Low-nitrogen gas burner

Abstract

The utility model discloses a low-nitrogen gas burner which comprises a burner body and a flame nozzle, one end of the burner body is connected with a straight barrel, a gas conveying barrel is connected in the burner body, the bottom of the straight barrel is connected with a gas pipe, one end of the gas pipe is communicated with the gas conveying barrel, and a flame stabilizing disc is arranged in the straight barrel. Two groups of flue gas channels are arranged in the straight barrel, one end of each flue gas channel is communicated with the gas conveying barrel, a first fan is arranged in each flue gas channel, the flame nozzle is arranged on one side of the flame stabilizing disc in the gas conveying barrel, and flue gas generated by combustion can be conveyed into the gas conveying barrel for secondary combustion by arranging the flue gas channels and the first fans; by means of the structure, incompletely-combusted combustible components such as carbon monoxide, hydrogen and uncombusted hydrocarbon in smoke can react with oxygen again and release energy, the additionally-released energy can be fully utilized, energy waste is avoided, the overall energy conversion efficiency of the combustor is improved, and the operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of combustor, specifically relates to a low nitrogen gas combustor. BACKGROUND

[0002] The low nitrogen gas combustor is a combustor used in combustion equipment such as a boiler, a hot water boiler and an industrial furnace, and its main feature is that the generation amount of nitrogen oxides generated in the combustion process can be controlled through technical means to achieve the purpose of reducing air pollution emissions.

[0003] The existing low nitrogen gas combustor usually mixes gas and air at the combustion head and burns them, and they achieve the purpose of reducing nitrogen oxide emissions through different technical means, such as staged combustion, dense and thin combustion, etc. However, some low nitrogen gas combustors have a significant disadvantage, that is, the flue gas generated by combustion cannot be subjected to secondary combustion. In an ideal combustion process, the combustible components in the flue gas that are not completely combusted, such as carbon monoxide, hydrogen and some unburned hydrocarbons, etc., react with oxygen again to release additional energy and further reduce the emission of pollutants. SUMMARY

[0004] The utility model aims at providing a low nitrogen gas combustor to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a low nitrogen gas combustor, comprising:

[0006] A combustor is connected with a straight cylinder at one end, a gas delivery cylinder is connected in the combustor, a gas pipe is connected to the bottom of the straight cylinder, one end of the gas pipe is connected to the gas delivery cylinder, a flame stabilizing disc is arranged in the straight cylinder, two groups of flue gas passages are arranged in the straight cylinder, one end of the flue gas passage is connected to the gas delivery cylinder, a first fan is arranged in the flue gas passage to deliver the flue gas generated by combustion into the gas delivery cylinder for secondary combustion.

[0007] A flame nozzle is arranged on one side of the flame stabilizing disc in the gas delivery cylinder to spray the flame out of the gas delivery cylinder.

[0008] Preferably, a filter plate for filtering particulate matters in the flue gas is arranged in the flue gas passage.

[0009] Preferably, a conical head is connected to one end of the gas delivery cylinder, and a plurality of gas passages are arranged in the conical head.

[0010] Preferably, a combustion chamber is arranged in the straight cylinder between the flame stabilizing disc and the flame nozzle.

[0011] Preferably, a rotational flow vane is rotatably connected to the middle of the conical head through a rotating shaft.

[0012] Preferably, the second fan is arranged in the combustor, and the air outlet of the second fan is connected with the gas conveying cylinder.

[0013] Preferably, the straight cylinder surface is connected with a plurality of fixing ears.

[0014] Preferably, the annular stabilizing disc is connected with a plurality of rotating flow plates.

[0015] Compared with the prior art, the combustor has the advantages that:

[0016] (1) The flue gas channel and the first fan are arranged, the flue gas generated by combustion can be conveyed into the gas conveying cylinder for secondary combustion, the combustible components, such as carbon monoxide, hydrogen and unburned hydrocarbons, in the flue gas can react with oxygen again and release energy, the additional released energy can be fully utilized, the energy waste is avoided, the overall energy conversion efficiency of the combustor is improved, and the operation cost is reduced.

[0017] (2) The filter plate is arranged in the flue gas channel, the particulate matters in the flue gas can be filtered, the particulate matters can be prevented from entering the gas conveying cylinder and the combustion area, the abrasion of the internal components of the combustor by the particulate matters is avoided, the service life of the equipment is prolonged, meanwhile, the filtered flue gas emission reduces the content of the particulate matters in the air, and the environmental protection effect is further improved.

[0018] (3) The rotating flow vane is rotationally connected with the rotating shaft in the middle of the conical head, and the annular stabilizing disc is connected with a plurality of rotating flow plates, the structures can make the air form a rotating flow, the rotating flow air and the gas are more fully mixed in the gas conveying cylinder, the forming area of the combustible mixed gas is expanded, the stabilizing disc cooperates with the flame nozzle to stabilize the flame root, the flame flickering, jumping or extinguishing is prevented, the stability and continuity of the combustion process are ensured, and the combustion efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the combustor;

[0020] Figure 2 is a structural schematic view of the combustor;

[0021] Figure 3 is a structural schematic view of the stabilizing disc;

[0022] Figure 4 is a structural schematic view of the first fan.

[0023] In the figure: 1, burner; 2, straight cylinder; 3, gas delivery cylinder; 4, flame stabilizing disc; 5, flue gas passage; 6, flame nozzle; 7, filter plate; 8, conical head; 9, gas passage; 10, combustion chamber; 11, swirl vane; 12, first fan; 13, second fan; 14, fixing lug; 15, swirl vane; 16, gas pipe; 17, bolt. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] The utility model provides a kind of low-nitrogen gas burner as Figures 1-4 As shown in the figure, it comprises:

[0026] Burner 1, one end of burner 1 is connected with straight cylinder 2, gas delivery cylinder 3 is connected in burner 1, gas pipe 16 is connected at the bottom of straight cylinder 2, and one end of gas pipe 16 is communicated with gas delivery cylinder 3, flame stabilizing disc 4 is arranged in straight cylinder 2, two groups of flue gas passages 5 are arranged in straight cylinder 2, and one end of flue gas passage 5 is communicated with gas delivery cylinder 3, first fan 12 is arranged in flue gas passage 5, which is used to transport flue gas generated by combustion into gas delivery cylinder 3 for secondary combustion.

[0027] Flame nozzle 6 is arranged at one side of flame stabilizing disc 4 in gas delivery cylinder 3, which is used to spray flame out of gas delivery cylinder 3.

[0028] Filter plate 7 for filtering particulate matters in flue gas is arranged in flue gas passage 5, filter plate 7 is inserted into flue gas passage 5 and is fixed on the surface of straight cylinder 2 by screwing bolt 17, when filter plate 7 needs to be replaced after long-term use, bolt 17 is loosened, bolt 17 is separated from the screwing of straight cylinder 2, then filter plate 7 can be pulled out from flue gas passage 5, and the replacement is completed by inserting new filter plate 7 into flue gas passage 5 and screwing bolt 17.

[0029] One end of gas delivery cylinder 3 is connected with conical head 8, a plurality of gas passages 9 are arranged in conical head 8, gas passages 9 can make gas more evenly dispersed in gas delivery cylinder 3, and the more uniform distribution of gas helps it to mix with air more fully, so that the combustion in combustion chamber 10 is more sufficient, the efficiency of primary combustion is improved, and more energy is released.

[0030] Combustion chamber 10 is arranged in straight cylinder 2 and between flame stabilizing disc 4 and flame nozzle 6.

[0031] The middle part of the conical head 8 is connected with the swirler vane 11 through the rotating shaft. When the air and gas in the gas cylinder 3 are blown out through the gas passage 9 in the conical head 8, the swirler vane 11 is driven to rotate, so that the air flowing through the swirler vane 11 is rotated to make the air and gas mix more fully.

[0032] The second fan 13 is arranged in the burner 1, and the air outlet of the second fan 13 is connected with the gas cylinder 3. The second fan 13 can continuously supply air into the gas cylinder 3.

[0033] The straight cylinder 2 is connected with a plurality of fixing ears 14, which provide clear positioning points for the installation of the burner 1.

[0034] The swirler vane 15 is annularly arranged on the flame stabilizing disc 4. When the mixed gas of air and gas is sprayed from the gas passage 9, the swirler vane 15 makes the gas flow rotate to form a low pressure area in the center, which can attract the high temperature flue gas to flow back and form a stable ignition source around the flame stabilizing disc 4. The flame root is stabilized in this area, which can avoid the situation that the flame flickers, jumps or even extinguishes due to external interference, and ensure the continuity and stability of the combustion process.

[0035] The low-nitrogen gas burner, the gas flows into the straight cylinder 2 through the gas pipe 16. Since the gas pipe 16 is connected with the gas cylinder 3, the gas enters the gas cylinder 3, and at the same time, the first fan 12 and the second fan 13 in the burner 1 start to work. The air outlet of the second fan 13 is connected with the gas cylinder 3, and the second fan 13 continuously supplies air into the gas cylinder 3. In the gas cylinder 3, the gas and air are preliminarily mixed to prepare for the subsequent combustion. The second fan 13 can adjust the flow and pressure of the air according to the actual demand through the external controller to ensure that the air and gas reach the appropriate ratio to meet the combustion demand under different working conditions. The air and gas in the gas cylinder 3 are blown to the swirler vane 11 connected with the rotating shaft in the middle part of the conical head 8 and the swirler vane 15 annularly arranged on the flame stabilizing disc 4 through the gas passage 9 in the conical head 8. The air flowing through the swirler vane 11 and the swirler vane 15 is rotated, and the rotating air and gas interact to increase the contact area of the gas and air, so that the mixture is more fully mixed. The mixed gas and air reach the combustion chamber 10 and the flame nozzle 6, and the ignition rod (not shown in the figure) arranged at the combustion chamber 10 ignites the mixed gas. The flame is preliminarily combusted in the combustion chamber 10 in the straight cylinder 2 and is sprayed from the flame nozzle 6.

[0036] The high-temperature flue gas generated by the initial combustion is drawn into the flue gas passage 5 under the action of the first fan 12, and passes through the filter plate 7 in the flue gas passage 5. The filter plate 7 can effectively intercept particulate matters in the flue gas, and is transported into the gas conveying cylinder 3 to be mixed with the newly entered air and gas again. Since there is still a certain temperature around the combustion chamber 10 after the initial combustion, and fresh air is continuously supplied in the gas conveying cylinder 3, suitable temperature and oxygen conditions are created for the secondary combustion. Under these conditions, the combustible components in the flue gas are ignited again to cause the secondary combustion. The secondary combustion further releases the energy contained in the combustible components, improves the energy utilization rate, simultaneously converts the incomplete combustion pollutants into relatively harmless substances, reduces the emission of harmful gases, and achieves the environmental protection goal of low-nitrogen combustion.

[0037] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A low-nitrogen gas burner, characterized by, Include: Burner (1), the burner (1) one end is connected with straight cylinder (2), the burner (1) is connected with gas cylinder (3) in, the straight cylinder (2) bottom is connected with gas pipe (16) and the one end of gas pipe (16) is communicated with gas cylinder (3), the straight cylinder (2) is equipped with flame stabilizer plate (4), the straight cylinder (2) is equipped with two groups of flue gas passage (5) and the one end of flue gas passage (5) is communicated with gas cylinder (3), the flue gas passage (5) is equipped with first fan (12) in, for the flue gas generated by combustion is sent into gas cylinder (3) and carries out secondary combustion; Flame nozzle (6), the flame nozzle (6) is located in the flame stabilizer plate (4) one side in gas cylinder (3), for making flame from gas cylinder (3) is sprayed.

2. A low-nitrogen gas burner according to claim 1, characterized in that: The flue gas passage (5) is equipped with filter plate (7) for filtering the particulate matter in the flue gas.

3. A low-nitrogen gas burner according to claim 1, characterized in that: The one end of the gas cylinder (3) is connected with the conical head (8), and a plurality of gas passages (9) are arranged in the conical head (8).

4. A low-nitrogen gas burner according to claim 1, characterized in that: The combustion chamber (10) is arranged in the straight cylinder (2) and located between the flame stabilizer plate (4) and the flame nozzle (6).

5. A low-nitrogen gas burner according to claim 3, characterized in that: The conical head (8) is rotatably connected with the rotational flow vane (11) through the rotating shaft.

6. A low-nitrogen gas burner according to claim 1, characterized in that: The second fan (13) is arranged in the burner (1) and the air outlet of the second fan (13) is communicated with the gas cylinder (3).

7. A low-nitrogen gas burner according to claim 1, characterized in that: The straight cylinder (2) is connected with a plurality of fixing ears (14).

8. A low-nitrogen gas burner according to claim 1, characterized in that: The flame stabilizer plate (4) is annularly connected with a plurality of rotational flow sheets (15).

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