CN103332651A - Method for preventing harp-type converter lower gas collection branch tube from thermal deformation - Google Patents
Method for preventing harp-type converter lower gas collection branch tube from thermal deformation Download PDFInfo
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- CN103332651A CN103332651A CN2013102506367A CN201310250636A CN103332651A CN 103332651 A CN103332651 A CN 103332651A CN 2013102506367 A CN2013102506367 A CN 2013102506367A CN 201310250636 A CN201310250636 A CN 201310250636A CN 103332651 A CN103332651 A CN 103332651A
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- harp
- heat radiation
- gas collection
- branch tube
- heat dissipating
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Abstract
The invention relates to a method for preventing a harp-type converter lower gas collection branch tube from thermal deformation. The method is characterized by comprising the following steps of: respectively sleeving heat radiation sleeves on harp connecting tubes of a converter, wherein the heat radiation sleeves comprise heat radiation rings which are sleeved close to the outer walls of the harp connecting tubes and a plurality of convex heat radiation fins which are arranged along the length directions of the outer side walls of the heat radiation rings, the heat radiation fins are arranged in a radial pattern relative to the heat radiation ring at intervals, and moreover the lower ends of the heat radiation rings are adhered to the lower gas collection branch tube. Compared with the prior art, the method solves the problems of thermal deformation factors of the lower gas collection branch tube and partial high temperature of the lower gas collection branch tube, and the temperature of the lower gas collection branch tube trends to be uniform, so that the problem of vertical thermal deformation in the operation of the harp-type converter lower gas collection branch tube is solved from the source, and meanwhile the material temperature of a high-temperature area is decreased, the allowable stress of the material is increased, and the security of a device is improved.
Description
Technical field
The present invention relates to the hydrocarbon steam conversion stove in the petrochemical unit, specifically refer to a kind of method of avoiding the thermal distortion of harp arrangement converter next part gas branch pipe.
Background technology
Existing hydrocarbon steam conversion stove is one of of paramount importance equipment in the petrochemical units such as synthetic ammonia, methyl alcohol, hydrogen manufacturing, and the converter piping is the key position of whole converter, and it comprises distribution piping, goes up pigtail, reformer tube, outlet manifold and following gas gathering manifold.The type of attachment of reformer tube and outlet manifold has dual mode usually: harp arrangement is direct insertion and band down pigtail pipe formula.This dual mode cuts both ways, and all has many covering devices to adopt at home and abroad.Wherein harp arrangement has simple in structure, little, the low power consumption and other advantages of investment and more and more is subjected to the high praise of each technology company, designing unit and manufacturing enterprise both at home and abroad.
The chemical plant installations of existing all employing harp arrangement converter pipings, for example two of 400,000 tons of/year methanol devices of Lu skyization, 300,000 tons of/year synthetic ammonia installations of Hubei fertilizer plant, Shanghai Gaoqiao cover device for producing hydrogen, Hainan refinery device for producing hydrogen, West Pacific Ocean, Dalian device for producing hydrogen etc., under operational stage, occur all that the converter outlet manifold is hot upwards to arch upward, produce the phenomenon of excessive deformation.The major cause that produces this phenomenon is that the existing temperature difference in top and bottom of outlet manifold causes, and learns that from field measurement the temperature difference maximum between outlet manifold top and the bottom can reach 70 ℃.The major cause that causes outlet manifold top and the bottom temperature difference is that the bottom thermal radiation of inhomogeneous, converter, effuser top and the bottom of outlet manifold interior lining exists reasons such as heat waste difference, and above problem is inevitable in this type of converter.Outlet manifold excessively upwards arches upward, and can cause the thermal distortion of outlet manifold interior lining, crackle occurs or comes off.The tapping stress that excessive deformation also can make conversion tube be connected with outlet manifold suddenly increases, and makes perforate present ovalization.Since the hydrogen-rich gas temperature in the outlet manifold about 800 ℃～900 ℃, pressure is the 2.65MPa(gauge pressure).Hydrogen-rich gas directly contacts with the outlet manifold outer wall at lining crackle or the position that comes off, cause overtemperature of tube wall (the outlet manifold material is generally 16Mn), go down for a long time and will cause tube wall to break, cause the High Temperature High Pressure hydrogen-rich gas to leak, even meet naked light and set off an explosion, there are major safety risks.Therefore, after above problem appears in domestic these devices in process of production, just have to stop, repair lining, and rectification herein, repair and generally be difficult to carry out, need take a long time, manufacturing enterprise has been caused enormous economic loss.
For this reason, Granted publication number discloses " a kind of method of eliminating harp type converting kiln lower gas collector heat distortion " for the Chinese invention patent application of CN101481087B, it is by arranging elastic spacing one between the crossbeam bottom the radiation chamber of converter and outlet manifold, the excessive deformation that upwards arches upward that produces when offsetting harp type converting kiln lower gas collector heat distortion, the elastic force direction of described elastic spacing one is opposite with the deformation direction of outlet manifold, and the deformation stress of the outlet manifold at the maximum outer elastic force that described elastic spacing one produces and place, its present position is suitable.This technical scheme reaches the thermal distortion of eliminating harp arrangement converter next part gas branch pipe by introducing elastic spacing one, though it has eliminated the thermal distortion of next part gas branch pipe, but can not solve the problem of next part gas branch pipe localized hyperthermia, be that it does not have to eliminate the generation reason that causes the thermal distortion of next part gas branch pipe, and two power interact, cause the further increase of this regional stress, can cause breaking of outlet manifold when serious, shorten the work-ing life of outlet manifold.
Summary of the invention
Technical problem to be solved by this invention is that the present situation at prior art provides a kind of method of avoiding the thermal distortion of harp arrangement converter next part gas branch pipe from the source, to reduce the stress concentration that outlet manifold localized hyperthermia is caused, use purpose of safety thereby reach the work-ing life, the assurance that prolong the next part gas branch pipe.
The present invention solves the problems of the technologies described above the technical scheme that adopts: this is avoided the method for harp arrangement converter next part gas branch pipe thermal distortion, it is characterized in that: on each harp pipe connecting of converter, be arranged with the heat radiation external member respectively, described heat radiation external member comprises the sheathed heat dissipating ring of each described harp pipe connecting outer wall that reclining, with the radiating fin along the multi-disc evagination that arranges on the described heat dissipating ring outer side wall length direction, these radiating fins are radial with respect to the axis of described heat dissipating ring and are spaced, and the lower end of described heat dissipating ring abuts on the next part gas branch pipe.
The described heat radiation external member of described heat radiation external member adopts aluminum to be equipped with.
Installation and maintenance of this heat radiation external member for convenience, described heat dissipating ring can comprise two semi-rings, is respectively equipped with flanged plate on the ora terminalis of two semi-rings, forms the heat radiation external member thereby by bolt flanged plate corresponding on two semi-rings is linked together.
Preferably, the wall thickness of described heat dissipating ring is the 3-10 millimeter, and the height of described heat dissipating ring is the 30-300 millimeter, and the thickness of described radiating fin is the 2-8 millimeter, and the width of described radiating fin is the 10-40 millimeter, and adjacent described radiating fin is spaced apart the 5-45 degree.Radiating effect is best under this size.
Compared with prior art, the present invention causes the origin cause of formation of next part gas branch pipe thermal distortion by solution--the problem of next part gas branch pipe localized hyperthermia, make the temperature on the next part gas branch pipe be tending towards even, thereby solved the be in operation problem of thermal distortion on the vertical direction that occurs of harp arrangement converter next part gas branch pipe from the source, reduced the material temperature of high-temperature area simultaneously, the permissible stress of material is increased, improved the security of device.
Description of drawings
Fig. 1 is the schematic perspective view of embodiment of the invention assembly structure;
Fig. 2 is the part figure of pipe connecting and next part gas branch pipe assembly structure in the embodiment of the invention;
Fig. 3 is the schematic perspective view of heat radiation external member decomposition texture in the embodiment of the invention;
Fig. 4 is the temperature profile of next part gas branch pipe and harp pipe connecting in the embodiment of the invention operational process;
Fig. 5 is the temperature distribution history on the same cross section in the embodiment of the invention and the prior art operational process under the same conditions.
Embodiment
Describe in further detail below in conjunction with the present invention of accompanying drawing embodiment.
To shown in Figure 5, this is avoided the method for harp arrangement converter next part gas branch pipe thermal distortion to be as Fig. 1: in the sheathed heat radiation external member 1 of each harp pipe connecting difference of converter.
This heat radiation external member 1 adopts the good aluminum of heat conduction to be equipped with, and the heat radiation external member can also adopt the good material preparation of other heat conduction.It comprises heat dissipating ring 11 and radiating fin 12.
Wherein heat dissipating ring 11 is formed by two semi-ring butt joints, is respectively equipped with flanged plate 13 on the ora terminalis of two semi-rings.By holding bolt two semi-rings are linked together during installation.
The external diameter of the internal diameter of heat dissipating ring and harp pipe connecting 2 is suitable, and heat dissipating ring is close on the outer wall of harp pipe connecting.The wall thickness of heat dissipating ring is 5 millimeters in the present embodiment, and the height of heat dissipating ring is 150 millimeters, and the lower end of heat dissipating ring abuts on the next part gas branch pipe 3.
Radiating fin 12 arranges along heat dissipating ring outer side wall length direction, and is radial with respect to the axis of heat dissipating ring and is spaced, adjacent radiating fin 12 degree at interval in the present embodiment.Radiating fin 12 is rectangular structure, and its thickness is 4 millimeters, and its evagination is 25 millimeters in the width of heat dissipating ring outer side wall.
Radiating fin can also adopt the diminishing structure of wall thickness from inside to outside, and the radiating effect of this structure is also fine.
By Fig. 4 and Fig. 5 as can be seen: after the heat radiation external member is installed, the maximum temperature difference of next part gas branch pipe shell wall significantly is down to about 30 ℃ from about 90 ℃, thereby the distortion that temperature distributing disproportionation is caused reduces, in addition in outlet manifold and pipe under the suppressing action of the weight of liner own, just can offset the distortion that the temperature difference about 30 ℃ causes, avoid the distortion of next part gas branch pipe, reached the whole straight purpose of next part gas branch pipe.
Claims (4)
1. method of avoiding the thermal distortion of harp arrangement converter next part gas branch pipe, it is characterized in that: on each harp pipe connecting of converter, be arranged with the heat radiation external member respectively, described heat radiation external member comprises the sheathed heat dissipating ring of each described harp pipe connecting outer wall that reclining, with the radiating fin along the multi-disc evagination that arranges on the described heat dissipating ring outer side wall length direction, these radiating fins are radial with respect to the axis of described heat dissipating ring and are spaced, and the lower end of described heat dissipating ring abuts on the next part gas branch pipe.
2. the method for avoiding the thermal distortion of harp arrangement converter next part gas branch pipe according to claim 1 is characterized in that: described heat radiation external member adopts aluminum to be equipped with.
3. the method for avoiding the thermal distortion of harp arrangement converter next part gas branch pipe according to claim 1 and 2, it is characterized in that: described heat dissipating ring comprises two semi-rings, be respectively equipped with flanged plate on the ora terminalis of two semi-rings, form the heat radiation external member thereby by bolt flanged plate corresponding on two semi-rings is linked together.
4. the method for avoiding the thermal distortion of harp arrangement converter next part gas branch pipe according to claim 3, it is characterized in that: the wall thickness of described heat dissipating ring is the 3-10 millimeter, the height of described heat dissipating ring is the 30-300 millimeter, the thickness of described radiating fin is the 2-8 millimeter, the width of described radiating fin is the 10-40 millimeter, and adjacent described radiating fin is spaced apart the 5-45 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310250636.7A CN103332651B (en) | 2013-06-20 | 2013-06-20 | Method for preventing harp-type converter lower gas collection branch tube from thermal deformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310250636.7A CN103332651B (en) | 2013-06-20 | 2013-06-20 | Method for preventing harp-type converter lower gas collection branch tube from thermal deformation |
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| Publication Number | Publication Date |
|---|---|
| CN103332651A true CN103332651A (en) | 2013-10-02 |
| CN103332651B CN103332651B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310250636.7A Active CN103332651B (en) | 2013-06-20 | 2013-06-20 | Method for preventing harp-type converter lower gas collection branch tube from thermal deformation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860265A (en) * | 2015-06-05 | 2015-08-26 | 北京石油化工工程有限公司 | Conversion tube system for harp type conversion furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2457557Y (en) * | 2000-12-28 | 2001-10-31 | 北京天利深冷设备股份有限公司 | Low temperature radiation aluminium finned tube structure |
| CN101481087A (en) * | 2009-01-21 | 2009-07-15 | 中国石油化工集团公司 | Method for eliminating harp type converting kiln lower gas collector heat distortion |
| CN201900005U (en) * | 2010-11-08 | 2011-07-20 | 庞玉学 | Heat exchange type reforming furnace |
| CN202267059U (en) * | 2011-07-21 | 2012-06-06 | 西安拓沃能动科技有限公司 | Pressure gasification burner nozzle |
-
2013
- 2013-06-20 CN CN201310250636.7A patent/CN103332651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2457557Y (en) * | 2000-12-28 | 2001-10-31 | 北京天利深冷设备股份有限公司 | Low temperature radiation aluminium finned tube structure |
| CN101481087A (en) * | 2009-01-21 | 2009-07-15 | 中国石油化工集团公司 | Method for eliminating harp type converting kiln lower gas collector heat distortion |
| CN201900005U (en) * | 2010-11-08 | 2011-07-20 | 庞玉学 | Heat exchange type reforming furnace |
| CN202267059U (en) * | 2011-07-21 | 2012-06-06 | 西安拓沃能动科技有限公司 | Pressure gasification burner nozzle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860265A (en) * | 2015-06-05 | 2015-08-26 | 北京石油化工工程有限公司 | Conversion tube system for harp type conversion furnace |
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| CN103332651B (en) | 2015-07-08 |
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