CN105135907A - High-temperature-resistant single-tube-pass heat exchange method and heat exchanger - Google Patents
High-temperature-resistant single-tube-pass heat exchange method and heat exchanger Download PDFInfo
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- CN105135907A CN105135907A CN201410250821.0A CN201410250821A CN105135907A CN 105135907 A CN105135907 A CN 105135907A CN 201410250821 A CN201410250821 A CN 201410250821A CN 105135907 A CN105135907 A CN 105135907A
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Abstract
The invention provides a high-temperature-resistant single-tube-pass heat exchange method, and belongs to the technical fields of petrochemical engineering, heat energy utilization and process equipment. The high-temperature-resistant single-tube-pass heat exchange method is used for solving the problem that high-temperature heat exchanger pipe plates are prone to damage. The high-temperature-resistant single-tube-pass heat exchange method includes the steps that a tube pass medium enters an external tube box, exchanges heat with a shell pass medium through a heat exchange tube bundle, and is then collected and discharged. The high-temperature-resistant single-tube-pass heat exchange method is characterized in that the tube pass medium enters the independent and complete external tube box and enters an independent and complete internal tube box after exchanging heat with the shell pass medium through the heat exchange tube bundle; the internal tube box and the external tube box are communicated through an outer tube of a sleeve; one end of an inner tube of the sleeve is arranged in the internal tube box, and the other end of the inner tube of the sleeve extends out of the external tube box; and the medium of the internal tube box is discharged through the inner tube of the sleeve. The invention further provides the internal tube box, the external tube box, the heat exchange tube bundle, the connection sleeve and a guiding and positioning device used for achieving the method. The heat exchange method can be suitable for high-temperature heat exchange and countercurrent flow heat exchange, tube plates are uniform in temperature and are not prone to damage, the heat exchange tube bundle can be drawn out as a whole to be conveniently overhauled, and the heat exchange method is suitable for high-temperature medium heat exchange and steam generators.
Description
Technical field
The invention belongs to petrochemical industry, heat energy utilization, Process Equipment Technology field, particularly one high temperature resistant single tube journey heat-exchange method and heat exchanger.
Background technology
Petrochemical production process has a lot of waste heat, and some devices even have a lot of high-temperature residual heat.As catalytic cracking unit fractionating system to have in circulation slurry oil 280 DEG C ~ 350 DEG C waste heats, two recycle oil 160 DEG C ~ 200 DEG C waste heats, recycle oil 220 DEG C ~ 330 DEG C of waste heats etc. in recycle oil 200 DEG C ~ 300 DEG C waste heats.Usually by exchange heat or generation stream mode recovery waste heat, conventional heat-exchange apparatus is movable tube sheets heat exchanger or U-tube heat exchanger.Catalytic cracking unit circulation slurry heat-exchanger or steam generator are generally 4 tube side movable tube sheets heat exchangers, medium entrance temperature 340 ~ 350 DEG C, outlet temperature 260 ~ 280 DEG C, there is the larger temperature difference in its outer bobbin carriage tube sheet medium entrance region and media outlet region, make tube sheet high/low temperature junction produce larger thermal stress, the stress fatigue of tube sheet generation year in and year out causes crackle even to rupture.
Summary of the invention
The object of this invention is to provide a kind of high temperature resistant single tube journey heat-exchange method, adapt to high temperature heat exchange, tube sheet homogeneous temperature is not fragile, and heat-exchanging tube bundle overallly can extract easy access out.
The present invention solves the method that its technical problem adopts: comprise tube side medium and enter, through heat-exchanging tube bundle and shell side media for heat exchange, again through gathering and discharging, it is characterized in that: tube side medium enters the external bobbin carriage of an independent completion, after heat-exchanging tube bundle and shell side media for heat exchange, enters the built-in bobbin carriage of an independent completion, be communicated with through the outer tube of a sleeve pipe between built-in bobbin carriage with external bobbin carriage, external bobbin carriage is stretched out at the inner other end of built-in bobbin carriage in interior pipe one end of sleeve pipe, and the medium of built-in bobbin carriage is discharged by the interior pipe of sleeve pipe.
Further, built-in bobbin carriage can also be entered through interior pipe by tube side medium, discharge through external bobbin carriage after heat-exchanging tube bundle and shell side media for heat exchange.
A kind of high temperature resistant single tube pass heat exchanger, comprise apparatus casing, outer bobbin carriage, interior bobbin carriage, tubulation or coiled pipe or spiral element heat-exchanging tube bundle, sleeve pipe, sleeve pipe is made up of inner and outer tubes, be arranged on heat-exchanging tube bundle center or eccentric position, heat-exchanging tube bundle and outer tube one end are connected with outer bobbin carriage or outer concetrated pipe, the other end is connected with interior bobbin carriage or interior concetrated pipe, the inner end of interior pipe is inner at interior bobbin carriage, outer end passes through outer bobbin carriage or outer concetrated pipe, and interior bobbin carriage or interior concetrated pipe are located at enclosure interior and are connected with guide locating device provided.
Further, heat exchanger tube is tubulation or bellows or screwed pipe, can also arrange interposer in heat exchanger tube, can also or/and inner side arranges longitudinal fin or ailhead outside heat exchanger tube.
Further, heat-exchanging tube bundle adopts segmental baffle or double segmental baffle or helical baffles or rod baffle guiding.
Further, drum type brake housing or autoclave housing is adopted, horizontal layout or vertical.
Further, can also in the inner side of interior pipe or/and arranged outside thermal insulation layer.
Further, when for carbonated drink separated space, silk screen or grid, drip pan or groove, external down pipe can also be arranged during vertical steam generator scheme.
Further, guide locating device provided is that outside adjustment is airtight guide locating device provided, comprises nut, stud, stuffing-box, guide-localization key and external seal cover; Or built-in fixed guide locating device provided, comprise guide-localization round key, sleeve pipe and connecting plate.
Innovative point of the present invention and good effect:
Innovative point of the present invention is: tube side medium enters the external bobbin carriage of an independent completion, after heat-exchanging tube bundle and shell side media for heat exchange, enters the built-in bobbin carriage of an independent completion, be communicated with through the outer tube of a sleeve pipe between built-in bobbin carriage with external bobbin carriage, external bobbin carriage is stretched out at the inner other end of built-in bobbin carriage in interior pipe one end of sleeve pipe, and the medium of built-in bobbin carriage is discharged by the interior pipe of sleeve pipe.
Good effect of the present invention is: 1, heat-exchanging tube bundle can expand at enclosure interior Free Thermal, can adapt to high temperature heat exchange; 2, eliminate the larger temperature difference between multi-tube pass heat exchanger tube sheet zones of different, tube sheet homogeneous temperature is not fragile, and heat-exchanging tube bundle overallly can extract easy access out; 3, reversible flow heat exchange, realizes exchange heat and maximizes; 4, vertical can avoid catalyst particles to deposit, and is particularly useful for the slurry oil heat exchange of catalytic cracking unit high temperature circulation or steam generator.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of high temperature resistant single tube journey heat-exchange method and heat exchanger.
1A-moisture outlet, the import of 2-deaerated water, 4-apparatus casing, 5-is airtight guide locating device provided, pipe in 7-, the outer bobbin carriage of 8-, the 9-tube side mouth of pipe, 10-heat-exchanging tube bundle, 11-outer tube, 12-rod baffle, bobbin carriage in 13-.
Fig. 2 is the schematic diagram of another kind of high temperature resistant single tube journey heat-exchange method and heat exchanger.
1-steam (vapor) outlet, the import of 2-deaerated water, 4A-autoclave apparatus casing, 5-is airtight guide locating device provided, 6-silk screen, pipe in 7-, the outer bobbin carriage of 8-, the 9-tube side mouth of pipe, 10-heat-exchanging tube bundle, 11-outer tube, 12-rod baffle, bobbin carriage in 13-, 14-liquid level gauge, 15-carbonated drink segregation section.
Fig. 3 is the schematic diagram of another kind of high temperature resistant single tube journey heat-exchange method and heat exchanger.
1-steam (vapor) outlet, the import of 2-deaerated water, 3-external down pipe, 4-apparatus casing, the built-in guide-localization connecting plate of 5A-, the built-in guide-localization round key of 5B-, 6-silk screen, pipe in 7-, the outer bobbin carriage of 8-, the 9-tube side mouth of pipe, 10-heat-exchanging tube bundle, 11-outer tube, 12-rod baffle, bobbin carriage in 13-, 14-liquid level gauge, 15-carbonated drink segregation section.
Fig. 4 is the schematic diagram of another kind of high temperature resistant single tube journey heat-exchange method and heat exchanger.
1B-exhanst gas outlet, 2A-gas approach, 4-apparatus casing, the built-in guide-localization connecting plate of 5A-, the built-in guide-localization round key of 5B-, pipe in 7-, the outer concetrated pipe of 8A-, the 9-tube side mouth of pipe, 10A-longitudinal fin heat-exchanging tube bundle, 11A-longitudinal fin outer tube, 12-rod baffle, concetrated pipe in 13A-.
Detailed description of the invention
See Fig. 1, be applied to catalytic cracking unit circulation slurry oil horizontal steam generator, it is inner that heat-exchanging tube bundle 10 is horizontally set on apparatus casing 4, the sleeve pipe of 1 outer tube 11 and interior pipe 7 composition is set at lower position, heat-exchanging tube bundle 10 and outer tube 11 two ends are connected with outer bobbin carriage 8, interior bobbin carriage 13 respectively, outer bobbin carriage 8 lower end is provided with the tube side mouth of pipe 9, and interior pipe 7 outer end passes through outer bobbin carriage 8.It is inner that interior bobbin carriage 13 is located at apparatus casing 4, with 2 airtight guide locating device provided 5 guide-localizations, arranges number row rod baffle 12 between heat-exchanging tube bundle 10.Apparatus casing 4 bottom is provided with 2 ~ 4 deaerated water imports 2, and top is provided with 2 ~ 4 moisture outlet 1A.
See Fig. 2, be applied to catalytic cracking unit circulation slurry oil autoclave steam generator, heat-exchanging tube bundle 10 is horizontally set on autoclave apparatus casing 4A bottom, and the sleeve pipe of 1 outer tube 11 and interior pipe 7 composition is set at bottom position, heat-exchanging tube bundle 10 and outer tube 11 two ends are connected with outer bobbin carriage 8, interior bobbin carriage 13 respectively, outer bobbin carriage 8 lower end is provided with the tube side mouth of pipe 9, and interior pipe 7 outer end passes through outer bobbin carriage 8.It is inner that interior bobbin carriage 13 is located at autoclave apparatus casing 4A, with 2 airtight guide locating device provided 5 guide-localizations, arranges number row rod baffle 12 between heat-exchanging tube bundle 10.Autoclave apparatus casing 4A top is the vapor space, and be provided with deaerated water import 2, liquid level gauge 14, top is connected with carbonated drink segregation section 15; Be provided with silk screen 6 in carbonated drink segregation section 15, top is provided with steam (vapor) outlet 1.
See Fig. 3, be applied to catalytic cracking unit circulation slurry oil vertical steam generator, it is inner that heat-exchanging tube bundle 10 is vertically set on apparatus casing 4, the sleeve pipe of 1 outer tube 11 and interior pipe 7 composition is set in center, heat-exchanging tube bundle 10 and outer tube 11 two ends are connected with outer bobbin carriage 8, interior bobbin carriage 13 respectively, outer bobbin carriage 8 lower end is provided with the tube side mouth of pipe 9, and interior pipe 7 outer end passes through outer bobbin carriage 8.It is inner that interior bobbin carriage 13 is located at apparatus casing 4, the built-in guide locating device provided guiding formed with built-in guide-localization connecting plate 5A and built-in guide-localization round key 5B, arranges number row rod baffle 12 between heat-exchanging tube bundle 10.Apparatus casing 4 top is connected with carbonated drink segregation section 15, and be provided with deaerated water import 2, liquid level gauge 14 in the middle part of carbonated drink segregation section 15, top is provided with silk screen 6, and top is provided with steam (vapor) outlet 1.External down pipe 3 upper end is connected with carbonated drink segregation section 15 bottom and is communicated with, and lower end is connected with apparatus casing 4 bottom and is communicated with.
See Fig. 4, be applied to high-temperature flue gas steam superheater, apparatus casing 4 vertical (or level) is arranged, it is inner that longitudinal fin heat-exchanging tube bundle 10A is arranged on apparatus casing 4, the sleeve pipe of 1 longitudinal fin outer tube 11A and interior pipe 7 composition is set in center, longitudinal fin heat-exchanging tube bundle 10A and longitudinal fin outer tube 11A two ends are connected with outer concetrated pipe 8A, interior concetrated pipe 13A respectively, and outer concetrated pipe 8A is provided with the tube side mouth of pipe 9, and interior pipe 7 outer end passes through outer concetrated pipe 8A.It is inner that interior concetrated pipe 13A is located at apparatus casing 4, the built-in guide locating device provided guiding formed with built-in guide-localization connecting plate 5A and built-in guide-localization round key 5B, arranges number row rod baffle 12 between longitudinal fin heat-exchanging tube bundle 10A.Apparatus casing 4 top is provided with gas approach 2A, and bottom is provided with exhanst gas outlet 1B.
See Fig. 1, high temperature circulation slurry oil enters from the tube side mouth of pipe 9, distributes the interlayer entering heat-exchanging tube bundle 10 and sleeve pipe through outer bobbin carriage 8, then to other end flowing and with the deaerated water heat exchange of shell side, circulation slurry oil is gathered by interior bobbin carriage 13 after reducing temperature, discharges through interior pipe 7.Deaerated water enters from deaerated water import 2, upwards flows with the heat exchange of high temperature circulation slurry oil, part deaerated water vaporize through heat-exchanging tube bundle 10 shell side and outer tube 11, and steam water interface continues upwards to flow finally to discharge from moisture outlet 1A.High temperature circulation slurry oil also can enter from interior pipe 7 and discharge from the tube side mouth of pipe 9.
See Fig. 2, high temperature circulation slurry oil enters from the tube side mouth of pipe 9, distributes the interlayer entering heat-exchanging tube bundle 10 and sleeve pipe through outer bobbin carriage 8, then to other end flowing and with the deaerated water heat exchange of shell side, circulation slurry oil is gathered by interior bobbin carriage 13 after reducing temperature, discharges through interior pipe 7.Deaerated water enters from deaerated water import 2, deaerated water makes part deaerated water vaporize through heat-exchanging tube bundle 10 shell side and outer tube 11 with the heat exchange of high temperature circulation slurry oil, steam bubble upwards flows and departs from the water surface and enter upper space and carry out carbonated drink sedimentation separation, and then steam enters top carbonated drink segregation section 15 and discharges from steam (vapor) outlet 1 after dehydration further.High temperature circulation slurry oil also can enter from interior pipe 7 and discharge from the tube side mouth of pipe 9.
See Fig. 3, high temperature circulation slurry oil enters from interior pipe 7, upwards flows into interior bobbin carriage 13, the interlayer entering heat-exchanging tube bundle 10 and sleeve pipe is distributed through interior bobbin carriage 13, then flow downward and with the deaerated water heat exchange of shell side, circulation slurry oil is gathered by outer bobbin carriage 8 after reducing temperature, discharges through the tube side mouth of pipe 9.Deaerated water enters from deaerated water import 2, apparatus casing 4 and heat-exchanging tube bundle 10 bottom is transported to through external down pipe 3, then upwards flow at heat-exchanging tube bundle 10 shell side, with the heat exchange of high temperature circulation slurry oil, part deaerated water is vaporized, steam bubble upwards flows and departs from the carbonated drink segregation section 15 that the water surface enters top and carry out carbonated drink sedimentation separation, continues upwards to flow to discharge from steam (vapor) outlet 1 after silk screen 6 further dehydration.High temperature circulation slurry oil also can enter from the tube side mouth of pipe 9 and discharge from interior pipe 7.
See Fig. 4, saturated vapor enters interior concetrated pipe 13A from interior pipe 7, enters longitudinal fin heat-exchanging tube bundle 10A and sleeve pipe interlayer through distributing and upwards flows, with the high-temperature flue gas countercurrent flow of shell side, vapor (steam) temperature enters outer concetrated pipe 8A after raising, and discharges through the tube side mouth of pipe 9.High-temperature flue gas enters from gas approach 2A, flows downward at the shell side of longitudinal fin heat-exchanging tube bundle 10A, and with saturated vapor heat exchange, temperature is discharged from exhanst gas outlet 1B after reducing.
Claims (9)
1. a high temperature resistant single tube journey heat-exchange method, comprise tube side medium to enter, through heat-exchanging tube bundle and shell side media for heat exchange, again through gathering and discharging, it is characterized in that: tube side medium enters the external bobbin carriage of an independent completion, after heat-exchanging tube bundle and shell side media for heat exchange, enters the built-in bobbin carriage of an independent completion, be communicated with through the outer tube of a sleeve pipe between built-in bobbin carriage with external bobbin carriage, external bobbin carriage is stretched out at the inner other end of built-in bobbin carriage in interior pipe one end of sleeve pipe, and the medium of built-in bobbin carriage is discharged by the interior pipe of sleeve pipe.
2. high temperature resistant single tube journey heat-exchange method according to claim 1, is characterized in that: can also enter built-in bobbin carriage through interior pipe by tube side medium, discharge after heat-exchanging tube bundle and shell side media for heat exchange through external bobbin carriage.
3. a high temperature resistant single tube pass heat exchanger, comprise apparatus casing, outer bobbin carriage, interior bobbin carriage, tubulation or coiled pipe or spiral element heat-exchanging tube bundle, sleeve pipe, sleeve pipe is made up of inner and outer tubes, be arranged on heat-exchanging tube bundle center or eccentric position, heat-exchanging tube bundle and outer tube one end are connected with outer bobbin carriage or outer concetrated pipe, the other end is connected with interior bobbin carriage or interior concetrated pipe, the inner end of interior pipe is inner at interior bobbin carriage, outer end passes through outer bobbin carriage or outer concetrated pipe, and interior bobbin carriage or interior concetrated pipe are located at enclosure interior and are connected with guide locating device provided.
4. high temperature resistant single tube pass heat exchanger according to claim 3, is characterized in that: heat exchanger tube is tubulation or bellows or screwed pipe, can also arrange interposer in heat exchanger tube, can also or/and inner side arranges longitudinal fin or ailhead outside heat exchanger tube.
5. high temperature resistant single tube pass heat exchanger according to claim 3, is characterized in that: heat-exchanging tube bundle adopts segmental baffle or double segmental baffle or helical baffles or rod baffle guiding.
6. high temperature resistant single tube pass heat exchanger according to claim 3, is characterized in that: adopt drum type brake housing or autoclave housing, horizontal layout or vertical.
7. high temperature resistant single tube pass heat exchanger according to claim 3, is characterized in that: can also in the inner side of interior pipe or/and arranged outside thermal insulation layer.
8. high temperature resistant single tube pass heat exchanger according to claim 3, is characterized in that: when for arranging carbonated drink separated space, silk screen or grid, drip pan or groove, external down pipe during vertical steam generator scheme.
9. high temperature resistant single tube pass heat exchanger according to claim 3, is characterized in that: guide locating device provided is that outside adjustment is airtight guide locating device provided, comprises nut, stud, stuffing-box, guide-localization key and external seal cover; Or built-in fixed guide locating device provided, comprise guide-localization round key, sleeve pipe and connecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410250821.0A CN105135907A (en) | 2014-06-09 | 2014-06-09 | High-temperature-resistant single-tube-pass heat exchange method and heat exchanger |
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| CN201410250821.0A CN105135907A (en) | 2014-06-09 | 2014-06-09 | High-temperature-resistant single-tube-pass heat exchange method and heat exchanger |
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| CN105135907A true CN105135907A (en) | 2015-12-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000213A (en) * | 2018-08-16 | 2018-12-14 | 江苏永大化工机械有限公司 | Steam generator |
| CN113405376A (en) * | 2021-07-05 | 2021-09-17 | 南京聚拓化工科技有限公司 | Full-counterflow heat recovery device |
| CN114353576A (en) * | 2021-12-17 | 2022-04-15 | 中核武汉核电运行技术股份有限公司 | Water supply heat shield sleeve and water supply heat shield calculation method thereof |
-
2014
- 2014-06-09 CN CN201410250821.0A patent/CN105135907A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000213A (en) * | 2018-08-16 | 2018-12-14 | 江苏永大化工机械有限公司 | Steam generator |
| CN113405376A (en) * | 2021-07-05 | 2021-09-17 | 南京聚拓化工科技有限公司 | Full-counterflow heat recovery device |
| CN114353576A (en) * | 2021-12-17 | 2022-04-15 | 中核武汉核电运行技术股份有限公司 | Water supply heat shield sleeve and water supply heat shield calculation method thereof |
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Application publication date: 20151209 |