Device for measuring gaseous iodine adsorption

Abstract

A device for measuring gaseous iodine adsorption comprises a gaseous iodine adsorption bin, the gaseous iodine adsorption bin is a glass container, a spring is suspended in the gaseous iodine adsorption bin, the lower end of the spring is connected with a glass bottle, an adsorbent for adsorbing gaseous iodine is placed in the glass bottle, the lower end of the spring is further connected with a measuring claw, and the side face of the gaseous iodine adsorption bin is provided with a graduated scale for indicating the length change of the spring. The upper part of the gaseous iodine adsorption bin communicates with the outlet end of the gas-guide tube; the iodine sample placing bin is used for placing an iodine sample for testing, and the top of the iodine sample placing bin is communicated with the gas-guide tube through a first valve; the top of the heating bin communicates with the gas guide pipe through a second valve, and a heating device and a sensor assembly for monitoring the pressure and temperature in the device are arranged in the heating bin; the air suction pipeline is communicated with the air guide pipe through a third valve and is connected with an air suction device; and the controller is used for being connected with the heating device and the sensor assembly. The device is simple in structure and high in measurement precision, and suitable iodine adsorbents can be conveniently selected according to adsorption results.

Description

Technical Field

[0001] This invention belongs to the field of iodine adsorption technology, specifically relating to a device for measuring the adsorption of gaseous iodine. Background Technology

[0002] Nuclear energy is a sustainable, low-carbon energy source that plays an increasingly important role in supporting the progress of human society. However, safety issues related to the operation of nuclear reactors exist, particularly concerning volatile radioactive elements. 129 I and 131 Iodine, existing in molecular iodine (I₂) and organic iodides (such as CH₃I and CH₃CH₂I), pollutes the environment and harms human health; therefore, it must be safely and effectively treated before being emitted as waste gas. Currently, various iodine separation technologies have been reported, mainly including adsorption, chemical precipitation, and ion exchange methods. Among these, solid-state adsorption is highly promising due to its high adsorption efficiency, good recycling performance, and green, economical, and environmentally friendly nature. Therefore, how to accurately and rapidly measure the iodine adsorption capacity of adsorbent materials using solid-state adsorption is a research topic with great potential.

[0003] Radioactive iodine is harmful to the human body, and prolonged contact with radioactive iodine is not advisable. Existing iodine adsorption devices cannot perform large-scale measurements, have poor accuracy, short lifespan, high cost, and are small in size, allowing for limited iodine measurements. Furthermore, if a high-performance adsorption material is used, the measurement results will be inaccurate. Utility Model Content

[0004] The purpose of this invention is to provide a device for measuring the adsorption of gaseous iodine. It has a simple structure, high measurement accuracy, facilitates the selection of a suitable iodine adsorbent based on the adsorption results, and can achieve a certain degree of semi-automation, reducing experimental steps and operational difficulty.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a device for measuring the adsorption of gaseous iodine, comprising a gaseous iodine adsorption chamber, which is a glass container with a spring suspended inside. The lower end of the spring is connected to a glass bottle, in which an adsorbent for adsorbing gaseous iodine is placed. The lower end of the spring is also connected to a measuring claw, and the top of the measuring claw is provided with an indicator arrow. A scale for indicating the change in the length of the spring is provided on the side of the gaseous iodine adsorption chamber. An opening is provided at the top of the gaseous iodine adsorption chamber and is connected to the outlet end of a gas guide tube.

[0006] An iodine sample placement chamber is used to place iodine samples for testing. The top of the iodine sample placement chamber is connected to the gas delivery pipe through a first valve.

[0007] The heating chamber has its top connected to the air duct via a second valve. The heating chamber is equipped with a heating device and a sensor assembly for monitoring the internal pressure and temperature of the device. The heating device is used to heat the inside of the device.

[0008] The suction pipe is connected to the air guide pipe via a third valve and is connected to the suction device for suctioning air from the device.

[0009] A controller is used to connect to the heating device and sensor assembly.

[0010] Specifically, the shell of the gaseous iodine adsorption chamber is made of alumina nitride glass.

[0011] Specifically, a vertically installed rod is provided at the top of the gaseous iodine adsorption chamber. The top end of the spring is connected to the rod, and the bottom end of the spring is connected to the glass bottle via a vertically installed connecting rod. The measuring claw is connected to the connecting rod and is perpendicular to the connecting rod.

[0012] Specifically, the heating device is a heating rod, which is connected to the controller via a wire.

[0013] Specifically, the sensor assembly includes a resistance temperature sensor and a capacitive pressure sensor.

[0014] Specifically, the first valve, the second valve, and the third valve are all electrically controlled valves and are connected to the controller.

[0015] Specifically, the first valve, the second valve, and the third valve are all manual valves.

[0016] Specifically, the air duct is provided with a protective outer shell.

[0017] Specifically, a check valve is installed at the outlet end of the air duct.

[0018] Specifically, the inner walls of the iodine sample placement chamber, the gas delivery pipe, and the heating chamber are also provided with anti-corrosion coatings.

[0019] The beneficial effects of this invention are: It has good sealing performance, and the entire adsorption process is carried out within a sealed device, reducing the contact between operators and gaseous iodine during testing. This invention calculates the weight change of the adsorbent after adsorbing gaseous iodine by utilizing the extension of a spring; it has high sensitivity and the measurement results are accurate and reliable, providing experimental basis for the screening of adsorbents.

[0020] In use, under the same conditions, by changing different adsorbents and using this device to perform adsorption measurements, the adsorption capacity of different adsorbents can be compared horizontally, thereby selecting a suitable adsorbent. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the gaseous iodine adsorption chamber in this utility model;

[0024] Figure 3 This is a schematic diagram of the detection device in this utility model;

[0025] The diagram is labeled as follows: 1. Gaseous iodine adsorption chamber, 101. Hanging rod, 102. Spring, 103. Measuring claw, 104. Glass bottle, 105. Adsorbent, 106. Scale, 107. Connecting rod; 2. Gas delivery tube, 3. Iodine sample placement chamber, 301. First valve; 4. Heating chamber, 401. Second valve, 402. Heating rod, 403. Sensor assembly; 5. Inhalation pipe, 501. Third valve; 6. Controller, 601. Wire, 602. Temperature display, 603. Pressure display, 604. Power switch; 7. Protective casing. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.

[0027] like Figure 1-3 As shown, an apparatus for measuring gaseous iodine adsorption includes a gaseous iodine adsorption chamber 1, an iodine sample placement chamber 3, a heating chamber 4, an intake pipe 5, and a controller 6. The upper part of the gaseous iodine adsorption chamber 1 is connected to the end of a gas guide pipe 2, the other end of which is closed. The iodine sample placement chamber 3, the heating chamber 4, and the intake pipe 5 are all connected in parallel to the side of the gas guide pipe 2. The controller 6 is connected to a heating device in the heating chamber 4 to control the opening and closing of the heating device. The controller 6 is also connected to an intake device to control the intake device to draw air from the system through the intake pipe 5 to adjust the pressure within the system. Figure 1 Not shown, common suction devices such as vacuum pumps and suction pumps can be used. The gaseous iodine adsorption chamber 1, iodine sample placement chamber 3, heating chamber 4, and suction pipe 5 are all detachably connected to the gas guide pipe 2, for example, through a flange connection.

[0028] The iodine sample placement chamber 3 is also equipped with a first valve 301 for controlling the connection between the iodine sample placement chamber 3 and the gas delivery pipe 2. The heating chamber 4 is also equipped with a second valve 401 for controlling the connection between the heating chamber 4 and the gas delivery pipe 2. The suction pipe 5 is equipped with a third valve 501 for controlling the connection between the suction pipe 5 and the gas delivery pipe 2. The first valve 301, the second valve 401, and the third valve 501 are all manual valves. The experimenter selects whether to control the opening and closing of the suction device and the corresponding valves according to the internal pressure value of the device.

[0029] Preferably, the air guide tube 2 is covered with a protective outer shell to protect the air guide tube 2.

[0030] like Figure 2 As shown, the shell of the gaseous iodine adsorption chamber 1 is made of alumina nitride glass, with an opening on one side of its upper part connected to the gas guide pipe 2, thus achieving communication between the interior of the gaseous iodine adsorption chamber 1 and the gas guide pipe 2. Preferably, a check valve (not shown in the figure) is provided at the outlet end of the gas guide pipe 2. The check valve allows gaseous iodine to enter the gaseous iodine adsorption chamber 1 and prevents gaseous iodine from returning to the gas guide pipe 2, thereby ensuring one-way flow of gaseous iodine. A spring 102 is suspended inside the gaseous iodine adsorption chamber 1. The upper end of the spring 102 is connected to a vertically installed rod 101 at the top of the inner cavity. The lower end of the spring 102 is connected to a glass bottle 104 through a connecting rod 107. An adsorbent 105 for adsorbing gaseous iodine is placed inside the glass bottle 104. The connecting rod 107 is vertically installed, and a measuring claw 103 is fixedly connected to the connecting rod 107. The measuring claw 103 is perpendicular to the connecting rod 107, and an indicator arrow is provided at the top of the measuring claw 103. The side wall of the gaseous iodine adsorption chamber 1 is provided with a scale 106 for indicating the change in length of the spring 102. After the spring 102 changes in length, the measuring claw 103 moves with the spring 102. The indicator arrow of the measuring claw 103 points to different scale values ​​to show the deformation of the spring 102. Figure 2 In order to show the scale 106, the scale 106 is partially enlarged. In fact, the scale 106 is set on the side of the gaseous iodine adsorption chamber 1.

[0031] Furthermore, the shell of the gaseous iodine adsorption chamber 1 is a split design, which facilitates the placement and removal of the glass bottle 104 and the installation of structural components such as the spring 102 and the measuring claw 103. Alternatively, the shell of the gaseous iodine adsorption chamber 1 is provided with corresponding access ports for placing and removing the glass bottle 104 and structural components such as the spring 102 and the measuring claw 103. The access ports are sealed by a sealing cap to prevent gaseous iodine leakage.

[0032] like Figure 3 As shown, the heating device in the heating chamber 4 uses a heating rod 402, which is safer and more environmentally friendly than the heating method of fossil combustion. The heating rod 402 is connected to the external controller 6 via a wire 601.

[0033] Furthermore, the heating chamber 4 is also equipped with a sensor assembly 403 consisting of a temperature sensor and a pressure sensor, which is connected to the controller 6 via a wire 601. Specifically, the temperature sensor is a resistance temperature sensor and the pressure sensor is a capacitive pressure sensor, which can accurately measure the temperature and pressure within the system.

[0034] Preferably, the first valve 301, the second valve 401 and the third valve 501 are all electrically controlled valves and are connected to the controller 6. The controller 6 can control the opening or closing of the valves according to the pressure value in the system to achieve a certain degree of automation.

[0035] The controller 6 has a temperature display 602, a pressure display 603, a power switch 604, and buttons for controlling the heating rod and the suction device.

[0036] Preferably, the inner walls of the iodine sample placement chamber 3, the gas guide tube 2, and the heating chamber 4 are also provided with anti-corrosion coatings to avoid corrosion by gaseous iodine and reduce heat conduction efficiency, effectively preventing accidental leakage.

[0037] The process of performing gaseous iodine adsorption measurement using this device is as follows:

[0038] 1. Place the iodine sample in the iodine sample placement chamber 3, and place the adsorbent 105 in the glass bottle 104 of the gaseous iodine adsorption chamber 1;

[0039] 2. Open the first valve 301, the second valve 401 and the third valve 501, and use the controller 6 to activate the suction device to suction air into the system until the system reaches the appropriate cavity pressure; then, close the third valve 501 and turn on the heating rod 402 to heat the system. After reaching the set temperature (e.g., 78°C), close the second valve 401.

[0040] 3. After the iodine sample is heated and sublimated into gaseous iodine, it enters the gas guide tube 2 through the first valve 301 and then enters the gaseous iodine adsorption chamber 1 again, where it is gradually adsorbed by the adsorbent 105.

[0041] 4. As the amount of gaseous iodine adsorbed by the adsorbent 105 increases, the mass inside the glass bottle 104 at the lower end of the spring 102 gradually increases, causing the spring 102 to elongate. This elongation is indicated on the scale 106 on the side of the gaseous iodine adsorption chamber 1 by the indicator arrow of the measuring claw 103. The change in the scale of the measuring claw 103 is read from the scale 106, which is the deformation of the spring 102. The mass of gaseous iodine adsorbed is calculated according to Hooke's Law, and finally the mass fraction of iodine adsorbed by a certain mass of adsorbent is obtained.

[0042] Under the same conditions, by changing different adsorbents and using this device to perform adsorption measurements, the adsorption capacity of different adsorbents can be compared horizontally, thereby screening for suitable adsorbents.

[0043] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of this utility model with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the pending claims.

Claims

1. An apparatus for measuring the adsorption of gaseous iodine, characterized in that: It includes a gaseous iodine adsorption chamber, which is a glass container with a spring suspended inside. The lower end of the spring is connected to a glass bottle containing an adsorbent for adsorbing gaseous iodine. The lower end of the spring is also connected to a measuring claw with an indicator arrow at the top. The side of the gaseous iodine adsorption chamber is provided with a scale to indicate the change in the length of the spring. The upper part of the gaseous iodine adsorption chamber has an opening that is connected to the outlet end of the gas delivery tube. An iodine sample placement chamber is used to place iodine samples for testing. The top of the iodine sample placement chamber is connected to the gas delivery pipe through a first valve. The heating chamber has its top connected to the air duct via a second valve. The heating chamber is equipped with a heating device and a sensor assembly for monitoring the internal pressure and temperature of the device. The heating device is used to heat the inside of the device. The suction pipe is connected to the air guide pipe via a third valve and is connected to the suction device for suctioning air from the device. A controller is used to connect to the heating device and sensor assembly.

2. The device for measuring gaseous iodine adsorption according to claim 1, characterized in that: The shell of the gaseous iodine adsorption chamber is made of alumina glass.

3. The device for measuring gaseous iodine adsorption according to claim 1, characterized in that: A vertically installed rod is mounted on the top of the gaseous iodine adsorption chamber. The top end of the spring is connected to the rod, and the bottom end of the spring is connected to the glass bottle via a vertically installed connecting rod. The measuring claw is connected to the connecting rod and is perpendicular to the connecting rod.

4. The device for measuring gaseous iodine adsorption according to claim 1, characterized in that: The heating device is a heating rod, which is connected to the controller via a wire.

5. The apparatus for measuring gaseous iodine adsorption according to claim 1, characterized in that: The sensor assembly includes a resistance temperature sensor and a capacitive pressure sensor.

6. The apparatus for measuring gaseous iodine adsorption according to claim 1, characterized in that: The first valve, the second valve, and the third valve are all electrically controlled valves and are connected to the controller.

7. The apparatus for measuring gaseous iodine adsorption according to claim 1, characterized in that: The first valve, the second valve, and the third valve are all manual valves.

8. The apparatus for measuring gaseous iodine adsorption according to claim 1, characterized in that: The air duct is equipped with a protective outer shell.

9. The apparatus for measuring gaseous iodine adsorption according to claim 1, characterized in that: A check valve is installed at the outlet end of the air duct.

10. The apparatus for measuring gaseous iodine adsorption according to claim 1, characterized in that: The inner walls of the iodine sample placement chamber, the gas delivery pipe, and the heating chamber are also provided with anti-corrosion coatings.

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