CN106196041A - Multiple stage separation annular return formula axial rotational flow burner - Google Patents
Multiple stage separation annular return formula axial rotational flow burner Download PDFInfo
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- CN106196041A CN106196041A CN201610521284.8A CN201610521284A CN106196041A CN 106196041 A CN106196041 A CN 106196041A CN 201610521284 A CN201610521284 A CN 201610521284A CN 106196041 A CN106196041 A CN 106196041A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
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- Combustion & Propulsion (AREA)
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Abstract
A kind of multiple stage separation annular return formula axial rotational flow burner.Existing turbulent burner technology needs to reduce NOx emission further, improve burn-off rate.Primary air piping elbow (1) of the present invention is connected with primary air piping horizontal segment (2), there is central air hose assembly (5) at primary air piping horizontal segment center, entrance has coal dust uniform device (3), nearly outlet has venturi pulverized coal concentrator (4), outlet is connected with stabilizer (7), secondary air channel (10) and secondary wind air lock (13) is had outside primary air piping horizontal segment, tertiary-air pipe (11) and tertiary air air lock (14) is had outside secondary air channel, tertiary-air pipe outlet has tertiary air enlarging (17), tertiary air is provided with tertiary air eddy flow governor motion (15), four airducts (12) are had outside tertiary-air pipe, four times wind is provided with four wind eddy flow governor motion (16), four times wind tube outlet is connected with panelized-tube-wall section (18).The present invention is used for multiple stage separation annular return formula axial rotational flow burner.
Description
Technical field:
The present invention relates to the high-efficiency cleaning field of combustion technology of coal, specifically provide a kind of multiple stage separation annular return formula axially to revolve
Stream burner.
Background technology:
Existing wall face-fired boiler turbulent burner technology is the most different, for dry nothing according to ature of coal its NOx emission different
Ash base volatilization is divided into the bituminous coal of 36-38%, the accessible NOx emission of prior art substantially 240-280mg/Nm3(6% O2, does
Flue gas), dry ash free basis volatilization is divided into the meager coal of 19%, prior art can reach 450mg/Nm3(6% O2, dry flue gas),
These concentration are much higher than at present as little as 50mg/Nm3(6% O2, dry flue gas) up-to-date emission regulation, therefore, necessary enter
One step is improved burner design, is improved burner performance to reduce denitrating flue gas expense to greatest extent to meet up-to-date discharge
Regulation.
The NOx produced in coal combustion process is mainly made up of heating power NOx and fuel NO_x two parts: heating power NOx is by burning
An oxidized generation of small part nitrogen in air, accounts for the 20-30% of total NOx；Fuel NO_x is oxidized by a part of nitrogen in coal
Generate, account for the 70-80% of total NOx, coal fire discharged NOx except forming acid rain, destroy outside ecological environment, also can form photochemistry
Smog, directly endangers human health, it is therefore necessary to be effectively controlled.
Power station fire coal is one of main source of NOx emission in air, and the control of coal burning boiler of power station NOx emission can be by firing
After controlling during burning and burning, fume treatment realizes, and controls in combustion process mainly by using low-NOx combustor
Complete plus sectional combustion technology in stove, increasingly strict, to combustion process along with to power station pollution that caused by coal burning thing emission control
The control that middle NOx generates also has higher requirement.
Summary of the invention:
It is an object of the invention to provide a kind of multiple stage separation annular return formula axial rotational flow burner.
Above-mentioned purpose is realized by following technical scheme:
A kind of multiple stage separation annular return formula axial rotational flow burner, its composition includes: primary wind and powder system, total secondary wind system
System, described primary wind and powder system includes primary air piping elbow, and described primary air piping elbow is by flange and primary air piping water
Flat section connects, and the described primary air piping horizontal segment port of export is by the bolt of particular design and dentation more than and with little enlarging
Stabilizer connect, secondary air channel is installed outside described primary air piping horizontal segment, is provided with outside described secondary air channel
Tertiary-air pipe, the described tertiary-air pipe port of export be provided with one with axially have the tertiary air enlarging of certain angle, this enlarging is passed through
Welding manner and reinforcing plate are connected with described tertiary-air pipe, are provided with four airducts outside described tertiary-air pipe, described
Primary air piping horizontal segment and secondary air channel, described secondary air channel and tertiary-air pipe, described tertiary-air pipe and four airducts it
Between be all supported by the holding device of particular design in front and back end, four times described wind tube outlet ends are provided with water screen tube
Screen.
Described multiple stage separation annular return formula axial rotational flow burner, described primary air piping horizontal segment arrival end top
Being provided with a crescent coal dust uniform device, the described nearly port of export of primary air piping horizontal segment is provided with venturi Pulverized Coal Concentration
Device, described primary air piping horizontal segment center is provided with central air hose assembly, and described central air hose module outlet end leads to
Crossing support to be connected with described primary air piping horizontal segment, arrival end is connected with described primary air piping elbow by the face flange that inclines,
Described central air hose assembly center is provided with oil gun assembly, and described oil gun module outlet end is supported on institute by impeller
In the central air hose assembly stated, arrival end is connected with described central air hose module inlet end by flange.
Described multiple stage separation annular return formula axial rotational flow burner, described total secondary air system includes bellows, institute
The bellows stated are connected, outside described bellows with described primary air piping horizontal segment and described four airducts with welding manner
Being provided with total air lock assembly, described total air lock assembly is a coaxial cylinders being positioned at outside bellows, by its pulley, guide rail
And cylinder lever connecting rod can axially move to adjust its throttle opening, the nearly port of export of described tertiary-air pipe is disposed with tertiary air eddy flow
Governor motion, this governor motion is to install one group of axial rotational flow blade being equally spaced on the circumference of tertiary-air pipe passage,
Each blade is connected with a ring flat-plate being arranged on outside four airducts by its positioning rotating shaft and drive link, described four times
The nearly port of export of airduct is disposed with four wind eddy flow governor motions, and this governor motion is to install one on the circumference of four airduct passages
The axial rotational flow blade that group is equally spaced, each blade is arranged on four wind by its positioning rotating shaft and drive link with one
Ring flat-plate outside pipe connects, and namely tertiary air and four wind swirl vanes are respectively connected with a ring flat-plate, and the two ring flat-plate is respectively
Can axially move to adjust blade by its pulley, guide rail and cylinder lever connecting rod and with axial angle thus adjust its swirl strength,
Described secondary air channel, described tertiary-air pipe porch are separately installed with the secondary wind air lock of taper, tertiary air air lock with control
Making its air quantity, the two taper air lock is also to can axially move to adjust its throttle opening by its pulley and cylinder lever connecting rod.
Beneficial effect:
Low NOx cyclone burner the most of the present invention through 18MW cold conditions and hot test, numerical simulation calculation, test burn device to reality
Border burner Enlargement Design, has been applied successfully to multiple power stations bituminous coal engineering project, and result of field running shows for being dried
Ash free basis volatilization is divided into the bituminous coal of 36%, and boiler export NOx emission can be reduced to 220mg/Nm3(6% O2 by burner of the present invention)
Hereinafter, minimum up to below 200mg/Nm3, uncompleted burned carbon low level heat loss is below 0.5%.
Burner of the present invention also has relatively low running resistance, and First air resistance is less than 800Pa, and total secondary wind resistance does not surpasses
Crossing 1300Pa, this burner can keep good combustion stability under all loads, does not produce spout coking.
The present invention low NOx axial rotational flow burner has the separation of primary wind and powder multi-stage bias, main combustion air deep-graded
With form the feature such as toroidal recirculation pattern, the generation of NOx can be reduced to greatest extent.
The First air of burner of the present invention carries coal dust and enters primary air piping horizontal segment through primary air piping elbow, once
Airduct horizontal segment arrival end top is disposed with a meniscate coal dust uniform device, to adjust in primary air piping elbow due to air-flow
Change flow direction and Particle Inertia effect and cause upper dense under light uneven coal dust distribution, primary wind and powder is through coal dust
Substantially tend to after uniform device being uniformly distributed, then after venturi pulverized coal concentrator, primary air piping Outlet Section produces
Dense interior light concentration distribution outside, and burner hearth is injected herein.
The main combustion air that burner of the present invention is come by bellows is divided into secondary wind, tertiary air and four wind, with increase air
Classification degree, secondary wind is direct current, and air quantity is less, and its effect is to form one air partition wall to postpone First air and the main combustion in periphery
Burning air mixes, and namely forms anaerobic environment in nearly burner region, and beneficially NOx reduces, and tertiary air and four wind are eddy flow,
Wind speed is relatively big, injects burner hearth respectively through after one group of circumferentially disposed axial rotational flow blade, and its effect is in remote burning
Device district completes the burning of uncompleted burned carbon, and promotes to be formed a recirculating zone in nearly burner region.
The present invention is provided with dentation more than the stabilizer with little enlarging at the primary air piping port of export, and many toothings are one
Create coal powder light-dark on the circumferencial direction of secondary wind tube outlet end to separate, produce local reduction environment, decrease the generation of NOx,
Little enlarging is postponed secondary wind and is mixed with primary wind and powder, forms anaerobic environment further in nearly burner region, and beneficially NOx reduces.
The present invention be provided with in tertiary-air pipe exit one with axially have the enlarging of certain angle, to postpone tertiary air and four
The mixing of secondary wind.
The distinctive spout structure of low-NOx combustor of the present invention forms a ring outside the primary wind and powder jet of nearly burner region
Shape recirculating zone, this toroidal recirculation pattern can be by outer dense interior light primary wind and powder volume seat to recirculating zone；High-temperature flue gas is taken back closely
Burner region, heats primary wind and powder, promotes pulverized coal ignition, keeps flame holding；The high-temperature flue gas oxygen content taken back is low, makes
Recirculating zone is in anaerobic environment, and beneficially NOx reduces.
Burner secondary wind of the present invention is gradually deviated from First air and fuel from inside to outside to four wind, thus causes axially
Upper stepped mixing and fractional combustion, this classification two kinds of effects of generation: first, form anaerobic environment in nearly burner region, favorably
Reduce in NOx, completed the burning of uncompleted burned carbon in remote burner region by three, four wind；Second, heat progressively discharges, from
And reduce flame temperature, reduce heating power NOx and generate.
10. the present invention have optimization one to four wind wind speed, eddy flow degree and air flow rate proportioning and optimize primary wind and powder multistage
Light-dark separation device geometry.
Present invention employs direct current First air and simple First air inlet bend to reduce First air resistance, to reduce blower fan
Energy consumption, and simplify structure, reduce cost, the axial rotational flow mechanism of the present invention has that simple in construction, resistance be little, eddy flow degree is adjusted
The advantages such as whole scope is big.
Accompanying drawing illustrates:
Accompanying drawing 1 is the structural representation of the present invention.
Accompanying drawing 2 is the coal dust uniform device structural representation in accompanying drawing 1.
Accompanying drawing 3 is 100mm cross section coal powder density distribution values simulation drawing before the primary air piping outlet in accompanying drawing 1.
Accompanying drawing 4 is the primary air piping outlet coal powder density distribution values simulation drawing in accompanying drawing 1.
Accompanying drawing 5 is 20mm cross section coal powder density distribution values simulation drawing after the primary air piping outlet in accompanying drawing 1.
Accompanying drawing 6 is the primary air piping outlet Pulverized Coal Concentration ribbon simulation test figure in accompanying drawing 1.
Accompanying drawing 7 is the many dentations stabilizer structural representation in accompanying drawing 1.
Accompanying drawing 8 is multiple stage separation annular return formula axial rotational flow burner flow field structure cold test figure.
Accompanying drawing 9 is multiple stage separation annular return formula axial rotational flow burner flow field structure numerical simulation figure.
Accompanying drawing 10 is the tertiary air eddy flow governor motion in accompanying drawing 1, four wind eddy flow governor motion schematic diagrams.
Detailed description of the invention:
Embodiment 1:
A kind of multiple stage separation annular return formula axial rotational flow burner, its composition includes: primary wind and powder system, total secondary wind system
System, described primary wind and powder system includes primary air piping elbow 1, and described primary air piping elbow is by flange and primary air piping water
Flat section 2 connects, and the described primary air piping horizontal segment port of export is by the bolt of particular design and dentation more than and with little expansion
The stabilizer 7 of mouth connects, and is provided with secondary air channel 10 outside described primary air piping horizontal segment, the outside peace of described secondary air channel
Equipped with tertiary-air pipe 11, the described tertiary-air pipe port of export be provided with one with axially have the tertiary air enlarging 17 of certain angle, this
Enlarging is connected with described tertiary-air pipe by welding manner and reinforcing plate, is provided with four airducts outside described tertiary-air pipe
12, described primary air piping horizontal segment and secondary air channel, described secondary air channel and tertiary-air pipe, described tertiary-air pipe and four
All being supported by the holding device of particular design in front and back end between secondary airduct, four times described wind tube outlet ends are provided with
Panelized-tube-wall section 18.
Embodiment 2:
According to the multiple stage separation annular return formula axial rotational flow burner described in embodiment 1, described primary air piping horizontal segment enters
Mouth end top is provided with a crescent coal dust uniform device 3, and the described nearly port of export of primary air piping horizontal segment is provided with venturi
Pulverized coal concentrator 4, described primary air piping horizontal segment center is provided with central air hose assembly 5, described central air hose group
The part port of export is connected with described primary air piping horizontal segment by support, and arrival end is by face flange and the described primary air piping of inclining
Elbow connects, and described central air hose assembly center is provided with oil gun assembly 6, and described oil gun module outlet end passes through leaf
Wheel is supported in described central air hose assembly, and arrival end is connected with described central air hose module inlet end by flange.
Embodiment 3:
According to the multiple stage separation annular return formula axial rotational flow burner described in embodiment 1 or 2, described total secondary air system bag
Including bellows 8, described bellows are connected with described primary air piping horizontal segment and described four airducts with welding manner, described
Bellows outside total air lock assembly 9 is installed, described total air lock assembly is a coaxial cylinders being positioned at outside bellows, passes through
Its pulley, guide rail and cylinder lever connecting rod can axially move to adjust its throttle opening, and the nearly port of export of described tertiary-air pipe is arranged
Having tertiary air eddy flow governor motion 15, this governor motion is to install one group on the circumference of tertiary-air pipe passage to be equally spaced
Axial rotational flow blade, each blade is connected with a ring flat-plate being arranged on outside four airducts by its positioning rotating shaft and drive link
Connecing, four times described nearly ports of export of airduct are disposed with four wind eddy flow governor motions 16, and this governor motion is to lead at four airducts
One group of axial rotational flow blade being equally spaced is installed on the circumference in road, each blade by its positioning rotating shaft and drive link with
The ring flat-plate that one is arranged on outside four airducts connects, and namely tertiary air and four wind swirl vanes are each with a ring flat-plate even
Connect, the two ring flat-plate respectively by its pulley, guide rail and cylinder lever connecting rod can axially move to adjust blade and axial angle from
And adjusting its swirl strength, described secondary air channel, described tertiary-air pipe porch are separately installed with the secondary wind wind of taper
Lock 13, tertiary air air lock 14 are to control its air quantity, and the two taper air lock is also can be vertically by its pulley and cylinder lever connecting rod
Mobile to adjust its throttle opening.
Embodiment 4:
According to the multiple stage separation annular return formula axial rotational flow burner described in embodiment 1-3, described multiple stage separation annular is returned
Streaming axial rotational flow burner is made up of primary wind and powder system and total secondary air system, and primary wind and powder system is curved by primary air piping
Head, primary air piping horizontal segment, coal dust uniform device, venturi pulverized coal concentrator, stabilizer, central air hose assembly and oil gun assembly
Composition, total secondary air system is adjusted with eddy flow by bellows, secondary air channel, tertiary-air pipe and four airducts and corresponding air quantity regulation thereof
Regulating device forms；
Center arrangement at primary air piping horizontal segment has central air hose, the center arrangement of central air hose have oil gun, oil gun rise igniting,
Radiator and the effect surely fired when underrun for burner, capacity is generally the 20-30% of burner heat input, centre wind
Pipe provides a part of combustion air for oil gun, also functions to cool down the effect of oil gun；
Primary air piping uses heat-resistant antifriction material to prevent high temperature deformation and coal dust from washing away by one section of burner hearth, and primary air piping leans on bellows
One section, venturi pulverized coal concentrator, coal dust uniform device and elbow all use wear-resistant material to prevent coal dust from washing away, i.e. at common carbon
Steel inwall is packed with wear-resistant ceramic or uses overall wear resistance castings, and central air hose and the venturi pulverized coal concentrator parts being connected are adopted
With overall wear resistance castings, primary air piping horizontal segment assembly and elbow assembly pass through Flange joint, in order to install and dismantle and protect
Demonstrate,proving its axiality, central air hose module outlet end is connected with primary air piping horizontal segment by support, and arrival end is by the face flange that inclines
It is connected with elbow, in order to installing and dismantle and ensure and the axiality of primary air piping horizontal segment, the oil gun port of export passes through impeller
Being supported in central air hose, arrival end is connected with central air hose arrival end by flange, in order to installs and dismantles and ensure
Axiality with central air hose；
Stabilizer is high-quality heat-resistant antifriction foundry goods, and to prevent high temperature deformation and coal dust from washing away, stabilizer goes out with primary air piping assembly
Mouth end is connected by the bolt of a kind of particular design, and this bolt connects the axle that can adjust stabilizer the most flexibly and exactly
To position, and make bolt be hidden in primary air piping tube wall thus prevent coal dust to wash away；
This product burner is provided with independent bellows and total air lock device to control total secondary air flow of burner, and total air lock fills
Putting is a coaxial cylinders being positioned at outside bellows, can axially move to adjust it by its pulley, guide rail and cylinder lever connecting rod
Throttle opening, is respectively provided with a taper air lock to control its air quantity at secondary air channel and tertiary-air pipe porch, the two taper
Air lock is also to can axially move to adjust its throttle opening by its pulley and cylinder lever connecting rod, and four times airduct does not has air lock, its
Air quantity depends on the air quantity of secondary wind and tertiary air；
The circumferencial direction of tertiary air and four wind passages is respectively provided with one group of axial rotational flow blade being equally spaced, often in group
Each blade be connected with a ring flat-plate being arranged on outside four airducts by its positioning rotating shaft and drive link, namely three
Secondary wind and four wind swirl vanes are respectively connected with a ring flat-plate, and the two ring flat-plate is respectively by its pulley, guide rail and cylinder lever connecting rod
Can axially move to adjust blade and with axial angle thus adjust its swirl strength, this eddy flow governor motion can realize bigger model
The blade angle enclosed and swirl strength；
Between primary air piping and secondary air channel, secondary air channel and tertiary-air pipe, tertiary-air pipe and four airducts the most logical in front and back end
The holding device crossing particular design is supported, and holding device is provided with adjusting nut to ensure the axiality between each airduct, so
Easy for installation and precision is high, tertiary air enlarging is connected with tertiary-air pipe by welding manner and reinforcing plate, improves bonding strength,
Bellows are connected with primary air piping and four airducts with welding manner, it is ensured that the integral rigidity of burner.
Claims (3)
1. a multiple stage separation annular return formula axial rotational flow burner, its composition includes: primary wind and powder system, total secondary wind system
System, is characterized in that: described primary wind and powder system includes primary air piping elbow, and described primary air piping elbow passes through flange and
Secondary airduct horizontal segment connects, and the described primary air piping horizontal segment port of export is by the bolt of particular design and dentation more than and carries
The stabilizer having little enlarging connects, and is provided with secondary air channel, outside described secondary air channel outside described primary air piping horizontal segment
Portion is provided with tertiary-air pipe, the described tertiary-air pipe port of export be provided with one with axially have the tertiary air enlarging of certain angle, this
Enlarging is connected with described tertiary-air pipe by welding manner and reinforcing plate, is provided with four wind outside described tertiary-air pipe
Pipe, described primary air piping horizontal segment and secondary air channel, described secondary air channel and tertiary-air pipe, described tertiary-air pipe and four
All being supported by the holding device of particular design in front and back end between secondary airduct, four times described wind tube outlet ends are provided with
Panelized-tube-wall section.
Multiple stage separation annular return formula axial rotational flow burner the most according to claim 1, is characterized in that: described once
Airduct horizontal segment arrival end top is provided with a crescent coal dust uniform device, described primary air piping horizontal segment nearly port of export peace
Equipped with venturi pulverized coal concentrator, described primary air piping horizontal segment center is provided with central air hose assembly, described in
Heart-wind syndrome pipe module outlet end is connected with described primary air piping horizontal segment by support, and arrival end is by inclining face flange and described
Primary air piping elbow connects, and described central air hose assembly center is provided with oil gun assembly, described oil gun module outlet
End is supported in described central air hose assembly by impeller, and arrival end is by flange and described central air hose module inlet end
It is connected.
Multiple stage separation annular return formula axial rotational flow burner the most according to claim 1 and 2, is characterized in that: described
Total secondary air system includes bellows, and described bellows are with welding manner and described primary air piping horizontal segment and described four wind
Pipe is connected, and is provided with total air lock assembly outside described bellows, and described total air lock assembly is one and is positioned at outside bellows
Coaxial cylinders, can axially move to adjust its throttle opening, described tertiary-air pipe by its pulley, guide rail and cylinder lever connecting rod
The nearly port of export is disposed with tertiary air eddy flow governor motion, and this governor motion is to install one group etc. on the circumference of tertiary-air pipe passage
The axial rotational flow blade that spacing is arranged, each blade is arranged on outside four airducts with one by its positioning rotating shaft and drive link
The ring flat-plate of side connects, and four times described nearly ports of export of airduct are disposed with four wind eddy flow governor motions, and this governor motion is four
Installing one group of axial rotational flow blade being equally spaced on the circumference of secondary airduct passage, each blade is by its positioning rotating shaft and drives
Dynamic connecting rod connects with a ring flat-plate being arranged on outside four airducts, namely tertiary air and four wind swirl vanes are each and
Ring flat-plate connects, and the two ring flat-plate can axially move to adjust blade with axial by its pulley, guide rail and cylinder lever connecting rod respectively
Angle thus adjust its swirl strength, described secondary air channel, described tertiary-air pipe porch are separately installed with the two of taper
Secondary wind air lock, tertiary air air lock are to control its air quantity, and the two taper air lock is also can be along axle by its pulley and cylinder lever connecting rod
To mobile to adjust its throttle opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610521284.8A CN106196041A (en) | 2016-07-05 | 2016-07-05 | Multiple stage separation annular return formula axial rotational flow burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610521284.8A CN106196041A (en) | 2016-07-05 | 2016-07-05 | Multiple stage separation annular return formula axial rotational flow burner |
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| Publication Number | Publication Date |
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| CN106196041A true CN106196041A (en) | 2016-12-07 |
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ID=57464748
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| CN201610521284.8A Pending CN106196041A (en) | 2016-07-05 | 2016-07-05 | Multiple stage separation annular return formula axial rotational flow burner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108302524A (en) * | 2017-12-27 | 2018-07-20 | 唐山博全实业有限公司 | A kind of coal burner and application method |
| CN111895393A (en) * | 2020-08-12 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Central enriched fuel intensified firing direct-current low-nitrogen combustor capable of deeply peak-shaving |
| JP2021173505A (en) * | 2020-04-30 | 2021-11-01 | 株式会社Ihi | Powder fuel burner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108302524A (en) * | 2017-12-27 | 2018-07-20 | 唐山博全实业有限公司 | A kind of coal burner and application method |
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| CN111895393A (en) * | 2020-08-12 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Central enriched fuel intensified firing direct-current low-nitrogen combustor capable of deeply peak-shaving |
| CN111895393B (en) * | 2020-08-12 | 2023-03-31 | 哈尔滨锅炉厂有限责任公司 | Center enriched fuel intensified ignition direct-current low-nitrogen combustor capable of deeply regulating peak |
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Application publication date: 20161207 |