Continuous dehydrating and drying equipment for red mud

Abstract

The utility model belongs to the technical field of industrial solid waste recovery, and provides continuous dewatering and drying equipment for red mud. The dehydrator comprises an inner cylinder, a top sealing cover and an outer cylinder, the top of the inner cylinder is connected with a slurry conveying pipe, the lower end of the inner cylinder is provided with a pug outlet, the top sealing cover covers the upper end of the inner cylinder, the outer wall of the lower part of the inner cylinder is hermetically sleeved with the outer cylinder, and the bottom of the outer cylinder is provided with a drainage pipe; the caking device comprises a silo, forward conveying belts, reverse conveying belts, a hot air input pipe and an exhaust pipe, a blanking port is formed in the lower part of the silo, a plurality of forward conveying belts and reverse conveying belts are mounted in the silo, a pug inlet pipe is mounted at the top of the silo, the bottom of the silo is connected with the hot air input pipe, and the exhaust pipe is mounted at the top of the silo; the pug outlet is communicated with the pug inlet pipe through a pug conveying pipe, a discharging port of the caking device is located over the drying kiln inlet conveying belt, and a hot air input pipe of the caking device is communicated with a smoke exhaust pipe of the drying kiln.

Description

Technical Field

[0001] The utility model relates to a continuous dehydration and drying device for red mud, belonging to the technical field of industrial solid waste recycling, and specifically relates to an efficient recycling device for red mud discharged from alumina production. Background Art

[0002] A variety of industrial solid wastes will be generated during industrial production activities, such as ceramic waste residues, perlite tailings, iron ore tailings, red mud, coal gangue, etc. With the development of industrial production, the quantity of industrial waste is increasing day by day. Industrial waste is huge in quantity, diverse in types and complex in composition, making it quite difficult to handle. Industrial waste is mainly stockpiled passively, and some harmful industrial solid wastes are disposed of by methods such as landfill, incineration, chemical conversion, and microbial treatment. Some are dumped into the ocean, causing ecological damage.

[0003] Red mud is an industrial solid waste discharged during the extraction of alumina in the aluminum industry. Because it contains a large amount of iron oxide and its appearance is similar to red soil, it is called red mud. Due to different ore grades, production methods and technical levels, about 1.0 - 1.8 tons of red mud will be discharged for every 1 ton of alumina produced. As a major alumina production country in China, with the increasing stockpile of red mud and the environmental pollution it causes, it has become extremely urgent to maximize the resource utilization of red mud.

[0004] Using red mud discharged from alumina production as the main raw material, synergistically utilizing industrial solid wastes such as urban construction waste, mineralized waste, fly ash, and coal gangue as raw materials, and supplemented with foaming agents, etc., foamed ceramics can be made through high-temperature roasting and foaming. Foamed ceramics are a high-tech new environmental protection material that turns waste into treasure, with extremely strong stability and very wide applications in the construction field.

[0005] Before the red mud discharged from alumina production is applied to the production of foamed ceramics, it needs to be effectively dehydrated and dried to facilitate its mixing and homogenization with raw materials and auxiliary materials in a certain proportion during production. The current technical means is to first stack and sun-dry the discharged red mud over a large area until it is dehydrated to a certain extent, and then use a conveyor belt to pass through a drying kiln for drying, which is time-consuming and laborious. Moreover, during the sun-drying and dehydration process, it will cause a certain degree of environmental damage. Therefore, the effective and rapid drying treatment of red mud discharged from alumina production has become an environmental protection problem that production enterprises urgently need to solve. Summary of the Utility Model

[0006] In order to solve one of the above technical defects, the utility model provides a continuous dehydration and drying device for red mud, which can perform continuous and rapid dehydration and drying of red mud, with high efficiency and good effect.

[0007] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A continuous red mud dehydration and drying device, comprising a slurry conveying pipe, a dehydrator, a caking device, a drying kiln, a wastewater treatment tank and a gas source;

[0008] The dehydrator includes an inner cylinder, a top cover and an outer cylinder. The inner cylinder is a cylinder with an open upper end and a mud outlet at the lower end. The top cover is sealed and installed at the upper end of the inner cylinder. An air flow inlet communicating with the inside of the inner cylinder is provided on the top cover, and the air flow inlet is connected to the gas source through a pipe. A slurry inlet communicating with the inside of the inner cylinder is provided at the top of the inner cylinder, and the slurry inlet is connected to the slurry conveying pipe. An outer cylinder is sleeved on the outer wall of the lower part of the inner cylinder. The upper and lower ends of the outer cylinder are hermetically connected to the outer wall of the inner cylinder, so that a water drainage cavity is formed between the outer cylinder and the inner cylinder. A pressure relief pipe for communicating the water drainage cavity with the outside is installed at the top of the outer cylinder. A drain pipe is provided at the bottom of the outer cylinder, and a solenoid valve is installed on the pressure relief pipe. The cylinder body of the inner cylinder located inside the outer cylinder is made of a water filtering plate material;

[0009] The caking device includes a bin cylinder, a forward conveyor belt, a reverse conveyor belt, a hot gas inlet pipe and an exhaust pipe. The bin cylinder is a cuboid-shaped sealed bin body with a frustum funnel at its lower part. The bottom end of the frustum funnel is a blanking port. A plurality of forward conveyor belts and reverse conveyor belts are installed inside the bin cylinder. The forward conveyor belts and the reverse conveyor belts are arranged alternately from top to bottom. The conveying directions of the forward conveyor belts and the reverse conveyor belts are opposite. The output end of the forward conveyor belt is directly above the input end of the reverse conveyor belt below it. The output end of the reverse conveyor belt is directly above the input end of the forward conveyor belt below it. A mud inlet pipe is installed at the top of the bin cylinder. The pipe outlet of the mud inlet pipe located inside the bin cylinder is directly above the input end of the uppermost forward conveyor belt. The bottom of the bin cylinder is connected with a hot gas inlet pipe. An exhaust pipe is installed at the top of the bin cylinder;

[0010] The mud outlet is communicated with the mud inlet pipe through a mud conveying pipe. The blanking port of the caking device is directly above the inlet conveyor belt of the drying kiln. The hot gas inlet pipe of the caking device is communicated with the flue gas discharge pipe at the top end of the drying kiln. The drain pipe is connected to the wastewater treatment tank through a pipe.

[0011] A plurality of dehydrators are arranged in parallel between the slurry conveying pipe and the caking device. The slurry inlet of each dehydrator is connected to the slurry conveying pipe through a pipe and a solenoid valve is provided on this pipe. The mud outlet of each dehydrator is communicated with the mud conveying pipe through a pipe and a solenoid valve is provided on this pipe. The air flow inlet of each dehydrator is connected to the gas source through a pipe and a solenoid valve is provided on this pipe. The drain pipe of each dehydrator is connected to the wastewater treatment tank through a pipe and a solenoid valve is provided on this pipe.

[0012] A slurry storage tank is connected in parallel to the slurry delivery pipe. The upper part of the slurry storage tank is connected to the slurry delivery pipe through a slurry inlet pipe, and the bottom of the slurry storage tank is connected to the slurry delivery pipe through a slurry outlet pipe. Solenoid valves are provided on both the slurry inlet pipe and the slurry outlet pipe.

[0013] An exhaust gas processor is installed on the exhaust pipe of the agglomerator.

[0014] A cutting mechanism is installed at the top of the silo. The cutting mechanism includes a cylinder and a cutter. The cylinder block is fixed on the silo. The piston rod of the cylinder is vertically downward, and a cutter is fixed at the end of the piston rod. The cutter is horizontally arranged directly above the middle of the uppermost forward conveyor belt.

[0015] An arc-shaped long groove is provided at the center of the uppermost forward conveyor belt, and the pipe outlet of the mud inlet pipe is located directly above the arc-shaped long groove. The bottom edge of the cutter is arc-shaped and matches the bottom of the arc-shaped long groove.

[0016] A flue gas impurity filter is installed on the hot gas input pipe of the agglomerator.

[0017] A gravity valve is installed at the material discharge opening of the agglomerator.

[0018] By using the red mud continuous dehydration and drying equipment provided by the present utility model, the red mud slurry discharged from alumina production is efficiently dehydrated and dried, without the need for sun drying, with rapid recovery, high efficiency, and improved production environmental protection of the enterprise.

[0019] Other features and advantages of the present utility model will be described in the subsequent specification, and part of them will become obvious from the specification or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the content pointed out in the written specification, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0021] Figure 1 is a structural schematic diagram of the present utility model;

[0022] Figure 2 is an internal structural schematic diagram of the dehydrator in the present utility model;

[0023] Figure 3 is an internal structural schematic diagram of the agglomerator in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] like Figure 1 As shown, the utility model is a red mud continuous dehydration and drying device, comprising a slurry conveying pipe 1, a dehydrator 2, an agglomerator 3, a drying kiln 4, a wastewater treatment tank 5 and an air source 7.

[0026] like Figure 2 As shown, the dehydrator 2 includes an inner cylinder 21, a top cover 22 and an outer cylinder 23. The inner cylinder 21 is a cylinder with an open upper end and a mud material outlet 24 at the lower end. The top cover 22 is installed at the upper end of the inner cylinder 21. The top cover 22 is provided with an air flow inlet 25 connected to the interior of the inner cylinder 21, and the air flow inlet 25 is connected to the air source 7 through a pipeline. The top of the inner cylinder 21 is provided with a slurry inlet 26 connected to the interior thereof, and the slurry inlet 26 is connected to the slurry delivery pipe 1. The inner cylinder 2 An outer cylinder 23 is mounted on the lower outer wall of the inner cylinder 21. The upper and lower ends of the outer cylinder 23 are sealed with the outer wall of the inner cylinder 21, so that a drain cavity 27 is formed between the outer cylinder 23 and the inner cylinder 21. A pressure relief pipe 28 for connecting the drain cavity 27 with the outside is installed on the top of the outer cylinder 23. A drainage pipe 29 is arranged at the bottom of the outer cylinder 23, and a solenoid valve is installed on the pressure relief pipe 28. The cylinder body of the inner cylinder 21 located inside the outer cylinder 23 is made of a water filter plate material. A monitoring valve is arranged on the upper inner part of the inner cylinder 21. The water level monitor for the slurry filling height and the pressure monitor for detecting the pressure in the chamber, the size of the water filter plate, and the setting height of the water level monitor are specifically set according to the water content of the red mud and the set dehydration degree. The purpose is that when the water level monitor detects that the red mud fills the inner tube 21 (filling means reaching the installation height of the water level monitor), it is fed back to the system for processing, and the slurry inlet 26 is closed. The gas source 7 can pass gas into the inner tube 21 to increase its internal pressure. Under the action of pressure, the water in the red mud is filtered into the drain clip chamber 27 through the water filter plate at the lower part of the inner tube 21 and then discharged through the drain pipe 29. When the red mud slurry is dehydrated to a certain extent, the slurry water level line is lower than the upper end of the water filter plate, the pressure in the inner tube 21 drops, and the pressure monitor is fed back to the system. The system can close the solenoid valve on the pressure relief pipe 28 and continue to deliver pressure to discharge the mud through the mud outlet 24 (the dehydration in the dehydrator 2 is to remove the water to a certain proportion, but because the red mud still contains a certain amount of water, it still has a certain fluidity).

[0027] like Figure 3As shown, the agglomerator 3 includes a silo 31, a forward conveyor belt 32, a reverse conveyor belt 33, a hot air input pipe 35 and an exhaust pipe 36. The silo 31 is a sealed silo in the shape of a rectangular cylinder and a prism funnel is provided at the bottom thereof. The bottom end of the prism funnel is a material drop opening 37. The material drop opening 37 of the agglomerator 3 is installed with a gravity valve. A plurality of forward conveyor belts 32 and reverse conveyor belts 33 are installed inside the silo 31. The forward conveyor belts 32 and the reverse conveyor belts 33 are staggered from top to bottom. The conveying directions of the forward conveyor belts 32 and the reverse conveyor belts 33 are opposite. The output end of the forward conveyor belt 32 is located directly above the input end of the reverse conveyor belt 33 below it, and the output end of the reverse conveyor belt 33 is located directly above the input end of the forward conveyor belt 32 below it. A mud material inlet pipe 38 is installed on the top of the silo 31. The mud material inlet pipe 38 is located at the pipe outlet of the silo 31 corresponding to the topmost forward conveyor belt 3 2, a hot air input pipe 35 is connected to the bottom of the silo 31, and an exhaust pipe 36 is installed on the top of the silo 31; the mud falls from the mud inlet pipe 38 to the input end of the uppermost forward conveyor belt 32, and is driven to move by the forward conveyor belt 32, while the hot air input pipe 35 continuously inputs hot air into the silo 31. In the hot air environment inside the silo 31, the mud surface is dried, and when it is transported to the output end of the forward conveyor belt 32, it falls to the reverse conveyor belt 33 below, and at the same time, the mud will be broken into blocks, and the front and back sides of the mud will turn over (achieved by setting parameters such as the specific upper and lower spacing of the conveyor belt and the conveying speed of the conveyor belt), and the back side of the mud will continue to be hot-dried until block-shaped mud blocks fall to the bottom of the silo 31, and then the gravity valve is opened after a certain amount of mud blocks are collected, and then the mud blocks fall from the drop-out port 37, and the gravity valve can effectively achieve the sealing inside the silo 31. The structure of the gravity valve is prior art, and the specific structure of the gravity valve is not described in detail in this application.

[0028] The mud outlet 24 is connected with the mud inlet pipe 38 through the mud conveying pipe 9, and the mud is delivered into the agglomerator 3 through the mud conveying pipe 9 under continuous pressure delivery in the inner tube 21. The drop port 37 of the agglomerator 3 is located directly above the inlet conveyor belt of the drying kiln 4, and the mud blocks fall directly on the conveyor belt of the drying kiln 4, and then are delivered to the drying kiln 4 for complete drying. The hot air input pipe 35 of the agglomerator 3 is connected with the flue gas exhaust pipe at the top of the drying kiln 4, and the hot flue gas of the drying kiln is delivered into the agglomerator 3 to dry the surface of the mud. The drain pipe 29 is connected with the wastewater treatment tank 5 through a pipeline. The water in the red mud contains a large amount of pollutants, which need to be treated before discharge or water resources reuse.

[0029] The conveyor belt used in the drying kiln 4 of the present invention should be made of high temperature resistant material, and its inner structure is a plate surface that can receive mud blocks and transport them. The setting height and length of the conveyor belt are set according to actual production requirements.

[0030] A plurality of dehydrators 2 are arranged in parallel between the slurry delivery pipe 1 and the agglomerator 3. The slurry inlet 26 of each dehydrator 2 is connected to the slurry delivery pipe 1 through a pipeline, and a solenoid valve is provided on this pipeline. The mud outlet 24 of each dehydrator 2 is connected to the mud delivery pipe 9 through a pipeline, and a solenoid valve is provided on this pipeline. The air flow inlet 25 of each dehydrator 2 is connected to the gas source 7 through a pipeline, and a solenoid valve is provided on this pipeline. The drain pipe 29 of each dehydrator 2 is connected to the wastewater treatment tank 5 through a pipeline, and a solenoid valve is provided on this pipeline. The dehydration process is relatively time-consuming. The multiple dehydrators 2 are used in parallel, which can effectively improve the efficiency of red mud slurry dehydration and realize continuous drying of a large amount of red mud dehydration.

[0031] A slurry storage tank 8 is connected in parallel to the slurry delivery pipe 1. The upper part of the slurry storage tank 8 is connected to the slurry delivery pipe 1 through a slurry inlet pipe 81, and the bottom of the slurry storage tank 8 is connected to the slurry delivery pipe 1 through a slurry outlet pipe 82. Solenoid valves are provided on both the slurry inlet pipe 81 and the slurry outlet pipe 82 to avoid the problem that the working speed of the dehydrator in the system equipment cannot catch up with the excessive discharge of red mud. A stirring device, such as a stirring shaft blade structure or an air cannon stirring device, should be provided in the slurry storage tank 8 to prevent the red mud from settling and unable to be smoothly discharged through the slurry outlet pipe 82.

[0032] An exhaust gas processor 6 is installed on the exhaust pipe 36 of the agglomerator 3 to treat the discharged exhaust gas containing water vapor before discharging to avoid air pollution.

[0033] A cutting mechanism 34 is installed on the top of the silo 31. The cutting mechanism 34 includes a cylinder and a cutter. The cylinder block is fixed on the silo 31. The piston rod of the cylinder is vertically downward, and a cutter is fixed at the end of the piston rod. The cutter is horizontally arranged directly above the middle of the top positive conveyor belt 32. The cutter can cut the mud into a certain length in advance under the drive of the telescopic movement of the piston rod of the cylinder, so that the size of the mud agglomerates remains basically the same.

[0034] An arc-shaped long groove is provided at the center of the top positive conveyor belt 32, and the pipe outlet of the mud inlet pipe 38 is located directly above the arc-shaped long groove. The bottom edge of the cutter is arc-shaped and matches the bottom of the arc-shaped long groove. During use, there is a certain height interval between the bottom end of the cutter and the bottom surface of the arc-shaped long groove. When the mud passes through, the mud can be scraped flat, thereby controlling the forming thickness of the mud block. The arc-shaped long groove can make the formed mud block into an arched sheet shape, and when it falls onto the conveyor belt of the drying kiln 4, there is a certain gap between the bottom surface and the surface of the conveyor belt, improving the drying effect in the drying kiln.

[0035] A flue gas impurity filter 39 is installed on the hot gas input pipe 35 of the agglomerator 3 to prevent flue gas impurities from mixing into the red mud blocks.

[0036] Working process: Figure 1Taking the shown equipment system as an example, three dehydrators 2 are arranged side by side. The red mud slurry discharged from alumina production is first sent into the 1# dehydrator through the slurry conveying pipe 1 until the water level monitor in the dehydrator feeds back that the red mud slurry fills the inner cylinder 21 to the set height. Then the slurry inlet 26 of the 1# dehydrator is closed, and the slurry inlet of the 2# dehydrator is opened. The slurry continues to be poured into the 2# dehydrator. At this time, the gas source 7 can introduce gas into the inner cylinder 21 of the 1# dehydrator to increase the internal pressure. Under the action of pressure, the water in the red mud filters through the water filter plate at the lower part of the inner cylinder 21 into the water drainage cavity 27 and then is discharged through the drain pipe 29. When the red mud slurry is dehydrated to a certain extent, the slurry water level line is lower than the upper end of the water filter plate. The gas passes through the water filter plate into the water drainage cavity 27 and then is discharged from the pressure relief pipe 28. The pressure inside the inner cylinder 21 drops. The pressure monitor feeds back to the system, and the system can close the solenoid valve on the pressure relief pipe 28 and continue to convey pressure to discharge the mud through the mud outlet 24. The mud is sent into the agglomerator 3 through the mud conveying pipe 9 and falls on the input end of the forward conveyor belt 32 at the top. Driven by the forward conveyor belt 32, it moves. The hot gas input pipe 35 continuously inputs hot gas into the silo 31. In the hot gas environment inside the silo 31, the surface of the mud is dried. When it is conveyed to the output end of the forward conveyor belt 32, it falls onto the lower reverse conveyor belt 33. At the same time, the mud will break into pieces, and the front and back sides of the mud will turn over to continue drying the back side of the mud with hot gas until the lumpy mud blocks fall to the bottom of the silo 31. Then, after a certain amount of mud blocks are collected, the gravity valve is opened, and the mud blocks fall from the material dropping port 37 onto the conveyor belt of the drying kiln 4 and are finally sent into the drying kiln 4 for complete drying.

[0037] In the present utility model, the discharged water and the hot gas containing water vapor need to be treated before being discharged or recycled. The specific treatment methods and treatment equipment are prior arts and will not be described in detail in this application.

[0038] In the present utility model, a solenoid valve is provided on each pipeline. In particular, the solenoid valves on the pipelines connected to the dehydrator 2 are all valves with the function of sealing air, which cooperate to control the gas pressure in the inner cylinder 21 to achieve the functions of water drainage and mud pushing. And all valves are controlled by the control system of the present utility model and are designed and used according to actual needs, which will not be described in detail in this application.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0041] In the present utility model, unless otherwise clearly specified and limited, the terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] Although the preferred embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present utility model.

[0043] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these changes and modifications.

Claims

1. A continuous red mud dehydration and drying device, characterized in that: It includes a pulp delivery pipe (1), a dehydrator (2), an agglomerator (3), a drying kiln (4), a wastewater treatment tank (5) and a gas source (7); The dehydrator (2) includes an inner cylinder (21), a top cover (22) and an outer cylinder (23). The inner cylinder (21) is a cylinder with an open upper end and a mud outlet (24) at the lower end. The top cover (22) is sealed and installed at the upper end of the inner cylinder (21). An air flow inlet (25) communicating with the inside of the inner cylinder (21) is provided on the top cover (22), and the air flow inlet (25) is connected to the gas source (7) through a pipeline. A pulp inlet (26) communicating with the inside of the inner cylinder (21) is provided at the top of the inner cylinder (21), and the pulp inlet (26) is connected to the pulp delivery pipe (1). An outer cylinder (23) is sleeved on the lower outer wall of the inner cylinder (21). The upper and lower ends of the outer cylinder (23) are hermetically connected to the outer wall of the inner cylinder (21), so as to form a drainage cavity (27) between the outer cylinder (23) and the inner cylinder (21). A pressure relief pipe (28) for communicating the drainage cavity (27) with the outside is installed at the top of the outer cylinder (23). A drain pipe (29) is provided at the bottom of the outer cylinder (23), and an electromagnetic valve is installed on the pressure relief pipe (28). The cylinder of the inner cylinder (21) located inside the outer cylinder (23) is made of a water filter plate material; The agglomerator (3) includes a bin cylinder (31), a forward conveyor belt (32), a reverse conveyor belt (33), a hot gas input pipe (35) and an exhaust pipe (36). The bin cylinder (31) is a cuboid-shaped sealed bin body with a frustum funnel at the lower part, and the bottom end of the frustum funnel is a material outlet (37). A plurality of forward conveyor belts (32) and reverse conveyor belts (33) are installed inside the bin cylinder (31). The forward conveyor belts (32) and the reverse conveyor belts (33) are arranged alternately from top to bottom, and the conveying directions of the forward conveyor belts (32) and the reverse conveyor belts (33) are opposite. The output end of the forward conveyor belt (32) is directly above the input end of the reverse conveyor belt (33) below it, and the output end of the reverse conveyor belt (33) is directly above the input end of the forward conveyor belt (32) below it. A mud inlet pipe (38) is installed at the top of the bin cylinder (31), and the pipe outlet of the mud inlet pipe (38) located inside the bin cylinder (31) is directly above the input end of the uppermost forward conveyor belt (32). The bottom of the bin cylinder (31) is connected to a hot gas input pipe (35), and an exhaust pipe (36) is installed at the top of the bin cylinder (31); The mud outlet (24) is communicated with the mud inlet pipe (38) through a mud conveying pipe (9). The material outlet (37) of the agglomerator (3) is directly above the inlet conveyor belt of the drying kiln (4). The hot gas input pipe (35) of the agglomerator (3) is communicated with the flue gas discharge pipe at the top end of the drying kiln (4). The drain pipe (29) is connected to the wastewater treatment tank (5) through a pipeline.

2. The continuous red mud dehydration and drying equipment according to claim 1, characterized in that: A plurality of dehydrators (2) are arranged in parallel between the slurry conveying pipe (1) and the caking machine (3). The slurry inlet (26) of each dehydrator (2) is connected to the slurry conveying pipe (1) through a pipeline, and a solenoid valve is provided on this pipeline. The mud outlet (24) of each dehydrator (2) is communicated with the mud conveying pipe (9) through a pipeline, and a solenoid valve is provided on this pipeline. The air flow inlet (25) of each dehydrator (2) is communicated with the gas source (7) through a pipeline, and a solenoid valve is provided on this pipeline. The drain pipe (29) of each dehydrator (2) is connected to the wastewater treatment tank (5) through a pipeline, and a solenoid valve is provided on this pipeline.

3. The continuous red mud dehydration and drying equipment according to claim 1 or 2, characterized in that: A slurry storage tank (8) is connected in parallel to the slurry conveying pipe (1). The upper part of the slurry storage tank (8) is connected to the slurry conveying pipe (1) through a slurry inlet pipe (81), and the bottom of the slurry storage tank (8) is connected to the slurry conveying pipe (1) through a slurry outlet pipe (82). Solenoid valves are provided on both the slurry inlet pipe (81) and the slurry outlet pipe (82).

4. A continuous red mud dehydration and drying device according to claim 1 or 2, characterized in that: An exhaust gas processor (6) is installed on the exhaust pipe (36) of the caking machine (3).

5. A continuous red mud dehydration and drying device according to claim 1 or 2, characterized in that: A cutting mechanism (34) is installed on the top of the bin cylinder (31). The cutting mechanism (34) includes a cylinder and a cutting knife. The cylinder body of the cylinder is fixed on the bin cylinder (31), the piston rod of the cylinder is vertically downward, and a cutting knife is fixed to the end of the piston rod. The cutting knife is horizontally arranged directly above the middle of the uppermost positive conveyor belt (32).

6. The continuous red mud dehydration and drying equipment according to claim 5, characterized in that: An arc-shaped long groove is provided at the center of the uppermost positive conveyor belt (32), and the pipe outlet of the mud inlet pipe (38) is located directly above the arc-shaped long groove. The bottom edge of the cutting knife is arc-shaped and matches the bottom of the arc-shaped long groove.

7. A continuous red mud dehydration and drying device according to claim 1 or 2, characterized in that: A flue gas impurity filter (39) is installed on the hot gas input pipe (35) of the caking machine (3).

8. A continuous red mud dehydration and drying device according to claim 1 or 2, characterized in that: A gravity valve is installed at the material discharge port (37) of the caking machine (3).

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