CN107869924B - A kind of shell-and-tube heat exchanger of the condensable multitube constant-current stabilizer of vapour phase - Google Patents
A kind of shell-and-tube heat exchanger of the condensable multitube constant-current stabilizer of vapour phase Download PDFInfo
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- CN107869924B CN107869924B CN201710168108.5A CN201710168108A CN107869924B CN 107869924 B CN107869924 B CN 107869924B CN 201710168108 A CN201710168108 A CN 201710168108A CN 107869924 B CN107869924 B CN 107869924B
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- Prior art keywords
- constant
- shell
- heat exchanger
- current stabilizer
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- 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
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
Abstract
The present invention provides a kind of stream-liquid two-phase flow multitube shell-and-tube heat exchangers, including shell, end socket is respectively set in the shell both ends, tube sheet is arranged in the link position of the end socket and shell, the tube sheet at heat exchanger tube connection both ends, vapour phase in stream-liquid two-phase flow can be condensed into liquid phase in heat transfer process, it is characterized in that, constant-current stabilizer is set in the heat exchanger tube, the constant-current stabilizer includes core and shell, in the shell, the shell is connected and fixed with heat transfer tube wall for the core setting, and the core is composed of together a number of pipe adjoining.The present invention provides a kind of heat exchanger of the constant-current stabilizer of Novel structure, there are when Gas- liquid two-phase flow in pipeline, augmentation of heat transfer, while weakening the vibration of pipeline, reduce noise level.
Description
Technical field
The present invention relates to a kind of shell-and-tube heat exchangers, exchange heat more particularly, to a kind of two-phase flow containing condensable steam
Device.
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 impingement phenomenon
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.
Therefore in view of the above-mentioned problems, the present invention provides a kind of heat exchangers of the constant-current stabilizer of Novel structure, to solve
Above-mentioned problem.
Summary of the invention
The object of the present invention is to provide a kind of heat exchangers of the constant-current stabilizer of Novel structure, and there are vehicle repair majors in pipeline
When flowing, weaken the vibration in stream-liquid two-phase flow heat exchanger tube, reduces noise level, while augmentation of heat transfer.
To achieve the goals above, technical scheme is as follows:
End socket is respectively set in a kind of stream-liquid two-phase flow multitube shell-and-tube heat exchanger, including shell, the shell both ends, institute
The link position setting tube sheet of end socket and shell is stated, heat exchanger tube connects the tube sheet at both ends, and the vapour phase in stream-liquid two-phase flow is exchanging heat
It can be condensed into liquid phase in the process, which is characterized in that constant-current stabilizer is set in the heat exchanger tube, and the constant-current stabilizer includes core
And shell, in the shell, the shell is connected and fixed with heat transfer tube wall, and the core is by a number of for the core setting
Pipe adjoining be composed together.
Preferably, adjacent pipe is by being welded together.
Preferably, aperture is arranged between adjacent pipe realizes perforation.
Preferably, the multiple constant-current stabilizers of setting in heat exchanger tube, the distance apart from heat exchange tube inlet is X, adjacent current stabilization dress
It the distance between sets as S, S=F1(X), meet following require:
S’>0,S”>0。
Preferably, the multiple constant-current stabilizers of setting in heat exchanger tube, the distance apart from heat exchange tube inlet is X, constant-current stabilizer
Length is C, C=F2(X), meet following require:
C’<0,C”<0。
Preferably, the multiple constant-current stabilizers of setting in heat exchanger tube, the distance apart from heat exchange tube inlet is X, constant-current stabilizer
Pipe diameter is D, D=F3(X), meet following require:
D’>0,D”>0。
Preferably, groove is arranged in the heat transfer tube wall, the shell of the constant-current stabilizer is arranged in groove, described outer
The inner wall of shell and the aligning inner of heat exchanger tube.
Preferably, heat exchanger tube is welded for multi-segment structure, constant-current stabilizer is arranged in the junction of multi-segment structure.
Preferably, the distance between adjacent constant-current stabilizer is S, the length of constant-current stabilizer is C, and the outer diameter of heat exchanger tube is W,
The pipe diameter of constant-current stabilizer is D, meets following require:
S/C=a-b*LN (W/D)；Wherein LN is logarithmic function, and a, b are parameters, wherein 8 < a < 9,3 <b < 4；
Wherein the spacing of constant-current stabilizer is the both ends the distance between opposite with adjacent constant-current stabilizer；
34<W<58mm；
7<D<12mm；
14<C<23mm；
50<S<70mm。
Preferably, a=8.5, b=3.7.
Compared with prior art, of the invention to have the advantage that
1) multitube constant-current stabilizer is arranged in the present invention in heat exchanger tube, is separated two-phase fluid by multitube constant-current stabilizer
At liquid phase and vapour phase, liquid phase is divided into small liquid group, vapour phase is divided into minute bubbles, inhibits the reflux of liquid phase, promotes vapour phase suitable
Channel Group is dynamic, plays the role of regime flow, has the effect of vibration and noise reducing.
2) present invention is equivalent in heat exchanger tube by setting multitube constant-current stabilizer and increases inner fin, enhanced and changed
Heat improves heat transfer effect.
3) present invention avoids existing because vehicle repair major is divided in the entire cross-section location of heat exchanger tube
Only heat transfer tube wall face is split in technology, expands liquid-vaqor interface and vapour phase to realize on entirely heat exchange tube section
The contact area of boundary layer and cooling wall simultaneously enhances disturbance, reduces noise and vibration, enhances heat transfer.
4) present invention is by setting up the distance between adjacent constant-current stabilizer, the length of constant-current stabilizer in heat exchanger tube length side
The rule variation of the parameters size such as outer diameter of degree, pipe reduces noise to further reach steady flow result, improves heat exchange effect
Fruit.
5) present invention has been carried out widely by heat exchange rule caused by the variation to multitube constant-current stabilizer parameters
Research, 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 two-phase flow tube shell type heat exchanger of the invention；
Fig. 2 is the heat transfer tube structure diagram of two-phase flow tube shell type heat exchanger of the invention；
Fig. 3 constant-current stabilizer structural schematic diagram of the present invention；
Fig. 4 is constant-current stabilizer of the present invention arrangement schematic diagram in heat exchanger tube；
Fig. 5 is another schematic diagram that constant-current stabilizer of the present invention is arranged in heat exchanger tube.
Fig. 6 is that constant-current stabilizer of the present invention arranges cross-sectional view in heat exchanger tube.
Appended drawing reference is as follows: front head 1, cover flange 2, front tube sheet 3, shell 4, constant-current stabilizer 5, heat exchanger tube 6, back tube sheet
7, cover flange 8, rear head 9, support 10, support 11, tube-side inlet pipe 12, tube side outlet 13, shell side inlet pipe 14, shell side
Outlet 15, pipe 51, constant-current stabilizer shell 51
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.
It should be noted that if the two phase flow that the present invention mentions is stream-liquid two-phase flow, vapour herein without specified otherwise
Liquid phase can be mutually condensed into heat transfer process.
A kind of shell-and-tube heat exchanger as shown in Figure 1, the shell-and-tube heat exchanger include shell 4, heat exchanger tube 6, tube side
Inlet tube 12, tube side outlet 13, shell side inlet adapter tube 14 and shell-side outlet adapter tube 15；6 groups of multiple heat exchanger tubes disposed in parallel
At heat-exchanging tube bundle be connected to front tube sheet 3, on back tube sheet 7；The front end of the front tube sheet 3 is connect with front head 1, back tube sheet 7
Rear end connects rear head 9；The tube-side inlet pipe 12 is arranged on rear head 9；The tube side outlet 13 is arranged preceding
On end socket 1；The shell side inlet adapter tube 14 and shell-side outlet adapter tube 15 is arranged on shell 4；The fluid of two phase flow is from pipe
Journey inlet tube 12 enters, and exchanges heat by heat exchanger tube, goes out from tube side outlet 13.
As illustrated in figures 4-5, bundled tube constant-current stabilizer 5 is set in heat exchanger tube 6.The structure of the bundled tube constant-current stabilizer 5
See Fig. 3.As shown in figure 3, the constant-current stabilizer 5 includes core and shell 52, the core is arranged in shell 52, the shell
It is connected and fixed with heat transfer tube wall, the core is composed of together a number of parallel adjoining of pipe 51.
Multitube constant-current stabilizer is arranged in the present invention in heat exchanger tube, by multitube constant-current stabilizer by the liquid in two-phase fluid
It is mutually separated with vapour phase, 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 the effect of vibration and noise reducing.
The present invention is equivalent in heat exchanger tube by setting multitube constant-current stabilizer and increases inner fin, enhance heat exchange,
Improve 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, by being arranged insert in the space between shell 52 and outermost layer pipe 51, guarantee pipe it
Between closely connect, while guaranteeing that pipe 51 is fixed in shell 52.
Preferably, adjacent pipe 51 is by being welded together.It is linked together, be ensure that by welding manner
Being connected firmly between pipe.
Preferably, aperture is arranged between adjacent pipe 51 realizes perforation.By the way that aperture is arranged, it is ensured that adjacent pipe
It is interconnected between son, pressure that can uniformly between pipe, so that the fluid of high pressure runner flows to low pressure, while can also be
Fluid further separates liquid phase and vapour phase while flowing, is conducive to further stablize two-phase flow.
Preferably, along the flow direction of heat exchange tube fluid, the multiple constant-current stabilizers of setting in heat exchanger tube, from heat exchanger tube
Entrance to the outlet of heat exchanger tube, the distance between adjacent constant-current stabilizer is increasingly longer.Distance apart from heat exchange tube inlet is X,
The distance between adjacent constant-current stabilizer is S, S=F1(X), S ' is the first order derivative of S, meets following require:
S'>0；
Main cause is because containing steam in fluid, and along the flow direction of fluid, steam is because in heat exchanger tube
Fluid heat release and condense, to be condensed into liquid phase, this leads to the flow direction along heat exchange tube fluid, and steam can be increasingly
Few, the vapour phase in stream-liquid two-phase flow is fewer and fewer, and the exchange capability of heat in heat exchanger tube can be continuous for liquid phase with vapor-phase conversion
Increase, vibration and its noise also can with vapor-phase conversion be liquid phase and constantly reduce.It therefore, can be by the spacing of constant-current stabilizer
Become larger, on the one hand can reduce flow resistance in this way, on the other hand also be able to maintain low noise and low vibration, and can also be because of steady
It is fewer and fewer as the distribution of inner fin to flow device, keeps the heat exchange on entire heat exchanger tube uniform, but also material can be saved.
It is found through experiments that, by above-mentioned setting, can both reduce vibration and noise to the full extent, while can protect
Card reduces the flow resistance of fluid.
Further preferably, from the entrance of heat exchanger tube to the outlet of heat exchanger tube, the distance between adjacent constant-current stabilizer is increasingly
Long 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 reduced simultaneously so set, 8% or so vibration and noise can be further decreased
The resistance of flowing 6% or so.
Preferably, the length of each constant-current stabilizer remains unchanged.
Preferably, other than the distance between adjacent constant-current stabilizer, constant-current stabilizer others parameter (such as length,
Caliber etc.) it remains unchanged.
Preferably, along the flow direction of fluid in heat exchanger tube 6, the multiple constant-current stabilizers 5 of setting in heat exchanger tube 6, from changing
For the entrance of heat pipe 6 to the outlet of heat exchanger tube 6, the length of constant-current stabilizer 5 is shorter and shorter.I.e. the length of constant-current stabilizer is C, C=F2
(X), C ' is the first order derivative of C, meets following require:
C'<0；
Further preferably, from the entrance of heat exchanger tube to the outlet of heat exchanger tube, the shorter and shorter amplitude of the length of constant-current stabilizer
It is continuously increased.That is C " is the second derivative of C, meets following require:
C">0；
The variation of the distance between for example adjacent constant-current stabilizer of specific reason is identical.
Preferably, the distance between adjacent constant-current stabilizer remains unchanged.
Preferably, the length in addition to constant-current stabilizer is outside one's consideration, constant-current stabilizer others parameter (such as adjacent spacing, caliber
Deng) remain unchanged.
Preferably, along the flow direction of fluid in heat exchanger tube 6, the multiple constant-current stabilizers of setting in heat exchanger tube 6, from heat exchange
For the entrance of pipe 6 to the outlet of heat exchanger tube 6, the diameter of the pipe 51 in different constant-current stabilizers 5 is increasing.That is the pipe of constant-current stabilizer
Sub- diameter is D, D=F3(X), D ' is the first order derivative of D, meets following require:
D'>0；
Preferably, from the entrance of heat exchanger tube to the outlet of heat exchanger tube, the increasing width of the pipe diameter of constant-current stabilizer
Degree is continuously increased.I.e.
D " is the second derivative of D, meets following require:
D”>0。
The variation of the distance between for example adjacent constant-current stabilizer of specific reason is identical.
Preferably, the length of constant-current stabilizer and the distance of adjacent constant-current stabilizer remain unchanged.
Preferably, other than the pipe diameter of constant-current stabilizer, constant-current stabilizer others parameter (such as it is length, adjacent steady
The distance between stream device etc.) it remains unchanged.
Further preferably, as shown in figure 4, groove is arranged inside the heat exchanger tube 6, the shell 52 of the constant-current stabilizer 5 is set
It sets in groove.
Preferably, the aligning inner of the inner wall of shell 52 and heat exchanger tube 6.By alignment, so that heat transfer tube wall face table
Reach on face in the same plane, guarantees the smooth of surface.
Preferably, the thickness of shell 52 is less than the depth of groove, heat transfer tube wall face can be made to form groove in this way,
To carry out augmentation of heat transfer.
Further there is choosing, as shown in figure 5, heat exchanger tube 6 is welded for multi-segment structure, the junction setting of multi-segment structure is steady
Flow device 5.This mode makes being simple to manufacture for the heat exchanger tube that constant-current stabilizer is arranged, and cost reduces.
It is learnt by analyzing and testing, the spacing between constant-current stabilizer 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, the outer diameter of pipe can not it is excessive or
Too small, 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, preferentially full
The normal flow resistance of foot (total pressure-bearing be 2.5Mpa hereinafter, the on-way resistance of single heat exchange tube be less than or equal to 5Pa/m)
In the case of, so that being optimal of damping noise reduction, has arranged the optimal relationship of parameters.
The distance between adjacent constant-current stabilizer is S, and the length of constant-current stabilizer is C, and the outer diameter of heat exchanger tube is W, constant-current stabilizer
Tube outer diameter be D, meet following require:
S/C=a-b*LN (W/D)；Wherein LN is logarithmic function, and a, b are parameters, wherein 8 < a < 9,3 <b < 4；It is further excellent
Select 8.3 < a < 8.6,3.2 <b < 3.8；
Wherein the interval S of constant-current stabilizer is the both ends the distance between opposite with adjacent constant-current stabilizer；I.e. front current stabilization fills
The distance between the front end of the tail end set and constant-current stabilizer below.Referring specifically to the mark of Fig. 4.
34mm<W<58mm；
7mm<D<12mm；
14mm<C<23mm；
50mm<S<70mm。
Preferably, heat exchanger tube length L is between 3000-9000mm.Further preferably, between 4500-6000mm.
Further preferably, 40mm < W < 50mm；
9mm<D<10mm；
18mm<C<20mm；
55mm<S<60mm。
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.
Further preferably, as the increase of W/D, a are continuously increased, b constantly reduces.
Further preferably, as the increase of vapour phase volume ratio, a constantly reduce, b constantly increases.
Preferably, the volume ratio of the vapour phase of heat exchange tube inlet is no more than 50%.Further preferred heat exchange tube inlet
The volume ratio of vapour phase is no more than 30%.The volume ratio of the vapour phase of further preferred heat exchange tube inlet is between 5%-25%.
Further preferably, a=8.5, b=3.7.
For parameters such as other parameters, such as tube wall, shell wall thickness according to normal standard setting.
Preferably, fluid is water in shell side.
Preferably, tube side inner fluid speed 8-30m/s.
Preferably, the length L of heat exchanger tube and the diameter of the housing ratio of heat exchanger are 6-10.
Preferably, pipe 51 extends in the whole length direction of constant-current stabilizer 5.I.e. the length of pipe 51 is filled equal to current stabilization
Set 5 length.
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 vehicle repair major flow tube shell type heat exchanger, including shell, the shell both ends are respectively set end socket, the end socket and
Tube sheet is arranged in the link position of shell, and heat exchanger tube connects the tube sheet at both ends, the energy in heat transfer process of the vapour phase in stream-liquid two-phase flow
Enough it is condensed into liquid phase, which is characterized in that stream-liquid two-phase flow flows in tube side, and constant-current stabilizer is arranged in the heat exchanger tube, described
Constant-current stabilizer includes core and shell, and in the shell, the shell is connected and fixed with heat transfer tube wall, described for the core setting
Core is composed of together a number of pipe adjoining；The distance between adjacent constant-current stabilizer is S, constant-current stabilizer
Length is C, and the outer diameter of heat exchanger tube is W, and the pipe diameter of constant-current stabilizer is D, meets following require:
S/C=a-b*LN (W/D)；Wherein LN is logarithmic function, and a, b are parameters, wherein 8 < a < 9,3 <b < 4；
Wherein the distance between adjacent constant-current stabilizer refers to opposite the distance between the both ends of adjacent constant-current stabilizer；
34<W<58mm；
7<D<12mm；
14<C<23mm；
50<S<70mm。
2. heat exchanger as described in claim 1, which is characterized in that a=8.5, b=3.7.
3. heat exchanger as described in claim 1, which is characterized in that adjacent pipe is by being welded together.
4. heat exchanger as described in claim 1, which is characterized in that aperture is arranged between adjacent pipe and realizes perforation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710168108.5A CN107869924B (en) | 2017-03-21 | 2017-03-21 | A kind of shell-and-tube heat exchanger of the condensable multitube constant-current stabilizer of vapour phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710168108.5A CN107869924B (en) | 2017-03-21 | 2017-03-21 | A kind of shell-and-tube heat exchanger of the condensable multitube constant-current stabilizer of vapour phase |
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| CN107869924B true CN107869924B (en) | 2019-01-18 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966053B (en) * | 2017-04-21 | 2019-03-08 | 青岛金玉大商贸有限公司 | A kind of condensable porous type constant-current stabilizer heat exchanger |
| CN107966052B (en) * | 2017-04-21 | 2019-03-08 | 青岛金玉大商贸有限公司 | Condensable porous current stabilizer heat exchanger with variable length |
| CN107966051B (en) * | 2017-04-21 | 2019-04-02 | 青岛金玉大商贸有限公司 | A kind of condensable porous type constant-current stabilizer heat exchanger of spacing variation |
| CN110631266B (en) * | 2018-07-07 | 2020-08-18 | 威海文海节能科技有限公司 | Solar water heater with variable distance between condensing end stabilizing devices |
| CN109855451B (en) * | 2018-07-20 | 2020-10-23 | 国网山东省电力公司聊城供电公司 | Steam heat exchanger capable of uniformly distributing flow |
| CN109855453B (en) * | 2018-07-20 | 2020-03-17 | 国网山东综合能源服务有限公司 | Vapor-liquid two-phase flow shell-and-tube heat exchanger |
| CN109855450B (en) * | 2018-07-20 | 2020-08-18 | 国网山东综合能源服务有限公司 | Design method for tube spacing of non-condensable gas shell-and-tube heat exchanger |
| CN109855452B (en) * | 2018-07-20 | 2020-03-17 | 国网山东综合能源服务有限公司 | Shell-and-tube heat exchanger containing non-condensable gas |
| CN109855449B (en) * | 2018-07-20 | 2020-06-26 | 国网山东省电力公司聊城供电公司 | Shell-and-tube heat exchanger for generating steam |
| CN109798789A (en) * | 2019-03-12 | 2019-05-24 | 上海发电设备成套设计研究院有限责任公司 | A kind of high temperature and pressure heat exchanger and its working method |
| CN111238258B (en) * | 2020-01-09 | 2021-03-23 | 安徽工业大学 | High-pressure-bearing self-cleaning heat exchanger and manufacturing method thereof |
| CN115574649B (en) * | 2022-11-24 | 2023-03-14 | 四川科新机电股份有限公司 | Double-tube-plate heat exchanger and machining and forming method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4318240C2 (en) * | 1993-06-02 | 1998-05-20 | Wieland Werke Ag | Steam heated heat exchanger |
| CN201449176U (en) * | 2009-06-29 | 2010-05-05 | 山东宏易城实业有限公司 | High-efficient double-corrugated turbulent heat exchanger |
| US20140262172A1 (en) * | 2013-03-14 | 2014-09-18 | Koch Heat Transfer Company, Lp | Tube bundle for shell-and-tube heat exchanger and a method of use |
| CN204944237U (en) * | 2015-07-21 | 2016-01-06 | 天津霍普环保科技有限公司 | A kind of waste gas afterheat recovery unit |
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