CN102671399B - Reboiler - Google Patents
Reboiler Download PDFInfo
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- CN102671399B CN102671399B CN201210162319.5A CN201210162319A CN102671399B CN 102671399 B CN102671399 B CN 102671399B CN 201210162319 A CN201210162319 A CN 201210162319A CN 102671399 B CN102671399 B CN 102671399B
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- reboiler
- heat exchanger
- longitudinal fluting
- exchanger tube
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Abstract
The invention discloses a reboiler which comprises a cylinder and a plurality of heat exchange tubes, wherein a material inlet and a material outlet are arranged at two ends of the cylinder respectively; a steam inlet is arranged on the cylinder on the side of the material outlet; and a condensate outlet is arranged on the cylinder on the side of the material inlet. According to the reboiler, a porous layer is processed on inner surfaces of heat exchange tube substrates and the porous layer has a heating surface with increased roughness so as to form an artificial evaporating core, so that the heat transfer efficiency of the heat exchange tubes is increased. Meanwhile, longitudinal grooves are processed on the outer surfaces of the heat exchange tube substrates, circular bulges are arranged in the longitudinal grooves, longitudinal nicks are arranged on a teeth part, the thickness of a liquid film is reduced by utilizing a surface tension and then the condensation effect on the exteriors of the heat exchange tubes is improved. According to the invention, the total coefficient of heat transfer of the reboiler is above 3 times of that of a light tube reboiler; anti-scaling capacity of boiling sides of the heat exchange tubes is increased; the dirt deposition rate is less than that of a smooth tube, so that the cleaning period of the reboiler is prolonged.
Description
Technical field
The present invention relates to a kind of reboiler.
Background technology
Reboiler is the class heat exchanger for the tower bottom product of vaporizing, and is widely used in the industries such as oil, chemical industry, cryogenic refrigeration, power, the energy.The heat-exchanging tube bundle of reboiler adopts plain tube conventionally, and this kind of reboiler is called light pipe reboiler.The heat exchange efficiency of the heat exchanger tube of light pipe reboiler is low, and heat transfer process is many to the consumption of power and material, and the easy fouling of heat exchanger tube boiling lateral, when layer of scale is more and more thicker, can cause production efficiency further to reduce, and even causes stopping production accident.
Summary of the invention
The present invention has designed and developed a kind of reboiler.In the present invention, processed porous layer at the inner surface of the heat exchanger tube matrix of reboiler, porous layer, by increasing the roughness of heating surface, has been manufactured the artificial nucleus of boiling, thereby improves the heat transfer efficiency of heat exchanger tube; Meanwhile, process longitudinal fluting at the outer surface of heat exchanger tube matrix, longitudinal fluting inside has circular projection, and is also provided with longitudinal indentation in tooth portion, utilizes surface tension attenuate condensate film thickness, has improved the outside condensation effect of heat exchanger tube.The present invention has improved the boiling heat transfer of shell side and the condensation heat transfer of tube side simultaneously, make the overall heat-transfer coefficient of reboiler of the present invention can reach the more than 3 times of light pipe reboiler, and the ant-scaling ability of heat exchanger tube boiling lateral is improved, dirt deposition speed, much smaller than plain tube, has extended the cleaning frequency of reboiler.
Technical scheme provided by the invention is:
A kind of reboiler, comprising:
Cylindrical shell, the two ends of described cylindrical shell have respectively material inlet and material outlet, and described cylindrical shell also has steam inlet in a side of described material outlet, and have condensate outlet in described material inlet one side;
Many heat exchanger tubes, described many heat exchanger tubes are arranged side by side in described cylindrical shell, wherein, described heat exchanger tube includes matrix and porous layer, described porous layer is positioned at the inner surface of described matrix, the thickness of described porous layer is 0.1 ~ 0.5mm, porosity is 30 ~ 60%, the outer surface of the mid portion of described matrix is equipped with multiple longitudinal flutings and multiple tooth portion, described longitudinal fluting and described tooth portion interval arrange, the inner surface of described longitudinal fluting is evenly equipped with circular projection, the cross section of described longitudinal fluting is trapezoidal, and the bottom of described longitudinal fluting is the trapezoidal long end, the degree of depth of described longitudinal fluting is 0.5 ~ 1.5mm, groove center distance is 2 ~ 3mm, the cross section of described tooth portion is inverted trapezoidal, the surface of described tooth portion has many longitudinal indentations, the outer surface of two ends of described matrix is smooth surface.
Preferably, in described reboiler, the surface of described tooth portion is equipped with many longitudinal indentations, and the degree of depth of described longitudinal indentation is 0.1 ~ 0.15mm.
Preferably, in described reboiler, the connecting portion between bottom and the sidepiece of described longitudinal fluting is circular-arc, and the radius of curvature of connecting portion between bottom and the sidepiece of described longitudinal fluting is 0.1 ~ 0.2mm.
Preferably, in described reboiler, the connecting portion between described longitudinal fluting and described tooth portion is circular-arc, and the radius of curvature of connecting portion between described longitudinal fluting and described tooth portion is 0.1 ~ 0.2mm.
Preferably, in described reboiler, the rough aperture of described porous layer for adopting aluminium powder, iron powder or copper powder sintering or soldering to form on the inner surface of the matrix of described heat exchanger tube.
Preferably, in described reboiler, the external diameter of described heat exchanger tube is 19 ~ 57mm.
Preferably, in described reboiler, the thickness of described heat exchanger tube matrix is 2 ~ 5mm.
Preferably, described reboiler, also comprises:
Multiple mount pads, it is with respect to the outer surface that is circumferentially distributed in described cylindrical shell of described cylindrical shell.
Reboiler of the present invention has following beneficial effect:
(1) porous layer can significantly improve the boiling heat transfer effect of heat exchanger tube, and its boiling heat transfer coefficient can reach 3 ~ 10 times of smooth surface, and it is more than 2 times that critical heat flux density is smooth surface; And the scale inhibition ability of porous layer is strong, there is the dirt deposition speed of heat exchanger tube of porous layer much smaller than plain tube, extend the cleaning frequency of reboiler.
(2) outer surface of heat exchanger tube matrix is provided with longitudinal fluting, and longitudinal fluting inside has circular projection, in tooth portion, there is longitudinal indentation, utilize surface tension attenuate condensate film thickness, can significantly improve the condensation heat transfer effect of heat exchanger tube, the surperficial condensation coefficient with longitudinal fluting and longitudinal indentation can reach 3 ~ 6 times of smooth surface.
(3) overall heat-transfer coefficient of reboiler of the present invention can reach the more than 3 times of light pipe reboiler, required heat transfer temperature difference is only 1/2 ~ 1/10 of light pipe reboiler, required heat exchange area is only 40% ~ 60% of light pipe reboiler, reduce the volume of reboiler, can significantly reduce operating cost and the manufacturing cost of reboiler.
(4) reboiler of the present invention adopts vertical version, and this structure is conducive to boiling in ducts and remains nucleate boiling or circulation state, boiling heat transfer coefficient maximum at this moment; The structure of the outer surface of heat exchanger tube matrix of the present invention is extremely suitable for vertical reboiler, can drain rapidly condensate liquid, further reduces thickness of liquid film, improves condensation coefficient.
Brief description of the drawings
Fig. 1 is the structural representation of reboiler of the present invention.
Fig. 2 is the structural representation of the heat exchanger tube of reboiler of the present invention.
Fig. 3 is the A-A cross section view of Fig. 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to description word.
As shown in Figure 1, Figure 2 and Figure 3, the invention provides a kind of reboiler, comprising: cylindrical shell 6, the two ends of described cylindrical shell have respectively material inlet and material outlet, and described cylindrical shell also has steam inlet in a side of described material outlet, and there is condensate outlet in described material inlet one side, many heat exchanger tubes, described many heat exchanger tubes are arranged side by side in described cylindrical shell, wherein, described heat exchanger tube includes matrix and porous layer, described porous layer is positioned at the inner surface of described matrix, the thickness of described porous layer is 0.1 ~ 0.5mm, porosity is 30 ~ 60%, the outer surface of the mid portion of described matrix is equipped with multiple longitudinal flutings 82 and multiple tooth portion 81, described longitudinal fluting 82 and described tooth portion 81 intervals arrange, and the inner surface of described longitudinal fluting 82 is evenly equipped with circular projection 825, the cross section of described longitudinal fluting 82 is trapezoidal, and the bottom 822 of described longitudinal fluting is the trapezoidal long end, the degree of depth h of described longitudinal fluting 82 is 0.5 ~ 1.5mm, groove center is 2 ~ 3mm apart from d, the cross section of described tooth portion 81 is inverted trapezoidal, the surface of described tooth portion has many longitudinal indentations, the outer surface of two ends of described matrix is smooth surface.
In the present invention, the thickness t of porous layer is 0.1 ~ 0.5mm, and porosity is 30 ~ 60%.Because porous layer is in order to manufacture artificially a large amount of nucleus of boiling, the in the situation that of above-mentioned thickness and porosity, can obtain good boiling heat transfer effect.
In the present invention, the degree of depth h of longitudinal fluting is 0.5 ~ 1.5mm, and groove center is 2 ~ 3mm apart from d.Longitudinal fluting oversize, just limited for the improvement of the situation of the outer surface of heat exchanger tube matrix, be unfavorable for attenuate condensate film thickness; Also can have influence on the intensity of heat exchanger tube, affect the service life of heat exchanger tube simultaneously.
The cross section of longitudinal fluting is set to trapezoidal, and the bottom correspondence of longitudinal fluting the trapezoidal long end, the opening part correspondence of longitudinal fluting trapezoidal shorter base, that is to say, longitudinal fluting is in inside for steam provides larger attaching space, and steam fully contacts with heat exchanger tube, has also increased the cross section of longitudinal fluting simultaneously, be conducive to drain condensate liquid, ensured heat transfer effect.
The d1 of the A/F of longitudinal fluting is 0.5 ~ 1mm, and the bottom width d3 of longitudinal fluting is 1.5 ~ 2mm, and the top width d2 of tooth portion is 1.5 ~ 2mm.
Longitudinal indentation of the present invention can increase the surface area of heat exchanger tube, thereby has improved heat-transfer effect.Longitudinal fluting inside is evenly equipped with circular projection, can further increase the surface area of heat exchanger tube, contributes to the thickness of attenuate condensate film.Above-mentioned longitudinal indentation and circular projection all need to be uniformly distributed, and are that the condensation heat transfer efficiency in order to ensure the each part of heat exchanger tube equates.
The end of the heat exchanger tube in the present invention is set to smooth surface, is mainly for convenience of installing.The two ends of heat exchanger tube need to be connected with upper perforated plate and lower perforated plate respectively, the length L=n+500 ~ 100mm of the end of smooth surface, and wherein, n has represented the thickness of upper perforated plate or lower perforated plate.
In described reboiler, the surface of described tooth portion is equipped with many longitudinal indentations, and the degree of depth of described longitudinal indentation is 0.1 ~ 0.15mm.
In described reboiler, the connecting portion 823 between bottom 822 and the sidepiece 821 of described longitudinal fluting is circular-arc, and the radius of curvature R 2 of connecting portion between bottom and the sidepiece of described longitudinal fluting is 0.1 ~ 0.2mm.
In described reboiler, the connecting portion 824 between described longitudinal fluting 82 and described tooth portion 81 is circular-arc, and the radius of curvature R 1 of connecting portion between described longitudinal fluting and described tooth portion is 0.1 ~ 0.2mm.
In the present invention, the connecting portion between bottom and the sidepiece of longitudinal fluting, and the connecting portion of longitudinal fluting and tooth portion all adopts circular-arc design, is also the surface condition in order to improve heat exchanger tube, makes condensate liquid be unlikely to assemble at this, and is easy to landing.
In described reboiler, the rough aperture of described porous layer for adopting aluminium powder, iron powder or copper powder sintering or soldering to form on the inner surface of the matrix of described heat exchanger tube.
In described reboiler, the external diameter of described heat exchanger tube is 19 ~ 57mm.
In described reboiler, the thickness of described heat exchanger tube matrix is 2 ~ 5mm.
Described reboiler, also comprises: multiple mount pads, it is with respect to the outer surface that is circumferentially distributed in described cylindrical shell of described cylindrical shell.
Reboiler of the present invention is vertical reboiler, contributes to the timely discharge of condensate liquid.
As shown in Figure 1, reboiler of the present invention comprises material inlet 1, low head 2, lower flange 3, lower perforated plate 4, condensate outlet 5, cylindrical shell 6, pull bar 7, heat exchanger tube 8, ear seat 9, upper perforated plate 10, drain 11, upper flange 12, upper cover 13, material outlet 14, steam inlet 15, impingement baffle 16, distance sink tube 17, deflection plate 18, expansion joint 19, sewage draining exit 20.
Wherein, between lower perforated plate 4 and upper perforated plate 10, be provided with cylindrical shell 6, heat exchanger tube 8, deflection plate 18, distance sink tube 17 and pull bar 7.Heat exchanger tube 8 is through deflection plate 18, and heat exchanger tube two ends are connected with lower perforated plate 4 and upper perforated plate 10 respectively; Deflection plate 18 is for increasing shell-side fluid operation length, raising heat transfer effect and support heat exchanger tube, is located and is fixed by distance sink tube 17 and pull bar 7; On low head 2, be provided with material inlet 1, upper cover 13 is provided with material outlet 14; Cylindrical shell 6 is provided with steam inlet 15 and condensate outlet 5; Ear seat 9 is distributed in drum surface, and plane of living in is vertical with cylindrical shell axis to keep the vertical installation of reboiler; Impingement baffle 16 is arranged in steam inlet 15, causes tube vibration unstability and corrosion to prevent steam from directly washing away pipe; Air when drain 11 moves in order to reboiler in emptying shell side, sewage draining exit 20 is used for draining the liquid in shell side while being reboiler stoppage in transit maintenance; On cylindrical shell, there is expansion joint 19, for compensating the additional stress causing because of the temperature difference between cylindrical shell 6 and heat exchanger tube 8.
Heat exchanger tube 8 includes matrix 21, and matrix 21 is processed by normal optical slip pipe.The inner surface of matrix is porous layer 22, and the middle part of outer surface has longitudinal fluting and tooth portion, and the outer surface of two ends is smooth surface, and two ends are separately fixed on lower perforated plate 4 and upper perforated plate 10.
In heat exchanger tube 8 process, first process longitudinal fluting and longitudinal indentation by the method for rolling or drawing at the outer surface of plain tube, then apply layer of metal powder at the inner surface of plain tube, form porous layer through oversintering or soldering.The material of heat exchanger tube can be carbon steel, steel alloy, stainless steel, copper alloy, aluminium alloy etc., and porous layer material can be iron-based powder, Cu-base powder, aluminium base powder.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in description and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (5)
1. a reboiler, is characterized in that, comprising:
Cylindrical shell, the two ends of described cylindrical shell have respectively material inlet and material outlet, and described cylindrical shell also has steam inlet in a side of described material outlet, and have condensate outlet in described material inlet one side;
Many heat exchanger tubes, described many heat exchanger tubes are arranged side by side in described cylindrical shell, wherein, described heat exchanger tube includes matrix and porous layer, described porous layer is positioned at the inner surface of described matrix, the thickness of described porous layer is 0.1～0.5mm, porosity is 30～60%, the outer surface of the mid portion of described matrix is equipped with multiple longitudinal flutings and multiple tooth portion, described longitudinal fluting and described tooth portion interval arrange, the inner surface of described longitudinal fluting is evenly equipped with circular projection, the cross section of described longitudinal fluting is trapezoidal, and the bottom of described longitudinal fluting is the trapezoidal long end, the degree of depth of described longitudinal fluting is 0.5～1.5mm, groove center distance is 2～3mm, the cross section of described tooth portion is inverted trapezoidal, the outer surface of two ends of described matrix is smooth surface, the surface of described tooth portion is equipped with many longitudinal indentations, and the degree of depth of described longitudinal indentation is 0.1～0.15mm, connecting portion between bottom and the sidepiece of described longitudinal fluting is circular-arc, and the radius of curvature of the connecting portion between bottom and the sidepiece of described longitudinal fluting is 0.1～0.2mm, connecting portion between described longitudinal fluting and described tooth portion is circular-arc, and the radius of curvature of the connecting portion between described longitudinal fluting and described tooth portion is 0.1～0.2mm.
2. reboiler as claimed in claim 1, is characterized in that, the rough aperture of described porous layer for adopting aluminium powder, iron powder or copper powder sintering or soldering to form on the inner surface of the matrix of described heat exchanger tube.
3. reboiler as claimed in claim 1, is characterized in that, the external diameter of described heat exchanger tube is 19～57mm.
4. reboiler as claimed in claim 1, is characterized in that, the thickness of described heat exchanger tube matrix is 2～5mm.
5. reboiler as claimed in claim 1, is characterized in that, also comprises:
Multiple mount pads, it is with respect to the outer surface that is circumferentially distributed in described cylindrical shell of described cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210162319.5A CN102671399B (en) | 2012-05-23 | 2012-05-23 | Reboiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210162319.5A CN102671399B (en) | 2012-05-23 | 2012-05-23 | Reboiler |
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| Publication Number | Publication Date |
|---|---|
| CN102671399A CN102671399A (en) | 2012-09-19 |
| CN102671399B true CN102671399B (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210162319.5A Active CN102671399B (en) | 2012-05-23 | 2012-05-23 | Reboiler |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105327522A (en) * | 2014-08-13 | 2016-02-17 | 江苏绿叶锅炉有限公司 | Fractionating tower reboiler |
| CN104529463B (en) * | 2015-01-21 | 2016-06-29 | 巩义市荣华节能陶瓷换热器有限公司 | A kind of ceramic material, heat-exchange ceramic and preparation method thereof, pottery reboiler |
| WO2017003711A1 (en) * | 2015-06-30 | 2017-01-05 | Uop Llc | Heat exchangers for low temperature carbon dioxide separation from natural gas |
| CN106693419B (en) * | 2015-11-12 | 2019-06-11 | 中国石油化工股份有限公司 | Vertical tube falling evaporator |
| CN111285421A (en) * | 2020-01-16 | 2020-06-16 | 董国亮 | Methanol-to-olefin sewage stripping tower system |
| CN112069609B (en) * | 2020-07-21 | 2024-04-30 | 中石化南京工程有限公司 | Design and calculation method of supporting ear seat of tower-attached reboiler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2798021Y (en) * | 2005-06-02 | 2006-07-19 | 高克联管件(上海)有限公司 | Two surface stengthened falling-film type heat transfer tube |
| CN101430171A (en) * | 2007-11-09 | 2009-05-13 | 上海奥侨实业有限公司 | Pipe for heat exchanger |
| CN201251384Y (en) * | 2008-07-09 | 2009-06-03 | 无锡化工装备总厂 | Fixed tube sheet heat exchanger |
| CN102121804A (en) * | 2011-03-04 | 2011-07-13 | 无锡化工装备有限公司（原无锡化工装备总厂) | Fixed tube-sheet heat exchanger with grooved parent tube surfaces |
-
2012
- 2012-05-23 CN CN201210162319.5A patent/CN102671399B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2798021Y (en) * | 2005-06-02 | 2006-07-19 | 高克联管件(上海)有限公司 | Two surface stengthened falling-film type heat transfer tube |
| CN101430171A (en) * | 2007-11-09 | 2009-05-13 | 上海奥侨实业有限公司 | Pipe for heat exchanger |
| CN201251384Y (en) * | 2008-07-09 | 2009-06-03 | 无锡化工装备总厂 | Fixed tube sheet heat exchanger |
| CN102121804A (en) * | 2011-03-04 | 2011-07-13 | 无锡化工装备有限公司（原无锡化工装备总厂) | Fixed tube-sheet heat exchanger with grooved parent tube surfaces |
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| CN102671399A (en) | 2012-09-19 |
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