CN1074993A - The straight-through pulverized coal burner of band combined combustion stabilizer - Google Patents
The straight-through pulverized coal burner of band combined combustion stabilizer Download PDFInfo
- Publication number
- CN1074993A CN1074993A CN 92100588 CN92100588A CN1074993A CN 1074993 A CN1074993 A CN 1074993A CN 92100588 CN92100588 CN 92100588 CN 92100588 A CN92100588 A CN 92100588A CN 1074993 A CN1074993 A CN 1074993A
- Authority
- CN
- China
- Prior art keywords
- stabilizer
- pulverized coal
- straight
- coal burner
- burner
- 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.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 22
- 239000003381 stabilizer Substances 0.000 title claims abstract description 17
- 210000004894 snout Anatomy 0.000 claims abstract description 10
- 230000003134 recirculating effect Effects 0.000 abstract description 10
- 239000000295 fuel oil Substances 0.000 abstract description 5
- 238000010992 reflux Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 3
- 230000011218 segmentation Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 description 7
- 238000011105 stabilization Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000002817 coal dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000011044 inertial separation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Abstract
A kind of straight-through pulverized coal burner with combined combustion stabilizer, it is to install a U-shaped body stabilizer and two current dividers in a wind snout additional, this combined combustion stabilizer can make near the recirculating zone that forms the burner outlet has higher coal powder density, thereby can give full play to the advantage that refluxes and burn, breeze airflow is caught fire in advance, keep the stove internal combustion stable, both can save ignition of the boiler with oily and help fuel oil, it is changeable to adapt to coal again.Simultaneously can outside a wind snout, form the segmentation combustion conditions, thereby reduce NO greatly
xDischarging.In addition, also have simple in structurely, easy for installation, be particularly suitable for building the transformation of boiler.
Description
The present invention is a kind of burner on the coal-dust combustion device, particularly relates to a kind of burner on a kind of direct-flow pulverized coal combustion equipment.
In the prior art, adopt the pulverized-coal fired boiler of direct-flow pulverized coal combustion technology, adopt the straight-through pulverized coal burner of four jiaos of layouts, tangential firing mostly, one time wind snout is generally rectangle.This class straight-through pulverized coal burner will be lighted a fire with a large amount of fuel oil when boiler ignition start; When reducing load operation, in order to keep boiler smooth combustion, it is combustion-supporting also will to throw oil.In order to address this problem, Chinese patent 85109436 promptly " is with the coal burner of flameholder ", has all obtained preferably effect with oil and low-load combustion-stabilizing with aspects such as oil and maintenance flame stabilizations in the saving ignition of the boiler.It is to install a flame stabilization ship in the breeze airflow spout of straight-through pulverized coal burner additional, because the special planform of this flame stabilization ship, can near the outlet of a wind snout, form waisting shape jet, and form zone with high concentration pulverized coal, high temperature and suitable oxygen concentration in the waisting portion of primary air jet both sides, be commonly referred to " San Gao district ".This is the ablaze zone that helps of a part, at first burns at this regional initial burning when breeze airflow is injected in the stove, thereby can keep flame stabilization, saves a large amount of ignition oils and helps fuel oil.But in air-flow streams the recirculating zone that hull forms, coal dust seldom, temperature is lower, thereby can not catch fire, the advantage of the burning that refluxes does not develop well.
At above-mentioned situation, the objective of the invention is provides a kind of coal burner with following function for direct-flow pulverized coal combustion equipment, this burner can make the burner outlet place form the breeze airflow of high concentration, and make the breeze airflow of formed high concentration directly inject in the high temperature recirculation zone, be beneficial to fire burns, the maintenance flame stabilization is saved ignition oil more and underload helps fuel oil, further improves the adaptive capacity to the variation and the ature of coal variation of load.
The object of the present invention is achieved like this: install a combined combustion stabilizer in the divergent segment of a wind snout additional, this combined combustion stabilizer is made up of U type body stabilizer and two current dividers of a band torch oil gun.Because the inertial separation effect of U type body stabilizer and the shunting action of current divider can will be divided into deep or light each two strands of air-flow by the next breeze airflow of airduct.Utilize the ejector action of light breeze airflow, outside spout, form the recirculating zone, and the breeze airflow of high concentration is directly injected in the recirculating zone.Like this near the recirculating zone the outlet of burner, because the very breeze airflow of high concentration is arranged, thereby helping fire burns, keep flame stabilization, thereby achieve the above object.
The present invention compared with prior art, its advantage is can make near the recirculating zone that forms the burner outlet has higher coal powder density, thereby can give full play to the advantage that refluxes and burn, breeze airflow is caught fire in advance, improve combustion zone temperature, keep the stove internal combustion stable, further improve the underrun ability, it is changeable to adapt to coal, saves ignition of the boiler in a large number and helps fuel oil.Simultaneously can inject position and direction, outside a wind snout, form the segmentation combustion conditions, promptly form the primary combustion zone of anoxycausis and the intermediate zone of oxygen abundance, thereby reduce the discharging of NOx greatly by what reasonably organize dense, light each two strands of breeze airflow.In addition, the present invention also has characteristics such as simple in structure, easy for installation, is suitable for building the repacking of boiler.
Accompanying drawing 1 is the structural principle schematic diagram of the straight-through pulverized coal burner of band combined combustion stabilizer.
Accompanying drawing 2 is accompanying drawing 1 side view.
Describe working condition of the present invention and concrete enforcement in detail below in conjunction with accompanying drawing
By the next breeze airflow of airduct, behind divergent segment [1], divide upper and lower two strands and stream U-shaped body stabilizer [2], because inertial centrifugal centrifugation, pulverized coal particle in wind breeze airflow is gathering near near the wall of U-shaped body, forms the breeze airflow of one deck high concentration, under the effect of current divider [3], former coal dust air-flow is divided into dense, light each two strands, and two strands of dense air-flows enter respectively in the passage of being made up of U-shaped body wall face and current divider.Current divider can adopt flat board or V shaped slab.For air-flow further being separated and concentrating, venetian blind type can be adopted in the V shaped slab inboard, like this, behind dense breeze airflow admission passage, some gas is separated by shutter again in advancing, thereby the breeze airflow of this burst high concentration further has been concentrated, and finally injects in the stove at a certain angle.Two strands of simultaneously light breeze airflows flow out through the passage of the V-arrangement separator outside and the formation of spout wall.Because deflector [4] is housed on current divider, the air-flow of being separated by shutter after the deflector guiding, in the exit promptly therewith a strand light breeze airflow converge, inject burner hearth then.Upper and lower two strands of light breeze airflows account for the overwhelming majority of a wind air capacity, will form a recirculating zone after streaming stabilizer, and two strands of dense breeze airflows recited above are directly injected in this recirculating zone outside spout.After leaving the spout certain distance, the breeze airflow of these two bursts of high concentrations converges and is one, shortly after that mixes again with upper and lower two strands of light breeze airflows rapidly again.Because the very breeze airflow of high concentration is arranged, be easy to fire burns in the outlet of burner.In case and coal powder ignition burning institute liberated heat will improve the temperature of recirculating zone greatly, the reflux heat flue gas can further heat the coal dust that newly sprays into again conversely, makes it fire burns.Owing in the recirculating zone of burner outlet, promptly there is the breeze airflow of high concentration very that the hot flue gas of coming of backflow is arranged again, breeze airflow is caught fire in advance, burn smoothly and keep flame stabilization.Just sprayed into zone in the stove at two strands of high concentration pulverized coal air-flows, the ratio of oxygen is relatively low, and upper and lower soon after two strands of light breeze airflows and the diffusion of secondary wind are come, and supply with sufficient oxygen, and breeze airflow is burnt rapidly., thin powdered coal air-flow dense by reasonably organizing inject position and direction, outside a wind snout, form the segmentation combustion conditions, promptly form the primary combustion zone and the sufficient intermediate zone of oxygen of anoxycausis.This sectional combustion process will significantly reduce the discharging of boiler NOx.Back-fire side at a wind snout is provided with a high speed winds spout [5] in addition, its inside is provided with a standby steam nozzle [6], its objective is in order to open the high speed winds or the steam of side when the burning low grade coal, to strengthen the circulating flow strength in spout exit, to increase inhaling the hot exhaust gas volumn that the volume burning produces.When using the clinker(ing) coal kind, side wind also has the function of the slagging scorification of preventing.
Claims (4)
1, a kind of straight-through pulverized coal burner that has flame stabilizer, its flame stabilizer is installed in wind snout inside one time, it is characterized in that the combined combustion stabilizer that this flame stabilizer is made up of a U type body stabilizer [2] and two current dividers [3].
2,, it is characterized in that described current divider is flat board or V shaped slab according to the described straight-through pulverized coal burner of claim 1.
3,, it is characterized in that described V shaped slab inboard is venetian blind type according to the described straight-through pulverized coal burner of claim 2.
4, according to the described straight-through pulverized coal burner of claim 1, it is characterized in that being provided with a high speed winds spout [5] at the back-fire side of a wind snout, its inside is provided with a steam nozzle [6].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100588 CN1043169C (en) | 1992-01-31 | 1992-01-31 | Direct-flow coal-powder burner with combined combustion stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100588 CN1043169C (en) | 1992-01-31 | 1992-01-31 | Direct-flow coal-powder burner with combined combustion stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1074993A true CN1074993A (en) | 1993-08-04 |
| CN1043169C CN1043169C (en) | 1999-04-28 |
Family
ID=4938693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92100588 Expired - Fee Related CN1043169C (en) | 1992-01-31 | 1992-01-31 | Direct-flow coal-powder burner with combined combustion stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043169C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011134388A1 (en) * | 2010-04-27 | 2011-11-03 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and pulverized coal boiler having it |
| CN105351921A (en) * | 2015-12-09 | 2016-02-24 | 江苏东方电力锅炉配件有限公司 | Firing stabilizer |
| CN110043898A (en) * | 2019-04-10 | 2019-07-23 | 清华大学 | Multistage reflux reverse spray type vortex burner |
| CN111520709A (en) * | 2020-04-10 | 2020-08-11 | 王德志 | Novel direct-current pulverized coal burner capable of stabilizing flame |
| CN112128748A (en) * | 2020-10-16 | 2020-12-25 | 西安热工研究院有限公司 | Brown coal pulverized coal burner with wedge-shaped oxygen supplementing device |
-
1992
- 1992-01-31 CN CN 92100588 patent/CN1043169C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011134388A1 (en) * | 2010-04-27 | 2011-11-03 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and pulverized coal boiler having it |
| US8950345B2 (en) | 2010-04-27 | 2015-02-10 | Yantai Longyuan Power Technology Co., Ltd. | Pulverized coal burner and pulverized coal boiler having it |
| CN105351921A (en) * | 2015-12-09 | 2016-02-24 | 江苏东方电力锅炉配件有限公司 | Firing stabilizer |
| CN110043898A (en) * | 2019-04-10 | 2019-07-23 | 清华大学 | Multistage reflux reverse spray type vortex burner |
| CN110043898B (en) * | 2019-04-10 | 2020-02-21 | 清华大学 | Multi-stage backflow reverse-spraying type cyclone pulverized coal burner |
| CN111520709A (en) * | 2020-04-10 | 2020-08-11 | 王德志 | Novel direct-current pulverized coal burner capable of stabilizing flame |
| CN112128748A (en) * | 2020-10-16 | 2020-12-25 | 西安热工研究院有限公司 | Brown coal pulverized coal burner with wedge-shaped oxygen supplementing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043169C (en) | 1999-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100491821C (en) | Dense-phase back-flushing multiple level NOx combustion method | |
| CN209655299U (en) | A kind of ultra-low nitrogen volumetric combustion device | |
| CN202546811U (en) | Compound furnace arch and compound secondary air structure | |
| CN202884901U (en) | Boiler capable of realizing reignition of exhaust gas coal powder by using high-temperature flue gas and reducing NOx | |
| CN1043169C (en) | Direct-flow coal-powder burner with combined combustion stabilizer | |
| CN204593369U (en) | The tertiary air of pulverized-coal fired boiler is made into the device that First air carries out burning | |
| CN111947136B (en) | Combustion method of W flame boiler with flexible peak regulation and self-stabilization combustion performance | |
| CN102927560B (en) | Low-NOX air-coal-powder optimized burner group | |
| CN205227306U (en) | Deep or light hierarchical buggy low NOx burner | |
| CN203907595U (en) | Boiler | |
| CN2387392Y (en) | Graded burning coal powder burner | |
| CN203036634U (en) | Fractional combustion low-nitrogen oxide rotational flow burner | |
| CN202902262U (en) | Low NOX pulverized-coal optimized combustor unit | |
| CN102679390A (en) | Compound furnace arch and compound secondary air structure for cooperatively controlling generation of nitrogen oxide (NOX) | |
| CN2432448Y (en) | Energy-saving environmental protection straight-flow coal powder burner | |
| CN103672863B (en) | The using method of the low nitrogen combustion apparatus of middle warehouse formula pulverized coal carried by hot air boiler | |
| CN2235065Y (en) | Burner for pulverized coal | |
| CN1407274A (en) | Coal powder direct supplying burner | |
| CN204629462U (en) | A kind of water-coal-slurry low-nitrogen burning injection boiler | |
| CN2293718Y (en) | Large range variable loading concentrated & dilute phase pulverized coal combustor | |
| CN209084751U (en) | A kind of controllable coal burner of ignition heat | |
| CN2319694Y (en) | Adjusting thick/thin powdered coal burner | |
| CN85100045B (en) | Pulverized coal pre-combustion chamber burner with root secondary air | |
| CN208418735U (en) | It can be used for biomass or coal dust can be across the low-NOx combustor of Load Regulation | |
| CN207247187U (en) | A kind of four arch form opens the W type flame boilers of double-deck burnout degree |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |