A gas turbine swirl burner

Abstract

The utility model relates to the technical field of combustor discloses a gas turbine rotational flow combustor, including combustor body, the combustor body is fixedly installed with primary air pipe, the combustor body inside is provided with inner secondary air pipe and outer secondary air pipe, the primary air pipe inside is provided with mixing mechanism, the inner secondary air pipe is provided with baffle, when the device is put into use, in order to avoid the coal powder gas flow caused by centrifugal force at the elbow in the primary air pipe, the coal powder mixes unevenly, the coal powder amount at the elbow is less than the outside coal powder amount, therefore mixes the coal powder gas flowing through the elbow through setting mixing mechanism in the primary air pipe, and the baffle is used for controlling the air intake of inner secondary air pipe, makes the coal powder gas flow mixing even in the primary air pipe through this method, has better combustion effect.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a gas turbine swirl burner. Background Technology

[0002] The swirl burner is a core component of a gas turbine. It rotates the fuel-air mixture through a swirl device, utilizing centrifugal force stratification and high-temperature flue gas recirculation to achieve efficient and stable combustion.

[0003] Its technological advantages lie in improving combustion efficiency, reducing pollutant emissions, and enhancing combustion stability. Swirl burners come in various structures, such as the double-volute type and the axially movable blade type, to adapt to different load requirements. This technology is widely used in aero-engines, industrial gas turbines, and ship propulsion, and is of great significance for improving gas turbine performance and promoting efficient energy utilization.

[0004] In existing gas turbine swirl burners, pulverized coal gas enters the unit through a primary air duct. When the pulverized coal gas moves at high speed to the bend in the primary air duct, centrifugal force causes the amount of pulverized coal on the outside of the bend to be greater than that at the center. This results in uneven mixing of the pulverized coal gas entering the unit. Uneven mixing of pulverized coal and air can lead to localized areas of excessively rich or lean fuel. In areas of excessively rich fuel, incomplete combustion products such as CO and hydrocarbons may be produced due to lack of oxygen. At the same time, localized high temperatures may also promote the formation of nitrogen oxides (NOx). In areas of excessively lean fuel, combustion efficiency may decrease due to insufficient temperature. Utility Model Content

[0005] Purpose of the utility model: The purpose of this utility model is to provide a gas turbine swirl burner to overcome the above-mentioned shortcomings in the prior art.

[0006] Technical solution: A gas turbine swirl burner includes a burner body, a primary air duct fixedly installed on the burner body, an inner secondary air duct and an outer secondary air duct inside the burner body, a mixing mechanism inside the primary air duct, and a baffle on the inner secondary air duct.

[0007] As a further description of the above technical solution: a guide pipe is fixedly installed inside the primary air duct, and both ends of the guide pipe are set in a tapered flared shape.

[0008] As a further description of the above technical solution: the mixing mechanism includes a connecting ring, which is fixedly installed inside the guide pipe. Multiple guide plates are rotatably installed on the connecting ring, and a rotating rod is fixedly connected to the multiple guide plates. The rotating rod is rotatably connected to the guide pipe and the primary air duct, and a rotating disk is fixedly connected to the top of the rotating rod through the guide pipe and the primary air duct.

[0009] As a further description of the above technical solution: a drive sleeve is fixedly connected to one side of the baffle, a plurality of drive grooves are fixedly installed on the inner wall of the drive sleeve, a plurality of connecting columns are fixedly installed on the plurality of rotating disks, and the plurality of connecting columns are slidably installed inside the drive grooves respectively.

[0010] As a further description of the above technical solution: the drive sleeve is configured as a regular polygon, and the inner wall of the drive sleeve is in perpendicular contact with the top of the rotating disk.

[0011] As a further description of the above technical solution: connecting blocks are fixedly installed on both sides of the drive sleeve, and a push rod is fixedly installed on the side wall of the burner body. The output end of the push rod passes through the side wall of the burner body and is fixedly connected to one of the connecting blocks.

[0012] As a further description of the above technical solution: a limiting rod is fixedly installed inside the burner body, and the connecting block away from the push rod is slidably connected to the limiting rod.

[0013] As a further description of the above technical solution: an air inlet is fixedly installed at the bottom of the burner body.

[0014] Beneficial effects: In this device, pulverized coal gas enters the burner body through a primary air duct. A guide pipe and a mixing mechanism are installed after the bend in the primary air duct. The guide pipe directs the unevenly mixed pulverized coal gas to the mixing mechanism. The mixing mechanism causes the pulverized coal gas to swirl through a guide plate, ensuring that the pulverized coal gas is fully mixed at the rear end of the primary air duct. Air is introduced into the secondary air duct inside the push rod and the outer secondary air duct, ensuring that the pulverized coal gas is fully combusted. A transmission is installed between the baffle and the mixing mechanism. The larger the opening of the baffle, the larger the rotation angle of the guide plate, to handle a larger flow rate of pulverized coal gas. Attached Figure Description

[0015] Figure 1 This is a three-dimensional cross-sectional structural diagram of a gas turbine swirl burner proposed in this utility model;

[0016] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention from another perspective;

[0018] Figure 4 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0019] Figure 5 This is a three-dimensional cross-sectional view of the primary air duct, inner secondary air duct, and outer secondary air duct of this utility model.

[0020] Figure 6 This is a three-dimensional exploded structural diagram of the guide tube and mixing mechanism of this utility model;

[0021] Figure 7 This is a three-dimensional structural schematic diagram of the guide plate of this utility model;

[0022] Figure 8 This is a three-dimensional structural diagram of the guide plate and connecting ring of this utility model.

[0023] Legend:

[0024] 1. Burner body; 2. Primary air duct; 3. Inner secondary air duct; 4. Outer secondary air duct; 5. Baffle; 6. Guide pipe; 7. Connecting ring; 8. Guide plate; 9. Rotating rod; 10. Rotating disk; 11. Drive sleeve; 12. Drive groove; 13. Connecting column; 14. Connecting block; 15. Push rod; 16. Limiting rod; 17. Air inlet. Detailed Implementation

[0025] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figure 1-8 A gas turbine swirl burner includes a burner body 1, a primary air duct 2 fixedly installed inside the burner body 1, an inner secondary air duct 3 and an outer secondary air duct 4 inside the burner body 1, a mixing mechanism inside the primary air duct 2, and a baffle 5 on the inner secondary air duct 3. When this device is put into use, in order to avoid uneven coal powder mixing due to centrifugal force at the bend inside the primary air duct 2, resulting in less coal powder at the bend than at the outer bend, a mixing mechanism is installed inside the primary air duct 2 to mix the coal powder flowing through the bend. The baffle 5 is used to control the air intake of the inner secondary air duct 3. This method ensures that the coal powder airflow inside the primary air duct 2 is mixed evenly, resulting in better combustion performance.

[0027] As a preferred technical solution of this embodiment, a guide pipe 6 is fixedly installed inside the primary air duct 2, and both ends of the guide pipe 6 are set as conical flared openings; the flared openings at the ends facilitate the introduction of all pulverized coal gas into the guide pipe 6, so that all pulverized coal gas flows through the mixing mechanism, and the thin tube in the middle section of the guide pipe 6 can cause the pulverized coal gas to gather, which facilitates the full mixing of the pulverized coal gas.

[0028] As a preferred embodiment, the mixing mechanism includes a connecting ring 7, which is fixedly installed inside the guide pipe 6. Multiple guide plates 8 are rotatably mounted on the connecting ring 7, and rotating rods 9 are fixedly connected to the multiple guide plates 8. The rotating rods 9 are rotatably connected to the guide pipe 6 and the primary air duct 2. A rotating disk 10 is fixedly connected to the top of the rotating rod 9, penetrating the guide pipe 6 and the primary air duct 2. After air enters the primary air duct 2, rotating the rotating disk 10 causes the rotating rod 9 to drive the guide plates 8 to rotate. The multiple guide plates 8 are tilted and combined to form a swirling structure. After the pulverized coal gas passes through the guide plates 8, a swirling flow is generated, allowing the pulverized coal gas to be fully mixed during its rotational advance.

[0029] As a preferred embodiment, a drive sleeve 11 is fixedly connected to one side of the baffle 5. A plurality of drive grooves 12 are fixedly installed on the inner wall of the drive sleeve 11. A plurality of connecting posts 13 are fixedly installed on the plurality of rotating disks 10. The plurality of connecting posts 13 are slidably installed inside the drive grooves 12. During the movement of the baffle 5, the drive sleeve 11 is moved, and the movement of the drive sleeve 11 causes the drive grooves 12 to move. The movement of the drive grooves 12 causes the connecting posts 13 to rotate under the combined action of the rotating disks 10 and the drive grooves 12, thereby causing the rotating disks 10 and the rotating rod 9 to rotate, and causing the guide plate 8 to rotate.

[0030] As a preferred technical solution in this embodiment, the drive sleeve 11 is configured as a regular polygon, and the inner wall of the drive sleeve 11 is arranged parallel to the rotating disk 10; this facilitates the transmission between the drive sleeve 11 and the rotating disk 10.

[0031] As a preferred technical solution of this embodiment, connecting blocks 14 are fixedly installed on both sides of the drive sleeve 11, and push rods 15 are fixedly installed on the side wall of the burner body 1. The output end of the push rod 15 passes through the side wall of the burner body 1 and is fixedly connected to one of the connecting blocks 14; the drive sleeve 11 and the baffle 5 are moved by the push rod 15.

[0032] As a preferred technical solution in this embodiment, a limiting rod 16 is fixedly installed inside the burner body 1, and the connecting block 14, which is away from the push rod 15, is slidably connected to the limiting rod 16; the sliding cooperation between the limiting rod 16 and the connecting block 14 assists the drive sleeve 11 to move.

[0033] As a preferred technical solution in this embodiment, an air inlet 17 is fixedly installed at the bottom of the burner body 1; air is introduced into the interior of the burner body 1 through the air inlet 17.

[0034] General working principle: The pulverized coal gas enters the burner body 1 through the primary air duct 2. A guide pipe 6 and a mixing mechanism are set after the bend of the primary air duct 2. The guide pipe 6 guides the unevenly mixed pulverized coal gas to the mixing mechanism. The mixing mechanism causes the pulverized coal gas to swirl through the guide plate 8, so that the pulverized coal gas is fully mixed at the rear end of the primary air duct 2. Air is introduced into the secondary air duct 3 inside the push rod 15 and the outer secondary air duct 4, so that the pulverized coal gas is fully combusted. A transmission is set between the baffle 5 and the mixing mechanism. The larger the opening of the baffle 5, the larger the rotation angle of the guide plate 8, so as to handle a larger flow of pulverized coal gas.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas turbine swirl burner, comprising a burner body (1), characterized in that, A primary air duct (2) is fixedly installed on the burner body (1). An inner secondary air duct (3) and an outer secondary air duct (4) are provided inside the burner body (1). A mixing mechanism is provided inside the primary air duct (2). A baffle (5) is provided on the inner secondary air duct (3).

2. A gas turbine swirl burner according to claim 1, characterized in that, The primary air duct (2) is fixedly installed with a guide pipe (6), and the two ends of the guide pipe (6) are set in a tapered flared shape.

3. A gas turbine swirl burner according to claim 2, characterized in that, The mixing mechanism includes a connecting ring (7), which is fixedly installed inside the guide pipe (6). Multiple guide plates (8) are rotatably installed on the connecting ring (7). Rotating rods (9) are fixedly connected to the multiple guide plates (8). The rotating rods (9) are rotatably connected to the guide pipe (6) and the primary air duct (2). A rotating disk (10) is fixedly connected to the top of the rotating rod (9) through the guide pipe (6) and the primary air duct (2).

4. A gas turbine swirl burner according to claim 3, characterized in that, A drive sleeve (11) is fixedly connected to one side of the baffle (5). Multiple drive grooves (12) are fixedly installed on the inner wall of the drive sleeve (11). Connecting columns (13) are fixedly installed on multiple rotating disks (10). The multiple connecting columns (13) are slidably installed inside the drive grooves (12).

5. A gas turbine swirl burner according to claim 4, characterized in that, The drive sleeve (11) is configured as a regular polygon, and the inner wall of the drive sleeve (11) is in vertical contact with the top of the rotating disk (10).

6. A gas turbine swirl burner according to claim 5, characterized in that, Connecting blocks (14) are fixedly installed on both sides of the drive sleeve (11), and a push rod (15) is fixedly installed on the side wall of the burner body (1). The output end of the push rod (15) passes through the side wall of the burner body (1) and is fixedly connected to one of the connecting blocks (14).

7. A gas turbine swirl burner according to claim 6, characterized in that, A limiting rod (16) is fixedly installed inside the burner body (1), and the connecting block (14) away from the push rod (15) is slidably connected to the limiting rod (16).

8. A gas turbine swirl burner according to claim 3, characterized in that, An air inlet (17) is fixedly installed at the bottom of the burner body (1).

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