CN2458587Y - Oval cross section tube heat exchanger - Google Patents
Oval cross section tube heat exchanger Download PDFInfo
- Publication number
- CN2458587Y CN2458587Y CN 00268640 CN00268640U CN2458587Y CN 2458587 Y CN2458587 Y CN 2458587Y CN 00268640 CN00268640 CN 00268640 CN 00268640 U CN00268640 U CN 00268640U CN 2458587 Y CN2458587 Y CN 2458587Y
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Abstract
The utility model relates to a cross oval cross section pipe heat exchanger which is composed of a cross oval cross section heat exchange pipe (1), a flow blocking support component (2), a pipe sheet, a casing and other components and parts of a conventional shell and pipe type heat exchanger. The utility model is a longitudinal flow high efficiency heat exchanger which has a new structure and uses 'inlet section effect' and eddy flow to strengthen heat transmission. The utility model has the advantages of good heat transmission strengthening effect, small flow resistance, high bearing pressure, small pipe bundle vibration, long service life, simple structure and wide application.
Description
The utility model relates to a kind of efficient shell-and-tube heat exchanger.
The development and application of various new type high efficient heat exchangers is in recent years paid attention to widely and is developed, in using, engineering occupies certain market share gradually as helicla flute deflection rod heat exchanger and corrugated tube heat exchanger etc., but all there is some deficiency in various degree in they, are difficult to promote widely.Only be applicable to the occasion of big flow as deflection rod heat exchanger, shell side logistics flow velocity has considerable influence to the shell side heat transfer coefficient, and being unwell to the shell side logistics is to use under the medium and small flow occasion; Bellows, waved tube heat exchanger generally adopt the thin-walled heat exchange element, owing to reasons such as generating collisions, make heat exchanger tube be easy to break, and have reduced safety in utilization, and its pressure-bearing is also lower, only are applied to the heat exchange of the water-Shui Heshui-vapour of low-temp low-pressure at present; Pipe interpolation spring or distortion band heat exchanger are easy to stop up, and it is excessive etc. that pressure falls.So the most widely used or traditional shell-and-tube heat exchanger.
The purpose of this utility model provides the vertical stream high-performance heat exchanger of a kind of new structure of a kind of utilization " entrance effect " and eddy current augmentation of heat transfer, characteristics such as it has, and augmentation of heat transfer is effective, flow resistance is little, pressure-bearing is high, tube bundle vibration is little, long service life, security is good and interchangeability is strong.
The purpose of this utility model is achieved in that to be utilized on the basic structure basis of conventional tube shell heat exchanger, adopt " cross elliptic-section heat exchange pipe " (ZL00136122.8) as heat exchange element, adopt the shelves stream bearing assembly supporting of several special constructions and fixing heat exchanger tube.The cross elliptic-section heat exchange of heat pipe is made up of other conventional shell-and-tube heat exchanger parts such as cross elliptic-section heat exchange pipe and shelves stream bearing assembly and tube sheet, housings, it is characterized in that using the cross elliptic-section pipe as heat exchanger tube, the major axis of the elliptic-section of its heat exchanger tube directly is less than or equal to the nominal tube center distance that heat exchanger tube is arranged in the tube bank; Use the shelves stream bearing assembly of versions such as circle type, grid rod baffle type, grid rod baffle type and profiled holes template, supporting and the intrafascicular elliptic-section heat exchange pipe of stationary pipes and prevent shell side logistics short circuit, shell side logistics under the effect of shelves stream bearing assembly in tube bank main do vertically mobile.Because cross elliptic-section heat exchange pipe is made up of the cross one another elliptic-section pipeline section of a plurality of axis and two terminal circle tee section pipeline section and changeover portion thereof, its tube wall occurs periodic transition shoulder at the changeover portion place along tube axis direction, make tube fluid when an elliptic-section pipeline section enters the elliptic-section pipeline section of another intersection, inducer effect (rate of flow of fluid is near mainstream speed) appears in the larger radius of curvature wall place at elliptic-section, and eddy current occurs at the small curvature radius wall place of elliptic-section, thereby make in its pipe the augmentation of heat transfer effect very remarkable.Because area of section is almost equal in the pipe of each cross elliptic-section pipeline section, and the actual internal area of changeover portion and heat exchange main body---the actual internal area of elliptic-section pipeline section is more or less the same, thereby its flow resistance is less.For shell-side fluid (vertical stream), mainly be the elliptic-section pipeline section that intersects segmentation produced be equivalent to manage in the wake flow (generation eddy current) that contacts or produce near the place of " entrance effect " of stream and tube wall and the acting in conjunction of shelves stream bearing assembly, logistics periodically separate with mixing make the heat exchange of extratubal fluid and wall strengthened preferably and the relative increase of flow resistance not quite.It is the flowing of complexity of principal character that this structure all produces with " entrance effect " and eddy current tube side logistics and shell side logistics, thereby has strengthened diabatic process largely.
The utility model compared with prior art has the following advantages:
(1) augmentation of heat transfer is effective, and flow resistance is less.The cross elliptic-section heat exchange of heat pipe is compared with the common tube shell heat exchanger, generally can improve 2 times of heat transfer coefficients even more for Laminar Flow, generally can improve heat transfer coefficient more than 30% for turbulent flow, the increment rate of its corresponding flow resistance is suitable with heat exchange enhancing rate, thereby has the important project actual application value.
(2) simple in structure, be easy to apply.The utility model adopts cross elliptic-section heat exchange pipe and several grades of stream bearing assemblies, all the other all adopt the basic structure form of traditional shell-and-tube heat exchanger, simple in structure being easy to realized, the entire infrastructure form that is suitable for the shell-and-tube heat exchanger of various pressure ranks and condition of different temperatures, comprise several versions described in the GB151 " steel tube shell type heat exchanger ", as floating head type, the shell-and-tube heat exchanger of versions such as U type tubular type and fixed tube sheet type, and the tube bank of the tube bank of cross elliptic-section heat exchange of heat pipe and conventional shell-and-tube heat exchanger has interchangeability, but thereby extensive use or alternative traditional heat exchangers, be easy to promote, cost is lower, particularly has more wide prospect in the reorganization and expansion of petrochemical equipment.
(3) long service life.Flow because the logistics of cross elliptic-section heat exchange of heat pipe shell side is essentially vertically, reduced bundle vibration significantly, greatly reduce possibility owing to inefficacies such as bundle vibration cause that heat exchanger tube breaks; " dead band " of also having eliminated shell side logistics lateral flow effectively simultaneously reduced fouling rate, thereby prolonged the service life of heat exchanger.
(4) the tube bank outside is easy to clean, and heat exchanger tube can extensively adopt equilateral triangle to arrange under certain condition in the tube bank, improves the heat exchange amount of heat transmission equipment unit volume/weight.Owing to adopted cross elliptic-section heat exchange pipe, make and form periodic local big space in the tube bank between pipe row, be convenient to restrain the cleaning in the outside, thereby for the heat exchanger that needs outside some tube banks regularly to clean, heat exchanger tube in its tube bank can extensively adopt equilateral triangle to arrange instead of square and arrange, under identical shell side diameter condition, can improve heat transfer area about 20%, thereby can further improve the heat exchange amount of heat transmission equipment unit volume/weight.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is that a kind of floating head type cross elliptic-section heat exchange of heat pipe structure is implemented legend, comprises other conventional heat exchanger parts such as cross elliptic-section heat exchange pipe (1) and circle type shelves stream bearing assembly (2) and housing, tube sheet.Fig. 2 is the M cross section view of this enforcement legend; Fig. 3 is the N cross section view of this enforcement legend.A and B are respectively the nominal major axis footpath and the minor axis of heat exchanger tube elliptic-section, the nominal pore centre-to-centre spacing that a arranges for heat exchanger tube in the tube bank among the figure.
Implement in the legend at this, heat exchanger tube selects for use the right-angled intersection elliptic-section heat exchange pipe of identical elliptic-section parameter nominal major axis footpath A and short shaft diameter B to arrange by square compact, and promptly Guan Shu heat exchanger tube is directly located to be in contact with one another at the major axis of each elliptic-section pipeline section.Shelves stream bearing assembly is then directly located to be in contact with one another at the major axis of elliptic-section with heat exchanger tube by its inner ring periphery, plays the effect of the free degree of supporting heat exchanger tube and restriction heat exchanger tube.Adjacent two grades of stream bearing assemblies are answered the free degree of the different directions of the intrafascicular heat exchanger tube of limiter tube.The embodiment of Fig. 1 is a floating head type basic structure form, also can realize U type tubular type, fixed tube sheet type basic structure form.The embodiment of Fig. 1 is two tube side monoshell journey structures, also can realize multitube journey muitishell structure.This embodiment for heat exchanger tube by square arrangement, can realize that also heat exchanger tube presses rounded projections arranged.This embodiment is the right-angled intersection elliptic-section heat exchange pipe, also can realize the elliptic-section heat exchange pipe of 60 ° of cross elliptic-section heat exchange pipes or other angle of the crossing, selecting the nominal angle of the crossing when being recommended in heat exchanger tube by square arrangement for use is 90 ° cross elliptic-section heat exchange pipe and to select the nominal angle of the crossing when heat exchanger tube is arranged by equilateral triangle for use be 60 ° cross elliptic-section heat exchange pipe.This embodiment arranges for the heat exchanger tube compact, also can realize the non-compact arrangement of heat exchanger tube.When non-compact is arranged, when gap between pipe should take during greater than certain numerical value to twine wire, cover short tube or heat exchanger tube is supported mutually measures such as heat exchanger tube part flattening outer the keeping at a certain distance away of pipe.
Fig. 4, Fig. 5, Fig. 6 and Fig. 7 are that the structure of several typical case's shelves stream bearing assemblies is implemented legend.
Fig. 4 is that the structure of circle type shelves stream bearing assembly is implemented legend.Circle type shelves stream bearing assembly is made up of shelves stream supporting cast plate (3) and tubular cast plate (4) etc., to be anti-stop stream supporting cast plate take out in the process of assembling distortion and wash away distortion down or vibration and tie up heat-exchanging tube bundle in the shell side logistics in tube bank in the effect of its tubular cast plate, under some occasion tubular cast plate can be set.Heat exchanger tube was arranged by square and equilateral triangle during circle type shelves stream bearing assembly was suitable for restraining.Shelves stream supporting cast plates (3) can directly be located to be in contact with one another at the major axis of elliptic-section with cross elliptic-section heat exchange pipe by its inner ring periphery, play the effect of the free degree of supporting heat exchanger tube and restriction heat exchanger tube.Work the time spent of doing of tying up heat-exchanging tube bundle at tubular cast plate (4), shelves stream supporting cast plates (3) can be ring shape or other structure, play supporting heat-exchanging tube bundle and the effect of shelves stream.A and B are respectively the nominal major axis footpath and the minor axis of heat exchanger tube elliptic-section, the nominal pore centre-to-centre spacing that a arranges for heat exchanger tube in the tube bank among the figure.Because heat exchanger tube exists bending and tube sheet pore centre-to-centre spacing to have foozle, should make A＜a have certain interval between managing during design.When gap between pipe should take during greater than certain numerical value to twine wire, cover short tube or heat exchanger tube is supported mutually measures such as heat exchanger tube part flattening outer the keeping at a certain distance away of pipe.
Fig. 5 is that the structure of grid rod baffle type shelves stream bearing assembly is implemented legend.Grid rod baffle type shelves stream bearing assembly is made up of the supporting of shelves stream cast plate (5), rod baffle/lath (6) and drag link sleeve (7) etc., can accept or reject according to different needs.Grid rod baffle type shelves stream bearing assembly is suitable for heat exchanger tube square arrangement and equilateral triangle arrangement in the tube bank.The diameter of rod baffle/lath or thickness δ≤a-B.Grid rod baffle type shelves stream bearing assembly is similar with the supporting principle of the rod baffle of disclosed deflection rod heat exchanger to the supporting principle of the heat exchanger tube of tube bank.To be anti-stop stream support plate take out in the process of assembling distortion and wash away distortion down or vibration and tie up heat-exchanging tube bundle etc. in the shell side logistics in tube bank in the effect of stiffening ring.A and B are respectively the nominal major axis footpath and the minor axis of heat exchanger tube elliptic-section among the figure, the nominal pore centre-to-centre spacing that a arranges for heat exchanger tube in the tube bank, and δ is the diameter or the thickness of rod baffle/lath.Implementing in the legend is continuous cloth rod baffle/lath, also can realize cloth rod baffle/lath at interval.
Fig. 6 is that the structure of grid rod baffle type shelves stream bearing assembly is implemented legend.Grid rod baffle type shelves stream bearing assembly is made up of the supporting of shelves stream cast plate (8), rod baffle/lath (9) and drag link sleeve (10) etc., can accept or reject according to different needs.Grid rod baffle type shelves stream bearing assembly is suitable for heat exchanger tube square arrangement in the tube bank.The diameter of rod baffle/lath or the selection of thickness should guarantee that heat exchanger tube can pass the grid hole of shelves stream bearing assembly, general δ≤0.8 (a-D), and D is the external diameter of the rolling parent tube of heat exchanger tube.To be anti-stop stream support plate take out in the process of assembling distortion and wash away distortion down or vibration and tie up heat-exchanging tube bundle etc. in the shell side logistics in tube bank in the effect of stiffening ring.A and B are respectively the nominal major axis footpath and the minor axis of heat exchanger tube elliptic-section among the figure, the nominal pore centre-to-centre spacing that a arranges for heat exchanger tube in the tube bank, and δ is the diameter or the thickness of rod baffle/lath.
Fig. 7 is that the structure of profiled holes template shelves stream bearing assembly is implemented legend.Being shaped as of profiled holes template shelves stream bearing assembly pore is non-circular, and as square, rectangle etc., its size should guarantee that heat exchanger tube can pass.A and B are respectively the nominal major axis footpath and the minor axis of heat exchanger tube elliptic-section, the nominal pore centre-to-centre spacing that a arranges for heat exchanger tube in the tube bank among the figure.
Above embodiment and description of drawings thereof, the utility model is made up of shelves stream bearing assembly and other conventional shell-and-tube heat exchanger parts (as: bobbin carriage, tube sheet, housing etc.) of cross elliptic-section heat exchange pipe and several special constructions.
The cross elliptic-section heat exchange pipe that the cross elliptic-section heat exchange of heat pipe uses can be low rib walls such as hydraulically smooth surface, screw thread and helicla flute, and concavo-convex tube wall face is or/and the coating wall.The nominal major axis footpath A of the elliptic-section of heat exchanger tube is less than or equal to the pore nominal centre-to-centre spacing a that the tube bank heat exchanger tube is arranged.Heat exchanger tube such as recommends to select for use at pitch and identical elliptic-section parameter major axis footpath A and short shaft diameter B, helps simplifying the manufacturing of heat exchanger like this.The circular smooth straight section length in the end of the heat exchanger tube that is connected with tube sheet should so both help the poling in the heat exchanger manufacture process more than the twice greater than tube plate thickness, also helped the change that the shell side logistics flows at the place, gateway simultaneously.
Shelves stream bearing assembly to be can supporting and elliptic-section heat exchange pipe that stationary pipes is intrafascicular and prevent that the gap short circuit of shell side logistics between tube bank and housing from being main feature, the shell side logistics under the effect of shelves stream bearing assembly in tube bank main the work vertically flow.Shelves stream bearing assembly also has adjusting shell side logistics flow velocity and changes the effect in shell side logistics flow field, and the selection of shelves stream bearing assembly should require to determine according to logistics flow velocity in engineering reality and the tube bank.The setting of restraining the spacing of middle-grade stream bearing assembly should make the free degree of the different directions of adjacent two grades of intrafascicular heat exchanger tubes of stream bearing assembly limiter tube, plays the effect of the intrafascicular heat exchanger tube of supporting and stationary pipes.Shelves stream bearing assembly has versions such as circle type, grid rod baffle type, grid rod baffle type and profiled holes template.With regard to easily manufactured economy, answer first-selected circle type, grid rod baffle type and grid rod baffle type shelves stream bearing assembly.
Heat exchanger tube in the tube bank can be the orderly arrangement of same cross section elliptic-section in the tube bank, also can be lack of alignment, recommends to select for use orderly arrangement mode.
The cross elliptic-section heat exchange of heat pipe adopts the basic structure of conventional tube shell heat exchanger, has simplified the structural design and the device fabrication of heat exchanger, helps substituting conventional tube shell-type baffle heat exchanger.The cross elliptic-section heat exchange of heat pipe is suitable for the entire infrastructure form of the shell-and-tube heat exchanger of various pressure ranks and condition of different temperatures, comprise several versions described in the GB151 " steel tube shell type heat exchanger ", as floating head type, U type tubular type and fixed tube sheet type etc., and the various numbers of tube passes and the number of shell passes of different structure form.
Claims (3)
1, cross elliptic-section heat exchange of heat pipe, form by other conventional shell-and-tube heat exchanger parts such as cross elliptic-section heat exchange pipe (1) and shelves stream bearing assembly (2) and tube sheet, housings, it is characterized in that using the cross elliptic-section pipe as heat exchange element, and the major axis of the elliptic-section of heat exchanger tube directly is less than or equal to the nominal tube center distance that heat exchanger tube is arranged in the tube bank; Use the shelves stream bearing assembly of versions such as circle type, grid rod baffle type, grid rod baffle type and profiled holes template, supporting and the intrafascicular cross elliptic-section heat exchange pipe of stationary pipes.
2, according to the described cross elliptic-section heat exchange of heat pipe of claim 1, it is characterized in that the cross elliptic-section heat exchange pipe that the cross elliptic-section heat exchange of heat pipe uses can be low ribbed pipe walls such as plain tube wall, screw thread and helicla flute, and concavo-convex tube wall face is or/and the coated pipe wall; The major axis of heat exchanger tube elliptic-section directly is less than or equal to the nominal tube center distance that heat exchanger tube in the tube bank is arranged, and pitch and identical elliptic-section parameter major axis footpath A and short shaft diameter B such as preferentially selects for use.
3, according to the described cross elliptic-section heat exchange of heat pipe of claim 1, it is characterized in that shelves stream bearing assembly has versions such as circle type, grid rod baffle type, grid rod baffle type and profiled holes template, preferentially select circle type, grid rod baffle type and grid rod baffle type shelves stream bearing assembly for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00268640 CN2458587Y (en) | 2000-12-31 | 2000-12-31 | Oval cross section tube heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00268640 CN2458587Y (en) | 2000-12-31 | 2000-12-31 | Oval cross section tube heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2458587Y true CN2458587Y (en) | 2001-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00268640 Expired - Fee Related CN2458587Y (en) | 2000-12-31 | 2000-12-31 | Oval cross section tube heat exchanger |
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| Country | Link |
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| CN (1) | CN2458587Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387756A (en) * | 2015-11-25 | 2016-03-09 | 重庆市龙山金属材料有限公司 | Improved heat exchange enhanced air conditioner |
| CN105387749A (en) * | 2015-11-25 | 2016-03-09 | 重庆祥吉机械制造有限公司 | Novel heat exchange enhanced floor heating system |
| CN105387751A (en) * | 2015-11-25 | 2016-03-09 | 重庆祥吉机械制造有限公司 | Novel heat exchange reinforcement water heater |
| CN105387747A (en) * | 2015-11-25 | 2016-03-09 | 重庆市龙山金属材料有限公司 | Cross oval section and round face heat exchange enhanced pipe |
| CN105466247A (en) * | 2015-11-26 | 2016-04-06 | 张家港市大新毛纺有限公司 | Waste water recycling equipment for printing and dyeing production |
| CN113486467A (en) * | 2021-07-12 | 2021-10-08 | 河南科技大学 | Heat exchanger tube bundle modeling method and computer readable storage medium |
-
2000
- 2000-12-31 CN CN 00268640 patent/CN2458587Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387756A (en) * | 2015-11-25 | 2016-03-09 | 重庆市龙山金属材料有限公司 | Improved heat exchange enhanced air conditioner |
| CN105387749A (en) * | 2015-11-25 | 2016-03-09 | 重庆祥吉机械制造有限公司 | Novel heat exchange enhanced floor heating system |
| CN105387751A (en) * | 2015-11-25 | 2016-03-09 | 重庆祥吉机械制造有限公司 | Novel heat exchange reinforcement water heater |
| CN105387747A (en) * | 2015-11-25 | 2016-03-09 | 重庆市龙山金属材料有限公司 | Cross oval section and round face heat exchange enhanced pipe |
| CN105466247A (en) * | 2015-11-26 | 2016-04-06 | 张家港市大新毛纺有限公司 | Waste water recycling equipment for printing and dyeing production |
| CN105466247B (en) * | 2015-11-26 | 2017-05-17 | 张家港市大新毛纺有限公司 | Waste water recycling equipment for printing and dyeing production |
| CN113486467A (en) * | 2021-07-12 | 2021-10-08 | 河南科技大学 | Heat exchanger tube bundle modeling method and computer readable storage medium |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |