CN205137519U - 700 DEG C ultra supercritical boiler water cold wall pipe row - Google Patents
700 DEG C ultra supercritical boiler water cold wall pipe row Download PDFInfo
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- CN205137519U CN205137519U CN201520797064.9U CN201520797064U CN205137519U CN 205137519 U CN205137519 U CN 205137519U CN 201520797064 U CN201520797064 U CN 201520797064U CN 205137519 U CN205137519 U CN 205137519U
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Abstract
The utility model discloses a 700 DEG C ultra supercritical boiler water cold wall pipe row, water cold wall pipe arranges and is used for 700 DEG C of ultra supercritical boiler, concatenation mode that water cold wall pipe arranged be pipe (2) and fin (1) connection, is connected with the welding mode between pipe and the fin, the used material of this water cold wall pipe is the 9Cr -3W -3Co -Nd -B martensite steel, and the fin material is SA387Gr91.
Description
Technical field
The utility model relates to a kind of 700 DEG C of ultra-supercritical boiler water-cooling wall pipes row.
Background technology
Because 700 DEG C of ultra-supercritical boiler water-cooling wall design pressures are very high, vertical section water-cooling wall metal mean temperature reaches 560-600 DEG C.For 700 DEG C of ultra-supercritical boiler vertical water wall pipes of Φ 44.5 external diameter, when metal mean temperature equals 575 DEG C, need to select average wall thickness to be the T92 high strength martensitic small-bore pipe of 9mm.Because water-cooling wall pipe wall thickness can not more than 9mm, so when metal mean temperature is more than 575 DEG C, need to select allowable stress higher than T92, average wall thickness is the 617B nickel-base alloy small-bore pipe of 6mm.
2015, steel mill developed 9Cr-3W-3Co-Nd-B martensite steel.When 580 DEG C, 9Cr-3W-3Co-Nd-B martensite steel allowable stress is higher than T92 by 14%; When 600 DEG C, 9Cr-3W-3Co-Nd-B allowable stress is higher than T92 by 30%; When 610 DEG C, 9Cr-3W-3Co-Nd-B allowable stress is higher than T92 by 32%.
For the vertical water wall pipe of Φ 44.5 external diameter, when metal mean temperature equals 580 DEG C, the 9Cr-3W-3Co-Nd-B martensite small-bore pipe of average wall thickness 7mm can be selected to manufacture 700 DEG C of ultra-supercritical boiler vertical water walls; When metal mean temperature equals 600 DEG C, the 9Cr-3W-3Co-Nd-B martensite small-bore pipe of average wall thickness 8mm can be selected to manufacture 700 DEG C of ultra-supercritical boiler vertical water walls; When metal mean temperature equals 610 DEG C, the 9Cr-3W-3Co-Nd-B martensite small-bore pipe of average wall thickness 8.5mm can be selected to manufacture 700 DEG C of ultra-supercritical boiler vertical water walls.
Due to 20 times that 617B nickel-base alloy small-bore pipe price is 9Cr-3W-3Co-Nd-B martensite steel small-bore pipe price, 9Cr-3W-3Co-Nd-B martensite small-bore pipe is used to manufacture 700 DEG C of ultra-supercritical boiler vertical water walls for 617B nickel-base alloy small-bore pipe, can greatly reduce boiler cost, so propose to use 9Cr-3W-3Co-Nd-B martensite small-bore pipe to manufacture water screen tube interest for 617B nickel-base alloy small-bore pipe to belong to the vertical section water-cooling wall pipe that mean temperature is 575-610 DEG C of temperature range.
Utility model content
High for 617B nickel-base alloy small-bore pipe price, the utility model adopts 9Cr-3W-3Co-Nd-B martensite small-bore pipe to manufacture 700 DEG C of ultra-supercritical boiler vertical water walls for 617B nickel-base alloy small-bore pipe, can greatly reduce boiler cost.In order to realize above-mentioned technical purpose, the technical solution of the utility model is to provide a kind of 700 DEG C of ultra-supercritical boiler water-cooling wall pipes row.
The technical solution of the utility model is: a kind of 700 DEG C of ultra-supercritical boiler water-cooling wall pipes row, described water screen tube row is used for 700 DEG C of ultra-supercritical boilers, the connecting method of described water screen tube row is that pipe (2) is connected with fin (1), is connected between pipe with fin with welding manner; This water-cooling wall pipe material therefor is 9Cr-3W-3Co-Nd-B martensite steel, and fin material is SA387Gr91.
The utility model also has following beneficial effect:
Because 700 DEG C of ultra-supercritical boiler water-cooling wall design pressures are very high, water-cooling wall metal temperature reaches 600 DEG C, so need the 9Cr-3W-3Co-Nd-B martensite steel pipe manufacturer water-cooling wall assembly selected than SA213T92.Compared with manufacturing water-cooling wall with 617B nickel-base alloy pipe, use 9Cr-3W-3Co-Nd-B martensite steel to manufacture water-cooling wall, reduce by 700 DEG C of ultra supercritical number boiler vertical section water-cooling wall costs of raw material 80%.
Accompanying drawing explanation
Fig. 1 is panelized-tube-wall section splicing construction figure.
Description of reference numerals: 1.SA387Gr91 band steel, 2.9Cr-3W-3Co-Nd-B martensite small-bore pipe
3. factory's weld seam.
Detailed description of the invention
For making the utility model become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Embodiment
The purpose of this utility model is to provide a kind of design of 700 DEG C of ultra-supercritical boiler water-cooling walls.The program adopts 9Cr-3W-3Co-Nd-B martensite steel pipe manufacturer water-cooling wall, can meet the requirement of strength of 700 DEG C of ultra-supercritical boiler water-cooling wall superelevation design pressure and 600 DEG C of metal temperatures.Compared with manufacturing water-cooling wall with 617B nickel-base alloy pipe, use 9Cr-3W-3Co-Nd-B martensite steel to manufacture water-cooling wall, reduce by 700 DEG C of ultra supercritical number boiler vertical section water-cooling wall costs of raw material 80%.
The technical solution of the utility model provides a kind of 700 DEG C of ultra-supercritical boiler water-cooling wall designs, it is characterized in that:
1. the connecting method of this water screen tube row is that pipe is connected with fin, is connected between pipe with fin with welding manner.Structure as shown in Figure 1.
2. this water-cooling wall pipe material therefor is 9Cr-3W-3Co-Nd-B martensite steel, and fin material is SA387Gr91.
Be in 600MW, 35MPa, 700 DEG C of extra-supercritical unit tower boilers in parameter, adopt Φ 44.5 × 89Cr-3W-3Co-Nd-B martensite small-bore pipe to manufacture vertical section water-cooling wall.
Claims (1)
1. one kind 700 DEG C ultra-supercritical boiler water-cooling wall pipe rows, it is characterized in that: described water screen tube row is used for 700 DEG C of ultra-supercritical boilers, the connecting method of described water screen tube row is that pipe (2) is connected with fin (1), is connected between pipe with fin with welding manner; This water-cooling wall pipe material therefor is 9Cr-3W-3Co-Nd-B martensite steel, and fin material is SA387Gr91.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520797064.9U CN205137519U (en) | 2015-10-15 | 2015-10-15 | 700 DEG C ultra supercritical boiler water cold wall pipe row |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520797064.9U CN205137519U (en) | 2015-10-15 | 2015-10-15 | 700 DEG C ultra supercritical boiler water cold wall pipe row |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205137519U true CN205137519U (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520797064.9U Active CN205137519U (en) | 2015-10-15 | 2015-10-15 | 700 DEG C ultra supercritical boiler water cold wall pipe row |
Country Status (1)
| Country | Link |
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| CN (1) | CN205137519U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202569A (en) * | 2015-10-15 | 2015-12-30 | 上海锅炉厂有限公司 | Water cooling wall pipe bundle of 700-DEG C ultra-supercritical boiler |
-
2015
- 2015-10-15 CN CN201520797064.9U patent/CN205137519U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202569A (en) * | 2015-10-15 | 2015-12-30 | 上海锅炉厂有限公司 | Water cooling wall pipe bundle of 700-DEG C ultra-supercritical boiler |
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