CN102072679B - L-shaped tube heat exchanger - Google Patents
L-shaped tube heat exchanger Download PDFInfo
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- CN102072679B CN102072679B CN 201110035424 CN201110035424A CN102072679B CN 102072679 B CN102072679 B CN 102072679B CN 201110035424 CN201110035424 CN 201110035424 CN 201110035424 A CN201110035424 A CN 201110035424A CN 102072679 B CN102072679 B CN 102072679B
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Abstract
The invention relates to an L-shaped shell and tube heat exchanger, and belongs to the technical field of industrial heat exchangers. According to the technical scheme, the heat exchanger comprises an upper tube plate (2), a heat exchange chamber shell (3), a heat exchange piece (4) and a lower tube plate (8), wherein the upper tube plate is used as an inlet of a high-temperature medium; one end of the heat exchange piece arranged in the heat exchange chamber shell is fixed on the upper tube plate, and the other end of the heat exchange piece is fixed on the lower tube plate; and the heat exchange piece is communicated with the space outside the upper tube plate and the lower tube plate. The heat exchanger is characterized in that: the heat exchange piece is bent in the heat exchange chamber shell and arranged in the heat exchange chamber shell in an L-shaped or similar L-shaped structure. By adopting the structure that the heat exchange piece is bent in a heat exchange body, the heat exchange has simple structure, is convenient to process and manufacture and thorough to clear temperature difference stress, can bear expansion deformation of the heat exchange piece for a long term, runs stably for a long term, prolongs the service life, reduces the running cost, and is particularly suitable for heat reclamation of the high-temperature medium or quick cooling of the high-temperature medium after chemical reaction.
Description
Technical field
The present invention relates to a kind of L-type tubular heat exchanger, belong to industrial technical field of heat exchangers.
Background technology
At present, the tubular heat exchanger of industrial usefulness common are following two kinds of structures; The first is that the heat exchanger tube between upper perforated plate, the lower perforated plate is straight type structure; The second is that employing tube sheet, a heat exchanger tube are U-shaped structure.The tubular heat exchanger of the first upper, lower tube plate structure, the top of upper perforated plate can be used as reative cell or combustion chamber, existing problems are when medium temperature is higher in the straight pipe type tubular heat exchanger pipe, crackle often appears in the weld seam between tube sheet and the heat exchanger tube, cause damage of equipment affects service life and normal production; The top of the tube sheet of the U-shaped heat exchange of heat pipe of the second single tube plate then can not be as reative cell or combustion chamber, the present invention be directed to the tubular heat exchanger of the first upper, lower tube plate structure and the improvement carried out.
When the top of upper perforated plate during as the space of chemical reaction or burning, this Spatial General 6 R is cylindrical shell or other shape and structure, be referred to as reative cell or combustion chamber, the bottom of upper perforated plate is the device that high-temperature medium product after reaction or the burning is cooled off fast or carries out heat recovery, to be some heat exchanger tubes be arranged on structure in the Heat Room housing by upper perforated plate, lower perforated plate to its structure, total is referred to as tubular heat exchanger, and its operation principle is identical with fire tube heat recovery steam generator.Upper perforated plate is the end of reative cell or combustion chamber cylindrical shell, also is the top of Heat Room housing, in service at reactor, and crackle often appears in the weld seam between upper perforated plate and the heat exchanger tube, and cause damage of equipment affects service life and normal production.The basic reason that weld seam between upper perforated plate and the heat exchanger tube cracks is: the heat exchange tube wall extends because temperature is high, and Heat Room housing Yin Wendu is low and shorten (or elongation is few), and the two moves through upper perforated plate and produces conflict.In order to solve the problems of the technologies described above, people have considered a lot of schemes, and what have adds expansion joint at the Heat Room housing, allow distortion the Heat Room housing hold and make; The employing flexible tubesheet that has; Employing bellows tube that also has etc.; But because chemical reaction or combustion reaction are inhomogeneous local reaction sometimes, said method solves all that some is unable to do what one wishes, produces little effect, and is all not ideal enough, can not tackle the problem at its root.
Summary of the invention
The purpose of this invention is to provide a kind of L-type tubular heat exchanger, simple and reliable for structure, can bear for a long time the dilatancy of heat exchanging piece, thereby reduce the operating cost of equipment the service life of extension reactor, solve the problems referred to above that background technology exists.
Technical scheme of the present invention is:
A kind of L-type tubular heat exchanger, comprise upper perforated plate, Heat Room housing, heat exchanging piece, lower perforated plate, upper perforated plate is arranged on the top of Heat Room, upper perforated plate is as the import of high-temperature medium, be arranged on that heat exchanging piece one end in the Heat Room housing is fixed on the upper perforated plate, the other end is fixed on the lower perforated plate, heat exchanging piece is communicated with upper perforated plate, lower perforated plate space outward, its special feature is some heat exchanging piece curved arrangement in the Heat Room housing, and jointly bending in the same direction is L-type or similar L-type structure is arranged in the Heat Room housing.
The shape of the profile of Heat Room housing and inner heat exchanging piece bending is complementary or is close, heat exchanging piece between upper perforated plate, the lower perforated plate and Heat Room housing are crooked synchronously, angle of bend is close, be L-type or similar L-type structure, angle of bend is greater than 0 degree, less than 180 degree, better angle of bend is 45-100 degree, and 90 degree are best angle of bend.
The cross sectional shape of said heat exchanging piece is arbitrarily, and quantity is arbitrarily, determines according to arts demand.The better shape of heat exchanging piece is heat exchanger tube, and the cross section is cast, and round tube is best.Some heat exchanger tubes in the Heat Room housing in the same direction crooked, be parallel to each other or approximate being arranged in parallel; Better mode is: heat exchanger tube is bowing, and the crooked circular arc of some heat exchanger tubes is parallel to each other or is approximate parallel.
Because the heat exchanging piece between upper perforated plate, the lower perforated plate and heat exchanger shell are crooked synchronously, lower perforated plate is arranged on a side of Heat Room housing bottom, upper perforated plate and be provided with pore above the lower perforated plate, L-type or similar L-type heat-exchanging tube bundle in the Heat Room housing, every pipe of heat-exchanging tube bundle is connected with the pore insertion of upper and lower tube sheet, and the method for attachment of every pipe and upper and lower tube sheet is welding or expanded joint, method of attachment all belongs to known technology, and heat exchanger tube is communicated with the space of upper perforated plate and lower perforated plate outside.
The said upper perforated plate of the present invention, lower perforated plate, its version are the tube plate structure form of fire tube heat recovery steam generator, and tube sheet itself is not as the part of the housing of Heat Room.
L-type Heat Room housing of the present invention is provided with heat transferring medium import and export, sewage draining exit etc., and said heat transferring medium is liquid or gas.
Good effect of the present invention is: for the problem of straight pipe type tubular heat exchanger existence, adopt the structure of heat exchanging piece curved arrangement in heat exchanging body, have the characteristics such as simple in structure, that processing and fabricating convenient, the thermal (temperature difference) stress removing is thorough, can bear for a long time the dilatancy of heat exchanging piece, equipment can long-period stable operation, increase the service life, reduce the operating cost of equipment, be specially adapted to the recuperation of heat of high-temperature medium behind the chemical reaction or the fast cooling of high-temperature medium.
The present invention can be applied on the oxidator or other similar reactor of reactor, Making Nitric Acid by Ammonia Oxygen Process of producing formaldehyde by methanol oxidation.
Description of drawings
Accompanying drawing 1 is schematic diagram of the present invention;
Accompanying drawing 2 is one embodiment of the invention structural representations;
Among the figure: reative cell 1, upper perforated plate 2, Heat Room housing 3, heat exchanging piece 4, lower perforated plate 5, reaction-ure inlet 6, reactant outlet 7, heat transferring medium import 8, heat transferring medium outlet 9, sewage draining exit 10.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described by embodiment.
With reference to accompanying drawing 1, a kind of L-type tubular heat exchanger, comprise upper perforated plate 2, Heat Room housing 3, heat exchanging piece 4, lower perforated plate 5, upper perforated plate is arranged on the top of Heat Room, the external contact thermal source of upper perforated plate, direct import as high-temperature medium, heat exchanging piece one end that is arranged in the Heat Room housing is fixed on the upper perforated plate, the other end is fixed on the lower perforated plate, heat exchanging piece and upper perforated plate, the outer space of lower perforated plate is communicated with, its special feature is some heat exchanging piece curved arrangement in the Heat Room housing, and jointly bending in the same direction is L-type or similar L-type structure is arranged in the Heat Room housing.The profile of Heat Room housing is complementary with the shape of the heat exchanging piece bending of inside, and the heat exchanging piece between upper perforated plate, the lower perforated plate and Heat Room housing are crooked synchronously, are L-type or similar L-type structure, and 90 degree are best angle of bend.The cross sectional shape round tube of said heat exchanging piece is best, and heat exchanger tube is bowing, and the crooked circular arc of some heat exchanger tubes is parallel to each other.Lower perforated plate is arranged on a side of Heat Room housing bottom, upper perforated plate and be provided with pore above the lower perforated plate, L-type or similar L-type heat-exchanging tube bundle in the Heat Room housing, every pipe of heat-exchanging tube bundle, be connected with the pore insertion of upper perforated plate, lower perforated plate, the method of attachment of every pipe and upper lower perforated plate is welding or expanded joint, and heat exchanger tube is communicated with the space of upper perforated plate and lower perforated plate outside.
Operation principle of the present invention is: the high-temperature medium behind the generation chemical reaction enters in the heat exchange pipe of L-type tube bank via upper perforated plate, heat exchanger tube is subjected to thermal stretching, owing to be L-type heat-exchanging tube bundle structure, top power to the both sides tube sheet is very little, thereby avoids the weld seam between tube sheet and the heat exchanger tube crackle often to occur.The heat of pyroreaction thing is passed to rapidly the outer heat transferring medium of heat exchanger tube, after the high-temperature medium cooling, flows out lower perforated plate, and heat transferring medium is entered by the Heat Room housing, flows outside the pipe of L-type heat pipe bundle, discharges behind the heat of pyroreaction thing in the absorption heat-exchange pipe.
With reference to accompanying drawing 2, present embodiment is used the present invention for the reactor take methyl alcohol as raw air catalytic oxidation formaldehyde processed.
Be reative cell 1 above the upper perforated plate 2, reative cell is provided with reaction-ure inlet 6; Above the upper perforated plate of reative cell bottom silk screen is set, catalyst is set on the silk screen; It is the L-type heat-exchanging tube bundle in the Heat Room housing 3, and be connected with upper perforated plate 2, lower perforated plate 5, thing outlet 7 responds on the end socket that lower perforated plate connects, the Heat Room housing is provided with heat transferring medium import 8, sewage draining exit 10, Heat Room housing top is provided with heat transferring medium outlet 9, said heat transferring medium is liquid or gas, for example water.
The embodiment course of work is: after unstripped gas under catalyst action oxidation reaction occurs, the pyroreaction thing enters in the heat exchange pipe of L-type tube bank via upper perforated plate, heat exchanger tube is subjected to thermal stretching, owing to be L-type heat-exchanging tube bundle structure, top power to the both sides tube sheet is very little, thereby avoids the weld seam between tube sheet and the heat exchanger tube crackle often to occur.The heat of pyroreaction thing is passed to rapidly the outer water of heat exchanger tube, after the cooling, flowing out lower perforated plate discharges through the outlet of low head reactant, feedwater is entered by the import of cooling chamber lower housing portion heat transferring medium, outside the pipe of L-type heat pipe bundle, flow, vaporize behind the heat of pyroreaction thing in the absorption heat-exchange pipe, liquid-vapor mixture is discharged by the heat transferring medium outlet on cooling chamber housing top.
Claims (1)
1. L-type tubular heat exchanger, it is characterized in that: comprise upper perforated plate (2), Heat Room housing (3), heat exchanging piece (4), lower perforated plate (5), upper perforated plate is arranged on the top of Heat Room, upper perforated plate is as the import of high-temperature medium, heat exchanging piece one end that is arranged in the Heat Room housing is fixed on the upper perforated plate, the other end is fixed on the lower perforated plate, heat exchanging piece and upper perforated plate, the outer space of lower perforated plate is communicated with, its special feature is some heat exchanging piece curved arrangement in the Heat Room housing, and jointly bending in the same direction is L-type or similar L-type structure is arranged in the Heat Room housing; The shape of the profile of Heat Room housing and inner heat exchanging piece bending is complementary or is close, heat exchanging piece between upper perforated plate, the lower perforated plate and Heat Room housing are crooked synchronously, angle of bend is close, is L-type or similar L-type structure, and angle of bend is greater than 0 degree, less than 180 degree; Said heat exchanging piece is heat exchanger tube; Some heat exchanger tubes in the Heat Room housing in the same direction crooked, be parallel to each other or approximate being arranged in parallel; Heat exchanger tube is bowing, and the crooked circular arc of some heat exchanger tubes is parallel to each other or is approximate parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110035424 CN102072679B (en) | 2011-02-10 | 2011-02-10 | L-shaped tube heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110035424 CN102072679B (en) | 2011-02-10 | 2011-02-10 | L-shaped tube heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102072679A CN102072679A (en) | 2011-05-25 |
| CN102072679B true CN102072679B (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110035424 Active CN102072679B (en) | 2011-02-10 | 2011-02-10 | L-shaped tube heat exchanger |
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| CN (1) | CN102072679B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106461238A (en) | 2014-06-05 | 2017-02-22 | 三星电子株式会社 | Integrated air conditioner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2606876Y (en) * | 2003-03-25 | 2004-03-17 | 郑州市黄河锅炉辅机厂 | Full steel structure tube heat exchanger |
| CN201311044Y (en) * | 2008-08-26 | 2009-09-16 | 钟捷 | Normal-pressure gas or oil fired of pipeless fire box type |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT278877B (en) * | 1966-06-27 | 1970-02-10 | Waagner Biro Ag | Shell and tube heat exchanger |
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2011
- 2011-02-10 CN CN 201110035424 patent/CN102072679B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2606876Y (en) * | 2003-03-25 | 2004-03-17 | 郑州市黄河锅炉辅机厂 | Full steel structure tube heat exchanger |
| CN201311044Y (en) * | 2008-08-26 | 2009-09-16 | 钟捷 | Normal-pressure gas or oil fired of pipeless fire box type |
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| Publication number | Publication date |
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| CN102072679A (en) | 2011-05-25 |
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