CN109539826A - A kind of shell-and-tube heat exchanger of fin height variation - Google Patents
A kind of shell-and-tube heat exchanger of fin height variation Download PDFInfo
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- CN109539826A CN109539826A CN201810806188.7A CN201810806188A CN109539826A CN 109539826 A CN109539826 A CN 109539826A CN 201810806188 A CN201810806188 A CN 201810806188A CN 109539826 A CN109539826 A CN 109539826A
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- heat exchanger
- tube
- heat
- fin
- exchanger tube
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/02—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by influencing fluid boundary
Abstract
The present invention provides a kind of shell-and-tube heat exchanger for generating steam, the heat exchanger includes upper lower collector pipe and the heat exchanger tube that is arranged between upper lower collector pipe；The heat exchanger includes inlet tube and outlet, the inlet tube is arranged in lower collector pipe, outlet is arranged on upper header, the heat exchanger includes heat source import and thermal source outlet, heat source enters from heat source import, it exchanges heat with the fluid in heat exchanger tube, then it is flowed out from thermal source outlet, fluid in heat exchanger tube is heated into steam, it is flowed out from outlet, in the external of tube wall of heat exchanger tube, fin is set, the fin setting is horizontally, the fin is straight panel shape, the in-plane of fin along heat source flow direction, along the flow direction of heat exchange tube fluid, fin height constantly increases.The present invention provides a kind of new-type shell-and-tube vapor heat exchanger, because internal-external temperature difference difference is smaller and smaller with the flowing of flowing, heat absorption capacity worse and worse, by increase fin height, to increase the heat exchange area of fin, to increase caloric receptivity, so that caloric receptivity on the whole reaches homogenization.
Description
Technical field
The present invention relates to heat exchangers, more particularly, to a kind of shell-and-tube heat exchanger.
Background technique
Stream-liquid two-phase flow heat exchange is universally present in various heat-exchanger rigs, and stream-liquid two-phase flow is in heat transfer process because of vapour
The presence of phase, it is low to will lead to heat exchange efficiency, deteriorates heat exchange, process fluid flow is unstable, and will lead to the hair of water hammer
It is raw.When the phase of two-phase working substance is without uniformly mixing and discontinuous flowing, large-sized liquid group can occupy air mass at high speed
Space causes two-phase flow unstable, so that tempestuously impact device and pipeline, generates sharp pounding and noise, seriously prestige
Coerce equipment operational safety.
The present inventor also devises a variety of heat exchanger apparatus to solve the above problems, such as multitube in applying in front,
But such device is found in operation, because being to be closely linked between pipe, is formed between three root canals
Space A is relatively small, because the convex arc that space A is three root canals is formed, most of area stenosis of space A be will cause
Fluid is difficult to enter through, and causes fluid short, to affect the heat exchange of fluid, can not play the role of good current stabilization.Together
More root canal subgroups of Shi Yinwei above structure are combined, and manufacture is difficult.Such as 2017102671998 structures again, although the knot
Structure solves fluid short phenomenon, but there are problems that circulation area is substantially reduced, and leads to the increase of flow resistance.Example again
Such as 2017103224953 annular and separation device, separating device uses ring structure in ring structure, causes to separate dress on the whole
It sets annular space to separate in the circumferential unevenly, and because there are ring structures, so that the position of four angles of annular space occurs
Acute angle less than 90 degree, this, which will lead to, has fluid flowing short circuit in the acute angle portion less than 90 degree.
In normal design of heat exchanger, heat exchanger tube outside fin height is essentially identical, does not account for the situation change that specifically exchanges heat
The variation of fin caused by changing.
In view of the above-mentioned problems, the present invention is improved on the basis of invention in front, provides a kind of new generation and steam
The heat exchanger of vapour, to solve the non-uniform heat transfer problem of existing current stabilization in the case where heat exchanger tube heat exchange.So that steam and
Liquid is sufficiently mixed, and heat transfer effect is improved.
Summary of the invention
The present invention provides a kind of new hot pipe heat exchangers, to solve the technical issues of front occurs.
To achieve the goals above, technical scheme is as follows:
It is a kind of generate steam shell-and-tube heat exchanger, the heat exchanger include upper lower collector pipe and setting upper lower collector pipe it
Between heat exchanger tube；The heat exchanger includes inlet tube and outlet, and the inlet tube is arranged in lower collector pipe, and outlet setting exists
On upper header, the heat exchanger includes heat source import and thermal source outlet, and heat source enters from heat source import, with the fluid in heat exchanger tube
It exchanges heat, is then flowed out from thermal source outlet, the fluid in heat exchanger tube is heated into steam, flows out from outlet, in heat exchanger tube
Fin is arranged in the external of tube wall, and horizontally, the fin is straight panel shape, and the in-plane of fin is along warm for the fin setting
The flow direction in source, along the flow direction of heat exchange tube fluid, fin height constantly increases.
Preferably, along the flow direction of heat exchange tube fluid, the increased amplitude of fin height is increasing.
It is a kind of generate steam shell-and-tube heat exchanger, the heat exchanger include upper lower collector pipe and setting upper lower collector pipe it
Between heat exchanger tube；The heat exchanger includes inlet tube and outlet, and the inlet tube is arranged in lower collector pipe, and outlet setting exists
On upper header, the heat exchanger includes heat source import and thermal source outlet, and heat source enters from heat source import, with the fluid in heat exchanger tube
It exchanges heat, is then flowed out from thermal source outlet, the fluid in heat exchanger tube is heated into steam, flows out from outlet, the heat exchanger tube
Interior setting separating device, the separating device are laminated structures, and the laminated structure is arranged on the cross section of heat exchanger tube；It is described
Separating device is square through-hole and octagon through-hole composition, and the side length of the square through-hole is equal to octagon through-hole
Side length, four of the square through-hole while be respectively four different octagon through-holes while, the four of octagon through-hole
It is a apart from one another by while be respectively four different square through-holes while.
Preferably, heat exchanger tube is square tube.
Preferably, the multiple separating devices of setting in heat exchanger tube, the distance between adjacent separating device is S1, and square is logical
The side length in hole is L1, and the side length of heat exchanger tube is L2, meets following require:
S1/L2=a* (L1/L2)2+b*(L1/L2)-c
Wherein a, b, c are parameters, wherein 39.8 < a < 40.1,9.19 <b < 9.21,0.43 < c < 0.44；
9<L2<58mm；
1.9<L1<3.4mm；
15<S1<31mm。
Further preferably, a=39.87, b=9.20.c=0.432
The side length of square through-hole in different heat exchanger tubes is different, described as the distance apart from inlet tube is remoter
The side length of square through-hole is bigger.
Preferably, the amplitude that the side length of the square through-hole becomes larger is got over as the distance apart from inlet tube is remoter
Come higher.
Preferably, the side length of the square through-hole in heat exchanger tube apart from inlet tube farthest is nearest apart from inlet tube
1.1-1.2 times of the side length of square through-hole in the flat heat exchange tube at place.
Preferably, the side length of the square through-hole apart from inlet tube farthest is the square apart from inlet tube most nearby
1.15 times of the side length of through-hole.
Preferably, the separating device includes at least one of following two type, the first seed type is square
Central compartment device, square through-hole are located at the center of heat exchanger tube, and second of type is octagon central compartment device, and positive eight
Side shape through-hole is located at the center of heat exchanger tube.
Preferably, the separating device type being disposed adjacent is different.
Preferably, a=42.54, b=6.383, c=0.2438.
Compared with prior art, flat heat exchange tube of the invention has the advantage that
1) present invention provides a kind of new-type shell-and-tube vapor heat exchanger, because with the flowing of flowing, internal-external temperature difference difference
Smaller and smaller, heat absorption capacity worse and worse, by increasing fin height, to increase the heat exchange area of fin, is absorbed heat with increasing
Amount, so that caloric receptivity on the whole reaches homogenization.
2) separation of the Novel structure combined the present invention provides a kind of new-type square through-hole and octagon through-hole
Device generates the shell-and-tube heat exchanger of steam, by square and octagon, so that the square hole and octagon that are formed
The angle that the side in hole is formed all is greater than equal to 90 degree, so that fluid can sufficiently flow through each position in each hole, is kept away
Exempt from or reduce the short circuit of fluid flowing.Two-phase fluid is separated into liquid phase and vapour by the separating device of Novel structure by the present invention
Liquid phase is divided into small liquid group, vapour phase is divided into minute bubbles, inhibits the reflux of liquid phase, promotes vapour phase smooth outflow, plays by phase
The effect of regime flow has the effect of vibration and noise reducing, improves heat transfer effect.Separating device in compared with the existing technology, into
One step improves steady flow result, augmentation of heat transfer, and is simple to manufacture.
3) present invention passes through the side length that square through-hole is arranged with the variation apart from inlet tube, so that fluid is hindered to flowing
It is flowed in the small heat exchanger tube remote apart from inlet tube of power, so that fluid is evenly distributed in heat exchanger tube, improves heat exchange effect
Rate improves service life.
4) present invention is by being reasonably laid out, so that square and octagon through-hole are evenly distributed, so that whole
On rank street face on fluid segmentation uniformly, avoid the segmentation of ring structure in the prior art circumferentially and unevenly ask
Topic.
5) present invention is uniformly distributed by the interval of square hole and octagon hole, so that macropore and aperture are whole
Body is evenly distributed on cross section, and by the change in location of the macropore of adjacent separating device and aperture, so that segregation
More preferably.
6) present invention is laminated structure by setting separating device, so that separating device structure is simple, cost is reduced.
7) present invention by be arranged on fluid flow direction between adjacent separating device in heat exchanger tube distance, separate fill
The rule variation of the parameters sizes such as the side length in the hole set, the caliber of heat exchanger tube, tube spacing, has studied the optimal pass of above-mentioned parameter
It is size, to further reach steady flow result, reduces noise, improve heat transfer effect.
8) present invention widely grind by heat exchange rule caused by the variation to annular and separation device parameters
Study carefully, when meeting flow resistance, realizes the best relation formula of the effect of vibration and noise reducing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present invention heat exchanger；
Fig. 2 separating device structural schematic diagram of the present invention；
Fig. 3 is another structural schematic diagram of separating device of the present invention；
Fig. 4 is the schematic diagram that separating device of the present invention is arranged in heat exchanger tube.
Fig. 5 is that separating device of the present invention arranges cross-sectional view in heat exchanger tube.
Fig. 6 is that fin of the present invention arranges cross-sectional view outside heat exchanger tube.
Appended drawing reference is as follows:
1 heat exchanger tube, 2 fins, 3 inlet tubes, 4 outlets, 5, separating device, square through-hole 51, octagon through-hole 52,
53,6 heat source import of side, 7 thermal source outlets, 8 upper headers, 9 lower collector pipes
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
Herein, if without specified otherwise, it is related to formula, "/" indicates that division, "×", " * " indicate multiplication.
A kind of shell-and-tube heat exchanger generating steam, as shown in Figure 1, the heat exchanger include upper header 8 and lower collector pipe 9 with
And the heat exchanger tube 1 between upper lower collector pipe 8,9 is set.The heat exchanger includes inlet tube 3 and outlet 4, and the inlet tube 3 is set
It sets in lower collector pipe, outlet is arranged on upper header, and the heat exchanger includes heat source import 6 and thermal source outlet 7, and heat source is from warm
Source import 6 enters, and exchanges heat with the fluid in heat exchanger tube 1, then flows out from thermal source outlet 7, the fluid heating in heat exchanger tube 1
At steam, flowed out from outlet 4.Preferably, fin 2 is arranged between the heat exchanger tube.Because the fluid in heat exchanger tube is changing
Heating generates steam in heat pipe, causes to form stream-liquid two-phase flow in heat exchanger tube 1 in this way.
As Figure 2-3, annular and separation device 5 is set in heat exchanger tube 1.The structure of the annular and separation device 5 is shown in figure
2-3.The separating device 5 is laminated structure, and the laminated structure is arranged on the cross section of heat exchanger tube 6；The separating device 5
Be square with octagon structure composition, to form square through-hole 51 and octagon through-hole 52.It is square as described in Figure 3
The side length of shape through-hole 51 is equal to the side length of octagon through-hole 52, and four sides 53 of the square through-hole are four differences respectively
Octagon through-hole side 53, positive eight deformation four of through-hole apart from one another by side 53 be that four different squares are logical respectively
The side 53 in hole.
The present invention uses the separating device of Novel structure, has the advantages that
1) separation of the Novel structure combined the present invention provides a kind of new-type square through-hole and octagon through-hole
Device, by square and octagon, so that the angle that the side of the square hole and octagon hole that are formed is formed all is big
In being equal to 90 degree, so that fluid can sufficiently flow through each position in each hole, the short of fluid flowing is avoided or reduced
Road.Two-phase fluid is separated into liquid phase and vapour phase by the separating device of Novel structure by the present invention, and liquid phase is divided into small liquid group,
Vapour phase is divided into minute bubbles, inhibits the reflux of liquid phase, promotes vapour phase smooth outflow, plays the role of regime flow, has and subtracts
The effect of vibration noise reduction, improves heat transfer effect.Separating device in compared with the existing technology further increases steady flow result, strengthens
Heat transfer, and be simple to manufacture.
2) present invention is by being reasonably laid out, so that square and octagon through-hole are evenly distributed, so that whole
On rank street face on fluid segmentation uniformly, avoid the segmentation of ring structure in the prior art circumferentially and unevenly ask
Topic.
3) present invention is uniformly distributed by the interval of square hole and octagon through-hole, so that macropore and aperture exist
It is evenly distributed on whole cross section, and by the change in location of the macropore of adjacent separating device and aperture, so that separating effect
Fruit is more preferable.
4) present invention is laminated structure by setting separating device, so that separating device structure is simple, cost is reduced.
The present invention is equivalent to by setting annular and separation device and increases interior heat exchange area in heat exchanger tube, enhanced and changed
Heat improves heat transfer effect.
The present invention is because all cross-section locations by vehicle repair major in all heat exchanger tubes are divided, thus entire
The segmentation of liquid-vaqor interface and vapour phase boundary layer and the contact area of cooling wall are realized on heat exchange tube section and enhances disturbance, greatly
Big reduces noise and vibration, enhances heat transfer.
Preferably, the separating device includes two types, such as Fig. 2, shown in 3, the first seed type is square center
Separating device, square are located at the center of heat exchanger tube or condenser pipe, as shown in Figure 3.Second is octagon central compartment
Device, octagon are located at the center of heat exchanger tube or condenser pipe, as shown in Figure 2.Preferably as one, above two type
Separating device is disposed adjacent, that is, the separating device type being disposed adjacent is different.I.e. adjacent with square center separating device is
Octagon central compartment device, adjacent with octagon central compartment device is square center separating device.The present invention
It is uniformly distributed by the interval of square hole and octagon hole, so that macropore and aperture are distributed on whole cross section
It is even, and by the change in location of the macropore of adjacent separating device and aperture so that by the fluid of macropore followed by
Aperture, by the fluid of aperture followed by macropore, further progress separates, and promotes the mixing of vapour-liquid, so that separating and changing
Thermal effect is more preferable.
Preferably, the cross section of the heat exchanger tube 1 is square.
Preferably, fin 2 is arranged in the external of tube wall in heat exchanger tube 1.Preferably, the fin is arranged in transverse direction
On.Extend on the flow direction of heat source.
Preferably, fin be arranged in it is non-in face of heat source and the two sides for carrying heat source.Heat source flow direction is set
On side wall, rather than it is arranged on the tube wall of the front and back of heat source flow direction.
Preferably, the fin is straight panel shape, the transverse extension direction of fin along heat source flow direction.
Preferably, 2 height of outside fin is continuous to be increased, and height increases along the flow direction of heat exchange tube fluid
Amplitude it is increasing.Because internal-external temperature difference difference is smaller and smaller, and heat absorption capacity worse and worse, passes through with the flowing of flowing
Increase fin height, to increase the heat exchange area of fin, to increase caloric receptivity, so that caloric receptivity on the whole reaches uniform
Change.Experiment discovery, by so set, about 5% heat exchange efficiency can be improved compared with fin height is identical.
Preferably, the height of the fin 2 is constantly reduced along the centre of 1 cross section of heat exchanger tube to two sides.Wherein,
Positioned at the middle position of heat exchanger tube 1, the height highest of fin.
Because being found by experiment that, heat exchanger tube is most in middle part heat dissipation, and from middle part to two sides, heat dissipation is gradually become smaller, therefore
Pass through setting heat exchanger tube outside fin height change, so that the heat dissipation area of heat exchanger tube middle part maximum, two sides most
It is small, so that middle part heat-sinking capability is maximum, meet the heat dissipation law of heat exchange tubular heat in this way, so that heat exchanger tube heat dissipation is equal on the whole
It is even, it avoids heat exchanger tube local temperature from overheating, causes heat dissipation effect excessively poor, cause the shortening of heat exchange tube lifetime.
Preferably, the heat exchanger includes inlet tube 3 and outlet 4, the inlet tube 3 is arranged in lower collector pipe 9
Between position, the middle position of upper header 8 is arranged in outlet 4.Setting guarantees that assignment of traffic is uniform in middle position.Mainly because
What it is for heat exchanger tube flowing is steam, therefore inlet tube 3 is arranged in lower part.
Preferably, the side length of the square through-hole in different heat exchanger tubes is different, as the distance apart from inlet tube 3 is got over
Far, the side length of the square through-hole in the heat exchanger tube is bigger.By so set, make it is closer apart from inlet tube 3, then because
Smaller for the small caused circulation area of side length, then the resistance for causing fluid to flow becomes larger, so that fluid is small to flow resistance
Heat exchanger tube in flowing flowed so that fluid is got in the heat exchanger tube of distant positions towards the distance apart from inlet tube 3 so that stream
Body is evenly distributed.
Preferably, as the distance apart from inlet tube 3 is remoter, the slave inlet tube 3 of example as shown in figure 1 to the left and right change by two sides
The increasing degree in heat pipe direction, the side length of the square through-hole in the heat exchanger tube is higher and higher.It is found through experiments that, passes through
The increase of the amplitude of the side length of square through-hole in heat exchanger tube enables to fluid distribution more uniform.I.e. pipe a square is logical
The side length in hole < pipe b square through-hole side length < pipe c square through-hole side length < pipe d square through-hole side length ..., according to this
Analogize.
Preferably, the side length of the square through-hole in heat exchanger tube apart from inlet tube farthest is nearest apart from inlet tube
1.1-1.2 times of the side length of square through-hole in the flat heat exchange tube at place.
Preferably, the side length of the square through-hole apart from inlet tube farthest is the square apart from inlet tube most nearby
1.15 times of the side length of through-hole.
Preferably, the quantity of the separating device in every heat exchanger tube is identical.
Preferably, the distributed quantity of separating device 5 in different heat exchanger tubes is different, with apart from inlet tube 3 away from
Distributed quantity from the separating device in remoter, described heat exchanger tube is fewer and fewer.By so set, making apart from inlet tube
3 is closer, then because the distributed quantity of separating device is more, then the resistance for causing fluid to flow becomes larger, so that fluid is to flowing
Flowing, flows so that fluid is got in the heat exchanger tube of distant positions towards the distance apart from inlet tube 3 in the small heat exchanger tube of resistance, thus
So that fluid is evenly distributed.
Preferably, the separating device distribution number quantitative change as the distance apart from inlet tube 3 is remoter, in the heat exchanger tube
Few amplitude is higher and higher.It is found through experiments that, by the increase for the amplitude that quantity becomes larger, enables to fluid distribution more equal
It is even.
Separating device distributed quantity in heat exchanger tube apart from 3 farthest of inlet tube is apart from most the changing nearby of inlet tube 3
0.8-0.9 times of the distributed quantity of intercommunicating pore 6 in heat pipe, preferably 0.85 times.
Preferably, the caliber of different heat exchanger tubes is different, with remoter, the described heat exchange of the distance apart from inlet tube 3
Pipe caliber is bigger.By so set, make it is closer apart from inlet tube 3, then because heat exchange tube diameter it is small, then cause fluid to flow
Resistance become larger so that fluid is flowed into the small heat exchanger tube of flow resistance so that fluid towards apart from inlet tube 3 away from
It is flowed in heat exchanger tube from more distant positions, so that fluid is evenly distributed.
Preferably, the bigger amplitude of the heat exchange tube diameter is increasingly as the distance apart from inlet tube 3 is remoter
It is high.It is found through experiments that, by the increase for the amplitude that caliber becomes larger, enables to fluid distribution more uniform.
The caliber in heat exchanger tube apart from 3 farthest of inlet tube is the heat exchange tube diameter apart from inlet tube 3 most nearby
0.85-0.9 times, preferably 0.88 times.
Preferably, the cross section of the heat exchanger tube 1 is square.
Preferably, along the direction that fluid in heat exchanger tube 1 flows, the caliber of heat exchanger tube 1 constantly increases.Main cause
It is as follows: 1) by increase heat exchanger tube caliber, it is possible to reduce the resistance of flowing so that heat exchange in-tube evaporation steam constantly to
The movement of caliber increased direction, to further promote circulating for loop circuit heat pipe.2) because it is continuous with fluid
Flowing, liquid constantly evaporate in heat exchanger tube, so that steam volume is increasing, pressure is also increasing, therefore logical
The variation for increasing caliber to meet ever-increasing steam volume and pressure is crossed, so that pressure is evenly distributed on the whole.3)
Pass through the increase of the caliber of heat exchanger tube, it is possible to reduce impact phenomenon caused by the increase of the volume of steam outlet.
Preferably, constantly increased amplitude is increasing for the caliber of heat exchanger tube 1 along the direction that fluid flows.On
The amplitude variation for stating caliber is that the applicant obtains with numerical simulation through a large number of experiments as a result, by above-mentioned setting,
Circulating for loop circuit heat pipe can further be promoted, it is integrally uniform to reach pressure, reduces impact phenomenon.
Preferably, the multiple separating devices of setting in heat exchanger tube separate from the entrance of heat exchanger tube 1 to the outlet of heat exchanger tube 1
Spacing between device is smaller.If the distance apart from heat exchange tube inlet is H, the spacing between adjacent separating device is S, S=F1
(H), i.e. S is using height H as the function of variable, and S ' is the first order derivative of S, meets following require:
S'<0；
Main cause is that meeting carrier's liquid changes in uphill process in uphill process because of the steam in heat exchanger tube
Heat pipe is constantly heated, and causes the steam in stream-liquid two-phase flow more and more, because the vapour phase in stream-liquid two-phase flow is more and more,
Exchange capability of heat in heat exchanger tube can increase with vapour phase and weaken relatively, and vibration and its noise also can be continuous with vapour phase increase
Increase.Therefore the distance between the adjacent separating device for needing to be arranged is shorter and shorter.
In addition, from heat transfer tube outlet to upper header or this section of collector is condensed, because the space of this section becomes larger suddenly,
The variation in space will lead to quickly flowing upwards out and assemble for gas, thus spatial variations will lead to the vapour phase (vapour group) of aggregation from
Heat exchanger tube position enters condensation collector, and due to gas (vapour) liquid density contrast, air mass leaves adapter tube position and will move rapidly upward, and gas
The former spatial position of group pushes away the liquid of wall surface by air mass while will also spring back and hit wall surface rapidly, forms impingement phenomenon.Gas
(vapour) liquid phase is more discontinuous, and air mass aggregation is bigger, and water hammer energy is bigger.Impingement phenomenon will cause biggish noise vibration and machinery
Impact, damages equipment.Therefore in order to avoid the generation of this phenomenon, between the adjacent separating device being arranged at this time away from
From shorter and shorter, to constantly separate liquid and vapor capacity in fluid delivery process, thus reduce to the full extent vibration and
Noise.
It is found through experiments that, by above-mentioned setting, can both reduce vibration and noise to the full extent, while can mention
High heat transfer effect.
Further preferably, from the entrance of heat exchanger tube 1 to the outlet of heat exchanger tube 1, the distance between adjacent separating device is more next
Shorter amplitude is continuously increased.That is S " is the second derivative of S, meets following require:
S">0；
It is found through experiments that, by being improved simultaneously so set, 7% or so vibration and noise can be further decreased
8% or so heat transfer effect.
Preferably, the multiple separating devices of setting in heat exchanger tube, square from the entrance of heat exchanger tube 1 to the outlet of heat exchanger tube 1
The side length of shape is smaller and smaller.Distance apart from heat exchange tube inlet is H, and square side length is C, C=F2(H), C ' is the primary of C
Derivative meets following require:
C'<0；
Further preferably, the entrance of heat exchanger tube 1 is to the outlet of heat exchanger tube 1, and the smaller and smaller amplitude of square side length is not
Disconnected increase.C " is the second derivative of C, meets following require:
C”>0。
Specific reason changes referring to front separating device spacing.
Preferably, the distance between adjacent separating device remains unchanged.
Preferably, gap is arranged in the heat transfer tube wall, the outer end of the separating device is arranged in gap.
Preferably, heat exchanger tube is welded for multi-segment structure, separating device is arranged in the junction of multi-segment structure.
It is learnt by analyzing and testing, the spacing between separating device cannot be excessive, leads to damping noise reduction if excessive
Effect it is bad, while can not be too small, cause resistance excessive if too small, similarly, square side length can not it is excessive or
Person is too small, and the effect for also resulting in damping noise reduction is bad or resistance is excessive, therefore the present invention is through a large number of experiments, preferential
Meet normal flow resistance (total pressure-bearing be 2.5Mpa hereinafter, single heat exchange tube on-way resistance be less than or equal to 5Pa/M)
In the case where, so that being optimal of damping noise reduction, has arranged the optimal relationship of parameters.
Preferably, the distance between adjacent separating device is S1, the side length of square through-hole is L1, and heat exchanger tube is pros
Tee section, the side length of heat exchanger tube square section are L2, meet following require:
S1/L2=a* (L1/L2)2+b*(L1/L2)-c
Wherein a, b, c are parameters, wherein 39.8 < a < 40.1,9.19 <b < 9.21,0.43 < c < 0.44；
9<L2<58mm；
1.9<L1<3.4mm；
15<S1<31mm。
Further preferably, a=39.87, b=9.20.c=0.432
Further preferably, with the increase of L1/L2, a, b is increasing, and c is smaller and smaller.
Preferably, the side length L1 of square through-hole is the average value of side length and outer side length in square through-hole, heat exchanger tube
The side length L2 of square section is the average value of side length and outer side length in heat exchanger tube.
Preferably, the outer side length of square through-hole is equal to the interior side length of heat exchanger tube square section.
Preferably, with the increase of L2, L1 is also continuously increased.But with the increase of L2, the ever-increasing amplitude of L1
It is smaller and smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, and the variation of above-mentioned rule, Neng Goujin are passed through
One step improves heat transfer effect, reduces noise.
Preferably, with the increase of L2, S1 constantly reduces.But with the increase of L2, the ever-reduced amplitude of S1 is got over
Come smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, can be into one by the variation of above-mentioned rule
Step improves heat transfer effect, reduces noise.
It is learnt by analyzing and testing, the spacing of heat exchanger tube will also meet certain requirements, such as cannot excessive or mistake
It is small, no matter it is too large or too small all heat transfer effect can be caused bad, and because the application heat exchanger tube in be provided with separating device,
Therefore also heat exchanging tube spacing there are certain requirements separating device.Therefore the present invention through a large number of experiments, meets normally preferential
Flow resistance (total pressure-bearing be 2.5Mpa hereinafter, single heat exchange tube on-way resistance be less than or equal to 5Pa/M) in the case where,
So that being optimal of damping noise reduction, has arranged the optimal relationship of parameters.
The distance between adjacent separating device is S1, and square side length is L1, and heat exchanger tube is square section, heat exchanger tube
Side length be L2, the spacing between adjacent heat exchange tube hub is that S2 meets following require:
S2/L2=d* (S1/L2)2+e-f*(S1/L2)3-h*(S1/L2)；
Wherein d, e, f, h are parameters,
0.280<d<0.285,1.342<e<1.350,0.060<f<0.065,0.169<h<0.171；
9<L2<58mm；
1.9<L1<3.4mm；
15<S1<31mm。
16<S2<76mm。
Spacing between adjacent heat exchange tube hub is that S2 refers to the distance between heat exchange tube hub line.
Further preferably, d=0.282, e=1.347, f=0.062, h=0.170；
Preferably, d, e is increasing with the increase of S1/L2, f, h are smaller and smaller.
Preferably, S2 is continuously increased with the increase of L2, but with the increase of L2, the ever-increasing amplitude of S2 is got over
Come smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, can be into one by the variation of above-mentioned rule
Step improves heat transfer effect.
Preferably, heat exchanger tube length L is between 2000-2500mm.Further preferably, between 2200-2300mm.
By the preferred of the optimal geometric scale of above-mentioned formula, can be realized under the conditions of meeting normal flow resistance,
Damping noise reduction reaches optimum efficiency.
For parameters such as other parameters, such as tube wall, shell wall thickness according to normal standard setting.
Preferably, heat exchange tube fluid is water.
Preferably, heat source is flue gas.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention
When being defined by the scope defined by the claims..
Claims (4)
1. a kind of shell-and-tube heat exchanger for generating steam, the heat exchanger includes upper lower collector pipe and is arranged between upper lower collector pipe
Heat exchanger tube；The heat exchanger includes inlet tube and outlet, and the inlet tube is arranged in lower collector pipe, and outlet is arranged upper
On collector, the heat exchanger includes heat source import and thermal source outlet, and heat source enters from heat source import, with the fluid in heat exchanger tube into
Row heat exchange, then flows out from thermal source outlet, and the fluid in heat exchanger tube is heated into steam, flows out from outlet, it is characterised in that:
Fin is arranged in the external of the tube wall of heat exchanger tube, and horizontally, the fin is straight panel shape, the plane side of fin for the fin setting
To the flow direction along heat source, along the flow direction of heat exchange tube fluid, fin height constantly increases.
2. heat exchanger as described in claim 1, which is characterized in that along the flow direction of heat exchange tube fluid, fin height
Increased amplitude is increasing.
3. heat exchanger as described in claim 1, which is characterized in that separating device, the separation dress are arranged in the heat exchanger tube
Setting is laminated structure, and the laminated structure is arranged on the cross section of heat exchanger tube；The separating device is square through-hole and just
Octagon through-hole composition, the side length of the square through-hole are equal to the side length of octagon through-hole, and the four of the square through-hole
It is a while be respectively four different octagon through-holes while, four of octagon through-hole apart from one another by side be four respectively
The side of different square through-holes.
4. heat exchanger as claimed in claim 3, which is characterized in that heat exchanger tube is square tube.
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| CN201810806188.7A CN109539826B (en) | 2018-07-20 | 2018-07-20 | Shell-and-tube heat exchanger with variable fin height |
| CN201911138745.3A CN110864567B (en) | 2018-07-20 | 2018-07-20 | Balanced flow design method for digital variable heat exchanger |
| CN202010268216.1A CN111412764B (en) | 2018-07-20 | 2018-07-20 | Design method of separating device in heat exchange tube for vapor-liquid two-phase flow |
| CN201911138758.0A CN110864568B (en) | 2018-07-20 | 2018-07-20 | Design method for balanced flow of side length change heat exchanger |
| CN202010268088.0A CN111412763B (en) | 2018-07-20 | 2018-07-20 | Design method for internal size of vapor-liquid two-phase flow heat exchange tube |
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| CN201810806188.7A CN109539826B (en) | 2018-07-20 | 2018-07-20 | Shell-and-tube heat exchanger with variable fin height |
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| CN201911138745.3A Division CN110864567B (en) | 2018-07-20 | 2018-07-20 | Balanced flow design method for digital variable heat exchanger |
| CN201911138758.0A Division CN110864568B (en) | 2018-07-20 | 2018-07-20 | Design method for balanced flow of side length change heat exchanger |
| CN202010268088.0A Division CN111412763B (en) | 2018-07-20 | 2018-07-20 | Design method for internal size of vapor-liquid two-phase flow heat exchange tube |
| CN202010268216.1A Division CN111412764B (en) | 2018-07-20 | 2018-07-20 | Design method of separating device in heat exchange tube for vapor-liquid two-phase flow |
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| CN201911138758.0A Active CN110864568B (en) | 2018-07-20 | 2018-07-20 | Design method for balanced flow of side length change heat exchanger |
| CN202010268216.1A Active CN111412764B (en) | 2018-07-20 | 2018-07-20 | Design method of separating device in heat exchange tube for vapor-liquid two-phase flow |
| CN201810806188.7A Expired - Fee Related CN109539826B (en) | 2018-07-20 | 2018-07-20 | Shell-and-tube heat exchanger with variable fin height |
| CN202010268088.0A Active CN111412763B (en) | 2018-07-20 | 2018-07-20 | Design method for internal size of vapor-liquid two-phase flow heat exchange tube |
| CN201911138745.3A Active CN110864567B (en) | 2018-07-20 | 2018-07-20 | Balanced flow design method for digital variable heat exchanger |
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| CN202010268216.1A Active CN111412764B (en) | 2018-07-20 | 2018-07-20 | Design method of separating device in heat exchange tube for vapor-liquid two-phase flow |
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| CN202010268088.0A Active CN111412763B (en) | 2018-07-20 | 2018-07-20 | Design method for internal size of vapor-liquid two-phase flow heat exchange tube |
| CN201911138745.3A Active CN110864567B (en) | 2018-07-20 | 2018-07-20 | Balanced flow design method for digital variable heat exchanger |
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| CN113804021A (en) * | 2020-12-18 | 2021-12-17 | 国网山东综合能源服务有限公司 | Shell-and-tube heat exchanger with total radian of linear drainage plate changing along length |
| CN116734641A (en) * | 2022-04-07 | 2023-09-12 | 青岛科技大学 | Plate heat exchanger of field cooperative control cylinder density |
| CN116734641B (en) * | 2022-04-07 | 2024-04-19 | 北京凯迪宏业科技有限公司 | Plate heat exchanger of field cooperative control cylinder density |
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| CN112640707A (en) * | 2020-12-14 | 2021-04-13 | 云南农业大学 | Terminal enhanced heat transfer device of soil steam sterilizer |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110864567B (en) | 2020-11-24 |
| CN111412763B (en) | 2021-07-23 |
| CN111412764B (en) | 2021-09-21 |
| CN110864568B (en) | 2021-04-06 |
| CN109539826B (en) | 2020-04-28 |
| CN111412764A (en) | 2020-07-14 |
| CN111412763A (en) | 2020-07-14 |
| CN110864567A (en) | 2020-03-06 |
| CN110864568A (en) | 2020-03-06 |
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