A desulfurized wastewater salt extraction system

Abstract

The present invention belongs to the technical field of industrial saline wastewater treatment, and discloses a salt extraction system for desulfurization wastewater, including an evaporation tank main body. One side of the evaporation tank main body is fixedly connected with an air inlet, the other side of the evaporation tank main body is fixedly connected with a feed inlet, a heat conduction cavity is opened inside the evaporation tank main body, and a discharge outlet is fixedly connected to the bottom of the evaporation tank main body. By starting the drive motor, the drive motor drives the rotation of the rotating shaft. While the rotating shaft rotates, it drives the homogeneous plate, the mounting column, the first arc-shaped stirring rod, the first stirring rod and the second arc-shaped stirring rod to rotate, continuously stirring the desulfurization wastewater inside, thereby promoting the heat transfer of the heating and cooling device to the material, making the temperature of the material uniform, promoting the processes of dissolution, crystallization and aggregation at the same time, accelerating the rate of salt precipitation, and improving the working efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial saline wastewater treatment, and specifically relates to a salt extraction system for desulfurization wastewater. Background Art

[0002] Desulfurization wastewater is a kind of toxic and difficult-to-degrade industrial wastewater, which has a wide range of sources, including multiple industries such as chemical industry, petroleum, and pharmaceutical industry. These wastewaters contain a large amount of soluble salts such as chlorides, sulfates, and carbonates, posing a major threat to the environment and human health. Therefore, it has become particularly urgent to effectively treat high-salt wastewater and recover the resources in it as much as possible. The processing process of desulfurization wastewater mainly includes steps such as pretreatment, main treatment, high-efficiency evaporation, biological treatment, post-treatment, and concentration crystallization.

[0003] However, there are often some problems in the high-efficiency evaporation process of the existing desulfurization wastewater salt extraction system: First, in the existing desulfurization wastewater salt extraction process, high-salt wastewater is usually added to an evaporation tank and then heated at a high temperature to make the internal wastewater boil and evaporate, so as to precipitate the salts in it. During the precipitation process, only by heating at a high temperature to make it boil and then precipitate the salts, the crystallization efficiency is low, and the heat transfer rate is low at the beginning of heating, affecting the working efficiency; Second, when crystals are precipitated at a high temperature, the precipitated crystals will have a certain adhesiveness and are extremely easy to adhere to the inner wall of the evaporation tank. It is not easy to clean them when they adhere. If they adhere to the inner wall for a long time, it will greatly aggravate the corrosion of the inner wall, reduce the service life of the evaporation tank, and cause a certain impact during the discharging process. Summary of the Invention

[0004] The purpose of the present invention is to provide a salt extraction system for desulfurization wastewater to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A desulfurized wastewater salt extraction system, including an evaporation tank main body, one side of the evaporation tank main body is fixedly connected with an air inlet, the other side of the evaporation tank main body is fixedly connected with a feed inlet, a heat conduction cavity is opened inside the evaporation tank main body, the bottom of the evaporation tank main body is fixedly connected with a discharge port, the top of the evaporation tank main body is fixedly connected with a fixed column, the top of the fixed column is fixedly connected with a driving motor, the output end of the driving motor is fixedly connected with a rotating shaft, both sides of the rotating shaft are respectively fixedly connected with a plurality of homogenizing plates, the bottom of the rotating shaft is fixedly connected with a mounting column, both sides of the mounting column are respectively fixedly connected with a first arc-shaped stirring rod, the tops of the two first arc-shaped stirring rods are respectively fixedly connected with a first stirring rod, both sides of the two first stirring rods are respectively fixedly connected with two second arc-shaped stirring rods, the second arc-shaped stirring rods are respectively fixedly connected with the top of one first stirring rod and the bottom of the other first stirring rod, the two second arc-shaped stirring rods are arranged in a staggered manner, a first fitting groove is opened at two-thirds of the two second arc-shaped stirring rods, a cleaning component is arranged on one side of the first stirring rod, and a vibration component is arranged inside the evaporation tank main body.

[0006] Preferably, the cleaning component includes a fixed rod, the fixed rod is fixedly connected with the first stirring rod, one side of the fixed rod is fixedly connected with a scraper, and a second fitting groove is opened on one side of the scraper.

[0007] Preferably, the vibration component includes two limit blocks, both of the limit blocks are fixedly connected to one side inside the heat conduction cavity, a sliding column is slidably connected to the middle of the two limit blocks, one side of the middle of the sliding column is fixedly connected with a sliding rod, a sliding groove is opened inside the evaporation tank main body corresponding to the sliding distance of the sliding rod, two limit plates are fixedly connected to the outside of the sliding column, the limit plates slide inside the heat conduction cavity, one side of the two limit plates is fixedly connected with a spring, the spring is sleeved on the outside of the sliding column, one side of the spring is fixedly connected with a fixing plate, the fixing plate is fixedly connected with the evaporation tank main body, the limit plate, spring and fixing plate on the other side are arranged in a mirror image, and a knocking head is fixedly connected to the top of the sliding column.

[0008] Preferably, the opening distance of the sliding groove is the same as the distance from the top of the second arc-shaped stirring rod to the first fitting groove, and the radian of the first arc-shaped stirring rod is the same as the radian of the bottom of the evaporation tank main body.

[0009] Preferably, the inclined side of the scraper is attached to the inner wall of the evaporation tank main body, and a gap is left between the second arc-shaped stirring rod and the inner wall of the evaporation tank main body.

[0010] Preferably, the sliding rods are respectively arranged corresponding to the first fitting groove and the second fitting groove, and the sliding rods are located in the middle of the second fitting groove when not moving.

[0011] Preferably, multiple said homogenizing plates are all inclined, the inclination angle of the homogenizing plate is 45°, and the inclination directions of the homogenizing plates in the same group are opposite.

[0012] Preferably, one side of the top of the evaporation tank body is fixedly connected with an air pipe, one end of the air pipe is fixedly connected with a condenser, an installation frame is arranged at the bottom of the condenser, a support frame is fixedly connected to the top of the installation frame, the support frame is fixedly connected with the condenser, a water storage tank is fixedly connected inside the installation frame, a water guide pipe is fixedly connected to the bottom of one side of the condenser, one end of the water guide pipe is fixedly connected with the water storage tank, and a water outlet is fixedly connected to the bottom of the water storage tank.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. By starting the driving motor, the driving motor drives the rotating shaft to rotate. When the rotating shaft rotates, it drives the homogenizing plate, the mounting column, the first arc-shaped stirring rod, the first stirring rod and the second arc-shaped stirring rod to rotate. By driving the homogenizing plate, the mounting column, the first arc-shaped stirring rod, the first stirring rod and the second arc-shaped stirring rod to rotate simultaneously, the desulfurization wastewater inside is continuously stirred, thereby promoting the heat transfer of the material, making the temperature of the material uniform, promoting the processes of dissolution, crystallization and coagulation at the same time, accelerating the rate of salt precipitation, and improving the working efficiency.

[0015] 2. By rotating the homogenizing plate and the second arc-shaped stirring rod, due to the setting of their inclined surfaces, the irregularly piled salts will be evenly leveled, making the internal space reasonably utilized. During the process of salt precipitation, the density of the salt-containing wastewater is large, and it will accumulate at the bottom of the wastewater due to gravity. As more and more salts are precipitated, and because the homogenizing plate and the second arc-shaped stirring rod level the precipitated salts, the precipitated salts will be evenly accumulated at the bottom of the tank body, thereby reducing the contact area with the hot air. At this time, the rotation of the first arc-shaped stirring rod, the first stirring rod and the second arc-shaped stirring rod will stir the piled salts, so that they can better contact the internal hot air, and thus the salts can be better precipitated.

[0016] 3. In the discharging process of the present invention, the rotation of the rotating shaft drives the scraper to rotate. The rotation of the scraper can scrape and clean the inner wall of the evaporation tank body, preventing salt from adhering to the inner wall of the evaporation tank body and causing corrosion inside. At the same time, the rotation of the second arc-shaped stirring rod presses the sliding rod, and the sliding rod moves downward along the arc of the second arc-shaped stirring rod. The movement of the sliding rod causes the spring to contract. When the sliding rod moves along the inclined surface of the second arc-shaped stirring rod to the first fitting groove, the pressing force of the second arc-shaped stirring rod on it is lost. After the spring is not stressed, it pops out, and the spring pop-up drives the knocking head to impact the limiting block, thereby vibrating the evaporation tank body, so as to shake off the salt adhering to the inner wall, greatly reducing the adhesion of salt on the inner wall, thus reducing the corrosion of the inner wall by salt, improving the service life of the evaporation tank, and being able to accelerate the discharging speed during the discharging process and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a transverse sectional view of the evaporation tank body of the present invention;

[0019] Figure 3 is a longitudinal sectional view of the evaporation tank body of the present invention;

[0020] Figure 4 is a schematic diagram of the structure of the mounting column of the present invention;

[0021] Figure 5 For the present invention Figure 2 is an enlarged view of the structure at A in;

[0022] Figure 6 For the present invention Figure 3 is an enlarged view of the structure at B in.

[0023] In the figure: 1. Evaporation tank body; 2. Air inlet; 201. Feed inlet; 202. Heat conduction cavity; 3. Discharge outlet; 4. Fixed column; 5. Driving motor; 6. Rotating shaft; 7. Homogenizing plate; 8. Mounting column; 9. First arc-shaped stirring rod; 10. First stirring rod; 11. Second arc-shaped stirring rod; 12. First fitting groove; 13. Fixed rod; 14. Scraper; 15. Second fitting groove; 16. Limiting block; 17. Sliding column; 18. Sliding rod; 1801. Chute; 19. Limiting plate; 20. Spring; 21. Fixed plate; 22. Knocking head; 23. Air pipe; 24. Condenser; 25. Mounting frame; 26. Support frame; 27. Water storage tank; 28. Water guide pipe; 29. Water outlet. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1 to 6 shown, the embodiment of the present invention provides a desulfurized wastewater salt extraction system, which includes an evaporation tank main body 1. One side of the evaporation tank main body 1 is fixedly connected with an air inlet 2, and the other side of the evaporation tank main body 1 is fixedly connected with a feed inlet 201. A heat conduction cavity 202 is opened inside the evaporation tank main body 1. The bottom of the evaporation tank main body 1 is fixedly connected with a discharge port 3. The top of the evaporation tank main body 1 is fixedly connected with a fixed column 4. The top of the fixed column 4 is fixedly connected with a driving motor 5. The output end of the driving motor 5 is fixedly connected with a rotating shaft 6. Both sides of the rotating shaft 6 are respectively fixedly connected with a plurality of homogenizing plates 7. The bottom of the rotating shaft 6 is fixedly connected with a mounting column 8. Both sides of the mounting column 8 are respectively fixedly connected with a first arc-shaped stirring rod 9. The tops of the two first arc-shaped stirring rods 9 are respectively fixedly connected with a first stirring rod 10. Both sides of the two first stirring rods 10 are respectively fixedly connected with two second arc-shaped stirring rods 11. The second arc-shaped stirring rods 11 are respectively fixedly connected with the top of one first stirring rod 10 and the bottom of the other first stirring rod 10. The two second arc-shaped stirring rods 11 are arranged in a staggered manner. First matching grooves 12 are opened at two-thirds of the two second arc-shaped stirring rods 11. A cleaning component is arranged on one side of the first stirring rod 10. A vibration component is arranged inside the evaporation tank main body 1. High-temperature steam is injected into the heat conduction cavity 202 through the air inlet 2. The high-temperature steam is transferred to the inside of the evaporation tank main body 1 through heat transfer to heat the inside of the evaporation tank main body 1. During the heating process, by starting the driving motor 5, the driving motor 5 drives the rotating shaft 6 to rotate. When the rotating shaft 6 rotates, it drives the homogenizing plates 7, the mounting column 8, the first arc-shaped stirring rods 9, the first stirring rods 10 and the second arc-shaped stirring rods 11 to rotate. By driving the rotation of the rotating shaft 6, the homogenizing plates 7, the mounting column 8, the first arc-shaped stirring rods 9, the first stirring rods 10 and the second arc-shaped stirring rods 11 rotate to continuously stir the desulfurized wastewater inside, thereby promoting the heat transfer of the heating and cooling device to the material, making the temperature of the material uniform, and at the same time promoting the processes of dissolution, crystallization and aggregation, accelerating the rate of salt precipitation and improving the working efficiency.

[0026] Among them, the cleaning component includes a fixed rod 13. The fixed rod 13 is fixedly connected with the first stirring rod 10. One side of the fixed rod 13 is fixedly connected with a scraping plate 14. A second matching groove 15 is opened on one side of the scraping plate 14. By the rotation of the rotating shaft 6, the scraping plate 14 will be driven to rotate. The rotation of the scraping plate 14 can scrape and clean the inner wall of the evaporation tank main body 1 to prevent salt from adhering to the inner wall of the evaporation tank main body 1 and causing corrosion inside.

[0027] Among them, the vibration component includes two limit blocks 16. Both of the two limit blocks 16 are fixedly connected to one side inside the heat conduction cavity 202. A sliding column 17 is slidably connected to the middle of the two limit blocks 16. One side of the middle of the sliding column 17 is fixedly connected to a sliding rod 18. A chute 1801 is opened inside the evaporation tank main body 1 corresponding to the sliding distance of the sliding rod 18. Two limit plates 19 are fixedly connected to the outside of the sliding column 17. The limit plates 19 slide inside the heat conduction cavity 202. One side of the two limit plates 19 is fixedly connected to a spring 20. The spring 20 is sleeved on the outside of the sliding column 17. One side of the spring 20 is fixedly connected to a fixing plate 21. The fixing plate 21 is fixedly connected to the evaporation tank main body 1. The limit plate 19, the spring 20 and the fixing plate 21 on the other side are all arranged in a mirror image. The top of the sliding column 17 is fixedly connected to a knocking head 22. When the second arc-shaped stirring rod 11 rotates, it will press the sliding rod 18. The sliding rod 18 will move downward along the arc of the second arc-shaped stirring rod 11. The downward movement of the sliding rod 18 drives the sliding column 17 to move downward. The downward movement of the sliding column 17 will drive the limit plate 19 to move downward. The downward movement of the limit plate 19 will press the spring 20 to contract. When the sliding rod 18 moves along the inclined surface of the second arc-shaped stirring rod 11 to the first mating groove 12, the pressing of the second arc-shaped stirring rod 11 on it is lost, and the spring 20 pops out. The popping out of the spring 20 drives the limit plate 19 to pop out. The popping out of the limit plate 19 drives the sliding column 17 and the sliding rod 18 to pop out. The popping out of the sliding column 17 drives the top of the fixing plate 21 to impact the limit block 16, so as to vibrate the evaporation tank main body 1, thereby shaking off the salt adhering to the inner wall, greatly reducing the adhesion of salt on the inner wall, thereby reducing the corrosion of the inner wall by salt, improving the service life of the evaporation tank, and being able to accelerate its discharging speed during the discharging process, improving the working efficiency.

[0028] Among them, the opening distance of the chute 1801 is the same as the distance from the top of the second arc-shaped stirring rod 11 to the first mating groove 12. The radian of the first arc-shaped stirring rod 9 is the same as the radian of the bottom of the evaporation tank main body 1. The same opening distance of the chute 1801 as the distance from the top of the second arc-shaped stirring rod 11 to the first mating groove 12 can enable the sliding rod 18 to better complete the movement during the process of being driven by the second arc-shaped stirring rod 11 without being blocked. The same radian of the first arc-shaped stirring rod 9 as the radian of the bottom of the evaporation tank main body 1 can prevent friction with the inside of the evaporation tank main body 1 during rotation, thereby reducing its service life.

[0029] ​Among them, the inclined side of the scraper 14 is in contact with the inner wall of the evaporation tank body 1, and there is a gap between the second arc-shaped stirring rod 11 and the inner wall of the evaporation tank body 1. The contact between the scraper 14 and the inner wall enables the scraper 14 to clean the inner wall during rotation. The gap left by the second arc-shaped stirring rod 11 prevents the second arc-shaped stirring rod 11 from contacting the inner wall during rotation, increasing friction and thus reducing its service life. At the same time, although there is a certain gap between the second arc-shaped stirring rod 11 and the inner wall without contact, the sliding rod 18 can cooperate with the second arc-shaped stirring rod 11 to complete vibration.

[0030] Among them, the sliding rod 18 is respectively arranged corresponding to the first fitting groove 12 and the second fitting groove 15. When the sliding rod 18 is not moving, it is in the middle of the second fitting groove 15, enabling the second fitting groove 15 to drive the sliding rod 18 to move through its inclined side during rotation. At the same time, when the sliding rod 18 moves to the first fitting groove 12, it can pop out without the pressure of the inclined surface and return to the position corresponding to the second fitting groove 15. At this time, the second fitting groove 15 is rotating and has not rotated back to the position corresponding to the sliding rod 18. When the second fitting groove 15 rebounds to the position corresponding to the second fitting groove 15, the scraper 14 just rotates to the position corresponding to the sliding rod 18. After the second fitting groove 15 continues to move and the sliding rod 18 passes through the second fitting groove 15, the sliding rod 18 continues to cooperate with the second arc-shaped stirring rod 11 to complete the cycle, and the evaporation tank body 1 can be continuously vibrated.

[0031] Among them, multiple homogenizing plates 7 are all inclined, the inclination angle of the homogenizing plate 7 is 45°, and the inclination directions of the homogenizing plates 7 in the same group are opposite. The opposite inclination directions of the homogenizing plates 7 in the same group can better contact the salt, improving the paving angle of the salt. At the same time, when the desulfurized wastewater enters the evaporation tank body 1, its inclined setting can increase the contact surface with the desulfurized wastewater, resulting in better stirring effect.

[0032] Among them, one side of the top of the evaporation tank body 1 is fixedly connected with an air pipe 23. One end of the air pipe 23 is fixedly connected with a condenser 24. There is an installation frame 25 at the bottom of the condenser 24. The top of the installation frame 25 is fixedly connected with a support frame 26, and the support frame 26 is fixedly connected with the condenser 24. A water storage tank 27 is fixedly connected inside the installation frame 25. One side of the bottom of the condenser 24 is fixedly connected with a water guide pipe 28. One end of the water guide pipe 28 is fixedly connected with the water storage tank 27. The bottom of the water storage tank 27 is fixedly connected with a water outlet 29. By processing the steam through the air pipe 23 and the condenser 24 and flowing it into the water storage tank 27 through the water guide pipe 28, solid-liquid separation is achieved, enabling the desulfurized wastewater to separate salt and water, and thus extracting the salt.

[0033] Working principle:

[0034] During the working process, the desulfurized wastewater is injected into the interior of the evaporation tank body 1 through the feed port 201. After the injection is completed, high-temperature steam is injected into the heat conduction cavity 202 through the air inlet 2. The high-temperature steam is transferred to the interior of the evaporation tank body 1 through heat transfer, heating the interior of the evaporation tank body 1. During the heating process, by starting the driving motor 5, the driving motor 5 starts to drive the rotating shaft 6 to rotate. When the rotating shaft 6 rotates, it drives the homogenizing plate 7, the mounting column 8, the first arc-shaped stirring rod 9, the first stirring rod 10 and the second arc-shaped stirring rod 11 to rotate. By rotating the rotating shaft 6 and driving the homogenizing plate 7, the mounting column 8, the first arc-shaped stirring rod 9, the first stirring rod 10 and the second arc-shaped stirring rod 11 to rotate, the desulfurized wastewater inside is continuously agitated, thereby promoting the heat transfer of the material, making the temperature of the material uniform, promoting the processes of dissolution, crystallization and coagulation at the same time, accelerating the rate of salt precipitation, and improving the working efficiency;

[0035] After the salt is precipitated, it will adhere inside the evaporation tank body 1. And due to the rotation of the homogenizing plate 7, the mounting column 8, the first arc-shaped stirring rod 9, the first stirring rod 10 and the second arc-shaped stirring rod 11, the salt will accumulate to a certain extent on both sides, while the middle part will be vacant. During this process, the internal space cannot be reasonably used. At this time, the rotating homogenizing plate 7 and the second arc-shaped stirring rod 11 will evenly pave the irregularly accumulated salt due to the setting of their inclined surfaces, making the internal space reasonably utilized. During the process of salt precipitation, the density of the salt-containing wastewater is relatively large, so it will accumulate at the bottom due to gravity. As more and more salt is precipitated, and because the homogenizing plate 7 and the second arc-shaped stirring rod 11 flatten the precipitated salt, the precipitated salt will be evenly accumulated at the bottom of the tank body, thereby reducing the contact area with the hot air. At this time, the rotation of the first arc-shaped stirring rod 9, the first stirring rod 10 and the second arc-shaped stirring rod 11 will agitate the accumulated salt, so that it can better contact with the internal hot air, and thus the salt can be better precipitated;

[0036] After the salt precipitation is completed, during the discharging process, the rotation of the rotating shaft 6 drives the scraper 14 to rotate. The rotation of the scraper 14 can scrape and clean the inner wall of the evaporation tank body 1, preventing salt from adhering to the inner wall of the evaporation tank body 1 and causing corrosion inside. At the same time, the rotation of the second arc-shaped stirring rod 11 presses the sliding rod 18. The sliding rod 18 moves downward along the arc of the second arc-shaped stirring rod 11. The downward movement of the sliding rod 18 drives the sliding column 17 to move downward. The downward movement of the sliding column 17 drives the limiting plate 19 to move downward. The downward movement of the limiting plate 19 presses the spring 20 to contract. When the sliding rod 18 moves along the inclined surface of the second arc-shaped stirring rod 11 to the first mating groove 12, the pressing of the second arc-shaped stirring rod 11 on it is lost, and the spring 20 pops out. The spring 20 popping out drives the limiting plate 19 to pop out. The limiting plate 19 popping out drives the sliding column 17 and the sliding rod 18 to pop out. The sliding column 17 popping out drives the knocking head 22 to impact the limiting block 16, so that the evaporation tank body 1 vibrates, thereby shaking off the salt adhering to the inner wall, greatly reducing the adhesion of salt on the inner wall, thereby reducing the corrosion of the inner wall by salt, improving the service life of the evaporation tank, and being able to accelerate the discharging speed during the discharging process and improve work efficiency.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A salt extraction system for desulfurized wastewater, comprising an evaporation tank main body (1), one side of the evaporation tank main body (1) is fixedly connected with an air inlet (2), the other side of the evaporation tank main body (1) is fixedly connected with a feed inlet (201), a heat conduction cavity (202) is arranged inside the evaporation tank main body (1), the bottom of the evaporation tank main body (1) is fixedly connected with a discharge outlet (3), the top of the evaporation tank main body (1) is fixedly connected with a fixed column (4), and the top of the fixed column (4) is fixedly connected with a driving motor (5), characterized in that: The output end of the driving motor (5) is fixedly connected with a rotating shaft (6). On both sides of the rotating shaft (6), a plurality of homogenizing plates (7) are fixedly connected respectively. At the bottom of the rotating shaft (6), a mounting post (8) is fixedly connected. On both sides of the mounting post (8), a first arc-shaped stirring rod (9) is fixedly connected respectively. At the top of the two first arc-shaped stirring rods (9), a first stirring rod (10) is fixedly connected respectively. On both sides of the two first stirring rods (10), two second arc-shaped stirring rods (11) are fixedly connected respectively. The second arc-shaped stirring rods (11) are fixedly connected with the top of one of the first stirring rods (10) and the bottom of the other first stirring rod (10) respectively. The two second arc-shaped stirring rods (11) are arranged staggeredly. At two-thirds of the two second arc-shaped stirring rods (11), a first fitting groove (12) is provided respectively. A cleaning component is arranged on one side of the first stirring rod (10). A vibration component is arranged inside the evaporation tank main body (1). The cleaning component includes a fixed rod (13). The fixed rod (13) is fixedly connected with the first stirring rod (10). On one side of the fixed rod (13), a scraping plate (14) is fixedly connected. On one side of the scraping plate (14), a second fitting groove (15) is provided. The vibration component includes two limiting blocks (16). The two limiting blocks (16) are fixedly connected to one side inside the heat conduction cavity (202). A sliding column (17) is slidably connected to the middle of the two limiting blocks (16). On one side of the middle of the sliding column (17), a sliding rod (18) is fixedly connected. A sliding groove (1801) is provided inside the evaporation tank main body (1) corresponding to the sliding distance of the sliding rod (18). On the outer side of the sliding column (17), two limiting plates (19) are fixedly connected. The limiting plates (19) slide inside the heat conduction cavity (202). On one side of the two limiting plates (19), a spring (20) is fixedly connected. The spring (20) is sleeved on the outer side of the sliding column (17). On one side of the spring (20), a fixing plate (21) is fixedly connected. The fixing plate (21) is fixedly connected with the evaporation tank main body (1). The limiting plate (19), spring (20) and fixing plate (21) on the other side are arranged in a mirror image. At the top of the sliding column (17), a knocking head (22) is fixedly connected.

2. The salt extraction system for desulfurized wastewater according to claim 1, wherein: The opening distance of the sliding groove (1801) is the same as the distance from the top of the second arc-shaped stirring rod (11) to the first fitting groove (12). The radian of the first arc-shaped stirring rod (9) is the same as the radian of the bottom of the evaporation tank main body (1).

3. The desulfurized wastewater salt extraction system according to claim 2, characterized in that: The inclined side of the scraping plate (14) is attached to the inner wall of the evaporation tank main body (1). There is a gap between the second arc-shaped stirring rod (11) and the inner wall of the evaporation tank main body (1).

4. The desulfurized wastewater salt extraction system according to claim 3, wherein: The sliding rod (18) is correspondingly arranged with the first fitting groove (12) and the second fitting groove (15). When the sliding rod (18) is not moving, it is in the middle of the second fitting groove (15).

5. The salt extraction system for desulfurized wastewater according to claim 4, wherein: The plurality of homogenizing plates (7) are all inclined. The inclination angle of the homogenizing plates (7) is 45°. The inclination directions of the homogenizing plates (7) in the same group are opposite.

6. The salt extraction system for desulfurized wastewater according to claim 5, characterized in that: One side of the top of the evaporation tank main body (1) is fixedly connected with an air pipe (23). One end of the air pipe (23) is fixedly connected with a condenser (24). The bottom of the condenser (24) is provided with a mounting frame (25). The top of the mounting frame (25) is fixedly connected with a support frame (26). The support frame (26) is fixedly connected with the condenser (24). Inside the mounting frame (25) is fixedly connected with a water storage tank (27). One side of the bottom of the condenser (24) is fixedly connected with a water guide pipe (28). One end of the water guide pipe (28) is fixedly connected with the water storage tank (27). The bottom of the water storage tank (27) is fixedly connected with a water outlet (29).

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