CN211954810U - Online collection device for inorganic elements in gas - Google Patents

Abstract

The utility model relates to an inorganic element on-line collection device in gas. The on-line collecting device for inorganic elements in the gas comprises: a box body; the dissolving liquid device is arranged in the box body and is used for supplying absorption liquid with preset concentration; the gas supply device is arranged outside the box body, is communicated with an external gas pipeline and is used for supplying gas with preset flow; and the absorption device is arranged in the box body and is respectively communicated with the solution device and the gas supply device so as to contain absorption liquid with a preset volume and absorb and dissolve inorganic elements in the gas in the absorption liquid to generate sample liquid to be detected. The utility model discloses can collect the inorganic element in the gas fast, the follow-up concentration of measuring inorganic element of being convenient for in time reflects the technology running state and the emission abnormal conditions of external gas pipeline.

Description

Online collection device for inorganic elements in gas

Technical Field

The utility model relates to an exhaust-gas detection technical field especially relates to an inorganic element on-line collection device in gas.

Background

The gaseous emissions generated during the operation of nuclear facilities are radioactive and may be called radioactive gases, and the activity and concentration of the contained artificial radionuclide belong to the key concerns of nuclear security, facility operation and environmental monitoring. According to the requirements of national laws and regulations, the key nuclides in the gaseous emission should be quantitatively analyzed in time. Currently, for monitoring gaseous emissions, automatic or manual continuous accumulation sampling by a filter membrane is generally adopted, and after decay for four days by a decay method/pseudo-coincidence method, total alpha activity and total beta activity are measured by a low-background aerosol radioactivity monitor. Although the method has high measurement accuracy, the response time is long due to the limitation of aerosol sampling and radon decay daughter reduction process, the abnormal time period of tail gas emission and the process running state cannot be fed back in time, and the species and the content of the key nuclide cannot be obtained.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an inorganic element on-line collection device in gas, this inorganic element on-line collection device can collect the inorganic element in the gas fast, the follow-up inorganic element's of measurement concentration of being convenient for.

On the one hand, the utility model provides an inorganic element on-line collection device in gas, include: a box body; the dissolving liquid device is arranged in the box body and is used for supplying absorption liquid with preset concentration; the gas supply device is arranged outside the box body, is communicated with an external gas pipeline and is used for supplying gas with preset flow; and the absorption device is arranged in the box body and is respectively communicated with the solution device and the gas supply device so as to contain absorption liquid with a preset volume and absorb and dissolve inorganic elements in the gas in the absorption liquid to generate sample liquid to be detected.

According to the utility model discloses an aspect, absorbing device includes that base and lid fit the jar body of base, is formed with between base and the jar body and holds the chamber, holds the chamber and is used for holding the appearance liquid that awaits measuring.

According to the utility model discloses an aspect is provided with on the base and holds air inlet and feed liquor/liquid outlet of chamber intercommunication, and the air inlet is used for letting in gas, and feed liquor/liquid outlet is arranged in leading-in/derives the absorption liquid that dissolves in the liquid device, is provided with the gas outlet on the jar body, and the gas outlet is used for discharging not absorbing the gas of dissolving in the absorption liquid.

According to the utility model discloses an aspect still is provided with the aeration board in the base, is provided with a plurality of micropores on the aeration board, and the micropore aperture size is 0.1mm ~ 0.5 mm.

According to an aspect of the utility model, aeration plate is predetermined angle alpha slope setting for the horizontal plane, and the air inlet sets up in aeration plate's below, and feed liquor/liquid outlet sets up in aeration plate's top.

According to the utility model discloses an aspect, the surface cladding of jar body has the zone of heating for the heating absorption liquid.

According to the utility model discloses an aspect, the online collection device of inorganic element in the gas still includes gaseous heating module, and gaseous heating module sets up between gas supply device and absorbing device.

According to the utility model discloses an aspect, the online collection device of inorganic element in the gas still includes temperature-detecting device, still be provided with on the jar body with hold the first installing port of chamber intercommunication, temperature-detecting device place in first installing port is used for surveying the temperature of the appearance liquid that awaits measuring.

According to the utility model discloses an aspect, the online collection device of inorganic element in the gas still includes liquid level detector, still be provided with on the jar body with hold the second installing port of chamber intercommunication, liquid level detector place in the second installing port is used for surveying the liquid level of the appearance liquid that awaits measuring.

According to the utility model discloses an aspect, absorbing device's quantity is two, and one of them absorbing device's gas outlet passes through the pipeline intercommunication with another absorbing device's air inlet, and one of them absorbing device's air inlet is used for letting in gas, and another absorbing device's gas outlet is used for discharging not absorbing the gas of dissolving in the absorption liquid.

According to an aspect of the utility model, be provided with pressure measurement and flow detection device between gas supply device and the absorbing device.

According to an aspect of the utility model, the online collection device of inorganic element in the gas still includes: the electric control unit is arranged in the box body and is electrically connected with the gas supply device; and the electromagnetic valve is electrically connected with the electric control unit and at least respectively communicated with the absorption device and the dissolving liquid device.

The utility model provides a pair of online collection device of inorganic element in gas and collection method, through set up absorbing device in the box, absorbing device and the solution device of supply absorption liquid and the gaseous gas supply device of supply all communicate to absorb the inorganic element in the gas and dissolve in the absorption liquid, can collect the inorganic element in the gas fast, the follow-up concentration of measuring inorganic element of being convenient for, in time reflect the process running state and the emission abnormal conditions of external gas pipeline.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. The figures are not drawn to scale.

Fig. 1 is a schematic structural diagram of an on-line collecting device for inorganic elements in gas according to an embodiment of the present invention;

FIG. 2 is a schematic of the topology of the on-line collection device for inorganic elements shown in FIG. 1;

FIG. 3 is a schematic view showing a longitudinal sectional structure of an absorption apparatus for an inorganic element in the on-line collecting apparatus shown in FIG. 1;

FIG. 4 is a schematic view showing a back structure of the on-line collecting apparatus for inorganic elements shown in FIG. 1;

fig. 5 is a schematic view of the inorganic element on-line collecting device shown in fig. 1 with a front panel removed.

Description of reference numerals:

10-a box body; 1-a front panel; 2-a display screen; 3-a sampling port; 4-a door body; 5-a heat dissipation fan; 6-a rear panel; 7-a first entrance door; 8-a second entrance door; 9-heat dissipation holes; 10 a-a separator; 11-a first containing cavity; 12-a second containing cavity; 13-a third containing chamber;

20-a solution device; 21-a syringe pump;

30-an absorption device; 31-a base; an O-containing cavity; 311-an air inlet; 312-liquid inlet/outlet; 321-an air outlet; 314-an aeration plate; 32-can body; 322-a first mounting port; 323-a second mounting port; 324-a heating layer; 325-temperature detection means; 326-bubble detection means; 40-a gas supply; 41-an air pump; 42-a pressure maintaining valve; 43-a solenoid valve; 44-a pressure gauge;

50-an electronic control unit; 61-pressure detection means; 62-a flow detection device; 63-a gas heating module; 71-a cleaning device; 72-a waste liquid device; 80-a solenoid valve; 90-sampling device.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the drawings and the following description, well-known structures and techniques, at least in part, are not shown in order to avoid unnecessarily obscuring the present invention; also, the size of the region structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

For better understanding of the present invention, the following describes in detail an on-line collecting device for inorganic elements in gas provided by the embodiments of the present invention with reference to fig. 1 to 5.

The gas in the conduit is typically in an aerosol state. In the online analysis of the aerosol Mass spectrum, the sensitivity fluctuation of an Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is large due to the fluctuation of the aerosol sample injection flow. Furthermore, there are currently no internationally certified quality standard aerosol particles of known concentration and composition due to aerosol instability. Therefore, the online analysis of the aerosol mass spectrum cannot be quantitatively analyzed.

Therefore, the utility model provides a pair of inorganic element on-line collection device in gas will wait to detect inorganic element in the gas and carry to absorb in the absorption liquid and dissolve to the generation awaits measuring appearance liquid. After the concentration of the inorganic elements reaches the detection limit of ICP-MS, the collected inorganic elements can be quantitatively analyzed by ICP-MS.

Referring to fig. 1 and 2 together, an embodiment of the present invention provides an on-line collecting device for inorganic elements in gas, including: a tank 10, a solution device 20 disposed in the tank 10, an absorption device 30, and a gas supply device 40 disposed outside the tank 10.

A dissolving liquid device 20 is provided in the tank 10 for supplying an absorption liquid having a predetermined concentration. Optionally, the absorption liquid is a nitric acid solution, which is capable of dissolving the inorganic elements carried in the gas to be detected.

The gas supply device 40 is disposed outside the case 10, and the gas supply device 40 is communicated with an external gas pipe for supplying a predetermined flow rate of gas. The gas supply device 40 comprises a pressure gauge 44, an electromagnetic valve 43, a suction pump 41 and a pressure stabilizing valve 42 which are communicated in sequence, wherein the suction pump 41 continuously pumps gas in an external gas pipeline, and the gas is output at a stable flow rate after being subjected to pressurization and pressure stabilization regulation.

The absorption device 30 is disposed in the box 10, and the absorption device 30 is respectively communicated with the solution device 20 and the gas supply device 40 to contain a predetermined volume of absorption liquid and absorb and dissolve inorganic elements in the gas in the absorption liquid to generate a sample liquid to be measured. Optionally, the dissolving solution device 20 introduces the absorption solution into the absorption device 30 through the syringe pump 21, so as to ensure the accuracy of the introduction volume of the absorption solution and facilitate quantitative analysis.

The embodiment of the utility model provides a pair of inorganic element on-line collection device in gas, through set up absorbing device 30 in box 10, absorbing device 30 and the solution device 20 of supply absorption liquid and the gaseous gas supply device 40 of supply all communicate, so that absorb the inorganic element in the gas and dissolve in the absorption liquid, can be real-time, collect the inorganic element in the gas fast, be convenient for follow-up inorganic element's of measurement concentration, in time reflect the process running state and the emission abnormal conditions of external gas pipeline.

The specific structure of the on-line collecting device for inorganic elements in the gas is described in further detail below with reference to the accompanying drawings.

Referring to fig. 3, the absorption device 30 includes a base 31 and a tank body 32 covering the base 31, and a containing cavity O is formed between the base 31 and the tank body 32 and is used for containing the sample liquid to be measured.

Specifically, the base 31 is provided with a gas inlet 311 and a liquid inlet/outlet 312 which are communicated with the accommodating chamber O, the gas inlet 311 is used for introducing gas, and the liquid inlet/outlet 312 is used for introducing/discharging the absorption liquid in the solution device 20. The tank body 32 is provided with an air outlet 321, and the air outlet 321 is used for discharging gas which is not absorbed and dissolved in the absorption liquid. Optionally, the gas outlet 321 is communicated with an external gas pipeline to recover residual gas to prevent the residual gas from polluting the environment.

In order to improve the absorption rate of the absorption device 30 to inorganic elements in the gas, an aeration plate 314 is further arranged in the base 31, a plurality of micropores are arranged on the aeration plate 314, and the pore size of the micropores is 0.1 mm-0.5 mm. Optionally, the aeration plate 314 is made of an acid-resistant material, such as ceramic. The micropore aperture of the aeration plate is small, and the micropores are uniformly distributed on the aeration plate 314, so that large bubbles entering the gas in the accommodating cavity O can be diffused into small bubbles, and the diffusion uniformity of the gas is improved.

Optionally, the aeration plate 314 is disposed inclined at a predetermined angle α with respect to the horizontal plane. Alternatively, the predetermined angle α is 1 ° to 3 °. Alternatively, α is 2 ° in order to smoothly discharge the absorption liquid from the surface of the aeration plate 314 and prevent the absorption liquid from clogging the micropores.

The air inlet 311 is disposed below the aeration plate 314, and the liquid inlet/outlet 312 is disposed above the aeration plate 314. The gas inlet 311 and the liquid inlet/outlet 312 are arranged so that the gas is diffused from large bubbles into small bubbles and then is absorbed and dissolved in the absorption liquid, thereby improving the solubility of the gas.

Further, a pressure detection device 61 and a flow rate detection device 62 are provided between the gas supply device 40 and the absorption device 30. The pressure detecting means 61 and the flow rate detecting means 62 respectively display the pressure and the flow rate of the gas, and ensure that the gas is supplied to the absorbing means 30 at a predetermined flow rate and a predetermined pressure, ensuring accurate metering of the gas.

In some embodiments, the outer surface of the can body 32 of the absorbent device 30 is coated with a heating layer 324 for heating the absorbent liquid. As shown in fig. 2, the heating layer 324 may be a heating pipe coated on the outer surface of the tank body 32, and after the absorption liquid is heated, the molecular movement speed of the absorption liquid is increased, so that the dissolution efficiency of the inorganic element in the absorption liquid is improved, and the collection efficiency of the inorganic element is further improved.

In some embodiments, a gas heating module 63 is further disposed between the gas supply device 40 and the absorption device 30, and is used for heating the gas, so as to accelerate the molecular movement of the gas, improve the dissolution efficiency of the inorganic element in the absorption liquid, and further improve the collection efficiency of the inorganic element.

In order to accurately grasp and control the temperature of the sample liquid to be measured, the embodiment of the utility model provides an inorganic element on-line collection device in the gas still includes temperature-detecting device 325, still is provided with on jar body 32 and holds the first installing port 322 of chamber O intercommunication, and temperature-detecting device 325 is placed in first installing port 322 for survey the temperature of the sample liquid to be measured. As shown in fig. 2, the temperature detecting device 325 may be any device capable of measuring temperature, such as a thermometer or a temperature sensor, so as to ensure that the dissolution rate of the gas can be quantitatively analyzed.

Additionally, the embodiment of the utility model provides an inorganic element on-line collection device in gas still includes liquid level detector (not shown in the figure), still is provided with on jar body 32 and holds the second installing port 323 of chamber O intercommunication, and liquid level detector places in second installing port 323 for survey the liquid level of the appearance liquid that awaits measuring. In the process that gas which is not dissolved in the absorption liquid is discharged outside through the gas outlet 321 for a long time, part of the absorption liquid may be taken away to reduce the absorption liquid in the absorption device 30, so that the dissolution rate of the inorganic elements is reduced, the liquid level detector can timely detect the variation of the liquid level height, and the absorption liquid lost by the absorption device 30 is automatically replenished by the solution device 20.

In order to further improve the solubility of the inorganic elements in the absorption liquid of the absorption devices 30, as shown in fig. 2, in some embodiments, the number of the absorption devices 30 is two, wherein the gas outlet 321 of one absorption device 30 is communicated with the gas inlet 311 of the other absorption device 30 through a pipeline, the gas inlet 311 of one absorption device 30 is used for introducing gas, and the gas outlet 321 of the other absorption device 30 is used for discharging gas which is not absorbed and dissolved in the absorption liquid.

Thereby, the two absorption devices 30 are communicated with each other, and the gas supplied through the gas supply device 40 is dissolved by two-stage absorption of the two absorption devices 30, thereby increasing the dissolution rate of the inorganic element in the absorption liquid.

Additionally, the embodiment of the utility model provides an inorganic element on-line collection device in gas still including setting up and the sampling device 90 in the box 10, sampling device 90 and absorbing device 30's feed liquor/liquid outlet 312 intercommunication to retrieve the sample liquid that awaits measuring. When the inorganic elements are completely collected, the sampling device 90 can automatically sample the inorganic elements.

In the automatic sampling, as shown in fig. 2, a bubble detector 326 may be provided at the air outlet 321 of the absorber 30 in order to ensure that the sample liquid to be measured is completely recovered to the sampling device 90. If the bubble detector 326 detects the bubble at the air outlet 321, it can be determined that the sample liquid to be measured is completely taken out.

Referring again to fig. 2, in order to ensure that each measurement is not affected by the previous measurement, the inorganic element on-line collecting apparatus further includes a cleaning apparatus 71 and a waste liquid apparatus 72 communicating with the absorbing apparatus 30, and the cleaning apparatus 70 supplies ultrapure water. After the recovery of the sample liquid, the absorption apparatus 30 and its downstream components are rinsed with ultrapure water in the rinsing apparatus 70, and the rinsed waste liquid is introduced into the waste liquid apparatus 72.

In order to realize the function of automatically collecting inorganic elements, the utility model provides an online collection device of inorganic elements in gas still includes the electrical unit 50 who sets up in box 10, and electrical unit 50 is connected with gas supply device 40 electricity. The electronic control unit 50 controls the opening or closing of the suction pump 41 based on the pressure value detected by the pressure gauge 44 in the gas supply device 40.

Specifically, if the pressure of the external gas pipeline can ensure the normal supply of the gas, the air pump 41 is automatically turned off, and the original gas of the gas pipeline is directly input into the absorption device 30 for collection and subsequent analysis after being stabilized and stabilized in pressure. If the pressure of the gas pipeline is low and normal test cannot be completed, the electronic control unit 50 will automatically start the air pump 41 to perform pressurization.

In addition, the utility model provides an inorganic element on-line collection device in gas still includes the solenoid valve 80 of being connected with the electrical unit 50 electricity, and solenoid valve 80 communicates with absorbing device 30, solution device 20 respectively at least. When the on-line inorganic element collecting device further comprises a sampling device 90, a cleaning device 71 and a waste liquid device 72, the electromagnetic valve 80 is also communicated with the cleaning device 71, the waste liquid device 72 and the sampling device 90.

Alternatively, the electromagnetic valve 80 is a six-way electromagnetic valve, and the electromagnetic valve 80 is respectively communicated with the two absorption devices 30, the solution device 20, the cleaning device 71, the waste liquid device 72 and the sampling device 90. When in measurement, firstly, the dissolving solution device 20 is communicated with the absorption device 30, the electronic control unit 50 controls the electromagnetic valve 80 to open the switch valves of the absorption device 30 and the dissolving solution device 20, and the absorption solution in the dissolving solution device 20 is introduced into the absorption device 30 through the injection pump 21; then, the gas supply device 40 and the absorption device 30 which are communicated with the external gas pipeline are communicated, the inorganic elements in the gas are collected, and the inorganic elements are absorbed and dissolved in the absorption liquid to generate the sample liquid to be measured. After the gas collection is finished, the electronic control unit 50 controls the electromagnetic valve 80 to close the on-off valves of the absorption device 30 and the solution device 20, and starts the on-off valve of the sampling device 90. After the sampling is completed, the on-off valve of the sampling device 90 is closed, the on-off valves of the cleaning device 71 and the waste liquid device 72 are opened, the absorption device 30 and the components and the like downstream thereof are rinsed with ultrapure water in the cleaning device 71, and the rinsed waste liquid flows into the waste liquid device 72. After the completion of the flushing, the on-off valves of the cleaning device 71 and the waste liquid device 72 are closed, and the next gas collection cycle is performed.

Referring to fig. 1, 4 and 5, the case 10 includes a front panel 1 and a rear panel 6. The front panel 1 is provided with a display screen 2 for displaying detection parameters of inorganic elements in an online collection process, such as gas pressure, flow and absorption liquid volume, so that the inorganic elements can be accurately quantified. Still be provided with sample connection 3 on the front panel 1, be provided with the flip lid on the sample connection 3, flip lid is lifted and can be placed or take out the appearance liquid that awaits measuring through sample connection 3. The front panel 1 is also provided with a door 4, and the dissolving liquid device 20 can be placed or taken out by opening the door 4.

The rear panel 6 is further provided with a first inlet door 7 and a second inlet door 8, the gas in the external gas pipeline passes through the first inlet door 7 to be communicated with the absorption device 30, and the waste liquid device 72 outside the box body 10 is communicated with the absorption device 30 through a pipeline passing through the first inlet door 7. The second entrance door 8 is provided with a power switch and the like, and the power supply can be cut off after the measurement is finished. The dotted line position above the rear panel 6 is a circuit structure layout area including the electronic control unit 50, the heat dissipation holes 9 are further formed below the rear panel, the heat dissipation fan 5 is arranged at the top of the box body 10, and the heat dissipation fan 5 and the heat dissipation holes 9 form air convection for dissipating heat of the inorganic element online collection device. In addition, the bottom of the box 10 may be designed with rollers for easy transportation.

In order to arrange the components of the on-line inorganic element collecting device in the box 10 orderly and save space, a partition plate 10a is arranged in the box 10, and the partition plate 10a divides the inner space of the box 10 into at least a first accommodating cavity 11, a second accommodating cavity 12 and a third accommodating cavity 13. Alternatively, the electronic control unit 50, the absorption device 30, the solenoid valve 80, the syringe pump 21, and the like are placed in the first containing chamber 11, the gas heating module 63, the pressure detecting device 61, the flow meter 62, and the like are placed in the second containing chamber 12, and the dissolving liquid device 20 and the cleaning device 70 are placed in the third containing chamber 13.

Thus, on the one hand, the box 10 provides good environmental and quantitative data collection for inorganic elements; on the other hand, the case 10 places the dissolving solution device 20, the absorption device 30 and other parts together, so that the structure is compact, the occupied space is small, and the popularization and the use are facilitated.

In addition, the embodiment of the present invention further provides an online collecting method for inorganic elements in gas, which is applied to the online collecting device for inorganic elements in gas as described above, and the online collecting method for inorganic elements in gas includes:

step S1: the dissolving liquid device 20 is communicated with the absorption device 30 through a pipeline;

step S2: one end of the gas supply device 40 is communicated with an external gas pipeline, and the other end is communicated with the absorption device 30;

step S3: the gas supply device 40 and the solution device 30 are started to introduce the absorption liquid in the solution device 20 into the absorption device 30, and the inorganic elements in the gas are absorbed and dissolved in the absorption liquid to generate the sample liquid to be measured.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (12)

1. An on-line collection device for inorganic elements in a gas, comprising:

a case (10);

a dissolving liquid device (20) arranged in the box body (10), wherein the dissolving liquid device (20) is used for supplying absorption liquid with preset concentration;

the gas supply device (40) is arranged outside the box body (10), and the gas supply device (40) is communicated with an external gas pipeline and is used for supplying gas with a preset flow rate;

and the absorption device (30) is arranged in the box body (10), and the absorption device (30) is respectively communicated with the dissolving liquid device (20) and the gas supply device (40) so as to contain the absorption liquid with the preset volume and absorb and dissolve inorganic elements in the gas in the absorption liquid to generate sample liquid to be detected.

2. The on-line inorganic element collecting device according to claim 1, wherein the absorption device (30) comprises a base (31) and a tank body (32) covering the base (31), and a containing cavity (O) is formed between the base (31) and the tank body (32) and is used for containing the sample liquid to be measured.

3. The on-line inorganic element collecting device according to claim 2, wherein a gas inlet (311) and a liquid inlet/outlet (312) are disposed on the base (31) and are communicated with the accommodating cavity (O), the gas inlet (311) is used for introducing the gas, the liquid inlet/outlet (312) is used for introducing/discharging the absorption liquid in the solution device (20), and a gas outlet (321) is disposed on the tank body (32), and the gas outlet (321) is used for discharging the gas which is not absorbed and dissolved in the absorption liquid.

4. The on-line inorganic element collecting device according to claim 3, wherein an aeration plate (314) is further disposed in the base (31), and a plurality of micropores are disposed on the aeration plate (314), and the pore size of the micropores is 0.1mm to 0.5 mm.

5. The apparatus for on-line collection of inorganic elements according to claim 4, wherein the aeration plate (314) is disposed to be inclined at a predetermined angle α with respect to a horizontal plane, the air inlet (311) is disposed below the aeration plate (314), and the liquid inlet/outlet (312) is disposed above the aeration plate (314).

6. The on-line inorganic element collecting device according to claim 2, wherein the outer surface of the tank body (32) is coated with a heating layer (324) for heating the absorbing liquid.

7. The on-line collection device of inorganic elements according to claim 1, further comprising a gas heating module (63), the gas heating module (63) being disposed between the gas supply device (40) and the absorption device (30).

8. The on-line inorganic element collecting device according to claim 2, further comprising a temperature detecting device (325), wherein the tank body (32) is further provided with a first mounting port (322) communicated with the accommodating cavity (O), and the temperature detecting device (325) is placed in the first mounting port (322) and is used for detecting the temperature of the sample liquid to be detected.

9. The on-line inorganic element collecting device according to claim 2, further comprising a liquid level detector, wherein a second mounting port (323) communicated with the accommodating cavity (O) is further disposed on the tank body (32), and the liquid level detector is disposed in the second mounting port (323) and is configured to detect a liquid level of the sample liquid to be detected.

10. The on-line collecting device for inorganic elements as claimed in any one of claims 3 to 5, wherein the number of said absorption devices (30) is two, wherein said gas outlet (321) of one of said absorption devices (30) is in communication with said gas inlet (311) of the other of said absorption devices (30) via a pipeline, wherein said gas inlet (311) of one of said absorption devices (30) is used for introducing said gas, and said gas outlet (321) of the other of said absorption devices (30) is used for discharging gas which is not absorbed and dissolved in said absorption liquid.

11. The on-line collection device of inorganic elements according to claim 1, wherein a pressure detection device (61) and a flow rate detection device (62) are provided between the gas supply device (40) and the absorption device (30).

12. The on-line collection device of inorganic elements according to claim 1, further comprising:

an electric control unit (50) arranged in the box body (10) and electrically connected with the gas supply device (40);

and the electromagnetic valve (80) is electrically connected with the electronic control unit (50), and the electromagnetic valve (80) is at least respectively communicated with the absorption device (30) and the dissolving liquid device (20).

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