CN107192283B - Round tube-flat tube combination burner exhaust heat utilizes heat-exchanger rig - Google Patents
Round tube-flat tube combination burner exhaust heat utilizes heat-exchanger rig Download PDFInfo
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- CN107192283B CN107192283B CN201710328258.8A CN201710328258A CN107192283B CN 107192283 B CN107192283 B CN 107192283B CN 201710328258 A CN201710328258 A CN 201710328258A CN 107192283 B CN107192283 B CN 107192283B
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- heat
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- core body
- round tube
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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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
-
- 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
-
- 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
-
- 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
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Geometry (AREA)
- Fluid Mechanics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention provides a kind of burner exhaust heats to utilize heat-exchanger rig, including heat exchange core body, the heat exchange core body is arranged in exhaust gas flue, the heat exchange core body includes round tube and flat tube, flow direction of the flow direction of the round tube and flat liquid in pipe all perpendicular to exhaust gas, along the flow direction of exhaust gas, it is sequentially distributed round tube and flat tube.The heat exchange core body of heat-exchanger rig of the present invention is round tube-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, it is different using different heat exchange structures according to recepting the caloric in different location, the film boiling phenomenon of water side is effectively reduced, the thermic load for reducing heat exchange core body, improves heat exchange efficiency.
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 technique
Nearly ten years, due to energy shortage, as energy conservation is further carried out.It is various novel, energy conservation advanced type of furnace day
Become perfect, and after using the high-quality thermal insulation materials such as refractory fibre stove radiation loss is decreased obviously.Using advanced
Burner enhances burning, reduces imperfect combustion amount, and air-fuel ratio also tends to be reasonable.It becomes estranged however, reducing exhaust gas heat loss
The technology of Mist heat recovering is still in progress unhappy.In order to further increase the thermal efficiency of kiln, achieve the purpose that energy-saving, returns
Receiving fume afterheat is also an important energy saving way.
Flue gas is the main path of general energy consumption equipment waste energy, such as boiler exhaust gas energy consumption about 15%, and its
Mainly energy consumption is all to pass through flue gas emission for forming machine, dryer and kiln of his equipment such as dyeing etc..Fume afterheat
The heat that flue gas carries mainly is converted into utilizable heat by certain heat exchange mode by recycling.
Flue gas waste heat recovery approach generallys use two kinds of methods: one is pre- heated work pieces；Two kinds are that preheated air is helped
Combustion.Smoke pre-heating workpiece need to occupy biggish volume and carry out heat exchange, suffer from the limitation of working space.Preheated air is combustion-supporting
Be a kind of preferable method, be generally disposed on heating furnace, can also overheavy firing, accelerate the heating rate of stove, improve stove
Thermal property.
China has a vast territory, and weather and terrain environment are complicated, and Engines Used In Special Vehicle transmission system faces rubs under extremely cold environment
The unfavorable factors 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 reliability of vehicle is reduced greatly.Warmer transmits heat as a kind of combustion heat-exchange device, by coolant liquid, can be extreme
The cooling system of vehicle, lubricating system, transmission system, dynamical system etc. are heated under environment, each system is made to reach best
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.Both meet technique in this way
Requirement, finally also can get significant synthesis energy saving effect.
Existing warmer generally faces heat flow density and the lower problem of heat exchange efficiency, solves these problems key and is to increase
Add heat exchange area, reduce flow resistance, improve the heat transferring medium temperature difference and convection transfer rate etc., in the case where same volume, passes
System heat exchange structure has been unable to satisfy real needs, is based on background above technology and experimental study, and the present invention proposes a kind of heat exchange dress
It sets.
Summary of the invention
It is an object of the invention to solve existing UTILIZATION OF VESIDUAL HEAT IN heat-exchanger rig heat exchange efficiency is low, weight is big, it is big to occupy volume,
The problem of high temperature resistance difference proposes a kind of compact-sized, high temperature resistant, the heat-exchanger rig that power density is big, heat exchange efficiency is high.
To achieve the goals above, 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 exhaust gas flue, institute
Stating heat exchange core body includes round tube and flat tube, flowing side of the flow direction of the round tube and flat liquid in pipe all perpendicular to exhaust gas
To being sequentially distributed round tube and flat tube along the flow direction of exhaust gas.
Preferably, the fluid flow area of single round tube is greater than single flat tube.
Preferably, the fluid flow area of single round tube is 2-3 times of single flat tube circulation area.
Preferably, round tube have it is multiple rows of, every row contain more round tubes, it is adjacent two rows round tubes be interspersed；The flat tube
It is point multiple rows of, it close to round tube, is arranged on rear side of heat exchange core body, every row contains multiple flat tubes, and adjacent two rows of flat pipes forward and backward one is a pair of
It answers；The extending direction of flat tube is parallel to the flow direction of exhaust gas.
Preferably, fin is arranged inside flat tube, flow channel for liquids in flat tube is divided into multiple small flow channels, if entering apart from exhaust gas
The distance of mouth is S, then the hydraulic diameter of flat tube small flow channels is d, if d=F (S), then F ' (S) < 0, F ' (S) is once leading for F (S)
Number.
Preferably, F " (S) > 0, F " (S) are the second derivatives of F (S).
Preferably, the heat-exchanger rig includes heat exchange core body front supports and heat exchange core body rear supports, the heat exchange
Core, front supports and rear supports are arranged in exhaust gas flue, and the front supports and rear core support body are located at and change
The gas side channel of heat-exchanger rig is collectively formed with heat exchange core body for hot core both ends.
Preferably, the multiple dispersion heat exchange structures of subsection setup in the round tube, the dispersion heat exchange structure includes core
And shell, in the shell, the shell is connected and fixed with heat transfer tube wall, and the core includes by several numbers for the core setting
The grid sheet of amount is arranged in a combination, and connection forms lattice and deletes hole between grid sheet.
Preferably, the distance between adjacent dispersion heat exchange structure is L, the length for dispersing heat exchange structure is C, heat exchanger tube
Diameter is D, and 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 are parameters, wherein 4.9 < a < 6.1,1.3 <b < 2.1；
The spacing for wherein dispersing heat exchange structure is the both ends the distance between opposite with adjacent dispersion heat exchange structure；
10<D<18mm；
8<C<15mm；
25<L<35mm。
It is square preferably, lattice delete hole.
Preferably, the UTILIZATION OF VESIDUAL HEAT IN heat-exchanger rig is arranged in the exhaust gas flue of burner, preferably warmer
Flue.
Compared with prior art, of the invention to have the advantage that
1) heat-exchanger rig of the present invention, the heat exchange core body are round tube-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
Set according to recept the caloric it is different using different heat exchange structures, the film boiling phenomenon of water side is effectively reduced, reduces heat exchange core body
Thermic load, improve heat exchange efficiency.
2) heat-exchanger rig of the present invention forms the import header and outlet header of heat-exchanger rig using flue tube wall,
It avoids that import header and outlet header is separately provided, few, reduction heat exchange core body volume and weight so that heat-exchanger rig takes up space,
It is compact-sized.
3) heat-exchanger rig of the present invention, heat exchange core body use tubular heat exchanger tube, and the heat exchanger tube diameter is along cigarette
Flow of air direction gradually becomes smaller, and can effectively reduce the film boiling phenomenon of water side, increases water side convection heat transfer intensity, reduces
The thermic load of heat exchange core body, improves heat exchange efficiency.
4) heat-exchanger rig of the present invention, the spacing of the dispersion heat exchange structure in round tube with apart from round tube entrance away from
Reduce from continuous, can effectively reduce the film boiling phenomenon of water side, increase water side convection heat transfer intensity, reduce heat exchange core
The thermic load of body, improves heat exchange efficiency.
5) heat-exchanger rig of the present invention, the length of the dispersion heat exchange structure in round tube with apart from round tube entrance away from
Reduce from continuous, can effectively reduce the film boiling phenomenon of water side, increase water side convection heat transfer intensity, reduce heat exchange core
The thermic load of body, improves heat exchange efficiency.
6) lattice are arranged in heat exchanger tube and delete formula dispersion heat exchange structure, exchange in heat pipe for heat-exchanger rig of the present invention
Steam water interface is separated, and the film boiling phenomenon of water side is effectively reduced, and is increased water side convection heat transfer intensity, is reduced and change
The thermic load of hot core, improves heat exchange efficiency.
7) design is optimized by a large amount of numerical simulation and its experiment to the structure of dispersion heat exchange structure in the present invention
Optimal dispersion heat exchange structure optimized dimensions have been obtained, heat exchange efficiency is further increased.
8) heat-exchanger rig of the present invention, heat exchanger upper and lower casing is equipped with baffle and deflector, for guiding water
Side liquid by numerical simulation of optimum conclusion flow, into water inlet pipe liquid in lower case 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 shunting of two deflectors of half notch of lower case bottom surface, by
Heat exchange core body bottom flows through inside round tube and flat tube from bottom to top and enters outlet pipe, reduces while improving heat transfer temperature difference
The thermic load of heat exchange core body.Meanwhile front supports are played into the liquid between front supports and heat exchanger shell cold
But it acts on, improves its reliability, the liquid around rear supports exchanges heat with burning and gas-exhausting, improves heat utilization ratio.
9) heat-exchanger rig of the present invention, heat exchanger upper and lower casing use overlay structure at docking, can play
The effect of reinforcement structure stability, upper housing square structure intermediate region are provided with outside square groove, while square structure
Front and rear ends setting baffle on be provided with through-hole, convenient for heat-exchanger rig internal gas to water outlet pipe part assemble and be discharged, avoid because
Pneumatosis causes heat-exchanger rig thermic load to increase.
10) combuster mounting structure is arranged in a kind of heat-exchanger rig of the present invention, front end, and rear end is provided with smoke evacuation dress
Mounting flange structure is set, the integrated level of combustion heat-exchange device is improved, convenient for maintenance, the maintenance with heat-exchanger rig of burning.
Detailed description of the invention
Fig. 1 is a kind of main view of embodiment of heat-exchanger rig of the invention；
Fig. 2 is a kind of right view of embodiment of heat-exchanger rig of the invention；
Fig. 3 is heat exchange core body water side structure figure of the invention；
Fig. 4 is heat exchange core body gas side structure chart of the invention；
Fig. 5 is heat exchanger upper housing structure chart of the invention；
Fig. 6 is heat exchanger lower case structure chart of the invention；
Fig. 7 is present invention dispersion heat exchange structure cross-sectional structure schematic diagram；
Fig. 8 is present invention dispersion heat exchange structure arrangement schematic diagram in heat exchanger tube；
Fig. 9 is another schematic diagram that present invention dispersion heat exchange structure is arranged in heat exchanger tube.
Figure 10 is that present invention dispersion heat exchange structure arranges cross-sectional view in heat exchanger tube.
In figure: 1. heat exchange core bodies；2. front supports；3. rear supports；4. heat exchanger upper housing；5. heat exchanger lower casing
Body；6. frame baffle before upper housing；7. frame baffle after upper housing；8. lower case side baffle；9. frame baffle after lower case；
10. front flow guiding plate；Deflector after 11.；12. combustion chamber mounting cylinder；13. mounting flange；14. outlet pipe；Gas vent before 15.；16.
Gas vent afterwards；17. round tube；18. flat tube；19. water side cover plate；20. gas side cover board；21. straight tooth-shaped turbulent flow piece；22. zigzag wing
Piece；23. upper housing overhead gage；24. upper housing side baffle；25. lower case side baffle；26. lower case overhead gage；27. lower case
Front flow guiding plate；28. deflector after lower case；29. axial lower baffle plate；30. axial side baffle；31. water inlet pipe；32, dispersion heat exchange
Structure, 33 dispersion 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 plate 40.
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
Herein, if without specified otherwise, it is related to formula, "/" indicates that division, "×", " * " indicate multiplication.
A kind of 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 exhaust gas flue 12, described
Heat exchange core body 1 includes upper cover plate 36, lower cover plate 40 and Duo Gen heat exchanger tube, and heat exchanger tube connection runs through upper cover plate 36 and lower cover plate 40,
The front supports 2 and rear supports 3 are located at 1 both ends of heat exchange core body, and the gas of heat-exchanger rig is collectively formed with heat exchange core body 1
Wing passage；The front supports 1 connect heat exchange core body upper cover plate 36,12 tube wall of lower cover plate 40 and flue, and the rear supports 2 connect
Connect 12 tube wall of heat exchange core body upper cover plate 36, lower cover plate 40 and flue, the front supports 2, rear supports 3, heat exchange core body cover board
36 and 12 tube wall of flue the liquid-inlet header 37 and outlet header 38 of heat-exchanger rig is collectively formed.
Heat-exchanger rig of the present invention, using tube wall as a portion of the import header of heat-exchanger rig and outlet header
Part is formed the import header and outlet header of heat-exchanger rig using flue tube wall, heat-exchanger rig is integrally all disposed within to exhaust gas cigarette
In road, avoid that import header and outlet header is separately provided so that heat-exchanger rig take up space it is few, reduce heat exchange core body volume with
Weight, it is compact-sized.
Preferably, the front supports 2 and rear supports 3 are tubular structure, 2 tube wall both ends of the front supports connection
Cover board 36,40 and flue tube wall, the tube wall both ends connecting cover plate 36,40 and flue tube wall of rear supports 3.
By so set, front supports 2 and rear supports 3 is made to be respectively formed the exhaust gas entrance of heat-exchanger rig exhaust gas side
And waste gas outlet, further such that compact-sized.
Preferably, the tube wall of the front supports 2, rear supports 3 connects 12 tube wall of flue by intermediate member 39,
The intermediate member 39 is curved plate structure, as shown in Figure 1.
Preferably, the water inlet pipe 31 and outlet pipe 14 of the heat-exchanger rig are separately positioned on 12 tube wall of flue and difference
It is connected to import header and outlet header.
Preferably, import header 38 is located at the lower part of flue, collection 37 pipe in outlet is located at the top of flue.
Preferably, the heat exchanger tube includes round tube 17, the round tube 17 is arranged perpendicular to exhaust gas flow direction, along useless
The diameter in flow of air direction, round tube 17 is smaller and smaller.If the distance apart from exhaust gas entrance is S, then the internal diameter of round tube is D, if D=
F (S), then F ' (S) < 0, F ' (S) is the first order derivative of F (S).
Because the waste air temperature at inlet of UTILIZATION OF VESIDUAL HEAT IN heat-exchanger rig is very high, so that the liquid in heat exchanger tube forms carbonated drink
Mixture, and along the flow direction of flue gas, the vapour phase ratio formed in steam water interface is lower and lower, and liquid phase ratio is more next
It is higher.Because the vapour phase ratio of front end is high, the space occupied is necessarily big, therefore passes through the variation of round tube diameter, so that changing
The round tube 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 avoids front heat exchange pipe pressure excessive, so that integrally all heat exchange overpressures are uniform for heat exchange core body, keeps away
Exempt from excessive with pressure, extends the service life of heat-exchanger rig.
Preferably, then F " (S) > 0, F " (S) are the second derivatives of F (S).I.e. along exhaust gas flow direction, round tube it is straight
The smaller and smaller amplitude of diameter is continuously increased.
It is found through experiments that, it, can be with the pressure in further satisfaction different location round tube point by the setting of upper F " (S) > 0
Cloth is further ensured that heat exchange overpressure is evenly distributed.
Preferably, as shown in figure 3, along flue gas flow direction, round tube 17 is set as multiple rows of, and the round tube 17 is mistake
Array structure, the spacing between the center of circle of adjacent round tube 17 are 1.1-1.3 times of 17 outer diameter of round tube.17 outer diameter of round tube is adjacent two
The average value for the pipe outside diameter that exchanges heat.
Preferably, the diameter of latter row's round tube 17 is the 0.93- of adjacent front-seat round tube diameter along exhaust gas flow direction
0.98 times.
Above-mentioned proportionate relationship is optimal proportionate relationship through a large number of experiments.Pass through above-mentioned caliber and spacing
The setting of size enables to pressure distribution to be optimal.
Preferably, front supports 2 form the intake channel of gas side, rear supports 3 form the exit passageway of gas side.
Preferably, the heat exchanger tube includes round tube 17, the multiple separation heat exchange structures 32 of subsection setup in the round tube 17,
The separation heat exchange structure 32 includes core and shell 33, and the core is arranged in shell 33, the shell 33 and round tube 17
Inner wall is connected and fixed, and the core includes by a number of grid sheet 35, and connection forms lattice and deletes hole 34 between grid sheet 35.
Because exhaust gas temperature is very high, so that the process in round tube will form stream-liquid two-phase flow, the present invention is arranged in round tube
Grid heat exchange dispersion heat exchange structure is separated the liquid and gas in two-phase fluid by dispersion heat exchange structure, by liquid phase
It is dispersed into small liquid group, by gas phase dispersion at minute bubbles, inhibits the reflux of liquid phase, promotes gas phase smooth outflow, play regime flow
Effect, have the effect of vibration and noise reducing.Meanwhile the present invention disperses heat exchange structure by setting grid, is equivalent in heat exchanger tube
Inner fin is inside increased, 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 dispersed, thus entire
The dispersion of gas-liquid interface and gas phase boundary and the contact area of cooling wall are realized on heat exchange tube section and enhances disturbance, greatly
Big reduces noise and vibration, enhances heat transfer.
Preferably, the core for separating heat exchange structure 32 is to be integrally formed.
Preferably, the core for separating heat exchange structure 32 is welded by grid sheet 35.
Preferably, preferably, intercommunicating pore is arranged on the grid sheet 35.It is realized between grate opening 34 by intercommunicating pore
Connection.
Pass through setting intercommunicating pore, it is ensured that it is interconnected between adjacent grate opening, it can be between homogeneous lattice gate hole
Pressure, so that the fluid of high pressure runner flows to low pressure, while it is gentle further to separate liquid phase while fluid flows
Phase is conducive to further stablize two-phase flow.
Preferably, setting is multiple in round tube 17 along the flow direction (i.e. the short transverse of Fig. 8) of fluid in round tube 17
Disperse heat exchange structure 32, from the entrance of round tube to the outlet of round tube, the distance between adjacent dispersion heat exchange structure is shorter and shorter.If
Distance apart from round tube entrance is H, and the distance between adjacent dispersion heat exchange structure is L, L=F1(H), i.e. L is with height H for change
The function of amount, L ' are the first order derivatives of L, meet following require:
L'<0；
Main cause is because the steam in round tube understands carrier's liquid, in uphill process, round tube in uphill process
It is continuous heated, cause the steam in biphase gas and liquid flow more and more, because the vapour phase in stream-liquid two-phase flow is more and more, round tube
Interior exchange capability of heat can increase with vapour phase and weaken relatively, and vibration and its noise also can constantly increase as vapour phase increases
Add.Therefore the distance between the adjacent dispersion heat exchange structure for needing to be arranged is shorter and shorter.
In addition, exporting to this section of upper header from round tube, because the space of this section becomes larger suddenly, the variation in space can be led
Cause quickly flowing upwards out and assemble for gas, thus spatial variations will lead to the vapour phase (vapour group) of aggregation enter from round tube position it is cold
Agglutination pipe, due to gas (vapour) liquid density contrast, air mass leaves adapter tube position and will move rapidly upward, and air mass original spatial position is by gas
Group pushes away the liquid of wall surface while will also spring back and hit wall surface rapidly, forms impingement phenomenon.Gas (vapour) liquid phase is more discontinuous, gas
Reuniting, collection is bigger, and water hammer energy is bigger.Impingement phenomenon will cause biggish noise vibration and mechanical shock, cause brokenly to equipment
It is bad.Therefore in order to avoid the generation of this phenomenon, the distance between adjacent dispersion heat exchange structure being arranged at this time is shorter and shorter, from
And constantly separate gas phase and liquid phase in fluid delivery process, to reduce vibration and noise to the full extent.
It is found through experiments that, by above-mentioned setting, can both reduce vibration and noise to the full extent, while can mention
High heat transfer effect.
Further preferably, from the entrance of round tube 17 to the outlet of round tube 17, the distance between adjacent dispersion heat exchange structure is more
It is continuously increased come shorter amplitude.That is S " is the second derivative of S, meets following require:
L">0；
It is found through experiments that, by being improved simultaneously so set, 10% or so vibration and noise can be further decreased
11% or so heat transfer effect.
Preferably, the length of each dispersion heat exchange structure 32 remains unchanged.
Preferably, dispersing heat exchange structure others parameter other than the distance between adjacent dispersion heat exchange structure 32
(such as length, caliber etc.) remains unchanged.
Preferably, along the short transverse of round tube 17, the multiple dispersion heat exchange structures 32 of setting in round tube 17, from round tube 17
Entrance to the outlet of round tube 17, the length for dispersing heat exchange structure 32 is increasingly longer.The length for dispersing heat exchange structure is C, C=
F2(X), C ' is the first order derivative of C, meets following require:
C'>0；
Further preferably, disperse the increasingly longer amplitude of the length of heat exchange structure to the outlet of round tube from the entrance of round tube
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 dispersion heat exchange structure of specific reason is identical.
Preferably, the distance between adjacent dispersion heat exchange structure remains unchanged.
Preferably, in addition to dispersion heat exchange structure length be outside one's consideration, dispersion heat exchange structure others parameter (such as it is adjacent between
Away from, caliber etc.) it remains unchanged.
Preferably, along the short transverse of round tube 17, the multiple dispersion heat exchange structures of setting in round tube 17, from round tube 17
For entrance to the outlet of round tube 17, the hydraulic diameter that difference disperses the grate opening 41 in heat exchange structure 32 is smaller and smaller.I.e. dispersion is changed
The grate opening hydraulic diameter of heat structure is Z, Z=F3(X), Z ' is the first order derivative of Z, meets following require:
Z'<0；
Preferably, dispersing the grate opening hydraulic diameter of heat exchange structure increasingly from the entrance of round tube to the outlet of round tube
Small amplitude is continuously increased.I.e.
Z " is the second derivative of Z, meets following require:
Z”>0。
The variation of the distance between for example adjacent dispersion heat exchange structure of specific reason is identical.
Preferably, the length of dispersion heat exchange structure and the distance of adjacent dispersion heat exchange structure remain unchanged.
Preferably, dispersing heat exchange structure others parameter (example other than the grate opening hydraulic diameter of dispersion heat exchange structure
The distance between such as length, adjacent dispersion heat exchange structure) it remains unchanged.
Further preferably, as shown in figure 3, groove is arranged inside the round tube 17, the shell of the dispersion heat exchange structure 32
33 are arranged in groove.
Preferably, the aligning inner of the inner wall of shell 33 and round tube 17.By alignment, so that on the surface of round tube inner wall face
Reach in the same plane, guarantees the smooth of surface.
Preferably, the thickness of shell 33 is less than the depth of groove, round tube inner wall face can be made to form groove in this way, from
And carry out augmentation of heat transfer.
Further preferably, as shown in figure 4, round tube 17 is welded for multi-segment structure, the junction setting point of multi-segment structure
Dissipate heat exchange structure 32.This mode makes being simple to manufacture for the round tube of setting dispersion heat exchange structure, and cost reduces.
It is learnt by analyzing and testing, the spacing dispersed between heat exchange structure cannot be excessive, leads to damping if excessive
The effect of noise reduction is bad, while can not be too small, causes resistance excessive if too small, and similarly, the outer diameter of grate opening can not mistake
The big perhaps too small 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 meet normal flow resistance (total pressure-bearing be 2.5Mpa hereinafter, single round tube on-way resistance be less than or equal to 5Pa/
M in the case where), so that being optimal of damping noise reduction, has arranged the optimal relationship of parameters.
Preferably, the distance between adjacent dispersion heat exchange structure is L, the length for dispersing heat exchange structure is C, heat exchanger tube
Diameter is D, and 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 are parameters, 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 dispersing heat exchange structure is the both ends the distance between opposite with adjacent dispersion heat exchange structure；Before i.e.
Face disperses the tail end of heat exchange structure and the distance between the front end for dispersing heat exchange structure below.Referring specifically to the mark of Fig. 9.
The diameter D of heat exchanger tube refers to the average value of internal diameter and outer diameter.
Preferably, round tube length S is between 140-200mm.Further preferably, between 160-180mm.
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 D/E, a constantly reduce, b constantly increases.
For parameters such as other parameters, such as tube wall, shell wall thickness according to normal standard setting.
Preferably, grate opening 34 extends in the whole length direction of dispersion heat exchange structure 32.That is the length of grate opening 34
Equal to the length of dispersion heat exchange structure 32.
By above-mentioned setting, can further augmentation of heat transfer, can be improved heat exchange efficiency.
Preferably, groove is arranged in the heat transfer tube wall, the shell of the dispersion heat exchange structure is arranged in groove, institute
State the inner wall of shell and the aligning inner of round tube.
Preferably, in addition to the grate opening that shell 33 is formed, remaining lattice is deleted hole and is square.
Preferably, the heat exchanger tube includes round tube 17 and flat tube 18, the round tube 17 is distributed in the front end of flat tube 18.
I.e. along the flow direction of exhaust gas, it is sequentially distributed round tube 17 and flat tube 18.
Main reason is that exhaust gas entrance side temperature is high, therefore liquid is easy boiling, so that stream-liquid two-phase flow is formed, because
The shape of round tube is circle, even if round tube circulation area is big in identical heat exchange area, 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 flat tube can be used, flat tube because shape be prolate shape,
Free air space is small, and liquid will not boil in rear end, therefore does not need big channel and can satisfy pressure requirements, and flat tube heat-transfer surface
Product is big, so that augmentation of heat transfer.Therefore pass through the distribution of flat tube and round tube, so that pressure distribution is opposite on the whole for heat-exchanger rig
Uniformly, it is excessive to avoid the occurrence of pressure, and exchange capability of heat relative increase.
Preferably, the fluid flow area of single round tube is greater than single flat tube.
Preferably, the fluid flow area of single round tube is 2-3 times of single flat tube circulation area.
Preferably, the round tube 17 is placed on front side of heat exchange core body, round tube 17 has multiple rows of, and every row contains multiple round tubes
17, adjacent two rows round tube 17 is interspersed.The flat tube 18 divide it is multiple rows of be arranged in heat exchange core body close to round tube heat exchange structure after
Side, every row contain multiple flat tubes 18, and the adjacent forward and backward one-to-one correspondence of two rows of flat pipes.
The extending direction of flat tube 18 is parallel to the flow direction of flue gas.
Preferably, the flow direction of liquid is all perpendicular to the flow direction of exhaust gas in the round tube 17 and flat tube 18.
Preferably, fin is arranged inside flat tube, flow channel for liquids in flat tube is divided into multiple small flow channels.Preferably, edge
The direction of exhaust gas flowing, the small flow channels hydraulic diameter in different flat tubes constantly become smaller.If the distance apart from exhaust gas entrance is S,
Then the hydraulic diameter of flat tube small flow channels is d, if d=F (S), then F ' (S) < 0, F ' (S) is the first order derivative of F (S).
Main cause is the flow direction along exhaust gas, and the pressure for needing to bear in flat tube is smaller and smaller, therefore can be incited somebody to action
Hydraulic diameter becomes smaller, and by the way that hydraulic radius becomes smaller, and can increase heat exchange area, improves exchange capability of heat.Therefore by upper
The setting for stating feature not only can satisfy pressure requirements, but also augmentation of heat transfer may be implemented.
Preferably, the amplitude that the hydraulic diameter of flat tube small flow channels is d is continuously increased along exhaust gas flow direction.That is F "
(S) > 0, F " (S) is the second derivative of F (S).
For F " (S) > 0, heat transfer effect can be significantly improved, and realize pressure balance.It is above-mentioned the result is that by big
The conclusion that the numerical simulation of amount and experiment obtain.
Preferably, preferably, the small flow channels hydraulic radius in same flat tube constantly becomes along the direction that liquid flows
It is small.If distance apart from exhaust gas entrance is S, then the hydraulic diameter of flat tube small flow channels is d, if d=F (S), then F ' (S) < 0, F '
It (S) is the first order derivative of F (S).
Preferably, the amplitude that the hydraulic diameter of same flat tube small flow channels is d is continuously increased along exhaust gas flow direction.
Then F " (S) > 0, F " (S) are the second derivatives of F (S).Concrete reason is such as front.
Preferably, the small flow channels cross section in flat tube is rectangle, having a size of 2x4mm.
Preferably, the small flow channels cross section between flat tube is triangle.
Preferably, front supports and rear supports are hollow side-circle transition structure, a side end face is rectangular, side
End face is circle, wherein the square end surface of front supports is connected and is fixed with one side end face of heat exchange core body round tube, sealed, round
It fixes, seal at end face and front combustion chamber mounting cylinder rear end face air outlet；The square end surface of rear supports and heat exchange core body are flat
One side end face of pipe is connected and fixes, seals, and fixes, seals at circular end face and aft flange device air outlet.
Preferably, the UTILIZATION OF VESIDUAL HEAT IN heat-exchanger rig is arranged in the exhaust gas flue of burner, preferably warmer
Flue.
Preferably, the exhaust 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 round tube is high temperature resistant stainless steel.
Preferably, exhaust outlet 15,16 is arranged in the heat-exchanger rig, the exhaust gas cigarette of upper collecting chamber is arranged in the exhaust outlet 15
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 with reference to the accompanying drawing.
Heat-exchanger rig involved in this preferred embodiment includes heat exchange core body 1, front supports 2, rear supports 3, heat friendship
Change before body upper housing 4 and the upper housing being arranged thereon frame baffle 7 after frame baffle 6, upper housing, heat exchanger lower case 5 and
Frame baffle 9 after the lower case side baffle 8 that is arranged thereon, lower case, front flow guiding plate 10, rear deflector 11, water inlet pipe 31, water outlet
Pipe 14, combustion chamber mounting cylinder 12, mounting flange 13 etc..
The heat exchange core body 1 is that thin wall-type round tube-pipe band combines heat exchange structure, is liquid flow inside round tube 17 and flat tube 18
Dynamic region, the region between round tube and round tube, flat tube and flat tube are gas flow area, are set between the adjacent flat tube of every rows of flat pipes
It is equipped with serrated fin 22, for increasing gas side channel for heat exchange area, flat tube is internally provided with straight tooth-shaped turbulent flow piece 21, for increasing
Add the disturbance to working fluid.The front supports 2, rear supports 3 square end surface respectively with 2 gas flow region of heat exchange core body
By being welded and fixed, the back end surface gas outlet of 2 circular end face of front supports and combustion chamber mounting cylinder 12 connects domain both ends of the surface
It connects, fix, 3 circular end face of rear supports is aligned and fixed with mounting flange minor diameter end face circular hole, the heat exchanger
Upper housing 4 is opposite with heat exchange core body water wing passage, is located on the upside of heat exchange core body 1 and supporter (2,3), the heat exchanger lower casing
Body 5 is located on the downside of heat exchange core body 2 and supporter (2,3), fixes at the free margins of two sides with heat exchanger upper housing 4.Upper and lower shell
It fixes, seal with 12 lateral surface of combustion chamber mounting cylinder, 13 smaller diameter end lateral surface of mounting flange respectively in body (4,5) front and rear end.
The preceding frame baffle 6 of the heat exchanger upper housing, rear frame baffle 7 are fastened transversely to the forward and backward of projected square part according to hull shape
Both ends, the heat exchanger lower case side baffle 25 are 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 9 is fastened transversely to the rear end of projected square part, water conservancy diversion before the stairstepping according to hull shape after permutoid lower case
Plate 10, rear deflector 11 are fixed on region, baffle and deflector corresponding to 5 bottom surface of heat exchanger lower case, 2 round tube of heat exchange core body
It is provided commonly for tissue liquid flow field.The water inlet pipe 31, outlet pipe 14 respectively with heat exchanger upper housing 4, heat exchanger lower casing
Body 5 connects, and is used as heat-exchanger rig with extraneous and connect bridge, with heat exchanger shell 4 and 5,1 liquid flow region of heat exchange core body and
Water side runner is collectively formed in core support body 2 and 3.The combustion chamber mounting cylinder 12, front supports 2, the flowing of 1 gas of heat exchange core body
Region, rear supports 3, mounting flange 13 collectively constitute gas side runner.The heat-exchanger rig is while realizing fluid interchange, tool
Have the characteristics that high temperature resistant, compact-sized, heat exchange efficiency and power density are high.
Specifically, seeing Fig. 3 and Fig. 4, heat exchange core body includes the forward and backward staggered high temperature resistant stainless steel round tube 17,2 of 3 rows
Arrange 20,42 serrated fins 22,40 of gas side cover board of water side cover plate 19,2 of stainless steel flat tube 18,2 of forward and backward alignment
A straight tooth-shaped turbulent flow piece 21, wherein the first row in round tube heat exchange structure and third row's round tube quantity are 9, second row round tube quantity
It is 8, round tube wall thickness is 1mm, and every rows of flat pipes quantity is 21 in flat tube heat exchange structure, 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 on 18 medial surface of flat tube and lateral surface using soldering processes.Water
It is provided on side cover plate 19 and matches with round tube 17 and the consistent circular hole of 18 quantity of flat tube and long hole, aperture and round tube and flat tube size
It closes, the side edge thereof of water side cover plate 19 and gas side cover board 20 is provided with 90 ° of flangings, convenient for fixing.Each component of heat exchange core body 1 passes through
Soldering processes are fixed and seal, and have good intensity and craftsmanship feature, and the volume of the heat exchange core body 1 after welding is
160 × 180 × 168 (mm), heat exchange area 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 rectangular,
One side end face is circle, wherein the square end surface of front supports 2 is connected and is welded and fixed with 1 front end face of heat exchange core body, sealed,
Circular end face is welded and fixed after being inserted in 12 small diameter cylinder of combustion chamber mounting cylinder, seals；The square end surface and heat exchange of rear supports
Core back-end face is docked and is welded and fixed, seals, and circular end face is welded and fixed in 13 front end face air inlet of mounting flange, is close
Envelope, it is preferred that back and front supporting body thickness is 1.5mm.
Specifically, the front support after the hull shape of the heat exchanger upper housing 4, heat exchanger lower case 5 and fixation
Body 2, heat exchange core body 1, rear supports 3 are similar, and front is circle, and-square transition structure, centre are square structure, the rear portion side of being-justified
Structure is crossed, upper housing 4 can surround core support body (2,3) and heat exchange core body 1 after docking with 5 two sides free margins of lower case
Wherein, and after fixing, seal with combustion chamber mounting cylinder lateral surface, mounting flange miner diameter end lateral surface heat-exchanger rig is collectively formed
Gas side channel.
It is covering at heat exchanger upper housing 4, the 5 two sides free margins docking of heat exchanger lower case specifically, seeing Fig. 2
Fixed structure, i.e. a side plane of upper housing at the docking near extend to the outside and have downward extension, expand as preferred
It is identical as thickness of shell to open up distance, another side plane of lower case has downward extension, and two extensions are fixed, when it is upper,
Lower case forms the structure mutually covered when docking at butt joint edge, and convenient for being welded and fixed, while it is steady to play reinforcement structure
Qualitatively effect.
Specifically, the circle of heat exchanger upper housing 4-square transition structure bottom surface is closed on to be equipped at front end face and is vented attached seat, it is convenient for
Exclude the air in front end water side runner.4 square structure intermediate region of heat exchanger upper housing is provided with outside square groove,
Gathering and be discharged convenient for heat-exchanger rig internal gas.4 square groove central area of heat exchanger upper housing is provided with circle and goes out
Water hole and sensor attached seat mounting hole are provided with round inlet opening in circle-side's transition structure of lower case right end face front end, into
Water hole is identical as water outlet bore dia, for installing water pipe, meanwhile, it is equipped with the attached seat mounting hole of sensor into and out of water hole side, for pacifying
The attached seat of sensor is filled, convenient for acquisition heat-exchanger rig water-in and water-out temperature.The outlet pipe 14 being mounted on heat exchanger upper housing 4 is set
It is equipped with the attached seat of exhaust, air is discharged convenient for heat-exchanger rig.
Specifically, seeing Fig. 5, heat exchanger upper housing 4 is provided with frame baffle 6 and upper housing before the identical upper housing of structure
Frame baffle 7 afterwards is made of 1 upper housing overhead gage 23 and 2 upper housing side baffle 24,23 upper middle zone of overhead gage respectively
Domain is provided with the semi-circular hole through baffle, and heat-exchanger rig is discharged by this hole convenient for the gas in 23 front space of overhead gage.Before
The overhead gage 23 of frame baffle 6 is placed horizontally in where 4 square structure front end of heat exchanger upper housing, 1 front end face of heat exchange core body
Plane, the length is the distances between upper housing two sides, highly with upper housing between 1 upper cover plate of heat exchange core body at a distance from it is identical,
It is fixed on 4 medial surface of heat exchanger upper housing；The side baffle 24 of preceding frame baffle 6 be located at preceding 6 overhead gage of frame baffle, 23 rear portion,
At left and right sides of heat exchange core body, height is consistent with place square structure side, and width and 4 side of upper housing are ipsilateral to heat exchange core body
The distance in face is identical, is fixed on 23 front end face of overhead gage of 4 medial surface of heat exchanger upper housing and preceding frame baffle 6.Equally
, 23 front end face of overhead gage of rear frame baffle 7 is located at plane where 1 rear end face of heat exchange core body, the side baffle of rear frame baffle 7
24 front end faces are located at plane where 23 rear end face of overhead gage of rear frame baffle 7.
Specifically, seeing Fig. 6, heat exchanger lower case 5 is provided with lower case side baffle 25, lower case overhead gage 26, lower casing
Deflector 28 (i.e. the deflector 12 of Fig. 1) after body front flow guiding plate 27 (i.e. the deflector 11 of Fig. 1), lower case, axial lower baffle plate 29,
Axial side baffle 30.Heat exchanger lower case 5 with upper housing square structure front and back ends arranged on left and right sides close positions at be arranged
There is side baffle 25, structure feature is identical as upper housing side baffle 24, when upper and lower casing docking, two housings same position
The forward and backward overlapping of side baffle, i.e. upper housing baffle trailing flank are overlapped with lower case baffle leading flank.On the bottom surface of lower case rear end, after
Lower case overhead gage 26 is horizontally arranged with before side baffle 25,26 trailing flank of overhead gage is overlapped with side baffle front end face, under being fixed on
On the inside of housing bottom surface, without aperture among lower baffle plate.Axial lower baffle plate 29 is weldingly fixed on 5 front end of heat exchanger lower case circle-side
Changeover portion inside bottom surface intermediate region, axial side baffle 30 are fixedly welded at the intermediate altitude of lower case right side, water inlet position
In baffle lower part, axial lower baffle plate 29 and 30 length of axial side baffle are consistent with front supports axial length.Water conservancy diversion before lower case
Deflector 28 is fastened transversely on 5 bottom surface of heat exchanger lower case after plate 27, lower case, length and heat exchanger lower case bottom surface
Equivalent width, and it is the 1/2 of other side height that deflector, which is located at the height of heat-exchanger rig central axis longitudinal direction vertical plane right part,.?
On heat-exchanger rig axial direction, lower case front flow guiding plate 27 is placed on flat with plane where two rows of round tubes axle center before heat exchange core body 1
In capable and equidistant plane, deflector 28 is placed on 1 second row round tube axle center of heat exchange core body institute in the plane after lower case.
Preferably, the height of lower baffle plate 29 in the axial direction with 2 bottom surface of front supports between heat exchanger lower case 5 at a distance from
And change, it is full by fluid flow herein be consistent at a distance from guaranteeing lower baffle plate 29 between front supports in the axial direction
Sufficient design requirement.
Preferably, axial 30 height of side baffle is in the axial direction between 2 right side of front supports and heat exchanger lower case 5
Distance and change, to be consistent at a distance from guaranteeing axial side baffle 30 between front supports in the axial direction, by herein
Fluid flow meets design requirement.
The purpose that deflector and baffle is arranged is to carry out assignment of traffic.Axial lower baffle plate and trapezoidal deflector middle position pair
Together, the most part liquid that guidance is entered by water inlet pipe enters heat exchange core body, small part liquid warp through the lower side of trapezium structure
Gap 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 shell play cooling effect, and it is empty that the aperture of baffle center of this fluid through being arranged on upper housing flows into heat exchange core body water outlet
Between.
In terms of function, coolant liquid is entered after heat exchange core body by water inlet carries out assignment of traffic according to the position of water fender, and one
Grade heat exchange round tube accounts for whole water flows 42%, and secondary heat exchange flat tube accounts for flow 30%, and three-level flat heat exchange pipe accounts for flow 20%, level-one
Heat exchange round tube mainly carries out pressure heat exchange with high-temperature fuel gas, reduces high-temperature fuel gas temperature, guarantees that two, three-level flat heat exchange pipe uses
Service life, two, three-level flat heat exchange pipe be mounted with that heat exchange fin, heat exchange area are greatly improved due to inside, ensure that complete machine heat-exchange performance
Energy.To realize this assignment of traffic, corresponding deflector and baffle are provided on upper and lower casing.Wherein, axial lower baffle plate and axis
Be fixed in lower case to side baffle, height of baffle plate with front supports change in shape and with face interval 2mm on the outside of front supports, into
Enter in the fluid of heat-exchanger rig about 8% and enter the space between upper housing and front supports through this gap, and through frame before upper housing
Gap between baffle and heat exchange core body flows into core upper space, and then flows out heat-exchanger rig by water outlet, this segment fluid flow master
It is used to cool down front supports, improves heat-exchanger rig reliability.It is set in the lower case of heat exchange core body level-one heat exchange round tube bottom
Set deflector after lower case front flow guiding plate and lower case, front flow guiding plate between first row heat exchanger tube and second row heat exchanger tube,
It flows 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 is greater than right side.The purpose that trapezium structure deflector is arranged is to intercept segment fluid flow justifies in heat exchange
For bottom of the tube to improve level-one heat exchange round tube flow, a part of fluid of letting pass ensures flat heat exchange pipe flow.Wherein, water conservancy diversion before lower case
Plate and rear deflector collective effect guarantee the flow of second row heat exchanger tube and third row's heat exchanger tube in level-one heat exchange round tube, meanwhile,
Through numerical simulation calculation and verification experimental verification, rear deflector, which is placed on second row heat exchanger tube central plane, 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 of exhaust steam passage tube wall.
1. the high-temp waste gas of a kind of heat-exchange device of the present invention, generation of burning flows through heat exchange dress by gas side channel
It sets, the liquid in water wing passage is transferred heat to by gas side channel wall and heat exchange core body fin, realizes and liquid is carried out
Heating, the thin wall-type heat exchange structure of use can effectively reduce heat exchanged thermoresistance, reduce heat exchange core body volume and weight, have resistance to height
Warm, compact-sized, heat exchange efficiency and the high feature of 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, round tube
The high temperature strength of heat exchange core body can be improved in material selection high temperature resistant stainless steel, effectively reduces 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,
It is equipped with straight tooth-shaped fin between flat tube, increases gas side channel for heat exchange area, improves the heat exchange efficiency of heat-exchange device.Flat tube
Inside is equipped with zigzag turbulent flow piece, can effectively reduce the film boiling phenomenon of water side, increases water side convection heat transfer intensity, reduces
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 equipped with baffle and deflector, is used for
Guide water side liquid by design method flowing, into water inlet pipe liquid in lower case 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 shunting of two deflectors of half notch of lower case bottom surface, by
Heat exchange core body bottom flows through inside round tube and flat tube from bottom to top and enters outlet pipe, reduces while improving heat transfer temperature difference
The thermic load of heat exchange core body.Meanwhile front supports are played into the liquid between front supports and heat exchanger shell cold
But it acts on, improves its reliability, the liquid around rear supports exchanges 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 overlay structure at docking, can
To play the role of reinforcement structure stability, upper housing square structure intermediate region is provided with outside square groove, while side
It is provided with through-hole on the baffle of shape structure front and rear ends setting, assembles and arranges to water outlet pipe part convenient for heat-exchange device internal gas
Out, heat-exchange device thermic load increases caused by avoiding because of pneumatosis.
6. a kind of heat-exchange device of the present invention, combuster mounting structure is arranged in front end, and rear end is provided with smoke evacuation
Device mounting flange structure, improves the integrated level of combustion heat-exchange device, convenient for maintenance, the maintenance with heat-exchange device of burning.
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 (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 exhaust gas flue, described
Heat exchange core body includes round tube and flat tube, the flow direction of the round tube and flat liquid in pipe all perpendicular to the flow direction of exhaust gas,
Along the flow direction of exhaust gas, it is sequentially distributed round tube and flat tube；The heat-exchanger rig includes heat exchange core body front supports and heat exchange
Core rear supports, the heat exchange core body, front supports and rear supports are arranged in exhaust gas flue, and the front supports are with after
Core support body is located at heat exchange core body both ends, and the gas side channel of heat-exchanger rig is collectively formed with heat exchange core body；
The multiple dispersion heat exchange structures of subsection setup in the round tube, the dispersion heat exchange structure include core and shell, the core
Body is arranged in the shell, and the shell is connected and fixed with heat transfer tube wall, and the core includes being arranged by a number of grid sheet
Column are composed, and connection forms grate opening between grid sheet.
2. the fluid flow area of heat-exchanger rig as described in claim 1, single round tube is greater than single flat tube.
3. heat-exchanger rig as claimed in claim 2, the fluid flow area of single round tube is the 2- of single flat tube circulation area
3 times.
4. heat-exchanger rig as described in claim 1, round tube has multiple rows of, and every row contains more round tubes, and adjacent two rows round tubes interlock
Distribution；The flat tube point is multiple rows of, close to round tube, is arranged on rear side of heat exchange core body, every row contains multiple flat tubes, and adjacent two rows are flat
Manage forward and backward one-to-one correspondence；The extending direction of flat tube is parallel to the flow direction of exhaust gas.
5. heat-exchanger rig as described in claim 1, fin is arranged in flat tube inside, and flow channel for liquids in flat tube is divided into multiple small streams
Road, if distance apart from exhaust gas entrance is S, then the hydraulic diameter of flat tube small flow channels is d, if d=F (S), then F ' (S) < 0, F '
It (S) is the first order derivative of F (S).
6. heat-exchanger rig as claimed in claim 5, F " (S) > 0, F " (S) are the second derivatives of F (S).
7. heat-exchanger rig as described in claim 1, which is characterized in that the distance between adjacent dispersion heat exchange structure is L, dispersion
The length of heat exchange structure is C, and the diameter of heat exchanger tube is D, and the fluid flow area of grate opening is A, the fluid circulation of grate opening
Zhou Changwei Z meets following require:
L/C=a-b*LN (D/E)；
E=4A/Z；
Wherein LN is logarithmic function, and a, b are parameters, wherein 4.9 < a < 6.1,1.3 <b < 2.1；
The spacing for wherein dispersing heat exchange structure is the both ends the distance between opposite with adjacent dispersion heat exchange structure；
10<D<18mm；
8<C<15mm；
25<L<35mm。
8. heat-exchanger rig as claimed in claim 7, which is characterized in that grate opening is square.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242452.3A CN110017497B (en) | 2017-05-11 | 2017-05-11 | Design method for diameter of flat pipe of waste heat utilization heat exchange device |
| CN201710328258.8A CN107192283B (en) | 2017-05-11 | 2017-05-11 | Round tube-flat tube combination burner exhaust heat utilizes heat-exchanger rig |
| CN201910242211.9A CN110017496B (en) | 2017-05-11 | 2017-05-11 | Waste heat utilization heat exchange device with scattered heat exchange structure grid hole change |
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| CN201710328258.8A CN107192283B (en) | 2017-05-11 | 2017-05-11 | Round tube-flat tube combination burner exhaust heat utilizes heat-exchanger rig |
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| CN201910242452.3A Division CN110017497B (en) | 2017-05-11 | 2017-05-11 | Design method for diameter of flat pipe of waste heat utilization heat exchange device |
| CN201910242211.9A Division CN110017496B (en) | 2017-05-11 | 2017-05-11 | Waste heat utilization heat exchange device with scattered heat exchange structure grid hole change |
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| CN107192283A CN107192283A (en) | 2017-09-22 |
| CN107192283B true CN107192283B (en) | 2019-08-30 |
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| CN201710328258.8A Expired - Fee Related CN107192283B (en) | 2017-05-11 | 2017-05-11 | Round tube-flat tube combination burner exhaust heat utilizes heat-exchanger rig |
| CN201910242211.9A Expired - Fee Related CN110017496B (en) | 2017-05-11 | 2017-05-11 | Waste heat utilization heat exchange device with scattered heat exchange structure grid hole change |
| CN201910242452.3A Expired - Fee Related CN110017497B (en) | 2017-05-11 | 2017-05-11 | Design method for diameter of flat pipe of waste heat utilization heat exchange device |
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| CN201910242211.9A Expired - Fee Related CN110017496B (en) | 2017-05-11 | 2017-05-11 | Waste heat utilization heat exchange device with scattered heat exchange structure grid hole change |
| CN201910242452.3A Expired - Fee Related CN110017497B (en) | 2017-05-11 | 2017-05-11 | Design method for diameter of flat pipe of waste heat utilization heat exchange device |
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| CN107906747B (en) * | 2017-12-14 | 2023-10-13 | 浙江广涛卫厨有限公司 | heat exchanger |
| CN110895112A (en) * | 2019-12-23 | 2020-03-20 | 浙江银轮机械股份有限公司 | Engine tail gas evaporation superheater |
| CN114322301B (en) * | 2021-04-23 | 2023-04-18 | 王耀 | Environment-friendly water-cooled combustor |
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- 2017-05-11 CN CN201910242211.9A patent/CN110017496B/en not_active Expired - Fee Related
- 2017-05-11 CN CN201910242452.3A patent/CN110017497B/en not_active Expired - Fee Related
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| CN206989769U (en) * | 2017-05-11 | 2018-02-09 | 中国北方车辆研究所 | The burner exhaust heat of pipe flat tube combination utilizes heat-exchanger rig |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110017497B (en) | 2020-07-24 |
| CN107192283A (en) | 2017-09-22 |
| CN110017497A (en) | 2019-07-16 |
| CN110017496B (en) | 2020-05-12 |
| CN110017496A (en) | 2019-07-16 |
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