CN2329968Y - Portable methyl iodide gas generator - Google Patents
Portable methyl iodide gas generator Download PDFInfo
- Publication number
- CN2329968Y CN2329968Y CN 98201616 CN98201616U CN2329968Y CN 2329968 Y CN2329968 Y CN 2329968Y CN 98201616 CN98201616 CN 98201616 CN 98201616 U CN98201616 U CN 98201616U CN 2329968 Y CN2329968 Y CN 2329968Y
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- Prior art keywords
- valve
- pneumatic control
- air
- hole
- negative pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 229910052740 iodine Inorganic materials 0.000 abstract description 25
- 239000011630 iodine Substances 0.000 abstract description 25
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 abstract description 24
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 25
- 238000012360 testing method Methods 0.000 description 15
- 230000002285 radioactive effect Effects 0.000 description 6
- 230000005587 bubbling Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- UKRWCEJTOPSTEC-RDTXWAMCSA-N (6ar,9r)-4-acetyl-n-ethyl-7-methyl-6,6a,8,9-tetrahydroindolo[4,3-fg]quinoline-9-carboxamide Chemical compound C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)NCC)C2)=C3C2=CN(C(C)=O)C3=C1 UKRWCEJTOPSTEC-RDTXWAMCSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses an equipment for examining iodine adsorber removes iodine performance can take formula methyl iodide gas generator. The device comprises a negative pressure box, a compressed air distributor arranged on the negative pressure box, a methyl iodine generator arranged in the negative pressure box and a pneumatic control unit, and is characterized in that the pneumatic control unit is formed by connecting a two-position five-way single pneumatic control reversing valve, a push-pull reversing valve, a micro-pressure signal valve and a one-way valve. The device has good operation safety and stable work, can keep preset pressure difference and prevent radioactivity from escaping, bubbles stably, the generated methyl iodine has high purity, and the generation rate can meet the requirement of the detection of the iodine adsorber.
Description
The utility model belongs to a check out test set of radioactive substance adsorber, concretely relates to a equipment for detecting iodine adsorber removes iodine performance.
An iodine adsorber is a common device for removing radioactive iodine from exhaust gas. In order to meet the use requirements, the iodine removal performance detection test is required before delivery, after field installation and in the operation process. Methyl iodide gas generating device is a core equipment for detecting the iodine removing performance of the iodine adsorber. The portable methyl iodide gas generator includes negative pressure box, compressed air distributor on the negative pressure box, methyl iodide generator inside the negative pressure box and comprising compressed air jet pump, non-return valve, throttle valve, generator body, sleeve needle, oil-free cylinder, small bottle support, fixture, reaction small bottle and methyl iodide outlet fast flange, and pneumatic control unit inside the negative pressure box and comprising micro pressure signal valve and push-pull change valve. The defect is that under abnormal conditions, the micro-pressure signal valve feeds back pressure to the operating handle of the push-pull reversing valve to make the operating handle generate displacement, so that the cylinder without oil supply is reversed, and methyl iodide stops being output. However, compared with the hand pushing force of a human on the control handle, the feedback force is small, so that manual control is still dominant during operation, the automatic protection function cannot be achieved, logical action abnormality or repeated action of the oil-feeding-free cylinder is caused, radioactive methyl iodide pollution is caused, and the automatic protection of the pneumatic control unit is unsafe and reliable.
The utility model aims at providing a pneumatic control unit automatic protection safe and reliable's portable methyl iodide gas generator.
To achieve the above object, the present invention is implemented as follows: a portable methyl iodine gas generating device comprises a negative pressure box, a compressed air distributor arranged on the negative pressure box, a methyl iodine generator arranged in the negative pressure box and formed by connecting a compressed air jet pump, a one-way valve, a throttle valve, a generator body, a sleeve needle, an oil-free cylinder, a small bottle supporting plate, a clamp, a reaction small bottle and a methyl iodine outlet quick-connection flange, and a pneumatic control unit arranged in the negative pressure box and formed by connecting a micro-pressure signal valve and a push-pull reversing valve, wherein the pneumatic control unit also comprises a two-position five-way single pneumatic control reversing valve and two one-way valves. The air inlet of the two-position five-way single pneumatic reversing valve is connected with the air supply port of the compressed air distributor, which is used for a pneumatic control unit, one air outlet of the two-position five-way single pneumatic reversing valve is connected with the upper air inlet of the oil-free air cylinder through a one-way valve, the other air outlet of the two-position five-way single pneumatic reversing valve is connected with the air inlet of the push-pull reversing valve, and the control hole of the two-position five-way single pneumatic; one air outlet hole of the push-pull reversing valve is connected with a lower air inlet hole of the oil-free cylinder, and the other air outlet hole of the push-pull reversing valve is connected with an upper air inlet hole of the oil-free cylinder through another one-way valve; the air inlet of the micropressure signal valve is connected with the air supply port of the compressed air distributor for the pneumatic control unit, and the signal input hole of the micropressure signal valve is connected with the air suction port of the compressed air jet pump.
Compared with the existing portable methyl iodide gas generation device, the gas circuit of the device is improved from the control principle, a two-position five-way single gas control reversing valve and two one-way valves are additionally arranged in the pneumatic control unit, so that the pneumatic control unit, the micro-pressure signal valve and the push-pull reversing valve form an automatic protector together, the pneumatic control unit reflects the principle that safety protection instructions are prior under abnormal conditions, the possibility of manual misoperation is avoided, and the safety and reliability of automatic protection of the pneumatic control unit are greatly improved.
The present invention will now be described in detail with reference to the accompanying drawings and examples:
fig. 1 is a schematic structural view of a portable methyl iodide gas generator provided by the present invention;
FIG. 2 is a schematic view of the structure of the negative pressure tank and its accessories;
FIG. 3 is a schematic diagram of a test loop for testing an iodine adsorber in accordance with the present apparatus.
As shown in figure 1, the portable methyl iodide gas generator comprises a negative pressure box 2, a compressed air distributor 4 arranged on the negative pressure box 2 and a compressed air jet pump 21 connected with an air supply port of the compressed air distributor 4 and used for maintaining the negative pressure of the negative pressure box 2, wherein an air suction pipe of the compressed air jet pump 21 extends into the negative pressure box 2, and an iodine remover 20 is arranged on the air suction port of the compressed air jet pump. A methyl iodine generator which is formed by connecting a compressed air jet pump 3, a one-way valve 5, a throttle valve 6, a generator body 23, a sleeve needle 18, an oil-free cylinder 13, a small bottle supporting plate, clamps 15 and 16, a reaction small bottle 17 and a methyl iodine outlet quick-connection flange 24 is arranged in the negative pressure box 2. The compressed air injection pump 3 is supplied with air by a compressed air distributor 4, a one-way valve 5 is connected on an air suction port of the compressed air injection pump 3, the lower end of the one-way valve is connected with a throttle valve 6, the lower end of the throttle valve 6 is connected with a generator body 23, and a sleeve needle 18 is arranged on the generator body 23. The oilless cylinder 13 is mounted on a support 14, and a vial pallet and clamps 15 and 16 for clamping a reaction vial 17 are mounted on a piston rod of the oilless cylinder in a linkage manner. The air inlet of the generator body 23 is connected with an air inlet pipe 204 through a connecting pipe and a wall-penetrating right-angle elbow 203, the connecting pipe is provided with a rotor flow meter 22, the air inlet pipe 204 is provided with an iodine remover fixing seat 206, and an air inlet iodine remover 1 is arranged on the air inlet pipe. Here, the air outside the negative pressure tank 2 is communicated with the inner needle tube of the sleeve needle 18 through the generator body 23, and the air suction port of the compressed air injection pump 3 is communicated with the sleeve and the inner needle tube of the sleeve needle 18The gaps between the two parts are communicated. The negative pressure box 2 is also provided with a pneumatic control unit which is formed by connecting a micro-pressure signal valve 8, a push-pull reversing valve 10, one-way valves 7 and 9 and a two-position five-way single pneumatic control reversing valve 11. An air inlet hole P of the two-position five-way single pneumatic control reversing valve 11 is connected with an air supply hole of the compressed air distributor 4 for a pneumatic control unit, one air outlet hole A of the two-position five-way single pneumatic control reversing valve is connected with an upper air inlet hole of the oil-free air cylinder 13 through a one-way valve 9, the other air outlet hole B of the two-position five-way single pneumatic control reversing valve is connected with an air inlet hole P of the push-pull reversing valve 10, a control hole K of the two-position five-way single pneumatic control reversing valve is; one air outlet hole a of the push-pull reversing valve 10 is connected with a lower air inlet hole of the oil-free cylinder 13, and the other air outlet hole b is connected with an upper air inlet hole of the oil-free cylinder 13 through the one-way valve 7; the air inlet M of the micropressure signal valve 8 is connected with the air supply pipeline of the pneumatic control unit of the compressed air distributor 4, and the signal input hole N thereofAnd is connected to an intake port of the compressed air injection pump 3. The bottom of the negative pressure box 2 is provided with a base 19, and the side surface is provided with a vacuum meter 25. The model of the two-position five-way single pneumatic control reversing valve 11 is K25K, and the model of the micro-pressure signal valve 8 is M/21C/TU2The model of the push-pull reversing valve 10 is AL-8, and the models of the one-way valves 7 and 9 are ALA-10.
In order to prevent a small amount of radioactive gas escaping during the methyl iodide output process from being directly discharged into the environment, the device is provided with a negative pressure box and accessories thereof, as shown in figure 2. The methyl iodine generator, the pneumatic control unit and the indicating instrument are all arranged in the negative pressure box 2. The box 2 is provided with two hand holes 216 and an independent feed hole (not shown) which are provided with cover plates. The negative pressure box 2 has a transparent box body, and an operator can monitor the methyl iodide generation process outside the box. The negative pressure in the box is maintained by a compressed air jet pump 21, and the gas in the box 2 is treated by an iodine remover 20 before being discharged outside. The tank 2 is provided with a compressed air distributor 4, on which an air supply switch 209 of the generator compressed air jet pump 3, an air supply switch 210 of the pneumatic control unit, an air supply switch 212 of the compressed air jet pump 21 and a distributor air supply connection 211 are provided. The box 2 is provided with a through-wall right-angle elbow 203, an air inlet pipe 204, an iodine remover fixing seat 206 and a compressed air quick connector 205 which are respectively used for supplying air to the compressed air jet pump 3 and the two-position five-way single pneumatic reversing valve 11, and a methyl iodine outlet pipe 215 connected with the outlet of the compressed air jet pump 3. A handle 213 is provided on the top of the case 2 for carrying the device.
When in use, Na is filled in the negative pressure box 2127I and Na131Reaction vial 17 (ampoule) of mixed solution I is filled with excess (CH)3)2SO4The following reactions were allowed to occur in the vial:
Under normal conditions, the air suction port of the compressed air injection pump 3 is in negative pressure, at the moment, the micro-pressure signal valve 8 has no instruction output, air is supplied to the push-pull reversing valve 10 through the two-position five-way single-air control reversing valve 11, an operator can pull the handle of the push-pull reversing valve 10 arranged outside the negative pressure box 2 outwards or push the handle inwards by operating the handle of the push-pull reversing valve 10, so that the lifting of the piston of the oil-feeding-free cylinder 13 is controlled, and the starting and stopping of the generation of the methyl iodide gas are controlled. However, in abnormal situations, for example, when methyl iodide is output, the methyl iodide injection pipeline valve forgets to open, or the resistance of the injection pipeline is too large, which may cause the compressed air jet pump 3 to form a positive pressure at its gas inlet due to the gas outlet being not smooth, in order to prevent the radioactive gas in the reaction vial 17 from being reversely pressed out by the pressure, the device is improved in a pneumatic control unit except that the check valve 5 is installed at the gas inlet of the compressed air jet pump 3. At the moment when the air suction port of the compressed air injection pump 3 becomes positive pressure, the micro-pressure signal valve 8 immediately starts to act after receiving the positive pressure signal, outputs pressure to the control hole K of the two-position five-way single pneumatic control reversing valve 11 to close the air outlet hole B, cuts off the air source of the push-pull reversing valve 10 to disable the manual control of the push-pull reversing valve 10, meanwhile, the air outlet hole A of the two-position five-way single pneumatic control reversing valve 11 is opened, the air is filled to the upper air inlet hole of the oil-free air cylinder 13 through the one-way valve 9, the reaction vial 17 is lowered to separate from the sleeve needle 18, and the output of methyl iodide is stopped. The pneumatic control unit plays a role in safety protection. In addition, although the pneumatic control unit has a starting time of about 2 seconds, the methyl iodine generator gas circuit is provided with the one-way valve 5, so that only a small amount of air reversely enters the reaction vial 17 in the starting time, and the radioactive liquid cannot escape. After the exception is eliminated, the protection state can be automatically released, so that the device recovers the normal methyl iodide output.
The main technical indexes and the operating conditions of the device are as follows:
1. methyl iodine generator
The working pressure of the jet pump is adjustable from 0.24MPa to 0.50MPa
The vacuum degree of a pump air suction port is 0.039MPa-0.074MPa and is adjustable
Maximum compressed air consumption of 5.30m3/h
The carrier gas flow is adjustable between 6.0L/h and 60.0L/h, and the recommended rate is between 20.0L/h and 50.0L/h
The vacuum degree of the bubbling chamber is 70DaPa-210DaPa adjustable, and 80DaPa-170DaPa is recommended
Opening pressure of one-way valve is 0.014MPa
The maximum reverse leakage rate of the check valve is less than or equal to 0.058mL/s
The length of the slide rail is 320mm
2. Pneumatic control and safety protection system
Minimum working gas pressure 0.20MPa
Starting threshold of pneumatic control unit is 0.01MPa
The starting time is less than or equal to 2s
3. Negative pressure box
When the hand hole is closed, the vacuum degree in the box is 60DaPa-200DaPa and can be adjusted,
recommended 60DaPa-150DaPa
When the hand hole is opened, the ventilation rate in the box is adjustable for 30 times/h-60 times/h,
recommending 30 times/h-50 times/h
Maximum air consumption of jet pump is 10.95m3/h
4. Three stage protective differential pressure
The inside of the box is lower than the outside of the box and is more than or equal to 60DaPa
The inner part of the bottle is lower than the inner part of the box by more than or equal to 10DaPa
The air pumping opening of the air pump of the generator in the bottle is more than or equal to 20KPa
5. Operating conditions
The temperature in the generator is more than or equal to 5 ℃, and more than or equal to 20 ℃ is recommended
Compressed air is subjected to oil removal, water removal and filtration
6. Volume and weight
The weight of the whole machine is about 35kg
Volume 550mm 450mm 400mm
7. Structural material
The main metal piece is made of stainless steel material, and the others are copper pieces subjected to electroplating or other surface treatment; the negative pressure box, the penetrating piece, the cylinder support and the like are made of organic glass materials.
The test loop for testing the iodine removing performance of the iodine adsorber by using the device is shown in figure 3. In FIG. 3, 301-air intake filter, 302-heater, 303-mixing box, 304-methyl iodide injection port, 305-injection pipe, 306-portable methyl iodide gas generator, 307, 312-airborne iodine sampler, 308,311-Venturi flowmeter, which are connected to sampling pump, 309-U-tube differential pressure gauge, 310-iodine adsorber test stand, 313-backup guard carbon bed, 314-centrifugal fan, and exhaust gas is exhausted to chimney.
The purpose of the complete machine thermal test is to determine the purity of methyl iodide generated by the device and test the operation reliability of the device. The test process is as follows: the test apparatus was connected as shown in FIG. 3 and the generator was started to inject methyl iodide into the system. The injection time of methyl iodide in each test was 30 min. The sampling point was set at the center of the test tube far enough from the injection port, and a DQ-2 type airborne iodine sampler was used at 3.0M3Sampling is carried out on the flow of/h, the sampling time is 45min, and the running air quantity of atest ventilation pipeline is 1200M3H (deviation not exceeding. + -. 5%). Test results show that the device 306 has good operational safety, works stably, can maintain a predetermined pressure differential, and prevents airborne radioactivity from escaping. The bubbling process is stable, the generated methyl iodide has high purity, and the generation rate can meet the requirement of on-site inspection of an iodine absorber.
Claims (1)
1. The utility model provides a portable methyl iodide gas generator, it includes negative pressure tank (2), establish compressed air distributor (4) on negative pressure tank (2), establish by compressed air jet pump (3) in negative pressure tank (2), check valve (5), choke valve (6), generator body (23), sleeve pipe syringe needle (18), no oil feeding cylinder (13), vial layer board and anchor clamps (15) and (16), reaction vial (17), methyl iodide export connects the methyl iodide generator of constituteing soon flange (24) connection, and establish and include by minute-pressure signal valve (8) in negative pressure tank (2), the pneumatic control unit of constitution is connected in push-and-pull switching-over valve (10), its characterized in that: a two-position five-way single pneumatic control reversing valve (11) and check valves (7) and (9) are also arranged in the pneumatic control unit, an air inlet hole P of the two-position five-way single pneumatic control reversing valve (11) is connected with an air supply hole of the compressed air distributor (4) for the pneumatic control unit, one air outlet hole A of the two-position five-way single pneumatic control reversing valve is connected with an upper air inlet hole of the cylinder without oil supply (13) through the check valve (9), the other air outlet hole B of the two-position five-way single pneumatic control reversing valve is connected with an air inlet hole P of the push-pull reversing valve (10), a control hole K of the control hole is connected with an air outlet hole of the micro-pressure signal valve (8), one air outlet hole a of the push-pull reversing valve (10) is connected with a lower air inlet hole of the cylinder without oil supply (13), the other air outlet hole B of the control hole is connected with the upper air inlet hole of the cylinder without oil, the signal input hole N is connected with the air suction port of the compressed air injection pump (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98201616 CN2329968Y (en) | 1998-02-25 | 1998-02-25 | Portable methyl iodide gas generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98201616 CN2329968Y (en) | 1998-02-25 | 1998-02-25 | Portable methyl iodide gas generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2329968Y true CN2329968Y (en) | 1999-07-21 |
Family
ID=33958851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98201616 Expired - Lifetime CN2329968Y (en) | 1998-02-25 | 1998-02-25 | Portable methyl iodide gas generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2329968Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011153930A1 (en) * | 2010-06-07 | 2011-12-15 | 中国广东核电集团有限公司 | Reagent for testing purification capacity of radioactive gas in nuclear power plant, preparation method thereof and iodide filter testing equipment using this reagent |
| CN102629493A (en) * | 2012-04-17 | 2012-08-08 | 哈尔滨工程大学 | Dynamic distribution system of gaseous methyl iodine |
| CN102633592A (en) * | 2011-02-14 | 2012-08-15 | 韩国水力原子力株式会社 | Method and device for synthesizing radioactive methyl iodine tracer |
| CN106872225A (en) * | 2015-12-10 | 2017-06-20 | 中国科学院大连化学物理研究所 | A kind of water sample pretreatment device and its application method |
| CN111006922A (en) * | 2019-11-15 | 2020-04-14 | 中国辐射防护研究院 | Methyl iodide gas generation method and generator for detecting efficiency of iodine adsorber |
-
1998
- 1998-02-25 CN CN 98201616 patent/CN2329968Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011153930A1 (en) * | 2010-06-07 | 2011-12-15 | 中国广东核电集团有限公司 | Reagent for testing purification capacity of radioactive gas in nuclear power plant, preparation method thereof and iodide filter testing equipment using this reagent |
| KR101524649B1 (en) * | 2010-06-07 | 2015-06-01 | 차이나 제너럴 뉴클리어 파워 코퍼레이션 | Reagent for Testing Purification capacity of Radioactive Gas In Unclear Power Plant, Preparation Method Thereof And Iodide Filter Testing Equipment Using This Reagent |
| CN102633592A (en) * | 2011-02-14 | 2012-08-15 | 韩国水力原子力株式会社 | Method and device for synthesizing radioactive methyl iodine tracer |
| CN102633592B (en) * | 2011-02-14 | 2014-11-05 | 韩国水力原子力株式会社 | Method and device for synthesizing radioactive methyl iodine tracer |
| CN102629493A (en) * | 2012-04-17 | 2012-08-08 | 哈尔滨工程大学 | Dynamic distribution system of gaseous methyl iodine |
| CN102629493B (en) * | 2012-04-17 | 2014-08-20 | 哈尔滨工程大学 | Dynamic distribution system of gaseous methyl iodine |
| CN106872225A (en) * | 2015-12-10 | 2017-06-20 | 中国科学院大连化学物理研究所 | A kind of water sample pretreatment device and its application method |
| CN111006922A (en) * | 2019-11-15 | 2020-04-14 | 中国辐射防护研究院 | Methyl iodide gas generation method and generator for detecting efficiency of iodine adsorber |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |