CN104392755B - Liquid-state heavy metal oxygen concentration control solid-liquid exchange reaction apparatus under flowing working condition - Google Patents
Liquid-state heavy metal oxygen concentration control solid-liquid exchange reaction apparatus under flowing working condition Download PDFInfo
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- CN104392755B CN104392755B CN201410493941.3A CN201410493941A CN104392755B CN 104392755 B CN104392755 B CN 104392755B CN 201410493941 A CN201410493941 A CN 201410493941A CN 104392755 B CN104392755 B CN 104392755B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
- G21C17/022—Devices or arrangements for monitoring coolant or moderator for monitoring liquid coolants or moderators
- G21C17/025—Devices or arrangements for monitoring coolant or moderator for monitoring liquid coolants or moderators for monitoring liquid metal coolants
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- 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 present invention discloses a liquid-state heavy metal oxygen concentration control solid-liquid exchange reaction apparatus under the flowing working condition, wherein the oxygen concentration in the whole liquid-state heavy metal system is adjusted by controlling the temperature and the flow rate of the liquid-state heavy metal flowing through a reaction container. With the apparatus of the present invention, the problems of the reaction container temperature control, no damage of the mass exchanger on the whole reaction container and the like are cleverly solved. The apparatus comprises a mass exchanger, an oxygen measurement meter, a built-in heating rod, a built-in thermocouple, an air cooling device, a filtration screen type filter, a liquid-state metal valve, a liquid-state metal flow meter, and a reaction container. According to the present invention, the temperature of the liquid-state heavy metal is stable and controllable; the electronically controlled liquid-state metal valve and the liquid-state metal flow meter are adopted to precisely control the flow rate of the liquid-state metal in the reaction container; the filtration screen type filter is arranged, the impurity in the liquid-state heavy metal can be filtered out, and the influence of entering of the impurity into the mass exchanger and adsorbing on the surface of oxygen source particles on the oxygen source particle oxygen exchange efficiency can be prevented; and the flange type or ferrule type connection is adopted so as to provide characteristics of easy removal, easy replacement and easy maintenance.
Description
Technical field
The present invention is applied to new nuclear industry and nuclear technology field, is mainly used in Accelerator Driven Subcritical heap (ADS)
With advanced reactor liquid metal coolant oxygen content On-line Control.
Background technology
Liquid lead bismuth alloy LBE (Lead bismuth eutectic) is in the subcritical system (ADS) of Accelerator driven
The important candidate material of coolant of the preferred material of spallation target and advanced fast reactor.Due to the special thermophysical property of liquid lead bismuth and
Chemical property, such as low melting point (123.5 DEG C), high boiling point (1670 DEG C), high heat conductance, low-steam pressure and not having with air and water
There is violent reaction etc., liquid lead bismuth is worldwide extensively ground currently as the coolant of ADS spallation target and advanced fast reactor
Study carefully.
But it becomes the restriction of the maximum of its extensive utilization to the corrosivity of steel.Liquid lead bismuth is right under high temperature environment
It is directly exposed to steel therein and there is very severe corrosive.In liquid lead bismuth, the corrosion in order to prevent material there must be one
The dissolved oxygen of fixed activity, the activity of dissolved oxygen must enough thermodynamics to avoid material oxidation layer dissolve, and plays protected material
The effect of material.But the oxygen activity that will generate less than PbO, if separated out beyond will result in solid-state PbO, forms oxide residual simultaneously
Slag, pollutes wholly liquid state lead bismuth system.In a word, the operating condition of liquid lead bismuth is it has to be ensured that the power of oxide layer on surface of material
Learn balance and prevent oxide precipitation from generating.Due to above reason, the dissolved oxygen that is monitored and controlled in liquid lead bismuth is that have very much must
Want.The method of oxygen concentration is controlled mainly to have vapor phase method and two kinds of solid phase method at present.The document published shows only at some
There is the application of solid phase oxygen control in loop apparatus.Existing one kind is applied to experiment solid phase oxygen control device (patent is disclosed), liquid
Lead bismuth is static it is adaptable to solid phase oxygen control study mechanism, and following solid phase oxygen control will be with to lead base reactor, the work of lead bismuth
Condition is flowing.The technological difficulties realizing solid phase oxygen control under lead bismuth flow operating mode are that PbO grain dissolution is right with deposition process
The preventing poison flowing through the precise control of lead bismuth temperature and flow and PbO granule in mass exchanger (corrodes impurity and is deposited on PbO
Grain surface, PbO grain dissolution will lose efficacy with deposition function).The present invention will overcome these difficult points.Develop liquid under a kind of flow operating mode
State heavy metal oxygen concentration controls solid-liquid exchange reaction device, has both been suitable for Study on Correlative Mechanisms, and have larger engineering should simultaneously
With being worth.
Content of the invention
The technical problem that the present invention intends to solve is：Overcome the deficiencies in the prior art, provide a kind of safety good and structure letter
Singly, it is easy to operate, and be adapted to carry out the experimental provision of solid phase oxygen control technology under flow operating mode.
The technical problem scheme that the present invention intends to solve is：Under a kind of flow operating mode, liquid heavy metal oxygen concentration controls solid-liquid to hand over
Change reaction unit, including：Liquid metal valve, flow of liquid metal gauge, reaction vessel, net type filter, oxygen analyser, air cooling
Device, mass exchanger, built-in heating rod and built-in thermocouple；Wherein liquid metal valve, flow of liquid metal gauge, filter net type
Filter, oxygen analyser are connected on reaction vessel gateway, and air cooling device is wrapped in reaction vessel periphery, mass exchanger, built-in
Heating rod and built-in thermocouple are connected on the reaction vessel by cutting ferrule or flange；Described mass exchanger pass through standard flange with
Reaction vessel connects, and positioned at reaction vessel cylinder center, is inserted into reaction container bottom it is easy to change；Described built-in heating rod
It is to be heated and cool down to flowing through liquid heavy metal in mass exchanger with air cooling device, adjust the power being heated or cooled,
It is used for obtaining suitable liquid heavy metal temperature；In described net type filter filter liquid state heavy metal, impurity prevents impurity from entering
Adsorb in exchanger in oxygen source particle surface, the efficiency that impact oxygen source granule oxygen exchanges；Open before and after's liquid metal valve, pass through
Flow of liquid metal gauge control valve aperture regulation flows through liquid heavy metal flow in reaction vessel, then through net type filter
Detect oxygen concentration in liquid heavy metal through oxygen analyser after filtering solid impurity therein and feed back to control system regulation air cooling device
Cooling power and built-in heating rod heating power make liquid heavy metal quickly reach suitable temperature, and such liquid heavy metal flows through
Mass exchanger and oxygen source granule occur to carry suitable oxygen concentration outflow reaction vessel after oxygen exchange reaction.
Further, oxygen source granule is fixed on by mass exchanger by freely stretching spring and the pressure strip that is connected with spring
In mass exchanger, will extend when oxygen source has certain consumption freely to stretch spring, compensatory reactionBu Changfanying rear mass exchanger for a period of time
Inner volume changes, and such oxygen source granule is still tightly secured in mass exchanger, and the cylinder wherein holding oxygen source granule is in porous
Structure is it is ensured that liquid heavy metal can pass through and the effect of oxygen source granule.
The present invention compared with prior art has the advantage that as follows：
(1) overall construction design of the present invention is simple, it is easy to accomplish and operation, mass exchanger, net type filter, oxygen
Sensor, built-in heating rod, built-in thermocouple etc. are all connected using flange form or bite type, solve the sealing of device even
The problems such as connect, dismantle difficulty；Prevent from impurity from entering in mass exchanger using net type filter to adsorb in PbO granule table simultaneously
Face (anti-PbO granule is poisoned), the efficiency that impact PbO granule oxygen exchanges, it is commonly used to advanced reactor oxygen control experimentation.
(2) oxygen source granule is fixed on mass exchanger by freely stretching spring and the pressure strip that is connected with spring by the present invention
Interior, will extend when oxygen source has certain consumption freely to stretch spring, compensatory reactionBu Changfanying rear mass exchanger inner volume change for a period of time,
So oxygen source granule is still tightly secured in mass exchanger, prevents PbO particles float upper in the cylinder holding oxygen source granule
Half part, affects oxygen exchange efficiency.
Brief description
Fig. 1 is present configuration schematic diagram；In figure：1 is liquid metal valve, and 2 is flow of liquid metal gauge, and 3 is reaction
Container, 4 is net type filter, and 5 is oxygen analyser, and 6 is air cooling device, and 7 is mass exchanger, and 8 is built-in heating rod, and 9 is interior
Put thermocouple；
Fig. 2 is mass exchanger schematic diagram in the present invention；In figure：A1 is flange, and A2 is holddown spring, and A3 is compression
Plate, A4 is the cylinder holding PbO granule, and A5 is fix bar, and A6 is PbO granule, and A7 is fixing nut.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment further illustrates the present invention.
As shown in figure 1, liquid heavy metal oxygen concentration controls solid-liquid exchange reaction device, this device bag under a kind of flow operating mode
Include：Liquid metal valve 1, flow of liquid metal gauge 2, reaction vessel 3, net type filter 4, oxygen analyser 5, air cooling device 6, matter
Amount exchanger 7, built-in heating rod 8 and built-in thermocouple 9.First pass through the heat tracing electricity of built-in heating rod 8 and reaction vessel 3 periphery
Whole device is preheated to 300 DEG C by cable, is incubated 12 hours, slowly by lead bismuth injection experimentses system and this device；Experimental system
Middle oxygen sensor outgoing signal shows the too low heating work(feeding back to control system, increasing built-in heating rod 8 of the oxygen concentration of lead bismuth
Rate and raising liquid metal valve 1 aperture, so flow through the lead bismuth temperature of mass exchanger and flow velocity all improve, increase PbO
The dissolving of grain, produces Pb after PbO dissolving and [O] dissolves in lead bismuth alloy, and such lead bismuth outflow reaction vessel will carry substantial amounts of
To in whole lead bismuth system, it is higher than import oxygen analyser 5 that the oxygen analyser 5 of outlet detects oxygen concentration signal to oxygen；In the same manner, experimental system
The too high heating work(feeding back to control system, reducing built-in heating rod 8 of oxygen concentration in middle oxygen sensor outgoing signal display lead bismuth
Rate with start air cooling device 6 and reduction liquid metal valve 1 aperture, so flow through the lead bismuth temperature of mass exchanger and flow velocity all
Reduce, increase the deposition that dissolved oxygen [O] and Pb in lead bismuth form PbO granule, be attached to PbO particle surface or filtered by filter net type
Device 4 stops, and such lead bismuth flows out reaction vessel oxygen concentration to be reduced, and it is higher than outlet that the oxygen analyser 5 of import detects oxygen concentration signal
Oxygen analyser 5.By automatic control system, realize oxygen concentration in lead bismuth and automatically adjust.
As shown in Fig. 2 being the structural representation of mass exchanger 7, primary structure includes：Flange A1, holddown spring
A2, pressure strip A3, the cylinder A4 holding PbO granule, fix bar A5, PbO granule A6, fixing nut A7 etc. form.PbO granule becomes
Spherical shape, is arranged closely in the cylinder holding PbO granule, by pressure strip and the holddown spring that is through in fix bar by PbO
Granule is tightly pushed down, when PbO granule due to dissolving taper into, spring will extend, by push away pressure strip will PbO granule tightly
It is fixed in the cylinder holding PbO granule.Lead bismuth is entered in mass exchanger by the porous holding the cylinder periphery of PbO granule
Portion is reacted with PbO granule, leaves mass exchanger after carrying out oxygen exchange.Whole mass exchanger is fixed by flange
On reaction vessel 3.
Non-elaborated part of the present invention belongs to techniques well known.
And the above, the only specific embodiment in the present invention, but protection scope of the present invention is not limited thereto,
Any people being familiar with this technology disclosed herein technical scope in it will be appreciated that the conversion expected or replacement, all should cover
Within the scope of the comprising of the present invention, therefore, protection scope of the present invention should be defined by the protection domain of claims.
Claims (1)
1. under a kind of flow operating mode, liquid heavy metal oxygen concentration controls solid-liquid exchange reaction device it is characterised in that including：Liquid
Metal valve (1), flow of liquid metal gauge (2), reaction vessel (3), net type filter (4), oxygen analyser (5), air cooling device
(6), mass exchanger (7), built-in heating rod (8) and built-in thermocouple (9)；Wherein liquid metal valve (1), flow of liquid metal
Gauge (2), net type filter (4), oxygen analyser (5) are connected on reaction vessel (3) gateway, and air cooling device (6) is wrapped in instead
Answer container (3) periphery, mass exchanger (7), built-in heating rod (8) and built-in thermocouple (9) are connected to by cutting ferrule or flange
On reaction vessel (3)；Described mass exchanger (7) is connected with reaction vessel (3) by standard flange, positioned at reaction vessel (3)
Cylinder center, is inserted into reaction container bottom it is easy to change；Described built-in heating rod (8) and air cooling device (6) are to flowing through matter
In amount exchanger, liquid heavy metal is heated and is cooled down, and adjusts the power being heated or cooled, for obtaining suitable liquid weight
Metal temperature；Impurity in described net type filter (4) filter liquid state heavy metal, prevents impurity from entering in mass exchanger and adsorbs
In oxygen source particle surface, affect the efficiency that oxygen source granule oxygen exchanges；Open before and after's liquid metal valve (1), by liquid metal
Effusion meter (2) controls liquid metal valve aperture regulation to flow through liquid heavy metal flow in reaction vessel (3), then through filter screen type
Filter (4) detects oxygen concentration in liquid heavy metal through oxygen analyser (5) after filtering solid impurity therein and feeds back to control system
Adjust air cooling device (6) cooling power and built-in heating rod (8) heating power make liquid heavy metal quickly reach suitable temperature,
So liquid heavy metal flows through mass exchanger (7) and occurs to carry suitable oxygen concentration outflow after oxygen exchange reaction with oxygen source granule
Reaction vessel；
Oxygen source granule is fixed on mass exchanger by freely stretching spring and the pressure strip that is connected with spring by mass exchanger (7)
Interior, will extend when oxygen source has certain consumption freely to stretch spring, rear mass exchanger (7) inner volume becomes compensatory reactionBu Changfanying for a period of time
Change, such oxygen source granule is still tightly secured in mass exchanger (7), the cylinder wherein holding oxygen source granule is in loose structure,
Guarantee that liquid heavy metal can pass through and the effect of oxygen source granule；
Under this flow operating mode, liquid heavy metal oxygen concentration controls the overall construction design of solid-liquid exchange reaction device simple it is easy to real
Now and operation, mass exchanger, net type filter, oxygen analyser, built-in heating rod, built-in thermocouple all using flange form or
Bite type connects, and solves being tightly connected, dismantling difficult problem of device；Prevent impurity from entering using net type filter simultaneously
Adsorb in mass exchanger in PbO particle surface；
Under this flow operating mode, liquid heavy metal oxygen concentration controls solid-liquid exchange reaction device to prevent PbO particles float from holding oxygen source
The top half of the cylinder of granule, affects oxygen exchange efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410493941.3A CN104392755B (en) | 2014-09-24 | 2014-09-24 | Liquid-state heavy metal oxygen concentration control solid-liquid exchange reaction apparatus under flowing working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493941.3A CN104392755B (en) | 2014-09-24 | 2014-09-24 | Liquid-state heavy metal oxygen concentration control solid-liquid exchange reaction apparatus under flowing working condition |
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| CN104392755A CN104392755A (en) | 2015-03-04 |
| CN104392755B true CN104392755B (en) | 2017-02-15 |
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| RU2547104C2 (en) * | 2013-08-26 | 2015-04-10 | Открытое Акционерное Общество "Акмэ-Инжиниринг" | Mass-transfer apparatus |
| CN106774481B (en) * | 2016-12-12 | 2023-11-14 | 中广核研究院有限公司 | Device and system for controlling oxygen concentration in liquid LBE/Pb coolant |
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| CN110284043A (en) * | 2019-07-23 | 2019-09-27 | 深圳市启晟新材科技有限公司 | A kind of 200-300 degree nuclear reactor control oxygen type liquid metal and its compatibility technique |
| CN110306098A (en) * | 2019-07-23 | 2019-10-08 | 深圳市启晟新材科技有限公司 | A kind of heat transfer of nuclear reactor 300-400 degree liquid metal and its control oxygen activity technique |
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