Burner of heating furnace

Abstract

The utility model discloses a heating furnace burner which comprises a burner shell internally provided with a fuel cavity, an air inner cylinder internally provided with an air flow channel and a grading gun head assembly, and the burner shell is arranged at the bottom of the air inner cylinder in a sleeved mode. An ignition rod is arranged in the air inner cylinder, a spinning disk is arranged at the bottom end of the ignition rod, and refractory brick assemblies are arranged at the bottoms of the air inner cylinder and the combustor shell; according to the utility model, air forms a rotating fluid when passing through the spinning disk through the spinning disk, so that the air and fuel are mixed more sufficiently, and meanwhile, the fuel can be graded by the grading gun head of the grading gun head assembly, so that the retention time of the fuel in the combustor is shortened, the adaptability of fuel types and loads is improved, the combustion efficiency is improved, and pollutants are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating furnace combustor technical field, concretely relates to a kind of heating furnace combustor. BACKGROUND

[0002] Combustor is the important component in heating furnace. It is the region that fuel and air mixed combustion reaction, produce heat, fuel and air enter combustor after with specific way occurs mixing and combustion, the way of mixing determines the utilization efficiency of fuel, the stability of heating furnace work and the pros and cons of heating effect.

[0003] Combustor needs to let fuel and air mix fully, uniformly, also guarantee the stability of combustion, avoid appearing backfire, off fire etc. Phenomenon, also consider the problem of pollutant emission. Often advanced combustion technology such as staged combustion, cyclone combustion is used.

[0004] Traditional fuel staged combustor can reduce pollutant emission by reducing the residence time of fuel in combustor, also improve the adaptability of fuel, but there is the shortcoming that fuel and air are not mixed uniformly, easy to produce local high temperature zone;And although cyclone combustor enhances turbulence intensity, promotes mixing, single fuel channel is prone to flame instability phenomenon under high load, and combustion efficiency will decrease under low load. SUMMARY

[0005] In view of above-mentioned problem in the prior art, the utility model provides a kind of heating furnace combustor, solve the problem that fuel and air are not mixed uniformly when existing heating furnace combustor is staged combustion.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0007] Provide a kind of heating furnace combustor, it includes the combustor shell of being equipped with fuel cavity, air inner tube of being equipped with air flow channel, and staged gun head assembly, combustor shell is set in the bottom of air inner tube;Air inner tube is provided with ignition rod, and the bottom end of ignition rod is provided with cyclone sheet, and air inner tube and the bottom of combustor shell are provided with refractory brick assembly.

[0008] The utility model passes through cyclone sheet, makes air form rotating fluid when passing through cyclone sheet, so that air and fuel mix more fully, simultaneously, the staged gun head of staged gun head assembly can be staged to fuel, to reduce the residence time of fuel in combustor, improve the adaptability of fuel type and load, improve combustion efficiency, reduce pollutant.

[0009] Further, the refractory brick assembly comprises a first flange, a middle portion of a lower surface of the first flange is provided with a refractory brick, and a periphery of the refractory brick is provided with a refractory brick shell fixed on the lower surface of the first flange; a bottom end of the air inner cylinder is in communication with a middle portion reserved hole of the first flange.

[0010] Further, a second flange is arranged on an outer edge of the bottom end of the burner shell, and the first flange and the second flange are connected through bolts.

[0011] Further, the staged gun head assembly comprises a plurality of primary gun heads, the plurality of primary gun heads are arranged in a ring shape on a side wall of the air inner cylinder below the ignition rod, and the primary gun heads are in communication with the fuel cavity.

[0012] Further, the staged gun head assembly comprises a plurality of secondary gun heads, the plurality of secondary gun heads are arranged in a ring shape on the first flange, and the secondary gun heads are in communication with the fuel cavity.

[0013] Further, an air inlet connecting pipe is arranged on the side wall of the air inner cylinder and is in communication with the air flow channel.

[0014] Further, a fuel inlet connecting pipe is arranged on the side wall of the burner shell and is in communication with the fuel cavity.

[0015] The utility model discloses a heating furnace burner, and has the beneficial effects that:

[0016] The utility model discloses a heating furnace burner, and has the beneficial effects that: BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a sectional structure schematic view of the heating furnace burner of the utility model.

[0018] Fig. 2 It is a sectional structure schematic view of the primary gun head and the secondary gun head of the utility model.

[0019] Wherein, 1, burner shell, 11, fuel cavity, 12, second flange, 13, fuel inlet connecting pipe, 2, air inner cylinder, 21, air flow channel, 22, air inlet connecting pipe, 3, ignition rod, 41, primary gun head, 42, secondary gun head, 5, refractory brick assembly, 51, first flange, 52, refractory brick, 53, refractory brick shell, 6, cyclone piece. DETAILED DESCRIPTION

[0020] The utility model is described in the light of the specific embodiment, so as to make the technical personnel in the technical field understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific embodiment, for the ordinary skilled in the art, as long as various changes are within the scope of the appended claims and the spirit and scope of the utility model, these changes are obvious, all the utility model creations using the utility model concept are within the scope of protection.

[0021] Embodiment 1

[0022] Reference Figs. 1-2 The embodiment provides a heating furnace burner, which aims at solving the problem of uneven mixing of fuel and air in the existing heating furnace burner during staged combustion, and the specific structure in the embodiment will be described in detail below.

[0023] A heating furnace burner comprises a burner shell 1 provided with a fuel cavity 11, an air inner cylinder 2 provided with an air flow channel 21, and a staged gun head assembly.

[0024] Specifically, the burner shell 1 is sleeved on the bottom of the air inner cylinder 2, and the ignition rod 3 is arranged in the air inner cylinder 2; the bottom end of the ignition rod 3 is provided with a swirl vane 6, and the bottom of the air inner cylinder 2 and the burner shell 1 is provided with a refractory brick assembly 5.

[0025] Specifically, the sidewall of the air inner cylinder 2 is provided with an air inlet connector 22 communicated with the air flow channel 21. The sidewall of the burner shell 1 is provided with a fuel inlet connector 13 communicated with the fuel cavity 11.

[0026] In the embodiment, the material of the ignition rod 3 and the swirl vane 6 is 304L steel, the swirl vane 6 is a circular plate fixedly arranged at the bottom end of the ignition rod 3, a plurality of swirl channels are uniformly and obliquely arranged on the periphery of the circular plate, the number of the swirl channels is 12, and the offset angle is 45°, so that the air entering the air inner cylinder 2 from the air inlet connector 22 forms a high-speed rotating fluid after passing through the swirl vane 6, and the staged gun head of the staged gun head assembly can stage the fuel to reduce the residence time of the fuel in the burner, improve the adaptability of the fuel type and load, improve the combustion efficiency, and reduce the pollutants.

[0027] Specifically, the refractory brick assembly 5 comprises a first flange 51, the middle part of the lower surface of the first flange 51 is provided with a refractory brick 52, and the periphery of the refractory brick 52 is provided with a refractory brick shell 53 fixedly arranged on the lower surface of the first flange 51; the bottom end of the air inner cylinder 2 is communicated with the middle reserved hole of the first flange 51.

[0028] The second flange 12 is arranged on the outer edge of the bottom end of the burner shell 1, and the second flange 12 is connected with the first flange 51 through bolts.

[0029] In the embodiment, the first flange 51, the air inner cylinder 2 and the firebrick 52 are coaxially arranged, the bottom end of the air inner cylinder 2 is in communication with the middle reserved hole of the first flange 51, so that the air inner cylinder 2 is in communication with the firebrick 52, the second flange 12 is matched with the first flange 51, and the corresponding threaded holes are formed in the second flange 12 and the first flange 51, so that the second flange 12 and the first flange 51 are connected by bolts, and then the first flange 51 and the combustor shell 1 form the fuel cavity 11. The firebrick 52 is made of high-aluminum firebrick.

[0030] Specifically, the staged gun head assembly includes a plurality of primary gun heads 41, the plurality of primary gun heads 41 are annularly and uniformly arranged on the side wall of the air inner cylinder 2 below the ignition rod 3, and the primary gun heads 41 are in communication with the fuel cavity 11.

[0031] The staged gun head assembly includes a plurality of secondary gun heads 42, the plurality of secondary gun heads 42 are annularly and uniformly arranged on the first flange 51, and the secondary gun heads 42 are in communication with the fuel cavity 11.

[0032] In the embodiment, the material of the primary gun head 41 is 310S steel, and a total of four primary gun heads 41 are arranged, the four primary gun heads 41 are uniformly arranged on the side wall of the air inner cylinder 2, and the four primary gun heads 41 are all in communication with the fuel cavity 11 to receive fuel, and a part of the fuel is mixed with the rotating air to occur combustion reaction through the primary gun head 41.

[0033] The material of the secondary gun head 42 is 310S steel, and a total of eight secondary gun heads 42 are arranged, the eight secondary gun heads 42 are uniformly arranged on the first flange 51, and the eight secondary gun heads 42 are all in communication with the fuel cavity 11, and the remaining fuel is contacted with the air and the product after the primary fuel occurs combustion through the secondary gun head 42 to occur secondary combustion.

[0034] Optionally, the inner diameter of the primary gun head 41 is 14 mm, the jet diameter is 2.4 mm, the inner diameter of the secondary gun head 42 is 28 mm, and the jet diameter is 2 mm, and the jet of the primary gun head 41 and the secondary gun head 42 is all formed with a deflection angle of 16.5° to the center.

[0035] Although the specific embodiments of the utility model are described in detail in combination with the drawings, it should not be understood as the limitation of the protection scope of the patent. Various modifications and changes made by those skilled in the art within the scope described in the claims still belong to the protection scope of the patent.

Claims

1. A heating furnace burner, characterized in that: It includes a burner housing (1) with a fuel chamber (11), an air cylinder (2) with an air flow channel (21), and a staged nozzle assembly; The burner housing (1) is fitted onto the bottom of the air inner cylinder (2); an ignition rod (3) is provided inside the air inner cylinder (2); and a swirl vane (6) is provided at the bottom of the ignition rod (3); and a refractory brick assembly (5) is provided at the bottom of the air inner cylinder (2) and the burner housing (1).

2. The furnace burner according to claim 1, characterized in that: The refractory brick assembly (5) includes a first flange (51), a refractory brick (52) is provided in the middle of the lower surface of the first flange (51), and a refractory brick shell (53) is provided around the refractory brick (52) and fixed to the lower surface of the first flange (51). The bottom end of the air inner cylinder (2) is connected to the reserved hole in the middle of the first flange (51).

3. The furnace burner according to claim 2, characterized in that: A second flange (12) is provided on the outer edge of the bottom end of the burner housing (1), and the second flange (12) is connected to the first flange (51) by bolts.

4. The furnace burner according to claim 2, characterized in that: The graded nozzle assembly includes multiple primary nozzles (41), which are arranged in a ring on the side wall of the air inner cylinder (2) below the ignition rod (3), and the primary nozzles (41) are connected to the fuel chamber (11).

5. The furnace burner according to claim 2, characterized in that: The staged nozzle assembly includes multiple secondary nozzles (42), which are evenly arranged in a ring on the first flange (51), and the secondary nozzles (42) are connected to the fuel chamber (11).

6. The furnace burner according to claim 1, characterized in that: An air inlet pipe (22) connected to the air flow channel (21) is provided on the side wall of the air inner cylinder (2).

7. The furnace burner according to claim 1, characterized in that: A fuel inlet pipe (13) communicating with the fuel chamber (11) is provided on the side wall of the burner housing (1).

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