CN101684516B - Piecewise heat treatment method of large pressure container - Google Patents
Piecewise heat treatment method of large pressure container Download PDFInfo
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- CN101684516B CN101684516B CN2008101677131A CN200810167713A CN101684516B CN 101684516 B CN101684516 B CN 101684516B CN 2008101677131 A CN2008101677131 A CN 2008101677131A CN 200810167713 A CN200810167713 A CN 200810167713A CN 101684516 B CN101684516 B CN 101684516B
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- pressurized vessel
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 238000009413 insulation Methods 0.000 claims description 21
- 238000003032 molecular docking Methods 0.000 claims description 20
- 238000012856 packing Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- 238000007669 thermal treatment Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000011218 segmentation Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
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- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a piecewise heat treatment method of a large pressure container, which comprises the following steps: building a temporary combustion heating furnace near an installation site of the large pressure container; vertically installing the pressure container section into the combustion heating furnace, setting an inner cavity of the pressure container section into a hearth; butting a combustor with the bottom of the pressure container section; and combusting and heating the pressure container section by using the combustor. Compared with the traditional method for heat treatment by using an industrial furnace, the invention can improve the heat treatment speed to the pressure container section by building the temporary combustion heating furnace to perform the piecewise heat treatment on the pressure container section.
Description
Technical field
The present invention relates to a kind of postweld heat treatment technology, particularly a kind of piecewise heat treatment method of large pressure container.
Background technology
The pressurized vessel postweld heat treatment is the final stage critical process in the pressurized vessel manufacturing processed.The quality of postweld heat treatment directly has influence on the whole inner quality of pressurized vessel, and is different with weld defect, and postweld heat treatment can not be done over again, and thermal treatment length consuming time is expensive also big.The effect of postweld heat treatment is guaranteed by postweld heat treatment technology.Therefore loyal execution postweld heat treatment technology is to guarantee the key of postweld heat treatment effect, the thermal treatment temp homogeneity, and the reasonableness of soaking time, the temperature survey accuracy all is crucial.After finishing, its welding production to carry out whole postweld heat treatment for large pressurized vessel (as the tower in oil, the chemical plant installations), the unrelieved stress that produces when its role is to eliminate assembling with welding, prevent to produce stress corrosion, improve the tissue and the performance of welding joint and heat affected zone, reach reduction hardness, improve plasticity and flexible purpose, further discharge the obnoxious flavour in the weld seam, prevent the generation of the hydrogen embrittlement and the crackle of weld seam, the geometrical dimension of stable container, the work-ing life of improving equipment.
Fig. 1 has shown a kind of traditional heat treating method, promptly small pressure container 11 is put into industrial furnace 10 and heat-treats, and utilizes electric heater or industrial burner that the pressurized vessel 1 in the industrial furnace 10 is heat-treated.
Along with oil, chemical plant installations to large scale development, the diameter of pressurized vessel oneself greater than 5m, length also surpasses 10m, as a 2000m
3The pressurized vessel diameter be greater than 5m, length is wanted tens of rice, this class tun is difficult in the factory to be finished, because so huge pressurized vessel can't whole transport on railway, highway, even transport by sea route, short distance road transit from the harbour to the working-yard also is a difficult problem, and integral hoisting is extremely difficult especially.This class tun generally adopts prefabricated shaping or segmentation manufacturing in factory, assembles at the scene then, welds, and therefore also must carry out at the scene this operation of postweld heat treatment of pressurized vessel.Because the large pressurized vessel volume after the welding is big, therefore prior heat treatment method shown in Figure 1 can not be carried out complete heat treatment to this type of tun, and it is heat-treated piecemeal is a kind of good method that gears to actual circumstances.
If each pressurized vessel segmentation sent in the industrial furnace shown in Figure 1 10 heat-treat, its pressurized vessel section need be placed on the chassis, and the fire door that passes industrial furnace 10 sends in the industrial furnace 10, and its workload is very big.In addition, this is a kind of horizontal heat treating method, because the large pressurized vessel volume is big, weight is big, the pressurized vessel of putting that therefore crouches is very easy to distortion in heat treatment process.
Summary of the invention
The purpose of this invention is to provide a kind of piecewise heat treatment method of large pressure container, the pressurized vessel section of heat-treating by needs is set to burner hearth, has simplified the operation of heat-treating, and carries out the heat treated efficient of segmentation thereby improved; In addition, by the pressurized vessel section of erectting is heat-treated, solve large pressurized vessel yielding problem in thermal treatment.
According to an aspect of the present invention, the piecewise heat treatment method of large pressure container that is provided may further comprise the steps:
The inner chamber of pressurized vessel section is set to burner hearth;
At the peripheral thermal insulation layer that coats of pressurized vessel section;
Burner and the coating thermal insulation layer pressurized vessel section bottom of erect placing sealed dock; And
Utilize burner to the heating of burning of pressurized vessel section.
According to a second aspect of the invention, the piecewise heat treatment method of large pressure container that is provided may further comprise the steps:
Near the large pressurized vessel erecting stage, build an interim combustion heating furnace;
The pressurized vessel section is erect within the combustion heating furnace of packing into;
The inner chamber of pressurized vessel section is set to burner hearth;
Burner sealed with the bottom of pressurized vessel section dock; And
Utilize burner to the heating of burning of pressurized vessel section.
Wherein, the step of building interim combustion heating furnace comprises: at first build the furnace body frame of its diameter greater than pressurized vessel section diameter, in the inboard of furnace body frame the round shape thermal insulation layer is set then, thereby form body of heater; And before described body of heater forms or among forming or after forming, settle the furnace bottom support that is used for the abutment pressure container section in the position that will form body of heater or form body of heater.
Wherein, described furnace body frame is a circular support body that is mutually permanently connected and is formed by a plurality of transverse tubes and vertical tube.
Wherein, the front end of described transverse tube inserts in the thermal insulation layer, so that thermal insulation layer is hanging to the inboard of described circular support body.
Wherein, the step that the pressurized vessel section is erect within the combustion heating furnace of packing into comprises: with crane the setting of pressurized vessel section is placed on the intravital furnace bottom support of stove; And then furnace top cover is added a cover the upper end of body of heater.
Wherein, one of described furnace bottom stent support is used to dock the docking facilities of burner and pressurized vessel section.
Wherein, described docking facilities is a cone-shaped body, and its upper end diameter is less than the diameter of pressurized vessel section, and upper end-face edge is provided with a circle shirt rim, and the shower nozzle diameter of the diameter of its lower end and burner adapts, and makes burner tip dock taper docking facilities lower end.
Wherein, described thermal insulation layer lower end has flanging in the circle, and the shirt rim of described interior flanging and docking facilities is tightly connected.
Wherein, the furnace bottom support comprises the part of abutment pressure container section and the part of support docking facilities.
The present invention has following technique effect:
1, the large pressurized vessel section of erectting is heat-treated, vessel shell is perpendicular to ground, a housing compression chord, and deflection is minimum, thus the pressurized vessel deformation defect of having avoided horizontal thermal treatment to bring;
2, compare with traditional method of utilizing industrial furnace to heat-treat, build interim combustion heating furnace pressurized vessel is carried out segmentation thermal treatment, can improve thermal treatment rate, reduce and build the stove cost;
3, utilize docking facilities to realize docking of pressurized vessel section and burner, can make the flue gas of burner generation act directly on the cylindrical pressure vessel section, produce higher interior pressure and uniform temperature field, the cylindrical pressure vessel section obtains good thermal effectiveness.
The present invention is described in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the synoptic diagram that shows a kind of traditional treatment method that pressurized vessel is heat-treated;
Fig. 2 shows the synoptic diagram of carrying out piecewise heat treatment method of large pressure container of the present invention;
Fig. 3 is the enlarged diagram of interim combustion heating furnace bottom shown in Figure 2.
Embodiment
Large pressurized vessel of the present invention is meant the integral pressure container that can not transport on highway, the diameter of this type of pressurized vessel is generally equal to or greater than 4 meters.
Fig. 2 has shown piecewise heat treatment method of large pressure container of the present invention.Because large pressurized vessel is bulky, so the common sectional construction large pressurized vessel in manufacturing shop, then each section of the pressurized vessel of sectional construction is transported to the erecting stage.Because each section of large pressurized vessel is circular cylinder body, because for convenience of explanation, the present invention is referred to as pressurized vessel section (or pressure container cylinder) 3 with a section of large pressurized vessel.
As shown in Figure 2, piecewise heat treatment method of large pressure container of the present invention may further comprise the steps:
Near the large pressurized vessel erecting stage, build an interim combustion heating furnace 2;
The inner chamber of pressurized vessel section 3 is set to burner hearth;
Burner 26 sealed with the bottom of pressurized vessel section 3 dock; And
Utilize the heating of burning of 26 pairs of pressurized vessel sections 3 of burner.
Therefore the length of pressurized vessel section 3 of the present invention need be utilized large-scale crane that it is hung in the combustion heating furnace 2, and after thermal treatment, by crane it be hung out from combustion heating furnace 2 more usually greater than 10m.
Through after heat treated pressurized vessel section 3 welding assemblies, with electric heater the circumferential weld between section and the section is heat-treated again.For example utilize the track type electric heater that circumferential weld is carried out partial heat treatment.
The step of building interim combustion heating furnace 2 comprises: at first build the furnace body frame 23 of its diameter greater than pressurized vessel section 3 diameters, in the inboard of furnace body frame 23 round shape thermal insulation layer 24 is set then, thereby form body of heater; And before described body of heater forms or among forming or after forming, settle the furnace bottom support 25 that is used for abutment pressure container section 3 in the position that will form body of heater or form body of heater.That is to say, can at any time settle furnace bottom support 25, such as can be before building furnace body frame 23, perhaps furnace body frame 23 build back and thermal insulation layer 24 before being provided with during, perhaps after thermal insulation layer 24 is set, settle furnace bottom support 25 in the position of body of heater that will form or the body of heater that formed.
Build furnace body frame 23 and be similar to the scaffolding of building the construction site, promptly interconnect, form a circular support body with a plurality of transverse tubes and vertical tube.The front end of transverse tube can insert in the thermal insulation layer 24, thereby thermal insulation layer 24 is hanging to the inboard of circular support body, can also reinforce the part of having inserted transverse tube in the thermal insulation layer 24 with small section simultaneously.
Therefore the step that pressurized vessel section 3 is erect within the combustion heating furnace 2 of packing into of the present invention comprises: with crane 3 settings of pressurized vessel section are placed on the furnace bottom support 25 of body of heater; And then furnace top cover 22 is added a cover the upper end of body of heater.
Because pressurized vessel section 3 to be heated is cylindrical shells, does not descend manhole, therefore can not realize that burner 26 docks with the direct of pressurized vessel section 3.For this reason, the present invention has designed one and is used for burner 26 and realizes the docking facilities 27 that sealing is docked with pressurized vessel section 3.
As shown in Figure 3, this docking facilities 27 is a cone-shaped body, and the diameter of its upper end is slightly less than the diameter of pressurized vessel section 3, and upper end-face edge is provided with a circle shirt rim 271, so that pressurized vessel section 3 can be pressed on this shirt rim; The shower nozzle diameter of the diameter of the lower end of this taper docking facilities 27 and burner 26 adapts, make the lower end of burner 26 shower nozzles butt joint taper docking facilities 27, thereby dock with the integral body of burner 26 realization pressurized vessel section 3 bottoms, burner 26 shower nozzles are aimed at the inner chamber of pressurized vessel section 3, flame can rise from furnace bottom like this, the flue gas of bright heat has been full of the inside of pressurized vessel, the heated pressure container.Therefore the present invention has burner and directly docks the burn technique effect of heating of pressurized vessel section.
Certain docking facilities of the present invention 27 also can be designed to other shape, for example bottleneck shape or stairstepping.Need to prove that after connecting burner 26, its docking facilities 27 itself becomes the combustion chamber of the pressure container cylinder bottom that being positioned at waits to burn heats again, this can improve the burning heats.
The interior flanging 241 of thermal insulation layer 24 lower ends is tightly connected with the shirt rim of docking facilities 27, thus the bottom of sealed pressure vessel section 3.
Furnace top cover 22 comprises the chimney 21 that is used to reflect incendiary taper lid and is used to discharge fume.The taper lid can reflect burned flame and flue gas, thereby makes the interior temperature of pressurized vessel section cavity even.
Interim combustion heating furnace 2 of the present invention is preferably built near the large pressurized vessel fabricating yard, can make full use of the large-scale crane that large pressurized vessel is installed like this and come handling pressurized vessel section, thereby increase work efficiency.
The present invention has following technique effect:
1, the large pressurized vessel of erectting is heat-treated, vessel shell is erect ground, a housing compression chord, and deflection is minimum, thus the pressurized vessel deformation defect of having avoided horizontal thermal treatment to bring;
2, compare with traditional method of utilizing industrial furnace to heat-treat, build interim combustion heating furnace the pressurized vessel section is carried out segmentation thermal treatment, can improve thermal treatment rate, reduce and build the stove cost;
3, utilize docking facilities to realize docking of pressurized vessel section and burner, can make the cylindrical pressure vessel section obtain burner directly to heat treated effect.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention all should be understood to fall into protection scope of the present invention.
Claims (8)
1. piecewise heat treatment method of large pressure container may further comprise the steps:
Near building the erecting stage, large pressurized vessel builds an interim combustion heating furnace (2);
Pressurized vessel section (3) is erect within the combustion heating furnace (2) of packing into;
With furnace bottom support (25) abutment pressure container section (3);
The inner chamber of pressurized vessel section (3) is set to burner hearth;
Burner (26) sealed with the bottom of pressurized vessel section (3) dock; And
Utilize burner (26) to pressurized vessel section (3) heating of burning;
Wherein, described furnace bottom support (25) supports a docking facilities (27) that is used to dock burner (26) and pressurized vessel section (3).
2. method according to claim 1, the step of wherein building interim combustion heating furnace (2) comprising:
At first build the furnace body frame (23) of its diameter greater than pressurized vessel section (3) diameter, the inboard of the furnace body frame of being built (23) is provided with round shape thermal insulation layer (24) then, thereby forms body of heater; And
Before described body of heater forms or among forming or after forming, settle the furnace bottom support (25) that is used for abutment pressure container section (3) in the position that will form body of heater or form body of heater.
3. method according to claim 2, wherein said furnace body frame (23) are circular support bodys that is mutually permanently connected and is formed by a plurality of transverse tubes and vertical tube.
4. method according to claim 3, the front end of wherein said furnace body frame transverse tube inserts in the thermal insulation layer (24), so that thermal insulation layer (24) is hanging to the inboard of described circular support body.
5. method according to claim 1 and 2, wherein the step that pressurized vessel section (3) is erect within the combustion heating furnace (2) of packing into comprises:
With crane pressurized vessel section (3) setting is placed on the intravital furnace bottom support of stove (25);
And then furnace top cover (22) is added a cover the upper end of body of heater.
6. method according to claim 1 and 2, wherein said docking facilities (27) is a cone-shaped body, its upper end diameter is less than the diameter of pressurized vessel section (3), and upper end-face edge is provided with a circle shirt rim (271), the shower nozzle diameter of the diameter of its lower end and burner (26) adapts, and makes burner (26) shower nozzle sealing butt joint taper docking facilities (27) lower end.
7. method according to claim 2, wherein said thermal insulation layer (24) lower end have flanging (241) in the circle, and described interior flanging (241) is tightly connected with the shirt rim (271) of docking facilities (27).
8. method according to claim 1 and 2, wherein furnace bottom support (25) comprises the part (251) of abutment pressure container section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101677131A CN101684516B (en) | 2008-09-28 | 2008-09-28 | Piecewise heat treatment method of large pressure container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101677131A CN101684516B (en) | 2008-09-28 | 2008-09-28 | Piecewise heat treatment method of large pressure container |
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| Publication Number | Publication Date |
|---|---|
| CN101684516A CN101684516A (en) | 2010-03-31 |
| CN101684516B true CN101684516B (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101677131A Expired - Fee Related CN101684516B (en) | 2008-09-28 | 2008-09-28 | Piecewise heat treatment method of large pressure container |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109897947B (en) * | 2018-06-05 | 2020-11-06 | 武汉重工铸锻有限责任公司 | Heat treatment method of vertical pressure kettle for deep sea simulation pressure test cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1178248A (en) * | 1997-08-01 | 1998-04-08 | 傅家仁 | Heat treating apparatus for ensembled large size spherical tank |
| CN1178249A (en) * | 1997-08-01 | 1998-04-08 | 傅家仁 | Heat treating method for ensembled large size spherical tank |
| CN1483841A (en) * | 2003-07-28 | 2004-03-24 | 傅家仁 | Integval heat treatment method for large horizontal pressure container |
| CN1483842A (en) * | 2003-07-28 | 2004-03-24 | 傅家仁 | Integral heat treatment method for large pressure container |
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2008
- 2008-09-28 CN CN2008101677131A patent/CN101684516B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1178248A (en) * | 1997-08-01 | 1998-04-08 | 傅家仁 | Heat treating apparatus for ensembled large size spherical tank |
| CN1178249A (en) * | 1997-08-01 | 1998-04-08 | 傅家仁 | Heat treating method for ensembled large size spherical tank |
| CN1483841A (en) * | 2003-07-28 | 2004-03-24 | 傅家仁 | Integval heat treatment method for large horizontal pressure container |
| CN1483842A (en) * | 2003-07-28 | 2004-03-24 | 傅家仁 | Integral heat treatment method for large pressure container |
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| CN101684516A (en) | 2010-03-31 |
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