CN205645291U - Tritium technology vent gas treatment system in - Google Patents
Tritium technology vent gas treatment system in Download PDFInfo
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- CN205645291U CN205645291U CN201620420052.9U CN201620420052U CN205645291U CN 205645291 U CN205645291 U CN 205645291U CN 201620420052 U CN201620420052 U CN 201620420052U CN 205645291 U CN205645291 U CN 205645291U
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- tritium
- ionization chamber
- catalytic reactor
- tail gas
- processing system
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Abstract
The utility model provides a tritium technology vent gas treatment system in, the one end that vacuum apparatus among the processing system is connected back and ionization chamber I through filter and gas collection jar is connected, and the other end of ionization chamber I is connected with pre -heater, catalytic converter I, catalytic converter II, cooling coil, condenser, molecular sieve collector, ionization chamber II in proper order, and the gas that misses emission standard after ionization chamber II is measured gets into the repeated above -mentioned flow of gas collection jar again, reaches emission standard's gas then get into the tail gas discharge pipe way and discharge. The utility model discloses a system can guarantee the complete catalytic oxidation of gaseous state tritium in the tritium technology tail gas, avoids adding hydrogen, has increased the security of processing procedure, has prolonged the life cycle that the in -process molecular sieve was collected in the condensation again, has reduced the frequency of reloading, has reduced the absorption dosage of staff to the tritium.
Description
Technical field
This utility model belongs to radiation protection and environmental protection technical field, is specifically related to a kind of tritium process tail gas
Processing system.It is applicable to the Workplaces such as nuclear power station, tritium target production and neutron generator at normal and accident conditions
The process of lower tritium process tail gas.
Background technology
Abroad relate to the plant facility of tritium operation, be equipped with respective tritium exhaust treatment system.Under air atmosphere
Tritium exhaust treatment system in, mainly use catalytic oxidation, first tritium gas be oxidized to HTO, then absorb with molecular sieve raw
The HTO become.TSA(Tritium systems Test such as Los Alamos National Laboratory
Assembly) the upper ETC(Emergency Tritium Cleanup being equipped with), the tritium decontamination system that is equipped with on european union heap,
The tritium cleaning system etc. being equipped with in Japan Atomic power institute tritium operational facilities all uses catalytic oxidation.It is 0 at operating pressure
～1.5MPa, operating temperature is 300～500 DEG C, and gas processing capability is 0～10m3Under/h, use circularly purifying mode,
The decontamination factor of tritium is more than 103Magnitude.The stream of U.S.'s Lawrence Livermore laboratory 400KeV accelerator tritium cleaning
Cheng Wei: expellant gas is mixed into cleaning system (in blender with one air stream (1L/min) being dried from accelerator
Tritium level is: 1.48 × 1010Bq /target.Day, i.e. 0.4Ci/target.Day).Mixed airflow is higher by temperature
Catalytic bed time, tritium (organic tritium and inorganic tritium) is oxidized to HTO by catalysis；Generate HTO steam by air setting tower cooler,
Then absorbed by molecular sieve.Experiment shows, if molecular sieve only has a few liter, continues through the flow aqueous sky less than 10L/min
Gas, its use time is 1～2 week, if molecular sieve is sufficiently large, then the system that ensure that can have the longer operation time, can make
Process conversion system quantity the fewest, and the radiological hazard with HTO can be reduced.The critical material catalysis that tritium cleaning processes
The developing direction of agent is the hydrophobic catalyst using and being difficult to poisoning, is catalyzed tritium oxide at normal temperatures；Tritium for inert atmosphere gives up
Gas, uses hydrogen adsorbing alloy, such as U bed, LaNi in the world5Deng.
Domestic, to tritium operationlocation carrying out tritium on-line monitoring and containing the research of tritium tail gas clean-up technology and relevant device
Exploitation is concentrated mainly on China Engineering Physics Research Institute, and Chinese Radiation Protection Research Inst has also carried out the research of part correlation technique
Exploitation.China's gongwu is studied seven targeted production technologies and is used alloy absorption method to eliminate tritium waste gas.China's gongwu grinds
Study carefully institute's nuclear physics and fill the work such as tritium, rotary target accelerator operation generation with the production of chemical research place DT target, ICF pellet high pressure
Radiation protection demand pull under, the monitoring containing tritium waste gas and purified treatment have been carried out long-term in-depth study, and have developed and grind
Having made containing tritium exhaust gas purifying treatment system, all applied in working site well, the system of up-to-date development is when the tritium-containing amount in tail gas
106～1010Bq/m3In the range of time, tritium concentration can be reduced more than an order of magnitude at about 30 minutes.
Summary of the invention
This utility model catalysed oxidation processes based on tritium process tail gas, comprehensive Optimizing Flow, invent for tritium technique
The a whole set of tritium cleaning processing system of tail gas.
Tritium process tail gas processing system of the present utility model is utilized in line and measures in real time, and measurement ionization chamber is placed in and processes back
Lu Zhong, both can real-time monitored to tritium concentration situation of change, it is to avoid the delay of sampling and measuring, in turn, ensure that the sealing of processing procedure
Property, it is to avoid sampling and measuring method center tap, pipeline, the leakage of sampling pump；Tritium process tail gas processing system of the present utility model is adopted
It is catalyzed the gas tritium in three link catalysis tritium oxide process tail gas by high temperature preheating, high-temperature catalytic and middle temperature, tritium can be improved and urge
Change the efficiency of reaction, it is to avoid add hydrogen, increase the safety of processing procedure, it is possible under the high temperature conditions by can in process gas
The trace gaseous organic substance Han tritium that can produce processes；The tritium process tail gas processing system of the present utility model collection to HTO
It is divided into three grades of cooling modes, most HTO that catalysis oxidation generates can be collected, due to the outside soak work of mol sieve reactors
Make temperature typically below freezing, can further improve the absorbability of molecular sieve, and extend the use of HTO collection molecular sieve
In the cycle, reduce and reload the frequency and staff takes in dosage.The pipeline of whole system and reactor all select 316L stainless steel
Matter, inwall carries out EP polishing, and Ra is less than 0.1, is effectively reduced tritium absorption on metal inner surface, reduces in maintenance process
Staff dose.Carry out processing air-flow by the pneumatic operated valve on loop to guide and can carry out containing tritium work in different modes simultaneously
Process gases processes.
It is as follows that this utility model solves the technical scheme that its technical problem used:
Tritium process tail gas processing system of the present utility model, it is characterised in that: described tritium process tail gas processing system includes
The vacuum equipment being connected with technique tail gas Han tritium and filter, also include collection and confinement of gases tank, ionization chamber I and ionization chamber II, preheating
Device, Pd catalytic reactor and Pt catalytic reactor, cooling coil, cooler and molecular sieve catcher.Its annexation is, very
Empty device is connected with one end of filter by pneumatic operated valve I, and the other end of filter is by collection and confinement of gases tank, pneumatic operated valve II, electricity
From room I, preheater be connected with one end of catalytic reactor I, one end of the other end of catalytic reactor I and catalytic reactor II is even
Connect, the other end of catalytic reactor II by cooling coil, condenser, molecular sieve catcher be connected with one end of ionization chamber II into
Row is measured, and after reaching discharge standard, the gas through ionization chamber II measurement enters exhaust emission pipeline by pneumatic operated valve IV to be carried out
Discharge, if being not up to discharge standard through what ionization chamber II was measured containing tritium gas, then the gas measured through ionization chamber II connects
Pneumatic operated valve III enters collection and confinement of gases tank and repeats above-mentioned circulation.
Described vacuum equipment includes KNF series membrane pump, pump shock mitigation system and radiator fan.
Described filter is membrane filter.
Described ionization chamber I and ionization chamber II are flow gas and survey tritium ionization chamber.
Described catalytic reactor I is 119-Pd-Al2O3Catalytic reactor, catalytic reactor II is 119-Pd-Al2O3Catalysis
Reactor and filling Pt inorganic hydrophobic catalyst catalytic reactor in any one.
Described cooling coil is snakelike cooling coil.
Described pipeline all uses the EP grade stainless steel pipeline Hard link of 1/4inch to form.
A kind of tritium process tail gas processing system of the present utility model, uses the method for On-line sampling system to carry out tritium technique tail
Gas disposal, can not only real-time monitored to tritium concentration situation of change, it is to avoid in sampling and measuring method center tap, pipeline, sampling pump
The leakage of tritium, and use the mode of high temperature preheating, high-temperature catalytic and the catalysis tertiary treatment of middle temperature to substantially increase catalytic reaction
Efficiency, the work alleviating tritium vent gas treatment personnel slightly and improves work efficiency.
A kind of tritium process tail gas processing system of the present utility model, uses three grades of cooling modes to carry out in tritium process tail gas
The collection of HTO, not only increases the absorbability of molecular sieve, extends the use cycle of molecular sieve, and decreases the frequency that reloads
Secondary, reduce the absorption dosage of staff.
A kind of tritium process tail gas processing system of the present utility model, used before technique is containing tritium gas sample entrance system
Filter carries out moisture and contaminant filter, eliminates introducing the impact surveying tritium ionization chamber sensitivity of moisture, greatly reduces impurity
Introduce on systematic sampling accuracy and the impact of long-time stability.It is applicable to nuclear power station, tritium target production and neutron generator etc.
Workplace is the process of tritium process tail gas under normal and accident conditions.
Accompanying drawing explanation
Fig. 1 is the structural representation of tritium process tail gas processing system of the present utility model；
In figure: 1. technique vacuum equipment 3. pneumatic operated valve I 4. filter 5. collection and confinement of gases tank in tritium tail gas 2.
6. pneumatic operated valve II 7. ionization chamber I 8. preheater 9. catalytic reactor I 10. catalytic reactor II 11. cooling coil
12. condenser 13. molecular sieve catcher 14. ionization chamber II 15. pneumatic operated valve III 16. pneumatic operated valve IV 17. tail gas rows
Put pipeline.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is described in further detail by specific embodiment.
Embodiment 1
Fig. 1 is the structural representation of tritium process tail gas processing system of the present utility model.In FIG, a kind of tritium technique tail
Gas processing system includes and the vacuum equipment 2 being connected containing tritium tail gas 1 with technique and filter 4, also includes collection and confinement of gases tank 5, electricity
From room I 7 and ionization chamber II 14, preheater 8, Pd catalytic reactor 9 and Pt catalytic reactor 10, cooling coil 11, cooler 12
And molecular sieve catcher 13.Its annexation is, vacuum equipment 2 is connected with one end of filter 4 by pneumatic operated valve I 3, filters
The other end of device 4 is connected with one end of catalytic reactor I 9 by collection and confinement of gases tank 5, pneumatic operated valve II 6, ionization chamber I 7, preheater 8
Connecing, the other end of catalytic reactor I 9 is connected with one end of catalytic reactor II 10, and the other end of catalytic reactor II 10 passes through
Cooling coil 11, condenser 12, molecular sieve catcher 13 are connected with one end of ionization chamber II 14 and measure, and reach discharge standard
After, the gas measured through ionization chamber II 14 is discharged by pneumatic operated valve IV 16 entrance exhaust emission pipeline 17, if through electricity
That measures from room II 14 is not up to discharge standard containing tritium gas, then the gas measured through ionization chamber II 14 connects pneumatic operated valve III 15
Enter collection and confinement of gases tank 5 and repeat above-mentioned circulation.
Described vacuum equipment 2 includes KNF series membrane pump, pump shock mitigation system and radiator fan.
Described filter 4 is membrane filter.
Described ionization chamber I and ionization chamber II are flow gas and survey tritium ionization chamber.
Described catalytic reactor I 9 is 119-Pd-Al2O3Catalytic reactor, catalytic reactor II 10 is 119-Pd-
Al2O3Catalytic reactor and filling Pt inorganic hydrophobic catalyst catalytic reactor in any one.
Described cooling coil 11 is snakelike cooling coil.
Described pipeline all uses the EP grade stainless steel pipeline Hard link of 1/4inch to form.
This utility model use the mode of high temperature preheating, high-temperature catalytic and the catalysis of middle temperature to the gas in tritium process tail gas
State tritium carries out catalysis oxidation, first passes around the high temperature preheating of preheater 8, improves the temperature of gaseous state tritium, reacts through high-temperature catalytic
Most of gaseous state tritium in tritium process tail gas is catalyzed oxidation and is converted into HTO by device I 9, afterwards will by middle temperature catalytic reactor II 10
The gaseous state tritium converted the most completely after catalytic reactor I 9 is catalyzed further and is oxidized to HTO, substantially increases tritium process tail gas
The catalysis oxidation efficiency of middle gaseous state tritium.
This utility model uses cooling coil 11 tentatively to condense, and condenser 12 condenses and molecular sieve catcher 13 further
Three grades of cooling modes, to catalysis oxidation after HTO progressively condense collection, be effectively increased the absorbability of molecular sieve,
Extend the use cycle of molecular sieve, decrease the frequency of reloading, greatly reduce the absorption dosage of tritium technique field personnel.
This utility model is not limited to this embodiment, all can implement and have described good effect described in this utility model content
Really.
Claims (6)
1. a tritium process tail gas processing system, it is characterised in that: described tritium process tail gas processing system includes with technique containing tritium
Tail gas (1) be connected vacuum equipment (2) and filter (4), also include collection and confinement of gases tank (5), ionization chamber I (7) and ionization chamber II
(14), preheater (8), Pd catalytic reactor (9) and Pt catalytic reactor (10), cooling coil (11), cooler (12) and
Molecular sieve catcher (13)；
Its annexation is, vacuum equipment (2) is connected with one end of filter (4) by pneumatic operated valve I (3), filter (4) another
One end is by one end of collection and confinement of gases tank (5), pneumatic operated valve II (6), ionization chamber I (7), preheater (8) and catalytic reactor I (9)
Connecting, the other end of catalytic reactor I (9) is connected with one end of catalytic reactor II (10), catalytic reactor II (10) another
One end is connected with one end of ionization chamber II (14) is carried out by cooling coil (11), condenser (12), molecular sieve catcher (13)
Measuring, after reaching discharge standard, the gas measured through ionization chamber II (14) enters tail gas discharging pipe by pneumatic operated valve IV (16)
Road (17) discharges, if being not up to discharge standard through what ionization chamber II (14) was measured containing tritium gas, then through ionization chamber II
(14) gas measured connects pneumatic operated valve III (15) entrance collection and confinement of gases tank (5) and repeats above-mentioned circulation.
Tritium process tail gas processing system the most according to claim 1, it is characterised in that: described vacuum equipment (2) includes KNF
Series membrane pump, pump damping device and radiator fan.
Tritium process tail gas processing system the most according to claim 1, it is characterised in that: described filter (4) is filter membrane mistake
Filter.
4. according to the tritium process tail gas processing system described in claim 1, it is characterised in that: described ionization chamber I and ionization chamber II are equal
Tritium ionization chamber is surveyed for flow gas.
Tritium process tail gas processing system the most according to claim 1, it is characterised in that: described catalytic reactor I (9) is
119-Pd-Al2O3Catalytic reactor, catalytic reactor II (10) is 119-Pd-Al2O3Catalytic reactor and filling Pt are inorganic thin
One in the catalytic reactor of water catalyst.
Tritium process tail gas processing system the most according to claim 1, it is characterised in that: described cooling coil (11) is snakelike
Cooling coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620420052.9U CN205645291U (en) | 2016-05-11 | 2016-05-11 | Tritium technology vent gas treatment system in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620420052.9U CN205645291U (en) | 2016-05-11 | 2016-05-11 | Tritium technology vent gas treatment system in |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205645291U true CN205645291U (en) | 2016-10-12 |
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ID=57059698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620420052.9U Expired - Fee Related CN205645291U (en) | 2016-05-11 | 2016-05-11 | Tritium technology vent gas treatment system in |
Country Status (1)
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| CN (1) | CN205645291U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810277A (en) * | 2016-05-11 | 2016-07-27 | 中国工程物理研究院核物理与化学研究所 | Tritium process tail gas treatment system |
-
2016
- 2016-05-11 CN CN201620420052.9U patent/CN205645291U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810277A (en) * | 2016-05-11 | 2016-07-27 | 中国工程物理研究院核物理与化学研究所 | Tritium process tail gas treatment system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20190511 |