CN102818469B - Tube bundle of heat exchanger of slurry oil vapor generator and production method of tube bundle - Google Patents
Tube bundle of heat exchanger of slurry oil vapor generator and production method of tube bundle Download PDFInfo
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- CN102818469B CN102818469B CN 201210347843 CN201210347843A CN102818469B CN 102818469 B CN102818469 B CN 102818469B CN 201210347843 CN201210347843 CN 201210347843 CN 201210347843 A CN201210347843 A CN 201210347843A CN 102818469 B CN102818469 B CN 102818469B
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Abstract
The invention relates to a tube bundle of a heat exchanger of a slurry oil vapor generator and a production method of the tube bundle, belonging to the technical field of chemical equipment. The tube bundle of the heat exchanger of the slurry oil vapor generator comprises a tube board and a heat exchange tube, wherein a through tube hole is formed inside the tube board; and a spherical groove is arranged at the end part of the tube board; the heat exchange tube is mounted in the tube hole; and the heat exchange tube and the tube board are welded together at the spherical groove. The production method of the tube bundle of the heat exchanger of the slurry oil vapor generator comprises the following steps of pre-heating, automatic welding, primary thermal insulation, secondary thermal insulation, secondary cooling and natural cooling. The tube bundle of the heat exchanger of the slurry oil vapor generator provided by the invention is simple, compact and reasonable in structure; a welding strain of a welding part can be effectively reduced; anti-fatigue strength and anti-heat strain capability of the welding part can be greatly improved; the service life of the tube bundle is prolonged, so that the heat exchanger of the slurry oil vapor generator is safe and continuous to operate; and the maintenance frequency is reduced, and the productivity effect is finally improved.
Description
Technical field
The present invention relates to a kind of oil slurry steam generator heat exchanger tube and production method thereof, belong to technical field of chemical.
Background technology
The oil slurry steam generator heat exchanger is one of key equipment in oil refining enterprise catalytic cracking unit.Traditional oil slurry steam generator heat exchanger is manufactured according to the GB151 standard design, due in the GB151 standard for the groove of tube sheet and comparatively general with heat exchanger tube type of attachment regulation, applied widely, do not stipulate special requirement for the tube bank of middle super pressure-high temperature and the larger oil slurry steam generator of the shell journey temperature difference.This kind equipment is after coming into operation, and within 1 year, what have tube sheet cracking only just occurs about three months, and it is radial, random that crackle becomes, and causes the shell journey to be ganged up, and steam and oil are sneaked into mutually.Tube bank cracking is mainly because tube bank in use exists welding stress and thermal (temperature difference) stress, when welding stress has surpassed the allowable stress of Bundle material with the thermal (temperature difference) stress stack, will cause tube bank to ftracture.Tube bank, from initial micro-crack, progressively enlarges, until the penetrability cracking.Though through extracting tube bank out, cracking is carried out to the repair welding pressure testing, crackle can't be eradicated, repair welding can only block surface, and underbead crack still exists.After putting into operation, very short time splits once more, has new crackle simultaneously and produces.After repair welding, tube bank can only be scrapped several times, causes damp production, has had influence on the normal operation of enterprise, and enterprise is caused to larger economic loss.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, thereby provide a kind of oil slurry steam generator heat exchanger tube and production method thereof, welding quality and the bonding strength of heat exchanger tube and tube sheet have been improved, effectively reduced again the welding stress of welding position, fatigue resistance and the thermal stress resistance ability of welding position have been improved greatly, can prevent the tube bank cracking, improve and restrain service life, make the operation of oil slurry steam generator heat exchanger safe and continuous, reduce maintenance frequency, finally improve productivity effect.
According to technical scheme provided by the invention, described oil slurry steam generator heat exchanger tube, comprise tube sheet and heat exchanger tube, it is characterized in that: be provided with the pore of perforation in described tube sheet, the tube sheet end is provided with spherical groove; Described heat exchanger tube is arranged in pore, and heat exchanger tube and tube sheet are welded to connect at spherical groove place.
Described spherical groove cambered surface place diameter of a circle is less than or equal to the heat exchanger tube wall thickness, is greater than 0.7 times of heat exchanger tube wall thickness.
The production method of described oil slurry steam generator heat exchanger tube comprises the following steps:
A. preheat: be welded to connect and front tube sheet and heat exchanger tube preheated, make tube sheet and heat exchanger tube temperature reach 150 ~ 200 ℃;
B. automatic welding: after preheating completes, tube sheet and heat exchanger tube are carried out to automatic welding, adopt low speed multiple tracks sequential welding during welding, welding temperature is 150 ~ 200 ℃;
C. insulation for the first time: after welding is completed, the tube bank of formation heats to 660 ± 10 ℃, and programming rate is 20 ~ 50 ℃/h, then is incubated 2 ~ 4 hours;
D. cooling for the first time: cool to 400 ± 10 ℃ after tube bank has been incubated, cooling rate is 20 ~ 50 ℃/h;
E. insulation for the second time: tube bank is warming up to 660 ℃ ± 10 ℃ after having lowered the temperature again, and programming rate is 20 ~ 50 ℃/h, then is incubated 2 ~ 4 hours;
F. insulation for the second time: again cool to 400 ± 10 ℃ after tube bank has been incubated, cooling rate is 20 ℃ ~ 40 ℃/h;
G. naturally cooling: tube bank naturally cools to room temperature after again having lowered the temperature.
Compared with the prior art the present invention has the following advantages: the present invention is simple, compact and reasonable for structure; Effectively reduced the welding stress of welding position; Fatigue resistance and the thermal stress resistance ability of welding position have been improved greatly; Improved tube bank service life, made the operation of oil slurry steam generator heat exchanger safe and continuous; Reduce maintenance frequency, finally improve productivity effect.
The accompanying drawing explanation
Fig. 1 is the tube plate structure schematic diagram.
Fig. 2 is structural representation of the present invention.
Description of reference numerals: 1-tube sheet, 2-heat exchanger tube, the spherical groove of 3-, 4-pore.
The specific embodiment
Following the present invention is further described in connection with the embodiment in accompanying drawing:
As shown in Figure 1 and 2, the present invention mainly comprises tube sheet 1 and heat exchanger tube 2.Be provided with the pore 4 of perforation in described tube sheet 1, tube sheet 1 end is provided with spherical groove 3.Described heat exchanger tube 2 is arranged in pore 4, and heat exchanger tube 2 is welded to connect at spherical groove 3 places with tube sheet 1.
Described spherical groove 3 cambered surface place diameter of a circles are less than or equal to heat exchanger tube 2 wall thickness, are greater than 0.7 times of heat exchanger tube 2 wall thickness.
Embodiment mono-: the welded pipe board diameter is 1600mm; Welding heat exchanger tube diameter is 32mm, and the heat exchanger tube wall thickness is 3mm; Spherical groove cambered surface place diameter of a circle is 2.5mm.
A. preheat: be welded to connect and front tube sheet and heat exchanger tube preheated, make tube sheet and heat exchanger tube temperature reach 180 ℃.
B. automatic welding: preheated and rear tube sheet and heat exchanger tube have been carried out to automatic welding, adopted low speed multiple tracks sequential welding during welding, welding temperature is 180 ℃.Welding rod used is conventional welding rod.
C. insulation for the first time: welded and rear tube bank has been heated to 650 ℃, then be incubated 3 hours, programming rate is 40 ℃/h.
D. cooling for the first time: cool to 410 ℃ after tube bank has been incubated, cooling rate is 40 ℃/h.
E. insulation for the second time: tube bank is warming up to 650 ℃ after having lowered the temperature again, then is incubated 3 hours, and programming rate is 40 ℃/h.
F. insulation for the second time: again cool to 410 ℃ after tube bank has been incubated, cooling rate is 40 ℃/h.
G. naturally cooling: tube bank naturally cools to room temperature after again having lowered the temperature.
Embodiment bis-: the welded pipe board diameter is 1500mm; Welding heat exchanger tube diameter is 32mm, and the heat exchanger tube wall thickness is 3mm; Spherical groove cambered surface place diameter of a circle is 2.8mm.
A. preheat: be welded to connect and front tube sheet and heat exchanger tube preheated, make tube sheet and heat exchanger tube temperature reach 160 ℃.
B. automatic welding: preheated and rear tube sheet and heat exchanger tube have been carried out to automatic welding, adopted low speed multiple tracks sequential welding during welding, welding temperature is 160 ℃.
C. insulation for the first time: welded and rear tube bank has been heated to 660 ℃, then be incubated 2 hours, programming rate is 30 ℃/h.
D. cooling for the first time: cool to 420 ℃ after tube bank has been incubated, cooling rate is 30 ℃/h.
E. insulation for the second time: tube bank is warming up to 660 ℃ after having lowered the temperature again, then is incubated 2 hours, and programming rate is 30 ℃/h.
F. insulation for the second time: again cool to 420 ℃ after tube bank has been incubated, cooling rate is 30 ℃/h.
G. naturally cooling: tube bank naturally cools to room temperature after again having lowered the temperature.
The present invention had both improved welding quality and the bonding strength of heat exchanger tube 2 and tube sheet 1, effectively reduced again the post-weld stress of welding position, fatigue resistance and the thermal stress resistance ability of welding position have been improved greatly, can prevent the tube bank cracking, improve and restrain service life, make the operation of oil slurry steam generator heat exchanger safe and continuous, reduce maintenance frequency, finally improve productivity effect.
Claims (2)
1. the production method of an oil slurry steam generator heat exchanger tube, described oil slurry steam generator heat exchanger tube, comprise tube sheet (1) and heat exchanger tube (2), be provided with the pore (4) of perforation in described tube sheet (1), tube sheet (1) end is provided with spherical groove (3); Described heat exchanger tube (2) is arranged in pore (4), and heat exchanger tube (2) is located to be welded to connect at spherical groove (3) with tube sheet (1); It is characterized in that, said method comprising the steps of:
A. preheat: be welded to connect and front tube sheet (1) and heat exchanger tube (2) preheated, make tube sheet (1) and heat exchanger tube (2) temperature reach 150 ~ 200 ℃;
B. automatic welding: after preheating completes, tube sheet (1) and heat exchanger tube (2) are carried out to automatic welding, adopt low speed multiple tracks sequential welding during welding, welding temperature is 150 ~ 200 ℃;
C. insulation for the first time: after welding is completed, the tube bank of formation heats to 660 ± 10 ℃, and programming rate is 20 ~ 50 ℃/h, then is incubated 2 ~ 4 hours;
D. cooling for the first time: cool to 400 ± 10 ℃ after tube bank has been incubated, cooling rate is 20 ~ 50 ℃/h;
E. insulation for the second time: tube bank is warming up to 660 ℃ ± 10 ℃ after having lowered the temperature again, and programming rate is 20 ~ 50 ℃/h, then is incubated 2 ~ 4 hours;
F. cooling for the second time: again cool to 400 ± 10 ℃ after tube bank has been incubated, cooling rate is 20 ℃ ~ 40 ℃/h;
G. naturally cooling: tube bank naturally cools to room temperature after again having lowered the temperature.
2. the production method of oil slurry steam generator heat exchanger tube as claimed in claim 1, it is characterized in that: described spherical groove (3) cambered surface place diameter of a circle is less than or equal to heat exchanger tube (2) wall thickness, is greater than 0.7 times of heat exchanger tube (2) wall thickness.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210347843 CN102818469B (en) | 2012-09-18 | 2012-09-18 | Tube bundle of heat exchanger of slurry oil vapor generator and production method of tube bundle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210347843 CN102818469B (en) | 2012-09-18 | 2012-09-18 | Tube bundle of heat exchanger of slurry oil vapor generator and production method of tube bundle |
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| CN102818469A CN102818469A (en) | 2012-12-12 |
| CN102818469B true CN102818469B (en) | 2013-12-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104729083A (en) * | 2013-12-23 | 2015-06-24 | 博世热力技术（上海）有限公司 | Heat-pump water heater and production method thereof |
| CN114001584B (en) * | 2020-07-28 | 2024-02-20 | 杭州科百特过滤器材有限公司 | Tube plate sintering method of heat exchanger |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201327343Y (en) * | 2008-12-26 | 2009-10-14 | 大连合盛换热器科技开发有限公司 | Thread jointed structure between heat exchange tube and tube plate of heat exchanger |
| CN202403607U (en) * | 2012-01-19 | 2012-08-29 | 江苏普格机械有限公司 | Connecting structure between heat exchange tube head and tube plate in waste heat boiler |
| CN202836299U (en) * | 2012-09-18 | 2013-03-27 | 无锡鼎邦换热设备有限公司 | Tube bundle for oil slurry vapor generator and heat exchanger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4962278B2 (en) * | 2007-11-15 | 2012-06-27 | 三菱電機株式会社 | Heat exchanger and heat pump system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201327343Y (en) * | 2008-12-26 | 2009-10-14 | 大连合盛换热器科技开发有限公司 | Thread jointed structure between heat exchange tube and tube plate of heat exchanger |
| CN202403607U (en) * | 2012-01-19 | 2012-08-29 | 江苏普格机械有限公司 | Connecting structure between heat exchange tube head and tube plate in waste heat boiler |
| CN202836299U (en) * | 2012-09-18 | 2013-03-27 | 无锡鼎邦换热设备有限公司 | Tube bundle for oil slurry vapor generator and heat exchanger |
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| CN102818469A (en) | 2012-12-12 |
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Address after: 214104 yyanshan Road, No. 29, anzhen Town, Xishan District, Wuxi, Jiangsu Patentee after: Wuxi Ding Bang heat exchange equipment Limited by Share Ltd Address before: No. 10, yroshan Road, anzhen Town, Xishan District, Wuxi, Jiangsu Patentee before: Wuxi Dingbang Heat Exchange Equipment Co., Ltd. |
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