CN117517486A - Test device for evaluating methyl iodide absorption liquid performance - Google Patents
Test device for evaluating methyl iodide absorption liquid performance Download PDFInfo
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- CN117517486A CN117517486A CN202311137523.6A CN202311137523A CN117517486A CN 117517486 A CN117517486 A CN 117517486A CN 202311137523 A CN202311137523 A CN 202311137523A CN 117517486 A CN117517486 A CN 117517486A
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- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 87
- 239000007788 liquid Substances 0.000 title claims abstract description 85
- 238000012360 testing method Methods 0.000 title claims abstract description 73
- 238000000926 separation method Methods 0.000 claims abstract description 30
- 239000012071 phase Substances 0.000 claims abstract description 12
- 239000007791 liquid phase Substances 0.000 claims abstract description 9
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 238000011156 evaluation Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 230000005264 electron capture Effects 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011358 absorbing material Substances 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000005191 phase separation Methods 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims 2
- 239000000243 solution Substances 0.000 claims 2
- 239000007789 gas Substances 0.000 description 86
- 238000005070 sampling Methods 0.000 description 18
- 238000001914 filtration Methods 0.000 description 7
- 238000004817 gas chromatography Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000002285 radioactive effect Effects 0.000 description 5
- 239000000941 radioactive substance Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000001685 thyroid gland Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/64—Electrical detectors
- G01N30/70—Electron capture detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N2030/022—Column chromatography characterised by the kind of separation mechanism
- G01N2030/025—Gas chromatography
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a test device for evaluating methyl iodide absorption liquid performance, which comprises an air source part, a test part, a vapor-liquid separation part and a sample acquisition analysis part, wherein the air source part is used for measuring the methyl iodide absorption liquid performance; the air source part is used for simulating complex working conditions corresponding to the severe accident state of the nuclear power station; the test part is an absorption liquid container; the gas-liquid separation part comprises two separation branches which are respectively used for separating gas phase and liquid phase of inlet gas and outlet gas of the test part; and the sample collection and analysis part collects the inlet air and the outlet air of the test part simultaneously, detects and determines the concentration of methyl iodide, and finally realizes the evaluation of the performance of the methyl iodide absorption liquid. The device has simple structure and convenient operation, can evaluate the performance of the methyl iodide absorption liquid under the dry and wet air flow states containing the methyl iodide and under different conditions of flow, temperature, pressure and initial concentration, and meets the requirements of different test conditions. The concentration of methyl iodide can reach 10 ‑2 ppb level and is provided with an exhaust gas treatment systemIs safe and environment-friendly.
Description
Technical Field
The invention relates to a test device for evaluating the performance of methyl iodide absorption liquid, and belongs to the technical field of nuclear environmental protection.
Background
When a serious accident occurs in the nuclear power station, the pressure in the containment vessel is increased to damage the shell, so that radioactive substances in the shell are released, and the surrounding environment and people are greatly harmed. The containment filter discharge system realizes pressure relief and filtering and purifying of radioactive substances through exhaust and filtering and purifying. Radioactive methyl iodide is a radioactive substance formed in a containment under severe accidents of a nuclear power plant, and is of special interest although the radioactive substance is low in content due to the fact that the radioactive substance is easy to volatilize, difficult to capture and easy to concentrate in thyroid glands of human bodies to cause lesions. Currently, the chemical absorption liquid of the containment filter discharge system has low efficiency for removing radioactive methyl iodide, so that development of a chemical absorption liquid having higher efficiency for removing radioactive methyl iodide is required.
The apparatus for evaluating the efficiency of removing radioactive methyl iodide is a test system capable of performing a performance test on radioactive methyl iodide. The patent 202110538431.3 discloses an experimental system for testing the performance of a methyl iodide adsorption material, which adopts an air compressor, a steam boiler and a methyl iodide supply device to simulate the conditions of high temperature, high pressure and high humidity in a severe accident state of a nuclear power station, however, the experimental section of the system is a solid adsorption bed and cannot be used for evaluating the performance of methyl iodide absorption liquid. The patent 202111677979.2 discloses a multifunctional composite measuring system for measuring the filtering efficiency of different equipment, which can measure the methyl iodide removing efficiency of different types of filtering devices; however, the measurement system cannot control the temperature of the filtering device, for example, cannot measure the influence of the temperature change of the absorption liquid on the methyl iodide removal performance; the measuring system has no tail gas purifying unit, and can release a large amount of harmful gas methyl iodide for long-time life evaluation, so that the environment is polluted; the system controls the temperature of each path of air source respectively, then mixes, does not control the temperature and the pressure of the mixed air uniformly, and possibly causes the temperature and the pressure fluctuation of the mixed air sources to influence the test result; in addition, the sampling pipeline is shared by sampling before and after methyl iodide filtration, synchronous sampling cannot be achieved, and accuracy of test results can be affected. Therefore, it is important to design a test system which is simple and convenient to operate, accurate to detect and capable of evaluating the performance of the methyl iodide absorption liquid under the condition of meeting the complex working condition of the severe accident state of the nuclear power station.
Disclosure of Invention
The invention aims to provide a test device for evaluating the performance of methyl iodide absorption liquid, which is required to evaluate the performance of methyl iodide absorption liquid under the complex working condition of a severe accident state of a nuclear power station, and has the advantages of high detection sensitivity, accurate detection result, convenient operation, safety and environmental protection.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
the test device for evaluating the performance of the methyl iodide absorption liquid comprises an air source part, a test part, a vapor-liquid separation part and a sample collection analysis part;
the gas source part is used for providing methyl iodide mixed gas for the test part and simulating complex working conditions corresponding to the severe accident state of the nuclear power station;
the test part consists of an absorption liquid container, and the absorption liquid container is used for containing methyl iodide absorption liquid to be tested;
the gas-liquid separation part comprises two separation branches, and the first branch is used for separating gas phase and liquid phase of the mixed gas before entering the test part; the second branch is used for separating gas phase from liquid phase of the mixed gas absorbed by the test part;
the sample collecting and analyzing part collects the analyzable sample gas provided by the two separation branches at the same time, checks the proportion relation between water vapor and air in the mixed gas, detects and determines the concentration of methyl iodide, and finally realizes the evaluation of the performance of the methyl iodide absorption liquid.
Further, the air source part comprises a steam boiler, an air compressor, a methyl iodide bundling steel cylinder and a gas mixing chamber, and the combination requirements of steam, air and methyl iodide under various complex working conditions are realized by respectively controlling the gas flow and the pressure of the steam boiler, the air compressor and the methyl iodide bundling steel cylinder entering the gas mixing chamber.
Further, the two separation branches of the gas-liquid separation part have the same structure and sequentially comprise a condenser for condensation and a separator for gas phase and liquid phase separation.
Further, the tail ends of the two separation branches of the gas-liquid separation part are provided with a gas washing absorption tower for removing residual methyl iodide in the gas flow.
Further, the absorbing material in the gas washing absorbing tower is activated carbon, modified activated carbon, zeolite, silver-loaded zeolite and soluble silver salt solution.
Further, the sample collection analysis portion is a gas chromatograph.
Further, the detector used for the gas chromatography is an electron capture detector ECD, and the sensitivity of the detector to methyl iodide reaches 10 -2 ppb level.
Further, the absorption liquid container comprises an inlet pipeline, the inlet pipeline extends into the bottom of the absorption liquid container, a horn-shaped porous nozzle is arranged at the outlet of the inlet pipeline and used for uniformly releasing outlet airflow, and the pressure of the absorption liquid container is displayed by a pressure gauge.
Furthermore, the temperature control system is attached to the gas mixing chamber and the absorption liquid container, and the pressure of the two separation branches is controlled by the back pressure valve respectively.
The methyl iodide mixed gas prepared according to the test requirement is connected with a test part through a three-way valve S2, when an air outlet pipeline of the air mixing chamber is communicated with a condenser in a first branch, the air path pressure is regulated through a second back pressure valve 18, the condenser and a separator realize the gas-liquid separation of water vapor and air in the first branch, a gas phase part is metered through a flowmeter M4 and sampled at an inlet sampling port, the concentration of the methyl iodide inlet is determined by detecting sample gas through gas chromatography, and the water vapor content of the mixed gas is determined by metering a liquid phase part of the separator; when the air flow composition, temperature and pressure of the air mixing chamber meet the test requirements, the three-way valve S2 is regulated to enable the air outlet pipeline of the air mixing chamber to be communicated with the absorption liquid container, and the test is started.
The inlet pipeline of the absorption liquid container extends into the bottom of the absorption liquid container, and the outlet of the inlet pipeline is provided with a horn-shaped porous nozzle for uniform release of outlet airflow. The pressure of the absorption liquid container is displayed by a pressure gauge, and the pressure of the test system is controlled by a back pressure valve.
When the test is carried out, a valve is opened, a certain amount of methyl iodide mixed gas is introduced into a condenser in a first branch, gas-liquid separation is realized by a separator, a gas phase part is metered by a flowmeter M4 and is sampled at an inlet sampling port, and the concentration of a methyl iodide inlet is determined by detecting sample gas through gas chromatography; the reacted mixed gas passes through a condenser in the second branch, the separator realizes gas-liquid separation, the gas phase part is metered by a flowmeter M5 and sampled at an inlet sampling port, and the concentration of the methyl iodide outlet is determined by detecting the sample gas through gas chromatography; calculating the methyl iodide removal efficiency through the detected inlet and outlet methyl iodide concentration, thereby evaluating the methyl iodide removal performance of the absorption liquid; the inlet sampling action and the outlet sampling action are completed simultaneously, so that the influence of air flow fluctuation on the methyl iodide concentration is reduced, and the accuracy of the test is improved; the detector in gas chromatography is an Electron Capture Detector (ECD). The sensitivity to methyl iodide detection is high and can reach 10 -2 ppb level.
Residual methyl iodide in the air flow is removed from the tail gas of the two branches of the test flow through a gas washing absorption tower, and the absorption materials can be modified activated carbon, silver-loaded adsorbents, soluble silver salt solution and other common methyl iodide absorption materials, so that the tail gas after passing through the absorption tower is directly discharged, and the method is safe and environment-friendly.
The beneficial effects are that:
1. the invention provides a test device for evaluating the performance of methyl iodide absorption liquid, which adopts an independent air supply mode for three air sources of steam, air and methyl iodide, so that air sources with different components can be conveniently prepared according to different test requirements;
2. the air source gas is uniformly mixed in the air mixing chamber, and the temperature and the pressure of the air mixing chamber are controlled through the temperature control system of the air mixing chamber, so that stable air flow meeting test conditions is conveniently provided for a test flow;
3. the three-way valve S2 is used for distributing gas in the branch, so that the influence of air flow on the performance of the absorption liquid in the initial working condition adjustment process of the test is fast, convenient and reduced;
4. by controlling the temperature of the absorption liquid in the absorption liquid container, the methyl iodide removal efficiency under different absorption liquid temperature conditions can be inspected, and the absorption performance of the absorption liquid can be more comprehensively known;
5. the inlet sampling port and the outlet sampling port synchronously sample, so that the influence of the fluctuation of the mixed air flow on the test result can be effectively reduced;
6. the tail ends of the branch and the test pipeline are provided with a gas washing absorption tower, so that residual methyl iodide in the tail gas can be effectively purified, and the tail gas is safe and environment-friendly;
7. the detector used in gas chromatography in the sample collecting and analyzing part is Electron Capture Detector (ECD), and methyl iodide concentration can reach 10 -2 ppb level.
Description of the drawings:
FIG. 1 is a schematic diagram of a test apparatus according to the present invention. The device comprises a 1-steam boiler, a 2-air compressor, a 3-methyl iodide bundling steel bottle, a 4-gas mixing chamber, a 5-gas mixing chamber temperature control system, a 6-absorption liquid container, a 7-absorption liquid container temperature control system, an 8-first condenser, a 9-first separator, a 10-inlet sampling port, an 11-first gas washing absorption tower, a 12-second back pressure valve, an 18-first back pressure valve, a 13-second condenser, a 14-second separator, a 15-outlet sampling port, a 16-second gas washing absorption tower, a 17-gas chromatograph and P1-P5: pressure gauge, T1-T2: temperature display, M1-M5: flowmeter, S1-S2: three-way valve, F1-F4: and a stop valve.
The specific embodiment is as follows:
the present invention will now be described more fully hereinafter with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
As shown in FIG. 1, a test device for evaluating the performance of methyl iodide absorption liquid consists of an air source part, a test part, a gas-liquid separation part, a tail gas treatment part and a sample collection treatment part. The air source part consists of a steam boiler 1, an air compressor 2, a methyl iodide bundling steel bottle 3 and a gas mixing chamber 4; the test part is an absorption liquid container 6 filled with methyl iodide absorption liquid; the gas-liquid separation part consists of a first condenser 8, a second condenser 13, a first steam-water separator 9 and a second steam-water separator 14, the tail gas treatment part consists of a first gas washing absorption tower 11 and a second gas washing absorption tower 16, and the sample collection and analysis part is a gas chromatograph 17. The complex working condition for simulating the severe accident state of the nuclear power station is provided by the gas source part, the gas-liquid separation part realizes the separation of gas phase and liquid phase in the mixed gas so as to provide analyzable sample gas for gas chromatography, and the tail gas treatment part realizes environmental protection.
The gas mixing chamber 4 is provided with a gas mixing chamber temperature control system 5, the absorption liquid container 6 is provided with an absorption liquid container temperature control system 7, the first backpressure valve 18 controls the pressure of the first separation branch, and the second backpressure valve 12 controls the pressure of the second separation branch;
the steam boiler 1 heats deionized water to provide high-temperature and high-pressure steam for the test device; the air compressor 2 provides air for the test device, and the methyl iodide bundling steel cylinder 3 is internally provided with high-concentration mixed gas of methyl iodide and nitrogen to provide a methyl iodide gas source for the test device. As shown in fig. 1, three gas source gas flows and pressures are controlled by valves F1, F2 and F3, gas flows are measured by flow meters M1, M2 and M3, and gas pressures are measured by pressure gauges P1, P2 and P3. The methyl iodide bundling steel cylinder 3 is connected with the flowmeter M3 through the three-way valve S1, the three-way valve S1 is used for stabilizing methyl iodide air flow when the methyl iodide bundling steel cylinder is replaced, high-concentration mixed gas of methyl iodide and nitrogen is accurately prepared in the steel cylinder, and a continuous and stable methyl iodide air source is provided for a test flow through replacing the steel cylinder.
The air mixing chamber 4 is used for uniformly mixing different air flows, when a wet air source is adopted, uniformly mixing water vapor, methyl iodide and air, and when a dry air source is adopted, uniformly mixing the methyl iodide and the air; the flow and the pressure of different air sources are regulated and controlled through a stop valve and a flowmeter, so that the composition and the pressure of the air in the air mixing chamber 4 meet the test requirements; heating to a required test temperature through a temperature control system 5, and measuring the pressure of the gas mixing chamber by a pressure gauge P4; the three-way valve S2 is used for preparing and stabilizing the test air flow (namely mixed gas) before the test; the absorption liquid container 6 is used for filling absorption liquid to be detected, a stainless steel tank with a large pipe diameter (the pipe diameter is larger than 200 mm) and a high length-diameter ratio (more than 5) is adopted to adapt to test conditions of high temperature, high pressure and high humidity, the temperature of the absorption liquid is controlled by the temperature control system 7, and the gas phase pressure in the absorption liquid container 6 is measured by the pressure gauge P5; the first back pressure valve 18 is used for adjusting the flow and pressure of the mixed gas before entering the test part, the second back pressure valve 12 is used for adjusting the flow and pressure of the mixed gas absorbed by the test part, the first condenser 8 and the second condenser 13 are used for condensing steam in two branch gas flows and are separated by the first separator 9 and the second separator 14 respectively, the flow of the condensed gas flows in the first branch and the second branch are measured by the first flowmeter M4 and the second flowmeter M5 respectively, and the condensed gas flows are purified by the first scrubber absorber 11 and the second scrubber absorber 16 respectively and then are emptied.
The whole test procedure is as follows:
before the test, checking whether each instrument for the test runs normally, and when the test is carried out, the first condenser 8, the second condenser 13, the first scrubbing absorption tower 11, the second scrubbing absorption tower 16 and the gas chromatograph 17 are all in a standby state, adding the absorption liquid to be tested into the absorption liquid container 6, and adjusting the temperature control system of the absorption liquid container 6 to enable the temperature of the absorption liquid to reach the test temperature. The three-way valve S2 is connected with the first condenser 8 by pumping the gas source part, the required gas source is pumped into the gas mixing chamber 4 according to the gas source component requirement, and the flow and pressure of each gas source, the temperature and pressure of the gas mixing chamber 4 and the back pressure valve 18 are regulated to enable the gas parameter at the outlet of the gas mixing chamber 4 to meet the test requirement; the three-way valve S2 is connected with the absorption liquid container 6, the back pressure valve 12 is regulated to enable the system pressure to reach the specified pressure, in order to prevent air flow fluctuation in the test process, in the data acquisition process, the valve F4 is regulated, air flow samples of the inlet sampling port 10 and the outlet sampling port 15 are simultaneously acquired, the methyl iodide concentration is analyzed in the gas chromatograph, the absorption efficiency of the absorption liquid to the methyl iodide is obtained through calculation, and the absorption efficiency calculation formula is as follows:
wherein:
eta-filtration efficiency
C I Inlet sampling port gas flow sample methyl iodide concentration value mg/m 3
C II -outlet sampling port gas flow sample methyl iodide concentration value mg/m 3
After the liquid absorption test is finished, the steam boiler, the methyl iodide gas source, the absorption liquid temperature control system, the gas mixing chamber temperature control system and the condenser cooling water are closed, the three-way valve S2 and the valve F4 are regulated, the residual methyl iodide gas in the branch and the test pipeline is continuously purged by the air compressor, and the gas chromatograph and the air compressor are closed when no methyl iodide is detected by the inlet sampling port and the outlet sampling port.
Claims (9)
1. The test device for evaluating the performance of the methyl iodide absorption liquid is characterized by comprising an air source part, a test part, a vapor-liquid separation part and a sample collection analysis part;
the gas source part is used for providing methyl iodide mixed gas for the test part and simulating complex working conditions corresponding to the severe accident state of the nuclear power station;
the test part consists of an absorption liquid container, and the absorption liquid container is used for containing methyl iodide absorption liquid to be tested;
the gas-liquid separation part comprises two separation branches, and the first branch is used for separating gas phase and liquid phase of the mixed gas before entering the test part; the second branch is used for separating gas phase from liquid phase of the mixed gas absorbed by the test part;
the sample collecting and analyzing part collects the analyzable sample gas provided by the two separation branches at the same time, checks the proportion relation between water vapor and air in the mixed gas, detects and determines the concentration of methyl iodide, and finally realizes the evaluation of the performance of the methyl iodide absorption liquid.
2. The test device for evaluating the performance of a methyl iodide absorption liquid according to claim 1, wherein: the air source part comprises a steam boiler (1), an air compressor (2), a methyl iodide bundling steel cylinder (3) and a gas mixing chamber (4), and the combination requirements of steam, air and methyl iodide under various complex working conditions are realized by respectively controlling the gas flow and the pressure of the steam boiler (1), the air compressor (2) and the methyl iodide bundling steel cylinder (3) entering the gas mixing chamber (4).
3. The test device for evaluating the performance of a methyl iodide absorption liquid according to claim 1, wherein: the two separation branches of the gas-liquid separation part have the same structure and sequentially comprise a condenser for condensation and a separator for gas phase and liquid phase separation.
4. A test device for evaluating the performance of a methyl iodide absorption solution as claimed in claim 3, wherein: and the tail ends of the two separation branches of the gas-liquid separation part are provided with a gas washing absorption tower for removing residual methyl iodide in the gas flow.
5. The test device for evaluating the performance of a methyl iodide absorption solution according to claim 4, wherein: the absorbing material in the gas washing absorbing tower is active carbon, modified active carbon, zeolite, silver-loaded zeolite, and soluble silver salt solution.
6. The test device for evaluating the performance of a methyl iodide absorption liquid according to claim 1, wherein: the sample collection analysis portion is a gas chromatograph (17).
7. A use according to claim 6The test device for evaluating the performance of the methyl iodide absorption liquid is characterized in that: the detector used by the gas chromatograph (17) is an electron capture detector ECD, and the sensitivity of the detector to methyl iodide reaches 10 -2 ppb level.
8. The test device for evaluating the performance of a methyl iodide absorption liquid according to claim 1, wherein: the absorption liquid container (6) comprises an inlet pipeline, the inlet pipeline stretches into the bottom of the absorption liquid container (6), a horn-shaped porous nozzle is arranged at the outlet of the inlet pipeline and is used for uniformly releasing outlet airflow, and the pressure of the absorption liquid container (6) is displayed by a pressure gauge.
9. A test device for evaluating methyl iodide absorption liquid performance as claimed in claim 2 or 3 or 6 or 8, wherein: the temperature control system is attached to the gas mixing chamber (4) and the absorption liquid container (6), and the pressure of the two separation branches is controlled by the back pressure valve respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311137523.6A CN117517486A (en) | 2023-09-05 | 2023-09-05 | Test device for evaluating methyl iodide absorption liquid performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311137523.6A CN117517486A (en) | 2023-09-05 | 2023-09-05 | Test device for evaluating methyl iodide absorption liquid performance |
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| Publication Number | Publication Date |
|---|---|
| CN117517486A true CN117517486A (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311137523.6A Pending CN117517486A (en) | 2023-09-05 | 2023-09-05 | Test device for evaluating methyl iodide absorption liquid performance |
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| Country | Link |
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| CN (1) | CN117517486A (en) |
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- 2023-09-05 CN CN202311137523.6A patent/CN117517486A/en active Pending
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