CN202836299U - Tube bundle for oil slurry vapor generator and heat exchanger - Google Patents
Tube bundle for oil slurry vapor generator and heat exchanger Download PDFInfo
- Publication number
- CN202836299U CN202836299U CN 201220477903 CN201220477903U CN202836299U CN 202836299 U CN202836299 U CN 202836299U CN 201220477903 CN201220477903 CN 201220477903 CN 201220477903 U CN201220477903 U CN 201220477903U CN 202836299 U CN202836299 U CN 202836299U
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- tube
- heat exchanger
- oil slurry
- vapor generator
- welding
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Abstract
The utility model relates to a tube bundle for an oil slurry vapor generator and heat exchanger and belongs to the technical field of the chemical equipment. The tube bundle for the oil slurry vapor generator and heat exchanger comprises a tube plate and a heat exchanging tube. A through tube hole is arranged inside the tube plate. The end portion of the tube plate is provided with a ball-shape split opening. The heat exchanging tube is arranged in the tube hole. The heat exchanging tube is connected with the tube plate in a welding mode in the ball-shape split opening place. The tube bundle for the oil slurry vapor generator and heat exchanger is simple, contact and reasonable in structure, guarantees that the tube plate and the heat exchanging tube are fully welded, effectively reduces the welding stress of the welding position, greatly improves the fatigue resistance intensity degree and the heat stress resistance capability of the welding position, prolongs service life of the tube bundle, enables the oil slurry vapor generator and heat exchanger to safely and continuously be operated, reduces maintenance frequency and finally improves productivity benefit.
Description
Technical field
The utility model relates to a kind of oil slurry steam generator heat exchanger tube, belongs to technical field of chemical.
Background technology
The oil slurry steam generator heat exchanger is one of key equipment in the oil refining enterprise 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 larger 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 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 mainly is 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 progressively enlarges from initial micro-crack, until the penetrability cracking.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 simultaneously new crackle 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 larger economic loss.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thereby provide a kind of oil slurry steam generator heat exchanger tube, improved the bonding strength of heat exchanger tube and tube sheet, effectively eliminate again the welding stress of welding position, improved greatly fatigue resistance and the thermal stress resistance ability of welding position, 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 the technical scheme that the utility model provides, the 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 described tube sheet, the tube sheet end is provided with spherical groove.Described heat exchanger tube is installed in the 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, greater than 0.7 times of heat exchanger tube wall thickness.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Guarantee tube sheet and heat exchanger tube complete penetraction and fusion in welding, 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.
Description of drawings
Fig. 1 is the tube plate structure schematic diagram.
Fig. 2 is the utility model structural representation.
Description of reference numerals: 1-tube sheet, 2-heat exchanger tube, the spherical groove of 3-, 4-pore.
The specific embodiment
Following the utility model is further described in connection with the embodiment in the accompanying drawing:
Shown in Fig. 1 ~ 2, the utility model mainly comprises tube sheet 1 and heat exchanger tube 2.
Be provided with the pore 4 of perforation in the described tube sheet 1, tube sheet 1 end is provided with spherical groove 3.Described 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.
Be welded to connect front preheating, preheat temperature is between 150 ℃-200 ℃.Adopt automatic welding, low speed multiple tracks sequential welding, the welding overall process keeps carrying out twice heat treatment after welding is finished between 150 ℃-200 ℃ of the temperature.The heat treatment temperature programming rate is 50 ℃/h for the first time, is warming up to 660 ± 10 ℃, is incubated 2-4 hour, then cools to 400 ℃, and cooling rate is 20 ℃ of-50 ℃/h.Carry out secondary temperature elevation to 660 after cooling is finished ± 10 ℃, be incubated and cool to 400 ℃ after 2-4 hour, cooling rate is 20-40 ℃/h.Tube bank naturally cools to room temperature behind the reducing temperature twice.
Described spherical groove 3 cambered surface place diameter of a circles are less than or equal to heat exchanger tube 2 wall thickness, greater than 0.7 times of heat exchanger tube 2 wall thickness.
The utility model 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. 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 described tube sheet (1), tube sheet (1) end is provided with spherical groove (3); Described 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: described spherical groove (3) cambered surface place diameter of a circle is less than or equal to heat exchanger tube (2) wall thickness, greater than 0.7 times of heat exchanger tube (2) wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477903 CN202836299U (en) | 2012-09-18 | 2012-09-18 | Tube bundle for oil slurry vapor generator and heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477903 CN202836299U (en) | 2012-09-18 | 2012-09-18 | Tube bundle for oil slurry vapor generator and heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202836299U true CN202836299U (en) | 2013-03-27 |
Family
ID=47947986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220477903 Expired - Fee Related CN202836299U (en) | 2012-09-18 | 2012-09-18 | Tube bundle for oil slurry vapor generator and heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202836299U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818469A (en) * | 2012-09-18 | 2012-12-12 | 无锡鼎邦换热设备有限公司 | Tube bundle of heat exchanger of slurry oil vapor generator and production method of tube bundle |
| CN110682024A (en) * | 2019-09-29 | 2020-01-14 | 鲁西工业装备有限公司 | Method for welding heat exchange tube and tube plate and application thereof |
-
2012
- 2012-09-18 CN CN 201220477903 patent/CN202836299U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818469A (en) * | 2012-09-18 | 2012-12-12 | 无锡鼎邦换热设备有限公司 | Tube bundle of heat exchanger of slurry oil vapor generator and production method of tube bundle |
| CN102818469B (en) * | 2012-09-18 | 2013-12-18 | 无锡鼎邦换热设备有限公司 | Tube bundle of heat exchanger of slurry oil vapor generator and production method of tube bundle |
| CN110682024A (en) * | 2019-09-29 | 2020-01-14 | 鲁西工业装备有限公司 | Method for welding heat exchange tube and tube plate and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20180918 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |