High-salt water low-temperature circulation evaporative crystallization device

Abstract

The invention provides a high-salinity water low-temperature circulation evaporative crystallization device, and relates to the field of wastewater treatment, the high-salinity water low-temperature circulation evaporative crystallization device comprises a circulation assembly, a condensation assembly, an evaporation assembly, a discharge assembly and a scraping assembly; the evaporation assembly is arranged on the circulation assembly, the condensation assembly is arranged on the circulation assembly, the discharging assembly is arranged at the bottom of the evaporation assembly, the scraping assembly is arranged on the evaporation assembly, and the circulation assembly comprises two lifting frames arranged on the ground of a site. Through the arrangement of the discharging assembly and the scraping assembly, cleaning of the inner wall of the evaporation tank is achieved, so that a large number of residual scale bodies on the inner wall of the evaporation tank are effectively shoveled and scraped, the crushed scale falls to the inner bottom wall of the evaporation tank, and then the crushed scale and separated salt are discharged out of the evaporation tank through the discharging assembly at the same time; the problem that in the prior art, in the using process, a large number of scale bodies are prone to being left on the inner wall of the evaporation tank, and then the tank body is corroded after long-time use is solved.

Description

Technical Field

[0001] The invention relates to the field of wastewater treatment, and in particular to a high-salt water low-temperature circulation evaporation crystallization device. Background Art

[0002] With the rapid development of the national economy and the improvement of people's living standards, the discharge of urban domestic sewage, agricultural drainage and industrial wastewater has also increased sharply. According to statistics, more than 420 billion cubic meters of sewage are discharged into rivers, seas and lakes every year, causing 1 / 3 of fresh water to be polluted to varying degrees; a large amount of wastewater is generated by petrochemical, metallurgical, papermaking, leather, fermentation, brewing, pharmaceutical, textile printing and dyeing industries every year. Not only is the quantity large and the concentration high, but many of them also contain toxic and harmful substances, which poses a severe challenge to our environment.

[0003] However, during the use of the prior art, a large amount of scale is easily left on the inner wall of the evaporator, which leads to corrosion of the tank body during long-term use. At the same time, during the evaporation process of the wastewater, the internal salt analysis is limited, which leads to residual salt in the wastewater, so that the evaporated and condensed wastewater needs to be recovered for re-evaporation multiple times.

[0004] Therefore, we made improvements on this and proposed a high-salt water low-temperature circulating evaporation crystallization device. Summary of the invention

[0005] The object of the present invention is to provide a high-salt water low-temperature circulating evaporation crystallization device. By setting various components, the problem that a large amount of scale is easily left on the inner wall of the evaporation tank during use in the prior art is solved, which leads to tank corrosion during long-term use. At the same time, during the evaporation process of wastewater, the internal salt analysis is limited, which leads to residual salt in the wastewater, so that the evaporated and condensed wastewater needs to be recovered for re-evaporation multiple times.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: A high-salt water low-temperature circulation evaporation crystallization device, comprising a circulation component; Condensation components; Evaporation components; discharge assembly; Scrape components The evaporation component is arranged on the circulation component, the condensation component is arranged on the circulation component, the discharge component is arranged at the bottom of the evaporation component, and the scraping component is arranged on the evaporation component; The circulation assembly includes a lifting frame arranged on the ground of the site, and there are two lifting frames, one of which has a water tank on its upper surface, and the other of which has a circulation box on its upper surface; The condensation assembly includes a guide pipe fixedly connected to one side of the upper surface of the water tank and the circulation box, and one end of the guide pipe is fixedly connected to the condensation box; The evaporation assembly comprises a bracket arranged between the two lifting frames, an evaporation tank is movably connected to the bracket, a heating element is fixedly connected to the upper surface of the bracket, and the heating element is sleeved on the evaporation tank; The discharge assembly includes a mounting member arranged on one side of the heating member, a support is fixedly connected to the middle of the surface of one side of the mounting member, and a servo motor is fixedly connected to the support, and a rotary rod is fixedly connected to the output end of the servo motor; The scraping assembly includes a support fixedly connected to the middle of the upper surface of the evaporation tank, and is fixedly connected to a driving motor through the support. The output end of the driving motor penetrates and is connected to the evaporation tank, and is fixedly connected to a rotating rod.

[0007] As a preferred technical solution of the present application, the circulation component also includes a connecting plate arranged on the top of one side surface of the lifting frame, and a micro water pump is fixedly connected to the middle part of the upper surface of the connecting plate, the output end of the micro water pump is connected to the evaporation tank, and the extraction end of the micro water pump is connected to the water tank / circulation tank.

[0008] As a preferred technical solution of the present application, the upper surfaces of the water tank and the circulation box are provided with water injection pipes, the bottoms of one side surfaces of the water tank and the circulation box are provided with drainage pipes, and the water injection pipe, the drainage pipe and the output end of the micro water pump are provided with water stop valves.

[0009] As a preferred technical solution of the present application, the condensing assembly also includes an air guide pipe arranged on the top of the surface of one side of the condensing box, and the top and bottom of the inner wall of one side of the condensing box are penetrated by connecting pipes, and one end of the two connecting pipes is respectively fixedly connected with a conical spiral tube, and the cone points of the two conical spiral tubes are fixedly connected and connected, one end of the air guide pipe is penetrated and clamped on the evaporator, and the air stop valve is provided on the air guide pipe.

[0010] As a preferred technical solution of the present application, the evaporation component also includes a discharge groove opened in the middle of the inner bottom wall of the evaporation tank, and a plug body is movably connected to the discharge groove. The inner side wall of the evaporation tank is provided with a double-threaded groove, and the double-threaded grooves are arranged in opposite directions and cross-connected.

[0011] As a preferred technical solution of the present application, the discharge assembly also includes a clamping piece fixedly connected to the middle part of the lower surface of the plug body, the clamping piece is movably clamped with an inclined rod, the end of the inclined rod close to the rotating rod is commonly clamped with the same sleeve rod, the inner side walls at both ends of the sleeve rod are respectively fixedly connected with return springs, and the bottom ends of the inclined rod and the rotating rod are respectively fixedly connected to one end of the return spring.

[0012] As a preferred technical solution of the present application, a limiting seat is fixedly connected to the edge of the lower surface of the evaporator, the plug body is movably connected to the limiting seat, a circular plate is fixedly connected to the bottom of the plug body, a support rod is fixedly connected to the edge of the upper surface of the circular plate, a sliding groove matching the support rod is provided on the lower surface of the limiting seat, an extension spring is fixedly connected to the top end of the support rod, and the top end of the extension spring is fixedly connected to the inner top wall of the sliding groove.

[0013] As a preferred technical solution of the present application, the scraping assembly also includes a connecting groove opened with the middle part of the rotating rod, the bottom end of the rotating rod is fixedly connected with a sleeve, the rotating rod is slidably connected with a limiting member through the connecting groove, and the limiting member and the outer arc surface of the sleeve are fixedly connected with a scraping member.

[0014] As a preferred technical solution of the present application, the number of the scrapers is several, and the scrapers are evenly divided into two groups. Each group of scrapers is evenly distributed on the limiting member and the sleeve. The outer surface of the scraper on the limiting member is movably clamped with a tilting block, and the tilting block is adapted to the double thread groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of this application: 1. The inner wall of the evaporator can be cleaned by the provided discharge assembly and scraper assembly, thereby effectively removing and scraping a large amount of scale remaining on the inner wall of the evaporator, so that the scale fragments fall to the inner bottom wall of the evaporator, and then are discharged from the evaporator through the discharge assembly together with the precipitated salt, thereby achieving the purpose of cleaning the inner wall of the tank, solving the problem in the prior art that a large amount of scale is easily left on the inner wall of the evaporator during use, and then the tank body is corroded during long-term use; 2. By setting up a condensation component, an evaporation component and a circulation component, the recycling treatment of wastewater is realized, and the same wastewater is evaporated multiple times, thereby effectively reducing the operations required for the existing technology to circulate wastewater, and then effectively reducing the operating burden of the staff, and solving the problem that during the evaporation process of the existing technology, the internal salt analysis of the wastewater is limited, and then there is residual salt in the wastewater, so that the evaporated and condensed wastewater needs to be recovered for re-evaporation multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the overall structural schematic diagrams of the high-salt water low-temperature circulation evaporation crystallization device provided in this application; Figure 2 This is the second overall structural schematic diagram of the high-salt water low-temperature circulation evaporation crystallization device provided in this application; Figure 3A schematic diagram of the structure of the discharge assembly of the high-salt water low-temperature circulation evaporation crystallization device provided in this application; Figure 4 A schematic diagram of a partial cross-section structure of a discharge assembly of a high-salt water low-temperature circulation evaporation crystallization device provided in this application; Figure 5 A schematic cross-sectional structure diagram of a limiting seat of a high-salt water low-temperature circulating evaporation crystallization device provided in this application; Figure 6 This is one of the schematic cross-sectional structures of the evaporation tank of the high-salt water low-temperature circulation evaporation crystallization device provided in this application; Figure 7 This is the second schematic diagram of the cross-section structure of the evaporation tank of the high-salt water low-temperature circulation evaporation crystallization device provided in this application; Figure 8 This is a schematic diagram of the cross-sectional structure of the condenser box of the high-salt water low-temperature circulating evaporation crystallization device provided in this application.

[0017] Indicated in the figure: 1. Circulation assembly; 11. Lifting frame; 12. Water tank; 13. Circulation box; 14. Connecting plate; 15. Micro water pump; 16. Water injection pipe; 17. Drain pipe; 2. Condensation assembly; 21. Flow guide pipe; 22. Condensation box; 23. Air guide pipe; 24. Connecting pipe; 25. Conical spiral pipe; 3. Evaporation assembly; 31. Bracket; 32. Evaporation tank; 33. Heating element; 34. Discharging chute; 35. Plug body; 36. Double thread groove; 4. Discharge assembly; 41. Mounting part; 42. Servo motor; 43. Rotary rod; 44. Snap-on part; 45. Oblique rod; 46. Sleeve rod; 47. Return spring; 48. Limit seat; 49. Round plate; 410. Support rod; 411. Slide groove; 412. Extension spring; 5. Scraping component; 51. Driving motor; 52. Rotating rod; 53. Connecting groove; 54. Sleeve; 55. Limiting member; 56. Scraping member; 57. Tilt block. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0019] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] See also Figures 1 to 8 The present invention provides a technical solution: a high-salt water low-temperature circulation evaporation crystallization device.

[0024] Embodiment 1:

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, this embodiment proposes a high-salt water low-temperature circulation evaporation crystallization device, including a circulation component 1, a condensation component 2, an evaporation component 3, a discharge component 4 and a scraping component 5; the evaporation component 3 is arranged on the circulation component 1, the condensation component 2 is arranged on the circulation component 1, the discharge component 4 is arranged at the bottom of the evaporation component 3, and the scraping component 5 is arranged on the evaporation component 3.

[0026] Embodiment 2:

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the circulation component 1 includes a lifting frame 11 arranged on the ground of the site, and there are two lifting frames 11, one of which is provided with a water tank 12 on the upper surface of one lifting frame 11, and the other lifting frame 11 is provided with a circulation box 13 on the upper surface. The circulation component 1 also includes a connecting plate 14 arranged on the top of the surface of one side of the lifting frame 11, and a micro water pump 15 is fixedly connected to the middle of the upper surface of the connecting plate 14. The output end of the micro water pump 15 is connected to the evaporation tank 32, and the extraction end of the micro water pump 15 is connected to the water tank 12 / circulation box 13. The upper surfaces of the water tank 12 and the circulation box 13 are provided with a water injection pipe 16, and the bottoms of the surfaces of one side of the water tank 12 and the circulation box 13 are provided with a drainage pipe 17. The water injection pipe 16, the drainage pipe 17 and the output end of the micro water pump 15 are provided with an air stop valve.

[0028] Embodiment 3:

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the condensing component 2 includes a guide pipe 21 fixedly connected to one side of the upper surface of the water tank 12 and the circulation box 13, one end of the guide pipe 21 is fixedly connected to the condensing box 22, and the condensing component 2 also includes an air guide pipe 23 arranged on the top of the surface of one side of the condensing box 22, and the top and bottom of the inner wall of one side of the condensing box 22 are penetrated and clamped with connecting pipes 24, one end of the two connecting pipes 24 are respectively fixedly connected with conical spiral tubes 25, the cone points of the two conical spiral tubes 25 are fixedly connected and connected, one end of the air guide pipe 23 is penetrated and clamped on the evaporating tank 32, and the air guide pipe 23 is provided with an air stop valve.

[0030] Demonstratively, the air stop valve is opened to allow steam to enter the air duct 23, and then enter the interior of the condensation box 22 through the air duct 23, and then condense through the conical spiral tube 25. The condensed water vapor adheres to the conical spiral tube 25, and then rotates and slides down the conical spiral tube 25 by gravity, and finally falls to the bottom of the condensation box, and then enters the interior of the condensation box 22 through the guide tube 21.

[0031] Embodiment 4:

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the evaporation component 3 includes a bracket 31 arranged between the two lifting frames 11, the bracket 31 is movably connected with an evaporation tank 32, the upper surface of the bracket 31 is fixedly connected with a heating element 33, the heating element 33 is sleeved on the evaporation tank 32, the evaporation component 3 also includes a discharge groove 34 opened in the middle of the inner bottom wall of the evaporation tank 32, the discharge groove 34 is movably connected with a plug body 35, and the inner side wall of the evaporation tank 32 is provided with a double-thread groove 36, and the double-thread grooves 36 are oppositely arranged and cross-connected.

[0033] Embodiment 5:

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the discharge component 4 includes a mounting member 41 arranged on one side of the heating member 33, the middle part of the surface of one side of the mounting member 41 is fixedly connected with a support, and is fixedly connected with a servo motor 42 through the support, and the output end of the servo motor 42 is fixedly connected with a rotary rod 43, and the discharge component 4 also includes a clamping member 44 fixedly connected to the middle part of the lower surface of the plug body 35, and the clamping member 44 is movably clamped with an inclined rod 45, and the inclined rod 45 and the end close to the rotary rod 43 are jointly clamped with the same sleeve rod 46, and the inner side walls at both ends of the sleeve rod 46 are respectively fixed A return spring 47 is fixedly connected, and the bottom ends of the inclined rod 45 and the rotating rod 43 are fixedly connected to one end of the return spring 47 respectively. A limiting seat 48 is fixedly connected to the edge of the lower surface of the evaporator 32, and the plug body 35 is movably connected to the limiting seat 48. A circular plate 49 is fixedly connected to the bottom of the plug body 35, and a support rod 410 is fixedly connected to the edge of the upper surface of the circular plate 49. A slide groove 411 adapted to the support rod 410 is provided on the lower surface of the limiting seat 48, and an extension spring 412 is fixedly connected to the top of the support rod 410, and the top end of the extension spring 412 is fixedly connected to the inner top wall of the slide groove 411.

[0035] Exemplarily, the output end of the servo motor 42 rotates and drives the rotary rod 43 to rotate, so that the sleeve rod 46 drives the inclined rod 45 to rotate with the rotary rod 43, and the clamping member 44 falls, thereby driving the circular plate 49 to move synchronously, and then the support rod 410 is pulled out and the extension spring 412 is stretched, so that the plug body 35 is separated from the evaporation tank 32, and then the crystals can be discharged through the discharge chute 34.

[0036] Embodiment 6:

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the scraping assembly 5 includes a support fixedly connected to the middle part of the upper surface of the evaporation tank 32, and is fixedly connected to a driving motor 51 through the support, the output end of the driving motor 51 is connected to the evaporation tank 32 through the evaporation tank 32, and is fixedly connected to a rotating rod 52, the scraping assembly 5 also includes a connecting groove 53 opened with the middle part of the rotating rod 52, the bottom end of the rotating rod 52 is fixedly connected to a sleeve 54, the rotating rod 52 is slidably connected to a limiting member 55 through the connecting groove 53, the limiting member 55 and the outer arc surface of the sleeve 54 are fixedly connected to a scraping member 56, the number of the scraping members 56 is several, and the several scraping members 56 are evenly divided into two groups, each group of scraping members 56 is evenly distributed on the limiting member 55 and the sleeve 54, the outer surface of the scraping member 56 on the limiting member 55 is movably connected to a tilting block 57, and the tilting block 57 is adapted to the double-thread groove 36.

[0038] Embodiment 7:

[0039] The solution in the above embodiment is further introduced below in combination with a specific working method, as described below for details: Specifically, when the high-salt water low-temperature circulation evaporation crystallization device is working / in use: The air stop valve is opened, so that steam enters the air guide pipe 23, and enters the interior of the condensation box 22 through the air guide pipe 23, and then condenses through the conical spiral tube 25. The condensed water vapor adheres to the conical spiral tube 25, and then rotates and slides down the conical spiral tube 25 by gravity, and finally falls to the bottom of the condensation box, and then enters the interior of the condensation box 22 through the guide pipe 21. The output end of the servo motor 42 rotates, and the rotary rod 43 is adjusted to rotate, so that the sleeve rod 46 drives the inclined rod 45 to rotate with the rotary rod 43, and the clamping part 44 falls, thereby driving the circular plate 49 to move synchronously, and then the support rod 410 is pulled out, and the extension spring 412 is stretched, so that the plug body 35 is separated from the evaporation tank 32, and then the crystals can be discharged through the discharge chute 34.

[0040] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A high-salt water low-temperature circulation evaporation crystallization device, characterized in that : including a loop component (1); Condensation assembly (2); Evaporation assembly (3); Discharge assembly (4); Scraping components (5) The evaporation component (3) is arranged on the circulation component (1), the condensation component (2) is arranged on the circulation component (1), the discharge component (4) is arranged at the bottom of the evaporation component (3), and the scraping component (5) is arranged on the evaporation component (3); The circulation component (1) comprises a lifting frame (11) arranged on the ground of the site, wherein there are two lifting frames (11), one of which has a water tank (12) on its upper surface, and the other of which has a circulation box (13) on its upper surface; The condensation assembly (2) comprises a flow guide pipe (21) fixedly connected to one side of the upper surface of the water tank (12) and the circulation tank (13); one end of the flow guide pipe (21) is fixedly connected to the condensation tank (22); The evaporation assembly (3) comprises a bracket (31) arranged between the two lifting frames (11), an evaporation tank (32) being movably clamped on the bracket (31), a heating element (33) being fixedly connected to the upper surface of the bracket (31), and the heating element (33) being sleeved on the evaporation tank (32); The discharge assembly (4) comprises a mounting member (41) arranged on one side of the heating member (33); a support is fixedly connected to the middle of one side surface of the mounting member (41); a servo motor (42) is fixedly connected to the support; and a rotary rod (43) is fixedly connected to the output end of the servo motor (42); The scraping assembly (5) comprises a support fixedly connected to the middle part of the upper surface of the evaporation tank (32), and is fixedly connected to a drive motor (51) via the support; an output end of the drive motor (51) penetrates and is connected to the evaporation tank (32), and is fixedly connected to a rotating rod (52).

2. A high-salt water low-temperature circulation evaporation crystallization device according to claim 1, characterized in that: The circulation assembly (1) further comprises a connecting plate (14) arranged at the top of a surface of one side of the lifting frame (11), a micro water pump (15) being fixedly connected to the middle of the upper surface of the connecting plate (14), an output end of the micro water pump (15) being connected to the evaporation tank (32), and an extraction end of the micro water pump (15) being connected to the water tank (12) / circulation tank (13).

3. A high-salt water low-temperature circulation evaporation crystallization device according to claim 2, characterized in that: A water injection pipe (16) is provided on the upper surface of the water tank (12) and the circulation box (13); a drainage pipe (17) is provided on the bottom of one side surface of the water tank (12) and the circulation box (13); and an air stop valve is provided on the output end of the water injection pipe (16), the drainage pipe (17) and the micro water pump (15).

4. A high-salt water low-temperature circulation evaporation crystallization device according to claim 1, characterized in that: The condensing assembly (2) further comprises an air guide pipe (23) arranged at the top of the surface of one side of the condensing box (22); the top and the bottom of the inner wall of one side of the condensing box (22) are penetrated and clamped with a connecting pipe (24); one end of two connecting pipes (24) are respectively fixedly connected with a conical spiral pipe (25); the two conical spiral pipes (25) are fixedly connected at the cone point and communicate with each other; one end of the air guide pipe (23) is penetrated and clamped on the evaporating tank (32); and a gas stop valve is provided on the air guide pipe (23).

5. The high-salt water low-temperature circulation evaporation crystallization device according to claim 1, characterized in that: The evaporation assembly (3) further comprises a discharge groove (34) provided in the middle of the inner bottom wall of the evaporation tank (32), a plug body (35) being movably engaged with the discharge groove (34), and a double-thread groove (36) being provided on the inner side wall of the evaporation tank (32), the double-thread grooves (36) being arranged opposite to each other and cross-connected.

6. A high-salt water low-temperature circulation evaporation crystallization device according to claim 5, characterized in that: The discharge assembly (4) further comprises a clamping member (44) fixedly connected to the middle part of the lower surface of the plug body (35), the clamping member (44) being movably clamped with an inclined rod (45), the inclined rod (45) and the end close to the rotary rod (43) being clamped with a same sleeve rod (46), the inner side walls at both ends of the sleeve rod (46) being respectively fixedly connected with return springs (47), the bottom ends of the inclined rod (45) and the rotary rod (43) being respectively fixedly connected with one end of the return spring (47).

7. The high-salt water low-temperature circulation evaporation crystallization device according to claim 5, characterized in that: A limiting seat (48) is fixedly connected to the edge of the lower surface of the evaporator (32); the plug body (35) is movably connected to the limiting seat (48); a circular plate (49) is fixedly connected to the bottom of the plug body (35); a support rod (410) is fixedly connected to the edge of the upper surface of the circular plate (49); a sliding groove (411) adapted to the support rod (410) is formed on the lower surface of the limiting seat (48); an extension spring (412) is fixedly connected to the top end of the support rod (410); and the top end of the extension spring (412) is fixedly connected to the inner top wall of the sliding groove (411).

8. The high-salt water low-temperature circulation evaporation crystallization device according to claim 5, characterized in that: The scraping assembly (5) further comprises a communicating groove (53) opened in the middle of the rotating rod (52); a sleeve (54) is fixedly connected to the bottom end of the rotating rod (52); a limiting member (55) is slidably engaged with the rotating rod (52) through the communicating groove (53); and a scraping member (56) is fixedly connected to the outer arc surface of the limiting member (55) and the sleeve (54).

9. A high-salt water low-temperature circulation evaporation crystallization device according to claim 8, characterized in that: The scraping members (56) are in a plurality and are evenly divided into two groups. The scraping members (56) in each group are evenly distributed on the limiting member (55) and the sleeve (54). The outer surfaces of the scraping members (56) on the limiting member (55) are movably clamped with tilting blocks (57), and the tilting blocks (57) are adapted to the double-thread grooves (36).

Images