CN2546834Y - Overlap corrugated tube heat exchanger - Google Patents
Overlap corrugated tube heat exchanger Download PDFInfo
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- CN2546834Y CN2546834Y CN 02238743 CN02238743U CN2546834Y CN 2546834 Y CN2546834 Y CN 2546834Y CN 02238743 CN02238743 CN 02238743 CN 02238743 U CN02238743 U CN 02238743U CN 2546834 Y CN2546834 Y CN 2546834Y
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- heat exchanger
- corrugated tube
- water
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- tube heat
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Abstract
Disclosed is an overlapped corrugated pipe heat exchanger, which comprises first and second heat exchangers; wherein, each heat exchanger is single-shell-side double-pipe-side type; a heating water inlet, a heating water outlet, a heated water inlet, and a heated water outlet are all arranged on each heat exchanger; the heating water inlet of the first heat exchanger is connected with the heating water inlet of the second heat exchanger; the heated water outlet is connected with the heated water outlet of the second heat exchanger. The utility model overcomes the well-known shortcoming of the tube-shell heat exchanger. The utility model combines the advantages of the inner-structure of the common multi-tube heat exchanger and the single-station corrugated pipe heat exchanger. The utility model can completely lower the one-time backwater temperature, and can make the second-time water-supply temperature be effectively improved in the case that the condition of a certain one-time water available pressure-head and the one-time water-flow quantity is met so that the utility model quietly applicable for the need of the condition of the water-water heating network.
Description
Technical field
The utility model relates to the water-water heat-exchanger rig in a kind of heat supply field, especially a kind of eclipsed form corrugated tube heat exchanger.
Background technology
At present, the known shell-and-tube heat exchanger concentrated reflection of HVAC industry is two big classes: a class is a tubular heat exchanger, and another kind of is corrugated tube heat exchanger.
Tubular heat exchanger is to be heat exchange element with carbon steel pipe (wall thickness 2.5mm) or copper pipe (wall thickness 2.5mm), and general several strokes series connection are used, long flow path, and heat exchange is more abundant.But volume is big, easily fouling, heat transfer coefficient are lower.
Corrugated tube heat exchanger as heat exchange element, is widely used in the heat supply field with thin-wall stainless steel bellows (wall thickness 0.6-0.8mm) in recent years.Its heat transfer efficiency height, in light weight, volume is little, can slow down characteristics such as fouling is familiar with by everybody.But for heat exchanger itself, it is far from being enough that the high heat exchange element of heat exchange efficiency is only arranged, at different mediums, under the different duty parameter conditions, the appropriate design that the heat exchanger internal structure of different characteristics must be arranged just can make its efficient performance characteristics really be fully played.
At present, corrugated tube heat exchanger is separate unit formula corrugated tube heat exchanger, and promptly monoshell-multitube journey structure (as Fig. 1, Fig. 2) is widely used in vapour-water heat exchange field, and steam is walked shell side, is heated water and walks tube side.This structure both can make full use of the latent heat of vaporization of steam and the high temperature of condensed water, utilized the performance characteristics of thin-wall stainless steel again, and heat transfer coefficient can be up to 3000～4000kcal/m
2H ℃, heat-transfer effect is comparatively desirable.But, being used for water-water heat exchange, the heat-transfer effect of this kind version is along with the difference of heating medium parameter, and is subjected to very big influence, can't satisfy the demand.
Particularly require for the working condition of water-water heat net to be: a water temperature (adding hot water) difference is bigger, and flow is less, require secondary water-supply (being heated water) temperature than high ten degree of primary water temperature about (heating: 125/70 ℃ 60/85 ℃; Domestic hot-water: 70/40 ℃ 12/55 ℃).Under this special working condition, above-mentioned separate unit formula corrugated tube heat exchanger often causes the primary water temperature can not fall, and the secondary water-supply temperature rises the phenomenon not get on, can't satisfy the working condition requirement of above-mentioned water hydro-thermal net.
Show under sufficient situation of discharge by a large amount of test results, the common feature that various forms of separate unit corrugated tube heat exchangers exist is: the secondary water-supply temperature is all low by seven than primary water temperature, octave does not wait, and best situation monoshell journey-five tube side also only can make secondary water-supply temperature and primary water temperature remain basically stable.All can not satisfy the requirement about above-mentioned water-water heat net secondary water-supply temperature is spent than primary water temperature high ten.
In theory, monoshell-multitube journey structure has reduced the logarithmic mean temperature difference (LMTD) value, thereby has had a strong impact on heat transfer efficiency owing to the existence of non-pure adverse current.Though along with the increase of tube side quantity, the temperature difference of secondary water-supply temperature and primary water temperature reduces gradually, has secondary water-supply temperature≤primary water temperature all the time.
For multi-tube pass heat exchanger, because tube side has prolonged, abundant heat exchange to medium has certain help, but since the longitudinal baffle in the housing with the process of manufacture of cylindrical shell in exist the fit-up gap that is difficult to avoid, make the segment fluid flow in the housing not walk, but directly flow to the exit of shell side from the gap by flow process.Therefore, because the gap shorting that longitudinal baffle exists, this longitudinal baffle has hindered the abundant heat exchange of tube bank.When the fluid of shell side flowed at cross-flow tube bank, by back row, the eddy current of tube bank and the disturbance of eddy flow were big more more, and the convective heat-transfer coefficient value is also just big more.In general, the later just influence of no longer managed row's number of tube bank of ten rows.The existing in of longitudinal baffle hindered the rear of tube bundle on certain degree the eddy current and the abundant disturbance of eddy flow.Therefore hindered the abundant heat exchange of two kinds of mediums.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of corrugated tube heat exchanger is provided, especially a kind of advantage that combines traditional tubular heat exchanger and separate unit formula corrugated tube heat exchanger can satisfy the eclipsed form corrugated tube heat exchanger that the primary water temperature is lower than the secondary water-supply temperature.
Technical solution of the present utility model is: a kind of eclipsed form corrugated tube heat exchanger, comprise first and second heat exchangers, and each heat exchanger is monoshell journey two-tube-pass heat exchanger; Be provided with on described each heat exchanger and add the hot water inlet, add hot water outlet and be heated water inlet, be heated water out, the water out that is heated that is heated on the water inlet and second heat exchanger on hot water inlet, first heat exchanger that adds that adds on the hot water outlet and second heat exchanger on first heat exchanger links.
Aforesaid eclipsed form corrugated tube heat exchanger, described two heat exchangers are horizontal setting, and first heat exchanger is horizontally placed on the top of second heat exchanger, and the lower housing portion of second heat exchanger is provided with fixing supporting legs.
Aforesaid eclipsed form corrugated tube heat exchanger is provided with fixedly connected between described two heat exchangers.
Aforesaid eclipsed form corrugated tube heat exchanger, described two heat exchangers are horizontal setting, and the lower housing portion of first, second heat exchanger is respectively equipped with fixing supporting legs, and second heat exchanger is horizontally placed on a side of first heat exchanger.
Aforesaid eclipsed form corrugated tube heat exchanger can be provided with the muscle that is fixedly connected between described two heat exchangers.
Aforesaid eclipsed form corrugated tube heat exchanger, described two heat exchangers are vertically to be provided with, and the bottom of first heat exchanger and second heat exchanger is respectively equipped with fixing supporting legs.
Aforesaid eclipsed form corrugated tube heat exchanger can be provided with the muscle that is fixedly connected between described two heat exchangers.
Aforesaid eclipsed form corrugated tube heat exchanger, the diameter of described bellows is not more than 32mm.
The utility model has the advantages that: eclipsed form corrugated tube heat exchanger of the present utility model, fundamentally solved the problem that separate unit formula corrugated tube heat exchanger exists, that is: solved the problem that the primary water temperature is higher than the secondary water-supply temperature.Reached the working condition requirement of water-water heat net, that is: a water temperature (adding hot water) difference is bigger, and flow is less, require secondary water-supply (being heated water) temperature than high ten degree of primary water temperature about (heating: 125/70 ℃ 60/85 ℃; Domestic hot-water: 70/40 ℃ 12/55 ℃).
Though eclipsed form corrugated tube heat exchanger also pure adverse current of right and wrong on internal structure, because under domestic hot-water and the heating operating mode, the correction factor of logarithmic mean temperature difference (LMTD) is all greater than 0.8, therefore, the design of its liquid form is rational.The outstanding feature of eclipsed form corrugated tube heat exchanger is the advantage that combines traditional tubular heat exchanger and separate unit formula corrugated tube heat exchanger internal structure, and its shell side velocity ratio separate unit formula corrugated tube heat exchanger shell side flow velocity improves a lot, can fully reduce the primary water temperature, under the working condition that satisfies a certain available pressure head of water and a discharge, secondary water supply water temperature is improved fully, thereby adapted to the needs of the working condition of above-mentioned water-water heat net preferably.
Description of drawings
Fig. 1 is separate unit formula monoshell of the prior art-multitube journey structure corrugated pipe heat exchanger structure schematic diagram;
Fig. 2 is another kind of separate unit formula monoshell of the prior art-multitube journey structure corrugated pipe heat exchanger structure schematic diagram;
Fig. 3 is an eclipsed form corrugated tube heat exchanger horizontal type structure schematic diagram of the present utility model;
The profile that Fig. 4 cuts open along A-A for eclipsed form corrugated tube heat exchanger horizontal type structure among Fig. 3;
Fig. 5 is an eclipsed form corrugated tube heat exchanger vertical structure schematic diagram of the present utility model;
The profile that Fig. 6 cuts open along B-B for eclipsed form corrugated tube heat exchanger vertical structure among Fig. 5.
The specific embodiment
Now be described with reference to the accompanying drawings the specific embodiment of the present utility model.
Fig. 3 has illustrated the primary structure of eclipsed form corrugated tube heat exchanger of the present utility model to Fig. 6.Wherein, this kind eclipsed form corrugated tube heat exchanger comprise first and second heat exchangers 1 and 1 ', two ends have bobbin carriage 2,2 ', the housing 3,3 of each heat exchanger ' in be respectively equipped with two tube sides 4,5 and 4 ', 5 '; Described each heat exchanger 1 and 1 ' on be provided with add hot water inlet 6,6 ', add hot water outlet 7,7 ' and be heated water inlet 8,8 ', be heated water out 9,9 ', wherein on first heat exchanger 1 add hot water outlet 7 and second heat exchanger 1 ' on add hot water inlet 6 ', be heated on first heat exchanger 1 water inlet 8 and second heat exchanger 1 ' on be heated water out 9 ' link.
In Fig. 3, described two heat exchangers 1,1 ' be horizontal setting, the housing 3 of first heat exchanger 1 be horizontally placed on second heat exchanger 1 ' the top, second heat exchanger, 1 ' bottom is provided with fixing supporting legs 10.Between described two heat exchangers, be provided with fixedly connected 11.
As can see from Figure 4, eclipsed form corrugated tube heat exchanger of the present utility model have respectively two tube sides 4,5 and 4 ', 5 '.The diameter of bellows is not more than 32mm.
In addition, in horizontal setting of described two heat exchangers, first, second heat exchanger 1,1 ' lower housing portion can be respectively equipped with fixing supporting legs, second heat exchanger is horizontally placed on a side of first heat exchanger.
Fig. 5 and 6 is another embodiment of the present utility model.Wherein, described two heat exchangers 1,1 ' be vertically are provided with, and the lower housing portion of heat exchanger is respectively equipped with fixing supporting legs 10, the second heat exchangers 1 ' a be horizontally placed on side of first heat exchanger 1.Its annexation with first, second heat exchanger 1,1 in horizontal the setting ' annexation.
Existing simple declaration eclipsed form corrugated tube heat exchanger of the present utility model operation principle.
Criterion equation according to the eclipsed form corrugated tube heat exchanger:
△ P
Pipe=E-V
Pipe F... ... ... ... ... (C) △ P
Shell=GV
Shell H... ... ... ... ... .. (d) reaches
Wherein, the Prandtl number Pr in the (a) and (b) formula is in the regression formula.
As seen, at △ P
Pipe, △ P
ShellUnder the condition that allows, improve V as far as possible
Pipe, V
ShellThereby, the K value is increased, simultaneously since the K value always than α
Pipe, α
ShellBoth less one also little, so when enhancing heat transfer, must could increase the K value to an increase of α minimum most effectively.
By (a) and (b) two formulas as seen, at V
Pipe≈ V
ShellThe time, α
Pipe＜α
ShellTherefore improve V
Pipe, make α
PipeImprove, the K value just can have obvious increase.So we find in test: increase a discharge than increasing secondary discharge, it is more remarkable that the K value improves ground.As: G
1=10t/h, G
2During=25t/h, k=1840w/m
2K
If a flow increases to G
1=15t/h, G
2Constant, k=2150w/m then
2K
If flow G
1Constant, the secondary flow increases to G
2=30t/h, then k=1950w/m
2K.
According to above principle, in the utility model, adopt the bellows of Φ 32 or Φ 22 little calibers to replace the bellows of Ф 45 in the prior art, thereby make velocity in pipes V
PipeBe improved.The flow velocity of housing medium simultaneously, by regulate deflection plate 12,12 ' spacing control.In satisfying pressure vessel GB design specification, under the situation of pertinent regulations, adjust F
PipeWith F
ShellRatio, thereby make α
PipeWith α
ShellMate more, realize the reasonability of K value, see following table 1 for details.
Table 1
| Heat exchanger tube | Baffle(s) spacing | The shell side actual internal area | The shell side flow velocity | Heat exchange area | |
| Separate unit formula corrugated tube heat exchanger 400 | Ф 45，L＝2.5m | 196mm | 0.0635m 2 | V The eclipsed form rippleHeat exchange of heat pipe=1.87V Separate unitThe formula corrugated tube heat exchanger | 7.8m 2 |
| Eclipsed form corrugated tube heat exchanger 400 | Ф 32，L＝2.5m | 122mm | 0.0345m 2 | 14.7m 2 |
Adopt the bellows of Ф 32 little calibers to replace in the prior art bellows of Ф 45 in the separate unit formula corrugated tube heat exchanger, make the heat exchange area of heat exchanger of same nominal diameter improve a lot.
Test by eclipsed form corrugated tube heat exchanger corrugated tube heat exchanger and carbon steel tubular heat exchanger is compared, and table 2 is listed the coefficient value of formula (a) and (b) in the criterion equation, (c), (d).
Table 2
| A | B | C | D | E | F | G | H | |
| The carbon steel tubular heat exchanger | 0.025 | 0.761 | 0.233 | 0.661 | 7.06 | 1.27 | 12.5 | 1.38 |
| Eclipsed form corrugated tube heat exchanger 200 bellowss | 0.065 | 0.797 | 0.634 | 0.565 | 17.8 | 1.61 | 13.9 | 1.28 |
The parameter list of being made certain heat supply network heating and domestic hot-water's operating mode by criterion equation is as follows:
Table 3
| Operating mode | Once | Secondary | | The logarithm temperature difference | Heat transfer coefficient kl/hm 2·℃ | Heat exchange area m 2 | ||||
| Temperature ℃ | Flow (t/h) | Temperature ℃ | Flow (t/h) | Carbon steel | The eclipsed form corrugated tube heat exchanger | Carbon steel | The eclipsed form corrugated tube heat exchanger | |||
| Give birth to heat | 70/40 | 14.3 | 12/55 | 10 | 0.43 | 20.8 | 770 | 1680 | 31.5 | 14.4 |
| 21.3 | 15 | 0.64 | 20.8 | 988 | 2145 | 36.8 | 17.0 | |||
| Heating | 125/65 | 5.83 | 60/85 | 14 | 0.35 | 16.8 | 738 | 1848 | 33.0 | 13.2 |
| 11.7 | 28 | 0.70 | 16.8 | 1140 | 2874 | 42.1 | 17.0 | |||
By table 3 as seen, under identical working condition, among the hot water supply system, the heat transfer coefficient of eclipsed form corrugated tube heat exchanger is 2.2 times of carbon steel tubulation; In the heating system, the heat transfer coefficient of eclipsed form corrugated tube heat exchanger is 2.5 times of carbon steel tubulation.
By above analysis as seen, the eclipsed form corrugated tube heat exchanger is greatly improved than separate unit formula corrugated tube heat exchanger on structural design, and has heat transfer efficiency far above the advantage of carbon steel tubular heat exchanger. The outstanding feature of eclipsed form corrugated tube heat exchanger is the advantage that combines traditional tubular heat exchanger and separate unit formula corrugated tube heat exchanger internal structure, can fully reduce the primary water temperature, under the working condition that satisfies a certain available pressure head of water and a discharge, the intermediate water supply water temperature is improved fully, thereby be adapted to preferably present heating and domestic hot-water's needs.
Claims (8)
1, a kind of eclipsed form corrugated tube heat exchanger, it is characterized in that: this heat exchanger comprises first and second heat exchangers, each heat exchanger is monoshell journey two-tube-pass heat exchanger; Be provided with on described each heat exchanger and add the hot water inlet, add hot water outlet and be heated water inlet, be heated water out, the water out that is heated that is heated on the water inlet and second heat exchanger on hot water inlet, first heat exchanger that adds that adds on the hot water outlet and second heat exchanger on first heat exchanger links.
2, eclipsed form corrugated tube heat exchanger as claimed in claim 1 is characterized in that: described two heat exchangers are horizontal setting, and first heat exchanger is horizontally placed on the top of second heat exchanger, and the lower housing portion of second heat exchanger is provided with fixing supporting legs.
3, eclipsed form corrugated tube heat exchanger as claimed in claim 2 is characterized in that: be provided with fixedly connected between described two heat exchangers.
4, eclipsed form corrugated tube heat exchanger as claimed in claim 1 is characterized in that: described two heat exchangers are horizontal setting, and the lower housing portion of first, second heat exchanger is respectively equipped with fixing supporting legs, and second heat exchanger is horizontally placed on a side of first heat exchanger.
5, eclipsed form corrugated tube heat exchanger as claimed in claim 4 is characterized in that: can be provided with the muscle that is fixedly connected between described two heat exchangers.
6, eclipsed form corrugated tube heat exchanger as claimed in claim 1 is characterized in that: described two heat exchangers are for vertically being provided with, and the bottom of first heat exchanger and second heat exchanger is respectively equipped with fixing supporting legs.
7, eclipsed form corrugated tube heat exchanger as claimed in claim 6 is characterized in that: can be provided with the muscle that is fixedly connected between described two heat exchangers.
8, as claim 1,2,4,6 described eclipsed form corrugated tube heat exchangers, it is characterized in that: the diameter of bellows is not more than 32mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02238743 CN2546834Y (en) | 2002-06-17 | 2002-06-17 | Overlap corrugated tube heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02238743 CN2546834Y (en) | 2002-06-17 | 2002-06-17 | Overlap corrugated tube heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2546834Y true CN2546834Y (en) | 2003-04-23 |
Family
ID=33712351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02238743 Expired - Fee Related CN2546834Y (en) | 2002-06-17 | 2002-06-17 | Overlap corrugated tube heat exchanger |
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|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250659A (en) * | 2011-06-22 | 2011-11-23 | 中国石油集团工程设计有限责任公司 | Precooler for dehydration and dehydrocarbon of natural gas |
| WO2012009965A1 (en) * | 2010-07-23 | 2012-01-26 | 镇海石化建安工程有限公司 | Cooler for feed gas of low-temperature methanol washing |
| CN101532756B (en) * | 2008-09-16 | 2012-05-23 | 林金正 | Parallel connection type heat exchanger |
| CN104729346A (en) * | 2013-12-24 | 2015-06-24 | 珠海格力电器股份有限公司 | Shell pipe protecting plate and mounting method thereof and shell pipe heat exchanger |
| CN106123638A (en) * | 2016-06-29 | 2016-11-16 | 新兴能源装备股份有限公司 | A kind of eclipsed form carburator of liquefied natural gas |
| CN108426470A (en) * | 2017-02-15 | 2018-08-21 | 东管重工(沈阳)有限公司 | Circulating air heat exchanger |
-
2002
- 2002-06-17 CN CN 02238743 patent/CN2546834Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532756B (en) * | 2008-09-16 | 2012-05-23 | 林金正 | Parallel connection type heat exchanger |
| WO2012009965A1 (en) * | 2010-07-23 | 2012-01-26 | 镇海石化建安工程有限公司 | Cooler for feed gas of low-temperature methanol washing |
| CN102250659A (en) * | 2011-06-22 | 2011-11-23 | 中国石油集团工程设计有限责任公司 | Precooler for dehydration and dehydrocarbon of natural gas |
| CN104729346A (en) * | 2013-12-24 | 2015-06-24 | 珠海格力电器股份有限公司 | Shell pipe protecting plate and mounting method thereof and shell pipe heat exchanger |
| CN106123638A (en) * | 2016-06-29 | 2016-11-16 | 新兴能源装备股份有限公司 | A kind of eclipsed form carburator of liquefied natural gas |
| CN108426470A (en) * | 2017-02-15 | 2018-08-21 | 东管重工(沈阳)有限公司 | Circulating air heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030423 Termination date: 20100617 |