CN2293718Y - Large range variable loading concentrated & dilute phase pulverized coal combustor - Google Patents
Large range variable loading concentrated & dilute phase pulverized coal combustor Download PDFInfo
- Publication number
- CN2293718Y CN2293718Y CN 97211769 CN97211769U CN2293718Y CN 2293718 Y CN2293718 Y CN 2293718Y CN 97211769 CN97211769 CN 97211769 CN 97211769 U CN97211769 U CN 97211769U CN 2293718 Y CN2293718 Y CN 2293718Y
- Authority
- CN
- China
- Prior art keywords
- dilute phase
- concentrated
- phase
- dense
- dense dilute
- 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.)
- Expired - Fee Related
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- 239000003245 coal Substances 0.000 title claims abstract description 37
- 239000000843 powder Substances 0.000 claims description 18
- 230000008676 import Effects 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract 3
- 238000004939 coking Methods 0.000 abstract 1
- 239000002817 coal dust Substances 0.000 description 5
- 230000036651 mood Effects 0.000 description 5
- 230000003134 recirculating effect 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
- 238000010438 heat treatment Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Abstract
The utility model discloses a large range variable loading concentrated and dilute phase pulverized coal combustor, which is orderly composed of a primary air pulverized coal pipe, a primary air bend pipe, a concentrated and dilute phase separator for air currents of pulverized coal, a dilute phase primary air pipe, and a concentrated phase primary air pipe, wherein, a wedge-shaped concentrated and dilute phase separating baffle is arranged in the centre of the inlet cross-section of the pulverized coal current concentrated and dilute phase separator which is divided into a concentrated phase separating channel and a dilute phase separating channel by the wedge-shaped concentrated and dilute phase separating baffle, and the concentrated phase separating channel and the dilute phase separating channel are connected smoothly with the concentrated phase primary air pipe and the dilute phase primary air pipe respectively. The utility model has the advantages that the range of load regulation is wide, the coal variety adaptability is strong, the heat nitrogen oxides content is low, the spout of the combustor is non-burnout and non-coking, etc.
Description
The utility model relates to burner, relates in particular to wide range, varying duty, dense dilute phase coal powder burner.
Along with the variation of development and national economy and power structure, the peak valley of power load increases day by day; In addition because improving constantly to environmental requirement, control strictly more to the discharge standard of coal-fired boiler NOx, and the coal burner ubiquity load regulation range of present domestic use is little, problems such as coal adaptability difference, and boiler can not satisfy the requirement of present peak load regulation network and coal variation; More do not know where to begin for low NOx combustion.Given this, develop a kind of load of can wide range regulating, low NOx drainage, the wide coal powder burner of coal adaptability is very urgent.
The purpose of this utility model provides a kind of wide range, varying duty, dense dilute phase coal powder burner.
The utility model is taked following measures in order to achieve the above object: wide range, varying duty, dense dilute phase coal powder burner, it has the wind coal pipe one time, and link to each other with the dense dilute phase separator of breeze airflow, the dense dilute phase separator of breeze airflow links to each other with airduct of airduct of concentrated phase and dilute phase respectively, airduct of concentrated phase links to each other with the concentrated phase spout, concentrated phase spout center is provided with the taper combustion stabilizing body, airduct of concentrated phase is provided with the circumference secondary air channel outward, with circumference secondary air channel spout, the circumference secondary air channel links to each other with circumference secondary air channel air door, it is characterized in that being connected to the windbend pipe one time between wind coal pipe and the dense dilute phase separator of breeze airflow, the dense dilute phase separator of breeze airflow is a branch pipe type, the import of the dense dilute phase separator of breeze airflow links to each other with a windbend pipe, be provided with the dense dilute phase of wedge shape in the middle of the dense rare import of the dense dilute phase separator of breeze airflow and separate dividing plate, separate dividing plate through the dense dilute phase of wedge shape and be separated into concentrated phase split tunnel and dilute phase split tunnel, the concentrated phase split tunnel smoothly connects to the concentrated phase pipe, and the dilute phase split tunnel smoothly connects to the dilute phase pipe.
It is big to the utlity model has load regulation range, and coal adaptability is strong, and heating power NOx content is low, and burner nozzle does not burn out, advantages such as noncoking.
Elaborate below in conjunction with accompanying drawing.
Fig. 1 is wide range, varying duty, dense dilute phase coal powder burner structural representation;
Fig. 2 is the dense dilute phase cyclone separator arrangement of a breeze airflow schematic diagram;
Fig. 3 is the dense dilute phase cyclone separator arrangement of a Fig. 2 breeze airflow left view.
Wide range, varying duty, dense dilute phase coal powder burner, it has wind coal pipe 1 one time, and link to each other with the dense dilute phase separator 3 of breeze airflow, the dense dilute phase separator of breeze airflow links to each other with airduct 5 of airduct 4 of concentrated phase and dilute phase respectively, airduct of concentrated phase links to each other with concentrated phase spout 7, concentrated phase spout center is provided with taper combustion stabilizing body 6, airduct of concentrated phase is provided with circumference secondary air channel 10 outward, with circumference secondary air channel spout 11, the circumference secondary air channel links to each other with circumference secondary air channel air door 9, feature is to be connected to windbend pipe 2 one time between wind coal pipe and the dense dilute phase separator of breeze airflow, the dense dilute phase separator of breeze airflow is a branch pipe type, the dense dilute phase import of the dense dilute phase separator of breeze airflow links to each other with a windbend pipe, is provided with the dense dilute phase of wedge shape in the middle of the import of the dense dilute phase separator of breeze airflow and separates dividing plate 14, separates dividing plate through the dense dilute phase of wedge shape and is separated into concentrated phase split tunnel 13 and dilute phase split tunnel 12, the concentrated phase split tunnel smoothly connects to the concentrated phase pipe, and the dilute phase split tunnel smoothly connects to the dilute phase pipe.
The dense dilute phase separator of breeze airflow import section A/B=0.49～1.2mm.The dense dilute phase separator of breeze airflow length L
1=300～1200mm.The dense dilute phase separator of breeze airflow import kernel of section is put to separator dilute phase split tunnel outlet central point vertical, horizontal range L
2, L
3, separator concentrated phase split tunnel outlet central point is to the dense dilute phase separator of breeze airflow import kernel of section point distance L
4Be respectively 0～500mm.Distance L between taper combustion stabilizing body end face and the concentrated phase nozzle exit
5, the distance L between concentrated phase nozzle exit and the circumference overfire air port cross section
6Be respectively the premix section of 0～400mm.The radian measure alpha of a windbend pipe=60～135 °.Concentrated phase spout half-angle α
2, circumference overfire air port half-angle α
3, tapered centre combustion stabilizing body half-angle α
1Be respectively 0～30 °.The dense dilute phase separator of breeze airflow import cross section equivalent diameter d
1=200～550mm, the dense dilute phase of the dense dilute phase separator of breeze airflow outlet equivalent diameter d
3, d
2Be 150～400mm.
During the work of this device, when wind wind powder mixture was entered radian and is windbend pipe of α by an airduct, because action of centrifugal force, coal dust focused on the outside of bend pipe.Utilize this principle, after bend pipe turns over the α angle, make a general mood dense dilute phase separator of flowing through, a large amount of coal dusts and part air are from concentrated phase import section A (circle lacks or the square type), enter the concentrated phase split tunnel, after concentrated phase split tunnel outlet (circle or square type), smoothly enter airduct of concentrated phase again.A spot of coal dust and part air enter the dilute phase split tunnel from dilute phase import cross section B (circle lacks or the square type), enter the dilute phase pipe smoothly again after dilute phase split tunnel dilute phase outlet (circle or square type).Coal dust amount concentrated phase after the separation is 81～92%, and dilute phase is 8～19%; The air quantity concentrated phase is 33～60%, and dilute phase is 40～67%.Like this, make the coal powder density of a general mood stream of burner concentrated phase spout be controlled at 0.8～1.2kg coal dust/kg air, make coal dust energy stable ignition, efficient burning according to different coals.
Wind of dense dilute phase after dense dilute phase separator separates enters dense dilute phase spout.Dense dilute phase spout arranges that respectively the concentrated phase spout is in last (or down).
The enlarging of concentrated phase spout and tapered centre combustion stabilizing body cooperate with the circumference overfire air port can form the recirculating zone, center effectively, guarantees the breeze airflow needed heat that catches fire.During underload, circumference secondary wind turns down, and utilizes enlarging and taper combustion stabilizing body that jet recirculating zone and spread angle of jet are increased, and the high-temperature flue gas amount of entrainmenting of heating breeze airflow is increased; Simultaneously, the recirculating zone, center of increase makes flame more stable; In addition, utilize the few advantage of the concentrated phase high required ignition heat of general mood stream coal powder density, guarantee breeze airflow stable ignition burning when underload; During high load capacity, circumference secondary wind is opened greatly, utilizes the rigidity of high speed circumference secondary wind that general mood stream of concentrated phase is restored to the original state, and postponement is caught fire, the protection spout; The rapid mixing of a general mood stream of high speed circumference secondary wind and concentrated phase also can play rapid aftercombustion requisite oxygen amount.Utilize the aperture difference of circumference secondary wind, make boiler, align ignition point according to combustion position during different coal at different load, make breeze airflow normal fire burns.In addition, the different proportionings of wind of concentrated phase and circumference direct current secondary wind can realize air stage feeding effectively, reduce the content of NOx in the flue gas.
This burner adapts to various coals of different nature, and the scope that boiler is not thrown oily stable ignition is 30～100% of a boiler rated load.
This burner adapts to four jiaos of DC burner pulverized-coal fired boilers of arranging.
Claims (8)
1. wide range, varying duty, dense dilute phase coal powder burner, it has a wind coal pipe [1], and link to each other with the dense dilute phase separator of breeze airflow [3], the dense dilute phase separator of breeze airflow links to each other with an airduct of an airduct of concentrated phase [4] and dilute phase [5] respectively, airduct of concentrated phase links to each other with concentrated phase spout [7], concentrated phase spout center is provided with taper combustion stabilizing body [6], airduct of concentrated phase is provided with circumference secondary air channel [10] outward, with circumference secondary air channel spout [11], the circumference secondary air channel links to each other with circumference secondary air channel air door [9], it is characterized in that being connected to a windbend pipe [2] between wind coal pipe and the dense dilute phase separator of breeze airflow, the dense dilute phase separator of breeze airflow is a branch pipe type, the import of the dense dilute phase separator of breeze airflow links to each other with a windbend pipe, be provided with the dense dilute phase of wedge shape in the middle of the import of the dense dilute phase separator of breeze airflow and separate dividing plate [14], separate dividing plate through the dense dilute phase of wedge shape and be separated into concentrated phase split tunnel [13] and dilute phase split tunnel [12], the concentrated phase split tunnel smoothly connects to the concentrated phase pipe, and the dilute phase split tunnel smoothly connects to the dilute phase pipe.
2. a kind of wide range according to claim 1, varying duty, dense dilute phase coal powder burner is characterized in that the dense dilute phase separator of said breeze airflow import section A/B=0.49～1.2mm.
3. a kind of wide range according to claim 1 and 2, varying duty, dense dilute phase coal powder burner is characterized in that the dense dilute phase separator of breeze airflow length L
1=300～1200mm.
4. a kind of wide range according to claim 1 and 2, varying duty, dense dilute phase coal powder burner is characterized in that the dense dilute phase separator of breeze airflow import kernel of section point is vertical to separator dilute phase split tunnel outlet central point, horizontal range L
2, L
3, separator concentrated phase split tunnel outlet central point is to the dense dilute phase separator of breeze airflow import kernel of section point distance L
4Be respectively 0～500mm.
5. a kind of wide range according to claim 1 and 2, varying duty, dense dilute phase coal powder burner is characterized in that the distance L between taper combustion stabilizing body end face and the concentrated phase nozzle exit
5, the distance L between concentrated phase nozzle exit and the circumference overfire air port cross section
6Be respectively the premix section of 0～400mm.
6. a kind of wide range according to claim 1 and 2, varying duty, dense dilute phase coal powder burner is characterized in that radian measure alpha=60～135 ° of a said windbend pipe.
7. a kind of wide range according to claim 1 and 2, varying duty, dense dilute phase coal powder burner is characterized in that said concentrated phase spout half-angle α
2, circumference overfire air port half-angle α
3, tapered centre combustion stabilizing body half-angle α
1Be respectively 0～30 °.
8. a kind of wide range according to claim 1 and 2, varying duty, dense dilute phase coal powder burner is characterized in that the dense dilute phase separator of said breeze airflow import cross section equivalent diameter d
1=200～550mm, the dense dilute phase of the dense dilute phase separator of breeze airflow outlet equivalent diameter d
3, d
2Be 150～400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97211769 CN2293718Y (en) | 1997-03-12 | 1997-03-12 | Large range variable loading concentrated & dilute phase pulverized coal combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97211769 CN2293718Y (en) | 1997-03-12 | 1997-03-12 | Large range variable loading concentrated & dilute phase pulverized coal combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2293718Y true CN2293718Y (en) | 1998-10-07 |
Family
ID=33930174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97211769 Expired - Fee Related CN2293718Y (en) | 1997-03-12 | 1997-03-12 | Large range variable loading concentrated & dilute phase pulverized coal combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2293718Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200278A (en) * | 2011-05-10 | 2011-09-28 | 华中科技大学 | Direct flow coal powder burner equipped with coal powder distributor |
| CN102997232A (en) * | 2012-12-26 | 2013-03-27 | 内蒙古科技大学 | Anti-coking type direct current pulverized coal burner |
| CN103196146A (en) * | 2013-04-07 | 2013-07-10 | 山东大学 | Paper mill sludge combustion device and technique capable of preventing slag-bonding and corrosion of water walls |
| CN109020267A (en) * | 2018-10-17 | 2018-12-18 | 中冶长天国际工程有限责任公司 | A kind of pulverized coal gun device, low NOx lime generation equipment and its control method |
-
1997
- 1997-03-12 CN CN 97211769 patent/CN2293718Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200278A (en) * | 2011-05-10 | 2011-09-28 | 华中科技大学 | Direct flow coal powder burner equipped with coal powder distributor |
| CN102200278B (en) * | 2011-05-10 | 2012-05-09 | 华中科技大学 | Direct flow coal powder burner equipped with coal powder distributor |
| CN102997232A (en) * | 2012-12-26 | 2013-03-27 | 内蒙古科技大学 | Anti-coking type direct current pulverized coal burner |
| CN103196146A (en) * | 2013-04-07 | 2013-07-10 | 山东大学 | Paper mill sludge combustion device and technique capable of preventing slag-bonding and corrosion of water walls |
| CN103196146B (en) * | 2013-04-07 | 2015-08-12 | 山东大学 | A kind of paper mill sludge burner and technique preventing water-cooling wall slagging scorification and corrosion |
| CN109020267A (en) * | 2018-10-17 | 2018-12-18 | 中冶长天国际工程有限责任公司 | A kind of pulverized coal gun device, low NOx lime generation equipment and its control method |
| CN109020267B (en) * | 2018-10-17 | 2021-10-26 | 中冶长天国际工程有限责任公司 | Pulverized coal spray gun device, low NOx lime production equipment and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |