Low-temperature drying treatment device for salt-mixed wastewater

Abstract

The utility model discloses a salt-mixed wastewater low-temperature drying treatment device which comprises an operation table, an outer cylinder is fixed to the middle of the top of the operation table, an inner cylinder is fixed to the inner side wall of the outer cylinder, a cavity structure is formed between the outer cylinder and the inner cylinder, a circular plate is slidably connected to the inner side wall of the inner cylinder, and a rotating shaft is rotatably connected to the middle of the top of the circular plate. A cylinder cover is arranged at the top of the inner cylinder and arranged on the outer side wall of the rotating shaft in a sleeving mode, lifting mechanisms for lifting the cylinder cover are arranged at the two ends of the top of the operation table, and a rotating mechanism for rotating the rotating shaft is arranged at the top of the cylinder cover. Through the design of the clamping mechanism, the arc-shaped scrapers can be independently replaced without overall replacement, the maintenance cost is reduced, the production efficiency is improved, the two arc-shaped scrapers are close to each other through the reset mechanism, the two arc-shaped scrapers are gradually away from the inner side wall of the inner cylinder and do not make contact with the inner side wall of the inner cylinder any more, the abrasion speed of the arc-shaped scrapers is reduced, and the service life of the arc-shaped scrapers is prolonged. And the service life of the arc-shaped scraper is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mixed salt wastewater treatment technology, and in particular to a low-temperature drying treatment device for mixed salt wastewater. Background Technology

[0002] Mixed-salt wastewater refers to wastewater containing multiple salts, typically originating from industries such as industrial production, mining, chemical processing, and salt making. This type of wastewater has a complex composition, potentially containing various salts such as sodium chloride, sodium sulfate, potassium chloride, and sodium nitrate. In the coal chemical industry, drum scraper dryers are commonly used to treat mixed-salt centrifugal mother liquor. The principle of this equipment is to evenly distribute the slurry on the drum surface, forming a film. Heat inside the drum is conducted to the film through the outer wall of the drum. Through evaporation and diffusion, moisture within the film is transferred outwards. As the drum rotates, when the moisture content within the film reaches the required value, a scraper close to the drum surface scrapes off the film. The material is then further crushed according to the product particle size requirements to obtain granular solid products.

[0003] In traditional low-temperature drying equipment for mixed brine wastewater, the scraper is typically connected to the mixing system, keeping it constantly rotating and in contact with the inner wall of the drum. This continuous friction between the scraper and the inner wall accelerates wear. This constant friction not only reduces the scraper's lifespan but can also affect drying efficiency, as a worn scraper may not effectively remove material from the drum wall. Furthermore, the fixed connection between the scraper and the mixing system means that replacing the scraper requires replacing the entire mixing system. This design increases the complexity and cost of maintenance and replacement, wasting manpower and resources and potentially leading to prolonged downtime, thus impacting production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a low-temperature drying device for mixed salt wastewater.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A low-temperature drying device for mixed salt wastewater includes an operating platform. An outer cylinder is fixed to the center of the top of the operating platform. An inner cylinder is fixed to the inner wall of the outer cylinder, and the space between the outer and inner cylinders is a cavity. A circular plate is slidably connected to the inner wall of the inner cylinder. A rotating shaft, also a cavity structure, is rotatably connected to the center of the top of the circular plate. A cover is provided at the top of the inner cylinder and fits onto the outer wall of the rotating shaft. Lifting mechanisms for raising and lowering the cover are provided at both ends of the top of the operating platform. A rotating mechanism for rotating the rotating shaft is provided at the top of the cover. An inflation mechanism for inflating the rotating shaft is also provided at the top of the cover. Four sleeves are symmetrically fixed to the side wall of the rotating shaft, with one end of each sleeve communicating with the rotating shaft. Circular sliders are slidably connected to the inner walls of each of the four sleeves. A connecting rod is fixed to one end of each of the four circular sliders, and one end of each connecting rod passes through the other end of one of the four sleeves. Each of the four sleeves has a reset mechanism on its inner sidewall for resetting the circular slider. One end of each pair of connecting rods is fixed to the same vertical plate. The outer sidewalls of both vertical plates are equipped with arc-shaped scrapers. The symmetrical ends of the sidewalls of the two arc-shaped scrapers are equipped with snap-fit ​​mechanisms for engaging the scrapers. A water tank is fixed to the bottom of the operating platform. The water tank contains a water supply mechanism for supplying water to the cavity and a temperature control mechanism for controlling the temperature. The bottom of the cylinder cover is equipped with an air extraction mechanism for evacuating the inner cylinder. During use, the snap-fit ​​mechanism allows for individual replacement of the arc-shaped scrapers, eliminating the need for overall replacement, thus reducing maintenance costs and improving production efficiency. The reset mechanism brings the two arc-shaped scrapers closer together, causing them to gradually move away from the inner sidewall of the inner cylinder, reducing wear and extending the service life of the arc-shaped scrapers.

[0007] Preferably, the locking mechanism includes a rectangular base, which is fixed to the side wall of one of the arc-shaped scrapers. A second sliding groove is provided at the top of the rectangular base, and the second sliding groove has a constricted opening. A rectangular slider is slidably connected to the inner side wall of the second sliding groove. A rectangular column is fixed to the top of the rectangular slider. A first spring is provided inside the second sliding groove, and the first spring is located below the rectangular slider. A rectangular hole is provided on the side wall of one of the vertical plates, and the rectangular hole is adapted to the rectangular base. When the arc-shaped scraper needs to be replaced, the four rectangular columns are pressed, causing the four rectangular sliders to move downwards along the inner side walls of the four second sliding grooves until all four rectangular columns are fully inserted into the four second sliding grooves. Then, the four rectangular bases are pulled out from the four rectangular holes. This allows for individual replacement of the arc-shaped scraper without replacing the entire scraper, reducing replacement costs, avoiding prolonged equipment downtime, and thus improving production efficiency.

[0008] Preferably, the temperature control mechanism includes a thermoelectric cooler. A through groove is provided at the bottom of the water tank, and the thermoelectric cooler is fixed to the inner wall of the through groove. Multiple fins are fixed linearly at equal intervals on the cold end of the thermoelectric cooler. The water delivery mechanism includes a water pump, which is fixed to the bottom of the water tank. A first connecting pipe is fixed to the outlet of the water pump, and one end of the first connecting pipe is connected to the cavity. Multiple third connecting pipes are fixed circularly at equal intervals on the outer wall of the outer cylinder. One end of each of the multiple third connecting pipes is connected to the cavity, and the other end of each of the multiple third connecting pipes is connected to the water tank. When the thermoelectric cooler is set to a specified value, its hot end temperature rises rapidly to the specified value after being energized, heating the water to the specified temperature. The water pump, in conjunction with the first connecting pipe, pumps the warm water into the cavity, raising the internal temperature of the inner cylinder. This allows for low-temperature evaporation treatment of the mixed salt wastewater. When the cavity is full of warm water, the excess warm water enters the water tank through the multiple third connecting pipes for recirculation and heating.

[0009] Preferably, the lifting mechanism includes a connecting seat fixed to one end of the top of the operating platform. A first sliding groove is formed on the inner sidewall of the connecting seat. A lead screw is rotatably connected to the top of the first sliding groove, and a lead screw nut is slidably connected to the inner sidewall of the first sliding groove. The lead screw nut is sleeved on the sidewall of the lead screw, and the lead screw nut and the lead screw are compatible. A connecting plate is fixed to the sidewall of the lead screw nut, and one end of the connecting plate is fixed to the cylinder cover. A second motor is fixed to the top of the connecting seat, and the output shaft of the second motor is fixed to the lead screw. The rotating mechanism includes a first motor fixed to the top of the cylinder cover. A first bevel gear is sleeved on the output shaft of the first motor, and a second bevel gear is sleeved on the outer sidewall of the rotating shaft, and the second bevel gear and the first bevel gear are compatible. The inflation mechanism includes a high-pressure blower, which is fixed to the top of the cylinder cover. A second connecting pipe is fixed to the outlet of the high-pressure blower. A rotary joint is installed at one end of the rotating shaft, and the rotary joint is connected to one end of the second connecting pipe. The reset mechanism includes a second spring, which is sleeved on the side wall of one of the connecting rods and located inside one of the sleeves. The suction mechanism includes a suction pump, which is fixed to the top of the cylinder cover. A fourth connecting pipe is fixed to the inlet of the suction pump, and one end of the fourth connecting pipe passes through the bottom of the cylinder cover. During evaporation, the suction pump, in conjunction with the fourth connecting pipe, extracts the evaporated water vapor from the inner cylinder, improving the efficiency of moisture removal, and drives the first motor to rotate the first bevel gear. The second conical gear drives the rotating shaft to rotate, which in turn drives the four sleeves, four vertical plates, four connecting rods, and four arc-shaped scrapers to rotate, thus agitating the mixed salt wastewater. This increases internal convection and heat transfer, facilitating faster evaporation of moisture during low-temperature drying. When scraping and cleaning the inner wall of the inner cylinder is required, a high-pressure blower, in conjunction with the second connecting pipe, inflates the rotating shaft. Air enters the four sleeves, and the four circular sliders move away from each other along the inside of the sleeves, causing the four connecting rods to move away from each other in pairs. This, combined with the two vertical plates, causes the two arc-shaped scrapers to move away from each other, ensuring that both scrapers contact the inner wall of the inner cylinder for cleaning. At this point, all four second springs are compressed. When there is no need to scrape and clean the inner wall of the inner cylinder, the shaft is no longer inflated. Under the reaction of the four compressed second springs, the four circular sliders and four connecting rods move in opposite directions, causing the two arc-shaped scrapers to move closer to each other. This prevents the two arc-shaped scrapers from contacting the inner wall of the inner cylinder, reducing their wear rate and extending their service life. When it is necessary to collect the evaporated crystals, the two second motors are driven to rotate the two lead screws. Together with the two lead screw nuts and two connecting plates, the cylinder cover moves upward. The shaft then moves the circular plate upward along the inner wall of the inner cylinder, bringing the evaporated crystals to the top of the inner cylinder for easy collection.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. During use, the design of the snap-fit ​​mechanism allows for the individual replacement of the arc-shaped scraper without the need for a complete replacement, thus reducing maintenance costs and improving production efficiency.

[0012] 2. The air-inflating mechanism inflates the inside of the rotating shaft, pushing the four circular sliders to move along the inner walls of the four sleeves. With the help of the four connecting rods and two vertical plates, the two arc-shaped scrapers move away from each other, scraping and cleaning the inner wall of the inner cylinder. After cleaning, the reset mechanism moves the two arc-shaped scrapers closer together, gradually moving them away from the inner wall of the inner cylinder until they no longer contact each other, reducing their wear rate and extending the service life of the arc-shaped scrapers.

[0013] 3. The rotating mechanism drives the shaft to rotate, which in turn drives the four sleeves, four connecting rods, four vertical plates and four arc-shaped scrapers to rotate, which can enhance the convection inside the liquid, promote heat transfer, and thus accelerate the evaporation process of water. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a low-temperature drying treatment device for mixed salt wastewater proposed in this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the outer cylinder, water tank, and inner cylinder of a low-temperature drying treatment device for mixed salt wastewater proposed in this utility model.

[0016] Figure 3 This is a schematic diagram of the rotating mechanism and the air-filling mechanism of a low-temperature drying treatment device for mixed salt wastewater proposed in this utility model;

[0017] Figure 4 This is a schematic diagram of the rectangular base of a low-temperature drying device for mixed salt wastewater proposed in this utility model.

[0018] Figure 5 This is a schematic cross-sectional view of the rotating shaft and sleeve of a low-temperature drying treatment device for mixed salt wastewater proposed in this utility model.

[0019] Figure 6 This is a schematic diagram of the lifting mechanism of a low-temperature drying treatment device for mixed salt wastewater proposed in this utility model.

[0020] In the diagram: 1. Operating platform; 2. Outer cylinder; 3. Cylinder cover; 4. Water tank; 5. Connecting seat; 6. Second motor; 7. Semiconductor cooling chip; 8. Fin; 9. Water pump; 10. First connecting pipe; 11. Inner cylinder; 12. Rotating shaft; 13. First motor; 14. Circular plate; 15. First bevel gear; 16. Second bevel gear; 17. High-pressure blower; 18. Second connecting pipe; 19. Rotary joint; 20. Sleeve; 21. Vertical plate; 22. Arc scraper; 23. Rectangular seat; 24. Rectangular slider; 25. Rectangular column; 26. First spring; 27. Circular slider; 28. Connecting rod; 29. ​​Second spring; 30. First slide groove; 31. Lead screw; 32. Lead screw nut; 33. Connecting plate; 34. Third connecting pipe; 35. Rectangular hole; 36. Air pump; 37. Fourth connecting pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1 - Figure 6A low-temperature drying treatment device for mixed salt wastewater includes an operating platform 1. An outer cylinder 2 is fixed at the middle of the top of the operating platform 1. An inner cylinder 11 is fixed to the inner wall of the outer cylinder 2, and the outer cylinder 2 and the inner cylinder 11 form a cavity structure. A circular plate 14 is slidably connected to the inner wall of the inner cylinder 11. A rotating shaft 12 is rotatably connected to the middle of the top of the circular plate 14, and the rotating shaft 12 has a cavity structure. A cylinder cover 3 is provided on the top of the inner cylinder 11, and the cylinder cover 3 is sleeved on the outer wall of the rotating shaft 12. The top ends of the operating platform 1 are... Each sleeve is equipped with a lifting mechanism for raising the sleeve cover 3. The top of the sleeve cover 3 is equipped with a rotating mechanism for rotating the shaft 12. The top of the sleeve cover 3 is also equipped with an inflation mechanism for inflating the shaft 12. Four sleeves 20 are symmetrically fixed to the side wall of the shaft 12, with one end of each sleeve 20 connected to the shaft 12. Circular sliders 27 are slidably connected to the inner side wall of each of the four sleeves 20. A connecting rod 28 is fixed to one end of each of the four circular sliders 27, and one end of each connecting rod 28 passes through one of the four sleeves. At the other end of 20, the inner walls of the four sleeves 20 are all equipped with reset mechanisms for resetting the circular slider 27. One end of each pair of connecting rods 28 is fixed with the same vertical plate 21. The outer walls of the two vertical plates 21 are equipped with arc-shaped scrapers 22. The two arc-shaped scrapers 22 are equipped with snap-fit ​​mechanisms for snapping the arc-shaped scrapers 22 at both symmetrical ends of their side walls. A water tank 4 is fixed at the bottom of the operating table 1. A water supply mechanism for supplying water into the cavity is provided inside the water tank 4. A temperature control mechanism for controlling the temperature is provided inside the water tank 4. A suction mechanism for evacuating air from the inner cylinder 11 is provided at the bottom of the cylinder cover 3. During the use of this device, the arc-shaped scrapers 22 can be replaced individually without replacing the whole unit, reducing maintenance costs and improving production efficiency. The reset mechanism brings the two arc-shaped scrapers 22 closer to each other, causing the two arc-shaped scrapers 22 and the inner wall of the inner cylinder 11 to gradually move away from each other and no longer contact each other, reducing their wear rate and extending the service life of the arc-shaped scrapers 22.

[0023] In this invention, the snap-fit ​​mechanism includes a rectangular base 23, which is fixed to the side wall of one of the arc-shaped scrapers 22. A second sliding groove is provided at the top of the rectangular base 23, and the second sliding groove has a constricted opening. A rectangular slider 24 is slidably connected to the inner wall of the second sliding groove. A rectangular column 25 is fixed to the top of the rectangular slider 24. A first spring 26 is provided inside the second sliding groove and is located below the rectangular slider 24. A rectangular hole 35 is provided on the side wall of one of the vertical plates 21, and the rectangular hole 35 is adapted to the rectangular base 23. When the arc-shaped scraper 22 needs to be replaced, the four rectangular columns 25 are pressed, causing the four rectangular sliders 24 to move downwards along the inner walls of the four second sliding grooves until all four rectangular columns 25 are fully inserted into the four second sliding grooves. Then, the four rectangular bases 23 are pulled out from the four rectangular holes 35. This allows for individual replacement of the arc-shaped scraper 22 without requiring overall replacement, reducing replacement costs, avoiding prolonged equipment downtime, and thus improving production efficiency.

[0024] In this invention, the temperature control mechanism includes a semiconductor cooling chip 7. A through groove is provided at the bottom of the water tank 4, and the semiconductor cooling chip 7 is fixed to the inner wall of the through groove. Multiple fins 8 are fixed linearly at equal intervals at the cold end of the semiconductor cooling chip 7. The water delivery mechanism includes a water pump 9, which is fixed to the bottom of the water tank 4. A first connecting pipe 10 is fixed to the outlet of the water pump 9, and one end of the first connecting pipe 10 communicates with the cavity. Multiple third connecting pipes 34 are fixed in a circular pattern at equal intervals on the outer wall of the outer cylinder 2, and one end of each of the multiple third connecting pipes 34 is connected to the cavity. The other ends of the multiple third connecting pipes 34 are connected to the water tank 4. The semiconductor cooling chip 7 is set to a specified value. After the semiconductor cooling chip 7 is powered on, its hot end temperature rises rapidly to the specified value, heating the water to the specified temperature. The water pump 9, in conjunction with the first connecting pipe 10, pumps the warm water into the cavity, causing the internal temperature of the inner cylinder 11 to rise. This allows for low-temperature evaporation treatment of the mixed salt wastewater. When the cavity is full of warm water, the excess warm water enters the water tank 4 through the multiple third connecting pipes 34 for circulation heating and reuse.

[0025] In this utility model, the lifting mechanism includes a connecting seat 5, which is fixed to one end of the top of the operating table 1. A first sliding groove 30 is provided on the inner side wall of the connecting seat 5. A lead screw 31 is rotatably connected to the top of the first sliding groove 30. A lead screw nut 32 is slidably connected to the inner side wall of the first sliding groove 30. The lead screw nut 32 is sleeved on the side wall of the lead screw 31, and the lead screw nut 32 and the lead screw 31 are compatible. A connecting plate 33 is fixed to the side wall of the lead screw nut 32, and one end of the connecting plate 33 is fixed to the cylinder cover 3. A second motor 6 is fixed to the top of the connecting seat 5, and the output shaft of the second motor 6 is fixed to the lead screw 31. The rotating mechanism includes a first motor 13, which is fixed to the top of the cylinder cover 3. A first bevel gear 15 is sleeved on the output shaft of the first motor 13. A rotating shaft 12 is sleeved on the outer side wall. The second bevel gear 16 is adapted to the first bevel gear 15. The inflation mechanism includes a high-pressure blower 17, which is fixed to the top of the cylinder cover 3. A second connecting pipe 18 is fixed to the outlet of the high-pressure blower 17. A rotary joint 19 is installed at one end of the rotating shaft 12, and the rotary joint 19 is connected to one end of the second connecting pipe 18. The reset mechanism includes a second spring 29, which is sleeved on the side wall of one of the connecting rods 28 and located inside one of the sleeves 20. The suction mechanism includes a suction pump 36, which is fixed to the top of the cylinder cover 3. A fourth connecting pipe 37 is fixed to the inlet of the suction pump 36, and one end of the fourth connecting pipe 37 passes through the bottom of the cylinder cover 3. During the evaporation process, the suction pump is driven. 36, in conjunction with the fourth connecting pipe 37, extracts the evaporated water vapor from the inner cylinder 11, improving the efficiency of moisture removal. It also drives the first motor 13 to rotate the first bevel gear 15, which, in conjunction with the second bevel gear 16, drives the rotating shaft 12. The rotation of the rotating shaft 12 drives the four sleeves 20, four vertical plates 21, four connecting rods 28, and four arc-shaped scrapers 22 to rotate, thus stirring the mixed salt wastewater. This increases internal convection and heat transfer, facilitating faster moisture evaporation during low-temperature drying. When scraping and cleaning of the inner wall of the inner cylinder 11 is required, the high-pressure blower 17, in conjunction with the second connecting pipe 18, inflates the inside of the rotating shaft 12. At this time, air enters the four sleeves 20, coordinating with the four circular sliders... The four sleeves 27 move away from each other along the inside of the four sleeves 20, which in turn causes the four connecting rods 28 to move away from each other in pairs. Combined with the two vertical plates 21, this causes the two arc-shaped scrapers 22 to move away from each other, ensuring that both arc-shaped scrapers 22 contact the inner wall of the inner cylinder 11, scraping and cleaning the inner wall. At this time, the four second springs 29 are all in a compressed state. When scraping and cleaning of the inner wall of the inner cylinder 11 is no longer required, the rotating shaft 12 is no longer inflated. In this case, under the reaction force of the four compressed second springs 29, the four circular sliders 27 and the four connecting rods 28 move in opposite directions, causing the two arc-shaped scrapers 22 to move closer together, so that the two arc-shaped scrapers 22 no longer contact the inner wall of the inner cylinder 11, reducing its wear rate.To extend the service life of the arc-shaped scraper 22, when it is necessary to collect the evaporated crystals, two second motors 6 are simultaneously driven to rotate two lead screws 31. This, in conjunction with two lead screw nuts 32 and two connecting plates 33, moves the cylinder cover 3 upwards. Simultaneously, the rotating shaft 12 moves the circular plate 14 upwards along the inner wall of the inner cylinder 11, bringing the evaporated crystals to the top of the inner cylinder 11 for easy collection.

[0026] Working Principle: During operation, mixed salt wastewater is first injected into the inner cylinder 11, followed by a large amount of clean water into the water tank 4. A specified value is set for the semiconductor cooling chip 7, and its power switch is turned on. After the semiconductor cooling chip 7 is powered on, its hot end temperature rapidly rises to the specified value, heating the water to the specified temperature. The power switch for the water pump 9 is then turned on, driving the pump to pump warm water into the cavity through the first connecting pipe 10. This raises the internal temperature of the inner cylinder 11, allowing for low-temperature evaporation of the mixed salt wastewater. When the cavity is full of warm water, excess warm water enters the water tank 4 through multiple third connecting pipes 34 for circulating heating. During this process, the water in the mixed salt wastewater changes from a liquid phase to a gas phase. Simultaneously, the power switch of the suction pump 36 is turned on, driving the suction pump 36 in conjunction with the fourth connecting pipe 37 to extract the evaporated water vapor from the inner cylinder 11, improving the efficiency of water removal. During the evaporation process, the power switch of the first motor 13 is turned on, driving the first bevel gear 15 to rotate, which in turn drives the rotating shaft 12 to rotate in conjunction with the second bevel gear 16. The rotation of the rotating shaft 12 drives the four sleeves 20, four vertical plates 21, four connecting rods 28, and four arc-shaped scrapers 22 to rotate, stirring the mixed salt wastewater. This increases the convection inside the liquid, enhances heat transfer, and helps to evaporate water faster during the low-temperature drying process. When it is necessary to scrape and clean the inner wall of the inner cylinder 11, the power switch of the high-pressure blower 17 is turned on, driving... The high-pressure blower 17, in conjunction with the second connecting pipe 18, inflates the inside of the rotating shaft 12. At this time, air enters the four sleeves 20, and the four circular sliders 27 move away from each other along the inside of the four sleeves 20, thereby causing the four connecting rods 28 to move away from each other in pairs. This, combined with the two vertical plates 21, causes the two arc-shaped scrapers 22 to move away from each other, making both arc-shaped scrapers 22 contact the inner wall of the inner cylinder 11, scraping and cleaning the inner wall of the inner cylinder 11. At this time, the four second springs 29 are all in a compressed state. When it is no longer necessary to scrape and clean the inner wall of the inner cylinder 11, the power switch of the high-pressure blower 17 is turned off, and the inflation process inside the rotating shaft 12 is stopped. At this time, under the reaction force of the four compressed second springs 29, the shaft 12 is pushed... The four circular sliders 27 and four connecting rods 28 move in opposite directions, causing the two arc-shaped scrapers 22 to move closer together, thus preventing them from contacting the inner wall of the inner cylinder 11, reducing their wear rate, and extending their service life. When it is necessary to collect the evaporated crystals, the power switches of the two second motors 6 are turned on simultaneously, driving the two second motors 6 to rotate the two lead screws 31. This, along with the two lead screw nuts 32 and the two connecting plates 33, causes the cylinder cover 3 to move upward. This, in conjunction with the rotating shaft 12, causes the circular plate 14 to move upward along the inner wall of the inner cylinder 11, bringing the evaporated crystals to the top of the inner cylinder 11 for easy collection. When it is necessary to replace the arc-shaped scrapers 22, the four rectangular columns 25 are pressed.The four rectangular sliders 24 move downwards along the inner walls of the four second slide grooves until all four rectangular columns 25 are fully inserted into the four second slide grooves. Then, the four rectangular seats 23 are pulled out from the four rectangular holes 35. This allows for individual replacement of the arc-shaped scraper 22, eliminating the need for overall replacement, reducing replacement costs, avoiding prolonged equipment downtime, and thus improving production efficiency.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-temperature drying treatment device for mixed saline wastewater, comprising an operating table (1), characterized in that, An outer cylinder (2) is fixed at the top center of the operating table (1). An inner cylinder (11) is fixed to the inner wall of the outer cylinder (2), and there is a cavity structure between the outer cylinder (2) and the inner cylinder (11). A circular plate (14) is slidably connected to the inner wall of the inner cylinder (11). A rotating shaft (12) is rotatably connected at the top center of the circular plate (14), and the rotating shaft (12) is a cavity structure. A cylinder cover (3) is provided on the top of the inner cylinder (11), and the cylinder cover (3) 3) Sleeves are fitted onto the outer wall of the rotating shaft (12). The top of the operating platform (1) is equipped with lifting mechanisms for raising and lowering the cylinder cover (3). The top of the cylinder cover (3) is equipped with a rotating mechanism for rotating the rotating shaft (12). The top of the cylinder cover (3) is equipped with an inflation mechanism for inflating the inside of the rotating shaft (12). Four sleeves (20) are symmetrically fixed to the side wall of the rotating shaft (12), and one end of each of the four sleeves (20) is connected to the rotating shaft (12). Each of the four sleeves (20) has a circular slider (27) slidably connected to its inner wall. One end of each of the four circular sliders (27) is fixed with a connecting rod (28), and one end of each connecting rod (28) passes through the other end of the four sleeves (20). Each of the four sleeves (20) has a reset mechanism for resetting the circular sliders (27). One end of every two connecting rods (28) is fixed with the same vertical plate (21). The two vertical plates (21)... The outer sidewalls are provided with arc-shaped scrapers (22), and the two arc-shaped scrapers (22) are provided with snap-fit ​​mechanisms at both ends of their symmetrical sidewalls. The bottom of the operating table (1) is fixed with a water tank (4). The water tank (4) is provided with a water delivery mechanism for delivering water into the cavity. The water tank (4) is provided with a temperature control mechanism for controlling the temperature. The bottom of the cylinder cover (3) is provided with an air extraction mechanism for extracting air from the inside of the inner cylinder (11).

2. The low-temperature drying treatment device for mixed salt wastewater according to claim 1, characterized in that, The snap-fit ​​mechanism includes a rectangular base (23), which is fixed to the side wall of one of the arc-shaped scrapers (22). The top of the rectangular base (23) is provided with a second sliding groove, which is a constricted structure. A rectangular slider (24) is slidably connected to the inner side wall of the second sliding groove. A rectangular column (25) is fixed to the top of the rectangular slider (24). A first spring (26) is provided inside the second sliding groove and is located below the rectangular slider (24). A rectangular hole (35) is provided on the side wall of one of the vertical plates (21), and the rectangular hole (35) is adapted to the rectangular base (23).

3. The low-temperature drying treatment device for mixed saline wastewater according to claim 1, characterized in that, The temperature control mechanism includes a semiconductor cooling chip (7), and a through groove is provided at the bottom of the water tank (4). The semiconductor cooling chip (7) is fixed on the inner side wall of the through groove, and multiple fins (8) are fixed at equal distances in a linear shape at the cold end of the semiconductor cooling chip (7).

4. The low-temperature drying treatment device for mixed saline wastewater according to claim 1, characterized in that, The water delivery mechanism includes a water pump (9), which is fixed at the bottom of the water tank (4). The outlet of the water pump (9) is fixed with a first connecting pipe (10), and one end of the first connecting pipe (10) is connected to the cavity.

5. The low-temperature drying treatment device for mixed salt wastewater according to claim 1, characterized in that, The outer cylindrical shell (2) has multiple third connecting pipes (34) fixed in a circular pattern at equal intervals on its outer side wall. One end of each of the multiple third connecting pipes (34) is connected to the cavity, and the other end of each of the multiple third connecting pipes (34) is connected to the water tank (4).

6. The low-temperature drying treatment device for mixed saline wastewater according to claim 1, characterized in that, The lifting mechanism includes a connecting seat (5), which is fixed to one end of the top of the operating table (1). The inner side wall of the connecting seat (5) is provided with a first sliding groove (30). The top of the first sliding groove (30) is rotatably connected to a lead screw (31). The inner side wall of the first sliding groove (30) is slidably connected to a lead screw nut (32). The lead screw nut (32) is sleeved on the side wall of the lead screw (31), and the lead screw nut (32) and the lead screw (31) are compatible. The side wall of the lead screw nut (32) is fixed with a connecting plate (33), and one end of the connecting plate (33) is fixed to the cylinder cover (3). The top of the connecting seat (5) is fixed with a second motor (6), and the output shaft of the second motor (6) is fixed to the lead screw (31).

7. The low-temperature drying treatment device for mixed salt wastewater according to claim 1, characterized in that, The rotating mechanism includes a first motor (13), which is fixed to the top of the cylinder cover (3). The output shaft of the first motor (13) is sleeved with a first bevel gear (15), and the outer wall of the rotating shaft (12) is sleeved with a second bevel gear (16), and the second bevel gear (16) and the first bevel gear (15) are adapted to each other.

8. The low-temperature drying treatment device for mixed saline wastewater according to claim 1, characterized in that, The inflation mechanism includes a high-pressure blower (17), the top of the cylinder cover (3) is fixed with the high-pressure blower (17), the outlet of the high-pressure blower (17) is fixed with a second connecting pipe (18), one end of the rotating shaft (12) is equipped with a rotary joint (19), and the rotary joint (19) is connected to one end of the second connecting pipe (18).

9. The low-temperature drying treatment device for mixed saline wastewater according to claim 1, characterized in that, The reset mechanism includes a second spring (29), which is sleeved on the side wall of one of the connecting rods (28) and located inside one of the sleeves (20).

10. The low-temperature drying treatment device for mixed saline wastewater according to claim 1, characterized in that, The air extraction mechanism includes an air pump (36), which is fixed to the cylinder. The top of the cover (3) has a fourth connecting pipe (37) fixed to the air inlet of the air pump (36). Furthermore, one end of the fourth connecting pipe (37) extends through the bottom of the cylinder cover (3).

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