CN107270747A - A kind of burner exhaust heat of heat exchange structure spacing change utilizes heat-exchanger rig - Google Patents
A kind of burner exhaust heat of heat exchange structure spacing change utilizes heat-exchanger rig Download PDFInfo
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- CN107270747A CN107270747A CN201710328228.7A CN201710328228A CN107270747A CN 107270747 A CN107270747 A CN 107270747A CN 201710328228 A CN201710328228 A CN 201710328228A CN 107270747 A CN107270747 A CN 107270747A
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- Prior art keywords
- heat exchange
- heat
- pipe
- core body
- exchanger rig
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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
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- 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
-
- 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
- F28F1/006—Tubular elements; Assemblies of tubular elements with variable shape, e.g. with modified tube ends, with different geometrical features
-
- 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
- F28F1/02—Tubular elements of cross-section which is non-circular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Heat-exchanger rig is utilized the invention provides a kind of burner exhaust heat, including heat exchange core body, the heat exchange core body is arranged in waste gas flue, the heat exchange core body includes pipe, and the pipe is arranged perpendicular to exhaust gas flow direction, and multiple scattered heat exchange structures are arranged at intervals in the pipe, along the flow direction of circle tube fluid, multiple scattered heat exchange structures are set in pipe, and from the entrance of pipe to the outlet of pipe, the distance between adjacent scattered heat exchange structure is shorter and shorter.Heat-exchanger rig of the present invention, the spacing of scattered heat exchange structure in pipe constantly reduces with the distance apart from pipe entrance, can effectively reduce the film boiling phenomenon of water side, adds water side convection heat transfer intensity, the thermic load of heat exchange core body is reduced, heat exchange efficiency is improved.
Description
Technical field
The invention belongs to field of heat exchange, and in particular to a kind of pipe shell type heat exchange device of UTILIZATION OF VESIDUAL HEAT IN.
Background technology
Nearly ten years, due to energy shortage, as energy conservation is further carried out.It is various new, save the advanced type of furnace day
Become perfect, and use after the high-quality insulation materials such as refractory fibre so that stove radiation loss is decreased obviously.Using advanced
Burner enhances burning, reduces imperfect combustion amount, and air-fuel ratio is also tended to rationally.However, reduction exhaust gas heat loss becomes estranged
The technology of Mist heat recovering is still in progress unhappy.In order to further improve the thermal efficiency of kiln, energy-saving purpose is reached, is returned
It is also an important energy saving way to receive fume afterheat.
Flue gas is the main path that general energy consumption equipment wastes energy, such as boiler exhaust gas consumes energy about 15%, and its
Mainly power consumption is all by fume emission for forming machine, dryer and kiln of his equipment such as dyeing etc..Fume afterheat
The heat that flue gas is carried mainly is converted into utilizable heat by recovery by certain heat exchange mode.
Flue gas waste heat recovery approach is generally using two kinds of methods:One kind is pre- heated work pieces；Two kinds are that preheated air is helped
Combustion.Smoke pre-heating workpiece need to take larger volume and carry out heat exchange, suffer from the limitation of Active workings.Preheated air is combustion-supporting
It is a kind of preferable method, is generally disposed on heating furnace, also can overheavy firing, the programming rate of quickening stove, raising stove
Thermal property.
China is vast in territory, and weather is complicated with terrain environment, and Engines Used In Special Vehicle transmission system faces rubs under environment of extremely trembling with fear
The unfavorable factor such as engine ignition difficulties under the secondary locking of wiping, insufficient lubrication, the decline of storage battery power supply ability and hypobaric, greatly
The big reliability for reducing vehicle.Warmer transmits heat as a kind of combustion heat-exchange device by coolant, can be extreme
The cooling system of vehicle, lubricating system, transmission system, dynamical system etc. are heated under environment, each system is reached most preferably
Working condition, eliminates the unfavorable factor that vehicle launch faces.Meanwhile, the lightweight of vehicle and the adaptation of a variety of extreme environmental conditions
Property proposes high power density to warmer, highly integrated, efficient low-consume, the requirement of high adaptivity.So both meet technique
Requirement, finally can also obtain significant synthesis energy saving effect.
The problem of existing warmer generally faces heat flow density and relatively low heat exchange efficiency, solves these key to the issues and is to increase
Plus heat exchange area, reduction flow resistance, raising the heat transferring medium temperature difference and convection transfer rate etc., in the case of same volume, pass
System heat exchange structure can not meet real needs, based on background above technology and experimental study, and the present invention proposes a kind of heat exchange dress
Put.
The content of the invention
It is an object of the invention to solve that existing UTILIZATION OF VESIDUAL HEAT IN heat-exchanger rig heat exchange efficiency is low, weight big, it is big to occupy volume,
The problem of resistance to elevated temperatures is poor, proposes a kind of compact conformation, high temperature resistant, the heat-exchanger rig that power density is big, heat exchange efficiency is high.
To achieve these goals, technical scheme is as follows：
A kind of burner exhaust heat utilizes heat-exchanger rig, including heat exchange core body, and the heat exchange core body is arranged in waste gas flue, institute
Stating heat exchange core body includes pipe, and the pipe is arranged perpendicular to exhaust gas flow direction, is arranged at intervals in the pipe multiple scattered
Heat exchange structure, along the flow direction of circle tube fluid, sets multiple scattered heat exchange structures, from the entrance of pipe to circle in pipe
The outlet of pipe, the distance between adjacent scattered heat exchange structure is shorter and shorter.
Preferably, from the entrance of pipe to the outlet of pipe, the distance between adjacent scattered heat exchange structure is shorter and shorter
Amplitude be continuously increased.
Preferably, the scattered heat exchange structure includes core body and shell, the core body is arranged in shell, the shell
It is connected with heat exchange inside pipe wall, the core body includes being arranged in a combination by a number of grid sheet, connects between grid sheet
Connect and to form lattice and delete hole.
Preferably, the core body for separating heat exchange structure is welded by grid sheet.
Preferably, setting intercommunicating pore on the grid sheet, the connection between grate opening is realized by intercommunicating pore.
Preferably, the heat-exchanger rig includes heat exchange core body front supports and heat exchange core body rear supports, the heat exchange
Core body, front supports and rear supports are arranged in waste gas flue, and the front supports and rear core support body are located at respectively to be changed
Hot core body two ends, the gas wing passage of heat-exchanger rig is collectively forming with heat exchange core body.
Preferably, the distance between adjacent scattered heat exchange structure is L, the length for disperseing heat exchange structure is C, heat exchanger tube
A diameter of D, the fluid flow area that lattice delete hole is A, and lattice delete the Zhou Changwei Z of the fluid circulation in hole, meet following require：
L/C=a-b*LN (D/E)；
E=4*A/Z；
Wherein LN is logarithmic function, and a, b is parameter, wherein 4.9<a<6.1,1.3<b<2.1；
The spacing for wherein disperseing heat exchange structure is with the distance between relative two ends of adjacent scattered heat exchange structure；
10<D<18mm；
8<C<15mm；
25<L<35mm。
Preferably, it is square that lattice, which delete hole,.
Preferably, described UTILIZATION OF VESIDUAL HEAT IN heat-exchanger rig is arranged in the waste gas flue of burner, preferably warmer
Flue.
Compared with prior art, it is of the invention to have the following advantages：
1) spacing of the scattered heat exchange structure in heat-exchanger rig of the present invention, pipe with apart from pipe entrance away from
From continuous reduction, the film boiling phenomenon of water side can be effectively reduced, water side convection heat transfer intensity is added, reduces heat exchange core
The thermic load of body, improves heat exchange efficiency.
2) heat-exchanger rig of the present invention, sets lattice to delete formula in heat exchanger tube and disperses in heat exchange structure, exchange heat pipe
Steam water interface is separated, effectively the film boiling phenomenon of reduction water side, is added water side convection heat transfer intensity, is reduced and change
The thermic load of hot core body, improves heat exchange efficiency.
3) heat-exchanger rig of the present invention, heat exchange core body uses tubular heat exchanger tube, and the heat exchanger tube diameter is along cigarette
Flow of air direction is tapered into, and can effectively reduce the film boiling phenomenon of water side, is added water side convection heat transfer intensity, is reduced
The thermic load of heat exchange core body, improves heat exchange efficiency.
4) heat-exchanger rig of the present invention, the heat exchange core body is pipe-flat tube combined type heat exchange structure, heat exchange core body
Front end uses the tubular heat exchange structure of thin-wall circular, multiple rows of thin-walled flat pipe type heat exchange structure is used in heat exchange core body rear end, in different positions
Put according to the different film boiling phenomenons using different heat exchange structures, effectively reduction water side that recept the caloric, reduce heat exchange core body
Thermic load, improve heat exchange efficiency.
5) heat-exchanger rig of the present invention, using the import header and outlet header of flue tube wall formation heat-exchanger rig,
Avoid being separately provided import header and outlet header so that heat-exchanger rig takes up space less, reduction heat exchange core body volume and weight,
Compact conformation.
6) length of the scattered heat exchange structure in heat-exchanger rig of the present invention, pipe with apart from pipe entrance away from
From continuous reduction, the film boiling phenomenon of water side can be effectively reduced, water side convection heat transfer intensity is added, reduces heat exchange core
The thermic load of body, improves heat exchange efficiency.
7) present invention structure for disperseing heat exchange structure is optimized design by substantial amounts of numerical simulation and its experiment
Optimal scattered heat exchange structure optimized dimensions have been obtained, heat exchange efficiency is further improved.
8) heat-exchanger rig of the present invention, heat exchanger upper and lower casing is provided with baffle plate and deflector, for guiding water
Side liquid is flowed by numerical simulation of optimum conclusion, and the liquid into water inlet pipe is in lower house bottom surface and the barrier effect of side board
Under, it is most of to enter in the water wing passage around heat exchange core body, and under the two deflectors shunting of the breach of lower house bottom surface half, by
Heat exchange core body bottom flows through inside pipe and flat tube and enters outlet pipe from bottom to top, is reduced while heat transfer temperature difference is improved
The thermic load of heat exchange core body.Meanwhile, front supports are served into the liquid between front supports and heat exchanger housing cold
But act on, the liquid improved around its reliability, rear supports is exchanged heat with burning and gas-exhausting, improves heat utilization ratio.
9) heat-exchanger rig of the present invention, heat exchanger upper and lower casing uses covered structure in joint, can play
The effect of reinforcement structure stability, upper shell square structure intermediate region is provided with outside square groove, while square structure
Through hole is provided with the baffle plate that forward and backward two ends are set, is easy to heat-exchanger rig internal gas to assemble and discharge to water outlet pipe part, it is to avoid because
Pneumatosis causes the increase of heat-exchanger rig thermic load.
10) a kind of heat-exchanger rig of the present invention, front end sets combuster mounting structure, and rear end is provided with smoke evacuation dress
Mounting flange structure is put, the integrated level of combustion heat-exchange device is improved, is easy to maintenance, maintenance of the burning with heat-exchanger rig.
Brief description of the drawings
Fig. 1 is a kind of front view of embodiment of the heat-exchanger rig of the present invention；
Fig. 2 is a kind of right view of embodiment of the heat-exchanger rig of the present invention；
Fig. 3 is the heat exchange core body water side structure figure of the present invention；
Fig. 4 is the heat exchange core body gas side structure figure of the present invention；
Fig. 5 is the heat exchanger upper shell structure chart of the present invention；
Fig. 6 is the heat exchanger lower house structure chart of the present invention；
Fig. 7 is the scattered heat exchange structure cross-sectional structure schematic diagram of the present invention；
Fig. 8 is that the scattered heat exchange structure of the present invention arranges schematic diagram in heat exchanger tube；
Fig. 9 is another schematic diagram that the scattered heat exchange structure of the present invention is arranged in heat exchanger tube.
Figure 10 is that the scattered heat exchange structure of the present invention arranges cross-sectional view in heat exchanger tube.
In figure：1. heat exchange core body；2. front supports；3. rear supports；4. heat exchanger upper shell；5. heat exchanger lower casing
Body；6. frame baffle plate before upper shell；7. frame baffle plate after upper shell；8. lower house side shield；9. frame baffle plate after lower house；
10. front flow guiding plate；11. after deflector；12. combustion chamber mounting cylinder；13. mounting flange；14. outlet pipe；15. before gas vent；16.
Gas vent afterwards；17. pipe；18. flat tube；19. water side cover plate；20. gas side cover plate；21. straight tooth-shaped turbulent flow piece；22. zigzag wing
Piece；23. upper shell overhead gage；24. upper shell side shield；25. lower house side shield；26. lower house overhead gage；27. lower house
Front flow guiding plate；28. deflector after lower house；29. axial lower baffle plate；30. axial side shield；31. water inlet pipe；32nd, heat exchange is disperseed
Structure, 33 scattered heat exchange structure shells, 34 grate openings, 35 grid sheets, 36 heat exchange core body upper cover plates, 37 import headers, 38 outlets
Header, intermediate member 39, lower cover 40.
Embodiment
The embodiment to the present invention is described in detail below in conjunction with the accompanying drawings.
Herein, if without specified otherwise, being related to formula, "/" represents division, and "×", " * " represent multiplication.
A kind of waste gas heat utilization heat-exchanger rig as shown in figures 1 to 6, including heat exchange core body 1, heat exchange core body front supports 2
With heat exchange core body rear supports 3, the heat exchange core body 1, front supports 2 and rear supports 3 are arranged in waste gas flue 12, described
Heat exchange core body 1 includes upper cover plate 36, lower cover 40 and Duo Gen heat exchanger tubes, and heat exchanger tube connection runs through upper cover plate 36 and lower cover 40,
The front supports 2 and rear supports 3 are located at the two ends of heat exchange core body 1 respectively, and the gas of heat-exchanger rig is collectively forming with heat exchange core body 1
Wing passage；The connection heat exchange core body of front supports 1 upper cover plate 36, lower cover 40 and the tube wall of flue 12, the rear supports 2 connect
Connect heat exchange core body upper cover plate 36, lower cover 40 and the tube wall of flue 12, the front supports 2, rear supports 3, heat exchange core body cover plate
36 and the tube wall of flue 12 be collectively forming the liquid-inlet header 37 and outlet header 38 of heat-exchanger rig.
Heat-exchanger rig of the present invention, regard tube wall as the import header of heat-exchanger rig and a portion of outlet header
Part, using the import header and outlet header of flue tube wall formation heat-exchanger rig, heat-exchanger rig is integrally all disposed within waste gas cigarette
In road, it is to avoid be separately provided import header and outlet header so that heat-exchanger rig take up space it is few, reduction heat exchange core body volume with
Weight, compact conformation.
Preferably, the front supports 2 and rear supports 3 are tubular structure, the tube wall two ends of front supports 2 connection
Cover plate 36,40 and flue tube wall, the tube wall two ends connecting cover plate 36,40 and flue tube wall of rear supports 3.
By being arranged such so that front supports 2 and rear supports 3 form the exhaust gas entrance of heat-exchanger rig exhaust gas side respectively
And waste gas outlet, further such that compact conformation.
Preferably, the tube wall of described front supports 2, rear supports 3 connects the tube wall of flue 12 by intermediate member 39,
The intermediate member 39 is the platy structure of bending, as shown in Figure 1.
Preferably, the water inlet pipe 31 and outlet pipe 14 of the heat-exchanger rig are separately positioned on the tube wall of flue 12 and difference
Connect import header and outlet header.
Preferably, import header 38 is located at the bottom of flue, the pipe of outlet collection 37 is positioned at the top of flue.
Preferably, the heat exchanger tube includes pipe 17, the pipe 17 is arranged perpendicular to exhaust gas flow direction, along useless
Flow of air direction, the diameter of pipe 17 is less and less.If being S apart from the distance of exhaust gas entrance, then the internal diameter of pipe is D, if D=
F (S), then F ' (S)<0, F ' (S) is F (S) first order derivative.
Because the waste air temperature at inlet of UTILIZATION OF VESIDUAL HEAT IN heat-exchanger rig is very high, hence in so that the liquid formation carbonated drink in heat exchanger tube
Mixture, and along the flow direction of flue gas, the vapour phase ratio formed in steam water interface is more and more lower, and liquid phase ratio is more next
It is higher.Because the vapour phase ratio of front end is high, therefore the space occupied is necessarily big, therefore passes through the change of pipe diameter so that change
The pipe cross-sectional area of the front end of thermal is big, so that inner space is sufficient for the distribution of liquid phase and meets heat exchanger tube
The requirement of pressure, it is to avoid front portion heat exchange pipe pressure is excessive, so that integrally all heat exchange overpressures are uniform for heat exchange core body, keeps away
Exempt from, the service life of extension heat-exchanger rig excessive with pressure.
Preferably, then F " (S)>0, F " (S) are F (S) second derivatives.I.e. along exhaust gas flow direction, pipe it is straight
The less and less amplitude in footpath is continuously increased.
It is found through experiments that, passes through upper F " (S)>0 setting, can further meet the pressure point in diverse location pipe
Cloth, is further ensured that heat exchange overpressure is evenly distributed.
Preferably, as shown in figure 3, along the flow direction of flue gas, pipe 17 is set to multiple rows of, and the pipe 17 is mistake
Spacing between array structure, the center of circle of adjacent pipe 17 is 1.1-1.3 times of the external diameter of pipe 17.The external diameter of pipe 17 is adjacent two
The average value of heat exchanger tube external diameter.
Preferably, along exhaust gas flow direction, the diameter of latter row's pipe 17 is the 0.93- of adjacent front-seat pipe diameter
0.98 times.
Above-mentioned proportionate relationship is the optimal proportionate relationship by substantial amounts of experiment.Pass through above-mentioned caliber and spacing
The setting of size, enables to pressure distribution to be optimal.
Preferably, the intake channel of the formation gas of front supports 2 side, the exit passageway of the formation gas of rear supports 3 side.
Preferably, the heat exchanger tube includes the multiple scattered heat exchange structures 32 of subsection setup in pipe 17, the pipe 17,
The scattered heat exchange structure 32 includes core body and shell 33, and the core body is arranged in shell 33, the shell 33 and pipe 17
Inwall is connected, and the core body includes the connection between a number of grid sheet 35, grid sheet 35 and forms lattice and delete hole 34.
Because EGT is very high so that the flow in pipe can form stream-liquid two-phase flow, the present invention is set in pipe
The scattered heat exchange structure of grid heat exchange, is separated the liquid and gas in two-phase fluid by scattered heat exchange structure, by liquid phase
Small liquid group is dispersed into, by gas phase dispersion into minute bubbles, suppresses the backflow of liquid phase, promotes gas phase smooth outflow, play regime flow
Effect, the effect with vibration and noise reducing.Meanwhile, the present invention is by setting grid to disperse heat exchange structure, equivalent in heat exchanger tube
Inner fin is inside added, heat exchange is enhanced, improves heat transfer effect.
The present invention is because all cross-section locations by gas-liquid two-phase in all heat exchanger tubes are disperseed, so that whole
The contact area of gas-liquid interface and the scattered and cooling wall of gas phase boundary is realized on heat exchange tube section and strengthens disturbance, greatly
Big reduces noise and vibrations, enhances heat transfer.
Preferably, the core body of the scattered heat exchange structure 32 is to be integrally formed.
Preferably, the core body of the scattered heat exchange structure 32 is welded by grid sheet 35.
Preferably, preferably, setting intercommunicating pore on the grid sheet 35.Realized by intercommunicating pore between grate opening 34
Connection.
, can be between homogeneous lattice gate hole by setting intercommunicating pore, it is ensured that interconnected between adjacent grate opening
Pressure so that the fluid of high pressure runner flows to low pressure, while it is gentle further to separate liquid phase while flow of fluid
Phase, is conducive to further stablizing two-phase flow.
Preferably, along the flow direction (i.e. Fig. 8 short transverse) of fluid in pipe 17, pipe 17 is interior to set multiple
Scattered heat exchange structure 32, from the entrance of pipe to the outlet of pipe, the distance between adjacent scattered heat exchange structure is shorter and shorter.If
It is H apart from the distance of pipe entrance, the distance between adjacent scattered heat exchange structure is L, L=F1(H), i.e. L is using height H as change
The function of amount, L ' is L first order derivative, meets following require：
L’<0；
Main cause is because the gas in pipe understands carrier's liquid, in uphill process, pipe in uphill process
It is constantly heated, cause the gas in biphase gas and liquid flow more and more, because the vapour phase in stream-liquid two-phase flow is more and more, pipe
Interior exchange capability of heat can increase with vapour phase and weaken relatively, and vibrations and its noise also can constantly increase as vapour phase increases
Plus.Therefore need the distance between the adjacent scattered heat exchange structure of setting shorter and shorter.
In addition, exporting to upper header this section from pipe, because the space of this section becomes big suddenly, the change in space can be led
The quick of gas is caused to flow upwards out and assemble, therefore spatial variations can cause the vapour phase (vapour group) of aggregation to enter cold from pipe position
Aggegation pipe, due to gas (vapour) liquid density contrast, air mass leaves adapter position and will moved rapidly upward, and the former locus of air mass is by gas
The liquid that group pushes away wall also by rapid resilience and hits wall simultaneously, formation impingement phenomenon.Gas (vapour) liquid phase is more discontinuous, gas
Reuniting, collection is bigger, and water hammer energy is bigger.Impingement phenomenon can cause larger noise to shake and mechanical shock, and equipment is caused brokenly
It is bad.Therefore in order to avoid the generation of this phenomenon, the distance between adjacent scattered heat exchange structure now set is shorter and shorter, from
And constantly separate gas phase and liquid phase in fluid delivery process, so as to reduce vibrations and noise to the full extent.
It is found through experiments that, by above-mentioned setting, vibrations and noise can be both reduced to the full extent, while can carry
High heat transfer effect.
Further preferably, from the entrance of pipe 17 to the outlet of pipe 17, the distance between adjacent scattered heat exchange structure is more
It is continuously increased come shorter amplitude.That is S " is S second derivative, meets following require：
L”>0；
It is found through experiments that, by being arranged such, can further reduces by 10% or so vibrations and noise, improves simultaneously
11% or so heat transfer effect.
Preferably, each the length of scattered heat exchange structure 32 keeps constant.
Preferably, in addition to the distance between adjacent scattered heat exchange structure 32, disperseing the other parameters of heat exchange structure
(such as length, caliber) keeps constant.
Preferably, along the short transverse of pipe 17, pipe 17 is interior to set multiple scattered heat exchange structures 32, from pipe 17
Entrance to the outlet of pipe 17, the length for disperseing heat exchange structure 32 is increasingly longer.The length for disperseing heat exchange structure is C, C=
F2(X), C ' is C first order derivative, meets following require：
C’>0；
Further preferably, from the entrance of pipe to the outlet of pipe, the length increasingly longer amplitude of heat exchange structure is disperseed
It is continuously increased.That is C " is C second derivative, meets following require：
C”>0；
The change of the distance between for example adjacent scattered heat exchange structure of specific reason is identical.
Preferably, the distance between adjacent scattered heat exchange structure keeps constant.
Preferably, except the length for disperseing heat exchange structure is outside one's consideration, disperse the other parameters of heat exchange structure (such as between adjacent
Away from, caliber etc.) keep constant.
Preferably, along the short transverse of pipe 17, pipe 17 is interior to set multiple scattered heat exchange structures, from pipe 17
The hydraulic diameter for the grate opening 41 that entrance disperses in heat exchange structure 32 to the outlet of pipe 17, difference is less and less.Disperse to change
The grate opening hydraulic diameter of heat structure is Z, Z=F3(X), Z ' is Z first order derivative, meets following require：
Z’<0；
Preferably, from the entrance of pipe to the outlet of pipe, disperseing the grate opening hydraulic diameter of heat exchange structure increasingly
Small amplitude is continuously increased.I.e.
Z " is Z second derivative, meets following require：
Z”>0。
The change of the distance between for example adjacent scattered heat exchange structure of specific reason is identical.
Preferably, the length of scattered heat exchange structure and the distance of adjacent scattered heat exchange structure keep constant.
Preferably, in addition to disperseing the grate opening hydraulic diameter of heat exchange structure, disperseing the other parameter (examples of heat exchange structure
Such as the distance between length, adjacent scattered heat exchange structure) keep constant.
Further preferably, as shown in figure 3, the inside of the pipe 17 sets groove, the shell of the scattered heat exchange structure 32
33 are arranged in groove.
Preferably, the aligning inner of the inwall of shell 33 and pipe 17.Pass through alignment so that on the surface of round tube inner wall face
Reach in approximately the same plane, it is ensured that surface it is smooth.
Preferably, the thickness of shell 33 is less than the depth of groove, round tube inner wall face can be so caused to form groove, from
And carry out augmentation of heat transfer.
Further preferably, as shown in figure 4, pipe 17 is welded for multi-segment structure, the junction of multi-segment structure, which is set, to be divided
Dissipate heat exchange structure 32.This mode causes being simple to manufacture for the pipe for setting scattered heat exchange structure, cost reduction.
By analysis and experiment learn, disperse heat exchange structure between spacing can not be excessive, it is excessive if cause damping
The effect of noise reduction is bad, while can not be too small, it is too small if cause resistance excessive, similarly, the external diameter of grate opening can not mistake
Big or too small, the effect for also resulting in damping noise reduction is bad or resistance is excessive, therefore the present invention is by substantial amounts of experiment,
Preferentially meet normal flow resistance (total pressure-bearing be below 2.5Mpa, or single pipe on-way resistance be less than or equal to 5Pa/
M in the case of) so that being optimal of damping noise reduction, the optimal relation of parameters has been arranged.
Preferably, the distance between adjacent scattered heat exchange structure is L, the length for disperseing heat exchange structure is C, heat exchanger tube
A diameter of D, the fluid flow area that lattice delete hole is A, and lattice delete the Zhou Changwei Z of the fluid circulation in hole, meet following require：
L/C=a-b*LN (D/E)；
E=4*A/Z；
Wherein LN is logarithmic function, and a, b is parameter, wherein 4.9<a<6.1,1.3<b<2.1；
10<D<18mm；
8<C<15mm；
25<L<35mm。
Preferably, 5.4<a<5.8,1.6<b<1.9；
Preferably, a=5.52, b=1.93.
The interval S for wherein disperseing heat exchange structure is with the distance between relative two ends of adjacent scattered heat exchange structure；Before i.e.
Face disperses the distance between the front end of the tail end of heat exchange structure with disperseing heat exchange structure below.Referring specifically to Fig. 9 mark.
The diameter D of heat exchanger tube refers to the average value of internal diameter and external diameter.
Preferably, pipe length S is between 140-200mm.Further preferably, between 160-180mm.
By the preferred of the optimal geometric scale of above-mentioned formula, it can realize under the conditions of meeting normal flow resistance,
Damping noise reduction reaches optimum efficiency.
Further preferably, as D/E increase, a constantly reduce, b constantly increases.
For other parameters, the parameter such as tube wall, housing wall thickness is set according to normal standard.
Preferably, whole length direction extension of the grate opening 34 in scattered heat exchange structure 32.That is the length of grate opening 34
Equal to the length of scattered heat exchange structure 32.
, can further augmentation of heat transfer by above-mentioned setting, it is possible to increase heat exchange efficiency.
Preferably, the heat exchange inside pipe wall sets groove, the shell of the scattered heat exchange structure is arranged in groove, institute
State the inwall of shell and the aligning inner of pipe.
Preferably, except the grate opening of the formation of shell 33, it is square that remaining lattice, which deletes hole,.
Preferably, described heat exchanger tube includes pipe 17 and flat tube 18, the pipe 17 is distributed in the front end of flat tube 18.
I.e. along the flow direction of waste gas, pipe 17 and flat tube 18 are sequentially distributed.
Main reason is that exhaust gas entrance side temperature is high, therefore liquid easily seethes with excitement, so that stream-liquid two-phase flow is formed, because
Pipe is shaped as circle, and in the case of identical heat exchange area, pipe circulation area is big so that bearing capacity ability is strong, and
With the heat exchange of flue gas, the flue-gas temperature of rear end is relatively low, therefore can use flat tube, flat tube because being shaped as prolate shape,
Free air space is small, and liquid will not seethe with excitement in rear end, therefore does not need big passage to meet pressure requirements, and flat tube heat-transfer surface
Product is big, so that augmentation of heat transfer.Therefore the distribution of flat tube and pipe is passed through so that pressure distribution is relative on the whole for heat-exchanger rig
Uniformly, it is to avoid it is excessive pressure occur, and exchange capability of heat relative increase.
Preferably, the fluid flow area of single pipe is more than single flat tube.
Preferably, the fluid flow area of single pipe is 2-3 times of single flat tube circulation area.
Preferably, described pipe 17 is positioned on front side of heat exchange core body, pipe 17 is often arranged with multiple rows of and contains multiple pipes
17, adjacent two rows pipe 17 is interspersed.18 points described of flat tube is multiple rows of to be arranged in after heat exchange core body close to pipe heat exchange structure
Side, often arranges and contains multiple flat tubes 18, and the forward and backward one-to-one corresponding of adjacent two rows of flat pipes.
Flow direction of the bearing of trend of flat tube 18 parallel to flue gas.
Preferably, flow direction of the flow direction of liquid all perpendicular to waste gas in the pipe 17 and flat tube 18.
Preferably, setting fin inside flat tube, flow channel for liquids in flat tube is divided into multiple small flow channels.Preferably, edge
The small flow channels hydraulic diameter in the direction of waste gas flowing, different flat tubes constantly diminishes.If being S apart from the distance of exhaust gas entrance,
Then the hydraulic diameter of flat tube small flow channels is d, if d=F (S), then F ' (S)<0, F ' (S) is F (S) first order derivative.
Main cause is to need the pressure born less and less in the flow direction along waste gas, flat tube, therefore can be by
Hydraulic diameter diminishes, and by the way that hydraulic radius is diminished, can increase heat exchange area, improves exchange capability of heat.Therefore by upper
The setting of feature is stated, pressure requirements can be both met, augmentation of heat transfer can be realized again.
Preferably, along exhaust gas flow direction, the hydraulic diameter of flat tube small flow channels is continuously increased for d amplitude.That is F "
(S)>0, F " (S) are F (S) second derivatives.
For F " (S)>0, heat transfer effect can be significantly improved, and realize pressure balance.Above-mentioned result is by big
The conclusion that the numerical simulation of amount and experiment are obtained.
Preferably, preferably, the small flow channels hydraulic radius in the direction flowed along liquid, same flat tube constantly becomes
It is small.If being S apart from the distance of exhaust gas entrance, then the hydraulic diameter of flat tube small flow channels is d, if d=F (S), then F ' (S)<0, F '
(S) be F (S) first order derivative.
Preferably, along exhaust gas flow direction, the hydraulic diameter of same flat tube small flow channels is continuously increased for d amplitude.
Then F " (S)>0, F " (S) are F (S) second derivatives.Concrete reason is as above.
Preferably, the small flow channels cross section in flat tube is rectangle, size is 2x4mm.
Preferably, the small flow channels cross section between flat tube is triangle.
Preferably, front supports are hollow side-circle transition structure with rear supports, a side end face is square, side
End face is circle, wherein, the square end surface of front supports is connected and fixed with the side end face of heat exchange core body pipe one, seals, circular
End face at the mounting cylinder rear end face air outlet of anterior combustion chamber with fixing, sealing；The square end surface of rear supports and heat exchange core body are flat
The side end face of pipe one is connected and fixed, seals, and circular end face at aft flange device air outlet with fixing, sealing.
Preferably, described UTILIZATION OF VESIDUAL HEAT IN heat-exchanger rig is arranged in the waste gas flue of burner, preferably warmer
Flue.
Preferably, the waste gas flue 12 is combustion chamber mounting cylinder 12.
Preferably, the exhaust gas entrance temperature of heat-exchanger rig is 1200-1400 degrees Celsius, preferably 1300 degrees Celsius.Make
To be preferred, front-seat pipe is high temperature resistant stainless steel.
Preferably, the heat-exchanger rig sets exhaust outlet 15,16, the exhaust outlet 15 is arranged on the waste gas cigarette of upper collecting chamber
On the tube wall in road 17, the exhaust outlet 16 is arranged on outlet pipe.Preferably, exhaust outlet 15,16 is automatic according to pressure condition
Exhaust.
Particularly preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
Involved heat-exchanger rig includes heat exchange core body 1 in this preferred embodiment, and front supports 2, rear supports 3, heat is handed over
Change before body upper shell 4 and the upper shell set thereon frame baffle plate 7 after frame baffle plate 6, upper shell, heat exchanger lower house 5 and
Frame baffle plate 9, front flow guiding plate 10, rear deflector 11, water inlet pipe 31, water outlet after the lower house side shield 8 that sets thereon, lower house
Pipe 14, combustion chamber mounting cylinder 12, mounting flange 13 etc..
The heat exchange core body 1 is thin wall-type pipe-pipe band combination heat exchange structure, and pipe 17 is liquid flow with the inside of flat tube 18
Dynamic region, the region between pipe and pipe, flat tube and flat tube is to be set between gas flow area, the adjacent flat tube per rows of flat pipes
Serrated fin 22 is equipped with, for increasing gas wing passage heat exchange area, flat tube is internally provided with the turbulent piece 21 of straight tooth-shaped, for increasing
Plus the disturbance to working fluid.The front supports 2, rear supports 3 square end surface respectively with the gas flow region of heat exchange core body 2
Domain both ends of the surface are by being welded and fixed, and the circular end face of front supports 2 and the back end surface gas outlet of combustion chamber mounting cylinder 12 connect
Connect, fix, the circular end face of rear supports 3 is alignd and fixed, the heat exchanger with mounting flange minor diameter end face circular hole
Upper shell 4 is relative with heat exchange core body water wing passage, on the upside of heat exchange core body 1 and supporter (2,3), the heat exchanger lower casing
Body 5 is located at heat exchange core body 2 with the downside of supporter (2,3), being fixed with heat exchanger upper shell 4 at the free margins of both sides.Upper and lower shell
Fix, seal with the lateral surface of combustion chamber mounting cylinder 12, the smaller diameter end lateral surface of mounting flange 13 respectively in body (4,5) front and rear end.
The preceding frame baffle plate 6 of heat exchanger upper shell, rear frame baffle plate 7 are fastened transversely to the forward and backward of projected square part according to hull shape
Two ends, the heat exchanger lower house side shield 25 is located at the front end of projected square part, and arranged on left and right sides is each to fix one, the heat
Frame baffle plate 9 is fastened transversely to water conservancy diversion before the rear end of projected square part, described stairstepping according to hull shape after permutoid lower house
Plate 10, rear deflector 11 are fixed on the bottom surface of heat exchanger lower house 5, region, baffle plate and deflector corresponding to the pipe of heat exchange core body 2
It is provided commonly for tissue liquid flow field.The water inlet pipe 31, outlet pipe 14 respectively with heat exchanger upper shell 4, heat exchanger lower casing
Body 5 is connected, as heat-exchanger rig with the external world be connected bridge, with heat exchanger housing 4 and 5, the liquid flow region of heat exchange core body 1 and
Core support body 2 and 3 is collectively forming water side runner.The combustion chamber mounting cylinder 12, front supports 2, the flowing of the gas of heat exchange core body 1
Region, rear supports 3, mounting flange 13 collectively constitute gas side runner.The heat-exchanger rig is while fluid interchange is realized, tool
The characteristics of having high temperature resistant, compact conformation, heat exchange efficiency and high power density.
Specifically, seeing Fig. 3 and Fig. 4, heat exchange core body includes the forward and backward staggered high temperature resistant stainless steel pipe 17,2 of 3 rows
Arrange stainless steel flat tube 18,2 water side cover plates 19,2 gas side cover plates 20,42 serrated fins 22,40 of forward and backward alignment
The turbulent piece 21 of individual straight tooth-shaped, the wherein first row in pipe heat exchange structure and the 3rd row's pipe quantity are 9, second row pipe quantity
For 8, it in 1mm, flat tube heat exchange structure per rows of flat pipes quantity is 21 that pipe wall thickness, which is, and flat tube wall thickness is 0.5mm, straight tooth-shaped turbulent flow piece
21 and serrated fin 22 are all absolute construction, are individually fixed in using soldering processes on the medial surface of flat tube 18 and lateral surface.Water
The circular hole and elongated hole consistent with the quantity of flat tube 18 with pipe 17, aperture and pipe and flat tube matching size are provided with side cover plate 19
Close, the side edge thereof of water side cover plate 19 and gas side cover plate 20 is provided with 90 ° of flangings, be easy to fix.Each part of heat exchange core body 1 passes through
Soldering processes are fixed and sealed, and with good intensity and manufacturability feature, the volume of the heat exchange core body 1 after welding is
160 × 180 × 168 (mm), heat exchange area is 3.62m2, heat exchange efficiency is up to 92%.
Specifically, the front supports 2 and rear supports 3 are hollow side-circle transition structure, a side end face be it is square,
One side end face is circle, wherein, the square end surface of front supports 2 is connected and is welded and fixed with the front end face of heat exchange core body 1, seals,
Circular end face, which is inserted in after the small diameter cylinder of combustion chamber mounting cylinder 12, to be welded and fixed, seals；The square end surface of rear supports and heat exchange
Core back-end face is docked and is welded and fixed, seals, and circular end face is welded and fixed in the front end face air inlet of mounting flange 13, close
Envelope, it is preferred that back and front supporting body thickness is 1.5mm.
Specifically, the heat exchanger upper shell 4, the hull shape of heat exchanger lower house 5 and the front support after fixation
Body 2, heat exchange core body 1, rear supports 3 are similar, and front portion is circle, and-square transition structure, centre are square structure, the rear portion side of being-justified
Structure is crossed, upper shell 4 can surround core support body (2,3) and heat exchange core body 1 after being docked with the two sides free margins of lower house 5
Wherein, and after fixing, seal with combustion chamber mounting cylinder lateral surface, mounting flange miner diameter end lateral surface it is collectively forming heat-exchanger rig
Gas wing passage.
Specifically, seeing Fig. 2, heat exchanger upper shell 4, the two sides free margins joint of heat exchanger lower house 5 are covering
One side plane of fixed structure, i.e. upper shell, to external expansion and with downward extension, is used as preferred expansion near joint
Open up distance it is identical with thickness of shell, another side plane of lower house has downward extension, and two extensions are fixed, when it is upper,
Lower house forms the structure mutually covered when docking at butt joint edge, is easy to be welded and fixed, while it is steady to play reinforcement structure
Qualitatively act on.
Specifically, heat exchanger upper shell 4 justify-square transition structure bottom surface closed at front end face provided with attached seat is vented, be easy to
Exclude the air in the water side runner of front end.The square structure intermediate region of heat exchanger upper shell 4 is provided with outside square groove,
It is easy to gathering and discharging for heat-exchanger rig internal gas.The square groove central area of heat exchanger upper shell 4 is provided with circle and gone out
Circular inlet opening is provided with water hole and the attached seat mounting hole of sensor, circle-side's transition structure of lower house its right end face front end, is entered
Water hole is identical with water outlet bore dia, for installing water pipe, meanwhile, the attached seat mounting hole of sensor is provided with into and out of water hole side, for pacifying
The attached seat of sensor is filled, is easy to gather heat-exchanger rig water-in and water-out temperature.Outlet pipe 14 on heat exchanger upper shell 4 is set
The attached seat of exhaust is equipped with, is easy to heat-exchanger rig to discharge air.
Specifically, seeing Fig. 5, heat exchanger upper shell 4 is provided with frame baffle plate 6 and upper shell before structure identical upper shell
Frame baffle plate 7, is made up of, the upper middle zone of overhead gage 23 1 upper shell overhead gage 23 and 2 upper shell side shields 24 respectively afterwards
Domain is provided with the semi-circular hole through baffle plate, is easy to the gas in the front space of overhead gage 23 to discharge heat-exchanger rig by this hole.Before
The overhead gage 23 of frame baffle plate 6 is placed horizontally in where the square structure front end of heat exchanger upper shell 4, the front end face of heat exchange core body 1
Plane, its length is the distance between upper shell two sides, highly identical with the distance between upper shell and the upper cover plate of heat exchange core body 1,
It is fixed on the medial surface of heat exchanger upper shell 4；The side shield 24 of preceding frame baffle plate 6 be located at the preceding rear portion of 6 overhead gage of frame baffle plate 23,
The heat exchange core body left and right sides, its height is consistent with place square structure side, width and the side of upper shell 4 to heat exchange core body homonymy
The distance in face is identical, on the front end face of overhead gage 23 for being fixed on the medial surface of heat exchanger upper shell 4 and preceding frame baffle plate 6.Equally
, the front end face of overhead gage 23 of rear frame baffle plate 7 is located at plane where the rear end face of heat exchange core body 1, the side shield of rear frame baffle plate 7
24 front end faces are located at plane where the rear end face of overhead gage 23 of rear frame baffle plate 7.
Specifically, seeing Fig. 6, heat exchanger lower house 5 is provided with lower house side shield 25, lower house overhead gage 26, lower casing
Deflector 28 (i.e. Fig. 1 deflector 12) after body front flow guiding plate 27 (i.e. Fig. 1 deflector 11), lower house, axial lower baffle plate 29,
Axial side shield 30.Heat exchanger lower house 5 with upper shell square structure front and back ends arranged on left and right sides close positions at set
There is side shield 25, its architectural feature is identical with upper shell side shield 24, when upper and lower casing is docked, two housings same position
Side shield is forward and backward overlapping, i.e., upper shell baffle plate trailing flank is overlapped with lower house baffle plate leading flank.On the bottom surface of lower house rear end, after
Lower house overhead gage 26 is horizontally arranged with before side shield 25, the trailing flank of overhead gage 26 is overlapped with side shield front end face, under being fixed on
On the inside of housing bottom surface, without perforate in the middle of lower baffle plate.Axial lower baffle plate 29 is weldingly fixed on the nose circle of heat exchanger lower house 5-side
Changeover portion inside bottom surface intermediate region, axial side shield 30 is fixedly welded at lower house right flank intermediate altitude, water inlet position
In baffle plate bottom, axial lower baffle plate 29 is consistent with front supports axial length with the axial length of side shield 30.Water conservancy diversion before lower house
Deflector 28 is fastened transversely on the bottom surface of heat exchanger lower house 5 after plate 27, lower house, length and heat exchanger lower house bottom surface
Width is consistent, and deflector is the 1/2 of opposite side height positioned at the height of the longitudinal vertical plane right part of heat-exchanger rig central shaft.
On heat-exchanger rig axial direction, lower house front flow guiding plate 27 is placed on puts down with plane where two row's pipe axle center before heat exchange core body 1
In capable and equidistant plane, deflector 28 is placed on the second row pipe axle center of heat exchange core body 1 institute in the plane after lower house.
Preferably, the height of lower baffle plate 29 is in the axial direction with the distance between the bottom surface of front supports 2 and heat exchanger lower house 5
And change, to ensure that the distance between lower baffle plate 29 and front supports is consistent in the axial direction, expired by fluid flow herein
Sufficient design requirement.
Preferably, the axial height of side shield 30 is in the axial direction between the right flank of front supports 2 and heat exchanger lower house 5
Distance and change, to ensure that the distance between axial side shield 30 and front supports is consistent in the axial direction, by herein
Fluid flow meets design requirement.
The purpose for setting deflector and baffle plate is to carry out assignment of traffic.Axial lower baffle plate and trapezoidal deflector centre position pair
Together, the most part liquid that guiding is entered by water inlet pipe enters heat exchange core body, small part liquid warp through the relatively low side of trapezium structure
Space between axial lower baffle plate and axial overhead gage and front supports enters the region between front supports and heat exchanger, to burning
Room and housing play cooling effect, and the aperture of baffle center of this fluid through being set on upper shell flows into heat exchange core body water outlet sky
Between.
Function aspects, coolant is entered after heat exchange core body according to the position of water fender progress assignment of traffic, one by water inlet
Level heat exchange pipe accounts for whole water-carrying capacity 42%, and secondary heat exchange flat tube accounts for flow 30%, and three-level flat heat exchange pipe accounts for flow 20%, one-level
The pipe that exchanges heat mainly carries out pressure heat exchange with high-temperature fuel gas, reduces high-temperature fuel gas temperature, it is ensured that two, three-level flat heat exchange pipe uses
Life-span, two, three-level flat heat exchange pipe heat exchange fin is mounted with due to inside, heat exchange area is greatly improved, it is ensured that complete machine heat-exchange performance
Energy.To realize this assignment of traffic, corresponding deflector and baffle plate are provided with upper and lower casing.Wherein, axial lower baffle plate and axle
Be fixed on to side shield on lower house, height of baffle plate with front supports change in shape and with front supports lateral surface interval 2mm, enter
Enter in the fluid of heat-exchanger rig about 8% and enter the space between upper shell and front supports through this gap, and through frame before upper shell
Gap between baffle plate and heat exchange core body flows into core body upper space, and then flows out heat-exchanger rig by delivery port, this segment fluid flow master
It is used to cool down front supports, improves heat-exchanger rig reliability.Set on the lower house that heat exchange core body one-level exchanges heat pipe bottom
Deflector after lower house front flow guiding plate and lower house is put, front flow guiding plate is located between first row heat exchanger tube and second row heat exchanger tube,
Flow backwards plate afterwards to be located on second row heat exchanger tube median plane, the trapezoidal structure of two deflectors, along exhaust gas flow direction, by center
Start height on the left of deflector and be more than right side.The purpose of trapezium structure deflector is set to be to intercept segment fluid flow in heat exchange circle
Bottom of the tube is to improve one-level heat exchange pipe flow, and a part of fluid of letting pass ensures flat heat exchange pipe flow.Wherein, water conservancy diversion before lower house
Plate ensures the flow of second row heat exchanger tube and the 3rd row's heat exchanger tube in one-level heat exchange pipe with rear deflector collective effect, meanwhile,
Through numerical simulation calculation and verification experimental verification, rear deflector is positioned on second row heat exchanger tube central plane and both may insure required stream
Amount, can also balance the thermic load of each row's heat exchanger tube.
Preferably, the upper shell lower casing constitutes a part for exhaust steam passage tube wall.
1. a kind of heat-exchange device of the present invention, the high-temp waste gas produced that burns flows through heat exchange dress by gas wing passage
Put, the liquid transferred heat to by gas wing passage wall and heat exchange core body fin in water wing passage, realize and liquid is carried out
Heating, the thin wall-type heat exchange structure of use can effectively reduce heat exchanged thermoresistance, reduction heat exchange core body volume and weight, with resistance to height
The characteristics of temperature, compact conformation, heat exchange efficiency and high power density.
2. a kind of heat-exchange device of the present invention, heat exchange core body front end uses the tubular heat exchange structure of thin-wall circular, pipe
Material selection high temperature resistant stainless steel, can improve the high temperature strength of heat exchange core body, effectively reduce the volume of combustion heat-exchange device.
3. a kind of heat-exchange device of the present invention, heat exchange core body rear end uses multiple rows of thin-walled flat pipe type heat exchange structure,
Straight tooth-shaped fin is provided between flat tube, gas wing passage heat exchange area is added, improves the heat exchange efficiency of heat-exchange device.Flat tube
Inside can effectively reduce the film boiling phenomenon of water side, add water side convection heat transfer intensity, reduce provided with the turbulent piece of zigzag
The thermic load of heat exchange core body, improves heat exchange efficiency.
4. a kind of heat-exchange device of the present invention, heat exchanger upper and lower casing is provided with baffle plate and deflector, it is used for
Water side liquid is guided to be flowed by design method, the liquid into water inlet pipe is in lower house bottom surface and the barrier effect of side board
Under, it is most of to enter in the water wing passage around heat exchange core body, and under the two deflectors shunting of the breach of lower house bottom surface half, by
Heat exchange core body bottom flows through inside pipe and flat tube and enters outlet pipe from bottom to top, is reduced while heat transfer temperature difference is improved
The thermic load of heat exchange core body.Meanwhile, front supports are served into the liquid between front supports and heat exchanger housing cold
But act on, the liquid improved around its reliability, rear supports is exchanged heat with burning and gas-exhausting, improves heat utilization ratio.
5. a kind of heat-exchange device of the present invention, heat exchanger upper and lower casing uses covered structure in joint, can
To play a part of reinforcement structure stability, upper shell square structure intermediate region is provided with outside square groove, while side
Through hole is provided with the baffle plate that the forward and backward two ends of shape structure are set, is easy to heat-exchange device internal gas to assemble and arrange to water outlet pipe part
Go out, it is to avoid the heat-exchange device thermic load increase caused by pneumatosis.
6. a kind of heat-exchange device of the present invention, front end sets combuster mounting structure, rear end is provided with smoke evacuation
Device mounting flange structure, improves the integrated level of combustion heat-exchange device, is easy to maintenance, maintenance of the burning with heat-exchange device.
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, can make various changes or modifications, therefore protection scope of the present invention should
It is defined when by claim limited range.
Claims (8)
1. a kind of burner exhaust heat utilizes heat-exchanger rig, including heat exchange core body, the heat exchange core body is arranged in waste gas flue, described
Heat exchange core body includes pipe, and the pipe is arranged perpendicular to exhaust gas flow direction, and interval setting is multiple in the pipe disperses to change
Heat structure, along the flow direction of circle tube fluid, sets multiple scattered heat exchange structures, from the entrance of pipe to pipe in pipe
Outlet, the distance between adjacent scattered heat exchange structure is shorter and shorter.
2. heat-exchanger rig as claimed in claim 1, from the entrance of pipe to the outlet of pipe, between adjacent scattered heat exchange structure
The shorter and shorter amplitude of distance be continuously increased.
3. heat-exchanger rig as claimed in claim 1, the scattered heat exchange structure includes core body and shell, the core body is arranged on
In shell, the shell is connected with heat exchange inside pipe wall, and the core body is included by a number of grid sheet permutation and combination
Into connection forms lattice and deletes hole between grid sheet.
4. heat-exchanger rig as claimed in claim 3, the core body of the separation heat exchange structure is welded by grid sheet.
5. set intercommunicating pore on heat-exchanger rig as claimed in claim 3, the grid sheet, by intercommunicating pore realize grate opening it
Between connection.
6. heat-exchanger rig as claimed in claim 1, the heat-exchanger rig is included after heat exchange core body front supports and heat exchange core body
Supporter, the heat exchange core body, front supports and rear supports are arranged in waste gas flue, the front supports and rear core body branch
Support body is located at heat exchange core body two ends respectively, and the gas wing passage of heat-exchanger rig is collectively forming with heat exchange core body.
7. heat-exchanger rig as claimed in claim 3, it is characterised in that the distance between adjacent scattered heat exchange structure is L, is disperseed
The length of heat exchange structure is C, and a diameter of D of heat exchanger tube, the fluid flow area that lattice delete hole is A, and lattice delete the fluid circulation in hole
Zhou Changwei Z, meet following require：
L/C=a-b*LN (D/E)；
E=4A/Z；
Wherein LN is logarithmic function, and a, b is parameter, wherein 4.9<a<6.1,1.3<b<2.1；
The spacing for wherein disperseing heat exchange structure is with the distance between relative two ends of adjacent scattered heat exchange structure；
10<D<18mm；
8<C<15mm；
25<L<35mm。
8. heat-exchanger rig as claimed in claim 7, it is characterised in that it is square that lattice, which delete hole,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710328228.7A CN107270747B (en) | 2017-05-11 | 2017-05-11 | A kind of burner exhaust heat of heat exchange structure spacing variation utilizes heat-exchanger rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710328228.7A CN107270747B (en) | 2017-05-11 | 2017-05-11 | A kind of burner exhaust heat of heat exchange structure spacing variation utilizes heat-exchanger rig |
Publications (2)
| Publication Number | Publication Date |
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| CN107270747A true CN107270747A (en) | 2017-10-20 |
| CN107270747B CN107270747B (en) | 2019-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710328228.7A Expired - Fee Related CN107270747B (en) | 2017-05-11 | 2017-05-11 | A kind of burner exhaust heat of heat exchange structure spacing variation utilizes heat-exchanger rig |
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| CN108387126A (en) * | 2018-03-16 | 2018-08-10 | 青岛金玉大商贸有限公司 | A kind of heat pipe evaporator of condenser pipe distribution density variation |
| CN108444321A (en) * | 2018-03-16 | 2018-08-24 | 青岛金玉大商贸有限公司 | A kind of condenser pipe extends to the heat pipe evaporator of the variation of the length rule in water tank |
| CN108578850A (en) * | 2018-03-16 | 2018-09-28 | 青岛金玉大商贸有限公司 | A kind of heat pipe evaporator of condenser pipe diameter change |
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| US3749155A (en) * | 1970-07-16 | 1973-07-31 | Georges Claude Sa | Exchange process |
| JPS59109778A (en) * | 1982-12-16 | 1984-06-25 | Matsushita Electric Ind Co Ltd | Heat exchanger of condenser type |
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| CN108387126A (en) * | 2018-03-16 | 2018-08-10 | 青岛金玉大商贸有限公司 | A kind of heat pipe evaporator of condenser pipe distribution density variation |
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|---|---|
| CN107270747B (en) | 2019-03-15 |
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