CN205579553U - Ultralow NOx coal burner - Google Patents

Ultralow NOx coal burner Download PDF

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Publication number
CN205579553U
CN205579553U CN201521095354.5U CN201521095354U CN205579553U CN 205579553 U CN205579553 U CN 205579553U CN 201521095354 U CN201521095354 U CN 201521095354U CN 205579553 U CN205579553 U CN 205579553U
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CN
China
Prior art keywords
air
cyclone
ultralow
tuber pipe
coal burner
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CN201521095354.5U
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Chinese (zh)
Inventor
刘丹
苏为晃
王改
胡鸣
胡一鸣
周海能
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杭州燃油锅炉有限公司
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    • Y02E20/344

Abstract

The utility model discloses an ultralow NOx coal burner, interior tuber pipe of a tuber pipe, secondary and the outer tuber pipe of secondary including secondary wind box, electronic air register, coaxial setting, secondary wind box in be equipped with in secondary plenum and outer secondary plenum, interior secondary plenum one end with tuber pipe and secondary in interior secondary air duct UNICOM between the tuber pipe, the other end is equipped with first backward flow wind gap and interior secondary air nozzle, outer secondary plenum one end with the secondary in outer secondary air duct UNICOM between the outer tuber pipe of tuber pipe and secondary, the other end is equipped with second backward flow wind gap and outer secondary air nozzle. The utility model discloses a hypoxemia wind of different concentration is realized sending in grades in two wind channels, reduces the oxygen concentration of combustion area and the peak temperature of flame as far as possible for the oxygen debt burning of buggy makes the combustion area environment be in reducing atmosphere, and the flame root forms the rich fuel region of oxygen deficiency, can effectively reduce NOx's production, realizes that low NOx discharges, satisfies the environmental protection requirement.

Description

A kind of ultralow NOxCoal burner

Technical field

This utility model relates to a kind of coal burner, especially with regard to a kind of be suitable in industrial coal powder boiler using there is steady combustion, ultralow NOxTurbulent burner is put at the end of discharge.

Background technology

China's energy resource structure is still based on coal, and industry coal-boiler occupies energy resource consumption significant proportion.Existing coal-burned industrial boiler is in the majority with chain fire-gate grate firing boiler, and operational efficiency is low.And the industrial coal powder boiler using floater to fire, then there is high energy utilization rate.In traditional coal powder burner, it is used in the large-sized boiler of electricity generation boiler, it is impossible to directly apply to middle-size and small-size industrial coal powder boiler more.Develop a kind of be suitable for small and medium-sized industrial coal powder boilers use can stability and high efficiency tissue coal dust firing, while there is again ultralow NOxThe coal burner of discharge, meets national energy policy, is also market in urgent need.

Summary of the invention

The problems referred to above being prior art and existing to be solved in the utility model, it is desirable to provide a kind of be applicable to Industrial Boiler there is steady combustion, efficient and ultralow NOxCoal burner is put at the end of discharge.

For solve the problems referred to above, this utility model by the following technical solutions: a kind of ultralow NOxCoal burner, including the outer airduct of airduct in secondary air box, electric adjustable air door, the primary air piping being coaxially disposed, secondary and secondary, described primary air piping is arranged at axle center, central canal it is provided with in it, light car oil rifle and ignitor it is provided with in described central canal, described light car oil rifle connects an oil pump, and described ignitor connects ignition transformer, it is characterised in that be provided with inner second air room and outer second air room in described secondary air box;Inner second air road UNICOM between airduct in described one end, inner second air room and described primary air piping and secondary, the other end is provided with the first backflow air port and inner second air mouth;Outer second air road UNICOM between the outer airduct of airduct and secondary in described one end, outer second air room and described secondary, the other end is provided with the second backflow air port and outer second air mouth;It is provided with inner second air cyclone in described inner second air road;It is provided with outer second air cyclone in described outer second air road;Described electric adjustable air door includes the first backflow wind air register, the second backflow wind air register, inner second air air register and the outer second air air register being arranged on corresponding air port.

Compared with prior art, this utility model has the advantage that

1, secondary air box is separated into inside and outside air compartment by this utility model, form double air channel, realize classification and send the hypoxia wind of variable concentrations, reduce the oxygen concentration of combustion zone and the peak temperature of flame as far as possible, make the oxygen debt burning of coal dust, making combustion zone environment be in reducing atmosphere, flame root forms anoxia fuel-rich regions, is effectively reduced NOxGeneration, it is achieved low NOxDischarge, meets environmental requirement.

2, backflow wind and secondary wind are respectively fed in inside and outside secondary air duct by this utility model by rational proportioning, due to backflow wind be the flue gas that produced by boiler through the cooling of high/low temperature air preheater and by purifier dedusting after reclaim and obtain, its oxygen content is more much lower than air, thus coal dust can be made further to enter after burner hearth oxygen debt burning in various degree, reduce NOxGeneration, it is achieved ultralow nitrogen requirement.

3, backflow wind and secondary wind are respectively fed in inside and outside secondary air duct by this utility model by rational proportioning, with burner centre as the center of circle, in the way of concentric circular expands step by step, wind and the mixed proportion of secondary wind thus regulation layer by layer refluxes, reach the oxygen debt burning of the different degree of flame regional, reduce the generation of NOx further, it is achieved ultralow nitrogen requirement.

As improvement of the present utility model, the blade of the tilt adjustable of one group of annular setting is had in described inner second air cyclone, described inner second air pipe is provided with and the inclined-plane of described inner second air cyclone relative configuration, and described inner second air cyclone carries out eddy flow regulation by pull bar.Regulate cyclone position in inner second air road by pull bar, make blade contact with the diverse location on the inclined-plane of inner second air pipe, thus regulate the angle of inclination of blade, make the air-flow passed through produce the eddy flow of varying strength.Eddy flow is conducive to producing recirculating zone, and volume is inhaled the quick ignition of high-temperature flue gas, beneficially Pulverized Coal, can be realized the rapid starting/stopping of boiler.

As further improvement of the utility model, the blade of the tilt adjustable of one group of annular setting is had in described outer second air cyclone, described outer second air pipe is provided with and the inclined-plane of described outer second air cyclone relative configuration, and described outer second air cyclone carries out eddy flow regulation by pull bar.By the position in pull bar regulation cyclone secondary air duct outside, make blade contact with the diverse location on the inclined-plane of outer second air pipe, thus regulate the angle of inclination of blade, make the air-flow passed through produce the eddy flow of varying strength.Eddy flow is conducive to producing recirculating zone, and volume is inhaled the quick ignition of high-temperature flue gas, beneficially Pulverized Coal, can be realized the rapid starting/stopping of boiler.

Owing to First air and inner second air all use eddy flow, and carry out eddy flow regulation by pull bar, burner hearth size can be adapted to according to the length and width of furnace width and length reasonable adjusting flame, more efficiently prevent from the generation of coking.

Further improving as of the present utility model, the shaft design outside the air inlet of described primary air piping becomes cyclone cylinder structure, makes wind powder be sufficiently mixed rear eddy flow and enters burner hearth.Owing to cyclone cylinder is to be formed by the body of primary air piping self, it is not necessary to external parts so that this utility model structure is the compactest.

Further improving as of the present utility model, the outlet of described primary air piping is provided with annular stabilizer.Described annular stabilizer, with expanding angle, can eliminate rotary gas or radial distribution that breeze airflow produces because of centrifugal force is uneven, cause First air air-flow to have greatly at burner outlet and spread and rotates, and formation smoke backflow makes burning more stable.

Accompanying drawing explanation

The utility model is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings.

Fig. 1 is a kind of ultralow NO of this utility modelxThe structural representation of coal burner.

Fig. 2 is that the A-A of Fig. 1 is to sectional view.

Fig. 3 is that the B-B of Fig. 1 is to sectional view.

Fig. 4 is that the C-C of Fig. 1 is to sectional view.

Fig. 5 is that the D-D of Fig. 1 is to sectional view.

Fig. 6 is that the E-E of Fig. 1 is to sectional view.

Detailed description of the invention

Reference 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the ultralow NO of one of the present utility modelxCoal burner, including the outer airduct 12 of airduct 13 in secondary air box 8, electric adjustable air door 7, the primary air piping 4 being coaxially disposed, secondary and secondary, described primary air piping 4 is arranged at axle center, central canal 3 it is provided with in it, light car oil rifle 15 and ignitor 2 it is provided with in described central canal 3, described light car oil rifle 15 connects an oil pump 21, and described ignitor 2 connects ignition transformer 1, it is characterised in that be provided with inner second air room 6 and outer second air room 9 in described secondary air box 8;Inner second air road 17 UNICOM between airduct 13 in described one end, inner second air room 6 and described primary air piping 4 and secondary, the other end is provided with the first backflow air port 24 and inner second air mouth 23;Outer second air road 11 UNICOM between the outer airduct 12 of airduct 13 and secondary in described one end, outer second air room 9 and described secondary, the other end is provided with the second backflow air port 25 and outer second air mouth 26;It is provided with inner second air cyclone 18 in described inner second air road 17;It is provided with outer second air cyclone 10 in described outer second air road 11;Described electric adjustable air door 7 includes first backflow wind air register the 702, second backflow wind air register 703, inner second air air register 701 and the outer second air air register 704 being arranged on corresponding air port.

The blade of the tilt adjustable of one group of annular setting is had in described inner second air cyclone 18, described inner second air pipe 13 is provided with and the inclined-plane 19 of described inner second air cyclone 18 relative configuration, and described inner second air cyclone 18 carries out eddy flow regulation by pull bar 20.

The blade of the tilt adjustable of one group of annular setting is had in described outer second air cyclone 10, described outer second air pipe 12 is provided with and the inclined-plane 16 of described outer second air cyclone 10 relative configuration, and described outer second air cyclone 10 carries out eddy flow regulation by pull bar 5.

The outlet of described primary air piping 4 is provided with annular stabilizer 14.Described annular stabilizer 14 is with expanding angle.

With reference to Fig. 6, the shaft design outside the air inlet of described primary air piping 4 becomes cyclone cylinder 22 structure.

Work process of the present utility model is as follows:

First turning on boiler induced-draft fan and aerator pre-purges, regulation blower fan is to the combustion chamber draft required.Start oil pump 21 and ignition transformer 1, make fuel oil spray through the oil nozzle of oil gun 15, and lighted by ignitor 2.When starting oil pump 21 and ignition transformer 1, oil gun 15 and ignitor 2 stretch out automatically from central canal.After fuel oil is ignited 10 seconds, starting pulverized coal conveying device (not shown in figure 1), coal dust is gone out ejection through primary air piping 4 at stabilizer 14 by cyclone cylinder 22 under the transport of First air, and by fuel oil flame ignition.

It is mixed to form inner second air from the inner second air mouth 23 of bellows 8 and the secondary wind in the first backflow air port 24 with backflow wind entrance inner second air room 6 simultaneously, enters inner second air road 17, produce rotation by inner second air cyclone 18;It is mixed to form outer second air from the outer second air mouth 26 of bellows 8 and the secondary wind in the second backflow air port 25 with backflow wind entrance outer second air room 9, enters outer second air road 11, produce rotation by outer second air cyclone 10.

Coal dust be ignited with fuel oil cofiring 10 to 30 seconds after, close torch oil gun, burnt by coal dust completely.Oil gun and ignitor automatically fall back in central canal, prevent from being burned.Corresponding air port is individually adjusted by interior outer second air by first backflow wind air register the 702, second backflow wind air register 703, inner second air air register 701 and outer second air air register 704, secondary wind and backflow wind is made to carry out rational proportion, and be layered oxygen debt burning, so that coal dust realizes the burning completely of Pulverized Coal.

It is understood that above-described embodiment is simply to explanation of the present utility model rather than to restriction of the present utility model, any without departing from the utility model creation in this utility model spirit, within each falling within protection domain of the present utility model.

Claims (6)

1. a ultralow NOxCoal burner, including secondary air box (8), electric adjustable air door (7), the primary air piping (4) being coaxially disposed, airduct (13) and the outer airduct (12) of secondary in secondary, described primary air piping (4) is arranged at axle center, central canal (3) it is provided with in it, light car oil rifle (15) and ignitor (2) it is provided with in described central canal (3), described light car oil rifle (15) connects an oil pump (21), described ignitor (2) connects ignition transformer (1), inner second air room (6) and outer second air room (9) it are provided with in it is characterized in that described secondary air box (8);Inner second air road (17) UNICOM between airduct (13) in described (6) one end, inner second air room and described primary air piping (4) and secondary, the other end is provided with the first backflow air port (24) and inner second air mouth (23);Outer second air road (11) UNICOM between the outer airduct (12) of airduct (13) and secondary in described (9) one end, outer second air room and described secondary, the other end is provided with the second backflow air port (25) and outer second air mouth (26);It is provided with inner second air cyclone (18) in described inner second air road (17);It is provided with outer second air cyclone (10) in described outer second air road (11);Described electric adjustable air door (7) includes the first backflow wind air register (702), the second backflow wind air register (703), inner second air air register (701) and the outer second air air register (704) being arranged on corresponding air port.
A kind of ultralow NO the most as claimed in claim 1xCoal burner, the blade of the tilt adjustable of one group of annular setting is had in it is characterized in that described inner second air cyclone (18), described inner second air pipe (13) is provided with the inclined-plane (19) being oppositely disposed with described inner second air cyclone (18), and described inner second air cyclone (18) carries out eddy flow regulation by pull bar (20).
A kind of ultralow NO the most as claimed in claim 1xCoal burner, the blade of the tilt adjustable of one group of annular setting is had in it is characterized in that described outer second air cyclone (10), described outer second air pipe (12) is provided with the inclined-plane (16) being oppositely disposed with described outer second air cyclone (10), and described outer second air cyclone (10) carries out eddy flow regulation by pull bar (5).
A kind of ultralow NO the most as claimed in claim 1xCoal burner, it is characterised in that the shaft design outside the air inlet of described primary air piping (4) becomes cyclone cylinder (22) structure.
5. the ultralow NO of one as described in claim 1-4 any onexCoal burner, it is characterised in that the outlet of described primary air piping (4) is provided with annular stabilizer (14).
A kind of ultralow NO the most as claimed in claim 5xCoal burner, it is characterised in that described annular stabilizer (14) is with expanding angle.
CN201521095354.5U 2015-12-23 2015-12-23 Ultralow NOx coal burner CN205579553U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521095354.5U CN205579553U (en) 2015-12-23 2015-12-23 Ultralow NOx coal burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521095354.5U CN205579553U (en) 2015-12-23 2015-12-23 Ultralow NOx coal burner

Publications (1)

Publication Number Publication Date
CN205579553U true CN205579553U (en) 2016-09-14

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ID=56882760

Family Applications (1)

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CN201521095354.5U CN205579553U (en) 2015-12-23 2015-12-23 Ultralow NOx coal burner

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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

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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CP01 Change in the name or title of a patent holder

Address after: Hangzhou City, Zhejiang province 311115 Fengdu Pingyao Town, Yuhang District Industrial Zone Road, Yangcheng Road No. 1

Patentee after: Hangzhou environmental protection Polytron Technologies Inc

Address before: Hangzhou City, Zhejiang province 311115 Fengdu Pingyao Town, Yuhang District Industrial Zone Road, Yangcheng Road No. 1

Patentee before: Hangzhou Juneng Boiler Co., Ltd.

CP01 Change in the name or title of a patent holder