A low-nitrogen natural gas combustion device

Abstract

The utility model discloses a low-nitrogen natural gas combustion device, which comprises a combustion cylinder, a gas cylinder arranged in the combustion cylinder, a first-level gas nozzle arranged at the head end of the gas cylinder, a mixing chamber arranged in the combustion cylinder, a connector connecting the combustion cylinder and the gas cylinder, and a variable regulator arranged between the combustion cylinder and the gas cylinder to adjust the gas pressure; a combustion air space is formed between the gas cylinder and the combustion cylinder. The smoke in the furnace is returned to the mixing chamber in the reflow zone to mix with the introduced combustion air, the oxygen content is reduced and the fuel is mixed and burned, and the ratio of the combustion air is achieved through the variable regulator, so as to ensure the normal low-nitrogen combustion and the combustion quality.

Description

Technical Field

[0001] The utility model relates to the field of natural gas processing applications, in particular to a low-nitrogen natural gas combustion device. Background Art

[0002] In the prior art, current natural gas combustion devices all use external flue gas circulation to achieve low-nitrogen combustion, which requires additional power and pipelines during use, increasing operating costs for users.

[0003] How to solve the above technical problems is a technical challenge that needs to be considered urgently at this stage.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes a low-nitrogen natural gas combustion device to achieve the purpose of ensuring the normal low-nitrogen combustion and ensuring the combustion quality.

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] A low-nitrogen natural gas combustion device comprises a combustion cylinder, a fuel gas cylinder arranged in the combustion cylinder, a first-stage gas nozzle arranged at the head end of the fuel gas cylinder, a mixing chamber arranged in the combustion cylinder, a connector connecting the combustion cylinder and the fuel gas cylinder, and a variable regulator arranged between the combustion cylinder and the fuel gas cylinder to adjust the gas pressure; a combustion-supporting air space is formed between the fuel gas cylinder and the combustion cylinder.

[0008] The utility model returns the smoke in the furnace to the mixing chamber in the reflux zone to mix with the introduced combustion-supporting air, reduces the oxygen content and mixes with the fuel for combustion, and realizes the proportion of the combustion-supporting air through a variable regulator, thereby achieving the purpose of ensuring the normal low-nitrogen combustion and ensuring the combustion quality.

[0009] Further preferably, a secondary burner is provided at the end of the connector.

[0010] As a further preferred embodiment, the variable regulator is provided with an adjusting rod, and the adjusting rod can drive the variable regulator to move. The variable regulator can be adjusted conveniently by providing the adjusting rod.

[0011] Further preferably, the connector includes a columnar portion and a truncated cone portion arranged at the end of the columnar portion, the columnar portion and the truncated cone portion are connected, the truncated cone portion and the cylindrical portion are both surrounded by an outer wall and an inner wall, a flow cavity is formed between the inner wall and the outer wall, and the hollow space surrounded by the inner wall is used to place the head end of the gas cylinder and the first-stage burner nozzle;

[0012] The head end of the fuel gas cylinder passes through the top of the truncated cone portion and is connected to the first-stage burner.

[0013] The utility model has the following advantages:

[0014] 1. The utility model returns the smoke in the furnace to the mixing chamber in the reflux zone to mix with the introduced combustion-supporting air, reduces the oxygen content and mixes it with the fuel for combustion, and realizes the proportion of the combustion-supporting air through a variable regulator, so as to ensure the normal low-nitrogen combustion and the combustion quality.

[0015] 2. The utility model facilitates the adjustment of the variable regulator by providing an adjustment rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0017] Figure 1 This is a structural schematic diagram of a low-nitrogen natural gas combustion device disclosed in an embodiment of the utility model;

[0018] The numbers and letters in the figure represent the corresponding component names:

[0019] 1. Combustion cylinder 2. Gas cylinder 3. First-stage gas nozzle 4. Mixing chamber 51. Columnar part 52. Cone part

[0020] 6. Variable regulator 7. Combustion air space 8. Secondary burner 9. Adjustment rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] The utility model provides a low-nitrogen natural gas combustion device, whose working principle is to return the smoke in the furnace to the mixing chamber in the reflux zone to mix with the introduced combustion-supporting air, reduce the oxygen content and mix it with the fuel for combustion, and realize the proportion of the combustion-supporting air through a variable regulator, so as to ensure the normal low-nitrogen combustion and the combustion quality.

[0023] The present invention is further described in detail below in conjunction with embodiments and specific implementation methods.

[0024] like Figure 1 As shown, a low-nitrogen natural gas combustion device includes a combustion cylinder 1, a fuel gas cylinder 2 arranged in the combustion cylinder, a first-stage gas nozzle 3 arranged at the head end of the fuel gas cylinder, a mixing chamber 4 arranged in the combustion cylinder, a connector connecting the combustion cylinder and the fuel gas cylinder, and a variable regulator 6 arranged between the combustion cylinder and the fuel gas cylinder to adjust the gas pressure; a combustion-supporting air space 7 is formed between the fuel gas cylinder and the combustion cylinder.

[0025] A secondary burner 8 is provided at the end of the connector.

[0026] The variable regulator is provided with an adjusting rod 9, and the adjusting rod can drive the variable regulator to move.

[0027] The connector includes a columnar portion 51 and a truncated cone portion 52 arranged at the end of the columnar portion, the columnar portion and the truncated cone portion are connected, the truncated cone portion and the cylindrical portion are both surrounded by an outer wall and an inner wall, a flow cavity is formed between the inner wall and the outer wall, and the hollow space surrounded by the inner wall is used to place the head end of the gas cylinder and the first-level burner nozzle; the head end of the gas cylinder body passes through the top of the truncated cone portion and is connected to the first-level burner nozzle.

[0028] The specific use steps of the utility model are as follows: Figure 1 As shown, in actual use, depending on the gas pressure, the flue gas in the furnace is preferentially returned to the mixing chamber 4 through the connector, mixed with the delivered combustion-supporting air, and then mixed with the fuel for combustion after the oxygen content is reduced, thereby achieving the purpose of low-nitrogen combustion.

[0029] When the fuel changes and low-nitrogen combustion cannot be achieved through reflux, the position of the variable regulator 6 is adjusted by the adjusting rod, thereby adjusting the amount of combustion air introduced to meet the low-nitrogen combustion indicators (a limit column for limiting the position of the variable regulator can be provided on the cylindrical part to avoid the variable regulator being removed due to equipment failure or human omission during the adjustment process, thereby ensuring production safety).

[0030] Through the above method, the utility model provides a low-nitrogen natural gas combustion device, which returns the smoke in the furnace to the mixing chamber in the reflux zone to mix with the introduced combustion air, reduces the oxygen content and mixes it with the fuel for combustion, and realizes the proportion of the combustion air through a variable regulator, thereby achieving the purpose of ensuring the normal progress of low-nitrogen combustion and ensuring the combustion quality.

[0031] The above is only a preferred implementation of a low-nitrogen natural gas combustion device disclosed in the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A low-nitrogen natural gas combustion device, characterized in that: It includes a combustion cylinder, a gas cylinder arranged in the combustion cylinder, a first-level gas nozzle arranged at the head end of the gas cylinder, a mixing chamber arranged in the combustion cylinder, a connector connecting the combustion cylinder and the gas cylinder, and a variable regulator arranged between the combustion cylinder and the gas cylinder to adjust the gas pressure; a combustion-supporting air space is formed between the gas cylinder and the combustion cylinder.

2. A low-nitrogen natural gas combustion device according to claim 1, characterized in that: A secondary burner is provided at the end of the connector.

3. A low-nitrogen natural gas combustion device according to claim 1, characterized in that: The variable regulator is provided with an adjusting rod, and the adjusting rod can drive the variable regulator to move.

4. A low-nitrogen natural gas combustion device according to claim 3, characterized in that: The connector includes a columnar portion and a truncated cone portion arranged at the end of the columnar portion, the columnar portion and the truncated cone portion are connected, the truncated cone portion and the cylindrical portion are both surrounded by an outer wall and an inner wall, a flow cavity is formed between the inner wall and the outer wall, and the hollow space surrounded by the inner wall is used to place the head end of the combustion cylinder and the first-stage burner; The head end of the fuel gas cylinder passes through the top of the truncated cone portion and is connected to the first-stage burner.

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