CN102777892A - Burner arrangement method and arrangement structure for power station boiler - Google Patents
Burner arrangement method and arrangement structure for power station boiler Download PDFInfo
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- CN102777892A CN102777892A CN2012102768280A CN201210276828A CN102777892A CN 102777892 A CN102777892 A CN 102777892A CN 2012102768280 A CN2012102768280 A CN 2012102768280A CN 201210276828 A CN201210276828 A CN 201210276828A CN 102777892 A CN102777892 A CN 102777892A
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- burner hearth
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Abstract
The invention discloses a burner arrangement method and arrangement structure for a power station boiler. The method disclosed by the invention is characterized in that a pulverized coal burner is arranged by adopting a manner of combining tangential combustion and opposed combustion. The burner arrangement method and arrangement structure disclosed by the invention have the beneficial effects that combustion stability and economy problems of a boiler are solved firstly and less NOx is discharged. By virtue of massive research and calculation by the inventor, results show that the tangential combustion manner has better economy and less NOx discharge but has poor combustion stability, if the combustion stability is better and a flame is used for supporting combustion, the characteristics of the tangential combustion can be fully played. A symmetric combustion manner has better whole combustion stability as a single burner has stronger combustion stabilizing capability and has poor combustion economy as a combustion stroke is shorter, and NOx discharge is higher as a local high temperature region is formed by higher power of the single burner. Thus, if the advantages of the two combustion manners are combined to form a new combustion manner, better combustion effects can be achieved.
Description
Technical field
The present invention relates to a kind of burner arrangement method and arrangement of station boiler, belong to boiler combustion and design field.
Background technology
The main combustion system of station boiler is the circle of contact and the dual mode that liquidates at present.The circle of contact has quadrangle tangential circle and the two circle of contact dual modes of burner hearth; Symmetry has front-back wall horizontal symmetrical and W flame symmetry dual mode.The circle of contact respectively has pluses and minuses with the two kinds of combustion systems that liquidate.Corner tangential firing leans on upstream and downstream to support mutually and forms stable combustion flame, and flame rotates in stove and makes flame travel long, and the burning economy is higher, and NOx content is lower simultaneously; But the antijamming capability of burning is lower, and the furnace outlet temperature both sides deviation of bringing because of tangential firing simultaneously is bigger.The parallel burning of each burner of opposed firing (see figure 3), it is little to interact, and single burner independent burning stability is stronger; Furnace outlet temperature both sides deviation is less, but because symmetrical combustion flame stroke is short partially, the burning economy is relatively poor; Because partial combustion intensity is big, NOx content is high simultaneously.
Summary of the invention
The technical problem that the present invention will solve is, provides a kind of and can improve boiler combustion stability and economy, reduces the burner arrangement method and the arrangement of the station boiler of NOx discharging, can overcome the deficiency of prior art.
Technical scheme of the present invention is: the burner arrangement method of station boiler be adopt tangential firing and opposed firing mutually the mode of tuberculosis arrange coal burner.
Tangential firing is positioned at the burner hearth center, forms a quadrangle tangential circle by four coal burners that are positioned at the burner hearth center; Opposed firing is positioned at the burner hearth both sides, and every side can be provided with one group or two groups of symmetry coal burners.
Coal burner is arranged on the front-back wall of burner hearth.
The coal burner that is arranged on the front-back wall of burner hearth is the 3-5 layer according to boiler capacity.
The burner arrangement structure of station boiler; It comprises the burner hearth of station boiler; On the front-back wall of burner hearth, be inserted with coal burner, establish four coal burners in the center of burner hearth front-back wall and form a circle of contact, one group or two groups of symmetry coal burners are set in every side of burner hearth front-back wall.
The number of plies that is arranged on the coal burner on the front-back wall of burner hearth is the 3-5 layer.
Compare with prior art, beneficial effect of the present invention at first is embodied in and solves boiler combustion stability and economy problems, simultaneously less NOx discharging.Through applicant's big quantity research and calculating, though find tangential firing mode better economy, the NOx discharge capacity is lower, and combustion stability is relatively poor, if there is combustion stability better with flame its burning to be formed support, then can give full play to the tangential firing characteristics.The symmetry combustion system since single burner surely to fire ability stronger, integral combustion stability better, but because fire stroke is shorter, the burning economy is relatively poor, by single the more high-power localized high temperature regions that forms of burner, causes the NOx discharging higher.This shows,, form a kind of new combustion system, can reach preferable combustion efficiency if can combine the advantage of two kinds of combustion systems.
The method for arranging and the mode of this coal burner also have the following advantages simultaneously:
1. efficiency of combustion is high, because the tangential firing mode at burner hearth center has guaranteed the whole breeze airflow stroke of burning, efficiency of combustion is able to guarantee.
2. combustion stability is high, because the burner hearth both sides are symmetrical combustion system, it is strong that single burner of symmetrical burner surely fires ability, and the tangential firing mode at burner hearth center is formed strong support, has increased the whole antijamming capability of burner hearth.
3.NOx discharge capacity reduces, because burner hearth integral combustion mode is circle of contact state, the combustion-gas flow of rotation has been avoided burning localized hyperthermia state, helps reducing the NOx discharge capacity.
In sum, adopt combustion system of the present invention after, can practice thrift cost and the discharging that reduces the NOx pollutant significantly, have good economic worth and use value.With the 600MW unit boiler, coal-fired V
DafBe 20% to compare for example:
| Project | Boiler efficiency | Combustion stability | The NOx discharging |
| Tangential firing | 92% | Low | 600 mg/Nm 3 |
| The symmetry burning | 91% | High | 800 mg/Nm 3 |
| Circle of contact symmetrical junction combination burning | 92% | High | 500 mg/Nm 3 |
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
The embodiment of the invention: as shown in Figure 1, the burner arrangement method of station boiler be adopt tangential firing and opposed firing mutually the mode of tuberculosis arrange coal burner.Concrete grammar is that tangential firing is positioned at the burner hearth center, forms a corner tangential firing technology by four coal burners that are positioned at the burner hearth center; Opposed firing is positioned at the burner hearth both sides, and every side can be provided with one group or two groups of symmetry coal burners, forms the opposed firing technology.
The burner arrangement structure of station boiler is: body is provided with coal burner 2 on the front-back wall of burner hearth 1; Establish four coal burners 2 in the center of burner hearth 1 front-back wall and form a circle of contact; Constitute corner tangential firing technical pattern; Every side at burner hearth 1 front-back wall is provided with one group or two groups of symmetry coal burners 2 simultaneously, constitutes opposed firing technical pattern.
The number of plies that is arranged on the coal burner 2 on the front-back wall of burner hearth 1 is the 3-5 layer, and it is fixed that the concrete number of plies is come according to boiler capacity.
Claims (6)
1. the burner arrangement method of a station boiler is characterized in that: this method be adopt tangential firing and opposed firing mutually the mode of tuberculosis arrange coal burner.
2. the combustion method of station boiler according to claim 1, it is characterized in that: tangential firing is positioned at the burner hearth center, forms a quadrangle tangential circle by four coal burners that are positioned at the burner hearth center; Opposed firing is positioned at the burner hearth both sides, and every side can be provided with one group or two groups of symmetry coal burners.
3. the combustion method of station boiler according to claim 2, it is characterized in that: coal burner is arranged on the front-back wall of burner hearth.
4. according to the combustion method of claim 2 or 3 described station boilers, it is characterized in that: the coal burner that is arranged on the front-back wall of burner hearth is the 3-5 layer according to boiler capacity.
5. the burner arrangement structure of a station boiler; It comprises the burner hearth (1) of station boiler; On the front-back wall of burner hearth (1), be provided with coal burner; It is characterized in that: four coal burners (2) are set in the center of burner hearth (1) front-back wall form a circle of contact, one group or two groups of symmetry coal burners (2) are set in every side of burner hearth (1) front-back wall.
6. the burner arrangement structure of station boiler according to claim 5 is characterized in that: the number of plies that is arranged on the coal burner (2) on the front-back wall of burner hearth (1) is the 3-5 layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210276828.0A CN102777892B (en) | 2012-08-06 | 2012-08-06 | The burner arrangement method of station boiler and arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210276828.0A CN102777892B (en) | 2012-08-06 | 2012-08-06 | The burner arrangement method of station boiler and arrangement |
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| Publication Number | Publication Date |
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| CN102777892A true CN102777892A (en) | 2012-11-14 |
| CN102777892B CN102777892B (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210276828.0A Active CN102777892B (en) | 2012-08-06 | 2012-08-06 | The burner arrangement method of station boiler and arrangement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871112A (en) * | 2017-04-07 | 2017-06-20 | 贵州电网有限责任公司电力科学研究院 | A kind of burner and coal pulverizer matching process for being punched circle combustion system station boiler |
| CN106871113A (en) * | 2017-04-07 | 2017-06-20 | 贵州电网有限责任公司电力科学研究院 | A kind of system of selection of the burner model of the tangential firing mode station boiler that liquidates |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08178203A (en) * | 1994-12-19 | 1996-07-12 | Babcock Hitachi Kk | Steam generator |
| JP2002243108A (en) * | 2001-02-19 | 2002-08-28 | Babcock Hitachi Kk | Mixed-fuel fired device of coal and biofuel and operating method thereof |
| US20030148236A1 (en) * | 2002-02-05 | 2003-08-07 | Joshi Mahendra Ladharam | Ultra low NOx burner for process heating |
| CN1807977A (en) * | 2006-02-21 | 2006-07-26 | 西安热工研究院有限公司 | Novel three-region two-stage overfire air arrangement mode for wall type boiler |
| CN202532467U (en) * | 2011-12-23 | 2012-11-14 | 上海锅炉厂有限公司 | Arrangement method of micro-oil ignition device |
| CN202835335U (en) * | 2012-08-06 | 2013-03-27 | 贵州电力试验研究院 | Burner arrangement structure of power station boiler |
-
2012
- 2012-08-06 CN CN201210276828.0A patent/CN102777892B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08178203A (en) * | 1994-12-19 | 1996-07-12 | Babcock Hitachi Kk | Steam generator |
| JP2002243108A (en) * | 2001-02-19 | 2002-08-28 | Babcock Hitachi Kk | Mixed-fuel fired device of coal and biofuel and operating method thereof |
| US20030148236A1 (en) * | 2002-02-05 | 2003-08-07 | Joshi Mahendra Ladharam | Ultra low NOx burner for process heating |
| CN1807977A (en) * | 2006-02-21 | 2006-07-26 | 西安热工研究院有限公司 | Novel three-region two-stage overfire air arrangement mode for wall type boiler |
| CN202532467U (en) * | 2011-12-23 | 2012-11-14 | 上海锅炉厂有限公司 | Arrangement method of micro-oil ignition device |
| CN202835335U (en) * | 2012-08-06 | 2013-03-27 | 贵州电力试验研究院 | Burner arrangement structure of power station boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871112A (en) * | 2017-04-07 | 2017-06-20 | 贵州电网有限责任公司电力科学研究院 | A kind of burner and coal pulverizer matching process for being punched circle combustion system station boiler |
| CN106871113A (en) * | 2017-04-07 | 2017-06-20 | 贵州电网有限责任公司电力科学研究院 | A kind of system of selection of the burner model of the tangential firing mode station boiler that liquidates |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102777892B (en) | 2015-08-19 |
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