Device and method for low-temperature crystallization, melting and desalting of high-salinity wastewater

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a high-salinity wastewater low-temperature crystallization melting desalting device and method.The high-salinity wastewater low-temperature crystallization melting desalting device comprises a crystallization melting desalting device, a ton barrel and an infusion pump arranged on the crystallization melting desalting device, the infusion pump is slidably connected to the side wall of the crystallization melting desalting device, and a bottom frame is arranged beside the crystallization melting desalting device; the bottom frame is slidably connected with a containing frame used for containing a ton barrel, the containing frame is provided with two containing grooves matched with the ton barrel, the liquid inlet end of the infusion pump is fixedly connected with a fixing pipe, the side wall of the fixing pipe is fixedly connected with a side pipe, the side wall of the fixing pipe is provided with a conical sealing ring, and the upper side and the lower side of the outer wall of the side pipe are each provided with a top groove. Through the arrangement of the fixing pipe, the side pipe, the driving mechanism and other structures, rapid connection between the ton barrel and the crystallization melting desalter can be automatically achieved, meanwhile, an exhaust groove of the ton barrel can be automatically opened, connection between the ton barrel and the crystallization melting desalter can be rapidly released after extraction is completed, manual disassembly and assembly by workers are not needed, and the convenient performance of the device is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, in particular to a device and method for low-temperature crystallization and melting desalination of high-salt wastewater. Background Art

[0002] The high-salt wastewater low-temperature crystallization desalination device is a device used to treat high-salt wastewater and achieve salt crystallization and recovery. In some small-scale or intermittent production, high-salt wastewater is usually stored in ton barrels, and then these ton barrels are transported to the equipment for treatment. However, this traditional treatment method has some significant defects.

[0003] First of all, although ton barrels are more flexible in storage and transportation, they need to be manually disassembled and assembled when replacing them, and the ton barrels need to be docked or separated from the connecting pipes of the equipment. This process is not only cumbersome, but also requires operators to be equipped with corresponding protective equipment, such as gloves, goggles, chemical protective clothing, etc., to prevent high-salt wastewater from causing damage to the skin, eyes, etc. This undoubtedly increases the complexity and labor intensity of the operation, and also prolongs the downtime of the equipment and reduces production efficiency.

[0004] In addition, during the manual disassembly and assembly process, wastewater leakage is likely to occur due to problems with the sealing of the drum cover and the adaptability of the connecting pipes, which will not only cause material loss, but also pose a threat to the operating environment and the safety of operators.

[0005] In small or intermittent production scenarios, wastewater treatment needs are relatively small and discontinuous, so the equipment needs to be able to respond quickly and adapt to different processing volumes. However, the traditional ton barrel replacement method is difficult to meet this flexibility requirement. It often takes a lot of time to prepare and replace the ton barrels, and it is impossible to achieve an efficient and continuous wastewater treatment process.

[0006] Therefore, a high-salt wastewater low-temperature crystallization and melting desalination device and method are proposed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a high-salt wastewater low-temperature crystallization and melting desalination device and method.

[0008] In order to achieve the above purpose, the technical solution adopted by the present invention is: a high-salt wastewater low-temperature crystallization and desalination device, including a crystallization and desalination device and a ton barrel, and a liquid pump arranged on the crystallization and desalination device, the liquid pump is slidably connected to the side wall of the crystallization and desalination device, a bottom frame is provided next to the crystallization and desalination device, a placement rack for placing ton barrels is slidably connected to the bottom frame, the placement rack is provided with two placement slots adapted for the ton barrels, the liquid inlet end of the liquid pump is fixedly connected to a fixed pipe, and the side wall of the fixed pipe is fixedly connected to a side pipe The side wall of the fixed tube is provided with a conical sealing ring, and top grooves are provided on the upper and lower sides of the outer wall of the side tube. Upper rods are slidably connected in the top grooves, and the upper rods are fixedly connected to the outer wall of the conical sealing ring. The upper and lower sides of the outer wall of the side tube are fixedly connected with sliding frames, and the inner sides of the sliding frames are slidably connected with positioning blocks. The outer wall of the drainage pipe of the ton barrel is fixedly connected with a positioning ring, and an exhaust mechanism for automatically opening the exhaust of the ton barrel is also provided. The side tube is provided with a driving mechanism for first locking the conical sealing ring and then unlocking the positioning block limit.

[0009] In the above technical solution, further, a bellows is fixedly connected between the fixed tube and the conical sealing ring, and the positioning blocks are arranged on the inner side of the side tube on the side close to the positioning block, the side walls of the sliding frame are provided with bottom grooves, the side walls of the positioning blocks are fixedly connected with a lower rod relative to the position in the bottom groove, the positioning blocks are inclined away from the fixed tube, an upper spring is fixedly connected between the inner wall of the sliding frame and the side away from the positioning block, and a lower spring is fixedly connected between the inner side of the top groove and the outer wall of the upper rod.

[0010] In the above technical solution, further, three upper electric telescopic cylinders are fixedly connected to the inner side of the bottom frame, the bottom end of the placement rack is fixedly connected to the lower plate relative to the inner side of the bottom frame, and the output ends of the three upper electric telescopic cylinders are fixedly connected to the side wall of the lower plate.

[0011] In the above technical solution, further, the driving mechanism includes a lower electric telescopic cylinder, the outer wall of the side tube is fixedly connected to a U-shaped frame, the inner side of the U-shaped frame is slidably connected to a U-shaped plate, both ends of the U-shaped plate are respectively fixedly connected to a main plate and a secondary plate, the lower electric telescopic cylinder is fixedly connected to the side wall of the U-shaped frame, the output end of the lower electric telescopic cylinder passes through the inner side of the U-shaped frame and is fixedly connected to the side wall of the U-shaped plate, the side wall of the main plate is tilted, the secondary plates are tilted away from each other, the main plate is arranged next to the upper rod, and the secondary plate is arranged next to the sliding frame.

[0012] In the above technical solution, further, a rear plate is fixedly connected to the rear side of the crystallizer melt desalter, a pair of hydraulic telescopic cylinders are fixedly connected to the side wall of the rear plate, the output end of the hydraulic telescopic cylinder passes through the side wall of the rear plate and is fixedly connected to the side wall of the liquid pump, and a hose is fixedly connected between the liquid outlet end of the liquid pump and the liquid inlet end of the crystallizer melt desalter.

[0013] In the above technical solution, further, the exhaust mechanism includes an exhaust electric telescopic cylinder, the outer wall of the side tube is fixedly connected to an L-shaped bracket, the liquid inlet end of the ton barrel is threadedly connected to a sealing cover, an exhaust groove is opened through the sealing cover, a sliding cavity is opened on the inner side of the exhaust groove, an L-shaped sealing plate is slidably connected to the inner side of the sliding cavity, the exhaust electric telescopic cylinder is fixedly connected to the top of the L-shaped bracket, a side groove is opened on the side wall of the L-shaped bracket, an exhaust plate is slidably connected to the inner side of the side groove, the exhaust electric telescopic cylinder is fixedly connected to the side wall of the exhaust plate, and an annular groove is opened on the inner side of the side tube.

[0014] In the above technical solution, further, three limit springs are fixedly connected to the inner side of the sliding cavity, and the other ends of the three limit springs are fixedly connected to the side wall of the L-shaped blocking plate.

[0015] In the above technical solution, further, the bottom end of the outer wall of the side tube is fixedly connected to a drain pipe, and the drain pipe is communicated with the inner side of the annular groove, the side wall of the L-shaped bracket is fixedly connected to a water pump, the other end of the drain pipe is fixedly connected to the liquid inlet end of the water pump, the liquid outlet end of the water pump is fixedly connected to a connecting pipe, the other end of the connecting pipe is fixedly connected to the side wall of the exhaust plate, and the drain pipe and the outer wall of the connecting pipe are both fixedly connected to the outer wall of the L-shaped bracket.

[0016] The method for low-temperature crystallization and melting desalination of high-salt wastewater comprises the following steps: Step 1: Load the barrel. First, use a forklift to place the barrel on the rack, and insert the drain pipe on the barrel into the side pipe. Step 2: Automatic docking: Control the driving mechanism to squeeze the conical sealing ring tightly into the ton barrel drain pipe to achieve automatic docking between the two. At the same time, open the exhaust of the ton barrel through the exhaust mechanism, then open the valve of the drain pipe on the ton barrel, and control the liquid pump to start extracting the high-salt wastewater in the ton barrel; Step three, prepare the wastewater material. During the process of extracting the high-salt wastewater in the ton barrel, another ton barrel can be fork-transported to the placement rack. After the high-salt wastewater in the previous ton barrel is extracted, the side pipe is transferred to another ton barrel for automatic docking.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can automatically realize the quick connection between the ton barrel and the crystallizer melt desalter through the arrangement of structures such as fixed pipes, side pipes and driving mechanisms. At the same time, it can automatically open the exhaust slot of the ton barrel and quickly release the connection between the two after the extraction is completed, thereby eliminating the need for workers to manually disassemble and assemble, greatly improving the convenience of the device.

[0018] 2. The present invention arranges structures such as a placement rack, a hydraulic telescopic cylinder and an upper electric telescopic cylinder, so that during the extraction of high-salt wastewater, another ton barrel can be placed on the other side of the placement rack, so that after the previous ton barrel is extracted, the crystallization melt desalter can be quickly docked with the other ton barrel, saving time for material replacement and improving the treatment efficiency of high-salt wastewater.

[0019] 3. The present invention, through the arrangement of exhaust mechanism and water pump and other structures, can catch the outflowing high-salt wastewater when the conical sealing ring is pulled out from the ton barrel drain pipe, and can extract the high-salt wastewater and discharge it into the current ton barrel, thereby preventing it from dripping around the equipment and affecting the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front three-dimensional structure of the melting and desalination equipment of the present invention; Figure 2 It is a rear perspective structural diagram of the melting and desalination equipment of the present invention; Figure 3 This is a schematic diagram of the rear perspective structure of the ton barrel, fixed pipe and L-shaped bracket of the present invention; Figure 4 The appended Figure 3 A schematic diagram of the partially enlarged structure at center A; Figure 5 The appended Figure 3 A schematic diagram of the partially enlarged structure at point B in the middle; Figure 6 This is a bottom-view three-dimensional structural diagram of the base frame and the placement rack of the present invention; Figure 7 This is a schematic diagram of the fixed pipe and side pipe of the present invention and the three-dimensional structure of the drainage pipe; Figure 8 This is a schematic diagram of the front full-section three-dimensional structure of the sealing cover of the present invention; Figure 9 It is a schematic diagram of the overall appearance structure of the fixed tube, side tube and lower electric telescopic cylinder of the present invention.

[0021] In the figure: 1. Crystallizer; 2. Liquid pump; 3. Bottom frame; 4. Ton barrel; 5. Placement rack; 6. Upper electric telescopic cylinder; 7. Lower plate; 8. Fixed pipe; 9. Side pipe; 10. Bellows; 11. Conical sealing ring; 12. Top groove; 13. Upper rod; 14. Sliding frame; 15. Positioning block; 16. Positioning ring; 17. Lower rod; 18. Upper spring; 19. Lower spring; 20. Lower electric telescopic cylinder; 21. U-shaped frame; 22. U-shaped plate; 23. Main plate; 24. Secondary plate; 25. Rear plate; 26. Hydraulic telescopic cylinder; 27. Exhaust electric telescopic cylinder; 28. L-shaped bracket; 29. ​​Sealing cover; 30. L-shaped blocking plate; 31. Exhaust plate; 32. Annular groove; 33. Drain pipe; 34. Limit spring; 35. Water pump; 36. Exhaust groove; 37. Hose; 38. Connecting pipe. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] In actual use, it was found that when replacing the ton barrel 4, manual disassembly and assembly is required to connect or separate the ton barrel 4 and the connecting pipe of the equipment. This process is not only cumbersome, but also requires the operator to be equipped with corresponding protective equipment, such as gloves, goggles, chemical protective clothing, etc., to prevent high-salt wastewater from causing damage to the skin, eyes, etc. This undoubtedly increases the complexity and labor intensity of the operation, and also prolongs the downtime of the equipment and reduces production efficiency. In order to solve the above problems, the following structure is specially invented.

[0025] like Figures 1-9The high-salt wastewater low-temperature crystallization and desalination device shown includes a crystallization and desalination device 1 and a ton barrel 4, as well as a liquid pump 2 arranged on the crystallization and desalination device 1. The crystallization and desalination device 1 mainly uses the liquid pump 2 to pump the high-salt wastewater in the ton barrel 4. Under low-temperature conditions, the salt crystallizes and precipitates due to reduced solubility. After the crystallized salt is removed by centrifugal separation, the mother liquor can be returned to the evaporation system for further processing. Finally, the crystallized salt is recycled after drying and packaging, thereby realizing wastewater reduction and salt resource utilization. The liquid pump 2 is slidably connected to the side wall of the crystallization and desalination device 1. A bottom frame 3 is provided next to the crystallization and desalination device 1. A placement rack 5 for placing the ton barrel 4 is slidably connected to the bottom frame 3. The placement rack 5 is provided with two ton barrels. 4 are adapted for placement grooves, the liquid inlet end of the liquid pump 2 is fixedly connected with a fixed pipe 8, the side wall of the fixed pipe 8 is fixedly connected with a side pipe 9, the side wall of the fixed pipe 8 is provided with a conical sealing ring 11, and top grooves 12 are provided on the upper and lower sides of the outer wall of the side pipe 9, and an upper rod 13 is slidably connected in the top groove 12. The upper rod 13 is fixedly connected to the outer wall of the conical sealing ring 11, and the upper and lower sides of the outer wall of the side pipe 9 are fixedly connected with a sliding frame 14, and the inner side of the sliding frame 14 is slidably connected with a positioning block 15. The outer wall of the drain pipe of the ton barrel 4 is fixedly connected with a positioning ring 16, and an exhaust mechanism for automatically opening the ton barrel 4 to exhaust is also provided. The side pipe 9 is provided with a driving mechanism for first locking the conical sealing ring 11 and then unlocking the positioning block 15 limit; A bellows 10 is fixedly connected between the fixed tube 8 and the conical sealing ring 11, and the bellows 10 is used to avoid obstructing the normal telescopic docking of the conical sealing ring 11, and the positioning blocks 15 are arranged on the inner side of the side tube 9 on the side close to the sliding frame 14. The side walls of the sliding frame 14 are provided with bottom grooves, and the side walls of the positioning blocks 15 are fixedly connected with lower rods 17 relative to the positions in the bottom grooves. The positioning blocks 15 are tilted away from the fixed tube 8. An upper spring 18 is fixedly connected between the inner wall of the sliding frame 14 and the side away from the positioning block 15, and a lower spring 19 is fixedly connected between the inner side of the top groove 12 and the outer wall of the upper rod 13. The driving mechanism includes a lower electric telescopic cylinder 20, a U-shaped frame 21 is fixedly connected to the outer wall of the side tube 9, a U-shaped plate 22 is slidably connected to the inner side of the U-shaped frame 21, and both ends of the U-shaped plate 22 are respectively fixedly connected to the main plate 23 and the secondary plate 24. The lower electric telescopic cylinder 20 is fixedly connected to the side wall of the U-shaped frame 21, and the output end of the lower electric telescopic cylinder 20 passes through the inner side of the U-shaped frame 21 and is fixedly connected to the side wall of the U-shaped plate 22. The side wall of the main plate 23 is tilted, and the secondary plates 24 are tilted away from each other. The main plate 23 is set next to the upper rod 13, and the secondary plate 24 is set next to the sliding frame 14. When treating high-salt wastewater, the ton barrel 4 storing high-salt wastewater is first placed on the placement rack 5 by a forklift (it should be noted here that the groove on the placement rack 5 is adapted to the ton barrel 4 and can play a positioning role for the ton barrel 4 to ensure the accurate docking of the subsequent drainage pipe and the side pipe 9). At the same time, in the process of placing the ton barrel 4, the drainage pipe of the ton barrel 4 needs to be inserted into the side pipe 9 (this operation can be improved later). In the process of inserting the drainage pipe of the ton barrel 4, the side wall of the positioning ring 16 on the drainage pipe of the ton barrel 4 will squeeze the inclined surface of the positioning block 15, so that the positioning block 15 slides into the sliding frame 14 and compresses the upper spring 18. Then, when the positioning block 15 is removed from the positioning ring 16, the squeezing of the positioning block 15 will be released, and then the positioning block 15 will be pushed to the side wall of the positioning ring 16 under the elastic force of the upper spring 18 (through the setting of the positioning block 15, the displacement of the ton barrel 4 can be prevented from affecting the sealing of the connection between the two). At this time, the ton barrel 4 is completely placed in the placement rack 5; Then the lower electric telescopic cylinder 20 can be controlled to start driving the U-shaped plate 22, the main plate 23 and the secondary plate 24 to move, and then the main plate 23 moves to the side of the upper rod 13, and then the upper rod 13 is squeezed through the inclined surface of the side wall of the main plate 23, so that the upper rod 13 slides in the top groove 12, while compressing the lower spring 19, and driving the conical sealing ring 11 and the bellows 10 to move (it should be noted here that the upper rod 13 slides horizontally in the top groove 12, playing a guiding role, thereby ensuring the alignment of the conical sealing ring 11 with the drain pipe of the ton barrel 4), and then the upper rod 13 is squeezed to the side wall of the main plate 23, and the conical sealing ring 11 is squeezed tightly into the drain pipe of the ton barrel 4, thereby realizing an automatic sealing connection between the two, and then the valve on the drain pipe of the ton barrel 4 can be opened, and then the liquid pump 2 can be controlled to start extracting the high-salt wastewater in the ton barrel 4 into the crystallization melt desalter 1 for low-temperature desalination treatment.

[0026] In summary, through the design of the above structure, the quick connection between the ton barrel 4 and the crystallization melt desalter 1 can be automatically achieved, and the connection between the two can be quickly released after the extraction is completed, thereby eliminating the need for workers to manually disassemble and assemble, greatly improving the convenience of the device.

[0027] On the basis of the above embodiment, it was found during use that if only one ton barrel 4 can be quickly docked, the ton barrel 4 needs to be removed and pumped out, and a new ton barrel 4 needs to be placed before docking can be achieved, which takes a long time and wastes the treatment efficiency of high-salt wastewater. In order to solve the above problem, the above structure has been further improved.

[0028] Three upper electric telescopic cylinders 6 are fixedly connected to the inner side of the bottom frame 3, and the bottom end of the placement frame 5 is fixedly connected to the lower plate 7 relative to the inner side of the bottom frame 3. The output ends of the three upper electric telescopic cylinders 6 are fixedly connected to the side wall of the lower plate 7; A rear plate 25 is fixedly connected to the rear side of the crystallizer melt desalter 1. A pair of hydraulic telescopic cylinders 26 are fixedly connected to the side walls of the rear plate 25. The output ends of the hydraulic telescopic cylinders 26 pass through the side walls of the rear plate 25 and are fixedly connected to the side walls of the liquid pump 2. A hose 37 is fixedly connected between the liquid outlet of the liquid pump 2 and the liquid inlet of the crystallizer melt desalter 1. During the process of extracting the high-salt wastewater in the previous ton barrel 4, another ton barrel 4 can be placed on the other side of the placement rack 5 by a forklift, so that after the previous ton barrel 4 is extracted, the lower electric telescopic cylinder 20 can be controlled to continue to start, driving the U-shaped plate 22 to continue to move. At this time, the upper rod 13 slides on the side wall of the main plate 23, and then the secondary plate 24 moves to the bottom of the lower rod 17, and then gradually squeezes the lower rod 17 to move away from the side through the inclined surface of the secondary plate 24, and drives the positioning block 15 to slide in the slide frame 14, while compressing the upper spring 18, and then pushing the positioning block 15 away from the positioning ring 16, releasing the position restriction of the side pipe 9, and then the upper electric telescopic cylinder 6 can be controlled to start to drive the lower plate 7 and the placement rack 5 to move away from the crystallization melt desalter 1, and then the drainage pipe on the ton barrel 4 is pulled out from the side pipe 9; Then control the hydraulic telescopic cylinder 26 to start and drive the liquid pump 2 to move, and drive the fixed pipe 8, side pipe 9 and conical sealing ring 11 to move, so that the side pipe 9 moves to the side of another ton barrel 4, and then control the upper electric telescopic cylinder 6 to start and reset, and insert the drain pipe on the corresponding ton barrel 4 into the side pipe 9, and then control the lower electric telescopic cylinder 20 to start and repeat the above operation to achieve the connection between the two. Finally, the forklift forks away the empty ton barrel 4 and puts in a new ton barrel 4.

[0029] To sum up, through the design of the above structure, during the extraction of high-salt wastewater, another ton barrel 4 can be placed on the other side of the placement rack 5, so that after the previous ton barrel 4 is extracted, the crystallization melt desalter 1 can be quickly docked with the other ton barrel 4, saving the time for changing materials and improving the treatment efficiency of high-salt wastewater.

[0030] On the basis of the above embodiment, it was found during use that after the ton barrel 4 was docked with the crystallization melt desalter 1, the workers still had to open the lid of the ton barrel 4 to ensure that the high-salt waste liquid in the ton barrel 4 could be quickly extracted, which was quite troublesome. In order to solve the above problem, the above structure was further improved.

[0031] The exhaust mechanism includes an exhaust electric telescopic cylinder 27, an L-shaped bracket 28 is fixedly connected to the outer wall of the side pipe 9, and a sealing cover 29 is threadedly connected to the liquid inlet end of the ton barrel 4. An exhaust groove 36 is formed on the sealing cover 29, and a sliding cavity is formed inside the exhaust groove 36. An L-shaped blocking plate 30 is slidably connected to the inside of the sliding cavity (it should be noted here that the threaded setting on the ton barrel 4 can ensure that after the sealing cover 29 is tightened, the L-shaped blocking plate 30 is located on one side of the L-shaped bracket 28, thereby ensuring the normal opening of the subsequent exhaust groove 36. During the placement process, the forklift worker should also pay attention to this point. The L-shaped blocking plate 30 needs to be placed toward the side of the crystallizer melt desalter 1 to ensure the normal operation of subsequent work). The exhaust electric telescopic cylinder 27 is fixedly connected to the top of the L-shaped bracket 28, and a side groove is formed on the side wall of the L-shaped bracket 28. An exhaust plate 31 is slidably connected to the inside of the side groove. The exhaust electric telescopic cylinder 27 is fixedly connected to the side wall of the exhaust plate 31, and an annular groove 32 is formed inside the side pipe 9; Three limit springs 34 are fixedly connected to the inner side of the sliding cavity, and the other ends of the three limit springs 34 are fixedly connected to the side wall of the L-shaped blocking plate 30; When the lower electric telescopic cylinder 20 is controlled to start and connect the two, the exhaust electric telescopic cylinder 27 can be controlled to start and drive the exhaust plate 31 to move, and then the L-shaped sealing plate 30 is pushed to slide in the sliding cavity through the exhaust plate 31, and at the same time, the limit spring 34 is compressed, and then the exhaust groove 36 is gradually opened, realizing the automatic opening of the exhaust groove 36, ensuring the normal entry of external air when the liquid pump 2 is running, avoiding the negative pressure state in the ton barrel 4, affecting the normal discharge of high-salt wastewater.

[0032] In summary, through the design of the above structure, the exhaust slot 36 of the ton barrel 4 can be automatically opened, and workers do not need to frequently unscrew the lid of the ton barrel 4, further improving the convenience of the device.

[0033] On the basis of the above embodiments, it was found during use that when the conical sealing ring 11 was pulled out from the drain pipe on the ton barrel 4, the conical sealing ring 11 would block the discharge of a portion of the high-salt wastewater at the bottom end of the drain pipe. Therefore, some wastewater would remain in the drain pipe (it should be noted here that there would be a small amount of residual wastewater in the ton barrel 4, which is negligible compared with the total volume of the ton barrel 4. When the ton barrel 4 is subsequently recycled, the retained wastewater can be brought into a new treatment process and will not interfere with the treatment of the newly added wastewater. Therefore, this will not affect the treatment effect, and it fully meets environmental protection requirements, and the recycling of the ton barrel 4 can be smoothly implemented). After the conical sealing ring 11 is pulled out, the wastewater will flow to the ground. However, the leakage of high-salt wastewater will pose a threat to the operating environment and the safety of the operators. Therefore, in order to solve the above problems, the above structure has been further improved.

[0034] A drain pipe 33 is fixedly connected to the bottom end of the outer wall of the side tube 9, and the drain pipe 33 is communicated with the inner side of the annular groove 32. A water pump 35 is fixedly connected to the side wall of the L-shaped bracket 28. The other end of the drain pipe 33 is fixedly connected to the liquid inlet end of the water pump 35. The liquid outlet end of the water pump 35 is fixedly connected to a connecting pipe 38. The other end of the connecting pipe 38 is fixedly connected to the side wall of the exhaust plate 31. The outer walls of the drain pipe 33 and the connecting pipe 38 are both fixedly connected to the outer wall of the L-shaped bracket 28, but a portion of the connecting pipe 38 close to the exhaust plate 31 cannot be fixed to the inner side of the L-shaped bracket 28 to ensure that when the exhaust plate 31 moves, the connecting pipe 38 can be pulled to move. When the drain pipe of the ton barrel 4 is pulled out from the conical sealing ring 11, the residual high-salt wastewater in the drain pipe of the ton barrel 4 will drip into the annular groove 32. At this time, the water pump 35 can be controlled to start, and the high-salt wastewater collected in the annular groove 32 can be pumped out through the drain pipe 33, and then transferred to the connecting pipe 38, and discharged into the exhaust groove 36 from the other end of the connecting pipe 38 into the ton barrel 4 (during the separation process, it should be noted that it is necessary to control the exhaust electric telescopic cylinder 27 to continue to start together, so that the exhaust plate 31 moves with the ton barrel 4, and at the same time drive the connecting pipe 38 to move, to ensure that the discharged high-salt wastewater can be discharged into the ton barrel 4), and during this operation, it is necessary to stay for a period of time before controlling the upper electric telescopic cylinder 6 to start and completely push the drain pipe of the ton barrel 4 out of the side pipe 9.

[0035] To sum up, through the design of the above structure, when the conical sealing ring 11 is pulled out from the drain pipe of the ton barrel 4, the high-salt wastewater flowing out can be caught through the annular groove 32, and the high-salt wastewater can be extracted and discharged into the current ton barrel 4, which can avoid dripping around the equipment and affecting the equipment.

[0036] The method for low-temperature crystallization and melting desalination of high-salt wastewater comprises the following steps: Step 1: Load the barrel. First, use a forklift to place the barrel 4 on the placement rack 5, and insert the drain pipe on the barrel 4 into the side pipe 9; Step 2: Automatic docking: Control the driving mechanism to squeeze the conical sealing ring 11 tightly into the drain pipe of the ton barrel 4 to achieve automatic docking between the two. At the same time, open the exhaust of the ton barrel 4 through the exhaust mechanism, then open the valve of the drain pipe on the ton barrel 4, and control the liquid pump 2 to start extracting the high-salt wastewater in the ton barrel 4; Step three, prepare the wastewater material. During the process of extracting the high-salt wastewater in the ton barrel 4, another ton barrel 4 can be forked onto the placement rack 5. Then, after the high-salt wastewater in the previous ton barrel 4 is extracted, the side pipe 9 is transferred to another ton barrel 4 for automatic docking.

[0037] The basic principles, main features and advantages of the present invention are shown and described above.

[0038] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A low-temperature crystallization and melting desalination device for high-salt wastewater, comprising a crystallization and melting desalter (1) and a ton barrel (4), and a liquid pump (2) arranged on the crystallization and melting desalter (1), characterized in that: The liquid pump (2) is slidably connected to the side wall of the crystallizer (1), and a bottom frame (3) is provided next to the crystallizer (1). A placement rack (5) for placing a ton barrel (4) is slidably connected to the bottom frame (3). The placement rack (5) is provided with two placement slots adapted to the ton barrel (4). The liquid inlet end of the liquid pump (2) is fixedly connected to a fixed pipe (8), and the side wall of the fixed pipe (8) is fixedly connected to a side pipe (9). The side wall of the fixed pipe (8) is provided with a conical sealing ring (11), and the upper and lower sides of the outer wall of the side pipe (9) are provided with top grooves (12). The top groove (12) is slidably connected to an upper rod (13), and the upper rod (13) is fixedly connected to the outer wall of the conical sealing ring (11). The upper and lower sides of the outer wall of the side tube (9) are fixedly connected to a sliding frame (14), and the inner side of the sliding frame (14) is slidably connected to a positioning block (15). The outer wall of the drainage pipe of the ton barrel (4) is fixedly connected to a positioning ring (16), and an exhaust mechanism for automatically opening the ton barrel (4) for exhaust is also provided. The side tube (9) is provided with a driving mechanism for first locking the conical sealing ring (11) and then unlocking the positioning block (15) to limit the position.

2. The high-salt wastewater low-temperature crystallization and melting desalination device according to claim 1 is characterized in that: A bellows (10) is fixedly connected between the fixed tube (8) and the conical sealing ring (11), and the positioning block (15) is arranged on the inner side of the side tube (9) on the side close to the positioning block (15). The side walls of the sliding frame (14) are provided with bottom grooves. The side walls of the positioning block (15) are fixedly connected with a lower rod (17) relative to the position in the bottom groove. The positioning block (15) is tilted away from the fixed tube (8). An upper spring (18) is fixedly connected between the inner wall of the sliding frame (14) and the side away from the positioning block (15). A lower spring (19) is fixedly connected between the inner side of the top groove (12) and the outer wall of the upper rod (13).

3. The high-salt wastewater low-temperature crystallization and melting desalination device according to claim 1 is characterized in that: Three upper electric telescopic cylinders (6) are fixedly connected to the inner side of the bottom frame (3); the bottom end of the placement rack (5) is fixedly connected to a lower plate (7) relative to the inner side of the bottom frame (3); and the output ends of the three upper electric telescopic cylinders (6) are fixedly connected to the side wall of the lower plate (7).

4. The high-salt wastewater low-temperature crystallization and melting desalination device according to claim 1 is characterized in that: The driving mechanism comprises a lower electric telescopic cylinder (20), the outer wall of the side tube (9) is fixedly connected to a U-shaped frame (21), the inner side of the U-shaped frame (21) is slidably connected to a U-shaped plate (22), both ends of the U-shaped plate (22) are respectively fixedly connected to a main plate (23) and a secondary plate (24), the lower electric telescopic cylinder (20) is fixedly connected to the side wall of the U-shaped frame (21), the output end of the lower electric telescopic cylinder (20) passes through the inner side of the U-shaped frame (21) and is fixedly connected to the side wall of the U-shaped plate (22), the side wall of the main plate (23) is tilted, and the secondary plates (24) are tilted away from each other, the main plate (23) is arranged next to the upper rod (13), and the secondary plate (24) is arranged next to the sliding frame (14).

5. The high-salt wastewater low-temperature crystallization and melting desalination device according to claim 1 is characterized in that: The rear side of the crystallizer (1) is fixedly connected to a rear plate (25), and the side wall of the rear plate (25) is fixedly connected to a pair of hydraulic telescopic cylinders (26). The output end of the hydraulic telescopic cylinder (26) passes through the side wall of the rear plate (25) and is fixedly connected to the side wall of the liquid pump (2). A hose (37) is fixedly connected between the liquid outlet end of the liquid pump (2) and the liquid inlet end of the crystallizer (1).

6. The high-salt wastewater low-temperature crystallization and melting desalination device according to claim 1 is characterized in that: The exhaust mechanism comprises an exhaust electric telescopic cylinder (27), an L-shaped bracket (28) is fixedly connected to the outer wall of the side tube (9), a sealing cover (29) is threadedly connected to the liquid inlet end of the ton barrel (4), an exhaust groove (36) is formed through the sealing cover (29), a sliding cavity is formed inside the exhaust groove (36), an L-shaped blocking plate (30) is slidably connected to the inner side of the sliding cavity, the exhaust electric telescopic cylinder (27) is fixedly connected to the top of the L-shaped bracket (28), a side groove is formed on the side wall of the L-shaped bracket (28), an exhaust plate (31) is slidably connected to the inner side of the side groove, the exhaust electric telescopic cylinder (27) is fixedly connected to the side wall of the exhaust plate (31), and an annular groove (32) is formed inside the side tube (9).

7. The high-salt wastewater low-temperature crystallization and melting desalination device according to claim 6 is characterized in that: Three limit springs (34) are fixedly connected to the inner side of the sliding cavity, and the other ends of the three limit springs (34) are fixedly connected to the side wall of the L-shaped blocking plate (30).

8. The high-salt wastewater low-temperature crystallization and melting desalination device according to claim 6, characterized in that: A drainage pipe (33) is fixedly connected to the bottom end of the outer wall of the side tube (9), and the drainage pipe (33) is communicated with the inner side of the annular groove (32). A water pump (35) is fixedly connected to the side wall of the L-shaped bracket (28). The other end of the drainage pipe (33) is fixedly connected to the liquid inlet end of the water pump (35). The liquid outlet end of the water pump (35) is fixedly connected to a connecting pipe (38). The other end of the connecting pipe (38) is fixedly connected to the side wall of the exhaust plate (31). The outer walls of the drainage pipe (33) and the connecting pipe (38) are both fixedly connected to the outer wall of the L-shaped bracket (28).

9. A method for low-temperature crystallization and melting desalination of high-salt wastewater, the method being applicable to the high-salt wastewater low-temperature crystallization and melting desalination device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Loading the barrel: first, use a forklift to place the ton barrel (4) on the placement rack (5), and at the same time, insert the drainage pipe on the ton barrel (4) into the side pipe (9); Step 2: Automatic docking: Control the driving mechanism to squeeze the conical sealing ring (11) tightly into the drainage pipe of the ton barrel (4), thereby realizing automatic docking between the two. At the same time, the exhaust of the ton barrel (4) is opened through the exhaust mechanism, and then the valve of the drainage pipe on the ton barrel (4) is opened, and the liquid extraction pump (2) is controlled to start extracting the high-salt wastewater in the ton barrel (4); Step 3: Prepare the wastewater material. During the process of extracting the high-salt wastewater from the ton barrel (4), another ton barrel (4) can be forked and transported to the placement rack (5). After the high-salt wastewater in the previous ton barrel (4) is extracted, the side pipe (9) is transferred to the other ton barrel (4) for automatic docking.

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