CN1348923A - New technological process of replacing lower gathering pipe in synthetic ammonia converting furnace - Google Patents
New technological process of replacing lower gathering pipe in synthetic ammonia converting furnace Download PDFInfo
- Publication number
- CN1348923A CN1348923A CN 00126644 CN00126644A CN1348923A CN 1348923 A CN1348923 A CN 1348923A CN 00126644 CN00126644 CN 00126644 CN 00126644 A CN00126644 A CN 00126644A CN 1348923 A CN1348923 A CN 1348923A
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- China
- Prior art keywords
- outlet manifold
- lower collecting
- collecting main
- synthetic ammonia
- converting furnace
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Abstract
The invention relates to a new technology for replacing lower collecting main of furnace tubes for the converter. It features that when the lower collecting main has defect occurred and requires to be locally or entirely replaced, an argon arc scarfing torch is used to cut the lower collecting main with the furnace tube at the weld, and at the same time, cut off the proximal annular weld of the lower collecting main, the prepared lower collecting main section with saddle seat is replaced, or when the lower collecting main has relatively large extent of defects, the entire lower collecting main is completely replaced. By this invention, the service life of the lower collecting main is prolonged, and this meets the requirement of high temp. durability.
Description
The present invention relates to a kind of new technological process of replacing lower gathering pipe of synthetic ammonia converting furnace.
At present, Kellogg (Keellog) the type synthetic ammonia installation in large-scale fertilizer plant, in the hydrocarbon steam conversion stove, the outlet manifold of converter is all in a row changed together with boiler tube.Because energy-conservation needs of expanding production enter the eighties, the material of boiler tube changes high-temperature alloy steel (HP50) into by high-temperature alloy steel (HK40), the relative attenuate of boiler tube wall thickness, the also corresponding increase of catalyzer loading level.But the actual service life of the high-temperature alloy steel of attenuate (HP50) boiler tube is all short than outlet manifold (by Alloy 800HT rotational casting).If pipe row's boiler tube and outlet manifold are changed simultaneously, certainly will cause the waste of outlet manifold residual life.
The new technological process of replacing lower gathering pipe that the purpose of this invention is to provide a kind of synthetic ammonia converting furnace.
The objective of the invention is to realize in the following way, referring to Fig. 1, during synthetic ammonia converting outlet manifold 3 integral replacings: sever welding in saddle seat 2 and boiler tube 1 commissure with the argon arc gouge, the polishing groove, with three groups of outlet manifolds 3 minutes, adopt the manual argon arc welding welding with old boiler tube 1 respectively then.Adopt manual argon arc welding to weld three groups of outlet manifolds 3 at last; During synthetic ammonia converting outlet manifold 3 local replacings: with defective outlet manifold 3 and 2 cuttings of saddle seat, behind the polishing groove, outlet manifold 3 and the boiler tube 1 employing full argon manual welding old with the spare part and the two ends of new saddle seat with or several ⊥ types weld.
Adopt the present invention, because the outlet manifold of synthetic ammonia converting furnace is taked on-the-spot the replacing or local updating, prolong the work-ing life of outlet manifold, can satisfy the requirement of the high temperature endurance performance after 4000 hours high-temperature alloy steel (HP50) boiler tube of new outlet manifold and operation welds.
The present invention is further illustrated below in conjunction with accompanying drawing:
Fig. 1 is a synthetic ammonia converting structural representation of the present invention.
Referring to Fig. 1, synthetic ammonia converting reformer tube 1 links to each other with outlet manifold 3 by saddle seat 2, and 4 is the base bleed pipe.
Claims (2)
1, a kind of outlet manifold of synthetic ammonia converting furnace is changed technology, it is characterized in that: when defective need part or integral replacing appear in outlet manifold 3, sever with the argon arc gouge from outlet manifold 3 and boiler tube 1 commissure, simultaneously, sever the adjacent circumferential weld of outlet manifold 3, with outlet manifold section 3 local replacings of ready band saddle seat, or instantly gas collection 3 defectives more for a long time, with whole outlet manifold 3 integral replacings.
2, change technology according to the outlet manifold of right 1 described synthetic ammonia converting furnace, it is characterized in that: only change outlet manifold 3, do not change boiler tube 1, full argon arc welding welding is adopted in welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00126644 CN1348923A (en) | 2000-10-18 | 2000-10-18 | New technological process of replacing lower gathering pipe in synthetic ammonia converting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00126644 CN1348923A (en) | 2000-10-18 | 2000-10-18 | New technological process of replacing lower gathering pipe in synthetic ammonia converting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1348923A true CN1348923A (en) | 2002-05-15 |
Family
ID=4591948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00126644 Pending CN1348923A (en) | 2000-10-18 | 2000-10-18 | New technological process of replacing lower gathering pipe in synthetic ammonia converting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1348923A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101563154B (en) * | 2006-12-21 | 2012-08-22 | 乔治洛德方法研究和开发液化空气有限公司 | Method for replacing tubes in a reforming unit |
| CN113117630A (en) * | 2019-12-31 | 2021-07-16 | 中国石油天然气股份有限公司 | Method for replacing reformer tube of chemical fertilizer synthesis reformer |
-
2000
- 2000-10-18 CN CN 00126644 patent/CN1348923A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101563154B (en) * | 2006-12-21 | 2012-08-22 | 乔治洛德方法研究和开发液化空气有限公司 | Method for replacing tubes in a reforming unit |
| CN113117630A (en) * | 2019-12-31 | 2021-07-16 | 中国石油天然气股份有限公司 | Method for replacing reformer tube of chemical fertilizer synthesis reformer |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |