CN217274119U

CN217274119U - Ultra-low nitrogen combustion head for gas burner

Info

Publication number: CN217274119U
Application number: CN202220205208.7U
Authority: CN
Inventors: 李向阳; 许君
Original assignee: Wuxi Huoshen Combustion Equipment Co ltd
Current assignee: Wuxi Huoshen Combustion Equipment Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-08-23
Anticipated expiration: 2032-01-25

Abstract

The utility model belongs to the technical field of the industrial burner, especially, be an ultralow nitrogen combustion head for gas burner, the novel nipple rectifier comprises a cylindrical shel, be equipped with the gas trunk line in the barrel, steady flame dish is installed on the top of barrel, the intercommunication has a set of one-level gas pipeline on the lateral wall of gas trunk line, the top of one-level gas pipeline runs through steady flame dish and extends to its upper portion, the intercommunication has a set of second grade gas pipeline on the terminal lateral wall of gas trunk line. The utility model discloses a gas trunk line, one-level gas pipeline, second grade gas pipeline and flow guide plate can be dispersed flame, and the flame outside and the quick heat transfer of oven reduce the peak temperature of flame surface, and the flue gas after the cooling flows back to the flame center, to the inboard cooling of flame to reach the purpose of low-nitrogen combustion, the first simple structure of burning of this technique simultaneously, simple to operate, it is safe in utilization, and combustion stability is good, the burning is abundant, the low noise, nitrogen oxide emission value is low, and the cost is lower.

Description

Ultra-low nitrogen combustion head for gas burner

Technical Field

The utility model relates to an industrial burner technical field specifically is an ultralow nitrogen combustion head for gas burner.

Background

The emission value of nitrogen oxides in boiler flue gas is an important index for measuring the performance of a combustor. Nitrogen oxides are formed by oxidation of nitrogen in the combustion air used in the burner in a high temperature combustion environment. The peak temperature in the furnace, the residence time of the flue gas in the high-temperature area and the oxygen concentration in the high-temperature area are main factors influencing the generation of nitrogen oxides.

The low-nitrogen combustion technology adopted by the existing gas burner mainly comprises two main types of full-premixing surface combustion, flue gas recirculation and the like.

The full-premixing surface combustion technology is that the gas and the air are fully mixed and then are combusted on the surface of the metal woven net. The flame generated by the technology has large coverage area and short length, so that the residence time of the flue gas in the high-temperature area is extremely short, and the effect of low nitrogen is achieved. However, in the technology, the fuel gas and the air need to be mixed in advance, the potential safety hazard of tempering is easily caused, the metal woven net is easily blocked by particles in the air and loses effectiveness, and the qualified full-load emission can be ensured only by using the peroxide combustion, so that the energy waste is caused.

The flue gas recirculation is divided into an external circulation and an internal circulation. The external circulation is to mix part of the flue gas of the chimney with combustion air and then send the mixture into the combustion chamber, so as to achieve the effects of diluting flame and reducing peak temperature, thereby achieving low nitrogen. This technique needs to be under construction to the boiler secondary, and the steam in the flue gas combines with carbon dioxide to form the acid water, causes electrical components to damage after the condensation, corrodes the combustor body.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a to prior art not enough, the utility model provides an ultralow nitrogen combustion head for gas burner has solved the problem that above-mentioned background art provided.

(II) technical scheme

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides an ultralow nitrogen combustion head for gas burner, includes the barrel, be equipped with the gas trunk line in the barrel, steady flame dish is installed on the top of barrel, the intercommunication has a set of one-level gas pipeline on the lateral wall of gas trunk line, the top of one-level gas pipeline runs through steady flame dish and extends to its upper portion, the intercommunication has a set of second grade gas pipeline on the terminal lateral wall of gas trunk line, the end of gas trunk line is equipped with toper or plane water conservancy diversion dish, install the sleeve on the steady flame dish, install the ignition rod on the steady flame dish, one side of ignition rod is installed and is examined the fire needle.

Further, the second-level gas pipeline is a straight pipe inclined at a certain angle or in the radial direction, and the second-level gas pipeline is arranged in a gap between the flow guide disc and the sleeve.

Furthermore, the side wall of the top end of the primary gas pipeline is provided with a jet hole communicated with the interior of the primary gas pipeline.

Further, the sleeve and the cylinder are located on the same central axis, and the distance between the flow deflector and the sleeve can be adjusted.

Further, most of air passes through the gap between the deflector and the sleeve, and the air flows out in four directions in a plane or a certain near-conical angle under the action of the deflector.

Further, the flame stabilizing disc is arranged at the periphery of the flame.

(III) advantageous effects

Compared with the prior art, the utility model provides an ultralow nitrogen combustion head for gas burner possesses following beneficial effect:

the utility model discloses, through gas trunk line, one-level gas pipeline, second grade gas pipeline and guiding disc, can scatter flame, the flame outside and the quick heat transfer of oven reduce the peak temperature of flame surface, and the flue gas after the cooling flows back to the flame center, to the inboard cooling of flame to reach the purpose of low nitrogen burning, the combustion head of this technique is simple structure simultaneously, simple to operate, safe in utilization, and combustion stability is good, and the burning is abundant, the low noise, nitrogen oxide emission value is low, and the cost is lower.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic structural view of the present invention with the barrel removed;

fig. 3 is a schematic sectional view of the present invention.

In the figure: 1. a barrel; 2. a main gas pipeline; 3. a flame stabilizing disc; 4. a primary gas pipeline; 5. a secondary gas pipeline; 6. a flow guide disc; 7. a sleeve; 8. an ignition bar; 9. fire detecting needle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the utility model provides an ultralow nitrogen combustion head for gas burner, including barrel 1, be equipped with gas trunk line 2 in the barrel 1, steady flame dish 3 is installed on the top of barrel 1, the intercommunication has a set of one-level gas pipeline 4 on the lateral wall of gas trunk line 2, the top of one-level gas pipeline 4 runs through steady flame dish 3 and extends to its upper portion, the intercommunication has a set of second grade gas pipeline 5 on the terminal lateral wall of gas trunk line 2, the end of gas trunk line 2 is equipped with toper or plane guiding disc 6, install sleeve 7 on the steady flame dish 3, install ignition rod 8 on the steady flame dish 3, one side of ignition rod 8 is installed and is examined fire needle 9; the gas can be conveyed through the gas main pipeline 2, during operation, the combustion air blown into the combustor is divided into two parts, the two parts are mixed with the gas sprayed from the circumferential spray holes on the primary gas pipeline 4 through the small holes on the flame stabilizing disc 3, the gas is combusted after ignition, flame stabilization can be realized, the phenomenon of flameout caused by unstable air flow or flame size adjustment can be prevented, one part of the air is sprayed out from the gap between the sleeve 7 and the flow guide disc 6 through the sleeve 7, the sprayed air can enter the combustion chamber along the flow guide disc 6 at a certain angle and initial speed, the air is mixed and combusted with the gas sprayed from the secondary gas pipeline 5, the flame formed by the part is a main combustion area, it is worth explaining that a plurality of small holes are uniformly formed on the flame stabilizing disc 3, the reserved holes matched with the ignition rod 8 and the fire detection needle 9 are formed on the flame stabilizing disc 3, the air is convenient to be mixed with the gas in the primary gas pipeline 4 through the small holes on the flame stabilizing disc 3, thereby facilitating the combustion of the fuel gas, and it is worth explaining that the distance between the needle head of the ignition rod 8 and the jet hole on the first-level fuel gas pipeline 4 is kept 3 mm.

As shown in fig. 3, in some embodiments, the secondary gas conduit 5 is a straight pipe inclined at an angle or in a radial direction, and the secondary gas conduit 5 is disposed in a gap between the deflector 6 and the sleeve 7; through setting up second grade gas pipeline 5 in the clearance between flow guide disc 6 and sleeve 7, can mix second grade gas pipeline 5 spun gas with the air through flow guide disc 6 to can carry out abundant low-nitrogen combustion.

As shown in fig. 1, in some embodiments, the side wall of the top end of the primary gas pipeline 4 is provided with a jet hole communicated with the interior thereof; make things convenient for the gas that one-level gas pipeline 4 carried gas trunk line 2 to spout through the jet orifice to conveniently burn, cooperation second grade gas pipeline 5 can scatter flame, and the flame outside exchanges heat with the oven fast, reduces the peak temperature of flame surface, and the flue gas after the cooling flows back to flame center, to the inboard cooling of flame, thereby reaches the purpose of low nitrogen burning.

As shown in fig. 2, in some embodiments, the sleeve 7 is located on the same central axis as the cylinder 1, and the distance between the deflector 6 and the sleeve 7 can be adjusted; can axial displacement through gas trunk line 2, can be used for adjusting the interval between sleeve 7 and the flow guide plate 6, can change the speed of air-out through the interval between adjustment sleeve 7 and the flow guide plate 6 to adapt to different boilers and adjust the formation of nitrogen oxide.

As shown in fig. 1, in some embodiments, most of the air passes through the gap between the diaphragm 6 and the sleeve 7, and the air flows out in four directions under the action of the diaphragm 6 in a plane or a certain near-conical angle; the air can flow out in four directions through the clearance between the flow guide disc 6 and the sleeve 7, so that the fuel gas can be fully mixed and can be combusted more fully.

As shown in fig. 1, in some embodiments, the flame holder 3 is at the periphery of the flame; can play the function of steady flame, compare with prior art and carry out steady flame at the center of flame with the line, the effect of this steady flame is better.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-low nitrogen combustion head for a gas burner, comprising a barrel (1), characterized in that: be equipped with gas trunk line (2) in barrel (1), steady flame dish (3) is installed on the top of barrel (1), the intercommunication has a set of one-level gas pipeline (4) on the lateral wall of gas trunk line (2), the top of one-level gas pipeline (4) runs through steady flame dish (3) and extends to its upper portion, the intercommunication has a set of second grade gas pipeline (5) on the terminal lateral wall of gas trunk line (2), the end of gas trunk line (2) is equipped with toper or plane water conservancy diversion dish (6), install sleeve (7) on steady flame dish (3), install ignition rod (8) on steady flame dish (3), examine fire needle (9) are installed to one side of ignition rod (8).

2. An ultra-low nitrogen burner head for a gas burner as claimed in claim 1, characterized in that: the secondary gas pipeline (5) is a straight pipe inclined at a certain angle or in the radial direction, and the secondary gas pipeline (5) is arranged in a gap between the flow guide disc (6) and the sleeve (7).

3. An ultra-low nitrogen burner head for a gas burner as claimed in claim 1, characterized in that: and the side wall of the top end of the first-stage gas pipeline (4) is provided with jet holes communicated with the interior of the first-stage gas pipeline.

4. An ultra-low nitrogen burner head for a gas burner as claimed in claim 1, characterized in that: the sleeve (7) and the barrel (1) are located on the same central axis, and the distance between the flow guide disc (6) and the sleeve (7) can be adjusted.

5. An ultra-low nitrogen burner head for a gas burner as claimed in claim 1, characterized in that: most of air passes through a gap between the deflector (6) and the sleeve (7), and the air flows out in four directions at a plane or a certain approximate conical angle under the action of the deflector (6).

6. An ultra-low nitrogen burner head for a gas burner as claimed in claim 1, characterized in that: the flame stabilizing disc (3) is positioned at the periphery of the flame.