. The output shaft of the drive motor 4 passes through the transmission cavity. Transmission gears 5 are fixedly sleeved on the outer wall of the output shaft of the drive motor 4 and the outer wall of the rotating shaft 3.

[0021] With the above structure, when it is necessary to drive the rotating shaft 3 to rotate, the drive motor 4 is started. The output shaft of the drive motor 4 drives the transmission gear 5 on its periphery to rotate. Since the two transmission gears 5 mesh with each other, the driven transmission gear 5 will drive the rotating shaft 3 to rotate stably in the rotating hole, thereby driving the stirring component to run at a uniform speed, providing stable power for the full mixing of red mud and dealkalization liquid.

[0022] like Figure 5 and Figure 6 As shown, the connecting mechanism includes a connecting pipe 9, the bottom end of which is rotatably connected to the top end of the rotating shaft 3. An L-shaped pipe 7 is provided on the inner side wall of the liquid storage tank 6. The top end of the connecting pipe 9 is fixedly connected to one end of the L-shaped pipe 7. A valve 8 is provided on the L-shaped pipe 7. Specifically, the valve 8 is an electrically controlled valve, which can be controlled by a PLC controller. This is existing technology, and the specific installation method and working principle will not be elaborated here.

[0023] With the above structure, when the dealkali solution is delivered to the rotating shaft 3, the valve 8 is opened, and the dealkali solution in the storage tank 6 flows into the connecting pipe 9 through the L-shaped pipe 7, and then enters the inlet groove of the rotating shaft 3 through the connecting pipe 9. Since the connecting pipe 9 is rotatably connected to the rotating shaft 3, the connecting pipe 9 can remain fixed during the rotation of the rotating shaft 3, avoiding pipe entanglement or damage, ensuring the continuity of dealkali solution delivery. The valve 8 can flexibly control the start and stop of dealkali solution delivery and the flow rate, which can be adjusted according to the amount of red mud and dealkali requirements, improving the flexibility of the device.

[0024] like Figure 5 As shown, a liquid filling pipe is provided on the inner wall of the top of the liquid storage tank 6, and a screw cap is threaded on the outer wall of the liquid filling pipe. A cylinder 10 is fixedly installed on the side of the liquid storage tank 6. The output end of the cylinder 10 passes through the liquid storage tank 6 and is fixedly provided with a piston plate 11. The outer wall of the piston plate 11 is in contact with the inner wall of the liquid storage tank 6.

[0025] With the above structure, when adding dealkali solution, unscrew the cap on the adding pipe and inject the dealkali solution into the storage tank 6 through the adding pipe. Then tighten the cap to ensure the sealing of the storage tank 6. When it is necessary to transport the dealkali solution, start the cylinder 10. The output end of the cylinder 10 pushes the piston plate 11 to move inside the storage tank 6. The piston plate 11 applies pressure to the dealkali solution, causing the dealkali solution to flow quickly and stably to the L-shaped pipe 7. This structure, by driving the piston with the cylinder 10 to apply pressure, can effectively avoid the problem of uneven flow rate of the dealkali solution caused by gravity transport. Especially when the amount of dealkali solution in the storage tank 6 is small, it can still ensure a stable transport pressure and ensure that the dealkali solution enters the stirring system evenly.

[0026] like Figure 2 and Figure 4As shown, the wall scraping mechanism includes four fixed rods 15. Two mounting rings are fixedly installed on the outer periphery of the rotating shaft 3. The four fixed rods 15 are respectively fixedly connected to the outer periphery of the two mounting rings. Each pair of fixed rods 15 is fixedly installed with a scraper 16. Both scrapers 16 are in contact with the inner periphery of the mixing drum 1.

[0027] With the above structure, when the rotating shaft 3 rotates, the mounting ring on its periphery will drive the four fixed rods 15 to rotate synchronously. The fixed rods 15 will then drive the scraper 16 to move along the inner wall of the mixing drum 1. Since the scraper 16 is in contact with the inner wall of the mixing drum 1, it can scrape off the red mud adhering to the inner wall during the movement, preventing the red mud from adhering and solidifying for a long time. This not only reduces the waste of red mud, but also avoids scale buildup on the inner wall from affecting the subsequent mixing effect and the cleanliness of the device.

[0028] like Figure 7 As shown, the crushing mechanism includes two crushing shafts 18. A rectangular cavity is opened in the feed hopper 17. One end of each of the two crushing shafts 18 is rotatably mounted on the inner side wall of the feed hopper 17. The other end of each of the two crushing shafts 18 passes through the rectangular cavity and is fixedly sleeved with a linkage gear 19. Crushing rollers 21 are fixedly sleeved on the outer periphery of each of the two crushing shafts 18. A crushing motor 20 is fixedly installed on the side of the feed hopper 17. Specifically, the crushing motor 20 can be controlled by a PLC controller. The output shaft of the crushing motor 20 is connected to the end of one of the crushing shafts 18.

[0029] With the above structure, when the lumpy red mud enters from the feed hopper 17, the crushing motor 20 is started. The output shaft of the crushing motor 20 drives the crushing shaft 18 connected to it to rotate. The linkage gear 19 on the crushing shaft 18 drives another linkage gear 19 meshing with it to rotate, thereby causing the two crushing shafts 18 to rotate synchronously in opposite directions. The crushing roller 21 on the crushing shaft 18 rotates accordingly, squeezing and shearing the lumpy red mud. The crushed red mud particles are smaller and have a larger contact area with the dealkali solution, which can accelerate the dealkali reaction speed and improve the dealkali efficiency. This crushing mechanism is integrated into the feed hopper 17, eliminating the need for additional crushing equipment, simplifying the overall structure of the device and reducing equipment costs.

[0030] like Figure 2 and Figure 4 As shown, multiple stirring blades 14 are installed at a 45-degree angle. An arc-shaped discharge hole is provided on the outer wall of the stirring cylinder 1. An arc-shaped sealing plate 22 is hinged in the arc-shaped discharge hole.

[0031] With the above structure, the stirring blades 14, installed at a 45-degree angle, can not only stir the red mud horizontally when rotating, but also generate a vertical tumbling action, causing the red mud to form convection within the stirring drum 1. This further promotes the uniformity of mixing between the red mud and the dealkali removal solution, avoiding incomplete dealkali removal in certain areas. After the dealkali removal operation is completed, the arc-shaped sealing plate 22 is opened, and the stirred red mud can be quickly discharged through the arc-shaped discharge hole. The arc-shaped sealing plate 22 is installed in a hinged manner, making it easy to open and close. When closed, it ensures the sealing of the stirring drum 1, preventing leakage of red mud or dealkali removal solution during the stirring process.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A red mud dealkali treatment device for ecological soil treatment, comprising a stirring drum (1) and a drum cover (2), characterized in that: The top of the cylinder cover (2) is provided with a rotating hole, and a rotating shaft (3) is rotatably installed in the rotating hole. The top of the rotating shaft (3) is provided with a liquid inlet groove. The cylinder cover (2) is provided with a control mechanism for driving the rotating shaft (3) to rotate. Multiple stirring rods (12) are fixedly installed on the outer periphery of the rotating shaft (3). Each of the multiple stirring rods (12) is provided with a leakage groove that communicates with the liquid inlet groove. Multiple leakage holes are provided on the inner periphery of the multiple leakage grooves. Each of the multiple leakage holes is provided with a liquid inlet groove. There is an arc-shaped leakage plate (13), and a liquid storage tank (6) is fixedly installed on the top of the cylinder cover (2). The rotating shaft (3) and the liquid storage tank (6) are rotatably connected by a connecting mechanism. Two stirring blades (14) are fixedly installed on the outer periphery of each of the multiple stirring rods (12). A scraping mechanism that fits against the inner periphery of the stirring cylinder (1) is provided on the outer periphery of the rotating shaft (3). A feed hopper (17) is provided on the top of the cylinder cover (2), and a crushing mechanism is provided inside the feed hopper (17).

2. The red mud dealkali removal device for ecological soil treatment according to claim 1, characterized in that: The control mechanism includes a drive motor (4), and a transmission cavity communicating with the rotating hole is provided inside the cylinder cover (2). The drive motor (4) is fixedly installed on the top of the cylinder cover (2). The output shaft of the drive motor (4) passes through the transmission cavity. The output shaft of the drive motor (4) and the outer wall of the rotating shaft (3) are both fixedly sleeved with transmission gears (5).

3. The red mud dealkali removal device for ecological soil treatment according to claim 1, characterized in that: The connecting mechanism includes a connecting pipe (9), the bottom end of the connecting pipe (9) is rotatably connected to the top end of the rotating shaft (3), an L-shaped pipe (7) is provided on the inner side wall of the liquid storage tank (6), the top end of the connecting pipe (9) is fixedly connected to one end of the L-shaped pipe (7), and a valve (8) is provided on the L-shaped pipe (7).

4. The red mud dealkali removal device for ecological soil treatment according to claim 1, characterized in that: The top inner wall of the liquid storage tank (6) is provided with a liquid filling pipe, and the outer wall of the liquid filling pipe is threaded with a screw cap. A cylinder (10) is fixedly installed on the side of the liquid storage tank (6). The output end of the cylinder (10) passes through the liquid storage tank (6) and is fixedly provided with a piston plate (11). The outer wall of the piston plate (11) is in contact with the inner wall of the liquid storage tank (6).

5. The red mud dealkali removal device for ecological soil treatment according to claim 1, characterized in that: The scraping mechanism includes four fixed rods (15). Two mounting rings are fixedly installed on the outer periphery of the rotating shaft (3). The four fixed rods (15) are respectively fixedly connected to the outer periphery of the two mounting rings. Each pair of fixed rods (15) is fixedly installed with a scraper (16). The two scrapers (16) are in contact with the inner periphery of the stirring drum (1).

6. The red mud dealkali removal device for ecological soil treatment according to claim 1, characterized in that: The crushing mechanism includes two crushing shafts (18). A rectangular cavity is provided inside the feed hopper (17). One end of each of the two crushing shafts (18) is rotatably mounted on the inner side wall of the feed hopper (17). The other end of each of the two crushing shafts (18) passes through the rectangular cavity and is fixedly sleeved with a linkage gear (19). Crushing rollers (21) are fixedly sleeved on the outer periphery of each of the two crushing shafts (18). A crushing motor (20) is fixedly mounted on the side of the feed hopper (17). The output shaft of the crushing motor (20) is connected to the end of one of the crushing shafts (18).

7. A red mud dealkali removal device for ecological soil treatment according to claim 1, characterized in that: The multiple stirring blades (14) are all installed at a 45-degree angle. The outer wall of the stirring cylinder (1) is provided with an arc-shaped discharge hole, and an arc-shaped sealing plate (22) is hinged in the arc-shaped discharge hole.

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