CN1003137B - Combustion apparatus with circular counter efflux stabilizer - Google Patents
Combustion apparatus with circular counter efflux stabilizer Download PDFInfo
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- CN1003137B CN1003137B CN86107251.0A CN86107251A CN1003137B CN 1003137 B CN1003137 B CN 1003137B CN 86107251 A CN86107251 A CN 86107251A CN 1003137 B CN1003137 B CN 1003137B
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- combustion
- coal
- jet
- annular
- flame stabilizer
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Abstract
The combustion apparatus is in two types, wherein one type is a direct-current pre-combustion chamber with multiple concentric annular jet flows in reverse distribution, and the other type is a large-space combined combustion apparatus with multiple concentric jet flows in reverse distribution. The multiple concentric annular jet flows in reverse distribution result in a good backflow structure so that the air quantity of the jet flows can be saved and the air supply pressure can be reduced, and fire-retardant fuel can be stably and strongly combusted in the pre-combustion chamber and a large space (such as a boiler body). The combustion apparatus can be used for pre-combustion chambers of direct-current coal powder, coal water slurry and poor oil, coal powder boilers, oil-combustion boilers and water-heating coal slurry and dilute gas combustion chambers transformed from furnaces.
Description
The present invention relates to a kind of cause to reflux by how annular reverse jet make combustion stablized burner.
For smooth combustion, the retention flame is come in the general employing recirculating zone that swirling eddy or bluff body caused in the combustion chamber.But concerning water-coal-slurry and coal dust, especially to meager coal, colm and anthracite combustion, these modes are not ideal.This mainly is that this just requires the coal grain in the recirculating zone will be arranged the much longer time of staying because tail-off time of coal grain is more much longer far away than gas or liquid fuel, and this is short of aforesaid way combustion chamber exactly.Most coal grains at first enter non-recirculating zone in this class combustion chamber, have only very little particle to enter the recirculating zone along with air-flow, obviously this heating to the coal grain, catch fire and burn unfavorable, and its combustibility is restricted.
The 8th the international coal slurry fuel preparation that Zhao Hui rich in May, 1986 holds in the U.S. and utilizing in the 373rd～375 page of paper of delivering of proceeding " new method of stabilize water coal slurry or pulverized coal flame ", the method of reverse annular jet stabilize water coal slurry and pulverized coal flame has been proposed, its unique advantage is arranged, make the coal grain can directly enter the recirculating zone.But be only limited to the monocycle form.To the ring of bigger slightly diameters, exist defective aspect the good recirculating zone causing.Because the monocycle jet characteristics is limit, and will cause hollow recirculating zone (see figure 1), particle can run through and mistake, is unfavorable for smooth combustion.
Patent CN 85100050A " a kind of intensified synclastic fluid flame stabilization and burner thereof " has proposed " high speed difference same direction jet " method and corresponding burner thereof, make the coal grain directly enter high temperature recirculation zone, this is the good burner of a kind of combustibility.But this invention has its deficiency: I, and the big II of high speed same direction jet institute air consumption, the high speed same direction jet need be used the high-pressure air source III, is limited to be used on precombustion chamber and the microburner.
The precombustion chamber exit that patent CN85100561A " water-coal-slurry and coal dust boiler with precombustion chamber for burning " proposes in its device is provided with the steady at a high speed combustion jet of blowback, makes high temperature gases recirculating, forms the stable ignition district.But being only limited to the precombustion chamber in this boiler with precombustion chamber for burning, is the sub-thread jet, and form is single, is difficult to use in large-scale combustion chamber.
At the problems referred to above, the objective of the invention is to provide a kind of coal grain that can make directly to enter the recirculating zone, and enough time of staying are arranged in the recirculating zone, and the few burner of air consumption.Make coal dust (bituminous coal, meager coal, colm, anthracite, brown coal etc.), the stable and overheavy firing of fuel slurry, fuel oil inferior and combustible gases (comprising rare gas) such as water-coal-slurry, hard grades of bitumen water slurry.In order to achieve the above object, the present invention has taked following solution:
The present invention proposes once-through type and has the precombustion chamber of annular reverse jet flame stabilizer or have precombustion chamber concurrently and the combustion chamber of burner double action (the abbreviation first kind); Have the large space compounding combustion device (being called for short the 3rd class) that has precombustion chamber or combustion chamber and annular reverse jet flame stabilizer that the large space burning device (being called for short second class) of annular reverse jet flame stabilizer and the first kind and second class are used in combination.
Main points of the present invention are to arrange a reverse jet flame stabilizer of annular (seeing Fig. 2 and Fig. 3) from the L place, position that wind exports certain axial distance in precombustion chamber or combustion chamber; In large space (for example boiler), the partial combustion device is arranged that at the L place, position that exports certain axial distance from wind the reverse jet flame stabilizer of corresponding annular sees Fig. 4 and Fig. 5 respectively.Reverse jet flame stabilizer of annular and precombustion chamber or combustion chamber or large space (for example boiler) constitute a burner.Precombustion chamber or combustion chamber and annular reverse jet flame stabilizer large space burning device constitute the 3rd class burner.The reverse jet flame stabilizer of annular is made up of a plurality of concentric rings, has the distribution jet orifice towards the fuel gas stream direction on each ring, and jet source of the gas pipe is linked to be the integral body that inside communicates to these a plurality of concentric rings.
The invention will be further described below in conjunction with drawings and Examples:
Accompanying drawing 1 is the hollow recirculating zone schematic diagram that the reverse jet of monocycle causes.Be the recirculating zone in the dotted line scope.
Accompanying drawing 2 is once-through type reverse jet flame stabilizer precombustion chambers of annular or has precombustion chamber concurrently and a kind of pattern schematic diagram in the combustion chamber of burner double action.Wherein 1 is that wind axis is aweather sent into precombustion chamber or combustion chamber to coal dust or water-coal-slurry mist or fuel oil inferior or combustible gas inferior for burning.The 2nd, jet source of the gas pipe.Reverse jet media is introduced thus.The 3rd, secondary wind is for making burning further fully.The 4th, reverse jet is to cause backflow.The 5th, annular reverse jet flame stabilizer, the good recirculating zone to cause particle directly to enter reaches flameholding and reinforcement.The 6th, precombustion chamber or combustion chamber.When having precombustion chamber and burner double action concurrently, make precombustion chamber at low coal powder density and use; Making ordinary burner when high coal powder density uses.The 7th, furnace wall.
Accompanying drawing 3 be in the accompanying drawing 2 flameholder along A-A line profile.
Accompanying drawing 4 is the schematic diagrames that have a kind of pattern of large space burning device of annular reverse jet flame stabilizer.Wherein 1 is a wind.The 5th, annular reverse jet flame stabilizer.The 7th, furnace wall.The 9th, burner.The 10th, large space (for example boiler).
Accompanying drawing 5 be in the accompanying drawing 4 flameholder along B-B line profile.
Accompanying drawing 6 is the recirculating zone schematic diagrames that have the annular reverse jet of centre bore to cause.Be the recirculating zone in the dotted line scope.As can be seen, this recirculating zone is very good.
When enforcement is of the present invention, the reverse jet flame stabilizer of annular is that 2-10d(is relevant with the speed ratio big or small and reverse jet and main flow of ring outside diameter d from a wind (coal dust or water-coal-slurry or fuel oil inferior or combustible gas+air) outlet axial distance L), reverse effluxvelocity is relevant with outlet distance L and furnace temperature with mainstream speed for 4-14(with the mainstream speed ratio), the pass of an annular outside diameter d and a wind outlet diameter D is d=0.5-2D, and the jet aperture is at the 2-3 millimeter.Reverse jet faces main flow direction, economizes gas the most with the single row of holes structure, and effect is also good.
The reverse jet flame stabilizer of annular can adopt metal material.Because reverse jet ejection is arranged, thereby can not burn out, efflux nozzle can not stop up yet.
The 3rd class burner that precombustion chamber or combustion chamber and annular reverse jet flame stabilizer large space burning device are combined, the reverse jet flame stabilizer of corresponding annular is set in partial combustion device exit, be used in combination with once-through type reverse jet flame stabilizer precombustion chamber of annular or combustion chamber, configuration some precombustion chambers, the flame that produces with precombustion chamber plays and ignites and steady combustion effect, and can realize the adjusting to underload.
Reverse jet media available air or steam promote that the gas or material (as combustible gas, oxygen, the combustion adjuvant etc.) effect of reaction are better if wherein contain.This smooth combustion to rare gas is very favourable.
In addition, circulating flow strength and recirculating zone temperature can be controlled by regulating reverse effluxvelocity (also being supply gas pressure), are easy to regulate furnace temperature like this.
The present invention removes has advantage that patent CN85100050A has such as simple in structure, can use lower temperature preheated air or cold wind, uses no or little combustion-supporting oil, be easy to regulate furnace temperature and combustibility good outside, it also has following advantage.
1. how annular reverse distribution jet can cause very good recirculating zone (see figure 6).The effect of its leading edge is similar to bluff body, and main flow is refluxed around it; But being different from bluff body, particle can directly enter high temperature recirculation zone and carry out strong momentum, energy exchange, thereby has guaranteed that the time of length is fully carried out chemical reaction and burning in the particle stop.Owing to be not the ejector action that relies on high-speed jet in the same way, but adopt annular reverse velocity function to cause good backflow, so the required tolerance of how annular reverse distribution jet is about the 1/4-1/8 of the high-speed jet amount in the same way among the patent CN85100050A, consumes energy is few.In addition, required supply gas pressure is also much lower.
2. because many loop configuration characteristics, thereby can in large space, cause the recirculation zone of required scope as required, this is that patent CN85100050A and patent CN85100561A are difficult to accomplish, this is particularly conducive on large-scale combustion chamber and large and medium-sized boiler and uses.
Burner of the present invention can be stablized and the difficult combustion of overheavy firing fuel.The reverse jet flame stabilizer precombustion chamber of first kind once-through type of the present invention annular can be with the steady burning smoke coal of cold wind, meager coal powder and water-coal-slurry, and soft coal, anthracite and brown coal are also had tangible overheavy firing effect.The pulverized coal flame that produces with precombustion chamber can replace fuel oil flame to be used for industrial furnace, also can replace oil gun to make the usefulness of ignition of the boiler, also can regulate the usefulness of underload, reaches a large amount of saving igniting and the underload purpose with oil.The reverse jet flame stabilizer of first kind once-through type annular of the present invention has the combustion chamber of precombustion chamber and burner double action concurrently, when hanging down coal powder density, promptly can make precombustion chamber when igniting and underload adjusting and use; When high coal powder density, just can make ordinary burner during the boiler rated load and use.The reverse jet flame stabilizer large space burning device of second class annular of the present invention can be used for large and medium-sized coal-powder boiler and burns the inferior grade coal dust, also can be used for fuel oil industry and station boiler retrofitted for firing coal-water slurry, stable and reinforcement coal dust and cool water mixture burning.To Industrial Boiler, large and medium-sized station boiler can use the 3rd class of the present invention, it is the burner that the first kind and second class are used in combination, the suitably first kind precombustion chamber or the combustion chamber of configuration some, both can play ignite, surely combustion effect, the usefulness that can regulate underload again.In addition, the rare gas and the aeroengine thrust augmentation combustion chamber of discharging in the smooth combustion colliery
Claims (3)
1, a kind of once-through type has the precombustion chamber of annular reverse jet flame stabilizer or has precombustion chamber concurrently and the combustion chamber of burner double action, it is characterized in that: the reverse jet flame stabilizer of this annular is made up of a plurality of concentric rings, have the distribution jet orifice towards the fuel gas stream direction on each ring, jet source of the gas pipe is linked to be the integral body that inside communicates to these a plurality of concentric rings.
2, a kind of large space burning device that has annular reverse jet flame stabilizer, it is characterized in that: these annular reverse jet flame stabilizers are made up of a plurality of concentric rings, have the distribution jet orifice towards the fuel gas stream direction on each ring, jet source of the gas pipe is linked to be the integral body that inside communicates to a plurality of concentric rings.
3, a kind of large space compounding combustion device that has precombustion chamber and annular reverse jet flame stabilizer, this precombustion chamber inside also is provided with annular reverse jet flame stabilizer, it is characterized in that: these annular reverse jet flame stabilizers are made up of a plurality of concentric rings, have the distribution jet orifice towards the fuel gas stream direction on each ring, jet source of the gas pipe is linked to be the integral body that inside communicates to a plurality of concentric rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86107251.0A CN1003137B (en) | 1986-10-23 | 1986-10-23 | Combustion apparatus with circular counter efflux stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86107251.0A CN1003137B (en) | 1986-10-23 | 1986-10-23 | Combustion apparatus with circular counter efflux stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86107251A CN86107251A (en) | 1987-08-12 |
| CN1003137B true CN1003137B (en) | 1989-01-25 |
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ID=4803536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86107251.0A Expired CN1003137B (en) | 1986-10-23 | 1986-10-23 | Combustion apparatus with circular counter efflux stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003137B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528316B1 (en) * | 2002-08-09 | 2017-10-04 | JFE Steel Corporation | Combustion controller for tubular flame burner and method for controlling combustion |
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1986
- 1986-10-23 CN CN86107251.0A patent/CN1003137B/en not_active Expired
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| Publication number | Publication date |
|---|---|
| CN86107251A (en) | 1987-08-12 |
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