CN101403576A - Shell type heat exchanger for one third sector shaped helical baffle plate - Google Patents

Shell type heat exchanger for one third sector shaped helical baffle plate Download PDF

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Publication number
CN101403576A
CN101403576A CNA2008101952162A CN200810195216A CN101403576A CN 101403576 A CN101403576 A CN 101403576A CN A2008101952162 A CNA2008101952162 A CN A2008101952162A CN 200810195216 A CN200810195216 A CN 200810195216A CN 101403576 A CN101403576 A CN 101403576A
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CN
China
Prior art keywords
deflection plate
tube sheet
baffle plate
tube
heat exchanger
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2008101952162A
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Chinese (zh)
Inventor
陈亚平
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Southeast University
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Southeast University
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Filing date
Publication date
Application filed by Southeast University filed Critical Southeast University
Priority to CNA2008101952162A priority Critical patent/CN101403576A/en
Publication of CN101403576A publication Critical patent/CN101403576A/en
Pending legal-status Critical Current

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Abstract

A tubular heat exchanger with a trisection sector helix baffle plate relates to the technical field of tubular heat exchangers with helix baffle plates which are arranged for tubes in a regular triangle. Tube plates are concentrically arranged and welded at two ends of a cylindrical shell. The tube plate is divided into three pieces of trisection zones for symmetrically arranging tubes. A plurality of baffle plates are sequentially and obliquely arranged inside the cylindrical shell. Every baffle plate is composed of an oval-shaped curved edge and two straight edges which are symmetric to the semi minor axis of the oval, wherein, the two straight edges are respectively positioned in the natural intervals of the tube bundles. The semi minor axis of the oval which is tangent to the baffle plate is taken as the base line of the baffle plate. The base line is vertical to the axes of the shell and superposed with a central line of pores of tubes arranged in a positive triangle included in the baffle plate, and the front edge of the back baffle plate in two neighboring baffle plates is connected with the back edge of the front baffle plate. The tubular heat exchanger realizes high heat exchange efficiency, reduces the resistance loss and is suitable for the tubes arranged in the positive triangle.

Description

A kind of shell type heat exchanger for one third sector shaped helical baffle plate
Technical field
The present invention relates to helical deflecting plate pipe and shell type heat exchanger, relate in particular to the technical field of the shell-and-tube heat exchanger of positive triangle arrangement stringing.
Background technology
Shell-and-tube heat exchanger is simple in structure because of it, bears the main flow pattern that the high characteristics of pressure still are heat-exchange apparatus.Though segmental baffle form processing and manufacturing commonly used is simple, has flow dead, flow resistance is bigger, and it is bigger in indentation, there tube bundle support span, shortcomings such as easy induced vibration destruction, thereby expedite the emergence of many new tube bundle support schemes, helical baffles is exactly one of them.Theoretic helical baffles is a curved surface, is difficult to make, existing at present 1/4 ellipse/sector shaped helical baffle plate improvement project, and every layer of deflection plate is made up of 4 1/4 ellipse/segmental baffles, and headtotail can be formed the shell-side helical duct.Because what use in a large number in the shell-and-tube heat exchanger is the tube bank that the compactest equilateral triangle is arranged, and this just causes bigger difficulty to the line location at the enterprising line tilt pore of 1/4 ellipse/segmental baffle, has influenced the popularization and application of this type deflection plate.
Summary of the invention
The object of the invention provides a kind of heat exchange efficiency height, reduces drag losses, is suitable for the shell type heat exchanger for one third sector shaped helical baffle plate that equilateral triangle is arranged stringing.
The present invention adopts following technical scheme for achieving the above object:
The present invention includes cylindrical shell, tube bank, left tube sheet, right tube sheet, fluid inlet adapter, fluid issuing adapter, two tube sheet arranged concentric also are welded on the two ends of cylindrical shell, every pipe of tube bank all penetrates from an end tube sheet, stretch out from right tube sheet, the pipe end of each pipe all welds or expanded joint with tube sheet again; Fluid inlet is taken over, fluid issuing is taken over the side, two ends that is arranged in cylindrical shell; It is characterized in that: also comprise some deflection plates, every deflection plate is in tilted layout in cylindrical shell, every deflection plate is made of bent limit and two straight flanges that are symmetrical in oval semi-minor axis of a tangent ellipse of this deflection plate, / 3rd, two straight flanges that the projection of every deflection plate occupies the interior cross section circle of cylindrical shell approximately lay respectively in the interval naturally of tube bank; Semi-minor axis with the tangent ellipse of this deflection plate is a datum line, datum line and housing axis normal, and the pore line of centres that the equilateral triangle that comprises with this deflection plate is arranged stringing overlaps; Article two, straight flange is also respectively parallel with the pore line of centres of other direction; Every deflection plate is that axle tilts with the datum line; The preceding rim of a back deflection plate of adjacent two deflection plates and the back rim of last deflection plate are end to end in the deflection plate outer ring, divide three sector corresponding trisection symmetrical regions shared with each deflection plate on tube sheet, the pore of respective regions is corresponding one by one on the pore on every deflection plate and the tube sheet.
Reasonablely be: the present invention can utilize at the interval between the trisection symmetrical region of dividing on the tube sheet and in the end socket of heat exchanger two ends demarcation strip is set, and forms three tube sides and flows.
The shape of segmental baffle of the present invention is real to be elliptic sector, and two straight flanges are symmetrical in oval semi-minor axis (datum line), equal in length, and two straight flanges equate with the angle of datum line; Article two, the angle of straight flange will be a bit larger tham 120 ° with the difference of angle of inclination beta; The preceding rim of a back deflection plate of adjacent two deflection plates and the back rim of last deflection plate are end to end in the deflection plate outer ring, should have overlapping on a small quantity, overlapping surplus is a principle conveniently to hole and not interfere adjacent tube bank, and the reverse leakage current that overlapping surplus helps reducing the adjacent baffle junction is set.
The present invention adopts technique scheme, compared with prior art has following advantage:
1, shell fluid becomes the helical flow of this programme by snakelike the flowing of segmental baffle scheme.The former flow direction constantly changes, and causing does not have the local resistance loss of contribution to conducting heat, and the latter's flow direction is constant substantially, does not have extra local resistance loss.Because each deflection plate has covered whole fluid passages, and the tube bundle support dot spacing is constant, the Support Position progressively changes, avoided that the flow dead of segmental baffle scheme and indentation, there part tube bundle support span are excessive to be easy to generate resonance and to cause the problem of flutter failure, make this programme not only heat transfer efficiency improve, flow resistance reduces, and strength condition improves.For the bigger occasion of shell-side volumetric flow rate, can adopt the twin-feed spiral deflection plate, to reduce a layer distance, dwindle the support interval of tube bank.
2, stringing design of the present invention is earlier by stringing behind the trisection separated region, the battalion of respectively doing for oneself is arranged in tube bank in the zone, therefore design more convenient, realize the symmetry of deflection plate shape and stringing easily, but adjacent area tube bank this moment Rankine-Hugoniot relations each other will be become the in-line arrangement of intersection by the fork row of intra-zone.
3, because each deflection plate is the axle inclination with the datum line, size with the datum line parallel direction on the deflection plate does not change, then slightly amplify with the pore spacing dimension of datum line vertical direction, need be divided by cos β, article two, the angle of right-angle side is the monotropic function of angle of inclination beta, so the blanking of one third sector shaped deflection plate and deflection plate are tilted the location line processing of pore still than being easier to realize.
4, utilization is provided with demarcation strip at the interval between the trisection symmetrical region of dividing on the tube sheet in the end socket of heat exchanger two ends, also can form three tube sides and flow.Three tube sides flow and not only can improve the flow velocity of tube fluid, and comparable even number tube side flows more near countercurrent heat-transfer.Compare with three fens sector shaped helical baffle plate heat exchangers of the inequilateral that is suitable for evenly distributed stringing, because the symmetry of two straight flanges brings convenience for line, processing, the assembling of deflection plate.Therefore, for the spiral baffle heat exchanger that can adopt the subregion stringing, the present invention program has better flexibility.The tube bank aligning method of subregion stringing can be applicable to the trisection ellipse spiral traverse baffle heat exchanger too.
Description of drawings
Fig. 1 is a kind of perspective view of the present invention.
Fig. 2 is the end to end layout schematic perspective view of deflection plate of the present invention.
Fig. 3 is the projection view that the deflection plate of the embodiment of the invention is arranged in heat exchanger.
Fig. 4 is a deflection plate projection front view of the present invention.
Fig. 5 is the vertical view of deflection plate of the present invention.
Fig. 6 is that the A of Fig. 5 is to view.
The specific embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
Embodiment: shown in Fig. 1-6, the present invention includes cylindrical shell 1, tube bank 2, left tube sheet 31, right tube sheet 32, fluid inlet adapter 5, fluid issuing adapter 6, left side tube sheet 31, right tube sheet 32 arranged concentric also are welded on the two ends of cylindrical shell 1, every pipe of tube bank 2 all penetrates from left tube sheet 31, stretch out from right tube sheet 32, the pipe end of each pipe all welds or expanded joint with tube sheet again; Fluid inlet takes over 5, to take over 6 be principle to make things convenient for fluid to enter the even distribution behind the housing and conveniently compile fluid to fluid issuing, is arranged in the two ends lateral location of cylindrical shell 1; Also comprise some deflection plates 4, every deflection plate 4 is in tilted layout in cylindrical shell 1, every deflection plate 4 is made of a bent limit of ellipse and two straight flanges that are symmetrical in oval semi-minor axis, the projection of every deflection plate 4 occupy approximately cylindrical shell 1 interior cross section circle 1/3rd; Article two, straight flange lays respectively in the interval naturally of tube bank; Semi-minor axis with the tangent ellipse of this deflection plate is a datum line, datum line and housing axis normal, and the pore line of centres that the equilateral triangle that comprises with this deflection plate is arranged stringing overlaps; Article two, straight flange is also respectively parallel with the pore line of centres of other direction; Every deflection plate is that axle tilts with the datum line; The preceding rim of a back deflection plate of adjacent two deflection plates 4 and the back rim of last deflection plate are end to end in the deflection plate outer ring, divide three sector corresponding trisection symmetrical regions shared with each deflection plate on tube sheet, each regional pore is corresponding one by one on the pore on every deflection plate 4 and the tube sheet.If utilize and in the end socket of heat exchanger two ends, demarcation strip is set, can form three tube sides and flow at the interval between the trisection symmetrical region of dividing on the tube sheet.

Claims (2)

1, a kind of shell type heat exchanger for one third sector shaped helical baffle plate, comprise that cylindrical shell (1), tube bank (2), left tube sheet (31), right tube sheet (32), fluid inlet are taken over (5), fluid issuing is taken over (6), left side tube sheet (31), right tube sheet (32) arranged concentric also is welded on the two ends of cylindrical shell (1), every pipe of tube bank (2) all penetrates from left tube sheet (31), stretch out from right tube sheet (32), the pipe end of each pipe all welds or expanded joint with tube sheet again; Fluid inlet is taken over (5), fluid issuing is taken over the side, two ends that (6) are arranged in cylindrical shell (1); It is characterized in that: also comprise some deflection plates (4), every deflection plate (4) is in tilted layout in cylindrical shell (1), every deflection plate (4) is made of bent limit and two straight flanges that are symmetrical in oval semi-minor axis of a tangent ellipse of this deflection plate, the projection of every deflection plate (4) occupy approximately cylindrical shell (1) interior cross section circle 1/3rd; Article two, straight flange lays respectively in the interval naturally of tube bank; Semi-minor axis with the tangent ellipse of this deflection plate is a datum line, datum line and housing axis normal, and the pore line of centres that the equilateral triangle that comprises with this deflection plate is arranged stringing overlaps; Article two, straight flange is also respectively parallel with the pore line of centres of other direction; Every deflection plate is that axle tilts with the datum line; The preceding rim of a back deflection plate of adjacent two deflection plates (4) and the back rim of last deflection plate are end to end in the deflection plate outer ring; Divide three sector corresponding trisection symmetrical regions shared with each deflection plate on tube sheet, the pore of respective regions is corresponding one by one on the pore on the every deflection plate (4) and the tube sheet.
2, shell type heat exchanger for one third sector shaped helical baffle plate according to claim 1, in the interval between the trisection symmetrical region that it is characterized in that on tube sheet, dividing demarcation strip is set, described demarcation strip is arranged in the end socket of heat exchanger two ends, forms three tube sides and flows.
CNA2008101952162A 2008-11-07 2008-11-07 Shell type heat exchanger for one third sector shaped helical baffle plate Pending CN101403576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008101952162A CN101403576A (en) 2008-11-07 2008-11-07 Shell type heat exchanger for one third sector shaped helical baffle plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008101952162A CN101403576A (en) 2008-11-07 2008-11-07 Shell type heat exchanger for one third sector shaped helical baffle plate

Publications (1)

Publication Number Publication Date
CN101403576A true CN101403576A (en) 2009-04-08

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CNA2008101952162A Pending CN101403576A (en) 2008-11-07 2008-11-07 Shell type heat exchanger for one third sector shaped helical baffle plate

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CN (1) CN101403576A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102528295A (en) * 2012-03-02 2012-07-04 东南大学 Method for processing fan-shaped baffle plate of spiral baffle heat exchanger
CN110332832A (en) * 2019-06-10 2019-10-15 大连理工大学 A kind of bending 3 divides spiral baffle heat exchanger
CN114440695A (en) * 2022-04-02 2022-05-06 潍坊金健钛设备有限公司 Improved structure of heat exchanger baffle plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102528295A (en) * 2012-03-02 2012-07-04 东南大学 Method for processing fan-shaped baffle plate of spiral baffle heat exchanger
CN110332832A (en) * 2019-06-10 2019-10-15 大连理工大学 A kind of bending 3 divides spiral baffle heat exchanger
CN114440695A (en) * 2022-04-02 2022-05-06 潍坊金健钛设备有限公司 Improved structure of heat exchanger baffle plate

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Open date: 20090408