CN107246608A - A kind of Researched of Air Staging Combustion Burning Pulverized Coal device and air classification collocation method - Google Patents
A kind of Researched of Air Staging Combustion Burning Pulverized Coal device and air classification collocation method Download PDFInfo
- Publication number
- CN107246608A CN107246608A CN201710574451.XA CN201710574451A CN107246608A CN 107246608 A CN107246608 A CN 107246608A CN 201710574451 A CN201710574451 A CN 201710574451A CN 107246608 A CN107246608 A CN 107246608A
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- Prior art keywords
- air
- combustion
- burner
- outer layer
- fixed plate
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003245 coal Substances 0.000 title claims description 8
- 239000007921 spray Substances 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims description 9
- 210000000867 larynx Anatomy 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000028867 ischemia Diseases 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to a kind of burner of air classification and its air classification collocation method, what is solved is to reduce the technical problem of NOx discharge.Belong to combustion apparatus drop drainage technique field.The burner includes aditus laryngis, burner, outer shroud cylinder, and is brought into close contact the refractory masses connected with outer shroud cylinder, it is characterised in that：It is outer layer combustion air passage between aditus laryngis and outer shroud cylinder, Board position is fixed in the front end of outer layer combustion air passage, is equipped with annular slit spout/or cylindric spray gun pipette tips, and slit spout/cylindric spray gun pipette tips jet direction is tilted to the surrounding furnace wall of burner hearth.The present invention carries out combustion air hierarchical arrangement, 5%~30% combustion-supporting air quantity is set to enter outside aditus laryngis in combustion air passage, sprayed from annular slit spout/or cylindric spray gun pipette tips, reduce the configuration amount of combustion air in aditus laryngis, overall bias combustion is carried out in boiler combustion primary zone domain, NOx ultralow nitrogen discharged purpose is reached.
Description
Technical field
The present invention relates to a kind of burner of air classification, more particularly to a kind of air of high heating value gas combustion apparatus
Hierarchical arrangement method, the flame of generation can be matched with various boiler furnaces, reach NOxMinimum discharge purpose, belongs to Industrial Boiler
Drainage technique field drops.
Background technology
Under the overall situation of energy-saving and emission-reduction, NOx limit value is more and more tighter in emission standard of air pollutants for boilers.Beijing
In 1 day April in 2017, implement most stringent of air pollution emission standard, newly-built gas fired-boiler NOx emission reduction must be arrived
30mg/Nm3Hereinafter, built boiler NOx emission limit is 80mg/Nm3.Beijing Municipal Government, for built oil-burning gas-fired boiler,
Implement the mode that low nitrogen transformation is given rewards in place of subsidies, by financial subsidies, actively encourage heat and power supply unit to be reduced to NOx discharge
80 mg/Nm3Below.
Afterbody denitration（SCR and SNCR）NOx discharge index can be reduced to 30 mg/Nm3Hereinafter, but need expensive
Up-front investment and operating cost.
Traditional natural gas low NO, fuel and air are arranged in the aditus laryngis of burner, and NOx discharge is
60-130mg/Nm3, it is difficult to reach 30 mg/Nm3Emission limit.Also occur in that a class novel gas point successively currently on the market
Some gases spray gun, i.e., be arranged in outside aditus laryngis, realize the stratified combustion and bias combustion outside combustion gas, and expand by section burner
Combustion range, NOx emission can be reduced to a certain extent, but if dealt with improperly, it may appear that strenuous vibration problem.Fall in market
Technological innovation is forced, gas industry low NO must carry out technological innovation, explore new air distribution mode, realize and fired only with low nitrogen
The mode of burning, reduces NOx initial ejection index as far as possible, until 30 mg/Nm3, meet the requirement of most strict standard.
The content of the invention
The purpose of the present invention is：A kind of Researched of Air Staging Combustion Burning Pulverized Coal device is provided, on the premise of full combustion of fuel is ensured,
Boiler combustion primary zone domain carries out overall bias combustion, reduces the mean temperature and peak temperature of burner flame, reaches NOx
Ultralow nitrogen discharged purpose.
The technical scheme is that：A kind of Researched of Air Staging Combustion Burning Pulverized Coal device, including burner, aditus laryngis, outer layer combustion air
Passage, outer shroud cylinder and refractory masses, it is characterised in that：Lead between the aditus laryngis and outer shroud cylinder for outer layer combustion air
Road, the outer layer combustion air Channel front end is equipped with fixed plate；The burner, aditus laryngis, fixed plate and it is placed in the fixed plate
On outer air nozzle, outer shroud cylinder, be sequentially coaxially symmetrical arranged inside-out, the outer shroud drum outer wall and the refractory material
Layer inwall laminating is connected：The inlet end of the outer air nozzle and the fixed plate are welded to connect fixation, and with the outer layer
The connection of combustion air passage is communicated, and jet direction is inclined with the angular burner hearth surroundings of α between the axis of the burner
Tiltedly.
The outer air nozzle is made up of outer shroud cylinder front end periphery and the fixed plate circumferential edge between
Annular slit spout, the outer layer combustion air entered from outer layer combustion air passage is sprayed into combustion chamber by slit spout；
The cylindrical spray gun of outer air nozzle, quantity has multiple, can be grouped along along the fixed plate periphery different half
The installation loop wire in footpath is uniformly arranged, and installation loop wire of each group of cylindric spray gun along same radius is uniformly arranged；Different component is other
Installation loop wire around different radii is uniformly arranged.
The air classification collocation method of the burner of the air classification, it is characterised in that：Set outside burner throat
Outer air nozzle, 70%~95% combustion-supporting air quantity sprays from burner throat interior zone, remaining 5%~30% combustion-supporting sky
Tolerance enters from burner outer layer combustion air passage, and burner hearth is sprayed into by outer air nozzle.
Burner throat inner region reduces the arrangement of combustion air, forms dense burning, causes the purpose of ischaemia：One side
Face reduces flame mean temperature and peak temperature, reduces thermal NO x generation；On the other hand not sufficiently combusted fuel
The reducing substanceses such as CO, C or HCN will be generated, reducing atmosphere is formed, the NOx of generation is reduced at high temperature, further drop
Low NOx concentration of emission.Phase oxygen-rich area burns away guarantee burning fully to the CO of foregoing not sufficiently combusted generation after combustion,
The discharge for making CO is zero, although and now air is enough because flame temperature is low, the NOx of generation is few.Therefore the device is in skill
Under art precondition for innovation, realize less than 30mg/Nm3Ultra-low NOx emission.
The positive effect of the present invention is：There is provided a kind of burner of air classification, air classification method is innovated, in combustion
Burner outer layer sets outer layer combustion air passage and outer air nozzle, and overall deep or light combustion is formed in boiler combustion primary zone domain
Burn, under the premise of clean-burning, be less than 30mg/Nm3Ultra-low NOx emission.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the burner structural representation of air classification of the present invention（Configure outer air slit spout）；
Fig. 2 is Fig. 1 A to structural representation（Slit spout）；
Fig. 3 is the burner structural representation of air classification of the present invention（Configure two groups of cylindric spray guns）；
Fig. 4 is Fig. 3 A to structural representation；
Fig. 5 is the track schematic diagram that outer air sprays.
In figure：1. burner；2. aditus laryngis；3. outer layer combustion air passage；4. outer shroud cylinder；5. slit spout；6. it is cylindric
Spray gun pipette tips；7. fixed plate；8. refractory masses；9. cylindric spray gun installs loop wire.
Embodiment
Fig. 1~Fig. 4 is the burner structural representation that a kind of gas-air is classified, from diagram, a kind of air point
The burner of level, including burner 1, aditus laryngis 2, outer layer combustion air passage 3 and outer shroud cylinder 4, it is characterised in that：The aditus laryngis
It is outer layer combustion air passage 3 between 2 and outer shroud cylinder 4, the front end of outer layer combustion air passage 3 is equipped with fixed plate 7；Institute
Burner 1, aditus laryngis 2, fixed plate 7 and the outer air nozzle being placed in the fixed plate 7, outer shroud cylinder 4 are stated, inside-out successively
Coaxial-symmetrical is set；4 outer walls of the outer shroud cylinder are fitted with the inwall of refractory masses 8 to be connected：The outer air nozzle
Inlet end is welded and fixed with the fixed plate 7 and is connected, and is connected and communicates with the outer layer combustion air passage 3, jet side
The angular burner hearth surroundings of α are tilted between the axis of burner described in Xiang Yiyu.
Fig. 1 and Fig. 2 are the burner structures of air classification of the present invention to configure outer air slit spout as embodiment
Schematic diagram.The outer air nozzle is made up of the outer shroud 4 front end peripheries of cylinder and the circumferential edge of the fixed plate 7 between
Annular slit spout 5, the outer air entered from outer layer combustion air passage 3 is sprayed into combustion chamber by slit spout 5.
Outer air nozzle described in Fig. 3 and Fig. 4 is spray gun pipette tips 6, and cylindrical, quantity has multiple, can be grouped on demand
Set, and loop wire is installed along the surface of fixed plate 7 and be connected with the fixed plate 7, each group is with the axle center of burner
It is uniformly arranged for the center of circle, along the installation loop wire 9 of setting radius.Cylindric 6 points of internal layers of spray gun pipette tips and outer layer two in Fig. 3 and Fig. 4
Group is configured to example, and different component is not uniformly arranged around the installation loop wire 9 of different radii；Same group of cylindric spray gun pipette tips 6 are along same
The installation loop wire 9 of Radius is uniformly arranged.
Outer layer combustion air passage 3 is arranged at the outer ledge of aditus laryngis 2, is made up of aditus laryngis 2 and outer shroud cylinder 4, outer shroud cylinder 4
Outside be refractory masses 8.Fixed plate 7 is refractory material.When outer air nozzle uses annular slit 5 form of spout,
Outer shroud cylinder 4 and the circumferential edge of fixed plate 7 form the slit spout 5 of outer layer combustion air between.When outer air nozzle is using circle
During the form of column spray gun pipette tips 6, be equipped with fixed plate 7 spray gun pipette tips 6 install loop wire 9, the tail end of outer air gun pipette tips 6 with
Pipette tips positioning hole in fixed plate 7 is fixedly connected and communicated with the outer layer combustion air passage 3, and the head of spray gun pipette tips 6 is goed deep into
To burner hearth.
During work, with 70%~95% combustion air in burner, because air capacity is not enough in burner, dense combustion is carried out
Burn, one side air capacity is not enough, fuel is not sufficiently combusted, and the heat contained in fuel is not discharged fully, reduction flame is put down
Equal temperature and peak temperature, reduce thermal NO x generation；Another aspect fuel can divide the CO with strong reducing property,
H2, the material such as HCN, suppress and reduce NOx generation；The high temperature mixed flue gas that burning is produced diffuses to the periphery of burner 1（As schemed
Shown in 5）, 5%~30% combustion-supporting air quantity sprayed at a high speed from the air gun pipette tips 6 of outer air slit spout 5/ or outer is met,
Carry out light burning, the enough air of material chance such as CO of not sufficiently combusted generation burn away to complete, and CO discharge is zero.
The present invention sets outer layer combustion air passage 3 on the outside of burner, is carried out in boiler combustion primary zone domain overall dense
Light burning, reduction flame mean temperature and peak temperature, reduce NOx generation, so as to be less than 30mg/Nm3Ultralow NOx
Discharge, and produced without CO.
Claims (4)
1. a kind of Researched of Air Staging Combustion Burning Pulverized Coal device, including burner, aditus laryngis, outer air passage, outer shroud cylinder and refractory masses, its
It is characterised by：It is outer layer combustion air passage, the outer layer combustion air Channel front end between the aditus laryngis and outer shroud cylinder
It is equipped with fixed plate；The burner, aditus laryngis, fixed plate and the outer air nozzle being placed in the fixed plate, outer shroud cylinder, from inner
Outwards sequentially coaxially it is symmetrical arranged, the outer shroud drum outer wall is fitted with the refractory masses inwall to be connected：The outer air
The inlet end of nozzle is welded and fixed with the fixed plate and is connected, and is connected and communicates with the outer layer combustion air passage, nozzle spray
Gas direction is tilted with the angular burner hearth surroundings of α between the axis of the burner.
2. a kind of Researched of Air Staging Combustion Burning Pulverized Coal device according to claim 1, it is characterised in that：The outer air nozzle is by institute
The annular slit spout that outer shroud cylinder front end periphery and the fixed plate circumferential edge are constituted between is stated, it is logical from outer layer combustion air
The outer layer combustion air that road enters, is sprayed into combustion chamber by crack spout.
3. a kind of Researched of Air Staging Combustion Burning Pulverized Coal device according to claim 1, it is characterised in that：The outer air nozzle is in cylinder
Shape spray gun, quantity has multiple, and the installation loop wire that can be grouped the different radii along along the fixed plate periphery is uniformly arranged, each group
Installation loop wire of the cylindric spray gun along same radius is uniformly arranged, and different component is not set uniformly around the installation loop wire of different radii
Put.
4. a kind of air classification collocation method of Researched of Air Staging Combustion Burning Pulverized Coal device described in claim 1, it is characterised in that：Burner larynx
Outer air nozzle is set on mouth outer stationary plates, and 70%~95% combustion-supporting air quantity sprays from burner throat interior zone, its
Remaining 5%~30% combustion-supporting air quantity from burner outer layer combustion air passage enter, by outer air nozzle spray into burner hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574451.XA CN107246608A (en) | 2017-07-14 | 2017-07-14 | A kind of Researched of Air Staging Combustion Burning Pulverized Coal device and air classification collocation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574451.XA CN107246608A (en) | 2017-07-14 | 2017-07-14 | A kind of Researched of Air Staging Combustion Burning Pulverized Coal device and air classification collocation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107246608A true CN107246608A (en) | 2017-10-13 |
Family
ID=60014510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710574451.XA Pending CN107246608A (en) | 2017-07-14 | 2017-07-14 | A kind of Researched of Air Staging Combustion Burning Pulverized Coal device and air classification collocation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107246608A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2511874Y (en) * | 2001-12-29 | 2002-09-18 | 宝山钢铁股份有限公司 | Heat storing burner for blast furnace gas |
| CN202598516U (en) * | 2012-05-29 | 2012-12-12 | 天华化工机械及自动化研究设计院 | Air classification gas burner for achieving low nitrogen oxide (NOx) discharge at bottom of cracking furnace |
| CN203744252U (en) * | 2014-02-19 | 2014-07-30 | 陈立均 | Low-pollution-zone flue gas recirculation low nitrogen oxide burner |
| CN105627313A (en) * | 2014-10-28 | 2016-06-01 | 烟台龙源电力技术股份有限公司 | Low-nitrogen gas burner and gas boiler |
| CN105805743A (en) * | 2016-05-30 | 2016-07-27 | 穆瑞力 | Low-nitrogen energy-saving combustion unit of combustor |
| CN206958900U (en) * | 2017-07-14 | 2018-02-02 | 上海华之邦科技股份有限公司 | A kind of Researched of Air Staging Combustion Burning Pulverized Coal device |
-
2017
- 2017-07-14 CN CN201710574451.XA patent/CN107246608A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2511874Y (en) * | 2001-12-29 | 2002-09-18 | 宝山钢铁股份有限公司 | Heat storing burner for blast furnace gas |
| CN202598516U (en) * | 2012-05-29 | 2012-12-12 | 天华化工机械及自动化研究设计院 | Air classification gas burner for achieving low nitrogen oxide (NOx) discharge at bottom of cracking furnace |
| CN203744252U (en) * | 2014-02-19 | 2014-07-30 | 陈立均 | Low-pollution-zone flue gas recirculation low nitrogen oxide burner |
| CN105627313A (en) * | 2014-10-28 | 2016-06-01 | 烟台龙源电力技术股份有限公司 | Low-nitrogen gas burner and gas boiler |
| CN105805743A (en) * | 2016-05-30 | 2016-07-27 | 穆瑞力 | Low-nitrogen energy-saving combustion unit of combustor |
| CN206958900U (en) * | 2017-07-14 | 2018-02-02 | 上海华之邦科技股份有限公司 | A kind of Researched of Air Staging Combustion Burning Pulverized Coal device |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171013 |
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