Axial plasma staged burner

Abstract

The utility model discloses an axial plasma staged burner which comprises an outer cylinder, the outer cylinder is divided into an outer cylinder rear end, an outer cylinder middle end and an outer cylinder front end according to the medium advancing direction, the three groups of outer cylinders are sequentially combined and fixed, a first-stage cylinder is fixed inside the outer cylinder rear end, a second-stage cylinder is fixed inside the outer cylinder middle end, and the first-stage cylinder is fixed inside the outer cylinder front end. A third-stage cylinder is fixed in the rear end of the outer cylinder, and spoiler structures are fixed in the first-stage cylinder, the second-stage cylinder and the third-stage cylinder; the size of the outer cylinder middle end is between the size of the outer cylinder rear end and the size of the outer cylinder front end; each of the first-stage cylinder, the second-stage cylinder and the third-stage cylinder is of a hollow cavity structure without surfaces on two sides, and a convex plate structure for fixing is arranged on the outer side of each of the first-stage cylinder, the second-stage cylinder and the third-stage cylinder; the first-stage cylinder, the second-stage cylinder and the third-stage cylinder are sequentially connected end to end on the outer cylinder, the first-stage cylinder structure, the second-stage cylinder structure and the third-stage cylinder structure are combined, connected and fixed (in the outer cylinder), the spoilers can sequentially conduct turbulent flow, and the gradually-tightened outer cylinder structure can gradually increase the medium flow speed and improve the combustion effect.

Description

Technical Field

[0001] The utility model relates to the field of fly ash combustion devices, in particular to an axial plasma graded burner. Background Art

[0002] The traditional method of ignition of power station boilers is generally oil gun ignition. When the boiler is ignited, the oil gun is first ignited. After the oil burns in the furnace for a certain period of time, the furnace is heated to the ignition temperature of the coal powder airflow. At this time, the coal powder is blown into the furnace for oil-coal mixed combustion. When the boiler reaches a load of more than 50% and the coal powder airflow can burn stably, the fuel oil is gradually cut off to complete the boiler ignition and startup process. In order to save costs and reduce the fuel oil consumption of power station boilers, many companies at home and abroad have developed a variety of plasma ignition burners, which have been widely used in many power station boilers.

[0003] The plasma ignition burner is an internal combustion device, which uses the high-temperature plasma ejected from the plasma generator as an ignition source to directly ignite the coal powder airflow. Since the power of the plasma generator is relatively small (the power of a general plasma generator is 90-120KW), the existing plasma oil-free ignition burners are designed as staged combustion burners, that is, the high-temperature plasma ejected from the plasma generator ignites part of the coal powder in the burner to form a new ignition source with a larger thermal power, and then ignites another part of the coal powder to form another larger ignition source. Finally, this "staged ignition, step-by-step amplification" method is used to ignite all the primary coal powder airflow of the main burner. Therefore, the design quality of the plasma oil-free ignition burner is very critical to the success of the high-temperature plasma ignition of the primary coal powder airflow. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the utility model provides an axial plasma graded burner, which has three groups of cylinder-level structures, in which the first-stage cylinder, the second-stage cylinder and the third-stage cylinder structure are combined, connected and fixed (in an outer cylinder), and the spoiler can disturb the flow in turn, and the gradually tightened outer cylinder structure can gradually increase the medium flow rate and improve the combustion effect.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an axial plasma graded burner, comprising an outer cylinder, which is divided into an outer cylinder rear end, an outer cylinder middle end and an outer cylinder front end according to the forward direction of the medium, and the three groups of outer cylinders are combined and fixed in sequence, a primary cylinder is fixed inside the rear end of the outer cylinder, a secondary cylinder is fixed inside the middle end of the outer cylinder, a tertiary cylinder is fixed inside the rear end of the outer cylinder, and spoiler structures are fixed inside the primary cylinder, the secondary cylinder and the tertiary cylinder.

[0006] As a preferred technical solution of the utility model, the size of the middle end of the outer cylinder is between the size of the rear end of the outer cylinder and the size of the front end of the outer cylinder.

[0007] As a preferred technical solution of the utility model, the first-stage cylinder, the second-stage cylinder and the third-stage cylinder are all hollow cavity structures without surfaces on both sides, and convex plate structures for fixing are arranged on the outside thereof.

[0008] As a preferred technical solution of the utility model, the primary cylinder, the secondary cylinder and the tertiary cylinder are sequentially connected end to end in the outer cylinder.

[0009] As a preferred technical solution of the utility model, a primary air expansion cone is fixed to the outer side of the front end of the outer cylinder and is fixed in combination by bolts and nuts.

[0010] As a preferred technical solution of the utility model, a flange is fixed on the outer side of one end of the rear end of the outer cylinder.

[0011] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0012] In the device, three groups of cylinder-level structures are provided, wherein the first-stage cylinder, the second-stage cylinder and the third-stage cylinder structures are combined, connected and fixed (inside the outer cylinder), wherein the spoilers can perform spoiling in turn, and the gradually tightened outer cylinder structure can gradually increase the flow rate of the medium, thereby improving the combustion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a structural cross-sectional view of the utility model;

[0015] Figure 3 This is a schematic diagram of the secondary cylinder structure of the utility model;

[0016] Figure 4 It is a structural side view of the utility model.

[0017] Among them: 1. Flange; 2. Rear end of outer tube; 3. First-stage tube; 4. Second-stage tube; 5. Third-stage tube; 6. Middle end of outer tube; 7. Front end of outer tube; 8. Primary air expansion cone; 9. Bolts; 10. Nuts. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the utility model. The experimental methods in the following embodiments are conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0019] Embodiment:

[0020] like Figure 1-4 As shown, the utility model provides an axial plasma graded burner, including an outer cylinder, which is divided into an outer cylinder rear end 2, an outer cylinder middle end 6 and an outer cylinder front end 7 according to the forward direction of the medium, and the three groups of outer cylinders are combined and fixed in sequence, a primary cylinder 3 is fixed inside the outer cylinder rear end 2, a secondary cylinder 4 is fixed inside the outer cylinder middle end 6, a tertiary cylinder 5 is fixed inside the outer cylinder rear end 2, and spoiler structures are fixed inside the primary cylinder 3, the secondary cylinder 4 and the tertiary cylinder 5.

[0021] In other embodiments, the size of the middle end 6 of the outer cylinder is between the size of the rear end 2 of the outer cylinder and the front end 7 of the outer cylinder; the first-stage cylinder 3, the second-stage cylinder 4 and the third-stage cylinder 5 are all hollow cavity structures with no faces on both sides, and a convex plate structure for fixing is arranged on the outside thereof; the first-stage cylinder 3, the second-stage cylinder 4 and the third-stage cylinder 5 are connected end to end in sequence in the outer cylinder; a primary air expansion cone 8 is fixed to the outside of the front end 7 of the outer cylinder, and is combined and fixed by bolts 9 and nuts 10; a flange 1 is fixed to the outside of one end of the rear end 2 of the outer cylinder, and three groups of cylinder-level structures are set up, in which the first-stage cylinder 3, the second-stage cylinder 4 and the third-stage cylinder 5 structures are combined, connected and fixed (inside the outer cylinder), and the spoilers therein can perform spoilers in sequence, and the gradually tightened outer cylinder structure can gradually increase the flow rate of the medium, thereby improving the combustion effect.

[0022] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An axial plasma staged burner, comprising an outer cylinder, characterized in that: The outer cylinder is divided into an outer cylinder rear end (2), an outer cylinder middle end (6) and an outer cylinder front end (7) according to the forward direction of the medium, and the three groups of outer cylinders are assembled and fixed in sequence. A primary cylinder (3) is fixed inside the outer cylinder rear end (2), a secondary cylinder (4) is fixed inside the outer cylinder middle end (6), and a tertiary cylinder (5) is fixed inside the outer cylinder rear end (2). A spoiler structure is fixed inside the primary cylinder (3), the secondary cylinder (4) and the tertiary cylinder (5).

2. An axial plasma staged burner according to claim 1, characterized in that: The size of the middle end (6) of the outer cylinder is between the size of the rear end (2) of the outer cylinder and the size of the front end (7) of the outer cylinder.

3. The axial plasma staged burner according to claim 1, characterized in that: The first-stage cylinder (3), the second-stage cylinder (4) and the third-stage cylinder (5) are all hollow cavity structures without surfaces on both sides, and are all provided with convex plate structures for fixing on their outer sides.

4. The axial plasma staged burner according to claim 1, characterized in that: The primary cylinder (3), the secondary cylinder (4) and the tertiary cylinder (5) are sequentially connected end to end in the outer cylinder.

5. The axial plasma staged burner according to claim 1, characterized in that: A primary air expansion cone (8) is fixed to the outside of the front end (7) of the outer cylinder and is assembled and fixed by bolts (9) and nuts (10).

6. The axial plasma staged burner according to claim 1, characterized in that: A flange (1) is fixed on the outer side of one end of the rear end (2) of the outer cylinder.

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