CN112117180A - High-solidification-temperature gaseous component sampling device and sampling method - Google Patents
High-solidification-temperature gaseous component sampling device and sampling method Download PDFInfo
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- CN112117180A CN112117180A CN202011015193.XA CN202011015193A CN112117180A CN 112117180 A CN112117180 A CN 112117180A CN 202011015193 A CN202011015193 A CN 202011015193A CN 112117180 A CN112117180 A CN 112117180A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0409—Sample holders or containers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/0027—Methods for using particle spectrometers
- H01J49/0031—Step by step routines describing the use of the apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0422—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components for gaseous samples
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Abstract
The invention discloses a high-solidification temperature gaseous component sampling device and a sampling method, wherein the sampling device comprises a sampling tube, a sleeve and a gas flow control system; the sleeve is sleeved outside the sampling tube in a sealing manner; the sampling tube is used for sampling high-temperature gas generated in the experimental device in real time and sending the high-temperature gas to the mass spectrometer for analysis; protective gas flow channels with different sizes are arranged on the tube wall of the sampling tube, and the protective gas flow channels and the axial direction of the sampling tube form a certain angle to construct a spiral flow field in the sampling tube; the sleeve is used for constructing a protective gas flow channel, and is combined with protective gas flow channels with different sizes in the sampling tube, so that the stability of the spiral flow field can be ensured by controlling the flow of protective gas flow at different positions. The invention can be used for sampling high-temperature gaseous mixture, realizes real-time sampling analysis of an experimental device, can prevent fission products from being in contact with and adsorbed by a wall surface, can quantitatively obtain release transient data of the fission products under the condition of serious accidents, and effectively reduces the uncertainty of experimental results.
Description
Technical Field
The invention belongs to the technical field of nuclear power plant experiments, and particularly relates to a high-solidification-temperature gaseous component sampling device and a high-solidification-temperature gaseous component sampling method, which are applied to research of components and share of high-temperature gas under the condition of serious accidents.
Background
During a severe accident of a nuclear power plant, a reactor core is melted to generate high-temperature melt, and the high-temperature melt melts a lower seal head of a pressure vessel and enters the interior of a containment vessel. Besides fuel and structural materials, the high-temperature melt also contains fission products which are main sources of radioactivity in accidents. The fission product contains fission gas such as xenon, krypton and the like, volatile components such as iodine, cesium, bromine and the like, semi-volatile components such as molybdenum, rhodium, barium and the like, and low-volatile components such as strontium, yttrium and the like. Under high temperature conditions, fission products other than fission gases are also gradually released from the molten core to the external environment in the form of gas or vapor, resulting in radioactive emissions. The release of fission products is closely related to the temperature, the temperature of molten core materials can reach more than 2800 ℃, and volatile and semi-volatile components have higher release levels. While the release characteristics of the various components change significantly as the temperature decreases. Therefore, in facilities for investigating fission product release, the sampling device should operate at high temperatures and accurately analyze the composition and fraction of each component. In the existing research, a mass spectrometer is mainly used for on-line measurement of each component in gas, but due to the structural limitation of the mass spectrometer, the working temperature of the mass spectrometer is generally below 1300 ℃, the temperature difference between the mass spectrometer and a melting pool is large, and a more accurate measurement result is difficult to obtain.
Disclosure of Invention
In order to effectively reduce the uncertainty of experimental research on the release characteristics of fission products in serious accidents and provide a powerful support for the formulation of measures for relieving the serious accidents, the invention provides a high-freezing-temperature gaseous component sampling device. The inlet temperature of the invention can reach about 2500 ℃, and the invention can be used for the online sampling analysis of gas components in various fission product release characteristic experiments of different reactor types and different burning severe accidents.
The invention is realized by the following technical scheme:
a high freezing temperature gaseous component sampling device and sampling device, the sampling device includes sampling tube, thimble and gas flow control system;
the sleeve is hermetically sleeved outside the sampling tube;
the sampling tube is used for sampling high-temperature gas generated in the experimental device in real time and sending the high-temperature gas to the mass spectrometer for analysis;
protective gas flow channels with different sizes are arranged on the tube wall of the sampling tube, and the protective gas flow channels and the axial direction of the sampling tube form a certain angle to construct a spiral flow field in the sampling tube;
the sleeve is used for constructing a protective gas flow channel and is combined with protective gas flow channels with different sizes in the sampling tube, so that the stability of a spiral flow field can be ensured by controlling the flow of protective gas flow at different positions;
the gas flow control system is used for adjusting the proportion of the flow of the protective gas to the flow of the sampling gas.
According to the invention, by controlling the flow of the sampling gas and the protective gas, a special gas flow field is constructed in the sampling tube, so that fission products in the gas are prevented from contacting with the low-temperature sampling tube and being adsorbed on the wall surface, the temperature of the sampling gas is reduced, rear-end analysis equipment is protected, further, the sampling analysis of the fission products at high temperature can be realized, and the temperature of the fission products can reach 2500 ℃ at most.
The invention designs the following sampling tube with a special structure to construct a special gas flow field in the sampling tube and ensure that the high-temperature fission product is not contacted and adsorbed with the wall surface of the sampling tube.
Preferably, one end of the sampling tube is a sampling interface, and the other end of the sampling tube is an analysis interface;
the sampling interface is connected with a gas sampling port of the experimental device, and the analysis interface is connected with a mass spectrometer;
follow the axial direction of sampling tube is in layer sets up not unidimensional protective gas runner pore structure on the pipe wall of sampling tube, and the protective gas runner pore structure that the individual layer set up includes a plurality of runner holes that the pipe wall circumference of sampling tube evenly set up.
Preferably, the protective gas flow passage hole structure provided in a single layer of the present invention includes 6 flow passage holes uniformly provided in the circumferential direction of the tube wall of the sampling tube, which are a bottom gas flow passage hole, a left lower gas flow passage hole, a left upper gas flow passage hole, a top gas flow passage hole, a right upper gas flow passage hole, and a right lower gas flow passage hole, respectively.
Preferably, in the present invention, the diameter of the flow channel hole in each layer of the shielding gas flow channel hole structure is gradually increased along the direction from the sampling interface to the analysis interface of the sampling tube, the diameter of the bottom gas flow channel hole in the single-layer shielding gas flow channel hole structure is the largest, and the diameters of the lower gas flow channel hole, the upper gas flow channel hole and the top gas flow channel hole are sequentially decreased.
Preferably, the angle between the flow passage hole and the axial direction of the sampling tube is 70-80 degrees.
Preferably, the ratio of the diameter of the flow passage hole to the diameter of the sampling tube is 1: 4-1: 6.
Preferably, the sleeve has a two-layer sleeve structure, wherein the outer layer is a sleeve pipe shell, and the side surface of the sleeve pipe shell is provided with a protective gas interface; the inner layer is a tubular flow distributor, and the pipe wall of the tubular flow distributor is provided with a plurality of groups of flow distribution holes; a protective gas buffer cavity is arranged between the tubular flow distributor and the casing pipe shell;
one end of the casing pipe shell is provided with a sampling sealing port, and the other end of the casing pipe shell is provided with an analysis sealing port; the inner wall of the sampling sealing port can be in threaded sealing connection with the outer wall of the sampling port of the sampling tube; the inner wall of the analysis sealing port can be in threaded sealing connection with the outer wall of the analysis interface of the sampling tube; thereby mounting the sampling tube within the tubular flow distributor.
The sleeve of the invention is connected and sealed with the sampling tube through a thread sealing structure to prevent the leakage of protective gas.
Preferably, the gas flow control system is connected with the protective gas interface, and the flow of the protective gas is controlled by the control assembly, so that the flow of the protective gas is 1.5-3 times of the flow of the sampling gas. The invention adjusts the proportion of the protective gas flow and the sampling gas flow through the gas flow control system, thereby ensuring the stability of the fission product moving in the protective gas.
In another aspect, the present invention also provides a sampling method based on the high freezing temperature gas component sampling device as described above, the method comprising:
connecting a sampling interface of the sampling tube with a gas sampling port in an experimental device, and connecting an analysis interface of the sampling tube with a rear-end mass spectrometer;
when the fission product release characteristic experimental device reaches the experimental working condition, starting a mass spectrometer and simultaneously starting a gas flow control system to provide protective gas, wherein the mass spectrometer forms a negative pressure environment at an analysis interface, so that high-temperature gas in the experimental device enters a sampling tube;
calibrating the flow of the protective gas to obtain the flow of the protective gas applicable to the experimental working condition;
and carrying out experimental measurement according to a calibration program, and controlling the protective gas flow obtained by the calibration through a gas flow control system so as to ensure that the adsorption capacity of the fission product is smaller than a required value in the real-time sampling process, thereby realizing the sampling analysis of the fission product.
Preferably, the calibration process of the flow of the shielding gas of the present invention is as follows:
adjusting the flow of the protective gas, operating for a period of time, taking out the sampling tube, and analyzing the components of the inner wall of the sampling tube to obtain the adsorption quantity of fission products in the wall;
through the test of the wall surface adsorption capacity of the sampling tube under different protective gas flow conditions, the protective gas flow suitable for the test working condition is obtained, and the protective gas flow calibration is completed.
The invention has the following advantages and beneficial effects:
the sampling device provided by the invention can be used for experimental research on the release characteristics of fission products in severe accidents of reactors. The invention can carry out sampling analysis on fission products at high temperature, and the temperature of the fission products can reach 2500 ℃ at most.
The sampling device can be used for sampling high-temperature gaseous mixtures, realizes real-time sampling analysis of an experimental device, can prevent fission products from being in contact with and adsorbed by a wall surface, can quantitatively obtain release transient data of the fission products under the condition of serious accidents, and effectively reduces uncertainty of experimental results. The invention can reduce the temperature of high-temperature gas and prevent the high-temperature gas from damaging a mass spectrometer.
The invention can be used for experimental research on the release characteristics of the fission products in the fuel rod under the condition of serious accidents, provides powerful support for the management of the serious accidents and the formulation of relieving measures, and is favorable for improving the safety of a novel high-power nuclear power reactor.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic view of the overall structure of the sampling device of the present invention.
FIG. 2 is a schematic view of the sampling tube structure of the present invention. The left drawing is an axial sectional view of the sampling tube, and the right drawing is a radial sectional view of the sampling tube.
Fig. 3 is a schematic view of the structure of the bushing of the present invention.
Reference numbers and corresponding part names in the drawings:
1 is a sampling tube, 1-1 is a sampling interface, 1-2 is an analysis interface, 1-3 is a protective gas runner hole structure, 1-3-1 is a bottom gas runner hole, 1-3-2 is a left lower runner hole 1-3-2, 1-3-3 is a left upper runner hole, 1-3-4 is a top runner hole, 1-3-5 is a right upper runner hole 1-3-2, 1-3-6 is a right lower runner hole, 1-4 is a sampling port screw thread, 1-5 is an analysis port screw thread, 2 is a sleeve, 2-1 is a sampling seal port, 2-2 is an analysis seal port, 2-3 is a sleeve pipe shell, 2-4 is a protective gas cavity, 2-5 is a tubular flow distributor, 2-6 is a flow distribution hole, 2-7 is a protective gas interface, 2-8 is a sampling sealing thread, 2-9 is an analysis sealing thread, and 3 is a gas flow control system.
Detailed Description
Hereinafter, the term "comprising" or "may include" used in various embodiments of the present invention indicates the presence of the invented function, operation or element, and does not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
In order to effectively reduce the uncertainty of experimental research on the release characteristics of fission products in a serious accident and provide a powerful support for making serious accident mitigation measures, the embodiment provides the high-freezing-temperature gaseous component sampling device. The sampling device of this embodiment constructs the special gas flow field in the sampling tube through controlling sample gas and protective gas flow, prevents that fission product in the gas from contacting with low temperature sampling tube and adsorbing in the wall, reduces sample gas temperature simultaneously, protection rear end analytical equipment.
As shown in fig. 1, the sampling device of the present embodiment includes: a sampling tube 1, a sleeve 2 and a gas flow control system 3;
wherein the sampling end of the sampling tube 1 is connected with a sampling interface on the experimental device, and the analysis end is connected with a rear-end mass spectrometer. The sampling tube 1 is provided with a protective gas flow passage which forms a certain angle with the sampling tube and is used for constructing a spiral flow field in the sampling tube and preventing fission products from contacting with a pipeline and being adsorbed.
The sleeve 2 is used for constructing a protective gas circulation channel, and protective gas flow in different positions can be controlled by combining protective gas flow channels with different sizes in the sampling tube 1, so that the stability of a flow field is ensured, and the fission product is prevented from being in contact with and adsorbed on the wall surface. The sleeve 2 is connected and sealed with the sampling tube by a screw seal structure to prevent leakage of the shielding gas.
The gas flow control system 3 is used for adjusting the proportion of the protective gas flow to the sampling gas flow, thereby ensuring the stability of the movement of the fission product in the gas.
The sampling tube 1 material of this embodiment is zirconia, and according to the experiment needs, the sampling tube can be designed into different diameters to satisfy the requirement of sample gas flow in the different experiments.
Specifically, as shown in fig. 2, one end of the sampling tube 1 of the present embodiment is a sampling interface 1-1, and the other end of the sampling tube is an analysis interface 1-2; the outer wall of the sampling interface 1-1 is provided with sampling port threads 1-4, and the outer wall of the analysis interface 1-2 is provided with analysis port threads 1-5.
The sampling interface 1-1 is connected with a gas sampling port of the experimental device, and the analysis interface 1-2 is connected with a mass spectrometer.
Protective gas flow passage hole structures 1-3 with different sizes are arranged on the pipe wall of the sampling pipe 1 in a layered mode along the axial direction of the sampling pipe 1, and the protective gas flow passage hole structures 1-3 arranged in a single layer mode comprise a plurality of flow passage holes evenly arranged on the circumference of the pipe wall of the sampling pipe. The protective gas flow channel hole structure 1-3 arranged in a single layer in this embodiment includes 6 flow channel holes uniformly arranged in the circumferential direction of the tube wall of the sampling tube, which are respectively a bottom gas flow channel hole 1-3-1, a left lower gas flow channel hole 1-3-2, a left upper gas flow channel hole 1-3-3, a top gas flow channel hole 1-3-4, a right upper gas flow channel hole 1-3-5, and a right lower gas flow channel hole 1-3-6, as shown in the right diagram of fig. 2.
The angle between the gas flow passage hole and the axial direction of the sampling tube is 70-80 degrees; the ratio of the diameter of the gas flow passage hole to the diameter of the sampling tube 1 is 1: 4-1: 6, and the diameters of the gas flow passage hole in the axial direction and the circumferential direction of the sampling tube 1 are different. The diameter of the flow channel hole in each layer of protective gas flow channel hole structure 1-3 is gradually increased along the direction (axial direction) from the sampling interface 1-1 to the analysis interface 1-2 of the sampling tube 1, the diameter of the bottom gas flow channel hole 1-3-1 in the single-layer protective gas flow channel hole structure 1-3 is the largest, and the diameters of the lower gas flow channel hole (1-3-2, 1-3-6), the upper gas flow channel hole (1-3-3, 1-3-5) and the top gas flow channel hole (1-3-4) are sequentially reduced; through calculation and analysis, the diameter ratio of the bottom gas flow passage hole 1-3-1, the lower gas flow passage hole (1-3-2, 1-3-6), the upper gas flow passage hole (1-3-3, 1-3-5) and the top gas flow passage hole 1-3-4 is within the range of (2-1.5): (1.5-1): (0.8-0.6): (0.5-0.3).
As shown in fig. 3, the sleeve 2 of the present embodiment is a two-layer tubular sleeve structure, and is made of Inconel 600 material; wherein the outer layer is a casing pipe shell 2-3, and the side surface of the casing pipe shell 2-3 is provided with a protective gas interface 2-7; the inner layer is a tubular flow distributor 2-5, and the pipe wall of the tubular flow distributor 2-5 is provided with a plurality of groups of flow distribution holes 2-6; a protective gas buffer cavity 2-4 is arranged between the tubular flow distributor 2-5 and the casing pipe shell 2-3 and is used for balancing the protective gas pressure.
One end of the casing tube shell 2-3 is provided with a sampling sealing port 2-1, and the other end is provided with an analysis sealing port 2-2; the inner wall of the sampling sealing port 2-1 can be in threaded sealing connection with the outer wall of the sampling port 1-1 of the sampling tube 1; the inner wall of the analysis sealing port 2-2 can be in threaded sealing connection with the outer wall of the analysis interface 1-2 of the sampling tube 1 (namely, the sampling sealing port 2-1 and the analysis sealing port 2-2 are respectively provided with a sampling sealing thread 2-8 and an analysis sealing thread 2-9 which are matched with a sampling port thread 1-4 and an analysis port thread 1-5 on the sampling tube for sealing); thereby mounting the sampling tube 1 within the tubular flow distributor 2-5.
The sleeve 2 of the present embodiment is connected and sealed with the sampling tube by a screw seal structure to prevent leakage of the shielding gas.
The gas flow control system 3 of this embodiment is connected with the shielding gas interface 2-7, controls the shielding gas flow through the control assembly, makes the shielding gas flow be 1.5 ~ 3 times of the sample gas flow for guarantee the stability of fission product motion in the shielding gas.
The sampling device of the embodiment can realize low-loss sampling of high-temperature gaseous mixtures below 2500 ℃, and can reduce the inlet temperature of a mass spectrometer so as to meet the requirement of real-time sampling of high-temperature gas in a fission product release experiment. The sampling device of the embodiment uses common materials, has low cost, convenient processing and easy installation and operation, and is very suitable for the research of the release characteristics of fission products.
Example 2
In this embodiment, the high freezing temperature gas component sampling device provided in the above embodiment 1 is applied to real-time sampling analysis of high temperature gas in different reactor fission product release experimental devices, and the specific process is as follows:
the sampling interface 1-1 of the sampling tube 1 of the assembled sampling device is connected with a gas sampling point in the experimental device, and the analysis interface 1-2 is connected with a rear-end mass spectrum.
And after the fission product release characteristic experimental device reaches the experimental working condition, starting the mass spectrometer and simultaneously starting the gas flow control system to provide the protective gas.
The mass spectrometer forms a negative pressure environment at the analysis interface, so that high-temperature gas in the experimental device enters the sampling port.
Then the flow of the protective gas is adjusted and the operation is carried out for a period of time, and then the sampling tube 1 is taken out to analyze the composition of the inner wall of the tube so as to obtain the adsorption quantity of the fission product in the wall surface. Through the test of the adsorption value of the sampling tube 1 under different protective gas flow conditions, the protective gas flow suitable for the working condition is obtained, and the protective gas flow calibration is completed.
And carrying out experimental measurement, heating the sample to be measured to the experimental temperature, and adjusting the flow of the protective gas through the gas flow control system to enable the flow of the protective gas to be close to the flow of the calibration protective gas, so as to ensure that the adsorption capacity of the fission product is smaller than a required value in the real-time sampling process, and further realize the sampling analysis of the fission product.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A high freezing temperature gaseous component sampling device is characterized by comprising a sampling tube (1), a sleeve (2) and a gas flow control system (3);
the sleeve (2) is hermetically sleeved outside the sampling tube (1);
the sampling tube (1) is used for sampling high-temperature gas generated in an experimental device in real time and sending the high-temperature gas to a mass spectrometer for analysis;
protective gas flow channels with different sizes are arranged on the tube wall of the sampling tube (1), and the protective gas flow channels and the axial direction of the sampling tube (1) form a certain angle to construct a spiral flow field in the sampling tube (1);
the sleeve (2) is used for constructing a protective gas flow channel and is combined with protective gas flow channels with different sizes in the sampling tube (1), so that the stability of a spiral flow field can be ensured by controlling the flow of protective gas flow at different positions;
the gas flow control system (3) is used for adjusting the proportion of the flow of the protective gas to the flow of the sampling gas.
2. The high freezing temperature gaseous component sampling device according to claim 1, wherein one end of the sampling tube (1) is a sampling interface (1-1), and the other end of the sampling tube (1) is an analysis interface (1-2);
the sampling interface (1-1) is connected with a gas sampling port of an experimental device, and the analysis interface (1-2) is connected with a mass spectrometer;
the axial direction of following sampling tube (1) is in layer sets up not unidimensional protective gas flow path pore structure (1-3) on the pipe wall of sampling tube (1), and protective gas flow path pore structure (1-3) that the individual layer set up include a plurality of flow path holes that the pipe wall circumference of sampling tube (1) evenly set up.
3. The high solidification temperature gaseous component sampling device of claim 2, wherein the protective gas flow channel hole structure (1-3) arranged in a single layer comprises 6 flow channel holes uniformly arranged in the circumferential direction of the tube wall of the sampling tube (1), namely a bottom gas flow channel hole (1-3-1), a left lower gas flow channel hole (1-3-2), a left upper gas flow channel hole (1-3-3), a top gas flow channel hole (1-3-4), a right upper gas flow channel hole (1-3-5) and a right lower gas flow channel hole (1-3-6).
4. The high freezing temperature gaseous component sampling device according to claim 3, wherein the diameter of the flow channel holes in each layer of shielding gas flow channel hole structure (1-3) is gradually increased along the direction from the sampling port (1-1) to the analysis port (1-2) of the sampling tube (1), the diameter of the bottom gas flow channel hole in the single layer of shielding gas flow channel hole structure (1-3) is the largest, and the diameters of the lower gas flow channel hole, the upper gas flow channel hole and the top gas flow channel hole are sequentially decreased.
5. A high freezing temperature gaseous component sampling device according to any one of claims 2 to 4, wherein the angle between the flow passage hole and the axial direction of the sampling tube (1) is 70 to 80 °.
6. The device for sampling a gaseous component with a high freezing temperature according to any one of claims 2 to 4, wherein the ratio of the diameter of the flow passage hole to the diameter of the sampling tube is 1:4 to 1: 6.
7. A high freezing temperature gaseous component sampling device according to any one of claims 2-4, wherein the casing (2) is a two-layer sleeve structure, wherein the outer layer is a casing shell (2-3), and the side of the casing shell (2-3) is provided with a protective gas interface (2-7); the inner layer is a tubular flow distributor (2-5), and the pipe wall of the tubular flow distributor (2-5) is provided with a plurality of groups of flow distribution holes (2-6); a protective gas buffer cavity (2-4) is arranged between the tubular flow distributor (2-5) and the casing pipe shell (2-3);
one end of the casing tube (2-3) is provided with a sampling sealing port (2-1), and the other end is provided with an analysis sealing port (2-2); the inner wall of the sampling sealing port (2-1) can be in threaded sealing connection with the outer wall of the sampling port (1-1) of the sampling tube (1); the inner wall of the analysis sealing port (2-2) can be in threaded sealing connection with the outer wall of the analysis port (1-2) of the sampling tube (1); thereby mounting the sampling tube (1) within the tubular flow distributor (2-5).
8. The device for sampling a gaseous component with a high freezing temperature according to claim 7, wherein the gas flow control system (3) is connected to the shielding gas ports (2-7), and the flow of the shielding gas is controlled by the control assembly, so that the flow of the shielding gas is 1.5-3 times of the flow of the sampling gas.
9. A sampling method based on the high freezing temperature gas component sampling device according to any one of claims 1 to 8, characterized in that the method comprises:
connecting a sampling interface (1-1) of the sampling tube (1) with a gas sampling interface in an experimental device, and connecting an analysis interface (1-2) of the sampling tube (1) with a rear-end mass spectrometer;
when the fission product release characteristic experiment device reaches an experiment working condition, starting a mass spectrometer and simultaneously starting a gas flow control system (3) to provide protective gas, wherein the mass spectrometer forms a negative pressure environment at an analysis interface (1-2), so that high-temperature gas in the experiment device enters a sampling tube (1);
calibrating the flow of the protective gas to obtain the flow of the protective gas applicable to the experimental working condition;
and carrying out experimental measurement according to a calibration program, and controlling the protective gas flow obtained by the calibration through a gas flow control system so as to ensure that the adsorption capacity of the fission product is smaller than a required value in the real-time sampling process, thereby realizing the sampling analysis of the fission product.
10. The sampling method according to claim 9, wherein the shielding gas flow calibration process is as follows:
adjusting the flow of the protective gas, operating for a period of time, taking out the sampling tube (1), and analyzing the components of the inner wall of the sampling tube (1) to obtain the adsorption quantity of fission products in the wall surface;
the protective gas flow suitable for the experimental working condition is obtained through the test of the wall adsorption capacity of the sampling tube (1) under different protective gas flow conditions, and then the protective gas flow calibration is completed.
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| GB1505989A (en) * | 1975-05-09 | 1978-04-05 | Gardner N | Sampling probe |
| US4154664A (en) * | 1976-04-16 | 1979-05-15 | Regie Natinale Des Usines Renault | Probe for measuring gaseous components |
| US6021678A (en) * | 1998-05-27 | 2000-02-08 | Kennecott Utah Copper Corporation | Apparatus for transporting emissions from a stack |
| US6177669B1 (en) * | 1998-09-28 | 2001-01-23 | Varian, Inc. | Vortex gas flow interface for electrospray mass spectrometry |
| CN101432613A (en) * | 2006-05-09 | 2009-05-13 | 住友精化株式会社 | Sample introduction system |
| US20100186523A1 (en) * | 2006-01-13 | 2010-07-29 | Hannu Vesala | Diluting sampler and a method for collecting and diluting a gaseous sample |
| US20140283626A1 (en) * | 2013-03-15 | 2014-09-25 | Gary Michael McMurtry | Tubular membrane gas and volatile compounds sampler for fluid introduction at atmospheric to high pressure |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1505989A (en) * | 1975-05-09 | 1978-04-05 | Gardner N | Sampling probe |
| US4154664A (en) * | 1976-04-16 | 1979-05-15 | Regie Natinale Des Usines Renault | Probe for measuring gaseous components |
| US6021678A (en) * | 1998-05-27 | 2000-02-08 | Kennecott Utah Copper Corporation | Apparatus for transporting emissions from a stack |
| US6177669B1 (en) * | 1998-09-28 | 2001-01-23 | Varian, Inc. | Vortex gas flow interface for electrospray mass spectrometry |
| US20100186523A1 (en) * | 2006-01-13 | 2010-07-29 | Hannu Vesala | Diluting sampler and a method for collecting and diluting a gaseous sample |
| CN101432613A (en) * | 2006-05-09 | 2009-05-13 | 住友精化株式会社 | Sample introduction system |
| US20140283626A1 (en) * | 2013-03-15 | 2014-09-25 | Gary Michael McMurtry | Tubular membrane gas and volatile compounds sampler for fluid introduction at atmospheric to high pressure |
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