GB2619362A - In-situ measurement device for marine radon and measurement method thereof - Google Patents

In-situ measurement device for marine radon and measurement method thereof Download PDF

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Publication number
GB2619362A
GB2619362A GB2212008.3A GB202212008A GB2619362A GB 2619362 A GB2619362 A GB 2619362A GB 202212008 A GB202212008 A GB 202212008A GB 2619362 A GB2619362 A GB 2619362A
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United Kingdom
Prior art keywords
gas
radon
measurement device
assembly
situ measurement
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GB2212008.3A
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GB202212008D0 (en
Inventor
Xu Bochao
Cheng Kai
Guo Jinjia
Li Meng
Yu Songling
Zhao Shibin
Li Chunqian
Yang Tong
Chen Guangquan
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Ocean University of China
First Institute of Oceanography MNR
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Ocean University of China
First Institute of Oceanography MNR
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Publication of GB202212008D0 publication Critical patent/GB202212008D0/en
Publication of GB2619362A publication Critical patent/GB2619362A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—Specially adapted to detect a particular component
    • G01N33/0055—Specially adapted to detect a particular component for radionuclides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1886—Water using probes, e.g. submersible probes, buoys
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/167—Measuring radioactive content of objects, e.g. contamination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/17—Circuit arrangements not adapted to a particular type of detector
    • G01T1/178—Circuit arrangements not adapted to a particular type of detector for measuring specific activity in the presence of other radioactive substances, e.g. natural, in the air or in liquids such as rain water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
    • G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

An in-situ measurement device for marine radon includes a degassing assembly 2 and a measurement assembly 3 located in an underwater docking cabin. The degassing assembly 2 is used for separating gas from seawater using a gas extraction tube 23, and the measurement assembly includes a drying section 31, 32 and a measuring section 34, 35. The drying section is configured for removing moisture in the gas, and the measuring section is configured for carrying out an in-situ measurement on radon in the dried gas. An exhaust port of the degassing assembly, the drying section and the measuring section are in sequential communication in a flowing direction of the gas. Gas from the measuring section is returned to the degassing assembly to mix with water and be discharged. The measurement device can operate underwater without extra human intervention and can automatically measure the radon content in water rapidly and accurately.

Description

IN-SITU MEASUREMENT DEVICE FOR MARINE RADON AND MEASUREMENT METHOD THEREOF
TECHNICAL FIELD
100011 The present disclosure relates to the technical field of seawater measurement equipment, particularly to an in-situ measurement device for marine radon and a measurement method thereof
BACKGROUND ART
100021 Marine radon isotope tracing technique is an ideal approach to study various marine processes from a chemical perspective. Natural radon isotopes are classical tracers for studying ocean dynamics processes. Due to the extremely low concentration (0.05 dpm/L-3 dpm/L) of radon in the seawater, the measurement of radon requires large-volume sampling water enrichment. However, the large-volume water collection and the backwardness of analytical measuring techniques of the seawater has been restricting the progress of related study. At present, the measurement of radon isotopes in the seawater is mainly confined to laboratory analysis, and the vessel-mounted measurement technique is only in the initial stage, so the underwater in-situ measurement is not yet well established. Therefore, how to provide an in-situ measurement system for radon concentration of seawater is a technical problem unsolved by the current technology.
100031 The patent with the application number of "202111524513.9" and entitled "In-situ measurement system for radon concentration of seawater" discloses a technical solution capable of carrying out in-situ measurement on the radon concentration of seawater. The system includes a degassing device and a measurement device; the degassing device includes a gas extraction module for radon degassing from the seawater, and a gas outlet tube and a gas inlet tube which are connected to the degassing module; the measurement device includes a gas monitoring module and a radon measuring probe which are arranged in a well-sealed cabin. The sealed cabin is provided with a gas inlet and a gas outlet, the gas inlet communicates with a gas outlet tube of the degassing device, the gas outlet communicates with the gas inlet tube of the degassing device, and the gas inlet and the gas outlet are each connected with a control valve; a gas pump is arranged in the gas monitoring module, and a gas inlet port of the gas pump is connected to the gas inlet through a gas path; a radon probe is arranged in the radon probe sealed cabin, a gas inlet port of the radon measuring probe is connected to a gas outlet port of the gas pump through a gas path, and a gas outlet port of the radon probe is connected to the gas outlet through a gas path. Accordingly, the underwater in-situ measurement of the seawater radon isotopes can be achieved.
100041 However, it is needed to control a relative humidity of the gas to be below 10% in the process of using the traditional radon probe, and the operating conditions of using the traditional radon probe are relatively harsh. Introducing the gas separated from the degassing device into the radon probe directly not only affects the measurement accuracy of the radon probe, but also causes internal components of the radon probe to be in a high humidity environment for a long time, thereby influencing the service life of the radon probe.
SUMMARY
100051 An objective of some embodiments is to provide an in-situ measurement device for marine radon and a measurement method thereof to solve the problems in the prior art, which not only can reduce the influence of the moisture content in gas on the measuring section so as to improve the measurement accuracy, but also can prolong the service life of the measuring section by reducing the humidity of an environment where internal elements of the measuring section are located.
100061 To achieve the objective above, some embodiments provide the following technical solutions: an in-situ measurement device for marine radon detection provided by the present disclosure includes a degassing assembly and a measurement assembly which are located in an underwater docking cabin. The degassing assembly is configured for separating gas from seawater, and the measurement assembly includes a drying section and a measuring section. The drying section is configured for removing moisture in the gas, and the measuring section is configured for in-situ radon measurement. The exhaust port of the degassing assembly, the drying section and the measuring section are in sequential connection in a flowing direction of the gas.
100071 Preferably, the drying section includes a Nation drying tube and a drying column filled with a desiccant, the Nafion drying tube and the drying column are in sequential communication in the flowing direction of the gas; the Nafion drying tube includes an inner tube and an outer tube which are provided in a nested mode, ends of the outer tube communicate with the exhaust port of the degassing assembly and the drying column, and the inner tube communicate with the measuring section and a gas inlet of the degassing assembly, respectively.
100081 Preferably, a gas filter is further arranged between the drying column and the measuring section, and is configured for filtering particulate impurities in the gas and decay progenies of the radon.
100091 Preferably, the measuring section includes a PIC radon detector for measuring radon concentration and a Temperature Humidity Pressure sensor for measuring a temperature, humidity and pressure of the gas.
100101 Preferably, the measurement assembly further includes a diaphragm gas pump configured for providing gas flow, and the diaphragm gas pump is located at an inlet of the measuring section.
10011] Preferably, the degassing assembly includes a liquid filter, a diaphragm water pump, a gas extraction tube and a liquid check valve which are sequentially connected in a flowing direction of a liquid; a gas inlet and an exhaust port of the gas extraction tube are the gas inlet and the exhaust port of the degassing assembly, respectively.
100121 Preferably, a gas check valve is further arranged between the inner tube and the gas inlet of the degassing assembly.
100131 Preferably, the docking cabin includes a measurement cabin and a degassing cabin, the measurement assembly and the degassing assembly are respectively arranged in the measurement cabin and the degassing cabin, and the measurement assembly further includes a water leakage detector configured for detecting a water leakage of the measurement cabin.
100141 Preferably, the in-situ measurement device further includes a data collecting and controlling system arranged above water, and the data collecting and controlling system is electrically connected to the degassing assembly and the measurement assembly.
100151 A measurement method of an in-situ measurement device for marine radon, including the following steps: [00161 1) Seawater was pumped into a gas extraction tube by a diaphragm water pump included in the in-situ measurement device. In this way, dissolved gases is separated by using the gas extraction tube; [00171 2) Extracted gas is introduced into a drying column by the air pump to remove excess moisture through the outer tube of a Nafion drying tube included in the in-situ measurement device; and then introduced the dried gas into a PIC radon detector included in the in-situ measurement device to measure radon activity; and 100181 3) Measured gas is introduced into the gas extraction tube after sequentially passing through an inner tube of the Nafion drying tube and a gas check valve included in the in-situ measurement device, and finally the wasted seawater is discharged through a liquid check valve included in the in-situ measurement device.
100191 Compared with the prior art, some embodiments have the following technical 20 effects.
100201 1. The in-situ measurement device can operate underwater without extra human intervention, and can automatically measure the radon activity in the water body rapidly and accurately. The in-situ measurement device is further provided with a drying section, which not only can reduce the influence of the moisture content in the radon gas on the measuring section so as to improve the measurement precision, but also can prolong the service life of the measuring section by reducing the humidity of an environment where internal elements of the measuring section are located.
100211 2. The extracted gas is dried in a way of combining the Nation (registered trademark) drying tube with the drying column. Because of a larger humidity difference between the inner tube and the outer tube of Nation drying tube, water molecules in upcoming high humidity gas to be measured will enter the inner tube from the outer tube in a passive diffusion manner, thereby making the humidity of the gas entering the drying column decrease in advance, which is conducive to prolonging the service life of the desiccant inside the drying column, and can also improve the drying effect.
BRIEF DESCRIPTION OF THE DRAWINGS
100221 In order to more clearly illustrate technical solutions in the embodiments of the present application or in the prior art, a brief introduction to the accompanying drawings required for the embodiment will be provided below. Obviously, the accompanying drawings in the following description are only some of the embodiments of the present disclosure. Those of ordinary skill in the art would also be able to derive other drawings from these drawings without making creative efforts.
100231 FIG. 1 is a schematic diagram of an overall structure of an in-situ measurement device for marine radon according to an embodiment of the present disclosure; and 100241 FIG. 2 is a flow chart of a measurement method of an in-situ measurement device for marine radon.
100251 In the figures: 1 data collecting and controlling system; 11 shore-based electronic control module; 2 degassing assembly; 21 liquid filter; 22 diaphragm water pump; 23 gas extraction tube; 24 liquid check valve; 3 measurement assembly; 31 Nation drying tube; 32 drying column; 33 gas filter; 34 PIC radon detector; 35 Temperature Humidity Pressure sensor; 36 water leakage detector; 37 gas check valve; 38 diaphragm gas pump; 4 underwater electronic control module.
DETAILED DESCRIPTION OF THE EMBODIMENTS
100261 The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
100271 An objective of some embodiments is to provide an in-situ measurement device for marine radon and a measurement method thereof to solve the problems in the prior art, which not only can reduce the influence of the moisture content in gas on the measuring section so as to improve the measurement accuracy, but also can prolong the service life of the measuring section by reducing the humidity of an environment where internal elements of the measuring section are located.
10028] In order to make the objectives, features, and advantages mentioned above of the present disclosure more apparent and easily understood, the present disclosure will be further described in detail below with reference to the drawings and typical implementations.
100291 The embodiment provides an in-situ measurement device for marine radon. The in-situ measurement device includes a degassing assembly 2 and a measurement assembly 3 which are located in an underwater docking cabin. The degassing assembly 2 is used for extracting gas from the seawater, and the measurement assembly 3 includes a drying section and a measuring section. The drying section is used for removing moisture from the gas, and the measuring section is used for radon measurement. An exhaust port of the degassing assembly 2, the drying section and the measuring section are in sequential connection in a flowing direction of the gas.
100301 During using the in-situ measurement device, the docking cabin is placed below the water at interested depth, the seawater is pumped into the degassing assembly 2, the extracted gas from the seawater is directed into the drying section of the measurement assembly for the removal of the moisture, and then the dried gas is introduced into the measuring section for the measurement of the radon, and finally the radon concentration in the dried gas can be converted into the content of radon in the water body through a gas-liquid partition coefficient. The in-situ measurement device in this embodiment can operate underwater without extra human intervention, and can automatically measure the radon content in the water body rapidly and accurately. The drying section is further set which not only can reduce the influence of the moisture content in the radon gas on the measuring section so as to improve the measurement precision, but also can prolong the service life of the measuring section by reducing the humidity of an environment where internal elements of the measuring section are located.
100311 Particularly, the degassing assembly 2 in this embodiment includes a liquid filter 21, a diaphragm water pump 22, a gas extraction tube 23, and a liquid check valve 24 which are sequentially connected in a flowing direction of the liquid. The measurement assembly 3 includes a Nafion (registered trademark) drying tube 31, a drying column 32 filled with a desiccant, a gas filter 33, a diaphragm gas pump 28, and a radon measurement cabin which are sequentially provided in a flowing direction of the gas. The Nafion drying tube 31 includes an inner tube and an outer tube which are in a nested mode. Ends of the outer tube are connected with an exhaust port of the gas extraction tube 23 and the drying column 32, respectively. The inner tube is connected with the measuring section in the radon measurement cabin and a gas inlet of the gas extraction tube 23, respectively. Specifically, the measuring section includes a pulsed ionization chamber (PIC) radon detector and a Temperature Humidity Pressure sensor 35.
100321 In the specific working process, the diaphragm water pump 22 pumps water to firstly flow through the liquid filter 21 (a stainless-steel filter screen with the precision of 40 i_um can be employed) to filter out biological debris, silt, sediments and other large-particle substances mixed in the seawater, thus guaranteeing that the degassing assembly 2 has a good working environment to avoid influence to the service life and the degassing efficiency of the degassing assembly. The filtered water flows through the gas extraction tube 23 at a constant flow rate of 2 L/min, and thus dissolved gas in the seawater is extracted after passing through the gas extraction tube 23. The extracted gas firstly passes through the outer tube of the Nafion drying tube 31 at a flow rate of 1 L/min under the action of the diaphragm gas pump 38 and then passes through the drying column 32 filled with an 8 mesh CaSO4-CoCl2Drierite, so as to further remove water moisture. The dried gas passes through a nylon membrane gas filter 33 with a pore diameter of 0.45 pm, so as to remove particulate impurities and decay progenies (Pot and Pb-ions) of radon, and then enters the radon measurement cabin in which the radon concentration is measured by using the PIC radon detector. Meanwhile, the temperature, humidity and pressure of the radon gas are measured by using the Temperature Humidity Pressure sensor 35. Afterwards, the gas returns to the gas extraction tube 23 after passing through the inner tube of the Nafion drying tube 31 and the gas check valve 37 so as to be redissolved into the seawater, and then the wasted seawater with the redissolved gas is discharged through the liquid check valve 24.
100331 Due to a larger humidity difference between the inner tube and the outer tube of Nafion drying tube 31, water molecules in the upcoming high humidity gas will enter the inner tube from the outer tube in a passive diffusion manner, thereby making the humidity of the gas entering the drying column 32 decrease in advance, which is conducive to prolonging the service life of the desiccant inside the drying column 32, and can also improve the drying effect of the gas.
100341 Although the drying section has been provided in this embodiment, the PIC radon detector is still used, the detection efficiency of a radon probe in the PIC radon detector is about twice that of a conventional RAD7 radon detector, and the detection sensitivity of the PIC radon detector is almost not affected by the humidity of the gas, therefore the PIC radon detector has higher measurement accuracy.
100351 The gas extraction tube 23 may select an existing degassing element. As such, the specific structure and the principle thereof will not be described in detail.
[00361 The docking cabin includes a measurement cabin and a degassing cabin. The measurement assembly 3 and the degassing assembly are respectively arranged in the measurement cabin and the degassing cabin. The measurement assembly 3 further includes a water leakage detector 36 for detecting a water leakage emergency of the measurement cabin. Specifically, the water leakage detector 36 includes a leakage detection sensor, a single chip microcomputer, and an electromagnetic valve, and is installed at a gas inlet of the outer tube of the Nafion drying tube 31 for, Turning the electromagnetic valve on or off is controlled based on a detection result of the leakage detection sensor to prevent the water from entering the measurement cabin to damage internal components.
[00371 In order to guarantee the normal operation of various elements in the measurement device, an underwater electronic control module 4 is further arranged in the docking cabin. A data collecting and controlling system 1 is arranged above the water which includes a shore-based electronic control module. The shore-based electronic control module includes a first power supply module, a first communication module, and a switch. The shore-based electronic control module has four interfaces, including a power supply interface, power supply communication interface, a USB interface and a network port. A shore power is connected to the power supply interface; the power supply communication interface is connected to the underwater docking cabin through a vulcanized 8-core watertight cable to achieve underwater 220V AC power supply and data transmission; and the USB interface and the network port can be directly connected to a computer for the setting of underwater devices and the real-time reading of data through a master computer software. The underwater electronic control module 4 mainly includes a second power supply module and a second communication module. The second power supply module is mainly used for converting 220 V alternating current from the shore into 12 V direct current and supplying the direct current to components such as the diaphragm water pump 22, the diaphragm gas pump 38, the water leakage detector 36, the Temperature Humidity Pressure sensor 35 and the radon detector in the underwater docking cabin. The whole system has the first communication module and the second communication module for achieving communication between each of the underwater Temperature Humidity Pressure sensor 35 and the underwater PIC radon detector 34, and the shore-based master computer.
And, these communication modules have the advantages of high and stable transmission rate over long distances.
100381 Referring to FIG. 2, the embodiment provides a measurement method of an in-situ measurement device for marine radon, which includes the following step 1) to step 3).
100391 In step 1), seawater is pumped into a gas extraction tube 23 by a diaphragm water pump 22, and gas is extracted by using the gas extraction tube 23 to form extracted gas; 100401 In step 2), the extracted gas is directed into a drying column 32 to form dried gas, through an outer tube of a Nation drying tube 31, and is introduced into a PIC radon detector 34 to be measured; and 100411 In step 3), the measured gas is introduced back into the gas extraction tube 23 after sequentially being passed through the inner tube of the Nation drying tube 31 and the gas check valve 37 so as to be redissolved in the seawater, and finally the wasted seawater with the redissolved gas is discharged through the liquid check valve 24.
100421 Adaptive changes made according to actual requirements are all within the scope of protection of the present disclosure.
100431 It should be noted that it is apparent to those skilled in the art that the present disclosure is not limited to the details of the above exemplary embodiments, and the present disclosure may be implemented with other forms without departing from the spirit or basic features of the present disclosure. Thus, in any way, the embodiments should be regarded as exemplary, not limitative. The scope of the present disclosure is limited by the appended claims, instead of the above depiction. Thus, all variations intended to fall into the meaning and scope of equivalent elements of the claims should be covered within the present disclosure. No reference signs in the claims should be regarded as limiting the involved claims.

Claims (10)

  1. WHAT IS CLAIMED IS: 1. An in-situ measurement device for marine radon, comprising an underwater docking cabin and a degassing assembly and a measurement assembly which are located in an underwater docking cabin, wherein the degassing assembly is configured for separating gas from seawater, and the measurement assembly comprises a drying section and a measuring section; the drying section is configured for removing moisture in the gas, and the measuring section is configured for carrying out an in-situ measurement on the radon; and an exhaust port of the degassing assembly, the drying section and the measuring section are in sequential connection in a flowing direction of the gas.
  2. 2. The in-situ measurement device for marine radon according to claim I, wherein the drying section comprises a Nafion drying tube and a drying column filled with a desiccant, the Nafion drying tube and the drying column are in sequential communication in the flowing direction of the gas; the Nation drying tube comprises an inner tube and an outer tube which are provided in a nested mode, ends of the outer tube communicate with the exhaust port of the degassing assembly and the drying column, and the inner tube communicate with the measuring section and a gas inlet of the degassing assembly, respectively.
  3. 3. The in-situ measurement device for marine radon according to claim 2, wherein a gas filter is further arranged between the drying column and the measuring section, and is configured for filtering particulate impurities in the gas and decay progenies of the radon.
  4. 4. The in-situ measurement device for marine radon according to claim 3, wherein the measuring section comprises a PIC radon detector for measuring radon concentration and a Temperature Humidity Pressure sensor for measuring a temperature, humidity and pressure of the gas.
  5. 5. The in-situ measurement device for marine radon according to claim 4, wherein the measurement assembly further comprises a diaphragm gas pump configured for providing a gas flow of the gas, and the diaphragm gas pump is located at an inlet of the measuring section.
  6. 6. The in-situ measurement device for marine radon according to any one of claims 1 to 5, wherein the degassing assembly comprises a liquid filter, a diaphragm water pump, a gas extraction tube and a liquid check valve which are sequentially connected in a flowing direction of a liquid; a gas inlet and an exhaust port of the gas extraction tube are the gas inlet and the exhaust port of the degassing assembly, respectively.
  7. 7. The in-situ measurement device for marine radon according to claim 6, wherein a gas check valve is further arranged between the inner tube and the gas inlet of the degassing assembly.
  8. 8. The in-situ measurement device for marine radon according to claim 1, wherein the docking cabin comprises a measurement cabin and a degassing cabin, the measurement assembly and the degassing assembly are respectively arranged in the measurement cabin and the degassing cabin, and the measurement assembly further comprises a water leakage detector configured for detecting a water leakage of the measurement cabin.
  9. 9. The in-situ measurement device for marine radon according to claim 1, wherein the in-situ measurement device further comprises a data collecting and controlling system arranged above water, and the data collecting and controlling system is electrically connected to the degassing assembly and the measurement assembly.
  10. 10. A measurement method of an in-situ measurement device for marine radon, comprising: 1) feeding seawater into a gas extraction tube comprised in the in-situ measurement device by a diaphragm water pump comprised in the in-situ measurement device, and separating gas by using the gas extraction tube to form extracted gas; 2) introducing the extracted gas into a drying column comprised in the in-situ measurement device to remove excess moisture to form dried gas, through an outer tube of a Nafion drying tube comprised in the in-situ measurement device; and then introducing the dried gas into a PIC radon detector comprised in the in-situ measurement device to measure radon activity to form measured gas; and 3) introducing the measured gas into the gas extraction tube after sequentially passing through an inner tube of the Nafion drying tube and a gas check valve comprised in the in-situ measurement device so as to be dissolved in seawater to form dissolved gas, and finally discharging the seawater with the dissolved gas through a liquid check valve comprised in the in-situ measurement device.
GB2212008.3A 2022-05-30 2022-08-17 In-situ measurement device for marine radon and measurement method thereof Pending GB2619362A (en)

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CN202210595724.XA CN115015503A (en) 2022-05-30 2022-05-30 Ocean radon in-situ measurement device and measurement method

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CN115453604B (en) * 2022-11-14 2023-03-24 中国海洋大学 Full-sea deep radon concentration in-situ measurement device and measurement method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105067789A (en) * 2015-10-01 2015-11-18 南华大学 Open-loop type in-situ measurement method and device for exhalation rate of radon in water body
CN214540063U (en) * 2021-02-10 2021-10-29 衡阳师范学院 Device for continuously measuring radon concentration in water at different depths
CN114002392A (en) * 2021-11-22 2022-02-01 东华理工大学 Novel continuous water radon degassing measurement device and method
CN217084911U (en) * 2021-12-14 2022-07-29 中国海洋大学 Underwater in-situ radon and carbon dioxide measuring instrument
CN114839318A (en) * 2022-03-01 2022-08-02 中国海洋大学 High-efficient degasification detecting system suitable for high pressure sea water underwater operation
CN115453604A (en) * 2022-11-14 2022-12-09 中国海洋大学 In-situ measurement device and measurement method for radon concentration in whole sea depth

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104089916A (en) * 2014-07-16 2014-10-08 长沙开元仪器股份有限公司 Sulfur measuring system
CN106178854B (en) * 2016-09-14 2019-07-26 上海神开石油科技有限公司 A kind of drying device and drying means of gas detection logging sample gas
CN111220776A (en) * 2020-01-21 2020-06-02 山东大学 System and method for carrying out advanced geological prediction on radioactive radon carried by TBM (tunnel boring machine)
CN215769042U (en) * 2021-04-27 2022-02-08 赛睿环仪(北京)科技有限公司 Radon measuring device
CN113577974A (en) * 2021-07-28 2021-11-02 刘菊红 Radon removing and purifying method and device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105067789A (en) * 2015-10-01 2015-11-18 南华大学 Open-loop type in-situ measurement method and device for exhalation rate of radon in water body
CN214540063U (en) * 2021-02-10 2021-10-29 衡阳师范学院 Device for continuously measuring radon concentration in water at different depths
CN114002392A (en) * 2021-11-22 2022-02-01 东华理工大学 Novel continuous water radon degassing measurement device and method
CN217084911U (en) * 2021-12-14 2022-07-29 中国海洋大学 Underwater in-situ radon and carbon dioxide measuring instrument
CN114839318A (en) * 2022-03-01 2022-08-02 中国海洋大学 High-efficient degasification detecting system suitable for high pressure sea water underwater operation
CN115453604A (en) * 2022-11-14 2022-12-09 中国海洋大学 In-situ measurement device and measurement method for radon concentration in whole sea depth

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