CN101013009A - Combined helix baffle plate shell-and-tube heat exchanger - Google Patents
Combined helix baffle plate shell-and-tube heat exchanger Download PDFInfo
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- CN101013009A CN101013009A CN 200710017395 CN200710017395A CN101013009A CN 101013009 A CN101013009 A CN 101013009A CN 200710017395 CN200710017395 CN 200710017395 CN 200710017395 A CN200710017395 A CN 200710017395A CN 101013009 A CN101013009 A CN 101013009A
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Abstract
The invention discloses a combined screw divert plate tubular heat exchanger, wherein, in one pitch, the screw divert plate is radial divided into inner and outer parts; the central area in the frame has discontinuous inner screw while outside the central area, uses continuous annular screw divert plate to form continuous outer screw; the outer screw divert plate surrounds the inner screw divert plate. For the horizontal heat exchanger, when the medium is accumulated with dirt, the nearby outer screw divert plate is mounted to make the connection at the bottom of heat exchanger, and the outer edge of each connection has a cut at the connected part. The invention can reduce flowing resistance, improve heat exchange efficiency and improve the service life. The invention also provides the method for processing the continuous screw divert plates, to confirm the concentric property of holes of divert plate.
Description
Technical field
The present invention relates to a kind of shell-and-tube heat exchanger that in industrial circles such as petrochemical industry, energy source and power, metallurgy, refrigeration, desalinization, uses, the processing method of particularly a kind of combined helix baffle plate shell-and-tube heat exchanger and external spiral deflection plate thereof.
Background technology
Heat exchanger is in one of widely used visual plants of industrial circle such as petrochemical industry, energy source and power, metallurgy, refrigeration, desalinization, shell-and-tube heat exchanger proportion maximum in the heat transmission equipment total amount, about 55～70%.It is simple in structure, mainly comprises heat-exchanging tube bundle and housing two parts, and a kind of fluid flows in pipe, and the shell-side of one other fluid outside pipe flows, and two kinds of fluids are by tube wall indirect exchange heat.
There are a lot of problems in tradition bow type deflection plate: (1) bow type deflection plate makes fluid vertical impact shell wall side, causes greatlyyer along the journey pressure drop, increases the power-equipment load; (2) the horizontal heat-exchanging tube bundle of plunderring of the fluid of high flow rate can be induced the vibration of heat exchanger tube, has shortened the life-span of heat exchanger; (3) deflection plate and shell wall side joint produce the stagnation dead band of flowing, and have reduced heat exchange efficiency, and fouling easily.At these problems, some novel pipe shell type heat exchangers have been developed in recent years, spiral baffle heat exchanger becomes helicoid to arrangement of baffles, make in the heat exchanger shell fluid in the shape of a spiral shape flow, to realize reducing effectively the flow resistance of shell-side and the purpose of augmentation of heat transfer.Existing spiral baffle heat exchanger has two classes, one class is to adopt two or polylith is fan-shaped, elliptical plate is formed approximate spiral camber discontinuous spiral baffle heat exchanger, another kind of is the continuous helical deflecting plate heat exchanger that adopts the continuous helical curved surface, as seen (publication number is domestic and international patent: CN2387496, CN1858543, CN1804528, US5832991A, US6827138B1, EP1668306A1, WO2005019758A1).For discontinuous helical baffles, continuous helical deflecting plate makes and flows more near screw type, can further reduce resistance and leakage current, but its processing is than discontinuous helical baffles complexity, especially when pitch is big, helicoid near the central axis place becomes comparatively precipitous, make continuous curve surface processing and on curved surface location drilling more difficult, even can't realize, at present continuous helical deflecting plate pipe and shell type heat exchanger adopts the mode that installs certain diameter core pipe at the axis place additional to make the easier realization helical flow of shell fluid more, reduced the difficulty of processing of continuous helical deflecting plate to a certain extent, but owing to do not walk fluid in the core pipe, reduced the heat exchanger effective heat exchange area relatively, and core pipe diameter increases along with the increase of deflection plate pitch.On the other hand, general industry is horizontal with the many employings of shell-and-tube heat exchanger, though adopt continuous helical deflecting plate to reduce leakage current, but when shell-side flow through be the medium of easy fouling the time, heat exchanger bottom still may be owing to low excessively flow velocity forms incrustation, especially under the less situation of helical angle, and a large amount of dirt depositions, can't remove, seriously reduce heat exchange efficiency.
Summary of the invention
In order to overcome above-mentioned weak point, the invention provides the processing method of a kind of combined helix baffle plate shell-and-tube heat exchanger and external spiral deflection plate thereof, it is more reasonable to make that shell-side flows, can reduce flow resistance, and significantly reduce dirt deposition, improve heat exchange efficiency, also can overcome the problem of continuous helical deflecting plate Machining of Curved Surface and location drilling difficulty in addition.
Technical scheme of the present invention is achieved in that and the present invention includes housing, the shell-side inlet pipe, the shell-side outlet, heat-exchanging tube bundle, tube sheet and the polylith inside spin deflection plate and the polylith external spiral deflection plate that are arranged in the tube bank, shell-side inlet pipe on the housing and shell-side outlet employing side are advanced side and are gone out form, being close to the housing outward flange installs, along direction inflow and the outflow shell-side space tangent with housing, heat-exchanging tube bundle interts at the inside spin deflection plate, external spiral deflection plate and being positioned on two tube sheets at housing two ends, in each pitch, the inside spin deflection plate is positioned at the enclosure interior central zone of space, the external spiral deflection plate is around the inside spin arrangement of baffles, in inside spin deflection plate and external spiral deflection plate lap-joint, the edge of inside spin deflection plate and external spiral deflection plate interts on same circle heat-exchanging tube bundle, and every inside spin deflection plate outward flange and external spiral deflection plate are close to installation.
In each pitch, the inside spin deflection plate is to be overlapped mutually by some fan-shaped or oval-shaped flat boards to form, and the external spiral deflection plate is a continuous helical curve panel.
Described inside spin deflection plate can be replaced by the core pipe.
The outer vortex edge of each piece external spiral deflection plate can cut out a breach in lap-joint, forms hypotenuse.
A kind of processing method of combined helix baffle plate shell-and-tube heat exchanger external spiral deflection plate, some external spiral deflection plate sheet-metal unfolding flat boards are stacked, each circle centre position of having good positioning gets out the locating hole of diameter less than the tube bank hole earlier on the helical baffles sheet-metal unfolding flat board outside, external spiral deflection plate sheet-metal unfolding flat board then one by one stretches, get out the tube bank hole according to the locating hole location again, form the external spiral deflection plate.
The processing method of another kind of combined helix baffle plate shell-and-tube heat exchanger external spiral deflection plate, some external spiral deflection plate sheet-metal unfolding flat boards are stacked, each circle centre position of having good positioning directly gets out the tube bank hole on the helical baffles sheet-metal unfolding flat board outside, the external spiral deflection plate sheet-metal unfolding flat board that stretches one by one then forms the external spiral deflection plate.
The present invention is mobile more reasonable in order to make, shell-side inlet pipeline and outlet conduit employing side are advanced side and are gone out form, be that they all are close to the installation of housing outward flange, along direction inflow and the outflow shell-side space tangent with housing, can make shell fluid more meet the characteristic of helical flow like this, make the flow field more smooth, reduce the local resistance that import and export causes.
For the easier formation helical flow of enclosure interior, the present invention adopts combined helix baffle plate, the continuous helical deflecting plate form is adopted in most of space in housing, in processing with the difficult housing central area of continuous helical deflecting plate is installed adopts discontinuous helical baffles form, the shell-side that the mounting core pipe causes and the waste in pipe side space have been avoided.
In order to process continuous helical deflecting plate accurately and efficiently, the present invention proposes the processing method of two kinds of continuous helical deflecting plates, guaranteed the proper alignment in tube bank hole on the every continuous helical deflecting plate, and got out the tube bank hole shape on the continuous helical deflecting plate after the stretching exactly, be convenient to install.
When the easy incrustation of shell fluid, outer vortex edge to each piece external spiral deflection plate excises a breach in lap-joint, like this when two adjacent external spiral deflection plates overlap, just form a breach in lap-joint, this breach is installed on the bottom that the horizontal heat exchanger dirt is easy to deposit, can be so that segment fluid flow circulate from here, reduce the dirt that flow dead is also taken away the shell fluid deposition, prevent more dirt deposition and influence the heat exchange effect of heat exchanger tube bottom the heat exchanger.
Description of drawings
Fig. 1 is a combined helix baffle plate shell-and-tube heat exchanger schematic diagram of the present invention.
Fig. 2 is a combined type internal and external screw deflection plate schematic diagram of the present invention.
Fig. 3 (a) is external spiral deflection plate sheet-metal unfolding figure.
Fig. 3 (b) is location, center of circle schematic diagram on the external spiral deflection plate that launches.
Fig. 3 (c) is the schematic diagram of directly holing on the external spiral deflection plate that launches.
Fig. 4 is external spiral plate of the present invention lap-joint schematic diagram.
Fig. 5 (a) is an external spiral deflection plate helical angle schematic diagram.
Fig. 5 (b) is external spiral deflection plate scheme of installation when the inside spin deflection plate is not set.
Below in conjunction with accompanying drawing content of the present invention is described in further detail.
The specific embodiment
With reference to shown in Figure 1, combined helix baffle plate shell-and-tube heat exchanger 1 of the present invention comprises housing 2, shell-side inlet pipe 2a, shell-side outlet 2b, heat-exchanging tube bundle 3, tube sheet 4, inside spin deflection plate 5 and external spiral deflection plate 6.Shell-side inlet pipe 2a on the housing 2 and shell-side outlet 2b employing side are advanced side and are gone out form, being close to housing 2 outward flanges installs, direction inflow and outflow shell-side space along tangent with housing can make shell fluid more meet the characteristic of helical flow like this, reduce to import and export the local resistance that causes.Heat-exchanging tube bundle 3 interts at inside spin deflection plate 5, external spiral deflection plate 6 and is positioned on two tube sheets 4 at housing two ends, in each pitch, inside spin deflection plate 5 is positioned at the central area of housing 2 inner spaces, external spiral deflection plate 6 is arranged around inside spin deflection plate 5, in lap-joint, the edge of inside spin deflection plate 5 and external spiral deflection plate 6 interts on same circle heat-exchanging tube bundle 3, and the outward flange of every inside spin deflection plate 5 and external spiral deflection plate 6 are close to installation.For heat-exchanging tube bundle 3 is installed, on inside spin deflection plate 5 and external spiral deflection plate 6, be equipped with tube bank hole 3c.When the easy incrustation of shell fluid, adjacent external spiral deflection plate 6 lap-joints can cut out breach and form hypotenuse 7, so that blowdown.
With reference to shown in Figure 2, be combined type internal and external screw deflection plate schematic diagram.In same pitch, helical baffles is divided into inside and outside two parts, and inside spin deflection plate 5 is formed by some ellipses or fan-shaped flat board and the angled overlap joint of axis, and external spiral deflection plate 6 is continuous curve surface plates of an annular.Inside and outside helical baffles makes shell fluid flow twist, thus enhanced heat exchange.Show among the figure that inside spin deflection plate 5 is an example so that four fan-shaped flat boards to be set, the number of fan-shaped flat board also can be 2,3,5... (flat board is ellipse when number is 2).For the external spiral deflection plate 6 of inside spin deflection plate 5 and continuous curve surface being overlapped comparatively closely to reduce leakage current, inside spin deflection plate 5 is close to layout with external spiral deflection plate 6, and interts jointly on same circle heat-exchanging tube bundle 3 with external spiral deflection plate 6.
Shown in Fig. 3 (a), Fig. 3 (b) and Fig. 3 (c), be the tube bank hole forming method figure on external spiral deflection plate sheet-metal unfolding floor map and the plate.Fig. 3 (a) is external spiral deflection plate sheet-metal unfolding figure, the dull and stereotyped 6a of the sheet-metal unfolding of external spiral deflection plate 6, and the home position 3a to the tube bank hole that will bore on it accurately locatees in advance.For hard deflection plate materials such as metals, can adopt the method shown in Fig. 3 (b), earlier the dull and stereotyped 6a of some external spiral deflection plate sheet-metal unfoldings is stacked, get out the locating hole 3b of diameter earlier less than tube bank hole 3c at the 3a place, the center of circle that each is had good positioning, after then dull and stereotyped 6a being stretched one by one again polylith stack, simultaneously some deflection plates are got out required tube bank hole 3c according to locating hole 3b location, can guarantee the proper alignment in every helical baffles tube bank hole like this, and get out exactly on the continuous deflection plate after the stretching and restrain hole shape, be convenient to install.For soft deflection plate materials such as plastics, can adopt that method directly obtains to restrain the hole shown in Fig. 3 (c), promptly the dull and stereotyped 6a of some external spiral deflection plate sheet-metal unfoldings is stacked, directly get out circular tube bank hole 3c at the tube bank hole circle centre position that each is had good positioning then, the dull and stereotyped 6a that stretches at last obtains required external spiral deflection plate 6, after soft material stretched, the tube bank hole was out of shape thereupon, and the back can be expanded to obtain required shape once more with the unmatched tube bank of heat exchanger tube diameter hole for stretching.
With reference to shown in Figure 4,, can improve the form of external spiral deflection plate in order to solve the dirt deposition problem.Outer vortex edge to each piece external spiral deflection plate 6 excises a breach in lap-joint, form the hypotenuse 7 among the figure, like this when two adjacent external spiral deflection plates overlap, just form a breach at two hypotenuse 7 places of lap-joint, this breach is installed on the bottom that the horizontal heat exchanger dirt is easy to deposit, can be so that segment fluid flow circulates from here, reduce flow dead and also take away the dirt of shell fluid precipitation, prevent more dirt deposition and influence the heat exchange effect of heat exchanger tube bottom the heat exchanger.When shell-side adopted comparatively clean working medium, this breach can not be provided with.
Shown in Fig. 5 (a), be external spiral deflection plate helical angle schematic diagram.Annular external spiral deflection plate 6 continuously is α at the inner radius inner-spiral angle.Helical angle is by formula α=arctan (P
t/ π D) determines, wherein P
tBe pitch, D is the projection circular diameter of helix on the housing cross section of external spiral deflection plate 6 inner radius.Under the certain situation of diameter of the housing, along with the increase of pitch, pitch angle alpha will increases gradually, makes helicoid become comparatively precipitous, and continuous helical deflecting plate herein is difficult for shaping, and the difficulty of holing on precipitous curved surface also increases.In order to overcome processing difficulties, can be that the central area of D is provided with discrete inside spin deflection plate 5 at the comparatively precipitous diameter of helical angle, the zone of satisfying processing request in the outside, central area is provided with continuous annular external spiral deflection plate 6, forms combined type helical baffles structure.
Shown in Fig. 5 (b), outside under the situation that helical baffles 6 is easy to process, diameter be D the central area hour, also can replace inside spin deflection plate 5 with core pipe 8, equally, when shell fluid easily during incrustation, adjacent external spiral deflection plate 6 can cut out breach in lap-joint and form hypotenuse 7, so that blowdown.
Claims (6)
1. combined helix baffle plate shell-and-tube heat exchanger, comprise housing (2), shell-side inlet pipe (2a), shell-side outlet (2b), heat-exchanging tube bundle (3), tube sheet (4) and be arranged in polylith inside spin deflection plate (5) and polylith external spiral deflection plate (6) in the tube bank, it is characterized in that, shell-side inlet pipe (2a) on the described housing (2) and shell-side outlet (2b) employing side are advanced side and are gone out form, being close to housing (2) outward flange installs, along direction inflow and the outflow shell-side space tangent with housing, heat-exchanging tube bundle (3) interts in inside spin deflection plate (5), external spiral deflection plate (6), and be connected on two tube sheets (4) at housing two ends, in each pitch, inside spin deflection plate (5) is positioned at the central area of housing (2) inner space, external spiral deflection plate (6) is arranged around inside spin deflection plate (5), in inside spin deflection plate (5) and external spiral deflection plate (6) lap-joint, the edge of inside spin deflection plate (5) and external spiral deflection plate (6) interts on same circle heat-exchanging tube bundle (3), and every inside spin deflection plate (5) outward flange and external spiral deflection plate (6) are close to installation.
2. combined helix baffle plate shell-and-tube heat exchanger according to claim 1, it is characterized in that, in each pitch, inside spin deflection plate (5) is to be overlapped mutually by some fan-shaped or oval-shaped flat boards to form, and external spiral deflection plate (6) is a continuous helical curve panel.
3. the described combined helix baffle plate shell-and-tube heat exchanger of claim 1 is characterized in that, inside spin deflection plate (5) is replaced by the core pipe.
4. combined helix baffle plate shell-and-tube heat exchanger according to claim 1 is characterized in that, the outer vortex edge of each piece external spiral deflection plate (6) can cut out a breach in lap-joint, forms hypotenuse (7).
5. the processing method of a combined helix baffle plate shell-and-tube heat exchanger external spiral deflection plate, it is characterized in that, some external spiral deflection plate sheet-metal unfolding flat boards (6a) are stacked, helical baffles sheet-metal unfolding flat board (6a) is gone up each center of circle of having good positioning (3a) and is located to get out earlier the locating hole (3b) of diameter less than tube bank hole (3c) outside, external spiral deflection plate sheet-metal unfolding flat board (6a) then one by one stretches, get out tube bank hole (3c) according to locating hole (3b) location again, form external spiral deflection plate (6).
6. the processing method of a combined helix baffle plate shell-and-tube heat exchanger external spiral deflection plate, it is characterized in that, some external spiral deflection plate sheet-metal unfolding flat boards (6a) are stacked, helical baffles sheet-metal unfolding flat board (6a) is gone up each center of circle of having good positioning (3a) and is located directly to get out tube bank hole (3c) outside, the external spiral deflection plate sheet-metal unfolding flat board (6a) that stretches one by one then forms external spiral deflection plate (6).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100173956A CN100453951C (en) | 2007-02-09 | 2007-02-09 | Combined helix baffle plate shell-and-tube heat exchanger |
| US11/966,256 US7740057B2 (en) | 2007-02-09 | 2007-12-28 | Single shell-pass or multiple shell-pass shell-and-tube heat exchanger with helical baffles |
| US12/764,702 US8540011B2 (en) | 2007-02-09 | 2010-04-21 | Shell-and-tube heat exchanger with helical baffles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100173956A CN100453951C (en) | 2007-02-09 | 2007-02-09 | Combined helix baffle plate shell-and-tube heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101013009A true CN101013009A (en) | 2007-08-08 |
| CN100453951C CN100453951C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100173956A Expired - Fee Related CN100453951C (en) | 2007-02-09 | 2007-02-09 | Combined helix baffle plate shell-and-tube heat exchanger |
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| DE102011118164C5 (en) | 2010-12-29 | 2018-08-30 | Thesys Gmbh | Heat exchanger and method for operating a heat exchanger |
| EP3676554B1 (en) | 2017-08-28 | 2023-06-14 | Watlow Electric Manufacturing Company | Continuous helical baffle heat exchanger |
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| JPS5912294A (en) * | 1982-07-12 | 1984-01-21 | Kamui Sangyo Kk | Production of multitubular-type heat exchanger |
| US6827138B1 (en) * | 2003-08-20 | 2004-12-07 | Abb Lummus Global Inc. | Heat exchanger |
| CN1283972C (en) * | 2003-10-17 | 2006-11-08 | 西安交通大学 | Shell-and-tube heat exchanger |
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| HUP0303606A2 (en) * | 2003-11-04 | 2005-10-28 | Ernő Nyakas | Heat exchanger and method for indirect heat exchanging |
| DE102005010261A1 (en) * | 2005-03-07 | 2006-09-21 | Robert Bosch Gmbh | Making heat exchanger for confectionery masses, prepares laser-cut non-circular segments to form spiral guide with elongated holes carrying parallel tubes |
| CN100365368C (en) * | 2005-08-01 | 2008-01-30 | 西安交通大学 | Continuous helical deflecting plate pipe and shell type heat exchanger |
| CN100386586C (en) * | 2006-03-20 | 2008-05-07 | 西安交通大学 | Multiple shell pass screw baffle pipe shell type heat exchanger |
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| CN104888487A (en) * | 2015-05-25 | 2015-09-09 | 常熟联邦化工股份有限公司 | Strong-heating heat exchanger and distillation system |
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| CN113405396A (en) * | 2021-06-18 | 2021-09-17 | 华中科技大学 | Continuous spiral baffling substrate, device for processing same and heat exchanger |
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