A method and device for directly measuring radon based on activated carbon adsorption and desorption

Abstract

The present application relates to active carbon radon measurement technical field, specifically to a kind of direct radon measurement method and device based on active carbon adsorption and analysis, its method includes the following steps: active carbon core burying, radon gas heating release, radon-containing gas drying operation, filter filtration and radon content measurement, its device includes body assembly, the upper end of the shell assembly is connected with thermostat controller, the shell assembly is equipped with carbon core heating mechanism, the lower end of the shell assembly two sides is equipped with gas flow mechanism through the public.The present application introduces the direct radon measurement method of active carbon adsorption and analysis, by directly placing the active carbon core to be measured radon into radon measurement device for constant temperature heating degassing, to obtain radon directly to directly measure radon, greatly shorten the measurement time, with the advantages of high efficiency, small error, strong anti-interference ability, greater detection depth and simple operation.

Description

Technical Field

[0001] This invention relates to the field of activated carbon radon measurement technology, and in particular to a direct radon measurement method and apparatus based on activated carbon adsorption and desorption. Background Technology

[0002] Radon and its decay product measurements are important direct detection methods for uranium mineralization information in uranium exploration. These methods include both instantaneous and cumulative measurements, and the soil radon concentration characteristics obtained by these two methods are generally consistent. For surface or shallow uranium deposits, the area corresponding to the anomaly range of soil radon concentration corresponds to the ore body. However, for deep uranium deposits, due to the influence of the overburden geological environment, the area corresponding to the anomaly range of soil radon concentration obtained by traditional radon measurement methods often does not correspond to the deep ore body. Characterizing soil radon concentration anomalies in hydrothermal uranium deposits is related to fault structures. Soil radon indicative of sandstone uranium deposits often exhibits characteristics such as "bimodal" profile anomalies and low anomalies sandwiched between ring-like anomalies. These anomaly characteristics present significant ambiguity when inferring mineralization in unknown new areas, making interpretation and inference difficult.

[0003] In summary, the main reason why traditional radon measurement methods are difficult to accurately identify and delineate deep uranium deposits is that traditional surface radon measurement can basically not predict the longitudinal anomaly trend of radon.

[0004] A three-dimensional radon measurement method based on activated carbon adsorption, disclosed in CN108241166B, includes the following steps: selecting a measurement area and determining the grid of points and lines within the area; setting the kilometer grid coordinates of the measurement points; setting and calibrating the activated carbon radon measuring instrument by setting the measurement cycle; locating and marking the measurement points according to their latitude and longitude coordinates; performing stability checks on the activated carbon radon measuring instrument and background measurements of the measurement system; burying the activated carbon adsorption device in the field; removing the activated carbon adsorption device and obtaining the radon concentration value of the soil at the measurement point; data processing to determine the lower limit of the three-dimensional radon concentration anomaly, the lower limit of the three-dimensional radon concentration high value, the lower limit of the three-dimensional radon concentration slightly higher value anomaly, and the average radon concentration in three-dimensional space, and drawing a three-dimensional radon concentration isopleth map. This invention solves the technical problem that existing radon measurement methods cannot predict the longitudinal anomaly trend of radon, obtains the soil radon concentration at different locations in three-dimensional space, and realizes the identification and delineation of deep uranium mineralization information.

[0005] In existing technical solutions, traditional radon measurement methods do not employ the method of directly heating and degassing the radon-containing activated carbon core under constant temperature, resulting in long measurement times and low efficiency. Furthermore, the measurement process is affected by various factors, leading to significant errors and insufficient accuracy and reliability. The methods also exhibit weak anti-interference capabilities, causing measurement results to easily deviate from the true value. Additionally, the detection depth is limited, making it difficult to obtain radon concentration information from deeper locations. Moreover, the operation process is cumbersome, requiring high levels of technical skill and experience from operators, making it unsuitable for widespread application and operation. Therefore, improvements are needed. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a direct radon measurement method and apparatus based on activated carbon adsorption and desorption.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A direct radon determination method based on activated carbon adsorption and desorption includes the following steps:

[0009] S1. Activated carbon core placement: The activated carbon core is placed at an appropriate depth in the soil sample to be tested to achieve radon adsorption; this process needs to be sustained for a certain period of time to ensure that the activated carbon core can fully adsorb radon in the soil.

[0010] S2. Radon Heating and Release: After the adsorption process is complete, the activated carbon core is removed. Subsequently, the activated carbon core can be placed in a sealed shell with a constant and controllable temperature for heating to release the adsorbed radon. This process requires precise control of temperature and time to ensure complete radon release while avoiding damage to the activated carbon core.

[0011] S3. Radon-containing gas drying operation: The radon-containing gas, after being mixed with the air in the sealed shell, is dried through a drying tube to remove excess moisture from the radon-containing gas. The design and use of the drying tube are based on the physical principle of gas drying. By selecting a suitable desiccant and controlling the gas flow rate, the drying effect is ensured.

[0012] S4. Filtering: The dried radon-containing gas needs to be filtered through a filter to remove radon progeny.

[0013] S5. Radon content measurement: Filtered radon-containing gas is passed into a radon detector to measure the radon content and obtain the required data results; the accuracy and reliability of the measurement results are ensured by precisely controlling the measurement conditions and data processing.

[0014] Compared with existing technologies, this application clearly and explicitly demonstrates how to perform radon testing using activated carbon cores, and describes the corresponding steps, making it easier for those skilled in the art to operate and improving work efficiency and quality.

[0015] The present invention also proposes a direct radon measurement device based on activated carbon adsorption and desorption, including a shell assembly, a constant temperature control assembly connected to the upper end of the shell assembly, a carbon core heating assembly inside the shell assembly, and a gas flow mechanism that runs through both sides of the lower end of the shell assembly. A drying tube assembly, a radon meter assembly, and a filter assembly are sequentially arranged through the gas flow mechanism.

[0016] A gas delivery pipe is provided between the drying tube assembly and the radon detector assembly;

[0017] The gas pump assembly is mounted on top of the filter assembly.

[0018] Compared with existing technologies, this invention transforms the direct radon measurement method based on activated carbon adsorption and desorption into a device structure. It allows for the direct acquisition of radon gas for measurement by placing the radon-containing activated carbon core to be measured directly into the radon measuring device for isothermal heating and degassing. This significantly shortens the measurement time and offers advantages such as high efficiency, low error, strong anti-interference capability, large detection depth, and ease of operation.

[0019] Preferably, the constant temperature control device includes a heating core assembly disposed inside the housing assembly, the upper end of the heating core assembly penetrating the housing assembly and extending to the upper end of the housing assembly;

[0020] The upper end of the heating core assembly is connected to a connecting wire, and one end of the connecting wire is connected to a constant temperature control component.

[0021] Furthermore, it facilitates precise monitoring of the temperature inside the activated carbon core, ensuring rapid radon gas release.

[0022] Preferably, the detection device includes a filter assembly disposed on the radon detector assembly, the filter assembly extending into the drying tube assembly.

[0023] Furthermore, it facilitates accurate measurement of radon gas concentration, ensuring the precision of the detection.

[0024] Preferably, the gas flow mechanism includes two connecting pipes that pass through both sides of the lower end of the housing assembly. One side of each connecting pipe is connected to a discharge check valve and an input check valve, respectively. One side of the discharge check valve is connected to an exhaust pipe, and the exhaust pipe is connected to the drying pipe assembly.

[0025] One end of the input check valve is connected to an air supply pipe, which is connected to the upper side of the filter assembly.

[0026] Furthermore, it allows for full control of gas flow, making it easier to remove impurities.

[0027] The beneficial effects of this invention are:

[0028] 1. This application has high sensitivity and high accuracy, and is easy to detect weak anomalies. This feature is because the activated carbon core has a very strong adsorption capacity for radon. The activated carbon core is an integral cumulative adsorber. The measurement results of the activated carbon core decay very slowly over time, which makes it easy to extend the counting time or increase the number of measurements to improve the measurement accuracy. The amount of activated carbon in the activated carbon core can be easily increased to increase the adsorption capacity.

[0029] 2. This application has strong anti-interference ability, which is conducive to extracting useful information and belongs to the cumulative radon measurement method; the activated carbon core is buried underground for static adsorption, which can eliminate or homogenize the influence of natural conditions such as meteorological changes;

[0030] 3. The device in this application has a large detection depth, making it easy to explore deep and blind deposits; the activated carbon core adsorbs radon in both deep and shallow areas for a longer period of time, which makes it easier to detect deep mineral deposits and solve related problems compared with short-term collection methods;

[0031] 4. The device described in this application has low preparation and usage costs, is easy to operate, and is conducive to promotion;

[0032] 5. The present invention has high radon measurement efficiency; the radon-containing activated carbon core is heated and degassed at a constant temperature by a constant temperature controller, thereby directly obtaining radon gas for direct radon measurement. Attached Figure Description

[0033] Figure 1 This is a flowchart illustrating the steps of a direct radon measurement method based on activated carbon adsorption and desorption proposed in this invention.

[0034] Figure 2 This is a structural diagram of a direct radon measurement device based on activated carbon adsorption and desorption proposed in this invention;

[0035] In the diagram: 1 Activated carbon core assembly, 2 Shell assembly, 3 Exhaust check valve, 4 Inlet base assembly, 5 Inlet check valve, 6 Connecting pipe, 7 Heating core assembly, 8 Connecting wire, 9 Temperature control assembly, 10 Radon meter assembly, 11 Drying tube assembly, 12 Filter assembly, 13 Gas delivery pipe, 14 Gas supply pipe, 15 Exhaust pipe. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Reference Figure 1 A direct radon determination method based on activated carbon adsorption and desorption includes the following steps:

[0038] S1. Activated carbon core placement: The activated carbon core is placed at an appropriate depth in the soil sample to be tested to achieve radon adsorption; this process needs to be sustained for a certain period of time to ensure that the activated carbon core can fully adsorb radon in the soil.

[0039] S2. Radon Heating and Release: After the adsorption process is complete, the activated carbon core is removed. Subsequently, the activated carbon core can be placed in a sealed shell with a constant and controllable temperature for heating to release the adsorbed radon. This process requires precise control of temperature and time to ensure complete radon release while avoiding damage to the activated carbon core.

[0040] S3. Radon-containing gas drying operation: The radon-containing gas, after being mixed with the air in the sealed shell, is dried through a drying tube to remove excess moisture from the radon-containing gas. The design and use of the drying tube are based on the physical principle of gas drying. By selecting a suitable desiccant and controlling the gas flow rate, the drying effect is ensured.

[0041] S4. Filtering: The dried radon-containing gas needs to be filtered through a filter to remove radon progeny.

[0042] S5. Radon content measurement: Filtered radon-containing gas is passed into a radon detector to measure the radon content and obtain the required data results; the accuracy and reliability of the measurement results are ensured by precisely controlling the measurement conditions and data processing.

[0043] Reference Figure 2 The present invention also proposes a direct radon measurement device based on activated carbon adsorption and desorption, including a shell assembly 2, a constant temperature control assembly 9 connected to the upper end of the shell assembly 2, a heating core assembly 7 inside the shell assembly 2, and a gas flow mechanism that runs through both sides of the lower end of the shell assembly 2. A drying tube assembly 11, a radon meter assembly 10, and a filter assembly 10 are sequentially arranged through the gas flow mechanism. The direction of gas flow is fully controlled to make the gas flow in a directional manner so that the gas can flow through the mechanism sufficiently to facilitate the detection of radon gas content.

[0044] A gas supply pipe 13 runs through the drying tube assembly 11 and the radon detector assembly 10, which can fully ensure the flow of gas for drying operations. The radon detector assembly 10 is installed at the lower end of the filter assembly 12 to ensure that the gas can circulate at a stable flow rate, so as to effectively achieve gas drying and filtration.

[0045] Reference Figure 2 The constant temperature control device includes a heating core assembly 7 disposed inside the housing assembly 2, with the upper end of the heating core assembly 7 penetrating through the housing assembly 2 and extending to the upper end of the housing assembly 2; this facilitates accurate detection of the radon gas content.

[0046] The upper end of the detection component 7 is connected to a connecting wire 8, and one end of the connecting wire 8 is connected to a constant temperature control component 9, which can effectively control the temperature.

[0047] Reference Figure 2 The carbon core heating device includes an activated carbon core component 1 disposed within the housing component 2, a detection mechanism extending into the activated carbon core component 1, and an air inlet base component 4 abutting the lower end of the activated carbon core component 1. The air inlet base component 4 is installed at the bottom within the housing component 2. The device is heated sufficiently so that the gas adsorbed by the activated carbon is discharged.

[0048] Reference Figure 2 The gas flow mechanism includes two connecting pipes 6 that pass through both sides of the lower end of the housing assembly 2. One side of each connecting pipe 6 is connected to a discharge check valve 3 and an input check valve 5, respectively. One side of the discharge check valve 3 is connected to an exhaust pipe 15, which is connected to the drying pipe assembly 11. The direction of gas flow can be precisely controlled through the check valves.

[0049] One end of the input check valve 5 is connected to the air supply pipe 14, which is connected to the upper side of the filter assembly 12, effectively realizing the directional flow of gas so as to fully dry and remove impurities from the gas.

[0050] In this invention, the activated carbon core is buried at an appropriate depth in the soil sample to be tested in order to achieve the adsorption of radon; this process needs to be sustained for a certain period of time to ensure that the activated carbon core can fully adsorb the radon in the soil.

[0051] After the adsorption process is complete, the activated carbon core is removed. Subsequently, the activated carbon core can be placed in a sealed shell with a constant and controllable temperature for heating to release the adsorbed radon. This process requires precise control of temperature and time to ensure complete radon release while avoiding damage to the activated carbon core.

[0052] The radon-containing gas, after being mixed with air in the sealed shell, is dried through a drying tube to remove excess moisture. The design and use of the drying tube are based on the physical principle of gas drying, and the drying effect is ensured by selecting a suitable desiccant and controlling the gas flow rate.

[0053] The dried radon-containing gas needs to be filtered to remove radon progeny.

[0054] Filtered radon-containing gas is passed into a radon detector to measure the radon content and obtain the required data results. The accuracy and reliability of the measurement results are ensured by precisely controlling the measurement conditions and data processing.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A direct radon determination method based on activated carbon adsorption and desorption, characterized in that, Includes the following steps: S1. Activated carbon core placement: The activated carbon core is placed at an appropriate depth in the soil sample to be tested to achieve the adsorption of radon. This process needs to last for a certain period of time to ensure that the activated carbon core can fully adsorb radon in the soil; S2, Radon gas precipitation by heating: After the adsorption process is completed, the activated carbon core is removed; Subsequently, the activated carbon core can be placed in a sealed outer shell with a constant and controllable temperature for heating to release the adsorbed radon. This process requires precise control of temperature and time to ensure complete radon release while avoiding damage to the activated carbon core. S3. Radon-containing gas drying operation: The radon-containing gas, after being mixed with the air in the sealed shell, is dried through a drying tube to remove excess moisture from the radon-containing gas. The design and use of the drying tube are based on the physical principle of gas drying. By selecting a suitable desiccant and controlling the gas flow rate, the drying effect is ensured. S4. Filtering: The dried radon-containing gas needs to be filtered through a filter to remove radon progeny. S5. Radon content measurement: Filtered radon-containing gas is passed into a radon detector to measure the radon content and obtain the required data results; the accuracy and reliability of the measurement results are ensured by precisely controlling the measurement conditions and data processing.

2. A direct radon measurement device based on activated carbon adsorption and desorption, characterized in that: It includes a housing assembly (2), the upper end of which is connected to a constant temperature control assembly (9), a carbon core heating assembly is provided inside the housing assembly (2), and a gas flow mechanism is provided through both sides of the lower end of the housing assembly (2). A drying tube assembly (11), a radon meter assembly (10) and a filter assembly (12) are sequentially provided through the gas flow mechanism. A gas delivery pipe (13) is provided through both the drying tube assembly (11) and the radon meter assembly (10); The radon meter assembly (10) is installed at the lower end of the filter assembly (12).

3. The method and apparatus for direct radon determination based on activated carbon adsorption and desorption according to claim 2, characterized in that: The detection mechanism includes a heating core assembly (7) disposed inside the housing assembly (2), the upper end of the heating core assembly (7) penetrating the housing assembly (2) and extending to the upper end of the housing assembly (2); The upper end of the heating core assembly (7) is connected to a connecting line (8), and one end of the connecting line (8) is connected to a constant temperature control assembly (9).

4. The method and apparatus for direct radon determination based on activated carbon adsorption and desorption according to claim 2, characterized in that: The carbon core heating mechanism includes an activated carbon core assembly (1) disposed within the housing assembly (2), the detection mechanism extends into the activated carbon core assembly (1), the lower end of the activated carbon core assembly (1) abuts against an air intake base assembly (4), and the air intake base assembly (4) is installed at the bottom within the housing assembly (2).

5. The method and apparatus for direct radon determination based on activated carbon adsorption and desorption according to claim 2, characterized in that: The gas flow mechanism includes two connecting pipes (6) that pass through both sides of the lower end of the housing assembly (2). One side of each connecting pipe (6) is connected to a discharge check valve (3) and an input check valve (5). One side of the discharge check valve (3) is connected to an exhaust pipe (15). The exhaust pipe (15) is connected to the drying pipe assembly (11). One end of the input check valve (5) is connected to an air supply pipe (14), which is connected to the upper side of the filter assembly (12).

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