CN209784030U - Hydrogen isotope concentration system suitable for environmental level - Google Patents
Hydrogen isotope concentration system suitable for environmental level Download PDFInfo
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- CN209784030U CN209784030U CN201920367240.3U CN201920367240U CN209784030U CN 209784030 U CN209784030 U CN 209784030U CN 201920367240 U CN201920367240 U CN 201920367240U CN 209784030 U CN209784030 U CN 209784030U
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Abstract
The utility model discloses a hydrogen isotope concentration system suitable for environmental level. The gas to be measured is divided into two paths when entering the system, one path enters the bottom of a ceramic tube arranged in the quartz glass tube through an Ar gas cylinder, and the other path directly enters the middle of the ceramic tube. After a certain time of reaction, two paths of gas from the ceramic tube and the quartz glass tube pass through the hygrothermograph and the flowmeter in sequence and are respectively connected with the dew point meter and the measuring module for relevant measurement. The system adopts a proton conductive ceramic tube to electrolyze HTO/HDO steam at high temperature to realize concentration of low-concentration hydrogen isotopes (HT/HD), and realizes measurement of the low-concentration hydrogen isotopes through a measurement module. The utility model discloses a hydrogen isotope concentration system suitable for environmental level can enough guarantee to carry out effective concentration to the low concentration hydrogen isotope in the workplace, can carry out the purification of sample again and collect in certain time, has reliable and stable, the advantage that concentration collection efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of radiation protection and environmental protection, concretely relates to hydrogen isotope concentration system suitable for environmental level.
Background
A certain amount of low-concentration tritium (far lower than Bq/m) exists in the ambient environment of tritium-involved places such as nuclear power stations, tritium target production, neutron generator production and the like3Magnitude). The tritium exists mainly in the form of HTO and HT, half of HT is converted into HTO in about 60 days at normal temperature, normal pressure and normal humidity, and inhalation hazard of HTO is 1.0X 10 of gaseous tritium4the hazard of HTO is therefore not negligible. However, the sensitivity of the current ionization chamber type tritium detector at home and abroad is generally 105Bq/m3On the left and right, much higher than the tritium concentration in most tritium process site environments. From the radiation protection perspective, the enrichment and measurement of low-concentration tritium in the environment of a tritium-involved place are particularly important.
At present, a tritium sampling method in a tritium-involved place environment is mainly a bubbling method, namely, radioactive gas bubbles when passing through a gas washing bottle with distilled water, and the HTO in an air sample and water undergo isotope exchange. However, the sensitivity of this method is generally (1-5) Bq/m3And the measurement of low-concentration tritium in the environment cannot be satisfied.
disclosure of Invention
The utility model aims to solve the technical problem that a hydrogen isotope concentration system suitable for environmental level is provided.
the utility model discloses a hydrogen isotope concentration system suitable for environmental level, its characteristics are: the hydrogen isotope concentration system is divided into two paths through a gas sampling pipeline, one path passes through an argon bottle and a hygrothermograph I and then passes through a flange plate to enter the upper part of the inner cavity of the ceramic tube, and after reaction, the hydrogen isotope concentration system flows out of the inner cavity of the ceramic tube and then sequentially flows out of a cooling coil I, a hygrothermograph II, a flowmeter I, a valve I, a measuring instrument and a pump I; the other path passes through a hygrothermograph IV and a steam bottle, then passes through a flange plate to enter the bottom of the inner cavity of the ceramic tube, flows out of the inner cavity of the quartz glass tube after reaction, and then sequentially flows out through a cooling coil II, a hygrothermograph III, a flowmeter II, a valve II, a dew point instrument and a pump II;
The ceramic tube is nested in the quartz glass tube, one end of the quartz glass tube and one end of the ceramic tube are closed ends, the other end of the quartz glass tube and the other end of the ceramic tube are open ends, and the open ends are sealed by flange plates to form an inner cavity of the ceramic tube and an inner cavity of the quartz glass tube between the ceramic tube and the quartz glass tube; 4 pipelines are distributed on the flange plate, one sample injection pipeline extends into the upper part of the inner cavity of the ceramic tube, the other sample injection pipeline extends into the bottom of the inner cavity of the ceramic tube, one gas outlet pipeline extends out of the upper part of the inner cavity of the ceramic tube, and the other gas outlet pipeline extends out of the inner cavity of the quartz glass tube;
the quartz glass tube is externally wrapped with an electric furnace.
The ceramic tube is a proton conductive ceramic tube.
The cooling coil I and the cooling coil II are one of air cooling coils or air cooling coils.
the electric furnace is a temperature programmed electric furnace, and the temperature rise range is room temperature-1100 ℃.
The pump I and the pump II are vacuum pumps.
The measuring instrument is one of an ionization chamber, a proportional counter tube or a chromatograph.
The connecting pipeline of the hydrogen isotope concentration system adopts a stainless steel pipeline with 1/8inch or 1/4 inch.
the valve I and the valve II are one of a manual valve, a semi-manual valve or an automatic valve with automatic temperature early warning.
The utility model discloses a hydrogen isotope concentration system suitable for environmental level adopts the electrochemistry principle, will contain during the tritium gas introduces ceramic tube, makes the gaseous emergence ionization of hydrogen isotope, tritium gas (HT/HD) and oxygen (O) after the ionization under certain temperature2) Respectively diffusing to two stages of the ceramic tube under the action of the electrodes, and then carrying out enrichment collection, thereby realizing separation and enrichment of HT/HD in tritium-containing gas.
The utility model discloses an adopt proton conductive ceramic pipe to carry out the gaseous ionization of hydrogen isotope in the hydrogen isotope concentration system suitable for environmental level, through the material ratio that changes proton conductive ceramic pipe, not only can carry out the separation of hydrogen isotope under the temperature of difference, also can be used to contain the gaseous purification work of tritium with HT/HD enrichment in the atmosphere of difference.
The utility model discloses a hydrogen isotope concentration system suitable for environmental level adopts the programming electric stove, can predetermine in advance and evenly effectively heat up the ceramic pipe, can take notes the inside intensification curve of ceramic pipe in real time moreover for the user can select arbitrary temperature zone section to carry out the experiment measurement according to the needs of oneself.
The utility model discloses a hydrogen isotope concentration system suitable for environmental level is provided with cooling coil behind the high temperature electric stove, can carry out cooling from the gas that comes out in the high temperature ceramic pipe effectively, the effectual measuring instrument who protects the rear end.
The utility model discloses a hydrogen isotope concentration system suitable for environmental level is provided with the valve at the measuring apparatu table front end, can carry out free control according to the reading of the warm and humid acidimeter of front end and flowmeter, has avoided the damage of gas temperature too high to rear end test, measuring instrument.
the utility model discloses a low concentration hydrogen isotope gas measurement problem has been solved to hydrogen isotope concentration system suitable for environmental level, especially solved and involved the problem in the aspect of low concentration hydrogen isotope gas measurement in tritium place environment, satisfy and involved the enrichment and the measurement requirement of low concentration hydrogen isotope in tritium place (nuclear power station, tritium target production, neutron generator production etc.) environment, be applicable to the enrichment and the nuclear power station of relevant workplace low concentration hydrogen isotope, the concentration and the collection of low concentration tritium in the relevant production places surrounding environment such as tritium target production and neutron generator.
Drawings
FIG. 1 is a schematic diagram of the hydrogen isotope concentration system of the present invention adapted for use at ambient levels;
In the figure: 1. the system comprises a gas sampling pipeline 2, an argon bottle 3, a hygrothermograph I4, a water vapor bottle 5, a flange 6, an electric furnace 7, a quartz glass tube 8, a ceramic tube 9, a cooling coil I10, a cooling coil II 11, a hygrothermograph II 12, a hygrothermograph III 13, a flowmeter I14, a flowmeter II 15, a valve I16, a valve II 17, a measuring instrument 18, a dew-point instrument 19, a pump I20, a pump II 21 and a hygrothermograph IV.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In fig. 1, the hydrogen isotope concentration system of the present invention is divided into two paths by a gas sampling pipeline 1, one path passes through an argon bottle 2 and a thermo-hygrometer i 3 and then passes through a flange 5 to enter the upper part of the inner cavity of a ceramic tube 8, and after reaction, flows out of the inner cavity of the ceramic tube 8, and then flows out of the cooling coil i 9, the thermo-hygrometer ii 11, a flowmeter i 13, a valve i 15, a measuring instrument 17 and a pump i 19 in sequence; the other path passes through a hygrothermograph IV 21 and a vapor bottle 4, then passes through a flange 5, enters the bottom of an inner cavity of a ceramic tube 8, flows out of an inner cavity of a quartz glass tube 7 after reaction, and then flows out of a cooling coil II 10, a hygrothermograph III 12, a flowmeter II 14, a valve II 16, a dew point instrument 18 and a pump II 20 in sequence;
The ceramic tube 8 is nested in the quartz glass tube 7, one end of the quartz glass tube 7 and one end of the ceramic tube 8 are closed ends, the other end of the quartz glass tube 7 and the other end of the ceramic tube 8 are open ends, and the open ends are sealed by the flange 5 to form an inner cavity of the ceramic tube 8 and an inner cavity of the quartz glass tube 7 between the ceramic tube 8 and the quartz glass tube 7; 4 pipelines are distributed on the flange 5, one sample introduction pipeline extends into the upper part of the inner cavity of the ceramic tube 8, one sample introduction pipeline extends into the bottom of the inner cavity of the ceramic tube 8, one gas outlet pipeline extends out of the upper part of the inner cavity of the ceramic tube 8, and one gas outlet pipeline extends out of the inner cavity of the quartz glass tube 7;
an electric furnace 6 is wrapped outside the quartz glass tube 7.
The ceramic tube 8 is a proton conductive ceramic tube.
The cooling coil I9 and the cooling coil II 10 are one of air cooling coils or air cooling coils.
the utility model discloses an electric stove 6 is the program heating electric stove, and the programming range is room temperature ~ 1100 ℃.
Pump i 19 and pump ii 20 are vacuum pumps.
The meter 17 is one of an ionization chamber, a proportional counter tube, or a chromatograph.
The connecting pipeline of the hydrogen isotope concentration system adopts a stainless steel pipeline with 1/8inch or 1/4 inch.
The valve I15 and the valve II 16 are one of a manual valve, a semi-manual valve or an automatic valve with automatic temperature early warning.
Example 1
The ceramic tube adopted in the embodiment is indium-doped CaZrO3the ceramic tube can react at the temperature of 600-900 ℃, and can effectively perform electrolytic concentration on hydrogen isotope gas.
The cooling coil I9 and the cooling coil II 10 in the embodiment are air cooling coils.
the electric furnace 6 in the embodiment is a self-made programmed heating electric furnace with the temperature rise range of ~ 1100 ℃.
The pump I19 and the pump II 20 in this embodiment are small vacuum pumps.
The measuring instrument 17 in this embodiment is a proportional counter tube, which has high sensitivity and can measure in a range in which the tritium concentration is extremely low (several Bq), thereby improving the detection sensitivity of the instrument.
All pipelines in the embodiment are formed by hard connection of 1/8inch stainless steel pipelines.
The valve I15 and the valve II 16 in the embodiment are manual one-way valves, the air flow speed is manually controlled, and the stability of the flow speed control of the system is improved; meanwhile, a manual valve is adopted, data can be acquired at any time and at any temperature, and convenience in operation is improved; the adoption of the single valve effectively avoids the situation that the gas at the rear end enters the measuring system at the front end in a reverse flow manner to influence the measuring accuracy, and further improves the reliability and stability of the hydrogen isotope concentration system.
In the embodiment, the HTO in the environment of a certain experimental site is concentrated for 120h at 600 ℃, 700 ℃ and 900 ℃ by adopting the materials and the equipment, and the concentration efficiency is respectively 110, 150 and 560.
The cooling coil in the embodiment can also be a gas cooling coil, the measuring instrument can also be an ionization chamber or a chromatograph, the hydrogen isotope concentration pipeline can also be a 1/4inch stainless steel pipeline, and the valve I15 and the valve II 16 can also be semi-manual valves or automatic valves with automatic temperature early warning. The same or similar concentration results can be obtained with any of the alternative devices or materials described above.
The present invention is not limited to the above embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.
Claims (2)
1. A hydrogen isotope enrichment system adapted for use at ambient levels, characterized by: the hydrogen isotope concentration system is divided into two paths through a gas sampling pipeline (1), one path passes through an argon bottle (2) and a hygrothermograph I (3), then passes through a flange plate (5) to enter the upper part of the inner cavity of a ceramic tube (8), and flows out of the inner cavity of the ceramic tube (8) after reaction, and then flows out of a cooling coil I (9), a hygrothermograph II (11), a flowmeter I (13), a valve I (15), a measuring instrument (17) and a pump I (19) in sequence; the other path passes through a hygrothermograph IV (21) and a steam bottle (4), then passes through a flange plate (5), enters the bottom of the inner cavity of a ceramic tube (8), flows out of the inner cavity of a quartz glass tube (7) after reaction, and then sequentially flows out through a cooling coil II (10), a hygrothermograph III (12), a flowmeter II (14), a valve II (16), a dew point instrument (18) and a pump II (20);
The ceramic tube (8) is nested in the quartz glass tube (7), one end of the quartz glass tube (7) and one end of the ceramic tube (8) are closed ends, the other end of the quartz glass tube is an open end, and the open ends are sealed by the flange (5) to form an inner cavity of the ceramic tube (8) and an inner cavity of the quartz glass tube (7) between the ceramic tube (8) and the quartz glass tube (7); 4 pipelines are distributed on the flange plate (5), one sample introduction pipeline extends into the upper part of the inner cavity of the ceramic tube (8), one sample introduction pipeline extends into the bottom of the inner cavity of the ceramic tube (8), one gas outlet pipeline extends out of the upper part of the inner cavity of the ceramic tube (8), and one gas outlet pipeline extends out of the inner cavity of the quartz glass tube (7);
The quartz glass tube (7) is wrapped by the electric furnace (6).
2. the hydrogen isotope concentration system suitable for the environmental level according to claim 1, wherein the electric furnace (6) is a temperature programmed electric furnace, and the temperature rise range is from room temperature to 1100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920367240.3U CN209784030U (en) | 2019-03-22 | 2019-03-22 | Hydrogen isotope concentration system suitable for environmental level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920367240.3U CN209784030U (en) | 2019-03-22 | 2019-03-22 | Hydrogen isotope concentration system suitable for environmental level |
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| Publication Number | Publication Date |
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| CN209784030U true CN209784030U (en) | 2019-12-13 |
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| CN201920367240.3U Active CN209784030U (en) | 2019-03-22 | 2019-03-22 | Hydrogen isotope concentration system suitable for environmental level |
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