CN1800768A - Anti-corrosion copper condensing heat exchanger utilizing smoke heat energy, and manufacturing method thereof - Google Patents
Anti-corrosion copper condensing heat exchanger utilizing smoke heat energy, and manufacturing method thereof Download PDFInfo
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- CN1800768A CN1800768A CN 200610002176 CN200610002176A CN1800768A CN 1800768 A CN1800768 A CN 1800768A CN 200610002176 CN200610002176 CN 200610002176 CN 200610002176 A CN200610002176 A CN 200610002176A CN 1800768 A CN1800768 A CN 1800768A
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- heat exchanger
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- gilled tube
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Abstract
The invention relates to a copper antisepsis condensation heat exchanger with smoke heat energy and relative producing method, belonging to the metal antisepsis and condensation heat exchange strengthen technique. the invention is a rib pipe heat exchanger with white copper or red copper as basic material; the outer surface of rib pipe and the surface of rib are plated with non-crystal nickel-copper-phosphor chemical composite film with the sodium molybdate as stabilizer; the rib shape can apply the guide of condensation liquid, while its added groove can strengthen the guide function; the producing method utilizes first-plating after-expansion last-plating method to improve the corrosion resistance and heat transmission property. The invention has the advantages of copper heat exchanger as better heat transmission property, tight structure and easy producing, which also solve the problems of condensation fuel water heater and condensation fuel heat-collection heater as corrosion resistance and strengthening heat transmission.
Description
Technical field
The present invention relates to the employed condensing heat exchangers of condensing gas utilization equipment such as a kind of condensed type combustion gas water heater or condensed type combustion gas heating hot water stove, be particularly related to a kind of anti-corrosion copper condensing heat exchanger and manufacture method thereof of utilizing flue gas heat energy, belong to anti-corrosion of metal and condensing heat-exchange reinforcement technique field.
Background technology
Present gas heater and the gas-heating water heater gas utilization equipment such as (comprising single heating type and heating and hot water two purpose type) that uses, its basic principle is to utilize copper finned tube heat exchanger that the heat of combustion of natural gas product one flue gas is passed to water, with supply domestic hot-water and heating heat.This series products corrodes exhaust gas temperature all more than 100 ℃ for avoiding, and its heat exchanger only utilizes the sensible heat of flue gas, and vapour latent heat fails to utilize in the flue gas, with fume emission in atmosphere, so its thermal efficiency between 80～88%, and has certain pollution to environment.
For improving this series products thermal efficiency; energy savings and protection environment; over nearly 30 years, all at research condensed type combustion gas water heater and condensed type combustion gas heating hot water stove, be intended to both at home and abroad by utilizing condensing heat exchanger that exhaust gas temperature is reduced to below the flue gas dew point temperature; recycle the heat energy in the smoke evacuation to greatest extent; comprise sensible heat and the latent heat that makes water vapour condensation in the flue gas in the smoke evacuation, gross efficiency can improve 10～20%, wherein; in theory, the recycle-water steam latent heat can improve the thermal efficiency 11%.Water vapor condensate also can dissolve and absorb CO in the smoke evacuation
X, NO
X, SO
XEtc. the part pernicious gas, flue gas there is certain catharsis.
Because water recovery liquid dissolved part pernicious gas in the flue gas, form the more highly acid corrosive liquid that has that contains nitrate anion, nitrite anions, chlorate anions, sulfate ion, can cause corrosion by the heat exchanging device, influence its service life.Simultaneously, also claimed structure compactness, volume are little, in light weight for condensed type combustion gas water heater and condensed type combustion gas heating hot water stove.Thereby the key problem in technology that becomes exploitation condensed type combustion gas water heater and condensed type combustion gas heating hot water stove is strengthened in the anticorrosion and heat exchange of condensing heat exchanger.
At present, the condensing heat exchanger of developed country mainly adopts as cast aluminium, aluminium alloy, nickel alloy, stainless steel and teflon materials such as (Teflon) as the heat exchange material.This type of heat exchanger is the price height not only, processing difficulties, and equipment volume and weight are big.
Copper has good thermal conductivity and ductility, make the high fin heat exchanger of inned coefficient easily, make facility compact, in light weight, volume is little, by on-condensing gas heater and the extensive use of heating hot water stove, but because the heat exchanger of traditional on-condensing equipment, usually adopt red copper or brass, its corrosion-resistant is not suitable for directly as condensing heat exchanger.
Summary of the invention
The purpose of this invention is to provide a kind of anti-corrosion copper condensing heat exchanger and manufacture method thereof of utilizing flue gas heat energy, the latent heat that condenses and discharge with sensible heat steam in flue gas of recycling in the smoke evacuation of gas utilization equipment, enhanced heat exchange, further improve the heat energy utilization rate and the decay resistance of gas utilization equipment, reduce and pollute.
Technical scheme of the present invention is as follows:
A kind of anti-corrosion copper condensing heat exchanger that utilizes flue gas heat energy, comprise copper gilled tube and be arranged on copper fin on this gilled tube, it is characterized in that: all being coated with the sodium molybdate on described gilled tube outer surface and fin surface is the amorphous ni-cu-p chemical composite plating of stabilizing agent.
The upper and lower edge of fin described in the present invention adopts circular arc or top edge to adopt trapezoidal shape polygon, lower limb to adopt the inverted triangle shape polygon to the condensation water water conservancy diversion.
Technical characterictic of the present invention also is: for described lower limb is the circular arc fin, and its underpart is provided with condensation water water conservancy diversion conduit.
Anti-corrosion copper condensing heat exchanger provided by the present invention is to be base material with copper-nickel alloy or red copper, and its gilled tube adopts pipe, elliptical tube or sub-elliptical pipe.
The present invention also provides a kind of described manufacture method of utilizing the anti-corrosion copper condensing heat exchanger of flue gas heat energy, it is characterized in that this method carries out as follows:
1) with the copper material is base material, respectively processing and fabricating fin and gilled tube;
2) Ni-P is for the first time carried out on gilled tube outer surface and fin surface: in normal pressure, temperature is that to carry out under 80～90 ℃ with the sodium molybdate be the amorphous ni-cu-p Ni-P of stabilizing agent, and the component of plating bath and content are:
NiSO
4·7H
2O： 40～57g/L
NaH
2PO
4·H
2O：?20～30g/L
Natrium citricum: 35～45g/L,
CuSO
4·5H
2O： 0.5～1.5g/L，
NH
4Ac： 30～40g/L
NH
4F： 1～2g/L
Na
2MoO
4·2H
2O：?1～5mg/L；
The pH value of above-mentioned plating bath is 7～9;
3) will plate good gilled tube and fin expanded joint, then with the identical condition of the chemical plating first time under condensing heat exchanger integral body is carried out chemical plating second time, promptly make the anticorrosion condensing heat exchanger that has chemically composited layer of amorphous ni-cu-p.
In above-mentioned manufacture method, the preferred ingredient content of described plating bath is:
NiSO
4·7H
2O： 43g/L
NaH
2PO
4·H
2O：?25g/L
Natrium citricum: 40g/L
CuSO
4·5H
2O： 1g/L
NH
4Ac： 35g/L
NH
4F： 1g/L
Na
2MoO
4·2H
2O：1mg/L；
The PH of plating bath is preferably 8, and bath temperature is preferably 88 ℃.
The present invention compared with prior art, have the following advantages and the high-lighting effect: condensing heat exchanger 1. provided by the present invention is a base material with red copper or copper-nickel alloy, not only brought into play copper heat exchanger good heat transfer performance, compact conformation, the outstanding advantage that is easy to shape etc., and owing to the present invention has adopted special anti-corrosive film coating and added fabrication technique, promptly adopting with the sodium molybdate is the chemically composited plated film of amorphous ni-cu-p of stabilizing agent, be coated with one deck character on the surface of copper gilled tube and fin good, fine and close, evenly, smooth, particularly to the corrosion resistant plated film of flue gas condensing liquid (being also referred to as coating), and adopt and plate earlier the depositing process again that afterwards expands, can not only effectively improve its decay resistance, improve the service life of condensing heat exchanger, also obviously strengthened its heat transfer property simultaneously.2. the fin form that adopt to be fit to the enforcing condensation heat exchange is guaranteeing that heat-transfer surface requires, is convenient to processing and saves under the material condition, and fin is designed to be suitable for water conservancy diversion shape to condensate liquid, and it is gone up simultaneously increases the water conservancy diversion conduit with the guide functions of reinforcement to condensate liquid.3. gilled tube adopts elliptical tube or sub-elliptical pipe, has further strengthened heat convection.The heat transfer coefficient of heat exchanger can improve 20～40%.
Description of drawings
Fig. 1 is the overall structure schematic diagram of anti-corrosion copper condensing heat exchanger provided by the invention.
Fig. 2 a is that gilled tube is a pipe, and the upper and lower edge of fin adopts the structural representation of circular arc.
Fig. 2 b is that gilled tube is a pipe, and the upper and lower edge of fin adopts the structural representation that the water conservancy diversion conduit is arranged on circular arc and the fin.
Fig. 3 a is that gilled tube is an elliptical tube, and the upper and lower edge of fin adopts the structural representation of circular arc.
Fig. 3 a is that gilled tube is an elliptical tube, and the upper and lower edge of fin adopts the structural representation that the water conservancy diversion conduit is arranged on circular arc and the fin.
Fig. 4 a is that gilled tube is the sub-elliptical pipe, and the upper and lower edge of fin adopts the structural representation of circular arc.
Fig. 4 b is that gilled tube is the sub-elliptical pipe, and the upper and lower edge of fin adopts the structural representation that the water conservancy diversion conduit is arranged on circular arc and the fin.
Fig. 5 a is that gilled tube is a pipe, and the fin top edge is that trapezoidal shape polygon, lower limb are upside-down triangle shape polygonized structure schematic diagram.
Fig. 5 b is that gilled tube is an elliptical tube, and the fin top edge is that trapezoidal shape polygon, lower limb are upside-down triangle shape polygonized structure schematic diagram.
Fig. 6 is the sub-elliptical pipe for gilled tube, and the fin top edge is that trapezoidal shape polygon, lower limb are upside-down triangle shape polygonized structure schematic diagram.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
The overall structure schematic diagram of Fig. 1 anti-corrosion copper condensing heat exchanger provided by the invention.This condensing heat exchanger is made up of copper gilled tube 2 and the copper fin 1 that is arranged on this gilled tube, is base material with copper-nickel alloy or red copper, and all being coated with the sodium molybdate on described gilled tube outer surface and fin surface is the amorphous ni-cu-p chemical composite plating of stabilizing agent.Gilled tube generally adopts pipe, elliptical tube or sub-elliptical pipe; It is circular arc that fin can adopt upper and lower edge, or the top edge of fin is that trapezoidal shape polygon, lower limb are the upside-down triangle shape polygon, and also can adopt top edge is that trapezoidal shape polygon, lower limb are the polygonal structure of upside-down triangle shape; For upper and lower edge is the rib structure of circular arc, and its underpart also can be provided with condensation water water conservancy diversion conduit 3.
The manufacture method of condensing heat exchanger provided by the present invention is as follows:
1) with the copper material is base material, distinguishes processing and fabricating fin and gilled tube, and preliminary treatment (taking out stains) is carried out on its surface;
2) gilled tube outer surface and fin surface are carried out Ni-P for the first time: plating is the chemically composited plated film of amorphous ni-cu-p of stabilizing agent with the sodium molybdate under normal pressure, temperature are 80～90 ℃, and the component of plating bath and content are:
NiSO
4·7H
2O： 40～57g/L，
NaH
2PO
4·H
2O：?20～30g/L
Natrium citricum: 35～45g/L
CuSO
4·5H
2O： 0.5～1.5g/L
NH
4Ac： 30～40g/L
NH
4F： 1～2g/L
Na
2MoO
4·2H
2O：1～5mg/L；
The pH value of described plating bath is controlled to be 7～9.
3) will plate good gilled tube and fin expanded joint and make condensing heat exchanger, then with the identical condition of the chemical plating first time under condensing heat exchanger integral body is carried out the chemical plating second time, determine thickness of coating according to the corrosion-resistant time limit to product requirement, determine the chemical plating time according to desired thickness again, (when thickness of coating was 20 μ m, the corrosion-resistant time limit of coating was about 5～6 years promptly to make the anticorrosion condensing heat exchanger that has the chemically composited layer of amorphous ni-cu-p; When thickness of coating was 40 μ m, the corrosion-resistant time limit was about 10 years).
Embodiment 1:
Gilled tube adopts pipe, the last lower limb of fin is an arc-shaped structure, adopts and plates earlier the manufacturing process of plating again that afterwards expands, and be base material with the red copper, plating is the chemically composited plated film of amorphous ni-cu-p of stabilizing agent with the sodium molybdate under normal pressure, temperature are 88 ℃, and the component of plating bath and content are:
NiSO
4·7H
2O： 43g/L
NaH
2PO
4·H
2O：?25g/L
Natrium citricum: 40g/L
CuSO
4·5H
2O： 1g/L
NH
4Ac： 35g/L
NH
4F： 1g/L
Na
2MoO
4·2H
2O：1mg/L；
The pH value of plating bath is controlled to be 8, and coating film thickness is 30 μ m, can not only effectively improve its decay resistance, and the zinc-plated raising about 38% of heat exchanger heat transfer coefficient ratio tradition.
Gilled tube adopts elliptical tube, the upper and lower edge of fin is a circular arc, its underpart is provided with condensation water water conservancy diversion conduit, with the red copper is base material, adopt and plate earlier the manufacturing process of plating again that afterwards expands, plating is the chemically composited plated film of amorphous ni-cu-p of stabilizing agent with the sodium molybdate under normal pressure, temperature are 80 ℃, and the component of plating bath and content are:
NiSO
4·7H
2O： 57g/L
NaH
2PO
4·H
2O：?20g/L
Natrium citricum: 45g/L
CuSO
4·5H
2O： 0.5g/L
NH
4Ac： 30g/L
NH
4F： 1g/L
Na
2MoO
4·2H
2O：1mg/L；
The pH value of plating bath is controlled to be 7, and coating film thickness is 30 μ m.Can not only effectively improve its decay resistance, and the zinc-plated raising about 40% of heat exchanger heat transfer coefficient ratio tradition.
Embodiment 3:
Gilled tube is the sub-elliptical pipe, the fin top edge is that trapezoidal shape polygon, lower limb are the upside-down triangle shape polygonized structure, with the copper-nickel alloy is base material, adopt and plate earlier the manufacturing process of plating again that afterwards expands, plating is the chemically composited plated film of amorphous ni-cu-p of stabilizing agent with the sodium molybdate under normal pressure, temperature are 90 ℃, and the component of plating bath and content are:
NiSO
4·7H
2O： 40g/L
NaH
2PO
4·H
2O：?30g/L
Natrium citricum: 35g/L
CuSO
4·5H
2O： 1.5g/L
NH
4Ac： 40g/L
NH
4F： 2g/L
Na
2MoO
4·2H
2O：5mg/L；
The pH value of plating bath is controlled to be 9, and coating film thickness is 20 μ m.The heat exchanger heat transfer coefficient is approximately than the zinc-plated raising 35% of tradition.
Claims (7)
1. anti-corrosion copper condensing heat exchanger that utilizes flue gas heat energy, comprise copper gilled tube (2) and be arranged on copper fin (1) on this gilled tube, it is characterized in that: all being coated with the sodium molybdate on described gilled tube outer surface and fin surface is the amorphous ni-cu-p chemical composite plating of stabilizing agent.
2. according to the described anti-corrosion copper condensing heat exchanger that utilizes flue gas heat energy of claim 1, it is characterized in that: the upper and lower edge of described fin adopts circular arc or top edge to adopt trapezoidal shape polygon, lower limb to adopt the inverted triangle shape polygon to the condensation water water conservancy diversion.
3. according to the described anti-corrosion copper condensing heat exchanger that utilizes flue gas heat energy of claim 2, it is characterized in that: described lower limb adopts the bottom of circular arc fin to be provided with condensation water water conservancy diversion conduit (3).
4. according to claim 1, the 2 or 3 described anti-corrosion copper condensing heat exchangers that utilize flue gas heat energy, it is characterized in that: described gilled tube adopts pipe, elliptical tube or sub-elliptical pipe.
5. according to the described anti-corrosion copper condensing heat exchanger that utilizes flue gas heat energy of claim 1, it is characterized in that: it is base material that described copper gilled tube and fin adopt copper-nickel alloy or red copper.
6. manufacture method of utilizing the anti-corrosion copper condensing heat exchanger of flue gas heat energy as claimed in claim 1 is characterized in that this method carries out as follows:
1) with the copper material is base material, respectively processing and fabricating fin and gilled tube;
2) Ni-P is for the first time carried out on gilled tube outer surface and fin surface: in normal pressure, temperature is that to carry out under 80～90 ℃ with the sodium molybdate be the amorphous ni-cu-p Ni-P of stabilizing agent, and the component of plating bath and content are:
NiSO
4·7H
2O： 40～57g/L
NaH
2PO
4·H
2O：?20～30g/L
Natrium citricum: 35～45g/L
CuSO
4·5H
2O： 0.5～1.5g/L
NH
4Ac： 30～40g/L
NH
4F： 1～2g/L
Na
2MoO
4·2H
2O：1～5mg/L；
The PH of described plating bath is 7～9;
3) will plate good gilled tube and fin expanded joint and make condensing heat exchanger, then with the identical condition of the chemical plating first time under condensing heat exchanger integral body is carried out chemical plating second time, promptly make the anticorrosion condensing heat exchanger that has chemically composited layer of amorphous ni-cu-p.
7. according to the described manufacture method of claim 6, it is characterized in that: in normal pressure, temperature is that to carry out with the sodium molybdate under 88 ℃ be the amorphous ni-cu-p Ni-P of stabilizing agent, and the component of plating bath and content are:
NiSO
4·7H
2O： 43g/L
NaH
2PO
4·H
2O： 25g/L
Natrium citricum: 40g/L
CuSO
4·5H
2O： 1g/L
NH
4Ac： 35g/L
NH
4F： 1g/L
Na
2MoO
4·2H
2O：?1mg/L；
The PH of described plating bath is 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100021766A CN100353136C (en) | 2006-01-20 | 2006-01-20 | Anti-corrosion copper condensing heat exchanger utilizing smoke heat energy, and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100021766A CN100353136C (en) | 2006-01-20 | 2006-01-20 | Anti-corrosion copper condensing heat exchanger utilizing smoke heat energy, and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1800768A true CN1800768A (en) | 2006-07-12 |
| CN100353136C CN100353136C (en) | 2007-12-05 |
Family
ID=36810904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100021766A Expired - Fee Related CN100353136C (en) | 2006-01-20 | 2006-01-20 | Anti-corrosion copper condensing heat exchanger utilizing smoke heat energy, and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358771B (en) * | 2008-09-08 | 2010-06-02 | 中山华帝燃具股份有限公司 | Plate heat exchanger for condensing gas water heater |
| CN102095321A (en) * | 2011-03-07 | 2011-06-15 | 中国矿业大学 | Dirt adhesion resistant efficient heat exchanger |
| CN102251882A (en) * | 2010-05-07 | 2011-11-23 | 通用汽车环球科技运作有限责任公司 | Heat exchanger method and apparatus for engine exhaust gases |
| WO2012000236A1 (en) * | 2010-07-01 | 2012-01-05 | 北京建筑工程学院 | Combined ribbed tube anti-corrosion heat exchange device utilizing smoke to condense thermal energy |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2477931Y (en) * | 2001-02-09 | 2002-02-20 | 华电化学技术工程有限公司 | Anti-corrosion pipe having chemical nickel plated phosphorus alloy layer for steam condenser |
| CN1156606C (en) * | 2001-04-19 | 2004-07-07 | 上海交通大学 | Acid chemical plating liquid of nickel-base multicomponent alloy resisting corrosion of sea water |
| US20030066632A1 (en) * | 2001-10-09 | 2003-04-10 | Charles J. Bishop | Corrosion-resistant heat exchanger |
| JP2003161595A (en) * | 2001-11-20 | 2003-06-06 | Paloma Ind Ltd | Latent heat recovery heat exchanger |
| CN1536100A (en) * | 2003-04-07 | 2004-10-13 | 李 明 | Environment-protecting catalytic liquor for chemically-plating copper, nikel and phosphorus three-element alloy and its preparation method |
-
2006
- 2006-01-20 CN CNB2006100021766A patent/CN100353136C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358771B (en) * | 2008-09-08 | 2010-06-02 | 中山华帝燃具股份有限公司 | Plate heat exchanger for condensing gas water heater |
| CN102251882A (en) * | 2010-05-07 | 2011-11-23 | 通用汽车环球科技运作有限责任公司 | Heat exchanger method and apparatus for engine exhaust gases |
| WO2012000236A1 (en) * | 2010-07-01 | 2012-01-05 | 北京建筑工程学院 | Combined ribbed tube anti-corrosion heat exchange device utilizing smoke to condense thermal energy |
| CN102095321A (en) * | 2011-03-07 | 2011-06-15 | 中国矿业大学 | Dirt adhesion resistant efficient heat exchanger |
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| Publication number | Publication date |
|---|---|
| CN100353136C (en) | 2007-12-05 |
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