CN206682926U - Five-channel coal-powder combustor - Google Patents
Five-channel coal-powder combustor Download PDFInfo
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- CN206682926U CN206682926U CN201720397578.4U CN201720397578U CN206682926U CN 206682926 U CN206682926 U CN 206682926U CN 201720397578 U CN201720397578 U CN 201720397578U CN 206682926 U CN206682926 U CN 206682926U
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- flange
- coal
- airduct
- wind
- balance
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Abstract
The utility model discloses a kind of Five-channel coal-powder combustor, belongs to Five-channel coal-powder combustor field, it is desirable to provide a kind of Five-channel coal-powder combustor, it can reduce the growing amount of NOx in Five-channel coal-powder combustor.Its drip irrigation device is：A kind of Five-channel coal-powder combustor, including central air hose, eddy flow airduct, coal airduct and the outer shaft stream airduct being coaxially disposed, the outer coaxial sleeve of the outer shaft stream airduct is provided with balance wind pipe, one end of the balance wind pipe, which extends internally, is provided with flange one, the inwall of flange one along balance wind pipe it is axially arranged to have section be semicircular balance air holes, and the balance air holes circumference array is arranged on the inwall of flange one.
Description
Technical field
A kind of Five-channel coal-powder combustor is the utility model is related to, more particularly to a kind of Five-channel coal-powder combustor.
Background technology
Nitrogen oxides (NOx) is the primary pollution source for causing atmosphere pollution, and coal burning is one of NOx main source,
In order to which NOx pollutes with controlling getting worse, State Bureau of Environmental Protection promulgated on March 7th, 1996《Thermal power plant atmosphere pollution row
Put standard》(GB13223-26), clear stipulaties 300MW and above unit dry-bottom pulverized coal furnace NOx discharge be not in standard
650mg/m must be exceeded3If not taking low NOx drainage measure, it is difficult to meet NOx emission request.September performs on the 1st within 2000
's《The Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution》It it is also proposed the requirement administered to NOx emission.NOx controls mainly have two kinds
Approach, first, NOx generation is reduced using low NO technology, second, removing NOx from flue gas.In the current warp in China
Under Ji is horizontal, the former is more effective, economically viable method；The subject matter of the latter is to invest too high, is not suitable for China
National conditions.Turbulent burner occupies certain ratio in China's station boiler and other coal dust application fields.Using swirl flow combustion
The large coal powder boiler of device has the advantages of its is unique：First choice can avoid using mistake caused by DC burner corner tangential firing
The thermal deviation in Re Qi areas；Next to that there is no strict requirements to burner hearth shape, it is not necessary to which certain close to square, this gives afterbody convection current
The arrangement of heating surface brings great convenience.Turbulent burner, as stable thermal source, makes coal dust gas by high temperature recirculation zone
Stream in time stable burning of fighting, common turbulent burner primary and secondary air mixing is strong, and temperature peak is high, and NOx generation amount is big.
As China's unit increasingly develops to Large Copacity, the development to spiral-flow powdered coal burning technology proposes urgent requirement.Therefore, grind
It is all to have highly important meaning to China's power industry and the development of whole national economy to study carefully low NOx cyclone pulverized coal combustion
Justice.
Utility model content
The purpose of this utility model is to provide a kind of Five-channel coal-powder combustor, and it can reduce Five-channel coal-powder combustor
Middle NOx growing amount.
Above-mentioned technical purpose of the present utility model technical scheme is that：
A kind of Five-channel coal-powder combustor, including central air hose, eddy flow airduct, coal airduct and the outer shaft stream wind being coaxially disposed
Pipe, the outer coaxial sleeve of the outer shaft stream airduct are provided with balance wind pipe, and one end of the balance wind pipe, which extends internally, is provided with flange one,
The inwall of flange one along balance wind pipe it is axially arranged to have section be semicircular balance air holes, and the balance air holes circumference
Array is arranged on the inwall of flange one.
By such scheme, central air hose, eddy flow airduct and outer shaft stream airduct inside and outside coal airduct still use a typhoon
Machine air feed, increase a centrifugal blower and be used to balance airduct offer balance wind, be the principle based on coal injection pipe high speed difference, strengthen
Coal injection pipe multistage air feed effect；So as to effectively reduce pernicious gas, and head coking is prevented, extend the use of coal powder injection tube head
Life-span；And play the role of the normal operation of three big main channels in firm, reduce maintenance cost.The setting of flange one to balance
Airduct end narrows, and when balancing wind into when balancing in air holes, wind speed improves, and strengthens its stirring effect to coal dust.
Balancing air channel simultaneously can effectively prevent the head of burner from wearing and keep the flame of definite shape, prevent office
The phenomenon of portion's high temperature scaling loss kliner coating.For the burner of this structural shape because passage wind speed is higher, the thrust of burner is big, can meet
The abundant after-flame of various fuel, the utilization to raising colm are highly beneficial.Simultaneously because once net air quantity is low, First air（Contain
Coal wind and net wind）Ratio only has 8.6%, can accordingly reduce the growing amount of NOx in Five-channel coal-powder combustor.
Further, the outer shaft stream airduct end is provided with flange two at outer shaft stream air channel two laterally, described
Space is left between flange two and flange one.
By such scheme, poured in balance wind into space from entering to balance in air holes, in outer shaft stream airduct profile cyclization
Stream, improve the mixed effect of air and coal dust.
Further, the length of flange two is less than the length of flange one, and the flange one and flange two are in pipeline
The one end in portion is respectively arranged with inclined-plane one and inclined-plane two.
By such scheme, the wind direction for balancing wind changes at inclined-plane one and inclined-plane two respectively, so that flat entering
Vortex is formed when in the air holes that weighs, the vortex wind of blowout has the effect of breaing up to coal dust, can more burn completely.
Further, the balance air holes inwall is provided with some flights along its axial array.
By such scheme, flight can improve the size of the vortex wind blown out out of balance air holes.
Further, the balance air holes outer face is provided with chamfering.
By such scheme, chamfering is used to reduce resistance of the end face to balancing wind.
Further, the balance wind pipe outer wall is provided with fire resisting mud layer.
By such scheme, fire resisting mud layer has protective effect to pipe fitting, reduces damage of the high temperature to pipe fitting.
Further, the one end of the outer shaft stream airduct with flange two is inwardly horizontal-extending is provided with boss, described convex
Platform interior edge outer shaft stream airduct axial direction array is provided with some outer shaft stream wind exhaust vents.
By such scheme, outer shaft stream wind exhaust vent is used to blow out outer shaft stream wind.
Further, the central air hose end set has the centre wind nozzle of ring-type, and the centre wind inner coaxial tube is set
It is equipped with spray bar, the circumferential uniform some centre wind exhaust vents of the centre wind nozzle face.
By such scheme, centre wind exhaust vent is used to blow out centre wind, for supplementing the air in the middle part of pipeline.
Further, it is provided with air storing cavity on the left of the centre wind exhaust vent.
By such scheme, air storing cavity is used for gas storage, so that the wind energy of center air holes is enough more balanced.
Further, the centre wind nozzle fixed sleeves are provided with guide ring, the circumferential uniform some spirals of guide ring outer wall
Guiding gutter.
By such scheme, spiral stream guidance groove is used to blow out spiral wind, and it is directly contacted with coal dust, accelerates the expansion of coal dust
Dissipate.Guide ring is detachable, so as to obtain different Whirl deposite tanks.
In summary, the utility model has the advantages that：
1st, the central air hose inside and outside coal airduct, eddy flow airduct and outer shaft stream airduct still use a Fans air feed, increase
One centrifugal blower is used to balance airduct offer balance wind, is the principle based on coal injection pipe high speed difference, it is more to enhance coal injection pipe
Level air feed effect；So as to effectively reduce pernicious gas, and head coking is prevented, extend coal powder injection tube head service life；And have
The effect of the normal operation of three big main channels, reduces maintenance cost in firm.The setting of flange one causes balance wind pipe end
Narrow, when balancing wind into when balancing in air holes, wind speed improves, and strengthens its stirring effect to coal dust；
2 at the same balance air channel can effectively prevent burner head wear and keep definite shape flame, prevent
The phenomenon of localized hyperthermia's scaling loss kliner coating.For the burner of this structural shape because passage wind speed is higher, the thrust of burner is big, can expire
The abundant after-flame of the various fuel of foot, the utilization to raising colm are highly beneficial.Simultaneously because once net air quantity is low, First air
（Wind containing coal and net wind）Ratio only has 8.6%, can accordingly reduce system NOx growing amount.
Brief description of the drawings
Fig. 1 is that embodiment is used to embody its integrally-built schematic diagram；
Fig. 2 is that embodiment is used to embody its schematic diagram with kiln connection end internal structure；
Fig. 3 is the enlarged drawing at A in Fig. 2；
Fig. 4 is the enlarged drawing at B in Fig. 3；
Fig. 5 is the schematic diagram that embodiment is used to embody nozzle face structure.
In figure, 1, spray bar；2nd, central air hose；3rd, eddy flow airduct；4th, coal airduct；5th, outer shaft stream airduct；51st, flange two；
511st, inclined-plane two；52nd, space；6th, balance wind pipe；61st, flange one；611st, inclined-plane one；62nd, air holes is balanced；621st, chamfering；63rd, spiral shell
Blade；601st, center air channel；602nd, swirl air duct；603rd, coal air channel；604th, outer shaft stream air channel；605th, air channel is balanced；606th, prop up
Bracer；7th, centre wind nozzle；701st, centre wind exhaust vent；702nd, air storing cavity；703rd, outer shaft stream wind exhaust vent；8th, guide ring；
801st, spiral stream guidance groove；9th, boss；10th, wind-guiding post；11st, outer shaft stream wind air intake conduit；12nd, Whirl deposite tank air intake conduit；13rd, center
Wind air intake conduit；14th, coal wind conduit；15th, wind air induction conduit is balanced；16th, anchoring piece；17th, fire resisting mud layer；18th, telescopic joint；19、
Fuel injector；20th, overhead crane support；21st, reinforcement.
Embodiment
A kind of Five-channel coal-powder combustor, as shown in Figure 1, Figure 2 with shown in Fig. 4, burner right-hand member connects with kiln in figure, is used for
Air and coal dust are conveyed to kiln, the Five-channel coal-powder combustor includes the fuel injector pipe 1 being sequentially coaxially socketed from inside to outside, in
Heart airduct 2, eddy flow airduct 3, coal airduct 4, outer shaft stream airduct 5 and balance wind pipe 6.
Such as Fig. 2 and 3, fuel injector pipe 1 is used for grafting installation fuel injector 19, in being formed between fuel injector pipe 1 and central air hose 2
Heart air channel 601, forms swirl air duct 602 between central air hose 2 and eddy flow airduct 3, coal airduct 4 forms coal wind with eddy flow airduct 3
Road 603, outer shaft stream airduct 5 form outer shaft stream air channel 604 with coal airduct 4, are formed between balance wind pipe 6 and outer shaft stream airduct 5 flat
Weighing apparatus air channel 605.Support block 606 is provided between adjacent channel, to improve bulk strength；The outer surface of balance wind pipe 6 sets big
Anchoring piece 16 is measured, fire clay layer 17 is set outside anchoring piece 16, for protecting pipe fitting, anchoring piece 16 is embedded in fire resisting mud layer 17,
Play fixation.
As shown in figure 1, the one end of burner away from kiln is provided with wind-guiding post 10, setting is respectively communicated with wind-guiding post 10
Have：
Outer shaft stream wind air induction conduit 11, it is connected with outer shaft stream airduct 5；
Whirl deposite tank air intake conduit 12, it is connected with eddy flow airduct 3；
Centre wind air intake conduit 13, it is connected with central air hose 2；
The side of coal airduct 4 is provided with and communicated with coal wind conduit 14；Balance wind, which is provided with and communicated with, in the outer wall of balance wind pipe 6 enters conductance
Pipe 15.
Between coal airduct 4 and outer shaft stream airduct 5 set telescopic joint 18, telescopic joint 18 is flexible structure, when burner operation simultaneously
When vibrating, telescopic joint 18 can absorb vibration, reduce influence of the vibration equipment to pipeline, and protection burner is injury-free.
As shown in Fig. 2 setting up overhead crane support 20 between coal airduct 4 and outer shaft stream airduct 5, to be connected with driving, work as burning
During device maintenance down, working position can be departed from by mobile burner of driving a vehicle, accordingly, on the junction of outer shaft stream airduct 5,
Provided with reinforcement 21, to improve pipeline bulk strength.
As shown in Fig. 3 and Fig. 5, the end of central air hose 2 is arranged with centre wind nozzle 7, and the right side of centre wind nozzle 7 is all in figure
To being evenly equipped with some centre wind exhaust vents 701, and the centre wind exhaust vent 701 is provided with two rows, centre wind exhaust vent 701
Left side is provided with air storing cavity 702；The fixed sleeves of centre wind nozzle 7 are provided with guide ring 8, the circumferential uniform some spiral shells of the outer wall of guide ring 8
Guiding gutter 801 is revolved, and the outer wall of guide ring 8 contradicts with the inwall of eddy flow airduct 3；The end of outer shaft stream airduct 5 extend internally set it is convex
Platform 9, boss 9 and the outer wall of coal airduct 4 contradict, the uniform some outer shaft stream wind exhaust vents 703 of the inner circumferential of boss 9, to spray outer shaft
Flow wind.
The right part of balance wind pipe 6, which extends internally, is provided with flange 1, and the inwall of flange 1 is axially set along balance wind pipe 6
Section is equipped with as semicircular balance air holes 62, and balances the circumference array of air holes 62 and is arranged on the inwall of flange 1, balances wind
The inwall of hole 62 is provided with some flights 63 along its axial array, and balance air holes 62 outer face is provided with chamfering 621.Outer shaft stream wind
The end of pipe 5 is provided with flange 2 51 at outer shaft stream air channel 604 laterally, and the length of flange 2 51 is less than the length of flange 1
Degree, space is left between flange 2 51 and flange 1.The one end of flange 1 and flange 2 51 inside pipeline is set respectively
It is equipped with inclined-plane 1 and inclined-plane 2 511.
Explanation is embodied：
When burner starts, the pressurization of fuel injector 19 sprays atomized diesel fuel, is lighted by the igniter in kiln, coal dust passes through
Coal airduct 4 is blown into kiln, central air hose 2, and eddy flow airduct 3 and outer shaft stream airduct 5 give wind by wind-guiding post 10, and respectively by center
Wind exhaust vent 701, spiral stream guidance groove 801 and outer shaft stream wind exhaust vent 703 are blown out.Airduct 6 is balanced with a centrifugal blower to carry
For balancing wind, based on the principle of coal injection pipe high speed difference, coal injection pipe multistage air feed effect is enhanced.
For coal dust after diesel oil ignited, fuel injector 19 stops oil spout.The wind direction of wind is balanced respectively on inclined-plane 1 and inclined-plane two
Changed at 511, so as to form vortex when entering in balance air holes 62, the vortex wind of blowout has to coal dust breaks up work
With, can more burn completely.Poured in balance wind into space 52 from entering to balance in air holes 62, in outer shaft stream airduct
Circulation is formed outside 5, improves the mixed effect of air and coal dust.So as to effectively reduce pernicious gas, and head coking is prevented, extended
Coal powder injection tube head service life；And play the role of the normal operation of three big main channels in firm, reduce maintenance cost.Flange
One 61 setting causes the end of balance wind pipe 6 to narrow, and when balancing wind into when balancing in air holes 62, wind speed improves, and strengthens it
To the stirring effect of coal dust.Burner head is present by high temperature gases recirculating in combustion process, forms negative pressuren zone, while its flame
Localized hyperthermia is eliminated, the temperature curve along kiln length changes steadily, can effectively suppress the generation of nitrogen oxides, reach energy-saving ring
The effect of guarantor.
The Five-channel coal-powder combustor, it is based on engineering using practice for many years, is fired with reference to Five-channel coal dust both domestic and external
The service condition of burner, on the basis of to the advantage and disadvantage of former four-way Five-channel coal-powder combustor fully analyze, use
The high speed difference of latest modern and strong eddy flow are theoretical, comprehensive with computer simulation technique with reference to Burning Behavior For Pulverized Coal
Consider that multidisciplinary research and development result develop.This Five-channel coal-powder combustor is applied to cement industry and other all kinds of times
Rotary kiln, there is the notable technical characterstics such as First air usage ratio is low, combustion thrust is big.The outlet jet of its high speed, strengthens significantly
The mixing of coal dust and high temperature Secondary Air, improves coal dust firing effect, burner firepower is strong, and flame profile is reasonable, to various
Ature of coal includes the strong adaptability of anthracite and the colm of low heat value；Its structure design is exquisite, and flame regulating measure is simply applicable,
And flame profile meets the needs of operating mode in kiln at any time, be advantageous to complete rational calcinating system, improve product quality；It is remarkable
Combustion characteristics, it is significant to play, improve the calcining ability of rotary kiln and improve product quality.
This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model
Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but
As long as all protected in right of the present utility model by Patent Law.
Claims (10)
1. a kind of Five-channel coal-powder combustor, including be coaxially disposed central air hose (2), eddy flow airduct (3), coal airduct (4) and
Outer shaft stream airduct (5), it is characterized in that：The outer coaxial sleeve of the outer shaft stream airduct (5) is provided with balance wind pipe (6), the balance wind pipe
(6) one end, which extends internally, is provided with flange one (61), described (61) inwall of flange one along balance wind pipe (6) it is axially arranged have cut
Face is semicircular balance air holes (62), and described balance air holes (62) circumference array is arranged on flange one (61) inwall.
2. Five-channel coal-powder combustor according to claim 1, it is characterized in that：Outer shaft stream airduct (5) end is outside
Side, which is located at outer shaft stream air channel (604) two, is provided with flange two (51), is left between the flange two (51) and flange one (61)
Space (52).
3. Five-channel coal-powder combustor according to claim 2, it is characterized in that：Described (51) length of flange two is less than flange
The one end of the length of one (61), the flange one (61) and flange two (51) inside pipeline is respectively arranged with inclined-plane one
And inclined-plane two (511) (611).
4. Five-channel coal-powder combustor according to claim 1, it is characterized in that：Air holes (62) inwall that balances is along its axle
Array is provided with some flights (63).
5. Five-channel coal-powder combustor according to claim 1, it is characterized in that：Described balance air holes (62) outer face is set
There is chamfering (621).
6. Five-channel coal-powder combustor according to claim 5, it is characterized in that：Balance wind pipe (6) outer wall is provided with
Fire resisting mud layer (17).
7. Five-channel coal-powder combustor according to claim 2, it is characterized in that：The outer shaft stream airduct (5) carries flange
One end of two (51) is inwardly horizontal-extending to be provided with boss (9), and the axial array of boss (9) interior edge outer shaft stream airduct (5) is set
It is equipped with some outer shaft stream wind exhaust vents (703).
8. Five-channel coal-powder combustor according to claim 1, it is characterized in that：Central air hose (2) end set has
The centre wind nozzle (7) of ring-type, the central air hose (2) is interior to be coaxially arranged with spray bar (1), centre wind nozzle (7) end
The circumferential uniform some centre wind exhaust vents (701) in face.
9. Five-channel coal-powder combustor according to claim 8, it is characterized in that：A left side for the centre wind exhaust vent (701)
Side is provided with air storing cavity (702).
10. Five-channel coal-powder combustor according to claim 8, it is characterized in that：Centre wind nozzle (7) fixed sleeves
Provided with guide ring (8), the circumferential uniform some spiral stream guidance grooves (801) of guide ring (8) outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720397578.4U CN206682926U (en) | 2017-04-15 | 2017-04-15 | Five-channel coal-powder combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720397578.4U CN206682926U (en) | 2017-04-15 | 2017-04-15 | Five-channel coal-powder combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206682926U true CN206682926U (en) | 2017-11-28 |
Family
ID=60400296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720397578.4U Expired - Fee Related CN206682926U (en) | 2017-04-15 | 2017-04-15 | Five-channel coal-powder combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206682926U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730970A (en) * | 2017-04-15 | 2018-11-02 | 南京建安机械制造有限公司 | Five-channel coal-powder combustor |
-
2017
- 2017-04-15 CN CN201720397578.4U patent/CN206682926U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730970A (en) * | 2017-04-15 | 2018-11-02 | 南京建安机械制造有限公司 | Five-channel coal-powder combustor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171128 Termination date: 20180415 |