CN206626560U - Reheater height for boiler generating set outlet header device again - Google Patents
Reheater height for boiler generating set outlet header device again Download PDFInfo
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- CN206626560U CN206626560U CN201720119822.0U CN201720119822U CN206626560U CN 206626560 U CN206626560 U CN 206626560U CN 201720119822 U CN201720119822 U CN 201720119822U CN 206626560 U CN206626560 U CN 206626560U
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- base
- reheater
- header
- outlet header
- outlet
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Abstract
A kind of high outlet header device again in reheater outlet for boiler generating set is the utility model is related to, belongs to pipe high temperature pressure pipeline tankage, the technical solution adopted in the utility model is：Reheater height for 620 DEG C of boiler generating set of reheat steam temperature outlet header device again, high outlet header again including reheater and tubulose, the high outlet section heat exchanger tube for accessing reheater on outlet header again, wherein high outlet header again is provided with base, the high outlet header wall again is provided with the base hole run through, base is welded on base hole, the outlet section heat exchanger tube of reheater is connected to high again on the base of outlet header after boiler stretching, tube end is welded on base, the heat exchanger tube material is SUPER304H, base material is SA 213T92, high outlet header material again is SA 335P92.
Description
Technical field
It the utility model is related to a kind of reheater for 620 DEG C of ultra-supercritical boiler generating set reheat steam temperature and export height
Outlet header device again, belong to pipe high temperature pressure pipeline tankage.
Background technology
Current domestic extra-supercritical unit turbine inlet reheat steam temperature has 600 DEG C, 610 DEG C and 620 DEG C schemes can
Choosing.600 DEG C have an operation achievement, and technology maturation is reliable.There is order achievement 610 DEG C and 620 DEG C of country, there is no operation achievement.State
There is the achievement that puts into operation for the extra-supercritical unit that reheat steam temperature is 610 DEG C and 620 DEG C on border.Reheat temperature is improved to pass through unit
Ji property is favourable, while can also reduce low pressure exhaust steam moisture.Improve reheat temperature mainly to be limited by material, if reheat steam temperature
613 DEG C are brought up to, reheater outlet steam temperature needs to bring up to 623 DEG C, and high outlet header, pipeline, the wall temperature of heating surface have again
Corresponding lifting, therefore the security of material merits attention.
For the outlet temperature of 620 DEG C of unit reheater headers compared to improving 20 DEG C or so originally, tube wall temperature improves 10
DEG C~30 DEG C.So, the metal material that high temperature reheater is applied will increase to close to the material of 640 DEG C of grades.
Substantially there was only four kinds available for the header of ultra supercritical parameter and the large-diameter steel pipe of pipeline in existing ripe boiler material
Ferritic stainless steel, such as P91, P92（NF616）、P911（E911）And P122（HCM12A）, matched pipe joint then distinguishes
From T91, T92, T911 and T122.Selection is such to be matched, and is to ensure the demand of pipe joint welding, meet welding point
There is equal thermal coefficient of expansion with header, it designs wall temperature will be at 650 DEG C or so, and the temperature extremes is in T92 materials most
Near low allowable stress.Reheater heat exchanger tube uses SUPER304H materials, in order to which pipe joint is connected.
The pipe joint that the outlet outer section of stove is connected with header P92, the reason for because of welding procedure, it is impossible to heat-resistance stainless steel,
Energy ferritic steel, and material ripe at present there is no the replacement material of other ripe greater degrees in addition to SA-213T92
Material.If routinely ultra supercritical scheme does not adjust high parameter boiler scheme, it designs wall temperature will be at 650 DEG C or so,
Near minimum allowable stress in T92 materials.Therefore, T92 materials are links the weakest in whole system, pass through reduction
Temperature Deviation, the use of T92 materials is also reduced as far as possible.
It is connected directly between and is stretched out on the heat exchanger tube of boiler wall in the outlet pipe connection of existing high outlet section again, this causes
Longer pipe joint bears the temperature and pressure near its minimum allowable stress, security risk be present.
The content of the invention
The utility model provides a kind of reheater height for boiler generating set outlet header device again, solves crude oil again
The pipe joint of hot device header is in potential safety hazard existing for 620 DEG C of reheat steam temperature conditions.
To achieve the above object, the technical solution adopted in the utility model is：
Reheater height for boiler generating set outlet header device again, including the height of reheater and tubulose export collection again
Case, the high outlet section heat exchanger tube for accessing reheater on outlet header again, wherein high outlet header again is provided with base, it is described
High outlet header wall again is provided with the base hole run through, and base is welded on base hole, and the outlet section heat exchanger tube of reheater is from pot
Stove is connected to height again on the base of outlet header after stretching out, tube end is welded on base, and the heat exchanger tube material is
SUPER304H, base material are SA-213T92, and high outlet header material again is SA-335P92.
It is weldingly connected preferably, the outlet section heat exchanger tube of the reheater uses with base, the center line and collection of tube wall
The center line of case intersects.
Further preferably the base is distributed on the Zhou Jing of header same plane in 20 degree of angles, under header
Portion sets header outlet.
Preferably, the base is in a length of 88mm in the outside of header.
Preferably, the tube dimension of the header is external diameter 813mm, pipe thickness 65mm；The outlet section of reheater
Heat exchanger tube external diameter is 51mm, pipe thickness 4mm；Base external diameter is 57mm, and the pipe thickness of base is 6mm.
The utility model has the advantage of：Reduce the use of the T92 materials as base, high outlet pipe connection T92 materials again
Material is only used for the transition pipe joint of 88mm length in header, avoid longer base bear it is existing near minimum allowable stress
Weak link causes security risk, improves the safety coefficient in use.
Brief description of the drawings
Fig. 1 is the annexation figure between heat exchanger tube of the present utility model and header,
Fig. 2 is the local annexation figure of heat exchanger tube of the present utility model and base and header,
Fig. 3 is the annexation figure of the heat exchanger tube and header in original use,
Fig. 4 is heat exchanger tube in original use and base and the local annexation figure of header,
Fig. 5 is the annexation figure between reheater and header,
Reference：1st, reheater, 2, high outlet header again, 3, outlet section heat exchanger tube, 4, base, 5, base hole, 6, pot
Furnace wall.
Embodiment
The utility model is used for the reheater height outlet header device again of 620 DEG C of boiler generating sets of reheat steam temperature, including
The high outlet header again of reheater and tubulose, the high outlet section heat exchanger tube for accessing reheater on outlet header again, wherein high
Outlet header is provided with base again, and the high outlet header wall again is provided with the base hole run through, and base is welded on base hole,
The outlet section heat exchanger tube of reheater is connected to height again on the base of outlet header after boiler stretching, and tube end is welded on pipe
On seat, structure is as shown in Figure 1.The heat exchanger tube material is SUPER304H, and base material is SA-213T92, high outlet header again
Material is SA-335P92.
The composition of above-mentioned material and corresponding national standard
The outlet section heat exchanger tube quantity of reheater is more, its with base using being weldingly connected, the center line of tube wall and header
Center line intersects.The base is distributed on the Zhou Jing of header same plane in 20 degree of angles, as shown in Figure 2.Under header
Portion sets header outlet.The base is in a length of 88mm in the outside of header.
The tube dimension of the header is external diameter 813mm, pipe thickness 65mm；The outlet section heat exchanger tube external diameter of reheater
For 51mm, pipe thickness 4mm；Base external diameter is 57mm, and the pipe thickness of base is 6mm.
High outlet connecting pipe original design temperature again is 608 DEG C, and outlet steam temperature is lifted to 623 DEG C, then its design temperature
It is up to 630 DEG C.Material SA-335P92 still can be selected in the header of this temperature, pipeline.
High outlet header again takes the measure for reducing temperature deviation in design, and the design temperature control of this header is existed
In 630 DEG C, SA-335P92 still can be selected in high outlet header again, and meets《Boiler safety technology Supervision Code》To materials'use
The requirement of temperature.
Long base made of T92 will be connected directly between what boiler surfaces position was stretched out by the utility model in Fig. 3 and 4 figures
Reheater heat exchanger tube is changed to extend to heat exchanger tube at header, and the base of the T92 materials of long range is replaced with into short-range pipe
Seat.
Being improved at this reduces the use of T92 materials as base, avoid longer base bear it is minimum it is allowable should
Nearby existing weak link causes security risk to power, improves the safety coefficient in use.
Claims (5)
1. a kind of reheater height for boiler generating set outlet header device again, including the height of reheater and tubulose export again
Header, it is characterized in that, the high outlet section heat exchanger tube for accessing reheater on outlet header again, wherein high set on outlet header again
There is base, the high outlet header wall again is provided with the base hole run through, and base is welded on base hole, the outlet section of reheater
Heat exchanger tube is connected to height again on the base of outlet header after boiler stretching, and tube end is welded on base, the heat exchange
Tubing matter is SUPER304H, and base material is SA-213T92, and high outlet header material again is SA-335P92.
2. the reheater height according to claim 1 for boiler generating set outlet header device again, it is characterized in that, institute
The outlet section heat exchanger tube and base use for stating reheater are weldingly connected, and the center line of tube wall intersects with the center line of header.
3. the reheater height according to claim 2 for boiler generating set outlet header device again, it is characterized in that, institute
State base to be distributed in 20 degree of angles on the Zhou Jing of header same plane, the bottom of header sets header outlet.
4. the reheater height according to claim 2 for boiler generating set outlet header device again, it is characterized in that, institute
Base is stated in a length of 88mm in the outside of header.
5. the reheater height according to claim 4 for boiler generating set outlet header device again, it is characterized in that, institute
The tube dimension for stating header is external diameter 813mm, pipe thickness 65mm；The outlet section heat exchanger tube external diameter of reheater is 51mm, pipe
Wall thickness is 4mm；Base external diameter is 57mm, and the pipe thickness of base is 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720119822.0U CN206626560U (en) | 2017-02-09 | 2017-02-09 | Reheater height for boiler generating set outlet header device again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720119822.0U CN206626560U (en) | 2017-02-09 | 2017-02-09 | Reheater height for boiler generating set outlet header device again |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206626560U true CN206626560U (en) | 2017-11-10 |
Family
ID=60213821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720119822.0U Expired - Fee Related CN206626560U (en) | 2017-02-09 | 2017-02-09 | Reheater height for boiler generating set outlet header device again |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206626560U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975785A (en) * | 2017-12-28 | 2018-05-01 | 哈尔滨锅炉厂有限责任公司 | The header of 630 DEG C of steam parameter station boilers |
| 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 |
-
2017
- 2017-02-09 CN CN201720119822.0U patent/CN206626560U/en not_active Expired - Fee Related
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 |
| 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 |
| CN107975785A (en) * | 2017-12-28 | 2018-05-01 | 哈尔滨锅炉厂有限责任公司 | The header of 630 DEG C of steam parameter station boilers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171110 Termination date: 20180209 |