CN111256101A - Unequal-pitch arrangement method for high-temperature heating surfaces of million-pi-shaped double-tangent-circle boiler - Google Patents
Unequal-pitch arrangement method for high-temperature heating surfaces of million-pi-shaped double-tangent-circle boiler Download PDFInfo
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- CN111256101A CN111256101A CN201911424717.8A CN201911424717A CN111256101A CN 111256101 A CN111256101 A CN 111256101A CN 201911424717 A CN201911424717 A CN 201911424717A CN 111256101 A CN111256101 A CN 111256101A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000011295 pitch Substances 0.000 claims abstract description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003546 flue gas Substances 0.000 claims abstract description 37
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/12—Forms of water tubes, e.g. of varying cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
- F22B37/201—Suspension and securing arrangements for walls built-up from tubes
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A method for arranging high-temperature heating surfaces of million-pi-shaped double-tangent-circle boilers at unequal pitches relates to an unequal pitch arrangement method, in particular to a method for arranging the high-temperature heating surfaces of the million-pi-shaped double-tangent-circle boilers at unequal pitches. The invention aims to solve the problem that a high-temperature heating surface of a conventional million pi-shaped double-tangent circular boiler cannot well adapt to the side heat load deviation of flue gas, so that a high-efficiency ultra-supercritical boiler is difficult to reach rated steam temperature. The method comprises the following steps: according to actual operation data of the flue gas side heat load of the million pi-shaped double-tangential boiler on the high-temperature heating surface; selecting high-temperature heating surface tube panel flue gas side heat loads close to the left water-cooled wall and the right water-cooled wall, and selecting high-temperature heating surface tube panel flue gas side heat loads close to the central line of the boiler; matching the arrangement area of the tube panels in the corresponding area according to the heat load proportion selected in the second step; and adjusting the tube panel arrangement pitch in the corresponding region according to the tube panel areas in different regions arranged in the step three. The invention belongs to the field of boiler equipment.
Description
Technical Field
The invention relates to an unequal-pitch arrangement method, in particular to an unequal-pitch arrangement method for a high-temperature heating surface of a million pi-shaped double-tangent-circle boiler, and belongs to the field of boiler equipment.
Background
The high-temperature heating surfaces of the conventional million pi-shaped double-tangent circular boiler are arranged at equal pitches. However, the heat load of the flue gas in the width direction of the boiler is not uniform during the actual operation of the boiler, and the tube panels in the equal-pitch arrangement mode cannot well adapt to the heat load deviation of the flue gas side, so that the high-efficiency ultra-supercritical boiler is more and more difficult to reach the rated steam temperature.
Disclosure of Invention
The invention provides a method for arranging high-temperature heating surfaces of million pi-shaped double-tangent circular boilers at unequal pitches, and aims to solve the problem that high-efficiency ultra-supercritical boilers are difficult to reach rated steam temperature due to the fact that high-temperature heating surfaces of the conventional million pi-shaped double-tangent circular boilers cannot well adapt to the side heat load deviation of flue gas.
The technical scheme adopted by the invention for solving the problems is as follows: the method comprises the following specific steps:
according to actual operating data of flue gas side thermal load of a million pi-shaped double-tangential boiler high-temperature heating surface, the flue gas thermal load close to a left water-cooled wall and a right water-cooled wall is low, and the flue gas thermal load close to a boiler center line is high;
selecting high-temperature heating surface tube panel flue gas side heat loads close to the left water-cooled wall and the right water-cooled wall, and selecting high-temperature heating surface tube panel flue gas side heat loads close to the center line of the boiler;
step three, matching the arrangement area of the tube panels in the corresponding area according to the heat load proportion selected in the step two, wherein the heat load proportion and the arrangement area are in one-to-one correspondence;
and step four, adjusting the tube panel arrangement pitch in the corresponding region according to the tube panel areas in different regions arranged in the step three.
Further, the heat load of the flue gas close to the left water-cooled wall and the right water-cooled wall in the step one is 80-90%.
Further, the heat load of the flue gas close to the central line of the boiler in the step one is 110-120%.
And further, the side heat load of the flue gas of the tube panel of the high-temperature heating surface close to the left water-cooled wall and the right water-cooled wall in the second step is selected to be 85% of the average heat load.
Further, the high-temperature heating surface tube panel flue gas side heat load close to the central line of the boiler in the second step is selected to be 115% of the average heat load.
Further, the area of the tube panel arranged on the high-temperature heating surface in the third step is 85% of the average arrangement area.
Further, the area of the tube panel arranged on the high-temperature heating surface in the third step is 115% of the average arrangement area.
Furthermore, in the fourth step, the tube panel layout area of the high-temperature heating surface is reduced, and the corresponding tube panel pitch is increased to 118% of the pitch.
Furthermore, the tube panel arrangement area of the high-temperature heating surface in the fourth step is increased, and the corresponding tube panel pitch is reduced to 87% of the average pitch.
The invention has the beneficial effects that: the invention is suitable for 1000MW grade ultra-supercritical Pi type double-tangent-circle boiler, overcomes the defects of the prior art, and solves the problem that the million Pi type double-tangent-circle boiler is difficult to reach the rated steam temperature; the invention improves the capacity of the high-efficiency ultra-supercritical boiler to reach the rated steam temperature, adopts unequal-pitch arrangement on the high-temperature heating surface of the newly designed boiler according to the operating data of the flue gas side heat load of the high-temperature heating surface of the operating million pi type double-tangential boiler, and reduces the influence of the deviation of the flue gas side heat load on the tube panel. Compared with the conventional million pi-shaped double-tangent-circle boiler with the high-temperature heating surface arranged at equal pitch, the heating surface tube panels arranged at unequal pitch can better adapt to the side heat load deviation of the flue gas, and the heat exchange area of the heating surface tube panels is better utilized, so that the deviation is reduced, and the boiler reaches the rated steam temperature.
Drawings
FIG. 1 is a schematic diagram of the arrangement of the high-temperature heating surfaces of a million pi-shaped double-tangential circular boiler with unequal pitches.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the method for arranging the high-temperature heating surfaces of the million pi-shaped double-tangential circular boiler with unequal pitches in the embodiment specifically comprises the following steps:
according to actual operating data of flue gas side thermal load of a million pi-shaped double-tangential boiler high-temperature heating surface, the flue gas thermal load close to a left water-cooled wall and a right water-cooled wall is low, and the flue gas thermal load close to a boiler center line is high;
selecting the side heat load of the flue gas of the tube panel 3 of the high-temperature heating surface close to the left water-cooled wall and the right water-cooled wall, and selecting the side heat load of the flue gas of the tube panel 4 of the high-temperature heating surface close to the central line of the boiler;
step three, matching the arrangement area of the tube panels in the corresponding area according to the heat load proportion selected in the step two, wherein the heat load proportion and the arrangement area are in one-to-one correspondence;
and step four, adjusting the tube panel arrangement pitch in the corresponding region according to the tube panel areas in different regions arranged in the step three.
The second embodiment is as follows: referring to fig. 1, the embodiment is described, and in the first step of the method for arranging the high-temperature heating surfaces of the million pi-shaped double-tangential circular boiler at unequal pitches in the embodiment, the heat load of the flue gas close to the left water-cooled wall and the right water-cooled wall is 80% to 90%.
The third concrete implementation mode: the embodiment is described with reference to fig. 1, and the unequal pitch arrangement method for the high-temperature heating surface of the million pi-shaped double-tangential circular boiler in the embodiment is characterized in that: in the first step, the heat load of the flue gas close to the central line of the boiler is 110-120%.
The fourth concrete implementation mode: referring to fig. 1, the embodiment is described, and in step two of the method for arranging the high-temperature heating surfaces of the million pi-shaped double-tangential boiler at unequal pitches in the embodiment, the side heat load of the flue gas of the high-temperature heating surface tube panel 3 close to the left water-cooled wall and the right water-cooled wall is selected to be 85% of the average heat load.
The fifth concrete implementation mode: referring to fig. 1, the embodiment is described, and in step two of the method for arranging the high-temperature heating surfaces of the million pi-shaped double-tangential boiler at unequal pitches in the embodiment, the side heat load of the flue gas of the tube panel 4 of the high-temperature heating surface close to the center line of the boiler is selected to be 115% of the average heat load.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1, and the area of the tube panels arranged on the high-temperature heating surface tube panels 3 in the third step of the unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential circular boiler in the embodiment is 85% of the average arrangement area.
The seventh embodiment: the embodiment is described with reference to fig. 1, and the area of the tube panel 4 of the high-temperature heating surface in the third step of the unequal-pitch arrangement method for the high-temperature heating surface of the million pi-shaped double-tangential circular boiler in the embodiment is 115% of the average arrangement area.
The specific implementation mode is eight: the embodiment is described with reference to fig. 1, and the method for arranging the high-temperature heating surface unequal pitches of the million pi-shaped double-tangential circular boiler has the advantages that the arrangement area of the tube panels 3 on the high-temperature heating surface in the fourth step is reduced, and the corresponding tube panel pitch is increased to 118% of the pitch.
The specific implementation method nine: the embodiment is described with reference to fig. 1, and the tube panel 4 of the high-temperature heating surface in the fourth step of the unequal-pitch arrangement method for the high-temperature heating surface of the million pi-shaped double-tangential circular boiler in the embodiment is increased in arrangement area, and the pitch of the corresponding tube panel is reduced to 87% of the average pitch.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A method for arranging high-temperature heating surfaces of million pi-shaped double-tangent circular boilers at unequal pitches is characterized by comprising the following steps: the unequal-pitch arrangement method for the high-temperature heating surface of the million pi-shaped double-tangent circular boiler comprises the following specific steps:
according to actual operating data of flue gas side thermal load of a million pi-shaped double-tangential boiler high-temperature heating surface, the flue gas thermal load close to a left water-cooled wall and a right water-cooled wall is low, and the flue gas thermal load close to a boiler center line is high;
selecting flue gas side heat loads of high-temperature heating surface tube panels (3) close to the left water-cooled wall and the right water-cooled wall, and selecting flue gas side heat loads of high-temperature heating surface tube panels (4) close to the central line of the boiler;
step three, matching the arrangement area of the tube panels in the corresponding area according to the heat load proportion selected in the step two, wherein the heat load proportion and the arrangement area are in one-to-one correspondence;
and step four, adjusting the tube panel arrangement pitch in the corresponding region according to the tube panel areas in different regions arranged in the step three.
2. The unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential boiler according to claim 1, is characterized in that: the heat load of the flue gas close to the left water-cooled wall and the right water-cooled wall in the first step is 80-90%.
3. The unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential boiler according to claim 1, is characterized in that: in the first step, the heat load of the flue gas close to the central line of the boiler is 110-120%.
4. The unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential boiler according to claim 1, is characterized in that: and in the second step, the flue gas side heat load of the high-temperature heating surface tube panel (3) close to the left water-cooled wall and the right water-cooled wall is selected to be 85% of the average heat load.
5. The unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential boiler according to claim 1, is characterized in that: and in the second step, the side heat load of the flue gas of the tube panel (4) of the high-temperature heating surface close to the central line of the boiler is selected to be 115 percent of the average heat load.
6. The unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential boiler according to claim 1, is characterized in that: in the third step, the area of the tube panel arranged on the high-temperature heating surface (3) is 85 percent of the average arrangement area.
7. The unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential boiler according to claim 1, is characterized in that: in the third step, the area of the tube panel (4) of the high-temperature heating surface is 115 percent of the average arrangement area.
8. The unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential boiler according to claim 1, is characterized in that: in the fourth step, the arrangement area of the tube panel (3) of the high-temperature heating surface is reduced, and the pitch of the corresponding tube panel is increased to 118 percent of the pitch.
9. The unequal-pitch arrangement method for the high-temperature heating surfaces of the million pi-shaped double-tangential boiler according to claim 1, is characterized in that: in the fourth step, the arrangement area of the tube panel (4) of the high-temperature heating surface is increased, and the pitch of the corresponding tube panel is reduced to 87 percent of the average pitch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911424717.8A CN111256101A (en) | 2019-12-31 | 2019-12-31 | Unequal-pitch arrangement method for high-temperature heating surfaces of million-pi-shaped double-tangent-circle boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911424717.8A CN111256101A (en) | 2019-12-31 | 2019-12-31 | Unequal-pitch arrangement method for high-temperature heating surfaces of million-pi-shaped double-tangent-circle boiler |
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| CN111256101A true CN111256101A (en) | 2020-06-09 |
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| CN201911424717.8A Pending CN111256101A (en) | 2019-12-31 | 2019-12-31 | Unequal-pitch arrangement method for high-temperature heating surfaces of million-pi-shaped double-tangent-circle boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815294A (en) * | 2021-02-02 | 2021-05-18 | 哈尔滨锅炉厂有限责任公司 | Novel boiler membrane type wall tube panel space behavior size positioning tool and method |
| CN115031257A (en) * | 2022-06-16 | 2022-09-09 | 西安热工研究院有限公司 | Water-cooled wall system for reducing steam temperature deviation of water-cooled wall outlet of ultra-supercritical boiler |
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|---|---|---|---|---|
| CN1248683A (en) * | 1999-07-29 | 2000-03-29 | 上海交通大学 | Pitch changeable type superheater and reheater |
| CN102444886A (en) * | 2011-12-19 | 2012-05-09 | 清华大学 | Low-mass flow rate perpendicular water cooled wall arrangement method |
| CN102537994A (en) * | 2011-12-21 | 2012-07-04 | 西安交通大学 | Device for eliminating flue gas temperature deviation |
| CN105550522A (en) * | 2015-12-25 | 2016-05-04 | 东南大学 | Method for calculating thermal load uneven coefficient of high-temperature heating surface of boiler along flue width |
| CN206724134U (en) * | 2017-04-24 | 2017-12-08 | 东方电气集团东方锅炉股份有限公司 | A kind of panelized-tube-wall section of pitches |
-
2019
- 2019-12-31 CN CN201911424717.8A patent/CN111256101A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1248683A (en) * | 1999-07-29 | 2000-03-29 | 上海交通大学 | Pitch changeable type superheater and reheater |
| CN102444886A (en) * | 2011-12-19 | 2012-05-09 | 清华大学 | Low-mass flow rate perpendicular water cooled wall arrangement method |
| CN102537994A (en) * | 2011-12-21 | 2012-07-04 | 西安交通大学 | Device for eliminating flue gas temperature deviation |
| CN105550522A (en) * | 2015-12-25 | 2016-05-04 | 东南大学 | Method for calculating thermal load uneven coefficient of high-temperature heating surface of boiler along flue width |
| CN206724134U (en) * | 2017-04-24 | 2017-12-08 | 东方电气集团东方锅炉股份有限公司 | A kind of panelized-tube-wall section of pitches |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815294A (en) * | 2021-02-02 | 2021-05-18 | 哈尔滨锅炉厂有限责任公司 | Novel boiler membrane type wall tube panel space behavior size positioning tool and method |
| CN115031257A (en) * | 2022-06-16 | 2022-09-09 | 西安热工研究院有限公司 | Water-cooled wall system for reducing steam temperature deviation of water-cooled wall outlet of ultra-supercritical boiler |
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Application publication date: 20200609 |