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A self preheat formula naked light nozzle for oxygen boosting burning
Description
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Technical field
The utility model relates to a kind of fuel burner nozzle, is specifically related to a kind of self-preheating type open flame combustion nozzle for oxygen-enriched combusting.
Background technology
At present, in metal heat treatmet etc., product quality is required that, in higher industry, radiation pipe burner tip mode of heating obtains promotion and application widely.The operation principle of radiant tube: combustion air feeds in air hose, burner place is entered after heat exchanger heating, burn after lighting a fire in the combustion gas mixing of burner end and infeed, high-temperature flue gas (combustion product) is at radiation Bottomhole pressure, in the process of flow of flue gas, high-temperature flue gas gives outside product by radiant tube transferring heat, and reach the object of heating products, then high-temperature flue gas is discharged from radiant tube exhaust opening after heat exchanger heats combustion air.
In modern integrated iron and steel works, great majority, all from having supporting oxygen installation, changing over oxygen-enriched combustion-supporting burning with oxygen air and being called oxygen-enriched combustion technology.The nitrogen that in combustion process, combustion air sees in does not participate in burning, but but take away a large amount of heats when it is drained.By improving the content of oxygen, the ratio of nitrogen can be reduced further, the heat taken away when reducing its smoke evacuation, increasing polyatom combustion product (CO
2, H
2etc. O) proportion, can improve the thermal efficiency of burner hearth greatly, reach fuel-saving object.Oxygen-enriched combusting can cause flame to burn rapidly, forms high-temperature area, affects temperature uniformity, and reduce the life-span of burner and miscellaneous part.The existing patent No. is a kind of self-preheating type combustor of 200920194538.5, the Gas Pipe, ignitor, the combustion chamber that comprise air conduit and install within it, described combustion chamber is placed in air conduit front opening place, Gas Pipe and ignitor front end stretch in combustion chamber, described air conduit rear end outer cover is equipped with band air space and communicates with air cabinet with the gap between air conduit outer wall, be positioned at heat exchanger and be also set with smoke tube outward, described smoke tube rear end has exhanst gas outlet.Because this utility model patent does not have the burn rate delaying burner, reduce the advantage of flame temperature, so oxygen-enriched combustion technology can not be applied.
Summary of the invention
Problem to be solved in the utility model is, for the deficiency of above-mentioned technology, on the basis of original a kind of self-preheating type combustor, design a kind of scientific and reasonable for structure, burn rate that can delay burner, reduce flame temperature, the self-preheating type open flame combustion nozzle for oxygen-enriched combusting that increases the service life.
The technical scheme that the utility model adopts for its problem of solution is:
A kind of self-preheating type open flame combustion nozzle for oxygen-enriched combusting, comprise housing, heat exchanger, air duct, gas pipeline, ignitor, mixed allocation device, combustion chamber, described heat exchanger is communicated with air intake and exhanst gas outlet respectively, described combustion chamber is fixed in air duct by support, described housing is provided with the fuel gas inlet being communicated with gas pipeline, described heat exchanger right part is provided with air distributor cap plate, described air distributor cap plate is provided with secondary combustion-supporting air holes and three combustion-supporting air holes, described mixed allocation device comprises primary air passage, a blast tube, be communicated in gas pipeline and extend to the secondary Gas Pipe of combustion chamber spout.
In the utility model, between described air duct and combustion chamber, be provided with circumferential weld.
The beneficial effects of the utility model are: the utility model relates to a kind of fuel burner nozzle, are specifically related to a kind of self-preheating type open flame combustion nozzle for oxygen-enriched combusting.The utility model is the improvement carried out on a kind of basis of self-preheating type combustor, because the heat exchanger right part of this utility model is provided with air distributor cap plate, described air distributor cap plate is provided with secondary combustion-supporting air holes and three combustion-supporting air holes, mixed allocation device comprises primary air passage, a blast tube, be communicated in gas pipeline and extend to the secondary Gas Pipe of combustion chamber spout, so the burn rate of burner can be delayed, reduction flame temperature, increase the service life, make self-preheating type open flame combustion nozzle provided by the utility model can apply oxygen-enriched combusting better.
The supply of the effect energy grading control combustion gas of mixed allocation device, fraction combustion gas is entered in combustion chamber and carries out primary combustion, most of combustion gas then enters smoulder in radiant tube.The supply of the effect energy grading control air of air distributor cap plate, make a part of combustion adjuvant entered as primary combustion in combustion chamber of combustion air, a part participates in second-time burning by secondary combustion-supporting air holes at nozzle, a part enters in burner hearth by three combustion-supporting air holes, burns further in burner hearth with residue combustion gas.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in embodiment of the present utility model, below the accompanying drawing used required in describing embodiment is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present utility model, instead of whole embodiment, and those skilled in the art, under the prerequisite not paying creative work, can also obtain other designs and accompanying drawing according to these accompanying drawings.
Fig. 1 is the sectional view one of the present embodiment;
Fig. 2 is the sectional view two of the present embodiment;
Fig. 3 is the sectional perspective structural representation of the mixed allocation device of the present embodiment.
Detailed description of the invention
Clear, complete description is carried out, to understand the purpose of this utility model, characteristic sum effect fully below with reference to embodiment and the accompanying drawing technique effect to design of the present utility model, concrete structure and generation.Obviously; described embodiment is a part of embodiment of the present utility model, instead of whole embodiment, based on embodiment of the present utility model; other embodiments that those skilled in the art obtains under the prerequisite not paying creative work, all belong to the scope of the utility model protection.In addition, all connection/annexations mentioned in literary composition, not singly refer to that component directly connects, and refer to and according to concrete performance, can connect auxiliary by adding or reducing, and form more excellent draw bail.Each technical characteristic in the utility model, can combination of interactions under the prerequisite of not conflicting conflict.
Referring to figs. 1 through Fig. 3, as shown in the figure, a kind of self-preheating type open flame combustion nozzle for oxygen-enriched combusting, comprise housing 1, heat exchanger 2, air duct 3, gas pipeline 4, ignitor 5, mixed allocation device, combustion chamber 6, described heat exchanger 2 is communicated with air intake 7 and exhanst gas outlet 8 respectively, described combustion chamber 6 is fixed in air duct 3 by support 9, described housing 1 is provided with the fuel gas inlet 10 being communicated with gas pipeline 4, described heat exchanger 2 right part is provided with air distributor cap plate 11, described air distributor cap plate 11 is provided with secondary combustion-supporting air holes 12 and three combustion-supporting air holes 13, described mixed allocation device comprises primary air passage 14, a blast tube 15, be communicated in gas pipeline 4 and extend to the secondary Gas Pipe 16 of combustion chamber 6 spout.
Further, circumferential weld 17 is provided with between described air duct 3 and combustion chamber 4.
With reference to Fig. 1, as shown in the figure, the combustion air of the present embodiment flows to and is: flow through heat exchanger 2 by air intake 7, heat exchange is carried out with high-temperature flue gas in heat exchanger 2, combustion air temperature raises, be circulated to air distributor cap plate 11, by air distributor cap plate 11, combustion air is divided into three parts to supply, the combustion adjuvant that a part enters as primary combustion in combustion chamber 4 respectively, a part participates in second-time burning by secondary combustion-supporting air holes 12 at nozzle, a part enters in burner hearth by three combustion-supporting air holes 13, burns further in burner hearth with residue combustion gas.
With reference to Fig. 2, as shown in the figure, the flue gas flow direction of the present embodiment is: high-temperature flue gas is circulated to exhanst gas outlet 8 by entrance, carries out sufficient heat exchange in the process with the combustion air in heat exchanger 2.
The gas-flow of the present embodiment to for: flowed into by fuel gas inlet 10, flow through gas pipeline 4 and arrive mixed allocation device, combustion gas is divided into two parts by mixed allocation device, and be that a part of combustion gas enters in combustion chamber 4 and carries out primary combustion respectively, smoulder in burner hearth is then entered in remainder combustion gas.
Above better embodiment of the present utility model is illustrated, but the utility model is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent modifications or replacement under the prerequisite without prejudice to the utility model spirit, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (2)
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Claims (2)
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1. the self-preheating type open flame combustion nozzle for oxygen-enriched combusting, comprise housing (1), heat exchanger (2), air duct (3), gas pipeline (4), ignitor (5), mixed allocation device, combustion chamber (6), described heat exchanger (2) is communicated with air intake (7) and exhanst gas outlet (8) respectively, described combustion chamber (6) is fixed in air duct (3) by support (9), described housing (1) is provided with the fuel gas inlet (10) being communicated with gas pipeline (4), it is characterized in that: described heat exchanger (2) right part is provided with air distributor cap plate (11), described air distributor cap plate (11) is provided with secondary combustion-supporting air holes (12) and three combustion-supporting air holes (13), described mixed allocation device comprises primary air passage (14), a blast tube (15), be communicated in gas pipeline (4) and extend to the secondary Gas Pipe (16) of combustion chamber (6) spout.
2. the self-preheating type open flame combustion nozzle for oxygen-enriched combusting according to claim 1, is characterized in that: be provided with circumferential weld (17) between described air duct (3) and combustion chamber (4).