CN202835335U - Burner arrangement structure of power station boiler - Google Patents

Burner arrangement structure of power station boiler Download PDF

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Publication number
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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CN
China
Prior art keywords
burning
burner
station boiler
combustion
manner
Prior art date
Application number
CN 201220385876
Other languages
Chinese (zh)
Inventor
陈玉忠
石践
刘大猛
石航
Original Assignee
贵州电力试验研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 贵州电力试验研究院 filed Critical 贵州电力试验研究院
Priority to CN 201220385876 priority Critical patent/CN202835335U/en
Application granted granted Critical
Publication of CN202835335U publication Critical patent/CN202835335U/en

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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

A kind of burner arrangement structure of station boiler
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.
CN 201220385876 2012-08-06 2012-08-06 Burner arrangement structure of power station boiler CN202835335U (en)

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

Publications (1)

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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Country Link
CN (1) CN202835335U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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

EXPY Termination of patent right or utility model