CN102818469A - 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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- CN102818469A CN102818469A CN201210347843XA CN201210347843A CN102818469A CN 102818469 A CN102818469 A CN 102818469A CN 201210347843X A CN201210347843X A CN 201210347843XA CN 201210347843 A CN201210347843 A CN 201210347843A CN 102818469 A CN102818469 A CN 102818469A
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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 the oil Petrochemical Enterprises catalytic cracking unit.Traditional oil slurry steam generator heat exchanger is made according to the GB151 standard design; Since 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 the bigger oil slurry steam generator of middle super pressure-high temperature and the shell journey temperature difference.This kind equipment is after coming into operation, and within 1 year, what have tube sheet cracking only just takes place 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 mainly is because tube bank in use exists welding stress and thermal (temperature difference) stress, when welding stress and thermal (temperature difference) stress stack have surpassed the allowable stress of tube bank material, will cause tube bank to ftracture.Tube bank begins from initial micro-crack, progressively enlarges, and ftractures until penetrability.Though through extracting tube bank out cracking is carried out the repair welding pressure testing, crackle can't be eradicated, repair welding can only block the surface, and underbead crack still exists.Very short time splits once more after putting into operation, has new crackle simultaneously and produces.Tube bank can only be scrapped after the repair welding several times, causes damp production, has had influence on the normal operation of enterprise, and enterprise is caused bigger economic loss.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point; Thereby a kind of oil slurry steam generator heat exchanger tube and production method thereof are provided, have improved the welding quality and the bonding strength of heat exchanger tube and tube sheet, effectively reduced the welding stress of welding position again; The 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, said oil slurry steam generator heat exchanger tube comprises tube sheet and heat exchanger tube, it is characterized in that: be provided with the pore of perforation in the said tube sheet, the tube sheet end is provided with spherical groove; Said heat exchanger tube is installed in the pore, and heat exchanger tube and tube sheet are welded to connect at spherical groove place.
Said spherical groove cambered surface place diameter of a circle is smaller or equal to the heat exchanger tube wall thickness, greater than 0.7 times of heat exchanger tube wall thickness.
The production method of described oil slurry steam generator heat exchanger tube may further comprise the steps:
A. preheat: before being welded to connect tube sheet and heat exchanger tube are preheated, make tube sheet and heat exchanger tube temperature reach 150 ~ 200 ℃;
B. welding automatically: preheating is welded tube sheet and heat exchanger tube after accomplishing automatically, adopts low speed multiple tracks sequential welding during welding, and welding temperature is 150 ~ 200 ℃;
C. insulation for the first time: the tube bank to forming after the welding completion heats to 660 ± 10 ℃, and programming rate is 20 ~ 50 ℃/h, is incubated 2 ~ 4 hours then;
D. cooling for the first time: cool to 400 ± 10 ℃ after the tube bank insulation is accomplished, cooling rate is 20 ~ 50 ℃/h;
E. insulation for the second time: be warming up to 660 ℃ ± 10 ℃ once more after the tube bank cooling is accomplished, programming rate is 20 ~ 50 ℃/h, is incubated 2 ~ 4 hours then;
F. insulation for the second time: cool to 400 ± 10 ℃ once more after the tube bank insulation is accomplished, cooling rate is 20 ℃ ~ 40 ℃/h;
G. cooling naturally: tube bank cooling once more naturally cools to room temperature after accomplishing.
Compared with present technology 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; The 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.
Description of drawings
Fig. 1 is the tube plate structure sketch map.
Fig. 2 is a 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 will combine the embodiment in the accompanying drawing to further describe:
Shown in Fig. 1 ~ 2, the present invention mainly comprises tube sheet 1 and heat exchanger tube 2.Be provided with the pore 4 of perforation in the said tube sheet 1, tube sheet 1 end is provided with spherical groove 3.Said heat exchanger tube 2 is installed in the pore 4, and heat exchanger tube 2 is welded to connect at spherical groove 3 places with tube sheet 1.
Said spherical groove 3 cambered surfaces place diameter of a circle is smaller or equal to heat exchanger tube 2 wall thickness, greater than 0.7 times of heat exchanger tube 2 wall thickness.
Embodiment one: 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: before being welded to connect tube sheet and heat exchanger tube are preheated, make tube sheet and heat exchanger tube temperature reach 180 ℃.
B. welding automatically: after preheating completion tube sheet and heat exchanger tube are welded automatically, adopt low speed multiple tracks sequential welding during welding, welding temperature is 180 ℃.Used welding rod is conventional welding rod.
C. insulation for the first time: welding heats to 650 ℃ to tube bank after accomplishing, and is incubated 3 hours then, and programming rate is 40 ℃/h.
D. cooling for the first time: cool to 410 ℃ after the tube bank insulation is accomplished, cooling rate is 40 ℃/h.
E. insulation for the second time: be warming up to 650 ℃ once more after the tube bank cooling is accomplished, be incubated 3 hours then, programming rate is 40 ℃/h.
F. insulation for the second time: cool to 410 ℃ once more after the tube bank insulation is accomplished, cooling rate is 40 ℃/h.
G. cooling naturally: tube bank cooling once more naturally cools to room temperature after accomplishing.
Embodiment two: 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: before being welded to connect tube sheet and heat exchanger tube are preheated, make tube sheet and heat exchanger tube temperature reach 160 ℃.
B. welding automatically: after preheating completion tube sheet and heat exchanger tube are welded automatically, adopt low speed multiple tracks sequential welding during welding, welding temperature is 160 ℃.
C. insulation for the first time: welding heats to 660 ℃ to tube bank after accomplishing, and is incubated 2 hours then, and programming rate is 30 ℃/h.
D. cooling for the first time: cool to 420 ℃ after the tube bank insulation is accomplished, cooling rate is 30 ℃/h.
E. insulation for the second time: be warming up to 660 ℃ once more after the tube bank cooling is accomplished, be incubated 2 hours then, programming rate is 30 ℃/h.
F. insulation for the second time: cool to 420 ℃ once more after the tube bank insulation is accomplished, cooling rate is 30 ℃/h.
G. cooling naturally: tube bank cooling once more naturally cools to room temperature after accomplishing.
The present invention had both improved the welding quality and the bonding strength of heat exchanger tube 2 and tube sheet 1; Effectively reduce the post-weld stress of welding position again, improved the fatigue resistance and the thermal stress resistance ability of welding position 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 (3)
1. an oil slurry steam generator heat exchanger tube comprises tube sheet (1) and heat exchanger tube (2), it is characterized in that: be provided with the pore (4) of perforation in the said tube sheet (1), tube sheet (1) end is provided with spherical groove (3); Said heat exchanger tube (2) is installed in the pore (4), and heat exchanger tube (2) is located to be welded to connect at spherical groove (3) with tube sheet (1).
2. oil slurry steam generator heat exchanger tube as claimed in claim 1 is characterized in that: said spherical groove (3) cambered surface place diameter of a circle is smaller or equal to heat exchanger tube (2) wall thickness, greater than 0.7 times of heat exchanger tube (2) wall thickness.
3. the production method of an oil slurry steam generator heat exchanger tube as claimed in claim 1 is characterized in that, may further comprise the steps:
A. preheat: before being welded to connect tube sheet (1) and heat exchanger tube (2) are preheated, make tube sheet (1) and heat exchanger tube (2) temperature reach 150 ~ 200 ℃;
B. welding automatically: preheating is welded tube sheet (1) and heat exchanger tube (2) after accomplishing automatically, adopts low speed multiple tracks sequential welding during welding, and welding temperature is 150 ~ 200 ℃;
C. insulation for the first time: the tube bank to forming after the welding completion heats to 660 ± 10 ℃, and programming rate is 20 ~ 50 ℃/h, is incubated 2 ~ 4 hours then;
D. cooling for the first time: cool to 400 ± 10 ℃ after the tube bank insulation is accomplished, cooling rate is 20 ~ 50 ℃/h;
E. insulation for the second time: be warming up to 660 ℃ ± 10 ℃ once more after the tube bank cooling is accomplished, programming rate is 20 ~ 50 ℃/h, is incubated 2 ~ 4 hours then;
F. insulation for the second time: cool to 400 ± 10 ℃ once more after the tube bank insulation is accomplished, cooling rate is 20 ℃ ~ 40 ℃/h;
G. cooling naturally: tube bank cooling once more naturally cools to room temperature after accomplishing.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 true CN102818469A (en) | 2012-12-12 |
| CN102818469B CN102818469B (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210347843 Active 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114001584A (en) * | 2020-07-28 | 2022-02-01 | 杭州科百特过滤器材有限公司 | Tube plate sintering method of heat exchanger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009063679A1 (en) * | 2007-11-15 | 2009-05-22 | Mitsubishi Electric Corporation | Heat exchanger and heat pump system |
| 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 |
-
2012
- 2012-09-18 CN CN 201210347843 patent/CN102818469B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009063679A1 (en) * | 2007-11-15 | 2009-05-22 | Mitsubishi Electric Corporation | Heat exchanger and heat pump system |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114001584A (en) * | 2020-07-28 | 2022-02-01 | 杭州科百特过滤器材有限公司 | Tube plate sintering method of heat exchanger |
| 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 |
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| CN102818469B (en) | 2013-12-18 |
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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. |