CN85109436B - Burner using coal powder with fire stabilizer - Google Patents
Burner using coal powder with fire stabilizer Download PDFInfo
- Publication number
- CN85109436B CN85109436B CN85109436A CN85109436A CN85109436B CN 85109436 B CN85109436 B CN 85109436B CN 85109436 A CN85109436 A CN 85109436A CN 85109436 A CN85109436 A CN 85109436A CN 85109436 B CN85109436 B CN 85109436B
- Authority
- CN
- China
- Prior art keywords
- pulverized coal
- burner
- flameholder
- boat
- ship
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
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- 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 direct current pulverized coal burner with a flame stabilizing boat, which is a combustion device on pulverized coal combustion equipment. The present invention is characterized in that the flame stabilizing boat is additionally arranged at the pulverized coal air stream nozzle of the direct current pulverized coal burner, and steam or compressed air streams are respectively ejected from the end parts of the prow and the stern of the boat and from the circular seam of a central pipe at the bottom of the boat. The present invention is a multifunctional direct current pulverized coal burner due to the special structural shape of the burner and has the functions of pulverized coal precombustion chambers, and a large amount of ignition and combustion supporting oil can be saved. The present invention can also continuously operate for a long term as a main burner and has the advantages of convenient use and stable combustion when actual coal quality frequently changes.
Description
The present invention relates to a kind of straight-through pulverized coal burner that has flameholder, straight-through pulverized coal burner is put at particularly a kind of angle that has flameholder.
In the prior art, adopt the pulverized-coal fired boiler of general direct-flow pulverized coal combustion technology, when the igniting kindling, generally all will burn a large amount of oil earlier, just can make the coal dust firing that sprays into stable then.In addition, because general pulverized-coal fired boiler is lower than at 70% o'clock at load, burning can be unstable, in order to keep smooth combustion under the underload, also must spray into the considerable fuel oil that helps.(see " the steady combustion theory and the analysis of experiments of bluff body " year " power engineering " 83 years the 6th phases.) bluff body flameholder column triangular in shape, be installed in the outer combustion chamber of wind snout, more inflammable bad.Another kind of novel flameholder is a THE BARCHAN DUNE VORTEX BD type generator, sees (Engineering Thermophysics journal, 82 years the 1st phases), and it is used in gas and the fluid combustion chamber, is not a kind of pulverized coal flame stabilizer.Will burn if be contained in the pulverized coal combustor.
The objective of the invention is to be pulverized-coal fired boiler, particularly the angle is put direct-flow pulverized coal combustion equipment a kind of multi-functional straight-through pulverized coal burner is provided, make it to have concurrently the function of coal dust precombustion chamber, both can save a large amount of igniting and help fuel oil, again can be as the long-term operation continuously of main burner, and it is changeable to adapt to coal, keeps flameholding.
The present invention is achieved in that in breeze airflow (i.e. wind) spout at straight-through pulverized coal burner and adorns a flameholder, this flameholder is ship shape, form by the hull bottom and the side of a ship and the central tube that has a torch oil gun, and on the bow, respectively there is a jet-stream wind spout at the circumferential weld place that stern and central tube and oil gun form, because the special version of flameholder, add the expulsion pressure and the flow of three strands of air-flows of suitable adjusting, just form suitable pulverized coal concentration field after can making coal dust air two phase flow stream this hull, air-flow field and temperature field, make regional area form the stable ignition source of breeze airflow of igniting, thereby achieve the above object.
The advantage that has the straight-through pulverized coal burner of ship shape flameholder is: (1) is simple in structure, installs and change hull conveniently, does not generally need the layout of boiler water-wall tube is done very big change, can put on the coal powder direct supplying combustion apparatus at the angle widely and adopt.(2) because the special planform of flameholder, it can not only make regional area in the breeze airflow outer rim of ejaculation become the stable ignition source of the breeze airflow that ignites, and by suitable utilization to three strands of air-flows, can also regulate position, size and the temperature in the stable ignition source of the breeze airflow that ignites, adapt to the coal-fired variation of planting of boiler institute and institute and require the change of loading thereby reach, the while, these three strands of jet-stream winds played good cooling effect to hull and spout.(3) can be used as the long-term operation continuously of main burner and replace original straight-through pulverized coal burner, have the function of precombustion chamber again, thereby can save a large amount of igniting and help fuel oil, economy, obvious technical effects.
Describe concrete structure of the present invention and working condition in detail below in conjunction with accompanying drawing:
Fig. 1 is a structural representation of the present invention
Fig. 2 is the front view of Fig. 1
The present invention mainly is made up of burner nozzle (1) and the ship shape flameholder (2) that is contained in the spout.This ship is by hull bottom (3), and the side of a ship (4), (5) and the central tube that has torch oil gun (6) that is contained in the hull bottom centre are formed.Hull bottom is a curved surface, and the side of a ship is plane or curved surface.On the bow the end with stern has slit shape spout (7) and (8) respectively, and introduces steam or compressed air by special pipeline to spout, makes it to spray into the combustion chamber.Circumferential weld (9) around the central tube of central part also has the ejection of steam or compressed air stream alow.The air-flow that contains coal dust penetrates from spout (1), after streaming this hull, the reflux gas temperature that forms is not really high, also not directly with the reflux gas coal dust that ignites, but after penetrating spout, the outer rim of the breeze airflow outside the recirculating zone forms local high coal powder density, favourable oxygen concentration and high-temperature area, forms the good ignition source of the stable breeze airflow that ignites.The expulsion pressure and the flow of three strands of air-flows that adjusting is sent into via fore, stern and central tube circumferential weld just can be controlled position, size and the temperature of this ignition source.
Claims (3)
1, a kind of straight-through pulverized coal burner that has flameholder, straight-through pulverized coal burner is put at particularly a kind of angle that has flameholder, it is characterized in that this flameholder is ship shape, place straight-through pulverized coal burner breeze airflow spout inside, this ship shape flameholder is made up of hull bottom, the side of a ship and the central tube that has a torch oil gun, on the bow, respectively there is the spout of a jet-stream wind at stern and central tube circumferential weld place.
2, according to the described straight-through pulverized coal burner of claim 1, it is characterized in that the air-flow spout (7) of the forward andor aft of above-mentioned ship shape flameholder, (8) are slit shape, central tube place air-flow spout (9) is a circumferential weld shape.
3, according to claim 1,2 described straight-through pulverized coal burners, the hull bottom that it is characterized in that the flame stabilization ship is a curved surface, the side of a ship is plane or curved surface.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109436A CN85109436B (en) | 1985-12-31 | 1985-12-31 | Burner using coal powder with fire stabilizer |
| DE19868634905 DE8634905U1 (en) | 1985-12-31 | 1986-12-31 | |
| GB8631080A GB2186070B (en) | 1985-12-31 | 1986-12-31 | Direct-flow pulverized coal burner with flame stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109436A CN85109436B (en) | 1985-12-31 | 1985-12-31 | Burner using coal powder with fire stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85109436A CN85109436A (en) | 1987-07-08 |
| CN85109436B true CN85109436B (en) | 1988-04-13 |
Family
ID=4796327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85109436A Expired CN85109436B (en) | 1985-12-31 | 1985-12-31 | Burner using coal powder with fire stabilizer |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN85109436B (en) |
| DE (1) | DE8634905U1 (en) |
| GB (1) | GB2186070B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI124635B (en) * | 2008-04-14 | 2014-11-14 | Heiko Romu | Low-energy fireplace heater |
-
1985
- 1985-12-31 CN CN85109436A patent/CN85109436B/en not_active Expired
-
1986
- 1986-12-31 DE DE19868634905 patent/DE8634905U1/de not_active Expired
- 1986-12-31 GB GB8631080A patent/GB2186070B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85109436A (en) | 1987-07-08 |
| DE8634905U1 (en) | 1987-04-09 |
| GB8631080D0 (en) | 1987-02-04 |
| GB2186070B (en) | 1989-11-01 |
| GB2186070A (en) | 1987-08-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |