CN112255217A - Sodium flame method detecting system - Google Patents
Sodium flame method detecting system Download PDFInfo
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- CN112255217A CN112255217A CN202011047989.3A CN202011047989A CN112255217A CN 112255217 A CN112255217 A CN 112255217A CN 202011047989 A CN202011047989 A CN 202011047989A CN 112255217 A CN112255217 A CN 112255217A
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- China
- Prior art keywords
- detection
- air duct
- sodium flame
- sodium
- sampling
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 24
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 24
- 239000011734 sodium Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 64
- 238000005070 sampling Methods 0.000 claims abstract description 25
- 238000005507 spraying Methods 0.000 claims abstract description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 230000002285 radioactive effect Effects 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000000443 aerosol Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000004436 sodium atom Chemical group 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000008275 solid aerosol Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/72—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using flame burners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0095—Preparation of aerosols
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the field of nuclear detection, and particularly relates to a sodium flame method detection system. Nuclear power plants are therefore currently replacing a large number of various ventilation filters each year, generating large radioactive technical wastes. The device comprises a fogging device, an air duct system, a compressed air supply system, a sampling device and a detection device; the fog generating device comprises a fog spraying box, and the fog spraying box is connected with an air duct system. The device is intensive, small and easy to move, and can realize the detection of the air filter in a plurality of nuclear power stations. The container is internally provided with a temperature control exhaust system, so that the operating environment is kept at a normal temperature and a normal humidity environment, and the detection accuracy is ensured.
Description
Technical Field
The invention belongs to the field of nuclear detection, and particularly relates to a sodium flame method detection system.
Background
During the operation of the nuclear power unit, in order to ensure that radioactive substances existing in the control area do not leak to the environment, the radiation control area is provided with a special ventilation system and an air filtering device so as to purify and trap radioactive particles in the air. A large number of various ventilation filters must therefore be replaced each year, generating large radioactive technical waste.
In order to reduce the generation amount of radioactive wastes and reduce cost and improve efficiency, a leadership organization for company waste minimization develops special research and development work of 'nuclear-grade high-efficiency air filter metal framework reuse'. After the reusable filter with the metal frame reaches the service life, the disassembled metal frame is recycled, and glue is filled again for assembly to form a newly produced filter. According to the requirements of the national standard nuclear-grade high-efficiency air filter (GB _ T17939-2015), the produced nuclear-grade high-efficiency air filter needs to be subjected to efficiency and resistance detection. Therefore, the efficiency and resistance detection work of the metal frame multiplexing nuclear-grade high-efficiency air filter needs to be carried out on each nuclear power plant site, so that an intensive mobile sodium flame method detection system of the air filter is developed.
Disclosure of Invention
1. The purpose is as follows:
according to the production condition of the nuclear-grade efficient air filter for assembly and reuse, the efficiency and resistance detection work of the metal frame reuse type nuclear-grade efficient air filter in each nuclear power plant site is realized.
2. The technical scheme is as follows:
a sodium flame method detection system comprises a fogging device, an air duct system, a compressed air supply system, a sampling device and a detection device; the fog generating device comprises a fog spraying box, and the fog spraying box is connected with an air duct system.
The compressed air supply system is placed independently of the fogging device.
The air duct system comprises a fan, a heater and a mixing and drying section; the fan passes through pipeline and heater, mixes dry section, and the baffle-box connects gradually.
The air duct system is positioned below the detection device.
The detection device comprises a hydrogen generator and a detection platform; the hydrogen generator is fixedly arranged below the detection platform, and the sampling valve and the combustor are fixedly arranged on the detection platform.
In the sampling device, the diaphragm valve is arranged on the sampling tube A, the sampling tube B penetrates through the detection device, and the tail end of the sampling tube B is fixedly connected with the buffer tank.
The system is integrally installed in the container.
3. The effect is as follows:
the mobile air filter sodium flame method detection system passes the identification, has good effect after the trial operation, and can meet the requirement of the field on the performance detection of the air filter.
Drawings
FIG. 1 is a front view of a sodium flame method detection system
FIG. 2 is a top view of a sodium flame detection system
FIG. 3 is a front view of a detection table of a sodium flame detection system
FIG. 4 is a front view of a spray box of a sodium flame detection system
FIG. 5 is a top view of a buffer tank of a sodium flame detection system
FIG. 6 is a front view of a buffer box of a sodium flame detection system
FIG. 7 is a three-dimensional view of a sampling tube A
FIG. 8 is a perspective view of sampling tube B
In the figure: 1. a detection table; 2. a spray box; 3. a hydrogen generator; 4. a detection device; 5. a compressed air supply system; 6. a fan; 7. a buffer tank; 8. a sampling tube A; 9. a sampling valve; 10. a sampling tube B; 11. a burner; 12. an aperture valve; 13. a heater; 14. and (5) a mixing and drying section.
Detailed Description
The mobile air filter sodium flame method detection system is designed according to the requirements of 'efficiency and resistance of high efficiency air filter performance test method' (GB/T6165) and is used for detecting the efficiency and resistance of an air filter. The system comprises a detection platform, a fog generating device (fog spraying box), a hydrogen generator, an aerosol and detection device, an air duct system and a compressed air supply system. All the above equipment components are installed in a 40GP container, so that the detection equipment is intensified, miniaturized and easy to circulate, and the detection of the air filter in a plurality of nuclear power stations can be realized. The container is internally provided with a temperature control exhaust system, so that the operating environment is kept at a normal temperature and a normal humidity environment, and the detection accuracy is ensured.
Principle of detection equipment
The sodium flame method detection system of the movable air filter mainly comprises four parts, namely a fogging device, an air duct system and an aerosol sampling and detecting device.
1. Systematic fogging and detection principle
Atomizing the sodium chloride aqueous solution in the spray box 2 by a heater 13 by using clean compressed air to form salt-containing fog drop aerosol; mixed with clean hot air from the fan 6 heated and filtered by the heater 13, water in the fog drops is evaporated in the mixing and drying section 14, and the airflow reaches the buffer tank 7 to form uniform polydisperse solid aerosol. The gas flow from the buffer tank 7 is followed by a stabilization process to substantially equalize the velocity field and concentration field of the aerosol at the orifice of the front sampling tube A8.
The aerosol has a majority particle size of less than 2 μm, a mass median diameter of about 0.5 μm, and a geometric standard deviation of less than 2. The aperture valve 12 of the air duct system controls the air flow after the test to be discharged from the tail end of the air duct. The aerosol sampling is realized by pressing the static pressure in the air duct into the detection system through the front sampling tube B10 and the rear sampling tube B10 of the tested filter, and alternately sampling the front aerosol and the rear aerosol of the filter by rotating the handle of the sampling valve 9. The raw aerosol enters the burner 11 through a flow meter L3. Sodium atoms contained in the aerosol are excited by high temperature of hydrogen flame in a burner to emit yellow characteristic light with the wavelength of about 589nm, and the intensity of the yellow characteristic light is in direct proportion to the mass concentration of the aerosol. The light intensity value of sodium is converted into a light current value by a photoelectric converter and detected by a photoelectric measuring instrument. The filter transmittance P is the ratio of the filtered aerosol concentration to the original aerosol concentration, expressed as a percentage.
2. Plant operation assurance
Detection system
According to the detection principle, special detection system software is provided, all detection data are calculated through a computer, and the correctness of the detection data of the filter is guaranteed.
Air duct system
The air duct system is installed with GB/T6165 design and manufacture, and in order to ensure the accuracy of detection data, a heater is arranged in the air duct system to ensure that the air inlet temperature of the system is not less than +/-5 ℃; the relative humidity of the air at the inlet of the buffer tank is not higher than 30%.
Compressed air supply system
The system detection needs clean compressed air, and a special air compressor is arranged for equipment, so that the normal operation of the detection equipment is ensured. In order to create a good detection environment, the air compressor is placed in a closed sound insulation environment (provided with an air inlet and an air outlet), and noise is effectively reduced.
Temperature control exhaust system
In order to keep the constant temperature and humidity of the operation environment, a temperature control exhaust system is arranged, and when the temperature of the equipment exceeds the standard, the exhaust system is automatically opened, so that the constant temperature and humidity environment is kept inside the equipment.
3. Intensive, small and movable
The air filter detection system is characterized in that all necessary equipment and facilities are installed in a 40GP container, and is generally called as an intensive mobile sodium flame method detection system of the air filter. Has the characteristics of intensification, miniaturization and easy circulation.
Claims (7)
1. A sodium flame method detecting system is characterized in that: the system comprises a fogging device, an air duct system, a compressed air supply system (5), a sampling device and a detection device; the fog generating device comprises a fog spraying box (2), and the fog spraying box (2) is connected with an air duct system.
2. The sodium flame detection system of claim 1, wherein: the compressed air supply system (5) is arranged independently of the fogging device.
3. The sodium flame detection system of claim 1, wherein: the air duct system comprises a fan (6), a heater (13) and a mixing and drying section (14); the fan (6) is connected with the heater (13), the mixing and drying section (14) and the buffer tank (7) in sequence through pipelines.
4. The sodium flame detection system of claim 1, wherein: the air duct system is positioned below the detection device.
5. The sodium flame detection system of claim 1, wherein: the detection device comprises a hydrogen generator (3) and a detection platform (1); the hydrogen generator (3) is fixedly arranged below the detection platform (1), and the sampling valve (9) and the combustor (11) are fixedly arranged on the detection platform (1).
6. The sodium flame detection system of claim 1, wherein: in the sampling device, an aperture valve (12) is arranged behind a sampling tube A (10), a sampling tube B (8) is arranged in front of a detection device (4), and the tail end of the sampling tube B is fixedly connected with a buffer tank (7).
7. The sodium flame detection system of claim 1, wherein: the system is integrally installed in the container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047989.3A CN112255217A (en) | 2020-09-29 | 2020-09-29 | Sodium flame method detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047989.3A CN112255217A (en) | 2020-09-29 | 2020-09-29 | Sodium flame method detecting system |
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| Publication Number | Publication Date |
|---|---|
| CN112255217A true CN112255217A (en) | 2021-01-22 |
Family
ID=74233280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011047989.3A Pending CN112255217A (en) | 2020-09-29 | 2020-09-29 | Sodium flame method detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112255217A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE738810A (en) * | 1968-10-01 | 1970-02-16 | ||
| EP0308357A2 (en) * | 1987-09-14 | 1989-03-22 | Tecnicas Especiales De Reduccion, S.A. | Mobile incinerator system for low level radioactive solid waste |
| CN203657986U (en) * | 2013-12-31 | 2014-06-18 | 中核核电运行管理有限公司 | Nucleus ventilation purifying system pressure leak detection test device |
| CN107636448A (en) * | 2016-06-29 | 2018-01-26 | 深圳市爱诺实业有限公司 | High purity water trace amounts of sodium on-line computing model and its on-line monitoring method and device |
| CN111678851A (en) * | 2020-05-08 | 2020-09-18 | 大亚湾核电运营管理有限责任公司 | Nuclear power plant filter performance detection system |
| CN215218555U (en) * | 2020-09-29 | 2021-12-17 | 中核核电运行管理有限公司 | Sodium flame method detecting system |
-
2020
- 2020-09-29 CN CN202011047989.3A patent/CN112255217A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE738810A (en) * | 1968-10-01 | 1970-02-16 | ||
| EP0308357A2 (en) * | 1987-09-14 | 1989-03-22 | Tecnicas Especiales De Reduccion, S.A. | Mobile incinerator system for low level radioactive solid waste |
| CN203657986U (en) * | 2013-12-31 | 2014-06-18 | 中核核电运行管理有限公司 | Nucleus ventilation purifying system pressure leak detection test device |
| CN107636448A (en) * | 2016-06-29 | 2018-01-26 | 深圳市爱诺实业有限公司 | High purity water trace amounts of sodium on-line computing model and its on-line monitoring method and device |
| CN111678851A (en) * | 2020-05-08 | 2020-09-18 | 大亚湾核电运营管理有限责任公司 | Nuclear power plant filter performance detection system |
| CN215218555U (en) * | 2020-09-29 | 2021-12-17 | 中核核电运行管理有限公司 | Sodium flame method detecting system |
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