CN102901225B - A kind of pressure helical fin coil condensation Heat supply and heat exchange device - Google Patents

A kind of pressure helical fin coil condensation Heat supply and heat exchange device Download PDF

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Publication number
CN102901225B
CN102901225B CN201210356371.4A CN201210356371A CN102901225B CN 102901225 B CN102901225 B CN 102901225B CN 201210356371 A CN201210356371 A CN 201210356371A CN 102901225 B CN102901225 B CN 102901225B
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China
Prior art keywords
helical fin
fin coil
coil pipe
burner
pipe
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CN201210356371.4A
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Chinese (zh)
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CN102901225A (en
Inventor
崔树庆
徐斌
范海源
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Suzhou CQ Heat Exchanger Co.,Ltd.
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SUZHOU CHENGQIANG HEAT EXCHANGER CO Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18Water-storage heaters
    • F24H1/186Water-storage heaters using fluid fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/43Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes helically or spirally coiled
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/44Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40 , e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40
    • F24H1/445Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40 , e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40 with integrated flue gas condenser
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/0005Details for water heaters
    • F24H9/001Guiding means
    • F24H9/0026Guiding means in combustion gas channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/0084Combustion air preheating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/022Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular 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
    • F28F1/34Tubular 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 obliquely
    • F28F1/36Tubular 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 obliquely the means being helically wound fins or wire spirals
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

The invention discloses a kind of pressure helical fin coil condensation Heat supply and heat exchange device, comprise housing, be arranged at the burner in housing and a plurality of helical fin coil pipe, housing is provided with water inlet, delivery port and exhaust opening, burner is connected with air and gas inlet device, burner is positioned at housing upper, one group of a plurality of helical fin coil pipe tube bank is coaxially installed with around burner, be provided with the smoke discharging pipe be made up of a plurality of close-packed arrays helical fin coil pipe below burner, smoke discharging pipe is emptying by exhaust opening; Water inlet is communicated with close-packed arrays helical fin coil pipe a plurality of below burner, and below burner, a plurality of close-packed arrays helical fin coil pipe is communicated with the helical fin coil pipe around burner, and the helical fin coil pipe around burner is communicated with delivery port.The present invention adopts infolding helical fin coil pipe as the primary element of heat exchanger, enhances the heat exchange of fume side, also makes whole heat exchanger volume reduce further simultaneously.

Description

A kind of pressure helical fin coil condensation Heat supply and heat exchange device
Technical field
The invention belongs to Thermal Equipment field, specifically relate to a kind of pressure helical fin coil condensation Heat supply and heat exchange device.
Background technology
After 20th century Middle East Oil Crisis, be economize energy, just have developed the condenser boiler of high thermal efficiency in Europe, its distinguishing feature is that thermal efficiency ratio conventional design boiler improves more than 10%.Owing to making the exhaust gas temperature of boiler be reduced to more than dew point, a large amount of water vapour condensation in flue gas also discharges the latent heat of vaporization, has obvious energy-saving effect, and the condensing heat exchanger applied in condenser boiler develops according to its principle exactly.
Fuel gas buring can comprise latent heat two parts of water vapour in the sensible heat of flue gas and flue gas for the heat utilized.Plain edition heat exchanger is by the restriction of its structure, and high fume temperature, can only utilize the low heat value part of combustion gas; Condensing heat exchanger due to exhaust gas temperature very low, the sensible heat that fully can not only absorb flue gas can also absorb latent heat, utilization be the high heating value of flue gas.Therefore, the utilization efficiency of heat energy of condensing heat exchanger can improve greatly.In order to fully absorb the heat of high-temperature flue gas and collect condensate water, it generally adopts secondary heat exchange mode, during work, high-temperature flue gas enters sensible heat exchanger and condensation segment heat exchanger successively from the bottom to top, and water (flow) direction is just in time contrary, first through condensation segment heat exchanger, cold water after condensation segment heat exchanger absorbs high-temperature flue gas waste heat, then enters main heat exchanger absorption flame sensible heat.After heat exchanger absorbs sensible heat and latent heat, flue-gas temperature will be down to normal temperature, discharged by top flue, in order to safe and reliable discharge flue gas, condensing heat exchanger adopts the mode of forced fume exhaust to discharge flue gas, make the condensation as much as possible of the water vapour in flue gas, this just make the latent heat amount that absorbed by the water that heats and sensible heat amount more, its energy-saving effect is better.Therefore condensing heat exchanger make use of the heat fallen as flue gas loss, heat loss due to exhaust gas has been become useful heat, and the degree that this part heat effectively utilizes determines the energy-saving effect of condensing heat exchanger.
But enter the flue gas of condensing heat exchanger generally in superheat state, along with the reduction of flue-gas temperature and the condensation of steam, flue gas is gradually to saturation state transition, and finally reach capacity state.Experimentally measure, when exhaust gas temperature is at 50 ° of about C, condensing heat exchanger exhanst gas outlet state is close to saturation state, and component, the heat exchanger structure of close degree and flue gas are relevant with heat and mass transfer process.Experimental data shows, and in prior art, the flow path of flue gas still exists much " dead band " phenomenon or " short circuit " state, reduces heat exchange efficiency.
1. the Heat supply and heat exchange device of traditional non-condensing boiler is made up of carbon steel or cast iron, and the exhaust gas temperature when designing is general all higher than 150 DEG C, does not consider to absorb water vapor condensation in flue gas and discharges a large amount of sensible heat and latent heat, do not have condensed water to produce.
2. condensing boiler has the feature of high-efficient energy-saving environment friendly, is the developing direction of boiler industry and is promoted widely.Condensing boiler is owing to creating a large amount of faintly acid condensed water, if use the materials such as conventional steel plate or cast iron to manufacture condensing boiler Heat supply and heat exchange device by the life-span of serious curtailment condensing boiler, so condensing boiler Heat supply and heat exchange device must use stainless steel or cast aluminium to be processed into.At present, stainless steel bare tube or the cast aluminium of adopting is made more.
3. be mature on the whole by the technology of cast-aluminum die processing heat exchanger, but the many Heat supply and heat exchange devices of 500KW can only be made.It is high to there is die cost in large-scale cast aluminium piece, and processing technology is complicated, the problem that product rejection rate is high, and making cannot with cast-aluminum die direct machining large Heat supply and heat exchange device.
4. in normal circumstances, the thermal efficiency can reach about 96% at most to these two kinds of heat exchangers.
5., when the return water temperature of boiler is higher than 60 DEG C, boiler will not produce condensed water.At this moment heat exchanger can only sensible heat in recovered flue gas, and the thermal efficiency also only has about 87%.
6. air preheater generally adopts in the large-sized boilers such as power station.Also do not adopt in heating boiler.
7. traditional Heat supply and heat exchange device demand different according to client manufactures and designs the Heat supply and heat exchange device varied in size, and heat exchanger varies in size, and required parts are also different, are unfavorable for industrialized mass production.
Summary of the invention
In view of above-mentioned prior art Problems existing, propose the present invention.
Therefore, the technical problem to be solved in the present invention is, how to overcome the not enough problem causing the heat exchange of flow of flue gas path insufficient of heat exchanger structure design in prior art, how to improve heat-transfer area structure and increase to reach the object that heat exchange area improves heat exchange efficiency, make boiler can do less under Same Efficieney simultaneously, take less volume, and how air preheater is attached in heat exchanger cleverly, thus carry out secondary heat exchange, reduce exhaust gas temperature further while the initial temperature that raising air enters.
For solving the problems of the technologies described above, the invention provides following technical scheme: a kind of pressure helical fin coil condensation Heat supply and heat exchange device, comprise housing, be arranged at the burner in housing and a plurality of helical fin coil pipe, housing is provided with water inlet, delivery port and exhaust opening, burner is connected with air and gas inlet device, burner is positioned at housing upper, one group of a plurality of helical fin coil pipe tube bank is coaxially installed with around burner, the smoke discharging pipe be made up of a plurality of close-packed arrays helical fin coil pipe is provided with below burner, smoke discharging pipe is emptying by exhaust opening, water inlet is communicated with close-packed arrays helical fin coil pipe a plurality of below burner, and below burner, a plurality of close-packed arrays helical fin coil pipe is communicated with the helical fin coil pipe around burner, and the helical fin coil pipe around burner is communicated with delivery port.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: bending or extrusion process are carried out to the fin that described helical fin coil pipe is restrained and described a plurality of close-packed arrays helical fin coil pipe is adjacent, helical fin coil pipe both sides fin infolding at an angle, two infolding faces that finned tube is formed are parallel or present certain angle.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: described helical fin coil pipe tube bank and described a plurality of close-packed arrays helical fin coil pipe are all sticked to form by a plurality of helical fin coil pipe turned upside down.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: the arranged outside of described helical fin coil pipe tube bank has outer deflector.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: described outer deflector is " V " type helical form deflector, fit with outside helical fin coil pipe, the adjacent of compact arranged helical fin coil pipe and the flow-guiding mouth of outer deflector stagger mutually.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: the inner side forming a plurality of close-packed arrays helical fin coil pipes of smoke discharging pipe below described burner is provided with inner deflector.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: described inner deflector is the cylindric deflector with multiple hole and/or seam on it, fit with inside helical fin coil pipe, a plurality of adjacent of close-packed arrays helical fin coil pipe and the flow-guiding mouth of inner deflector stagger mutually.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: in described smoke discharging pipe, be provided with air preheater; Described air preheater is connected with air inlet device through smoke discharging pipe; Described exhaust opening is tubing type exhaust opening, and its upper end is exhaust opening, and its lower end is condensation-water drain, and middle part is the air intlet of air preheater.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: the air preheater in described smoke discharging pipe is one or more cuboid or cylindrical air air inlet pipe.
As a kind of preferred version of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: burner is positioned at lower housing portion, be coaxially installed with one group around burner to be restrained by the helical fin coil pipe of the tight circumference uniform distribution of a plurality of fin straight tubes, be provided with the smoke discharging pipe be made up of a plurality of close-packed arrays helical fin coil pipe above burner, smoke discharging pipe is emptying by exhaust opening; Water inlet is communicated with close-packed arrays helical fin coil pipe a plurality of above burner, and above burner, a plurality of close-packed arrays helical fin coil pipe is communicated with the helical fin coil pipe around burner, and the helical fin coil pipe around burner is communicated with delivery port.
Adopt technical scheme of the present invention, there is following Advantageous Effects:
Integral arrangement of the present invention can improve heat exchange efficiency.Present invention employs burner and be arranged on top, exhaust opening is arranged on the secondary countercurrent flow arrangement of below, flue gas after burner combustion flows downward above heat exchanger, first through finned tube and outer deflector around burner, then through finned tube and the inner deflector of smoke discharging pipe, along smoke discharging pipe, adverse current is emptying to exhaust opening.And water inlet is arranged on exhaust opening place, bottom, delivery port is arranged on heat exchanger top, and water is by water inlet, finned tube, and heat exchanger two ends connect the cavity of upper and lower finned-tube bundle, such as, can be upper jellyfish pipe and lower jellyfish pipe, discharge eventually through delivery port.Take the heat exchange mode of adverse current, the outlet temperature of water, just more likely higher than exhaust gas temperature, can improve heat exchange efficiency greatly, increases heat exchange amount.
Finned tube after secondary operations of the present invention can significantly improve heat exchange efficiency.The present invention adopts helical fin coil pipe as the primary element forcing helical fin coil condensation Heat supply and heat exchange device, on the surface of heat exchanger tube by with fin, increase the external surface area of heat exchanger tube thus reach the object improving heat exchange efficiency, enhance the heat exchange of fume side, whole heat exchanger volume can be made to reduce further.By carrying out secondary operations to fin, such as bending or extruding, spacing between the light pipe of finned tube is obviously reduced, thus make flue gas stream and light pipe carry out contact scour more fully, strengthen heat exchange, improve turbulent fluctuation degree, increase convection transfer rate, effectively reach the object strengthening heat transfer, improve heat exchange efficiency, make whole heat exchanger volume reduce further simultaneously.
The present invention is provided with outer, inner deflector, is conducive in " dead band " that reduce flue gas stream, improves shell-side fluid velocity flow profile further.In the present invention, by increasing some outer deflectors outside circumference finned-tube bundle and between shell and being positioned at the inner deflector inside smoke discharging pipe finned tube, the flow path of flue gas is made to be close to fin and light pipe, heat exchange can be strengthened further, obviously improve shell-side fluid velocity flow profile, reduce in " dead band " or " short circuit " of flue gas stream.
The present invention is further provided with air preheater, can raise the efficiency.In the present invention, air preheater combines dexterously and is arranged in the discharge duct of heat exchanger, when reaching less than-20 DEG C at winter makes outdoor air, fume afterheat is utilized to improve the air themperature entering burner hearth, further reduction exhaust gas temperature, makes efficiency reach more than 98%, has positive effect.
Accompanying drawing explanation
Fig. 1 is the main body schematic diagram forcing helical fin coil condensation Heat supply and heat exchange device according to one embodiment of the invention.
Fig. 2 is the schematic perspective view of pressure helical fin coil condensation Heat supply and heat exchange device of the present invention.
Fig. 3 forces the structure of helical fin coil condensation Heat supply and heat exchange device to be analysed and observe and operation principle schematic diagram in one embodiment of the invention.
Fig. 4 is that sectional view is looked on the right side of the structure of the pressure helical fin coil condensation Heat supply and heat exchange device with an air preheater of the present invention.
Fig. 5 be in one embodiment of the invention air preheater be positioned at top time the pressure helical fin coil condensation Heat supply and heat exchange device right side look sectional view.
Fig. 6 is the helical fin coil pipe tube bank schematic diagram of several helical fin coil pipe close-packed arrays of the present invention composition.
Fig. 7 is helical fin coil pipe of the present invention tube bank schematic front view.
Fig. 8 is that Fig. 7 A-A is to cross-sectional schematic.
Fig. 9 is that the B of Fig. 8 is to enlarged diagram.
Figure 10 is the operation principle schematic diagram that flue gas crosses outer deflector.
Figure 11 is the operation principle schematic diagram that flue gas crosses inner deflector.
Figure 12 is the right TV structure schematic diagram with the pressure helical fin coil condensation Heat supply and heat exchange device of two air preheaters in another embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and it only for explaining the present invention, and can not be interpreted as limitation of the present invention.
As shown in Fig. 1 ~ Figure 12, comprising: upper jellyfish pipe 1, front apron 2, housing 3, helical fin coil pipe tube bank 4, outer deflector 5, burner 6, inner deflector 7, a plurality of close-packed arrays helical fin coil pipe 8, lower jellyfish pipe 9, backboard 10, air preheater 11, exhaust opening 12, delivery port 13, water inlet 14, smoke discharging pipe 15, condensation-water drain 16, air intlet 17.
The pressure helical fin coil condensation Heat supply and heat exchange device of one embodiment of the invention is described with reference to figure 1 ~ Fig. 4.As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, a kind of pressure helical fin coil condensation Heat supply and heat exchange device, comprise housing 3, burner 6 and helical fin coil pipe tube bank 4 and a plurality of close-packed arrays helical fin coil pipe 8, jellyfish pipe 1 and lower jellyfish pipe 9 on one group is respectively provided with in described housing 3 both sides, wherein the upper jellyfish pipe 1 of side is communicated with lower jellyfish pipe 9, the lower jellyfish pipe 9 of opposite side is installed into the mouth of a river 14, and upper jellyfish pipe 1 then installs delivery port 13.Multiple helical fin coil pipe turned upside down is sticked to form one group.Helical fin coil pipe tube bank 4 is provided with around burner 6.The smoke discharging pipe 15 be made up of a plurality of close-packed arrays helical fin coil pipe 8 is provided with below burner 6.
Described side is provided with front apron 2 and backboard 10 inside shell two ends, and side shell and front apron 2 and backboard 10 are welded and fixed.In one embodiment, described front apron 2 and backboard 10 all adopt insulation material to make.
As shown in FIG., heat exchanger shell 3 have delivery port 13 and water inlet 14.Housing 3 is also provided with exhaust opening 12, and described exhaust opening 12 is tubing type exhaust opening 12, and its upper end is exhaust opening 12, and its lower end is condensation-water drain 16, and middle part is the air intlet 17 of air preheater 11.
As shown in Figure 3, Fig. 3 forces the structure of helical fin coil condensation Heat supply and heat exchange device to be analysed and observe and operation principle schematic diagram in one embodiment of the invention.In this embodiment, this pressure helical fin coil condensation Heat supply and heat exchange device, comprise housing 3, be arranged at the burner 6 in housing 3 and a plurality of helical fin coil pipe, housing 3 is provided with water inlet 14, delivery port 13 and exhaust opening 12, burner 6 is connected with air and gas inlet device, burner 6 is positioned at housing 3 top, helical fin coil pipe tube bank 4 is coaxially installed with around burner 6, the arranged outside of described helical fin coil pipe tube bank 4 has outer deflector 5, this outer deflector 5 is " V " type helical form deflector, fit with outside helical fin coil pipe, the adjacent of compact arranged helical fin coil pipe and the flow-guiding mouth of outer deflector 5 stagger mutually, be provided with the smoke discharging pipe 15 be made up of a plurality of close-packed arrays helical fin coil pipe 8 below burner 6, smoke discharging pipe 15 is emptying by exhaust opening 12, be provided with the air preheater 11 including one or more cuboid or cylindrical air air inlet pipe in described smoke discharging pipe 15, this air preheater 11 is air inlet pipe, described water inlet 14 is communicated with close-packed arrays helical fin coil pipe 8 a plurality of below burner 6, below burner 6, a plurality of close-packed arrays helical fin coil pipe 8 is communicated with the helical fin coil pipe around burner 6, and the helical fin coil pipe around burner 6 is communicated with delivery port 13.
The inner side forming a plurality of close-packed arrays helical fin coil pipes 8 of smoke discharging pipe 15 below described burner 6 is provided with inner deflector 7, described inner deflector 7 is for it being had the cylindric deflector of multiple hole and/or seam, fit with inside helical fin coil pipe, a plurality of adjacent of close-packed arrays helical fin coil pipe 8 and the flow-guiding mouth of inner deflector 7 stagger mutually.
Described air preheater 11 is connected with air inlet device through smoke discharging pipe 15; Described exhaust opening 12 is tubing type exhaust opening 12, and its upper end is exhaust opening 12, and its lower end is condensation-water drain 16, and middle part is the air intlet 17 of air preheater 11.
As shown in Figure 4, Fig. 4 is that sectional view is looked on the right side of the structure of the pressure helical fin coil condensation Heat supply and heat exchange device with an air preheater of the present invention.Fundamental diagram can be recognized clearly thus, and helical fin coil pipe tube bank 4 is positioned at the top of a plurality of close-packed arrays helical fin coil pipe 8, and helical fin coil pipe tube bank 4 and a plurality of close-packed arrays helical fin coil pipe 8 parallel.Described burner 6 is coaxially installed in helical fin coil pipe tube bank 4, and burner 6 is connected with air and gas inlet device.The smoke discharging pipe 15 be made up of a plurality of close-packed arrays helical fin coil pipe 8 is provided with below burner 6.
The present invention adopts secondary heat exchange mode, adopts counter-flow arrangement heat exchange, and high-temperature flue gas is from top to bottom through helical fin coil pipe tube bank 4, a plurality of close-packed arrays helical fin coil pipe 8; And water (flow) direction is just in time contrary, first through a plurality of close-packed arrays helical fin coil pipe 8, then through helical fin coil pipe tube bank 4.Air preheater 11 is arranged in smoke discharging pipe 15, can carry out heat exchange with flue gas, improves the air themperature entering burner hearth thus and reduces exhaust gas temperature further simultaneously.
In this embodiment, water inlet 14, a plurality of close-packed arrays helical fin coil pipe 8, upper jellyfish pipe 1, helical fin coil pipe tube bank 4, lower jellyfish pipe 9, delivery port 13, form the loop of water heating process.
As shown in Figure 5, Fig. 5 be in one embodiment of the invention air preheater be positioned at top time the pressure helical fin coil condensation Heat supply and heat exchange device right side look sectional view.In this embodiment, burner 6 is positioned at housing 3 bottom, be coaxially installed with one group around burner 6 and restrain 4 by the helical fin coil pipe of the tight circumference uniform distribution of a plurality of fin straight tubes, be provided with the smoke discharging pipe 15 be made up of housing 3 and a plurality of close-packed arrays helical fin coil pipe 8 above burner 6, smoke discharging pipe 15 is emptying by exhaust opening 12; Water inlet 14 is communicated with close-packed arrays helical fin coil pipe 8 a plurality of above burner 6, above burner 6, a plurality of close-packed arrays helical fin coil pipe 8 is communicated with the helical fin coil pipe around burner 6, and the helical fin coil pipe around burner 6 is communicated with delivery port 13.
Now, adopt counter-flow arrangement high-temperature flue gas from the bottom to top through one-level sensible heat transfer and B-grade condensation heat exchange; And water (flow) direction is just in time contrary, first have passed through B-grade condensation heat exchange, then through one-level sensible heat transfer.Backwater is after B-grade condensation heat exchange absorbs fume afterheat, enter again in one-level sensible heat transfer and absorb high-temperature flue gas sensible heat, air preheater 11 carries out three grades of heat exchange through B-grade condensation heat exchanger and flue gas, and raising enters the air themperature of heat exchanger and reduces exhaust gas temperature further.
As shown in Fig. 6 ~ Figure 11, helical fin coil pipe tube bank 4 to be sticked to form by a plurality of helical fin coil pipe turned upside down and described helical fin coil pipe to be restrained to 4 adjacent fins carries out bending or extrusion process, makes fin along tube bank axially infolding at an angle.Certainly, also directly cutting process can be carried out.Infolding face, finned tube both sides can be parallel or angled, is convenient to the close-packed arrays of adjacent fins pipe.
As shown in Figure 10, Figure 10 is the operation principle schematic diagram that flue gas crosses outer deflector.The arranged outside of described helical fin coil pipe tube bank 4 has outer deflector 5, described outer deflector 5 is " V " type helical form deflector, fit with outside helical fin coil pipe, the adjacent of compact arranged helical fin coil pipe and the flow-guiding mouth of outer deflector 5 stagger mutually.
As shown in figure 11, Figure 11 is the operation principle schematic diagram that flue gas crosses inner deflector, a plurality of close-packed arrays helical fin coil pipe 8 is combined into cylindrical shape, and, the fin adjacent to described a plurality of close-packed arrays helical fin coil pipe 8 carries out bending or extrusion process, makes fin along the axial infolding at an angle of tube bank.Certainly, also directly cutting process can be carried out.The inner side of described a plurality of close-packed arrays helical fin coil pipe 8 is provided with inner deflector 7, described inner deflector 7 is for it being had the cylindric deflector of multiple hole and/or seam, fit with inside helical fin coil pipe, a plurality of adjacent of close-packed arrays helical fin coil pipe 8 and the flow-guiding mouth of inner deflector 7 stagger mutually.
As shown in figure 12, Figure 12 is the right TV structure schematic diagram with the pressure helical fin coil condensation Heat supply and heat exchange device of two air preheaters in another embodiment of the present invention.The air preheater 11 with two cuboid air intake ducts is provided with in described smoke discharging pipe 15.
To sum up, how the present invention improves heat-transfer area structure from research, increases heat exchange area to improve heat exchange efficiency.It adopts infolding helical fin coil pipe as the primary element forcing helical fin coil condensation Heat supply and heat exchange device, enhances the heat exchange of fume side, also makes whole heat exchanger volume reduce further simultaneously.
By the navigation designing of outer deflector 5 and inner deflector 7, make the flow path of flue gas be close to finned tube, strengthen heat exchange further, obviously improve shell-side fluid velocity flow profile, reduce " dead band " or " short circuit " phenomenon of flue gas stream.And air preheater 11 is combined in heat exchanger by invention dexterously, show by experiment, when reaching less than-20 DEG C at winter makes outdoor air, reducing exhaust gas temperature further while of utilizing fume afterheat to improve the air themperature entering burner hearth, making efficiency reach more than 98%.
Meanwhile, the present invention, to key components and parts modularized design, is easy to mass production, reduces the production difficulty of heat exchanger, saves production cost.
It should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (7)

1. force helical fin coil condensation Heat supply and heat exchange device for one kind, comprise housing (3), be arranged at the burner (6) in housing (3) and helical fin coil pipe, housing (3) is provided with water inlet (14), delivery port (13) and exhaust opening (12), burner (6) is connected with air and gas inlet device, it is characterized in that:
Burner (6) is positioned at housing (3) top, burner (6) is coaxially installed with helical fin coil pipe tube bank (4) around, burner (6) below is provided with the smoke discharging pipe (15) be made up of a plurality of close-packed arrays helical fin coil pipe (8), and smoke discharging pipe (15) is emptying by exhaust opening (12);
Water inlet (14) is communicated with a plurality of close-packed arrays helical fin coil pipe (8) in burner (6) below, the a plurality of close-packed arrays helical fin coil pipe (8) in burner (6) below is communicated with burner (6) helical fin coil pipe around, burner (6) helical fin coil pipe is around communicated with delivery port (13)
Bending or extrusion process are carried out to described helical fin coil pipe tube bank (4) and the adjacent fin of described a plurality of close-packed arrays helical fin coil pipe (8), helical fin coil pipe both sides fin infolding at an angle, two infolding faces that finned tube is formed are parallel or present certain angle
The arranged outside of described helical fin coil pipe tube bank (4) has outer deflector (5),
Described outer deflector (5) is " V " type helical form deflector, fits with outside helical fin coil pipe, and the adjacent of compact arranged helical fin coil pipe and the flow-guiding mouth of outer deflector (5) stagger mutually.
2. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 1, is characterized in that: described helical fin coil pipe tube bank (4) and described a plurality of close-packed arrays helical fin coil pipe (8) are all sticked to form by a plurality of helical fin coil pipe turned upside down.
3. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 1, is characterized in that: the inner side of a plurality of close-packed arrays helical fin coil pipes (8) of described burner (6) below composition smoke discharging pipe (15) is provided with inner deflector (7).
4. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 3, it is characterized in that: described inner deflector (7) is for it being had the cylindric deflector of multiple hole and/or seam, fit with inside helical fin coil pipe, the adjacent of a plurality of close-packed arrays helical fin coil pipe (8) and the flow-guiding mouth of inner deflector (7) stagger mutually.
5. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 1, is characterized in that: be provided with air preheater (11) in described smoke discharging pipe (15); Described air preheater (11) is connected with air inlet device through smoke discharging pipe (15); Described exhaust opening (12) is tubing type exhaust opening, and its upper end is exhaust opening (12), and its lower end is condensation-water drain (16), and middle part is the air intlet (17) of air preheater (11).
6. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 5, is characterized in that: the air preheater (11) in described smoke discharging pipe (15) is one or more cuboid or cylindrical air air inlet pipe.
7. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 1, it is characterized in that: burner (6) is positioned at housing (3) bottom, burner (6) is coaxially installed with helical fin coil pipe tube bank (4) around, burner (6) top is provided with the smoke discharging pipe (15) be made up of housing (3) and a plurality of close-packed arrays helical fin coil pipe (8), and smoke discharging pipe (15) is emptying by exhaust opening (12); Water inlet (14) is communicated with a plurality of close-packed arrays helical fin coil pipe (8) in burner (6) top, the a plurality of close-packed arrays helical fin coil pipe (8) in burner (6) top is communicated with burner (6) helical fin coil pipe around, and burner (6) helical fin coil pipe is around communicated with delivery port (13).
CN201210356371.4A 2012-09-21 2012-09-21 A kind of pressure helical fin coil condensation Heat supply and heat exchange device Active CN102901225B (en)

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PCT/CN2013/083900 WO2014044208A1 (en) 2012-09-21 2013-09-22 Forced spiral finned coil condensation heat-supplying heat exchanger
US14/494,819 US20150007779A1 (en) 2012-09-21 2014-09-24 Spiral finned coil condensing heat exchanger

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