CN87102139A - Baised jet flame stabilizing method and device thereof - Google Patents
Baised jet flame stabilizing method and device thereof Download PDFInfo
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- CN87102139A CN87102139A CN 87102139 CN87102139A CN87102139A CN 87102139 A CN87102139 A CN 87102139A CN 87102139 CN87102139 CN 87102139 CN 87102139 A CN87102139 A CN 87102139A CN 87102139 A CN87102139 A CN 87102139A
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- combustion chamber
- spout
- fuel
- baised
- combustion
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Abstract
The invention discloses a kind of method and apparatus that can stablize with overheavy firing.It is utilize air fuel mixture with the certain speed off-axis spray into the combustion chamber, make at the big high temperature recirculation zone of burning indoor production one, light the fuel that directly falls into wherein.Burner is made up of combustion chamber and the biasing spout that is positioned at the chamber front end face.Spout is placed in half above one of front end face central axis.
Description
The present invention relates to a kind of method and apparatus of the stable and overheavy firing to gas phase fuel, liquid mist fuel, powdered fuel flame.
Existing flame stabilizing method and device thereof have three kinds of forms: a) swirl flame stabilising arrangement.Air and ignition mixture enter the combustion chamber through cyclone, the high temperature recirculation zone that is formed centrally in leaning on is lighted fresh flammable mixture, its shortcoming is that the recirculating zone is less, retention flame ability, the fuel that enters the combustion chamber through eddy flow can not directly enter the high-temperature region, and get rid of, if coal dust, then easily coking to wall.Simultaneously, there is the spinning disk wear problem.B) bluff body flameholder.Air and fuel mixture stream bluff body, and the high temperature recirculation zone that leans against the formation of bluff body afterbody is lighted fresh flammable mixture.Shortcoming is that the recirculating zone is less, and fuel can not directly enter the recirculating zone, and the flame stabilization ability is relatively poor.Because fuel strikes on the bluff body, make incomplete combustion simultaneously, easy coking or accumulated powder, and bluff body is weathered.C) high speed difference same direction jet flame stabilizer is seen No. 85100050 patents that China has announced, and it is to utilize the ejector action of high-speed jet to air and fuel mixture, produces a bigger high temperature recirculation zone in the combustion chamber.Though it has overcome many shortcomings of above-mentioned two kinds of flame stabilizing methods, owing to need to adopt gases at high pressure to produce high-speed jet, this will increase by a cover high-voltage power supply and a high-pressure duct system undoubtedly on equipment, from there being the complicated shortcoming of equipment.While is owing to the restriction of high-pressure blast, thereby primary air velocity will be subjected to bigger restriction.
Task of the present invention provides a kind of method and device thereof of the retention flame, and it can overcome the shortcoming of mentioning in above-mentioned eddy flow, bluff body and the high speed difference same direction jet technology.
For achieving the above object, the present invention adopts following method and structure: air and fuel mixture are injected bigger high temperature recirculation zone of generation in the confined space with certain speed by the spout direct current ground of settling at chamber front end portion off-axis.Fresh fuel constantly directly falls into the recirculating zone, and is lighted rapidly, like this, makes fired state keep stable.Smooth combustion device involved in the present invention is that spout or the nozzle that an off-axis is settled is installed on the front end face of combustion chamber.The distance of this spout horizontal center line axis and combustion chamber upper wall surface should less than with the distance of combustion chamber lower wall surface.It also is the above position, center that spout or nozzle are installed in the chamber front end face.
The present invention does not need any optional feature (for example spinning disk, bluff body etc.), does not need any high pressure to assist source of the gas, thereby overcome all shortcomings in the prior art owing to simple in structure, easy to use.Burning is the result show, not only burning has fabulous steady combustion effect to high-quality in this invention, and also can fine smooth combustion for inferior fuel (for example meager coal of fugitive constituent＜15%), thereby make this technology have more wide application prospect, for example, may be used on the precombustion chamber of generating plant pulverized coal boiler or industrial coal powder boiler, also can be used for stablizing cool water mixture burning.
The present invention is described in further detail below with reference to accompanying drawing.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a principle schematic of the present invention.
Invention main body shown in Figure 1 by combustion chamber (1) and spout (or nozzle) (2), burning torch (3), blow ash mouthful (4) and form.Spout (or nozzle) (2) is placed on the front end face of combustion chamber (1), the distance of it and upper wall surface less than with the distance of lower wall surface, i.e. a＜b.
Principle of the present invention as shown in Figure 2.Air and fuel (6) with certain speed after combustion chamber (1) is gone in spout (2) direct projection because to the ejector action of air-flow on every side, a formation bigger high temperature recirculation zone (5) combustion chamber (1) in.The fresh flammable mixture that constantly flows to because the gravity agency part falls into high temperature recirculation zone (5), is lighted, and keeps smooth combustion.
Fig. 3 is embodiments of the invention.
Combustion chamber (1) length L=1300mm, diameter D=450mm, spout (2) diameter d=80mm, offset or dish h=160mm during operation, lights miniature oil gun (3) earlier, drop into a wind (air and burning) (6) then, fuel is lighted rapidly, adjusts air quantity, treat operating mode reach stable after, promptly close oil gun, and drop into soot-blowing wind, to purge the bottom accumulated powder and to replenish suitable air quantity, like this, even if the starting process of precombustion chamber is finished, and keep smooth combustion.
The Industrial Analysis of table coal dust burning
Coal fugitive constituent V
f% ash A
f% moisture content W
f%
Shunyi coal dust 24.53 24.71 2.24
Huaibei power plant coal dust 14.7 30 1
Baoding power plant coal dust 15.14 30 0.42
The invention provides a kind of method and apparatus of retention flame overheavy firing, because it is simple in structure, easy to operate, reliable, be with a wide range of applications for station boiler and Industrial Boiler. Be suitable for too for cool water mixture burning.
Claims (3)
1, a kind of method that is used for smooth combustion sprays into the combustion chamber with it is characterized in that the air fuel mixture off-axis, thereby produces big recirculating zone in the combustion chamber.
2, by the burner of the described method of claim 1 design by a combustion chamber (1), spout (2), burning torch (3), blow ash mouthful (4) and form, it is characterized in that spout (2) is offset on the front end face of combustion chamber (1).
3, by the described burner of claim 2, the distance of it is characterized in that setovering spout central axis and combustion chamber upper wall less than with the distance of combustion chamber lower wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87102139A CN87102139B (en) | 1987-03-21 | 1987-03-21 | Baised jet flame stabilizing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87102139A CN87102139B (en) | 1987-03-21 | 1987-03-21 | Baised jet flame stabilizing method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87102139A true CN87102139A (en) | 1987-09-09 |
| CN87102139B CN87102139B (en) | 1988-09-21 |
Family
ID=4813835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87102139A Expired CN87102139B (en) | 1987-03-21 | 1987-03-21 | Baised jet flame stabilizing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87102139B (en) |
-
1987
- 1987-03-21 CN CN87102139A patent/CN87102139B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87102139B (en) | 1988-09-21 |
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| 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 |