CN103438449A - Cyclone pulverized coal burner with secondary concentration - Google Patents

Cyclone pulverized coal burner with secondary concentration Download PDF

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Publication number
CN103438449A
CN103438449A CN2013103373714A CN201310337371A CN103438449A CN 103438449 A CN103438449 A CN 103438449A CN 2013103373714 A CN2013103373714 A CN 2013103373714A CN 201310337371 A CN201310337371 A CN 201310337371A CN 103438449 A CN103438449 A CN 103438449A
Authority
CN
China
Prior art keywords
air duct
pulverized coal
concentration
airduct
wind
Prior art date
Application number
CN2013103373714A
Other languages
Chinese (zh)
Inventor
樊保国
金燕
宋凯
刘海玉
乔晓磊
Original Assignee
太原理工大学
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.)
Filing date
Publication date
Application filed by 太原理工大学 filed Critical 太原理工大学
Priority to CN2013103373714A priority Critical patent/CN103438449A/en
Publication of CN103438449A publication Critical patent/CN103438449A/en

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Abstract

The invention discloses a cyclone pulverized coal burner with secondary concentration, which comprises a primary air duct (1), an internal secondary air duct (2) and an external secondary air duct (3), the internal secondary air duct (2) and the external secondary air duct (3) are mounted on one end of the primary air duct (1), a central pipe (4) which is concentric with the primary air duct (1) is mounted in the circle center of the primary air duct (1), a sawtoothed ring (5) is circumferentially mounted on the outlet end of the primary air duct (1), and guide vanes (6) are circumferentially mounted on the outside of the central pipe (4), and are located in the middle of the primary air duct (1). The cyclone pulverized coal burner utilizes the guide vanes and the sawtoothed ring to concentrate pulverized coal for the second time, so that the concentration of the pulverized coal at the outlet of the burner can be increased in order to decrease ignition heat; the sawtoothed ring and a primary wind flare are combined to form a backflow area, so that a favorable condition is provided for the ignition of the high-concentration pulverized coal; the entry of secondary wind can be delayed by the primary wind flare, consequently, ignition heat can be further decreased, and the emission of NOx in the process of burning can be reduced.

Description

A kind of vortex burner with secondary concentration

Technical field

The present invention relates to combustion apparatus processing and manufacturing field, be specifically related to a kind of vortex burner with secondary concentration.

Background technology

Bi-register swirl burner (referring to Fig. 1) is the Typical Representative of the station boiler vortex burner of generally acknowledging in the world, its main feature is to be all adjustable inside and outside two parts of air quantity and swirl strength by secondary air separating, be equipped with and be axially moveable blade in the inner second air road, adjustable tangential or axial blade is installed, with the ratio of regulating inside and outside Secondary Air and the swirl strength of air-flow in the outer second air road.In an airduct of this vortex burner, the current equalizer that breeze airflow is evenly distributed is housed, the primary wind and powder mixture is non-rotary direct jet, at the burner outlet place, wind and inner second air are mixed to form rich fuel fire district, required remaining air when outer second air feeds the completing combustion of stove fuel.But this vortex burner still has weak point, mainly is: (1) current equalizer is far away apart from furnace outlet, and the enrichment effect of coal dust weakens at the burner outlet place; (2) Secondary Air is sneaked into wind in advance one time, makes the required ignition heat of burning increase, and breeze airflow reaches ignition temperature needs more heat, causes the postponement of catching fire; (3) Secondary Air is sneaked into wind in advance one time, causes the NOx discharge bigger than normal.

Summary of the invention

The object of the invention is to provide a kind of vortex burner with secondary concentration, and it can solve existing problem in background technology effectively.

In order to solve existing problem in background technology, vortex burner with secondary concentration comprises an airduct 1 and is arranged on inner second air pipe 2 and the outer second air pipe 3 of one end, the circle centre position of a described airduct 1 is equipped with concentric central tube 4, the port of export of a described airduct 1 is equipped with saw-tooth ring 5 along circumference, the outside of described central tube 4 is equipped with guide vane 6 along circumference, and this guide vane 6 is positioned at the middle part of an airduct 1.

The port of export of a described airduct 1 is equipped with wind reamer 7 one time.

Owing to having adopted above technical scheme, the present invention has following beneficial effect:

(1) realize the secondary enrichment of coal dust by directing vane and saw-tooth ring, make the burner outlet coal powder density increase, to reduce ignition heat;

(2) saw-tooth ring and a wind reamer are in conjunction with forming recirculating zone, for catching fire of high concentration pulverized coal provides advantage;

(3) postpone Secondary Air by a wind reamer and sneak into, further reduce ignition heat, and reduce NOx discharge in combustion process.

The accompanying drawing explanation

In order to be illustrated more clearly in the present invention, below in conjunction with accompanying drawing, embodiment is briefly described.

Fig. 1 is the structural representation of Bi-register swirl burner in background technology of the present invention;

Fig. 2 is structural representation of the present invention.

The specific embodiment

For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.

Referring to Fig. 2, this specific embodiment is to be achieved by the following technical solutions, vortex burner with secondary concentration comprises an airduct 1 and is arranged on inner second air pipe 2 and the outer second air pipe 3 of one end, the circle centre position of a described airduct 1 is equipped with concentric central tube 4, the port of export of a described airduct 1 is equipped with saw-tooth ring 5 along circumference, the outside of described central tube 4 is equipped with guide vane 6 along circumference, and this guide vane 6 is positioned at the middle part of an airduct 1.

The port of export of a described airduct 1 is equipped with wind reamer 7 one time.

Below in conjunction with accompanying drawing, the technical scheme in this specific embodiment and principle thereof are further elaborated: after flowing to airduct 1 of burner containing a general mood of powder, process is arranged on the centrifugation of the guide vane 6 of central tube 4, denseer breeze airflow flows along the wall in an air channel, realizes the enrichment for the first time of coal dust; Be separated to the denseer breeze airflow of airduct 1 wall along with air-flow continues motion, the secondary enrichment that the saw-tooth ring 5 of installing airduct 1 outlet is realized coal dust, form the high concentration pulverized coal that is easy to catch fire at burner outlet, reduced the ignition heat of breeze airflow; Airduct 1 outlet, a wind reamer 7 is installed, catching fire that the recirculating zone that saw-tooth ring 5 and wind reamer 7 combinations form is high concentration pulverized coal provides advantage; When the needed Secondary Air of burning, during respectively by inner second air pipe 2 and outer second air pipe 3, one time wind reamer 7 has been postponed sneaking into of Secondary Air, reduces on the one hand the ignition heat of breeze airflow, reduces on the other hand NOx discharge in combustion process.

Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art should be appreciated that its technical scheme that still can put down in writing aforementioned each embodiment modifies, or part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (2)

1. the vortex burner with secondary concentration, it is characterized in that it comprises an airduct (1) and is arranged on inner second air pipe (2) and the outer second air pipe (3) of one end, the circle centre position of a described airduct (1) is equipped with concentric central tube (4), the port of export of a described airduct (1) is equipped with saw-tooth ring (5) along circumference, the outside of described central tube (4) is equipped with guide vane (6) along circumference, and this guide vane (6) is positioned at the middle part of an airduct (1).
2. a kind of vortex burner with secondary concentration according to claim 1, is characterized in that the port of export of a described airduct (1) is equipped with a wind reamer (7).
CN2013103373714A 2013-07-30 2013-07-30 Cyclone pulverized coal burner with secondary concentration CN103438449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013103373714A CN103438449A (en) 2013-07-30 2013-07-30 Cyclone pulverized coal burner with secondary concentration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013103373714A CN103438449A (en) 2013-07-30 2013-07-30 Cyclone pulverized coal burner with secondary concentration

Publications (1)

Publication Number Publication Date
CN103438449A true CN103438449A (en) 2013-12-11

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Family Applications (1)

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CN2013103373714A CN103438449A (en) 2013-07-30 2013-07-30 Cyclone pulverized coal burner with secondary concentration

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105465780A (en) * 2015-12-23 2016-04-06 杭州燃油锅炉有限公司 Ultralow NOx pulverized coal burner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201496957U (en) * 2009-07-31 2010-06-02 戴卫军 Cyclone pulverized coal burner
CN201517769U (en) * 2009-10-16 2010-06-30 东方锅炉(集团)股份有限公司 Swirl burner
CN101832550A (en) * 2010-06-18 2010-09-15 上海交通大学 Swirl pulverized-coal burner based on multi-level pulverized-coal concentration
CN102393015A (en) * 2011-05-27 2012-03-28 上海锅炉厂有限公司 Dense-phase spiral-flow pulverized-coal burner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201496957U (en) * 2009-07-31 2010-06-02 戴卫军 Cyclone pulverized coal burner
CN201517769U (en) * 2009-10-16 2010-06-30 东方锅炉(集团)股份有限公司 Swirl burner
CN101832550A (en) * 2010-06-18 2010-09-15 上海交通大学 Swirl pulverized-coal burner based on multi-level pulverized-coal concentration
CN102393015A (en) * 2011-05-27 2012-03-28 上海锅炉厂有限公司 Dense-phase spiral-flow pulverized-coal burner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105465780A (en) * 2015-12-23 2016-04-06 杭州燃油锅炉有限公司 Ultralow NOx pulverized coal burner

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Application publication date: 20131211

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