CN107830517A - A kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning - Google Patents
A kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning Download PDFInfo
- Publication number
- CN107830517A CN107830517A CN201710300466.7A CN201710300466A CN107830517A CN 107830517 A CN107830517 A CN 107830517A CN 201710300466 A CN201710300466 A CN 201710300466A CN 107830517 A CN107830517 A CN 107830517A
- Authority
- CN
- China
- Prior art keywords
- wind
- burnout degree
- walls
- back wall
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 21
- 238000013461 design Methods 0.000 claims description 7
- 208000035126 Facies Diseases 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000002817 coal dust Substances 0.000 abstract description 5
- 238000010304 firing Methods 0.000 description 8
- 239000003245 coal Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
Abstract
The invention discloses the side wind and side combustion exhausted wind apparatus of a kind of front-back wall burning.The present invention includes side wind, side burnout degree.Side wind is arranged in the conplane both sides of upper strata main burner, close to both walls.Side burnout degree is arranged in the conplane both sides of main burnout degree, close to both walls.For front-back wall burning boiler both walls CO concentration it is high the problem of, arrange side wind and side burnout degree, not only supplemented with the air quantity near both walls, the more effective vortex reduced near both walls, make gas stream in the stove structure and coal dust distribution more reasonable, so as to be greatly reduced or even eliminate CO growing amounts too high near both walls.Boiler efficiency is not only increased, also reduces both walls water wall high temperature corrosion and slagging liability.
Description
Technical field
The invention belongs to energy-conserving and emission-cutting technology field, is related to a kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning.
Background technology
The burning of coal dust opposed firing is one of primary combustion technology of current large-sized station boiler, in theory with stove
It is excellent that heat load distribution is more uniformly in even flow field, furnace profile, furnace outlet flue gas does not have Residual torsion, gas temperature windage small etc.
Point.Compared with corner tangential firing, opposed firing burning is the combustion using single burner as unit independent body wind powder air-flow
Burn, when boiler capacity increases, boiler only needs to increase furnace width and increases each layer number of burners, fluid field in furnace, stove
Heat load distribution, furnace outlet gas temperature deviation are unrelated with the size of boiler capacity on thorax section.Therefore, opposed firing burning exists
It is widely used on the unit of 600MW and above capacity.
It was verified that opposed firing burning generally existing CO concentration of emissions are too high, burner hearth both walls center high temperature
The problems such as corrosion tendency is serious, burning NOx concentration is higher.According to test, the CO of boiler tail is distributed between presentation both sides senior middle school
The high state in the low centre in both sides is presented in low, oxygen amount distribution, illustrates that there is anaerobic condition burner hearth both sides in stove combustion process.
In order to reduce CO concentration of emissions, the method that most units use " bowl formula air distribution ", i.e. intermediate combustion device throttle opening
Less than both sides burner throttle aperture, to increase the air feed of both sides on the premise of total blast volume is constant, practice have shown that with one
Fixed effect, but do not cause that CO distributions are substantially uniform, illustrate not tackling the problem at its root.
Opposite Firing Boiler water wall high temperature corrosion occurs in primarily in the both walls middle area near after-flame stratification of wind
Domain, to reduce water wall high temperature corrosion problem, part combustion system respectively adds one close to both walls in after-flame stratification of wind bottom
Side burnout degree, it is therefore an objective to increasing oxygen amount close to both walls near wall, to reduce the CO concentration in the region.It was verified that tool
High Temperature Corrosion still be present in the boiler water wall for having side burnout degree.
To solve the above problems, applicant has carried out the CO formation mechanisms research of detailed opposed firing burning, research
As a result show, burner to the side wall of Opposite Firing Boiler has larger space, makes breeze airflow in uphill process
In flowed simultaneously to both walls, form vortex, and then cause gas solid separation coal dust is more concentrated on both walls compared to air
Centre position, so as to cause the distribution of combustion process apoplexy coal uncoordinated, both walls intermediate region coal dust amount is larger and anoxycausis,
So that the CO of the Area generation is dense and forms reducing atmosphere.The purpose of design of current side burnout degree is to supplement the area
The oxygen amount in domain, but it is arranged in main burnout degree bottom, therefore for the after-flame stratification of wind of side, burner hearth interphase is compared with side wall
Bigger space, side burnout degree enter burner hearth after flowed according to anticipation along side wall, but with coal burner or master
Burnout degree streamline is just the opposite, side after-flame wind direction burner hearth intermediate flow, therefore actual side burnout degree does not supplement both sides
Oxygen amount required for wall.
The content of the invention
Asked in order to which the boiler combustion CO concentration distributions for solving to be related in background technology are uneven, average emission concentration is higher
Topic, the invention provides the side wind and side combustion exhausted wind apparatus of a kind of front-back wall burning, and on upper strata, coal burner aspect is arranged
Side wind, in main burnout degree aspect arrange side burnout degree so that air feed more meets hydrodynamic characteristic, on the one hand reduces both walls
Neighbouring vortex, on the other hand really supplement the air quantity near both walls.
The technical solution adopted for the present invention to solve the technical problems：
A kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning, including side wind, side burnout degree.
Described side wind, the conplane both sides of upper strata main burner are arranged in, close to both walls.Side wind can use
Binary channels or single channel air-supply.Channel structure is middle circular direct current wind passage, periphery circular cyclone wind passage, Whirl deposite tank
Swirl strength is adjustable using blade, is controlled for ease of air quantity and flow field structure, the air quantity of two passages is each adjustable.Single channel is
Only with a direct current wind passage, flow is adjustable.Side wind comes from secondary air box, theoretical highest air outlet velocity and Secondary Air base
This is consistent, on this condition, the discharge area of single side wind nozzle for single burner Secondary Air discharge area 20% with
On.The specific parameter such as side wind and the spacing of side wall, the selection of passage, discharge area need to according to the burner structure of reality with
Arrangement etc. optimizes design.
Described side burnout degree, current existing side burnout degree is different from, is arranged in the conplane both sides of main burnout degree,
Close to both walls.Side burnout degree in principle can use with the same or analogous structure of main burnout degree, also can be according to practical flow field knot
Structure uses blows with binary channels as the wind facies of side or single channel.Side burnout degree comes from burnout degree bellows, theoretical highest outlet
Wind speed and main burnout degree are basically identical, and on this condition, the discharge area of single side burnout degree nozzle goes out for single only main burnout degree
More than the 20% of open area.The specific parameter such as side burnout degree and the spacing of side wall, the selection of passage, discharge area need to be according to reality
The main burnout degree structure and arrangement on border etc. optimize design.
According to the actual operating state of most boilers, the both walls water wall high temperature corrosion situation of burnout degree bottom is relatively
Gently, it is relative to also indicate that the wind coal of the both sides wall zone between main burner and burnout degree is distributed uncoordinated situation for theoretical research
It is relatively light, so whether must arrange that side wind can flexibly determine according to actual conditions.
The beneficial effects of the invention are as follows：
The present invention is not only according to the air quantity demand near both walls, according still further to fluid field in furnace topology requirement, arrangement
Side wind and side burnout degree, not only supplemented with the air quantity near both walls, the vortex near both walls is more effectively reduced, makes stove
Interior air-flow structure and coal dust distribution are more reasonable, so as to be greatly reduced or even eliminate CO generations too high near both walls
Amount.Boiler CO concentration of emissions are not only reduced, improve boiler efficiency, also reduce both walls water wall high temperature corrosion and slagging
Tendentiousness.
Brief description of the drawings
Fig. 1 (a) is system schematic.
Fig. 1 (b) is system schematic.
In figure, 1, side wind；2nd, side burnout degree；3rd, main burner；4th, main burnout degree.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in figure 1, the side wind and side combustion exhausted wind apparatus of a kind of burning of front-back wall, including side wind 1, side burnout degree 2,
Main burner 3, main burnout degree 4.
Described side wind 1,3 conplane both sides of upper strata main burner are arranged in, close to both walls.Side wind 1 can
Blown using binary channels or single channel.Channel structure is middle circular direct current wind passage, periphery circular cyclone wind passage, eddy flow
The swirl strength of wind is adjustable using blade, is controlled for ease of air quantity and flow field structure, the air quantity of two passages is each adjustable.Single-pass
Road is that flow is adjustable only with a direct current wind passage.Side wind 1 comes from secondary air box, theoretical highest air outlet velocity and two
Secondary wind is basically identical, and on this condition, the discharge area of the single nozzle of side wind 1 is the single Secondary Air exit face of main burner 3
Long-pending more than 20%.The parameter such as specific side wind 1 and the spacing of side wall, the selection of passage, discharge area need to be according to reality
Burner structure and arrangement etc. optimize design.
Described side burnout degree 2, current existing side burnout degree is different from, is arranged in main burnout degree 4 conplane two
Side, close to both walls.Side burnout degree 2 in principle can use with main 4 same or analogous structure of burnout degree, also can be according to actual stream
Field structure uses blows with binary channels as the wind facies of side or single channel.Side burnout degree 2 comes from burnout degree bellows, theoretical highest
Air outlet velocity and main burnout degree are basically identical, and on this condition, the discharge area of the single nozzle of side burnout degree 2 is single only main after-flame
More than the 20% of the discharge area of wind 4.The parameter such as specific side burnout degree 2 and the spacing of side wall, the selection of passage, discharge area needs
Design is optimized according to the structure of main burnout degree 4 of reality and arrangement etc..
According to the actual operating state of most boilers, the both walls water wall high temperature corrosion situation of burnout degree bottom is relatively
Gently, it is relative to also indicate that the wind coal of the both sides wall zone between main burner and burnout degree is distributed uncoordinated situation for theoretical research
It is relatively light, so whether must arrange that side wind 1 can flexibly determine according to actual conditions.
Described main burner 3, every layer of nozzle quantity of main burnout degree 4 it is different according to boiler capacity and model and may not
Together, two kinds of arrangement forms that every layer number is 4 and 6 are respectively illustrated in Fig. 1 (a) and (b).
Claims (7)
1. a kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning, it is characterised in that including side wind, side burnout degree；
Described side wind, the conplane both sides of upper strata main burner are arranged in, close to both walls；
Described side burnout degree, current existing side burnout degree is different from, is arranged in the conplane both sides of main burnout degree, it is close
Both walls.
2. the side wind and side combustion exhausted wind apparatus of a kind of front-back wall burning according to claim 1, it is characterised in that described
Side elegance binary channels or single channel air-supply.
3. the side wind and side combustion exhausted wind apparatus of a kind of front-back wall burning according to claim 2, it is characterised in that described
Channel structure be middle circular direct current wind passage, periphery circular cyclone wind passage, the swirl strength of Whirl deposite tank uses blade
It is adjustable, controlled for ease of air quantity and flow field structure, the air quantity of two passages is each adjustable；Single channel is only with a direct current wind
Passage, flow are adjustable.
4. the side wind and side combustion exhausted wind apparatus of a kind of front-back wall burning according to Claims 2 or 3, it is characterised in that institute
The side wind stated comes from secondary air box, and theoretical highest air outlet velocity and Secondary Air are basically identical, on this condition, single side
The discharge area of wind nozzle is more than the 20% of single burner Secondary Air discharge area；Specifically between side wind and side wall
Design need to be optimized according to the burner structure of reality and arrangement etc. away from, the selection of passage, discharge area.
5. the side wind and side combustion exhausted wind apparatus of a kind of front-back wall burning according to claim 1, it is characterised in that described
Side burnout degree use and the same or analogous structure of main burnout degree.
6. the side wind and side combustion exhausted wind apparatus of a kind of front-back wall burning according to claim 1, it is characterised in that described
Side burnout degree according to practical flow field structure use with side wind facies as binary channels or single channel air-supply.
7. the side wind and side combustion exhausted wind apparatus of a kind of front-back wall burning according to claim 5 or 6, it is characterised in that institute
The side burnout degree stated comes from burnout degree bellows, and theoretical highest air outlet velocity and main burnout degree are basically identical, on this condition, single
The discharge area of side burnout degree nozzle is more than the 20% of single only main burnout degree discharge area；Specific side burnout degree and side wall
Spacing, the selection of passage, discharge area design need to be optimized according to the main burnout degree structure of reality and arrangement etc..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710300466.7A CN107830517A (en) | 2017-05-02 | 2017-05-02 | A kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710300466.7A CN107830517A (en) | 2017-05-02 | 2017-05-02 | A kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107830517A true CN107830517A (en) | 2018-03-23 |
Family
ID=61643778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710300466.7A Pending CN107830517A (en) | 2017-05-02 | 2017-05-02 | A kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107830517A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454982A (en) * | 2010-10-29 | 2012-05-16 | 烟台龙源电力技术股份有限公司 | After-flaming air nozzle arrangement structure |
| CN102506419A (en) * | 2011-09-30 | 2012-06-20 | 哈尔滨工业大学 | Wall-type arranged two-stage burn-up air device |
| CN103148506A (en) * | 2013-03-29 | 2013-06-12 | 广东电网公司电力科学研究院 | Secondary air distribution method for pulverized coal boiler with swirling combustion of front-back hedging |
| KR101349913B1 (en) * | 2013-07-09 | 2014-02-03 | 놀뫼보일러(주) | Air dispersion type burner for pellet boiler |
| CN103672867A (en) * | 2013-11-29 | 2014-03-26 | 华电电力科学研究院 | Efficient low-pollution W-shaped flame boiler OFA (over fire air) device and method |
| CN204006635U (en) * | 2014-08-05 | 2014-12-10 | 河北光磊炉业有限公司 | A kind of anthracite combustion environment-protection boiler |
| CN205592939U (en) * | 2016-05-12 | 2016-09-21 | 中国神华能源股份有限公司 | Boiler air distribution arrangement structure |
| CN207247192U (en) * | 2017-05-02 | 2018-04-17 | 浙江大学 | The side wind and side combustion exhausted wind apparatus of front-back wall burning |
-
2017
- 2017-05-02 CN CN201710300466.7A patent/CN107830517A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454982A (en) * | 2010-10-29 | 2012-05-16 | 烟台龙源电力技术股份有限公司 | After-flaming air nozzle arrangement structure |
| CN102506419A (en) * | 2011-09-30 | 2012-06-20 | 哈尔滨工业大学 | Wall-type arranged two-stage burn-up air device |
| CN103148506A (en) * | 2013-03-29 | 2013-06-12 | 广东电网公司电力科学研究院 | Secondary air distribution method for pulverized coal boiler with swirling combustion of front-back hedging |
| KR101349913B1 (en) * | 2013-07-09 | 2014-02-03 | 놀뫼보일러(주) | Air dispersion type burner for pellet boiler |
| CN103672867A (en) * | 2013-11-29 | 2014-03-26 | 华电电力科学研究院 | Efficient low-pollution W-shaped flame boiler OFA (over fire air) device and method |
| CN204006635U (en) * | 2014-08-05 | 2014-12-10 | 河北光磊炉业有限公司 | A kind of anthracite combustion environment-protection boiler |
| CN205592939U (en) * | 2016-05-12 | 2016-09-21 | 中国神华能源股份有限公司 | Boiler air distribution arrangement structure |
| CN207247192U (en) * | 2017-05-02 | 2018-04-17 | 浙江大学 | The side wind and side combustion exhausted wind apparatus of front-back wall burning |
Non-Patent Citations (1)
| Title |
|---|
| 周永刚等: "基于燃烧均匀性的对冲燃烧锅炉高温腐蚀抑制", 《浙江大学学报(工学版)》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1333199C (en) | W-shape flame furnace with gradation coal burner | |
| CN102588959B (en) | Gas-solid separator of recirculating fluidized bed boiler and boiler comprising same | |
| CN103216821B (en) | Multi-stage stratified combustion system and method for primary air and secondary air of boiler | |
| CN203980331U (en) | Prevent the anti-scorch wind system of four jiaos of serious cokings of " W " stove | |
| CN106838892A (en) | A kind of energy-efficient Circulating Fluidized Bed Boiler of low nitrogen | |
| CN107559821A (en) | The multiple-pass industrial coal powder boiler of flue gas recirculation and vortex burner overhead | |
| CN204554801U (en) | Circulating fluid bed boiler secondary air hierarchical arrangement system | |
| CN205014343U (en) | W flame boiler | |
| CN107477572A (en) | Using the center feeding rotational flow coal dust burner of separation Secondary Air bilayer jet | |
| CN104654289B (en) | A kind of crop straw burning fluidized-bed combustion boiler | |
| CN207247192U (en) | The side wind and side combustion exhausted wind apparatus of front-back wall burning | |
| CN103868055A (en) | Regenerative combustion device applicable to stable combustion of compounded tangent-flow and direct-flow gas with low calorific value | |
| CN206944137U (en) | CFBB based on denitration minimum discharge technology | |
| CN101280919A (en) | Forward and backward wall opposite rushing combustion boiler hearth as well as method for arranging air nozzle on side wall | |
| CN206919000U (en) | A kind of differential fluidized-bed boiler system | |
| CN203893159U (en) | Front-back wall opposed firing boiler with closing-to-wall sidewall and auxiliary tangential air arrangement | |
| CN207635377U (en) | A kind of biomass boiler air hose deployment mechanism of swirl combustion | |
| CN107830517A (en) | A kind of the side wind and side combustion exhausted wind apparatus of front-back wall burning | |
| CN109631022A (en) | A kind of coal powder burner with flue gas recirculation for industrial coal powder boiler | |
| CN108775579A (en) | A kind of circulating fluidized bed boiler | |
| CN104154532A (en) | Center air ring concentrated type turbulent burner | |
| CN210601589U (en) | Flow state balance pulverized coal circulating fluidized combustion boiler | |
| CN209801462U (en) | Chain furnace with flue gas recirculation | |
| CN203656910U (en) | W flame boiler and combustion device thereof | |
| CN208418711U (en) | A kind of circulating fluidized bed boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Jianguo Inventor after: Xie Xiaoqiang Inventor after: Zhao Hong Inventor after: Zhao Min Inventor before: Yang Jianguo Inventor before: Zhao Hong Inventor before: Xie Xiaoqiang Inventor before: Zhao Min |
|
| CB03 | Change of inventor or designer information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180323 |
|
| RJ01 | Rejection of invention patent application after publication |