CN106066133A - Single-tube fin type heat exchanger and assembling thereof - Google Patents
Single-tube fin type heat exchanger and assembling thereof Download PDFInfo
- Publication number
- CN106066133A CN106066133A CN201610460010.2A CN201610460010A CN106066133A CN 106066133 A CN106066133 A CN 106066133A CN 201610460010 A CN201610460010 A CN 201610460010A CN 106066133 A CN106066133 A CN 106066133A
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- CN
- China
- Prior art keywords
- flue gas
- fin
- heat exchanger
- fluid flow
- flow tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
- F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
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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
Abstract
Single-tube fin type heat exchanger and assembling thereof.Heat exchanger assemblies includes: at least middle part has the fluid flow tube of oval cross section, a length of 2a of the major axis of wherein said ellipse, a length of 2b of short axle；And shape is bonded on single fluid flow tube outer surface in consistent manner and along the axial multipair flue gas fin spaced apart from each other of described single fluid flow tube, every pair of flue gas fin includes being mutually aligned arrangement and being collectively forming the first flue gas fin and the second flue gas fin of rectangle outline.The shape of the first flue gas fin and the second flue gas fin is essentially identical, between first flue gas fin and the second flue gas fin of every pair of flue gas fin, there is the gap, outside along described transverse direction, the a length of A on the long limit of described rectangle, the a length of B of minor face, wherein the ratio of A and 2a is between 1.3 to 2.3；And the ratio of B and 2b is between 2.0 to 4.0.
Description
Technical field
This patent disclosure relates generally to a kind of heat exchanger.
Background technology
The oval base tube H type fin proposed in flue gas heat-exchange unit patent CN101762199B obtained before applicant passes
Heat pipe has that Soot Performance wear-resistant, anti-is good, flow resistance is little, low in energy consumption, compact conformation, unit space can accommodate more being subject to
The advantages such as hot side.Obtain application in had under its command power plant such as Huaneng Group group, Shen Neng group, CITIC Groups in recent years, and obtain preferably
Effect.
But, harsh because of environmental requirement in recent years, minimum discharge technology and low temp. electric cleaner unit technology obtain to be greatly developed
And popularization, cigarette cooler is arranged at electric cleaner upstream, and dust concentration is up to 10000～60000mg/Nm3, flue dust abrasion adds
Play, dust stratification is serious all the more, and flue gas cool-down amplitude is up to 50 DEG C, therefore to the flow resistance of heat-transfer pipe, the power consumption that flows, heat transfer energy
Power etc. all propose requirements at the higher level.
Summary of the invention
It is an object of the invention to provide the heat exchanger of a kind of improvement, it can overcome certain or some of prior art to lack
Fall into.
According to the first aspect of the invention, it is provided that a kind of utilize fume afterheat to add the heat exchanger of hot liquid such as water
Assembly, including:
At least middle part has the fluid flow tube of oval cross section, a length of 2a of the major axis of wherein said ellipse, the length of short axle
For 2b；And
Shape is bonded on single fluid flow tube outer surface and axial spaced apart from each other many along described single fluid flow tube in consistent manner
To flue gas fin, the every pair of flue gas fin include being mutually aligned arrangement and the first flue gas fin being collectively forming rectangle outline and
Second flue gas fin, wherein the shape of the first flue gas fin and the second flue gas fin is essentially identical, the first of every pair of flue gas fin
There is between flue gas fin and the second flue gas fin the gap, outside along described transverse direction, the length on the long limit of described rectangle
Degree is A, a length of B of minor face,
Wherein the ratio of A and 2a is between 1.3 to 2.3；And
The ratio of B and 2b is between 2.0 to 4.0.
It is discussed further as rear, uses the combination property of the heat exchanger assemblies of this parameter area significantly to be carried
High.Wherein: the ratio of A and 2a is preferably between 1.5 to 2.2, the most preferably between 1.6 to 2.0, more preferably 1.8
Left and right；The ratio of B and 2b is preferably between 2.2 to 3.0, and the most preferably between 2.3 to 2.8, more preferably 2.5 is left
Right.
A specific embodiment according to the present invention, the ratio of a and b can between 1.9 to 2.9, preferably 2.1 to
Between 2.8, the most preferably between 2.3 to 2.7, more preferably about 2.5.
According to another specific embodiment of the present invention, the equivalent diameter of described ellipse can 32mm to 51mm it
Between, preferably 32mm or 38mm or 51mm.Here equivalent circular refers to: one mother metal pipe of direct cold rolling and form Target ellipse
Guan, wherein for Target ellipse pipe, the diameter of mother metal pipe is exactly its equivalent diameter.A diameter of 32mm, 38mm and 51mm
Mother metal pipe be commercially available specification pipe, acquisition is convenient.
According to another specific embodiment of the present invention, gap, outside thickness W can be preferably between 6mm to 12mm
About 8mm.
According to another specific embodiment of the present invention, the thickness of flue gas fin can be between 1.5mm to 4mm.
According to another specific embodiment of the present invention, the pipe thickness of fluid flow tube can be between 3mm to 5mm.
According to another specific embodiment of the present invention, the axial spacing of phase adjacency pair flue gas fin can be at 10mm to 30mm
Between.
According to another specific embodiment of the present invention, the material of fluid flow tube and/or flue gas fin can be selected from carbon steel,
ND steel and rustless steel, and flue gas fin and the most independent molding of fluid flow tube by being welded and fused.
According to another specific embodiment of the present invention, the two end portions of fluid flow tube can have circular cross-section.This two
The fluid flow tube of end circular cross-section design is convenient uses conventional criteria joint to be attached in follow-up assembling process.
According to the second aspect of the invention, it is provided that a kind of heat exchanger in being arranged in flue, including by least
At least one side wall of one above-mentioned heat exchanger assemblies arrangement, every face wall is each perpendicular to flow of flue gas direction in flue, often
Face wall includes that the heat exchanger assemblies of flue sidewall is all stretched out at least one horizontally disposed and fluid flow tube two ends, wherein every
The fluid flow tube setting parallel with one another of the heat exchanger assemblies in wall also connects corresponding one by being positioned at the union elbow outside flue
Hold and be connected in series with the fluid flow tube of the same level height along an adjacent face wall in downstream, flow of flue gas direction.
According to the third aspect of the invention we, it is provided that a kind of method that heat exchanger is assembled in flue, including:
Above-mentioned heat exchanger assemblies according to the present invention is provided；
Heat exchanger assemblies is arranged in flue at least one side wall, and every face wall is each perpendicular to flow of flue gas side in flue
To, the fluid flow tube setting parallel with one another of the heat exchanger assemblies in every face wall, the equal level of fluid flow tube of each heat exchanger assemblies
Arrange and make gap, outside be arranged to just to flow of flue gas direction (parallel with flow of flue gas direction)；
Flue sidewall is all stretched out at the two ends of each fluid flow tube；
Union elbow is provided；And
Use union elbow by the same level height in every face wall adjacent along flow of flue gas direction outside flue
The two ends of fluid flow tube are sequentially connected in series, and are thus assembled into heat exchanger.
In the method for the invention, fluid flow tube is preferably formed by the pipe direct cold rolling of diameter 32mm or 38mm or 51mm.
It addition, fluid flow tube two end portions (the non-fin region outside intermediate body portion) again can be reverted to round tube shape so that
Conduit Joint is used directly to be interconnected assembly operation.
Use the present invention method, can the most such as power plant's flue by the heat exchanger group of the present invention
Part is assembled into the heat exchanger of required specification, and packaging efficiency and quality have been effectively ensured.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of the heat-transfer pipe according to the present invention；
Fig. 2 is the schematic cross-section of the heat-transfer pipe according to the present invention；
Fig. 3 is the sectional dimension schematic diagram of the heat-transfer pipe of existing example；
Fig. 4 is the sectional dimension schematic diagram of the corresponding elliptical tube corresponding to Φ 32 equivalent pipe according to the present invention；
Fig. 5 is the sectional dimension schematic diagram of the corresponding elliptical tube corresponding to Φ 38 equivalent pipe according to the present invention；
Fig. 6 is the fluid separation in pipe downstream and whirlpool；
Fig. 7 is the fluid separation in elliptical tube downstream and whirlpool；
Fig. 8 is along with elliptical tube ratio of semi-minor axis length increases, the schematic diagram moved after burble point；
Fig. 9 is the boiler of power plant smoke processing system according to the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described, it should be appreciated by those skilled in the art that enforcement
Example and accompanying drawing are intended merely to be more fully understood that the present invention, are not used to make any restriction.
See Fig. 1, according to the heat-transfer pipe (also referred to as " heat exchanger assemblies ") of the present invention include single elliptical tube 10 with
And the multipair fin (maybe can be referred to as " H type fin ") being mutually aligned longitudinally or axially arranged along elliptical tube 10.According to reality
Situation needs, and every pair of fin is evenly spaced with the spacing of 10-30mm (such as 20mm).The every pair of fin include fin 21 and under
Fin 22.The material of elliptical tube 10, upper fin 21 and lower fin 22 can be selected from carbon steel, ND steel and rustless steel, each
Independent molding is also connected by welding such as high frequency flashing light electric resistance welding subsequently again.Heat-transfer pipe can further be assembled into heat
Exchanger (also referred to as " heat exchanger ") is arranged in the flue of such as power plant, describes in further detail as rear.
Elliptical tube 10 is generally passed through liquid to be heated such as water, is therefore also referred to as " fluid flow tube ".Although diagram elliptical tube
10 total lengths are consistent oval cross section, but elliptical tube 10 can also be designed to two ends remains as circular cross-section, are intended only as main
Oval cross section is made at the middle part of body.This two ends have the elliptical tube 10 of circular cross-section and have excellent during later stage assembly and connection
Gesture, can still use the circular section union elbow of routine to be interconnected.
Upper fin 21 and lower fin 22 are typically directly in high temperature with high dust flue gas or the smoky environment of such as flue, because of
This is also referred to as " the first flue gas fin " and " the second flue gas fin ".Upper fin 21 is identical or basic with lower fin 22 shape
Identical (illustrating mirror image each other), is substantially respectively provided with rectangle outline, and middle body is offered suitable with elliptical tube external surface shape
Or the elliptic arc breach matched is welded on elliptical tube 10 with smooth.The upper fin 21 of every pair of fin and lower fin 22 phase each other
Generally form rectangle outline after being welded on the most between two parties on elliptical tube 10 mutually, but have each other along transverse side
To gap, outside (also referred to as " crack width "), live apart elliptical tube 10 both sides symmetrically in gap, outside.
As in figure 2 it is shown, the long axis length in the cross section oval (outline) of the elliptical tube 10 of the present invention is denoted as 2a, short axial length
Scale is shown as 2b, and elliptical tube wall thickness is denoted as S.The overall rectangle that the upper fin 21 of every pair of fin and lower fin 22 are collectively forming
The long edge lengths of outline is denoted as A, and bond length is denoted as B, outside the level formed between upper fin 21 and lower fin 22
Latasuture gap thickness or up and down distance are denoted as W.
Fig. 3 shows the relevant of as disclosed in CN101762199B one example of existing actually used oval-shaped heat transfer pipe
Size；It is representative corresponding to pipe equivalent caliber (Φ 32 He that Fig. 4 and Fig. 5 then respectively illustrates two kinds according to the present invention
Φ 38) the corresponding oval base tube of heat-transfer pipe and each relative dimensions of fin, the most as shown in table 1 below.
Table 1
Inventor finds when simulation study (as described in detail by rear), and the ratio of semi-minor axis length a/b of elliptical tube is a weight
Want parameter.Ratio of semi-minor axis length value a/b of the elliptical tube of existing heat-transfer pipe such as example shown in Fig. 3 is on the low side (before inventor not
Recognize the importance of this ratio), fail to give full play to heat-transfer capability after base tube is changed into elliptical tube by pipe and significantly improve, flow
The advantage that resistance is greatly reduced, anti-dust stratification ability strengthens and tube bank compactedness is improved.
Be it turned out with optimization and experimental verification by numerical analysis, Flow visualisation, regression analysis: run work at cigarette cooler
Under the conditions of condition, the long and short axle of oval base tube than a/b should between 1.9～2.9, a/b be fluid along elliptical tube flow time, stream
Moving and the important parameter of heat transfer property, it mainly affects as follows.
Can be seen that from Fig. 6 and Fig. 7, compared with pipe, move behind the position of elliptical tube downstream separation point, whirlpool district (wake zone)
Range shorter, whirlpool strength reduction, make the flow resistance of elliptical tube significantly lower than pipe.And with the increase of a/b, burble point
Moving behind position, the range shorter of whirlpool district (wake zone), whirlpool strength reduction, flow resistance reduces further.Layer according to Fig. 8
The result of calculation that laminar boundary layer is theoretical, wherein M is minimum pressure point；S is laminar separation point；U∞For speed of incoming flow (m/s).Invention
The analytical calculation of people also shows: in the flow resistance of external finned tube, and the resistance of light tube outer surface accounts for 40% left side of drag overall
The right side, therefore improves the a/b of elliptical tube, is extremely effective to reducing flow resistance.
Compared with the pipe of same cross section, with the increase of a/b, the girth of elliptical tube increases, and heat exchange area increases；This
Outward, along with the increase of a/b, elliptical tube wake boundary layer thickness is thinning, makes the coefficient of heat transfer of elliptical tube also increase.Numerical analysis and
Experiment confirms: the elliptical tube outer surface coefficient of heat transfer of a/b=2.75 is higher than the outer surface coefficient of heat transfer of a/b=1.67 elliptical tube
Go out about 25%, owing to heat exchange area and the coefficient of heat transfer of elliptical tube outer surface increase simultaneously, make total biography of elliptical tube outer surface
Heat energy power is significantly improved.Even if the heat transfer area in view of elliptical tube exterior light tube portion only accounts for total heat-transfer area outside fin
Long-pending about 1/5, the light pipe portion coefficient of heat transfer has the raising of about 25% also will to make the heat transfer of total heat conduction area outside opposite fins
Coefficient can have the raising of about 5%, and the most surprising in the raising of this degree of field of heat transfer.
For the tube bank of in-line arrangement, dust stratification occurs mainly in the whirlpool district in the region near the front stationary point of pipe and downstream,
Therefore with the increase of a/b, the flow stagnation region near the most front stationary point is reduced, and owing to range shorter and the whirlpool in whirlpool district are strong
Degree weakens, and makes the dust stratification amount in rear vortex district also significantly reduce.
Along with the increase of a/b, elliptical tube is streamlined more preferably, and the reduction of short axle makes the horizontal spacing of tube bank reduce, and saves
Taking up space of pipe group, makes compactedness (heat transfer surface area m can arranged in unit volume of tube bank2/m3) improve.
It addition, even more important being the discovery that of inventor, the width (long limit) of the fin of above-mentioned existing example, highly (short
Limit), the size of crack width and ellipse long and short shaft the most crucial.Because the inappropriate meeting of these sizes makes whole fin
Fin efficiency on the low side, it is impossible to give full play to base tube and changed into the enhancing heat transfer effect of fin after elliptical tube by pipe.Based on institute below
The simulation study described and substantial amounts of on-the-spot test, inventor finally determines fin width A, comprises slotted fin width and exist
In fin extend up and down exist between total height B, ellipse long and short shaft length can the mutual relation of the above-mentioned performance of materially affect,
The ratio of i.e. A Yu 2a and the ratio of B Yu 2b jointly play a key effect (attention parameters B contained crack width W and
Up and down the height sum of fin rather than refer to the height of single fin again).
One of leading indicator parameter evaluating fin performance is fin efficiency, and analytical calculation shows, is oval for base tube
The rectangular fin of pipe, the part fin surface that at and wing root relatively low in fin height, radius of curvature is bigger, its local fin
Efficiency has the highest value, and suitable A/2a and B/2b can be greatly improved the local fin efficiency along fin height direction, its
Value is up to more than 90% so that the average fin efficiency of fin is more than 80%.
Suitably A/2a and B/2b can improve fin and the welding fusion angle of oval base tube, and welding fusion angle reflects H wing
Sheet and the welding contact length of oval base tube, the size of the latter's appreciable impact fin efficiency.Analyze and experiment all confirms: Fig. 3 institute
The welding fusion angle showing existing example is 149 °, and welds fusion angle in an embodiment of the present invention and all can improve to 168 °, increases
Nearly 20 ° are added.
Suitably A/2a and B/2b can improve the fluid average heat transfer coefficient at H fin outer surface, improves the heat transfer of fin
Ability.
The searching exactly that optimizes of fin surface makes the heat transfer coefficient of finned tube, inned coefficient, fin efficiency and flow resistance
A/2a and B/2b time the most optimal, or under certain inned coefficient, suitable A/2a and B/2b can make the biography of fin surface
Hot coefficient, fin efficiency and flow resistance comprehensively reach optimum.
Additionally, the width W that cracks of H type fin also has the effect that self
Dust stratification on the most bootable flue gas purging pipe and fin, obtains certain from ash-removal effect；
The proper width of 2.W can make H fin produce slight self-oscillation, makes fin surface be difficult to dust stratification, has from clear
Ash ability；
Stagnation region near the most front stationary point and the whirlpool district after downstream separation point are that in fin area, heat transfer effect is poor
Region, and the existence of gap W is equivalent to region in this section and is not provided with heat-transfer area.Though arranging a part of heat-transfer area less
Long-pending, but total heat-transfer capability of fin increases.Research shows, with the increase of a/b, cracking (gap) width W can be corresponding
Having reduced, on the basis of optimizing research, the width that cracks of current H type fin may determine that to be 6～12mm.
At least have the advantage that according to the heat-transfer pipe after the improvement of the present invention
1. flow resistance reduces by 7～about 10% further, and the reduction of flow resistance can reduce the power consumption of blower fan further,
Save the operating cost of cigarette cooler.As a example by the cigarette cooler of 1 1000MW unit, station service about 500000 kilowatts can be saved every year
Time.
2. reducing condition and the cost of fan improvement, under suitable conditions, blower fan can not be transformed or small-scale changes
Making, only this item can save the most up to ten million millions of improvement expenses.
3. total heat-transfer capability improves about 10%, as a example by the cigarette cooler of 1 1000MW unit, can save steel weight about
80～100 tons, reduce the manufacturing cost of cigarette cooler.
4. improve the compactedness that pipe group is arranged, compared with former scheme, compactedness (m2/m3) about can improve 5%～8%.
5. there is raising further from deashing ability ability, the number of soot blower can be reduced, saved use steam or compression
The cost of air soot blower and operation energy consumption.
6. make the variation of product piping, be suitable for and meet the demand in market.
Briefly describe as a example by there is the heat-transfer pipe of circular cross-section below by two ends how the most such as power plant's flue assembles
For heat exchanger.
First, heat-transfer pipe is arranged in flue the some face walls adjacent along flue depth direction.Every face wall is the most vertical
Flow of flue gas direction in flue.Same face wall is arranged multiple horizontal heat-transfer pipe from top to bottom, the edge, two ends of its fluid flow tube
Horizontal direction vertically passes the opposing sidewalls of flue, the most up and down the gap, outside between fin just to flow of flue gas direction (or
Gap, outside longitudinal length bearing of trend is parallel with flow of flue gas direction or consistent).In same face wall, fluid flow tube is parallel with one another sets
Put；Use standard circular cross section union elbow by same in upstream and downstream (for flow of flue gas direction) adjacent wall outside flue
The two ends connection in sequential series of the fluid flow tube of level height, is thus assembled into heat exchanger.Fluid flow tube in this same face wall
In parallel but the series connection of wall adjacent with downstream medium high liquid flow pipe arrangement mode can make full use of fume afterheat.It addition, at flue
The mode of outside interconnection fluid flow tube avoids the impact of the internal severe atmosphere of flue, reduces the faults such as leakage and occurs.
It addition, employing said method, easily the heat-transfer pipe Assembling of the present invention can be become required specification
Large-scale heat exchanger, has been effectively ensured packaging efficiency and quality, and has minimized the problems such as transport inconvenience.
Gas cooler is can serve as, at the such as power plant's pot shown in Fig. 9 according to the heat exchanger that the present invention is assembled into
Stove back-end ductwork Mist heat recovering also heats neat stress to realize environment protection emission.Power plant shown in Fig. 9 have employed low low temp. electric
The gas cleaning exhaust system of dedusting technology, can set up the gas cooler of the present invention before low low temp. electric cleaner unit.
As it is shown in figure 9, after the flue gas of boiler 1 out about 300 DEG C enters SCR denitration system 2 denitration, enter sky
Air preheater 3 carries out heat exchange, and the air after preheating is admitted to boiler.It is down to 140 DEG C of left sides from air preheater 3 flue gas out
The right side, subsequently enters the gas cooler (heat exchanger) 4 of the present invention with the heat recirculated water heat exchange with about 70 DEG C.Cool down from flue gas
Device 4 flue gas out is down to about 90 DEG C, subsequently enters low low temp. electric cleaner unit 5 and carries out dedusting and enter back into desulfuration absorbing tower 6
Carry out desulfurization.It is down to about 50 DEG C from desulfuration absorbing tower 6 flue gas out, subsequently enters flue gas heater 7.Flue gas heater 7
Share heat recirculated water with gas cooler 4, carry out entering back into chimney 8 after the neat stress of about 50 DEG C is warming up to about 90 DEG C
Discharge.
It is about 70 DEG C that the inlet water temperature of the gas cooler of the present invention controls, and this can minimize gas cooler and suffer
Flue gas corrosion, takes into account heat exchanger effectiveness simultaneously.It addition, after utilizing common recycle hot water that neat stress is warming up to about 90 DEG C again
Row discharge is not only able to meet environmental requirement, has also taken into account the etching problem of chimney.
Certainly, the gas cooler of the present invention can also have other suitable applications, such as, be used for heating municipal heating systems circulation
Water；Or it is used for heating steam turbine to draw gas heat regenerative system condenses water to reduce the steam amount of drawing gas in low-pressure heater,
And the quantity of steam saved enters and continues work done generating in low pressure (LP) cylinder, to reduce the rate of standard coal consumption etc. of Turbo-generator Set.
Claims (9)
1. utilize fume afterheat to add a heat exchanger assemblies for hot liquid, including:
At least middle part has the fluid flow tube of oval cross section, a length of 2a of the major axis of wherein said ellipse, a length of 2b of short axle；
And
Shape is bonded on single fluid flow tube outer surface and in consistent manner along the axial multipair cigarette spaced apart from each other of described single fluid flow tube
Gas fin, every pair of flue gas fin includes being mutually aligned arrangement and being collectively forming the first flue gas fin and second of rectangle outline
Flue gas fin, wherein the shape of the first flue gas fin and the second flue gas fin is essentially identical, the first flue gas of every pair of flue gas fin
There is the gap, outside along described transverse direction, the long limit of described rectangle a length of between fin and the second flue gas fin
A, a length of B of minor face,
Wherein the ratio of A and 2a is between 1.3 to 2.3；And
The ratio of B and 2b is between 2.0 to 4.0.
Heat exchanger assemblies the most according to claim 1, wherein the ratio of a and b is between 1.9 to 2.9.
Heat exchanger assemblies the most according to claim 1, wherein outside gap thickness W is between 6mm to 12mm.
Heat exchanger assemblies the most according to claim 1, wherein the material of fluid flow tube and/or flue gas fin is selected from carbon element
Steel, ND steel and rustless steel, and flue gas fin and the most independent molding of fluid flow tube by being welded and fused.
Heat exchanger assemblies the most according to claim 1, wherein the two end portions of fluid flow tube has circular cross-section.
6., for the heat exchanger being arranged in flue, hand over according to the heat of one of claim 1-5 including by least one
At least one side wall of exchanger package arrangement, every face wall is each perpendicular to flow of flue gas direction in flue, and every face wall includes at least
One horizontally disposed and the heat exchanger assemblies of flue sidewall, the wherein heat exchange in every face wall are all stretched out in fluid flow tube two ends
The fluid flow tube setting parallel with one another of device assembly and by be positioned at the union elbow outside flue and connect corresponding one end and with along flue gas
The fluid flow tube of the same level height in an adjacent face wall in flow direction downstream is connected in series.
7. method heat exchanger being assembled in flue, including:
There is provided according to the heat exchanger assemblies one of claim 1-5 Suo Shu；
Heat exchanger assemblies is arranged in flue at least one side wall, and every face wall is each perpendicular to flow of flue gas direction in flue,
The fluid flow tube setting parallel with one another of the heat exchanger assemblies in every face wall, the fluid flow tube of each heat exchanger assemblies is the most horizontally disposed
And make gap, outside be arranged to just to flow of flue gas direction；
Flue sidewall is all stretched out at the two ends of each fluid flow tube；
Union elbow is provided；And
Use union elbow by the liquid stream of the same level height in every face wall adjacent along flow of flue gas direction outside flue
The two ends of pipe are sequentially connected in series, and are thus assembled into heat exchanger.
Method the most according to claim 7, wherein fluid flow tube is formed by the pipe direct cold rolling of diameter 32mm to 51mm.
Method the most according to claim 8, wherein fluid flow tube two end portions is reverted to round tube shape again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460010.2A CN106066133A (en) | 2016-06-22 | 2016-06-22 | Single-tube fin type heat exchanger and assembling thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460010.2A CN106066133A (en) | 2016-06-22 | 2016-06-22 | Single-tube fin type heat exchanger and assembling thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106066133A true CN106066133A (en) | 2016-11-02 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610460010.2A Pending CN106066133A (en) | 2016-06-22 | 2016-06-22 | Single-tube fin type heat exchanger and assembling thereof |
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| CN109737794A (en) * | 2019-03-05 | 2019-05-10 | 烟台龙源电力技术股份有限公司 | A kind of heat exchange element |
| CN111578383A (en) * | 2020-04-16 | 2020-08-25 | 宁波奥克斯电气股份有限公司 | Heat exchanger and air conditioner |
| CN114110556A (en) * | 2021-11-17 | 2022-03-01 | 清华大学 | Combined spiral finned tube low-temperature economizer |
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| CN114110556B (en) * | 2021-11-17 | 2023-01-10 | 清华大学 | Combined spiral finned tube low-temperature economizer |
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Application publication date: 20161102 |