A distillation cooling device for water quality detection

Abstract

This utility model discloses a distillation cooling device for water quality testing, including a base, a distillation flask, an electric heater, and a cooler. A heating tank is mounted on the support frame of the base, and the electric heater is installed inside the heating tank. A bottom bottle rack is installed inside the heating tank above the electric heater, and the distillation flask is placed on the bottom bottle rack. Bottle clamping mechanisms are symmetrically installed on both sides above the heating tank. A cooling coil is installed inside the cooler, and a gear transmission mechanism that drives the cooling coil to rotate is installed above the cooler. The inlet of the cooling coil is connected to the upper part of the distillation flask through a bent pipe, and a collection bottle is placed below the outlet of the cooling coil. An air distribution ring pipe is installed in the lower part of the cooler, and a cold air fan is installed on the base. The air distribution ring pipe and the cold air fan are connected through an air inlet pipe, and an air outlet pipe is installed at the top of the cooler. This device not only improves the heating effect and solves the problem of spray damage caused by the distillation flask moving up and down, but also achieves a better cooling effect.

Description

Technical Field

[0001] This utility model relates to the field of ecological restoration and environmental monitoring technology, specifically to a distillation cooling device for water quality testing. Background Technology

[0002] The core purpose of water quality monitoring is to scientifically evaluate water quality by systematically monitoring and measuring the types, concentrations, and trends of pollutants in water bodies. Its significance lies in providing key data support for water environment protection, public health and safety, ecological balance maintenance, and sustainable development. In water quality monitoring, distillation cooling is a crucial step in sample pretreatment, primarily used to separate and enrich target analytes such as ammonia nitrogen, volatile phenols, and cyanide. For example, in ammonia nitrogen determination, distillation cooling causes the ammonia nitrogen in the water sample to evaporate as ammonia gas during heating, which is then collected in an acidic solution after cooling. This avoids the influence of non-volatile interfering substances, providing a clear sample for subsequent titration or spectrophotometric determination. In volatile phenol determination, distillation cooling removes volatile phenols from the water sample under alkaline conditions, and after cooling, separates them from interfering impurities (such as turbidity and metal ions), which are then detected by colorimetric reactions. In cyanide determination, distillation cooling extracts and absorbs easily releasing cyanide as hydrogen cyanide gas under acidic conditions, which is then analyzed by spectrophotometry or ion-selective electrode methods. Currently, the distillation cooling device used for water quality monitoring includes a lifting bracket for mounting the distillation flask, an electric heater, and a cooler. In use, the water sample is placed into the distillation flask, which is then mounted above the electric heater. The heater heats the flask, and the resulting mixed steam enters the cooler for cooling. The cooled, evaporated target substances are then recovered, achieving the separation of the target substances. However, this device has the following shortcomings: First, the heat generated by the electric heater easily dissipates during heating, resulting in uneven heating of the distillation flask and an unsatisfactory heating effect. Additionally, the lifting mechanism causes the distillation flask to move up and down, making the installation unstable and prone to damage. Second, the existing cooler has poor cooling efficiency, with some target substances not fully cooled and recovered before being released with the steam, leading to inaccurate water quality monitoring results. Therefore, developing a distillation cooling device for water quality testing with a reasonable structure, uniform heating, and good cooling effect is objectively necessary. Summary of the Invention

[0003] The purpose of this invention is to provide a distillation cooling device for water quality testing that has a reasonable structure, uniform heating, and good cooling effect.

[0004] The purpose of this utility model is achieved as follows: It includes a base, a distillation flask, an electric heater, and a cooler. A support frame is installed on the base, and a heating barrel with an open top is installed above the support frame. The electric heater is installed in the lower part of the heating barrel. A bottom bottle rack is installed in the heating barrel above the electric heater, and the distillation flask is placed on the bottom bottle rack. Bottle clamping mechanisms are symmetrically installed on both sides of the upper part of the heating barrel. The cooler is connected and fixed to the heating barrel through a connecting frame. A cooling coil is installed inside the cooler. A gear transmission mechanism for driving the cooling coil to rotate is installed above the cooler. The inlet of the cooling coil is connected to the upper part of the distillation flask through a bent pipe. A collection bottle is placed below the outlet of the cooling coil and is placed on the base. An air distribution ring pipe is installed in the lower part of the cooler. Multiple air distribution ports are evenly distributed around the inner circumference of the air distribution ring pipe. A cold air fan is installed on the base. The air distribution ring pipe and the cold air fan are connected through an air inlet pipe. An air outlet pipe is installed on the top of the cooler.

[0005] Compared with existing technologies, this device has the following advantages: First, it changes the installation structure of the distillation flask. The distillation flask is installed inside the heating tank, and the electric heater is also installed inside the heating tank. When the electric heater heats the distillation flask, the heating tank can prevent heat loss, achieving uniform heating of the distillation flask and improving the heating effect. At the same time, the distillation flask is installed inside the heating tank and clamped and fixed by the bottle clamping components on both sides, preventing the distillation flask from tipping over and solving the problem of spray damage that occurs when the distillation flask is raised or lowered. Second, this device optimizes the structure of the cooler. The spiral coil rotates under the drive of the gear transmission mechanism, allowing the cooling coil to fully contact the cold air generated by the cold air blower, so that the target analyte in the mixed vapor is fully and uniformly cooled, thereby achieving efficient recovery of the target analyte and achieving a better cooling effect. Moreover, the rotating structure of the cooling coil can throw off the liquid droplets cooled inside the cooling coil, avoiding accumulation on the spiral coil and affecting the cooling effect. This device has the advantages of reasonable structure, good heating effect, and good cooling effect, and is easy to promote and use. Attached Figure Description

[0006] Fig. 1 This is a schematic diagram of the overall structure of this utility model; Fig. 2 This is a front view schematic diagram of the bottle clamping mechanism in this utility model; Fig. 3 This is a top view of the bottle clamping mechanism in this utility model; In the diagram: 1-Base, 2-Distillation flask, 3-Electric heating furnace, 4-Cooler, 41-Connecting frame, 42-Cooling jacket, 43-Medium inlet, 44-Medium outlet, 45-Cooling coil, 46-Upper rotary joint, 47-Lower rotary joint, 48-Collection hose, 49-Third motor, 410-Driving bevel gear, 411-Driven bevel gear, 412-Air cooler, 413-Air distribution ring pipe, 414-Air inlet pipe, 415-Air outlet 416-Air distribution cone, 5-Support frame, 6-Heating tank, 7-Bottom bottle rack, 8-Bent tube, 9-Collection bottle, 10-Moving disc, 11-First motor, 12-Rotating shaft, 13-Circular groove, 14-Support plate, 15-Second motor, 16-Transmission screw, 17-Limiting plate, 18-Slider, 19-Connecting rod, 20-Support rod, 21-Clamping arc plate, 22-Guide rod, 23-Spring, 24-Buffer arc plate. Detailed Implementation

[0007] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0008] like Figs. 1-3As shown, this utility model includes a base 1, a distillation flask 2, an electric heater 3, and a cooler 4. The distillation flask 2 and the electric heater 3 are structures used in the prior art. The distillation sieve 2 is made of high-temperature resistant glass material used in the prior art, which is convenient for operators to observe. The electric heater 3 is a heater with an electric heating tube structure. A support frame 5 is installed on the base 1, and a heating barrel 6 with an open top is installed above the support frame 5. The electric heater 3 is installed in the lower part of the heating barrel 6. A bottom bottle rack 7 is installed in the heating barrel 6 above the electric heater 3. The distillation flask 2 is placed on the bottom bottle rack 7. The bottom bottle rack 7 includes a support plate and an asbestos mesh frame plate. The support plate is processed with a placement groove adapted to the bottom of the bottle. The asbestos mesh frame plate is placed in the placement groove. The asbestos mesh frame plate can support and fix the bottom of the distillation flask 2 on the one hand, and on the other hand, it can... To improve the uniformity of heating of the distillation flask 2, flask clamping mechanisms are symmetrically installed on both sides of the upper part of the heating barrel 6. The cooler 4 is connected and fixed to the heating barrel 6 through a connecting frame 41. A cooling coil 45 is installed inside the cooler 4. A gear transmission mechanism for driving the cooling coil 45 to rotate is installed above the cooler 4. The inlet of the cooling coil 45 is connected to the upper part of the distillation flask 2 through a bent pipe 8. A collection bottle 9 is set below the outlet of the cooling coil 45 and is placed on the base 1. An air distribution ring pipe 413 is installed in the lower part of the cooler 4. Multiple air distribution ports are evenly distributed on the inner circumference of the air distribution ring pipe 413. A cold air fan 412 is installed on the base 1. The air distribution ring pipe 413 and the cold air fan 412 are connected through an air inlet pipe 414. An air outlet pipe 415 is installed on the top of the cooler 4.The working process of this device is as follows: The water sample to be monitored is placed into distillation flask 2. Depending on the properties of the analyte, specific reagents are added to distillation flask 2 (e.g., adding acid to the water sample causes phenolic compounds to be distilled out under acidic conditions, separating them from substances that may cause color or chemical reaction interference; or adding acid causes cyanide in the water sample to form volatile hydrogen cyanide in an acidic medium, which is absorbed by distillation and separated from the large amount of coexisting sulfide ions and metal ions; or adjusting the pH of the water sample to approximately neutral allows ammonia to be separated in gaseous form through distillation, avoiding interference with sample turbidity, color, and certain other factors). (To prevent interference from organic matter), after the water sample is processed in distillation flask 2, the stopper is closed, and distillation flask 2 is placed on the bottom rack 7. The bottle body clamping mechanism is used to clamp and fix the distillation flask 2, ensuring that it is stably installed in the heating tank 6. Subsequently, the electric heater 3 is powered on to heat distillation flask 2. During the heating process, the heating tank 6 can prevent heat loss and achieve uniform heating of distillation flask 2. When the water sample reaches the boiling point or the volatilization temperature of the target analyte, the water vapor carries the volatile target components (such as phenol, hydrogen cyanide, ammonia) and vaporizes together. The resulting mixed steam... The air enters the cooling coil 45 through the bend pipe 8, controlling the gear transmission mechanism to drive the cooling coil 45 to rotate. Simultaneously, the cold air generated by the air cooler 412 enters the air distribution ring pipe 413 through the air inlet pipe 414. The cold air in the air distribution ring pipe 413 is distributed to the cooler 4 through the air distribution port and flows upward within the cooler 4. During this upward flow, the rotating cooling coil 45 is thoroughly and evenly cooled, ensuring the target analyte in the mixed vapor is adequately cooled. The cooled target analyte finally enters the collection bottle 2 for collection. The temperature of the cold air after heat exchange with the cooling coil 4 is... After the temperature rises, the air is discharged from the air outlet 415. Depending on the usage requirements, a flow control valve can be installed on the air inlet 414 to control the flow rate of cold air entering the cooler 4. During the rotation of the cooling coil 45, the cooled target analytes can be thrown into the collection bottle 9 in time, so that the target analytes do not accumulate in the cooling coil 45 and affect the cooling efficiency. After distillation, the electric heating furnace 3 is turned off. Interfering substances with high boiling points and low volatility (such as most metal ions, high molecular weight organic matter, suspended matter, etc.) in the water sample are retained in the distillation flask 2, thereby realizing the distillation separation of the target analytes in the water sample.

[0009] To ensure more uniform heating of the distillation flask 2, a circumferential groove 13 is machined into the lower part of the heating tank 6. A movable disc 10 is slidably installed within the circumferential groove 13. The electric heater 3 is mounted on the movable disc 10. A first motor 11 is mounted on the support frame 5. The first motor 11 is a structure used in the prior art, and a finished product can be directly purchased according to the power required. A rotating shaft 12 is rotatably installed through the center of the bottom of the heating tank 6. The upper end of the rotating shaft 12 is fixedly connected to the bottom of the movable disc 10, and the lower end of the rotating shaft 12 is driven by the output shaft of the first motor 11. During the heating of the distillation flask 2, the electric heater 3 can turn on the first motor 11 according to the actual usage. The first motor 11 drives the rotating shaft 12 to rotate, which in turn drives the movable disc 10 to rotate. The movable disc 10 drives the electric heater 3 to rotate, and the rotating electric heater 3 heats the distillation flask 2 more uniformly.

[0010] Furthermore, to achieve stable clamping of the body of distillation flask 2, the flask clamping mechanism includes a support plate 14, a second motor 15, and a transmission screw 16. The second motor 15 is a structure used in the prior art, and a finished product is directly purchased according to the power required. The support plate 14 is vertically installed on the outside of the heating tank 6, and the second motor 15 is installed on the outside of the support plate 14. The transmission screw 16 is rotatably installed on the support plate 14 and the heating tank 6. One end of the transmission screw 16 is connected to the second motor 15, and the other end of the transmission screw 16 is equipped with a limit plate 17. A slider 18 is threaded onto the transmission screw 16, and a connecting rod 19 is installed on the top of the slider 18. A support rod 20 is vertically installed at the end of the connecting rod 19. Clamping arc plates 21 that cooperate with the body of distillation flask 2 are installed at both the upper and lower ends of the support rod 20. After the flask body is placed between the two clamping arc plates 21 and placed on the bottom bottle rack 7, the distillation flask is then opened. The second motor 15 is started, which drives the corresponding transmission screw 16 to rotate forward. The forward rotation of the transmission screw 16 drives the slider 18, connecting rod 19, support rod 20, and clamping arc plate 21 to move along the direction of the distillation flask 2. When the two clamping arc plates 21 move to contact the body of the distillation flask 2, they clamp and fix the distillation flask 2 to the bottom support 7 to prevent the distillation flask 7 from tipping over. Then the second motor 15 is turned off. Conversely, when it is necessary to release the clamping arc plate 21 from the distillation flask 2, the second motor 15 is started again. The second motor 15 drives the corresponding transmission screw 16 to rotate in reverse. The reverse rotation of the transmission screw 16 drives the slider 18, connecting rod 19, support rod 20, and clamping arc plate 21 to move along the direction of the support plate 14. When the two clamping arc plates 21 move to the point where they are no longer in contact with the distillation flask 2, the second motor 15 stops running, and the clamping arc plate 21 releases the clamping fixation of the distillation flask 2. The adjustment and use are relatively convenient. Preferably, to ensure the smooth movement of the slider 18 and allow the clamping arc plate 21 to accurately clamp the bottle body, a guide rod 22 is arranged parallel between the limiting plate 17 and the support plate 14 on both sides of the transmission screw 16. The slider 18 is slidably mounted on the guide rod 22. The guide rod 22 has a guiding function, which can ensure that the slider 18 always maintains a horizontal linear movement state, allowing the clamping arc plate 21 to accurately clamp the bottle body. In order to avoid damage to the bottle body during the clamping process of the clamping arc plate 21, multiple springs 23 are evenly distributed on the clamping arc plate 21 on the side close to the bottle body of the distillation flask 2. The ends of the springs 23 are equipped with buffer arc plates 24 with the same curvature as the clamping arc plate 21. The buffer springs 23 have a buffering and shock-absorbing function, which can reduce the shaking of the distillation flask 2, protect the distillation flask 2 from damage, and play a certain protective role for the distillation flask 2.

[0011] Furthermore, the gear transmission mechanism includes a third motor 49, a driving bevel gear 410, and a driven bevel gear 411. The third motor is a structure used in the prior art, and finished products can be directly purchased according to the usage requirements. The cooling coil 45 includes an upper pipe section, a spiral section, and a lower pipe section connected in sequence. The upper pipe section is rotatably mounted on the top of the cooler 4, and an upper rotary joint 46 is rotatably mounted on the upper end of the upper pipe section. The upper rotary joint 46 is connected to the bent pipe 8. The lower pipe section is rotatably mounted on the bottom of the cooler 4, and a lower rotary joint 47 is mounted on the lower end of the lower pipe section. A collection hose 48 is mounted on the lower rotary joint 47, and the collection hose 48 is connected to the collection bottle 9. The third motor 49 is installed on... Above the cooling inner cylinder, the driving bevel gear 410 is mounted on the output shaft of the third motor 49, and the driven bevel gear 411 is mounted on the upper straight pipe section. The driven bevel gear 411 and the driving bevel gear 410 mesh with each other. The upper rotary joint 46 and the lower rotary joint 47 are both rotary joint structures used in the prior art. It is only necessary to purchase finished products according to the pipe diameter. When in use, the third motor 49 is turned on, and the third motor 49 drives the driving bevel gear 410 to rotate. The rotation of the driving bevel gear 410 drives the driven bevel gear 411 to rotate. The rotation of the driven bevel gear 411 can drive the upper pipe section, the spiral section and the lower pipe section to rotate synchronously, so that the cooling coil 45 can fully contact the cold air and improve the cooling effect.

[0012] Preferably, in order to improve the cooling effect, a cooling jacket 42 is provided on the outer side of the cooler 4 at intervals. The lower part of the cooling jacket 42 is provided with a medium inlet 43 and the upper part is provided with a medium outlet 44. Cooling medium, which is cold water, is supplied into the cooling jacket 42 through the medium inlet 43. The cooling medium can perform secondary cooling on the cooler 4. After the cooling water exchanges heat with the cooler 4, it is discharged from the medium outlet. The setting of the cooling jacket 42 is conducive to improving the cooling effect.

[0013] Furthermore, in order to prolong the contact time between the cold air and the cooling coil 45 and improve the cooling effect of the cold air on the cooling coil 45, multiple air distribution cones 416 are installed at equal intervals from top to bottom on the inner wall of the cooling inner cylinder outside the cooling coil 45. The air distribution cones 416 have a structure that is larger at the top and smaller at the bottom. Multiple air guide holes are evenly distributed on the air distribution cones 416. After the cold air enters the cooler 4, it passes through the distribution of multiple air distribution cones 416, which can prolong the residence time of the cold air in the cooler 4, increase the contact time between the cold air and the cooling coil 45, and improve the cooling effect of the cold air on the cooling coil 45.

Claims

1. A distillation cooling device for water quality testing, comprising a base (1), a distillation flask (2), an electric heating furnace (3), and a cooler (4), characterized in that: A support frame (5) is installed on the base (1). A heating barrel (6) with an open top is installed above the support frame (5). An electric heater (3) is installed in the lower part of the heating barrel (6). A bottom bottle rack (7) is installed in the heating barrel (6) above the electric heater (3). The distillation flask (2) is placed on the bottom bottle rack (7). Bottle clamping mechanisms are symmetrically installed on both sides above the heating barrel (6). The cooler (4) is connected and fixed to the heating barrel (6) through a connecting frame (41). A cooling coil (45) is installed inside the cooler (4). A drive cooling coil (45) is installed above the cooler (4). The gear transmission mechanism rotates, the inlet of the cooling coil (45) is connected to the upper part of the distillation flask (2) through the bent pipe (8), a collection bottle (9) is provided below the outlet of the cooling coil (45), the collection bottle (9) is placed on the base (1), the lower part of the cooler (4) is equipped with an air distribution ring pipe (413), multiple air distribution ports are evenly distributed on the inner circumference of the air distribution ring pipe (413), a cold air fan (412) is installed on the base (1), the air distribution ring pipe (413) and the cold air fan (412) are connected through an air inlet pipe (414), and an air outlet pipe (415) is installed on the top of the cooler (4).

2. The distillation cooling device for water quality testing according to claim 1, characterized in that: The lower part of the heating barrel (6) is machined with a circumferential groove (13), and a movable disc (10) is slidably installed in the circumferential groove (13). The electric heating furnace (3) is installed on the movable disc (10). A first motor (11) is installed on the support frame (5). A rotating shaft (12) is rotatably installed through the center of the bottom of the heating barrel (6). The upper end of the rotating shaft (12) is fixedly connected to the bottom of the movable disc (10), and the lower end of the rotating shaft (12) is drivenly connected to the output shaft of the first motor (11).

3. The distillation cooling device for water quality testing according to claim 1, characterized in that: The bottle clamping mechanism includes a support plate (14), a second motor (15), and a transmission screw (16). The support plate (14) is vertically installed on the outside of the heating barrel (6). The second motor (15) is installed on the outside of the support plate (14). The transmission screw (16) is rotatably installed on the support plate (14) and the heating barrel (6). One end of the transmission screw (16) is connected to the second motor (15). The other end of the transmission screw (16) is equipped with a limit plate (17). A slider (18) is threaded onto the transmission screw (16). A connecting rod (19) is installed on the top of the slider (18). A support rod (20) is vertically installed at the end of the connecting rod (19). A clamping arc plate (21) that cooperates with the body of the distillation flask (2) is installed on both the upper and lower ends of the support rod (20).

4. The distillation cooling device for water quality testing according to claim 3, characterized in that: A guide rod (22) is provided in parallel between the limiting plate (17) and the support plate (14) on both sides of the transmission screw (16), and the slider (18) is slidably mounted on the guide rod (22).

5. A distillation cooling device for water quality testing according to claim 3, characterized in that: Multiple springs (23) are evenly distributed on the clamping arc plate (21) near the body of the distillation flask (2), and the ends of the springs (23) are fitted with buffer arc plates (24) with the same curvature as the clamping arc plate (21).

6. The distillation cooling device for water quality testing according to claim 1, characterized in that: The gear transmission mechanism includes a third motor (49), a driving bevel gear (410), and a driven bevel gear (411). The cooling coil (45) includes an upper pipe section, a spiral section, and a lower pipe section connected in sequence. The upper pipe section is rotatably mounted on the top of the cooler (4). An upper rotary joint (46) is rotatably mounted on the upper end of the upper pipe section. The upper rotary joint (46) is connected to the bent pipe (8). The lower pipe section is rotatably mounted on the bottom of the cooler (4). A lower rotary joint (47) is mounted on the lower end of the lower pipe section. A collection hose (48) is mounted on the lower rotary joint (47). The collection hose (48) is connected to the collection bottle (9). The third motor (49) is mounted above the cooler (4). The driving bevel gear (410) is mounted on the output shaft of the third motor (49). The driven bevel gear (411) is mounted on the upper straight pipe section. The driven bevel gear (411) meshes with the driving bevel gear (410).

7. A distillation cooling device for water quality testing according to claim 6, characterized in that: The cooler (4) is provided with cooling jackets (42) at intervals on the outside. The cooling jackets (42) have a medium inlet (43) at the bottom and a medium outlet (44) at the top.

8. A distillation cooling device for water quality testing according to claim 6, characterized in that: Multiple air distribution cones (416) are installed at equal intervals from top to bottom on the inner wall of the cooling inner cylinder outside the cooling coil (45). The air distribution cones (416) have a structure that is larger at the top and smaller at the bottom, and multiple air guide holes are evenly distributed on the air distribution cones (416).

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