CN103531257B - The primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy - Google Patents
The primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy Download PDFInfo
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- CN103531257B CN103531257B CN201310415444.7A CN201310415444A CN103531257B CN 103531257 B CN103531257 B CN 103531257B CN 201310415444 A CN201310415444 A CN 201310415444A CN 103531257 B CN103531257 B CN 103531257B
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- subgrade
- primary ioops
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- bismuth alloy
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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
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The present invention relates to field of nuclear energy equipment, disclose the primary Ioops ooling channel of particle deposition in a kind of anti-liquid lead bismuth alloy, comprise primary Ioops interior conduit and the outer zone of heating arranged thereof.Increase the zone of heating be arranged on outside primary Ioops interior conduit, heat to interior conduit by zone of heating, make the temperature of interior conduit higher than cooling medium lead bismuth alloy fluid temperature (F.T.), utilize thermophoresis principle, in cooling medium, not molten fine particulates can move to the low side of temperature from the side that temperature is high, namely particle moves from inner-walls of duct to pipeline center, and can not move to inner-walls of duct, thus prevents particle to be deposited on duct wall.It is simple that this device has structure, and the feature maintained easily, can improve security and the heat-exchange performance of primary coolant circuit pipe effectively.
Description
Technical field
The present invention relates to field of nuclear energy equipment, be specifically related to deposit pipeline with the anti-particle that liquid lead bismuth alloy is primary Ioops cooling medium.
Background technology
Liquid lead bismuth alloy (LBE) is as ADS(forth generation reactor and accelerator driving system) spallation target holds concurrently cooling medium, except it has good neutronics performance, also there is excellent anti-radiation performance, heat transfer property and security feature, the life-span of target system and the security of subcritical reactor can be improved.In addition, its higher boiling, chemical inertness and and the near natural-circulation capacity of aqueous phase, make forth generation reactor and accelerator driving system (ADS) have significant security and economy.Therefore, lead bismuth alloy become current ADS design in spallation target to hold concurrently the preferred material of cooling medium.
But the flowing of lead bismuth alloy fluid can on impacts such as structured material and pipeline generation corrosion wash away, this will produce a large amount of fine particle things, in addition, inevitably containing some impurity in lead bismuth alloy, the impurity that wherein fusing point is higher than plumbous bismuth exists with particulate form in plumbous bismuth fluid because of not melting.But the research of liquid towards lead bismuth alloy concentrates on Study on Physical and Core Design aspect at present, and there is no the research of particle deposition impact in liquid towards lead bismuth alloy both at home and abroad.
Particle existence not only can have an impact to the hot physical property of plumbous bismuth obviously, and can have an impact to the heat transfer characteristic etc. of plumbous bismuth fluid.If these particles are deposited on reactor core and heating surface, seriously can reduce its heat transfer property, even may occur that localized heat transfer worsens.In addition, particle flows along with plumbous bismuth fluid, also may aggravate the abrasion and corrosion of structured material and pipeline etc., affects the serviceable life of material.Domesticly at present there is no good anti-deposition measure, and primary coolant circuit pipe condition of work is special, under high-temperature and high-pressure conditions, a lot of anti-deposition measure can be restricted.
So in order to prevent particle in liquid lead bismuth alloy to be deposited on inner-walls of duct, by carrying out appropriate design to pipeline configuration and selecting suitable material, the pipeline with good anti-deposition effect may be developed, to obtain better economy and safe reliability.
Summary of the invention
Deposit in primary coolant circuit pipe to solve fine particle in primary Ioops cooling medium (LBE), reduce cooling medium fluid ability, heat transfer deterioration, accelerate the problem of pipeline erosion corrosion, present inventor has performed and study with keen determination, found that: by using a kind of zone of heating be arranged on outside primary Ioops interior conduit, to pipeline heating, make pipe temperature higher than coolant temperature, thus between pipeline and cooling medium (LBE) formation temperature gradient.Utilize thermophoresis principle, particle can move from the side that temperature is high to the side that temperature is low.So by thermophoretic forces, the particle being attached to inner-walls of duct can move to pipeline center, effectively prevents particle to be deposited on pipeline, thus completes the present invention.
The object of the present invention is to provide following technical scheme.
(1) the primary Ioops ooling channel that in anti-liquid lead bismuth alloy, particle deposits, is characterized in that, this pipeline comprises primary Ioops interior conduit and its outer zone of heating arranged,
Wherein the external diameter of primary Ioops interior conduit is 730mm-750mm, and wall thickness is 60mm-70mm, is made up of two-phase austenitic stainless steel, primary Ioops interior conduit internal circulation primary Ioops cooling medium (LBE),
Zone of heating comprises a, b, c tri-subgrades from inside to outside successively, wherein a subgrade and c subgrade are stainless steel layer, b subgrade is the mica layer being provided with heat coil, the wall thickness of zone of heating is 80mm-100mm, wherein a subgrade thickness is 20mm-35mm, b subgrade thickness is 20mm-35mm, c subgrade thickness is 20mm-35mm.
(2) the primary Ioops ooling channel of particle deposition in the anti-liquid lead bismuth alloy according to above-mentioned (1), it is characterized in that, the external diameter of primary Ioops interior conduit is 735mm-745mm, and wall thickness is 62mm-66mm.
(3) the primary Ioops ooling channel of particle deposition in the anti-liquid lead bismuth alloy according to above-mentioned (1), it is characterized in that, the wall thickness of zone of heating is 80mm-100mm, and wherein a subgrade thickness is 25-35mm, b subgrade thickness is 25-35mm, c subgrade thickness 25-30mm.
(4) the primary Ioops ooling channel of particle deposition in the anti-liquid lead bismuth alloy according to above-mentioned (1), it is characterized in that, the heating-up temperature of described zone of heating 2 is 480 DEG C-500 DEG C.
(5) the primary Ioops ooling channel of particle deposition in the anti-liquid lead bismuth alloy according to above-mentioned (1) or (4), it is characterized in that, it is 480 DEG C-500 DEG C for making zone of heating 2 heating-up temperature, heater coil is embedded with in b subgrade 4, the number of turn of heater coil wraps is 500 circles, circulating current 20A, generation thermal power is 4400W.
(6) in the anti-liquid lead bismuth alloy according to above-mentioned (5), the primary Ioops ooling channel of particle deposition, is characterized in that, in described b subgrade 4, heater coil is parallel is wrapped in mica material.
(7) in the anti-liquid lead bismuth alloy according to above-mentioned (1), the primary Ioops ooling channel of particle deposition, be is characterized in that, gluedd joint between primary Ioops interior conduit 1 and zone of heating 2 by silica gel.
(8) the primary Ioops ooling channel of particle deposition in the anti-liquid lead bismuth alloy according to above-mentioned (1), it is characterized in that, gluedd joint by silica gel between each subgrade in zone of heating 2, namely gluedd joint by silica gel between a subgrade and b subgrade, gluedd joint by silica gel between b subgrade and c subgrade
The heating-up temperature of described zone of heating is 480 DEG C-500 DEG C, namely the heat coil heating temp in zone of heating set by b subgrade is kept to be 480 DEG C-500 DEG C, temperature is delivered to primary Ioops interior conduit through a subgrade, the temperature of primary Ioops interior conduit is made to be elevated to 480 DEG C, higher than the temperature (less than 327 DEG C) of liquid lead bismuth alloy cooling medium, form bulk temperature gradient thus, utilize thermophoresis principle, fine particulates can move to the place that temperature is low, thus prevents particle from depositing.
Have the following advantages according to the primary Ioops ooling channel tool of particle deposition in anti-liquid lead bismuth alloy provided by the invention:
(1) zone of heating be arranged on interior conduit outside surface give pipeline heating, thus between pipeline and cooling medium (LBE) formation temperature gradient, pipe temperature is higher than coolant temperature.Utilize thermophoresis principle, particle can move from the side that temperature is high to the side that temperature is low.So by thermophoretic forces, the particle being attached to inner-walls of duct can move to pipeline center, thus effectively prevents particle adventitious deposit in inner-walls of duct.
(2) simple according to the primary Ioops ooling channel structure of particle deposition in anti-liquid lead bismuth alloy provided by the invention, maintain easily.
Accompanying drawing explanation
Fig. 1 illustrates the primary Ioops ooling channel overall schematic of particle deposition in the anti-liquid lead bismuth alloy according to a kind of preferred implementation of the present invention;
Fig. 2 illustrates the primary Ioops ooling channel sectional view according to particle deposition in the anti-liquid lead bismuth alloy of a kind of preferred implementation of the present invention;
Fig. 3 illustrates the primary Ioops ooling channel zone of heating schematic diagram according to particle deposition in the anti-liquid lead bismuth alloy of a kind of preferred implementation of the present invention.
Drawing reference numeral illustrates:
1-primary Ioops interior conduit
2-zone of heating
3-a subgrade
4-b subgrade
5-c subgrade
Embodiment
Below by the present invention is described in detail by reference to the accompanying drawings, the features and advantages of the invention will illustrate along with these and become more clear, clear and definite.
Word " exemplary " special here means " as example, embodiment or illustrative ".Here need not be interpreted as being better than or being better than other embodiment as any embodiment illustrated by " exemplary ".Although the various aspects of embodiment shown in the drawings, unless otherwise indicated, accompanying drawing need not be drawn in proportion.
As depicted in figs. 1 and 2, the external diameter of involved primary Ioops interior conduit 1 is 730mm-750mm, and wall thickness is 60mm-70mm, be made up of two-phase austenitic stainless steel, this material has excellent corrosion resistance, stable work in work under High Temperature High Pressure, the feature of easy machine-shaping, good welding performance.
As shown in Figure 1, Figure 2 and Figure 3, involved zone of heating 2 is arranged on the outside surface of primary Ioops interior conduit 1, and its wall thickness is 80mm-100mm.Zone of heating 2 comprises a, b, c tri-subgrades of lamination, each subgrade thickness is all 20mm-35mm, and wherein a subgrade 3, c subgrade 5 are stainless steel layer, and b subgrade 4 is mica layer, and have heater coil to be clipped in mica layer, wherein heater coil be uniformly distributed, parallel arranged.The heating temp of zone of heating is 480 DEG C-500 DEG C, and for the heating temp ensureing zone of heating is 480 DEG C-500 DEG C, the heat coil number of turn of a kind of preferred implementation design of the present invention is 500 circles, circulating current 20A, heat production power 4400W.Huge pressure need not be born, so there do not have primary Ioops interior conduit 1 to require to material requirements to be high because a subgrade 3 and c subgrade 5 do not contact primary Ioops cooling medium.
Described zone of heating is hollow cylindrical, and inlaid-assembling is outside at primary Ioops interior conduit, relative sliding does not occur between thermosphere and primary Ioops interior conduit, zone of heating is wrapped in primary Ioops interior conduit outside surface, surface of contact can coat silica gel, not only anti-skidding, but also can exchange capability of heat be strengthened.
Described zone of heating, its inner structure is similar to anti-deposition pipe main body disclosed in this invention, and three subgrades are all hollow cylindrical, and inlaid-assembling together successively, a subgrade in penetralia, b subgrade at middle part, c subgrade is in most external, there is not relative sliding between three subgrades, install from innermost layer, at primary Ioops interior conduit structure-wall outside surface, coat silica gel, refill a subgrade, coat silica gel at a subgrade outside surface and refill b subgrade, coat silica gel at b subgrade outside surface and refill c subgrade.
The heating-up temperature of described zone of heating is 480 DEG C-500 DEG C, namely the heat coil heating temp in zone of heating set by b subgrade 4 is kept to be 480 DEG C-500 DEG C, temperature is delivered to primary Ioops interior conduit through a subgrade 3, the temperature of primary Ioops interior conduit is made to be elevated to 480 DEG C, higher than the temperature (less than 327 DEG C) of liquid lead bismuth alloy cooling medium, form bulk temperature gradient thus, utilize thermophoresis principle, in cooling medium, not molten fine particulates can move to the low side of temperature from the side that temperature is high, so fine particulates can move to the place that temperature is low under the effect of thermophoretic forces, namely particle moves from inner-walls of duct to pipeline center, thus prevent fine particulates to be deposited on primary coolant circuit pipe inwall.
Embodiment
The present invention is further described below by way of instantiation.
Embodiment 1
Produce the primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy, as shown in Figure 1, Figure 2 and Figure 3, wherein primary Ioops interior conduit is made up of two-phase austenitic stainless steel, and external diameter is 740mm, and wall thickness is 65mm; Zone of heating thickness is 90mm, zone of heating in three subgrades of dividing, a subgrade and c subgrade are all stainless steel layers, b subgrade is the mica layer being furnished with heat coil, the number of turn that wherein heat coil is wound around is 500 circles, circulating current 20A, heat production power 4400W, a subgrade thickness is 30mm, b subgrade thickness be 30mm, c subgrade thickness is 30mm.
Find through experiment: the anti-deposition of this pipeline is 10%, namely has the particle of 10% not deposit.
Embodiment 2
Produce the primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy similar to Example 1, wherein primary Ioops interior conduit external diameter is 730mm, and wall thickness is 60mm, zone of heating thickness is 80mm, a subgrade thickness is 20mm, b subgrade thickness be 25mm, c subgrade thickness is 35mm.
Find through experiment: the anti-deposition of this pipeline is 15%, namely has the particle of 15% not deposit.
Embodiment 3
Produce the primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy similar to Example 1, wherein primary Ioops interior conduit external diameter is 750mm, and wall thickness is 70mm, zone of heating thickness is 100mm, a subgrade thickness is 35mm, b subgrade thickness be 35mm, c subgrade thickness is 30mm.
Find through experiment: the anti-deposition of this pipeline is 8%, namely has the particle of 8% not deposit.
Embodiment 4
Produce the primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy similar to Example 1, wherein primary Ioops interior conduit external diameter is 750mm, and wall thickness is 60mm, zone of heating thickness is 90mm, a subgrade thickness is 35mm, b subgrade thickness be 30mm, c subgrade thickness is 25mm.
Find through experiment: the anti-deposition of this pipeline is 9%, namely has the particle of 9% not deposit.
Comparative example 1
Produce the primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy similar to Example 1, difference is only that primary Ioops interior conduit wall thickness is 80mm.
Find through experiment: the anti-deposition of this pipeline is 5%, namely has the particle of 5% not deposit.
Comparative example 2
Produce the primary Ioops ooling channel of the deposition of particle in anti-liquid lead bismuth alloy similar to Example 1, difference is only that zone of heating wall thickness is 100mm, and wherein a subgrade thickness is 45mm, b subgrade thickness be 30mm, c subgrade thickness is 25mm.
Find through experiment: the anti-deposition of this pipeline is 4%, namely has the particle of 4% not deposit
Comparative example 3
Produce pipeline similar to Example 1, difference is do not have zone of heating, only has primary Ioops interior conduit.
Find through experiment: the anti-deposition of this pipeline is 0, and namely without anti-deposition effect, particle is all deposited on pipeline.
Above-described embodiment and comparative example are all carry out under identical external condition, there is not the interference of external condition, and difference is only that the pipeline configuration chosen is different.
Experimentally found that: anti-deposition pipeline disclosed in this invention has obvious anti-deposition effect.
The less heat exchange property of primary Ioops interior conduit wall thickness is better, anti-deposition effect is better, in zone of heating, the less anti-deposition effect of a subgrade wall thickness is better, in order to ensure that pipeline has sufficiently high intensity, ensure the security in pipeline use, and consider material cost and practical problems, determine thickness range disclosed in this invention eventually.
Have the following advantages according to the primary Ioops ooling channel tool of particle deposition in anti-liquid lead bismuth alloy provided by the invention:
(1) zone of heating be arranged on interior conduit outside surface give pipeline heating, thus between pipeline and cooling medium (LBE) formation temperature gradient, pipe temperature is higher than coolant temperature.Utilize thermophoresis principle, particle can move from the side that temperature is high to the side that temperature is low.So by thermophoretic forces, the particle being attached to inner-walls of duct can move to pipeline center, thus effectively prevents particle adventitious deposit in inner-walls of duct.
(2) simple according to the primary Ioops ooling channel structure of particle deposition in anti-liquid lead bismuth alloy provided by the invention, maintain easily.
More than joint embodiment and exemplary example are to invention has been detailed description, but these explanations can not be interpreted as limitation of the present invention.It will be appreciated by those skilled in the art that when not departing from spirit and scope of the invention, can carry out multiple equivalencing, modification or improvement to technical solution of the present invention and embodiment thereof, these all fall within the scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (5)
1. the primary Ioops ooling channel that in anti-liquid lead bismuth alloy, particle deposits, is characterized in that, this pipeline comprises primary Ioops interior conduit (1) and its outer zone of heating (2) arranged,
Wherein the external diameter of primary Ioops interior conduit (1) is 730mm-750mm, and wall thickness is 60mm-70mm, is made up of two-phase austenitic stainless steel, primary Ioops interior conduit (1) internal circulation primary Ioops cooling medium (LBE),
Zone of heating (2) comprises a, b, c tri-subgrades from inside to outside successively, wherein a subgrade (3) and c subgrade (5) are stainless steel layer, b subgrade (4) is for being provided with the mica layer of heat coil, the wall thickness of zone of heating (2) is 80mm-100mm, wherein a subgrade (3) thickness is 20mm-35mm, b subgrade (4) thickness is 20mm-35mm, c subgrade (5) thickness is 20mm-35mm;
In described b subgrade (4), heater coil is parallel is wrapped in mica material, evenly distributed,
Gluedd joint by silica gel between primary Ioops interior conduit (1) and zone of heating (2),
Gluedd joint by silica gel between each subgrade in zone of heating (2), namely gluedd joint by silica gel between a subgrade (3) and b subgrade (4), gluedd joint by silica gel between b subgrade (4) and c subgrade (5).
2. the primary Ioops ooling channel that in anti-liquid lead bismuth alloy according to claim 1, particle deposits, it is characterized in that, the external diameter of primary Ioops interior conduit (1) is 735mm-745mm, and wall thickness is 62mm-66mm.
3. the primary Ioops ooling channel that in anti-liquid lead bismuth alloy according to claim 1, particle deposits, it is characterized in that, a subgrade (3) thickness is 25-35mm, b subgrade (4) thickness be 25-35mm, c subgrade (5) thickness is 25-30mm.
4. the primary Ioops ooling channel that in anti-liquid lead bismuth alloy according to claim 1, particle deposits, it is characterized in that, the heating-up temperature of described zone of heating (2) is 480-500 DEG C.
5. the primary Ioops ooling channel of particle deposition in the anti-liquid lead bismuth alloy according to claim 1 or 4, it is characterized in that, be 480-500 DEG C for making zone of heating (2) heating-up temperature, b subgrade is embedded with heater coil in (4), the number of turn of heater coil wraps is 500 circles, circulating current 20A, generation thermal power is 4400W.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310415444.7A CN103531257B (en) | 2013-09-12 | 2013-09-12 | The primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy |
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| CN201310415444.7A CN103531257B (en) | 2013-09-12 | 2013-09-12 | The primary Ioops ooling channel of particle deposition in anti-liquid lead bismuth alloy |
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| CN103531257A CN103531257A (en) | 2014-01-22 |
| CN103531257B true CN103531257B (en) | 2016-04-06 |
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| CN105045990B (en) * | 2015-07-09 | 2018-07-24 | 华北电力大学 | The measuring method of lead bismuth eutectic alloy physical properties of fluids parameter and use its simulation system |
| CN106875986B (en) * | 2017-03-22 | 2018-07-24 | 华北电力大学 | The anti-particulate matter precipitation equipment of reactor-loop under a kind of lead bismuth environment |
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| US6110844A (en) * | 1995-09-29 | 2000-08-29 | Sandia Corporation | Reduction of particle deposition on substrates using temperature gradient control |
| CN201541356U (en) * | 2009-11-20 | 2010-08-04 | 苏州国润电器有限公司 | Carbon fiber electrical heating ring |
| CN202143225U (en) * | 2011-07-06 | 2012-02-08 | 苏州泰升电热设备有限公司 | Hermetically sealed ceramic electric heating ring |
| CN102815538B (en) * | 2012-08-15 | 2016-08-03 | 华北电力大学 | A kind of powder that reduces prepares the device of deposition in course of conveying |
| CN203520892U (en) * | 2013-09-12 | 2014-04-02 | 华北电力大学 | Primary loop coolant pipeline for preventing deposition of particles in liquid lead bismuth alloy |
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