Novel large-proportion adjusting type low-nitrogen-oxide-content combustor

Abstract

The utility model discloses a novel large-proportion adjusting type low-nitrogen-oxide-content combustor, and belongs to the technical field of chemical equipment. A novel large-proportion adjusting type low-nitrogen-oxide-content combustor comprises a barrel, a combustor body and a combustor body, the air supply pipe is fixedly connected to the side wall of the cylinder body, and the air supply pipe is communicated with the cylinder body; the flame path brick is fixedly connected to the cylinder body; the spray gun assembly is fixedly connected to the barrel; the output end of the spray gun assembly faces the flame path brick; the gas collection chamber is fixedly connected to the spray gun assembly and is communicated with the spray gun assembly; the large-proportion fuel flow is controlled through the adjusting valve on the second spray gun, the effect of greatly adjusting the load of the combustor is achieved, CO production and excessive oxygen content under small load are avoided due to the fact that a high-temperature combustion area is generated through the design of the flame path brick inner gun, the effect of effectively inhibiting generation of nitric oxide can be achieved through the grading design, and the combustion efficiency is improved. And the heating efficiency of the heating furnace is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a novel large-proportion regulation type low nitrogen oxide content burner. Background Art

[0002] At present, in the field of petrochemical industry, industrial furnaces used in petrochemical plants are all equipped with burners. In the prior art, the burners used in industrial furnaces are composed of components such as a burner shell, a flue brick, and a fuel spray gun.

[0003] The working principle of the burner is: the fuel is mixed with the combustion air in the fire channel bricks, the flame burns in the radiation chamber of the heating furnace, and the heated medium in the furnace tube is heated by the radiation heat transfer of the flame. The load of the heating furnace varies greatly during operation according to different process requirements. The current low NOX burner lacks stability when running at low load. The large amount of CO caused by incomplete combustion due to the reduction in gas injection speed and the increase in oxygen content may reduce the efficiency of the heating furnace. Utility Model Content

[0004] The purpose of the present invention is to solve the problems raised in the above background technology and to propose a new type of large-proportion regulation type low nitrogen oxide content burner.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A new type of large-ratio modulation type low nitrogen oxide content burner, including:

[0007] Cylinder;

[0008] An air supply pipe is fixedly connected to the side wall of the cylinder and communicates with the cylinder;

[0009] Fire channel bricks, fixedly connected to the cylinder;

[0010] A spray gun assembly is fixedly connected to the barrel;

[0011] The output end of the spray gun assembly faces the flue brick;

[0012] The air collecting chamber is fixedly connected to the spray gun assembly and communicated with the spray gun assembly.

[0013] Preferably, the spray gun assembly includes a symmetrically arranged first spray gun, and the first spray gun is placed inside the flue brick.

[0014] Furthermore, the spray gun assembly also includes a symmetrically arranged second spray gun, and the second spray gun is placed outside the flue brick.

[0015] Furthermore, the gas collecting chamber is fixedly connected to the first spray gun, and the gas collecting chamber is connected to the second spray gun through a connecting pipe.

[0016] Furthermore, the second spray gun is connected to a regulating valve.

[0017] Compared with the existing technology, the present invention provides a new type of large-proportion modulation type low nitrogen oxide content burner, which has the following beneficial effects:

[0018] The parts not involved in this device are the same as the existing technology or can be implemented by using existing technology. The utility model uses the regulating valve on the second spray gun to control the large-proportion fuel flow, which has the effect of significantly adjusting the burner load. The high-temperature combustion zone generated by the gun design inside the fire channel brick avoids CO production and excessive oxygen content under low load, and the graded design can effectively inhibit the generation of nitrogen oxides, thereby effectively improving the heating efficiency of the heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a new large-proportion regulation-type low-nitrogen oxide content burner proposed in the utility model.

[0020] In the figure: 1. Cylinder; 2. Second spray gun; 3. Fire channel brick; 4. First spray gun; 5. Regulating valve; 6. Gas collecting chamber; 7. Gas supply pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Example:

[0023] Reference Figure 1 , a new type of large-ratio modulation low nitrogen oxide content burner, including:

[0024] Cylinder 1;

[0025] The cylinder 1 is provided with an inner cavity;

[0026] The air supply pipe 7 is fixedly connected to the side wall of the cylinder 1 and is in communication with the cylinder 1;

[0027] Flue bricks 3, fixedly connected to the cylinder 1;

[0028] An injection channel is provided on the fire brick 3, and the injection channel is connected to the inner cavity;

[0029] The spray gun assembly is fixedly connected to the barrel 1;

[0030] The output end of the spray gun assembly faces the fire brick 3;

[0031] The air collecting chamber 6 is fixedly connected to the spray gun assembly and communicated with the spray gun assembly.

[0032] It should be noted that the cylinder 1 is a metal cylinder, specifically a stainless steel cylinder available on the market, and the cylinder 1 is integrally formed using a casting process.

[0033] The spray gun assembly includes a symmetrically arranged first spray gun 4 , which is placed inside the flue brick 3 .

[0034] The spray gun assembly further includes a symmetrically arranged second spray gun 2 , which is placed outside the flue brick 3 .

[0035] Reference Figure 1 When in use, fresh combustion air is provided to the inner cavity of the cylinder 1 through the air supply pipe 7; the fuel is distributed to the first spray gun 4 and the second spray gun 2 by the air collecting chamber 6, the second spray gun 2 sprays fuel along the outer wall of the flue brick 3 toward the center, and the first spray gun 4 sprays fuel along the inner wall of the flue brick 3.

[0036] The burner gun mixes with the combustion air and the combustion flame is sprayed into the furnace. If the load is reduced, the fuel regulating valve 5 added to the second gun 2 can be adjusted to change the fuel injection flow rate to ensure the injection speed. If it is adjusted to the minimum load, the fuel regulating valve 5 added to the second gun 2 will be completely closed. The fuel of the first gun 4 in the flue brick 3 will be sprayed along the inner wall of the flue brick 3 and mixed with the combustion air to burn, forming a high-temperature zone in the flue brick 3. The fuel is completely burned in the flue brick 3 to avoid CO emissions caused by incomplete combustion. In addition, the high-temperature zone formed in the flue brick 3 consumes the oxygen of the combustion air and reduces the excess oxygen content.

[0037] The air collecting chamber 6 is fixedly connected to the first spray gun 4, and the air collecting chamber 6 is connected to the second spray gun 2 through a connecting pipe.

[0038] The second spray gun 2 is connected to a regulating valve 5 .

[0039] This application uses the regulating valve 5 on the second spray gun 2 to control a large proportion of fuel flow, thereby significantly adjusting the burner load. The high-temperature combustion zone generated by the gun design inside the fire brick 3 avoids CO production and excessive oxygen content under low load, and the graded design can effectively inhibit the generation of nitrogen oxides, thereby effectively improving the heating efficiency of the heating furnace.

[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of large-proportion modulation type low nitrogen oxide content burner, characterized in that: include: Cylinder (1); An air supply pipe (7) is fixedly connected to the side wall of the cylinder (1), and the air supply pipe (7) is in communication with the cylinder (1); Flue bricks (3) are fixedly connected to the cylinder (1); A spray gun assembly is fixedly connected to the barrel (1); The output end of the spray gun assembly faces the flue brick (3), and the spray gun assembly and the flue brick (3) are in contact with each other; The air collecting chamber (6) is fixedly connected to the spray gun assembly and communicated with the spray gun assembly.

2. A novel large-ratio modulation type low nitrogen oxide content burner according to claim 1, characterized in that: The spray gun assembly comprises a symmetrically arranged first spray gun (4), and the first spray gun (4) is placed inside the flue brick (3).

3. A novel large-ratio modulation type low nitrogen oxide content burner according to claim 2, characterized in that: The spray gun assembly further comprises a symmetrically arranged second spray gun (2), wherein the second spray gun (2) is placed outside the flue brick (3).

4. A novel large-ratio modulation type low nitrogen oxide content burner according to claim 3, characterized in that: The gas collecting chamber (6) and the first spray gun (4) are fixedly connected, and the gas collecting chamber (6) is connected to the second spray gun (2) through a connecting pipe.

5. A novel large-ratio modulation type low nitrogen oxide content burner according to claim 4, characterized in that: The second spray gun (2) is connected to a regulating valve (5).

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