Ammonia nitrogen distillation apparatus

Abstract

This invention relates to an ammonia nitrogen distillation apparatus, comprising a frame, an ammonia nitrogen separation device, and a collection device. The frame has a collection station. The ammonia nitrogen separation device is located on the frame and includes a distillation head, a first lifting assembly, and a steam generating assembly. The distillation head has an open receiving cavity and a steam inlet and a steam outlet communicating with the receiving cavity. The first lifting assembly is vertically movable and is used to press a sample bottle against the receiving cavity from bottom to top through the opening. The steam generating assembly is connected to the steam inlet and is used to input a fixed amount of steam into the sample bottle. The collection device is located at the collection station and includes a weighing device and a condenser. The condenser is connected to the steam outlet and the collection bottle, respectively. This invention accurately controls the amount of liquid entering the collection bottle by combining the fixed amount of steam input and the weight measured by the weighing device, thereby improving the accuracy of subsequent ammonia nitrogen measurements and resulting in smaller errors in the detection results.

Description

Technical Field

[0001] This invention relates to the field of ammonia nitrogen detection equipment technology, and in particular to an ammonia nitrogen distillation device. Background Technology

[0002] Distillation is a thermodynamic separation process that utilizes the different boiling points of components in a mixed liquid or liquid-solid system to evaporate the low-boiling-point component and then condense it to separate the entire component. It is a unit operation that combines evaporation and condensation.

[0003] CN204594772U A water ammonia nitrogen distillation apparatus includes an electric heating mantle, a Kjeldahl flask, a nitrogen-fixing bulb, a condenser, and a receiving bottle. The straight tube of the nitrogen-fixing bulb extends into the Kjeldahl flask, and the inclined tube of the nitrogen-fixing bulb is connected to the top end of the condenser. The bottom end of the condenser is connected to the receiving bottle, and a conduit is connected to the bottom end of the condenser. The conduit extends into the receiving bottle, and a detection chamber is provided at the upper part of the conduit. An infrared pair is provided on the outer wall of the detection chamber, and the infrared pair is electrically connected to a pulse counter.

[0004] However, the aforementioned existing technologies only use pulse counters for measurement, resulting in poor measurement accuracy and large errors in the detection results. Summary of the Invention

[0005] In view of this, it is necessary to provide an ammonia nitrogen distillation device to solve the technical problems of poor measurement accuracy and large error in detection results caused by the use of pulse counters alone in the existing technology.

[0006] This invention provides an ammonia nitrogen distillation apparatus, which includes:

[0007] The machine frame is equipped with a collection station;

[0008] An ammonia nitrogen separation device is mounted on the frame. The ammonia nitrogen separation device includes a distillation head, a first lifting assembly, and a steam generating assembly. The distillation head has a receiving cavity with an opening at the lower end. The distillation head also has a steam inlet and a steam outlet communicating with the receiving cavity. The first lifting assembly is located below the distillation head and is movably arranged in the vertical direction. The first lifting assembly is used to press a sample bottle against the receiving cavity from bottom to top through the opening, so that the sample bottle and the distillation head are sealed together. The steam generating assembly is connected to the steam inlet and is used to input a certain amount of steam into the sample bottle.

[0009] A collection device is provided at the collection station. The collection device includes a weighing device and a condenser. The weighing device is used to place the collection bottle and weigh the collection bottle and the liquid inside it. The condenser is connected to the steam outlet and the collection bottle respectively. The condenser is used to condense the steam output from the distillation head into liquid and transport it into the collection bottle.

[0010] Optionally, the steam generating assembly includes a liquid injector and a steam generator, wherein the liquid injector, the steam generator, and the distillation head are connected in sequence, the liquid injector is used to input a certain amount of water into the steam generator, and the steam generator is used to vaporize the water into steam and deliver it to the distillation head, wherein the steam generator is made of polytetrafluoroethylene.

[0011] Optionally, the injector includes an injection cylinder, a piston assembly, and a first drive assembly. The injection cylinder is mounted on the frame, and its lower end has an interface connecting to its inner cavity. The interface communicates with the steam generator. The piston assembly is slidably mounted on the injection cylinder in a vertical direction, and its upper end extends out of the injection cylinder. The first drive assembly is connected to the upper end of the piston assembly and is used to drive the piston assembly to move.

[0012] Optionally, the first drive assembly includes a connector, a first lead screw, and a first drive motor. The connector is slidably mounted on the base in a vertical direction and is connected to the upper end of the piston assembly. The connector is also provided with a threaded hole. The first lead screw is rotatably mounted on the base along a vertical axis and is threadedly engaged with the connector. The first drive motor is connected to one end of the first lead screw.

[0013] Optionally, the steam generator includes a steam generating element and a heating element. The steam generating element is disposed on the frame and has a vaporization chamber and a first inlet and a first outlet communicating with the vaporization chamber. The first inlet is communicating with the interface and the first outlet is communicating with the steam inlet. The steam generating element also has a mounting hole located below the vaporization chamber. The heating element is disposed in the mounting hole and is used to vaporize the water in the vaporization chamber.

[0014] Optionally, the ammonia nitrogen separation device further includes a heat preservation cylinder, which is sleeved around the outer periphery of the distillation head to keep the distillation head warm, wherein the distillation head is made of polytetrafluoroethylene.

[0015] Optionally, the ammonia nitrogen distillation equipment further includes a feeding assembly, which includes a sample tray and a first driving mechanism. The sample tray is rotatably mounted on the frame along a vertical axis and is located between the distillation head and the first lifting assembly. The sample tray has multiple sample holes, which are spaced apart circumferentially. The sample holes are used to place sample bottles. The first driving mechanism is connected to the sample tray and is used to drive the sample tray to rotate.

[0016] Optionally, the weighing device is movably mounted on the frame along a first direction, so as to have a working state that moves to the collection station and a avoidance state that moves out of the collection station.

[0017] Optionally, the ammonia nitrogen distillation equipment further includes a collection assembly, which includes a collection tray, a second drive mechanism, a second lifting assembly, and a clamping assembly. The collection tray is rotatably mounted on the frame along a vertical axis and is located below the weighing device. The collection tray has multiple collection holes spaced circumferentially for placing collection bottles. The second drive mechanism is connected to the collection tray. The second lifting assembly is movably mounted on the frame along a vertical direction and is located below the collection tray. The clamping assembly is located above the weighing device so that, in the avoidance state, the second lifting assembly lifts the collection bottle and the clamping assembly clamps the collection bottle, so that, in the working state, the clamping assembly releases the collection bottle so that the collection bottle is placed on the weighing device.

[0018] Optionally, the condenser includes a condenser tube, a collecting tube, and a water pumping device. The condenser tube has a first cavity and a second cavity spaced apart in the inward and outward directions. The condenser tube also has an inlet and an outlet communicating with the first cavity, and a steam inlet and a condensate outlet communicating with the second cavity. The steam inlet is connected to the steam outlet. The upper end of the collecting tube is connected to the condensate outlet, and the lower end of the collecting tube is used to extend into a collecting bottle. The water pumping device is connected to the inlet and the outlet respectively.

[0019] Optionally, the ammonia nitrogen distillation equipment further includes a cleaning component, which is disposed on the frame and is used to clean the collection tube.

[0020] Optionally, the distillation head is elastically and telescopically mounted on the frame in the vertical direction.

[0021] Compared with the prior art, the ammonia nitrogen distillation apparatus provided by the present invention has a distillation head with a receiving cavity open at the lower end and a steam inlet and a steam outlet communicating with the receiving cavity. A first lifting assembly is located below the distillation head and is vertically movable. The first lifting assembly is used to press the sample bottle against the receiving cavity from bottom to top through the opening, so that the sample bottle and the distillation head are sealed together. A steam generating assembly is connected to the steam inlet and is used to input a certain amount of steam into the sample bottle. A weighing device is used to place a collection bottle and weigh the collection bottle and its liquid. A condenser is connected to both the steam outlet and the collection bottle and is used to condense the steam output from the distillation head. The sample bottle is filled with liquid and transported to a collection bottle. In actual use, the first lifting component moves the sample bottle vertically upward, sealing it with the distillation head. Then, a certain amount of steam is supplied to the sample bottle through the steam generating component. The steam distills the ammonia nitrogen in the sample bottle and enters the condenser through the steam outlet, where it is condensed into liquid and enters the collection bottle. The collection bottle is then placed on a weighing device, which can be used to weigh the liquid in the sample bottle. By combining the quantitatively input steam and the weight measured by the weighing device, the amount of liquid entering the collection bottle can be accurately controlled, improving the accuracy of subsequent ammonia nitrogen measurements and resulting in a smaller error in the detection results.

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the ammonia nitrogen distillation equipment provided by the present invention;

[0025] Figure 2 for Figure 1 A three-dimensional schematic diagram of an ammonia nitrogen distillation unit with the frame removed.

[0026] Figure 3 For Figure 2 The main view of the ammonia nitrogen distillation unit with the frame removed;

[0027] Figure 4 for Figure 2 A three-dimensional structural diagram of the feeding and collecting components;

[0028] Figure 5for Figure 2 A three-dimensional structural diagram of the ammonia nitrogen separation and collection device;

[0029] Figure 6 for Figure 2 A partial cross-sectional view of the ammonia nitrogen separation unit;

[0030] Figure 7 for Figure 2 Cross-sectional view of the central condenser tube;

[0031] Figure 8 for Figure 2 Front sectional view of the steam generator;

[0032] Figure 9 for Figure 2 Left sectional view of the steam generator;

[0033] Figure 10 for Figure 2 A three-dimensional structural diagram of the injection device;

[0034] Figure 11 for Figure 10 Cross-sectional view of the injection device.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100-Ammonia nitrogen distillation equipment, 1-Frame, 2-Ammonia nitrogen separation device, 21-Distillation head, 22-First lifting assembly, 23-Liquid injector, 231-Liquid injection cylinder, 232-Piston assembly, 233-Connector, 234-First lead screw, 235-First drive motor, 24-Steam generator, 241-Box body, 2411-Mounting cavity, 242-Steam generator, 2421-Vaporization chamber, 2422-First inlet, 2423-First outlet, 2424-Baffle plate, 2425-Mounting hole, 243-Heating element, 25-Insulation cylinder, 3-Collection device, 3 1-Weighing device, 311-Gravity sensor, 312-Third drive assembly, 32-Condenser, 321-Condenser tube, 3211-First cavity, 3212-Second cavity, 322-Collection tube, 323-Water pump device, 4-Feeding assembly, 41-Sample tray, 411-Sample hole, 42-First drive mechanism, 5-Collection assembly, 51-Collection tray, 511-Collection hole, 52-Second drive mechanism, 53-Second lifting assembly, 54-Clamping assembly, 6-Cleaning assembly, 7-Guiding assembly, 71-Guiding cylinder, 200-Sample bottle, 300-Collection bottle. Detailed Implementation

[0037] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0038] Please see Figures 1 to 3 The ammonia nitrogen distillation apparatus 100 includes a frame 1, an ammonia nitrogen separation device 2, and a collection device 3. The frame 1 is provided with a collection station. The ammonia nitrogen separation device 2 is located on the frame 1 and includes a distillation head 21, a first lifting assembly 22, and a steam generating assembly. The distillation head 21 has a receiving cavity with an opening at the lower end, and also has a steam inlet and a steam outlet communicating with the receiving cavity. The first lifting assembly 22 is located below the distillation head 21 and is movably arranged in the vertical direction. The first lifting assembly 22 is used to press the sample bottle 200 against the opening from bottom to top. The sample bottle 200 is sealed to the distillation head 21 within the receiving cavity. The steam generating assembly is connected to the steam inlet and is used to input a fixed amount of steam into the sample bottle 200. The collecting device 3 is located at the collecting station and includes a weighing device 31 and a condenser 32. The weighing device 31 is used to place the collecting bottle 300 and weigh the collecting bottle 300 and its liquid. The condenser 32 is connected to the steam outlet and the collecting bottle 300, and is used to condense the steam output from the distillation head 21 into liquid and transport it into the collecting bottle 300.

[0039] The ammonia nitrogen distillation apparatus 100 provided by this invention includes a distillation head 21 with a receiving cavity open at the lower end and a steam inlet and a steam outlet communicating with the receiving cavity. A first lifting assembly 22 is located below the distillation head 21 and is vertically movable. The first lifting assembly 22 is used to press a sample bottle 200 against the receiving cavity from bottom to top through the opening, so that the sample bottle 200 and the distillation head 21 are sealed together. A steam generating assembly is connected to the steam inlet and is used to input a certain amount of steam into the sample bottle 200. A weighing device 31 is used to place a collection bottle 300 and to weigh the collection bottle 300 and the liquid inside it. A condenser 32 is connected to both the steam outlet and the collection bottle 300 and is used to condense the steam output from the distillation head 21 into steam. The liquid is then transported to the collection bottle 300. In actual use, the first lifting component 22 drives the sample bottle 200 to move vertically upward, sealing the sample bottle 200 with the distillation head 21. Subsequently, a certain amount of steam is supplied to the sample bottle 200 through the steam generating component. The steam distills the ammonia nitrogen element in the sample bottle 200 and enters the condenser 32 through the steam outlet, where it is condensed into liquid and enters the collection bottle 300. The collection bottle 300 is then placed on the weighing device 31, and the weight of the liquid in the sample bottle 200 can be measured through the weighing device 31. By combining the quantitatively input steam and the weight measured by the weighing device 31, the amount of liquid entering the collection bottle can be accurately controlled, improving the detection accuracy of subsequent ammonia nitrogen measurements and resulting in a smaller error in the detection results.

[0040] Further, please see Figures 2 to 3 In this embodiment, the steam generating assembly includes a liquid injector 23 and a steam generator 24, which are connected sequentially to the distillation head 21. The liquid injector 23 is used to input a fixed amount of water into the steam generator 24, and the steam generator 24 is used to vaporize the water into steam and deliver it to the distillation head 21. In actual use, the liquid injector 23 is first started, and water is continuously input into the steam generator 24 through the liquid injector 23. The steam generator 24 vaporizes the water into steam, and then the steam enters the sample bottle 200 to distill the sample in the sample bottle 200, distilling out the ammonia nitrogen. With this setup, the liquid injector 23 can input water into the steam generator 24 in a fixed amount, thereby enabling the steam generator 24 to generate a fixed amount of steam. By delivering the steam in a fixed amount, the amount of liquid that finally enters the collection bottle is ensured, improving the accuracy of subsequent ammonia nitrogen measurement.

[0041] Furthermore, the specific form of the injector 23 is not limited; please refer to [link / reference]. Figures 10 to 11In this embodiment, the injector 23 includes an injection cylinder 231, a piston assembly 232, and a first drive assembly. The injection cylinder 231 is disposed on the frame 1. The lower end of the injection cylinder 231 is provided with an interface connecting to its inner cavity. The interface is connected to the steam generator 24. The piston assembly 232 is slidably mounted on the injection cylinder 231 in the vertical direction, and its upper end extends out of the injection cylinder 231. The first drive assembly is connected to the upper end of the piston assembly 232 and is used to drive the piston assembly 232 to move. Specifically, the upper end of the injection cylinder 231 is provided with an opening, which connects to the inner cavity of the injection cylinder 231. The piston assembly 232 includes a piston rod and a piston head located at the lower end of the piston rod. The piston head is in a sealed sliding fit with the inner cavity of the injection cylinder 231. The upper end of the piston rod extends out of the injection cylinder 231 from the opening. In use, clean water is stored in the space between the piston head and the interface. When the first drive assembly drives the piston head to move vertically downward, it can push the clean water from the interface to the steam generator 24. This configuration can achieve the purpose of quantitative injection.

[0042] Further, please see Figures 10 to 11 The first driving assembly includes a connector 233, a first lead screw 234, and a first driving motor 235. The connector 233 is slidably mounted on the base in the vertical direction and is connected to the upper end of the piston assembly 232. The connector 233 also has a threaded hole. The first lead screw 234 is rotatably mounted on the base along the vertical axis and is threadedly engaged with the connector 233. The first driving motor 235 is connected to one end of the first lead screw 234. The first driving motor 235 drives the first lead screw 234 to rotate. The threaded engagement of the first lead screw 234 with the connector 233 causes the connector 233 to move. The connector 233 is connected to the upper end of the piston rod, thereby driving the movement of the piston head. The injection process requires no manual operation, has a high degree of automation, and achieves precise injection.

[0043] Further, please see Figures 8 to 9In this embodiment, the steam generator 24 includes a steam generating element 242 and a heating element 243. The steam generating element 242 is disposed on the frame 1. The steam generating element 242 has a vaporization chamber 2421 and a first inlet 2422 and a first outlet 2423 communicating with the vaporization chamber 2421. The first inlet 2422 is connected to the interface, and the first outlet 2423 is connected to the steam inlet. The steam generating element 242 also has a mounting hole 2425 located below the vaporization chamber 2421. The heating element 243 is disposed in the mounting hole 2425 and is used to vaporize the water in the vaporization chamber 2421.

[0044] Further, please see Figures 8 to 9 The number of heating elements 243 is not specifically limited. In this embodiment, there are four heating elements 243. Correspondingly, there are also four mounting holes 2425. The four mounting holes 2425 are arranged at intervals along the width direction of the steam generator 242.

[0045] Further, please see Figures 8 to 9 The bottom of the vaporization chamber 2421 is also provided with a baffle 2424. The baffle 2424 is provided corresponding to the first inlet 2422. By providing the baffle 2424, the first inlet 2422 can be prevented from directly corresponding to the first outlet 2423, thus prolonging the time of the liquid in the vaporization chamber 2421 and allowing the liquid to be fully vaporized into steam.

[0046] Further, please see Figures 8 to 9 The steam generator 24 also includes a housing 241, which has an installation cavity 2411. The steam generating element 242 and the heating element 243 are both located in the installation cavity 2411. The housing 241 can serve as a heat insulation unit to prevent the heat generated by the heating element 243 from being dissipated to the outside in the form of thermal radiation.

[0047] Furthermore, the housing 241 is provided with a second inlet and a second outlet communicating with the mounting cavity 2411. The housing 241 also includes an inlet connector and an outlet connector. The inlet connector is installed at the second inlet. One end of the inlet connector is connected to the first inlet 2422 through a liquid inlet connecting pipe. The other end of the inlet connector is connected to the liquid injector 23. The outlet connector is installed at the outlet. One end of the outlet connector is connected to the first outlet 2423. The other end of the outlet connector is connected to the distillation head 21.

[0048] Furthermore, the liquid inlet connecting pipe is bent and extended to cover the mounting cavity 2411. Since the temperature inside the mounting cavity 2411 is higher than the outside temperature, this arrangement can preheat the liquid and improve the vaporization efficiency.

[0049] Furthermore, the steam generator is connected to the distillation head via a pipe. The steam inlet is located beside the distillation head, and the steam outlet is located at the top of the distillation head. The steam outlet extends vertically upward and is bent at the upper end, connecting to the condenser. The steam flow direction is as follows: steam enters the sample bottle from the steam inlet, carrying away the ammonia nitrogen element in the sample bottle, and then exits upward from the steam outlet into the condenser.

[0050] Furthermore, since there is a temperature difference between the distillation head and the steam (i.e., the steam is at a higher temperature), to prevent condensation and backflow when the steam exits upwards from the steam outlet, please refer to [link to relevant documentation]. Figure 6 In this embodiment, the ammonia-nitrogen separation device 2 further includes a heat-insulating cylinder 25, which is fitted around the outer periphery of the distillation head 21 to insulate it. This ensures that the upper part of the entire distillation head, particularly the steam outlet, is located inside the heat-insulating cylinder. The cylinder insulates this part, reducing the temperature difference between the distillation outlet and the steam, thus guaranteeing the temperature of the steam discharged from the steam outlet. This prevents condensation and backflow at the steam outlet, avoiding steam loss and ensuring that all steam enters the condenser. The combined use of the steam generator and the heat-insulating cylinder ensures a quantitative input of steam, thereby improving the accuracy of the entire device.

[0051] Furthermore, existing distillation heads are made of food-grade silicone. However, when steam enters a food-grade silicone distillation head, leaching occurs, reducing the purity of the steam and causing turbidity in the final collection bottle. This affects the accuracy of the entire device, limiting it to milligram-level ammonia nitrogen measurements. In this embodiment, the distillation head 21 is made of polytetrafluoroethylene (PTFE). PTFE distillation heads 21 have excellent heat resistance and can be used continuously at -180 to 260°C. PTFE distillation heads 21 are resistant to acids, alkalis, and various organic solvents, and are virtually insoluble in all solvents. This significantly reduces the leaching of the material itself, improving the accuracy of ammonia nitrogen detection. This device can achieve microgram-level ammonia nitrogen measurements.

[0052] Further, please see Figures 2 to 4The ammonia nitrogen distillation equipment 100 further includes a feeding assembly 4, which includes a sample tray 41 and a first driving mechanism 42. The sample tray 41 is rotatably mounted on the frame 1 along a vertical axis and is located between the distillation head 21 and the first lifting assembly 22. The sample tray 41 is provided with a plurality of sample holes 411, which are arranged circumferentially at intervals. The sample holes 411 are used for placing sample bottles 200. The first driving mechanism 42 is connected to the sample tray 41 and is used to drive the sample tray 41 to rotate. In practical use, the sample tray 41 rotates, aligning one of the sample holes 411 with the first lifting component 22. Then, the first lifting component 22 moves vertically upward, lifting the sample bottle 200 in the sample hole 411 until it is sealed with the distillation head 21, allowing ammonia nitrogen separation of the sample in the sample bottle 200. After the ammonia nitrogen distillation in the sample bottle 200 is completed, the first lifting component 22 moves vertically downward. At this time, the sample bottle 200 moves downward with the first lifting component 22 under its own gravity, returning to the sample hole 411. Then, the sample tray 41 rotates, aligning the next sample hole 411 with the first lifting component 22, thus allowing ammonia nitrogen distillation of the next sample. This method is highly automated and can perform batch testing of multiple samples.

[0053] Further, please see Figure 5 In this embodiment, the weighing device 31 is movably mounted on the frame 1 along a first direction, having a working state where it moves to the collection station and a avoidance state where it moves away from the collection station. Specifically, the weighing device 31 includes a gravity sensor 311 and a third drive assembly 312. The gravity sensor 311 is movably mounted on the frame 1 along the first direction and is used for placing the collection bottle 300. The third drive assembly is connected to the gravity sensor 311 and is used to drive the gravity sensor 311 to move.

[0054] Further, please see Figures 2 to 4The ammonia nitrogen distillation equipment 100 further includes a collection component 5, which includes a collection tray 51, a second drive mechanism 52, a second lifting component 53, and a clamping component 54. The collection tray 51 is rotatably mounted on the frame 1 along a vertical axis and is located below the weighing device 31. The collection tray 51 has a plurality of collection holes 511, which are spaced apart circumferentially. The collection holes 511 are used to place the collection bottle 300. The second drive mechanism 52 is connected to the collection tray 51. The second lifting component 53 is movably mounted on the frame 1 along a vertical direction and is located below the collection tray 51. The clamping component 54 is located above the weighing device 31. In the avoidance state, the second lifting component 53 is used to lift the collection bottle 300, and the clamping component 54 clamps the collection bottle 300. In the working state, the clamping component 54 releases the collection bottle 300 so that the collection bottle 300 is placed on the weighing device 31. In practical use, the weighing device 31 first moves to the clearance state, then the second lifting component 53 moves vertically upward to lift the collection bottle 300 in one of the collection holes 511. After the collection bottle 300 moves to the position of the clamping component 54, the clamping component 54 clamps the clamping device. Then, the second lifting component 53 moves downward to return to its initial position. At this time, the weighing device 31 moves to the working state, and the clamping component 54 places the collection bottle 300 on the weighing device. The collection bottle 300 is then released from the weighing device 31, completing the placement of the collection bottle 300. After the measurement is completed, the clamping device clamps the collection bottle 300 again, the weighing device 31 moves to the avoidance device, the lifting component moves vertically upward to abut against the bottom of the collection bottle 300, and drives the collection bottle 300 vertically downward back into its corresponding collection hole 511. Then the collection tray 51 rotates, so that the next collection hole 511 is aligned with the second lifting component 53. The automation level is high, and multiple samples can be tested in batches.

[0055] Furthermore, to prevent the collection bottle 300 from swaying and tipping over when the second lifting component 53 moves the collection bottle 300 vertically up and down, please refer to [link to relevant documentation]. Figures 3 to 5The collection component 5 further includes a guide component 7, which includes a guide cylinder 71. The guide cylinder 71 is vertically mounted on the frame 1 and located at the collection station. The guide cylinder 71 is used to fit around the outer periphery of the collection bottle 300 to restrict the collection bottle 300 circumferentially. In use, when the second lifting component 53 lifts the collection bottle 300 vertically upward, the collection bottle 300 extends from the collection hole 511 into the guide cylinder 71, and drives the guide cylinder 71 to move vertically upward. When the second lifting component 53 moves vertically downward, the guide cylinder 71 can also move vertically downward with the collected item and return to its initial position. This arrangement can avoid interference with the weighing device 31 on the one hand, and guide the collection bottle 300 on the other hand to prevent it from tipping over.

[0056] Further, please see Figure 7 In this embodiment, the condenser 32 includes a condenser tube 321, a collection tube 322, and a water pumping device 323. The condenser tube 321 has a first cavity 3211 and a second cavity 3212 spaced apart inwards and outwards. The condenser tube 321 also has an inlet and an outlet connecting the first cavity 3211, and a steam inlet and a condensate outlet connecting the second cavity 3212. The steam inlet is connected to the steam outlet. The upper end of the collection tube 322 is connected to the condensate outlet, and the lower end of the collection tube 322 is used to extend into a collection bottle 300. The water pumping device 323 is connected to both the inlet and the outlet. In actual use, the water pumping device 323 injects coolant into the first cavity 3211 through the inlet, and the coolant cools the steam in the second cavity 3212. This configuration allows for rapid condensation of the steam.

[0057] Furthermore, since the collection tube 322 extends into the collection bottle 300, to avoid cross-contamination affecting the accuracy and precision of the results, please refer to [the relevant documentation / reference]. Figure 5 In this embodiment, the ammonia nitrogen distillation equipment 100 further includes a cleaning component 6, which is disposed on the frame 1 and is used to clean the collection pipe 322.

[0058] Furthermore, the cleaning assembly 6 includes a second drive assembly and a cleaning head. The cleaning head is movably mounted on the frame 1 along a first direction. The second drive assembly is connected to the cleaning head and is used to drive the cleaning head to move. In specific use, the second drive assembly drives the cleaning head to move towards the collection station, so that the cleaning head is aligned with the collection pipe 322. Then, the cleaning head sprays water to clean the collection pipe 322. After cleaning is completed, the second drive assembly drives the cleaning head to move away from the collection station to avoid interference with the collection bottle 300.

[0059] Furthermore, in order to better seal the distillation head 21 with the sample bottle 200, the distillation head 21 is elastically and telescopically mounted on the frame 1 in the vertical direction.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An ammonia nitrogen distillation apparatus, characterized in that, It includes: The machine frame is equipped with a collection station; An ammonia nitrogen separation device is mounted on the frame. The ammonia nitrogen separation device includes a distillation head, a first lifting assembly, and a steam generating assembly. The distillation head has a receiving cavity with an opening at the lower end. The distillation head also has a steam inlet and a steam outlet communicating with the receiving cavity. The first lifting assembly is located below the distillation head and is movably arranged in the vertical direction. The first lifting assembly is used to press a sample bottle against the receiving cavity from bottom to top through the opening, so that the sample bottle and the distillation head are sealed together. The steam generating assembly is connected to the steam inlet and is used to input a certain amount of steam into the sample bottle. A collection device is provided at the collection station. The collection device includes a weighing device and a condenser. The weighing device is used to place the collection bottle and weigh the collection bottle and the liquid inside it. The condenser is connected to the steam outlet and the collection bottle respectively. The condenser is used to condense the steam output from the distillation head into liquid and transport it into the collection bottle. The weighing device is movably mounted on the frame along a first direction, having a working state where it moves to the collection station and a clearance state where it moves away from the collection station. The ammonia nitrogen distillation equipment also includes a collection assembly, which includes a collection tray, a second drive mechanism, a second lifting assembly, and a clamping assembly. The collection tray is rotatably mounted on the frame along a vertical axis and is located below the weighing device. The collection tray has multiple collection holes, which are spaced circumferentially. The collection holes are used to place collection bottles. The second drive mechanism is connected to the collection tray. The second lifting assembly is movably mounted on the frame along a vertical direction and is located below the collection tray. The clamping assembly is located above the weighing device. In the clearance state, the second lifting assembly lifts the collection bottle, and the clamping assembly clamps the collection bottle. In the working state, the clamping assembly releases the collection bottle so that the collection bottle is placed on the weighing device.

2. The ammonia nitrogen distillation equipment according to claim 1, characterized in that, The steam generating assembly includes a liquid injector and a steam generator, which are connected in sequence. The liquid injector is used to input a certain amount of water into the steam generator, and the steam generator is used to vaporize the water into steam and deliver it to the distillation head.

3. The ammonia nitrogen distillation equipment according to claim 2, characterized in that, The injector includes an injection cylinder, a piston assembly, and a first drive assembly. The injection cylinder is mounted on the frame, and its lower end has an interface for connecting to its inner cavity. The interface is connected to the steam generator. The piston assembly is slidably mounted on the injection cylinder in a vertical direction, and its upper end extends out of the injection cylinder. The first drive assembly is connected to the upper end of the piston assembly and is used to drive the piston assembly to move.

4. The ammonia nitrogen distillation equipment according to claim 3, characterized in that, The steam generator includes a steam generating element and a heating element. The steam generating element is mounted on the frame and has a vaporization chamber and a first inlet and a first outlet communicating with the vaporization chamber. The first inlet is connected to the interface and the first outlet is connected to the steam inlet. The steam generating element also has a mounting hole located below the vaporization chamber. The heating element is located in the mounting hole and is used to vaporize the water in the vaporization chamber.

5. The ammonia nitrogen distillation equipment according to claim 4, characterized in that, The ammonia nitrogen separation device also includes a heat preservation cylinder, which is sleeved around the outer periphery of the distillation head to keep the distillation head warm. The distillation head is made of polytetrafluoroethylene.

6. The ammonia nitrogen distillation equipment according to claim 1, characterized in that, The ammonia nitrogen distillation equipment also includes a feeding assembly, which includes a sample tray and a first driving mechanism. The sample tray is rotatably mounted on the frame along a vertical axis and is located between the distillation head and the first lifting assembly. The sample tray has multiple sample holes, which are spaced apart circumferentially. The sample holes are used to place sample bottles. The first driving mechanism is connected to the sample tray and is used to drive the sample tray to rotate.

7. The ammonia nitrogen distillation equipment according to claim 1, characterized in that, The condenser includes a condenser tube, a collecting tube, and a water pumping device. The condenser tube has a first cavity and a second cavity spaced apart in the inward and outward directions. The condenser tube also has an inlet and an outlet connecting the first cavity, and a steam inlet and a condensate outlet connecting the second cavity. The steam inlet is connected to the steam outlet. The upper end of the collecting tube is connected to the condensate outlet, and the lower end of the collecting tube is used to extend into a collecting bottle. The water pumping device is connected to the inlet and the outlet respectively.

8. The ammonia nitrogen distillation equipment according to claim 7, characterized in that, The ammonia nitrogen distillation equipment also includes a cleaning component, which is located on the frame and is used to clean the collection tube.

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