CN106558350B - A kind of inner fin heat exchanger - Google Patents
A kind of inner fin heat exchanger Download PDFInfo
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- CN106558350B CN106558350B CN201611052655.9A CN201611052655A CN106558350B CN 106558350 B CN106558350 B CN 106558350B CN 201611052655 A CN201611052655 A CN 201611052655A CN 106558350 B CN106558350 B CN 106558350B
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- heat exchanger
- shell
- tube
- heat
- inner casing
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
-
- 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 provides a kind of heat exchanger, the heat exchanger includes tube side side and shell side side, the tube side side includes inlet tube, inlet plenum, heating surface bank, outlet chamber and outlet, and the hot fluid enters inlet plenum from inlet tube, passes sequentially through heating surface bank, outlet chamber and outlet；The shell side side includes intake channel, inner casing, shell and outlet chamber, the cold fluid passes sequentially through space and the outlet chamber that intake channel, inner casing and shell limit, it is characterized in that, inner fin is set inside the heat exchanger tube, heat exchanger tube is divided into multiple passage aisles by the inner fin, intercommunicating pore is set on inner fin, so that adjacent passage aisle communicates with each other.The heat-exchanging tube bundle of present invention heat exchanger enhances heat exchange by setting inner fin, and balanced internal pressure, and by optimizing the structure of inner fin, meets the pressure and heat exchange needs of afterheat heat exchanger.
Description
Technical field
The invention belongs to field of heat exchangers, be related to a kind of shell-and-tube heat exchanger, more particularly to a kind of low flow resistance, close-coupled,
Residual heat removal heat exchanger with higher natural-circulation capacity and security.
Background technology
Residual heat removal heat exchanger is the heat exchange hinge of residual heat removal system, is to be related to the important of plurality of devices to set
It is standby, such as the safety of the reactor shutdown in nuclear reaction.At present, Generation Ⅲ and atomic marine plant generally use
Heat Discharging System of Chinese, further to improve inherent safety, this requires that the flow resistance of Residual heat removal cooler is as far as possible low
To improve natural circulation flow, atomic marine plant also requires that Residual heat removal cooler compact volume is small and arranged with saving heap cabin
Space.Most of existing Residual heat removal cooler is arranged in containment or heap cabin, and residual heat of nuclear core drains into final low-temperature receiver and also needed
To pass through a heat exchange again, such as the c-type Residual heat removal heat exchanger of the U.S. AP1000 nuclear power technologies used, be arranged in containment
In cooling water tank cooling water, cooling water evaporation could be by heat derives containment, some Residual heat removals in the condensation of containment shell wall
Cooler improves runner on the basis of traditional heat exchangers and flow adapts it to natural cycle system, still remains with shell-side, such as
" a kind of natural-circulation heat exchanger for supercritical water reactor Residual heat removal "（The patent No.：ZL201210301144.1）.
In addition, heat-exchanging tube bundle can cause heat-exchanging tube bundle internal pressure uneven in heat transfer process, cause fluid distrbution not
Uniformly, influence to exchange heat.
In view of the above-mentioned problems, the invention provides a kind of new heat exchanger, it is above-mentioned so as to solve the problems, such as.
The content of the invention
To achieve these goals, technical scheme is as follows：
A kind of heat exchanger, the heat exchanger include tube side side and shell side side, and the tube side side includes inlet tube, snout cavity
Room, heating surface bank, outlet chamber and outlet, the hot fluid enter inlet plenum from inlet tube, pass sequentially through heating surface bank,
Outlet chamber and outlet；The shell side side includes intake channel, inner casing, shell and outlet chamber, and the cold fluid is led to successively
Cross space and the outlet chamber that intake channel, inner casing and shell limit, it is characterised in that wing in being set inside the heat exchanger tube
Heat exchanger tube is divided into multiple passage aisles, intercommunicating pore is set on inner fin by piece, the inner fin so that adjacent passage aisle that
This connection.
Preferably, described intercommunicating pore is square structure, and along the flow direction of cooling agent, the square side
It is long constantly to reduce.
Preferably, along the flow direction of fluid, the amplitude of the continuous reduction of the length of side of the intercommunicating pore is continuously increased.
Preferably, the inner fin is multiple, inner fin stretches out from the central axis of pipe, the inwall with pipe
Connect, the angle between the inner fin is identical.
Preferably, described intercommunicating pore is square structure, in the case of the inner fin is 4, the pipe it is interior
A diameter of D, the length of side B of the intercommunicating pore, the distance between adjacent intercommunicating pore is S on the same fin, meets such as ShiShimonoseki
System：
S/D*10>=a-b*LN(B/D*10)；
Wherein a, b are parameters, 13<a<14,11<b<12;LN is logarithmic function；
0.2<S/D<0.7；Preferably 0.35-0.63;
0.2<B/D<0.3
2.5<D<10m；
0.7<B<2.1m。
Wherein, S is equal to the distance between adjacent intercommunicating pore center.
Preferably, inlet plenum, heating surface bank, outlet chamber are arranged in the space that inner casing and shell limit, it is described
Inner casing and shell are arcuation arrangements, the curved arrangement of described heating surface bank, the arc and inner casing of the heating surface bank, shell
Arc has the identical center of circle.
Preferably, described inner casing and shell are the inner casing and shell in heap cabin respectively, described hot fluid is that high temperature is anti-
The cooling agent of heap is answered, described cold fluid is cooling water.
Preferably, the exit passageway is higher than the position that intake channel is set, described inlet plenum compares outlet chamber
The position of setting is high.
Preferably, described intercommunicating pore is square structure, in the case of the inner fin is 4, the pipe it is interior
A diameter of D, the length of side B of the intercommunicating pore, the distance between adjacent intercommunicating pore is S on the same fin, described pipe
The arc length of the circular arc at place is H, and the chord length of the two-end-point of the circular arc where connecting is S, then needs to consider to hinder caused by bending
Power changes, then above-mentioned formula is changed into：
（S/D*10）*(S/H)c>=a-b*LN(B/D*10)；
Wherein c is parameter, 0.3<c<0.5.
Preferably, the radian wherein where circular arc is 45-75 degree.
Preferably, the metallic rod that the heating surface bank outer wall stretches out, the metal rod ends are pointed structures, from
The direction of the end of metallic rod described in heating surface bank outer wall case and the flow direction of cold fluid it is relative.
Preferably, the metallic rod is multiple, the distribution density M of metallic rod is as the function F apart from intake channel
（S）, i.e. M=F (S), on same root heat-exchanging tube bundle, F ' (S)>0, wherein F ' (S) is F（S）First order derivative.
Preferably, F " (S)>(S) is F for 0, wherein F "（S）Second derivative.
Preferably, function Fs of the distribution density M of metallic rod as height（H）, i.e. M=F (H), F ' (H)>0, wherein F '
(H) it is F（H）First order derivative.
Preferably, F " (H)>(H) is F for 0, wherein F "（H）Second derivative.
Preferably, orifice plate is set in exit passageway.
Preferably, described inlet tube and outlet are flexible pipe.
Compared with prior art, it is of the invention to have the following advantages：
1）By setting inner fin in pipe, heat exchange is enhanced, and balanced internal pressure, and by optimizing inner fin
Structure, meet afterheat heat exchanger pressure and heat exchange needs.
1）The heat-exchanging tube bundle of heat exchanger is arcuate structure, and has identical arcuate structure with inner casing and shell, can be with
Freely expanded with heat and contract with cold in the space of inner casing and shell.
2）It is pointed bar that end is set outside heat exchanger tube, on the one hand be able to can be broken in the flowing of biphase gas and liquid flow
Bad laminar sublayer, increase heat transfer area carries out augmentation of heat transfer, and because being bar, flow resistance is small, will not also increase shell side
Flow resistance, and by setting point, can prick a bubble, realize and expand gas-liquid interface and gas phase boundary and strengthen
Disturbance.
3）It is further to improve by setting metallic rod to change along the rule on fluid flow direction and short transverse
Heat transfer effect.
4）Residual heat removal cooler is arranged in containment or heap out of my cabin, is not take up containment or heap cabin arrangement space；
5）Residual heat removal cooler is immersed in cooling water large space, and residual heat of nuclear core, which is expelled to final low-temperature receiver, only to be needed once
Heat exchange, the path of Residual heat removal is substantially reduced, improves the speed of response；
6）Residual heat removal cooler is not provided with special shell side housing, but make use of containment or the inner casing in heap cabin and
Interlayer between shell, flow resistance is very low, substantially increases natural-circulation capacity.
7）The height and position of heat exchanger can adjust up and down in interlayer, not limited by the interference of other equipment pipeline in heap cabin
System, you can regulation tube side and shell side Cool Hot Core difference in height, so as to realize the natural-circulation capacity of tube side and shell side and heat-carrying capacity
Matching.
Brief description of the drawings
Fig. 1 is low flow resistance close-coupled Residual heat removal cooler schematic diagram；
Fig. 2 is the section schematic diagram for the heat-exchanging tube bundle for setting metallic rod；
Fig. 3 is the section schematic diagram for another heat-exchanging tube bundle for setting metallic rod；
Fig. 4 is the section schematic diagram for the heat exchanger tube for setting inner fin；
Fig. 5 is the floor map of heat-exchanging tube bundle expansion.
In figure：1- inlet tubes；2- inlet plenums；3- heating surface banks；4- outlet chamber；5- outlets；6- intake channels；
7- inner casings；8- shells；9- exit passageways；10- heaps cabin；11- low-temperature receivers.
3-1 metallic rods, 3-1-1 pointed structures, 3-1-2 sloping portions, horizontal component 3-1-3,3-2 inner fin, 3-3 are small logical
Road.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
Herein, if without specified otherwise, it is related to formula, "/" represents division, and "×", " * " represent multiplication.
As shown in figure 1, a kind of heat exchanger, the heat exchanger includes tube side side and shell side side, and the tube side side includes import
Pipe 1, inlet plenum 2, heating surface bank 3, outlet chamber 4 and outlet 5, the hot fluid enter inlet plenum 2 from inlet tube 1,
Pass sequentially through heating surface bank 3, outlet chamber 4 and outlet 5；The shell side side includes intake channel 6, inner casing 7, shell 8 and gone out
Mouth passage 9, the cold fluid pass sequentially through space and the exit passageway 9 that intake channel 6, inner casing 7 and shell 8 limit, snout cavity
Room 2, heating surface bank 3, outlet chamber 4 are arranged in the space that inner casing and shell limit, and the inner casing 7 and shell 8 are arcuation cloth
Put, described 3 curved arrangement of heating surface bank, arc and inner casing 7, the arc of shell 8 of the heating surface bank 3 have identical
The center of circle.
Set by the arcuation of above-mentioned phase concentric structure, and by inlet plenum 2 and outlet chamber 4 be arranged on inner casing and
In the arcuation space that shell is formed, the heating surface bank 3 can in the arcuation space that inner casing and shell are formed freely heat expansion
Shrinkage, therefore the applicable temperature range of heat-exchanging tube bundle and liquid scope are more extensive, have expanded the application of heat exchanger significantly.
Preferably, described inlet tube 1 and the part being connected with inlet plenum 2 and outlet chamber 4 of outlet 2
It is arranged in arcuation space, and preferably, the inlet tube 1 and outlet 2 are connected with inlet plenum 2 and outlet chamber 4
The part connect is flexible structure or elastic construction.
By setting flexible structure or elastic construction, can further facilitate heat-exchanging tube bundle 3 in arc space from
Stretched by ground.
Preferably, as shown in Fig. 2 metallic rod 3-1, the metallic rod 3-1 that the outer wall of the heating surface bank 3 stretches out
End is pointed structures 3-1-1, from the metallic rod 3-1 direction of end and the flowing of cold fluid described in the outer wall case of heating surface bank 3
Direction is relative.I.e. pointed structures head on against the next cold fluid of stream.The signified flow direction of arrow as shown in Figure 2.
Preferably, as shown in Fig. 2 the included angle A of the metallic rod 3-1 and the outside wall surface of heating surface bank 3 is 30-60 degree, enter
One step is preferably 40-45 degree.
Preferably, as shown in Fig. 2 the distance between adjacent tube center of heat-exchanging tube bundle is that heat-exchanging tube bundle outer tube is straight
1.7-2.5 times of footpath, the pointed structures 3-1-1 of metallic rod 3-1 end are preferred apart from the distance h of the outer tube wall of heat-exchanging tube bundle 3
For 0.4-0.6 times of outer tube diameter.
Pass through above-mentioned preferable angle and distance so that in the case of resistance is less, realize good heat transfer effect.
It is pointed bar that the outside of heat exchanger tube 3, which sets end, on the one hand be able to can be destroyed in the flowing of biphase gas and liquid flow
Laminar sublayer, and increase heat transfer area and carry out augmentation of heat transfer, and because being bar, flow resistance is small, will not also increase shell side
Flow resistance, and by setting point, the bubble in biphase gas and liquid flow can be punctured, realize expand gas-liquid interface and
Gas phase boundary simultaneously strengthens disturbance.Therefore by setting pointed bar, the coefficient of heat transfer of shell side side is greatly improved.
Preferably, the metallic rod 3-1 is multiple, metallic rod 3-1 distribution density M is as apart from intake channel 6
Function F（S）, i.e. M=F (S), on same root heat-exchanging tube bundle, F ' (S)>0, wherein F ' (S) is F（S）First order derivative.That is edge
The flow direction of cold fluid, described metallic rod 3-1 distribution density is increasing.Because along the flow direction of fluid,
The cooling fluid temperature more and more higher of shell side, the gas caused by biphase gas and liquid flow is also more and more, therefore by there is rule
The multiple pointed metallic rod 3-1 of setting of rule, the coefficient of heat transfer can be further improved, save material.It is found through experiments that, it is regular
Ground sets metallic rod 3-1 distribution density, by increasing capacitance it is possible to increase 20% or so heat exchange efficiency, and 5% or so stream can also be reduced
Dynamic resistance.
Preferably, F " (S)>(S) is F for 0, wherein F "（S）Second derivative.I.e. along the flow direction of cold fluid,
The amplitude that described metallic rod 3-1 distribution density is increasing constantly increases.Find in an experiment, the growth of gas is not
With the growth apart from line style, and in the growth of increase formula, therefore by setting above-mentioned rule to change, further improve and change
The thermal efficiency.
Preferably, metallic rod 3-1 is also arc structure.By being arranged such, ensure the flow direction phase with cold fluid
It is corresponding, improve flow-disturbing effect.
Preferably, metallic rod 3-1 include connection heat-exchanging tube bundle sloping portion 3-1-2 and with sloping portion 3-1-2 phases
Company and the parallel portion 3-1-3 parallel with heat-exchanging tube bundle.Described tip 3-1-1 is arranged on parallel portion 3-1-3 end.
Preferably, described parallel portion 3-1-3 metallic rods are arc structures, the circular arc where parallel portion 3-1-3
It is same with the center of circle where the circular arc of heat-exchanging tube bundle 3.
By setting parallel portion 3-1-3, the flow direction of tip 3-1-1 straight cutting cooling fluids can be made, improve heat exchange
Effect.
Preferably, as shown in figure 3, the included angle A of the sloping portion 3-1-2 and heat-exchanging tube bundle tube wall is 45-70 degree,
Preferably 55-60 degree.
Pass through above-mentioned preferable angle so that in the case of resistance is less, realize good heat transfer effect.
Preferably, the discharge of residual heat of nuclear core of the described heat exchanger applications in the heap cabin 10 in nuclear reactor.It is described
Inner casing and shell be respectively heap cabin 10 inner casing and shell, described hot fluid is the cooling agent of reactor, the cooling agent
Described cold fluid is cooling water.
Reactor coolant from reactor core, flow successively through the inlet tube 1 of Residual heat removal cooler tube side, the Room of snout cavity 2,
Heating surface bank 3, outlet chamber 4 and outlet 5, after the cooling water cooling in Residual heat removal cooler shell side interlayer, return to heap
Core.Cooling water flows successively through the intake channel 6, inner casing 7 and shell 8 of Residual heat removal cooler shell side from the bottom of low-temperature receiver 11
Interlayer, exit passageway 9 are put into, after the reactor coolant heating of Residual heat removal cooler tube side, flows upwardly into low-temperature receiver 11.
By being arranged in interlayer so that the height and position of heat exchanger can adjust up and down in interlayer, not by heap cabin 10
The interference limitation of other equipment pipeline, you can regulation tube side and shell side Cool Hot Core difference in height, so as to realize tube side and shell side from
The matching of right circulation ability and heat-carrying capacity.And by being arranged in interlayer, the space in heap cabin 10, waste heat can be made full use of
Discharge cooler shell side make use of mezzanine space between inner casing and shell, not increase extra equipment, pipeline, valve and attached
The structures such as part, the path of whole shell-side flow path is shorter, and section is wider, simple structure, has the characteristics of low flow resistance.
Preferably, the exit passageway 9 is higher than the position that intake channel 6 is set, described inlet plenum 2 compares outlet plenum
The position that room 4 is set is high.By above-mentioned setting, the tube side of heat exchanger and shell side establish natural circulation, constantly
Residual heat of nuclear core in heap cabin is expelled to low-temperature receiver.
Preferably, function Fs of the metallic rod 3-1 distribution density M as height（H）, i.e. M=F (H), F ' (H)>0, its
Middle F ' (H) is F（H）First order derivative.I.e. as the increase of height, described metallic rod 3-1 distribution densities are increasing.Because
With the increase of height, the gas in gas-liquid two-phase is more and more, therefore by increasing metallic rod 3-1 density, can be further
Metallic rod is distributed according to rule, improves the coefficient of heat transfer.It is found through experiments that, it is possible to increase 15%-18% or so heat transfer coefficients,
But also it can further reduce by 3% flow resistance.
Preferably, F " (H)>(H) is F for 0, wherein F "（H）Second derivative.I.e. with the increase of height, described gold
The increasing amplitude of category bar 3-1 distribution densities constantly increases.It is found through experiments that, with the increase of height, the increasing of bubble
It is not line style increase to add, but increasing degree more and more higher, therefore by setting, further improves also hot coefficient.
Preferably, orifice plate is set in exit passageway 9.By setting orifice plate, can be played when cooling down boiling water stream and
Suppress the effect flow backwards, keep two phase natural circulation flowing stable
Preferably, it is more circular heat exchanger tubes 3 that the heat-exchanging tube bundle, which is cross section,.
As shown in figure 4, the inside of heat exchanger tube 3 sets inner fin 3-2, the inner fin 3-2 to be divided into heat exchanger tube multiple
Passage aisle 3-3, intercommunicating pore 3-2-1 is set on inner fin, so that adjacent passage aisle 3-3 communicates with each other.
By setting inner fin 3-2, heat exchanger tube is divided into multiple passage aisle 3-3, further augmentation of heat transfer, but accordingly
The pressure increase of flow of fluid.By setting intercommunicating pore 3-2-1, ensure the connection between adjacent passage aisle 3-3, so that
Fluid in the big passage aisle of pressure can flow into the small passage aisle of neighbouring pressure, and the inside for solving condensation end is each small
The pressure of runner 26 is uneven and the problem of local pressure is excessive, so as to promote abundant flowing of the fluid in heat exchanger channels,
Simultaneously by the setting of intercommunicating pore, the pressure inside heat exchanger tube is also reduced, improves heat exchange efficiency.
Preferably, along the flow direction of cooling agent, the area of the intercommunicating pore is constantly reduced.
Described intercommunicating pore 3-2-1 is square structure, and along the flow direction of cooling agent, the square length of side is not
Disconnected reduction.
Preferably, the diameter parallel of the square diagonal and heat-exchanging tube bundle.
Along the flow direction of fluid, the fluid in heat exchanger tube constantly condenses, the gas in biphase gas and liquid flow also by
Gradually be condensed into liquid so that the pressure in heat exchanger tube constantly reduces, and because intercommunicating pore 3-2-1 presence so that heat
Pressure distribution inside pipe is more and more uniform, therefore the area of intercommunicating pore need not be very big, is constantly reduced by setting, so as to
So that in the case where ensureing the uniform pressure of inside heat pipe pressure, increase heat exchange area by connecting the reduction of hole area,
So as to improve heat exchange efficiency.
Preferably, constantly increase along the flow direction of fluid, the amplitude of the continuous reduction of area of the intercommunicating pore 3-2-1
Add.By being arranged such, and meet the changing rule of flowing pressure, while further reducing flow resistance, improve heat exchange
Efficiency.By being arranged such, by being that experiment finds that 10% or so heat exchange efficiency can be improved, while resistance is kept not substantially
Become.
Preferably, along the flow direction of fluid, the distributed quantity of intercommunicating pore is fewer and fewer, further preferably, the company
The amplitude of 16 continuous reduction of number of openings is continuously increased.
Principle is reduced by the Distribution Principle of above-mentioned quantity and area identical, area is reduced by distributed number less.
Preferably, intercommunicating pore 3-2-1 is shaped as circle.
Preferably, the inner fin 3-2 is multiple that inner fin 3-2 stretches out from the central axis of pipe, with pipe
Inwall connects, and the angle between the inner fin 3-2 is identical.It is identical by the angle between inner fin, heat exchanger tube can be caused
Internal flow distribution keeps uniform, and pressure distribution is also kept in balance accordingly.
Preferably, the inner fin 3-2 is 4, as shown in Figure 4.Angle between the inner fin is 90 °.
Found in actual experiment, intercommunicating pore 3-2-1 area can not be too small, and the increasing of flow resistance can be caused if too small
Add, and intercommunicating pore 3-2-1 minimum area is relevant with pipe caliber, and in general is that caliber is bigger, then connects hole area just
What can be designed is smaller, and caliber is smaller, and intercommunicating pore 3-2-1 area can design bigger, therefore intercommunicating pore 3-2-1 and pipe
The distance between caliber and its adjacent intercommunicating pore 3-2-1 must be fulfilled for necessarily requiring, it is excessive otherwise to may result in flow resistance.
In the case of the inner fin is 4, the interior diameter of the pipe is D, the length of side B of the square intercommunicating pore, institute
It is S to state the distance between intercommunicating pore adjacent on same fin, meets following relation：
S/D*10>=a-b*LN(B/D*10)；
Wherein a, b are parameters, 13<a<14,11<b<12;LN is logarithmic function；
0.2<S/D<0.7；Preferably 0.35-0.63;
0.2<B/D<0.3
2.5<D<10m；
0.7<B<2.1m。
Wherein, S is equal to the distance between adjacent intercommunicating pore 3-2-1 centers.Left and right as shown in Figure 4,5 is adjacent and phase up and down
The distance between adjacent intercommunicating pore center.
Further preferably, 10<S<45mm.
Preferably, as B/D increase, described a, c increase, b reduce.
Preferably, S/D*10=- b*LN (B/D*10).
Now heat transfer effect reaches optimal, and flow resistance meets to require just.
If heat-exchanging tube bundle is arcuation, such as shown in figure 1, the arc length of the circular arc where described pipe is H, connects institute
The chord length of two-end-point of circular arc be S, then need to consider to bend caused by resistance change, then above-mentioned formula is changed into：
（S/D*10）*(S/H)c>=a-b*LN(B/D*10)；
Wherein c is parameter, 0.3<c<0.5;Further preferably, 0.38<c<0.41；Radian wherein where circular arc is 45-
75 degree, more preferably 50-60 degree.Above-mentioned degree is all angle.
Other parameter selections keep constant.
Preferably,（S/D*10）*(S/H)c>=a-b*LN (B/D*10), now heat transfer effect reach optimal, flowing resistance
Power meets to require just.
Preferably, as shown in Figure 4,5, multiple rows of intercommunicating pore 3-2-1, the multiple intercommunicating pore 3- are set on each inner fin
2-1 could be arranged to wrong row's structure.By mistake, row connects structure, can further improve heat exchange, reduces pressure.
As the application in being cooled down in nuclear reaction, as shown in figure 1, low flow resistance close-coupled Residual heat removal cooler shell side is interior
Shell 7 is that external diameter φ 18m are columnar structured, and shell 8 is also columnar structured for internal diameter φ 20m, between the two in the presence of about 1m one wide
Annular gap, interlayer bottom sets internal diameter φ 0.8m circular inlet port passages 6, and interlayer top is provided with internal diameter φ 0.8m circles and gone out
Mouth passage 9, interlayer are connected by intake channel 6 and exit passageway 9 with the space of low-temperature receiver 11, are full of cooling water in interlayer.Low stream
Heating surface bank 3, inlet plenum 2 and the outlet chamber 4 of resistance close-coupled Residual heat removal cooler tube side are immersed in the cooling in interlayer
In water, the heat-transfer pipe that heating surface bank 3 is about 11m by 100 φ 20mm, average length forms in circular arc arrangement, the He of inlet tube 1
The internal diameter φ 0.25m of outlet 5 pipe, is connected through inner casing 7 and with reactor core.
As shown in figure 1, in tube side, pyroreaction reactor coolant flows into inlet plenum 2 through inlet tube 1, then branches to 100
In heat-transfer pipe, water cooling is cooled down by shell side, the low-temp reaction reactor coolant after cooling imports outlet chamber 4, then is returned through outlet 5
Return reactor core, in the process heat-transfer pipe be heated elongation strain, but thermal stress because the circular arc arrangement of heating surface bank 3 be able to from
It is dynamic to eliminate.In shell side, cooling water is flowed up by reactor coolant heat temperature raising, and the top of low-temperature receiver 11 is discharged into through exit passageway 9,
And the low-temperature cooling water of the bottom of low-temperature receiver 11 also constantly sucks interlayer from intake channel 6, because Residual heat removal cooler shell side leads to
Road simple structure has the less feature of resistance, therefore forms the lasting natural circulation of larger flow.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, it can make various changes or modifications, therefore protection scope of the present invention should
It is defined when by claim limited range.
Claims (5)
1. a kind of heat exchanger of the discharge for the residual heat of nuclear core being used in the heap cabin in nuclear reactor, the heat exchanger include tube side side
With shell side side, the tube side side includes inlet tube, inlet plenum, heating surface bank, outlet chamber and outlet, and hot fluid is from import
Pipe enters inlet plenum, passes sequentially through heating surface bank, outlet chamber and outlet；The shell side side include intake channel, inner casing,
Shell and exit passageway, cold fluid pass sequentially through intake channel, the space of inner casing and shell restriction and exit passageway, its feature and existed
In the heating surface bank includes heat exchanger tube, sets inner fin inside the heat exchanger tube, heat exchanger tube is divided into multiple by the inner fin
Passage aisle, intercommunicating pore is set on inner fin, so that adjacent passage aisle communicates with each other；
Inlet plenum, heating surface bank and outlet chamber are arranged in the space that inner casing and shell limit, and the inner casing and shell are
Arcuation arranges that the curved arrangement of described heating surface bank, arc and inner casing, the arc of shell of the heating surface bank have identical
The center of circle；
Described inner casing and shell are the inner casing and shell in heap cabin respectively, and described hot fluid is the cooling agent of high-temperature reactor,
Described cold fluid is cooling water；
Described inlet tube and the part being connected with inlet plenum and outlet chamber of outlet are also disposed at inner casing and shell
In the arcuation space of restriction, the part that the inlet tube and outlet are connected with inlet plenum and outlet chamber is flexible structure
Or elastic construction.
2. heat exchanger as claimed in claim 1, it is characterised in that described intercommunicating pore is square structure, along cooling agent
Flow direction, the square length of side constantly reduces.
3. heat exchanger as claimed in claim 1, it is characterised in that the heat exchanger tube is pipe, and the inner fin is interior to be multiple
Fin stretches out from the central axis of pipe, is connected with the inwall of pipe, and the angle between the inner fin is identical.
4. heat exchanger as claimed in claim 1, it is characterised in that the exit passageway is higher than the position that intake channel is set,
Described inlet plenum is higher than the position that outlet chamber is set.
5. heat exchanger as claimed in claim 1, it is characterised in that the radian wherein where circular arc is 45-75 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611052655.9A CN106558350B (en) | 2016-11-25 | 2016-11-25 | A kind of inner fin heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611052655.9A CN106558350B (en) | 2016-11-25 | 2016-11-25 | A kind of inner fin heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106558350A CN106558350A (en) | 2017-04-05 |
| CN106558350B true CN106558350B (en) | 2017-11-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3935063A (en) * | 1973-11-28 | 1976-01-27 | The United States Of America As Represented By The United States Energy Research And Development Administration | Emergency heat removal system for a nuclear reactor |
| CN201196538Y (en) * | 2008-03-27 | 2009-02-18 | 董泗清 | Air-water, water-water two-phase integral heat exchanger |
| CN202630743U (en) * | 2012-06-11 | 2012-12-26 | 柳州展维热工科技有限公司 | High-efficiency energy-saving heat exchanger |
| CN103632737A (en) * | 2012-08-20 | 2014-03-12 | 中国核动力研究设计院 | Passive waste heat discharge system of nuclear power station steam generator secondary side |
| CN202948740U (en) * | 2012-12-21 | 2013-05-22 | 华北电力大学 | AP1000 passive afterheat discharge heat exchanger of nuclear power plant |
| CN103996419A (en) * | 2014-05-20 | 2014-08-20 | 中国科学院上海应用物理研究所 | Molten salt reactor waste heat cooling device and method thereof |
| CN105605945B (en) * | 2015-12-30 | 2017-07-28 | 于仁麟 | A kind of different triangle through hole heat exchanger of base length |
| CN205332884U (en) * | 2015-12-31 | 2016-06-22 | 无锡辉腾科技有限公司 | Novel finned heat exchanger |
| CN205448792U (en) * | 2015-12-31 | 2016-08-10 | 无锡辉腾科技有限公司 | Take finned heat exchanger of U type fin |
| CN105674784B (en) * | 2016-02-29 | 2017-05-10 | 刘阳河 | H-shaped heat exchange pipe |
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