CN202835335U - Burner arrangement structure of power station boiler - Google Patents
Burner arrangement structure of power station boiler Download PDFInfo
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- CN202835335U CN202835335U CN 201220385876 CN201220385876U CN202835335U CN 202835335 U CN202835335 U CN 202835335U CN 201220385876 CN201220385876 CN 201220385876 CN 201220385876 U CN201220385876 U CN 201220385876U CN 202835335 U CN202835335 U CN 202835335U
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- Prior art keywords
- burning
- burner
- station boiler
- combustion
- manner
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound data:image/svg+xml;base64,<?xml version='1.0' encoding='iso-8859-1'?>
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 [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003245 coal Substances 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 29
- 238000010304 firing Methods 0.000 description 16
- 229910002089 NOx Inorganic materials 0.000 description 10
- 238000007599 discharging Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 201000008827 tuberculosis Diseases 0.000 description 1
Abstract
The utility model discloses a burner arrangement structure of a power station boiler. The burner arrangement structure of the power station boiler comprises a furnace of the power station boiler. Pulverized coal burners are arranged on the front wall and the back wall of the furnace, four pulverized coal burners are respectively arranged on middle portion of the front wall and the back wall of the furnace to form a tangent circle, and each side of the front wall and the back wall of the furnace is provided with a set or two sets of symmetrical pulverized coal burners. An applicant finds that though a tangent circle burning manner is good in economy and low in NO x discharge amount, the tangent circle burning manner is bad in burning stability, if burning of the tangent circle burning manner is supported by flame which is good in burning stability, and then burning characteristics of the tangent circle can be fully realized. In a symmetrical burning manner, due to the fact that a single burner is good in steady burning performance and is good in whole burning stability, but burning stroke is short and burning economy is poor, a local high temperature area is formed by higher power of the single burner, and the NO x discharge is large. To sum up, better burning effect can be achieved by combining advantages of the two burning manners to form a novel burning manner.
Description
Technical field
The utility model relates to a kind of burner arrangement structure of station boiler, belongs 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 the symmetrical dual mode of W flame.The circle of contact and the two kinds of combustion systems that liquidate respectively have pluses and minuses.The top downstream of corner tangential firing is supported mutually and is formed stable combustion flame, and flame rotates so that flame travel is long in stove, and combustion economization is higher, and NOx content is lower simultaneously; But the antijamming capability of burning is lower, and the furnace exit temperature both sides deviation of bringing because of tangential firing simultaneously is larger.The parallel burning of each burner of opposed firing interacts little, and single burner independent burning stability is stronger, furnace exit temperature both sides deviation is less, but because the symmetrical combustion flame travel is partially short, combustion economization is relatively poor, because partial combustion intensity is large, NOx content is high simultaneously.
Summary of the invention
The technical problems to be solved in the utility model is, provides a kind of and can improve boiler combustion stability and economy, and the burner arrangement structure of the station boiler of reduce NOx emission can overcome the deficiencies in the prior art.
The technical solution of the utility model is: the burner arrangement structure of station boiler, it comprises the burner hearth of station boiler, front-back wall at burner hearth is inserted with coal burner, install four coal burners at the centre bit of burner hearth front-back wall and form a circle of contact, in every side of burner hearth front-back wall one group or two groups of symmetrical coal burners are set.
The number of plies that is arranged on the coal burner on the front-back wall of burner hearth is the 3-5 layer.
Compared with the prior art, the beneficial effects of the utility model at first are embodied in and solve boiler combustion stability and economy problems, simultaneously less NOx discharging.Through applicant's large quantity research and calculating, although find tangential firing mode better economy, the NOx discharge capacity is lower, and combustion stability is relatively poor, if combustion stability is arranged better and flame its burning is formed support, then can give full play to the tangential firing characteristics.The symmetrical combustion mode by the localized high temperature regions that single burner relatively high power forms, causes the NOx discharging higher because single burner stable combustion ability is stronger, and integral combustion stability is better, but shorter owing to fire stroke, combustion economization is relatively poor.This shows, if can form a kind of new combustion system in conjunction with the advantage of two kinds of combustion systems, can reach better combustion efficiency.
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 guaranteed.
2. combustion stability is high, because the burner hearth both sides are the symmetrical combustion mode, single burner stable combustion of symmetrical combustion device ability is strong, and the tangential firing mode at burner hearth center is formed strong support, has increased the antijamming capability of burner hearth integral body.
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, is conducive to reduce the NOx discharge capacity.
In sum, adopt combustion system of the present utility model after, can significantly save cost and reduce the discharging of NOx pollutant, 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 |
| Symmetrical combustion | 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 structural representation of the present utility model.
The specific embodiment
The utility model embodiment: as shown in Figure 1, the burner arrangement method of station boiler is to adopt tangential firing to arrange coal burner with the mode of opposed firing phase tuberculosis.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 arrange one group or two groups of symmetrical coal burners 3, forms the opposed firing technology.
The burner arrangement structure of station boiler is: body is provided with coal burner 2 at the front-back wall of burner hearth 1, centre bit at burner hearth 1 front-back wall installs circle of contact of four coal burners, 2 formation, consist of corner tangential firing technical pattern, every side at burner hearth 1 front-back wall arranges one group or two groups of symmetrical coal burners 3 simultaneously, consists of opposed firing technical pattern.
The number of plies that is arranged on the coal burner 3 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 (2)
1. the burner arrangement structure of a station boiler, it comprises the burner hearth (1) of station boiler, front-back wall at burner hearth (1) is 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, in every side of burner hearth (1) front-back wall one group or two groups of symmetrical coal burners (3) are set.
2. the burner arrangement structure of station boiler according to claim 1 is characterized in that: the number of plies that is arranged on the coal burner (3) on the front-back wall of burner hearth (1) is the 3-5 layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385876 CN202835335U (en) | 2012-08-06 | 2012-08-06 | Burner arrangement structure of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385876 CN202835335U (en) | 2012-08-06 | 2012-08-06 | Burner arrangement structure of power station boiler |
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| Publication Number | Publication Date |
|---|---|
| CN202835335U true CN202835335U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220385876 CN202835335U (en) | 2012-08-06 | 2012-08-06 | Burner arrangement structure of power station boiler |
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| CN (1) | CN202835335U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777892A (en) * | 2012-08-06 | 2012-11-14 | 贵州电力试验研究院 | Burner arrangement method and arrangement structure for power station boiler |
| CN104633652A (en) * | 2014-12-15 | 2015-05-20 | 西安热工研究院有限公司 | Burning system of opposite firing boiler |
-
2012
- 2012-08-06 CN CN 201220385876 patent/CN202835335U/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777892A (en) * | 2012-08-06 | 2012-11-14 | 贵州电力试验研究院 | Burner arrangement method and arrangement structure for power station boiler |
| CN102777892B (en) * | 2012-08-06 | 2015-08-19 | 贵州电力试验研究院 | The burner arrangement method of station boiler and arrangement |
| CN104633652A (en) * | 2014-12-15 | 2015-05-20 | 西安热工研究院有限公司 | Burning system of opposite firing boiler |
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| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20150806 |
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| EXPY | Termination of patent right or utility model |