CN206130951U - Collection case that surpasses 620 DEG C of steam condition ultra supercritical unit boilers - Google Patents
Collection case that surpasses 620 DEG C of steam condition ultra supercritical unit boilers Download PDFInfo
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- CN206130951U CN206130951U CN201620655985.6U CN201620655985U CN206130951U CN 206130951 U CN206130951 U CN 206130951U CN 201620655985 U CN201620655985 U CN 201620655985U CN 206130951 U CN206130951 U CN 206130951U
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- collection case
- pipe
- header
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- supercritical unit
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Abstract
The utility model discloses a collection case that surpasses 620 DEG C of steam condition ultra supercritical unit boilers, including collection case body and tube socket, tube socket one end and the welding of collection case body, the other end and over heater or re -heater pipe welding, its characterized in that, does collection case body adopt 9Cr 3W 3Co large -caliber pipe collection case body, is the tube socket by 9Cr 3W is the 3Co small -bore pipe arranged and is formed, at 9Cr 3W 3Co large -caliber pipe and 9Cr 3W it has the aluminium lamination after the thermal diffusion is handled all to coat on the inner wall of 3Co small -bore pipe. The utility model provides a be applied to and surpass 620 DEG C of steam condition ultra supercritical unit boiler superheater export collection casees or a re -heater export collection case, through at 9Cr 3W the aluminium that 3Co collection case / tube socket inner wall coating thermal diffusion was handled improves anti high -temperature steam oxidizability, has good practical value.
Description
Technical field the utility model is related to one kind and is applied to surpass more than 620 DEG C Boiler of Ultra-supercritical Unit superheaters go out
Mouth header or reheater outlet header.
Background technology
With the fast development of national economy, energy shortage and environmental degradation are increasingly serious, in particularly sweeping across in recent years
The haze of east causes highest attention both domestic and external.In air-polluting emission, coal fired power plant pollutant (predominantly dioxy
Change carbon) discharge capacity occupy the pith of emission inventory, therefore reduce in power production process the discharge capacity of nuisance and
Reduce coal consumption has become the main strategic target of heat power station development.It is proved that the steam ginseng by improving generating set
Number, improve generating efficiency are the important channels for reducing coal consumption and reducing pollutant emission degree.
Under above-mentioned background, surpass 620 DEG C of steam parameter extra-supercritical units and arise at the historic moment.Surpass 620 DEG C of steam parameters super
Criticality benchmark can improve the thermal efficiency of unit.
Cause surpasses 620 DEG C of steam parameter unit super-heater exit cases or reheater outlet header pipe joint temperature is higher, is
Raising surpasses 620 DEG C of steam parameter unit boiler super-heater exit cases or reheater outlet header property safe and reliable to operation, needs
Using the 9Cr-3W-3Co large-diameter pipe headers of higher intensity, using 9Cr-3W-3Co small-bore pipe bases.
9Cr-3W-3Co has excellent elevated temperature strength.Replace P92 large-diameter pipes with 9Cr-3W-3Co large-diameter pipe headers
Header, it is possible to reduce header wall thickness, meets the requirement of header fabrication；With 9Cr-3W-3Co small-bore pipe header bases.In order to carry
High 9Cr-3W-3Co large-diameter pipes header and 9Cr-3W-3Co small-bore pipe inwall high temperature resistance steam oxidation performances, in 9Cr-3W-
3Co large-diameter pipes header and the small-bore base inwalls of 9Cr-3W-3Co coat the aluminium of heat diffusion treatment, effectively improve the anti-steaming of base
Vapour oxidation susceptibility.
Before, the aluminium of 9Cr-3W-3Co large-diameter pipes and small-bore pipe inwall coating heat diffusion treatment is not applied to boiler
Superheater or reheater outlet header.
The content of the invention
The purpose of this utility model is to provide a kind of header suitable for surpassing 620 DEG C of steam parameter units.
In order to achieve the above object, the technical solution of the utility model there is provided one kind to surpass 620 DEG C of steam parameters super
The header of criticality benchmark boiler, including header body and base, base one end and header body are welded, the other end and superheater or
Reheater tube welding, it is characterised in that the header body adopts 9Cr-3W-3Co large-diameter pipe header bodies, the base
Formed by the arrangement of 9Cr-3W-3Co small-bore pipes, on the inwall of 9Cr-3W-3Co large-diameter pipes and 9Cr-3W-3Co small-bore pipes
It is coated with the aluminium lamination after heat diffusion treatment.
Preferably, the superheater or reheater pipe are formed by the arrangement of high temperature resistant Austenitic stainless steel pipe.
The utility model provides and a kind of new is applied to surpass 620 DEG C of steam parameter Boiler of Ultra-supercritical Unit superheaters
Outlet header or reheater outlet header, by the aluminium that heat diffusion treatment is coated in 9Cr-3W-3Co headers/base inwall, improve
High temperature resistance steam oxidation performance, with excellent practical value.
Description of the drawings
A kind of structure of header for surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Unit that Fig. 1 is provided for the utility model
Schematic diagram.
Specific embodiment
To become apparent the utility model, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
As shown in figure 1, the utility model provides a kind of header for surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Unit.
The header that the utility model is provided can be used as super-heater exit case, also can be used as reheater outlet header, including 9Cr-3W-
3Co large-diameter pipe headers body 1 and the base 2 arranged by 9Cr-3W-3Co small-bore pipes.The one end of base 2 and 9Cr-3W-
3Co large-diameter pipe headers body 1 is welded, and the other end is welded with superheater or reheater pipe 3.Superheater or reheater pipe 3
Formed by the arrangement of high temperature resistant Austenitic stainless steel pipe.Heat diffusion treatment is coated with header inner body wall and base inwall
Aluminium lamination 4,5.
9Cr-3W-3Co chemical compositions are as shown in table 1：
9Cr-3W-3Co alloy composition tables (wt, %) of table 1
| Cr | W | Co |
| 8.5-9.5 | 2.5-3.5 | 2.5-3.5 |
The maximum permissible stress of 9Cr-3W-3Co is as shown in table 2：
Maximum permissible stress table (the unit of table 2：MPa)
| Temperature | 650℃ |
| 9Cr-3W-3Co | ＞ 40 |
Coated with aluminum heat diffusion treatment technique can adopt following steps in header inner body wall and base inwall：
1st, 9Cr-3W-3Co large-diameter pipes and small-bore pipe inwall are machined out；
2nd, aluminium paste is coated in 9Cr-3W-3Co large-diameter pipes and small-bore pipe inwall；
3rd, normalized treatment+tempering heat treatment is carried out to 9Cr-3W-3Co large-diameter pipes and small-bore pipe.
Above-mentioned technique completes 9Cr-3W-3Co large-diameter pipes and small-bore pipe inwall coats the aluminium of heat diffusion treatment, Ke Yiti
High 9Cr-3W-3Co large-diameter pipes and small-bore pipe inwall high temperature resistance steam oxidation performance, fully meet 9Cr-3W-3Co heavy calibers
The requirement of pipe and small-bore pipe inwall high temperature resistance steam oxidation.
Claims (2)
1. a kind of header for surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Unit, including header body and base, base one end with
The welding of header body, the other end and superheater or reheater tube welding, it is characterised in that the header body adopts 9Cr-
3W-3Co large-diameter pipe header bodies, the base is formed by the arrangement of 9Cr-3W-3Co small-bore pipes, in the big mouths of 9Cr-3W-3Co
The aluminium lamination after heat diffusion treatment is coated with the inwall of footpath pipe and 9Cr-3W-3Co small-bore pipes.
2. a kind of header for surpassing 620 DEG C of steam parameter Boiler of Ultra-supercritical Unit as claimed in claim 1, it is characterised in that
The superheater or reheater pipe are formed by the arrangement of high temperature resistant Austenitic stainless steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620655985.6U CN206130951U (en) | 2016-06-28 | 2016-06-28 | Collection case that surpasses 620 DEG C of steam condition ultra supercritical unit boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620655985.6U CN206130951U (en) | 2016-06-28 | 2016-06-28 | Collection case that surpasses 620 DEG C of steam condition ultra supercritical unit boilers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206130951U true CN206130951U (en) | 2017-04-26 |
Family
ID=58560948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620655985.6U Active CN206130951U (en) | 2016-06-28 | 2016-06-28 | Collection case that surpasses 620 DEG C of steam condition ultra supercritical unit boilers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206130951U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167804A (en) * | 2017-12-27 | 2018-06-15 | 哈尔滨锅炉厂有限责任公司 | A kind of transition header of Boiler of Ultra-supercritical Unit |
| CN108180463A (en) * | 2017-12-27 | 2018-06-19 | 哈尔滨锅炉厂有限责任公司 | A kind of header of 630 DEG C of advanced ultra-supercritical boilers |
| CN110397908A (en) * | 2019-08-20 | 2019-11-01 | 华能国际电力股份有限公司 | A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit |
-
2016
- 2016-06-28 CN CN201620655985.6U patent/CN206130951U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167804A (en) * | 2017-12-27 | 2018-06-15 | 哈尔滨锅炉厂有限责任公司 | A kind of transition header of Boiler of Ultra-supercritical Unit |
| CN108180463A (en) * | 2017-12-27 | 2018-06-19 | 哈尔滨锅炉厂有限责任公司 | A kind of header of 630 DEG C of advanced ultra-supercritical boilers |
| CN108167804B (en) * | 2017-12-27 | 2019-06-18 | 哈尔滨锅炉厂有限责任公司 | A kind of transition header of Boiler of Ultra-supercritical Unit |
| CN110397908A (en) * | 2019-08-20 | 2019-11-01 | 华能国际电力股份有限公司 | A kind of boiler header tube socket for 600-620 degrees Celsius of vapor (steam) temperature fired power generating unit |
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