Modular rotary evaporator for water quality detection

Abstract

The utility model discloses a kind of modularization rotary evaporator for water quality detection, including horizontal movement, lifting, rotation, heating water bath, condensation and vacuumizing module.Horizontal movement component is accurately positioned by horizontal lead screw and sliding table, lifting component is adjusted height by vertical lead screw;Rotary seat is driven to evaporating flask stable rotation by synchronous belt, angle adjustable;Heating water bath component integrates temperature control and liquid level alarm, condensation component uses multiple groups of axial condensing pipe layered design to improve recovery rate.Each module bolt connection, adapt to the concentration of volatile substance in water quality sample pretreatment, recovery demand, solve the problem such as low precision, insufficient efficiency of traditional equipment.

Description

Technical Field

[0001] This utility model relates to the field of environmental testing technology, and in particular to a modular rotary evaporator for water quality testing. Background Technology

[0002] In the field of water quality environmental testing, sample pretreatment is a crucial step in ensuring the accuracy of test results. The concentration, separation, and recovery of volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), and some heavy metal ions in water samples typically require a rotary evaporator. A rotary evaporator increases the surface area of ​​the material by rotating the evaporation flask, controls the temperature through water bath heating, lowers the boiling point of the solvent through vacuum, and recovers the solvent using a condensation system, ultimately obtaining a concentrated sample.

[0003] However, existing rotary evaporators still have the following shortcomings in water quality testing scenarios: 1. Insufficient motion control precision: The horizontal movement and lifting adjustment of traditional rotary evaporators mostly rely on manual operation or simple single-axis transmission mechanisms, making it difficult to achieve precise positioning of the evaporation flask (such as rapid centering of water sample bottles of different sizes). Furthermore, mechanical clearances during adjustment can easily cause positional shifts, affecting subsequent condensation recovery efficiency. 2. Poor rotational stability and adaptability: The rotation drive of the evaporation flask often uses a single motor directly connected, resulting in large speed fluctuations. It is also impossible to adjust the rotational torque according to the sample viscosity, which may lead to sample splashing or uneven evaporation. Additionally, the lack of angle adjustment function makes it difficult to adapt to condensation systems of different heights or evaporation flasks with special shapes. 3. Low condensation recovery efficiency: Traditional condensation components are mostly single-group serpentine condenser tubes with limited condensation area, resulting in insufficient condensation recovery rate for low-concentration volatile substances, easily causing sample loss and affecting the accuracy of test results. Furthermore, the condenser tubes are mostly fixed structures, requiring complete disassembly for cleaning and maintenance, making the operation cumbersome. 4. Low level of modularity and intelligence: The horizontal movement, lifting, rotation, heating and vacuum control modules of the existing equipment are mostly independently designed, with poor coordination between components (such as the inability to link and adjust the heating temperature and vacuum degree), and lack of status monitoring functions (such as no alarm when the water bath level is too low or the condensation pressure is abnormal), making it difficult to meet the "efficient, accurate and stable" pretreatment requirements in water quality testing.

[0004] Therefore, there is an urgent need to design a modular rotary evaporator optimized for water quality testing scenarios, and to solve the above-mentioned technical problems through structural innovation and functional integration. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a modular rotary evaporator for water quality testing.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a modular rotary evaporator for water quality testing, comprising a horizontal moving component, a lifting component, a rotating base, a heating water bath component, a condensing component, and a vacuum module. The horizontal moving component is bolted to the vertical base of the lifting component via a horizontal slide. The rotating base is fixedly connected to the side of the vertical slide of the lifting component via an angle adjustment bracket. An evaporation flask is rotatably connected below the rotating base, and the bottom of the evaporation flask contacts the water bath of the heating water bath component. A steam connector is fixedly connected inside the rotating base, and the steam connector is connected to the steam inlet end of the condensing component via a high-temperature resistant hose. A vacuum connector is provided on the top of the condensing component, and the vacuum connector is connected to the vacuum module to reduce system pressure.

[0007] As a preferred embodiment of this utility model, the horizontal moving assembly includes two parallel horizontal guide rails, a horizontal lead screw connected to the horizontal guide rails, a horizontal drive motor that drives the horizontal lead screw to rotate, a horizontal slide table slidably disposed on the horizontal guide rails, and a horizontal base that fixes the horizontal guide rails and the horizontal lead screw; both ends of the horizontal lead screw are fixedly connected to the horizontal base through bearing seats, and the output shaft of the horizontal drive motor is connected to one end of the horizontal lead screw through a coupling; the bottom of the horizontal slide table is provided with a horizontal slider that cooperates with the horizontal guide rails, and the top is bolted to the vertical base.

[0008] As a preferred embodiment of this utility model, the lifting assembly includes two parallel vertical guide rails, a vertical lead screw connected to the vertical guide rails, a vertical drive motor for driving the vertical lead screw to rotate, a vertical slide table slidably mounted on the vertical guide rails, and a vertical base for fixing the vertical guide rails and the vertical lead screw; both ends of the vertical lead screw are fixedly connected to the vertical base via bearing seats, and the output shaft of the vertical drive motor is connected to one end of the vertical lead screw via a vertical coupling; the bottom of the vertical slide table is provided with a vertical slider that cooperates with the vertical guide rails, and its side is bolted to the angle adjustment bracket; the bottom of the vertical base is bolted to the horizontal slide table.

[0009] As a preferred embodiment of this utility model, the rotating seat includes a rotating fixing plate bolted to the angle adjusting bracket, deep groove ball bearing seats symmetrically arranged on both sides of the bottom of the rotating fixing plate, a rotating drive motor fixed to the top of the rotating fixing plate, a rotating joint rotatably disposed in the deep groove ball bearing seats, and a synchronous belt connecting the rotating drive motor and the rotating joint; the bottom of the rotating joint is sealed to the upper opening of the evaporation flask through a flange, and the top is connected to the bottom of the steam connector through a rotating sealing bearing; the output shaft of the rotating drive motor is provided with a driving synchronous pulley, and the outer periphery of the rotating joint is provided with a driven synchronous pulley, the driving synchronous pulley being drivenly connected to the driven synchronous pulley through a synchronous belt; a connector fixing seat is fixedly connected to the upper part of the rotating fixing plate by bolts, and the steam connector is sealed and fixed to the connector fixing seat by an O-ring.

[0010] As a preferred embodiment of this utility model, the heating water bath assembly includes a water bath, a heating tube embedded in the bottom of the water bath, a temperature controller electrically connected to the heating tube, and a liquid level sensor disposed on the side of the water bath; the top opening of the water bath contacts the bottom of the evaporation flask to support the evaporation flask; the heating tubes are evenly distributed at the bottom of the water bath; the temperature controller is used to set the heating temperature and display the water temperature in real time; the liquid level sensor is electrically connected to the temperature controller and triggers an alarm when the liquid level in the water bath is lower than the set value.

[0011] As a preferred embodiment of this utility model, the condensation assembly includes a vertical condensation tower, a steam inlet pipe communicating with the lower side of the condensation tower, a discharge port located at the bottom of the condensation tower, a heat insulation plate separating the internal space of the condensation tower, and a condensation unit installed above the heat insulation plate and a collection unit installed below it; one end of the steam inlet pipe is connected to the high-temperature resistant hose, and the other end extends into the condensation tower; the heat insulation plate has through holes for steam to pass through; the condensation unit includes multiple sets of condensing tubes arranged along the axial direction of the condensation tower, with both ends of the condensing tubes connected to the refrigerant outlet and refrigerant inlet of the refrigeration unit, respectively; the collection unit includes a liquid outlet pipe communicating with the discharge port, and a drain valve installed on the liquid outlet pipe; a pressure sensor is installed on the steam inlet pipe for monitoring the system vacuum.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The horizontal moving component adopts a transmission structure of "horizontal guide rail + horizontal lead screw + horizontal drive motor". Combined with the precise guidance of the horizontal slide, it can achieve millimeter-level positioning of the horizontal position of the evaporation bottle. With the lifting component's structure of "vertical guide rail + vertical lead screw + vertical drive motor", it can quickly complete the centering adjustment of water sample bottles of different heights and sizes, solving the problems of low precision and easy deviation of traditional equipment manual adjustment. 2. The rotating stand is driven by a "rotary drive motor + synchronous belt + rotary joint". The motor output torque is transmitted to the rotary joint via the synchronous belt, avoiding torque fluctuations from direct connection and ensuring stable rotation speed of the evaporation flask. At the same time, the angle adjustment bracket can flexibly adjust the tilt angle of the evaporation flask to adapt to condenser towers of different heights or irregularly shaped containers, further improving evaporation uniformity and reducing sample splashing. 3. The condensation assembly adopts a layered design of "vertical condensation tower + heat insulation plate + condensation unit + collection unit": the heat insulation plate divides the interior of the condensation tower into the upper condensation unit and the lower collection unit to avoid secondary evaporation of condensate; multiple sets of condensation tubes significantly increase the condensation area, and together with the stable refrigerant provided by the refrigeration unit, significantly improve the condensation recovery rate, effectively reduce sample loss, and ensure the accuracy of detection. 4. The horizontal movement, lifting, rotation, heating water bath, and condensation components are connected by bolts or flange seals to form standardized modules. Each module can be disassembled and maintained independently, reducing equipment maintenance costs. The heating water bath component has a built-in temperature controller and liquid level sensor. When the water bath temperature deviates from the set value or the liquid level is too low, an audible and visual alarm is triggered to prevent dry burning. The steam inlet pipe of the condensation component is equipped with a pressure sensor, which can provide real-time feedback on the system vacuum level. Together with the vacuum module, it can achieve linkage control of "temperature-vacuum-speed", further improving evaporation efficiency and stability. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 This is a top view of the present invention; Figure 4 This is a side view of the present invention; Figure 5 This is a cross-sectional structural schematic diagram of the present invention; In the diagram: 1. Horizontal moving assembly; 2. Lifting assembly; 3. Rotary seat; 4. Heating water bath assembly; 5. Condensation assembly; 6. Evaporation flask; 7. Steam connector; 8. Vacuum module; 11. Horizontal guide rail; 12. Horizontal lead screw; 13. Horizontal drive motor; 14. Horizontal slide table; 15. Horizontal slider; 16. Horizontal base; 21. Vertical guide rail; 22. Vertical lead screw; 23. Vertical drive motor; 24. Vertical slide table; 25. Vertical coupling; 26. Vertical base; 27. Vertical slider; 31. Rotary fixing plate; 32. Deep groove ball bearing seat; 33. Rotary drive motor; 34. Rotary joint 35. Synchronous belt; 36. Connector mounting base; 41. Water bath; 42. Temperature controller; 43. Heating tube; 44. Liquid level sensor; 51. Condensing tower; 52. Steam inlet pipe; 53. Discharge port; 54. Heat insulation plate; 55. Condensing unit; 56. Collection unit; 57. Refrigeration unit; 58. Pressure sensor; 71. Hoses; 72. O-rings; 241. Angle adjustment bracket; 331. Driving synchronous pulley; 341. Driven synchronous pulley; 501. Vacuum connector; 551. Condensing tube; 561. Liquid outlet pipe; 562. Drain valve; 571. Refrigerant outlet; 572. Refrigerant inlet. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0015] In the attached diagram, all identical reference numerals refer to the same components.

[0016] Example 1: Basic Positioning and Evaporation Function like Figure 1-5 As shown, this utility model provides a modular rotary evaporator for water quality testing. This embodiment is the basic configuration of this utility model, focusing on demonstrating the coordinated operation of the horizontal movement, lifting and rotating components.

[0017] The horizontal moving assembly 1 includes two parallel horizontal guide rails 11, which are fixed to a horizontal base 16. A horizontal lead screw 12 is connected to both ends of the horizontal base 16 via bearing seats. The output shaft of the horizontal drive motor 13 is driven to one end of the horizontal lead screw 12 via a coupling, driving the horizontal lead screw 12 to rotate. The horizontal slider 15 at the bottom of the horizontal slide table 14 slides in cooperation with the horizontal guide rails 11, and the top is fixedly connected to the vertical base 26 of the lifting assembly 2 by bolts.

[0018] The vertical guide rail 21 of the lifting assembly 2 is fixed parallel to the vertical base 26. The vertical lead screw 22 is connected to both ends of the vertical base 26 through a bearing seat. The output shaft of the vertical drive motor 23 is driven by one end of the vertical lead screw 22 through the vertical coupling 25. The vertical slider 27 at the bottom of the vertical slide table 24 is in sliding engagement with the vertical guide rail 21. The side bolt angle adjustment bracket 241 is used to connect the rotating seat 3.

[0019] Please see Figure 2 , Figure 3 , Figure 4 The rotating base 3's rotating fixing plate 31 is bolted to the angle adjusting bracket 241; deep groove ball bearing seats 32 are symmetrically arranged on both sides of the bottom of the rotating fixing plate 31, and the rotary joint 34 is rotatably installed inside the deep groove ball bearing seats 32. The rotary drive motor 33 is fixed to the top of the rotating fixing plate 31, and its output shaft is equipped with a driving synchronous pulley 331; the rotary joint 34 is equipped with a driven synchronous pulley 341 on its outer periphery, and the driven synchronous pulley 341 is fixed to the outer periphery of the rotary joint 34, and the two are connected by a synchronous belt 35. The bottom of the rotary joint 34 is sealed to the upper opening of the evaporating bottle 6 through a flange, and the top is connected to the bottom of the steam connector 7 through a rotary sealing bearing; the steam connector 7 is fixed to the connector fixing seat 36 on the upper part of the rotating fixing plate 31 by an O-ring 72.

[0020] Please see Figure 3 The top opening of the water bath 41 of the heating water bath assembly 4 supports the bottom of the evaporation flask 6, and the bottom of the flask is fitted with a heating tube 43. The temperature controller 42 is electrically connected to the heating tube 43 to control the water temperature. The liquid level sensor 44 is located on the side of the water bath 41 and is electrically connected to the temperature controller 42. When the liquid level is too low, an alarm is triggered.

[0021] Please see Figure 5 The lower side of the vertical condenser tower 51 of the condensing assembly 5 is connected to a steam inlet pipe 52 (one end of which is connected to a high-temperature resistant hose 71), and a discharge port 53 is provided at the bottom. Internally, it is divided by a heat insulation plate 54 into an upper condensing unit 55 (multiple sets of axially arranged condensing pipes 551, with both ends connected to the refrigerant outlet 571 and inlet 572 of the refrigeration unit 57) and a lower collecting unit 56 (the liquid outlet pipe 561 is equipped with a drain valve 562). A pressure sensor 58 is installed on the steam inlet pipe 52 to monitor the system vacuum level.

[0022] During operation, the horizontal drive motor 13 drives the horizontal lead screw 12 to rotate, and the horizontal slide table 14 moves along the horizontal guide rail 11, thereby positioning the vertical base 26 horizontally. The vertical drive motor 23 drives the vertical lead screw 22 to rotate, and the vertical slide table 24 moves along the vertical guide rail 21, adjusting the height of the evaporation flask 6. The rotary drive motor 33 drives the rotary joint 34 to rotate via the synchronous belt 35, and the evaporation flask 6 rotates synchronously to increase the evaporation area. The heating water bath assembly 4 heats the evaporation flask 6 to the set temperature, and the solvent in the evaporation flask 6 evaporates into steam, which enters the steam inlet pipe 52 of the condensation assembly 5 through the steam connector 7 and the high-temperature resistant hose 71. After condensation by multiple sets of condenser pipes 551, the steam flows into the collection unit 56. The vacuum module 8 reduces the system pressure through the vacuum connector 501, thereby improving the evaporation efficiency.

[0023] Example 2: Angle Adjustment and Adaptation to Irregularly Shaped Containers This embodiment focuses on demonstrating the angle adjustment function of the rotating base 3, which can be adapted to evaporation flasks of different heights or shapes.

[0024] Angle adjustment bracket 241 is bolted to the side of the vertical slide table 24. Its connection end with the rotating fixing plate 31 has an arc-shaped slot (part number not marked). The angle of the rotating fixing plate 31 is adjusted (0-45° range) by inserting the bolt into the slot. When the evaporating flask 6 is a tall, narrow-necked flask, the bolts of the angle adjustment bracket 241 are loosened, and the tilt angle of the rotating fixing plate 31 is adjusted so that the bottom of the evaporating flask 6 contacts the water bath 41, while the height of the flask opening aligns with the steam inlet pipe 52 of the condensing assembly 5. After fixing, the rotary drive motor 33 drives the rotary joint 34 to rotate via the synchronous belt 35, and the evaporating flask 6 rotates at a set angle and speed, avoiding stability issues caused by the center of gravity shift in tall flasks.

[0025] At this time, the temperature controller 42 of the heating water bath assembly 4 adjusts the heating power according to the characteristics of the sample in the evaporation flask 6 (such as a high-salinity water sample), and the liquid level sensor 44 monitors the liquid level of the water bath 41 in real time to prevent the liquid level from being too low due to evaporation; the condensation efficiency of the multiple condenser tubes 551 of the condensation assembly 5 is further improved due to the optimization of the steam path after the angle adjustment, ensuring that volatile substances are fully recovered.

[0026] Example 3: Multi-module collaboration and intelligent monitoring This embodiment focuses on demonstrating the collaborative work and status monitoring functions of each module.

[0027] After the horizontal sliding table 14 of the horizontal moving assembly 1 moves to the designated position, it is locked in place by bolts; the vertical sliding table 24 of the lifting assembly 2 rises to the preset height, and the angle adjusting bracket 241 adjusts the rotating seat 3 to a horizontal state, so that the bottom of the evaporation bottle 6 contacts the water bath 41. The heating tube 43 of the heating water bath assembly 4 is activated, the temperature controller 42 displays that the water temperature has risen to 50℃ (set value), and the liquid level sensor 44 detects that the liquid level in the water bath 41 is normal (above the minimum threshold).

[0028] The rotary drive motor 33 of the rotating seat 3 starts, and drives the rotary joint 34 to rotate through the synchronous belt 35. The evaporation bottle 6 rotates at a constant speed of 200 rpm. The steam generated by evaporation enters the steam inlet pipe 52 of the condensing component 5 through the steam joint 7 and the high-temperature resistant hose 71. The pressure sensor 58 detects that the steam pressure is -80 kPa (the vacuum module 8 is working continuously). The steam is condensed into liquid through multiple sets of condensing pipes 551 (the refrigerator 57 provides -10℃ refrigerant) and flows into the liquid outlet pipe 561 of the collection unit 56. After the drain valve 562 is opened, the liquid is collected into the receiving bottle.

[0029] If the liquid level in the water bath 41 drops below the set threshold due to evaporation, the liquid level sensor 44 triggers an alarm (audio-visual prompt) on the temperature controller 42, reminding the operator to add water bath medium; if the steam pressure rises abnormally (e.g., due to blockage of the condenser tube), the pressure sensor 58 sends a signal to the control system, automatically reducing the rotation speed and increasing the vacuum pump power to ensure stable system operation.

[0030] As can be seen from the above embodiments, this utility model achieves efficient concentration and recovery of volatile substances in water sample pretreatment through modular design and multi-component collaboration. It also has precise positioning, angle adjustment and intelligent monitoring functions, making it suitable for the diverse needs of environmental testing laboratories.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotary evaporator with modular water quality detection, characterized by, The system includes a horizontal moving component (1), a lifting component (2), a rotating seat (3), a heating water bath component (4), a condensing component (5), and a vacuum module (8). The horizontal moving component (1) is bolted to the vertical base (26) of the lifting component (2) via a horizontal slide (14). The side of the vertical slide (24) of the lifting component (2) is fixedly connected to the rotating seat (3) via an angle adjustment bracket (241). An evaporating flask (6) is rotatably connected below the rotating seat (3), and the bottom of the evaporating flask (6) is in contact with the water bath (41) of the heating water bath component (4). A steam connector (7) is fixedly connected inside the rotating seat (3), and the steam connector (7) is connected to the steam inlet end of the condensing component (5) via a high-temperature resistant hose (71). A vacuum connector (501) is provided on the top of the condensing component (5), and the vacuum connector (501) is connected to the vacuum module (8) to reduce the system pressure.

2. A modular rotary evaporator for water quality testing according to claim 1, characterized in that, The horizontal moving assembly (1) includes two parallel horizontal guide rails (11), a horizontal lead screw (12) connected to the horizontal guide rails (11), a horizontal drive motor (13) that drives the horizontal lead screw (12) to rotate, a horizontal slide (14) slidably disposed on the horizontal guide rails (11), and a horizontal base (16) that fixes the horizontal guide rails (11) and the horizontal lead screw (12); the two ends of the horizontal lead screw (12) are fixedly connected to the horizontal base (16) through bearing seats, and the output shaft of the horizontal drive motor (13) is connected to one end of the horizontal lead screw (12) through a coupling; the bottom of the horizontal slide (14) is provided with a horizontal slider (15) that cooperates with the horizontal guide rails (11), and the top is bolted to the vertical base (26).

3. The rotary evaporator with modular water quality detection according to claim 2, characterized in that, The lifting assembly (2) includes two parallel vertical guide rails (21), a vertical lead screw (22) connected to the vertical guide rails (21), a vertical drive motor (23) that drives the vertical lead screw (22) to rotate, a vertical slide (24) slidably disposed on the vertical guide rails (21), and a vertical base (26) that fixes the vertical guide rails (21) and the vertical lead screw (22). The two ends of the vertical lead screw (22) are fixedly connected to the vertical base (26) through bearing seats, and the output shaft of the vertical drive motor (23) is connected to one end of the vertical lead screw (22) through a vertical coupling (25). The bottom of the vertical slide (24) is provided with a vertical slider (27) that cooperates with the vertical guide rails (21), and the side is bolted to the angle adjustment bracket (241). The bottom of the vertical base (26) is bolted to the horizontal slide (14).

4. The rotary evaporator with modular water quality detection according to claim 3, characterized in that, The rotating base (3) includes a rotating fixing plate (31) bolted to the angle adjusting bracket (241), deep groove ball bearing seats (32) symmetrically arranged on both sides of the bottom of the rotating fixing plate (31), a rotating drive motor (33) fixed to the top of the rotating fixing plate (31), a rotating joint (34) rotatably arranged in the deep groove ball bearing seat (32), and a synchronous belt (35) connecting the rotating drive motor (33) and the rotating joint (34); the bottom of the rotating joint (34) is connected to the upper opening of the evaporation flask (6) through a flange. The top of the rotary joint (34) is connected to the bottom of the steam connector (7) via a rotary sealing bearing; the output shaft of the rotary drive motor (33) is provided with an active synchronous pulley (331), and the outer periphery of the rotary joint (34) is provided with a driven synchronous pulley (341). The active synchronous pulley (331) is connected to the driven synchronous pulley (341) via a synchronous belt (35); the upper part of the rotary fixing plate (31) is fixedly connected to a connector fixing seat (36) by bolts, and the steam connector (7) is sealed and fixed to the connector fixing seat (36) by an O-ring (72).

5. A modular rotary evaporator for water quality testing according to claim 1, characterized in that, The heating water bath assembly (4) includes a water bath (41), a heating tube (43) embedded in the bottom of the water bath (41), a temperature controller (42) electrically connected to the heating tube (43), and a liquid level sensor (44) disposed on the side of the water bath (41); the top opening of the water bath (41) contacts the bottom of the evaporation flask (6) to support the evaporation flask (6); the heating tube (43) is evenly distributed at the bottom of the water bath (41); the temperature controller (42) is used to set the heating temperature and display the water temperature in real time; the liquid level sensor (44) is electrically connected to the temperature controller (42) and triggers an alarm when the liquid level in the water bath (41) is lower than the set value.

6. A modular rotary evaporator for water quality testing according to claim 1, characterized in that, The condensation assembly (5) includes a vertical condensation tower (51), a steam inlet pipe (52) communicating with the lower side of the condensation tower (51), a discharge port (53) located at the bottom of the condensation tower (51), a heat insulation plate (54) separating the internal space of the condensation tower (51), and a condensation unit (55) installed above the heat insulation plate (54) and a collection unit (56) installed below the heat insulation plate (54); one end of the steam inlet pipe (52) is connected to the high-temperature resistant hose (71), and the other end extends into the condensation tower (51); the heat insulation plate (54) The condensing unit (55) is provided with a through hole for steam to pass through; the condensing unit (55) includes multiple sets of condensing tubes (551) arranged along the axial direction of the condensing tower (51), and the two ends of the condensing tubes (551) are respectively connected to the refrigerant outlet (571) and refrigerant inlet (572) of the refrigeration unit (57); the collecting unit (56) includes a liquid outlet pipe (561) connected to the discharge port (53), and a drain valve (562) is provided on the liquid outlet pipe (561); the steam inlet pipe (52) is provided with a pressure sensor (58) for monitoring the system vacuum.

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