A high-efficiency concentrating evaporator for sodium sulfate crystals

Abstract

The application relates to the technical field of evaporators, in particular to a high-efficiency concentration evaporator for sodium sulfate crystals, which comprises a liquid distribution assembly arranged in a heat exchange pipe and used for controlling liquid inlet speed and liquid film thickness; a pressing plate arranged at the top of the heat exchange pipe and used for driving the liquid distribution assembly, wherein the top of the pressing plate is provided with a hydraulic rod; and a stirring assembly arranged in a separation chamber, wherein the adjustable stirring rod is arranged; after sodium sulfate solution is heated, the sodium sulfate solution flows into the separation chamber along the heat exchange pipe, then the adjustable stirring rod is driven by the stirring shaft to stir the sodium sulfate solution, in the stirring process, the driven gear drives the rotating rod to rotate, the rotating rod drives the driving wheel to rotate, so that the two adjusting assemblies walk in the opposite directions along the rotating rod, when the two adjusting assemblies approach each other, the second movable stirring rod is deflected, the first movable stirring rod moves outward, and the stirring range is changed.

Description

Technical Field

[0001] This invention relates to the field of evaporator technology, and more specifically to a high-efficiency concentration evaporator for sodium sulfate crystals. Background Technology

[0002] Sodium sulfate (Na₂SO₄) is widely used in chemical, pharmaceutical, printing and dyeing, and papermaking industries, and is an important chemical raw material. Concentration and crystallization are key steps in the production of sodium sulfate. Currently, falling film evaporation involves adding the feed liquid from the upper tube box of the heating chamber of the falling film evaporator. The feed liquid is evenly distributed into each heat exchange tube and flows down the inner wall of the heat exchange tubes in a uniform film. During the flow of the feed liquid, it is heated and vaporized by the heating medium. The generated vapor and liquid phase enter the separation chamber of the evaporator together. After thorough separation, the vapor enters the condenser and condenses before entering the next effect evaporator as the heating medium, thus achieving multi-effect operation. The liquid phase is discharged from the separation chamber.

[0003] Existing separation chambers are equipped with stirring mechanisms, which typically use a motor to drive a stirring shaft and a stirring rod mounted on the shaft to agitate the sodium sulfate solution. However, the stirring range of the stirring mechanism in existing evaporation and concentration equipment is usually fixed, and the direction and state of the sodium sulfate solution flow within the chamber are also relatively fixed, which is not conducive to improving heat transfer efficiency. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a highly efficient concentration evaporator for sodium sulfate crystals.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A high-efficiency concentration evaporator for sodium sulfate crystals includes a tank body, a feeding hopper inside the tank body, a heat exchange chamber at the bottom of the feeding hopper, heat exchange tubes inside the heat exchange chamber, a separation chamber at the bottom of the heat exchange chamber, a feed pipe at the top of the feeding hopper, a steam inlet pipe on the side wall of the heat exchange chamber, and a discharge pipe at the bottom of the separation chamber. The evaporator also includes:

[0007] The liquid distribution assembly, located inside the heat exchange tube, is used to control the liquid inlet rate and liquid film thickness;

[0008] A pressure plate, located at the top of the heat exchange tube, is used to drive the liquid distribution assembly. A hydraulic rod is provided at the top of the pressure plate.

[0009] A stirring assembly, located in the separation chamber, is used to stir the sodium sulfate solution;

[0010] The stirring assembly includes a stirring shaft located in the separation chamber, an adjustable stirring rod on the stirring shaft, and two adjustment components on the stirring shaft, which are respectively connected to the two ends of the adjustable stirring rod.

[0011] Furthermore, a top plate is provided at the top of the stirring shaft, and a toothed groove is provided in the top plate. A rotating rod is provided on one side of the stirring shaft. The two ends of the rotating rod are fixedly connected to the stirring shaft through a connecting frame. A driven gear that meshes with the toothed groove is provided at the top of the rotating rod. A sliding rod is also provided on one side of the stirring shaft, and the adjusting component is slidably connected to the sliding rod.

[0012] Furthermore, the adjustable stirring rod includes a first movable stirring rod, with second movable stirring rods rotatably disposed at both ends of the first movable stirring rod. A limit slider is rotatably disposed at the end of the second movable stirring rod away from the first movable stirring rod. The limit slider is sleeved on the stirring shaft and is fixedly connected to the adjustment component.

[0013] Furthermore, the adjustment assembly includes a movable platform slidably connected to the slide rod. The movable platform is fixedly connected to the limiting slider via a mounting plate. A fixed rotating shaft is rotatably mounted on the movable platform. A drive wheel connected to the rotating rod is mounted at the bottom of the fixed rotating shaft. The drive wheel and the rotating rod are inclined. A deflection assembly fitted onto the fixed rotating shaft is mounted on the movable platform. Multiple stops are also mounted on the slide rod, and the deflection assembly is located between the stops.

[0014] Furthermore, the deflection assembly includes a first deflection rod sleeved on a fixed rotating shaft, a second deflection rod fixedly connected to the fixed rotating shaft at the bottom of the first deflection rod, a tensioning assembly between the first deflection rod and the second deflection rod, first limiting rods fixed to the movable platform at both sides of the first deflection rod, and second limiting rods fixed to the movable platform at both sides of the second deflection rod.

[0015] Furthermore, the tensioning assembly includes a first protrusion fixed to the first deflection rod and a second protrusion fixed to the second deflection rod. A first sleeve is fitted on the first protrusion, and a second sleeve is fitted on the second protrusion. A return spring is provided between the first sleeve and the second sleeve.

[0016] Furthermore, a heating layer is provided on the outside of the separation chamber, and a preheating layer is provided on the outside of the feeding hopper. A first connecting pipe connected to the heat exchange chamber is provided on one side of the heating layer, and a second connecting pipe connected to the preheating layer is provided on the other side of the heating layer.

[0017] Furthermore, the liquid distribution assembly includes an elastic sleeve located inside the heat exchange tube. The elastic sleeve is connected to the heat exchange tube via a mounting bracket. A sleeve rod is fixedly installed inside the elastic sleeve. A base plate is installed at the bottom end of the sleeve rod. A drive rod is slidably installed inside the sleeve rod. A fixed rod connected to a pressure plate is installed at the top end of the drive rod. A movable rod is rotatably installed on the drive rod. An expansion plate connected to the movable rod is installed on the outer side of the base plate.

[0018] Furthermore, the side wall of the sleeve rod is provided with a sliding groove, the bottom plate is provided with a movable groove, the bottom end of the drive rod is provided with a lifting slider that slides in the sliding groove, one end of the movable rod is rotatably connected to the lifting slider, the other end of the movable rod is rotatably provided with a push rod, the push rod slides in the movable groove, a connecting rod is fixedly provided on the push rod, and the connecting rod passes through the bottom plate and is fixedly connected to the expansion plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. This invention features an adjustable stirring rod. After the sodium sulfate solution is heated, it flows into the separation chamber along the heat exchange tube. The stirring shaft drives the adjustable stirring rod to stir the sodium sulfate solution. During the stirring process, a driven gear drives a rotating rod to rotate, which in turn drives a drive wheel. This causes two adjusting components to move in opposite directions along the rotating rod. When the two adjusting components approach each other, the second movable stirring rod deflects, and the first movable stirring rod moves outward, changing the stirring range. When the two adjusting components approach each other again, they are blocked by a stop block, changing their direction and causing them to move away from each other. This periodic change in the stirring rod improves stirring efficiency.

[0021] 2. The present invention also provides a liquid distribution component inside the heat exchange tube. The liquid distribution component can change its inner diameter, thereby adjusting the distance between the elastic sleeve and the heat exchange tube, changing the flow rate of the sodium sulfate solution, and also changing the thickness of the liquid film. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the heat exchange tube of the present invention;

[0025] Figure 3 This is a schematic diagram of the liquid distribution assembly of the present invention;

[0026] Figure 4 This is a schematic diagram showing the connection between the lifting slider and the expansion plate of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the stirring assembly of the present invention;

[0028] Figure 6 This is a schematic diagram of the adjustable stirring rod of the present invention;

[0029] Figure 7 This is a schematic diagram of the connection between the slide bar and the stirring shaft of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the adjustment component of the present invention;

[0031] Figure 9 This is a schematic diagram showing the connection between the movable platform and the limiting slider of the present invention.

[0032] In the diagram: 1. Tank body; 11. Feeding hopper; 12. Heat exchange chamber; 121. Heat exchange tube; 13. Separation chamber; 14. Feed pipe; 15. Steam inlet pipe; 16. Discharge pipe; 17. Heating layer; 171. First connecting pipe; 172. Second connecting pipe; 18. Preheating layer; 2. Liquid distribution assembly; 20. Mounting bracket; 201. Fixing rod; 21. Elastic sleeve; 22. Sleeve rod; 23. Base plate; 24. Drive rod; 241. Lifting slider; 25. Movable rod; 251. Push rod; 252. Connecting rod; 26. Expansion plate; 3. Pressure plate; 31. Hydraulic rod; 4. Stirring assembly; 41. Top plate; 42. 43. Stirring shaft; 431. Adjustable stirring rod; 432. First movable stirring rod; 433. Second movable stirring rod; 434. Limiting slider; 45. Rotating rod; 46. Driven gear; 47. Slide rod; 461. Stop block; 47. Adjusting assembly; 471. Movable platform; 4711. Mounting plate; 472. Fixed rotating shaft; 473. Drive wheel; 474. First deflection rod; 4741. First protrusion; 4742. First sleeve; 475. Second deflection rod; 4751. Second protrusion; 4752. Second sleeve; 476. First limiting rod; 477. Second limiting rod; 478. Return spring. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] Reference Figures 1-9As shown, a high-efficiency concentration evaporator for sodium sulfate crystals includes a tank body 1, a feeding hopper 11 inside the tank body 1, a heat exchange chamber 12 at the bottom of the feeding hopper 11, heat exchange tubes 121 inside the heat exchange chamber 12, a separation chamber 13 at the bottom of the heat exchange chamber 12, a feed pipe 14 at the top of the feeding hopper 11, a steam inlet pipe 15 on the side wall of the heat exchange chamber 12, and a discharge pipe 16 at the bottom of the separation chamber 13. It also includes:

[0036] Liquid distribution assembly 2 is installed inside heat exchange tube 121. Liquid distribution assembly 2 can change its inner diameter, thereby changing the distance between liquid distribution assembly 2 and heat exchange tube 121, which is used to control the liquid inlet speed and liquid film.

[0037] The pressure plate 3 is set on the top of the heat exchange tube 121 and is used to control the size of the liquid distribution assembly 2. The top of the pressure plate 3 is equipped with a hydraulic rod 31, which can push the pressure plate 3 up and down to adjust the inner diameter of the liquid distribution assembly 2 and change the distance between the liquid distribution assembly 2 and the heat exchange tube 121.

[0038] The stirring assembly 4 is installed in the separation chamber 13. After the sodium sulfate solution undergoes heat exchange, it flows into the separation chamber 13 from the heat exchange tube 121, and then the stirring assembly 4 can be used to stir the sodium sulfate solution.

[0039] The stirring assembly 4 includes a stirring shaft 42 located in the separation chamber 13, an adjustable stirring rod 43 is provided on the stirring shaft 42, and two adjusting components 47 are also provided on the stirring shaft 42. The adjusting components 47 can be provided with a sealed protective shell on the outside, and the two adjusting components 47 are respectively connected to the two ends of the adjustable stirring rod 43.

[0040] When the stirring shaft 42 rotates, the adjustable stirring rod 43 can be driven by the adjusting component 47 to make periodic changes, which is beneficial to the overall stirring efficiency.

[0041] In one embodiment, a top plate 41 is provided on the top of the stirring shaft 42, and a toothed groove is provided in the top plate 41. A rotating rod 44 is provided on one side of the stirring shaft 42. The two ends of the rotating rod 44 are fixedly connected to the stirring shaft 42 through a connecting frame. A driven gear 45 that meshes with the toothed groove is provided at the top of the rotating rod 44. A sliding rod 46 is also provided on one side of the stirring shaft 42. The adjusting component 47 is slidably connected to the sliding rod 46.

[0042] When the stirring shaft 42 rotates, it can drive the rotating rod 44 to rotate together. When the rotating rod 44 rotates, the driven gear 45 at its top will rotate along the tooth groove of the top plate 41, realizing the rotation of the rotating rod 44. After the rotating rod 44 rotates, it can drive the adjusting component 47 to slide along the slide rod 46, thereby driving the adjustable stirring rod 43 to make periodic changes.

[0043] In one embodiment, the adjustable stirring rod 43 includes a first movable stirring rod 431, and a second movable stirring rod 432 is rotatably provided at both ends of the first movable stirring rod 431. A limit slider 433 is rotatably provided at one end of the second movable stirring rod 432 away from the first movable stirring rod 431. The limit slider 433 is sleeved on the stirring shaft 42 and is fixedly connected to the adjustment component 47.

[0044] The first movable stirring rods 431 at both ends will deflect under the action of the adjusting components 47. That is, the two limiting sliders 433 will move closer to each other under the action of the two adjusting components 47, thereby pushing the first movable stirring rods 431 to move outward. After the two limiting sliders 433 move closer to each other to a certain distance, they will move back and move away from each other. At this time, the first movable stirring rods 431 will move inward again. This process is repeated, so that the adjustable stirring rods 43 will change periodically.

[0045] In one embodiment, the adjustment assembly 47 includes a movable platform 471 slidably connected to the slide rod 46. The movable platform 471 is fixedly connected to the limiting slider 433 via a mounting plate 4711. A fixed rotating shaft 472 is rotatably mounted on the movable platform 471. A drive wheel 473 connected to the rotating rod 44 is provided at the bottom of the fixed rotating shaft 472. The drive wheel 473 is inclined to the rotating rod 44. A deflection assembly is provided on the movable platform 471 and fitted onto the fixed rotating shaft 472. A plurality of stops 461 are also provided on the slide rod 46, and the deflection assembly is located between the stops 461.

[0046] When the rotating rod 44 rotates, it drives the drive wheel 473 to rotate. Since the drive wheel 473 is tilted, taking the drive wheel 473 as an example, when its tilt direction is downward, the entire adjustment assembly 47 can be driven to move downward along the rotating rod 44. After moving a certain distance, the deflection assembly will contact the stop block 461. Under the blocking and squeezing of the stop block 461, the deflection assembly will deflect, thereby causing the drive wheel 473 to rotate, so that the tilt direction becomes upward. At this time, the entire adjustment assembly 47 can be driven to move back.

[0047] In one embodiment, the deflection assembly includes a first deflection rod 474 sleeved on a fixed rotating shaft 472, a second deflection rod 475 fixedly connected to the fixed rotating shaft 472 at the bottom of the first deflection rod 474, a tensioning assembly between the first deflection rod 474 and the second deflection rod 475, first limiting rods 476 fixed to a movable platform 471 on both sides of the first deflection rod 474, and second limiting rods 477 fixed to a movable platform 471 on both sides of the second deflection rod 475.

[0048] When the moving platform 471 moves along the slide bar 46, when the first deflection rod 474 contacts the stop block 461, it will be blocked and squeezed by the stop block 461, causing the first deflection rod 474 to rotate to the other side. At this time, the first deflection rod 474 will pull the second deflection rod 475 to rotate to the other side through the tensioning component. The second deflection rod 475 will change the tilt direction of the drive wheel 473 through the fixed rotating shaft 472, allowing the drive wheel 473 to move back and forth along the rotating rod 44.

[0049] In one embodiment, the tensioning assembly includes a first protrusion 4741 fixed to a first deflection rod 474 and a second protrusion 4751 fixed to a second deflection rod 475. A first sleeve 4742 is sleeved on the first protrusion 4741 and a second sleeve 4752 is sleeved on the second protrusion 4751. A return spring 478 is provided between the first sleeve 4742 and the second sleeve 4752.

[0050] When the first deflection rod 474 rotates due to being blocked by the stop block 461, it stretches the return spring 478. At this time, the movable platform 471 continues to move. After the first deflection rod 474 rotates beyond the center line of the movable platform 471, the position of the return spring 478 also changes and moves to the other side. At this time, since the return spring 478 is in a stretched state and the first deflection rod 474 has also rotated to the other side and is no longer blocked, the first deflection rod 474 will directly contact the first limit rod 476 on the other side under the elastic force of the return spring 478. At the same time, the second deflection rod 475 will also rotate from the second limit rod 477 on one side to the second limit rod 477 on the other side under the elastic force of the return spring 478, completing the overall deflection and thus changing the tilt direction of the drive wheel 473.

[0051] In one embodiment, a heating layer 17 is sleeved on the outside of the separation chamber 13, and a preheating layer 18 is sleeved on the outside of the feeding hopper 11. A first connecting pipe 171 connected to the heat exchange chamber 12 is provided on one side of the heating layer 17, and a second connecting pipe 172 connected to the preheating layer 18 is provided on the other side of the heating layer 17. A pump body is provided in the preheating layer 18, which can draw steam and water from the heating layer 17 into the preheating layer 18.

[0052] The sodium sulfate solution is first heated in the heat exchange chamber 12 and then flows into the separation chamber 13. At this time, the steam used earlier will also move back into the heating layer 17 to reheat the sodium sulfate solution in the separation chamber 13, providing sufficient heat. At the same time, some of the steam will also be converted into water flow and finally flow to the preheating layer 18, using the residual heat of the water flow to preheat the sodium sulfate solution initially.

[0053] In one embodiment, since the solution is often unevenly distributed in each heat exchange tube 121, resulting in poor film formation in the heat exchange tube 121, a liquid distribution assembly 2 is provided in the heat exchange tube 121. The liquid distribution assembly 2 includes an elastic sleeve 21 located in the heat exchange tube 121. The elastic sleeve 21 is connected to the heat exchange tube 121 through a mounting bracket 20. A sleeve rod 22 is fixedly provided in the elastic sleeve 21. A base plate 23 is provided at the bottom end of the sleeve rod 22. A drive rod 24 is slidably provided in the sleeve rod 22. A fixed rod 201 connected to a pressure plate 3 is provided at the top end of the drive rod 24. A movable rod 25 is rotatably provided on the drive rod 24. An expansion plate 26 connected to the movable rod 25 is provided on the outside of the base plate 23.

[0054] After the solution enters the feeding hopper 11, the pressure plate 3 can be pushed down by the hydraulic rod 31. The pressure plate 3 will drive the drive rod 24 to move down. The drive rod 24 will push the surrounding movable rods 25 to deflect, thereby pushing the expansion plate 26 to open outward. The elastic sleeve 21 will also open outward, changing the distance between the elastic sleeve 21 and the inner wall of the heat exchange tube 121, thereby adjusting the liquid feeding speed and the thickness of the liquid film.

[0055] In one embodiment, the side wall of the sleeve rod 22 is provided with a sliding groove, the bottom plate 23 is provided with a movable groove, the bottom end of the drive rod 24 is provided with a lifting slider 241 that slides in the sliding groove, one end of the movable rod 25 is rotatably connected to the lifting slider 241, the other end of the movable rod 25 is rotatably provided with a push rod 251, the push rod 251 slides in the movable groove, and a connecting rod 252 is fixedly provided on the push rod 251, the connecting rod 252 passes through the bottom plate 23 and is fixedly connected to the expansion plate 26;

[0056] When the drive rod 24 moves downward, it pushes the lifting slider 241. The lifting slider 241 causes the surrounding movable rods 25 to deflect, so that the other end of the movable rods 25 pushes the push rod 251. The push rod 251 then pushes the expansion plate 26 outward through the connecting rod 252, thereby changing the inner diameter of the liquid distribution assembly 2.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A high-efficiency concentration evaporator for sodium sulfate crystals, comprising a tank (1), wherein a feeding hopper (11) is provided inside the tank (1), a heat exchange hopper (12) is provided at the bottom of the feeding hopper (11), a heat exchange tube (121) is provided inside the heat exchange hopper (12), a separation chamber (13) is provided at the bottom of the heat exchange hopper (12), a feed pipe (14) is provided at the top of the feeding hopper (11), and a discharge pipe (16) is provided at the bottom of the separation chamber (13), characterized in that, Also includes: The liquid distribution assembly (2) is installed inside the heat exchange tube (121) and is used to control the liquid inlet speed and liquid film thickness. A pressure plate (3) is set on the top of the heat exchange tube (121) for driving the liquid distribution assembly (2). A hydraulic rod (31) is set on the top of the pressure plate (3). The stirring assembly (4) is located inside the separation chamber (13); The stirring assembly (4) includes a stirring shaft (42), an adjustable stirring rod (43) is provided on the stirring shaft (42), and two adjustment components (47) are also provided on the stirring shaft (42), with the two adjustment components (47) respectively connected to the two ends of the adjustable stirring rod (43); The top of the stirring shaft (42) is provided with a top plate (41), and a toothed groove is provided in the top plate (41). A rotating rod (44) is provided on one side of the stirring shaft (42). The two ends of the rotating rod (44) are fixedly connected to the stirring shaft (42) through a connecting frame. A driven gear (45) that meshes with the toothed groove is provided at the top of the rotating rod (44). A sliding rod (46) is also provided on one side of the stirring shaft (42). The adjustable stirring rod (43) includes a first movable stirring rod (431), and a second movable stirring rod (432) is rotatably provided at both ends of the first movable stirring rod (431). A limit slider (433) is rotatably provided at the end of the second movable stirring rod (432) away from the first movable stirring rod (431). The limit slider (433) is sleeved on the stirring shaft (42), and the limit slider (433) is fixedly connected to the adjustment component (47). The adjustment assembly (47) includes a movable platform (471) slidably connected to the slide bar (46). The movable platform (471) is fixedly connected to the limiting slider (433) via the mounting plate (4711). A fixed rotating shaft (472) is rotatably arranged on the movable platform (471). A drive wheel (473) connected to the rotating rod (44) is arranged at the bottom of the fixed rotating shaft (472). The drive wheel (473) is inclined to the rotating rod (44). A deflection assembly is provided on the movable platform (471) and fitted onto the fixed rotating shaft (472). A plurality of stops (461) are also provided on the slide bar (46), and the deflection assembly is located between the stops (461). The deflection assembly includes a first deflection rod (474) sleeved on a fixed rotating shaft (472), a second deflection rod (475) fixedly connected to the fixed rotating shaft (472) at the bottom of the first deflection rod (474), a tensioning assembly between the first deflection rod (474) and the second deflection rod (475), first limiting rods (476) fixed on the movable platform (471) on both sides of the first deflection rod (474), and second limiting rods (477) fixed on the movable platform (471) on both sides of the second deflection rod (475). After being blocked and squeezed by the stop block (461), the first deflection rod (474) rotates to the other side. The first deflection rod (474) pulls the second deflection rod (475) to rotate to the other side through the tensioning assembly. The second deflection rod (475) changes the tilt direction of the drive wheel (473) through the fixed rotating shaft (472), so that the drive wheel (473) moves back and forth along the rotating rod (44), thereby driving the two adjusting components (47) to slide back and forth towards or away from each other.

2. The high-efficiency concentration evaporator for sodium sulfate crystals according to claim 1, characterized in that, The tensioning assembly includes a first protrusion (4741) fixed on a first deflection rod (474) and a second protrusion (4751) fixed on a second deflection rod (475). A first sleeve (4742) is fitted on the first protrusion (4741), and a second sleeve (4752) is fitted on the second protrusion (4751). A return spring (478) is provided between the first sleeve (4742) and the second sleeve (4752).

3. The high-efficiency concentration evaporator for sodium sulfate crystals according to claim 1, characterized in that, The heat exchange chamber (12) is provided with a steam inlet pipe (15) on its side wall. The separation chamber (13) is provided with a heating layer (17) on its outer side. The feeding hopper (11) is provided with a preheating layer (18) on its outer side. A first connecting pipe (171) connected to the heat exchange chamber (12) is provided on one side of the heating layer (17), and a second connecting pipe (172) connected to the preheating layer (18) is provided on the other side of the heating layer (17).

4. The high-efficiency concentration evaporator for sodium sulfate crystals according to claim 1, characterized in that, The liquid distribution assembly (2) includes an elastic sleeve (21) located inside the heat exchange tube (121). The elastic sleeve (21) is connected to the heat exchange tube (121) via a mounting bracket (20). A sleeve rod (22) is fixedly installed inside the elastic sleeve (21). A base plate (23) is installed at the bottom end of the sleeve rod (22). A drive rod (24) is slidably installed inside the sleeve rod (22). A fixed rod (201) connected to a pressure plate (3) is installed at the top end of the drive rod (24). A movable rod (25) is rotatably installed on the drive rod (24). An expansion plate (26) connected to the movable rod (25) is installed on the outside of the base plate (23).

5. The high-efficiency concentration evaporator for sodium sulfate crystals according to claim 4, characterized in that, The sleeve rod (22) has a sliding groove on its side wall and a movable groove on its base plate (23). The bottom end of the drive rod (24) is provided with a lifting slider (241) that slides in the sliding groove. One end of the movable rod (25) is rotatably connected to the lifting slider (241). The other end of the movable rod (25) is rotatably provided with a push rod (251). The push rod (251) slides in the movable groove. A connecting rod (252) is fixedly provided on the push rod (251). The connecting rod (252) passes through the base plate (23) and is fixedly connected to the expansion plate (26).

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