CN101021394A - Combined multi-shell spiral baffle plate shell-and-tube heat exchanger - Google Patents
Combined multi-shell spiral baffle plate shell-and-tube heat exchanger Download PDFInfo
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- CN101021394A CN101021394A CN 200710017478 CN200710017478A CN101021394A CN 101021394 A CN101021394 A CN 101021394A CN 200710017478 CN200710017478 CN 200710017478 CN 200710017478 A CN200710017478 A CN 200710017478A CN 101021394 A CN101021394 A CN 101021394A
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Abstract
The invention relates to the combined multi-shell spiral baffle board shell-and-tube exchanger, which includes the shell. One end of the shell is set with the pipe side inlet and the pipe side outlet. The heat exchanging bundle is through the baffle board and connected to the two pipe boards in two ends of the shell. The first internal bushing is set in the shell and the second is set out of the first internal bushing. One end of the second internal bushing is connected to the pipe board and one end of the first internal bushing is set with the clapboard; the shell is installed with the inlet pipe of the out shell and the outlet pipe of the inner shell. The out shell and the middle shell use the whole continuously spiral baffle board; the inner shell uses the non continuously spiral baffle board or bow baffle board or disc-ring baffle board or baffle pole or the whole round baffle board or not setting the baffle board; the baffle board of every shell has the self anti dirty hole. The invention has simplified the process and decreased the pressure loss but increased the compaction and self anti-dirty ability of the heat exchanger; also it decreases the cleaning cost and prolongs the using life.
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, particularly a kind of combined multi-shell spiral baffle plate shell-and-tube heat exchanger.
Background technology
Heat exchanger is a kind of important unit in the industry such as petrochemical industry, energy source and power, metallurgy, refrigeration, desalinization, shell-and-tube heat exchanger most widely used general.In shell-and-tube heat exchanger, the effect of deflection plate be the more important thing is the flow direction that changes shell-side fluid except supporting heat-exchanging tube bundle, thus augmentation of heat transfer.
There are a lot of problems in tradition bow type deflection plate: 1. bow type deflection plate makes the tube bank of fluid vertical impact, causes bigger along the journey pressure drop; 2. deflection plate and shell wall side joint produce the stagnation dead band of flowing, and have reduced heat exchange efficiency, and easy incrustation; 3. exist leakage current between deflection plate and the shell wall side and between heat exchanger tube and the deflection plate, by-pass flow and leakage current have reduced the mass flow of effective cross-flow tube bank, have reduced the heat exchange efficiency of shell-side; 4. the horizontal heat-exchanging tube bundle of plunderring of fluid high-speed can be induced the vibration of heat exchanger tube, has shortened the life-span of heat exchanger.
Spiral baffle heat exchanger is that arrangement of baffles is become helicoid, 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 the fan-shaped dull and stereotyped discontinuous spiral baffle heat exchanger of forming approximate spiral camber of polylith, discontinuous helical baffles is continuous bridging type (seeing patent 99241930.1) or staggered helical (seeing patent 200320106763.1), and another kind of is the continuous helical deflecting plate heat exchanger (seeing patent 200510043033.5) that adopts the continuous helical curved surface.Studies show that, under the situation of identical tube side layout, identical housings range of flow, the maximum feature of existing monoshell pass spiral baffle heat exchanger is that the exchange capability of heat under the identical shell-side pressure drop is strong, its flow resistance is lower than traditional segmental baffle board heat exchangers, but exchange capability of heat is also low simultaneously, does not often reach user's requirement.In order to improve the shell-side heat exchange efficiency, existing patent has proposed the multi-shell spiral baffle plate shell-and-tube heat exchanger (seeing patent 200610041949.1) with continuous deflection plate.The shell side rate of flow of fluid is than the height of monoshell journey structure under same pipe number of passes, same traffic for the helix tube shell heat exchanger of muitishell, so the coefficient of heat transfer is also higher, thereby reaches the purpose that improves heat exchange efficiency.
Fan-shaped or oval-shaped flat board overlaps and forms discontinuous helical baffles mutually by some, and advantage is that processing is simple, and the center-pole location is generally adopted at the center, and the shared volume of center-pole is little, and shortcoming is that leakage current is bigger, influences heat exchange.Continuous helical deflecting plate is that the complete continuous helical deflecting plate overlap joint in a plurality of cycles forms, each cycle is a continuous helical curve panel, make and flow more near screw type, advantage is can reduce resistance and reduce leakage current, the heat exchange effect is better, shortcoming is when pitch is big, helicoid near the place, axis becomes precipitous, the processing of continuous helical face herein is difficulty comparatively, the general central tube that adopts adapts to the inboard helical structure of helicoid, but can't arrange heat exchanger tube on the position of central tube, has reduced the effective heat exchange area of heat exchanger relatively, and taken heat exchanger volume, reduced the compactness of heat exchanger.Existing spiral baffle heat exchanger can't possess the advantage of continuous helical deflecting plate and discontinuous helical baffles simultaneously.
In addition, heat exchanger shell-side incrustation also is under the lower situation of a difficult problem, the especially flow velocity of urgent need solution, and general industry is horizontal with the many employings of shell-and-tube heat exchanger, usually there is the problem of dirt deposition in the helical deflecting plate pipe and shell type heat exchanger bottom of horizontal positioned, seriously reduces heat exchange efficiency.
Summary of the invention
In order to overcome above-mentioned prior art deficiency, the purpose of this invention is to provide a kind of combined multi-shell spiral baffle plate shell-and-tube heat exchanger, outer shell side and middle shell side adopt complete continuous helical deflecting plate, inside spin adopts discontinuous deflection plate, and it can make outer shell side and middle shell-side fluid flow according to screw type as much as possible, reduces along the journey flow resistance, reduce leakage current, the space of shell side makes processing easier in making full use of again, makes heat exchanger structure compact more.In addition, be provided with from the antiscale hole, can solve the dirt deposition problem, improve heat exchange efficiency in the complete continuous helical deflecting plate of horizontally-mounted shell-and-tube heat exchanger position near housing bottom.
Technical scheme of the present invention is achieved in that a kind of combined multi-shell spiral baffle plate shell-and-tube heat exchanger, comprise housing, at housing one end pipe side-entrance and pipe side outlet are set, heat-exchanging tube bundle interts on the deflection plate and be connected on two tube sheets at housing two ends, coaxial first inner sleeve that is provided with in housing, first inner sleeve is outside equipped with second inner sleeve, second inner sleeve, one end is connected with tube sheet, first inner sleeve, one end is provided with dividing plate, be outer shell side between the housing and second inner sleeve, be middle shell side between first inner sleeve and second inner sleeve, in first inner sleeve is interior shell side, shell side inlet tube and interior shell side outlet outside on housing, being equipped with, the deflection plate of described outer shell side and middle shell side is that the complete continuous helical deflecting plate overlap joint in a plurality of cycles forms, each cycle is a continuous helical curve panel, and interior shell side is provided with the discontinuous deflection plate of polylith.
The discontinuous deflection plate of shell side is meant discontinuous helical baffles or segmental baffle or disk-disc and donut or rod baffle or full circle shape deflection plate in described.
Form the double-shell heat exchanger when only having first inner sleeve in the described heat exchanger, form the muitishell heat exchanger when having first inner sleeve, second inner sleeve and a plurality of inner sleeve.
The fluid flow direction conversion mutually of described outer shell side inlet tube and interior shell side outlet, corresponding outer shell side outlet and the interior shell side inlet tube of forming.
The discontinuous helical baffles of shell side is the spiral or staggered helical of overlap joint in described.
Described complete continuous helical deflecting plate and the discontinuous helical baffles of interior shell side are single-screw or many helical structures, and its spiral is left hand helix or right-handed helix.
Described deflection plate is provided with from the antiscale hole.
The present invention has the following advantages:
1, the present invention can reduce the pressure loss;
2, the present invention can simplified processing process;
3, the present invention can improve the compactedness of heat exchanger;
4, the present invention can improve heat exchanger from the antiscale ability, prolongs the cycle of cleaning dirt, can reduce the Fouling Cleaning expense, can reduce and shut down the number of times that cleans dirt, increases the service life, and what assurance was produced carries out smoothly.
The present invention improves the shell-side of multi-shell spiral baffle plate shell-and-tube heat exchanger, for three shell pass screw baffle pipe shell type heat exchangers, the deflection plate of outer shell side and middle shell side is that the complete continuous helical deflecting plate overlap joint in a plurality of cycles forms, each cycle is a continuous helical curve panel, the deflection plate of interior shell side is the discontinuous deflection plate of polylith, forms combined multi-shell spiral baffle plate shell-and-tube heat exchanger.It is mobile that this unitized exchanger can adopt the shell side zone of complete continuous helical deflecting plate to form screw type, can reduce leakage current, reduces vibration, reduces the pressure loss; Avoided the difficult minor diameter helicoid of processing simultaneously, discontinuous deflection plate has been installed at interior shell side.The discontinuous deflection plate of interior shell side adopts discontinuous helical baffles or segmental baffle or disk-disc and donut or rod baffle or full circle shape deflection plate, advantage is can simplified processing process, need not the mounting center pipe, can save the heat transfer space of heat exchanger shell pass, the heat exchanger tube of a greater number can be installed, improve the compactedness of heat exchanger.Less and the shell side length of inner sleeve diameter less when the heat exchanger shell pass fluid flow, interior shell side more in short-term, deflection plate is not set in interior shell side, only be provided with heat-exchanging tube bundle, fluid flow direction is parallel to heat-exchanging tube bundle, and its advantage is the processing technology of shell side in can simplifying.
Form the double-shell heat exchanger when only having first inner sleeve in the heat exchanger of the present invention, form the muitishell heat exchanger when having first inner sleeve, second inner sleeve and a plurality of inner sleeve.The definite of each inner sleeve diameter should guarantee that the fluid flow area of each shell side is close, guarantees that each shell side inner fluid speed is suitable.Require the shell-and-tube heat exchanger very high, that number of tube passes is more for heat exchange, can adopt the helix tube shell heat exchanger of muitishell structure to improve heat exchange efficiency, reduce the cost of heat transmission equipment.
The fluid flow direction conversion mutually of outer shell side inlet tube of the present invention and interior shell side outlet, form outer shell side outlet and interior shell side inlet tube, when the temperature difference of shell-side inlet fluid and environment during than the having a narrow range of temperature of shell-side outlet fluid and environment, can make the shell-side inlet fluid outer shell side of flowing through earlier, the interior shell side of flowing through again flows out housing at last; When the temperature difference of shell-side inlet fluid and environment is bigger than the temperature difference of shell-side outlet fluid and environment, can make the shell-side inlet fluid interior shell side of flowing through earlier, the outer shell side of flowing through again flows out housing at last.Advantage is to select liquid form neatly according to the production technology needs, and the temperature difference that guarantees outer shell side fluid and environment has a narrow range of temperature than interior shell-side fluid and environment, can reduce the insulation material cost like this.
The present invention adopts discontinuous helical baffles to be the spiral or staggered helical of overlap joint.Described helical baffles can adopt single-screw or many helical structures according to the needs of process, technological design.Helical baffles can adopt left hand helix or right-handed helix structure according to the needs that design is installed in housing.
For large-scale shell-and-tube heat exchanger, generally all adopt horizontal layout, be that axis is parallel to ground, the dirt of shell fluid deposits the heat exchanger bottom easily, easy-clear not, especially even more serious under the lower situation of housing flow velocity, therefore can be provided with from the antiscale hole in the overlap edge in adjacent two complete each cycles of continuous helical deflecting plate, close outer vortex edge.Shape from the antiscale hole can be cut into Delta Region, sector region, arc or rectangular area according to production technology.Circular arc side at segmental baffle also can be excised Delta Region, sector region or a rectangular area according to production technology, forms from the antiscale hole.Be arranged in the bottom of heat exchanger shell pass from the antiscale hole.Can prevent a large amount of dirt depositions like this in heat exchanger bottom, improve heat exchanger from the antiscale ability, thereby guarantee that heat exchanger has more stable heat exchange efficiency, prolong the cycle of cleaning dirt, reduce the Fouling Cleaning expense of heat exchanger, prolong service life of equipment, guarantee carrying out smoothly of production.For the cleaner operating mode of shell-side fluid working medium, heat exchanger can not be provided with from the antiscale hole.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a cross-sectional view of the present invention;
Fig. 3 is a muitishell spiral combined type deflection plate schematic diagram of the present invention;
Fig. 4 is muitishell spiral of the present invention and arc combined type deflection plate schematic diagram;
Fig. 5 is muitishell spiral of the present invention and disk-and-doughnut shape combined type deflection plate schematic diagram;
Fig. 6 is a shell-side fluid flow schematic diagram of the present invention.
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 multi-shell spiral baffle plate shell-and-tube heat exchanger of the present invention, with three shell pass screw baffle pipe shell type heat exchangers is example, this heat exchanger comprises housing 2, pipe side-entrance 13, pipe side outlet 12, heat-exchanging tube bundle 3 interts on the deflection plate and be connected on two tube sheets 1 at housing 2 two ends, first inner sleeve 10 and second inner sleeve 14 of separating each shell side, first inner sleeve, 10 1 ends are provided with dividing plate 4, housing 2 and 14 of second inner sleeves are outer shell side 17, first inner sleeve 10 and 14 of second inner sleeves are middle shell side 18, in first inner sleeve 10 is interior shell side 19, shell side inlet tube 8 and interior shell side outlet 9 outside on housing, being equipped with, outer shell side 17 and middle shell side 18 adopt complete continuous helical deflecting plate 6, and interior shell side 19 adopts discontinuous helical baffles 5, forms combined multi-shell spiral baffle plate shell-and-tube heat exchanger.The outer vortex edge of the complete continuous helical deflecting plate 6 of each piece is provided with leg-of-mutton from antiscale hole 7, is exactly in Delta Region of excision, outer vortex edge, and the Delta Region is arranged in the bottom of each shell side.
With reference to shown in Figure 2, combined multi-shell spiral baffle plate shell-and-tube heat exchanger of the present invention, with three shell pass screw baffle pipe shell type heat exchangers is example, outer shell side 17 and middle shell side 18 adopt complete continuous helical deflecting plate 6, interior shell side 19 adopts discontinuous helical baffles 5, forms combined multi-shell spiral baffle plate shell-and-tube heat exchanger.The outer vortex edge of the complete continuous helical deflecting plate 6 of each piece is provided with from antiscale hole 7, is exactly in Delta Region of excision, outer vortex edge, and the Delta Region is arranged in the bottom of each shell side.10 is first inner sleeve, and 14 is second inner sleeve.2 is housing.
With reference to shown in Figure 3, outer shell side 17 adopts complete continuous helical deflecting plate 6, and interior shell side 19 adopts discontinuous helical baffles 5.At the overlap edge of adjacent two complete continuous helical deflecting plates 6, near outer vortex edge excision rectangular area, form from antiscale hole 7, and will be arranged in the bottom of shell side from antiscale hole 7.10 is first inner sleeve.
With reference to shown in Figure 4, outer shell side 17 adopts complete continuous helical deflecting plate 6, and interior shell side 19 can all be installed segmental baffle 11.But this embodiment simplified processing process.The outer vortex edge of the complete continuous helical deflecting plate 6 of each piece is provided with leg-of-mutton from antiscale hole 7, and segmental baffle 11 is provided with leg-of-mutton from antiscale hole 7.10 is first inner sleeve.
With reference to shown in Figure 5, outer shell side 17 adopts complete continuous helical deflecting plate 6, and interior shell side 19 can be installed disk-and-doughnut deflection plate 20.But this embodiment simplified processing process.The outer vortex edge of the complete continuous helical deflecting plate 6 of each piece is provided with leg-of-mutton from antiscale hole 7, and the annulus of each piece disk-and-doughnut deflection plate 20 partly is provided with leg-of-mutton from antiscale hole 7.10 is first inner sleeve.
With reference to shown in Figure 6, housing 2 and 14 of second inner sleeves are outer shell side 17, first inner sleeve 10 and 14 of second inner sleeves are middle shell side 18, in first inner sleeve 10 is interior shell side 19, shell side inlet tube 15 and outer shell side outlet 16 on housing, being equipped with, shell side 19 in fluid is flow to by interior shell side inlet tube 15 flows to middle shell side 18 again, flow to outer shell side 17 then, flow out housing 2 by outer shell side outlet 16 at last.13 are the pipe side-entrance, and 12 are the pipe side outlet, and 1 is tube sheet.
Claims (7)
1, a kind of combined multi-shell spiral baffle plate shell-and-tube heat exchanger, comprise housing (2), at housing (2) one ends pipe side-entrance (13) and pipe side outlet (12) are set, heat-exchanging tube bundle (3) interts on the deflection plate and be connected on two tube sheets (1) at housing (2) two ends, coaxial first inner sleeve (10) that is provided with in housing (2), first inner sleeve (10) is outside equipped with second inner sleeve (14), second inner sleeve (14) one ends are connected with tube sheet (1), first inner sleeve (10) one ends are provided with dividing plate (4), be outer shell side (17) between housing (2) and second inner sleeve (14), be middle shell side (18) between first inner sleeve (10) and second inner sleeve (14), in first inner sleeve (10) is interior shell side (19), shell side inlet tube (8) and interior shell side outlet (9) outside on housing (2), being equipped with, it is characterized in that, the deflection plate of described outer shell side (17) and middle shell side (18) is that complete continuous helical deflecting plate (6) overlap joint in a plurality of cycles forms, each cycle is a continuous helical curve panel, and interior shell side (19) is provided with the discontinuous deflection plate of polylith.
2, combined multi-shell spiral baffle plate shell-and-tube heat exchanger according to claim 1, it is characterized in that the discontinuous deflection plate of described interior shell side (19) is discontinuous helical baffles (5) or segmental baffle (11) or disk one disc and donut (20) or rod baffle or full circle shape deflection plate.
3, combined multi-shell spiral baffle plate shell-and-tube heat exchanger according to claim 1, it is characterized in that, form the double-shell heat exchanger when only having first inner sleeve (10) in the described heat exchanger, form the muitishell heat exchanger when having first inner sleeve (10), second inner sleeve (14) or a plurality of inner sleeve.
4, combined multi-shell spiral baffle plate shell-and-tube heat exchanger according to claim 1, it is characterized in that, the fluid flow direction conversion mutually of described outer shell side inlet tube (8) and interior shell side outlet (9), corresponding outer shell side outlet (16) and the interior shell side inlet tube (15) of forming.
5, combined multi-shell spiral baffle plate shell-and-tube heat exchanger according to claim 1 and 2 is characterized in that, the described interior discontinuous helical baffles of shell side (5) is the spiral or staggered helical of overlap joint.
6, combined multi-shell spiral baffle plate shell-and-tube heat exchanger according to claim 1, it is characterized in that, described complete continuous helical deflecting plate (6) and the discontinuous helical baffles of interior shell side (5) are single-screw or many helical structures, and its spiral is left hand helix or right-handed helix.
7, combined multi-shell spiral baffle plate shell-and-tube heat exchanger according to claim 1 is characterized in that, described deflection plate is provided with from antiscale hole (7).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100174785A CN100434858C (en) | 2007-03-09 | 2007-03-09 | Combined multi-shell spiral 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 |
|---|---|---|---|
| CNB2007100174785A CN100434858C (en) | 2007-03-09 | 2007-03-09 | Combined multi-shell spiral baffle plate shell-and-tube heat exchanger |
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| Publication Number | Publication Date |
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| CN101021394A true CN101021394A (en) | 2007-08-22 |
| CN100434858C CN100434858C (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100174785A Expired - Fee Related CN100434858C (en) | 2007-02-09 | 2007-03-09 | Combined multi-shell spiral baffle plate shell-and-tube heat exchanger |
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| CN101566437B (en) * | 2008-04-26 | 2013-07-10 | 赵文阁 | Composite sleeve double-helix heat exchanger |
| CN102313467A (en) * | 2010-07-06 | 2012-01-11 | 路辉 | Totally-closed flow-channel continuous-type centerless-pipe spiral baffle-plate heat-exchanger |
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| CN103486882A (en) * | 2013-09-26 | 2014-01-01 | 上海锅炉厂有限公司 | Temperature-controllable floating head heat exchanger with disc and loop type baffling plates |
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| CN107782174A (en) * | 2016-08-31 | 2018-03-09 | 黄石市高耐斯热工设备有限公司 | A kind of new Spiral baffle tubular heat exchanger |
| CN106767109A (en) * | 2017-01-18 | 2017-05-31 | 中海石油(中国)有限公司 | A kind of uniform fluid distribution guiding device and the wrap-round tubular heat exchanger with the device |
| CN106767109B (en) * | 2017-01-18 | 2024-04-26 | 中国海洋石油集团有限公司 | Fluid uniform distribution guiding device and winding tube type heat exchanger with same |
| CN109595970A (en) * | 2018-12-28 | 2019-04-09 | 滨州中科催化技术有限公司 | Helical baffles and heat exchanger |
| CN110906761A (en) * | 2019-11-27 | 2020-03-24 | 无锡海悦生化装备有限公司 | Discontinuous spiral baffle heat exchanger for cooling compressed air |
| CN111664730A (en) * | 2020-06-08 | 2020-09-15 | 青岛畅隆电力设备有限公司 | Spiral baffle plate heat exchanger with variable-pitch spiral fluted pipe |
| CN111664730B (en) * | 2020-06-08 | 2021-11-30 | 青岛畅隆电力设备有限公司 | Spiral baffle plate heat exchanger with variable-pitch spiral fluted pipe |
| CN113883929A (en) * | 2021-09-28 | 2022-01-04 | 浙江搏克换热科技有限公司 | Heat exchange equipment of intelligence temperature monitoring |
| CN113883929B (en) * | 2021-09-28 | 2023-10-17 | 浙江搏克换热科技有限公司 | Heat exchange equipment of intelligent temperature monitoring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100434858C (en) | 2008-11-19 |
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