CN112429704B - an iodine chamber system - Google Patents
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- CN112429704B CN112429704B CN202011405985.8A CN202011405985A CN112429704B CN 112429704 B CN112429704 B CN 112429704B CN 202011405985 A CN202011405985 A CN 202011405985A CN 112429704 B CN112429704 B CN 112429704B
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- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 229910052740 iodine Inorganic materials 0.000 title claims abstract description 114
- 239000011630 iodine Substances 0.000 title claims abstract description 114
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000001179 sorption measurement Methods 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 24
- 239000007795 chemical reaction product Substances 0.000 claims description 24
- 238000012544 monitoring process Methods 0.000 claims description 19
- 230000002572 peristaltic effect Effects 0.000 claims description 19
- 238000005086 pumping Methods 0.000 claims description 17
- 239000007832 Na2SO4 Substances 0.000 claims description 13
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 13
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 13
- 239000002274 desiccant Substances 0.000 claims description 12
- -1 polytetrafluoroethylene Polymers 0.000 claims description 12
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 12
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002285 radioactive effect Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 14
- 238000012806 monitoring device Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001730 gamma-ray spectroscopy Methods 0.000 description 1
- XKUYOJZZLGFZTC-UHFFFAOYSA-K lanthanum(iii) bromide Chemical compound Br[La](Br)Br XKUYOJZZLGFZTC-UHFFFAOYSA-K 0.000 description 1
- 238000003904 radioactive pollution Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/13—Iodine; Hydrogen iodide
- C01B7/14—Iodine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/005—Details of radiation-measuring instruments calibration techniques
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Treating Waste Gases (AREA)
Abstract
本公开属于放射源制备技术领域，具体涉及一种用于制备活性炭滤盒源的碘室系统。该碘室系统包括气体生成系统、空气提供系统、吸附系统及存储系统；其中气体生成系统、空气提供系统及吸附系统均通过管路与存储系统连接。该系统具有能够保持碘浓度稳定、减少碘损失且目标滤盒源活度和分布可调的有益效果。
The present disclosure belongs to the technical field of radioactive source preparation, and in particular relates to an iodine chamber system for preparing an activated carbon filter box source. The iodine chamber system includes a gas generation system, an air supply system, an adsorption system and a storage system; wherein the gas generation system, the air supply system and the adsorption system are all connected with the storage system through pipelines. The system has the beneficial effects of keeping the iodine concentration stable, reducing the iodine loss, and adjusting the activity and distribution of the target filter cartridge source.
Description
Technical Field
The utility model belongs to the technical field of the radiation source preparation, concretely relates to iodine room system for preparing active carbon filter cartridge source.
Background
Radionuclides, especially radioactive131And I is a key attention object of nuclear facility operation monitoring, nuclear emergency monitoring and environment monitoring. The monitoring method comprises the following steps: using active carbon filter box to filter air131I is collected by adsorption and analyzed by a NaI (Tl) detector for gamma spectrometry. The research shows that the compound has the advantages of high purity,131i, the adsorption capacity in the activated carbon filter box presents exponential distribution along with the depth of the filter box, and in order to guarantee the accuracy of a monitoring value, an exponential distribution activated carbon filter box standard source is needed to be adopted for carrying out efficiency calibration on monitoring equipment.
Two preparation methods have been studied at present: firstly, adopting surface source simulation preparation, and secondly adopting131I, carrying out adsorption preparation on the gas. The former adopts surface source simulation preparation, needs to carry out preparation of a plurality of sources and carries out positioning filling, and the preparation process is time-consuming and complex, and simultaneously, because of the fact that131The half life of I is only 8 days, which is not beneficial to the rapid preparation and use of standard source; by using131The adsorption preparation of the I gas can effectively improve the efficiency, but the existing method adopting a gas generator to generate and adsorb is mainly used for researching the adsorption efficiency of the activated carbon, and the method does not need to accurately control the adsorption condition, so that the standard source of the activated carbon filter box with certain target activity or distribution cannot be accurately prepared.
Disclosure of Invention
Objects of the invention
In accordance with the problems of the prior art, the present disclosure provides an iodine chamber system that can maintain a stable iodine concentration, reduce iodine loss, and provide adjustable source activity and distribution of a target cartridge.
(II) technical scheme
In order to solve the problems existing in the prior art, the technical scheme provided by the disclosure is as follows:
an iodine chamber system, the iodine chamber system comprising a gas generation system, an air supply system, an adsorption system and a storage system; wherein the gas generation system, the air supply system and the adsorption system are all connected with the storage system through pipelines;
the gas generation system is used for131Generating gas, which mainly comprises a reaction container, a peristaltic pump, a first circulating pump and a first filter, wherein the reaction container is positioned in a constant-temperature water bath; a gas replacing device capable of replacing gas in the glove box is arranged outside the glove box; the first filter is positioned at the rear end of the reaction container and used for drying and removing water vapor in the gas generated by the reaction container, and the dried gas is driven by the circulating pump to enter the iodine chamber storage chamber of the storage system.
The air supply system is mainly used for balancing or emptying gas in an iodine chamber storage chamber and mainly comprises a fan, a second filter, a water removal column, an activated carbon column, a regulating valve, a flowmeter and a one-way valve; wherein the blower is mainly used for pumping air into the iodine chamber storage chamber; the second filter, the water removal column and the activated carbon column are used for purifying air; the regulating valve and the flow meter are used for controlling the pumping air flow rate; the one-way valve is used for controlling the on-off of the air flow and preventing the air from flowing backwards.
The adsorption system is positioned in the constant temperature box and used for preparing a filter cartridge source; the device mainly comprises an active carbon filter box, a tail gas adsorption device and a buffer tank; the buffer tank is a first buffer tank and a second buffer tank which are connected in parallel, and the vacuum pump is connected with the two buffer tanks and used for pumping negative pressure for the buffer tanks; the tail gas adsorption device is connected with the vacuum pump through a pipeline and is used in tail gas131I, adsorption of gas to prevent radioactive pollution; the first buffer tank and the second buffer tank are used for alternately storing adsorbed gas and performing volume setting; the activated carbon filter box is used for131I gas adsorption, i.e. forAnd (4) preparing an activated carbon filter box source.
The storage system comprises an iodine chamber storage chamber, a heating device and a corresponding monitoring device. Wherein the iodine chamber storage chamber is for storing the gas generated by the gas generating system131I, gas; the monitoring equipment comprises temperature, pressure, humidity and radiation monitoring equipment. Wherein the working pressure of the iodine chamber storage chamber is 1 plus or minus 0.01MPa, and the temperature is between room temperature and 80 ℃;
preferably, the reaction vessel is provided with three interfaces, wherein one interface is connected with the iodine chamber storage chamber through a gas transmission pipeline where the first filter is located; the other two interfaces are respectively connected with the reaction product sample inlet pipe and a gas return pipe of the iodine chamber storage chamber; wherein the gas return pipe is a part for storing the iodine chamber131I, refluxing the gas into the reaction container;
preferably, the reaction product and the reaction formula in the reaction vessel are:
2Na131I+Fe2(SO4)3＝2FeSO4+Na2SO4+131I2
or
2Na131I+H2SO4+H2O2＝Na2SO4+2H2O+131I2
Or
2Na131I+2HNO3+H2O2＝2NaNO3+2H2O+131I2
Or
2Na131I+(CH3)2SO4＝Na2SO4+2CH3 131I；
Preferably, the reaction product and the reaction formula in the reaction vessel are:
2Na131I+Fe2(SO4)3＝2FeSO4+Na2SO4+131I2
or
2Na131I+(CH3)2SO4＝Na2SO4+2CH3 131I
Preferably, the peristaltic pump is used for adding the reaction product into the reaction container, controlling the reaction rate and the total amount, and the rotating speed of the peristaltic pump is adjustable within 0-30 mL/min. The first circulating pump is used for circulating the generated substances in the reaction vessel131I2The gas is conveyed to the iodine chamber storage chamber through a gas conveying pipeline, and the flow rate of the gas is adjustable at 0-30L/min.
Preferably, the gas transmission pipeline is a stainless steel pipeline, the inner wall of the gas transmission pipeline is mirror stainless steel or sprayed with polytetrafluoroethylene, and the inner diameter of the gas transmission pipeline is preferably 0.5-3 cm.
Preferably, the first filter and the second filter are used for removing water vapor in the gas, and a crystalline water type desiccant CaSO is placed in the first filter and the second filter4Or a CaO desiccant.
Preferably, the temperature of the incubator is between room temperature and 80 ℃.
Preferably, the number of the buffer tanks is 2, and the volumes of the buffer tanks are 20-200L respectively.
Preferably, the inner wall of the iodine chamber storage chamber is sprayed with polytetrafluoroethylene, and the outer wall of the iodine chamber storage chamber is provided with a heat insulation layer.
Preferably, the temperature of the thermostatic water bath is 64-66 ℃.
Preferably, the volume of the iodine chamber storage chamber is 1-6 m3。
(III) advantageous effects
The utility model provides an iodine room system adopts bulky iodine room locker room to carry out iodine gas storage, reduces the influence of filter cartridge source activity degree of gas concentration change in the filter cartridge source preparation process, and the stability of preparation parameter is high. The inner walls of the iodine chamber storage chamber and the gas transmission pipeline are sprayed with polytetrafluoroethylene, so that the loss caused by wall adsorption is reduced.
The gas passing through the activated carbon filter cartridge is alternately collected by the buffer tank, and one is evacuated while the other is collected, alternately. When each buffer tank is collected at every time, software can automatically record the gas temperature and the pressure change of the buffer tanks before and after collection, the volume of the buffer tanks is combined, the gas volume collected at the time can be calculated through a gas state equation, and the two buffer tanks are sequentially collected alternately to obtain the total volume of the activated carbon filter box. The volume of the adsorbed air can be accurately determined, and the accuracy of volume activity and concentration is improved.
Drawings
FIG. 1 is a schematic view of an iodine chamber system; wherein 1 is a reaction vessel; 2 is a peristaltic pump; 3 is a first circulation pump; 4 is a first filter; 5 is a heating device; 6 is a motor; 7 is a water removal column; 8 is an activated carbon column; 9 is a second filter; 10 is a fan; 11 is an iodine chamber storage chamber; 12 is an activated carbon filter cartridge; 13 is a first buffer tank; 14 is a second surge tank; 15 is a lanthanum bromide detector; 17 is an external exhaust fan; 18 is a second circulation pump; 19 is a tail gas adsorption unit;
Detailed Description
The disclosure will be further described with reference to specific embodiments and drawings attached to the specification.
Example 1
An iodine chamber system, the iodine chamber system comprising a gas generation system, an air supply system, an adsorption system and a storage system; wherein the gas generation system, the air supply system and the adsorption system are all connected with the storage system through pipelines;
the gas generation system is used for131Generating gas, which mainly comprises a reaction container 1, a peristaltic pump 2, a first circulating pump 3 and a first filter 4 which are positioned in a glove box, wherein the reaction container 1 is placed in a constant-temperature water bath with the temperature of 65 ℃; a gas replacing device capable of replacing gas in the glove box is arranged outside the glove box; the first filter 4 is located at the rear end of the reaction vessel 1 and is used for drying and removing water vapor in the gas generated by the reaction vessel 1, and the dried gas is driven into an iodine chamber storage chamber 11 of the storage system by the first circulating pump 3. The reaction vessel 1 is provided with three interfaces, wherein one interface is connected with an iodine chamber storage chamber 11 through a gas transmission pipeline where the first filter 4 is located; the other two interfaces are respectively connected with a reaction product sample inlet pipe and a gas return pipe of the iodine chamber storage chamber 11; wherein the gas return pipe is a part for storing the iodine chamber in the chamber 11131I, refluxing the gas into the reaction container 1; the reaction vesselThe reaction product and the reaction formula in 1 are as follows:
2Na131I+Fe2(SO4)3＝2FeSO4+Na2SO4+131I2(ii) a The peristaltic pump 2 is used for adding reaction products into the reaction container 1, controlling the reaction rate and the total amount, and the rotating speed of the peristaltic pump is adjustable within 0-30 mL/min. The first circulation pump 3 is used for circulating the reaction product generated in the reaction vessel 1131I2The gas is conveyed to the iodine chamber storage chamber 11 through a gas conveying pipeline, and the flow rate of the gas is adjustable at 0-30L/min.
The air supply system is mainly used for balancing or emptying the gas in an iodine chamber storage chamber 11 and mainly comprises a fan, a second filter 9, a water removal column 7, an activated carbon column 8, a regulating valve, a flowmeter and a one-way valve; wherein the blower is mainly used for pumping air into the iodine chamber storage chamber 11; the second filter 9, the dewatering column 7 and the activated carbon column 8 are used for purifying air; the regulating valve and the flow meter are used for controlling the pumping air flow rate; the one-way valve is used for controlling the on-off of the air flow and preventing the air from flowing backwards.
The adsorption system is positioned in the constant temperature box and used for preparing a filter cartridge source; the device mainly comprises an active carbon filter box 12, a tail gas adsorption device 19 and a buffer tank; the buffer tank is composed of a first buffer tank 13 and a second buffer tank 14 which are connected in parallel, a vacuum pump is connected with the two buffer tanks and used for pumping negative pressure for the buffer tanks, and the volume of each buffer tank is 100L. The tail gas adsorption device 19 is connected with a vacuum pump through a pipeline and is used in tail gas131I, adsorption of gas to prevent pollution; the first buffer tank 13 and the second buffer tank 14 are used for alternately storing adsorbed gas and performing volume setting; the activated carbon filter cartridge 12 is used for131And I, adsorbing the gas, namely preparing an activated carbon filter cartridge source.
The storage system comprises an iodine chamber storage chamber 11, a heating device and a corresponding monitoring device. Wherein the iodine chamber storage chamber 11 is used to store the gas generated by the gas generating system131I, gas; the monitoring equipment comprises temperature, pressure, humidity and radiation monitoring equipment. Wherein the working pressure of the iodine chamber storage chamber 11 is 1 plus or minus 0.01MPa, and the temperature is 30 ℃; the inner wall of the iodine chamber storage chamber is sprayed with polytetrafluoroethylene, and the outer wall is provided withThe volume of the heat-insulating layer and the iodine chamber storage chamber is 3m3。
The first filter 4 and the second filter 9 are used for removing water vapor in the gas, and a crystal water type desiccant CaSO is arranged in the first filter 4 and the second filter 94A desiccant. The gas transmission pipeline is made of stainless steel, the inner wall of the gas transmission pipeline is made of mirror-surface stainless steel or sprayed with polytetrafluoroethylene, and the inner diameter of the gas transmission pipeline is preferably 0.5 cm.
Example 2
An iodine chamber system, the iodine chamber system comprising a gas generation system, an air supply system, an adsorption system and a storage system; wherein the gas generation system, the air supply system and the adsorption system are all connected with the storage system through pipelines;
the gas generation system is used for131Generating gas, which mainly comprises a reaction container 1, a peristaltic pump 2, a first circulating pump 3 and a first filter 4 which are positioned in a glove box, wherein the reaction container 1 is placed in a constant-temperature water bath with the temperature of 64 ℃; a gas replacing device capable of replacing gas in the glove box is arranged outside the glove box; the first filter 4 is located at the rear end of the reaction vessel 1 and is used for drying and removing water vapor in the gas generated by the reaction vessel 1, and the dried gas is driven into an iodine chamber storage chamber 11 of the storage system by the first circulating pump 3. The reaction vessel 1 is provided with three interfaces, wherein one interface is connected with an iodine chamber storage chamber 11 through a gas transmission pipeline where the first filter 4 is located; the other two interfaces are respectively connected with a reaction product sample inlet pipe and a gas return pipe of the iodine chamber storage chamber 11; wherein the gas return pipe is a part for storing the iodine chamber in the chamber 11131I, refluxing the gas into the reaction container; the reaction product and the reaction formula in the reaction vessel 1 are as follows: 2Na131I+H2SO4+H2O2＝Na2SO4+2H2O+131I2(ii) a The peristaltic pump 2 is used for adding reaction products into the reaction container 1, controlling the reaction rate and the total amount, and the rotating speed of the peristaltic pump is adjustable within 0-30 mL/min. The first circulation pump 3 is used for circulating the reaction product generated in the reaction vessel 1131I2The gas is delivered to the iodine chamber storage chamber 11 through a gas delivery line at a flow rateThe volume is adjustable at 0-30L/min.
The air supply system is mainly used for balancing or emptying the gas in an iodine chamber storage chamber 11 and mainly comprises a fan, a second filter 9, a water removal column 7, an activated carbon column 8, a regulating valve, a flowmeter and a one-way valve; wherein the blower is mainly used for pumping air into the iodine chamber storage chamber 11; the second filter 9, the dewatering column 7 and the activated carbon column 8 are used for purifying air; the regulating valve and the flow meter are used for controlling the pumping air flow rate; the one-way valve is used for controlling the on-off of the air flow and preventing the air from flowing backwards.
The adsorption system is positioned in the constant temperature box and used for preparing a filter cartridge source; the device mainly comprises an active carbon filter box 12, a tail gas adsorption device 19 and a buffer tank; the buffer tanks are a first buffer tank 13 and a second buffer tank 14 which are connected in parallel, the vacuum pump is connected with the two buffer tanks and used for pumping negative pressure for the buffer tanks, and the volume of each buffer tank is 20L; the tail gas adsorption device 19 is connected with a vacuum pump through a pipeline and is used in tail gas131I, adsorption of gas to prevent pollution; the first buffer tank 13 and the second buffer tank 14 are used for alternately storing adsorbed gas and performing volume setting; the activated carbon filter cartridge 12 is used for131And I, adsorbing the gas, namely preparing an activated carbon filter cartridge source.
The storage system comprises an iodine chamber storage chamber 11, a heating device and a corresponding monitoring device. Wherein the iodine chamber storage chamber 11 is used to store the gas generated by the gas generating system131I, gas; the monitoring equipment comprises temperature, pressure, humidity and radiation monitoring equipment. Wherein the working pressure of the iodine chamber storage chamber 11 is 1 plus or minus 0.01MPa, and the temperature is 50 ℃; the inner wall of the iodine chamber storage chamber is sprayed with polytetrafluoroethylene, the outer wall of the iodine chamber storage chamber is provided with a heat preservation layer, and the volume of the iodine chamber storage chamber is 6m3。
The first filter 4 and the second filter 9 are used for removing water vapor in the gas, and a crystal water type desiccant CaO desiccant is arranged in the first filter 4 and the second filter 9. The gas transmission pipeline is made of stainless steel, the inner wall of the gas transmission pipeline is made of mirror-surface stainless steel or sprayed with polytetrafluoroethylene, and the inner diameter of the gas transmission pipeline is preferably 1 cm.
Example 3
An iodine chamber system, the iodine chamber system comprising a gas generation system, an air supply system, an adsorption system and a storage system; wherein the gas generation system, the air supply system and the adsorption system are all connected with the storage system through pipelines;
the gas generation system is used for131Generating gas, which mainly comprises a reaction container 1, a peristaltic pump 2, a first circulating pump 3 and a first filter 4 which are positioned in a glove box, wherein the reaction container 1 is placed in a constant-temperature water bath with the temperature of 66 ℃; a gas replacing device capable of replacing gas in the glove box is arranged outside the glove box; the first filter 4 is located at the rear end of the reaction vessel 1 and is used for drying and removing water vapor in the gas generated by the reaction vessel 1, and the dried gas is driven into an iodine chamber storage chamber 11 of the storage system by a circulating pump. The reaction vessel 1 is provided with three interfaces, wherein one interface is connected with an iodine chamber storage chamber 11 through a gas transmission pipeline where the first filter 4 is located; the other two interfaces are respectively connected with a reaction product sample inlet pipe and a gas return pipe of the iodine chamber storage chamber 11; wherein the gas return pipe is a part for storing the iodine chamber in the chamber 11131I, refluxing the gas into the reaction container; the reaction product and the reaction formula in the reaction vessel 1 are as follows: 2Na131I+2HNO3+H2O2＝2NaNO3+2H2O+131I2(ii) a The peristaltic pump 2 is used for adding reaction products into the reaction container 1, controlling the reaction rate and the total amount, and the rotating speed of the peristaltic pump is adjustable within 0-30 mL/min. The first circulation pump 3 is used for circulating the reaction product generated in the reaction vessel 1131I2The gas is conveyed to the iodine chamber storage chamber 11 through a gas conveying pipeline, and the flow rate of the gas is adjustable at 0-30L/min.
The air supply system is mainly used for balancing or emptying the gas in an iodine chamber storage chamber 11 and mainly comprises a fan, a second filter 9, a water removal column 7, an activated carbon column 8, a regulating valve, a flowmeter and a one-way valve; wherein the blower is mainly used for pumping air into the iodine chamber storage chamber 11; the second filter 9, the dewatering column 7 and the activated carbon column 8 are used for purifying air; the regulating valve and the flow meter are used for controlling the pumping air flow rate; the one-way valve is used for controlling the on-off of the air flow and preventing the air from flowing backwards.
The adsorption systemThe device is positioned in the constant temperature box and used for preparing a filter cartridge source; the device mainly comprises an active carbon filter box 12, a tail gas adsorption device 19 and a buffer tank; the buffer tank comprises a first buffer tank 13 and a second buffer tank 14 which are connected in parallel, a vacuum pump is connected with the two buffer tanks and used for pumping negative pressure for the buffer tanks, and the volume of each buffer tank is 200L; the tail gas adsorption device 19 is connected with a vacuum pump through a pipeline and is used in tail gas131I, adsorption of gas to prevent pollution; the first buffer tank 13 and the second buffer tank 14 are used for alternately storing adsorbed gas and performing volume setting; the activated carbon filter cartridge 12 is used for131And I, adsorbing the gas, namely preparing an activated carbon filter cartridge source.
The storage system comprises an iodine chamber storage chamber 11, a heating device and a corresponding monitoring device. Wherein the iodine chamber storage chamber 11 is used to store the gas generated by the gas generating system131I, gas; the monitoring equipment comprises temperature, pressure, humidity and radiation monitoring equipment. Wherein the working pressure of the iodine chamber storage chamber is 1 plus or minus 0.01MPa, and the temperature is 80 ℃; the inner wall of the iodine chamber storage chamber is sprayed with polytetrafluoroethylene, the outer wall of the iodine chamber storage chamber is provided with a heat preservation layer, and the volume of the iodine chamber storage chamber is 1m3。
The first filter 4 and the second filter 9 are used for removing water vapor in the gas, and a crystal water type desiccant CaO desiccant is arranged in the first filter and the second filter. The gas transmission pipeline is made of stainless steel, the inner wall of the gas transmission pipeline is made of mirror-surface stainless steel or sprayed with polytetrafluoroethylene, and the inner diameter of the gas transmission pipeline is preferably 2 cm.
Example 4
An iodine chamber system, the iodine chamber system comprising a gas generation system, an air supply system, an adsorption system and a storage system; wherein the gas generation system, the air supply system and the adsorption system are all connected with the storage system through pipelines;
the gas generation system is used for131Generating gas, which mainly comprises a reaction container 1, a peristaltic pump 2, a first circulating pump 3 and a first filter 4, wherein the reaction container 1 is arranged in a constant-temperature water bath; a gas replacing device capable of replacing gas in the glove box is arranged outside the glove box; the first filter 4 is positioned after the reaction vesselAnd the end is used for drying and removing water vapor in the gas generated by the reaction container 1, and the dried gas is driven into an iodine chamber storage chamber 11 of the storage system by a circulating pump. The reaction vessel 1 is provided with three interfaces, wherein one interface is connected with an iodine chamber storage chamber 11 through a gas transmission pipeline where the first filter 4 is located; the other two interfaces are respectively connected with a reaction product sample inlet pipe and a gas return pipe of the iodine chamber storage chamber 11; wherein the gas return pipe is a part for storing the iodine chamber in the chamber 11131I, refluxing the gas into the reaction container 1; the reaction product and the reaction formula in the reaction vessel 1 are as follows: 2Na131I+(CH3)2SO4＝Na2SO4+2CH3 131I; the peristaltic pump is used for adding reaction products into the reaction container, reaction rate and total amount are controlled, and the rotating speed of the peristaltic pump is adjustable within 0-30 mL/min. The first circulation pump 3 is used for circulating the reaction product generated in the reaction vessel 1131I2The gas is conveyed to the iodine chamber storage chamber 11 through a gas conveying pipeline, and the flow rate of the gas is adjustable at 0-30L/min.
The air supply system is mainly used for balancing or emptying the gas in an iodine chamber storage chamber 11 and mainly comprises a fan, a second filter 9, a water removal column 7, an activated carbon column 8, a regulating valve, a flowmeter and a one-way valve; wherein the blower is mainly used for pumping air into the iodine chamber storage chamber 11; the second filter 9, the dewatering column 7 and the activated carbon column 8 are used for purifying air; the regulating valve and the flow meter are used for controlling the pumping air flow rate; the one-way valve is used for controlling the on-off of the air flow and preventing the air from flowing backwards.
The adsorption system is positioned in the constant temperature box and used for preparing a filter cartridge source; the device mainly comprises an active carbon filter box 12, a tail gas adsorption device 19 and a buffer tank; the buffer tank comprises a first buffer tank 13 and a second buffer tank 14 which are connected in parallel, a vacuum pump is connected with the two buffer tanks and used for pumping negative pressure for the buffer tanks, and the volume of each buffer tank is 200L; the tail gas adsorption device is connected with the vacuum pump through a pipeline and is used in tail gas131I, adsorption of gas to prevent pollution; the first buffer tank 13 and the second buffer tank 14 are used for alternately storing adsorbed gas and performing volume setting; the activated carbon filter cartridge 12 is used for131I, adsorbing the gas by the gas adsorption device,namely for the preparation of the activated carbon cartridge source.
The storage system comprises an iodine chamber storage chamber 11, a heating device and a corresponding monitoring device. Wherein the iodine chamber storage chamber 11 is used to store the gas generated by the gas generating system131I, gas; the monitoring equipment comprises temperature, pressure, humidity and radiation monitoring equipment. Wherein the working pressure of the iodine chamber storage chamber 11 is 1 plus or minus 0.01MPa, and the temperature is 70 ℃; the inner wall of the iodine chamber storage chamber 11 is sprayed with polytetrafluoroethylene, the outer wall is provided with a heat-insulating layer, and the volume of the iodine chamber storage chamber is 5m3。
The first filter 4 and the second filter 9 are used for removing water vapor in the gas, and a crystal water type desiccant CaO desiccant is arranged in the first filter 4 and the second filter 9. The gas transmission pipeline is made of stainless steel, the inner wall of the gas transmission pipeline is made of mirror-surface stainless steel or sprayed with polytetrafluoroethylene, and the inner diameter of the gas transmission pipeline is preferably 1.5 cm.
Claims (12)
1. An iodine chamber system, characterized in that the iodine chamber system comprises a gas generating system, an air providing system, an adsorption system and a storage system; wherein the gas generation system, the air supply system and the adsorption system are all connected with the storage system through pipelines;
the gas generation system is used for131Generating gas, which mainly comprises a reaction container, a peristaltic pump, a first circulating pump and a first filter, wherein the reaction container is positioned in a constant-temperature water bath; a gas replacing device capable of replacing gas in the glove box is arranged outside the glove box; the first filter is positioned at the rear end of the reaction container and used for drying and removing water vapor in the gas generated by the reaction container, and the dried gas is driven by the first circulating pump to enter an iodine chamber storage chamber of the storage system;
the air supply system is mainly used for balancing or emptying gas in an iodine chamber storage chamber and mainly comprises a fan, a second filter, a water removal column, an activated carbon column, a regulating valve, a flowmeter and a one-way valve; wherein the blower is mainly used for pumping air into the iodine chamber storage chamber; the second filter, the water removal column and the activated carbon column are used for purifying air;
the adsorption system is positioned in the constant temperature box and used for preparing a filter cartridge source; the device mainly comprises an active carbon filter box, a tail gas adsorption device and a buffer tank; the buffer tank is a first buffer tank and a second buffer tank which are connected in parallel, and the vacuum pump is connected with the two buffer tanks and used for pumping negative pressure for the buffer tanks; the tail gas adsorption device is connected with the vacuum pump through a pipeline and is used in tail gas131I, adsorbing gas; the first buffer tank and the second buffer tank are used for alternately storing adsorbed gas and performing volume setting;
the storage system comprises an iodine chamber storage chamber, heating equipment and corresponding monitoring equipment; wherein the iodine chamber storage chamber is for storing the gas generated by the gas generating system131I, gas; the monitoring equipment comprises temperature, pressure, humidity and radiation monitoring equipment.
2. The iodine chamber system of claim 1, wherein the reaction vessel is configured with three ports, one of the ports being connected to the iodine chamber storage compartment via a gas transfer line with the first filter; the other two interfaces are respectively connected with the reaction product sample inlet pipe and a gas return pipe of the iodine chamber storage chamber; wherein the gas return pipe is a part for storing the iodine chamber131And I, refluxing the gas into the reaction vessel.
3. The iodine chamber system of claim 1, wherein the reaction product and reaction formula in said reaction vessel is:
2Na131I+Fe2(SO4)3＝2FeSO4+Na2SO4+131I2
or
2Na131I+H2SO4+H2O2＝Na2SO4+2H2O+131I2
Or
2Na131I+2HNO3+H2O2＝2NaNO3+2H2O+131I2
Or
2Na131I+(CH3)2SO4＝Na2SO4+2CH3 131I。
4. The iodine chamber system of claim 1, wherein the reaction product and reaction formula in said reaction vessel is:
2Na131I+Fe2(SO4)3＝2FeSO4+Na2SO4+131I2
or
2Na131I+(CH3)2SO4＝Na2SO4+2CH3 131I。
5. The iodine chamber system of claim 1, wherein the peristaltic pump is used for adding the reaction product into the reaction container, and the rotating speed of the peristaltic pump is adjustable within a range of 0-30 mL/min; the first circulating pump is used for circulating the generated substances in the reaction vessel131The I gas is conveyed to an iodine chamber storage chamber through a gas conveying pipeline, and the flow rate of the I gas is adjustable at 0-30L/min.
6. The iodine chamber system of claim 5, wherein the gas transmission pipeline is a stainless steel pipeline, the inner wall of the gas transmission pipeline is mirror stainless steel or sprayed with polytetrafluoroethylene, and the inner diameter of the gas transmission pipeline is 0.5-3 cm.
7. The iodine chamber system of claim 1, wherein a crystalline water desiccant CaSO is disposed in said first and second filters4Or a CaO desiccant.
8. The iodine chamber system of claim 1, wherein the temperature of the incubator is between room temperature and 80 ℃.
9. The iodine chamber system of claim 1, wherein the number of the buffer tanks is 2, and the volumes of the buffer tanks are 20-200L respectively.
10. The iodine chamber system of claim 1, wherein an inner wall of the iodine chamber storage chamber is spray-coated with teflon, and an outer wall thereof is provided with an insulation layer.
11. The iodine chamber system of claim 1, wherein the temperature of the thermostatic water bath is 64-66 ℃.
12. The iodine chamber system of claim 1, wherein said iodine chamber storage chamber has a volume of 1-6 m3(ii) a Wherein the working pressure of the iodine chamber storage chamber is 1 plus or minus 0.01MPa, and the temperature is between room temperature and 80 ℃.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3107155A (en) * | 1960-06-23 | 1963-10-15 | Abbott Lab | Radioactive iodine process |
| CN110544544A (en) * | 2019-09-25 | 2019-12-06 | 中国原子能科学研究院 | A device and method for continuously generating iodine vapor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3107155A (en) * | 1960-06-23 | 1963-10-15 | Abbott Lab | Radioactive iodine process |
| CN110544544A (en) * | 2019-09-25 | 2019-12-06 | 中国原子能科学研究院 | A device and method for continuously generating iodine vapor |
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