CN201475997U - Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content - Google Patents

Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content Download PDF

Info

Publication number
CN201475997U
CN201475997U CN2009201928661U CN200920192866U CN201475997U CN 201475997 U CN201475997 U CN 201475997U CN 2009201928661 U CN2009201928661 U CN 2009201928661U CN 200920192866 U CN200920192866 U CN 200920192866U CN 201475997 U CN201475997 U CN 201475997U
Authority
CN
China
Prior art keywords
air
wind
airduct
air box
interior
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
CN2009201928661U
Other languages
Chinese (zh)
Inventor
池作和
丁守宝
成德芳
王红峻
邓龙强
孙公钢
刘富君
关键
王进卿
曾宪阳
朱霖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG SPECIAL EQUIPMENT INSPECTION AND RESEARCH INSTITUTE
Zhejiang Teffu Boiler Co Ltd
China Jiliang University
Original Assignee
ZHEJIANG SPECIAL EQUIPMENT INSPECTION AND RESEARCH INSTITUTE
Zhejiang Teffu Boiler Co Ltd
China Jiliang University
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 ZHEJIANG SPECIAL EQUIPMENT INSPECTION AND RESEARCH INSTITUTE, Zhejiang Teffu Boiler Co Ltd, China Jiliang University filed Critical ZHEJIANG SPECIAL EQUIPMENT INSPECTION AND RESEARCH INSTITUTE
Priority to CN2009201928661U priority Critical patent/CN201475997U/en
Application granted granted Critical
Publication of CN201475997U publication Critical patent/CN201475997U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

The utility model discloses a coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content. An external secondary air box is internally provided with a pre-burning chamber and a conical cylinder that is formed by the cone-expansion extension of an internal secondary air box; the large end of the conical cylinder is sheathed into a hole at one end of the pre-burning chamber, thus forming an external secondary wind tunnel; the wall surface at the other end of the pre-burning chamber, closed with the external end surface of the external secondary air box, is provided with a ring-shaped third wind tunnel; a central wind pipe is coaxially arranged in a primary wind pipe; the cone-expansion ends of the primary wind pipe and the central wind pipe are arranged in the conical cylinder; the internal secondary wind pipe is sheathed outside the primary wind pipe; a swirl impeller capable of rotating in axial direction is arranged in the internal secondary wind pipe; the external end of the swirl impeller is provided with a pull rod of the internal secondary wind impeller; the ring-shaped passage of a clapboard is provided with a wind regulator; the external end of the wind regulator is provided with a wind regulating pull rod; and sliding ribs that are matched with the internal secondary air box in a sliding way are arranged on the circumference of the internal end of the wind regulating pull rod at equal distance. The coal dust burner has strong self-stabilizing capability and adjustable flame position, can prevent the pre-burning chamber from slag-bonding, has low NOx emission, and can be applied to various industrial coal dust boilers.

Description

A kind of three grades of air distribution low-NOx pulverized coal burners with self-stable ability
Technical field
The utility model relates to a kind of coal burner, relates in particular to a kind of three grades of air distribution low-NOx pulverized coal burners with self-stable ability.
Background technology
The coal-burned industrial boiler of China is in the majority with chain furnace, and its actual operating efficiency has only about 65%, and energy utilization rate is low.And the industrial coal powder boiler of employing suspension combustion mode then has higher boiler efficiency.Coal dust burning on Industrial Boiler, the design of burner are crucial.Because the furnace cavity of Industrial Boiler is less, this just requires burner should be able to organize the interior flow field of stove preferably, and coal dust can be burnt efficiently and stably, can avoid ash erosion to produce, and has low NO simultaneously again XDischarge function.And the coal burner of putting into operation now is applied to power plant mostly, is applicable to that the coal burner of Industrial Boiler is then less.
Summary of the invention
At the problem of above existence, the purpose of this utility model is to provide a kind of three grades of air distribution low-NOx pulverized coal burners with self-stable ability that are applicable to that Industrial Boiler is used.
The technical solution adopted in the utility model is:
Secondary air box of the present utility model is divided into interior secondary air box and the outer secondary air box that the secondary wind inlet is arranged by the dividing plate that the center has circular hole, the conically shaped that columnar precombustion chamber and interior secondary air channel reamer extend to form is set in the described outer secondary air box, the coaxial sky of precombustion chamber overlaps outside in the secondary air box, have the tertiary air road of annular on the wall of one end of precombustion chamber and the sealing of outer secondary air box outer face, the aperture that the big end of conically shaped is inserted in the other end of precombustion chamber forms annular outer secondary air duct; In the described interior secondary air box, central air hose is coaxial to be installed in airduct, the central air hose import is passed wind pipe wall and is tilted to be installed on airduct, and the reamer end of airduct and central air hose all is positioned at conically shaped, and the reamer of central air hose exposes outside airduct; Interior secondary air channel is set in outside airduct, be axially moveable the eddy flow impeller be installed in in the secondary air channel, be axially moveable the eddy flow impeller outer install in secondary fan blade pull bar, be axially moveable eddy flow impeller inner ring and an airduct outer ring for being slidingly matched; The place, circular passage of dividing plate is equipped with air register, and the air register outer end is installed and transferred the wind pull bar, and five equilibrium is installed slip muscle sheet on the inner circumference of accent wind pull bar, and slip muscle sheet and interior secondary air box are for being slidingly matched.
The cone angle of the reamer end of a described airduct and central air hose is identical, is 90 °~100 °.
The beneficial effect that the utlity model has is:
1, the utility model is provided with swirl vane in secondary air channel, makes through the air-flow of swirl vane and produces rotation, is formed with to be beneficial to the recirculating zone that catches fire, and makes that coal dust is easier to be lighted;
2, eddy flow impeller of the present utility model is arranged to be axially moveable, the swirl strength of secondary wind in conveniently regulating, thus regulate the interior air current flow situation of burner, improve combustion efficiency;
3, secondary air box dividing plate of the present utility model has the circular passage, secondary air box and outer secondary air box in the UNICOM, air register is installed at the place, circular passage, and this device can flexible modulation enter the air quantity of outer secondary air box, thereby regulate the air quantity ratio of inside and outside secondary wind, improve the combustion case in the burner;
4, the utility model has adopted precombustion chamber, can form the thermal source that makes breeze airflow stable ignition and burning in precombustion chamber;
5, the utlity model has center wind, adjustable coal saving powder ignition point;
6, three grades of air distribution modes of secondary wind, outer secondary wind and tertiary air both can prevent the precombustion chamber slagging scorification in the utility model adopted, and had the NOx of reduction discharge function again;
7, new structure of the present utility model is evenly distributed the ignition temperature of pulverized coal flame in boiler furnace, the phenomenon of hot-spot can not occur;
8, the utility model is applicable to various small and medium-sized industrial coal powder boilers, in use has higher efficiency of combustion.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present utility model.
Fig. 2 is the A enlarged drawing of Fig. 1.
Fig. 3 is that the B-B of Fig. 1 is to view.
Fig. 4 is a structural representation of transferring the wind pull bar.
Fig. 5 is the upward view of Fig. 4.
Among the figure: 1, airduct, 2, central air hose, 3, the central air hose import, 4, interior secondary air channel, 5, outer secondary air duct, 6, the tertiary air road, 7, precombustion chamber, 8, dividing plate, 9, interior secondary air box, 10, outer secondary air box, 11, secondary wind inlet, 12, reamer, 13, be axially moveable the eddy flow impeller, 14, interior secondary fan blade pull bar, 15, the circular passage, 16, air register, 17, transfer the wind pull bar, 18, flange, 19, slip muscle sheet.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As Fig. 1~shown in Figure 5, secondary air box of the present utility model is divided into interior secondary air box 9 and the outer secondary air box 10 that secondary wind inlet 11 is arranged by the dividing plate 8 that the center has circular hole, the conically shaped that columnar precombustion chamber 7 and interior secondary air channel 4 reamers extend to form is set in the described outer secondary air box 10, precombustion chamber 7 coaxial skies overlap outside in the secondary air box 10, have the tertiary air road 6 of annular on the wall of one end of precombustion chamber 7 and the sealing of outer secondary air box 10 outer faces, the aperture that the big end of conically shaped is inserted in the other end of precombustion chamber 7 forms annular outer secondary air duct 5; In the described interior secondary air box 9, central air hose 2 is coaxial to be installed in airduct 1, central air hose import 3 is passed wind pipe wall and is tilted to be installed on airduct 1, and the reamer end of airduct 1 and central air hose 2 all is positioned at conically shaped, and the reamer 12 of central air hose 2 exposes outside airduct 1; Interior secondary air channel 4 is set in outside airduct 1, be axially moveable eddy flow impeller 13 be installed in in the secondary air channel 4, be axially moveable secondary fan blade pull bar 14 in eddy flow impeller 13 outer the installations, be axially moveable eddy flow impeller 13 inner rings and airduct 1 outer ring for being slidingly matched; 15 places, circular passage of dividing plate 8 are equipped with air register 16, and air register 16 outer ends are installed and transferred wind pull bar 17, and five equilibrium is installed slip muscle sheet 19 on the inner circumference of accent wind pull bar 17, and slip muscle sheet 19 and interior secondary air box 9 are for being slidingly matched.
The cone angle of the reamer end of a described airduct 1 and central air hose 2 is identical, is 90 °~100 °.
Secondary fan blade pull bar 14 and accent wind pull bar 17 usefulness flanges 18 are supported on the burner front end in described.
When the utility model is installed, an airduct 1 is connected power transportation pipe (not marking among Fig. 1), central air hose import 3 and secondary wind inlet 11 are connected a blower fan (not shown in figure 1) respectively, whole burner is connected on the fire tube of horizontal industrial pulverized-coal fired boiler device with flange.
The course of work of the present utility model is as follows:
Burner hearth is earlier with after 10 seconds of igniting air gun (not shown in figure 1) preheating, open blower fan, breeze airflow is entered by an airduct 1, reamer 10 places ejection along central air hose 2, and the combustion gas of having been burnt is lighted, open secondary wind inlet 11 simultaneously, at this moment, secondary wind enters interior secondary air box 9, and enters outer secondary air box 10 by the circular passage on the dividing plate 8 15, then respectively by interior secondary air channel 4, outer secondary air duct 5 enters burner, and there is the part air to enter burner hearth by tertiary air road 6, secondary wind in realizing, three grades of air distribution modes of outer secondary wind and tertiary air reach air classification and supply with, and reduce NO XDischarging.Coal dust lighted and with combustion gas cofiring after 10 seconds, close the igniting air gun, fully by coal dust firing.After the air communication of interior secondary air channel 4 is crossed and is axially moveable eddy flow impeller 13, produce rotation, (promptly at central air hose reamer 12 afterbodys) form the recirculating zone at the center behind the outflow spout, entrainment the high-temperature flue gas in the stove, heating and firing coal-dust.The swirl strength of interior secondary general mood stream is regulated by being axially moveable swirl vane 13, and secondary fan blade pull bar 14 can be realized the continuous adjusting of swirl strength in stretching, thereby improves combustion efficiency.The air-flow of outer secondary air duct 5 flows along precombustion chamber 7 walls, not only provides the coal dust after burning required oxygen, and has effectively prevented slagging scorification in the precombustion chamber 7.Outer secondary general mood stream is regulated by the air register 16 at 15 places, dividing plate circular passage, transfers wind pull bar 17 can regulate outer secondary wind air quantity by stretching.The ignition point of coal dust can be regulated by the wind speed that changes in the central air hose 2.

Claims (2)

1. three grades of air distribution low-NOx pulverized coal burners with self-stable ability, it is characterized in that: the dividing plate (8) that secondary air box has a circular hole by the center is divided into interior secondary air box of secondary wind inlet (11) (9) and outer secondary air box (10), the conically shaped that columnar precombustion chamber (7) and interior secondary air channel (4) reamer extend to form is set in the described outer secondary air box (10), the coaxial sky of precombustion chamber (7) overlaps outside in the secondary air box (10), have the tertiary air road (6) of annular on the wall of one end of precombustion chamber (7) and the sealing of outer secondary air box (10) outer face, the aperture that the big end of conically shaped is inserted in the other end of precombustion chamber (7) forms annular outer secondary air duct (5); In the described interior secondary air box (9), central air hose (2) is coaxial to be installed in the airduct (1), central air hose import (3) is passed a wind pipe wall and is tilted to be installed on the airduct (1), the reamer end of an airduct (1) and central air hose (2) all is positioned at conically shaped, and the reamer (12) of central air hose (2) exposes outside the airduct (1); Interior secondary air channel (4) is set in outside the airduct (1), being axially moveable eddy flow impeller (13) is installed in the interior secondary air channel (4), be axially moveable secondary fan blade pull bar (14) in the outer installation of eddy flow impeller (13), be axially moveable eddy flow impeller (13) inner ring and an airduct (1) outer ring for being slidingly matched; Air register (16) is located to be equipped with in the circular passage (15) of dividing plate (8), air register (16) outer end is installed and is transferred wind pull bar (17), five equilibrium is installed slip muscle sheet (19) on the inner circumference of accent wind pull bar (17), and slip muscle sheet (19) and interior secondary air box (9) are for being slidingly matched.
2. a kind of three grades of air distribution low-NOx pulverized coal burners with self-stable ability according to claim 1, it is characterized in that: a described airduct (1) is identical with the cone angle of the reamer end of central air hose (2), is 90 °~100 °.
CN2009201928661U 2009-08-31 2009-08-31 Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content Expired - Lifetime CN201475997U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201928661U CN201475997U (en) 2009-08-31 2009-08-31 Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009201928661U CN201475997U (en) 2009-08-31 2009-08-31 Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content

Publications (1)

Publication Number Publication Date
CN201475997U true CN201475997U (en) 2010-05-19

Family

ID=42412249

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009201928661U Expired - Lifetime CN201475997U (en) 2009-08-31 2009-08-31 Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content

Country Status (1)

Country Link
CN (1) CN201475997U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101644431B (en) * 2009-08-31 2011-02-02 中国计量学院 Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner
CN102338376A (en) * 2010-07-23 2012-02-01 烟台龙源电力技术股份有限公司 Pulverized coal burner
CN103629663A (en) * 2013-11-15 2014-03-12 东方电气集团东方锅炉股份有限公司 Swirl pulverized coal burner
CN103697468A (en) * 2014-01-14 2014-04-02 北京大邦实创节能技术服务有限公司 Burner with easy ignition and stable burning
CN106287667A (en) * 2016-10-08 2017-01-04 西安交通大学 A kind of high temperature gases recirculating preheating type low-NOx combustor being provided with SOFA

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101644431B (en) * 2009-08-31 2011-02-02 中国计量学院 Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner
CN102338376A (en) * 2010-07-23 2012-02-01 烟台龙源电力技术股份有限公司 Pulverized coal burner
CN102338376B (en) * 2010-07-23 2015-07-29 烟台龙源电力技术股份有限公司 A kind of coal burner
CN103629663A (en) * 2013-11-15 2014-03-12 东方电气集团东方锅炉股份有限公司 Swirl pulverized coal burner
CN103629663B (en) * 2013-11-15 2016-02-24 东方电气集团东方锅炉股份有限公司 Vortex burner
CN103697468A (en) * 2014-01-14 2014-04-02 北京大邦实创节能技术服务有限公司 Burner with easy ignition and stable burning
CN103697468B (en) * 2014-01-14 2016-06-01 北京大邦实创节能技术服务有限公司 One is easy to igniting and combustion stablized burner
CN106287667A (en) * 2016-10-08 2017-01-04 西安交通大学 A kind of high temperature gases recirculating preheating type low-NOx combustor being provided with SOFA
CN106287667B (en) * 2016-10-08 2018-10-30 西安交通大学 A kind of high temperature gases recirculating preheating type low-NOx combustor equipped with SOFA

Similar Documents

Publication Publication Date Title
CN101644431B (en) Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner
CN203099814U (en) Pulverized coal burner
CN101725969B (en) Low-NOx pulverized coal burner
CN201680364U (en) Efficient low NOx pulverized coal burner for small and medium-sized industrial boilers
CN201475997U (en) Coal dust burner with self-stabilizing capability, three-stage air-distribution and low NOx content
CN105465780A (en) Ultralow NOx pulverized coal burner
CN204704817U (en) A kind of low nitrogen oxide gas burner
CN102537951B (en) Central diffusion type tiny-oil ignition combustor
CN104595900A (en) Low-nitrogen-oxide gas combustor and combustion method of combustor
CN104180368A (en) Medium-and-low temperature hot fume powder feeding type coal powder combustion device and combustion process thereof
CN101696802B (en) Coal type less oil ignition burner capable of controlling vortex width
CN101718432B (en) Swirl injection type pulverized fuel burner
CN106439801B (en) A kind of reverse spray type bluff body vortex burner
CN201273568Y (en) Graded wind-adjusting low-nitrogen/oxygen multi-fuel combustion combustor
CN205402704U (en) Two -stage adjustable steam plasma cyclone burner
CN201496958U (en) W-flame cyclone separation low-oil ignition burner
CN203731402U (en) A dual-air-regulating pulverized coal burner for an industrial pulverized coal boiler
CN203464270U (en) Novel two-cyclone oxygen-rich micro-oil ignition stable combustion coal powder combustor
CN206739256U (en) A kind of single backhaul WNS structure boilers
CN202647746U (en) Real-time adjustable novel swirl burner
CN205579553U (en) Ultralow NOx coal burner
CN104154532A (en) Center air ring concentrated type turbulent burner
CN206398720U (en) Cross-mixing formula eddy flow air register
CN102620295B (en) Industrial radial concentration dual-air regulation rotational flow coal powder and fuel gas mixed combustor
CN201606876U (en) Low-NOx coal burner

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20100519

Effective date of abandoning: 20090831