A sodium sulfate solution evaporation crystallization separator and its operation method

Abstract

This invention belongs to the field of sodium sulfate solution recovery, specifically a sodium sulfate solution evaporation crystallization separator and its operating method. The separator includes a tank, with a feed pipe at the top and a baffle fixedly connected to the inner wall of the tank. The top of the baffle has a concave structure, and a first housing is fixedly connected to the bottom of the baffle. A first heating wire is fixedly connected to the inner wall of the first housing. A discharge port is opened at the center of the baffle. A support plate is fixedly connected to the inner wall of the tank below the baffle, and a first mounting bracket is fixedly connected to the middle of the support plate. The sodium sulfate solution evaporation crystallization separator and its operating method provided by this invention use a guide ring to allow the evaporated steam to float upwards and flow upwards along the arc surface of the inner wall of the guide ring. The guide ring is heated by a second heating wire to maintain its temperature above the steam dew point. When the steam comes into contact with the inner wall of the guide ring, it will not liquefy but will escape directly upwards, avoiding the condensation of water droplets on the inner wall of the guide ring.

Description

Technical Field

[0001] This invention belongs to the field of sodium sulfate solution recovery, specifically a sodium sulfate solution evaporation crystallization separator and its operation method. Background Technology

[0002] Sodium sulfate is a byproduct of many chemical industrial production sectors and metallurgical plants. It can be used as an industrial raw material in industries such as daily chemicals, glass, papermaking, textiles, building materials, chemical weaving, and leather tanning. It can be used to manufacture products such as sodium sulfide, potassium sulfate, and precipitated barium sulfate, and can also be used as a filler in synthetic detergents. At the same time, large amounts of sodium sulfate waste liquid are discharged from metallurgy, papermaking, and chemical industries, requiring high-value treatment.

[0003] Most existing methods for sodium sulfate crystallization involve evaporation crystallization. This involves gradually heating the mother liquor to convert it into steam, with the residue crystallizing within a separator. The steam from the mother liquor then floats to the surface, separating from the crystals and exiting through a condenser. However, during the steam's ascent, some steam adheres to the inner wall of the separator. Upon contact with this wall, the steam cools and condenses into water droplets. These droplets then agglomerate and fall back into the mother liquor due to gravity. This water replenishment not only affects the formation of crystals within the mother liquor but also impacts the purity of the crystals. Furthermore, sodium sulfate crystals tend to agglomerate after precipitation, forming flocculent or blocky aggregates. These aggregates contain a large amount of mother liquor, which existing separators cannot effectively process, leading to excessive water content and insufficient purity in the crystals.

[0004] Therefore, the present invention provides a sodium sulfate solution evaporation crystallization separator and its operation method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention addresses the issue of steam from mother liquor conversion needing to float and separate from crystals before being discharged through a condenser. However, during the steam's ascent, some steam adheres to the inner wall of the separator. Upon contact with this wall, the steam is cooled and condenses into water droplets. As these droplets agglomerate, they fall back into the mother liquor due to gravity. This water replenishment not only affects the formation of crystals within the mother liquor but also impacts the purity of the crystals. Furthermore, sodium sulfate crystals tend to agglomerate after precipitation, forming flocculent or blocky aggregates. These aggregates contain a large amount of mother liquor, and existing separators are not suitable for processing the mother liquor trapped within the aggregates, leading to excessive water content and insufficient purity in the crystals. This invention proposes a sodium sulfate solution evaporation crystallization separator and its operating method.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A sodium sulfate solution evaporation crystallization separator of the present invention includes a tank body, a feed pipe provided at the top of the tank body, a baffle fixedly connected to the inner wall of the tank body, the top of the baffle having a concave structure, a first sleeve fixedly connected to the bottom of the baffle, a first heating wire fixedly connected to the inner wall of the first sleeve, a discharge port opened at the center of the baffle, a support plate fixedly connected to the inner wall of the tank body below the baffle, a first mounting frame fixedly connected to the middle of the support plate, a hydraulic cylinder fixedly connected inside the first mounting frame, a stop block fixedly connected to the output end of the hydraulic cylinder after passing through the top of the first mounting frame, the top of the stop block having a convex structure, the top of the stop block fitting against the inner wall of the discharge port, a drain assembly provided on the tank body, a sealing door rotatably connected to the outer wall of the tank body, and several support legs fixedly connected to the bottom of the tank body.

[0007] Preferably, the drainage assembly includes a guide ring, which is fixedly installed on the inner wall of the tank and located above the baffle. Both the inner and outer walls of the guide ring are set as annular arc surfaces. A plurality of drainage pipes are fixedly connected in a ring array on the outer wall of the tank. One end of the drainage pipe extends to the inner angle between the outer wall of the guide ring and the inner wall of the tank. A collection bottle is provided at the center of the bottom of the tank, and the other end of the drainage pipe extends into the interior of the collection bottle.

[0008] Preferably, a second sleeve is fixedly sleeved on the middle of the outer wall of the flow guide ring, a second heating wire is fixedly connected to the inner wall of the second sleeve, a barrier ring is fixedly connected to the top of the outer wall of the flow guide ring, the inner and outer walls of the barrier ring are both set as annular arc surfaces, and a guide block is fixedly connected to the bottom of the feed pipe, the top and bottom of the guide block are both set as inclined surfaces.

[0009] Preferably, the top of the outer wall of the tank has several heat dissipation fins fixedly connected in a ring array around the feed pipe.

[0010] Preferably, two fixed pipes are symmetrically fixedly connected to the tank body. The two fixed pipes are fixedly connected to a second mounting bracket at their close ends. The second mounting bracket is located between the guide ring and the baffle. The top of the second mounting bracket has a mounting groove. A fan is fixedly connected inside the mounting groove. An air inlet groove is opened inside the second mounting bracket. The air inlet groove communicates with the mounting groove. The close ends of the two fixed pipes are connected to the air inlet groove. The far ends of the two fixed pipes extend to the outside of the tank body.

[0011] Preferably, the top of the support plate is an annular concave structure, a feeding trough is provided in the middle of the support plate and at the lowest point of the concave structure, and a crushing component is provided below the support plate.

[0012] Preferably, the crushing assembly includes a filter plate, which is slidably connected inside the tank and located below the feed chute. Three sliding shafts are circumferentially fixedly connected to the inner wall of the tank near the filter plate. Sliding blocks are slidably connected to the outer walls of each of the three sliding shafts. All three sliding blocks are fixedly connected to the filter plate. Springs are sleeved on the outer walls of each of the three sliding shafts. The bottom of each spring is fixedly connected to the tank, and the top of each spring is fixedly connected to the corresponding sliding block. A first motor is fixedly connected inside the first mounting bracket, and the output end of the first motor passes through the first mounting bracket. A turntable is fixedly connected to the bottom of the frame, and the turntable is located above the filter plate. Two first top blocks are symmetrically fixedly connected to the bottom of the turntable, and the bottom of the two first top blocks is set as symmetrical slopes. Two second top blocks, corresponding one-to-one with the two first top blocks, are symmetrically fixedly connected to the top of the filter plate, and the top of the two second top blocks is set as symmetrical slopes. The bottom of the inner wall of the tank is concave. A connecting pipe is fixedly connected to the center of the bottom of the tank. The top and bottom of the connecting pipe are respectively connected to the inside of the tank and the inside of the collection bottle.

[0013] Preferably, a mounting ring is fixedly connected to the bottom of the support plate, and a crushing tooth is fixedly connected to the bottom of the mounting ring.

[0014] Preferably, a second motor is fixedly connected inside the second mounting frame. The output end of the second motor passes through the bottom of the second mounting frame and is fixedly connected to several brackets. The several brackets are arranged in a circular array. A scraper is fixedly connected to the bottom of the brackets and the scraper is attached to the top of the baffle.

[0015] An operating method for a sodium sulfate solution evaporation crystallization separator, applicable to the sodium sulfate solution evaporation crystallization separator as described above, includes the following steps:

[0016] S1: Sodium sulfate solution is added into the tank through the feed pipe. The sodium sulfate solution entering the tank falls onto the baffle. The first heating wire is activated to heat the sodium sulfate solution on the baffle, causing it to evaporate and crystallize.

[0017] S2: Start the second motor to drive the scraper to rotate and stir the heated sodium sulfate solution. After the sodium sulfate solution evaporates and crystallizes, the hydraulic cylinder controls the baffle to move downward so that the sodium sulfate crystals fall onto the filter plate.

[0018] S3: Start the first motor to control the filter plate to rebound intermittently upwards, causing the sodium sulfate crystals on the filter plate to impact upwards intermittently, thereby breaking up the agglomerates of sodium sulfate crystals.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The sodium sulfate solution evaporation crystallization separator and its operation method described in this invention, through the setting of a guide ring, allows the evaporated steam to float upward and flow upward along the arc surface of the inner wall of the guide ring. The guide ring is heated by a second heating wire to maintain its temperature above the steam dew point. When the steam comes into contact with the inner wall of the guide ring, it will not liquefy but will escape directly upward, avoiding the condensation of water droplets on the inner wall of the guide ring.

[0021] 2. The sodium sulfate solution evaporation crystallization separator and its operation method described in this invention, through the setting of heat dissipation fins, helps to cool the top of the tank, so that the temperature of the top of the tank is always kept below the vapor dew point. The water droplets condensed on the top of the tank fall downward along the arc surface of the top of the tank and accumulate at the inner angle between the tank and the guide ring. Through the setting of the barrier ring, it can effectively prevent the falling water droplets from being heated by the second heating wire and evaporating again.

[0022] 3. The sodium sulfate solution evaporation crystallization separator and its operation method described in this invention, when the sodium sulfate solution enters from the feed pipe, is guided by the inclined surface at the top of the guide block, causing the sodium sulfate solution to flow onto the arc surface of the inner wall of the guide ring, and flow along the arc surface of the inner wall of the guide ring until it falls onto the baffle. When the sodium sulfate solution flows along the arc surface of the inner wall of the guide ring, the heating by the second heating wire can help preheat the sodium sulfate solution and accelerate the heating rate of the sodium sulfate solution by the subsequent baffle.

[0023] 4. The sodium sulfate solution evaporation crystallization separator and its operation method described in this invention, when the steam begins to rise, a blower is started to blow air upward to help accelerate the rising speed of the steam, reduce the contact time between the steam and the inner wall of the guide ring, and further prevent the steam from condensing on the guide ring.

[0024] 5. The sodium sulfate solution evaporation crystallization separator and its operation method described in this invention involve controlling the rotation of a turntable via a first motor, and through the cooperation of a first top block and a second top block, causing the sodium sulfate crystals on the filter plate to continuously impact upwards. When the sodium sulfate crystals impact the crushing teeth, they are broken, thereby breaking up the aggregated sodium sulfate crystals, releasing some of the mother liquor encapsulated within them, and improving the purity of the sodium sulfate crystals. The filter plate can separate the sodium sulfate crystals from the encapsulated mother liquor. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a perspective view of the can body and heat dissipation fins of the present invention in use;

[0027] Figure 2 This is a perspective view of the tank body and the drain pipe of the present invention in use;

[0028] Figure 3 This is an exploded view of the guide ring and baffle used in conjunction with the present invention;

[0029] Figure 4 This is a cross-sectional view of the guide ring and the barrier ring of the present invention used together;

[0030] Figure 5 This is a cross-sectional view of the support plate of the present invention used in conjunction with the first mounting bracket;

[0031] Figure 6 This is a perspective view of the guide ring of the present invention used in conjunction with the second sleeve box;

[0032] Figure 7 This is a perspective view of the filter plate and sliding shaft of the present invention in use;

[0033] Figure 8 This is a cross-sectional view of the barrier ring and heat dissipation fins of the present invention in use;

[0034] Figure 9 This is a perspective view of the crushing teeth and filter plate of the present invention in use;

[0035] Figure 10 This is a perspective view of the support plate and filter plate of the present invention in use;

[0036] Figure 11 This is an exploded view of the stop block and the feed port of the present invention in use;

[0037] Figure 12 This is a cross-sectional view of the guide block and flow guide ring used in conjunction with the present invention.

[0038] In the diagram: 1. Tank body; 2. Feed pipe; 3. Baffle; 4. First casing; 5. First heating wire; 6. Discharge port; 7. Support plate; 8. First mounting bracket; 9. Hydraulic cylinder; 10. Stop block; 11. Sealing door; 12. Guide ring; 13. Drain pipe; 14. Collection bottle; 15. Second casing; 16. Second heating wire; 17. Barrier ring; 18. Heat dissipation fins; 19. Fixed pipe; 20. Second... 21. Mounting bracket; 22. Mounting slot; 23. Fan; 24. Air inlet slot; 25. Feed chute; 26. Sliding shaft; 27. Sliding block; 28. Spring; 29. ​​Filter plate; 30. First motor; 31. Turntable; 32. First top block; 33. Second top block; 34. Second motor; 35. Bracket; 36. Scraper; 37. Connecting pipe; 38. Support leg; 39. Mounting ring; 40. Crushing tooth; 41. Guide block. Detailed Implementation

[0039] 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.

[0040] like Figures 1 to 12 As shown, this embodiment of the invention provides a sodium sulfate solution evaporation crystallization separator, including a tank 1. A feed pipe 2 is provided at the top of the tank 1. A baffle 3 is fixedly connected to the inner wall of the tank 1. The top of the baffle 3 has a concave structure. A first housing 4 is fixedly connected to the bottom of the baffle 3. A first heating wire 5 is fixedly connected to the inner wall of the first housing 4. A discharge port 6 is opened at the center of the baffle 3. A support plate 7 is fixedly connected to the inner wall of the tank 1 below the baffle 3. A first mounting frame 8 is fixedly connected to the middle of the support plate 7. A hydraulic cylinder 9 is fixedly connected inside the first mounting frame 8. The output end of the hydraulic cylinder 9 passes through the top of the first mounting frame 8 and is fixedly connected to a stop block 10. The top of the stop block 10 has a convex surface. The structure includes a top of baffle 10 that fits against the inner wall of discharge port 6, a drain assembly on tank body 1, a sealing door 11 rotatably connected to the outer wall of tank body 1, and several support legs 37 fixedly connected to the bottom of tank body 1. The drain assembly includes a guide ring 12, which is fixedly installed on the inner wall of tank body 1 and located above baffle 3. Both the inner and outer walls of the guide ring 12 are set as annular arc surfaces. Several drain pipes 13 are fixedly connected in an annular array on the outer wall of tank body 1. One end of the drain pipe 13 extends to the inner angle between the outer wall of the guide ring 12 and the inner wall of tank body 1. A collection bottle 14 is set at the center of the bottom of tank body 1, and the other end of the drain pipe 13 extends into the interior of the collection bottle 14.

[0041] Through the above technical solution, the hydraulic cylinder 9 controls the stop block 10 to enter the discharge port 6 and block the discharge port 6. Sodium sulfate solution is added into the tank 1 through the feed pipe 2. The sodium sulfate solution entering the tank 1 falls onto the baffle 3. The first heating wire 5 is activated to heat the sodium sulfate solution on the baffle 3, causing it to evaporate and crystallize. The evaporated vapor floats up and flows upward along the arc surface of the inner wall of the guide ring 12. After flowing to the top of the tank 1, it begins to condense and falls at the inner angle between the tank 1 and the guide ring 12. It is discharged through the drain pipe 13 and collected in the collection bottle 14. After the sodium sulfate solution evaporates and crystallizes, the hydraulic cylinder 9 controls the stop block 10 to move downward. At this time, the discharge port 6 is opened, and the sealing door 11 is opened to facilitate the removal of sodium sulfate crystals.

[0042] Specifically, a second sleeve 15 is fixedly fitted in the middle of the outer wall of the flow guide ring 12, and a second heating wire 16 is fixedly connected to the inner wall of the second sleeve 15. A barrier ring 17 is fixedly connected to the top of the outer wall of the flow guide ring 12. The inner and outer walls of the barrier ring 17 are both set as annular arc surfaces. A guide block 40 is fixedly connected to the bottom of the feed pipe 2. The top and bottom of the guide block 40 are both set as inclined surfaces. Several heat dissipation fins 18 are fixedly connected in a ring array around the feed pipe 2 at the top of the outer wall of the tank body 1.

[0043] Through the above technical solution, when steam flows upward along the arc surface of the inner wall of the guide ring 12, the second heating wire 16 is activated to heat the guide ring 12, maintaining its temperature above the steam dew point. When the steam contacts the inner wall of the guide ring 12, it will not liquefy and will escape directly upward, preventing condensation of water droplets on the inner wall of the guide ring 12. After the steam rises to the top of the tank 1, water droplets begin to condense. The heat dissipation fins 18 help cool the top of the tank 1, keeping the temperature of the top of the tank 1 always below the steam dew point. The water droplets condensed on the top of the tank 1 fall downward along the arc surface of the top of the tank 1, accumulating between the tank 1 and the guide ring. At the inner corner of ring 12, the barrier ring 17 effectively prevents the falling water droplets from being heated by the second heating wire 16 and evaporating again. When the sodium sulfate solution enters from the feed pipe 2, it falls on the top of the guide block 40. Guided by the inclined surface of the top of the guide block 40, the sodium sulfate solution flows to the arc surface of the inner wall of the guide ring 12 and flows along the arc surface of the inner wall of the guide ring 12 until it falls on the baffle 3. When the sodium sulfate solution flows along the arc surface of the inner wall of the guide ring 12, the heating by the second heating wire 16 helps to preheat the sodium sulfate solution and accelerate the heating rate of the sodium sulfate solution by the subsequent baffle 3.

[0044] Specifically, two fixed pipes 19 are symmetrically fixedly connected to the tank body 1. The two fixed pipes 19 are fixedly connected to a second mounting bracket 20 at their close ends. The second mounting bracket 20 is located between the guide ring 12 and the baffle 3. The top of the second mounting bracket 20 is provided with a mounting groove 21. A fan 22 is fixedly connected inside the mounting groove 21. An air inlet groove 23 is provided inside the second mounting bracket 20. The air inlet groove 23 communicates with the mounting groove 21. The close ends of the two fixed pipes 19 are connected to the air inlet groove 23. The far ends of the two fixed pipes 19 extend to the outside of the tank body 1.

[0045] With the above technical solution, when the steam begins to rise, the blower 22 is started to blow air upward to help accelerate the rising speed of the steam, reduce the contact time between the steam and the inner wall of the guide ring 12, and further prevent the steam from condensing on the guide ring 12. When the blower 22 blows air upward, the outside air enters the air inlet slot 23 through two fixed pipes 19.

[0046] Specifically, the top of the support plate 7 is an annular concave structure, and a feeding trough 24 is provided in the middle of the support plate 7 at the lowest point of the concave structure. A crushing assembly is provided below the support plate 7. The crushing assembly includes a filter plate 28, which is slidably connected to the inside of the tank 1 and located below the feeding trough 24. Three sliding shafts 25 are circumferentially fixedly connected to the inner wall of the tank 1 near the filter plate 28. Sliding blocks 26 are slidably connected to the outer walls of the three sliding shafts 25. The three sliding blocks 26 are fixedly connected to the filter plate 28. Springs 27 are sleeved on the outer walls of the three sliding shafts 25. The bottom of the springs 27 is fixedly connected to the tank 1, and the top of the springs 27 is fixedly connected to the corresponding sliding blocks 26. A first motor 29 is fixedly connected inside the first mounting bracket 8. The output end of the machine 29 passes through the bottom of the first mounting frame 8 and is fixedly connected to a turntable 30. The turntable 30 is located above the filter plate 28. Two first top blocks 31 are symmetrically fixedly connected to the bottom of the turntable 30. The bottom of the two first top blocks 31 is set as a symmetrical inclined surface. Two second top blocks 32, corresponding one-to-one with the two first top blocks 31, are symmetrically fixedly connected to the top of the filter plate 28. The top of the two second top blocks 32 is set as a symmetrical inclined surface. The bottom of the inner wall of the tank 1 is a concave structure. A connecting pipe 36 is fixedly connected to the center of the bottom of the tank 1. The top and bottom of the connecting pipe 36 are respectively connected to the inside of the tank 1 and the inside of the collection bottle 14. A mounting ring 38 is fixedly connected to the bottom of the support plate 7. A crushing tooth 39 is fixedly connected to the bottom of the mounting ring 38.

[0047] Through the above technical solution, after sodium sulfate crystals fall from the feed port 6, they are guided by the convex structure at the top of the baffle 10, causing them to fall onto the concave structure at the top of the support plate 7. The sodium sulfate crystals on the support plate 7 then fall along the concave structure at the top of the support plate 7 from the feed trough 24 and accumulate on the filter plate 28. The first motor 29 is started, driving the turntable 30 to rotate, causing the two first top blocks 31 to rotate. When the first top block 31 rotates to a position close to the second top block 32, the inclined surface at the bottom of the first top block 31 presses against the inclined surface at the top of the second top block 32. Under the pressure of the first top block 31, the second top block 32 is pushed downward, causing the filter plate 28 to move downward, which in turn moves the slider 26 downward, compressing the spring 27. When the first top block 31 rotates to a position away from the second top block 32, due to the loss of the pressure from the first top block 31, the filter plate 28 is compressed by the spring 27. The upward rebound causes the sodium sulfate crystals on the filter plate 28 to impact upwards, engaging with the crushing teeth 39 at the bottom of the mounting ring 38. When the sodium sulfate crystals impact and strike the crushing teeth 39, they are crushed, releasing some of the mother liquor trapped inside and increasing the purity of the sodium sulfate crystals. Simultaneously, the upward impact of the filter plate 28 also vibrates and disperses the sodium sulfate crystals that fall from the feed trough 24 and accumulate on the filter plate 28, making them more loose (therefore, the sodium sulfate crystals will not clog the holes of the filter plate 28), facilitating full contact with the crushing teeth 39 when impacted upwards later, thereby further improving the crushing efficiency and effect. The sodium sulfate crystals are filtered through the filter plate 28, and the mother liquor passes through the filter plate 28 and enters the collection bottle 14 along the connecting pipe 36. The remaining sodium sulfate crystals remain on the filter plate 28 and can be removed by opening the sealing door 11.

[0048] Specifically, a second motor 33 is fixedly connected inside the second mounting bracket 20. The output end of the second motor 33 passes through the bottom of the second mounting bracket 20 and is fixedly connected to several brackets 34. The several brackets 34 are arranged in a ring array. A scraper 35 is fixedly connected to the bottom of the bracket 34 and the scraper 35 is attached to the top of the baffle 3.

[0049] Through the above technical solution, when the sodium sulfate solution is heated on the baffle 3, the second motor 33 is started to drive the scraper 35 to rotate, thereby stirring the heated sodium sulfate solution and improving the heating efficiency. When sodium sulfate crystals precipitate, by controlling the rotation of the scraper 35, the sodium sulfate crystals on the baffle 3 can be removed, preventing the sodium sulfate crystals from adhering to the baffle 3. The bottom of the scraper 35 is made of a high-temperature resistant elastic material, which can not only ensure the stirring of the sodium sulfate solution, but also prevent sodium sulfate crystals from adsorbing onto the surface of the baffle 3.

[0050] An operating method for a sodium sulfate solution evaporation crystallization separator, applicable to the sodium sulfate solution evaporation crystallization separator as described above, includes the following steps:

[0051] S1: Sodium sulfate solution is added into tank 1 through feed pipe 2. The sodium sulfate solution entering tank 1 falls onto baffle 3. The first heating wire 5 is activated to heat the sodium sulfate solution on baffle 3, causing it to evaporate and crystallize.

[0052] S2: Start the second motor 33 to drive the scraper 35 to rotate and stir the heated sodium sulfate solution. After the sodium sulfate solution evaporates and crystallizes, the hydraulic cylinder 9 controls the stop block 10 to move downward so that the sodium sulfate crystals fall onto the filter plate 28.

[0053] S3: Start the first motor 29 to control the filter plate 28 to rebound intermittently, which in turn causes the sodium sulfate crystals on the filter plate 28 to impact upwards intermittently, thereby breaking up the agglomerates of sodium sulfate crystals.

[0054] In operation, the hydraulic cylinder 9 controls the stop block 10 to block the discharge port 6. Sodium sulfate solution is fed into the tank 1 through the feed pipe 2. As the solution enters through the feed pipe 2, it falls onto the top of the guide block 40. Guided by the inclined surface at the top of the guide block 40, the solution flows onto the arc surface of the inner wall of the guide ring 12 and along this surface until it falls onto the baffle 3. As the solution flows along the arc surface of the guide ring 12, the second heating wire 16 helps preheat it, accelerating the heating rate of the solution by the baffle 3. The first heating wire 5 is activated to heat the solution on the baffle 3, causing it to evaporate and crystallize. The second motor 33 is then activated, driving the scraper 35 to rotate. The heated sodium sulfate solution is stirred to improve heating efficiency. The evaporated steam rises and flows upward along the arc surface of the inner wall of the guide ring 12. When the steam flows upward along the arc surface of the inner wall of the guide ring 12, the second heating wire 16 is activated to heat the guide ring 12 and maintain its temperature above the steam dew point. The steam will not liquefy when it comes into contact with the inner wall of the guide ring 12 and will escape directly upward, avoiding the formation of water droplets on the inner wall of the guide ring 12. After the steam rises to the top of the tank 1, water droplets begin to condense. The heat dissipation fins 18 help cool the top of the tank 1, keeping the temperature of the top of the tank 1 always below the steam dew point. The water droplets condensed on the top of the tank 1 fall downward along the arc surface of the top of the tank 1 and accumulate at the inner angle between the tank 1 and the guide ring 12, falling onto the tank. Condensate at the angle between body 1 and the inner wall of guide ring 12 is discharged through drain pipe 13 and collected in collection bottle 14. The barrier ring 17 effectively prevents falling water droplets from being heated by the second heating wire 16 and evaporating again. As steam begins to rise, fan 22 is activated to blow air upwards, accelerating the steam's ascent and reducing the contact time between the steam and the inner wall of guide ring 12, further preventing condensation on the guide ring 12. After the sodium sulfate solution evaporates and crystallizes, hydraulic cylinder 9 controls the baffle 10 to move downwards, opening the discharge port 6. By controlling the scraper 35 to rotate, the sodium sulfate crystals on baffle 3 are displaced, preventing them from adhering to the baffle 3. After the sodium sulfate crystals fall from discharge port 6... Guided by the convex structure at the top of the baffle 10, sodium sulfate crystals fall onto the concave structure at the top of the support plate 7. These crystals then fall from the feed chute 24 along the concave structure and accumulate on the filter plate 28. The first motor 29 is activated, causing the turntable 30 to rotate, which in turn rotates the two first top blocks 31. When the first top block 31 rotates close to the second top block 32, the inclined surface at the bottom of the first top block 31 presses against the inclined surface at the top of the second top block 32. Under the pressure of the first top block 31, the second top block 32 is pushed downwards, causing the filter plate 28 to move downwards, which in turn moves the slider 26 downwards, compressing the spring 27. When the first top block 31 rotates away from the second top block 32, the pressure from the first top block 31 is lost.Under the action of spring 27, filter plate 28 rebounds upward, causing the sodium sulfate crystals on filter plate 28 to impact upward. This impact, combined with the crushing teeth 39 at the bottom of mounting ring 38, breaks the aggregated sodium sulfate crystals upon impact, releasing some of the mother liquor trapped within. This increases the purity of the sodium sulfate crystals. The mother liquor, after passing through filter plate 28, flows along connecting pipe 36 into collection bottle 14, reducing the moisture content within the sodium sulfate crystals. The remaining sodium sulfate crystals remain on filter plate 28 and can be removed by opening sealing door 11.

[0055] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0056] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 limiting the scope of protection of this invention.

[0057] 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 the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sodium sulfate solution evaporation crystallization separator, characterized in that, The container includes a tank (1), with a feed pipe (2) at the top. A baffle (3) is fixedly connected to the inner wall of the tank (1). The top of the baffle (3) is concave. A first sleeve (4) is fixedly connected to the bottom of the baffle (3). A first heating wire (5) is fixedly connected to the inner wall of the first sleeve (4). A discharge port (6) is opened at the center of the baffle (3). A support plate (7) is fixedly connected to the inner wall of the tank (1) below the baffle (3). The middle part of the support plate (7) is fixedly connected to the support plate (7). A first mounting bracket (8) is fixedly connected to the first mounting bracket (8), and a hydraulic cylinder (9) is fixedly connected inside the first mounting bracket (8). The output end of the hydraulic cylinder (9) passes through the top of the first mounting bracket (8) and is fixedly connected to a stop block (10). The top of the stop block (10) is a convex structure. The top of the stop block (10) is in contact with the inner wall of the discharge port (6). A drain assembly is provided on the tank body (1). A sealing door (11) is rotatably connected to the outer wall of the tank body (1). Several support legs (37) are fixedly connected to the bottom of the tank body (1). The drainage assembly includes a guide ring (12), which is fixedly installed on the inner wall of the tank (1) and located above the baffle (3). The inner and outer walls of the guide ring (12) are both set as annular arc surfaces. Several drainage pipes (13) are fixedly connected in an annular array on the outer wall of the tank (1). One end of the drainage pipe (13) extends to the inner angle between the outer wall of the guide ring (12) and the inner wall of the tank (1). A collection bottle (14) is provided at the bottom center of the tank (1). The other end of the drainage pipe (13) extends into the interior of the collection bottle (14). The middle of the outer wall of the guide ring (12) is fixedly fitted with a second sleeve (15), the inner wall of the second sleeve (15) is fixedly connected with a second heating wire (16), the top of the outer wall of the guide ring (12) is fixedly connected with a barrier ring (17), the inner wall and the outer wall of the barrier ring (17) are both set as annular arc surfaces, the bottom of the feed pipe (2) is fixedly connected with a guide block (40), the top and bottom of the guide block (40) are both set as inclined surfaces; The top of the outer wall of the tank (1) is fixedly connected with several heat dissipation fins (18) in a ring array centered on the feed pipe (2).

2. The sodium sulfate solution evaporation crystallization separator according to claim 1, characterized in that, Two fixed pipes (19) are symmetrically fixedly connected to the tank (1). The two fixed pipes (19) are fixedly connected to a second mounting bracket (20) at their close ends. The second mounting bracket (20) is located between the guide ring (12) and the baffle (3). The top of the second mounting bracket (20) is provided with a mounting groove (21). A fan (22) is fixedly connected inside the mounting groove (21). An air inlet groove (23) is provided inside the second mounting bracket (20). The air inlet groove (23) is connected to the mounting groove (21). The close ends of the two fixed pipes (19) are connected to the air inlet groove (23). The far ends of the two fixed pipes (19) extend to the outside of the tank (1).

3. The sodium sulfate solution evaporation crystallization separator according to claim 2, characterized in that, The top of the support plate (7) is an annular concave structure, and a feeding trough (24) is provided in the middle of the support plate (7) and at the lowest point of the concave structure. A crushing component is provided below the support plate (7).

4. The sodium sulfate solution evaporation crystallization separator according to claim 3, characterized in that, The crushing assembly includes a filter plate (28), which is slidably connected inside the tank (1) and located below the feed chute (24). Three sliding shafts (25) are circumferentially fixedly connected to the inner wall of the tank (1) near the filter plate (28). Sliding blocks (26) are slidably connected to the outer walls of the three sliding shafts (25). The three sliding blocks (26) are fixedly connected to the filter plate (28). Springs (27) are sleeved on the outer walls of the three sliding shafts (25). The bottom of the springs (27) is fixedly connected to the tank (1), and the top of the springs (27) is fixedly connected to the corresponding sliding blocks (26). A first motor (29) is fixedly connected inside the first mounting bracket (8). The output end of the first motor (29) passes through... A turntable (30) is fixedly connected to the bottom of the first mounting bracket (8). The turntable (30) is located above the filter plate (28). Two first top blocks (31) are symmetrically fixedly connected to the bottom of the turntable (30). The bottom of the two first top blocks (31) is set as a symmetrical inclined surface. Two second top blocks (32) corresponding to the two first top blocks (31) are symmetrically fixedly connected to the top of the filter plate (28). The top of the two second top blocks (32) is set as a symmetrical inclined surface. The bottom of the inner wall of the tank (1) is a concave structure. A connecting pipe (36) is fixedly connected to the center of the bottom of the tank (1). The top and bottom of the connecting pipe (36) are respectively connected to the inside of the tank (1) and the inside of the collection bottle (14).

5. A sodium sulfate solution evaporation crystallization separator according to claim 4, characterized in that, The bottom of the support plate (7) is fixedly connected to an installation ring (38), and the bottom of the installation ring (38) is fixedly connected to a breaking tooth (39).

6. A sodium sulfate solution evaporation crystallization separator according to claim 5, characterized in that, The second mounting bracket (20) is internally fixedly connected to a second motor (33). The output end of the second motor (33) passes through the bottom of the second mounting bracket (20) and is fixedly connected to several brackets (34). The several brackets (34) are arranged in a ring array. The bottom of the brackets (34) is fixedly connected to a scraper (35), and the scraper (35) is attached to the top of the baffle (3).

7. An operating method for a sodium sulfate solution evaporation crystallization separator, the operating method being applicable to the sodium sulfate solution evaporation crystallization separator as described in claim 6, characterized in that: The steps for this operation are as follows: S1: Sodium sulfate solution is added into tank (1) through feed pipe (2). The sodium sulfate solution entering tank (1) falls onto baffle (3). The first heating wire (5) is started to heat the sodium sulfate solution on baffle (3) so that it evaporates and crystallizes. S2: Start the second motor (33) to drive the scraper (35) to rotate and stir the heated sodium sulfate solution. After the sodium sulfate solution evaporates and crystallizes, the hydraulic cylinder (9) controls the stop block (10) to move downward so that the sodium sulfate crystals fall onto the filter plate 28. S3: Start the first motor (29) to control the filter plate (28) to rebound intermittently, which in turn causes the sodium sulfate crystals on the filter plate (28) to impact upwards intermittently, thereby breaking up the agglomerates of sodium sulfate crystals.

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