Gas-liquid separation device, sample injection reaction system and integrated gas-liquid separator

Abstract

The application belongs to the technical field of gas-liquid separation, and particularly relates to a gas-liquid separation device, a sample injection reaction system and an integrated gas-liquid separator. The gas-liquid separator comprises a container body, an exhaust pipe, a sample injection pipe and a waste discharge pipe connected with the container body; the container body comprises a converging portion, a horizontal section of the converging portion is contracted towards the inside of the container body, so that an upper cavity and a lower cavity are formed in the container body. The solution is introduced into the container body through the sample injection pipe and reacts in the lower cavity of the container body. When the reaction is violent and causes liquid splashing, the liquid is not easy to pass through the converging portion to reach the upper cavity, the humidity in the upper cavity is smaller, which helps to improve the effect of gas-liquid separation. And the gas passing through the converging portion diffuses in the upper cavity, so that the water vapor mixed in the gas and the liquid splashing into the upper cavity condense on the inner wall of the upper cavity and quickly flow back to the lower cavity, which can further improve the effect of gas-liquid separation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas-liquid separation, in particular to the field of gas-liquid separation system of portable atomic fluorescence spectrometer for analytical chemistry detection, and specifically relates to a gas-liquid separation device, a sample injection reaction system and an integrated gas-liquid separator. BACKGROUND

[0002] In industrial production or analytical chemistry, at least two solutions are usually introduced into a separator for reaction, and the generated gas after the solution reaction is collected for subsequent production or analysis process. During the reaction process, the gas and the liquid are separated under the action of gravity, the gas rises to the top of the separation device and leaves through the exhaust pipe arranged at the upper part of the separation device, and the liquid deposits at the bottom of the separator and is discharged through the waste discharge pipe arranged at the bottom of the separator.

[0003] However, the traditional separator is in the form of a vertical cylinder. When the solution reaction is violent, the liquid will splash to the upper part of the separator or even to the exhaust pipe, and the humidity of the upper and lower parts of the separator is large, thereby resulting in poor gas-liquid separation effect, and a large amount of water vapor is mixed in the gas leaving the separator through the exhaust pipe. When the water vapor content in the gas is high, the product quality or the analysis and detection result will be affected. Especially in atomic fluorescence analysis, when a large amount of water vapor is mixed in the gas, the water vapor will interfere with the test result after the gas and the water vapor enter the atomizer, and even the fluorescence quenching phenomenon will occur. SUMMARY

[0004] Therefore, the present application provides a gas-liquid separation device, which forms an upper cavity and a lower cavity in the container body by arranging a necking portion in the middle of the container body, reduces the probability of liquid splashing into the upper cavity through the necking portion, and condenses the water vapor mixed in the mixed gas and the liquid splashing into the upper cavity on the inner wall of the upper cavity and quickly returns to the lower cavity, so as to improve the problem of poor gas-liquid separation effect caused by liquid splashing.

[0005] According to the embodiments of the present application, the first aspect provides a gas-liquid separator, which comprises a container body, and an exhaust pipe, a sample injection pipe and a waste discharge pipe connected with the container body.

[0006] The container body comprises a necking portion, which is contracted to the inside of the container body, so that an upper cavity and a lower cavity are formed in the container body.

[0007] The exhaust pipe is communicated to the upper cavity, and the sample injection pipe and the waste discharge pipe are communicated to the lower cavity.

[0008] Further, the inner wall of the necking portion is curved to smoothly connect the upper cavity and the lower cavity.

[0009] Further, the upper cavity and the lower cavity are both spherical.

[0010] In the direction from the lower cavity to the upper cavity, the cross section of the necking portion is a circular arc shape protruding into the container body; the necking portion is respectively circumscribed with the upper cavity and the lower cavity.

[0011] Further, the container body is vertically arranged, the necking portion is located at the middle of the container body, and the upper cavity is located directly above the lower cavity.

[0012] Optionally, the upper cavity is located obliquely above the lower cavity.

[0013] Further, the sample inlet tube comprises a first tube opening located outside the container body and a second tube opening extending into the inside of the container body.

[0014] Further, the second tube opening is located directly below the center of the lower cavity, and in the direction from the first tube opening to the second tube opening, the height of the sample inlet tube gradually decreases.

[0015] According to the embodiments of the present application, a second aspect provides a sample inlet reaction system, comprising a mixing reactor and the aforementioned gas-liquid separation device.

[0016] Further, the mixing reactor comprises a gas inlet channel for accessing carrier gas, at least two solution channels for accessing solution, and a mixing output channel for connecting the gas inlet channel and the solution channels; the mixing output channel is connected to the sample inlet tube of the gas-liquid separation device through a first conduit.

[0017] Further, the mixing reactor is a diagonal four-way pipe, the gas inlet channel is located at one end of the mixing reactor and is in a middle position;

[0018] The solution channels comprise a first solution channel and a second solution channel, the first solution channel and the second solution channel are respectively located on both sides of the gas inlet channel.

[0019] The mixing output channel is located at the other end of the mixing reactor.

[0020] According to the embodiments of the present application, a third aspect provides an integrated gas-liquid separator, comprising a shell and the aforementioned sample inlet reaction system.

[0021] Further, it further comprises a secondary separator, the secondary separator comprises a body in the shape of a water droplet, a gas outlet pipe arranged at the top of the body, a gas inlet pipe arranged on the side wall of the body, and a pre-waste discharge pipe arranged at the bottom of the body; the gas outlet pipe is in communication with the gas inlet pipe.

[0022] Optionally, the mixing reactor, the gas-liquid separation device and the secondary separator are integrated; or

[0023] The mixing reactor and the gas-liquid separation device are integrated; or

[0024] The gas-liquid separation device and the secondary separator are integrated.

[0025] Further, the shell includes a box-shaped shell body having an opening and a cover body for covering the opening;

[0026] The shell body is provided with a first limiting support seat for mounting the gas-liquid separation device and the secondary separator, and a second limiting support seat for mounting the mixing reactor.

[0027] The first support limiting seat is in the shape of a channel steel, and a first clamping groove for clamping the closed end and a second clamping groove for clamping the gas outlet pipe are formed on one side wall of the first support limiting seat; a third clamping groove for clamping the waste discharge pipe and a fourth clamping groove for clamping the pre-waste discharge pipe are formed on the other side wall of the first support limiting seat.

[0028] The second limiting support seat includes a bottom plate and four clamping bosses protruding from the bottom plate, a first limiting portion for limiting the gas inlet channel is formed between the first clamping boss and the second clamping boss; a second limiting portion for limiting the second solution channel is formed between the second clamping boss and the third clamping boss; a third limiting portion for limiting the mixed output channel is formed between the third clamping boss and the fourth clamping boss; and a fourth limiting portion for limiting the first solution channel is formed between the first clamping boss and the fourth clamping boss.

[0029] Further, the integrated gas-liquid separator further includes a gas phase input pipe connected to the carrier gas channel, a first liquid phase input pipe connected to the first solution channel, a second liquid phase input pipe connected to the second solution channel, a waste discharge output pipe connected to the waste discharge pipe, a pre-waste discharge output pipe connected to the pre-waste discharge pipe, and a gas phase output pipe connected to the gas outlet pipe.

[0030] The gas phase input pipe extends into the shell body from above; the first liquid phase input pipe and the second liquid phase input pipe extend into the shell body from below; the waste discharge output pipe and the pre-waste discharge output pipe extend out of the shell body from below; and the gas phase output pipe extends out of the shell body from above.

[0031] Further, the shell is filled with epoxy resin, and the epoxy resin is used to fill the voids inside the shell.

[0032] By adopting the technical scheme of the application, the solution is introduced into the container body through the sample inlet pipe and reacts in the lower cavity of the container body, when the reaction is violent and causes liquid splashing, compared with the traditional straight cylinder-shaped separator, the inside of the converging portion of the gas-liquid separation device has a smaller cross-sectional area, liquid is not easy to pass through the converging portion to reach the upper cavity, most of the liquid splashes onto the inner side wall of the lower cavity, the humidity in the upper cavity is smaller, which helps to improve the effect of gas-liquid separation. And the gas passing through the converging portion will diffuse in the upper cavity, so that the small amount of liquid splashing into the upper cavity and the water vapor mixed in the gas condense into liquid droplets and quickly flow back to the lower cavity, which can further improve the effect of gas-liquid separation. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a perspective structural schematic view of the gas-liquid separation device in the embodiment;

[0034] Figure 2 It is a cross-sectional structural schematic view of the gas-liquid separation device in the embodiment;

[0035] Figure 3 It is an expanded structural schematic view of the sample reaction system in the embodiment;

[0036] Figure 4 It is a cross-sectional structural schematic view of the mixed reactor in the embodiment;

[0037] Figure 5 It is a perspective structural schematic view of the mixed reactor in some embodiments;

[0038] Figure 6 It is an internal structural schematic view of the integrated gas-liquid separator;

[0039] Figure 7 It is an expanded structural schematic view of the integrated gas-liquid separator;

[0040] Figure 8 It is a cross-sectional structural schematic view of the secondary separation device in the embodiment;

[0041] Figure 9 It is a structural schematic view of the shell of the integrated gas-liquid separator;

[0042] Figure 10 It is a structural schematic view of the first limiting support seat in the embodiment;

[0043] Figure 11 It is a structural schematic view of the second limiting support seat in the embodiment.

[0044] In the figure: gas-liquid separation device 1, container body 11, upper cavity 12, lower cavity 13, necked portion 14, exhaust pipe 15, sample inlet pipe 16, first pipe opening 161, second pipe opening 162, waste discharge pipe 17, mixing reactor 2, carrier gas channel 21, first solution channel 22, second solution channel 23, mixed output channel 24, first conduit 25, secondary separator 3, gas outlet pipe 31, gas inlet pipe 32, pre-waste discharge pipe 33, second conduit 34, shell 5, shell body 51, cover body 52, first limiting support seat 6, first clamping groove 61, second clamping groove 62, third clamping groove 63, fourth clamping groove 64, second limiting support seat 7, first clamping boss 71, second clamping boss 72, third clamping boss 73, fourth clamping boss 74, gas phase input pipe 81, first liquid phase input pipe 82, second liquid phase input pipe 83, waste discharge output pipe 84, pre-waste discharge output pipe 85, gas phase output pipe 86. DETAILED DESCRIPTION

[0045] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0046] The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the present specification, so that people skilled in the art can understand and read, and are not used to limit the defined conditions under which the present application can be implemented. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects that can be produced by the present application and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present application.

[0047] The orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "intermediate", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. in the present specification are based on the orientations or positional relationships shown in the drawings, and are only used to facilitate the description, and cannot be understood as indicating or implying 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 limiting the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0048] As Figure 1 and Figure 2As shown, the embodiment provides a gas-liquid separation device 1, which comprises a container body 11 and an exhaust pipe 15, a sample inlet pipe 16 and a waste discharge pipe 17 connected to the container body 11. In the embodiment, the container body 11 comprises a converging portion 14, which is shrunk towards the inside of the container body 11, so that the container body 11 forms an upper cavity 12 and a lower cavity 13. The exhaust pipe 15 is in communication with the upper cavity 12, and the sample inlet pipe 16 and the waste discharge pipe 17 are both in communication with the lower cavity 13.

[0049] The solution is introduced into the container body 11 through the sample inlet pipe 16 and reacts in the lower cavity 13 of the container body 11. When the reaction is violent and causes liquid splashing, compared with the conventional straight-cylindrical separator, the inside of the converging portion 14 of the gas-liquid separation device 1 of the embodiment has a smaller cross-sectional area, so that the liquid is not easy to pass through the converging portion 14 to reach the upper cavity 12, and most of the liquid splashes onto the inner wall of the lower cavity 13, so that the humidity in the upper cavity 12 is smaller, which helps to improve the effect of gas-liquid separation. Moreover, the gas passing through the converging portion 14 diffuses in the upper cavity 12, so that the small amount of liquid splashing into the upper cavity 12 and the water vapor mixed in the gas condense into liquid droplets and quickly flow back to the lower cavity 13, which helps to further improve the effect of gas-liquid separation.

[0050] The converging portion of the embodiment is formed by the side wall of the container body being recessed towards the inside, and the container body is preferably vertically arranged, the opening portion is located in the middle of the container body, the upper cavity is located directly above the lower cavity, and the gas generated in the lower cavity enters the upper cavity along the vertical direction. In some embodiments, the upper cavity is located obliquely above the lower cavity, and the gas enters the upper cavity from the lower cavity along the obliquely upward direction, which can increase the effect of gas-liquid separation.

[0051] In some embodiments, the converging portion can be formed by a protruding structure arranged on the inner wall of the container body. It should be noted that the protruding structure can be integrally formed with the side wall of the container body. The protruding structure can also be a separate structure from the container body, and the container body forms the converging portion by fixing the protruding structure on the side wall of the container body.

[0052] In the embodiment, the inner wall of the converging portion is preferably curved to smoothly connect the upper cavity and the lower cavity. Preferably, the upper cavity 12 and the lower cavity 13 are both spherical. The converging portion 14 is annular, and in the direction from the lower cavity 13 to the upper cavity 12, the cross section of the converging portion 14 is a circular arc protruding into the container body 11, and the converging portion 14 is respectively circumscribed with the contour of the upper cavity 12 and the lower cavity 13. In the present application, the upper cavity and the lower cavity are arranged to be spherical, the inner side walls of the upper cavity and the lower cavity are both smooth spherical surfaces, and the upper cavity and the lower cavity are smoothly transitioned by the converging portion 14, so that there is no corner structure inside the container body 11, and the water vapor is prevented from being retained at the corner. In some embodiments, the curved surface of the inner wall of the converging portion comprises a chamfer or a round corner formed by the contour of the converging portion and the upper cavity and / or the lower cavity.

[0053] In the embodiment, the sample inlet tube 16 comprises a first tube opening 161 located outside the container body 11 and a second tube opening 162 extending into the inside of the container body 11, the second tube opening 162 is located directly below the center of the lower cavity 13, and the height of the sample inlet tube 16 gradually decreases in the direction from the first tube opening 161 to the second tube opening 162. As the sample inlet tube 16 gradually decreases in height during the extension into the lower cavity 13, the solution in the sample inlet tube 16 can enter the lower cavity 13 under the action of the driving device (such as a peristaltic pump) and its own gravity.

[0054] The exhaust pipe 15 of the embodiment is preferably arranged at the top of the upper cavity 12 to ensure that the water vapor mixed in the gas in the upper cavity 12 is fully settled before flowing out through the exhaust pipe 15. The waste pipe 17 of the embodiment is preferably arranged at the bottom of the lower cavity 13 to facilitate the complete flow of liquid out of the lower cavity 13 and avoid the accumulation of liquid. In order to avoid opening holes on the container body 11 for installing the exhaust pipe 15, the waste pipe 17 and the sample inlet tube 16, the exhaust pipe 15, the waste pipe 17 and the sample inlet tube 16 are preferably integrally formed with the container body 11, which improves the airtightness of the container body 11.

[0055] As shown in Figure 3 , the embodiment also provides a sample inlet reaction system, which comprises the mixing reactor 2 and the aforementioned gas-liquid separation device. Specifically, as shown in Figure 4 , the mixing reactor 2 comprises at least one gas inlet channel for accessing gas, at least two sample inlet channels for accessing solution, and a mixing output channel 24 for connecting the gas inlet channel and the sample inlet channel, the mixing output channel 24 is connected to the sample inlet tube 16 through the first conduit 25.

[0056] In the embodiment, as gas is generated when the mixed solution is contacted in the mixing reactor 2, the carrier gas and the at least two solutions are injected into the mixing reactor 2 synchronously, the carrier gas not only can drive the generated gas in the mixing reactor 2 to enter the gas-liquid separation device 1, but also can promote the mixing of different solutions, which is helpful for the solution to fully react after reaching the lower cavity 13. Moreover, after the carrier gas enters the lower cavity 13 through the second tube opening 162 of the sample inlet tube 16, it can drive the solution in the lower cavity 13 to form a vortex, so as to further promote the mixing of the solution, thereby ensuring that the solution reacts more fully. In addition, the carrier gas can also drive the gas generated in the lower cavity 13 to enter the upper cavity 12, which is helpful for the gas to leave the gas-liquid separation device 1 through the exhaust pipe 15. It should be noted that the carrier gas in the embodiment is an inert gas.

[0057] As shown in Figure 4The mixed reactor 2 in the embodiment is a 45° cross pipe. The carrier gas channel 21 is located at one end of the mixed reactor 2 and at the middle position. The first solution channel 22 and the second solution channel 23 are respectively located at two sides of the carrier gas channel 21. The mixed output channel 24 is located at the other end of the mixed reactor 2. It should be noted that in use, the carrier gas channel 21, the first solution channel 22 and the second solution channel 23 are located at the upper part of the mixed reactor 2, and the mixed output channel 24 is located at the lower part of the mixed reactor 2. In some embodiments, the mixed reactor 2 can also be a Figure 5 The disc type cross pipe mixed reactor 2 in the embodiment is a conventional structure, and thus will not be described herein. It should be noted that the mixed reactor in some embodiments has two or more gas inlet channels. The mixed reactor in some embodiments has three or more solution channels. The number of the gas inlet channels and the solution channels of the mixed reactor can be set according to actual needs and is not limited to the cross pipe structure described in the embodiment.

[0058] In the embodiment, the mixed reactor 2 is higher than the sample inlet pipe 16. The solution in the mixed reactor 2 can enter the lower cavity 13 through the sample inlet pipe 16 under the action of gravity and the carrier gas, thereby saving power.

[0059] As shown in FIGS. 1 and 2, the embodiment further provides a sample inlet reaction system. The sample inlet reaction system comprises a mixed reactor 2 and a carrier gas channel 21. The mixed reactor 2 is connected to the carrier gas channel 21. The mixed reactor 2 is connected to the sample inlet pipe 16. The mixed reactor 2 is connected to the lower cavity 13. Figure 6 As shown in FIGS. 1 and 2, the embodiment further provides a sample inlet reaction system. The sample inlet reaction system comprises a mixed reactor 2 and a carrier gas channel 21. The mixed reactor 2 is connected to the carrier gas channel 21. The mixed reactor 2 is connected to the sample inlet pipe 16. The mixed reactor 2 is connected to the lower cavity 13. Figure 7 As shown in FIGS. 1 and 2, the embodiment further provides a sample inlet reaction system. The sample inlet reaction system comprises a mixed reactor 2 and a carrier gas channel 21. The mixed reactor 2 is connected to the carrier gas channel 21. The mixed reactor 2 is connected to the sample inlet pipe 16. The mixed reactor 2 is connected to the lower cavity 13. Figure 8 As shown in FIGS. 1 and 2, the embodiment further provides a sample inlet reaction system. The sample inlet reaction system comprises a mixed reactor 2 and a carrier gas channel 21. The mixed reactor 2 is connected to the carrier gas channel 21. The mixed reactor 2 is connected to the sample inlet pipe 16. The mixed reactor 2 is connected to the lower cavity 13.

[0060] The gas inlet pipe 32 of the embodiment penetrates the side wall of the body and extends to the inside of the separator. For convenient installation, the gas inlet pipe 32, the gas outlet pipe 31 and the pre-waste pipe 33 are integrally formed with the body. Since the secondary separator 3 in the embodiment is a conventional technology, it will not be described herein.

[0061] As shown in FIGS. 1 and 2, the embodiment further provides a sample inlet reaction system. The sample inlet reaction system comprises a mixed reactor 2 and a carrier gas channel 21. The mixed reactor 2 is connected to the carrier gas channel 21. The mixed reactor 2 is connected to the sample inlet pipe 16. The mixed reactor 2 is connected to the lower cavity 13. Figure 9 to Figure 11As shown, the shell 5 includes a box-shaped casing 51 with an opening and a cover 52 for covering the opening. The casing 51 is provided with a first limiting support seat 6 for mounting the gas-liquid separation device 1 and the secondary separator 3, and a second limiting support seat 7 for mounting the mixing reactor 2. Specifically, as shown in Figure 10 As shown, the first support limiting seat is in the form of a channel steel structure, and a first clamping groove 61 for clamping the receiving portion 14 and a second clamping groove 62 for clamping the gas outlet pipe 31 are formed on one side wall of the first support limiting seat; a third clamping groove 63 for clamping the waste discharge pipe 17 and a fourth clamping groove 64 for clamping the pre-waste discharge pipe 33 are formed on the other side wall of the first support limiting seat.

[0062] As shown in Figure 11 In this embodiment, the second limiting support seat 7 includes a rectangular bottom plate and clamping bosses protruding from the four corners of the bottom plate, and a first limiting portion for limiting the carrier gas channel 21 is formed between the first clamping boss 71 and the second clamping boss 72. A second limiting portion for limiting the second solution channel 23 is formed between the second clamping boss 72 and the third clamping boss 73. A third limiting portion for limiting the mixed output channel 24 is formed between the third clamping boss 73 and the fourth clamping boss 74. A fourth limiting portion for limiting the first solution channel 22 is formed between the first clamping boss 71 and the fourth clamping boss 74. The first support limiting seat and the second support limiting seat are preferably fixedly connected to the casing 51 by M3 cross recessed head screws.

[0063] As shown in Figure 6 and Figure 7 In this embodiment, the integrated gas-liquid separator 2 further includes a gas phase input pipe 81 connected to the carrier gas channel 21, a first liquid phase input pipe 82 connected to the first solution channel 22, a second liquid phase input pipe 83 connected to the second solution channel 23, a waste discharge output pipe 84 connected to the waste discharge pipe 17, a pre-waste discharge output pipe 85 connected to the pre-waste discharge pipe 33, and a gas phase output pipe 86 connected to the gas outlet pipe 31. Preferably, the gas phase input pipe 81 extends into the casing 51 from above; the first liquid phase input pipe 82 and the second liquid phase input pipe 83 extend into the casing 51 from below; the waste discharge output pipe 84 and the pre-waste discharge output pipe 85 extend out of the casing 51 from below, and the gas phase output pipe 86 extends out of the casing 51 from above.

[0064] The pipelines in this embodiment are connected by threading, and external threads are formed on the gas-liquid separation device 1, the mixing reactor 2 and the secondary separator 3, and internal threads are formed on the pipelines, so that the connection structure has no dead zone, ensuring smoother flow of gas and liquid and facilitating cleaning, reducing the probability of contamination, reducing memory effect and improving airtightness. The part of the pipeline that penetrates the casing 51 is sleeved with a wire protection ring for protecting and restraining the pipeline.

[0065] The embodiment integrates the mixing reactor 2, the gas-liquid separation device 1 and the secondary separator 3 in the shell 5, and also fills the shell 5 with epoxy resin, which can fill the gap inside the shell 5, fix the integrated components, play a buffering protection and maintenance-free role, and solve the problem of frequent replacement caused by material damage. The assembly process of the integrated gas-liquid separator is as follows: first, fix the first and second limiting support seats 6 and 7 in the shell 51; second, connect the mixing reactor 2, the gas-liquid separation device 1 and the secondary separator 3 with the pipeline; third, install the gas-liquid separation device 1 and the secondary separator 3 on the first limiting support seat 6, and fix the mixing reactor 2 on the second limiting support seat 7; fourth, fill the epoxy resin into the shell 51 and wait for the epoxy resin to solidify; fifth, fix the cover 52 with the shell 51.

[0066] In the embodiment, the mixing reactor 2, the gas-liquid separation device 1 and the secondary separator 3 are all separate components; in some embodiments, the mixing reactor 2, the gas-liquid separation device 1 and the secondary separator 3 can be designed as an integrated structure, or the mixing reactor 2 and the gas-liquid separation device 1 can be designed as an integrated structure, or the gas-liquid separation device 1 and the secondary separator 3 can be designed as an integrated structure, so that the integration degree of the gas-liquid separator is higher.

[0067] The gas-liquid separation device 1, the sample injection reaction system and the integrated gas-liquid separator in the embodiment are applied in atomic fluorescence analysis technology. The carrier gas is injected into the mixing reactor 2 through the carrier gas channel 21, the sample solution is injected into the mixing reactor 2 through the first solution channel 22, and the reducing agent solution is synchronously injected into the mixing reactor 2 through the second solution channel 23. The carrier gas promotes the mixing of the sample solution and the reducing agent solution in the mixing reactor 2, so that a small amount of gaseous hydride is generated in the mixing reactor 2; the carrier gas carries the gaseous hydride and follows the mixed sample solution and reducing agent solution into the gas-liquid separation device 1. The mixed sample solution and reducing agent solution react violently in the lower cavity 13 of the gas-liquid separation device 1, thereby generating a large amount of gaseous hydride; the carrier gas carrying the gaseous hydride enters the upper cavity 12 through the necked part 14, the gaseous hydride diffuses in the upper cavity 12 and makes the water vapor and a small amount of liquid splashed into the upper cavity 12 condense on the inner wall of the upper cavity 12 and quickly flow back to the lower cavity, so as to complete the first gas-liquid separation. The gaseous hydride after the first gas-liquid separation enters the secondary separator 3 for the second gas-liquid separation, and the gaseous hydride after the second gas-liquid separation leaves the secondary separator 3 and enters the atomizer. Since the gaseous hydride entering the atomizer has a small amount of water vapor, the test accuracy is high and the fluorescence quenching phenomenon does not occur. Moreover, the integrated gas-liquid separator has a short pipeline and a small volume, which can also reduce cross contamination and improve sensitivity.

[0068] Any combination of the technical features in the above embodiments can be made. For the sake of brevity, the foregoing description has not described all possible combinations of the technical features in the above embodiments, however, as long as the combination of the technical features does not contradict, it should be considered within the scope of the present disclosure.

[0069] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A gas-liquid separation device, comprising a container body, and an exhaust pipe, a sample inlet pipe and a waste discharge pipe connected to the container body; characterized in that: the container body comprises a converging portion which is contracted towards the inside of the container body, so that an upper cavity and a lower cavity are formed in the container body; the exhaust pipe is communicated to the upper cavity, and the sample inlet pipe and the waste discharge pipe are communicated to the lower cavity; the upper cavity and the lower cavity are both spherical; the sample inlet pipe comprises a first pipe opening outside the container body and a second pipe opening extending into the inside of the container body; the second pipe opening is located directly below the center of the lower cavity, and the height of the sample inlet pipe gradually decreases in the direction from the first pipe opening to the second pipe opening; when carrier gas enters the lower cavity through the second pipe opening of the sample inlet pipe, it can drive the solution in the lower cavity to form a vortex to promote the mixing of the solution; the inner wall of the converging portion is curved to smoothly connect the upper cavity and the lower cavity; in the direction from the lower cavity to the upper cavity, the cross section of the converging portion is a circular arc protruding into the container body; the converging portion is respectively circumscribed with the profiles of the upper cavity and the lower cavity; the container body is vertically arranged, the converging portion is located in the middle of the container body, and the upper cavity is located directly above the lower cavity; the upper cavity is located obliquely above the lower cavity; the gas-liquid separation device comprises a mixing reactor and any one of the gas-liquid separation devices according to claims 1-5; the mixing reactor comprises at least one gas inlet channel for accessing gas, at least two sample inlet channels for accessing solution, and a mixing output channel for communicating the gas inlet channel and the sample inlet channel; the mixing output channel is communicated to the sample inlet pipe of the gas-liquid separation device; the mixing reactor is a diagonal four-way pipe, the gas inlet channel comprises a carrier gas channel, the carrier gas channel is located at one end of the mixing reactor and is in a middle position; the sample inlet channel comprises a first solution channel and a second solution channel, the first solution channel and the second solution channel are respectively located on both sides of the carrier gas channel; the mixing output channel is located at the other end of the mixing reactor; the sample inlet reaction system comprises a housing and the sample inlet reaction system according to claim 8; the integrated gas-liquid separator further comprises a secondary separator, the secondary separator comprises a body in the shape of a water droplet, an exhaust pipe arranged at the top of the body, a gas inlet pipe arranged on the side wall of the body, and a pre-waste discharge pipe arranged at the bottom of the body; the exhaust pipe is communicated with the gas inlet pipe; the mixing reactor, the gas-liquid separation device and the secondary separator are integrally formed; or the mixing reactor and the gas-liquid separation device are integrally formed; or the gas-liquid separation device and the secondary separator are integrally formed; the housing comprises a shell in the shape of a box with an opening and a cover for covering the opening; the shell is provided with a first limiting support seat for mounting the gas-liquid separation device and the secondary separator, and a second limiting support seat for mounting the mixing reactor. ​ ​ ​ ​ ​ ​ 2. The gas-liquid separation device of claim 1, wherein: ​ 3. The gas-liquid separation device of claim 2, wherein: ​ 4. The gas-liquid separation device of claim 3, wherein: ​ 5. The gas-liquid separation device of claim 3, wherein: ​ 6. A sample introduction reaction system characterized by: ​ 7. The sample introduction reaction system of claim 6, wherein: ​ 8. The sample introduction reaction system of claim 7, wherein: ​ ​ ​ 9. An integrated gas-liquid separator characterized by: ​ 10. The integrated gas-liquid separator of claim 9, wherein: ​ 11. The integrated gas-liquid separator of claim 10, wherein: ​ ​ ​ 12. The integrated gas-liquid separator of claim 11, wherein: ​ ​ The first limiting support seat is in the shape of a channel steel, one side wall of the first limiting support seat is provided with a first clamping groove for clamping the closing part and a second clamping groove for clamping the gas outlet pipe; the other side wall of the first limiting support seat is provided with a third clamping groove for clamping the waste discharge pipe and a fourth clamping groove for clamping the pre-waste discharge pipe; The second limiting support seat comprises a bottom plate and four clamping bosses protruding from the bottom plate, a first limiting part for limiting the gas inlet channel is formed between the first clamping boss and the second clamping boss; a second limiting part for limiting the second solution channel is formed between the second clamping boss and the third clamping boss; a third limiting part for limiting the mixed output channel is formed between the third clamping boss and the fourth clamping boss; and a fourth limiting part for limiting the first solution channel is formed between the first clamping boss and the fourth clamping boss.

13. The integrated gas-liquid separator of claim 12, wherein: The integrated gas-liquid separator further comprises a gas phase input pipe connected with the carrier gas channel, a first liquid phase input pipe connected with the first solution channel, a second liquid phase input pipe connected with the second solution channel, a waste discharge output pipe connected with the waste discharge pipe, a pre-waste discharge output pipe connected with the pre-waste discharge pipe, and a gas phase output pipe connected with the gas outlet pipe. The gas phase input pipe extends into the shell from above; the first liquid phase input pipe and the second liquid phase input pipe extend into the shell from below; the waste discharge output pipe and the pre-waste discharge output pipe extend out of the shell from below; The gas phase output pipe extends out of the shell from above.

14. The integrated gas-liquid separator of any of claims 9-13, wherein: The shell is filled with epoxy resin, and the epoxy resin is used to fill the voids inside the shell.

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