Extra-large titanium fan

Abstract

The utility model relates to the technical field of titanium fans, in particular to an extra-large titanium fan. According to the technical scheme, the evaporator comprises an evaporation part, the evaporation part comprises a shell, an evaporation cavity and a spiral flow guide groove, the evaporation cavity is formed in the shell, the spiral flow guide groove is fixedly formed in the inner wall of the evaporation cavity, the side portion of an impeller is rotationally connected with the shell through a rotating shaft, and the impeller is located in the center of the evaporation cavity; the spiral axis of the spiral flow guide groove and the axis of the impeller are located on the same straight line. The non-evaporated concentrated salt solution sprayed on the impeller is thrown into the spiral flow guide groove through rotation of the impeller, the non-evaporated concentrated salt solution is guided to move to the position over the impeller through the spiral flow guide groove, the non-evaporated concentrated salt solution collides with the spraying piece to be broken, the non-evaporated concentrated salt solution falls onto the impeller again, and the impeller throws the concentrated salt solution into the spiral flow guide groove many times. The utilization rate is improved; and the temperature of the impeller is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of titanium fans, and in particular to an extra-large titanium fan. Background Art

[0002] Flue gas is a common type of pollution. It is produced in industrial production. It is a mixture of gas and smoke and is the main cause of air pollution in residential areas. In order to reduce flue gas pollution, low-temperature flue gas salt wastewater is evaporated and concentrated using flue gas heat. The evaporated water vapor is carried by the flue gas and removed by the demister to remove droplets before mixing with the original flue gas into the desulfurization system to remove harmful substances in the flue gas and prevent toxic and harmful gas leakage and environmental pollution. In order to improve the flue gas treatment effect, titanium fans are usually used to assist the evaporation of salt solutions, increase the air flow rate using titanium fans, and use the heat generated by the rotation of the impeller in the titanium fan to evaporate the concentrated salt solution.

[0003] Publication number CN114307515B proposes a flue gas multiple recovery and utilization system based on energy conservation and emission reduction. The system increases the flue gas circulation by rotating the fan impeller, and preheats the brine by connecting the mixing tank to the boiler to improve the evaporation efficiency of the brine. The heat in the flue gas can be effectively absorbed and used to heat the desalted water, thereby improving the recovery and utilization rate of the flue gas waste heat.

[0004] However, when the fan rotates to increase ventilation, it will also generate heat. Although preheating the brine can speed up the evaporation of brine, the cooling effect of the preheated brine on the fan is reduced. The metallographic structure of the welding position is changed due to thermal deformation and heat diffusion, resulting in an unbalanced impeller center of gravity offset. Summary of the invention

[0005] The purpose of the present invention is to provide an extra-large titanium fan in view of the problem in the background technology that the cooling effect of the preheated brine on the fan is reduced.

[0006] The technical solution of the present invention is: an extra-large titanium fan, comprising:

[0007] A steel base, a motor is fixedly mounted on the top of the steel base, the motor is rotatably connected to a coupling via a rotating shaft, and an impeller is fixedly mounted on the end of the coupling;

[0008] The evaporator comprises a shell, an evaporation chamber and a spiral guide groove, wherein the evaporation chamber is provided inside the shell, the spiral guide groove is fixedly installed on the inner wall of the evaporation chamber, the side of the impeller is rotatably connected with the shell through a rotating shaft, the impeller is located at the center of the evaporation chamber, and the spiral axis of the spiral guide groove and the axis of the impeller are located on the same straight line;

[0009] The speed change part includes a docking shaft, a slider, a return spring, a linkage rod and a conversion part. The docking shaft is elastically connected to the slider through the return spring. The side of the slider is hinged to the linkage rod through a pin. The end of the linkage rod is hinged to the swivel gear. The side of the swivel gear is coaxially fixedly connected to the bevel gear.

[0010] The spraying part includes a slotted gear, an injection spiral tube, an injection barrel and a gear set, wherein the inner wall of the injection barrel is rotatably connected to the injection spiral tube, the end of the injection spiral tube is fixedly connected to the slotted gear, the slotted gear is meshedly connected to the gear set, and the injection barrel is connected to the housing through a lower pipe;

[0011] The slotted gear is located on the extension line of the conversion member, and the conversion member slides on the outer wall of the docking shaft and is meshedly connected with the gear set.

[0012] Optionally, the shell adopts a volute structure, the impeller rotates counterclockwise to cut the wind, the spiral guide groove is a counterclockwise spiral and extends toward the inside of the shell, and a concentrated salt solution is arranged inside the injection barrel. The concentrated salt solution contacts the counterclockwise rotating impeller and is centrifugally thrown out along the tangential direction of the outer wall of the impeller, and the thrown concentrated salt solution flows along the spiral guide groove.

[0013] Optionally, a recovery box is fixedly installed at the bottom of the shell, and the shell is connected to the recovery box through a connecting port, the connecting port is located at the spiral end of the spiral guide groove, and an air outlet is opened at the center of the shell, and the air outlet is coaxial with the impeller.

[0014] Optionally, the speed-changing component further comprises a rotating wheel, a side portion of which is rotatably connected to the housing, the rotating wheel is fixedly connected to the docking shaft via a guide rod, the slider slides on the rod body of the guide rod, and the side wall of the guide rod contacts the rotating wheel.

[0015] Optionally, the conversion part includes a swivel gear and a bevel gear, the bevel gear is fixedly mounted on the side of the swivel gear, the slotted gear is located on the extension line of the rotating wheel, a bevel gear groove is provided on the side of the slotted gear facing the bevel gear, the end of the docking shaft is rotatably connected to the slotted gear, and the diameter of the swivel gear is larger than the diameter of the slotted gear.

[0016] Optionally, the gear set includes two gears and a rotating shaft, one of the gears is meshed and connected with the slotted gear, and when the bevel gear is meshed and connected with the slotted gear, the swivel gear is misaligned with another gear of the gear set; when the swivel gear is meshed with another gear of the gear set, the bevel gear is separated from the slotted gear.

[0017] Optionally, the bottom of the lower connecting pipe is connected to a spray plate, the arc surface of the spray plate has the same curvature as the arc surface of the impeller at its position, and the bottom of the spray plate is provided with a middle spray hole and a side spray hole, and the middle spray hole and the side spray hole are both facing the impeller.

[0018] Optionally, a fixed plate is fixedly installed on the top of the spray plate, the injection barrel is fixedly installed on the side of the fixed plate, a gear in the gear group is rotatably connected to the fixed plate via a rotating shaft, an upper connecting pipe is fixedly installed on the top of the injection barrel, the upper connecting pipe is connected to a concentrated salt solution tank, and the lower connecting pipe and the upper connecting pipe are respectively located at both ends of the injection barrel.

[0019] Optional, A transmission member is arranged at the center of the rotating wheel. The transmission member includes two rotating shafts with gears at their ends, and the two rotating shafts are meshed with each other through the end gears. One of the rotating shafts is fixedly installed at the side center of the rotating wheel, and a gear is fixedly installed in the middle of the coupling, and the other rotating shaft is meshed with the middle gear of the coupling through the end gears.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] The present invention throws the unevaporated concentrated salt solution sprayed thereon into the spiral guide groove through the rotation of the impeller, and uses the spiral guide groove to guide the unevaporated concentrated salt solution to move it to just above the impeller, and collides with the spraying part to break it and fall onto the impeller again. The impeller throws the concentrated salt solution into the spiral guide groove for multiple times without preheating. The concentrated salt solution contacts the impeller multiple times, which plays a role of fully utilizing the concentrated salt solution to make it completely evaporate, improving the utilization rate and reducing the impeller temperature.

[0022] Furthermore, the middle spray hole of the spray plate is used to evenly spray the impeller, and the side spray holes on the spray plate are used to flush the impeller to prevent some salt from crystallizing and adhering to the impeller when the impeller evaporates the concentrated salt solution. The presence of crystallized salt affects the contact between the concentrated salt solution and the impeller, thereby deteriorating the evaporation effect. The long-term attachment of crystallized salt will cause corrosion to the impeller.

[0023] Furthermore, when the rotation speed of the impeller increases, the position of the slider is changed by utilizing the change in the rotating centrifugal force of the impeller, and the slider uses the linkage rod to change the position of the conversion member, thereby increasing the rotation speed of the slotted gear through the gear ratio, increasing the spray volume of the concentrated salt solution, and improving the cooling effect on the impeller, thereby preventing the impeller from being overheated due to the increase in rotation speed and causing thermal deformation, and at the same time improving the evaporation efficiency of the concentrated salt solution to fully utilize the heat of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Provide a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 A schematic diagram of the coupling structure of an embodiment of the present invention is given;

[0026] Figure 3 A schematic cross-sectional view of a shell structure according to an embodiment of the present invention is provided;

[0027] Figure 4 A schematic diagram of the structure of a swivel gear according to an embodiment of the present invention is provided;

[0028] Figure 5 A schematic cross-sectional view of a syringe structure according to an embodiment of the present invention is provided;

[0029] Figure 6 A right side cross-sectional schematic diagram of a shell structure of an embodiment of the present invention is given;

[0030] Figure 7 A schematic diagram of the spiral guide groove structure of an embodiment of the present invention is given;

[0031] Figure 8 Given Figure 7 An enlarged schematic diagram of the connecting port structure of part A.

[0032] Reference numerals: 1, steel base; 2, evaporation element; 21, shell; 22, evaporation chamber; 23, spiral guide groove; 24, communication port; 25, recovery box; 26, air outlet; 3, impeller;

[0033] 4. Motor; 5. Coupling; 6. Transmission part; 7. Speed-changing part; 71. Rotating wheel; 72. Docking shaft; 73. Guide rod; 74. Sliding block; 75. Return spring; 76. Linkage rod; 77. Swivel gear; 78. Bevel gear; 8. Spraying part; 81. Fixed plate; 82. Slotted gear; 83. Injection spiral tube; 84. Injection cylinder; 85. Upper connecting pipe; 86. Lower connecting pipe; 87. Spraying plate; 88. Gear set. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0035] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0036] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Example 1

[0040] This embodiment proposes a super large titanium fan, such as Figure 1 and 2 As shown, it includes a steel base 1, a motor 4 is fixedly installed on the top of the steel base 1, and the motor 4 is connected to the coupling 5 by a rotating shaft, and the impeller 3 is fixedly installed at the end of the coupling 5. The impeller 3 is driven by the motor 4 to rotate and accelerate the flow of smoke, and the coupling 5 supports the rotating shaft of the motor 4 to avoid breakage. The impeller 3 is welded by argon gas shielded welding. Since the titanium 9 plate is thick, one-time welding cannot meet the requirements. Multi-layer welding is adopted, and the welding temperature, welding amount, current and voltage of each layer are strictly controlled. The welding temperature is controlled at 2500-3000℃, the current is controlled at 190-200A, and the voltage is controlled at 14-18V. Under the premise of ensuring quality, the metallographic structure changes of the welding position caused by thermal deformation and heat diffusion are controlled. After welding is completed, the welding stress is removed by overall vibration aging.

[0041] The motor adopts variable frequency motor, which is connected to the main control room and can be adjusted with one key on the console according to the actual situation. Real-time monitoring realizes digital and intelligent management.

[0042] like Figure 3As shown, an evaporator 2 is fixedly installed on the side of the steel base 1, and a speed change part 7 and a spray part 8 are arranged inside the evaporator 2, and the spray part 8 sprays a concentrated salt solution; the evaporator 2 includes a shell 21, an evaporation cavity 22 and a spiral guide groove 23, the shell 21 is provided with an evaporation cavity 22, and the inner wall of the evaporation cavity 22 is fixedly installed with the spiral guide groove 23, the side of the impeller 3 is rotatably connected to the shell 21 through a rotating shaft, the impeller 3 is located at the center of the evaporation cavity 22, and the spiral axis of the spiral guide groove 23 is on the same straight line as the axis of the impeller 3.

[0043] The connection between the impeller 3 and the evaporator 2 is sealed with a packing, in which the packing material is made of high-quality polytetrafluoroethylene instead of the original graphite packing, which has better sealing performance and less friction, better ensuring that there is no leakage of liquid and gas, and protecting the equipment.

[0044] The impeller 3 adopts a new type of back-cut wind structure to ensure the stability of the output air volume, and no liquid will accumulate at the root of the blade during operation, which protects the blade and increases the service life. According to the air volume, wind pressure and on-site working conditions, the number of main blades is 10, the structure is a large arc structure, and the blade angle is tangent to the air inlet trajectory, which minimizes the resistance and friction during operation, thereby improving the overall performance of the fan and reducing energy consumption. The auxiliary blades are selected as 8 pieces, evenly arranged, and back-strengthened to make the operation more stable.

[0045] like Figure 7 As shown, the shell 21 adopts a volute structure, the impeller 3 rotates counterclockwise to cut the wind, the spiral guide groove 23 is a counterclockwise spiral and extends toward the inside of the shell 21, and a concentrated salt solution is arranged inside the injection cylinder 84. The concentrated salt solution contacts the counterclockwise rotating impeller 3 and is centrifugally thrown out along the tangent direction of the outer wall of the impeller 3, and the thrown concentrated salt solution flows along the spiral guide groove 23.

[0046] As the concentrated salt solution in the spray element 8 is sprayed onto the impeller 3, the temperature generated by the rotation of the impeller 3 is used to heat the concentrated salt solution, causing it to evaporate and mix with the flue gas to remove harmful substances in the flue gas. The concentrated salt solution sprayed on the impeller 3 is not completely evaporated due to insufficient temperature. The unevaporated concentrated salt solution is thrown out by the impeller 3, thrown out along the tangent of the outer wall of the impeller 3, and enters the spiral guide groove 23. Since the spiral axis of the spiral guide groove 23 and the axis of the impeller 3 are located on the same straight line, when the concentrated salt solution thrown out by the impeller 3 enters the spiral guide groove 23, the entry angle is small with the included angle of the spiral guide groove 23, so that the thrown concentrated salt solution is prevented from directly impacting and breaking, and the concentrated salt solution entering the spiral guide groove 23 will move along the spiral guide groove 23.

[0047] The concentrated salt solution moves to the top of the impeller 3 under the guidance of the spiral guide groove 23 and collides with the spray part 8 to break into small concentrated salt solution droplets, which are heated again. Under the guidance of the spiral guide groove 23, the concentrated salt solution moves to the top of the impeller 3 for heating multiple times, so that the concentrated salt solution is completely evaporated. At the same time, multiple contacts with the impeller 3 can also make full use of the concentrated salt solution for heat exchange and cool the impeller 3.

[0048] like Figure 6 As shown, a recovery box 25 is fixedly installed at the bottom of the housing 21, and the housing 21 is connected to the recovery box 25 through a connecting port 24, and the connecting port 24 is located at the spiral end of the spiral guide groove 23. An air port 26 is opened at the center of the housing 21, and the air port 26 is coaxial with the impeller 3. The concentrated salt solution that is not completely evaporated will be guided by the spiral guide groove 23 into the connecting port 24 and enter the recovery box 25, so as to be recycled and reused to avoid waste.

[0049] In this embodiment, the impeller 3 rotates to throw the unevaporated concentrated salt solution sprayed thereon into the spiral guide groove 23, and the spiral guide groove 23 is used to guide the unevaporated concentrated salt solution to move to the top of the impeller 3, and collides with the spray part 8 to break and fall onto the impeller 3 again. The impeller 3 throws the concentrated salt solution into the spiral guide groove 23 multiple times without preheating. The concentrated salt solution contacts the impeller 3 multiple times, and the concentrated salt solution is fully utilized for heat exchange to make it completely evaporated.

[0050] Example 2

[0051] Based on Example 1, this example proposes an extra-large titanium fan, such as Figure 4 and 5 As shown, the spraying member 8 includes a slotted gear 82, an injection spiral tube 83, an injection barrel 84 and a gear set 88. The inner wall of the injection barrel 84 is rotatably connected to the injection spiral tube 83, the end of the injection spiral tube 83 is fixedly connected to the slotted gear 82, the slotted gear 82 is meshedly connected to the gear set 88, the injection barrel 84 is connected to the housing 21 through the lower pipe 86, and the top of the injection barrel 84 is fixedly installed with an upper pipe 85, which is connected to a concentrated salt solution tank. The concentrated salt solution in the injection barrel 84 is injected from the lower pipe 86 into the spray plate 87 through the rotation of the injection spiral tube 83, and then the concentrated salt solution is injected into the housing 21 by the spray plate 87 to spray the impeller 3.

[0052] like Figure 6 As shown, the bottom of the lower connecting pipe 86 is connected to a spray plate 87, and the arc surface of the spray plate 87 has the same curvature as the arc surface of the impeller 3 at its position. The spray plate 87 leaks out of the shell 21 and is located on the spiral path of the spiral guide groove 23, so that the concentrated salt solution guided by the spiral guide groove 23 collides with it, breaks, and falls onto the impeller 3.

[0053] The bottom of the spray plate 87 is provided with a middle spray hole and a side spray hole, both of which face the impeller 3. The middle spray hole sprays concentrated salt solution, and the side spray hole sprays flushing water. The middle spray hole continuously sprays concentrated salt solution to spray the inside of the impeller and the blades, and the side spray hole sprays water continuously at 0.2Mpa, effectively removing the heat energy brought by the high-speed rotation of the impeller, and no foreign matter such as particles and powder that affect the balance of the impeller can be attached to the inside of the impeller. Ensure that the dynamic balance of the impeller is not destroyed during continuous operation.

[0054] In this embodiment, the concentrated salt solution in the injection barrel 84 is injected into the spray plate 87 through the continuous rotation of the injection spiral tube 83, and is evenly sprayed on the impeller 3 through the middle spray hole of the spray plate 87. At the same time, the impeller 3 is flushed with the lateral spray holes on the spray plate 87 to prevent some salt from crystallizing and adhering to the impeller 3 when the concentrated salt solution evaporates from the impeller 3. The presence of crystallized salt affects the contact between the concentrated salt solution and the impeller 3, thereby deteriorating the evaporation effect. The long-term adhesion of crystallized salt will cause corrosion to the impeller 3.

[0055] Example 3

[0056] Based on the above-mentioned embodiment 1 or 2, this embodiment proposes a super large titanium fan, such as Figure 6 As shown, the speed change component 7 includes a rotating wheel 71, a docking shaft 72, a slider 74, a return spring 75, a linkage rod 76 and a conversion component. The side of the rotating wheel 71 is rotatably connected to the housing 21, and the position of the rotating wheel 71 is supported and controlled by the housing 21. The rotating wheel 71 is fixedly connected to the docking shaft 72 through a guide rod 73. The slider 74 slides on the rod body of the guide rod 73, and the side wall of the guide rod 73 contacts the rotating wheel 71. The docking shaft 72 is elastically connected to the slider 74 through the return spring 75. The side of the slider 74 is hinged to the linkage rod 76 through a pin, and the end of the linkage rod 76 is hinged to the swivel gear 77. The side of the swivel gear 77 is coaxially fixedly connected to the bevel gear 78.

[0057] A transmission member 6 is provided at the center of the rotating wheel 71. The transmission member 6 includes two rotating shafts with gears at their ends. The two rotating shafts are meshed with each other through the end gears. One of the rotating shafts is fixedly installed at the side center of the rotating wheel 71, a gear is fixedly installed in the middle of the coupling 5, and the other rotating shaft is meshed with the middle gear of the coupling 5 through the end gears.

[0058] The conversion part includes a swivel gear 77 and a bevel gear 78. The bevel gear 78 is fixedly mounted on the side of the swivel gear 77. The slotted gear 82 is located on the extension line of the rotating wheel 71. The slotted gear 82 is provided with a bevel gear groove on the side facing the bevel gear 78. The end of the docking shaft 72 is rotatably connected to the slotted gear 82. The diameter of the swivel gear 77 is larger than that of the slotted gear 82.

[0059] The rotation force of the rotating shaft on the coupling 5 is transmitted to the rotating wheel 71 through the transmission member 6, so that the rotating wheel 71 rotates. The faster the impeller 3 rotates, the faster the rotating wheel 71 rotates. The rotating wheel 71 rotates to drive the docking shaft 72 and the guide rod 73 to rotate, and the centrifugal force is applied to the slider 74 on the guide rod 73. The slider 74 changes the position of the conversion member by the linkage rod 76, so that the docking position with the spray member 8 is changed. The conversion member slides on the outer wall of the docking shaft 72 and is meshed with the gear set 88.

[0060] like Figure 4 As shown, the gear set 88 includes two gears and a rotating shaft, one of which is meshed with the slotted gear 82. When the bevel gear 78 is meshed with the slotted gear 82, the swivel gear 77 is misaligned with another gear of the gear set 88; when the swivel gear 77 is meshed with another gear of the gear set 88, the bevel gear 78 is separated from the slotted gear 82. Initially, the bevel gear 78 is butted and meshed with the slotted gear 82, and the rotation of the rotating wheel 71 causes the bevel gear 78 to rotate so that the slotted gear 82 rotates, and the slotted gear 82 drives the injection spiral tube 83 to rotate so that the concentrated salt solution is injected into the housing 21.

[0061] The speed of impeller 3 becomes faster, the heat generated by impeller 3 increases, and the amount of concentrated salt solution that can be evaporated increases. At this time, the centrifugal force on slider 74 increases, and slider 74 moves in the direction away from docking shaft 72. Slider 74 uses linkage rod 76 to pull bevel gear 78 out of slotted gear 82, and swivel gear 77 will mesh with gear set 88. By using the gear ratio of gear set 88, swivel gear 77 and bevel gear 78, the swivel gear 77 is meshed with gear set 88 and then drives the slotted gear 82 to rotate faster than the bevel gear 78 directly meshing with the slotted gear 82 to drive it to rotate, further increasing its speed, increasing the spraying amount of concentrated salt solution according to the speed of impeller 3, improving the evaporation efficiency of concentrated salt solution to avoid doing useless work, and preventing impeller 3 from rotating too fast, the amount of concentrated salt solution it contacts remains unchanged, that is, the amount of heat exchange remains unchanged. The temperature of impeller 3 is too high and thermal deformation will occur.

[0062] In this embodiment, when the rotation speed of the impeller 3 increases, the slider 74 is centrifugally displaced and changes the positions of the swivel gear 77 and the bevel gear 78 through the linkage rod 76, so that the swivel gear 77 is meshed with the gear set 88 and then drives the slotted gear 82. On the basis of the original impeller 3 driving the rotating wheel 71 to rotate and change the rotation speed of the slotted gear 82, the rotation speed of the slotted gear 82 is further increased, thereby increasing the spraying amount of the concentrated salt solution, improving the evaporation efficiency of the concentrated salt solution to avoid doing useless work, and at the same time increasing the amount of concentrated salt solution to improve the cooling effect on the impeller 3.

[0063] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An extra large titanium fan, characterized in that: include: A steel base (1), a motor (4) is fixedly mounted on the top of the steel base (1), the motor (4) is rotatably connected to a coupling (5) via a rotating shaft, and an impeller (3) is fixedly mounted on the end of the coupling (5); The evaporation element (2) comprises a shell (21), an evaporation chamber (22) and a spiral guide groove (23); the evaporation chamber (22) is provided inside the shell (21); the spiral guide groove (23) is fixedly mounted on the inner wall of the evaporation chamber (22); the side of the impeller (3) is rotatably connected to the shell (21) via a rotating shaft; the impeller (3) is located at the center of the evaporation chamber (22); and the spiral axis of the spiral guide groove (23) and the axis of the impeller (3) are located on the same straight line; The speed change component (7) comprises a docking shaft (72), a slider (74), a return spring (75), a linkage rod (76) and a conversion component, wherein the docking shaft (72) is elastically connected to the slider (74) via the return spring (75), the side of the slider (74) is hinged to the linkage rod (76) via a pin, the end of the linkage rod (76) is hinged to a swivel gear (77), and the side of the swivel gear (77) is coaxially fixedly connected to a bevel gear (78); The spraying member (8) comprises a slotted gear (82), an injection spiral tube (83), an injection barrel (84) and a gear set (88); the inner wall of the injection barrel (84) is rotatably connected to the injection spiral tube (83); the end of the injection spiral tube (83) is fixedly connected to the slotted gear (82); the slotted gear (82) is meshingly connected to the gear set (88); and the injection barrel (84) is connected to the housing (21) via a lower pipe (86); The slotted gear (82) is located on the extension line of the conversion member, and the conversion member slides on the outer wall of the docking shaft (72) and is meshingly connected with the gear set (88).

2. The super large titanium fan according to claim 1, characterized in that: The housing (21) adopts a volute-shaped structure, the impeller (3) rotates counterclockwise to face away from the shear wind, the spiral guide groove (23) is a counterclockwise spiral and extends toward the inside of the housing (21), and a concentrated salt solution is arranged inside the injection cylinder (84). The concentrated salt solution contacts the counterclockwise rotating impeller (3) and is centrifugally ejected along the tangential direction of the outer wall of the impeller (3), and the ejected concentrated salt solution flows along the spiral guide groove (23).

3. The super large titanium fan according to claim 1, characterized in that: A recovery box (25) is fixedly mounted at the bottom of the shell (21); the shell (21) is connected to the recovery box (25) via a connecting port (24); the connecting port (24) is located at the spiral end of the spiral guide groove (23); an air outlet (26) is provided at the center of the shell (21); the air outlet (26) is coaxial with the impeller (3).

4. The super large titanium fan according to claim 1, characterized in that: The speed-changing component (7) further comprises a rotating wheel (71), the side of which is rotatably connected to the housing (21), the rotating wheel (71) being fixedly connected to the docking shaft (72) via a guide rod (73), the sliding block (74) sliding on the rod body of the guide rod (73), and the side wall of the guide rod (73) contacting the rotating wheel (71).

5. The super large titanium fan according to claim 4, characterized in that: The conversion member comprises a swivel gear (77) and a bevel gear (78), wherein the bevel gear (78) is fixedly mounted on the side of the swivel gear (77), the slotted gear (82) is located on the extension line of the rotating wheel (71), a bevel gear groove is provided on the side of the slotted gear (82) facing the bevel gear (78), the end of the docking shaft (72) is rotatably connected to the slotted gear (82), and the diameter of the swivel gear (77) is larger than the diameter of the slotted gear (82).

6. The super large titanium fan according to claim 5, characterized in that: The gear set (88) comprises two gears and a rotating shaft, wherein one of the gears is meshed and connected with the slotted gear (82); when the bevel gear (78) is meshed and connected with the slotted gear (82), the swivel gear (77) is misaligned with another gear of the gear set (88); when the swivel gear (77) is meshed with another gear of the gear set (88), the bevel gear (78) is separated from the slotted gear (82).

7. The super large titanium fan according to claim 1, characterized in that: The bottom of the lower connecting pipe (86) is connected to a spray plate (87), the arc surface of the spray plate (87) has the same curvature as the arc surface of the impeller (3) at its location, and the bottom of the spray plate (87) is provided with a middle spray hole and a lateral spray hole, and the middle spray hole and the lateral spray hole are both oriented toward the impeller (3).

8. The super-large titanium fan according to claim 7, characterized in that: A fixing plate (81) is fixedly mounted on the top of the spray plate (87), the injection cylinder (84) is fixedly mounted on the side of the fixing plate (81), a gear in the gear set (88) is rotatably connected to the fixing plate (81) via a rotating shaft, an upper pipe (85) is fixedly mounted on the top of the injection cylinder (84), the upper pipe (85) is connected to a concentrated salt solution tank, and the lower pipe (86) and the upper pipe (85) are respectively located at two ends of the injection cylinder (84).

9. The super-large titanium fan according to claim 8, characterized in that: A transmission member (6) is arranged at the center of the rotating wheel (71), and the transmission member (6) comprises two rotating shafts with gears arranged at their ends, and the two rotating shafts are meshed with each other through the end gears, one of the rotating shafts is fixedly mounted at the center of the side of the rotating wheel (71), a gear is fixedly mounted at the middle of the coupling (5), and the other rotating shaft is meshed with the middle gear of the coupling (5) through the end gears.

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