CN201251387Y - Shell-and-tube heat exchanger with sliding guided support and stuffing box - Google Patents
Shell-and-tube heat exchanger with sliding guided support and stuffing box Download PDFInfo
- Publication number
- CN201251387Y CN201251387Y CNU2008201513847U CN200820151384U CN201251387Y CN 201251387 Y CN201251387 Y CN 201251387Y CN U2008201513847 U CNU2008201513847 U CN U2008201513847U CN 200820151384 U CN200820151384 U CN 200820151384U CN 201251387 Y CN201251387 Y CN 201251387Y
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Abstract
The utility model relates to a shell-and-tube heat exchanger, in particular to a shell-and-tube heat exchanger with sliding guided support and stuffing box, which comprises a casing, a tube bundle, a fixed tube sheet, a float tube sheet, closed heads, a stuffing box and a sliding guided support, wherein one end of the tube bundle is connected with the fixed tube sheet, and the other end thereof is connected with the float tube sheet, the fixed tube sheet is fixed on one end of the casing, the sliding guided support is supported on the lower portion of the float tube sheet, the closed heads are arranged on the two ends of the casing, one end of the stuffing box is connected with the float tube sheet, and the side thereof is attached on the casing to form the sealing, and the closed heads are arranged on the two ends of the casing. The shell-and-tube heat exchanger can reliably avoid the fluid leakage between the tube pass and the shell pass, simultaneously, guarantees the free expansion and shrinkage of the tube pass of the heat exchanger, ensures the reliability of the heat exchanger. The heat exchanger of the utility model is especially suitable for the heat exchange and other serious leakages between reaction product and reactant, significantly increases the reliability of the device, and improves the production benefits.
Description
Technical field
The utility model relates to a kind of shell-and-tube heat exchanger, is specifically related to the hermetically-sealed construction of shell-and-tube heat exchanger.
Background technology
In chemical industry and petrochemical industry, the application of heat exchanger is very extensive, is indispensable process equipment commonly used, also is seen everywhere in daily life.According to statistics, heat exchanger accounts for about 40% of equipment sum in oil refining and chemical plant installations, and investment accounts for the 30-45% of gross investment.Along with the development of power-saving technology, the recovery that utilizes heat exchanger to carry out high temperature, low temperature heat energy has brought remarkable economic efficiency in recent years.At present, in heat transmission equipment, the use amount maximum be shell-and-tube heat exchanger.Development along with petroleum industry and chemical industry, the shell-and-tube heat exchanger that various harsh conditions are used is more and more, for example oil refining hydrocracking, kerosene hydrogenation, gasoline, diesel hydrogenation and lube oil hydrogenation, catalytic reforming, hydrofinishing etc., cracking of ethylene in chemical industry, ethylbenzene dehydrogenation, high-pressure and low-pressure polymerization, ammonia synthesis in chemical fertilizer, conversion of natural gas or the like, heat exchanger need bear pressure from the vacuum to 35MPa, the harsh environment for use of temperature up to 700～900 ℃.
Entered since 21 century, along with the high speed development that device maximizes, the use of large heat exchanger more and more extensively, more and more frequent, technical difficulty reliability requirement more and more big, equipment is more and more high.How to ensure the heat exchange effect, improve the thermal efficiency, improve the reliability of equipment, become crucial research topic, the various large heat exchanger technology that are applied under the special process condition emerge in an endless stream, and are too numerous to enumerate.
Two kinds of the most frequently used in shell-and-tube heat exchanger heat exchangers are fixed tube-sheet exchanger and movable tube sheets heat exchanger.The technology of " chemical process design manual " 5-351 page or leaf, 5-357 page or leaf and Chinese patent application 01131478.8 patent disclosure of writing as Sinopec Group Shanghai Engineering Co., Ltd..Because heat exchanger tube side and shell-side fluid are carried out heat exchange, certainly exist temperature difference, when temperature difference greatly when surpassing the temperature stress that material can bear, just must adopt the engineering measure of eliminating expansion.In fixed tube-sheet exchanger, owing to the two ends tube sheet is fixed, so expansion joint can only be set on housing, when elongation takes place or shortens in tube bank, can compensate by the elongation and the shortening of expansion joint, thereby do not leak between guarantee tube side and the shell side, guarantee basic heat exchange effect.In movable tube sheets heat exchanger, there is not expansion joint on the housing, so tube side one end adopts fixed tube sheet, the other end adopts slip tube sheet (promptly raising the nose above water to breathe), tube bank can extend in housing and shorten freely, but this measure has solved the problem that expands, and is inevitable by having brought the another one problem, i.e. fluid sealing problem between tube side and the shell side.For head it off, method commonly used is to adopt the packing box seal structure, owing to adopt hermetically-sealed construction, leakage must be arranged, and is controlled within the acceptable scope so be merely able to guarantee the amount of leaking, and for example is not more than 5% of total flow.
At this two classes heat exchanger, in fixed tube-sheet exchanger and the movable tube sheets heat exchanger, usually fixed tube-sheet exchanger only is used for horizontal, because the shearing force when the vertical heat exchanger expansion joint can't bear the earthquake generation, and when being designed to bear earthquake shearing power, again because the expansion that rigidity and intensity almost lose; And horizontal equipment can bear earthquake shearing power.But in maximization is that expansion joint is set on pressure hull, does not still accept for numerous engineers and technicians.In movable tube sheets heat exchanger, when employing was vertical, stuffing-box can keep good stress, and certain circumferential uniformity is arranged, and can guarantee that the amount of leaking is controlled within the acceptable scope.But when employing is horizontal, packing box seal is in a kind of state of circumferential discontinuity equalization, because the deadweight of floating tubesheet and tube bank, make the filler of below be in the state that compresses more relatively, the filler of top then is in lax relatively state, it almost is inevitable in view of this leaking, especially after intensification cooling operation repeatedly, will inevitably bring considerable leakage rate, thereby had influence on the normal stable operation of device, perhaps caused unnecessary energy, the loss of material.For example on the ethyl benzene dehydrogenation preparation of styrene device, as " petrochemical equipment technology " 2000 21 volumes 5 phases report of the 6th page, a horizontal floating head type stuffing-box heat exchanger is used for the ethylbenzene dehydrogenation second reactor outlet high-temperature material waste heat ethylbenzene dehydrogenation first Reactor inlet material, the hot fluid temperature walk the tube side temperature from 560-580 ℃ of heats cold fluid temperature reduction to 320-360 ℃, cold fluid is walked the shell side temperature and is heated to 500 ℃ from about 100 ℃, shell journey temperature difference is bigger, tube bank taking place time and again damage, causes heat exchange equipment to lose efficacy.Leakage accident takes place time and again, cause reactor efficiency seriously to descend, up to keeping normal production.Two class accidents cause repeatedly is forced to stop, and becomes the bottleneck that restriction is produced.
Inventor's patent has formerly proposed to utilize a kind of shell-and-tube heat exchanger that has sliding guiding support and inner expansion joint to solve above problem, see Chinese patent application numbers 200710043304.6, but find in the engineering practice that in a single day (1) inner expansion joint damages maintenance difficult; (2) various solid impurities can accumulate among the space of inner expansion joint ripple, cause expansion joint to lose efficacy or damage, and therefore design a kind of new shell-and-tube heat exchanger, are that institute of relevant branch of industry very expects.
Summary of the invention
The purpose of this utility model is to propose a kind of shell-and-tube heat exchanger that has sliding guiding support and packing box seal, to overcome the above-mentioned defective that prior art exists, satisfies the industrial department needs.
The shell-and-tube heat exchanger that has sliding guiding support and packing box seal of the present utility model comprises housing, tube bank, fixed tube sheet, floating tubesheet, end socket, stuffing-box and sliding guiding support spare;
One end of said tube bank is connected with fixed tube sheet, the other end is connected with floating tubesheet, fixed tube sheet is fixed on an end of housing, sliding guiding support spare is bearing in the below of floating tubesheet, moving of guiding floating tubesheet, end socket is arranged on the two ends of housing, and an end of stuffing-box is connected with floating tubesheet, its side is close to housing and is constituted sealing, and said end socket is arranged on the two ends of housing.
The shell-and-tube heat exchanger that has sliding guiding support and packing box seal of the present utility model can be avoided the leakage of fluid between tube side and the shell side reliably, guarantees that simultaneously the tube side of heat exchanger is free to expand and shorten, and guarantees the reliability of heat exchanger.Heat exchanger of the present utility model is specially adapted to heat exchange and the serious occasion of other leakage contributions between product and the reactant.Significantly improve the reliability of equipment, improved productivity effect.
Description of drawings
Fig. 1 is the structural representation that has the shell-and-tube heat exchanger of sliding guiding support and packing box seal.
Fig. 2 is the A-A phase schematic diagram among Fig. 2.
The specific embodiment
Referring to Fig. 1 and Fig. 2, the shell-and-tube heat exchanger that has sliding guiding support and packing box seal of the present invention comprises housing 1, tube bank 2, fixed tube sheet 3, floating tubesheet 4, end socket 5, stuffing-box 6 and sliding guiding support spare 7;
One end of said tube bank 2 is connected with fixed tube sheet 3, the other end is connected with floating tubesheet 4, fixed tube sheet 3 is fixed on an end of housing 1, sliding guiding support spare 7 is bearing in the below of floating tubesheet 4, moving of guiding floating tubesheet 4, end socket 5 is arranged on the two ends of housing 1, one end 601 of stuffing-box 6 is connected with floating tubesheet 4, its side is close to housing 1 and is constituted sealing, therefore, stuffing-box 6 can freely stretch with the flexible of floating tubesheet 4, and said end socket 5 is arranged on the two ends of housing 1, and said stuffing-box 6 can adopt the commercially available universal product;
Preferably, described sliding guiding support spare 7 is symmetricly set on below the described shell-and-tube heat exchanger central horizontal face by center line, and to play effective supporting, quantity is 2～8.
Claims (3)
1. the shell-and-tube heat exchanger that has sliding guiding support and stuffing-box comprises housing (1), tube bank (2), fixed tube sheet (3), floating tubesheet (4) and end socket (5), it is characterized in that, also comprises stuffing-box (6) and sliding guiding support spare (7);
One end of said tube bank (2) is connected with fixed tube sheet (3), the other end is connected with floating tubesheet (4), fixed tube sheet (3) is fixed on an end of housing (1), sliding guiding support spare (7) is bearing in the below of floating tubesheet (4), end socket (5) is arranged on the two ends of housing (1), one end (601) of stuffing-box (6) is connected with floating tubesheet (4), and its side is close to housing (1) and is constituted sealing, and said end socket (5) is arranged on the two ends of housing (1).
2. the shell-and-tube heat exchanger that has sliding guiding support and stuffing-box according to claim 1 is characterized in that, described sliding guiding support spare (7) is symmetricly set on below the described shell-and-tube heat exchanger central horizontal face by center line.
3. the shell-and-tube heat exchanger that has sliding guiding support and stuffing-box according to claim 1 and 2 is characterized in that, described sliding guiding support spare (7) quantity is 2～8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201513847U CN201251387Y (en) | 2008-07-29 | 2008-07-29 | Shell-and-tube heat exchanger with sliding guided support and stuffing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201513847U CN201251387Y (en) | 2008-07-29 | 2008-07-29 | Shell-and-tube heat exchanger with sliding guided support and stuffing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201251387Y true CN201251387Y (en) | 2009-06-03 |
Family
ID=40747060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201513847U Expired - Lifetime CN201251387Y (en) | 2008-07-29 | 2008-07-29 | Shell-and-tube heat exchanger with sliding guided support and stuffing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201251387Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806104A (en) * | 2014-12-31 | 2016-07-27 | 天津华赛尔传热设备有限公司 | Plate type floating head heat exchanger |
| CN110160377A (en) * | 2019-06-28 | 2019-08-23 | 常州瑞凯化工装备有限公司 | Vertical shell-and-tube heat exchanger |
-
2008
- 2008-07-29 CN CNU2008201513847U patent/CN201251387Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806104A (en) * | 2014-12-31 | 2016-07-27 | 天津华赛尔传热设备有限公司 | Plate type floating head heat exchanger |
| CN110160377A (en) * | 2019-06-28 | 2019-08-23 | 常州瑞凯化工装备有限公司 | Vertical shell-and-tube heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090603 |