Continuous high-temperature crystallization equipment for waste acid regeneration and utilization of manganese sulfate

Abstract

The present application relates to high temperature crystallization equipment technical field, specifically speaking is the continuous type manganese sulfate high temperature crystallization equipment of waste acid regeneration utilization, including primary crystallization jar, secondary crystallization jar and tertiary crystallization jar;Primary crystallization jar, secondary crystallization jar and tertiary crystallization jar are fixedly connected through several connecting columns between primary crystallization jar, secondary crystallization jar and tertiary crystallization jar, and the jacket is fixedly sleeved outside primary crystallization jar, secondary crystallization jar and tertiary crystallization jar, every jacket outside is fixedly connected with medium box, every cavity is equipped with heat pipe in every cavity, and every heat pipe both ends are connected with corresponding medium box inlet and outlet respectively, the beneficial effects of the present application: through primary crystallization jar, secondary crystallization jar and tertiary crystallization jar to the fractional crystallization of manganese sulfate solution, set up different temperature in each crystallization jar, make the manganese sulfate solution in the flowing process experience different crystallization conditions, thereby improve crystallization efficiency and guarantee crystallization block size uniformity.

Description

Technical Field

[0001] This invention relates to the field of high-temperature crystallization equipment technology, specifically to a continuous high-temperature manganese sulfate crystallization equipment for the regeneration and utilization of waste acid. Background Technology

[0002] In the production of ferrosilicon manganese alloys, these alloys, as important alloying materials, are widely used in industries such as steel smelting. However, the production process inevitably generates a large amount of dust. This dust is not worthless waste; it is rich in manganese and has high recycling value. The rational recovery and utilization of this manganese can not only reduce production costs but also reduce environmental pollution, achieving resource recycling and aligning with the current concept of sustainable development. Currently, using waste dilute sulfuric acid to treat ferrosilicon dust to recover manganese, and then purifying the manganese sulfate solution through co-precipitation and displacement reactions to obtain high-purity manganese sulfate, is one of the common and effective methods for treating ferrosilicon dust. After obtaining the manganese sulfate solution, it needs to be subjected to high-temperature crystallization to obtain manganese sulfate crystalline products.

[0003] However, existing high-temperature crystallization equipment has many problems in practical applications. First, most existing high-temperature crystallization equipment adopts the method of directly crystallizing manganese sulfate solution, and the manganese sulfate solution is always at the same temperature. This single crystallization method results in low overall crystallization efficiency. Due to the lack of effective flow and disturbance in the solution during the crystallization process, the crystallization speed is slow, which leads to a longer production cycle and cannot meet the needs of large-scale industrial production. Second, the solution is in a static state in the crystallization equipment, which leads to uneven crystal size. Uneven crystal size not only affects the appearance quality of the product, but also brings many inconveniences to subsequent processing. Finally, the direct discharge of the high-temperature waste acid solution after crystallization will cause a huge waste of resources. Summary of the Invention

[0004] To address the problems in existing technologies, this invention provides a continuous high-temperature manganese sulfate crystallization device for waste acid regeneration. Specifically, this device solves the issues raised above by directly crystallizing manganese sulfate solution in most existing high-temperature crystallization devices, where the solution remains at a constant temperature. This single crystallization method results in low overall crystallization efficiency. Furthermore, the lack of effective flow and disturbance during crystallization leads to slow crystallization speed, extending the production cycle and failing to meet the demands of large-scale industrial production. Secondly, the static state of the solution within the crystallization device results in uneven crystal size, affecting product appearance and causing numerous inconveniences for subsequent processing. Finally, the direct discharge of the crystallized high-temperature waste acid solution leads to significant resource waste.

[0005] The technical solution adopted by this invention to solve its technical problem is: a continuous high-temperature crystallization equipment for waste acid regeneration, comprising a primary crystallizer, a secondary crystallizer, and a tertiary crystallizer; the primary, secondary, and tertiary crystallizers are fixedly connected by several connecting columns; each of the primary, secondary, and tertiary crystallizers is fixedly fitted with a jacket, and a medium tank is fixedly connected to the outside of each jacket; each jacket has a cavity, and a heat pipe is spirally arranged in each cavity; both ends of each heat pipe are connected to the inlet and outlet of the corresponding medium tank, respectively; the manganese sulfate solution is crystallized in stages through the primary, secondary, and tertiary crystallizers; an inlet pipe is fixedly connected to one side of the upper end of the primary crystallizer, and a liquid inlet pipe is fixedly connected inside the primary crystallizer. The mixing tank includes a mixing assembly with a rotating component at its bottom. The secondary crystallizer has a flow guiding assembly, and the tertiary crystallizer has several dispersing components. Several legs are fixedly connected to the bottom of the tertiary crystallizer, and a drain pipe is fixedly connected to one side of its bottom. A stopcock valve is installed between the bottom outlet of the primary crystallizer and the inlet of the secondary crystallizer, and between the outlet of the secondary crystallizer and the inlet of the tertiary crystallizer. The mixing assembly includes a motor fixed at the center of the upper end of the primary crystallizer. A rotating shaft is fixedly connected to the motor's output end and inserted into the mixing tank. Several mixing plates are fixedly connected to the outside of the rotating shaft, and each mixing plate has several through holes. A through pipe is fixedly connected to the bottom outlet of the mixing tank.

[0006] Specifically, the rotating assembly includes a rotating cylinder and a fixed ring. The upper end of the rotating cylinder is rotatably connected to the bottom end of the through pipe. The bottom end of the rotating shaft passes through the through pipe and is fixedly sleeved at the center position of the bottom of the rotating cylinder. Several sliding rods are horizontally fixed on the outside of the rotating cylinder. The fixed ring is fixedly connected to the inner wall of the primary crystallizer. The inner side of the fixed ring is provided with annular grooves that match the sliding rods. One end of each of the sliding rods is movably inserted into the annular groove. Several spiral pipes are fixedly connected to the bottom end of the rotating cylinder.

[0007] Specifically, each of the flow guiding components includes a flow guiding disk, and several flow guiding disks are inclinedly fixed on the inner wall of the secondary crystallization tank. Each of the several flow guiding disks has a notch on one side, and several fixing columns are fixed at the upper end of each of the several flow guiding disks. Adjacent two flow guiding disks are distributed in a "V" shape.

[0008] Specifically, each of the dispersion components includes a collection trough, which is fixed to the inner wall of the three-stage crystallizer. Several guide strips are uniformly fixed on the inner wall of the collection trough. A dispersion block is fixedly connected to the upper end of the collection trough by several fixing rods. Both the collection trough and the dispersion block are funnel-shaped. The tip of the dispersion block corresponds to the inlet of the three-stage crystallizer, and the tip of each dispersion block at the bottom corresponds to the outlet of the collection trough at the upper end.

[0009] Specifically, a fixed cylinder is fixedly inserted on one side of the upper end of each of the primary crystallizer, secondary crystallizer, and tertiary crystallizer, and a thermometer is inserted in each fixed cylinder.

[0010] Specifically, an insulation box is provided on the outside of the secondary crystallizer. The insulation box is fixed on the outside of the corresponding jacket. The inlet pipe and the outlet pipe are both inserted into the insulation box. The part of the outlet pipe located inside the insulation box is coiled around the outside of the inlet pipe.

[0011] Specifically, the bottom of the three-stage crystallization tank is horizontally fixed with several sets of crossbars, which are staggered and have gaps between adjacent crossbars for crystal blocks to pass through.

[0012] The beneficial effects of this invention are:

[0013] 1. The beneficial effects of the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration described in this invention: By employing a primary crystallizer, a secondary crystallizer, and a tertiary crystallizer to perform graded crystallization of the manganese sulfate solution, and setting different temperatures in each crystallizer, the manganese sulfate solution experiences different crystallization conditions during its flow, breaking the traditional single-temperature crystallization method. In the primary crystallizer, the stirring component thoroughly stirs the solution, and the through holes on the stirring plate enhance the stirring effect, ensuring uniform mixing of the solution and accelerating the initial crystallization speed. Simultaneously, the solution is dispersed into several spiral pipes, and the spiral pipes rotate with the shaft. The flow mechanism further promotes the flow and mixing of the solution and extends the time the solution spends in the primary crystallizer, preventing local overheating or undercooling and improving crystallization efficiency. In the secondary crystallizer, the flow guiding component makes the solution flow in a "V" shape, increasing the residence time and flow path of the solution in the tank, allowing the solution more time to crystallize and further improving crystallization efficiency. In the tertiary crystallizer, the dispersion component disperses the solution, making the solution evenly distributed in the tank, increasing the contact area between the solution and the crystallization environment, accelerating the crystallization process, and thus greatly shortening the production cycle to meet the needs of large-scale industrial production.

[0014] 2. The beneficial effects of the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration described in this invention are as follows: In the primary crystallization tank, the synergistic effect of the stirring and rotating components keeps the solution in a dynamic flow state, avoiding the problems of uneven local concentration and inconsistent crystallization speed caused by static solution, thereby reducing the uneven size of the crystal blocks. In the secondary crystallization tank, the guide plate is inclined and distributed in a "V" shape. When the solution flows on the guide plate, it will be subject to uniform flow resistance, making the crystallization process more stable and helping to form uniformly sized crystal blocks. After the dispersion component in the tertiary crystallization tank disperses the solution, the solution flows along the guide strip in the collection tank, further ensuring the uniformity of the crystallization process, so that the final crystal blocks are relatively uniform in size. This not only improves the appearance quality of the product, but also provides convenience for subsequent processing, such as in filtration and drying processes. Uniform crystal blocks can ensure consistent filtration speed and uniform drying, reducing production costs and energy consumption.

[0015] 3. The beneficial effects of the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration described in this invention: When the crystallized high-temperature waste acid solution flows in the drain pipe, its heat can be transferred to the manganese sulfate solution to be crystallized in the inlet pipe, preheating the solution in the inlet pipe and realizing heat recovery and utilization. Simultaneously, through this heat exchange, the temperature of the high-temperature waste acid solution decreases, providing more favorable conditions for subsequent further processing and resource recovery. This avoids resource waste and environmental pollution caused by direct discharge of the high-temperature waste acid solution, achieving waste acid regeneration and utilization, which aligns with the concept of sustainable development. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 A schematic diagram of the structure of a continuous high-temperature manganese sulfate crystallization device for the recycling of waste acid provided by the present invention;

[0018] Figure 2 A cross-sectional view of the internal structure of the primary crystallization tank of the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration provided by the present invention.

[0019] Figure 3 A schematic diagram of the connection structure between the stirring component and the rotating component of the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration provided by the present invention.

[0020] Figure 4 A cross-sectional view of the internal structure of the secondary crystallization tank in the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration provided by the present invention.

[0021] Figure 5 A cross-sectional view of the internal structure of the three-stage crystallization tank in the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration provided by the present invention.

[0022] Figure 6 A schematic diagram of the dispersion component structure of the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration and utilization provided by the present invention.

[0023] Figure 7 A schematic diagram of the flow guiding component structure of the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration and utilization provided by the present invention;

[0024] Figure 8 A schematic diagram of the internal structure of the insulation box of the continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration and utilization provided by the present invention.

[0025] In the diagram: 1. Primary crystallizer; 2. Secondary crystallizer; 3. Tertiary crystallizer; 4. Support leg; 5. Jacket; 6. Stirring assembly; 61. Motor; 62. Rotating shaft; 63. Stirring plate; 64. Through hole; 65. Through pipe; 7. Rotating assembly; 71. Spiral pipe; 72. Rotating drum; 73. Fixing ring; 74. Sliding rod; 75. Annular groove; 8. Flow guiding assembly; 81. Flow guiding plate; 82. Fixing column; 83. Notch; 9. Dispersion assembly; 91. Dispersion block; 92. Collection trough; 93. Fixing rod; 94. Flow guiding strip; 10. Medium tank; 11. Connecting column; 12. Drain pipe; 13. Insulation box; 14. Inlet pipe; 15. Thermometer; 16. Fixing cylinder; 17. Cavity; 18. Heat pipe; 19. Stirring tank; 20. Stop valve; 21. Crossbar. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0027] like Figures 1-8 As shown, the present invention provides the following technical solution:

[0028] Example 1: A continuous high-temperature manganese sulfate crystallization device for waste acid regeneration includes a primary crystallizer 1, a secondary crystallizer 2, and a tertiary crystallizer 3. The primary crystallizer 1, secondary crystallizer 2, and tertiary crystallizer 3 are fixedly connected by several connecting columns 11. Each of the primary crystallizer 1, secondary crystallizer 2, and tertiary crystallizer 3 has a jacket 5 fixedly fitted on its outer side. A medium tank 10 is fixedly connected to the outer side of each jacket 5. Each jacket 5 has a cavity 17, and a heat pipe 18 is spirally arranged in each cavity 17. Both ends of each heat pipe 18 are connected to the inlet and outlet of the corresponding medium tank 10. The manganese sulfate solution is crystallized in stages through the primary crystallizer 1, secondary crystallizer 2, and tertiary crystallizer 3. An inlet pipe 14 is fixedly connected to one side of the upper end of the primary crystallizer 1. A stirring tank 19 is fixedly connected inside the primary crystallizer 1, and a stirring assembly 6 is installed inside the stirring tank 1. The bottom of the tertiary crystallizer 3... Several support legs 4 are fixedly connected, and a drain pipe 12 is fixedly connected to one side of the bottom of the three-stage crystallizer 3. A stopcock valve 20 is provided between the bottom outlet of the first-stage crystallizer 1 and the inlet of the second-stage crystallizer 2, and between the outlet of the second-stage crystallizer 2 and the inlet of the third-stage crystallizer 3. The stirring assembly 6 includes a motor 61, which is fixedly located at the center of the upper end of the first-stage crystallizer 1. A rotating shaft 62 is fixedly connected to the output end of the motor 61. The rotating shaft 62 is inserted into the stirring tank 19. Several stirring plates 63 are fixedly connected to the outside of the rotating shaft 62. Several through holes 64 are provided on the stirring plates 63. A through pipe 65 is fixedly connected to the bottom outlet of the stirring tank 19. The manganese sulfate solution is crystallized in stages through the first-stage crystallizer 1, the second-stage crystallizer 2, and the third-stage crystallizer 3. Different temperatures are set in each crystallizer so that the manganese sulfate solution experiences different crystallization conditions during the flow process, thereby improving the crystallization efficiency and ensuring that the crystal blocks are of uniform size.

[0029] The outer side of the secondary crystallization tank 2 is equipped with an insulation box 13, which is fixed to the outer side of the corresponding jacket 5. The inlet pipe 14 and the outlet pipe 12 are both inserted into the insulation box 13. The part of the outlet pipe 12 located inside the insulation box 13 is coiled around the outside of the inlet pipe 14. The high-temperature waste acid discharged from the outlet pipe 12 is coiled around the inlet pipe 14 inside the insulation box 13 to preheat the newly added manganese sulfate solution, and then discharged into the waste acid recovery system to save resources.

[0030] Each of the primary crystallizer 1, the secondary crystallizer 2, and the tertiary crystallizer 3 has a fixed cylinder 16 inserted on one side of its upper end. A thermometer 15 is inserted into each fixed cylinder 16, allowing staff to observe the real-time temperature inside each crystallizer.

[0031] In use, the purified manganese sulfate solution is fed into the primary crystallizer 1 through the inlet pipe 14. High-temperature heat transfer oil (initial temperature 90℃, temperature control accuracy ±2℃) is introduced into the heat pipe 18 of the jacket 5 from the medium tank 10. The primary crystallizer 1 is heated through the heat pipe 18. The motor 61 is started, and the rotating shaft 62 drives the stirring plate 63 to rotate at 150 r / min. Turbulence is generated through the through-hole 64 of the stirring plate 63, ensuring uniform solution concentration. The flow rate is controlled by the stopcock valve 20. The solution undergoes initial evaporation and concentration in the primary crystallizer 1, forming a supersaturated solution, and some manganese sulfate begins to crystallize. At this time, the thermometer 15 shows that the temperature inside the tank is maintained at 85±2℃. The primary crystallizer 1 and the secondary crystallizer 1 are then connected. The stop valve 20 between tanks 2 allows the solution to flow into the secondary crystallizer 2. Medium-temperature heat transfer oil (initial temperature 65℃, temperature control accuracy ±2℃) is introduced through the heat pipe 18 of the jacket 5 of the secondary crystallizer 2. The solution continues to crystallize in the secondary crystallizer 2, forming larger crystal nuclei. Then, the stop valve 20 between the secondary crystallizer 2 and the tertiary crystallizer 3 is opened, allowing the solution to enter the tertiary crystallizer 3. Low-temperature heat transfer oil (initial temperature 40℃, temperature control accuracy ±2℃) is introduced through the heat pipe 18 of the jacket 5 of the tertiary crystallizer 3, promoting complete crystallization of manganese sulfate. The high-temperature waste acid discharged from the drain pipe 12 is coiled around the inlet pipe 14 in the insulation box 13 to preheat the newly introduced manganese sulfate solution before being discharged into the waste acid recovery system, saving resources.

[0032] Example 2: The technical solution of this example, which differs from that of Example 1, includes: a rotating component 7 at the bottom of the stirring assembly 6. The rotating component 7 includes a rotating cylinder 72 and a fixed ring 73. The upper end of the rotating cylinder 72 is rotatably connected to the bottom end of the through pipe 65. The bottom end of the rotating shaft 62 passes through the through pipe 65 and is fixedly sleeved at the center of the bottom of the rotating cylinder 72. Several sliding rods 74 are horizontally fixed on the outside of the rotating cylinder 72. The fixed ring 73 is fixedly connected to the inner wall of the primary crystallizer 1. The inner side of the fixed ring 73 is provided with an annular groove 75 that matches the sliding rods 74. One end of each of the sliding rods 74 is movably inserted into the annular groove 75. Several spiral pipes 71 are fixedly connected to the bottom of the rotating cylinder 72. The rotating shaft 62 drives the spiral pipes 71 to rotate, thereby dispersing and crystallizing the manganese sulfate solution and further mixing the solution, thus improving the crystallization efficiency.

[0033] In use, after initial stirring in the stirring tank 19, the solution flows into the rotating drum 72 through the connecting pipe 65 and is dispersed into several spiral pipes 71. As the rotating shaft 62 drives the rotating drum 72 to rotate, the spiral pipes 71 also rotate. During the flow of the solution in the spiral pipes 71, it is subjected to centrifugal force and gravity, which further promotes the flow and mixing of the solution. At the same time, it prolongs the residence time of the solution in the primary crystallizer 1, allowing the solution to undergo high-temperature crystallization conditions in the primary crystallizer 1, and some manganese sulfate begins to crystallize and precipitate.

[0034] Example 3: The technical solution of this example, which differs from that of Example 2, includes: a flow guiding component 8 is also provided inside the secondary crystallizer 2. Each flow guiding component 8 includes a flow guiding plate 81. Several flow guiding plates 81 are inclined and fixed on the inner wall of the secondary crystallizer 2 (inclination angle 30°). A notch 83 is provided on one side of several flow guiding plates 81. Several fixing columns 82 are fixed on the upper end of several flow guiding plates 81. Two adjacent flow guiding plates 81 are arranged in a "V" shape. The solution is guided by several inclined flow guiding plates 81, which prolongs the crystallization time of the solution in the secondary crystallizer 2 and ensures the crystallization effect.

[0035] When in use, after the solution enters the secondary crystallizer 2, it first falls onto the uppermost guide plate 81. Since the guide plate 81 is tilted and has a notch 83 on one side, the solution flows along the surface of the guide plate 81 and falls into the next guide plate 81 from the notch 83, forming a "V" shape. This increases the residence time and flow path of the solution in the secondary crystallizer 2. During the flow, the solution continues to crystallize under the temperature conditions set in the secondary crystallizer 2, further precipitating manganese sulfate crystals. The fixed column 82 on the guide plate 81 plays a certain role in blocking and dispersing, making the solution flow more uniform and avoiding local concentrations that are too high or too low.

[0036] Example 4: The technical solution of this example, which differs from Example 2, includes: The three-stage crystallizer 3 is further equipped with several dispersion components 9. Each dispersion component 9 includes a collecting trough 92, which is fixed to the inner wall of the three-stage crystallizer 3. Several guide strips 94 are uniformly fixed to the inner wall of the collecting trough 92. A dispersion block 91 is fixedly connected to the upper end of the collecting trough 92 by several fixing rods 93. Both the collecting trough 92 and the dispersion block 91 are funnel-shaped. The upper end of the dispersion block is designed with a 60° cone angle, and the tip of the dispersion block 91 corresponds to the inlet of the three-stage crystallizer 3. Each dispersion block 91 at the bottom has its tip corresponding to the outlet of the collection tank 92 at the top. After the solution enters from the inlet of the three-stage crystallizer 3, it first impacts the dispersion block 91, which disperses the solution into fine droplets or liquid streams, making it evenly distributed in the three-stage crystallizer 3. The solution falls into the collection tank 92 and flows along the guide strips 94 on the inner wall of the collection tank 92, which further increases the contact area between the solution and the crystallization environment and accelerates the crystallization process. Under the relatively low temperature conditions set in the three-stage crystallizer 3, the manganese sulfate in the solution fully crystallizes out.

[0037] The bottom of the three-stage crystallizer 3 is also horizontally fixed with several sets of crossbars 21. The crossbars 21 are staggered and there are gaps between adjacent crossbars 21 for crystal blocks to pass through, which plays a certain role in blocking and dispersing the solution, and further enhances the crystallization efficiency.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous high-temperature manganese sulfate crystallization equipment for the regeneration and utilization of waste acid, characterized in that, It includes a primary crystallizer (1), a secondary crystallizer (2), and a tertiary crystallizer (3); The primary crystallizer (1), secondary crystallizer (2) and tertiary crystallizer (3) are fixedly connected by several connecting columns (11). Each of the primary crystallizer (1), secondary crystallizer (2) and tertiary crystallizer (3) is fixedly fitted with a jacket (5). Each jacket (5) is fixedly connected to a medium tank (10). Each jacket (5) is provided with a cavity (17). Each cavity (17) is spirally provided with a heat pipe (18). Each heat pipe (18) is connected to the inlet and outlet of the corresponding medium tank (10) at both ends. The first-stage crystallizer (1) is fixedly connected to one side of the upper end of the liquid inlet pipe (14), and the first-stage crystallizer (1) is fixedly connected to the inside of the stirring tank (1). The stirring tank (19) is provided with a stirring component (6), and the bottom end of the stirring component (6) is provided with a rotating component (7). The secondary crystallizer (2) is equipped with a flow guiding component (8), the tertiary crystallizer (3) is equipped with several dispersing components (9), the bottom of the tertiary crystallizer (3) is fixedly connected with several support legs (4), and the bottom side of the tertiary crystallizer (3) is fixedly connected with a drain pipe (12). The stirring assembly (6) includes a motor (61), which is fixed at the center of the upper end of the primary crystallizer (1). The output end of the motor (61) is fixedly connected to a rotating shaft (62), which is inserted into the stirring tank (19). Several stirring plates (63) are fixedly connected to the outside of the rotating shaft (62). Several through holes (64) are provided on the stirring plates (63). A through pipe (65) is fixedly connected to the bottom outlet of the stirring tank (19).

2. The continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration according to claim 1, characterized in that: The rotating assembly (7) includes a rotating cylinder (72) and a fixed ring (73). The upper end of the rotating cylinder (72) is rotatably connected to the bottom end of the through pipe (65). The bottom end of the rotating shaft (62) passes through the through pipe (65) and is fixedly sleeved at the center of the bottom of the rotating cylinder (72). Several sliding rods (74) are horizontally fixed on the outside of the rotating cylinder (72). The fixed ring (73) is fixedly connected to the inner wall of the primary crystallizer (1). The inner side of the fixed ring (73) is provided with an annular groove (75) that matches the sliding rods (74). One end of several sliding rods (74) is movably inserted into the annular groove (75). Several spiral pipes (71) are fixedly connected to the bottom end of the rotating cylinder (72).

3. The continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration according to claim 1, characterized in that: Each of the flow guiding components (8) includes a flow guiding plate (81), and several flow guiding plates (81) are inclined and fixed on the inner wall of the secondary crystallizer (2). Each of the several flow guiding plates (81) has a notch (83) on one side, and several fixing columns (82) are fixed at the upper end of each of the several flow guiding plates (81). Adjacent two flow guiding plates (81) are distributed in a "V" shape.

4. The continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration according to claim 1, characterized in that: Each of the dispersion components (9) includes a collection trough (92), which is fixed on the inner wall of the three-stage crystallizer (3). Several guide strips (94) are uniformly fixed on the inner wall of the collection trough (92). A dispersion block (91) is fixedly connected to the upper end of the collection trough (92) by several fixing rods (93). Both the collection trough (92) and the dispersion block (91) are funnel-shaped, and the tip of the dispersion block (91) corresponds to the inlet of the three-stage crystallizer (3).

5. The continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration according to claim 1, characterized in that: Each of the first-stage crystallizer (1), the second-stage crystallizer (2), and the third-stage crystallizer (3) has a fixed cylinder (16) inserted on one side of its upper end, and a thermometer (15) is inserted in each of the fixed cylinders (16).

6. The continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration according to claim 1, characterized in that: The secondary crystallizer (2) is provided with an insulation box (13) on the outside. The insulation box (13) is fixed on the outside of the corresponding jacket (5). The inlet pipe (14) and the outlet pipe (12) are both inserted in the insulation box (13). The part of the outlet pipe (12) located in the insulation box (13) is coiled around the outside of the inlet pipe (14).

7. The continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration according to claim 1, characterized in that: The bottom of the three-stage crystallizer (3) is fixed with several sets of crossbars (21), and the crossbars (21) are staggered, with gaps between adjacent crossbars (21) for crystal blocks to pass through.

8. The continuous high-temperature manganese sulfate crystallization equipment for waste acid regeneration according to claim 1, characterized in that: A stopcock valve (20) is provided between the bottom outlet of the primary crystallizer (1) and the inlet of the secondary crystallizer (2), and between the outlet of the secondary crystallizer (2) and the inlet of the tertiary crystallizer (3).

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