CN1019852B - The coal burner of band multiply awl seperating device - Google Patents
The coal burner of band multiply awl seperating deviceInfo
- Publication number
- CN1019852B CN1019852B CN90104490A CN90104490A CN1019852B CN 1019852 B CN1019852 B CN 1019852B CN 90104490 A CN90104490 A CN 90104490A CN 90104490 A CN90104490 A CN 90104490A CN 1019852 B CN1019852 B CN 1019852B
- Authority
- CN
- China
- Prior art keywords
- burner
- coal
- awl
- multilayer
- cone sheets
- 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
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Abstract
The band multiply awl seperating device coal burner, be a kind of burner on the spiral-flow powdered coal burning equipment.Be characterized in a wind snout of vortex burner.Install multilayer awl coal dust disconnecting gear [3] additional, this device is made up of one group of multilayer cone sheets, and every layer of cone sheets and burner central axis are angled.This invention not only has the function of coal dust precombustion chamber, and promptly save a large amount of igniting and help fuel oil, and can be as the long-term operation continuously of main burner, not accumulated powder, not slagging scorification; When load and ature of coal variation, keep flameholding.Simultaneously, also have processing, installation, change advantages such as convenient, the spout of existing vortex burner, pipeline etc. are not done change basically can use.
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 spiral-flow powdered coal burning equipment.
In the prior art, adopt the pulverized-coal fired boiler of general spiral-flow powdered coal burning technology, during kindling, generally all will burn a large amount of oil earlier, the combustion chamber is fully heated, just can stop oil firing after making coal dust smooth combustion in igniting.In addition, general pulverized-coal fired boiler is when loading lower or ature of coal variation, and burning can be unstable, in this case, in order to keep coal dust smooth combustion, also must spray into a certain amount of fuel oil that helps.For addressing the above problem, the various cylinder type coal dust pre-combustion chamber burners that development in recent years is got up, it can open, stop or improve the stability of boiler combustion during underload at boiler, saves to light a fire in a large number and help fuel oil.But this pre-combustion chamber burner is when long-time running, accumulated powder and slagging scorification in the pre-burning tube easily, even burn out the pre-burning tube because of local temperature is too high.So present this burner can only be as the smooth combustion of when igniting, and inapplicable as long-term underload main burner combustion-supporting or continuous operation.For overcoming accumulated powder and slagging scorification problem, Chinese patent 85100045 " the coal dust pre-combustion chamber burner of band root secondary wind ", be on the basis of former coal dust burn-off chamber burner, to have set up adherent annular secondary wind structure, when combustion-supporting or main burner uses as long-term underload, though can partly reduce accumulated powder and slagging scorification in the pre-burning tube, because a considerable amount of charcoal particles at the pre-burning cylinder roasting, cause an interior temperature very high, during long-time running, accumulated powder and slagging scorification can not fundamentally be eliminated fully.
Chinese patent 85109436 " coal burner of band ship shape flameholder " is a kind of multifunction coal dust combustor, it had both had the function of coal dust precombustion chamber concurrently, can make burner body keep stable as the long-term operation continuously of main burner again, but it and be not suitable for spiral-flow powdered coal burning equipment.
The objective of the invention is provides a kind of coal burner with multiply awl seperating device for spiral-flow powdered coal burning equipment, make it not only to have the function (i.e. saving is lighted a fire in a large number and helped fuel oil) of coal dust precombustion chamber concurrently but also can move continuously as main burner is long-term, and it is changeable to adapt to coal, keeps flameholding.
The present invention is achieved in that in breeze airflow (wind) spout [1] at vortex burner, install a multilayer awl coal dust disconnecting gear [3] additional in oil gun central tube [2] outside, this device is made up of one group of multilayer cone sheets, every layer diameter flows to Inbound successively from large to small along a general mood, and every layer of cone sheets and burner central axis are angled.This angle can be fixed also and can be regulated, when breeze airflow process multilayer cone sheets, owing to act in the disjoint set of cone sheets to pulverized coal particle, high concentration pulverized coal air-flow outside the central tube is under burner secondary general mood stream and the guiding than short cylinder wall, in backflowing the localized high temperature regions of distinguishing, the burner center forms the coal dust of high concentration, make it to become the stable ignition source of breeze airflow of igniting, thereby make coal dust keep smooth combustion.
The present invention compared with prior art has the following advantages and good effect: (1) is simple in structure, multilayer cone sheets processing, install, change convenient, the spout of the turbulent burner on the existing spiral-flow powdered coal burning equipment, pipeline etc. are not done basically to change and can be adopted.(2) owing to act in the disjoint set of multilayer cone sheets to coal dust, can form the stable ignition source of the breeze airflow that ignites at the regional area in being backflowed in the district at the center of coal burner, when boiler startup, use the small oil gun in the central tube can save ignition oil, thereby have the partial function of coal dust precombustion chamber.(3) by regulating the swirl strength of secondary wind, can regulate the position and the ignition condition of ignition source; And owing to adopt short barrel, flame is mainly burnt outside burner, thereby keep not slagging scorification in the tube, move stably in a long term so can be used as the coal dust main burner; When load and ature of coal variation, also can keep smooth combustion.(4) coal dust keeps higher concentration in the stage of catching fire, and helps reducing NO
XGeneration and reduce NO in the flue gas
XDischarging; Behind coal powder ignition, have and promptly to mix, can reduce the heat loss of uncompleted burned carbon with the air that enters subsequently.
Accompanying drawing is a structural representation of the present invention.
Describe concrete structure of the present invention and enforcement in detail below in conjunction with accompanying drawing.
The present invention mainly is by breeze airflow spout (i.e. wind snout) [1], oil gun central tube [2], multilayer awl coal dust disconnecting gear [3], burner nozzle reamer section [4], secondary air chamber [5], adherent annular overfire air port [6] and burner cylindrical section [7] are formed.Multilayer awl coal dust disconnecting gear [3] is made up of one group of multilayer cone sheets, every layer diameter flows to Inbound successively from large to small along a general mood, and every layer of cone sheets can become 15 °-35 ° with the angle of burner central axis, and this angle can be regulated according to different situations.When coal dust and AIR MIXTURES flowed into multilayer awl coal dust disconnecting gear by a wind snout, because the separation of cone sheets and concentrate effect, the air-flow that coal powder density is big will be along the circular passage ejection near the central tube outside, the district of backflowing, the center of entering.This center backflow the district be under the effect of burner cylindrical section [7] and adherent annular secondary wind [6] formation.The oxygen concentration that the flue gas in district has higher temperature and is fit to owing to backflow in the center, the high concentration pulverized coal that enters this district make it to become the stable ignition source of breeze airflow of igniting.The distance between angle, cone sheets and the cone sheets between adjusting cone sheets and the central axis and the swirl strength of adherent annular secondary wind, position, size and the temperature that can regulate this ignition source.At cylinder roasting, make an interior temperature too high for fear of a considerable amount of charcoal particles, cause accumulated powder and slagging scorification, burner cylindrical section [7] should do shortlyer, the ratio of its tube length L and inside diameter D is 0.2～0.6 to be advisable.Adherent annular secondary wind sprays into along the internal face of tube, can be eddy flow, also can be direct current.During for eddy flow, its swirl strength can be regulated with existent method.
Claims (3)
1, a kind of by a wind snout [1], oil gun central tube [2], burner nozzle reamer section [4], adherent annular secondary wind [6], the vortex burner that parts such as burner drum diameter D and tube length L are formed, it is characterized in that in wind snout, install a multilayer awl coal dust disconnecting gear [3] additional in the oil gun central tube outside, this device is made up of one group of multilayer cone sheets, every layer diameter flows to Inbound successively from large to small along a general mood, and every layer of cone sheets and burner central axis are angled.
2,, it is characterized in that the every layer of cone sheets of described multiply awl seperating device and the angle of central axis are 15 °-35 ° according to the described vortex burner of claim 1.
3,, it is characterized in that burner drum length L and the ratio of its inside diameter D are 0.2-0.6 according to claim 1 or 2 described vortex burners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90104490A CN1019852B (en) | 1990-06-21 | 1990-06-21 | The coal burner of band multiply awl seperating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90104490A CN1019852B (en) | 1990-06-21 | 1990-06-21 | The coal burner of band multiply awl seperating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057711A CN1057711A (en) | 1992-01-08 |
| CN1019852B true CN1019852B (en) | 1992-12-30 |
Family
ID=4878585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90104490A Expired CN1019852B (en) | 1990-06-21 | 1990-06-21 | The coal burner of band multiply awl seperating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019852B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920382B (en) * | 2006-09-04 | 2011-07-20 | 东方锅炉（集团）股份有限公司 | Rotational flow pulverized coal burner |
| CN103988019A (en) * | 2011-11-25 | 2014-08-13 | Fl史密斯公司 | Cyclone burner with conical combustion chamber |
| CN103123113A (en) * | 2013-01-24 | 2013-05-29 | 孙公钢 | Double-rotational-flow industrial boiler pulverized coal burner with back-blowing device |
-
1990
- 1990-06-21 CN CN90104490A patent/CN1019852B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1057711A (en) | 1992-01-08 |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| 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 |