CN102901225A - Forced spiral finned coil pipe condensation heat-supply heat exchanger - Google Patents

Forced spiral finned coil pipe condensation heat-supply heat exchanger Download PDF

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Publication number
CN102901225A
CN102901225A CN2012103563714A CN201210356371A CN102901225A CN 102901225 A CN102901225 A CN 102901225A CN 2012103563714 A CN2012103563714 A CN 2012103563714A CN 201210356371 A CN201210356371 A CN 201210356371A CN 102901225 A CN102901225 A CN 102901225A
Authority
CN
China
Prior art keywords
helical fin
fin coil
burner
heat exchange
coil pipe
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.)
Granted
Application number
CN2012103563714A
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Chinese (zh)
Other versions
CN102901225B (en
Inventor
崔树庆
徐斌
范海源
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou CQ Heat Exchanger Co.,Ltd.
Original Assignee
SUZHOU CHENGQIANG HEAT EXCHANGER CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SUZHOU CHENGQIANG HEAT EXCHANGER CO Ltd filed Critical SUZHOU CHENGQIANG HEAT EXCHANGER CO Ltd
Priority to CN201210356371.4A priority Critical patent/CN102901225B/en
Publication of CN102901225A publication Critical patent/CN102901225A/en
Priority to PCT/CN2013/083900 priority patent/WO2014044208A1/en
Priority to US14/494,819 priority patent/US20150007779A1/en
Application granted granted Critical
Publication of CN102901225B publication Critical patent/CN102901225B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 forced spiral finned coil pipe condensation heat-supply heat exchanger, which comprises a shell, a combustor arranged in the shell and a plurality of spiral finned coil pipes, wherein a water inlet, a water outlet and a smoke outlet are formed on the shell; the combustor is connected with an air and gas inlet device; the combustor is positioned on the upper part of the shell; the periphery of the combustor is coaxially provided with a group of pipe bundles consisting of a plurality of spiral finned coil pipes; a smoke exhaust pipeline which consists of a plurality of tightly arranged spiral finned coil pipes is arranged below the combustor; the smoke exhaust pipeline is emptied through a smoke outlet; the water inlet is communicated with the spiral finned coil pipes which are tightly arranged below the combustor; the spiral finned coil pipes which are tightly arranged below the combustor are communicated with the spiral finned coil pipes at the periphery of the combustor; and the spiral finned coil pipes at the periphery of the combustor are communicated with the water outlet. The inwards folded finned straight pipes serve as basic elements of the heat exchanger, the heat exchange on the smoke side is intensified, and the size of the whole heat exchanger is further reduced.

Description

A kind of pressure helical fin coil condensation Heat supply and heat exchange device
Technical field
The invention belongs to the 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 energy savings, just 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%.Because the exhaust gas temperature of boiler is reduced to more than the dew point, a large amount of water vapour condensations and discharge the latent heat of vaporization in the flue gas have obvious energy-saving effect, and the condensing heat exchanger that applies in the condenser boiler develops according to its principle exactly.
Fuel gas buring can comprise for the heat that utilizes latent heat two parts of water vapour in the sensible heat of flue gas and the flue gas.The plain edition heat exchanger is subjected to the restriction of its structure, and high fume temperature can only utilize the low heat value part of combustion gas; Condensing heat exchanger since exhaust gas temperature very low, the sensible heat that not only can fully 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.For heat and the collection condensate water that fully absorbs high-temperature flue gas, its general secondary heat exchange mode that adopts, 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 opposite, pass through first the condensation segment heat exchanger, cold water enters main heat exchanger again and absorbs the flame sensible heat after the condensation segment heat exchanger absorbs the high-temperature flue gas waste heat.Flue-gas temperature will be down to normal temperature after heat exchanger absorbs sensible heat and latent heat, discharged by the top flue, for safe and reliable discharge flue gas, condensing heat exchanger adopts the mode of forced fume exhaust to discharge flue gas, condense so that the water vapour in the flue gas is as much as possible, this latent heat amount and sensible heat amount that heated water is absorbed is just more, and its energy-saving effect is just better.So condensing heat exchanger has utilized the heat that falls as flue gas loss, and heat loss due to exhaust gas has been become useful heat, the degree that this part heat effectively utilizes has determined the energy-saving effect of condensing heat exchanger.
Yet the flue gas that enters condensing heat exchanger generally is superheat state, and along with the reduction of flue-gas temperature and the condensation of steam, flue gas is gradually to the saturation state transition, and state at last reaches capacity.According to measuring, when exhaust gas temperature about 50 ° of C, condensing heat exchanger exhanst gas outlet state is close to saturation state, approaching degree is relevant with the component of flue gas, heat exchanger structure and heat and mass transfer process.Experimental data shows that in the prior art, the flow path of flue gas still exists much " dead band " phenomenon or " short circuit " state, has reduced heat exchange efficiency.
1. the Heat supply and heat exchange device of traditional non-condensing boiler is made by carbon steel or cast iron, and the exhaust gas temperature in when design generally all is higher than 150 ℃, does not consider to absorb that water vapor condensation discharges a large amount of sensible heats and latent heat in the flue gas, does not have the condensed water generation.
2. condensing boiler has the characteristics of high-efficient energy-saving environment friendly, is the developing direction of boiler industry and is promoted widely.Condensing boiler is owing to produced a large amount of faintly acid condensed waters, condensing boiler Heat supply and heat exchange device will seriously shorten the life-span of condensing boiler if use the materials such as steel plate commonly used or cast iron to make condensing boiler Heat supply and heat exchange device, so must use stainless steel or cast aluminium to be processed into.At present, adopt stainless steel light pipe or cast aluminium to make more.
3. the technology with cast-aluminum die processing heat exchanger is mature on the whole, but can only make the many Heat supply and heat exchange devices of 500KW.Large-scale cast aluminium piece exists die cost high, and processing technology is complicated, and the problem that product rejection rate is high is so that can't be with the direct machining large Heat supply and heat exchange of cast-aluminum die device.
These two kinds of heat exchangers in normal circumstances, the thermal efficiency can reach about 96% at most.
5. the return water temperature when boiler is higher than 60 ℃, and boiler will not produce condensed water.At this moment the sensible heat of heat exchanger in can only recovered flue gas, the thermal efficiency also only has about 87%.
6. air preheater generally adopts in the large-sized boilers such as power station.In heating boiler, also do not adopt.
7. traditional Heat supply and heat exchange device manufactures and designs the Heat supply and heat exchange device that varies in size according to the different demand of client, and heat exchanger varies in size, and required parts are also different, are unfavorable for industrialized mass production.
Summary of the invention
Problem in view of above-mentioned prior art exists has proposed the present invention.
Therefore, the technical problem to be solved in the present invention is, how to overcome in the prior art heat exchanger structure design deficiency and cause the inadequate problem of flow of flue gas path heat exchange, how to improve the heat-transfer area structure and increase the purpose that heat exchange area improves heat exchange efficiency to reach, simultaneously so that boiler can be done littlely under Same Efficieney, take less volume, and how to be attached to cleverly air preheater in the heat exchanger, thereby carry out secondary heat exchange, further reduce exhaust gas temperature when improving the initial temperature that 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 burner and a plurality of helical fin coil pipe in the housing, be provided with water inlet on the housing, delivery port and exhaust opening, burner is connected with air and gas inlet device, burner is positioned at housing top, be coaxially installed with one group of a plurality of helical fin coil pipe tube bank around the burner, the burner below is provided with the smoke discharging pipe that is comprised of a plurality of close-packed arrays helical fin coil pipes, and smoke discharging pipe is emptying by exhaust opening; Water inlet is communicated with a plurality of close-packed arrays helical fin coil pipes in burner below, and a plurality of close-packed arrays helical fin coil pipes in burner below are communicated with burner helical fin coil pipe on every side, and the helical fin coil pipe around the burner is communicated with delivery port.
A kind of preferred version as pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: bending or extrusion process are carried out in described helical fin coil pipe tube bank and the adjacent fin of described a plurality of close-packed arrays helical fin coil pipes, helical fin coil pipe both sides fin is infolding at an angle, and formed two the infolding faces of finned tube 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 all are 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.
A kind of preferred version as 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 the helical fin coil pipe outside, 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 inboard that described burner below forms a plurality of close-packed arrays helical fin coil pipes of smoke discharging pipe is provided with interior deflector.
A kind of preferred version as pressure helical fin coil condensation Heat supply and heat exchange device of the present invention, wherein: described interior deflector is for having the cylindric deflector of a plurality of holes and/or seam on it, fit with the helical fin coil pipe is inboard, the adjacent of a plurality of close-packed arrays helical fin coil pipes and the flow-guiding mouth of interior 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: be provided with air preheater in the described smoke discharging pipe; Described air preheater passes smoke discharging pipe and is connected with air inlet device; Described exhaust opening is the tubing type exhaust opening, and its upper end is exhaust opening, and its lower end is condensation-water drain, and the 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 the described smoke discharging pipe is one or more cuboid or cylindrical air intake duct.
A kind of preferred version as 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 the burner by the helical fin coil pipe tube bank of the tight circumference uniform distribution of a plurality of fin straight tubes, the burner top is provided with the smoke discharging pipe that is comprised of a plurality of close-packed arrays helical fin coil pipes, and smoke discharging pipe is emptying by exhaust opening; Water inlet is communicated with a plurality of close-packed arrays helical fin coil pipes in burner top, and a plurality of close-packed arrays helical fin coil pipes in burner top are communicated with burner helical fin coil pipe on every side, and the helical fin coil pipe around the burner is communicated with delivery port.
Adopt technical scheme of the present invention, have following useful technique effect:
Integral arrangement of the present invention can improve heat exchange efficiency.The present invention has adopted burner to be arranged on the top, exhaust opening is arranged on the secondary countercurrent flow arrangement of below, flue gas after the burner combustion flows downward from the heat exchanger top, pass first burner on every side finned tube and outer deflector, then pass finned tube and the interior 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, and delivery port is arranged on heat exchanger top, and water is by water inlet, finned tube, and the heat exchanger two ends connect the up and down cavity of finned-tube bundle, for example can be upper jellyfish pipe and lower jellyfish pipe, finally discharge by delivery port.Take the heat exchange mode of adverse current, the outlet temperature of water just more likely is higher than exhaust gas temperature, can greatly improve heat exchange efficiency, increases the heat exchange amount.
Finned tube after the secondary operations of the present invention can significantly improve heat exchange efficiency.The present invention adopts the helical fin coil pipe as the primary element of forcing helical fin coil condensation Heat supply and heat exchange device, on the surface of heat exchanger tube by with fin, thereby the external surface area that increases heat exchanger tube reaches the purpose that improves heat exchange efficiency, strengthened the heat exchange of fume side, whole heat exchanger volume is further reduced.By fin is carried out secondary operations, for example bending or extruding, so that spacing obviously reduces between the light pipe of finned tube, thereby so that smoke gas flow and light pipe carry out more fully contact scour, strengthen heat exchange, improve the turbulent fluctuation degree, increase convection transfer rate, effectively reach the purpose that strengthens heat transfer, improved heat exchange efficiency, whole heat exchanger volume is further reduced.
The present invention is provided with outer, interior deflector, is conducive to reduce " dead band " of smoke gas flow, further improves the shell-side fluid velocity flow profile.Among the present invention, by increasing some outer deflectors between the circumference finned-tube bundle outside and shell and the deflector that is positioned at smoke discharging pipe finned tube inboard, so that the flow path of flue gas is close to fin and light pipe, can further strengthen heat exchange, obviously improve the shell-side fluid velocity flow profile, reduce " dead band " or " short circuit " of smoke gas flow.
The present invention further is provided with air preheater, can raise the efficiency.Among the present invention, air preheater is dexterously in conjunction with being arranged in the discharge duct of heat exchanger, when winter outdoor air reach below-20 ℃, utilize fume afterheat to improve the air themperature that enters burner hearth, further reduce exhaust gas temperature, so that efficient reaches more than 98%, have positive effect.
Description of drawings
Fig. 1 is the main body schematic diagram according to the described pressure helical fin of one embodiment of the invention coil condensation Heat supply and heat exchange device.
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 the operation principle schematic diagram in the one embodiment of the invention.
Fig. 4 is that cutaway 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 is that one embodiment of the invention Air preheater is positioned at the pressure helical fin coil condensation Heat supply and heat exchange device right side in when top and looks cutaway view.
Fig. 6 is the helical fin coil pipe tube bank schematic diagram that several helical fin coil pipe close-packed arrays of the present invention form.
Fig. 7 is the main schematic diagram of looking of helical fin coil pipe tube bank of the present invention.
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 is crossed outer deflector.
Figure 11 is the operation principle schematic diagram that flue gas is crossed interior deflector.
Figure 12 is with the right TV structure schematic diagram of the pressure helical fin coil condensation Heat supply and heat exchange device of two air preheaters among another embodiment of the present invention.
The specific embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and it only is used for explanation the present invention, and can not be interpreted as limitation of the present invention.
Such as Fig. 1 ~ shown in Figure 12, comprising: upper jellyfish pipe 1, front apron 2, housing 3, helical fin coil pipe tube bank 4, outer deflector 5, burner 6, interior 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.Such as Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, a kind of pressure helical fin coil condensation Heat supply and heat exchange device, comprise housing 3, burner 6 and the tube bank 4 of helical fin coil pipe and a plurality of close-packed arrays helical fin coil pipe 8, respectively be provided with jellyfish pipe 1 and lower jellyfish pipe 9 on one group in described housing 3 both sides, wherein the upper jellyfish pipe 1 of a side and lower jellyfish pipe 9 are communicated with, the lower jellyfish pipe 9 of opposite side is installed into the mouth of a river 14, and upper jellyfish pipe 1 is then installed delivery port 13.A plurality of helical fin coil pipe turned upside down are sticked to form one group.Be provided with helical fin coil pipe tube bank 4 around the burner 6.Burner 6 belows are provided with the smoke discharging pipe 15 that is comprised of a plurality of close-packed arrays helical fin coil pipes 8.
Described side shell two ends installed inside has front apron 2 and backboard 10, 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., have delivery port 13 and water inlet 14 on the heat exchanger shell 3.Also be provided with exhaust opening 12 on the housing 3, 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 the 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 the operation principle schematic diagram in the one embodiment of the invention.In this embodiment, this forces helical fin coil condensation Heat supply and heat exchange device, comprise housing 3, be arranged at burner 6 and a plurality of helical fin coil pipes in the housing 3, be provided with water inlet 14 on the housing 3, delivery port 13 and exhaust opening 12, burner 6 is connected with air and gas inlet device, burner 6 is positioned at housing 3 tops, be coaxially installed with helical fin coil pipe tube bank 4 around the burner 6, the arranged outside of described helical fin coil pipe tube bank 4 has outer deflector 5, should outer deflector 5 be " V " type helical form deflector, fit with the helical fin coil pipe outside that the flow-guiding mouth of the adjacent of compact arranged helical fin coil pipe and outer deflector 5 staggered mutually; Burner 6 belows are provided with the smoke discharging pipe 15 that is comprised of a plurality of close-packed arrays helical fin coil pipes 8, and smoke discharging pipe 15 is emptying by exhaust opening 12; Be provided with the air preheater 11 that includes one or more cuboid or cylindrical air intake duct in the described smoke discharging pipe 15, this air preheater 11 is air inlet pipe; Described water inlet 14 is communicated with burner 6 belows a plurality of close-packed arrays helical fin coil pipe 8, burner 6 belows a plurality of close-packed arrays helical fin coil pipe 8 is communicated with burner 6 helical fin coil pipe on every side, and the helical fin coil pipe around the burner 6 is communicated with delivery port 13.
The inboard that forms a plurality of close-packed arrays helical fin coil pipes 8 of smoke discharging pipe 15 below described burner 6 is provided with interior deflector 7, described interior deflector 7 is for having the cylindric deflector of a plurality of holes and/or seam on it, fit with the helical fin coil pipe is inboard, the adjacent of a plurality of close-packed arrays helical fin coil pipes 8 and the flow-guiding mouth of interior deflector 7 stagger mutually.
Described air preheater 11 passes smoke discharging pipe 15 and is connected with air inlet device; 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 the middle part is the air intlet 17 of air preheater 11.
As shown in Figure 4, Fig. 4 is that cutaway 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 pipes 8, and the tube bank 4 of helical fin coil pipe and a plurality of close-packed arrays helical fin coil pipe 8 parallel.Described burner 6 is coaxially installed in the helical fin coil pipe tube bank 4, and burner 6 is connected with air and gas inlet device.Burner 6 belows are provided with the smoke discharging pipe 15 that is comprised of a plurality of close-packed arrays helical fin coil pipes 8.
The present invention adopts the secondary heat exchange mode, adopts the 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 opposite, passes through first a plurality of close-packed arrays helical fin coil pipes 8, again through helical fin coil pipe tube bank 4.Air preheater 11 is arranged in the smoke discharging pipe 15, can carry out heat exchange with flue gas, and raising enters the air themperature of burner hearth and further reduces simultaneously exhaust gas temperature thus.
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, the loop of formation water heating process.
As shown in Figure 5, Fig. 5 is that one embodiment of the invention Air preheater is positioned at the pressure helical fin coil condensation Heat supply and heat exchange device right side in when top and looks cutaway view.In this embodiment, burner 6 is positioned at housing 3 bottoms, be coaxially installed with one group around the burner 6 by the helical fin coil pipe tube bank 4 of the tight circumference uniform distribution of a plurality of fin straight tubes, burner 6 tops are provided with the smoke discharging pipe 15 that is comprised of housing 3 and a plurality of close-packed arrays helical fin coil pipes 8, and smoke discharging pipe 15 is emptying by exhaust opening 12; Water inlet 14 is communicated with burner 6 tops a plurality of close-packed arrays helical fin coil pipe 8, burner 6 tops a plurality of close-packed arrays helical fin coil pipe 8 is communicated with burner 6 helical fin coil pipe on every side, and the helical fin coil pipe around the burner 6 is communicated with delivery port 13.
At this moment, adopt the counter-flow arrangement high-temperature flue gas to pass through from the bottom to top one-level sensible heat transfer and B-grade condensation heat exchange; And water (flow) direction is just in time opposite, has passed through first the B-grade condensation heat exchange, passes through the one-level sensible heat transfer again.Backwater is after the B-grade condensation heat exchange absorbs fume afterheat, enter again and absorb the high-temperature flue gas sensible heat in the one-level sensible heat transfer, air preheater 11 passes the B-grade condensation heat exchanger and flue gas carries out three grades of heat exchange, improves the air themperature that enters heat exchanger and further reduces exhaust gas temperature.
Such as Fig. 6 ~ shown in Figure 11, helical fin coil pipe tube bank 4 is sticked to form and described helical fin coil pipe is restrained 4 adjacent fins carry out bending or extrusion process by a plurality of helical fin coil pipe turned upside down, so that fin is along the axial infolding at an angle of tube bank.Certainly, also can directly carry out cutting process.Finned tube both sides infolding face 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 is crossed 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 the helical fin coil pipe outside, the flow-guiding mouth of the adjacent of compact arranged helical fin coil pipe and outer deflector 5 staggers mutually.
As shown in figure 11, Figure 11 is the operation principle schematic diagram that flue gas is crossed interior deflector, a plurality of close-packed arrays helical fin coil pipes 8 are combined into cylindric, and, described a plurality of close-packed arrays helical fin coil pipe 8 adjacent fins are carried out bending or extrusion process, so that fin is along restraining axially at an angle infolding.Certainly, also can directly carry out cutting process.The inboard of described a plurality of close-packed arrays helical fin coil pipes 8 is provided with interior deflector 7, described interior deflector 7 is for having the cylindric deflector of a plurality of holes and/or seam on it, fit with the helical fin coil pipe is inboard, the adjacent of a plurality of close-packed arrays helical fin coil pipes 8 and the flow-guiding mouth of interior deflector 7 stagger mutually.
As shown in figure 12, Figure 12 is with the right TV structure schematic diagram of the pressure helical fin coil condensation Heat supply and heat exchange device of two air preheaters among another embodiment of the present invention.Be provided with the air preheater 11 with two cuboid air intake ducts in the described smoke discharging pipe 15.
To sum up, how the present invention improves the 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 of forcing helical fin coil condensation Heat supply and heat exchange device, has strengthened the heat exchange of fume side, simultaneously whole heat exchanger volume is further reduced.
By the navigation designing of outer deflector 5 and interior deflector 7, so that the flow path of flue gas is close to finned tube, further strengthen heat exchange, obviously improve the shell-side fluid velocity flow profile, reduce " dead band " or " short circuit " phenomenon of smoke gas flow.And invention is combined in air preheater 11 in the heat exchanger dexterously, show by experiment, when winter outdoor air reach below-20 ℃, utilize fume afterheat to improve to enter the air themperature of burner hearth further to reduce simultaneously exhaust gas temperature, so that efficient reaches more than 98%.
Simultaneously, the present invention is easy to mass production to the key components and parts modularized design, reduces the production difficulty of heat exchanger, saves production cost.
It should be noted that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (10)

1. force helical fin coil condensation Heat supply and heat exchange device for one kind, comprise housing (3), be arranged at burner (6) and helical fin coil pipe in the housing (3), be provided with water inlet (14), delivery port (13) and exhaust opening (12) on the housing (3), 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) on every side, burner (6) below is provided with the smoke discharging pipe (15) that is comprised of a plurality of close-packed arrays helical fin coil pipes (8), and smoke discharging pipe (15) is emptying by exhaust opening (12);
Water inlet (14) is communicated with burner (6) a plurality of close-packed arrays helical fin coil pipes in below (8), burner (6) a plurality of close-packed arrays helical fin coil pipes in below (8) are communicated with burner (6) helical fin coil pipe on every side, and burner (6) helical fin coil pipe on every side is communicated with delivery port (13).
2. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 1, it is characterized in that: bending or extrusion process are carried out in described helical fin coil pipe tube bank (4) and the adjacent fin of described a plurality of close-packed arrays helical fin coil pipes (8), helical fin coil pipe both sides fin is infolding at an angle, and formed two the infolding faces of finned tube are parallel or present certain angle.
3. 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 pipes (8) all are sticked to form by a plurality of helical fin coil pipe turned upside down.
4. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 1 is characterized in that: the arranged outside of described helical fin coil pipe tube bank (4) has outer deflector (5).
5. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 4, it is characterized in that: described outer deflector (5) is " V " type helical form deflector, fit with the helical fin coil pipe outside, the flow-guiding mouth of the adjacent of compact arranged helical fin coil pipe and outer deflector (5) staggers mutually.
6. the described pressure helical fin of arbitrary claim coil condensation Heat supply and heat exchange device in 5 according to claim 1, it is characterized in that: the inboard that described burner (6) below forms a plurality of close-packed arrays helical fin coil pipes (8) of smoke discharging pipe (15) is provided with interior deflector (7).
7. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 6, it is characterized in that: described interior deflector (7) is for having the cylindric deflector of a plurality of holes and/or seam on it, fit with the helical fin coil pipe is inboard, the flow-guiding mouth of the adjacent of a plurality of close-packed arrays helical fin coil pipes (8) and interior deflector (7) staggers mutually.
8. 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 the described smoke discharging pipe (15); Described air preheater (11) passes smoke discharging pipe (15) and is connected with air inlet device; Described exhaust opening (12) is the tubing type exhaust opening, and its upper end is exhaust opening (12), and its lower end is condensation-water drain (16), and the middle part is the air intlet (17) of air preheater (11).
9. pressure helical fin coil condensation Heat supply and heat exchange device according to claim 8 is characterized in that: the air preheater (11) in the described smoke discharging pipe (15) is one or more cuboid or cylindrical air intake duct.
10. 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) on every side, burner (6) top is provided with the smoke discharging pipe (15) that is comprised of housing (3) and a plurality of close-packed arrays helical fin coil pipes (8), and smoke discharging pipe (15) is emptying by exhaust opening (12); Water inlet (14) is communicated with burner (6) a plurality of close-packed arrays helical fin coil pipes in top (8), burner (6) a plurality of close-packed arrays helical fin coil pipes in top (8) are communicated with burner (6) helical fin coil pipe on every side, and burner (6) helical fin coil pipe on every side is 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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Address after: 215000 Building D, No.128 Xingpu Road, Suzhou Industrial Park, Suzhou City, Jiangsu Province

Patentee after: Suzhou CQ Heat Exchanger Co.,Ltd.

Address before: 215021, Suzhou Industrial Park, Jiangsu Province, only 9 new road, only ting industrial square A District No. 1

Patentee before: Suzhou CQ Heat Exchanger Co.,Ltd.