CN113984855B - Method and device for measuring concentration of target gas in radioactive waste gas - Google Patents
Method and device for measuring concentration of target gas in radioactive waste gas Download PDFInfo
- Publication number
- CN113984855B CN113984855B CN202111232338.6A CN202111232338A CN113984855B CN 113984855 B CN113984855 B CN 113984855B CN 202111232338 A CN202111232338 A CN 202111232338A CN 113984855 B CN113984855 B CN 113984855B
- Authority
- CN
- China
- Prior art keywords
- measuring
- waste gas
- concentration
- radioactive waste
- dissolved
- 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.)
- Active
Links
- 239000007789 gas Substances 0.000 title claims abstract description 151
- 239000002901 radioactive waste Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000001257 hydrogen Substances 0.000 claims abstract description 108
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 108
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 239000001301 oxygen Substances 0.000 claims abstract description 94
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 94
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 92
- 229920006395 saturated elastomer Polymers 0.000 claims description 27
- 210000001503 joint Anatomy 0.000 claims description 19
- 238000004458 analytical method Methods 0.000 claims description 7
- 238000002795 fluorescence method Methods 0.000 claims description 7
- 150000002431 hydrogen Chemical class 0.000 claims description 7
- 238000004090 dissolution Methods 0.000 claims description 2
- 239000002912 waste gas Substances 0.000 abstract description 16
- 238000013461 design Methods 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 abstract description 12
- 230000002285 radioactive effect Effects 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000007084 catalytic combustion reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 230000005298 paramagnetic effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- -1 oxygen ions Chemical class 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- 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
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to a method for measuring the concentration of target gas in radioactive waste gas, which adopts a brand new design thought, is based on solving dissolved hydrogen and dissolved oxygen in the waste gas, and combines the pressure detection result and the temperature detection result of the waste gas to carry out comprehensive data processing application, so that the concentration of hydrogen and the concentration of oxygen in the waste gas can be obtained efficiently and accurately; meanwhile, an electrochemical dissolved hydrogen analyzer (7), a fluorescence dissolved oxygen analyzer (10), a pressure gauge (12) and a thermometer (13) are used for obtaining the construction of a device for realizing the method for measuring the concentration of the target gas in the radioactive waste gas, the whole design greatly simplifies the device, so that the manufacturing cost and the maintenance cost are greatly reduced, interference factors in practical application are few, the measurement precision is high, the stability of the device is effectively improved, the maintenance working time is greatly reduced, and the radiation quantity experienced by workers in a radioactive environment when the workers are engaged in maintenance work is reduced.
Description
Technical Field
The invention relates to a method and a device for measuring concentration of target gas in radioactive waste gas, and belongs to the technical field of radioactive gas detection.
Background
The nuclear power plant exhaust system is used to collect, process and discharge radioactive exhaust gases containing hydrogen and oxygen to keep the off-site radioactive emissions within acceptable limits. The gas components in the exhaust gas include hydrogen, oxygen, nitrogen, water vapor, and radioactive inert gases such as xenon, krypton, etc., and in order to prevent the combustion and explosion of hydrogen, it is necessary to measure the hydrogen concentration and the oxygen concentration in the exhaust gas.
Various methods for measuring the hydrogen concentration in the prior art include gas chromatography, thermal conduction, catalytic combustion, solid-state thin-film hydrogen sensors and the like; wherein, the gas chromatograph is a relatively expensive device, and the maintenance and operation techniques are complex and high in cost; the thermal conductivity meter has large error because of the complex components of the actual background gas; the catalytic combustion and solid-state thin film hydrogen sensor have small measuring range and cannot meet the actual requirements.
In addition, there are various methods for measuring oxygen concentration in the prior art, including gas chromatography, paramagnetic, fuel cell, zirconia, etc.; wherein, the maintenance and operation technology of the gas chromatograph is complex and high in cost; the paramagnetic instruments have high requirements on the environment and cannot be vibrated; the service life of the fuel cell meter sensor is short; the temperature of the exhaust gas is not in the proper operating temperature range of the zirconia meter.
Disclosure of Invention
In order to solve the technical problems, the invention designs a method for measuring the concentration of target gas in radioactive waste gas, adopts a brand new design thought, applies dissolved hydrogen data and dissolved oxygen data, combines the pressure and the temperature of the waste gas, efficiently realizes the measurement of the concentration of hydrogen and the concentration of oxygen in the waste gas, and has low practical application cost.
The invention adopts the following technical scheme for solving the technical problems: the invention designs a method for measuring the concentration of target gas in radioactive waste gas, which comprises the steps of firstly measuring the radioactive waste gas to obtain the temperature value t of the radioactive waste gas Measuring Pressure value p Measuring And a dissolved target gas concentration value corresponding to the target gas in the radioactive waste gas; then according to the temperature value t Measuring Pressure value p Measuring And calculating the concentration value of the dissolved target gas to obtain the concentration of the target gas in the radioactive waste gas.
As a preferred technical scheme of the invention: the target gas is hydrogen, namely the dissolved hydrogen concentration DH corresponding to the hydrogen in the obtained radioactive waste gas Measuring Combined with the temperature value t of the radioactive waste gas Measuring Pressure value p Measuring The method comprises the following steps of A to C, wherein the concentration of hydrogen in radioactive waste gas is obtained;
step A, calculating to obtain a temperature value t by interpolation according to a temperature-saturated dissolved hydrogen comparison table Measuring Corresponding saturated dissolved hydrogen concentration DH Meter with a meter body Then enter step B;
step B, according to the following formula:
p W ＝1.013*exp{1*10-[4*10 3 +2*10 5 /(273.15+t measuring )]/(273.15+t Measuring )}
Calculating to obtain saturated vapor pressure p corresponding to the vapor W Then enter step C;
step C, according to the following formula:
calculating to obtain the concentration C of hydrogen in radioactive waste gas H The hydrogen concentration in the radioactive waste gas is obtained.
As a preferred embodiment of the present invention, the step a includes the following steps A1 to A2;
step A1. Obtaining the temperature value t according to a temperature-saturated dissolved hydrogen comparison table Measuring Two adjacent temperature values t 1 、t 2 And a temperature value t 1 、t 2 Respectively corresponding saturated dissolved hydrogen concentration DH 1 、DH 2 Then enter step A2; wherein t is 1 ＜t 2 ；
Step A2. The following formula is adopted:
calculating to obtain a temperature value t Measuring Corresponding saturated dissolved hydrogen concentration DH Meter with a meter body Step B is then entered.
As a preferred technical scheme of the invention: dissolved hydrogen concentration DH corresponding to hydrogen in the radioactive waste gas Measuring Obtained by electrochemical dissolution hydrogen analysis.
As a preferred technical scheme of the invention: the target gas is oxygen, namely the dissolved oxygen concentration value DO corresponding to the oxygen in the obtained radioactive waste gas Measuring Combined with the temperature value t of the radioactive waste gas Measuring Pressure value p Measuring The method comprises the following steps of I to III, wherein the oxygen concentration in the radioactive waste gas is obtained;
step I, according to the following formula:
DO meter with a meter body ＝1.013*exp{2*10-[5*10 3 -1*10 6 /(273.15+t Measuring )]/(273.15+t Measuring )}
Calculating to obtain a temperature value t Measuring Corresponding saturated dissolved oxygen concentration DO Meter with a meter body Then enter step II;
step II, according to the following formula:
p W ＝1.013*exp{1*10-[4*10 3 +2*10 5 /(273.15+t measuring )]/(273.15+t Measuring )}
Calculating to obtain saturated vapor pressure p corresponding to the vapor W Then step III is entered;
step III. According to the following formula
Calculating to obtain the oxygen concentration C in the radioactive waste gas o The oxygen concentration in the radioactive waste gas is obtained.
As a preferred technical scheme of the invention: the dissolved oxygen concentration value DO corresponding to the oxygen in the radioactive waste gas is obtained Measuring Obtained by a fluorescence method dissolved oxygen analysis method.
In order to solve the technical problems, the invention designs a device for realizing the method for measuring the concentration of the target gas in the radioactive waste gas, adopts a brand new design thought, adopts an electrochemical dissolved hydrogen analyzer and a fluorescence dissolved oxygen analyzer, combines measuring devices for the pressure and the temperature of the waste gas, efficiently realizes the measurement of the concentration of hydrogen and the concentration of oxygen in the waste gas, and has low practical application cost.
The invention adopts the following technical scheme for solving the technical problems: the invention designs a device for realizing a target gas concentration measurement method in radioactive waste gas, which comprises a first needle valve, a second needle valve, a control module, a pressure gauge, a thermometer, an electrochemical dissolved hydrogen analyzer and a fluorescence dissolved oxygen analyzer, wherein the pressure gauge and the thermometer are respectively connected with the control module;
the radioactive waste gas is respectively abutted to one end of the first needle valve and one end of the second needle valve through pipelines; the other end of the first needle valve is in butt joint with the input end of the electrochemical dissolved hydrogen analyzer, and the other end of the second needle valve is in butt joint with the input end of the fluorescence dissolved oxygen analyzer; the output end of the electrochemical dissolved hydrogen analyzer and the output end of the fluorescence dissolved oxygen analyzer are converged through a pipeline and output through a pressure gauge and a thermometer through the pipeline;
the control module is used for receiving the pressure gaugePressure value p Measuring Temperature value t of thermometer Measuring Dissolved hydrogen concentration value DH corresponding to hydrogen in radioactive waste gas from electrochemical dissolved hydrogen analyzer Measuring Dissolved oxygen concentration value DO corresponding to oxygen in radioactive waste gas from fluorescence method dissolved oxygen analyzer Measuring And the method for measuring the concentration of hydrogen in the radioactive waste gas and the method for measuring the concentration of oxygen are respectively executed, so that the calculation and the acquisition of the concentration of hydrogen and the calculation and the acquisition of the concentration of oxygen in the radioactive waste gas are realized.
As a preferred technical scheme of the invention: the radioactive waste gas is sent into the input end of the first three-way valve through a pipeline, two output ends of the first three-way valve are respectively connected with the input end of the pressure regulator and the input end of the explosion-proof pump through pipelines, the output end of the pressure regulator and the output end of the explosion-proof pump are respectively connected with the two input ends of the second three-way valve through pipelines, and the output end of the second three-way valve is respectively connected with one end of the first needle valve and one end of the second needle valve through pipelines.
As a preferred technical scheme of the invention: the system also comprises a first flowmeter and a second flowmeter; the output end of the electrochemical dissolved hydrogen analyzer is connected with one end of the first flowmeter through a pipeline, the output end of the fluorescence dissolved oxygen analyzer is connected with one end of the second flowmeter through a pipeline, and the other end of the first flowmeter and the other end of the second flowmeter are converged through a pipeline and output through the pipeline after passing through the pressure gauge and the thermometer.
As a preferred technical scheme of the invention: the filter is characterized by further comprising a filter, wherein the output end of the second three-way valve is in butt joint with the input end of the filter through a pipeline, and the output end of the filter is in butt joint with one end of the first needle valve and one end of the second needle valve respectively through pipelines.
Compared with the prior art, the method and the device for measuring the concentration of the target gas in the radioactive waste gas have the following technical effects:
the method for measuring the target gas concentration in the radioactive waste gas adopts a brand new design thought, is based on solving the dissolved hydrogen and the dissolved oxygen in the waste gas, combines the pressure detection result and the temperature detection result of the waste gas, and can be used for comprehensive data processing application, so that the hydrogen concentration and the oxygen concentration in the waste gas can be obtained efficiently and accurately; meanwhile, an electrochemical dissolved hydrogen analyzer, a fluorescence method dissolved oxygen analyzer, a pressure gauge and a thermometer are used for obtaining the construction of a device for realizing the method for measuring the concentration of the target gas in the radioactive waste gas, the whole design greatly simplifies the device, so that the manufacturing cost and the maintenance cost are greatly reduced, interference factors in practical application are few, the measurement precision is high, the stability of the device is effectively improved, the maintenance working time is greatly reduced, and the radiation quantity of workers in a radioactive environment during the maintenance work is reduced.
Drawings
Fig. 1 is a schematic view of an apparatus for measuring a concentration of a target gas in a radioactive exhaust gas according to the present invention.
Wherein, 1, a first three-way valve, 2, a pressure regulator, 3, an explosion-proof pump, 4, a second three-way valve, 5, a filter, 6, a first needle valve, 7, an electrochemical dissolved hydrogen analyzer, the system comprises a first flowmeter, a second needle valve, a fluorescence dissolved oxygen analyzer, a second flowmeter, a pressure gauge, a thermometer and a control module.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
The invention designs a method for measuring the concentration of target gas in radioactive waste gas, which comprises the steps of firstly measuring the radioactive waste gas to obtain the temperature value t of the radioactive waste gas Measuring Pressure value p Measuring And a dissolved target gas concentration value corresponding to the target gas in the radioactive waste gas; then according to the temperature value t Measuring Pressure value p Measuring And calculating the concentration value of the dissolved target gas to obtain the concentration of the target gas in the radioactive waste gas.
With respect to the above-described achievement of the target gas concentration in the radioactive exhaust gas, in a specific practical application, such as designing the target gasThe hydrogen is hydrogen and oxygen, wherein the hydrogen is obtained by electrochemical dissolved hydrogen analysis method to obtain the dissolved hydrogen concentration DH corresponding to the hydrogen in the radioactive waste gas Measuring In combination with the temperature value t of the radioactive waste gas Measuring Pressure value p Measuring The method specifically comprises the following steps A to C, so as to obtain the concentration of hydrogen in the radioactive waste gas.
Step A, calculating to obtain a temperature value t by interpolation according to a temperature-saturated dissolved hydrogen comparison table Measuring Corresponding saturated dissolved hydrogen concentration DH Meter with a meter body Step B is then entered.
In practical applications, the step a specifically executes the following steps A1 to A2.
Step A1. The temperature value t is obtained according to a temperature-saturated dissolved hydrogen comparison table, as shown in Table 1 below Measuring Two adjacent temperature values t 1 、t 2 And a temperature value t 1 、t 2 Respectively corresponding saturated dissolved hydrogen concentration DH 1 、DH 2 Then enter step A2; wherein t is 1 ＜t 2 。
TABLE 1
| t℃ | DH μg/L | t℃ | DH μg/L | t℃ | DH μg/L | t℃ | DH μg/L |
| 0 | 1922 | 18 | 1627 | 36 | 1406 | 54 | 1229 |
| 1 | 1904 | 19 | 1613 | 37 | 1396 | 55 | 1218 |
| 2 | 1886 | 20 | 1599 | 38 | 1386 | 56 | 1206 |
| 3 | 1868 | 21 | 1584 | 39 | 1377 | 57 | 1194 |
| 4 | 1851 | 22 | 1569 | 40 | 1367 | 58 | 1182 |
| 5 | 1833 | 23 | 1555 | 41 | 1358 | 59 | 1169 |
| 6 | 1816 | 24 | 1541 | 42 | 1349 | 60 | 1156 |
| 7 | 1799 | 25 | 1528 | 43 | 1339 | 61 | 1142 |
| 8 | 1782 | 26 | 1515 | 44 | 1330 | 62 | 1128 |
| 9 | 1766 | 27 | 1503 | 45 | 1320 | 63 | 1114 |
| 10 | 1749 | 28 | 1491 | 46 | 1311 | 64 | 1099 |
| 11 | 1733 | 29 | 1480 | 47 | 1301 | 65 | 1083 |
| 12 | 1717 | 30 | 1468 | 48 | 1291 | 66 | 1067 |
| 13 | 1701 | 31 | 1457 | 49 | 1281 | 67 | 1050 |
| 14 | 1686 | 32 | 1446 | 50 | 1271 | 68 | 1033 |
| 15 | 1671 | 33 | 1436 | 51 | 1261 | 69 | 1015 |
| 16 | 1656 | 34 | 1426 | 52 | 1251 | 70 | 996 |
| 17 | 1641 | 35 | 1416 | 53 | 1240 | 71 | 976 |
Step A2. The following formula is adopted:
calculating to obtain a temperature value t Measuring Corresponding saturated dissolved hydrogen concentration DH Meter with a meter body Step B is then entered.
Step B, according to the following formula:
p W ＝1.013*exp{1*10-[4*10 3 +2*10 5 /(273.15+t measuring )]/(273.15+t Measuring )}
Calculating to obtain saturated vapor pressure p corresponding to the vapor W Then step C is entered.
Step C, according to the following formula:
calculating to obtain the concentration C of hydrogen in radioactive waste gas H The hydrogen concentration in the radioactive waste gas is obtained.
For oxygen as target gas, namely by fluorescence method dissolved oxygen analysis method, the dissolved oxygen concentration DO corresponding to oxygen in radioactive waste gas is obtained Measuring And combined with radiationTemperature value t of the exhaust gas Measuring Pressure value p Measuring The method specifically comprises the following steps I to III, so as to obtain the oxygen concentration in the radioactive waste gas.
Step I, according to the following formula:
DO meter with a meter body ＝1.013*exp{2*10-[5*10 3 -1*10 6 /(273.15+t Measuring )]/(273.15+t Measuring )}
Calculating to obtain a temperature value t Measuring Corresponding saturated dissolved oxygen concentration DO Meter with a meter body Step II is then entered.
Step II, according to the following formula:
p W ＝1.013*exp{1*10-[4*10 3 +2*10 5 /(273.15+t measuring )]/(273.15+t measurement) }
Calculating to obtain saturated vapor pressure p corresponding to the vapor W Step III is then entered.
Step III. According to the following formula
Calculating to obtain the oxygen concentration C in the radioactive waste gas o The oxygen concentration in the radioactive waste gas is obtained.
In practical application, the invention specifically designs a device for realizing the method, as shown in fig. 1, comprising a first needle valve 6, a second needle valve 9, a control module 14, a pressure gauge 12, a thermometer 13, an electrochemical dissolved hydrogen analyzer 7 for obtaining a dissolved hydrogen concentration value corresponding to hydrogen in the radioactive waste gas, and a fluorescence dissolved oxygen analyzer 10 for obtaining a dissolved oxygen concentration value corresponding to oxygen in the radioactive waste gas, wherein the pressure gauge 12, the thermometer 13 and the fluorescence dissolved oxygen analyzer are respectively connected with the control module 14.
Wherein the radioactive waste gas is respectively abutted to one end of the first needle valve 6 and one end of the second needle valve 9 through pipelines; the other end of the first needle valve 6 is in butt joint with the input end of the electrochemical dissolved hydrogen analyzer 7, and the other end of the second needle valve 9 is in butt joint with the input end of the fluorescence dissolved oxygen analyzer 10; the output end of the electrochemical dissolved hydrogen analyzer 7 and the output end of the fluorescence dissolved oxygen analyzer 10 are converged through a pipeline and output through the pipeline after passing through the pressure gauge 12 and the thermometer 13.
The control module 14 is configured to receive a pressure value p from the pressure gauge 12 Measuring Temperature value t of thermometer 13 Measuring Dissolved hydrogen concentration value DH corresponding to hydrogen in the radioactive exhaust gas from the electrochemical dissolved hydrogen analyzer 7 Measuring Dissolved oxygen concentration value DO corresponding to oxygen in radioactive waste gas from fluorescence dissolved oxygen analyzer 10 Measuring And the method for measuring the concentration of hydrogen in the radioactive waste gas and the method for measuring the concentration of oxygen are respectively executed, so that the calculation and the acquisition of the concentration of hydrogen and the calculation and the acquisition of the concentration of oxygen in the radioactive waste gas are realized.
The dissolved hydrogen analyzer comprises an electrochemical principle and a thermal conductivity principle, wherein the thermal conductivity principle is that the dissolved hydrogen analyzer needs nitrogen purging, and inert gases such as helium and the like possibly existing in waste gas can interfere with measurement; the electrochemical principle dissolved hydrogen analysis structure is simple, nitrogen is not needed, and no interference of inert gas exists, so that the electrochemical dissolved hydrogen analyzer is adopted in the invention.
The dissolved oxygen analyzer comprises a fluorescence method principle and an electrochemical principle, wherein the stability of the fluorescence method dissolved oxygen meter is higher than that of the electrochemical dissolved oxygen analyzer, and the maintenance quantity is smaller than that of the electrochemical dissolved oxygen analyzer.
Fluorescence oxygen-dissolving analyzers use fluorescence emitted from a luminophor made of a specific organic pigment material, which is quenched in the presence of oxygen, absorbs excitation light, and releases a portion of the absorbed energy by fluorescence emission, which, when oxygen is present, is directly transferred from the excited luminophor to oxygen ions, rather than being released by fluorescence emission, resulting in a decrease in the measurable fluorescence signal, which is detected to determine the oxygen-dissolving value.
Wherein, the concentration of dissolved oxygen and the fluorescence intensity accord with the Stern-Volmer equation:
F 0 /F＝1+K sv *DO
wherein F is 0 Fluorescence intensity in the absence of oxygen, fluorescence intensity in the presence of F-oxygen, DO-dissolved oxygen concentration, K sv -stem-Volmer constant.
Based on the device designed to realize the method for measuring the concentration of the target gas in the radioactive waste gas, as shown in fig. 1, the invention further designs a first three-way valve 1, a pressure regulator 2, an explosion-proof pump 3 and a second three-way valve 4, wherein the radioactive waste gas is sent into the input end of the first three-way valve 1 through a pipeline, the two output ends of the first three-way valve 1 are respectively connected with the input end of the pressure regulator 2 and the input end of the explosion-proof pump 3 through pipelines, the output end of the pressure regulator 2 and the output end of the explosion-proof pump 3 are respectively connected with the two input ends of the second three-way valve 4 through pipelines, and the output end of the second three-way valve 4 is respectively connected with one end of the first needle valve 6 and one end of the second needle valve 9 through pipelines.
In practical application, a filter 5, a first flowmeter 8 and a second flowmeter 11 are further added; the output end of the second three-way valve 4 is in butt joint with the input end of the filter 5 through a pipeline, and the output end of the filter 5 is in butt joint with one end of the first needle valve 6 and one end of the second needle valve 9 through a pipeline respectively; and the output end of the electrochemical dissolved hydrogen analyzer 7 is designed to be in butt joint with one end of the first flowmeter 8 through a pipeline, the output end of the fluorescence dissolved oxygen analyzer 10 is designed to be in butt joint with one end of the second flowmeter 11 through a pipeline, and the other end of the first flowmeter 8 and the other end of the second flowmeter 11 are converged through a pipeline and output after passing through the pressure gauge 12 and the thermometer 13 through the pipeline.
According to the scheme, in the process of measuring and obtaining the hydrogen concentration and the oxygen concentration in the waste gas, the hydrogen concentration and the oxygen concentration in the waste gas are obtained by calculating according to the scheme without directly using a meter for measuring the hydrogen concentration and the oxygen concentration and using a hydrogen dissolving analyzer and an oxygen dissolving analyzer for measuring the gas dissolved concentration in liquid.
In practical application, as shown in fig. 1, the radioactive waste gas enters the filter 5 through the first three-way valve 1, the pressure regulator 2 and the second three-way valve 4, and then the output end of the filter 5 is divided into two paths: one path sequentially passes through a first needle valve 6 and a dissolved hydrogen analyzer 7 and enters a first flowmeter 8; the other path sequentially passes through a second needle valve 9 and a dissolved hydrogen analyzer 10 and enters a second flowmeter 11; the output end of the second flowmeter 8 is combined with the output end of the second flowmeter 11 in two ways, and finally the second flowmeter is discharged after passing through the pressure gauge 12 and the thermometer 13.
In practical application, the pressure regulator 2, the first needle valve 6 and the second needle valve 9 are regulated, and the first flowmeter 8 and the second flowmeter 11 are observed, so that the dissolved hydrogen analyzer 7 and the dissolved hydrogen analyzer 10 obtain proper flow rates; when the inlet air pressure is high enough, the dissolved hydrogen analyzer 7 and the dissolved hydrogen analyzer 10 can obtain the flow of the exhaust gas required by measurement, and simultaneously, the output end of the first three-way valve 1 and the input end of the second three-way valve 4 are both turned to the pressure regulator 2, and the explosion-proof pump 3 is not started; when the intake pressure is not high enough, it cannot be guaranteed that the dissolved hydrogen analyzer 7 and the dissolved hydrogen analyzer 10 obtain the exhaust gas flow required for measurement, the output end of the first three-way valve 1 and the input end of the second three-way valve 4 both turn to the explosion-proof pump 3, and the explosion-proof pump 3 is started.
The method for measuring the target gas concentration in the radioactive waste gas is designed by the technical scheme, adopts a brand new design thought, is based on solving the dissolved hydrogen and the dissolved oxygen in the waste gas, combines the pressure detection result and the temperature detection result of the waste gas, and can be used for comprehensive data processing application, so that the hydrogen concentration and the oxygen concentration in the waste gas can be obtained efficiently and accurately; meanwhile, the electrochemical dissolved hydrogen analyzer 7, the fluorescence dissolved oxygen analyzer 10, the pressure gauge 12 and the thermometer 13 are used for obtaining the construction of a device for realizing the method for measuring the concentration of the target gas in the radioactive waste gas, the whole design greatly simplifies the device, so that the manufacturing cost and the maintenance cost are greatly reduced, interference factors in practical application are few, the measurement precision is high, the stability of the device is effectively improved, the maintenance working time is greatly reduced, and the radiation quantity suffered by workers in a radioactive environment when the workers are engaged in maintenance work is reduced.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (6)
1. A method for measuring the concentration of target gas in radioactive waste gas is characterized by comprising the following steps: firstly, measuring radioactive waste gas to obtain a temperature value t of the radioactive waste gas Measuring Pressure value p Measuring And a dissolved target gas concentration value corresponding to the target gas in the radioactive waste gas;
then according to the temperature value t Measuring Pressure value p Measuring And calculating a dissolved target gas concentration value to obtain a target gas concentration in the radioactive waste gas, wherein the saturated dissolved target gas concentration is calculated to obtain first, and then a saturated vapor pressure p corresponding to the vapor is calculated to obtain W Finally, according to the saturated dissolved target gas concentration, p W Calculating to obtain the concentration of the target gas in the radioactive waste gas by combining the concentration value of the dissolved target gas;
when the target gas is hydrogen, namely the dissolved hydrogen concentration DH corresponding to the hydrogen in the obtained radioactive waste gas Measuring Combined with the temperature value t of the radioactive waste gas Measuring Pressure value p Measuring The method comprises the following steps of A to C, wherein the concentration of hydrogen in radioactive waste gas is obtained;
step A, calculating to obtain a temperature value t by interpolation according to a temperature-saturated dissolved hydrogen comparison table Measuring Corresponding saturated dissolved hydrogen concentration DH Meter with a meter body Then enter step B;
the step A comprises the following steps A1 to A2;
step A1. Obtaining the temperature value t according to a temperature-saturated dissolved hydrogen comparison table Measuring Two adjacent temperature values t 1 、t 2 And a temperature value t 1 、t 2 Respectively corresponding saturated dissolvingHydrogen concentration DH 1 、DH 2 Then enter step A2; wherein t is 1 <t 2 ；
Step A2. The following formula is adopted:
calculating to obtain a temperature value t Measuring Corresponding saturated dissolved hydrogen concentration DH Meter with a meter body Then enter step B;
step B, according to the following formula:
p W ＝1.013*exp{1*10-[4*10 3 +2*10 5 /(273.15+t measuring )]/(273.15+t Measuring )}
Calculating to obtain saturated vapor pressure p corresponding to the vapor W Then enter step C;
step C, according to the following formula:
calculating to obtain the concentration C of hydrogen in radioactive waste gas H The hydrogen concentration in the radioactive waste gas is obtained;
when the target gas is oxygen, namely the dissolved oxygen concentration DO corresponding to the oxygen in the obtained radioactive waste gas Measuring Combined with the temperature value t of the radioactive waste gas Measuring Pressure value p Measuring The method comprises the following steps of I to III, wherein the oxygen concentration in the radioactive waste gas is obtained;
step I, according to the following formula:
DO meter with a meter body ＝1.013*exp{2*10-[5*10 3 -1*10 6 /(273.15+t Measuring )]/(273.15+t Measuring )}
Calculating to obtain a temperature value t Measuring Corresponding saturated dissolved oxygen concentration DO Meter with a meter body Then enter step II;
step II, according to the following formula:
p W ＝1.013*exp{1*10-[4*10 3 +2*10 5 /(273.15+t measuring )]/(273.15+t Measuring )}
Calculating to obtain saturated vapor pressure p corresponding to the vapor W Then step III is entered;
step III. According to the following formula
Calculating to obtain the oxygen concentration C in the radioactive waste gas o The oxygen concentration in the radioactive waste gas is obtained.
2. A method for measuring a target gas concentration in a radioactive waste gas according to claim 1, wherein: dissolved hydrogen concentration DH corresponding to hydrogen in the radioactive waste gas Measuring Obtained by electrochemical dissolution hydrogen analysis.
3. A method for measuring a target gas concentration in a radioactive waste gas according to claim 1, wherein: the dissolved oxygen concentration value DO corresponding to the oxygen in the radioactive waste gas is obtained Measuring Obtained by a fluorescence method dissolved oxygen analysis method.
4. An apparatus for carrying out the method for measuring the concentration of a target gas in a radioactive waste gas according to any one of claims 1 to 3, characterized in that: the device comprises a first needle valve (6), a second needle valve (9), a control module (14), a pressure gauge (12), a thermometer (13), an electrochemical dissolved hydrogen analyzer (7) and a fluorescence dissolved oxygen analyzer (10), wherein the pressure gauge (12), the thermometer (13) and the fluorescence dissolved oxygen analyzer are respectively connected with the control module (14), the electrochemical dissolved hydrogen analyzer is used for obtaining a dissolved hydrogen concentration value corresponding to hydrogen in radioactive waste gas, and the fluorescence dissolved oxygen analyzer is used for obtaining a dissolved oxygen concentration value corresponding to oxygen in the radioactive waste gas;
wherein the radioactive waste gas is respectively abutted with one end of the first needle valve (6) and one end of the second needle valve (9) through pipelines; the other end of the first needle valve (6) is in butt joint with the input end of the electrochemical dissolved hydrogen analyzer (7), and the other end of the second needle valve (9) is in butt joint with the input end of the fluorescence dissolved oxygen analyzer (10); the output end of the electrochemical dissolved hydrogen analyzer (7) and the output end of the fluorescence dissolved oxygen analyzer (10) are converged through a pipeline and output through a pressure gauge (12) and a thermometer (13) through the pipeline;
the control module (14) is used for receiving the pressure value p from the pressure gauge (12) Measuring Temperature value t of thermometer (13) Measuring And a dissolved hydrogen concentration value DH corresponding to hydrogen in the radioactive waste gas from the electrochemical dissolved hydrogen analyzer (7) Measuring Dissolved oxygen concentration value DO corresponding to oxygen in radioactive waste gas from fluorescence dissolved oxygen analyzer (10) Measuring And performing a method for measuring a target gas concentration in a radioactive waste gas according to any one of claims 1 to 3;
still include first three-way valve (1), pressure regulator (2), explosion-proof pump (3), second three-way valve (4), radioactive waste gas passes through the pipeline and sends into the input of first three-way valve (1), and two outputs of first three-way valve (1) are respectively through the input of pipeline butt joint pressure regulator (2), the input of explosion-proof pump (3), and the output of pressure regulator (2), the output of explosion-proof pump (3) are respectively through two inputs of pipeline butt joint second three-way valve (4), and the output of second three-way valve (4) is through the pipeline butt joint respectively one of the one end of first needle valve (6) one of the other end of second needle valve (9).
5. An apparatus for performing a method for measuring a target gas concentration in a radioactive waste gas according to claim 4, wherein: the device also comprises a first flowmeter (8) and a second flowmeter (11); the output end of the electrochemical dissolved hydrogen analyzer (7) is connected with one end of the first flowmeter (8) in a butt joint mode through a pipeline, the output end of the fluorescence dissolved oxygen analyzer (10) is connected with one end of the second flowmeter (11) in a butt joint mode through a pipeline, the other end of the first flowmeter (8) and the other end of the second flowmeter (11) are converged through a pipeline, and the output is carried out after passing through the pressure gauge (12) and the thermometer (13) through the pipeline.
6. An apparatus for performing a method for measuring a target gas concentration in a radioactive waste gas according to claim 5, wherein: the filter also comprises a filter (5), wherein the output end of the second three-way valve (4) is in butt joint with the input end of the filter (5) through a pipeline, and the output end of the filter (5) is in butt joint with one end of the first needle valve (6) and one end of the second needle valve (9) through pipelines respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232338.6A CN113984855B (en) | 2021-10-22 | 2021-10-22 | Method and device for measuring concentration of target gas in radioactive waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232338.6A CN113984855B (en) | 2021-10-22 | 2021-10-22 | Method and device for measuring concentration of target gas in radioactive waste gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113984855A CN113984855A (en) | 2022-01-28 |
| CN113984855B true CN113984855B (en) | 2024-01-23 |
Family
ID=79740325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111232338.6A Active CN113984855B (en) | 2021-10-22 | 2021-10-22 | Method and device for measuring concentration of target gas in radioactive waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113984855B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509472B (en) * | 2022-04-19 | 2022-07-19 | 佛山速敏智能仪器科技有限公司 | Gas detection system, detection method and gas detection device in transformer oil |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002247807A (en) * | 2001-02-19 | 2002-08-30 | Hitachi Ltd | Rotating machine, failure detecting method therefor generator, rotating machine, and failure detecting method therefor |
| WO2014024984A1 (en) * | 2012-08-09 | 2014-02-13 | 大陽日酸株式会社 | Hydrogen mixed gas supply device for medical purposes |
| CN208771141U (en) * | 2018-05-17 | 2019-04-23 | 盐城工学院 | A kind of detection of hydrogen chloride tail gas absorption strength and automatic cycle absorption plant |
| CN110082488A (en) * | 2019-04-19 | 2019-08-02 | 山西省计量科学研究院 | A kind of dissolved oxygen metering calibrating installation and method |
| CN110366797A (en) * | 2017-03-06 | 2019-10-22 | 懿华水处理技术有限责任公司 | The implementation of feedback control for the design of improved electro-chemical systems |
| CN110749625A (en) * | 2019-11-19 | 2020-02-04 | 江苏核电有限公司 | Radioactive gas online analysis integrated device |
| CN111044597A (en) * | 2019-12-30 | 2020-04-21 | 上海誉琰科技有限公司 | Gas-liquid two-phase oxygen analyzer and working method |
| CN111289601A (en) * | 2020-02-20 | 2020-06-16 | 四川大学 | Method for improving measurement accuracy of dissolved gas concentration in water body |
| CN112213439A (en) * | 2020-07-31 | 2021-01-12 | 华电电力科学研究院有限公司 | Device and method for measuring content of dissolved hydrogen in high-temperature high-pressure steam |
| CN112834721A (en) * | 2021-02-23 | 2021-05-25 | 昆明理工大学 | Based on UV/H2O2Method and device for detecting COD (chemical oxygen demand) of water quality by technology |
| CN113466423A (en) * | 2021-07-28 | 2021-10-01 | 西安热工研究院有限公司 | Dissolved oxygen meter calibration test system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2256491B1 (en) * | 2008-03-04 | 2016-01-27 | EUREKA-LAB Inc. | Method of evaluating reaction between dissolved hydrogen and dissolved oxygen and method of evaluating ability of dissolved hydrogen to scavenge active oxygen in water |
-
2021
- 2021-10-22 CN CN202111232338.6A patent/CN113984855B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002247807A (en) * | 2001-02-19 | 2002-08-30 | Hitachi Ltd | Rotating machine, failure detecting method therefor generator, rotating machine, and failure detecting method therefor |
| WO2014024984A1 (en) * | 2012-08-09 | 2014-02-13 | 大陽日酸株式会社 | Hydrogen mixed gas supply device for medical purposes |
| CN110366797A (en) * | 2017-03-06 | 2019-10-22 | 懿华水处理技术有限责任公司 | The implementation of feedback control for the design of improved electro-chemical systems |
| CN208771141U (en) * | 2018-05-17 | 2019-04-23 | 盐城工学院 | A kind of detection of hydrogen chloride tail gas absorption strength and automatic cycle absorption plant |
| CN110082488A (en) * | 2019-04-19 | 2019-08-02 | 山西省计量科学研究院 | A kind of dissolved oxygen metering calibrating installation and method |
| CN110749625A (en) * | 2019-11-19 | 2020-02-04 | 江苏核电有限公司 | Radioactive gas online analysis integrated device |
| CN111044597A (en) * | 2019-12-30 | 2020-04-21 | 上海誉琰科技有限公司 | Gas-liquid two-phase oxygen analyzer and working method |
| CN111289601A (en) * | 2020-02-20 | 2020-06-16 | 四川大学 | Method for improving measurement accuracy of dissolved gas concentration in water body |
| CN112213439A (en) * | 2020-07-31 | 2021-01-12 | 华电电力科学研究院有限公司 | Device and method for measuring content of dissolved hydrogen in high-temperature high-pressure steam |
| CN112834721A (en) * | 2021-02-23 | 2021-05-25 | 昆明理工大学 | Based on UV/H2O2Method and device for detecting COD (chemical oxygen demand) of water quality by technology |
| CN113466423A (en) * | 2021-07-28 | 2021-10-01 | 西安热工研究院有限公司 | Dissolved oxygen meter calibration test system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113984855A (en) | 2022-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108181432B (en) | Method for testing full-component emission of motor vehicle exhaust pollutants | |
| CN108007699B (en) | Modularized vehicle-mounted emission test platform for tail gas pollutants of motor vehicle | |
| CN113984855B (en) | Method and device for measuring concentration of target gas in radioactive waste gas | |
| CN103076429A (en) | System for monitoring tail gas of moving source on line and sampling pollutants | |
| CN106092840B (en) | Method for testing exhaust gas discharge of large pollution source | |
| CN105004801A (en) | Loop heat pipe ammonia working medium purity analysis device | |
| Lao et al. | A portable, robust, stable, and tunable calibration source for gas-phase nitrous acid (HONO) | |
| CN114235941A (en) | Direct detection device and method for non-methane total hydrocarbons in ambient air | |
| CN101308088B (en) | System and method for measuring chemical fertilizer volatile gas | |
| CN202869975U (en) | Online automatic testing device for liquid or gas sulfur content | |
| CN102830081A (en) | Online COD/TOC/TN automatic monitor through high-temperature combustion oxidation method | |
| CN113959792A (en) | Device and method for measuring mercury in flue gas based on low-temperature plasma pyrolysis | |
| CN207730717U (en) | A kind of carbon emission on-line detecting system | |
| CN113029996A (en) | Hydrogen purity online detection instrument and use method and application thereof | |
| CN112539978A (en) | Method for obtaining absorption efficiency of nuclear island chimney C-14 sampling device of nuclear power station | |
| JP2006284508A (en) | On-vehicle exhaust gas analyzer | |
| CN209783996U (en) | vehicle-mounted test platform for motor vehicle exhaust based on dynamic dilution method | |
| JP2014174054A (en) | Exhaust gas analyzer | |
| CN109612931A (en) | A kind of gas phase molecular absorption spectrometer | |
| JP2006145341A (en) | Gas-sampling method and gas sampler | |
| CN110579379B (en) | Motor vehicle tail gas flexible sampling system and sampling method | |
| CN216013139U (en) | CO2 breath isotope detector | |
| CN213633307U (en) | Environmental air volatile organic compound PAMS57 on-line monitoring system | |
| CN217484270U (en) | Detection device for directly measuring non-methane total hydrocarbon content | |
| CN214067049U (en) | Diluting device suitable for atmospheric pollutants concentration monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |