CN104614285A - Device for measuring oxygen transfer rate in liquid metal - Google Patents
Device for measuring oxygen transfer rate in liquid metal Download PDFInfo
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- CN104614285A CN104614285A CN201510060755.5A CN201510060755A CN104614285A CN 104614285 A CN104614285 A CN 104614285A CN 201510060755 A CN201510060755 A CN 201510060755A CN 104614285 A CN104614285 A CN 104614285A
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Abstract
The invention discloses a device for measuring an oxygen transfer rate in liquid metal. The device is composed of a liquid metal valve, a liquid metal flowmetre, a gas-liquid mass exchange chamber, a solid-phase oxygen source mass exchanger, a liquidometer, a U-shaped liquid metal flow channel, oxygen meters and the like. According to the change time step of oxygen concentration, detected by the oxygen meter at each position, a known macroscopic diffusion free path, and a corresponding oxygen concentration numerical value at the position, the mass diffusivity of oxygen in liquid heavy metal and a saturation state evolutionary mechanism are obtained by adopting a Fick diffusion law, so that the oxygen transfer rate is obtained; measurement of the oxygen transfer rate in the liquid heavy metal in static and flow states and measurement of the oxygen transfer rate in the liquid heavy metal at different flow velocities and temperatures are realized synchronously; simultaneously, the gas-liquid mass exchanger and a solid-liquid mass exchanger are integrated on the same device, and therefore, switching between gas-liquid exchange reaction and solid-liquid exchange reaction can be realized through simple conversion operation.
Description
Technical field
The present invention relates to oxygen migration rate measurement device in a kind of liquid metal, the pre-grinding device of oxygen control technology in Accelerator Driven Subcritical heap (ADS) is used for, for the oxygen control techniques of following ADS reactor provides simple research platform and tachnical storage in particular to one.
Background technology
Liquid lead bismuth alloy LBE (Lead bismuth eutectic) is the preferred material of spallation target and the important candidate material of cooling medium of advanced fast reactor in the subcritical system (ADS) of Accelerator driven.The thermophysical property special due to liquid lead bismuth and chemical property, such as low melting point (123.5 DEG C), higher boiling (1670 DEG C), high heat conductance, low-steam pressure and do not have violent reaction etc. with air and water, liquid lead bismuth is worldwide extensively studied as the cooling medium of ADS spallation target and advanced fast reactor at present.
Due to the physicochemical characteristics that lead bismuth alloy is special, the key scientific problems of lead bismuth alloy must be furtherd investigate before ADS system plumbous bismuth cooled reactor commercial applications.The corrosion of liquid lead bismuth flow at high speed can cause material composition structure to change so that material property declines, and affects security and the life-span of reactor, and therefore the corrosion of liquid lead bismuth to structured material is one of advanced nuclear reactor key scientific problems urgently to be resolved hurrily.Extensive research has been carried out in the world for raising material corrosion stability; oxygen concentration wherein in conservative control liquid lead bismuth alloy; to at structured material Surface Creation compact structure and adhesiveness is strong, the oxide layer that can stop component element diffusion dissolution, thus shield to improve material corrosion stability to structured materials such as plumbous bismuth heap and targets.Oxygen concentration in conservative control lead bismuth alloy is one of key scientific problems affecting structured material corrosion behavior in liquid lead bismuth.In liquid lead bismuth, the field of activity of dissolved oxygen DO controls to be one of current focus studied in the world, the too high oxidation corrosion that not only can cause structured material of oxygen concentration, reduce serviceable life, also also can cause the generation of massicot impurity simultaneously, cause the stable operation of the impact heaps such as the obstruction of the plumbous bismuth runner of Main Coolant.Otherwise oxygen concentration is too low also can cause the dissolving of the metallic element of structured material part high-dissolvability under the effect of liquid heavy metal mechanical erosion, causes the heavy corrosion of structured material, cause trommel and the abilities such as pressure-bearing decline.Therefore, the accurate Measurement & Control of the oxygen content in plumbous bismuth improves the corrosion proof important means of structured material, needs to carry out deep Exploration on mechanism and technical research.
Existing research, mainly based on the demand of corrosion experiment, controls in rational scope to the oxygen concentration in experimental section, does not conduct a research to the oxygen concentration homogeneity of plumbous bismuth system whole in large-scale plumbous bismuth device.Study whole plumbous bismuth system oxygen concentration homogeneity, the diffusion of oxygen in plumbous bismuth and migration need be grasped, the present invention is just based on this demand, inventing oxygen migration rate measurement device in a kind of liquid heavy metal, providing theoretical direction to support with experiment for studying whole plumbous bismuth system oxygen concentration homogeneity in large-scale plumbous bismuth device.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of security good and structure is simple, the experimental provision being applicable to realize oxygen migration speed in liquid heavy metal of convenient operation.
The technical solution used in the present invention is: oxygen migration rate measurement device in a kind of liquid heavy metal, comprising: liquid metal valve, liquid metal flux meter, gas-liquid mass exchange room, solid phase oxygen source mass exchanger, liquid level gauge, oxygen analyser and U-shaped runner; Described gas-liquid mass exchange room is communicated with extraneous source of the gas (oxygen source), realizes gas-liquid exchange reaction; When atmosphere in gas-liquid mass exchanger is inert gas, solid phase oxygen source mass exchanger is stretched in liquid heavy metal, realizes solid-liquid exchange reaction; In reaction, oxygen is dissolved in liquid heavy metal and is detected by diverse location oxygen analyser after diffusion, in conjunction with corresponding position and oxygen concentration information, can infer the migration rate of oxygen, this device can realize the measurement of oxygen migration speed in gas-liquid exchange and solid-liquid exchange procedure.
Wherein, described mass exchanger Part I is that gas-liquid mass exchange room is connected with extraneous source of the gas (oxygen source) by metallic conduit and gas valve, lower end and U-shaped flow passage, and gas phase oxygen source and liquid heavy metal are directly reacted; Another part solid phase oxygen source mass exchanger, upper end is connected with flange by expansion corrugated pipe, and lower end is same with U-shaped flow passage, realizes solid phase oxygen source and liquid heavy metal generation mass exchange is reacted by regulating corrugated tube.
The advantage that the present invention compared with prior art has is as follows:
(1) overall construction design of the present invention is simple, and security is good, is easy to realize and operation, realizes the measurement of oxygen migration speed in gas-liquid exchange and solid-liquid exchange procedure simultaneously, is commonly used to material diffusion experiment research in liquid metal.
(2) gas-liquid mass exchanger and solid-liquid mass exchanger are integrated on same device, namely can realize gas-liquid exchange reaction and solid-liquid exchange reaction switches by simple conversion operations.
(3) this device adopts the multimetering in less space that achieves of the U-shaped smart structural design of tightly packed formula to obtain the migration of oxygen under long distance condition and transport, and in long-range, multimetering is conducive to the precision improving detection oxygen migration speed.
Accompanying drawing explanation
Fig. 1 is oxygen migration rate measurement device structural representation in a kind of liquid metal of the present invention; Wherein, 1 be liquid metal valve, 2 be liquid metal flux meter, 3 be gas-liquid mass exchange room, 4 be solid phase oxygen source mass exchanger, 5 be liquid level gauge, 6 be oxygen analyser, 7 for U-shaped runner.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and specific embodiment.
As shown in Figure 1, oxygen migration rate measurement device in a kind of liquid metal of the present invention, comprises liquid metal valve 1, liquid metal flux meter 2, gas-liquid mass exchange room 3, solid phase oxygen source mass exchanger 4, liquid level gauge 5, oxygen analyser 6, U-shaped runner 7.First two ends liquid metal valve 1 and gas valve closing; whole device repeatedly to be vacuumized and after argon replaces; whole device is filled pressure-fired protection (high-purity argon gas); by tracing system, whole device is preheated to 300 DEG C; slowly open liquid metal valve 1, bismuth part plumbous in the circulation system is injected in this device, after liquid level gauge 5 detects liquid level signal; close liquid metal valve 1, the gaseous tension in gas-liquid mass exchange room 3 is adjusted to an atmospheric pressure.During gas-liquid exchange reaction, gas oxygen source is opened and is charged to gas-liquid mass exchange room 3, pressure to two atmospheric pressure, monitor the conversion of each oxygen analyser signal, oxygen concentration migration rate during by obtaining gas-liquid exchange reaction after data collection and analysis.During solid-liquid exchange reaction, atmosphere in gas-liquid mass exchange room 3 is high-purity argon gas (inert atmosphere), regulate the corrugated tube of solid phase oxygen source mass exchanger 4 upper end, solid phase oxygen source mass exchanger 4 is submerged in liquid lead bismuth solid-liquid exchange reaction occurs, the conversion of same monitoring each oxygen analyser signal, oxygen concentration migration rate during by obtaining gas-liquid exchange reaction after data collection and analysis.The measurement of oxygen migration speed in static plumbous bismuth under realizing different temperatures operating mode by adjusting the temperature of tracing system.
After plumbous bismuth injects this device, open the liquid metal valve 1 of rear end, allow plumbous bismuth in whole device, run together with the circulation system, the measurement of oxygen migration speed when realizing gas-liquid/solid-liquid exchange reaction under flow operating mode, by the adjustment regulating the aperture of liquid metal valve 1 to realize flow, the temperature of liquid lead bismuth simultaneously controlling to flow into this device realizes the measurement of oxygen migration speed under different temperatures operating mode.
Non-elaborated part of the present invention belongs to techniques well known.
And the above; be only the embodiment in the present invention; but protection scope of the present invention is not limited thereto; any people being familiar with this technology is in the technical scope disclosed by the present invention; the conversion or replacement expected can be understood; all should be encompassed in and of the present inventionly comprise within scope, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. an oxygen migration rate measurement device in liquid metal, is characterized in that comprising: liquid metal valve (1), liquid metal flux meter (2), gas-liquid mass exchange room (3), solid phase oxygen source mass exchanger (4), liquid level gauge (5), oxygen analyser (6) and U-shaped runner (7); Described gas-liquid mass exchange room (3) is communicated with extraneous source of the gas (oxygen source), realizes gas-liquid exchange reaction; When atmosphere is inert gas in gas-liquid mass exchange room (3), solid phase oxygen source mass exchanger (4) is stretched in liquid heavy metal, realizes solid-liquid exchange reaction; In reaction, oxygen is dissolved in liquid heavy metal and is detected by diverse location oxygen analyser after diffusion, in conjunction with corresponding position and oxygen concentration information, can infer the migration rate of oxygen, this device can realize the measurement of oxygen migration speed in gas-liquid exchange and solid-liquid exchange procedure.
2. oxygen migration rate measurement device in a kind of liquid metal according to claim 1, it is characterized in that comprising: described mass exchanger Part I is that gas-liquid mass exchange room (3) is connected with extraneous source of the gas (oxygen source) by metallic conduit and gas valve, lower end is communicated with U-shaped runner (7), and gas phase oxygen source and liquid heavy metal are directly reacted; Another part solid phase oxygen source mass exchanger (4), upper end is connected with flange by expansion corrugated pipe, and lower end is communicated with U-shaped runner (7) equally, realizes solid phase oxygen source and liquid heavy metal generation mass exchange is reacted by regulating corrugated tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510060755.5A CN104614285B (en) | 2015-02-05 | 2015-02-05 | Oxygen migration rate measurement device in a kind of liquid metal |
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| CN201510060755.5A CN104614285B (en) | 2015-02-05 | 2015-02-05 | Oxygen migration rate measurement device in a kind of liquid metal |
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| CN104614285A true CN104614285A (en) | 2015-05-13 |
| CN104614285B CN104614285B (en) | 2018-02-09 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006063435A (en) * | 2004-07-29 | 2006-03-09 | Shin Kobe Electric Mach Co Ltd | Method for producing molten metal of lead alloy |
| CN103076820A (en) * | 2013-01-18 | 2013-05-01 | 中国科学院合肥物质科学研究院 | Experimental device suitable for solid-phase oxygen control reaction |
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2015
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006063435A (en) * | 2004-07-29 | 2006-03-09 | Shin Kobe Electric Mach Co Ltd | Method for producing molten metal of lead alloy |
| CN103076820A (en) * | 2013-01-18 | 2013-05-01 | 中国科学院合肥物质科学研究院 | Experimental device suitable for solid-phase oxygen control reaction |
Non-Patent Citations (2)
| Title |
|---|
| CARSTEN SCHROER ET AL: ""Gas/liquid oxygen-transfer to flowing lead alloys"", 《NUCLEAR ENGINEERING AND DESIGN》 * |
| 张敏 等: ""温度对静态铅铋中氧浓度变化的影响"", 《核科学与工程》 * |
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