A centrifugal evaporation device

Abstract

The application provides a centrifugal evaporation device, which comprises a treatment channel and a centrifugal evaporation wheel. The treatment channel comprises an air outlet end and an air inlet end. The centrifugal evaporation wheel is rotatably installed in the treatment channel and is driven to rotate by a motor. The centrifugal evaporation wheel is internally provided with a closed impeller structure, and the outer periphery is provided with a fan blade. The middle part of the impeller structure is provided with a suction port, and the peripheral part is provided with a Venturi nozzle which is communicated with the area where the fan blade is located. When the centrifugal evaporation device provided by the application is started, a suction effect is formed on raw water, a high-pressure fluid is formed on the periphery of the impeller structure, and the acceleration effect of the Venturi nozzle on the water flow is utilized, so that the raw water is sprayed in the form of water mist to the area where the fan blade is located, thereby enabling the airflow formed by the fan blade to evaporate and take away most of the water mist formed by the raw water, realizing sufficient heat absorption and evaporation of the raw water, improving the treatment effect, and the centrifugal evaporation device provided by the application has the advantages of simple structure, low energy consumption and high efficiency.

Description

Technical Field

[0001] This invention relates to a centrifugal evaporation apparatus. Background Technology

[0002] Approximately 30% of mine water in my country is highly salinized, with the proportion exceeding 50% in Northwest China, making it the most prominent problem restricting the development of coal mines in the region. Furthermore, the concentrated wastewater discharged from reverse osmosis desalination systems during the production processes of coal chemical, steel, petrochemical, and thermal power plants contains large amounts of salt. Direct discharge of this high-salinity wastewater would cause serious harm to water bodies and land. Treatment methods for high-salinity wastewater, based on different principles, are mainly divided into heating distillation technology, membrane separation technology, and ion exchange technology. Distillation technologies include multi-stage flash evaporation, multi-effect evaporation, and vapor compression distillation; membrane separation technologies for treating high-salinity wastewater mainly include reverse osmosis and electrodialysis; ion exchange desalination technology is only suitable for treating low-salinity water and is extremely costly for treating high-salinity wastewater, making it unsuitable.

[0003] The biggest problem in treating high-salinity wastewater is the long process flow, high equipment investment, and high operating costs. With the continuous development of high-salinity wastewater treatment technology, some new technologies and methods have emerged, such as centrifugal thin-film evaporation, spray evaporation, gas-liquid contact evaporation concentration technology, cryogenic desalination, forward osmosis, membrane distillation, and solvent extraction. However, existing high-salinity wastewater treatment equipment often suffers from high energy consumption, complex processes and structures, large investments, and difficult maintenance. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this invention proposes a simple centrifugal evaporation structure.

[0005] A centrifugal evaporation apparatus includes a processing channel and a centrifugal evaporation wheel, wherein, The processing channel has an air outlet at one end and an air inlet at the other end.

[0006] The centrifugal evaporator is rotatably installed inside the processing channel and driven by a motor. The centrifugal evaporator has a closed impeller structure inside and fan blades on its outer periphery. The impeller structure has a suction port in the middle, which connects to the raw liquid pipe extending to the outside of the processing channel, and a Venturi nozzle connected to the area where the fan blades are located on its periphery.

[0007] During operation, the centrifugal evaporator rotates, and the middle of the impeller structure creates a negative pressure at the suction port to draw in raw water. Meanwhile, a high pressure is created at the circumference of the impeller structure at the water inlet of the Venturi nozzle, which forces the raw water towards the Venturi nozzle. As a result, the Venturi nozzle sprays water mist into the area where the fan blades are located. At the same time, the fan blades rotate to create airflow in the processing channel. The water in the water mist evaporates under the action of the airflow and is discharged through the air outlet. The unevaporated water in the water mist forms concentrated brine and is discharged through the air inlet, thereby treating the raw water.

[0008] The centrifugal evaporation device provided by this invention features a centrifugal evaporation wheel that creates a suction effect on the raw water during rotation, reducing the need for a water pump or lowering its power. Furthermore, the centrifugal evaporation wheel generates a high-pressure fluid around the impeller structure, and utilizes the acceleration effect of the venturi tube to spray the raw water as a mist onto the area where the fan blades are located. The airflow generated by the fan blades evaporates and carries away most of the water mist, while the unevaporated water forms concentrated brine, which is then discharged. This process is simple yet ingenious, achieving full heat absorption and evaporation of the raw water, thus improving the treatment effect. The centrifugal evaporation device provided by this invention has the advantages of simple structure, low energy consumption, and high efficiency.

[0009] Preferably, to facilitate the discharge of steam and concentrated brine, the end of the processing channel where the centrifugal evaporator is installed is a vertical channel, and the axis of rotation of the centrifugal evaporator is vertical.

[0010] Preferably, the impeller structure includes several blades, one end of which is close to the suction port, and the other end radiates outward and evenly divides the internal space of the centrifugal evaporator.

[0011] Preferably, there are 3 to 6 blades, and the blades are streamlined to reduce vibration and noise.

[0012] Preferably, the periphery of the centrifugal evaporator is a nozzle ring surrounding the blades, the nozzle ring having a thickness of 5-10 mm, and the Venturi nozzle being disposed on the nozzle ring.

[0013] Preferably, the air intake of the Venturi nozzle is located on the side of the centrifugal evaporator facing the air outlet, so that the air drawn in by the Venturi nozzle has a low salt concentration, which can avoid the problem of the Venturi nozzle being blocked.

[0014] Preferably, the inlet diameter of the venturi nozzle is 1mm-3mm, the outlet diameter is 1mm-3mm, and the central throat diameter is 0.1mm-0.2mm.

[0015] Preferably, there are at least two centrifugal evaporation wheels, which are coaxially arranged to form a multi-layered stacked structure, thereby creating a higher processing capacity. Theoretically, having N centrifugal evaporation wheels results in N times the evaporation capacity.

[0016] Preferably, the motor is located outside the processing channel, and the rotating shaft extends into the processing channel and drives the centrifugal evaporator wheel to rotate.

[0017] Preferably, the air outlet of the processing channel is connected to a discharge pipe, and a condenser is provided outside the discharge pipe to condense the steam obtained from the processing. The outlet of the discharge pipe forms a condensate outlet and a non-condensable gas outlet.

[0018] Preferably, the raw liquid pipe is equipped with a suction pump, which can supply raw water to the centrifugal evaporation wheel when the centrifugal evaporation device is started, thereby enabling the centrifugal evaporation wheel to quickly form a suction effect and enter the working state more quickly. After the centrifugal evaporation wheel has formed a stable suction effect on the raw water, the suction pump can be turned off. Alternatively, the water level in the raw water tank is higher than that of the centrifugal evaporation wheel, and the weight of the water can be used to automatically transport the water to the centrifugal evaporation wheel.

[0019] Preferably, the centrifugal evaporation device further includes a raw water tank, and the inlet of the raw liquid pipe is connected to the raw water tank.

[0020] Preferably, the suction port extends along the axial direction of the centrifugal evaporator to form a suction tube, and the suction tube is connected to the original liquid tube through a rotating joint to prevent the original liquid tube from rotating and twisting, and also to prevent water leakage at the connection point.

[0021] Preferably, the suction port, suction tube, or raw liquid tube is equipped with a check valve to prevent the raw water from flowing back.

[0022] Preferably, the air outlet of the processing channel is connected to a discharge pipe, and the middle part of the discharge channel is immersed in the raw water tank, so that the heat of the steam can be transferred to the raw water, forming heat recovery, further reducing energy consumption and improving processing efficiency.

[0023] Preferably, the raw liquid pipe or raw water tank is equipped with a heater to heat the raw liquid to 15℃-40℃, which can improve the separation effect.

[0024] Preferably, the centrifugal evaporation device further includes a concentrate tank, which is connected to the air inlet of the processing channel or located directly below the air inlet of the processing channel to collect concentrated brine.

[0025] As can be seen from the above description of the present invention, the present invention has the following beneficial effects: The centrifugal evaporation device provided by this invention features a centrifugal evaporation wheel that creates a suction effect on the raw water during rotation, reducing the need for a water pump or lowering the power of the pump. Furthermore, the centrifugal evaporation wheel generates a high-pressure fluid around the impeller structure, and utilizes the acceleration effect of the venturi tube to spray the raw water as a mist onto the area where the fan blades are located. This allows the airflow generated by the fan blades to evaporate and carry away most of the water mist, while the unevaporated water forms concentrated brine, thus treating the raw water. The process is simple yet ingenious, achieving full heat absorption and evaporation of the raw water, improving the treatment effect. The centrifugal evaporation device provided by this invention has the advantages of simple structure, low energy consumption, and high efficiency. The centrifugal evaporation wheels are at least two in number and are coaxially arranged to form a multi-layered stacked structure, thereby creating a higher processing capacity. The raw liquid pipe is equipped with a suction pump, which can provide raw water to the centrifugal evaporation wheel when the centrifugal evaporation device is started, so that the centrifugal evaporation wheel can quickly form a suction effect and enter the working state more quickly. The air outlet of the processing channel is connected to a discharge pipe, and the middle part of the discharge channel is submerged in the raw water tank, so that the heat of the steam can be transferred to the raw water, forming heat recovery, further reducing energy consumption and improving processing efficiency. Attached Figure Description

[0026] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0027] in: Figure 1 This is a schematic diagram of a centrifugal evaporation device; Figure 2 This is the shaft side view of the centrifugal evaporator. Figure 1 ; Figure 3 This is the shaft side view of the centrifugal evaporator. Figure 2 (Hidden top cover, revealing the enclosed impeller structure) Figure 4 This is a cross-sectional view of a centrifugal evaporator. Figure 5 It is about Figure 4 A magnified view of a portion at point A; Figures 1 to 5The markings are as follows: Processing channel 1, Air outlet 11, Air inlet 12, Discharge pipe 13, Condensate outlet 131, Non-condensable gas outlet 132, Condenser 133, Centrifugal evaporator 2, Fan blade 21, Suction port 22, Suction pipe 221, Rotary joint 222, Raw liquid pipe 23, Nozzle ring 24, Venturi nozzle 241, Blade 25, Motor 3, Raw water tank 4, Concentrate tank 5. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects of this invention clearer and more understandable, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Example 1:

[0029] Please see Figures 1 to 5 A centrifugal evaporation apparatus is provided, comprising a processing channel 1 and a centrifugal evaporation wheel 2, wherein... The processing channel 1 is located inside the housing, with one end being an air outlet 11 and the other end being an air inlet 12. In one embodiment, the air outlet 11 of the processing channel 1 is connected to a discharge pipe 13, and a condenser 133 is provided outside the discharge pipe 13 to condense the processed steam. The outlet of the discharge pipe 13 forms a condensate outlet 131 and a non-condensable gas outlet 132.

[0030] The centrifugal evaporator 2 is rotatably mounted inside the processing channel 1 and driven to rotate by a motor 3. In this embodiment, the motor 3 is located outside the processing channel 1, and its shaft extends into the processing channel 1 and drives the centrifugal evaporator 2 to rotate. In other embodiments, there are multiple centrifugal evaporators 2, which are coaxially arranged to form a multi-layered stacked structure, thereby achieving a higher processing capacity. For example, if two centrifugal evaporators 2 are used, the equipment has twice the evaporation capacity, thus significantly improving processing efficiency.

[0031] The centrifugal evaporator 2 has a closed impeller structure inside and a fan blade 21 on its outer periphery. A suction port 22 is located in the middle of the impeller structure and connects to a raw liquid pipe 23 extending to the outside of the processing channel 1. In one embodiment, the suction port 22 extends axially along the centrifugal evaporator 2 to form a suction pipe 221. The suction pipe 221 connects to the raw liquid pipe 23 via a rotating joint 222, preventing the raw liquid pipe 23 from rotating and twisting, and also preventing leakage at the connection point. In other embodiments, a check valve is provided inside the suction port 22, the suction pipe 221, or the raw liquid pipe 23 to prevent backflow of raw water.

[0032] Based on the above embodiments, the raw liquid pipe 23 is equipped with a suction pump, which can provide raw water to the centrifugal evaporation wheel 2 when the centrifugal evaporation device is started, so that the centrifugal evaporation wheel 2 can quickly form a suction effect and enter the working state more quickly. After the centrifugal evaporation wheel 2 forms a stable suction effect on the raw water, the suction pump can also be turned off.

[0033] The impeller structure is provided with a Venturi nozzle 241 in the area where the ventilation blade 21 is located.

[0034] In one embodiment, the impeller structure includes several blades 25, one end of which is close to the suction port 22, and the other end radiates outward, uniformly dividing the internal space of the centrifugal evaporator 2. Preferably, there are 3 to 6 blades 25, and the blades 25 are streamlined to reduce vibration and noise.

[0035] In another embodiment, the periphery of the centrifugal evaporator 2 is a nozzle ring 24 surrounding the blades 25, the nozzle ring 24 having a thickness of 5-10 mm, and the Venturi nozzle 241 being disposed on the nozzle ring 24. Preferably, the inlet diameter of the Venturi nozzle 241 is 1 mm-3 mm, the outlet diameter is 1 mm-3 mm, and the diameter of the central throat is 0.1 mm-0.2 mm. Furthermore, in other embodiments, the air intake of the Venturi nozzle 241 is disposed on the side of the centrifugal evaporator 2 facing the air outlet 11, thereby ensuring a low salt concentration in the air drawn by the Venturi nozzle 241 and preventing clogging of the Venturi nozzle 241.

[0036] Based on the above embodiments, the centrifugal evaporation device further includes a raw water tank 4, and the inlet of the raw liquid pipe 23 is connected to the raw water tank 4. Preferably, the raw liquid pipe 23 or the raw water tank 4 is equipped with a heater to heat the raw liquid to 15℃-40℃, which can improve the separation effect. In specific implementation scenarios, the heater can utilize low-grade heat sources, including water source heat pumps, circulating cooling water, solar-heated water, and other low-grade heat sources. Compared with existing multi-effect evaporation, multi-stage flash evaporation, and vapor compression distillation, it has significant advantages in terms of pretreatment and heat requirements, and has low operating costs.

[0037] In addition, the air outlet 11 of the processing channel 1 is connected to the discharge pipe 13, and the middle part of the discharge channel is immersed in the raw water tank 4, so that the heat of the steam can be transferred to the raw water, forming heat recovery, further reducing energy consumption and improving processing efficiency.

[0038] Based on the above embodiments, the centrifugal evaporation device further includes a concentrated water tank 5, which is connected to the air inlet 12 of the processing channel 1 or is located directly below the air inlet 12 of the processing channel 1 to collect concentrated brine.

[0039] During operation, the centrifugal evaporator 2 rotates, creating a negative pressure at the suction port 22 in the middle of the impeller structure, which can draw in raw water, similar to the impeller structure of a water pump. Meanwhile, a high pressure is created at the circumference of the impeller structure at the water inlet of the Venturi nozzle 241, squeezing the raw water towards the nozzle. This causes the nozzle to spray water mist into the area where the fan blade 21 is located. Simultaneously, the fan blade 21 rotates, creating airflow within the processing channel 1. The water in the mist evaporates under the influence of the airflow and is discharged through the outlet 11, while the unevaporated water forms concentrated brine and is discharged through the inlet 12. In one embodiment, to facilitate the discharge of steam and concentrated brine, the end of the processing channel 1 where the centrifugal evaporator 2 is installed is a vertical channel, and the axis of rotation of the centrifugal evaporator 2 is vertical.

[0040] The centrifugal evaporation device provided by this invention features a centrifugal evaporation wheel 2 that, during rotation, creates a suction effect on the raw water, reducing the need for a water pump or lowering its power. Furthermore, the centrifugal evaporation wheel 2 generates a high-pressure fluid around the impeller structure, and utilizes the acceleration effect of the venturi tube to spray the raw water as a mist onto the area where the fan blade 21 is located. This allows the airflow generated by the fan blade 21 to evaporate and carry away most of the water mist, while the unevaporated water forms concentrated brine, thus treating the raw water. The process is simple yet ingenious, achieving full heat absorption and evaporation of the raw water, improving the treatment effect. The centrifugal evaporation device provided by this invention has the advantages of simple structure, low energy consumption, and high efficiency. Example 2:

[0041] Based on Example 1, a centrifugal evaporator 2 with a diameter of 125 mm is selected, with 5 blades 25 evenly distributed, a nozzle ring 24 with a thickness of 8 mm, and Venturi nozzles 241 evenly distributed on the nozzle ring 24. The Venturi nozzles 241 have the following dimensions: inlet diameter of 3 mm, outlet diameter of 2 mm, and central throat diameter of 0.2 mm.

[0042] In this embodiment, the water temperature is 26℃, the average daily dry-bulb temperature of the environment is 28℃, the average humidity is 74%, the raw water salinity is 8g / L, the speed of the power motor is 1490n / min, and the evaporation rate is 6 (L / h). Example 3:

[0043] Based on Example 1, a centrifugal evaporator wheel 2 with a diameter of 140 mm and 6 blades 25 evenly distributed is selected. The nozzle ring 24 with a thickness of 10 mm is selected. Venturi nozzles 241 are evenly distributed on the nozzle ring 24. The dimensions of the Venturi nozzles 241 are: inlet diameter of 2 mm, outlet diameter of 2 mm, and central throat diameter of 0.15 mm.

[0044] In this embodiment, the water temperature is 35℃, the average daily dry-bulb temperature of the environment is 28℃, the average humidity is 78%, the raw water salinity is 8g / L, the speed of the power motor is 1490n / min, and the evaporation rate is 10.6 (L / h). Example 4:

[0045] Based on Example 1, a centrifugal evaporator wheel 2 with a diameter of 140 mm and 6 blades 25 evenly distributed is selected. The nozzle ring 24 with a thickness of 10 mm is selected. Venturi nozzles 241 are evenly distributed on the nozzle ring 24. The dimensions of the Venturi nozzles 241 are: inlet diameter of 2 mm, outlet diameter of 2 mm, and central throat diameter of 0.15 mm.

[0046] In this embodiment, the water temperature is 38℃, the average daily dry-bulb temperature of the environment is 28℃, the average humidity is 78%, the raw water salinity is 8g / L, the speed of the power motor is 2950n / min, and the evaporation rate is 22.5 (L / h). Example 5:

[0047] Based on Example 1, a centrifugal evaporator wheel 2 with a diameter of 250 mm and 6 blades 25 evenly distributed is selected. The nozzle ring 24 with a thickness of 10 mm is selected. Venturi nozzles 241 are evenly distributed on the nozzle ring 24. The Venturi nozzles 241 have the following dimensions: inlet diameter of 2 mm, outlet diameter of 2 mm, and central throat diameter of 0.15 mm.

[0048] In this embodiment, the water temperature is 40℃, the average daily dry-bulb temperature of the environment is 28.5℃, the average humidity is 78%, the raw water salinity is 8g / L, the speed of the power motor is 2950n / min, and the evaporation rate is 31.4 (L / h). Example 6:

[0049] Based on Example 1, a centrifugal evaporator wheel 2 with a diameter of 250 mm and 6 blades 25 evenly distributed is selected. The nozzle ring 24 with a thickness of 10 mm is selected. Venturi nozzles 241 are evenly distributed on the nozzle ring 24. The dimensions of the Venturi nozzles 241 are: inlet diameter of 2 mm, outlet diameter of 2 mm, and central throat diameter of 0.15 mm.

[0050] The average daily dry-bulb temperature of the environment is 30.5 ℃, the average humidity is 75%, the raw water salinity is 10 g / L, the speed of the power motor is 2950 n / min, and the evaporation rate is 21.5 (L / h). Example 7:

[0051] Based on Example 1, a centrifugal evaporator wheel 2 with a diameter of 250 mm and 6 blades 25 evenly distributed is selected. The nozzle ring 24 with a thickness of 10 mm is selected. Venturi nozzles 241 are evenly distributed on the nozzle ring 24. The dimensions of the Venturi nozzles 241 are: inlet diameter of 2 mm, outlet diameter of 2 mm, and central throat diameter of 0.15 mm.

[0052] In this embodiment, the raw water is concentrated brine produced by a high-salt mine water reverse osmosis system, with a salt content of 6% (60000mg / L), a water temperature of 38℃, an average daily dry-bulb temperature of 28.5℃, an average humidity of 78%, a motor speed of 2950n / min, and an evaporation rate of 28.9 (L / h).

[0053] The centrifugal evaporation devices provided in the above embodiments all operated for 12 hours and had a high evaporation rate. No corrosion or scaling was found in the nozzle ring 24. It can be seen that the centrifugal evaporation process used in the centrifugal evaporation device provided by the present invention has strong stability for treating high-salt wastewater. It does not require a large amount of heat energy and can utilize low-quality heat sources. The equipment is simple to operate and occupies a small area. It has great advantages over multi-effect evaporation, multi-stage flash evaporation and reverse osmosis.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A centrifugal evaporation apparatus, characterized in that, Includes processing channels and centrifugal evaporation wheels; The processing channel has an air outlet at one end and an air inlet at the other end. The centrifugal evaporator is rotatably installed in the processing channel and driven by a motor; the centrifugal evaporator has a closed impeller structure inside and a fan blade on the outer periphery; the impeller structure has a suction port in the middle and connects to the raw liquid pipe extending to the outside of the processing channel, and a Venturi nozzle connected to the area where the fan blade is located on the periphery; the suction port of the Venturi nozzle is located on the side of the centrifugal evaporator facing the air outlet. The impeller structure includes several blades, one end of which is close to the suction port, and the other end radiates outward, evenly dividing the internal space of the centrifugal evaporator. The periphery of the centrifugal evaporator is a nozzle ring surrounding the blades, the nozzle ring having a thickness of 5-10 mm, and a Venturi nozzle being disposed on the nozzle ring. The Venturi nozzle has an inlet diameter of 1 mm-3 mm, an outlet diameter of 1 mm-3 mm, and a central throat diameter of 0.1 mm-0.2 mm. The centrifugal evaporation device further includes a raw water tank, and the inlet of the raw liquid pipe is connected to the raw water tank; the raw liquid pipe is equipped with a suction pump, or the water level in the raw water tank is higher than that of the centrifugal evaporation wheel; the centrifugal evaporation device further includes a concentrate tank, which is connected to the air inlet of the treatment channel, or is located directly below the air inlet of the treatment channel; the suction port extends along the axial direction of the centrifugal evaporation wheel to form a suction pipe, and the suction pipe is connected to the raw liquid pipe through a swivel joint; a check valve is provided inside the suction port, suction pipe, or raw liquid pipe; The centrifugal evaporator rotates, and the middle part of the impeller structure forms a suction negative pressure against the suction port, while the periphery of the impeller structure forms a high pressure against the water inlet end of the Venturi nozzle, squeezing the raw water towards the Venturi nozzle. The Venturi nozzle sprays water mist into the area where the fan blades are located. The fan blades rotate to form an airflow in the processing channel. The water in the water mist evaporates under the action of the airflow and is discharged through the air outlet. The water that does not evaporate in the water mist forms concentrated brine and is discharged through the air inlet.

2. The centrifugal evaporation apparatus according to claim 1, characterized in that, The processing channel is located at a vertical end where the centrifugal evaporator is installed, and the axis of rotation of the centrifugal evaporator is vertical.

3. The centrifugal evaporation apparatus according to claim 1, characterized in that, There are 3 to 6 blades, and the blades are streamlined.

4. The centrifugal evaporation apparatus according to claim 1, characterized in that, The centrifugal evaporation wheels are at least two in number and are coaxially arranged to form a multi-layered stacked structure.

5. A centrifugal evaporation apparatus according to claim 1, characterized in that, The motor is located outside the processing channel, and its shaft extends into the processing channel and drives the centrifugal evaporator wheel to rotate.

6. A centrifugal evaporation apparatus according to claim 1, characterized in that, The air outlet of the processing channel is connected to a discharge pipe; a condenser is provided outside the discharge pipe, and the outlet of the discharge pipe forms a condensate outlet and a non-condensable gas outlet, and the middle part of the discharge pipe is submerged in the raw water tank.

7. A centrifugal evaporation apparatus according to claim 1, characterized in that, The raw liquid pipe or raw water tank is equipped with a heater, which heats the raw liquid to 15℃-40℃.

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