CN105486142A - Oval finned tube type heat exchanger and oval finned tube type intelligent phase-change heat exchange device - Google Patents
Oval finned tube type heat exchanger and oval finned tube type intelligent phase-change heat exchange device Download PDFInfo
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- CN105486142A CN105486142A CN201510920975.0A CN201510920975A CN105486142A CN 105486142 A CN105486142 A CN 105486142A CN 201510920975 A CN201510920975 A CN 201510920975A CN 105486142 A CN105486142 A CN 105486142A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/026—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat with different heat storage materials not coming into direct contact
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides an oval finned tube type heat exchanger. The oval finned tube type heat exchanger comprises a plurality of tube bundle upper communicating tubes, a plurality of tube bundle lower communicating tubes, a plurality of rows of finned tube bundles, a heat exchanger upper water collecting tube and a heat exchanger lower water collecting tube, wherein the rows of finned tube bundles are parallel to one another and are sequentially arranged at intervals; one ends of the finned tube bundles communicate with the tube bundle upper communicating tubes in a one-to-one correspondence manner; the other ends of the finned tube bundles communicate with the tube bundle lower communicating tubes in a one-to-one correspondence manner; the tube bundle upper communicating tubes further communicate with the heat exchanger upper water collecting tube; the tube bundle lower communicating tubes further communicate with the heat exchanger lower water collecting tube; an inlet of the heat exchanger upper water collecting tube communicates with a liquid cold working medium feeding pipe; an outlet of the heat exchanger lower water collecting tube communicates with a liquid cold working medium discharging pipe; and cross sections of finned tubes in each row of finned tube bundles are oval. The invention further provides an oval finned tube type intelligent phase-change heat exchange device. By the oval finned tube type heat exchanger and the oval finned tube type intelligent phase-change heat exchange device, accumulated ash of the finned tubes is reduced, meanwhile, the heat exchange effect is further improved, and heat exchange efficiency is improved.
Description
Technical field
The invention belongs to field of energy-saving technology, particularly a kind of elliptical fin tubular type heat exchanger and elliptical fin tubular type intelligence phase change heat exchange device.
Background technology
In the flue of boiler tail, be generally all provided with fin-tube heat exchanger, for absorbing fume afterheat.Because the contaminant tack produced after fuel combustion is large, in addition the finned tube of fin-tube heat exchanger of the prior art is Round fin pipe, its section is circular, therefore after flue gas flows through fin-tube heat exchanger, easily in the triangle dust stratification district, rear portion of Round fin pipe, thus affect the heat exchange efficiency of finned tube.
Summary of the invention
In order to solve the problem, one aspect of the present invention provides a kind of elliptical fin tubular type heat exchanger, and it comprises: many tube bank upper communicating pipes, many restrain lower communicating tube, to arrange on finned-tube bundle, heat exchanger collector pipe under collector pipe and heat exchanger more; The described finned-tube bundle of many rows to be parallel to each other and to stay spaced mode to arrange successively, one end with in many described tube banks communicating pipe one_to_one corresponding be communicated with, the other end is communicated with many described tube bank lower communicating tube one_to_one corresponding; In many described tube banks, communicating pipe is also communicated with collector pipe on described heat exchanger; Many described tube bank lower communicating tubes also with described heat exchanger next part cross current; The import of collector pipe and the pipeline communication of the liquid cold working medium of input on described heat exchanger, the outlet of collector pipe and the pipeline communication of the cold working medium of the described liquid state of output under described heat exchanger; Wherein, often arrange in described finned-tube bundle and contain to be parallel to each other and to stay the many finned tubes that spaced mode shape is in a row, one end of many described finned tubes is as the one end of often arranging described finned-tube bundle, the other end of many described finned tubes is as the other end often arranging described finned-tube bundle, and the section of described finned tube is oval.
In elliptical fin tubular type heat exchanger as above, preferably, the described finned-tube bundle of many rows is divided into odd number to arrange finned-tube bundle and even rows finned-tube bundle; The often often row finned-tube bundle arranged in finned-tube bundle and described even rows finned-tube bundle in described odd number row finned-tube bundle is that wrong row is arranged.
In elliptical fin tubular type heat exchanger as above, preferably, the major semiaxis of described ellipse and the ratio of semi-minor axis are more than or equal to 1.4.
In elliptical fin tubular type heat exchanger as above, preferably, the cold working medium of described liquid state is water.
The present invention provides a kind of elliptical fin tubular type intelligence phase change heat exchange device on the other hand, and it comprises: endotherm section, tedge, heat release section, down-comer and flow regulator; Described endotherm section is installed in the flue of boiler tail, and the cold working medium of the liquid state in described endotherm section becomes gaseous state hot working fluid after absorbing the heat of the flue gas entered in described endotherm section; Described tedge is communicated with the working medium side outlet of described endotherm section and the working medium side entrance of described heat release section, and the gaseous state hot working fluid in described endotherm section is delivered to described heat release section; Described heat release section is installed on outside described flue, liquid cold working medium is become after gaseous state hot working fluid in described heat release section and the low-temperature receiver heat exchange entered in described heat release section, become thermal source after gaseous state hot working fluid heat exchange in low-temperature receiver in described heat release section and described heat release section, wherein said low-temperature receiver comprises air; Described down-comer is communicated with the working medium side outlet of described heat release section and the working medium side entrance of described endotherm section, and cold for the liquid state in described heat release section working medium is delivered to described endotherm section; Described flow regulator is installed on described down-comer, and to regulate liquid cooling working medium in described down-comer to enter the inflow of described endotherm section, thus the heating surface wall surface temperature controlling described endotherm section is on boiler oil acid dew-point temperature; Wherein, described endotherm section is above-mentioned elliptical fin tubular type heat exchanger, and the flow direction along flue gas is arranged described finned-tube bundle more and arranged successively.
In elliptical fin tubular type intelligence phase change heat exchange device as above, preferably, the cold working medium of described liquid state is water, and described gaseous state hot working fluid is steam.
In elliptical fin tubular type intelligence phase change heat exchange device as above, preferably, described low-temperature receiver is air.
In elliptical fin tubular type intelligence phase change heat exchange device as above, preferably, described flow regulator comprises the first control valve and wall surface temperature tester; Described first control valve is installed on described down-comer, and described wall surface temperature tester is for measuring the heating surface wall surface temperature of described endotherm section.
In elliptical fin tubular type intelligence phase change heat exchange device as above, preferably, described flow regulator also comprises: controller; Described controller is connected with described first control valve and described wall surface temperature tester, controls described first control valve according to the heating surface wall surface temperature that the combustion gas acid dew-point temperature preset and described wall surface temperature tester record.
In elliptical fin tubular type intelligence phase change heat exchange device as above, preferably, the flue of described boiler tail is the flue of boiler tail.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By the section of finned tube is arranged to ellipse, the dust stratification of finned tube is reduced, further improves heat transfer effect simultaneously, improve heat exchange efficiency.
Accompanying drawing explanation
The plan structure schematic diagram of a kind of elliptical fin tubular type heat exchanger that Fig. 1 provides for the embodiment of the present invention;
A kind of elliptical fin tubular type heat exchanger that Fig. 2 provides for the embodiment of the present invention look up structural representation;
A kind of row's finned-tube bundle that Fig. 3 provides for the embodiment of the present invention and one restrain the connection diagram that upper communicating pipe and restrain lower communicating tube;
The structural representation of a kind of elliptical fin tubular type intelligence phase change heat exchange device that Fig. 4 provides for the embodiment of the present invention;
Wherein, in figure, symbol description is as follows:
1 tube bank upper communicating pipe, 2 tube bank lower communicating tubes, 3 finned-tube bundles, 31 odd numbers arrange finned-tube bundles, 32 even rows finned-tube bundles, 33 finned tubes, collector pipe, 6 endotherm sections, 7 tedges, 8 heat release section, 9 down-comers, 100 control valves, 101 wall surface temperature testers, 102 controllers under collector pipe, 5 heat exchangers on 4 heat exchangers.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
See Fig. 1 ~ 3, one embodiment of the invention provides a kind of elliptical fin tubular type heat exchanger, and it comprises: many tube bank upper communicating pipes 1, many tube bank lower communicating tubes 2, to arrange on finned-tube bundle 3, heat exchanger collector pipe 5 under collector pipe 4 and heat exchanger more.Elliptical fin tubular type heat exchanger is arranged in the flue of boiler tail.
Wherein, many row's finned-tube bundles 3 are to be parallel to each other and to stay spaced mode to arrange successively, and the one end of often arranging finned-tube bundle 3 is restrained upper communicating pipe one_to_one corresponding be communicated with many, and often the other end of row's finned-tube bundle 3 is restrained lower communicating tube one_to_one corresponding be communicated with many.Often arrange finned-tube bundle 3 containing many finned tubes 33, every root finned tube 33 comprises body and is formed at the fin of tube wall, see Fig. 3, many finned tubes 33 are to be parallel to each other and to stay spaced mode to arrange with shape finned-tube bundle 3 in a row successively each other, one end of many finned tubes 33 is as the one end of often arranging finned-tube bundle 3, and the other end of many finned tubes 33 is as the other end often arranging finned-tube bundle 3.The section of finned tube 33 is oval, and namely finned tube is elliptical finned tube, and the body of finned tube is oval body.Many tube banks were also communicated with collector pipe on heat exchanger 4 upper communicating pipe 1, and many tube bank lower communicating tubes 2 are also communicated with collector pipe under heat exchanger 5.The import of collector pipe 4 and the pipeline communication of the liquid cold working medium of input on heat exchanger, the outlet of collector pipe 5 and the pipeline communication of the cold working medium of dispensing liquid under heat exchanger.Liquid cold working medium is water.In order to resist the spot corrosion of sulfur-containing smoke gas condensation, the material of finned tube is 09CrCuSb steel.Finned tube is preferably high-frequency resistance welding (HFRW) spiral fin coil.Because eddy current in elliptical finned tube Disengagement zone reduces, lee face dust stratification is reduced.In the grey occasion of height, circular finned tube lee face dust stratification is serious, and the grey taper even produced becomes to put up a bridge, and elliptical finned tube not easily produces the bridging become by grey taper, thus elliptical finned tube dust stratification is reduced.
Meanwhile, elliptical finned tube is circular finned tube comparatively, also has following obviously advantage: 1) heat transfer effect improves.For same circumference, because elliptical finned tube actual internal area is less than circular finned tube, if flow is constant, disturbance is strengthened, and in pipe, heat convection is strengthened.For the outer situation of pipe, from point of flow separation position and Development of Boundary Layer, Average heat transfer effect outside elliptical finned tube is always better than circular finned tube, because ellipse is similar to streamlined, when plunderring outside fluid, resistance is less, allowing can improve flow velocity under identical flow resistance, thus external heat transfer also can be strengthened.2) elliptical tube flows outside characteristic is good.When fluid is plunderred along transverse direction is horizontal, move after relative elliptical finned tube burble point, the flow losses caused due to Karman vortex street in Disengagement zone undoubtedly can reduce greatly.3) heat exchanger structure is compact, and namely under identical circulation area, elliptical finned tube heat transfer perimeter is long, and heat exchange area is corresponding increase also, structure also allows arrange compacter, and the heat exchange amount of unit volume is increased.Based on this, elliptical finned tube ratio of heat transfer coefficient circular finned tube is high by 15%, and its resistance ratios circular finned tube is low by 18%.To specific heat exchange amount, compared with the elliptical fin tubular type heat exchanger formed by circular finned tube, the heat exchange area needed for ellipse tube type heat exchanger (the elliptical fin tubular type heat exchanger namely formed by elliptical finned tube) is less, and consumed power is also less.
In order to reduce the dust stratification amount of elliptical finned tube further, oval major semiaxis and the ratio of semi-minor axis are more than or equal to 1.4.During through using, being more than or equal to 1.4, the lee face of elliptical tube can not produce ash cone substantially.
See Fig. 1 ~ 2, in order to increase the effective contact area with flue gas, many rows finned-tube bundle is divided into odd number to arrange finned-tube bundle 31 and even rows finned-tube bundle 32, along flue gas flow direction, number with natural number for often arranging fin finned-tube bundle, start from 1, be numbered 1,3 ..., (2n+1) all finned-tube bundles row be called odd number row finned-tube bundle, start from 2, be numbered 2,4 ..., (2n+2) all finned-tube bundles row form odd numbers row finned-tube bundles and be called even rows finned-tube bundle, wherein, n is positive integer.The often often row finned-tube bundle arranged in finned-tube bundle and even rows finned-tube bundle 32 in odd number row finned-tube bundle 31 is that wrong row is arranged.
Many tube banks were divided into connection group on first to be communicated with group with on second upper communicating pipe 1, every root tube bank upper communicating pipe 1 of connection group and collector pipe 4 Flange joint on heat exchanger on first, on second, connection group was welded to connect with collector pipe 4 on heat exchanger every root tube bank upper communicating pipe 1.Many tube bank lower communicating tubes 2 are divided into first time connection group to be communicated with group with second time, every root tube bank lower communicating tube 2 and collector pipe 5 Flange joint under heat exchanger of first time connection group, every root tube bank lower communicating tube 2 of second time connection group is welded to connect with collector pipe 5 under heat exchanger.Many rows finned-tube bundle 3 is to be parallel to each other and to stay spaced mode to arrange successively, many rows finned-tube bundle 3 is divided into the first fins set and the second fins set along arranged direction, often organize and at least comprise row's finned-tube bundle, one end of often arranging finned-tube bundle of first fins set be communicated with group on first and be communicated with, the other end often arranging finned-tube bundle of the first fins set is communicated with group with first time and is communicated with, one end of often arranging finned-tube bundle of second fins set be communicated with group on second and be communicated with, the other end often arranging finned-tube bundle of the second fins set is communicated with group with second time and is communicated with.Often arrange finned-tube bundle 3 containing many finned tubes 33, many finned tubes 33 are to be parallel to each other and to stay spaced mode to arrange successively each other, one end of many finned tubes 33 is as the one end of often arranging finned-tube bundle, and the other end of many finned tubes 33 is as the other end often arranging finned-tube bundle.
Finned-tube bundle heat exchanger is when applying, first fins set position is forward, very easily prior to wearing and tearing or the leakage of the second fins set generation tube wall, thus cause the heat exchange of finned-tube bundle heat exchanger to be lost efficacy, exhaust gas temperature raises, cause energy waste, therefore by connection group on be communicated with the first fins set first is communicated with first time group accordingly with collector pipe 5 Flange joint under collector pipe on heat exchanger 4 and heat exchanger, collector pipe 4 on connection group on be communicated with the second fins set second and heat exchanger is welded to connect, collector pipe 4 under the second time connection group be communicated with the second fins set and heat exchanger is welded to connect, make by the first fins set, on first, connection group is communicated with the connected mode of collector pipe 5 under collector pipe 4 and heat exchanger on the heat exchange unit of group composition and heat exchanger with first time is the mode of removably connecting, relative to by arranging finned-tube bundle more, many tube bank upper communicating pipes and Duo Gen restrain the overall heat exchange unit that lower communicating tube is formed by welding, when there are wearing and tearing or leak in tube wall, change efficient and convenient, save maintenance cost, and avoid energy waste.When applying, very easily there are wearing and tearing or reveal in the tube wall in first three row's finned-tube bundle, therefore connection group contains three tube bank upper communicating pipes 1 on first, first time connection group contains three tube bank lower communicating tubes 2, first fins set contains three row's finned-tube bundles 3, often arranges finned-tube bundle 3 and restrains upper communicating pipe 1 restrain lower communicating tube 2 and be communicated with one with one.See Fig. 4, another embodiment of the present invention additionally provides a kind of elliptical fin tubular type intelligence phase change heat exchange device, and it comprises: endotherm section 6, tedge 7, heat release section 8, down-comer 9 and flow regulator.
Wherein, endotherm section 6 (or being called phase-change heat-exchanger hypomere) is installed in the flue of boiler tail, for absorbing the heat of the flue gas flowing through endotherm section 6 to heat the cold working medium of liquid state in it, becomes gaseous state hot working fluid after liquid cold working medium heat absorption.Flue gas enters from the fume side entrance of endotherm section 6, in endotherm section 6 after heat release, is exported discharge by fume side; Liquid cold working medium is entered by the working medium side entrance of endotherm section 6, in endotherm section 6 after heat absorption, is exported and discharges, namely complete endothermic process by the working medium side of endotherm section 6.Because specific heat of water holds large, and in order to reduce costs, liquid cold working medium is preferably water, and gaseous state hot working fluid is steam accordingly.The flue of boiler tail can for often subtracting the flue of stove afterbody.Endotherm section is aforesaid elliptical fin tubular type heat exchanger, and it comprises: many tube bank upper communicating pipes 1, many tube bank lower communicating tubes 2, to arrange on finned-tube bundle 3, heat exchanger collector pipe 5 under collector pipe 4 and heat exchanger more; Many rows finned-tube bundle 3 is arranged successively along the flow direction of flue gas, often arranges the cross section of every root finned tube of finned-tube bundle for oval.。
Tedge 7 is communicated with the working medium side outlet of endotherm section 6 and the working medium side entrance of heat release section 8, and the gaseous state hot working fluid in endotherm section 6 is delivered to heat release section 8.Becoming in the cold working medium of liquid state the heat energy produced in the process of gaseous state hot working fluid can make gaseous state hot working fluid enter in heat release section 8 through tedge 7, and without the need to extraneous driving force, improves energy utilization rate.
Heat release section 8 (or being called phase-change heat-exchanger epimere) is installed on outside flue, heat for discharging into the gaseous state hot working fluid in heat release section 8 heats the low-temperature receiver entered in it, liquid cold working medium is become after the heat exchange of gaseous state hot working fluid, thermal source is become after low-temperature receiver and the heat exchange of gaseous state hot working fluid, wherein low-temperature receiver is air, accordingly, thermal source is also air, and the temperature of thermal source is higher than the temperature of low-temperature receiver.Gaseous state hot working fluid enters from the working medium side entrance of heat release section 8, in heat release section 8 after heat release, becomes liquid cold working medium, is then exported by working medium side and discharges; Low-temperature receiver is entered by the air side entrance of heat release section 8, in heat release section 8 after heat absorption, become thermal source, then exported by the air side of heat release section 8 and discharge, namely complete exothermic process, thermal source can enter air preheater after discharging and heat, and this air preheater is installed in boiler, and its installation site is relative to the installation site of endotherm section 6, be in the upstream of flue gas.
One end of down-comer 9 and the working medium side outlet of heat release section 8, the other end of down-comer 9 is communicated with the working medium side entrance of endotherm section 6, and cold for the liquid state in heat release section 8 working medium is delivered to endotherm section 6.After gaseous state hot working fluid becomes liquid cold working medium, rely on the gravity of liquid cold working medium, enter endotherm section 6 through down-comer 9, and without the need to extraneous driving force, improve energy utilization rate.In other words, heat absorption and release process, without the need to extraneous driving force, relies on the heat energy and the gravity of self formation Natural Circulation that produce.
Flow regulator is installed on down-comer 9, the inflow of endotherm section 6 is entered for regulating liquid cooling working medium in down-comer 9, to realize the internal circulating load heightening or turn down liquid cold working medium, and then regulate liquid cold working medium in endotherm section 6 with the heat exchange amount of flue gas, thus control the heating surface wall surface temperature of endotherm section 6, make heating surface wall surface temperature on fuel acids dew-point temperature, such as, control heating surface wall surface temperature and exceed 10 ° than the temperature of fuel acids dew point.By the control of flow regulator, the cooldown rate of heat release section 8 and the heat absorption rate of endotherm section 6 can be made to balance, and saturated vapor and saturation water Natural Circulation reach balance, and heating surface wall surface temperature (or claiming wall temperature) is invariable.
Flow regulator comprises control valve 100 and wall surface temperature tester 101.Control valve 100 is installed on down-comer 9, enters the inflow of endotherm section 6 for regulating liquid cooling working medium in down-comer 9.Wall surface temperature tester 101 is for measuring the heating surface wall surface temperature of endotherm section 6, and during application, it can be installed on the heating surface of endotherm section 6, directly measures heating surface wall surface temperature; In order to realize measuring simply, can be arranged on tedge 7, indirect inspection heating surface wall surface temperature, measuring heating surface wall surface temperature by the temperature measuring steam.
In order to realize automation, flow regulator also comprises: controller 102, it is connected with control valve 100 and wall surface temperature tester 101, according to the heating surface wall surface temperature that the combustion gas acid dew-point temperature preset and wall surface temperature tester 101 record, control valve 100 is controlled, to heighten or to turn down the internal circulating load of liquid cold working medium, and then the heat exchange amount of adjustment in endotherm section 6, thus heighten or turn down the heating surface wall surface temperature of endotherm section 6.Particularly, the preset value of heating surface wall surface temperature is set to higher than combustion gas acid dew-point temperature value, such as high 10 °, the heating surface wall surface temperature recorded by wall surface temperature tester 101 compares with preset value, if be greater than preset value, then increases the aperture of control valve 100, if be less than preset value, then reduce the aperture of control valve 100, thus make heating surface wall surface temperature be stabilized in preset value, keep heating surface wall surface temperature (or claiming wall temperature) invariable.
In order to reduce the exhaust gas temperature of stove further, energy-saving benefit is maximized, and low-temperature receiver also comprises: demineralized water, and elliptical fin tubular type intelligence phase change heat exchange device also comprises demineralized water heat exchanging segment; Gaseous state hot working fluid in absorber portion 6 is after flowing through heat release section 8, enter demineralized water heat exchanging segment and carry out heat exchange with the demineralized water entered in demineralized water heat exchanging segment, the cold working medium of liquid state after heat exchange flows into down-comer 9, so can improve flue gas waste heat recovery efficiency further and make endotherm section heating surface safety, economical operation.The cold working medium of liquid state in demineralized water heat exchanging segment can enter in heat release section 8 by the liquid refrigerant side entrance of heat release section 8 through pipeline, is expelled in down-comer 4 by with the liquid refrigerant side outlet in heat release section 8.Demineralized water heat exchanging segment is preferably U-tube heat exchanger.The conveying demineralized water pipeline be communicated with the demineralized water entrance of demineralized water heat exchanging segment is provided with control valve, and it is for regulating the flow of demineralized water, and then regulates the heat exchange amount in demineralized water heat exchanging segment, thus it is invariable to be beneficial to control heating surface wall surface temperature.This control valve is connected with controller 8, is easy to the automation realizing controlling.
In sum, the beneficial effect of embodiment provided by the invention is as follows:
By the section of finned-tube bundle is arranged to ellipse, the dust stratification of elliptical finned tube is reduced, further improves heat transfer effect simultaneously, improve heat exchange efficiency.
As known by the technical knowledge, the present invention can be realized by other the embodiment not departing from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, all just illustrates, is not only.Within the scope of the present invention all or be all included in the invention being equal to the change in scope of the present invention.
Claims (9)
1. an elliptical fin tubular type heat exchanger, is characterized in that, described elliptical fin tubular type heat exchanger comprises: many tube bank upper communicating pipes, many restrain lower communicating tube, to arrange on finned-tube bundle, heat exchanger collector pipe under collector pipe and heat exchanger more;
The described finned-tube bundle of many rows to be parallel to each other and to stay spaced mode to arrange successively, one end with in many described tube banks communicating pipe one_to_one corresponding be communicated with, the other end is communicated with many described tube bank lower communicating tube one_to_one corresponding;
In many described tube banks, communicating pipe is also communicated with collector pipe on described heat exchanger;
Many described tube bank lower communicating tubes also with described heat exchanger next part cross current;
The import of collector pipe and the pipeline communication of the liquid cold working medium of input on described heat exchanger, the outlet of collector pipe and the pipeline communication of the cold working medium of the described liquid state of output under described heat exchanger;
Wherein, often arrange in described finned-tube bundle and contain to be parallel to each other and to stay the many finned tubes that spaced mode shape is in a row, one end of many described finned tubes is as the one end of often arranging described finned-tube bundle, the other end of many described finned tubes is as the other end often arranging described finned-tube bundle, and the section of described finned tube is oval.
2. elliptical fin tubular type heat exchanger according to claim 1, is characterized in that, the described finned-tube bundle of many rows is divided into odd number to arrange finned-tube bundle and even rows finned-tube bundle;
The often often row finned-tube bundle arranged in finned-tube bundle and described even rows finned-tube bundle in described odd number row finned-tube bundle is that wrong row is arranged.
3. elliptical fin tubular type heat exchanger according to claim 1, is characterized in that, the major semiaxis of described ellipse and the ratio of semi-minor axis are more than or equal to 1.4.
4. elliptical fin tubular type heat exchanger according to claim 1, is characterized in that, the cold working medium of described liquid state is water.
5. an elliptical fin tubular type intelligence phase change heat exchange device, is characterized in that, described elliptical fin tubular type intelligence phase change heat exchange device comprises: endotherm section, tedge, heat release section, down-comer and flow regulator;
Described endotherm section is installed in the flue of boiler tail, and the cold working medium of the liquid state in described endotherm section becomes gaseous state hot working fluid after absorbing the heat of the flue gas entered in described endotherm section;
Described tedge is communicated with the working medium side outlet of described endotherm section and the working medium side entrance of described heat release section, and the gaseous state hot working fluid in described endotherm section is delivered to described heat release section;
Described heat release section is installed on outside described flue, liquid cold working medium is become after gaseous state hot working fluid in described heat release section and the low-temperature receiver heat exchange entered in described heat release section, become thermal source after gaseous state hot working fluid heat exchange in low-temperature receiver in described heat release section and described heat release section, wherein said low-temperature receiver comprises air;
Described down-comer is communicated with the working medium side outlet of described heat release section and the working medium side entrance of described endotherm section, and cold for the liquid state in described heat release section working medium is delivered to described endotherm section;
Described flow regulator is installed on described down-comer, and to regulate liquid cooling working medium in described down-comer to enter the inflow of described endotherm section, thus the heating surface wall surface temperature controlling described endotherm section is on boiler oil acid dew-point temperature;
Wherein, the elliptical fin tubular type heat exchanger of described endotherm section according to any one of claims 1 to 3, the flow direction along flue gas is arranged described finned-tube bundle more and is arranged successively.
6. elliptical fin tubular type intelligence phase change heat exchange device according to claim 5, it is characterized in that, the cold working medium of described liquid state is water, and described gaseous state hot working fluid is steam.
7. elliptical fin tubular type intelligence phase change heat exchange device according to claim 5, it is characterized in that, described low-temperature receiver is air.
8. elliptical fin tubular type intelligence phase change heat exchange device according to claim 5, it is characterized in that, described flow regulator comprises the first control valve and wall surface temperature tester;
Described first control valve is installed on described down-comer, and described wall surface temperature tester is for measuring the heating surface wall surface temperature of described endotherm section.
9. elliptical fin tubular type intelligence phase change heat exchange device according to claim 5, it is characterized in that, described flow regulator also comprises: controller;
Described controller is connected with described first control valve and described wall surface temperature tester, controls described first control valve according to the heating surface wall surface temperature that the combustion gas acid dew-point temperature preset and described wall surface temperature tester record.
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| CN201510920975.0A CN105486142B (en) | 2015-12-11 | 2015-12-11 | Elliptical fin tubular type heat exchanger and elliptical fin tubular type intelligence phase change heat exchange device |
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| CN201510920975.0A CN105486142B (en) | 2015-12-11 | 2015-12-11 | Elliptical fin tubular type heat exchanger and elliptical fin tubular type intelligence phase change heat exchange device |
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| CN105486142B CN105486142B (en) | 2018-04-10 |
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Citations (7)
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