Red mud washing water heating device

Abstract

The utility model relates to the technical field of red mud treatment, and provides a red mud washing water heating device which is used for conveying heated washing water into a settling tank and comprises a shell, and a first cavity is formed in the shell; the partition plate is arranged in the shell and divides the first cavity into a second cavity and a third cavity; the washing water sleeve is arranged on the partition plate and penetrates through the shell, the shell is further provided with a secondary steam inlet and a new steam inlet which are located above the washing water sleeve and located on the two sides of the partition plate, the secondary steam inlet is communicated with the second cavity, and the new steam inlet is communicated with the third cavity. By means of the technical scheme, the technical problem that the requirement for the washing water temperature in the sedimentation process cannot be met after heat exchange of the washing water sleeve in the related technology is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of red mud treatment technology, and more specifically, to a red mud washing water heating device. Background Technology

[0002] Natural bauxite has a complex composition. In the causticization production of alumina, after the leaching process, the target product, sodium aluminate solution, and red mud containing various impurities such as silica and iron oxide are formed. To achieve higher causticization yields and production profits, industrial production often involves settling and recycling of the red mud to recover and extract the alumina components, thereby improving the utilization rate of the bauxite. The separation and settling of red mud occurs in a settling tank. Generally, the higher the temperature of the settling tank, the faster the settling and separation speed, and the better the separation effect.

[0003] In existing technologies, to maximize energy utilization, the secondary steam from the final stage of the leaching unit is often used to heat the wash water jacket. The washed water after heat exchange is then sent to the settling process. However, in actual production, there is often a problem that the amount of secondary steam from the final stage of the leaching unit is insufficient, and the temperature of the wash water after heat exchange in the wash water jacket cannot meet the requirements of the settling process. The water required for red mud washing comes from various places, and the multiple and long paths will inevitably increase the contact area between the incoming water and the low-temperature air, resulting in heat loss of the incoming water and an increase in the energy cost required to raise the temperature to a suitable settling temperature.

[0004] Therefore, it is necessary to improve the existing washing water jacket heating method to further increase the washing water temperature while reducing heat loss. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a red mud washing water heating device, which solves the technical problem in the related art that the washing water temperature cannot be reached after the heat exchange of the washing water sleeve in the sedimentation process.

[0006] At least one embodiment of this disclosure provides a red mud washing water heating device for conveying heated washing water into a settling tank, the heating device comprising:

[0007] The outer shell has a first cavity inside;

[0008] A partition, disposed within the outer casing, divides the first cavity into a second cavity and a third cavity;

[0009] A washing water sleeve is disposed on the partition plate and extends through the outer shell. The outer shell also has a secondary steam inlet and a new steam inlet located above the washing water sleeve and on both sides of the partition plate. The secondary steam inlet communicates with the second cavity, and the new steam inlet communicates with the third cavity.

[0010] For example, in at least one embodiment of the red mud washing water heating device provided in this disclosure, the outer shell further has a first condensate drain outlet and a second condensate drain outlet located below the washing water sleeve and on both sides of the partition. The first condensate drain outlet is connected to the second cavity, and the second condensate drain outlet is connected to the third cavity.

[0011] For example, at least one embodiment of the red mud washing water heating device provided in this disclosure further includes:

[0012] A first scraper is movable relative to the washing sleeve and located in the second cavity, abutting against the bottom of the washing sleeve. The first scraper is configured to scrape off the condensate that has accumulated at the bottom of the washing sleeve after it moves.

[0013] The second scraper is movable relative to the washing sleeve and is located in the third cavity, abutting against the bottom of the washing sleeve. The moving direction of the second scraper is parallel to the moving direction of the first scraper. The second scraper is configured to scrape off the condensate that has accumulated at the bottom of the washing sleeve after it moves.

[0014] For example, in at least one embodiment of the red mud washing water heating device provided in this disclosure, the partition has a first groove and a first opening that are interconnected, the first opening being in communication with the second cavity, and the heating device further includes:

[0015] A movable component is vertically disposed within the first groove, and the moving direction of the movable component is perpendicular to the moving direction of the first scraper.

[0016] A first mounting plate is disposed on the movable member and located at the first opening;

[0017] The first link has one end hinged to the first scraper and the other end hinged to the first mounting plate. The movable component is configured to move and drive the first scraper to move via the first link.

[0018] For example, in at least one embodiment of the red mud washing water heating device provided in this disclosure, the partition further has a second opening communicating with the first groove, the second opening communicating with the third cavity, and the heating device further includes:

[0019] The second mounting plate is symmetrically arranged with respect to the movable part relative to the first mounting plate, and the second mounting plate is located at the second opening;

[0020] The second link is hinged at one end to the second scraper and at the other end to the second mounting plate. The movable part is configured to move and drive the second scraper to move via the second link.

[0021] A sealing plate is movably disposed within the first groove, located on one side of the movable member and completely covering the first opening and / or the second opening. The moving direction of the sealing plate is parallel to the moving direction of the movable member. The sealing plate has a through hole communicating with the first opening and / or the second opening to avoid the first mounting plate and / or the second mounting plate. The sealing plate is configured to move with the movable member to block the communication between the first opening and / or the second opening and the first groove, and to prevent steam exchange between the second cavity and the third cavity.

[0022] For example, at least one embodiment of the red mud washing water heating device provided in this disclosure further includes:

[0023] The first elastic element has one end acting on the inner wall of the first groove and the other end acting on the sealing plate, and is used to provide the force for the sealing plate to return to its original position after movement.

[0024] For example, at least one embodiment of the red mud washing water heating device provided in this disclosure further includes:

[0025] A linear drive element is disposed on the housing and is drivenly connected to the moving element.

[0026] For example, at least one embodiment of the red mud washing water heating device provided in this disclosure further includes:

[0027] A pressing block is movably disposed within the first groove. The moving direction of the pressing block is parallel to the moving direction of the moving member. The pressing block is located above the moving member. The pressing block is configured to press down after moving and drive the moving member to move downward.

[0028] The second elastic element has one end acting on the inner wall of the first groove and the other end acting on the moving element, and is used to provide the moving element with an upward force.

[0029] For example, in at least one embodiment of the red mud washing water heating device provided in this disclosure, the lower pressing block has a slot, and the heating device further includes:

[0030] A threaded rod is threaded onto the housing. The bottom of the threaded rod has a retaining part located within the retaining groove. The retaining part is free to rotate relative to the retaining groove. The threaded rod is configured to drive the lower pressure block to move after rotation.

[0031] The handwheel is located at the top of the threaded rod.

[0032] For example, at least one embodiment of the red mud washing water heating device provided in this disclosure further includes:

[0033] An upper limit stop is provided on the threaded rod, located outside the housing and below the handwheel, to limit the downward displacement of the threaded rod;

[0034] A lower limit component is disposed on the threaded rod, located within the first groove and above the lower pressure block, and is used to limit the upward displacement of the threaded rod.

[0035] The beneficial effects of the embodiments disclosed herein are as follows:

[0036] In this disclosure, a stable segmented heating technology using a wash water jacket is employed to introduce fresh steam to heat the wash water. This two-stage heating technology fully meets the high temperature requirements for red mud settling. Simultaneously, a high-precision temperature and pressure sensor is used to monitor the operational stability of the wash water jacket system in real time, preventing slurry hydrolysis in the settling tank, ensuring the stable performance of the settling tank, and improving the causticization yield of alumina. By designing a pre-combination pipeline for the incoming water, heat loss caused by the high specific surface area is reduced, and the direction of heat flow from the self-evaporator is fully guided to achieve self-heating of the combined incoming water. This reduces the subsequent heat energy cost required to heat the water to the high temperature required for the settling tank and improves production efficiency. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0038] Figure 1 This is a schematic diagram of the heating device and settling tank in one embodiment of the present disclosure;

[0039] Figure 2 for Figure 1 A schematic diagram of the heating device in the embodiment;

[0040] Figure 3 This is a schematic diagram of the internal structure of the heating device in yet another embodiment of this disclosure;

[0041] Figure 4 for Figure 3 A schematic diagram of the partition structure in the embodiment;

[0042] Figure 5 for Figure 3 A schematic diagram of the structure of the lower pressure block and the threaded rod in the embodiment;

[0043] In the diagram: 1. Settling tank; 2. Outer shell; 3. First cavity; 4. Partition; 5. Second cavity; 6. Third cavity; 7. Wash water sleeve; 8. Secondary steam inlet; 9. New steam inlet; 10. First condensate outlet; 11. Second condensate outlet; 12. First scraper; 13. Second scraper; 14. First groove; 15. First opening; 16. Moving part; 17. First mounting plate; 18. First connecting rod; 19. Second opening; 20. Second mounting plate; 21. Second connecting rod; 22. Sealing plate; 23. Through hole; 24. First elastic element; 25. Linear drive element; 26. Lower pressure block; 27. Second elastic element; 28. Slot; 29. ​​Threaded rod; 30. Locking part; 31. Handwheel; 32. Upper limit element; 33. Lower limit element. Detailed Implementation

[0044] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0045] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0046] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0047] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0049] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] like Figures 1-2 As shown, a red mud washing water heating device according to an embodiment of the present disclosure is used to deliver heated washing water to a settling tank 1. The heating device includes a shell 2 and a partition 4, wherein the shell 2 has a first cavity 3 inside; the partition 4 is disposed inside the shell 2, dividing the first cavity 3 into a second cavity 5 and a third cavity 6; a washing water sleeve 7 is disposed on the partition 4 and penetrates the shell 2; the shell 2 also has a secondary steam inlet 8 and a new steam inlet 9 located above the washing water sleeve 7 and on both sides of the partition 4, the secondary steam inlet 8 communicating with the second cavity 5, and the new steam inlet 9 communicating with the third cavity 6.

[0051] In some examples, to address the technical problem that the washing water sleeve 7 fails to reach the required washing water temperature for the settling process after heat exchange, the washing water sleeve 7 is divided into a preheating section and a heating section. The first five sleeves are designated as the preheating section, located in the second chamber 5, and heated with secondary steam. The last three sleeves are designated as the heating section, located in the third chamber 6, and heated with fresh steam. This sequential heating using secondary steam and fresh steam maintains a stable high temperature for the washing water, effectively solving the low-temperature problem caused by insufficient secondary steam in the original leaching unit and ensuring stable and normal system operation. Furthermore, the pipeline structure is improved by pre-collecting the circulating wastewater, condensate, and other incoming water required for red mud washing into the washing water heating device, reducing long-path heat loss. The collected water is then processed according to the production process. The condensate from the self-evaporator is heated, including secondary steam from the final-stage condensate self-evaporator and the final-stage slurry self-evaporator. The self-evaporator mainly consists of a heating chamber and an evaporation chamber. Heating in the heating chamber promotes boiling and vaporization. The steam in the heating chamber carries a large amount of liquid droplets. After rising to the evaporation chamber, the steam condenses and separates from the liquid droplets. During the condensation process, the gas phase is converted into a condensed liquid phase, releasing heat. The low-temperature incoming water is fully heated in the wash water heater device. The heating temperature of the incoming water is adjusted by regulating the amount of secondary steam. The amount of secondary steam is adjusted by regulating the opening of the automatic valve to change the feed and discharge of the first few stages of self-evaporator and the final-stage slurry self-evaporator, thereby achieving temperature regulation. Ultimately, the required temperature for red mud washing water is reached, realizing the rational reuse of heat generated in the production process, reducing energy consumption costs, and increasing production efficiency.

[0052] In addition, the electric control valve for the new steam inlet flow rate is connected to the existing DCS remote control system to control the steam flow rate, ensuring the timeliness and accuracy of the adjustment. Existing high-precision temperature and pressure sensors are used to monitor the temperature and pressure stability of the washing water sleeve 7 system in real time. The opening and closing degree of the electric regulating valve is controlled according to the strength of the temperature and pressure signals received by the sensors, ensuring the accuracy and timeliness of temperature regulation and improving the stability of the separation and settling process in the settling tank.

[0053] For example, such as Figures 1-2 As shown, the advantages of this design are that, through the stable segmented heating technology of the wash water sleeve 7, new steam is introduced to heat the wash water, and the two-stage heating technology fully meets the high temperature requirements of red mud settling. At the same time, a high-precision temperature and pressure sensor is used to monitor the stable operation of the wash water sleeve 7 system in real time, avoiding hydrolysis of the slurry in the settling tank, ensuring the performance stability of the settling tank, and improving the causticization yield of alumina. Through the design of the pre-merging pipeline of the incoming water, the heat loss caused by the high specific surface area is reduced, and the direction of heat energy flow of the self-evaporator is fully guided to achieve self-heating of the merged incoming water, reducing the subsequent heat energy cost of heating to the high temperature required for the settling tank and improving production efficiency.

[0054] like Figures 3-5 As shown, it illustrates a red mud washing water heating device in another embodiment of the present disclosure. The outer shell 2 also has a first condensate outlet 10 and a second condensate outlet 11 located below the washing sleeve 7 and on both sides of the partition 4. The first condensate outlet 10 is connected to the second cavity 5, and the second condensate outlet 11 is connected to the third cavity 6.

[0055] In some examples, such as those mentioned earlier, when the secondary steam from the final stage flash evaporation of the dissolution unit enters the second chamber 5 from the secondary steam inlet 8 to heat the wash water in the wash water sleeve 7, the secondary steam gradually cools and condenses into condensate as heat is transferred. This condensate accumulates in the second chamber 5 and flows downwards due to gravity. At this time, the first condensate outlet 10, located below the wash water sleeve 7 and on one side of the baffle 4, plays a role, acting like a "drain valve" to promptly discharge the condensate in the second chamber 5. Similarly, when new steam enters the third chamber 6 from the new steam inlet 9 to further heat the wash water, the new steam also condenses into water after releasing heat. This condensate accumulates in the third chamber 6 and is discharged through the second condensate outlet 11, located below the wash water sleeve 7 and on the other side of the baffle 4.

[0056] For example, during a continuous day of production, the secondary steam from the final stage flash evaporation of the dissolution unit is continuously supplied, generating approximately 500 liters of condensate per hour. This condensate is smoothly discharged from the device through the first condensate outlet 10, preventing it from accumulating in the second chamber 5 and affecting the heating effect of the secondary steam on the wash water. The fresh steam generates approximately 300 liters of condensate per hour, which is promptly discharged through the second condensate outlet 11, ensuring the normal operating environment of the third chamber 6 and enabling the fresh steam to continuously and effectively heat the wash water.

[0057] For example, such as Figures 3-5 As shown, the advantages of this design are: First, it ensures heating efficiency: timely drainage of condensate prevents its accumulation within the cavity. Excessive condensate buildup occupies steam space, reducing the contact area between steam and the washing sleeve 7, thus lowering heating efficiency. The first condensate drain 10 and the second condensate drain 11 quickly drain condensate, ensuring constant contact between steam and the washing sleeve 7, guaranteeing continuous and efficient heating of the washing water, maintaining its temperature stability, and thus ensuring effective red mud settling and separation. Second, it extends equipment lifespan: prolonged condensate retention within the cavity can cause corrosion. This is because condensate may contain impurities, which, in prolonged contact with the inner wall, accelerate equipment damage. Timely drainage reduces this corrosion risk, extending the lifespan of components such as the outer shell 2 and the washing sleeve 7, reducing maintenance costs and replacement frequency, and improving production continuity and stability. Third, it optimizes energy utilization: effective condensate drainage allows steam to release heat more efficiently within the cavity, improving steam thermal efficiency. This avoids the situation where steam heat cannot be fully transferred to the wash water due to condensation accumulation, allowing for more rational use of energy. While meeting the heating needs of the wash water, it reduces energy waste and conforms to the production concept of energy conservation and emission reduction.

[0058] like Figures 3-5 As shown, a red mud washing water heating device is illustrated in another embodiment of this disclosure. The heating device further includes: a first scraper 12, which is movably disposed relative to the washing sleeve 7 and located in the second cavity 5, abutting against the bottom of the washing sleeve 7. The first scraper 12 is configured to scrape off the condensate collected at the bottom of the washing sleeve 7 after it moves; and a second scraper 13, which is movably disposed relative to the washing sleeve 7 and located in the third cavity 6, abutting against the bottom of the washing sleeve 7. The moving direction of the second scraper 13 is parallel to the moving direction of the first scraper 12. The second scraper 13 is configured to scrape off the condensate collected at the bottom of the washing sleeve 7 after it moves.

[0059] In some examples, inside the second chamber 5, the first scraper 12 is close to the bottom of the wash water sleeve 7. It can be driven by a small electric drive mechanism to reciprocate linearly along the bottom of the wash water sleeve 7. When the secondary steam from the final stage of the dissolution unit heats the wash water sleeve 7, the steam condenses into water droplets at the bottom of the wash water sleeve 7 when it encounters cold air. Over time, these water droplets will accumulate to form a large condensate area. Driven by the electric drive mechanism, the first scraper 12 slowly moves along the bottom of the wash water sleeve 7, like a broom, scraping off the condensate accumulated at the bottom. The scraped-off condensate flows down the bottom of the second chamber 5 to the first condensate outlet 10 and is then discharged from the device. In the third chamber 6, the working principle of the second scraper 13 is similar to that of the first scraper 12. It can also be driven by an electric drive mechanism and kept parallel to the moving direction of the first scraper 12. When new steam enters the third chamber 6 to heat the washing sleeve 7, the second scraper 13 will scrape the bottom of the washing sleeve 7 at regular intervals according to the set program.

[0060] For example, during a continuous production process lasting several hours, the first scraper 12 is activated every 10 minutes, with each reciprocating motion lasting 2 minutes. This effectively scrapes off the condensate accumulated at the bottom of the washing sleeve 7, ensuring that excessive condensate buildup at the bottom of the washing sleeve 7 does not affect the heating effect. After the new steam has been heating for 30 minutes, the second scraper 13 is activated, scraping off the condensate accumulated at the bottom of the washing sleeve 7 due to the new steam condensation at the same speed and in the same manner as the first scraper 12. This condensate then flows to the second condensate drain outlet 11 for discharge.

[0061] For example, such as Figures 3-5As shown, the advantages of this design are: enhanced condensate removal effect: the first scraper 12 and the second scraper 13 can actively and effectively scrape off the condensate accumulated at the bottom of the washing sleeve 7. Compared with relying solely on gravity drainage, this greatly improves the condensate removal efficiency, which further ensures sufficient contact between the washing sleeve 7 and the steam, thereby improving heating efficiency and ensuring that the washing water can quickly and stably reach the required temperature to meet the requirements of the red mud settling process. Prevention of localized overheating or undercooling: if too much condensate accumulates at the bottom of the washing sleeve 7, it will obstruct heat transfer in that area, potentially causing localized overheating or undercooling. Overheating may damage the washing sleeve 7, while undercooling will affect the uniformity of washing water heating. The timely removal of condensate by the scrapers avoids this situation, protecting the performance of the washing sleeve 7 and ensuring uniform heating of the washing water within the sleeve, thus improving the quality of washing water heating. Extended equipment lifespan: continuously accumulating condensate may corrode the bottom of the washing sleeve 7, affecting its service life. The regular scraping of the scraper reduces the contact time between condensate and the bottom of the washing sleeve 7, reducing the risk of corrosion and thus extending the service life of the washing sleeve 7 and the entire heating device, reducing equipment maintenance and replacement costs.

[0062] like Figures 3-5 As shown, a red mud washing water heating device is illustrated in another embodiment of this disclosure. The partition 4 has a first groove 14 and a first opening 15 that communicate with each other. The first opening 15 communicates with the second cavity 5. The heating device further includes: a movable member 16 that is vertically movable and disposed in the first groove 14, the moving direction of the movable member 16 being perpendicular to the moving direction of the first scraper 12; a first mounting plate 17 disposed on the movable member 16 and located at the first opening 15; one end of the first connecting rod 18 is hinged to the first scraper 12 and the other end is hinged to the first mounting plate 17. The movable member 16 is configured to move and drive the first scraper 12 to move through the first connecting rod 18 after moving.

[0063] In some examples, when it is necessary to adjust the position of the first scraper 12 or to initiate the operation of scraping off condensate, the moving part 16 is controlled to move vertically within the first groove 14. Assuming the moving part 16 moves upward, the first mounting plate 17 rises along with it. Since the first connecting rod 18 is hinged to the first scraper 12 and the first mounting plate 17 at both ends, the first connecting rod 18 will pull the first scraper 12 along the bottom of the washing sleeve 7, thereby scraping off the condensate accumulated at the bottom of the washing sleeve 7. In actual production scenarios, the movement of the moving part 16 may be flexibly controlled according to different production needs and the accumulation of condensate at the bottom of the washing sleeve 7. If a large amount of condensate is found to have accumulated in a certain area at the bottom of the washing sleeve 7, the moving distance and speed of the moving part 16 can be adjusted to control the scraping frequency and force of the first scraper 12 in that area, ensuring effective scraping off of the condensate.

[0064] For example, such as Figures 3-5 As shown, the advantages of this design are: optimized structural compactness: the moving part 16 is set in the first groove 14 on the partition 4 and connected to the first scraper 12 through the first connecting rod 18, achieving precise control of the scraper movement within a limited space, making the entire heating device more compact. This compact structure not only saves space but also facilitates equipment installation, maintenance, and management, reducing the overall complexity of the equipment. Improved equipment reliability: Compared to some complex drive systems, this method of transmitting power through a simple linkage mechanism reduces complex connections and transmission links between components, lowering the possibility of failure. At the same time, the structure and function of each component are relatively simple, making them easy to inspect and maintain, improving the reliability and stability of the equipment, and reducing production interruptions caused by equipment failure.

[0065] like Figures 3-5 As shown, this illustrates a red mud washing water heating device in another embodiment of the present disclosure. The partition 4 also has a second opening 19 communicating with the first groove 14 and the third cavity 6. The heating device further includes: a second mounting plate 20 and a first mounting plate 17 symmetrically arranged relative to the moving member 16, with the second mounting plate 20 located at the second opening 19; one end of the second connecting rod 21 is hinged to the second scraper 13, and the other end is hinged to the second mounting plate 20; the moving member 16 is configured to move and then drive the second scraper 13 to move via the second connecting rod 21; the sealing plate 22 moves... The sealing plate 22 is dynamically disposed within the first groove 14, located on one side of the movable member 16 and completely covering the first opening 15 and / or the second opening 19. The moving direction of the sealing plate 22 is parallel to the moving direction of the movable member 16. The sealing plate 22 has a through hole 23, which communicates with the first opening 15 and / or the second opening 19 to avoid the first mounting plate 17 and / or the second mounting plate 20. The sealing plate 22 is configured to move with the movable member 16 to block the communication between the first opening 15 and / or the second opening 19 and the first groove 14, and to block the steam communication between the second cavity 5 and the third cavity 6.

[0066] In some examples, when the movable component 16 moves upward, it drives the first scraper 12 to move at the bottom of the washing sleeve 7 via the first connecting rod 18, scraping off the condensate accumulated at the bottom of the washing sleeve 7 in the second cavity 5. Simultaneously, since the second mounting plate 20 and the first mounting plate 17 are symmetrically arranged relative to the movable component 16, the movement of the movable component 16 also drives the second scraper 13 to move at the bottom of the washing sleeve 7 in the third cavity 6 via the second connecting rod 21, scraping off the condensate at the bottom of the washing sleeve 7 in the third cavity 6. The sealing plate 22 effectively prevents steam exchange between the two cavities, avoiding inadequate heating. Furthermore, when it is necessary to independently control the steam environment in a certain cavity, such as when inspecting or adjusting the steam flow in the second cavity 5, the sealing plate 22 completely covers the first opening 15, blocking the communication between the second cavity 5 and the first groove 14, thereby preventing steam exchange between the second cavity 5 and the third cavity 6. The steam in the third cavity 6 does not affect the operation of the second cavity 5.

[0067] For example, such as Figures 3-5 As shown, the advantages of this design are: synchronized scraper movement: through the cooperation of the moving part 16 with the symmetrically arranged first and second mounting plates 20 and the connecting rod, the first scraper 12 and the second scraper 13 are synchronously controlled. This synchronous movement ensures that the condensate at the bottom of the wash water sleeve 7 in both chambers can be removed simultaneously, improving the overall efficiency of condensate removal and further ensuring the uniformity and efficiency of wash water heating. Flexible steam isolation: the design of the sealing plate 22 allows for flexible isolation of the steam environment between the second chamber 5 and the third chamber 6. During equipment maintenance, repair, or adjustment of steam parameters in a certain chamber according to production needs, it can effectively prevent steam from flowing between the two chambers, avoiding mutual interference and ensuring that each chamber can operate independently and stably, improving the flexibility and reliability of equipment operation. Ensuring heating stability: by blocking the steam flow between chambers, the problem of uneven or unstable heating caused by steam crossflow is avoided. Each chamber can stably heat the washing water sleeve 7 according to the set steam parameters, thereby ensuring that the washing water can stably reach the temperature required for the sedimentation process, improving the stability of the red mud sedimentation and separation effect, and helping to improve the overall quality and efficiency of alumina production.

[0068] like Figures 3-5 As shown, a red mud washing water heating device is illustrated in another embodiment of the present disclosure. The heating device further includes: one end of the first elastic member 24 acts on the inner wall of the first groove 14, and the other end acts on the sealing plate 22, for providing a force for the sealing plate 22 to reset after movement.

[0069] In some examples, the up-and-down movement of the movable member 16 will cause the sealing plate 22 to move up and down via the first mounting plate 17 or the second mounting plate 20, and the first elastic member 24 may be a spring, which can apply a pulling or pushing force to the sealing plate 22 so that the sealing plate 22 can always be reset after being pushed by the movable member 16.

[0070] For example, such as Figures 3-5 As shown, the advantage of this design is the automatic reset function: the first elastic element 24 gives the sealing plate 22 the ability to automatically reset, so that the sealing plate 22 always moves with the moving element 16, ensuring that the connection between the second cavity 5 or the third cavity 6 and the first groove 14 is always blocked, thus preventing steam crossflow.

[0071] like Figures 3-5 As shown, a red mud washing water heating device is illustrated in another embodiment of the present disclosure. The heating device further includes a linear drive 25 disposed on the housing 2 and drivenly connected to the moving part 16.

[0072] In some examples, the linear actuator 25 is securely mounted on the housing 2, and it can be an electric actuator. One end of the electric actuator is tightly secured to the housing 2 with bolts to ensure that it will not loosen during operation. The other end is driven to the moving part 16, for example, by connecting the extension rod of the electric actuator to the moving part 16 through a connector, so that the electric actuator can precisely control the vertical movement of the moving part 16 within the first groove 14.

[0073] For example, such as Figures 3-5 As shown, the advantages of this design are: precise control of the scraper movement: the linear drive 25 can precisely control the position and speed of the moving part 16, thereby precisely controlling the movement of the first scraper 12 and the second scraper 13. Compared with manual operation or simple mechanical control, the linear drive 25 can achieve fine adjustment of the scraper movement according to the actual accumulation of condensate, enabling the scraper to more accurately and effectively scrape away condensate accumulated at different positions and to different degrees at the bottom of the washing sleeve 7, improving the condensate removal efficiency and further ensuring the heating effect of the washing water. Increased automation: the linear drive 25 automates the entire scraper control process. The operator only needs to issue commands on the control panel, and the linear drive 25 can automatically complete the driving operation of the moving part 16 without direct manual intervention in the scraper movement. This not only reduces the workload and labor intensity of manual operation, but also avoids problems such as incomplete condensate removal caused by untimely or inaccurate manual operation, improving the stability and reliability of equipment operation, and enhancing the automation level of the production process.

[0074] like Figures 3-5As shown, a red mud washing water heating device is illustrated in another embodiment of this disclosure. The heating device further includes: a pressing block 26 movably disposed in the first groove 14, the moving direction of the pressing block 26 being parallel to the moving direction of the moving member 16, the pressing block 26 being located above the moving member 16, and the pressing block 26 being configured to press down after moving and drive the moving member 16 to move downward; one end of the second elastic member 27 acts on the inner wall of the first groove 14, and the other end acts on the moving member 16, for providing a force for the moving member 16 to move upward.

[0075] In some examples, when the linear drive 25 unexpectedly fails, the pressure block 26 comes into play. An operator pushes the pressure block 26 via an external control mechanism (e.g., a simple lever connected to it). The pressure block 26 moves downward within the first groove 14 in a direction parallel to the moving member 16. Because the pressure block 26 is above the moving member 16, it presses down on the moving member 16, causing it to move downward. As the moving member 16 moves downward, the first scraper 12 moves at the bottom of the wash sleeve 7 via the first link 18, and the second scraper 13 moves via the second link 21, bringing the scrapers closer to areas with more condensate buildup for more effective condensate removal. During this process, the second elastic member 27 is compressed. The second elastic member 27 can be a high-strength helical spring, with one end pressed tightly against the inner wall of the first groove 14 and the other end connected to the moving member 16. The spring stores elastic potential energy during compression. When the condensate buildup improves and the scraper is no longer needed in its current position, the operator releases the force applied to the lower pressure block 26. At this point, the second elastic element 27, having stored elastic potential energy, begins to release energy, pushing the moving element 16 upwards. The moving element 16 then drives the first scraper 12 and the second scraper 13 back to their initial positions.

[0076] For example, such as Figures 3-5As shown, the advantages of this design are: First, it assists in controlling the movement of the moving part 16: it can temporarily replace the linear drive 25 to drive the moving part 16, and can still control the moving part 16 to drive the scraper to remove condensate even after the linear drive 25 fails. Second, it allows for flexible scraper position adjustment: the combination of the lowering block 26 and the second elastic element 27 makes the scraper position adjustment more flexible. Operators can quickly adjust the scraper position by pressing down the lowering block 26 according to the actual condensate accumulation, enabling the scraper to more accurately clean condensate at different locations at the bottom of the washing sleeve 7, improving the condensate cleaning effect and ensuring the high efficiency of the washing water heating. Third, it provides an automatic reset function: the second elastic element 27 provides the moving part 16 with an automatic reset force. When the external force of the lowering block 26 is removed, the moving part 16 can automatically return to its initial position under the action of the second elastic element 27, allowing the scraper position to quickly return to the standard state, facilitating the handling of possible condensate accumulation in the next situation. This automatic reset function not only saves time and effort for manual adjustment but also ensures the stability and consistency of equipment operation.

[0077] like Figures 3-5 As shown, a red mud washing water heating device is shown in another embodiment of the present disclosure. The lower pressure block 26 has a slot 28. The heating device also includes: a threaded rod 29 threaded on the housing 2, the bottom of the threaded rod 29 having a locking part 30, the locking part 30 being located in the slot 28, the locking part 30 being freely rotatable relative to the slot 28, and the threaded rod 29 being configured to drive the lower pressure block 26 to move after rotation; and a handwheel 31 being disposed on the top of the threaded rod 29.

[0078] In some examples, as the handwheel 31 rotates, the threaded rod 29 begins to move up and down. The locking part 30 at the bottom of the threaded rod 29 is located in the slot 28 of the lower pressure block 26 and can rotate freely in the slot 28. Therefore, when the threaded rod 29 moves up and down, it will drive the lower pressure block 26 to move in the first groove 14 in a direction parallel to the moving part 16. The locking part 30 rotates freely relative to the slot 28 and will not drive the lower pressure block 26 to rotate as well.

[0079] For example, such as Figures 3-5 As shown, the advantages of this design are convenient and labor-saving operation: the handwheel 31 allows the operator to easily rotate it to move the lower pressure block 26. Compared to directly applying a large pushing force to the lower pressure block 26, rotating the handwheel 31 requires less effort, reducing the operator's labor intensity. This design makes scraper position adjustment more convenient and improves the operator's work efficiency, especially when frequent scraper position adjustments are required.

[0080] like Figures 3-5As shown, a red mud washing water heating device is illustrated in another embodiment of the present disclosure. The heating device further includes: an upper limit member 32 disposed on the threaded rod 29, located outside the housing 2 and below the handwheel 31, for limiting the downward displacement of the threaded rod 29; and a lower limit member 33 disposed on the threaded rod 29, located inside the first groove 14 and above the lower pressure block 26, for limiting the upward displacement of the threaded rod 29.

[0081] In some examples, when the upper limit member 32 contacts the surface of the housing 2, the threaded rod 29 can no longer move downwards. This limits the downward distance of the lower pressure block 26 and the moving member 16, preventing the lower pressure block 26 from excessively pressing down on the moving member 16 and preventing damage to components such as the moving member 16, the first connecting rod 18, the second connecting rod 21, and the scraper due to excessive pressure. When the lower limit member 33 contacts the lower pressure block 26, the threaded rod 29 can no longer move upwards, thus limiting the upward distance of the lower pressure block 26. This ensures that the lower pressure block 26 will not detach from the threaded rod 29, and at the same time ensures that the moving member 16 will not rise excessively when reset under the action of the second elastic member 27, maintaining the stability of the entire device structure and the accuracy of the positions of each component.

[0082] For example, such as Figures 3-5 As shown, the advantages of this design are: Protection of equipment components: The upper limit member 32 and lower limit member 33 effectively protect the internal components of the heating device. By limiting the displacement of the threaded rod 29, excessive pressure from the lower pressure block 26 on the moving part 16 or the lower pressure block 26 disengaging from the threaded rod 29 is avoided, preventing damage caused by excessive component movement, extending the service life of key components such as the moving part 16, connecting rod, and scraper, and reducing equipment maintenance costs. Improved operational accuracy: The limit members provide clear operating boundaries for operators. When adjusting the scraper position, operators can clearly know the limit position of the threaded rod 29's rotation, thereby more accurately controlling the scraper's movement distance. This allows the scraper to be precisely positioned to handle different condensate accumulation situations, further improving the condensate cleaning effect and ensuring the high efficiency and stability of the washing water heating.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A red mud washing water heating device, used to convey heated washing water into a settling tank (1), characterized in that, The heating device includes: The outer shell (2) has a first cavity (3) inside; A partition (4) is disposed inside the outer shell (2) to divide the first cavity (3) into a second cavity (5) and a third cavity (6). A washing sleeve (7) is disposed on the partition (4) and penetrates the outer shell (2). The outer shell (2) also has a secondary steam inlet (8) and a new steam inlet (9) located above the washing sleeve (7) and on both sides of the partition (4). The secondary steam inlet (8) is connected to the second cavity (5), and the new steam inlet (9) is connected to the third cavity (6).

2. The red mud washing water heating device according to claim 1, characterized in that, The outer shell (2) also has a first condensate drain (10) and a second condensate drain (11) located below the washing sleeve (7) and on both sides of the partition (4). The first condensate drain (10) is connected to the second cavity (5), and the second condensate drain (11) is connected to the third cavity (6).

3. The red mud washing water heating device according to claim 1, characterized in that, The heating device also includes: The first scraper (12) is movable relative to the washing sleeve (7), located in the second cavity (5), and abuts against the bottom of the washing sleeve (7). The first scraper (12) is configured to scrape off the condensate that has accumulated at the bottom of the washing sleeve (7) after it moves. The second scraper (13) is movable relative to the washing sleeve (7) and located in the third cavity (6), abutting against the bottom of the washing sleeve (7). The second scraper (13) is configured to scrape off the condensate that has accumulated at the bottom of the washing sleeve (7) after it moves.

4. The red mud washing water heating device according to claim 3, characterized in that, The partition (4) has a first groove (14) and a first opening (15) that are interconnected, the first opening (15) being connected to the second cavity (5), and the heating device further includes: The movable part (16) is vertically movable and disposed in the first groove (14), and the moving direction of the movable part (16) is perpendicular to the moving direction of the first scraper (12). A first mounting plate (17) is disposed on the movable part (16) and located at the first opening (15); The first link (18) is hinged at one end to the first scraper (12) and at the other end to the first mounting plate (17). The moving part (16) is configured to move the first scraper (12) via the first link (18) after it moves.

5. The red mud washing water heating device according to claim 4, characterized in that, The partition (4) also has a second opening (19) communicating with the first groove (14), the second opening (19) communicating with the third cavity (6), and the heating device further includes: The second mounting plate (20) is symmetrically arranged with respect to the moving part (16) relative to the first mounting plate (17), and the second mounting plate (20) is located at the second opening (19); The second link (21) is hinged at one end to the second scraper (13) and at the other end to the second mounting plate (20). The moving part (16) is configured to move the second scraper (13) via the second link (21) after it moves. A sealing plate (22) is movably disposed within the first groove (14), located on one side of the moving member (16) and completely covering the first opening (15) and / or the second opening (19). The moving direction of the sealing plate (22) is parallel to the moving direction of the moving member (16). The sealing plate (22) has a through hole (23) communicating with the first opening (15) and / or the second opening (19) to avoid the first mounting plate (17) and / or the second mounting plate (20). The sealing plate (22) is configured to move with the moving member (16) to block the steam communication between the second cavity (5) and the third cavity (6).

6. The red mud washing water heating device according to claim 5, characterized in that, The heating device also includes: The first elastic element (24) acts on the inner wall of the first groove (14) at one end and on the sealing plate (22) at the other end, and is used to provide the force for the sealing plate (22) to return to its original position after it moves.

7. The red mud washing water heating device according to claim 4, characterized in that, The heating device also includes: A linear drive (25) is disposed on the housing (2) and is drivenly connected to the moving part (16).

8. The red mud washing water heating device according to claim 4, characterized in that, The heating device also includes: The pressing block (26) is movably disposed in the first groove (14). The moving direction of the pressing block (26) is parallel to the moving direction of the moving member (16). The pressing block (26) is located above the moving member (16). The pressing block (26) is configured to press down after moving and drive the moving member (16) to move downward. The second elastic element (27) acts on the inner wall of the first groove (14) at one end and on the moving element (16) at the other end, and is used to provide the moving element (16) with an upward force.

9. The red mud washing water heating device according to claim 8, characterized in that, The pressing block (26) has a slot (28), and the heating device further includes: A threaded rod (29) is threaded on the housing (2). The bottom of the threaded rod (29) has a retaining part (30). The retaining part (30) is located in the retaining groove (28). The retaining part (30) can rotate freely relative to the retaining groove (28). The threaded rod (29) is configured to drive the lower pressure block (26) to move after rotation. A handwheel (31) is located on top of the threaded rod (29).

10. The red mud washing water heating device according to claim 9, characterized in that, The heating device also includes: An upper limit stop (32) is provided on the threaded rod (29), located outside the housing (2) and below the handwheel (31), for limiting the downward displacement of the threaded rod (29); The lower limit member (33) is disposed on the threaded rod (29), located in the first groove (14) and above the lower pressure block (26), and is used to limit the upward displacement of the threaded rod (29).

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