Coke oven gas low-nitrogen combustor

Abstract

The utility model discloses a coke oven gas low-nitrogen combustor which comprises a combustor body, a hearth is arranged in the combustor body, an air inducing assembly is correspondingly arranged on the left side of the combustor body, and a combustor assembly communicated with the air inducing assembly is correspondingly arranged on the left side of the air inducing assembly. A tertiary air inducing pipe and a secondary air inducing pipe are arranged on the air inducing assembly; an igniter is arranged in the combustor assembly, a fuel gas leading-in pipe is correspondingly arranged on the shell, and a primary air leading-in pipe is further arranged on the combustor assembly. According to the device, primary inlet air, secondary inlet air and tertiary inlet air are arranged in the gas inlet and ignition stages, and are fully mixed and ignited in the air inducing assembly, so that the combustion efficiency and quality are improved; according to the device, the over-fire air ring and the over-fire air pipe for air inlet are arranged in the hearth, over-fire air can be introduced for air supplementation in the combustion stage in the hearth, the uniformity of combustion air and fuel distribution is guaranteed, and fuel gas and main combustion air are fully mixed and fully combusted.

Description

Technical Field

[0001] The utility model relates to burner technical equipment in the technical field of environmental protection, in particular to a coke oven gas low-nitrogen burner. Background Art

[0002] In the prior art, NOx generated by coke oven gas includes thermal NOx, rapid NOx and fuel NOx; among them, thermal NOx is mainly generated by the high temperature (above 1500°C) generated by fuel combustion, which oxidizes N in the air into NOx, and its emission is affected by combustion temperature, oxygen concentration and residence time.

[0003] Fast NOx is generated when the hydrocarbon fuel in the mixture is too rich. Usually, it is only considered when the hydrocarbon fuel without nitrogen is burned at low temperature. Fuel NOx is mainly generated by the oxidation of nitrogen in the fuel during the combustion process. Its generation is mainly related to the atmosphere of fuel combustion.

[0004] For low-nitrogen gas boilers, the calorific value of the fuel is high, so the flame temperature required for combustion is also high. However, in the specific low-nitrogen combustion process, due to insufficient external air, uneven gas mixing, and uneven fuel distribution, it is easy to cause incomplete low-nitrogen combustion and substandard flame temperature, which affects the working quality and efficiency of the burner.

[0005] Therefore, in order to solve the above problems, it is necessary to develop a low-nitrogen burner with a reasonable structure, sufficient external air supply and uniform gas mixing. Utility Model Content

[0006] The purpose of the utility model is to provide a coke oven gas low nitrogen burner to address the deficiencies in the prior art; its technical solution is as follows:

[0007] A coke oven gas low nitrogen burner comprises a burner body, a furnace is arranged inside the burner body, an induced draft assembly is arranged on the left side of the burner body, and a connected burner assembly is arranged on the left side of the induced draft assembly; a tertiary induced draft pipe and a secondary induced draft pipe are arranged on the induced draft assembly; an igniter is arranged inside the burner assembly, a gas introduction pipe is arranged on the shell, and a primary induced draft pipe is also arranged on the burner assembly;

[0008] The furnace of the burner body is also provided with an annular burnout air ring; the burnout air ring is an annular tube structure, fixed closely to the inner wall of the furnace, and the inner wall end face of the burnout air ring is provided with an air outlet, and the position of the air outlet is aligned with the combustion position inside the furnace;

[0009] A burnout air duct is also provided on the outside of the burner body; the burnout air duct extends into the furnace and communicates with the burnout air ring, sends the burnout air input from the outside into the burnout air ring, and sprays it into the combustion position through the air outlet.

[0010] Furthermore, the burnout air duct is provided with four cross-shaped pipe bodies, and an electric valve is installed on each pipe body.

[0011] Furthermore, electric valves are correspondingly provided on the primary air duct, the secondary air duct, the tertiary air duct and the gas inlet pipe.

[0012] Furthermore, four wind body partitions are arranged in the burnout air ring, and the space in the burnout air ring is divided into four areas by the four wind body partitions, and each area is connected to a corresponding burnout air duct.

[0013] Furthermore, the burnout air ring is fixed to the furnace side wall of the burner body by means of welding parts.

[0014] Furthermore, four air ducts are arranged at the outer edge of the left end of the burner body; the four air ducts extend horizontally into the furnace, and air outlet holes are arranged on the four air ducts, and the positions of the air outlet holes are all aligned with the inner combustion position.

[0015] Furthermore, there are six quaternary air ducts in total, which are evenly spaced on the left side of the burner body, and the air outlet holes on each quaternary air duct are also evenly spaced; and electric valves are correspondingly provided on the quaternary air ducts.

[0016] Beneficial effects: The utility model has the following beneficial effects:

[0017] 1) The device is equipped with primary, secondary and tertiary air inlets during the gas intake and ignition stages, which are fully mixed and ignited in the induced draft assembly to increase combustion efficiency and quality;

[0018] 2) This device is equipped with a burnout air ring and a burnout air duct for air inlet in the furnace, which can introduce burnout air for air replenishment during the combustion stage in the furnace, ensuring the uniformity of the distribution of combustion air and fuel, so that the gas and main combustion air are fully mixed and fully burned;

[0019] 3) In this device, the burnout air ring is provided with an air body partition to divide its internal space into four parts, and the air outlets are evenly arranged, so that the air supply is more uniform and the combustion is thorough;

[0020] 4) In this device, a quadruple duct is provided at the left end of the burner body and is laterally inserted into the furnace. The quadruple duct is also provided with air outlet holes. During actual combustion, air can be added into the furnace through the quadruple duct, thereby further increasing the combustion efficiency and combustion quality, avoiding excessive center temperature, and increasing the combustion life of the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the structural diagram of the utility model;

[0022] Figure 2 for Figure 1 Middle AA section view;

[0023] Figure 3 It is a top view of the utility model;

[0024] Figure 4 for Figure 3 Middle BB section view. DETAILED DESCRIPTION

[0025] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, a coke oven gas low nitrogen burner of the present embodiment comprises a burner body 1, a furnace 2 is arranged inside the burner body 1, an induced draft assembly 3 is arranged on the left side of the burner body 1, and a connected burner assembly 4 is arranged on the left side of the induced draft assembly 3; a tertiary induced draft pipe 103 and a secondary induced draft pipe 102 are arranged on the induced draft assembly 3 of the present embodiment; an igniter is arranged inside the burner assembly 4 of the present embodiment, and a gas introduction pipe 5 is arranged on the shell accordingly, and a primary induced draft pipe 101 is also arranged on the burner assembly 4;

[0028] In the burner body 1 of the present embodiment, a ring-shaped burnout air ring 6 is further provided in the furnace 2; the burnout air ring 6 is a ring-shaped tube structure, which is closely fixed on the inner wall of the furnace 2, and an air outlet 7 is provided on the inner wall end face of the burnout air ring 6, and the position of the air outlet 7 is aligned with the combustion position inside the furnace 2;

[0029] A burnout air duct 8 is also provided on the outside of the burner body 1 of the present embodiment; the burnout air duct 8 of the present embodiment extends into the interior of the furnace 2 and is connected with the burnout air ring 6 of the present embodiment, and sends the burnout air input from the outside into the burnout air ring 6, and is sprayed into the combustion position through the air outlet 7 accordingly.

[0030] The burnout air duct 8 of this embodiment is provided with four cross-shaped pipe bodies, and an electric valve 9 is installed on each pipe body.

[0031] In this embodiment, electric valves 9 are correspondingly provided on the primary induced air duct 101 , the secondary induced air duct 102 , the tertiary induced air duct 103 and the gas inlet pipe 5 .

[0032] In the present embodiment, four air baffles 10 are further provided in the burnout air ring 6 , and the space in the burnout air ring 6 is divided into four areas by the four air baffles 10 , and each area is connected to a corresponding burnout air duct 8 .

[0033] The burnout air ring 6 of this embodiment is fixed to the side wall of the furnace 2 of the burner body 1 by means of welding parts.

[0034] The technical solution of this embodiment is to first set up a pipeline mechanism for primary air inlet, secondary air inlet and tertiary air inlet at the gas inlet end, and provide sufficient air to mix with the gas during the gas entry and ignition stage, so as to stabilize the heat flux of the entire furnace, so that the overall mechanism has a good combustion foundation in the initial combustion stage.

[0035] The combustion in the furnace is specifically achieved through the burnout air mechanism. In this device, a burnout air ring is set in the furnace, which is actually a circle of air duct-shaped structure. A burnout air duct is set outside the burner body, and the burnout air duct is connected inwardly with the burnout air ring. An air outlet is set on the inner section of the burnout air ring, and the position of the burnout air ring is consistent with the combustion position inside the furnace.

[0036] During specific operation, the burnout air duct replenishes air into the burnout air ring, which mixes with the small amount of unburned fuel remaining in the furnace. After sufficient mixing, the air is burned, which makes the combustion more complete and thorough, thereby reducing the emission of thermal NOx and extending the service life of the burner.

[0037] Example 2

[0038] like Figure 3 and Figure 4 As shown, a coke oven gas low nitrogen burner of the present embodiment comprises a burner body 1, a furnace 2 is arranged inside the burner body 1, an induced draft assembly 3 is arranged on the left side of the burner body 1, and a connected burner assembly 4 is arranged on the left side of the induced draft assembly 3; a tertiary induced draft pipe 103 and a secondary induced draft pipe 102 are arranged on the induced draft assembly 3 of the present embodiment; an igniter is arranged inside the burner assembly 4 of the present embodiment, and a gas introduction pipe 5 is arranged on the shell accordingly, and a primary induced draft pipe 101 is also arranged on the burner assembly 4;

[0039] In the burner body 1 of the present embodiment, a ring-shaped burnout air ring 6 is further provided in the furnace 2; the burnout air ring 6 is a ring-shaped tube structure, which is closely fixed on the inner wall of the furnace 2, and an air outlet 7 is provided on the inner wall end face of the burnout air ring 6, and the position of the air outlet 7 is aligned with the combustion position inside the furnace 2;

[0040] A burnout air duct 8 is also provided on the outside of the burner body 1 of the present embodiment; the burnout air duct 8 of the present embodiment extends into the interior of the furnace 2 and is connected with the burnout air ring 6 of the present embodiment, and sends the burnout air input from the outside into the burnout air ring 6, and is sprayed into the combustion position through the air outlet 7 accordingly.

[0041] The burnout air duct 8 of this embodiment is provided with four cross-shaped pipe bodies, and an electric valve 9 is installed on each pipe body.

[0042] In this embodiment, electric valves 9 are correspondingly provided on the primary induced air duct 101 , the secondary induced air duct 102 , the tertiary induced air duct 103 and the gas inlet pipe 5 .

[0043] In the present embodiment, four air baffles 10 are further provided in the burnout air ring 6 , and the space in the burnout air ring 6 is divided into four areas by the four air baffles 10 , and each area is connected to a corresponding burnout air duct 8 .

[0044] The burnout air ring 6 of this embodiment is fixed to the side wall of the furnace 2 of the burner body 1 by means of welding parts.

[0045] In this embodiment, a fourth air duct 104 is further provided at the outer edge of the left end of the burner body 1; the fourth air duct 104 of this embodiment extends horizontally into the furnace 2, and air outlet holes 7 are provided on the fourth air duct 104, and the positions of the air outlet holes are all aligned with the inner combustion position.

[0046] In this embodiment, there are six quaternary air ducts 104, which are evenly spaced on the left side of the burner body 1. The air outlet holes 7 on each quaternary air duct 104 are also evenly spaced. In addition, the quaternary air ducts 104 of this embodiment are respectively provided with electric valves 9.

[0047] The technical solution of this embodiment is an improved design based on the technical solution of embodiment 1. In the technical solution of embodiment 1, the position of the burnout air ring corresponds to the combustion position in the furnace, but there is still a certain distance from the gas assembly on the left to the burnout air ring on the right, and no additional air supply mechanism is designed in this area, which will also affect the combustion efficiency and quality.

[0048] In the technical solution of this embodiment, a four-stage air duct is arranged at the left end of the burner body and is laterally inserted into the furnace. The four-stage air duct is also provided with air outlet holes. Therefore, during actual combustion, air can be added into the furnace through the four-stage air duct, thereby further increasing the combustion efficiency and combustion quality and avoiding excessive center temperature.

[0049] The above-mentioned specific implementation mode is only a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made according to the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A coke oven gas low nitrogen burner, characterized in that: The burner comprises a burner body (1), wherein a furnace (2) is arranged inside the burner body (1), an induced draft assembly (3) is arranged on the left side of the burner body (1), and a connected burner assembly (4) is arranged on the left side of the induced draft assembly (3); a tertiary induced draft pipe (103) and a secondary induced draft pipe (102) are arranged on the induced draft assembly (3); an igniter is arranged inside the burner assembly (4), and a gas introduction pipe (5) is arranged on the shell, and a primary induced draft pipe (101) is also arranged on the burner assembly (4); An annular burnout air ring (6) is also arranged in the furnace (2) of the burner body (1); the burnout air ring (6) is an annular tube structure, tightly fixed on the inner wall of the furnace (2), and an air outlet hole (7) is arranged on the inner wall end face of the burnout air ring (6), and the position of the air outlet hole (7) is aligned with the combustion position inside the furnace (2); A burnout air duct (8) is also provided on the outside of the burner body (1); the burnout air duct (8) extends into the interior of the furnace (2) and communicates with the burnout air ring (6), so as to deliver the burnout air input from the outside into the burnout air ring (6) and to spray the burnout air into the combustion position through the air outlet (7).

2. A coke oven gas low nitrogen burner according to claim 1, characterized in that: The burnout air duct (8) is provided with four cross-shaped pipe bodies, and an electric valve (9) is installed on each pipe body.

3. A coke oven gas low nitrogen burner according to claim 1, characterized in that: Electric valves (9) are correspondingly arranged on the primary air induced pipe (101), the secondary air induced pipe (102), the tertiary air induced pipe (103) and the gas inlet pipe (5).

4. A coke oven gas low nitrogen burner according to claim 2, characterized in that: Four air body partitions (10) are also arranged in the burnout air ring (6), and the space in the burnout air ring (6) is divided into four areas by the four air body partitions (10), and each area is connected to a corresponding burnout air duct (8).

5. The coke oven gas low nitrogen burner according to claim 1, characterized in that: The burnout air ring (6) is fixed to the side wall of the furnace (2) of the burner body (1) via a welding piece.

6. A coke oven gas low nitrogen burner according to claim 1, characterized in that: A fourth air duct (104) is also provided at the outer edge of the left end of the burner body (1); the fourth air duct (104) extends transversely into the furnace (2), and each of the fourth air ducts (104) is provided with an air outlet (7), and the positions of the air outlets are all aligned with the inner combustion position.

7. A coke oven gas low nitrogen burner according to claim 6, characterized in that: A total of six quaternary air ducts (104) are provided, which are evenly spaced on the left side of the burner body (1), and the air outlet holes (7) on each quaternary air duct (104) are also evenly spaced; and an electric valve (9) is correspondingly provided on the quaternary air duct (104).

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