CN101329143A - Trisection ellipse spiral traverse baffle shell type heat exchanger - Google Patents

Trisection ellipse spiral traverse baffle shell type heat exchanger Download PDF

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Publication number
CN101329143A
CN101329143A CNA2008100209670A CN200810020967A CN101329143A CN 101329143 A CN101329143 A CN 101329143A CN A2008100209670 A CNA2008100209670 A CN A2008100209670A CN 200810020967 A CN200810020967 A CN 200810020967A CN 101329143 A CN101329143 A CN 101329143A
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CN
China
Prior art keywords
deflection plate
tube
traverse baffle
ellipse
shell
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Pending
Application number
CNA2008100209670A
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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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Publication date
Application filed by Southeast University filed Critical Southeast University
Priority to CNA2008100209670A priority Critical patent/CN101329143A/en
Publication of CN101329143A publication Critical patent/CN101329143A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a shell-and-tube heat exchanger that has spiral traverse baffles with the projection of one third of an ellipse, and relates to the shell-and-tube heat exchangers with spiral traverse baffles, in particular to the technical field of the shell-and-tube heat exchangers with tubes that are arranged in an upright triangle. Tube plates of the shell and tube heat exchanger are concentrically arranged and welded at the two ends of a cylindrical shell, each traverse baffle is obliquely arranged inside the cylindrical shell, and the projection of each traverse baffle occupies about one third of the cross-section circle of the cylindrical shell, each traverse baffle consists of one curved ellipse edge and two straight edges, wherein, one edge that is coincident with or parallel to the major semi-axis of a tangential ellipse of the traverse baffle is taken as a reference edge, which is parallel to the connecting line of tube orifice centers of the tubes that are arranged in the upright triangle and contained in the traverse baffle, the other edge is an oblique edge, the reference edge of one traverse baffle and the oblique edge of the other adjacent traverse baffle are connected end to end, and tube orifices on each traverse baffle are arranged correspondingly to tube orifices on the tube plate. The shell-and-tube heat exchanger with the spiral traverse baffles achieves the aim of high heat exchange efficiency and lowered loss of resistance force and is applicable to the upright triangle arrangement of the tubes.

Description

Trisection ellipse spiral traverse baffle shell type heat exchanger
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 abroad 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 trisection ellipse spiral traverse baffle shell type heat exchanger 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, the projection of every deflection plate occupy approximately cylindrical shell interior cross section circle 1/3rd, every deflection plate is made of a bent limit of ellipse and two straight flanges, wherein one overlaps with the semi-major axis of the tangent ellipse of this deflection plate or parallel straight flange is a true edge, and a pore line of centres of the equilateral triangle arrangement stringing that comprises of true edge and this deflection plate is parallel; Another is a hypotenuse; The true edge of every deflection plate and the position of hypotenuse are all in the interval naturally of tube bank; The true edge of a wherein deflection plate of adjacent two deflection plates and the hypotenuse of another piece deflection plate are end to end, and the pore on every deflection plate is corresponding one by one with the pore on the tube sheet.
Reasonablely be: the scallop of deflection plate of the present invention is stepped.
Reasonablely be: interconnective deflection plate of the present invention connects for the twin-feed spiral mode.
The shape of deflection plate of the present invention is the part that the formed ellipse of housing inner cylinder face is cut on the deflection plate plane of inclination, is made of a bent limit of ellipse and two straight flanges, and wherein a straight flange is a true edge, and another is a hypotenuse; The angle on deflection plate plane and tube sheet plane is an angle of inclination beta, and the projection of every deflection plate that is in tilted layout occupies 1/3rd of the interior cross section of cylindrical shell circle approximately; The true edge that makes every deflection plate overlaps with the semi-major axis of ellipse or is parallel, and to arrange the pore line of centres of stringing parallel with the equilateral triangle that this deflection plate comprises; True edge will be a bit larger tham 120 ° with the angle of hypotenuse with the different of angle of inclination beta; The position of true edge and hypotenuse is all in the interval naturally of tube bank; The true edge of a back plate of adjacent 2 deflection plates and the hypotenuse of last block of plate are end to end.The deflection plate of trisection ellipse spiral traverse baffle shell type heat exchanger also can not strictly be separated by trisection, but the principle of pressing trisection can adopt the stairstepping limit to adapt to the interval naturally of tube bank according to the separation nearby at interval naturally of tube bank arrangement with tube bank in case of necessity.Trisection ellipse spiral traverse baffle also can adopt the twin-feed spiral mode.When being used for the U type tube bank shell-and-tube heat exchanger of equilateral triangle arrangement stringing, the interval naturally that deflection plate is restrained by the U type can be divided into 2 120 ° of subregions and 2 60 ° of subregions, and they are arranged to the center symmetry, perhaps further are reduced to 2 180 ° of subregions.
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 drag losses.Because each deflection plate has covered whole fluid passages, and strong point spacing is constant, the position progressively changes, avoided that the flow dead of segmental baffle scheme and 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, arrange the scheme of pore for equilateral triangle, owing to be arranged in the position in round one third sector shaped district with three deflection plates of one deck, a pore line of centres of the equilateral triangle arrangement stringing that the true edge that can make every deflection plate all comprises with the tangent oval semi-major axis in this deflection plate plane and with this deflection plate is parallel, because the angle of true edge and circular section is an angle of inclination beta, the spacing of vertical each the pore line of centres of direction does not change therewith, pore spacing along this direction is then slightly amplified, need be divided by cos β, the angle of true edge and hypotenuse is the monotropic function of angle of inclination beta, and hypotenuse is also parallel with the pore line of centres of other direction, thus to the line of the location of pore on the inclination deflection plate and processing than being easier to.If certainly the pore arrangement can be designed to the trisection symmetric arrangement, then rule and just process and more simplify.Even reserve certain intervals and make the situation that can not be linked to be straight line naturally at interval of the tube bank that is distributed in two zones for needs, still can solve with the method for ladder broken line.
3, compare with 1/4th ellipses/sector shaped helical baffle plate, trisection ellipse spiral traverse baffle not only is fit to the scheme that equilateral triangle is arranged pore, and finish appointed task with deflection plate number still less, bring convenience for processing, the assembling of deflection plate, because equilateral triangle is arranged the overwhelming majority that the scheme of stringing accounts for shell-and-tube heat exchanger, the present invention program will effectively overcome before to spiral baffle heat exchanger because of the psychology of being afraid of difficulty that deflection plate pore location difficulty causes, promote its development and popularization and application greatly.
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 a deflection plate projection front view of the present invention.
Fig. 4 is the vertical view of deflection plate of the present invention.
Fig. 5 is that the A of Fig. 4 is to cutaway view.
Fig. 6 is the projection view that the deflection plate of the embodiment of the invention 2 is arranged in heat exchanger.
Fig. 7 is the projection view that the deflection plate of the embodiment of the invention 3 is arranged in heat exchanger.
The specific embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
Embodiment 1: shown in Fig. 1-5, 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 joints with tube sheet 3 again; Fluid inlet takes over 5, fluid issuing is taken over 6 and made things convenient for fluid to enter the even distribution behind the housing and conveniently compile fluid to be principle, to be 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, the projection of every deflection plate 4 occupy approximately cylindrical shell 1 interior cross section circle 1/3rd; Every deflection plate 4 is made of a bent limit of ellipse and two straight flanges, and wherein a straight flange is a true edge, and another is a hypotenuse; True edge overlaps with the semi-major axis of the tangent ellipse of this deflection plate or is parallel; The true edge of a wherein deflection plate of adjacent two deflection plates 4 and the hypotenuse of another piece deflection plate are oppositely arranged, and the pore on every deflection plate 4 is corresponding one by one with the pore on the tube sheet 3.
The shape of deflection plate 4 of the present invention is parts that the formed ellipse of housing inner cylinder face is cut on the deflection plate plane of inclination, the angle on deflection plate 4 planes and tube sheet 3 planes is an angle of inclination beta, and the projection of every deflection plate that is in tilted layout occupies 1/3rd of the interior cross section of housing circle approximately; The true edge that makes every deflection plate 4 overlaps with the semi-major axis of ellipse or is parallel, and parallel with a line of centres of each pore; True edge will be a bit larger tham 120 degree with the angle of another hypotenuse with the different of angle of inclination beta;
The position of true edge of the present invention and the position of hypotenuse are all in the interval naturally of tube bank; The hypotenuse of the true edge of a back plate of adjacent 2 deflection plates and last block of plate is end to end on perspective view.
Embodiment 2:
As shown in Figure 6, deflection plate 4 of the present invention also can not strictly be separated by trisection, but by the principle of trisection according to the tube bank arrangement with the separating nearby at interval naturally of tube bank, the straight flange of deflection plate 4 can adopt the stairstepping limit to adapt to the interval naturally of tube bank in case of necessity.For example need for arranging because of the multitube journey, leave at interval between some tube bank, thereby have the situation that can not be linked to be straight line naturally at interval of the tube bank that is distributed in two zones, can solve this moment according to the method with ladder broken line limit shown in Figure 6.
Embodiment 3:
As shown in Figure 7, the structure of present embodiment is applicable to the U type tube bank shell-and-tube heat exchanger of equilateral triangle arrangement stringing, this heat exchanger is mainly used in the high-temperature medium heat exchange, has less swelling heat stress, deflection plate is divided into 2 120 ° of subregions and 2 60 ° of subregions, and they are arranged to the center symmetry; Perhaps further be reduced to 2 180 ° of subregions.

Claims (3)

1, a kind of trisection ellipse spiral traverse baffle shell type heat exchanger, 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), two tube sheet (3) 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 (3) 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), the projection of every deflection plate (4) occupy approximately cylindrical shell (1) interior cross section circle 1/3rd; Every deflection plate (4) is made of a bent limit of ellipse and two straight flanges, wherein one overlaps with the semi-major axis of the tangent ellipse of this deflection plate or parallel straight flange is a true edge, and a pore line of centres of the equilateral triangle arrangement stringing that comprises of true edge and this deflection plate is parallel; Another is a hypotenuse; The true edge of every deflection plate (4) and the position of hypotenuse are all in the interval naturally of tube bank; The true edge of a wherein deflection plate of adjacent two deflection plates (4) and the hypotenuse of another piece deflection plate are end to end, and the pore on the every deflection plate (4) is corresponding one by one with pore on the tube sheet (3).
2, trisection ellipse spiral traverse baffle shell type heat exchanger according to claim 1 is characterized in that the limit of above-mentioned deflection plate (4) is stepped.
3, trisection ellipse spiral traverse baffle shell type heat exchanger according to claim 1 is characterized in that above-mentioned interconnective deflection plate (4) connects for the twin-feed spiral mode.
CNA2008100209670A 2008-08-01 2008-08-01 Trisection ellipse spiral traverse baffle shell type heat exchanger Pending CN101329143A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100209670A CN101329143A (en) 2008-08-01 2008-08-01 Trisection ellipse spiral traverse baffle shell type heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Cited By (6)

* 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
CN102878830A (en) * 2012-09-21 2013-01-16 淄博万昌化工设备有限公司 Shell-and-tube heat exchanger provided with blade type clapboards
CN103105075A (en) * 2013-01-24 2013-05-15 东南大学 U-shaped tubular condenser of vertical type spiral baffle plate
CN104154773A (en) * 2014-05-15 2014-11-19 东南大学常州研究院 Liquid removing device used outside water cooling type vertical condenser pipes
CN106288879A (en) * 2016-09-23 2017-01-04 佛山神威热交换器有限公司 A kind of spiral baffle heat exchanger
CN109579573A (en) * 2018-12-07 2019-04-05 西安交通大学 A kind of spiral lattice board shell-and-tube heat exchanger

Cited By (9)

* 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
CN102878830A (en) * 2012-09-21 2013-01-16 淄博万昌化工设备有限公司 Shell-and-tube heat exchanger provided with blade type clapboards
CN103105075A (en) * 2013-01-24 2013-05-15 东南大学 U-shaped tubular condenser of vertical type spiral baffle plate
CN103105075B (en) * 2013-01-24 2014-09-10 东南大学 U-shaped tubular condenser of vertical type spiral baffle plate
CN104154773A (en) * 2014-05-15 2014-11-19 东南大学常州研究院 Liquid removing device used outside water cooling type vertical condenser pipes
CN104154773B (en) * 2014-05-15 2016-04-06 东南大学常州研究院 For the liquid removing device outside the vertical condenser pipe of water-cooled
CN106288879A (en) * 2016-09-23 2017-01-04 佛山神威热交换器有限公司 A kind of spiral baffle heat exchanger
CN106288879B (en) * 2016-09-23 2018-05-08 佛山神威热交换器有限公司 A kind of spiral baffle heat exchanger
CN109579573A (en) * 2018-12-07 2019-04-05 西安交通大学 A kind of spiral lattice board shell-and-tube heat exchanger

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Open date: 20081224