Distillation apparatus and ammonium ion measuring device

Abstract

The application provides a distillation device and an ammonium ion detector, and relates to the technical field of detection. The distillation device comprises a heating device, a distillation flask, a distillation pipeline, a collection flask, a weighing device and a controller. The distillation flask is placed in the heating device. The first end of the distillation pipeline is in communication with the distillation flask. The collection flask is in communication with the second end of the distillation pipeline. The weighing device is located below the collection flask and is used for placing and weighing the collection flask. The controller is electrically connected with the heating device and the weighing device. The controller can receive the weight signal of the weighing device and control the heating device to stop working when the weight corresponding to the weight signal reaches a predetermined value. The technical scheme can sense the weight change of the collection flask through the weighing device, and automatically stop the heating device through control, so that the technical problem that an operator needs to monitor the collection flask all the time, wasting manpower and being prone to negligence in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building material detection, and in particular to a distillation device and an ammonium ion tester. BACKGROUND

[0002] When fly ash is used as a mixing material, in the alkaline environment of cement, ammonium salt will react with alkali to release ammonia, causing problems such as pungent ammonia odor, high air content of the mixture, and strength reduction during application. Therefore, it is particularly important to accurately and effectively detect the ammonia content of fly ash before using it as a building material.

[0003] Currently, the limit and test method for ammonium ion content in fly ash in GB / T 39701-2020 has been published and implemented. The standard specifies several methods for determining the ammonium ion content in fly ash, among which the distillation titration method is the most widely used. The existing distillation device is usually mixed by an operator to mix the sample and the solution uniformly, then transferred to a distillation flask, and then a sufficient amount of sodium hydroxide is added for distillation. The filtrate after distillation is absorbed by an excess of sulfuric acid solution. When the distillate reaches 200 mL, the distillation is stopped, and the solution after distillation is titrated with a standard sodium hydroxide titration solution. The ammonium ion content in the fly ash is calculated based on the milliliter number of the consumed standard sodium hydroxide titration solution.

[0004] According to the GB / T 39701-2020 standard, the distillate needs to reach 200 mL before titration. In actual operation, manual monitoring of the distillate is required to ensure that the distillate reaches 200 mL before the heating device is turned off. Therefore, an operator is required to monitor and operate throughout the test, which not only wastes human resources but also increases the risk of forgetting to turn off the heating device, causing the distillation flask to dry out and be damaged by dry burning, which not only damages the equipment but also poses a threat to the health of nearby personnel. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a distillation device and an ammonium ion tester, which solves the technical problem that a large amount of water leaks into the ammonium ion tester when the ground dust is sucked, causing damage to the filter element of the filter in the ammonium ion tester.

[0006] To solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the present application provides a distillation device, comprising: a heating device;

[0008] a distillation flask, the distillation flask being placed in the heating device;

[0009] a distillation pipeline, a first end of the distillation pipeline being in communication with the distillation flask;

[0010] a collection bottle, which is in communication with the second end of the distillation pipeline;

[0011] a weighing device, which is located at the lower side of the collection bottle and is used for placing and weighing the collection bottle; and

[0012] a controller, which is electrically connected with the heating device and the weighing device respectively, and is capable of receiving a weight signal of the weighing device and controlling the heating device to stop working when the weight corresponding to the weight signal reaches a predetermined value.

[0013] In some modified embodiments of the present application, a pressure relief pipeline is further included, one end of the pressure relief pipeline is in communication with the distillation tube, and the other end is in communication with the external atmosphere,

[0014] a first electromagnetic valve is arranged in the pressure relief pipeline, a second electromagnetic valve is arranged at the second end of the distillation pipeline, or the pressure relief pipeline and the second end of the distillation pipeline are in communication through a two-position three-way electromagnetic valve;

[0015] The first electromagnetic valve and the second electromagnetic valve, or the two-position three-way electromagnetic valve, are electrically connected with the controller, and the controller is capable of controlling the pressure relief pipeline to be in communication while the second end of the distillation pipeline is closed, or the second end of the distillation pipeline to be in communication while the pressure relief pipeline is closed.

[0016] In some modified embodiments of the present application, a liquid collection box is located at the lower side of the end of the pressure relief pipeline in communication with the external atmosphere.

[0017] In some modified embodiments of the present application, the second end of the distillation pipeline extends into the collection bottle and is located in the liquid in the collection bottle.

[0018] In some modified embodiments of the present application, the weighing device comprises:

[0019] a placing part, which is located at the lower side of the collection bottle and is used for placing the collection bottle;

[0020] a gravity sensor, which is located at the lower side of the placing part, and is electrically connected with the controller, and is used for weighing the collection bottle and transmitting a weight signal to the controller.

[0021] In some modified embodiments of the present application, the heating device comprises:

[0022] a heat-conducting part, which is a placing flat plate or a semi-enclosing jacket, and is used for fixing and heating the distillation bottle; and

[0023] a heating part, which is located at the lower side of the heat-conducting part, and is an electric heating device, and is electrically connected with the controller, and the controller is capable of controlling the heating part to be turned on or off.

[0024] In some modified embodiments of the present application, an alarm device is electrically connected with the controller, and the controller is capable of controlling the alarm device to emit an alarm sound or turn on an indicator light.

[0025] In some modified embodiments of the present application, the condensing device comprises a condensing pipe, a water tank, a water pump and a circulating water pipe.

[0026] The condensing pipe is in communication with the distillation pipe, and the condensing pipe extends longitudinally. The water inlet and the water outlet of the circulating water pipe are in communication with the water tank. The main body of the circulating water pipe is corrugated and located in the condensing pipe. The water pump is located in the water tank and is in communication with the circulating water pipe. The water pump is electrically connected with the controller.

[0027] In some modified embodiments of the present application, the condensing device further comprises:

[0028] The temperature sensor is located at the bottom of the water tank and is electrically connected with the controller.

[0029] The controller is configured to receive the temperature signal of the temperature sensor and to alarm when the temperature value corresponding to the temperature signal reaches a predetermined value.

[0030] The second aspect of the present application provides an ammonium ion detector, comprising the foregoing distillation device.

[0031] Compared with the prior art, the distillation device provided by the present application can monitor the mass of the collection bottle through the weighing device, and receive the weight signal of the weighing device through the controller. When the weight value corresponding to the weight signal reaches a predetermined value, the heating device is automatically controlled to stop working, and it is no longer necessary to manually monitor the liquid in the collection bottle at all times. This can free up manpower and save human resources. Moreover, it will not cause the heating device to continue heating due to human negligence, causing the liquid in the distillation bottle to dry out and causing the distillation bottle to be damaged or even burst. This not only causes damage to the equipment, but also poses a threat to the personal health of surrounding personnel. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and other objects, features and advantages of the example embodiments of the present application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein like or corresponding elements show like or corresponding parts, by referring to which; and in which:

[0033] Figure 1 is a structural schematic diagram of the embodiments disclosed by the present application.

[0034] BRIEF DESCRIPTION OF DRAWINGS 1, heating device; 2, distillation flask; 3, distillation pipe; 4, collection bottle; 5, weighing device; 6, controller; 7, pressure relief pipe; 8, two-position three-way electromagnetic valve; 9, condensing device. DETAILED DESCRIPTION

[0035] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure can be embodied in various forms without being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0036] It should be noted that the technical or scientific terms used in the present application should be understood as the common meaning understood by those skilled in the art unless otherwise specified.

[0037] Embodiment One

[0038] With reference to the accompanying drawings, Figure 1 the embodiment of the present application proposes a distillation device, which comprises: a heating device 1;

[0039] a distillation flask 2, which is placed in the heating device 1;

[0040] a distillation pipeline 3, a first end of which is in communication with the distillation flask 2;

[0041] a collection flask 4, which is in communication with a second end of the distillation pipeline 3;

[0042] a weighing device 5, which is located below the collection flask 4 and is used to place and weigh the collection flask 4; and

[0043] a controller 6, which is electrically connected to the heating device 1 and the weighing device 5, respectively, and can receive a weight signal of the weighing device 5 and control the heating device 1 to stop working when the weight corresponding to the weight signal reaches a predetermined value.

[0044] Specifically, the heating device 1 can be an electric heating device, the distillation bottle 2 can be a conical flask placed on the top side of the heating device 1, the distillation pipeline 3 can be made of a glass tube, the first end of the distillation pipeline 3 is in communication with the distillation bottle 2, the second end of the distillation pipeline 3 faces the lower side and is in communication with the collection bottle 4, the weighing device 5 can weigh the weight of the collection bottle 4, the specific structure of the weighing device 5 is described below, the controller 6 is electrically connected with the heating device 1 and the weighing device 5 respectively, the controller 6 includes a PLC single-chip microcomputer and a touch display screen, can receive the weight signal of the weighing device 5 and process the weight signal, and convert the weight signal into a corresponding weight value, when the weight of the collection bottle 4 reaches a predetermined value, the controller 6 can control the heating device 1 to stop heating, so that it is no longer necessary for an operator to observe the liquid in the collection bottle 4 and control the heating device 1 all the time, and the controller 6 can automatically turn off the heating device 1 according to the weight change of the collection bottle 4, which can effectively save human resources and avoid the negligence caused by manual operation, so that the heating device 1 works all the time, the solution in the distillation bottle 2 is burned dry, the distillation bottle 2 is damaged by dry burning, and even explodes, which not only damages the equipment, but also threatens the personal health of the surrounding personnel.

[0045] According to the above list, the embodiment of the present application proposes a distillation device, which can monitor the mass of the collection bottle 4 through the weighing device 5, and receive the weight signal of the weighing device 5 through the controller 6, and automatically control the heating device 1 to stop working when the weight value corresponding to the weight signal reaches a predetermined value, so that it is no longer necessary for a person to monitor the liquid in the collection bottle 4 all the time, which can liberate manpower, save human resources, and will not cause the heating device 1 to work all the time due to human negligence, so that the liquid in the distillation bottle 2 is burned dry, the distillation bottle 2 is damaged or even explodes, which not only damages the equipment, but also threatens the personal health of the surrounding personnel.

[0046] In some embodiments, reference is made to the accompanying Figure 1 In specific implementation, it further includes: a pressure relief pipeline 7, one end of the pressure relief pipeline 7 is in communication with the distillation pipeline, and the other end is in communication with the external atmosphere,

[0047] The first electromagnetic valve is arranged in the pressure relief pipeline 7, the second end of the distillation pipeline 3 is provided with a second electromagnetic valve, or the pressure relief pipeline 7 and the second end of the distillation pipeline 3 are communicated through a two-position three-way electromagnetic valve 8;

[0048] The first electromagnetic valve and the second electromagnetic valve, or the two-position three-way electromagnetic valve 8 are electrically connected with the controller 6, and the controller 6 can control the pressure relief pipeline 7 to be communicated at the same time that the second end of the distillation pipeline 3 is closed, or the second end of the distillation pipeline 3 to be communicated at the same time that the pressure relief pipeline 7 is closed.

[0049] Specifically, when the distillation operation is performed, the controller 6 controls the first electromagnetic valve to be closed, the second electromagnetic valve to be opened, or controls the pressure relief pipeline 7 and the distillation pipeline 3 through the two-position three-way electromagnetic valve 8, so that the second end of the distillation pipeline 3 is communicated with the collection bottle 4 while the pressure relief pipeline 7 is closed; after the distillation operation is completed, the controller 6 controls the heating device 1 to stop heating while controlling the first electromagnetic valve to be opened, the second electromagnetic valve to be closed, or controlling the pressure relief pipeline 7 and the distillation pipeline 3 through the two-position three-way electromagnetic valve 8, so that the second end of the distillation pipeline 3 is disconnected from the collection bottle 4 while the pressure relief pipeline 7 is communicated, which can relieve the pressure of the distillation bottle 2 and the distillation pipeline 3, and avoid the backflow of the liquid in the collection bottle 4 from the distillation pipeline 3 to the distillation bottle 2, which not only affects the test results, but also causes the distillation bottle 2 to burst, which seriously threatens the personal safety of the surrounding workers.

[0050] In some embodiments, reference is made to the accompanying drawings that form a part of this disclosure Figure 1 In specific implementation, the liquid collecting box is located at the lower side of the end of the pressure relief pipeline 7 communicated with the external atmosphere.

[0051] Specifically, the liquid collecting box can be a rectangular shell with an opening at the top side, which can collect the liquid flowing out of the pressure relief pipeline 7, and the operator can concentrate on the treatment of the waste liquid in the liquid collecting box after a period of time, avoiding the pollution of the liquid flowing out of the pressure relief pipeline 7 to the instrument or the working environment.

[0052] In some embodiments, reference is made to the accompanying drawings that form a part of this disclosure Figure 1 In specific implementation, the second end of the distillation pipeline 3 extends into the collection bottle 4 and is located in the liquid in the collection bottle 4.

[0053] Specifically, the second end of the distillation pipeline 3 is located in the liquid in the collection bottle 4, which can make the gas and liquid discharged from the distillation pipeline 3 fully contact with the liquid in the collection bottle 4, avoiding the gas generated by distillation from overflowing directly from the bottle opening of the collection bottle 4 without fully contacting with the liquid in the collection bottle 4, which affects the experimental results.

[0054] In some embodiments, reference is made to the accompanying drawings that form a part of this disclosure Figure 1 In specific implementation, the weighing device 5 includes:

[0055] The placing part is located at the lower side of the collection bottle 4 and is used for placing the collection bottle 4;

[0056] The gravity sensor is located at the lower side of the placing part, the gravity sensor is electrically connected with the controller 6, and the gravity sensor is used for weighing the weight of the collection bottle 4 and transmitting the weight signal to the controller 6.

[0057] Specifically, the weighing device 5 comprises a placing part and a gravity sensor, the placing part can be a horizontally placed plate body, which can support the collection bottle 4, the gravity sensor is arranged on the lower side of the placing part, can measure the mass of the collection bottle 4 by sensing the gravity of the placing part, and transmit the gravity signal to the controller 6, the controller 6 processes the gravity signal and converts it into a corresponding gravity value, and then measures the weight change of the collection bottle 4 according to the gravity value change, and further judges the liquid amount in the collection bottle 4; the change of the liquid amount in the collection bottle 4 is monitored by the electrical device instead of the liquid level in the collection bottle 4 in the prior art which is judged by manual naked eye, which is not only more accurate, but also can effectively save manpower, and the operator does not need to monitor the test instrument all the time.

[0058] In some embodiments, reference is made to the accompanying Figure 1 In specific implementation, the heating device 1 comprises:

[0059] The heat-conducting part is a placing flat plate or a semi-enclosing sleeve, which is used for fixing and heating the distillation bottle 2; and

[0060] The heating part is arranged on the lower side of the heat-conducting part, and is an electric heating device, which is electrically connected with the controller 6, and the controller 6 can control the heating part to start or stop.

[0061] Specifically, the heating device 1 is electric heating, and comprises the heat-conducting part and the heating part, the heat-conducting part can be a horizontally placed heat-conducting plate, or a semi-enclosing sleeve around the bottom of the distillation bottle 2, but the height of the sleeve will not exceed the height of the liquid level on the inner side of the distillation bottle 2, so as to avoid heating damage to the distillation bottle 2, and the heat-conducting part can be used for bearing the distillation bottle 2, and the heating part can be an electric resistance heating wire, which is arranged on the lower side of the heat-conducting plate, and can improve the heat of the heat-conducting plate to heat the distillation bottle 2; the heating part is connected with the control module, and through the control module, the start and stop of the heating part can be controlled, and the power of the heating part can be controlled, and the heating effect of the heating part can be controlled.

[0062] In some embodiments, reference is made to the accompanying Figure 1 In specific implementation, the heating device 1 comprises:

[0063] Specifically, the alarm device is electrically connected with the controller 6, and can be a buzzer alarm or a red indicator light, and the controller 6 can control the alarm device to alarm when the distillation operation is completed and the heating device 1 stops working, so as to remind the operator that the distillation has been completed and the next test can be started, and the collection bottle 4 containing the collected liquid is prevented from being placed for a long time, which affects the final test result.

[0064] In some embodiments, reference is made to the accompanying Figure 1In specific implementation, the condensing device 9 further comprises a condensing pipe, a water tank, a water pump and a circulating water pipe.

[0065] The condensing pipe is in communication with the distillation pipe 3 and extends longitudinally, the water inlet and the water outlet of the circulating water pipe are in communication with the water tank, the main body of the circulating water pipe is corrugated and located in the condensing pipe, the water pump is located in the water tank and in communication with the circulating water pipe, and the water pump is electrically connected with the control module.

[0066] Specifically, the cooling module can be a water cooling device, which comprises a water tank, a water pump and a circulating water pipe. The water tank stores circulating water for cooling. The circulating water pipe has a corrugated main body, a water inlet and a water outlet. The water inlet of the circulating water pipe is in communication with the water pump and is placed at the bottom of the water tank, so that the circulating water in the water tank can enter the circulating water pipe. The main body of the circulating water pipe is located in the condensing pipe, which can effectively reduce the temperature of the gas in the condensing pipe, so that the steam in the condensing pipe can be liquefied by cooling and then drop into the collection bottle 4. The water outlet of the circulating water pipe is in communication with the top of the water tank, so that the circulating water can be poured back into the water tank. The cooling module can rapidly reduce the temperature of the gas in the condensing pipe, so that the steam can be liquefied by cooling and then drop into the collection bottle 4. Compared with the heat exchange between the condensing pipe and the external air, the efficiency is higher, and the length of the condensing pipe does not need to be very long. The condensing pipe can liquefy the gas generated by distillation, so that it can drop into the collection bottle 4 more quickly and react with the solution in the collection bottle 4 better.

[0067] In some embodiments, reference is made to the accompanying drawings Figure 1 In specific implementation, the condensing device 9 further comprises:

[0068] The temperature sensor is located at the bottom of the water tank and is electrically connected with the controller 6.

[0069] The controller 6 is configured to receive the temperature signal of the temperature sensor and alarm when the temperature value corresponding to the temperature signal reaches a predetermined value.

[0070] Specifically, the temperature sensor can be PT100, which is located at the bottom of the water tank and can monitor the temperature of the circulating water in the water tank for cooling. The control module can receive the temperature signal of the temperature sensor and process the temperature signal to convert it into a temperature value. When the distillation device needs to be continuously used and the temperature of the circulating water is relatively high, the control module can alarm in time through a warning sound or an indicator light to prompt the operator to change the water or stop the test.

[0071] Embodiment two

[0072] Reference is made to the accompanying drawings Figure 1 Embodiment two of the present application proposes an ammonium ion measuring instrument, which comprises the aforementioned distillation device.

[0073] Specifically, the ammonium ion detector in the present application can detect the weight of the collection bottle 4 according to the weighing device 5, automatically stop the heating device 1 when the weight reaches the predetermined value according to the change of the weight of the collection bottle 4, switch the distillation pipeline 3 and the pressure relief pipeline 7 at this time to avoid backflow, and then remind the operator to handle the collection bottle 4 through the alarm device, so that the test process no longer needs the operator to watch all the time, effectively saving manpower, and also avoiding negligence caused by manual operation and damaging equipment and instruments.

[0074] In the specific operation, first, 10g of sample (take fly ash sample as an example, record the sample weight m2) is weighed to 0.01g, and then about 210mL of distilled water is measured by a measuring cylinder, which is slowly poured into the beaker, and then the distilled water and fly ash mixture is poured into a 500mL distillation flask 2 (a funnel can be used to prevent fly ash particles from sticking to the wall of the distillation flask 2 and to prevent the solution from overflowing from the side tube), and the beaker and funnel are washed twice with distilled water, and the total amount of washing liquid is not more than 30mL, and the washing liquid is combined into the distillation flask 2.

[0075] Taking the determination of ammonium ion content in fly ash as an example, the user sets the instrument parameters as follows.

[0076] The heating time of the heating device 1 is set by the controller 6: set to 45min (or 50 or 60min can also be set);

[0077] The preset mass is set by the controller 6: the target mass is 180g (according to the standard distillation liquid of 200mL, 180mL needs to be distilled out except 20mL of sulfuric acid, which is converted to 180g in mass), and after clicking the start button, the existing mass on the skinless balance will be automatically removed, and when the balance senses the mass of 180g, the heating will be automatically stopped and the anti-backflow valve will be opened;

[0078] The heating power of the heating device 1 is adjusted by the controller 6: adjusted to more than 80%.

[0079] After adjusting the above parameters, a clean and dry funnel is inserted into the distillation flask 2, and then 0.2g to 0.8g of sodium hydroxide is added (the amount of sodium hydroxide added can be determined according to the pH value of the fly ash and distilled water mixture, and the alkaline property of the mixture is confirmed), a small amount of distilled water is used to rinse the funnel, the cover of the distillation flask 2 is immediately closed, the start button is clicked, and the timing button is clicked, and the instrument automatically enters the heating distillation process.

[0080] The distillation liquid reaches the set mass (180g) or the timing reaches the set value (45min) to automatically stop heating and ring to prompt the end of the test, and the distillation liquid reaching the set mass is preferred.

[0081] The above distillation solution is back-titrated with a standard titration solution of sodium hydroxide until the solution color changes from bright purple to gray-green, and the volume of the standard titration solution of sodium hydroxide consumed (V2) is recorded to calculate the content of ammonium ions.

[0082] It should be noted that, in the description of the present specification, the orientation or positional relationship indicated by the terms "upper", "lower" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0083] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0084] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. Distillation apparatus, characterized in that The device comprises: a heating device; a distillation flask placed in the heating device; a distillation tube, the first end of which is in communication with the distillation flask; a collection flask in communication with the second end of the distillation tube; a weighing device located under the collection flask for placing and weighing the collection flask; and a controller electrically connected to the heating device and the weighing device, which can receive the weight signal of the weighing device and control the heating device to stop working when the weight corresponding to the weight signal reaches a predetermined value. The device further comprises: a pressure relief tube, one end of which is in communication with the distillation tube and the other end of which is in communication with the external atmosphere, a first electromagnetic valve provided in the pressure relief tube, a second electromagnetic valve provided at the second end of the distillation tube, or the pressure relief tube and the second end of the distillation tube are connected through a two-position three-way electromagnetic valve; wherein the first electromagnetic valve and the second electromagnetic valve, or the two-position three-way electromagnetic valve are electrically connected to the controller, and the controller can control the pressure relief tube to be connected at the same time as the second end of the distillation tube being closed, or the second end of the distillation tube being connected at the same time as the pressure relief tube being closed; During the distillation operation, the controller controls the first electromagnetic valve to be closed, the second electromagnetic valve to be opened, or controls the pressure relief tube and the distillation tube through the two-position three-way electromagnetic valve, so that the second end of the distillation tube is in communication with the collection flask at the same time as the pressure relief tube being closed; after the distillation operation is completed, the controller controls the heating device to stop heating at the same time as the first electromagnetic valve being opened, the second electromagnetic valve being closed, or the pressure relief tube and the distillation tube being controlled through the two-position three-way electromagnetic valve, so that the second end of the distillation tube is disconnected from the collection flask at the same time as the pressure relief tube being connected.

2. The distillation device according to claim 1, wherein a liquid collection box is located under the end of the pressure relief tube in communication with the external atmosphere.

3. The distillation device according to claim 1, wherein the second end of the distillation tube extends into the collection flask and is located in the liquid in the collection flask.

4. The distillation device according to claim 1, wherein the weighing device comprises: a placing part located under the collection flask for placing the collection flask; a gravity sensor located under the placing part, which is electrically connected to the controller, and which is used to weigh the collection flask and transmit the weight signal to the controller.

5. The distillation device according to claim 1, wherein the heating device comprises: a heat conduction part, which is a placing flat plate or a semi-enclosed jacket, for fixing and heating the distillation flask; and a heating part located under the heat conduction part, which is an electric heating device, which is electrically connected to the controller, and which can be controlled by the controller to be turned on or off. The device further comprises:

6. The distillation apparatus of claim 1, wherein, an alarm device electrically connected to the controller, which can be controlled by the controller to emit an alarm sound or turn on an indicator light. The device further comprises:

7. The distillation apparatus of claim 1, wherein, ​ The condensing device comprises a condensing pipe, a water tank, a water pump and a circulating water pipe. The condensing pipe is communicated with the distillation pipe, and the condensing pipe extends longitudinally; the water inlet and the water outlet of the circulating water pipe are communicated with the water tank; the main body of the circulating water pipe is corrugated and located in the condensing pipe; the water pump is located in the water tank and communicated with the circulating water pipe; and the water pump is electrically connected with the controller.

8. The distillation device according to claim 7, characterized in that, The condensing device further comprises: a temperature sensor located at the bottom of the water tank and electrically connected with the controller; The controller is configured to receive the temperature signal of the temperature sensor and to alarm when the temperature value corresponding to the temperature signal reaches a predetermined value.

9. An ammonium ion measuring device characterized by comprising: The distillation device comprises: any one of claims 1-8.

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