Lifting evaporator

Abstract

The application relates to an evaporation device, in particular to a lifting type evaporation device. The device comprises an evaporation pool, a support, an evaporation assembly and a lifting device. The support is installed on the evaporation pool. The evaporation assembly comprises an evaporation frame vertically and slidably connected to the support and a plurality of evaporation curtains fixedly arranged on the evaporation frame. The lifting device is installed on the support and connected to the evaporation frame to drive the evaporation assembly to move up and down. When the evaporation assembly moves down, the evaporation curtains can sink into the evaporation pool. When the evaporation assembly moves up, the evaporation curtains can move above the evaporation pool. The application provides a lifting type evaporation device which is simple in structure and can protect the evaporation curtains.

Description

Technical Field

[0001] This application relates to evaporation equipment, and more particularly to a lifting evaporation device. Background Technology

[0002] Evaporation equipment concentrates salts by increasing the contact area between water and air. Related technologies often use a water distribution device to spray liquid from the evaporation tank onto an evaporation curtain for auxiliary evaporation. This type of evaporation equipment requires a relatively complex water distribution system, resulting in high manufacturing costs, and it is unable to withstand damage to the evaporation curtain caused by strong winds. Summary of the Invention

[0003] In view of this, this application provides a lifting evaporation device, which has a simple structure and can protect the evaporation curtain.

[0004] To achieve the above objectives, this application employs the following technical solution:

[0005] A lifting evaporation device is characterized by comprising an evaporation tank, a support, an evaporation assembly, and a lifting device. The support is installed on the evaporation tank. The evaporation assembly includes an evaporation rack vertically slidably connected to the support and multiple evaporation curtains fixedly installed on the evaporation rack. The lifting device is installed on the support and connected to the evaporation rack for driving the evaporation assembly to move up and down. When the evaporation assembly descends, the evaporation curtains can sink into the evaporation tank. When the evaporation assembly rises, the evaporation curtains can move to the top of the evaporation tank.

[0006] The aforementioned lifting evaporation device allows the evaporation curtain to move up and down via a lifting mechanism, enabling it to be immersed in the evaporation tank. This eliminates the need for a water distribution device to spray liquid onto the evaporation curtain, resulting in a simpler structure and lower manufacturing costs. Furthermore, in windy weather, the evaporation curtain can be adjusted to its height until it is fully submerged in the evaporation tank, thus preventing damage from strong winds, heavy rain, and hail, thereby extending its service life.

[0007] In some embodiments, the lifting device includes a rotating shaft rotatably connected to a bracket, a drum fixedly mounted on the rotating shaft, and a motor connected to the rotating shaft for driving the rotating shaft to rotate; the drum is connected to the evaporation rack via a connecting rope, and the drum drives the evaporation curtain to move up and down during rotation.

[0008] In some embodiments, the reel includes a first reel and a second reel fixedly mounted on a rotating shaft. Both the first and second reels are frustoconical in shape with a larger diameter at one end and a smaller diameter at the other end. The outer surfaces of the first and second reels are provided with helical grooves. The first reel is connected to the evaporator via a first connecting rope, the upper end of which is fixed to the larger diameter end of the first reel. The second reel is connected to a counterweight via a second connecting rope, the upper end of which is fixed to the larger diameter end of the second reel. The spiral grooves of the first reel rotate in opposite directions to those of the second reel. The drooping connecting sections of the first connecting rope and the evaporator, and the drooping connecting sections of the second connecting rope and the counterweight are located on the radial sides of the rotating shaft.

[0009] When the shaft rotates clockwise, the first connecting rope winds into the spiral groove of the first drum, from the larger diameter end to the smaller diameter end, and lifts the evaporation curtain upwards. The second connecting rope is released from the spiral groove of the second drum, from the smaller diameter end to the larger diameter end, and lifts the counterweight downwards. When the shaft rotates counterclockwise, the first connecting rope is released from the spiral groove of the first drum, from the smaller diameter end to the larger diameter end, and lifts the evaporation curtain downwards. The second connecting rope winds into the spiral groove of the second drum, from the larger diameter end to the smaller diameter end, and lifts the counterweight upwards.

[0010] Because the evaporation curtain is lightest when submerged in water, its weight gradually increases as it rises, reaching its heaviest point when fully exposed above the water surface, i.e., when gravity is at its maximum. When the first drum rotates forward, it causes the evaporation curtain to rise gradually, increasing gravity F1 from zero. The first connecting rope moves from its maximum diameter to its minimum diameter, and the lever arm r1 gradually decreases. Thus, the torque T1 on the rotating shaft from one side of the evaporation curtain slowly increases (T1=F1r1). However, when the second drum rotates forward, the second connecting rope moves from its minimum diameter to its maximum diameter, increasing the lever arm r2. Since the weight of the counterweight remains constant, gravity F2 remains constant, and the torque T2 on the rotating shaft from one side of the counterweight also increases accordingly (T2=F2r2). Because torque T2 and torque T1 are in opposite directions, torque T2 can cancel out all or part of torque T1, resulting in a smaller torque on the rotating shaft. Therefore, a motor with lower torque and power can be selected, thereby reducing manufacturing costs.

[0011] In some embodiments, baffles are provided on both sides of the first and second rolls.

[0012] In some embodiments, the evaporation curtain includes a main body, which includes a plurality of fixedly connected folded blades, each folded blade forming an alternating corrugated shape in the vertical direction.

[0013] The main body of the evaporation curtain is designed with a corrugated shape, which increases the evaporation area and prolongs the residence time of the liquid on the evaporation curtain, thus improving evaporation efficiency. Furthermore, the folded evaporation curtain is less prone to wrinkling when it descends and touches the bottom of the evaporation tank due to the presence of folds, compared to a flat evaporation curtain.

[0014] In some embodiments, the main body has a porous structure, and the included angle α between two adjacent folded blades of the main body is 10°-15°. When the main body has a porous structure and the included angle between two adjacent folded blades is selected to be 10°-15°, due to the surface tension of water, the water adheres to the pores, so the liquid hardly flows, thereby increasing the residence time of the liquid on the evaporation curtain.

[0015] In some embodiments, the evaporation curtain further includes a straight section integrally connected to the main body. On the left and right sides of the straight section, there are mounting components for fixing the evaporation curtain and facilitating its installation onto the evaporation rack. The mounting components include a first clamp and a second clamp located on the front and rear sides of the straight section. The first clamp has multiple pins, and the second clamp has multiple insertion holes for accommodating the pins. The first and second clamps clamp the straight section from the front and rear sides. The pins pass through the holes in the straight section and extend into the insertion holes, thereby fixing the straight section. The first and second clamps are fixedly connected by a locking mechanism. One of the first and second clamps is provided with a connector for easy installation onto the evaporation rack.

[0016] When two of the mounting components are installed on the evaporator rack, the straight sections can be pulled flat from both sides, thus reducing downward bending of the evaporator curtain. The locking mechanism is a snap-fit ​​structure or a bolt structure. The connecting component is a screw fixedly connected to the first and second clamping plates, and the screw is secured to the evaporator rack by a nut. One of the first and second clamping plates is provided with a guide pin, and the other of the first and second clamping plates is provided with a guide hole that mates with the guide pin. The engagement of the guide pin and the guide hole mainly serves to guide the installation.

[0017] In some embodiments, the main body is provided with connecting ropes passing through each folding blade. These connecting ropes have several spaced-apart nodes or fasteners, thus forming a folding unit by assembling the same number of folding blades. The nodes are formed by knotting the connecting ropes, or by fasteners, such as metal wires, attached to the connecting ropes. The function of these nodes or fasteners is to hold the corresponding folding blades in place. Preferably, ten folding blades are tied together at one node, thus forming multiple folding units. These folding units are relatively independent, preventing the evaporator curtain from bending downwards and ensuring that the included angle of the evaporator curtain folds is between 10° and 15°.

[0018] In some embodiments, the upper end of the connecting rope is fixedly connected to the mounting assembly. There are two connecting ropes, located on the left and right sides of the main body, respectively. As the two connecting ropes extend downwards, they gradually incline towards the center line of the main body. Since the lower folding blades of the evaporator curtain are more prone to bending, the lower part of the connecting rope is inclined towards the center line to further reduce the possibility of the evaporator curtain bending.

[0019] In some embodiments, a heat-absorbing net is provided above each evaporation curtain, and multiple capillary tubes located between two adjacent evaporation curtains and extending into the evaporation pool are fixedly connected to the heat-absorbing net.

[0020] The capillary tubes have a capillary effect, which can guide the liquid in the evaporation tank below to the heat absorption net for auxiliary evaporation. They can also make the most of the space between the two evaporation curtains. The heat absorption net is coated with a heat absorption layer, which has a high temperature and can increase the upward airflow, further improving the evaporation effect.

[0021] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0022] This application discloses a lifting evaporation device. The lifting mechanism allows the evaporation curtain to move up and down, immersing it in the evaporation tank. This eliminates the need for a water distribution device to spray liquid onto the curtain, resulting in a simpler structure and lower manufacturing costs. Furthermore, in windy conditions, the evaporation curtain can be adjusted to its height until it is fully submerged in the evaporation tank, preventing damage from strong winds, heavy rain, or hail, thus extending its service life. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0024] Figure 2 Schematic diagram of the lifting device in the embodiments of this application Figure 1 ;

[0025] Figure 3 Schematic diagram of the lifting device in the embodiments of this application Figure 2 ;

[0026] Figure 4 Force analysis diagram of the lifting device in the embodiments of this application;

[0027] Figure 5 A schematic diagram of the structure of the first roll in the embodiments of this application;

[0028] Figure 6 Cross-sectional view of the first roll in the embodiments of this application;

[0029] Figure 7 Torque variation diagram on one side of the evaporation curtain in the embodiments of this application;

[0030] Figure 8 Torque variation diagram on one side of the counterweight in the embodiments of this application;

[0031] Figure 9 This is a schematic diagram of the evaporation curtain structure in an embodiment of this application. Figure 1 ;

[0032] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0033] Figure 11 This is an exploded view of the installation components in the embodiments of this application;

[0034] Figure 12 This is a schematic diagram of the evaporation curtain structure in an embodiment of this application. Figure 2 ;

[0035] Figure 13 This is a schematic diagram of the folding structure of the evaporation curtain body in an embodiment of this application;

[0036] Figure 14 This is a schematic diagram showing the connection between the evaporator and the mounting components in an embodiment of this application;

[0037] Figure 15 This is a diagram showing the usage state of the evaporation curtain section in an embodiment of this application.

[0038] Labeling Explanation: 1. Support; 2. Evaporator; 3. Evaporator Curtain; 31. Main Body; 311. Folding Blades; 312. Centerline; 32. Straight Section; 33. Mounting Components; 331. First Clamping Plate; 3311. Pin; 3312. Screw; 3313. Guide Hole; 332. Second Clamping Plate; 3321. Insertion Hole; 3322. Snap-fit ​​Structure; 3323. Guide Pin; 34. Connecting Rope; 341. Node; 35. Nut; 4. Shaft; 5. Motor; 6. First Drum; 61. Spiral Groove; 62. Baffle; 7. Second Drum; 8. First Connecting Rope; 9. Second Connecting Rope; 10. Counterweight; 101. Heat Absorbing Net; 102. Capillary Tube; 103. Evaporation Tank. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings. The terminology used in the embodiments section of this application is only for explaining specific embodiments and is not intended to limit the application.

[0040] See Figures 1 to 15This application provides a lifting evaporation device, including an evaporation tank 103, a support 1, an evaporation assembly, and a lifting device. The support 1 is installed on the evaporation tank 103. The evaporation assembly includes an evaporation rack 2 vertically slidably connected to the support 1 and a plurality of evaporation curtains 3 fixedly installed on the evaporation rack 2. The lifting device is installed on the support 1 and connected to the evaporation rack 2 to drive the evaporation assembly to move up and down. When the evaporation assembly descends, the evaporation curtains 3 can sink into the evaporation tank 103. When the evaporation assembly rises, the evaporation curtains 3 can move above the evaporation tank 103.

[0041] This lifting evaporation device uses a lifting mechanism to move the evaporation curtain 3 up and down, allowing it to be immersed in the evaporation tank 103. This eliminates the need for a water distribution device to spray liquid onto the curtain, resulting in a simpler structure and lower manufacturing costs. Furthermore, in windy conditions, the height of the evaporation curtain 3 can be adjusted until it is fully submerged in the water of the evaporation tank 103, preventing damage from strong winds, heavy rain, and hail, thus extending its service life.

[0042] See Figure 2 and Figure 3 The lifting device includes a rotating shaft 4 rotatably connected to the bracket 1, a drum fixedly installed on the rotating shaft 4, and a motor 5 connected to the rotating shaft 4 for driving the rotating shaft 4 to rotate; the drum is connected to the evaporator rack 2 through a connecting rope 34, and the drum drives the evaporator curtain 3 to move up and down during rotation.

[0043] The reel includes a first reel 6 and a second reel 7 fixedly mounted on a rotating shaft 4. Both the first reel 6 and the second reel 7 are frustoconical in shape, with one end having a larger diameter and the other end a smaller diameter. The outer surfaces of both reels 6 and 7 are provided with spiral grooves 61. The first reel 6 is connected to the evaporator rack 2 via a first connecting rope 8, the upper end of which is fixed to the larger diameter end of the first reel 6. The second reel 7 is connected to a counterweight 10 via a second connecting rope 9, the upper end of which is fixed to the larger diameter end of the second reel 7. The spiral grooves 61 of the first reel 6 rotate in opposite directions to the spiral grooves 61 of the second reel 7. (See also...) Figure 4 The first connecting rope 8 and the drooping section of the evaporator 2, and the second connecting rope 9 and the drooping section of the counterweight 10 are respectively located on the radial sides of the rotating shaft 4; where the direction of rotation refers to the direction directly opposite to the axial direction of the rotating shaft 4, the spiral directions of the first drum 6 and the second drum 7 are opposite.

[0044] When the shaft 4 rotates clockwise, the first connecting rope 8 winds into the spiral groove 61 of the first drum 6, from the end with the larger diameter to the end with the smaller diameter, and lifts the evaporation curtain 3 upwards. The second connecting rope 9 is released from the spiral groove 61 of the second drum 7, from the end with the smaller diameter to the end with the larger diameter, and lifts the counterweight 10 downwards. When the shaft 4 rotates counterclockwise, the first connecting rope 8 is released from the spiral groove 61 of the first drum 6, from the end with the smaller diameter to the end with the larger diameter, and lifts the evaporation curtain 3 downwards. The second connecting rope 9 winds into the spiral groove 61 of the second drum 7, from the end with the larger diameter to the end with the smaller diameter, and lifts the counterweight 10 upwards.

[0045] See Figures 2 to 8 Since the evaporation curtain 33 is lightest when submerged in water, its weight gradually increases as it rises, reaching its heaviest point when fully exposed above the water surface, i.e., when the gravity is greatest. During the forward rotation of the first drum 6, the evaporation curtain 3 gradually rises, causing the gravity F1 to gradually increase from zero. The first connecting rope 8 moves from its maximum diameter point to its minimum diameter point, and the lever arm r1 gradually decreases. Thus, the torque T1 on one side of the evaporation curtain 3 relative to the rotating shaft 4 slowly increases (T1 = F1r1). See details... Figure 7 However, when the second drum 7 rotates forward, the second connecting rope 9 moves from the point of minimum diameter to the point of maximum diameter, the lever arm r2 gradually increases, the weight of the counterweight 10 remains unchanged, the gravity F2 remains unchanged, and the torque T2 on one side of the counterweight 10 relative to the rotating shaft 4 also increases accordingly (T2=F2r2), see [reference]. Figure 8 Since torque T2 is in the opposite direction to torque T1, torque T2 can cancel out all or part of torque T1. This results in a smaller torque on the rotating shaft 4, allowing for a smaller motor 5 and enabling the evaporation curtain 3 to rise and fall with low energy consumption. When the rotating shaft 4 reverses direction, the torque change patterns on one side of the evaporation curtain 3 and the counterweight 10 are opposite to those described above.

[0046] A torque sensor is also installed on the rotating shaft 4.

[0047] 1. When the wind blows, the force of the lifting rope of the evaporation curtain 3 will change due to the wind force, thus frequently changing the torque of the rotating shaft 4. The control system commands the motor 5 to run and adjust the height of the evaporation curtain 3 until it is completely submerged in water. 2. Because the evaporation rate is different in different climates, the weight of the evaporation curtain 3 continues to decrease during the evaporation process. The output value of the torque sensor on the rotating shaft 4 also decreases. The torque value system can automatically adjust the lifting frequency of the evaporation net to ensure that the system is in the optimal evaporation state.

[0048] Both sides of the first roll 6 and the second roll 7 are provided with baffles 62.

[0049] See Figures 9 to 14The evaporation curtain 3 includes a main body 31, which includes multiple fixedly connected folding blades 311. Each folding blade 311 forms an alternating corrugated shape in the vertical direction.

[0050] The main body 31 of the evaporation curtain 3 is designed with a corrugated shape, which increases the evaporation area and prolongs the residence time of the liquid on the evaporation curtain 3, thus improving evaporation efficiency. Furthermore, the folded evaporation curtain 3 is less prone to wrinkling when it descends and touches the bottom of the evaporation tank 103 due to the guiding effect of the folds.

[0051] The main body 31 has a porous structure, and the included angle α between two adjacent folded blades 311 of the main body 31 is 10°-15°. When the main body 31 has a porous structure and the included angle between two adjacent folded blades 311 is selected to be 10°-15°, due to the surface tension of water, water adheres to the pores, so the liquid hardly flows, thereby increasing the residence time of the liquid on the evaporation curtain 3.

[0052] The evaporation curtain 3 also includes a straight section 32 integrally connected to the main body 31. On the left and right sides of the straight section 32, there are mounting components 33 for fixing the evaporation curtain 3 and facilitating its installation on the evaporation rack 2. The mounting components 33 include a first clamping piece 331 and a second clamping piece 332 respectively disposed on the front and rear sides of the straight section 32. The first clamping piece 331 is provided with a plurality of pins 3311, and the second clamping piece 332 is provided with a plurality of insertion holes 3321 for accommodating the pins 3311. The first clamping piece 331 and the second clamping piece 332 clamp the straight section 32 from the front and rear sides. The pins 3311 pass through the holes on the straight section 32 and extend into the insertion holes 3321, thereby fixing the straight section 32. The first clamping piece 331 and the second clamping piece 332 are fixedly connected by a locking mechanism. One of the first clamping piece 331 and the second clamping piece 332 is provided with a connector for facilitating installation on the evaporation rack 2.

[0053] When two of the mounting components 33 are installed on the evaporator rack 2, the straight section 32 can be freely adjusted and leveled from both sides by tightening the locking nut 35. This straight section 32 acts as a load-bearing beam, reducing downward bending of the evaporator curtain 3. The locking mechanism is either a snap-fit ​​structure 3322 or a bolt structure. The connecting component is a screw 3312 fixedly connected to the first clamp 331 and the second clamp 332. The screw 3312 is fixed to the evaporator rack 2 by the nut 35. Rotating the nut 35 can adjust the tension of the straight section 32. One of the first clamp 331 and the second clamp 332 is provided with a guide pin 3323, and the other of the first clamp 331 and the second clamp 332 is provided with a guide hole 3313 that mates with the guide pin 3323. The engagement of the guide pin 3323 and the guide hole 3313 primarily serves to guide the installation.

[0054] The main body 31 is provided with connecting ropes 34 that pass through each folding blade 311. Several spaced nodes 341 or fasteners are provided on the connecting ropes 34, thus forming a folding unit by assembling the same number of folding blades 311. The nodes 341 are formed by knotting the connecting ropes 34, or by attaching fasteners, such as metal wires, to the connecting ropes 34. The function of these nodes or fasteners is to hold the corresponding folding blades 311 in place. Preferably, ten folding blades 311 are tied together with one node 341, thus forming multiple folding units. These folding units are relatively independent, so the support between units relies on the ropes rather than the curtain itself, improving the lifespan of the evaporation curtain 3. The included angle between the upper and lower folding blades of the evaporation curtain 3 can be maintained at 10-15°, and due to gravity, each folding blade is higher at both ends and lower in the middle, which is more conducive to water storage on the evaporation curtain 3.

[0055] The upper end of the connecting rope 34 is fixedly connected to the mounting component 33. There are two connecting ropes 34, which are located on the left and right sides of the main body 31. As the two connecting ropes 34 extend from top to bottom, they gradually tilt towards the center line 312 of the main body 31. Since the folding blades 311 of the evaporator curtain 3 are more prone to bending at the lower end, the connecting ropes 34 are tilted towards the center line 312 at the lower end to further reduce the possibility of the evaporator curtain 3 bending.

[0056] See Figure 15 A heat-absorbing net 101 is provided above each evaporation curtain 3, and multiple capillary tubes 102 located between two adjacent evaporation curtains 3 and extending into the evaporation pool 103 are fixedly connected to the heat-absorbing net 101.

[0057] The capillary tube 102 has a capillary effect, which can guide the liquid in the lower evaporation pool 103 to the heat absorption net 101 for auxiliary evaporation. It can also make the most of the space between the two evaporation curtains 3. The surface of the heat absorption net 101 is coated with a heat absorption layer, which has a high temperature and can increase the upward airflow, further improving the evaporation effect.

[0058] The following is a brief description of the working process and usage method of a lifting evaporator according to the above embodiments:

[0059] During operation, the lifting device moves the evaporation curtain 3 up and down. When the water on the evaporation curtain 3 is almost evaporated, it can be lowered into the evaporation tank 103. After being soaked in water, the evaporation curtain 3 rises back above the evaporation tank 103. In windy weather, the height of the evaporation curtain 3 can be adjusted according to the wind strength until it is completely submerged in the water of the evaporation tank 103, thus preventing the evaporation curtain 3 from being damaged by strong winds, heavy rain, hail, etc.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lifting-type evaporation device, characterized in that: The device includes an evaporation tank (103), a support (1), an evaporation assembly, and a lifting device. The support (1) is installed on the evaporation tank (103). The evaporation assembly includes an evaporation rack (2) vertically slidably connected to the support (1) and multiple evaporation curtains (3) fixedly installed on the evaporation rack (2). The lifting device is installed on the support (1) and connected to the evaporation rack (2) to drive the evaporation assembly to move up and down. When the evaporation assembly descends, the evaporation curtains (3) can sink into the evaporation tank (103). When the evaporation assembly rises, the evaporation curtains (3) can move above the evaporation tank (103). The lifting device includes a rotating shaft (4) rotatably connected to the support (1), a drum fixedly installed on the rotating shaft (4), and a motor (5) connected to the rotating shaft (4) to drive the rotating shaft (4) to rotate. The drum is connected to the evaporation rack (2) through a connecting rope (34). During the rotation of the drum, the evaporation curtains (3) are driven to move up and down.

2. The lifting evaporator according to claim 1, characterized in that: The reel includes a first reel (6) and a second reel (7) fixedly mounted on a rotating shaft (4). Both the first reel (6) and the second reel (7) are frustoconical in shape with a larger diameter at one end and a smaller diameter at the other end. The outer surfaces of the first reel (6) and the second reel (7) are provided with spiral grooves (61). The first reel (6) is connected to the evaporator (2) by a first connecting rope (8). The upper end of the first connecting rope (8) is fixed to the larger diameter end of the first reel (6). The second drum (7) is connected to the counterweight (10) via the second connecting rope (9). The upper end of the second connecting rope (9) is fixedly connected to the end of the second drum (7) with the larger diameter. The spiral groove (61) of the first drum (6) rotates in the opposite direction to the spiral groove (61) of the second drum (7). The lower connecting section of the first connecting rope (8) and the evaporator (2) and the lower connecting section of the second connecting rope (9) and the counterweight (10) are respectively located on the radial sides of the rotating shaft (4). When the shaft (4) rotates forward, the first connecting rope (8) winds into the spiral groove (61) of the first drum (6) from the end with the larger diameter to the end with the smaller diameter, and rises with the evaporation curtain (3). The second connecting rope (9) is released from the spiral groove (61) of the second drum (7) from the end with the smaller diameter to the end with the larger diameter, and falls with the counterweight (10). When the shaft (4) rotates in reverse, the first connecting rope (8) is released from the spiral groove (61) of the first drum (6) from the end with the smaller diameter to the end with the larger diameter, and falls with the evaporation curtain (3). The second connecting rope (9) winds into the spiral groove (61) of the second drum (7) from the end with the larger diameter to the end with the smaller diameter, and rises with the counterweight (10).

3. The lifting evaporation device according to claim 2, characterized in that: Both sides of the first roll (6) and the second roll (7) are provided with baffles (62).

4. The lifting evaporator according to claim 1, characterized in that: The evaporation curtain (3) includes a main body (31), which includes multiple fixedly connected folding blades (311), each folding blade (311) forming an alternating corrugated shape in the vertical direction.

5. A lifting evaporator according to claim 4, characterized in that: The main body (31) has a porous structure, and the included angle α between two adjacent folded blades (311) of the main body (31) is 10°-15°.

6. A lifting evaporator according to claim 4, characterized in that: The evaporation curtain (3) also includes a straight section (32) integrally connected to the main body (31). On the left and right sides of the straight section (32), there are mounting components (33) for fixing the evaporation curtain (3) and facilitating its installation on the evaporation rack (2). The mounting components (33) include a first clamping piece (331) and a second clamping piece (332) respectively disposed on the front and rear sides of the straight section (32). The first clamping piece (331) is provided with multiple pins (3311), and the second clamping piece (332) is provided with multiple... In the socket (3321) for receiving the pin (3311), the first clip (331) and the second clip (332) clamp the straight part (32) from the front and rear sides. The pin (3311) passes through the hole on the straight part (32) and extends into the socket (3321), thereby fixing the straight part (32). The first clip (331) and the second clip (332) are fixedly connected by a locking mechanism. One of the first clip (331) and the second clip (332) is provided with a connector for easy installation on the evaporator (2).

7. A lifting evaporator according to claim 6, characterized in that: The main body (31) is provided with a connecting rope (34) that passes through each folding blade (311). The connecting rope (34) is provided with several nodes (341) or fasteners that are spaced apart, so that the same number of folding blades (311) can be formed into a folding unit.

8. A lifting evaporator according to claim 7, characterized in that: The upper end of the connecting rope (34) is fixedly connected to the installation component (33). There are two connecting ropes (34) and they are located on the left and right sides of the main body (31). As the two connecting ropes (34) extend from top to bottom, they gradually tilt towards the center line (312) of the main body (31).

9. A lifting evaporator according to claim 7, characterized in that: A heat-absorbing net (101) is provided above each evaporation curtain (3), and multiple capillary tubes (102) located between two adjacent evaporation curtains (3) and extending into the evaporation pool (103) are fixedly connected to the heat-absorbing net (101).

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