Intelligent sample digestion integrated workstation and control method thereof

Abstract

The present invention provides an intelligent sample digestion integrated workstation and a control method thereof, and relates to the field of solid sample testing, the intelligent sample digestion integrated workstation comprises: a digestion device having an accommodating space inside, the digestion device being used for injecting an acid solution into a test tube; the acid gas recovery equipment is directly communicated with the test tube through a gas guide tube and is used for recovering volatile acid gas; wherein the acid gas recovery equipment comprises a recovery bottle, the interior of the recovery bottle is provided with a containing cavity, the recovery bottle is provided with a medium inlet, a medium outlet, an acid gas inlet and an acid liquid outlet, the medium inlet is communicated with the medium outlet, and the acid gas inlet is communicated with the acid liquid outlet; the condensation pipe is positioned in the accommodating space, and the condensation pipe is communicated with the acid gas inlet and the acid liquid outlet; the medium inlet is used for allowing cooling liquid to flow into the containing space, the medium outlet is used for allowing the cooling liquid to flow out of the containing space, and heat conduction can be conducted between acid gas in the condensation pipe and the cooling liquid in the containing space. According to the intelligent sample digestion integrated workstation, the workload of a recovery device is reduced.

Description

Technical Field

[0001] The invention relates to the field of solid sample testing, and in particular to a sample intelligent digestion integrated workstation and a control method thereof. Background Art

[0002] Before the sample is tested, it is necessary to digest the sample in order to analyze the sample later. The sample is contained in a test tube and the test tube is contained in a test tube rack. The sample is digested by injecting acid into the test tube. During the process of acid digestion of the sample, the acid will evaporate to form acid gas. In order to reduce the impact on the environment, the acid gas needs to be recovered and the recovered gas is passed into a neutralization device. The recovery rate of acid gas in the related sample intelligent digestion integrated workstation is low, resulting in a large amount of acid gas remaining in the gas passed into the neutralization device, resulting in a heavy workload for the neutralization device and high maintenance costs for the neutralization device. Summary of the invention

[0003] The present invention provides a sample intelligent digestion integrated workstation and a control method thereof, which are used to solve the technical problem of how to improve the recovery rate of acid gas and thus reduce the maintenance cost of a neutralization device.

[0004] The embodiment of the present invention provides a sample intelligent digestion integrated workstation, which includes: a digestion device, which has a storage space inside, the storage space is used to store a test tube containing the sample, and the digestion device is used to inject acid into the test tube to digest the sample; an acid gas recovery device, which is directly connected to the test tube through an air guide tube and is used to recover the acid gas volatilized in the test tube; wherein the acid gas recovery device includes: a recovery bottle, which has a storage cavity inside, the recovery bottle has a medium inlet, a medium outlet, an acid gas inlet and an acid liquid outlet, the medium inlet is connected to the medium outlet, and the acid gas inlet is connected to the acid liquid outlet; a condenser, which is located in the storage space, and the condenser connects the acid gas inlet and the acid liquid outlet; wherein the medium inlet is used to supply coolant to flow into the storage space, the medium outlet is used to supply the coolant to flow out of the storage space, and the acid gas in the condenser can conduct heat conduction with the coolant in the storage space.

[0005] In some embodiments, the recovery bottle also includes an acid gas outlet; wherein the acid gas recovery equipment also includes: an air pump, connected to the condenser through the acid gas outlet, and the air pump is used to suck the acid gas into the condenser; a switch valve, located in the air duct, used to control the connection and blockage between the air duct and the test tube.

[0006] In some embodiments, the condenser includes: a straight portion extending in a vertical direction, the straight portion being connected to the acid liquid outlet, and the acid liquid outlet is located at the bottom of the straight portion; a spiral portion surrounding the outside of the straight portion and extending along a spiral curve, the spiral portion being connected to the acid gas inlet and the straight portion.

[0007] In some embodiments, the acid gas recovery equipment further includes: a neutralization adsorption structure, located in the accommodating space; wherein the condenser further includes an exhaust port, the exhaust port being connected to the neutralization adsorption structure; the exhaust port has an exhaust valve, and the exhaust valve is used to control the opening and closing of the exhaust port.

[0008] In some embodiments, the acid gas recovery device further includes: a neutralization adsorption structure located in the containing space, and the neutralization adsorption structure is connected to the gas pump.

[0009] In some embodiments, the medium inlet and the medium outlet are both in communication with the accommodating space, the accommodating space is used to directly accommodate the coolant, and the outer surface of the condenser tube is used to directly contact the coolant.

[0010] In some embodiments, the acid gas recovery device further includes: a cooling pipe, wherein the cooling pipe is located in the accommodating space and connects the medium inlet and the medium outlet, and an outer surface of the cooling pipe contacts an outer surface of the condenser pipe.

[0011] An embodiment of the present invention also provides a control method for a sample intelligent digestion integrated workstation, which is applied to the sample intelligent digestion integrated workstation as described in the above embodiment. The acid gas recovery equipment in the sample intelligent digestion integrated workstation also includes an air pump and a switch valve. The control method includes: controlling the digestion equipment to inject acid into the test tube so that the acid digests the sample, and testing the sample after digestion; sending a control signal to the switch valve to keep the air pressure in the test tube within a preset air pressure range.

[0012] In some embodiments, sending a control signal to the switch valve to keep the air pressure in the test tube within a preset air pressure range includes: periodically sending a control signal to the switch valve to close the switch valve for a second time period after the switch valve is opened for a first time period.

[0013] In some embodiments, the sample intelligent digestion integrated workstation also includes a pressure sensor capable of obtaining the air pressure in the test tube, and sending a control signal to the switch valve to keep the air pressure in the test tube within a preset air pressure range includes: obtaining the air pressure data in the test tube by the pressure sensor; when the air pressure data is greater than the upper limit of the air pressure range, controlling the switch valve to open, and when the air pressure data is less than the lower limit of the air pressure range, controlling the switch valve to close.

[0014] The embodiment of the present invention provides a sample intelligent digestion integrated workstation, which includes a digestion device and an acid gas recovery device. The acidolysis device has a accommodating space inside, a test tube containing a sample is located in the accommodating space and is injected with acid by the digestion device, so that the acid digests the sample in the test tube. At the same time, the acid gas recovery device is directly connected to the test tube through an air guide tube, so that the acid gas in the test tube directly enters the acid gas recovery device, wherein the acid gas recovery device includes: a recovery bottle with a accommodating cavity inside, and a condenser located in the condensation space; wherein the recovery bottle has a medium inlet, a medium outlet, an acid gas inlet and an acid liquid outlet, the condenser connects the acid gas inlet and the acid liquid outlet, the coolant can flow into the accommodating cavity from the medium inlet, and the acid gas can flow into the acid gas inlet from the acid gas inlet The condenser tube condenses to form acid liquid after heat conduction with the coolant in the containing chamber, and flows out from the acid liquid outlet. Since the acid gas is located in the condenser tube, compared with directly passing the acid gas into the containing chamber, more acid gas can exchange heat with the coolant through heat conduction, so that the acid gas can be more thoroughly cooled by the coolant and condensed into acid liquid, thereby improving the recovery rate of the acid gas. Moreover, the coolant with a temperature rise after heat exchange with the acid gas flows out of the containing chamber from the medium outlet, which can keep the coolant in the containing chamber at a relatively low temperature, thereby further accelerating the cooling speed of the acid gas, thereby further increasing the recovery rate of the acid gas, reducing the acid gas content in the gas passed into the neutralization equipment, reducing the workload of the neutralization equipment, and thus reducing the maintenance cost of the neutralization equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a sample intelligent digestion integrated workstation provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a first type of acid gas recovery equipment in a sample intelligent digestion integrated workstation provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a second acid gas recovery device in a sample intelligent digestion integrated workstation provided in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a third type of acid gas recovery equipment in a sample intelligent digestion integrated workstation provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a fourth type of acid gas recovery equipment in a sample intelligent digestion integrated workstation provided in an embodiment of the present invention; Figure 6 A schematic diagram of the assembly of a condenser and a cooling tube in a sample intelligent digestion integrated workstation provided in an embodiment of the present invention; Figure 7 A schematic flow chart of a control method for a first sample intelligent digestion integrated workstation provided by an embodiment of the present invention; Figure 8 A schematic flow chart of a control method for a second sample intelligent digestion integrated workstation provided by an embodiment of the present invention; Fig. 9 A schematic flow chart of a control method for a third sample intelligent digestion integrated workstation provided in an embodiment of the present invention.

[0016] Description of Reference Numerals 1. Sample intelligent digestion integrated workstation; 10. Digestion equipment; 11. Accommodation space; 20. Acid gas recovery equipment; 21. Recovery bottle; 210. Accommodation chamber; 211. Medium inlet; 212. Medium outlet; 213. Acid gas inlet; 214. Acid liquid outlet; 215. Acid gas outlet; 22. Condenser; 221. Exhaust port; 222. Exhaust pipe; 223. Exhaust valve; 224. Straight part; 225. Spiral part; 226. Expansion part; 23. Air pump; 24. Switch valve; 25. Neutralization adsorption structure; 26. Cooling pipe; 30. Air guide pipe. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] The various specific technical features in the various embodiments described in the specific implementation methods can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the present invention will not be described separately.

[0019] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0020] In addition, it should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the following description, the terms "first\second\..." involved are merely used to distinguish different objects, and do not indicate that the objects have the same or related points. It should be understood that the directions described by the directions nouns such as "above", "below", "inside" and "outside" involved are all directions in normal use.

[0021] In the following specific embodiments, the sample intelligent digestion integrated workstation can be applied to the testing of different solid samples. For example, the sample intelligent digestion integrated workstation can be used for the testing of gold ore. For example, the sample intelligent digestion integrated workstation can also be used for the testing of graphite ore. For the sake of convenience, the following uses the sample intelligent digestion integrated workstation for testing graphite ore as an example to illustrate the structure and function of the sample intelligent digestion integrated workstation.

[0022] In some embodiments, Figure 1 As shown, the sample intelligent digestion integrated workstation 1 includes: a digestion device 10, an acid gas recovery device 20 and an air duct 30. The digestion device 10 has a storage space 11 inside, and the storage space 11 is used to accommodate a test tube containing a sample. The digestion device 10 is used to inject acid into the test tube so that the acid digests the sample in the test tube, so as to test the digested sample. Heat will be released during the reaction between the acid and the sample, and the acid will volatilize under the action of heat to form acid gas. In order to reduce the impact of acid gas on the external environment, the acid gas needs to be collected and then the remaining air after collection is neutralized. The higher the recovery rate of acid gas by the acid gas recovery device, the lower the acid gas content in the remaining air, and the smaller the workload of the neutralization treatment device. Among them, the recovery rate of acid gas can be understood as the proportion of acid gas condensed to form acid liquid in the total amount of acid gas sucked into the acid gas recovery device.

[0023] The acid gas recovery device 20 is directly connected to the test tube injected with acid liquid in the accommodation space 11 through the air duct 30 (the air duct 30 is not shown in the partial figure in the accommodation space 11). It can be understood that one end of the air duct 30 extends into the accommodation space 11 and is directly connected to the test tube injected with acid liquid in the accommodation space 11, and the other end of the air duct 30 is connected to the acid gas recovery device 20, so that the acid gas in the test tube is directly passed into the acid gas recovery device 20. Exemplarily, the tube mouth of the test tube in the accommodation cavity 210 is sealed by the test tube cover, and the test tube cover has an air guide hole for inserting the air duct 30. The tube mouth of the test tube is sealed by the test tube cover to prevent the acid gas from leaking into the accommodation space 11. By providing an air guide hole connected to the air duct 30, the acid gas in the test tube can be directly passed from the air duct 30 to the acid gas recovery device 20. It should be noted that the air duct 30 can be a part of the sample intelligent digestion integrated workstation, that is, the sample intelligent digestion integrated workstation 1 is equipped with the air duct 30, so that the user does not need to prepare the air duct 30 by themselves; the air duct 30 may not be a part of the sample intelligent digestion integrated workstation 1, that is, the sample intelligent digestion integrated workstation 1 is not equipped with the air duct 30, and the user can configure the air duct according to their needs.

[0024] Among them, Figure 2 As shown, the acid gas recovery device 20 includes: a recovery bottle 21 and a condenser 22. The recovery bottle 21 has a receiving chamber 210, and the recovery bottle has a medium inlet 211, a medium outlet 212, an acid gas inlet 213 and an acid liquid outlet 214. The medium inlet 211 is connected to the medium outlet 212, and the acid gas inlet 213 is connected to the acid liquid outlet 214.

[0025] The condenser 22 is connected to the acid gas inlet 213 and the acid liquid outlet 214. The acid gas flows into the condenser 22 from the acid gas inlet 213, wherein the acid gas inlet 213 can be directly connected to the air guide tube 30. The recovery bottle 21 can also have an internal passage, through which the acid gas inlet 213 and the air guide tube 30 are indirectly connected. After the acid gas enters the condenser 22, it can conduct heat with the coolant located in the accommodating chamber 210. After the acid gas exchanges heat with the coolant by heat conduction, the temperature of the acid gas decreases, thereby condensing in the condenser 22 to form acid liquid. The formed acid liquid flows out of the condenser 22 from the acid liquid outlet 214 and is stored, thereby realizing the recovery of the acid gas. Moreover, the coolant whose temperature is increased by heat exchange with the acid gas flows out of the accommodating chamber 210 from the medium outlet, thereby maintaining a low temperature in the accommodating chamber 210 to increase the condensation speed of the acid gas. There are many ways to achieve heat conduction between the acid gas and the coolant, as shown in the following example. The medium inlet 211 and the medium outlet 212 are both connected to the accommodating chamber 210, the coolant can be directly accommodated in the accommodating chamber 210, and the coolant located in the accommodating chamber 210 is in direct contact with the outer surface of the condenser 22, so that the acid gas in the condenser 22 can be heat-conducted with the coolant; optionally, the acid gas recovery equipment 20 also includes a cooling pipe, which is located in the accommodating chamber 210 and connected to the medium inlet 211 and the medium outlet 212. The coolant enters the accommodating chamber 210 but the accommodating chamber 210 does not directly accommodate the coolant, and the heat conduction between the acid gas and the coolant is achieved through the contact between the cooling pipe and the condenser 22.

[0026] The acid gas recovery equipment in the relevant sample intelligent digestion integrated workstation directly passes the acid gas into the containing cavity of the recovery bottle and arranges a cooling pipe for the flow of coolant in the containing cavity. Only a small part of the acid gas in the containing cavity can directly contact the outer surface of the cooling pipe, thereby being quickly cooled by heat conduction, while most of the other acid gas can only be indirectly cooled by heat convection or heat radiation, resulting in a slow condensation rate of the acid gas; the acid gas recovery equipment provided in this embodiment passes the acid gas into the condensing pipe, and most of the acid gas concentrated in the condensing pipe can be heat-conducted with the coolant in the containing cavity 210, so that the acid gas can be more thoroughly cooled into acid liquid, thereby improving the recovery rate of the acid liquid.

[0027] It should be noted that the acid gas in the relevant sample intelligent digestion integrated workstation evaporates from the test tube into the storage space of the digestion equipment, and the acid gas recovery equipment then extracts and recovers the air mixed with the acid gas as a whole. The acid gas recovery equipment needs to recover and condense a large amount of gas, so it is necessary to pass the gas containing a lower concentration of acid gas into the storage chamber of a large-volume recovery bottle, and the storage chamber directly accommodates the gas containing acid gas. If these gases containing a lower concentration of acid gas are passed into the condenser, the volume of the gas containing acid gas that can be processed by a single condensation will be reduced, affecting the speed of acid gas recovery. The sample intelligent digestion integrated workstation provided in this embodiment will The acid gas is directly introduced into the acid gas recovery equipment from the test tube. The acid gas recovery equipment 20 only needs to condense the acid gas volatilized in the test tube, and there is no need to collect a large amount of air in the accommodating space 11 of the digestion equipment 10, thereby reducing the volume of the gas that needs to be processed by the acid gas recovery equipment 20, and the recovered gas contains a higher concentration of acid gas. It is on this basis that the applicant further thought that since the amount of gas containing acid gas that needs to be processed is small and the concentration of acid gas is high, the acid gas volatilized in the test tube can be introduced into the condenser, thereby making the acid gas recovery more thorough and improving the acid gas recovery rate without affecting the amount of acid liquid that can be recovered in a single condensation.

[0028] The embodiment of the present invention provides a sample intelligent digestion integrated workstation, which includes a digestion device and an acid gas recovery device. The acidolysis device has a accommodating space inside, a test tube containing a sample is located in the accommodating space and is injected with acid by the digestion device, so that the acid digests the sample in the test tube. At the same time, the acid gas recovery device is directly connected to the test tube through an air guide tube, so that the acid gas in the test tube directly enters the acid gas recovery device, wherein the acid gas recovery device includes: a recovery bottle with a accommodating cavity inside, and a condenser located in the condensation space; wherein the recovery bottle has a medium inlet, a medium outlet, an acid gas inlet and an acid liquid outlet, the condenser connects the acid gas inlet and the acid liquid outlet, the coolant can flow into the accommodating cavity from the medium inlet, and the acid gas can flow into the acid gas inlet from the acid gas inlet The condenser tube condenses to form acid liquid after heat conduction with the coolant in the containing chamber, and flows out from the acid liquid outlet. Since the acid gas is located in the condenser tube, compared with directly passing the acid gas into the containing chamber, more acid gas can exchange heat with the coolant through heat conduction, so that the acid gas can be more thoroughly cooled by the coolant and condensed into acid liquid, thereby improving the recovery rate of the acid gas. Moreover, the coolant with a temperature rise after heat exchange with the acid gas flows out of the containing chamber from the medium outlet, which can keep the coolant in the containing chamber at a relatively low temperature, thereby further accelerating the cooling speed of the acid gas, thereby further increasing the recovery rate of the acid gas, reducing the acid gas content in the gas passed into the neutralization equipment, reducing the workload of the neutralization equipment, and thus reducing the maintenance cost of the neutralization equipment.

[0029] In some embodiments, Figure 3 As shown, the recovery bottle 21 also includes an acid gas outlet 215, and the acid gas recovery device 20 also includes: an air pump 23 and a switch valve 24. The air pump 23 is connected to the condenser 22 through the acid gas outlet 215, and the air pump 23 is used to suck the acid gas into the condenser 22. The switch valve 24 is arranged on the air guide tube 30, and is used to control the connection and blocking between the air guide tube 30 and the test tube. Specifically, the acid gas inlet 213 is connected to the test tube cover through the air guide tube 30. When the test tube cover is closed with the test tube, the acid gas inlet 213 is connected to the internal space of the test tube through the air guide tube 30, so that the acid gas in the test tube can enter the condenser 22 through the acid gas inlet 213. The switch valve 24 can control whether the acid gas in the test tube can enter the condenser 22 by controlling the on-off state between the air guide tube 30 and the test tube.

[0030] The on-off of the acid gas inlet 213 is controlled by the switch valve 24, so that the gas pressure in the test tube can be maintained within the target gas pressure range. Specifically, during the reaction of the acid gas and the sample in the test tube, acid gas is continuously generated in the test tube. In order to prevent the risk of acid gas escaping due to excessive gas pressure in the test tube, the air pump 23 is in a continuous operation state. When the pressure in the test tube is greater than the upper limit of the target gas pressure range, the switch valve 24 is opened to allow the acid gas in the test tube to enter the condenser 22 through the acid gas inlet 213. When the pressure in the test tube is less than the lower limit of the target gas pressure range, the switch valve 24 is closed to temporarily block the connection between the acid gas inlet 213 and the test tube. The switch state of the switch valve 24 can be controlled by the time length obtained by calibration, that is, the opening time and closing time of the switch valve 24 required at a specific temperature are obtained by calibration experiments. Under the intermittent opening and closing of this time length, the gas pressure in the test tube can be maintained within the target gas pressure range. The switch state of the switch valve 24 can also be controlled in real time by the gas pressure in the test tube obtained by the sensor.

[0031] It should be noted that the acid gas in the test tube is generated quickly, but controlling the opening and closing states of the air pump 23 requires a long response time. By keeping the air pump 23 in a state of continuous operation and controlling the air pressure in the test tube through the opening and closing states of the switch valve 24, the response speed of the opening and closing states of the switch valve 24 is much higher than the response speed of the opening and closing states of the air pump 23, thereby enabling more precise control of the air pressure in the test tube.

[0032] Optionally, when an air pump 23 and multiple air ducts 30 are respectively connected to multiple test tube caps, some of the test tube caps are in a closed state with the test tubes, and other test tube caps are not closed with the test tubes. By controlling the switch valve 24, the acid gas inlet 213 and the test tube caps located on the closed test tubes can be in a blocked state, so that the negative pressure generated by the air pump 23 only acts on the test tube caps located on the closed test tubes, that is, it is only used to draw the acid gas in the test tubes into the condenser 22, and will not draw air into the condenser 22 through the test tube caps located on the closed test tubes.

[0033] In some embodiments, Figure 3 As shown, the condenser 22 includes: a straight portion 224 and a spiral portion 225. The straight portion 224 extends in the vertical direction, and the spiral portion 225 spirally surrounds the outside of the straight portion 224. One end of the spiral portion 225 is connected to the acid gas inlet 213, and the other end of the spiral portion 225 is connected to the straight portion 224. One end of the straight portion 224 is connected to the acid liquid outlet 214, and the acid liquid outlet 214 is located at the bottom of the straight portion 224, thereby increasing the contact area between the acid gas and the coolant in the condenser 22, and allowing the condensed acid liquid to be discharged from the acid liquid outlet 214 under the action of gravity; optionally, there are multiple expansion portions 226 arranged at intervals along the straight portion 224, and each expansion portion 226 is arranged at intervals in the vertical direction and connected in sequence, thereby further increasing the volume of the acid gas that can be accommodated in the condenser 22 and further increasing the contact area between the acid gas and the coolant in the condenser 22. In some embodiments, as Figure 4 As shown, the acid gas recovery equipment 20 also includes: a neutralization adsorption structure 25, and at the same time, the condenser 22 also includes an exhaust port 221, and the exhaust port 221 is connected to the neutralization adsorption structure 25 through the exhaust pipe 222. Optionally, the exhaust pipe 222 passes through the recovery bottle 21 and is connected to the neutralization adsorption structure 25. It can be understood that the uncondensed residual acid gas in the condenser 22 is passed into the neutralization adsorption structure 25 through the exhaust port 221, and the alkaline substance in the neutralization adsorption structure 25 can neutralize the residual acid gas. The adsorbent in the neutralization adsorption structure 25, such as activated carbon, allows the residual acid gas to be discharged into the environment after being neutralized and adsorbed, thereby reducing pollution to the environment. Among them, the exhaust port 221 has an exhaust valve 223, and the exhaust valve 223 is used to control the opening and closing of the exhaust port 221, thereby controlling the exhaust state of the condenser 22. For example, the exhaust port 221 is controlled to be closed during the operation of the air pump 23, thereby reducing the negative pressure loss in the condenser 22.

[0034] In some embodiments, Figure 5As shown, the neutralization adsorption structure 25 is connected to the condenser 22 through the acid gas outlet 215. It can be understood that the neutralization adsorption structure 25 is connected to the air pump 23. It can be understood that the air pump 23 extracts the remaining gas in the condenser 22 and then passes it into the neutralization adsorption structure 25, that is, through the operation of the air pump 23, new acid gas is sucked into the condenser 22 and the remaining gas in the condenser 22 is extracted at the same time, so that the exhaust can be controlled without setting an exhaust valve. Moreover, since the acid gas enters and the remaining gas is discharged at the same time, a scavenging effect can be formed in the condenser 22, so that the remaining gas in the condenser 22 can be discharged more thoroughly.

[0035] In some embodiments, Figure 2 As shown, the medium inlet 211 and the medium outlet 212 are both connected to the accommodating chamber 210, that is, the accommodating chamber 210 is used to directly accommodate the coolant, and the outer surface of the condenser 22 is directly in contact with the coolant in the accommodating chamber 210. It can be understood that by directly accommodating the coolant with the accommodating chamber 210 having a larger volume, the volume of the accommodated coolant can be increased, so that more volume of coolant can participate in the cooling of the acid gas in the condenser 22, thereby further accelerating the condensation rate of the acid gas and improving the acid gas recovery rate.

[0036] In some embodiments, Figure 6 As shown, the acid gas recovery equipment 20 also includes a cooling pipe 26, which is located in the accommodating cavity 210, and the cooling pipe 26 connects the medium inlet 211 and the medium outlet 212. It can be understood that the cooling liquid is accommodated by the cooling pipe 26, that is, the accommodating cavity 210 does not directly accommodate the cooling liquid, but indirectly accommodates the cooling liquid through the cooling pipe 26 located in the accommodating cavity 210. The cooling liquid located in the accommodating cavity 210 does not flow freely in the accommodating cavity 210, but the flow path and flow range of the cooling liquid are limited by the cooling pipe 26, so that the flow of the cooling liquid is more controllable, and thus a better cooling effect on the acid gas in the condenser 22 can be achieved with a smaller amount of cooling liquid.

[0037] The embodiment of the present invention also provides a control method for a sample intelligent digestion integrated workstation, the control method is applied to the Figures 1 to 6In any of the samples shown in the integrated intelligent digestion workstation, the executor of the control method of the following embodiments may be, for example, the central processing unit of the sample intelligent digestion integrated workstation. The control related to duration in the control method may be realized by a timer. The timer may be a timer provided by the central processing unit. After the central processing unit sends a control signal or obtains the state of the corresponding actuator, the central processing unit realizes the control related to duration through its own timer. The timer may also be a timing unit of other actuators. The relevant actuator starts timing after executing the relevant action in response to the control signal of the central processing unit and feeds back the timing result to the central processing unit in real time or periodically, so that the central processing unit can realize the control related to duration. For the sake of convenience of explanation, the following takes the central control unit with its own timing unit and realizes the control related to duration through its own timing unit as an example to exemplify the specific steps of the control method of the sample intelligent digestion integrated workstation.

[0038] In some embodiments, the acid gas recovery device of the sample intelligent digestion integrated workstation further includes an air pump and a switch valve. The air pump is used to draw the acid gas from the test tube into the condenser tube, and the switch valve is used to control the opening and closing state between the air guide tube and the test tube. Figure 7 As shown, Figure 7 A flow chart of a control method of a first sample intelligent digestion integrated workstation provided by an embodiment of the present invention, the control method comprising: Step S101, controlling the digestion equipment to inject acid into the test tube so that the acid digests the sample in the test tube, and testing the digested sample.

[0039] It can be understood that the organic or inorganic impurities suspended on the surface of the sample are eliminated by the digestion effect of the acid solution on the sample, and the sample is tested after the digestion of the sample is completed. Exemplarily, the test of the sample may include quantitative analysis of the physical phase of the sample to determine the composition of the sample; it may also include crystal phase analysis of the sample to determine the crystal phase of the sample through an electron microscope; it may also include mechanical property testing of the sample to determine the mechanical properties of the sample, such as determining the hardness of the sample.

[0040] Step S102: Send a control signal to the switch valve to keep the air pressure in the test tube within a preset air pressure range.

[0041] It can be understood that by controlling the switching state of the switch valve, the acid gas in the test tube is passed into the condenser when the air pressure in the test tube is too high, thereby reducing the risk of acid gas escaping from the test tube, and at the same time condensing and recovering the acid gas. When the air pressure in the test tube is too low, the acid gas is stopped from being passed into the condenser, so that the air pressure in the test tube is balanced within a certain air pressure range.

[0042] In some embodiments, Figure 8 As shown, Figure 8 A flow chart of a control method for a second sample intelligent digestion integrated workstation provided in an embodiment of the present invention, and Figure 7 The control method shown is different in that Figure 7 Step S102 in the embodiment includes: Step S201: periodically send a control signal to the switch valve so that the switch valve is closed for a second time period after being opened for a first time period.

[0043] It can be understood that the opening and closing state of the switch valve is controlled by periodically controlling the signal, so that the switch valve is periodically switched between the two states of opening for a first duration and closing for a second duration, that is, the air pressure in the test tube is controlled by the preset opening duration and closing duration of the switch valve, so that the air pressure in the test tube is balanced within a preset pressure range. Among them, the first duration and the second duration can be obtained through a calibration experiment, and the opening duration and closing duration of the switch valve required at a specific temperature are obtained through the calibration experiment. Under the intermittent opening and closing of the duration, the air pressure in the test tube can be maintained within the target air pressure range.

[0044] In some embodiments, the sample intelligent digestion integrated workstation further includes a pressure sensor capable of obtaining the air pressure in the test tube, such as Fig. 9 As shown, Fig. 9 A flow chart of a control method for a third sample intelligent digestion integrated workstation provided in an embodiment of the present invention, and Figure 7 The control method shown is different in that Figure 7 Step S102 in the embodiment includes: Step S301: Obtain air pressure data in the test tube through a pressure sensor.

[0045] Among them, the pressure sensor can be made of acid-resistant material, so that it can be in direct contact with the acid gas in the test tube, and then directly measure the air pressure data in the test tube; the pressure sensor may not be in direct contact with the acid gas, so as to indirectly obtain the air pressure data in the test tube. Exemplarily, the sample intelligent digestion integrated workstation also includes a pressure sampling tube, which is connected to the test tube, and has an elastic film in the pressure sampling tube. The elastic film is made of elastic material and can undergo elastic deformation under the action of air pressure. The pressure sensor is a strain sensor, which is located on the side of the elastic film that is not in contact with the acid gas, and can obtain the strain of the elastic film to indirectly obtain the air pressure in the test tube.

[0046] Step S302: When the air pressure data is greater than the upper limit of the air pressure range, the switch valve is controlled to open; when the air pressure data is less than the lower limit of the air pressure range, the switch valve is controlled to close.

[0047] That is, the air pressure obtained by the pressure sensor is used to feedback control the opening and closing state of the switch valve, thereby more accurately controlling the pressure in the test tube.

[0048] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A sample intelligent digestion integrated workstation (1), characterized in that: The sample intelligent digestion integrated workstation (1) comprises: A digestion device (10) having a receiving space (11) therein, wherein the receiving space (11) is used to receive a test tube containing the sample, and the digestion device (10) is used to inject acid into the test tube to digest the sample; an acid gas recovery device (20), directly connected to the test tube via an air guide pipe (30), and used for recovering the acid gas volatilized in the test tube; Wherein, the acid gas recovery equipment (20) comprises: A recovery bottle (21) having a containing cavity (210) therein, the recovery bottle (21) having a medium inlet (211), a medium outlet (212), an acid gas inlet (213) and an acid liquid outlet (214), the medium inlet (211) and the medium outlet (212) being in communication, and the acid gas inlet (213) and the acid liquid outlet (214); A condenser pipe (22) is located in the containing space (11), and the condenser pipe (22) is connected to the acid gas inlet (213) and the acid liquid outlet (214); The medium inlet (211) is used for allowing the coolant to flow into the containing space (11), the medium outlet (212) is used for allowing the coolant to flow out of the containing space (11), and the acid gas in the condenser (22) can conduct heat transfer with the coolant in the containing space (11).

2. The sample intelligent digestion integrated workstation (1) according to claim 1, characterized in that: The recovery bottle (21) further comprises an acid gas outlet (215); Wherein, the acid gas recovery equipment (20) further comprises: An air pump (23) is connected to the condenser (22) through the acid gas outlet (215), and the air pump (23) is used to suck the acid gas into the condenser (22); The switch valve (24) is located in the air guide tube (30) and is used to control the connection and blocking between the air guide tube (30) and the test tube.

3. The sample intelligent digestion integrated workstation (1) according to claim 1 or 2, characterized in that: The condenser (22) comprises: A straight portion (224) extending in a vertical direction, the straight portion (224) being in communication with the acid liquid outlet (214), and the acid liquid outlet (214) being located at the bottom of the straight portion (224); The spiral portion (225) surrounds the outside of the straight portion (224) and extends along a spiral curve. The spiral portion (225) is connected to the acid gas inlet (213) and the straight portion (224).

4. The sample intelligent digestion integrated workstation (1) according to claim 1 or 2, characterized in that: The acid gas recovery device (20) further comprises: A neutralization adsorption structure (25) located in the containing space (11); Wherein, the condensing pipe (22) further comprises an exhaust port (221), and the exhaust port (221) is in communication with the neutralization adsorption structure (25); The exhaust port (221) has an exhaust valve (223), and the exhaust valve (223) is used to control the opening and closing of the exhaust port (221).

5. The sample intelligent digestion integrated workstation (1) according to claim 2, characterized in that: The acid gas recovery device (20) further comprises: The neutralization adsorption structure (25) is located in the accommodating space (11), and the neutralization adsorption structure (25) is connected to the air pump (23).

6. The sample intelligent digestion integrated workstation (1) according to claim 1, characterized in that: The medium inlet (211) and the medium outlet (212) are both in communication with the accommodating space (11); the accommodating space (11) is used to directly accommodate the coolant; and the outer surface of the condenser tube (22) is used to directly contact the coolant.

7. The sample intelligent digestion integrated workstation (1) according to claim 1, characterized in that: The acid gas recovery device (20) further comprises: A cooling pipe (26), the cooling pipe (26) being located in the accommodating space (11) and connecting the medium inlet (211) and the medium outlet (212), and the outer surface of the cooling pipe (26) being in contact with the outer surface of the condensing pipe (22).

8. A control method for a sample intelligent digestion integrated workstation, characterized in that: The control method is applied to the sample intelligent digestion integrated workstation according to any one of claims 1 to 7, wherein the acid gas recovery equipment further includes an air pump and a switch valve, and the control method includes: Controlling the digestion device to inject acid into the test tube so that the acid digests the sample, and testing the digested sample; A control signal is sent to the switch valve to keep the air pressure in the test tube within a preset air pressure range.

9. The control method according to claim 8, characterized in that: The step of sending a control signal to the switch valve so that the air pressure in the test tube is maintained within a preset air pressure range includes: A control signal is periodically sent to the switch valve so that the switch valve is closed for a second time period after being opened for a first time period.

10. The control method according to claim 8, characterized in that: The sample intelligent digestion integrated workstation also includes a pressure sensor capable of acquiring the air pressure in the test tube, and the sending of a control signal to the switch valve to keep the air pressure in the test tube within a preset air pressure range includes: acquiring the air pressure data in the test tube by the pressure sensor; When the air pressure data is greater than the upper limit of the air pressure range, the switch valve is controlled to be opened, and when the air pressure data is less than the lower limit of the air pressure range, the switch valve is controlled to be closed.

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