CN202487183U - Floating-head type lead bismuth heat exchange device - Google Patents
Floating-head type lead bismuth heat exchange device Download PDFInfo
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- CN202487183U CN202487183U CN2012200380469U CN201220038046U CN202487183U CN 202487183 U CN202487183 U CN 202487183U CN 2012200380469 U CN2012200380469 U CN 2012200380469U CN 201220038046 U CN201220038046 U CN 201220038046U CN 202487183 U CN202487183 U CN 202487183U
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- floating head
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- heat exchange
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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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Abstract
The utility model discloses a floating-head type lead bismuth heat exchange device which belongs to the field of nuclear energy heat exchange equipment. The floating-head type lead bismuth heat exchange device is a device which is capable of achieving flow heat transfer on both sides. An upper seal head is connected with the upper end of a cylindrical steel tube shell which is made of a steel plate by surrounding, and a floating head shell body of a floating head is fixed on the lower end of the cylindrical steel tube shell. A primary side heat exchange tube is supported on a floating tube plate which is placed inside the cylindrical steel tube shell, a secondary side coolant heat transfer shell body is fixed on the inner wall of the cylindrical steel tube shell, and consequently an interlayer heat exchange passage is formed. A reverse-flow heat exchange method or a cocurrent heat exchange method can be adopted, wherein side lead bismuth alloy fluid passes through a primary side heat exchange channel, and cooling water passes through an interlayer heat exchange channel. Through heat exchange of the lead bismuth alloy fluid and coolants, heat generated by an accelerator driven sub-critical system (ADS) reactor is taken away. The floating-head type lead bismuth heat exchange device is provided with the floating head and has the advantages of avoiding stress expansion due to difference in temperature, having high heat transfer efficiency and good heat transfer performance, being compact in structure and capable of enduring the big difference in temperature, having few limits for the coolants, and the like.
Description
Technical field
The utility model belongs to nuclear energy heat-exchange apparatus field, the plumbous bismuth heat-exchanger rig of particularly a kind of floating head type.Specifically, comprising two kinds of heat transfer flow modes of forced circulation and Natural Circulation specifically, is a kind of device of realizing flowing heat transfer at bilateral.Lead bismuth alloy by flowing in the plumbous bismuth heat-exchanger rig tube side passes to shell side flowing coolant water, and takes away heat by coolant water, accomplishes a circulation, takes away the heat that produces at the ADS subcritical reactor thus, to guarantee the normal safe operation of ADS system.
Background technology
Accelerator drive system ADS (accelerate driven system) is a kind of transmuting of nuclear waste efficiently technology.Its composition is: middle ability high current proton precessional magnetometer; Outer source neutron produces target; Subcritical reactor.Because what the ADS system coolant adopted is the lead bismuth alloy fluid, therefore, derives the heat that it has effectively.At present, also do not build up the ADS reactor in the world, loop research is abroad just experimentizing.No matter be the shell and tube Intermediate Heat Exchanger that European Experiment Test Accelerator drive system (XADS) is adopted; Or Italian CIRCE tube-sheet heat exchanger; The thimble tube heat interchanger that also has Italian NACIE Natural Circulation experimental loop design; Have a mind to big Libiee's Sa university again and adopt the steel flight to strengthen turbulent flow coaxial sleeve heat interchanger; Add the single casing type heat exchanging of the TALL of Sweden KTH (KTH) at last, most of double-pipe exchanger that adopts.Recycle design is mainly taked forced circulation, and Natural Circulation also more and more obtains paying attention to.Domestic present ADS research is at the early-stage, is carrying out plumbous bismuth experimental loop design studies.Wherein heat-exchanger rig is a very important link, and the realization that is directly connected to experimental loop moves successfully.
Double-pipe exchanger is as a kind of heat transmission equipment commonly used, and its advantage is simple in structure, is applicable to high-temperature, high pressure fluid, particularly the heat transfer of low capacity fluid.Major defect is that resistance to flow is big, and metal wastage is many, and volume is big, and floor area is big, so be used for the little heat interchanger of heat transfer area.In addition, when needs are taken away by the big entrained heat of flow of lead bismuth alloy, just need to surpass 10 meters high pipelines, processing and manufacturing is difficulty relatively.
Shell-and-tube heat exchanger is with its adaptability to temperature, pressure, medium, and durability and economy are occupied 70% leading position all the time in heat transmission equipment.Therefore the standardization effort of shell-and-tube heat exchanger is paid attention to by a plurality of industrially developed country in the world, is also paid attention to by ISO ISO (International Standards Organization).Shell-and-tube heat exchanger mainly contains fixed tube sheet type, U type tubular type and movable tube sheets heat exchanger.To the defective of fixed tube sheet type and U type tubular type, floating head type has been done structural improvement, and it is dead that the two ends tube sheet has only an end and shell to fix, and the other end is the housing slippage relatively, is called floating head.The thermal expansion of this heat exchanger shell and tube bank is freely; Can not produce advantages such as thermal (temperature difference) stress, and detachable extraction tube bank, heat exchanger tube is changed in maintenance, cleaning is restrained and the shell side dirt is convenient; Therefore; Movable tube sheets heat exchanger is used the most extensive, and in oil field collection dress storing and transporting system, 60%～70% heat interchanger is a movable tube sheets heat exchanger.Consider that the plumbous bismuth heat-exchanger rig end temperature difference is bigger; Have the bigger swelling pressure, and need take away the big entrained heat of flow of lead bismuth alloy, for better, more safely realizing effective transmission of heat; Just must design a kind of heat transfer unit (HTU), to adapt to the basic demand of ADS system better.
The utility model content
The purpose of the utility model is to be directed against prior art middle sleeve formula heat interchanger as a kind of heat transmission equipment commonly used, and its advantage is simple in structure, is applicable to high-temperature, high pressure fluid, particularly the heat transfer of low capacity fluid.Major defect is that resistance to flow is big, and metal wastage is many, and volume is big, and floor area is big, so be used for the little heat interchanger of heat transfer area.In addition; When needs are taken away by the big entrained heat of flow of lead bismuth alloy; Just need to surpass 10 meters high pipelines, processing and manufacturing relatively difficulty deficiency and provide a kind of floating head type plumbous bismuth heat-exchanger rig, it is characterized in that; This device is a kind ofly to carry out the device of flowing heat transfer at bilateral, has two kinds of flowing heat transfer modes of forced circulation and Natural Circulation;
The structure of the plumbous bismuth heat-exchanger rig of said floating head type is following: cylindrical steel shell 10 upper ends in that steel plate is bundled into connect upper cover 11; Upper cover 11 tops are the fixing secondary side coolant outlet 9 in primary side lead bismuth alloy fluid inlet 6, cylindrical steel shell 10 epimere sides fixedly; Cylindrical steel shell 10 hypomere sides are secondary side coolant water inlet 8 fixedly; Primary side heat exchanger tube 2 is supported on the floating tubesheet 15 in the cylindrical steel shell 10; Secondary side cooling medium heat exchange shell 4 is fixed on cylindrical steel shell 10 inwalls, forms the interlayer heat exchanger channels; The floating head housing of floating head 5 is fixed on cylindrical steel shell 10 lower ends, and primary side lead bismuth alloy fluid egress point 7 is fixed on the end central authorities of floating head housing 16.
The structure of said floating head is fixed on Floating Head Flange 12 tops for floating tubesheet 15 in floating head housing 16, and floating head 13 is fixed on Floating Head Flange 12 bottoms; Floating Head Flange 12 is not fixedly connected with floating head housing 16; Form floating head sliding space 14 between floating head 13 and the floating head housing 16.
Said cylindrical steel shell is flange with floating head housing 16 and upper cover 11 and is connected.
The arrangement mode of said primary side floating head heat exchanger tube on floating tubesheet is that arrangement angles is 30 ° equilateral triangle A, the corner equilateral triangle B that arrangement angles is 60 °, the square C that arrangement angles is 90 °, D arrangement of corner square or the concentric circles arrangement E that arrangement angles is 45 °; These arrangement modes use separately or combination is used.
Flowing of said lead bismuth alloy heat-exchanger rig two side liquids promptly can increase pumping unit in circuit system, make its forced circulation fluid interchange, also can in circuit system, not increase pumping unit, makes its Natural Circulation heat exchange, two kinds of heat transfer flow modes; Both sides fluid interchange form can be identical, also can be also different.
The floating head of said heat-exchanger rig moves up and down in the floating head sliding space, effectively prevents because the temperature difference brings stress to expand.
Said lead bismuth alloy heat-exchanger rig mechanical part material is aluminium alloy, austenitic steel or stupalith.
Said heat-exchanger rig is taked vertical layout or is taked horizontal layout.
Said fluid interchange is a counter-flow heat exchange, and promptly the lead bismuth alloy flow direction is opposite with secondary side coolant water flow direction, than adopting the downflow type heat exchange to bring higher heat transfer efficiency.
The beneficial effect of the utility model is this device owing to be provided with floating head, has to prevent because the characteristics that the temperature difference brings stress to expand.Characteristics such as this device has compact conformation, and heat exchange property is good, and the coolant temperature restriction is few realize promoting easily.The heat exchanger tube arrangement mode considers that the stress requirement is uniformly distributed with, compactness; And consider to clean and integrally-built requirement; Compare the heat transfer coefficient height with square arrangement, can save 15% tube sheet area, be applicable to and do not give birth to dirt or available chemical cleaning fouling and the higher operating mode of allowable pressure drop.
Description of drawings
Fig. 1 is the plumbous bismuth heat-exchanger rig of an a kind of floating head type synoptic diagram.
Fig. 2 is a pipeline of floating-head heat exchanger bundle arrangement mode synoptic diagram.
Fig. 3 is a movable tube sheets heat exchanger floating head sectional side view.
Embodiment
The utility model provides a kind of floating head type plumbous bismuth heat-exchanger rig.This lead bismuth alloy heat-exchanger rig mechanical part adopts aluminium alloy, austenitic steel or ceramic material, and the interior diameter of primary side floating head heat exchanger tube is 10mm-60mm; Cylindrical steel shell diameter of the housing is 100mm-600mm, and wall thickness is 1-6mm, length is 1m-6m.Heat-exchanger rig is taked vertical layout or is taked horizontal layout all can.Explain below in conjunction with accompanying drawing.
Fig. 1 is the plumbous bismuth heat-exchanger rig of a floating head type synoptic diagram.Among the figure; Adopt flange to connect upper cover 11 in cylindrical steel shell 10 upper ends that steel plate is bundled into; Upper cover 11 tops are the fixing secondary side coolant outlet 9 in primary side lead bismuth alloy fluid inlet 6, cylindrical steel shell 10 epimere sides fixedly, and cylindrical steel shell 10 hypomere sides are secondary side coolant water inlet 8 fixedly, and primary side heat exchanger tube 2 is supported on the floating tubesheet 15 in the cylindrical steel shell 10; Secondary side cooling medium heat exchange housing 4 is fixed on cylindrical steel shell 10 inwalls, forms the interlayer heat exchanger channels; The floating head housing 16 of floating head 5 adopts flanges to be fixed on cylindrical steel shell 10 lower ends, and primary side lead bismuth alloy fluid egress point 7 is fixed on the end central authorities of floating head housing 16.In floating head housing 16, floating tubesheet 15 is fixed on Floating Head Flange 12 tops, and floating head 13 is fixed on Floating Head Flange 12 bottoms; Between floating head 13 and floating head housing 16, form floating head 5 sliding spaces 14, Floating Head Flange 12 is not fixedly connected with floating head housing 16, makes floating head 5 in floating head sliding space 14, move up and down (as shown in Figure 3); Therefore the thermal expansion of tube bank does not receive the constraint of housing, can effectively not prevent to avoid the accident potential of expanding and producing owing to stress because the temperature difference brings stress to expand because of differential expansion produces thermal stress between housing and the tube bank.
The corner square D that the arrangement mode of above-mentioned primary side heat exchanger tube 2 on floating tubesheet 15 is arrangement angles is 30 ° equilateral triangle A, corner equilateral triangle B that arrangement angles is 60 °, arrangement angles is 90 ° square C, arrangement angles is 45 ° arranges and concentric circles is arranged (as shown in Figure 2) such as E; These arrangement modes can independent a kind of use; Also can two or more combinations use these arrangement modes to consider that the stress requirement is uniformly distributed with, compactness; And consider to clean and integrally-built requirement; Compare the heat transfer coefficient height with square arrangement, can save 15% tube sheet area, be applicable to and do not give birth to dirt or available chemical cleaning fouling and the higher operating mode of allowable pressure drop.
Flowing of said lead bismuth alloy heat-exchanger rig two side liquids promptly can be to rely on the pump in the loop to make its forced circulation fluid interchange, also can not rely on pump, and it is the Natural Circulation heat exchange for the density official post through fluid self, two kinds of heat transfer flow modes; Both sides fluid interchange form can be identical, also can be also different.
The heat-exchange method of the plumbous bismuth heat-exchanger rig of said floating head type, heat transfer process is following: lead bismuth alloy fluid 1 flows into from primary side lead bismuth alloy fluid inlet 6; Carry out fluid interchange through primary side heat exchanger tube 2 and flowing coolant water 3 in secondary side coolant water inlet 8 inflow secondary side cooling medium heat exchange housings 4; Then, the lead bismuth alloy fluid 1 after the heat exchange flows out from primary side lead bismuth alloy fluid egress point 7, and the coolant water 3 after the heat exchange flows out from secondary side coolant outlet 9; Floating head moves up and down according to the difference of the temperature difference, realizes that thus will produce heat from the ADS system derives, and accomplishes a circulation.
The fluid interchange of this device is a counter-flow heat exchange, and promptly the lead bismuth alloy flow direction is opposite with secondary side coolant water flow direction, than adopting the downflow type heat exchange to bring higher heat transfer efficiency.
Claims (6)
1. the plumbous bismuth heat-exchanger rig of a floating head type; It is characterized in that; This device is a kind of device that carries out flowing heat transfer at bilateral of taking vertical layout or taking horizontal layout; The structure of the plumbous bismuth heat-exchanger rig of said floating head type is following: cylindrical steel shell (10) upper end that is bundled at steel plate connects upper cover (11); Upper cover (11) top is the fixing secondary side coolant outlet (9) in primary side lead bismuth alloy fluid inlet (6), cylindrical steel shell (10) epimere side fixedly, and cylindrical steel shell (10) hypomere side is secondary side coolant water inlet (8) fixedly, and primary side heat exchanger tube (2) is supported on the floating tubesheet (15) in the cylindrical steel shell (10); Secondary side cooling medium heat exchange housing (4) is fixed on cylindrical steel shell (10) inwall, forms the interlayer heat exchanger channels; The floating head housing of floating head (5) is fixed on cylindrical steel shell (10) lower end, and primary side lead bismuth alloy fluid egress point (7) is fixed on the end central authorities of floating head housing (16).
2. according to the plumbous bismuth heat-exchanger rig of the said a kind of floating head type of claim 1, it is characterized in that the structure of said floating head is fixed on Floating Head Flange (12) top for floating tubesheet (15) in floating head housing (16), floating head (13) is fixed on Floating Head Flange (12) bottom; Floating Head Flange (12) is not fixedly connected with floating head housing (16); Form floating head sliding space (14) between floating head (13) and the floating head housing (16).
3. according to the plumbous bismuth heat-exchanger rig of the said a kind of floating head type of claim 1, it is characterized in that said cylindrical steel shell is flange with floating head housing (16) and upper cover (11) and is connected.
4. according to the plumbous bismuth heat-exchanger rig of the said a kind of floating head type of claim 1; It is characterized in that the arrangement of said primary side heat exchanger tube on floating tubesheet arranged according to arrangement angles is 30 ° equilateral triangle (A), corner equilateral triangle (B) that arrangement angles is 60 °, arrangement angles is 90 ° square (C), corner square (D) that arrangement angles is 45 ° or the mode of concentric circles (E) is arranged; These arrangement modes use separately or combination is used.
5. according to the plumbous bismuth heat-exchanger rig of the said a kind of floating head type of claim 1, it is characterized in that the floating head of said heat-exchanger rig moves up and down in the floating head sliding space, effectively prevent because the temperature difference brings stress to expand.
6. according to the plumbous bismuth heat-exchanger rig of the said a kind of floating head type of claim 1, it is characterized in that said lead bismuth alloy heat-exchanger rig mechanical part material is aluminium alloy, austenitic steel or stupalith.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200380469U CN202487183U (en) | 2012-02-07 | 2012-02-07 | Floating-head type lead bismuth heat exchange device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200380469U CN202487183U (en) | 2012-02-07 | 2012-02-07 | Floating-head type lead bismuth heat exchange device |
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| Publication Number | Publication Date |
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| CN202487183U true CN202487183U (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200380469U Expired - Fee Related CN202487183U (en) | 2012-02-07 | 2012-02-07 | Floating-head type lead bismuth heat exchange device |
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| CN (1) | CN202487183U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165200A (en) * | 2013-01-14 | 2013-06-19 | 上海核工程研究设计院 | Decay heat removal system of reactor |
| CN108518663A (en) * | 2018-03-30 | 2018-09-11 | 清华大学天津高端装备研究院 | A kind of steam generator and nuclear equipment suitable for lead bismuth heap |
-
2012
- 2012-02-07 CN CN2012200380469U patent/CN202487183U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165200A (en) * | 2013-01-14 | 2013-06-19 | 上海核工程研究设计院 | Decay heat removal system of reactor |
| CN103165200B (en) * | 2013-01-14 | 2016-01-27 | 上海核工程研究设计院 | A kind of decay heat removal system of reactor |
| CN108518663A (en) * | 2018-03-30 | 2018-09-11 | 清华大学天津高端装备研究院 | A kind of steam generator and nuclear equipment suitable for lead bismuth heap |
| CN108518663B (en) * | 2018-03-30 | 2019-10-29 | 清华大学天津高端装备研究院 | A kind of steam generator and nuclear equipment suitable for lead bismuth heap |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20150207 |
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| EXPY | Termination of patent right or utility model |