Preheating burner backfire protection device for gasification plant

Abstract

The utility model relates to tempering protection device technical field, especially a kind of preheating burner tempering protection device for gasification device, including preheating burner, first guide ring, second guide surface, connecting sleeve, sealing disc, drainage portion, slide bar and limit sleeve, preheating burner is equipped with 90 ° bending structure in its export end, first guide ring is fixedly installed in preheating burner inner wall, and its bottom surface is equipped with first guide surface.The utility model wherein preheating burner is equipped with 90 ° bending structure in its export end, changes the axial ejection direction of traditional straight-through structure, forces flame to flow along bending path, makes high-temperature gas away from operating area, when tempering occurs, flame blocked by fire-retardant net, reverse airflow pushes sealing disc, drives sealing disc to close first guide ring, forms physical block, reduces flame from preheating burner and avoids preheating burner open end directly towards patrol channel and operator work area to cause direct burn threat.

Description

Technical Field

[0001] This utility model relates to the technical field of flashback protection devices, and more specifically, to a flashback protection device for a preheating burner used in a gasification device. Background Technology

[0002] During the operation of the gasification unit, the preheating burner, as a key component, plays an important role in preheating the furnace.

[0003] The preheating burners commonly used in existing technologies are mostly straight-through structures, with their open ends directly facing the inspection passage and the operator's work area. In practical applications, when the furnace negative pressure fluctuates or the fuel gas pressure is abnormal, backfire is very likely to occur. When backfire occurs in traditional structures, the flame and high-temperature gas are directly ejected along the burner axis, posing a direct risk of burns to the personnel performing inspections and furnace drying operations. Utility Model Content

[0004] Based on the aforementioned technical problem that "in the traditional structure, when backfire occurs, flames and high-temperature gases are directly ejected along the burner axis, posing a direct threat of burns to personnel performing inspections and furnace drying operations," this utility model proposes a backfire protection device for preheating burners in gasification devices.

[0005] This utility model proposes a preheating burner backfire protection device for a gasification device, comprising a preheating burner, a first guide ring, a second guide surface, a connecting sleeve, a sealing disc, a flow guide, a slide rod, and a limiting sleeve;

[0006] The preheating burner has a 90° curved structure at its outlet end;

[0007] The first guide ring is fixedly installed on the inner wall of the preheating burner, and its bottom surface is provided with a first guide surface. The first guide surface has a tapered structure with decreasing diameter from the inner cavity of the preheating burner to the outer side of the port.

[0008] The second guide surface is opened on the inner wall of the first guide ring, and has an inverted cone shape from the outside of the preheating burner port to the inside;

[0009] The connecting sleeve is fixedly installed on the inner wall of the preheating burner and connected to the first guide surface, and its inner wall forms an arc-shaped gas groove;

[0010] The sealing disc is coaxially sleeved inside the connecting sleeve;

[0011] The drainage section is fixed to the outer peripheral wall of the sealing disc and includes an integrally formed first drainage sleeve and a second drainage sleeve, which are connected by a streamlined curved surface transition.

[0012] The slide rod is fixed to the outer curved surface of the first drainage sleeve and is slidably connected to the first guide ring;

[0013] The limiting sleeve is fixed to the outer wall of the slide rod to limit the displacement range of the sealing disc.

[0014] Preferably, it also includes a second guide ring, which is fixed to the top of the connecting sleeve and its bottom surface is tangent to the arc-shaped air groove.

[0015] Preferably, the second guide surface has multiple connecting holes, and the slide rod slides into the connecting holes.

[0016] Preferably, it also includes a connecting flange, which is fixed to the connecting end of the preheating burner, and the outer wall is provided with an annular array of flange holes.

[0017] Preferably, an embedding groove is provided at the connection seam between the connecting flange and the preheating burner, and a sealing gasket is fitted inside the groove.

[0018] Preferably, a connecting ring is fixed to the top of the second guide ring, and the connecting ring has a cylindrical structure.

[0019] Preferably, when the first drainage sleeve of the drainage part falls, its outer curved surface fits into the second guide surface, and when the first drainage sleeve of the drainage part moves upward, its outer curved surface forms a guide groove with the air groove of the connecting sleeve.

[0020] Preferably, it also includes a fire-resistant mesh, which is disposed on the axial movement path of the sealing disc.

[0021] The beneficial effects of this utility model, achieved through the above technical solution, are as follows:

[0022] 1. The preheating burner has a 90° curved structure at its outlet end, which changes the axial spray direction of the traditional straight-through structure. This forces the flame to flow along the curved path, keeping the high-temperature gas away from the operating area. When backfire occurs, the sealing disc is pushed into the gas groove of the connecting sleeve by the airflow pressure, ensuring that the combustion passage is unobstructed. The flame blocked by the flame arrestor is pushed by the reverse airflow, which drives the sealing disc to close the first guide ring, forming a physical blockage. This reduces the flame from being ejected from the preheating burner and avoids the open end of the preheating burner directly facing the inspection channel and the operator's work area, thus preventing direct burns.

[0023] 2. During tempering, the flame is guided to diffuse into the burner, and the second guide surface and the first guide surface form an "airflow interlayer" to suppress flame overflow.

[0024] 3. The main body of the protective device consists of a preheating burner and its 90° curved section. The outlet end is connected to the gasifier through a connecting flange. An annular embedding groove is set at the flange connection, and an internal sealing gasket is installed to ensure the airtightness of the structural connection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the installation structure of the connecting flange of this utility model;

[0028] Figure 4 This is a schematic diagram of the installation structure of the sealing disc of this utility model;

[0029] Figure 5 This is a schematic diagram of the installation structure of the connecting sleeve of this utility model;

[0030] Figure 6 This is a schematic diagram of the installation structure of the drainage part of this utility model.

[0031] In the diagram: 1. Preheating burner; 2. First guide ring; 3. First guide surface; 4. Second guide surface; 5. Connecting hole; 6. Connecting sleeve; 7. Guide groove; 8. Second guide ring; 9. Connecting ring; 10. Sealing disc; 11. Drainage section; 12. First drainage sleeve; 13. Second drainage sleeve; 14. Slide rod; 15. Limiting sleeve; 16. Connecting flange; 17. Embedding groove; 18. Flame hole; 19. Sealing gasket; 20. Flame arrestor mesh. Detailed Implementation

[0032] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the term "fixed connection" should be interpreted broadly. For example, "fixed connection" can mean fixed installation, detachable connection, or integral connection; it can mean mechanical connection or electrical connection; it can mean direct connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] like Figures 1-6 As shown, a preheating burner backfire protection device for a gasification device includes a preheating burner 1, a first guide ring 2, a second guide surface 4, a connecting sleeve 6, a sealing disc 10, a flow guide 11, a slide rod 14, and a limiting sleeve 15.

[0035] The preheating burner 1 has a 90° curved structure at its outlet end; this changes the axial spray direction of the traditional straight-through structure, forcing the flame to flow along the curved path, so that the high-temperature gas is kept away from the operating area.

[0036] The first guide ring 2 is fixedly installed on the inner wall of the preheating burner 1. Its bottom surface is provided with a first guide surface 3. The first guide surface 3 has a tapered structure with decreasing diameter from the inner cavity of the preheating burner 1 to the outer side of the port.

[0037] The second guide surface 4 is located on the inner wall of the first guide ring 2 and has an inverted cone shape from the outside of the preheating burner 1 port inward. During tempering, it guides the flame to diffuse into the burner and forms an "airflow interlayer" with the first guide surface 3 to suppress flame overflow.

[0038] The connecting sleeve 6 is fixedly installed on the inner wall of the preheating burner 1 and connected to the first guide surface 3, and its inner wall forms an arc-shaped gas groove.

[0039] The sealing disc 10 is coaxially sleeved inside the connecting sleeve 6;

[0040] The drainage section 11 is fixed to the outer peripheral wall of the sealing disc 10, and includes an integrally formed first drainage sleeve 12 and a second drainage sleeve 13, which are connected by a streamlined curved surface transition.

[0041] The slide rod 14 is fixed to the outer curved surface of the first drainage sleeve 12 and is slidably connected to the first guide ring 2;

[0042] The limiting sleeve 15 is fixed to the outer wall of the slide rod 14 to limit the displacement range of the sealing disc 10.

[0043] When backfire occurs, the sealing disc 10 is pushed into the gas groove of the connecting sleeve 6 by the airflow pressure to ensure that the combustion passage is unobstructed. The flame blocked by the flame arrestor net 20 is pushed by the reverse airflow to the sealing disc 10, which causes the sealing disc 10 to close the first guide ring 2, forming a physical blockage.

[0044] like Figure 5 As shown, it also includes a second guide ring 8, which is fixed to the top of the connecting sleeve 6, and its bottom surface is tangent to the arc-shaped air groove.

[0045] like Figure 4 and Figure 5 As shown, multiple connecting holes 5 are provided on the second guide surface 4, and the slide rod 14 slides in conjunction with the connecting holes 5.

[0046] The preheating burner backfire protection device for the gasification unit also includes a connecting flange 16, which is fixed to the connecting end of the preheating burner 1. The outer wall is provided with an annular array of flange holes 18. An embedding groove 17 is opened at the connection seam between the connecting flange 16 and the preheating burner 1, and a sealing gasket 19 is fitted inside the groove.

[0047] The main body of the protective device consists of a preheating burner 1 and its 90° curved section. The outlet end is connected to the gasifier through a connecting flange 16. An annular embedded groove 17 is provided at the flange connection, and an internal sealing gasket 19 is provided to ensure the airtightness of the structural connection.

[0048] like Figure 4 As shown, a connecting ring 9 is fixed to the top of the second guide ring 8, and the connecting ring 9 has a straight cylindrical structure.

[0049] When the first drainage sleeve 12 of the drainage section 11 falls, its outer curved surface fits into the second guide surface 4. When the first drainage sleeve 12 of the drainage section 11 moves upward, its outer curved surface forms a guide groove 7 with the air groove of the connecting sleeve 6.

[0050] like Figure 2 As shown, it also includes a flame arrestor mesh 20, which is disposed on the axial movement path of the sealing disc 10; the mesh structure consumes the kinetic energy of the flame.

[0051] Working principle: When the preheating burner 1 generates a flame through backfire, under the impact of the flame, the sealing disc 10 drives the slide rod 14 to slide upward along the connecting sleeve 6 until the limiting sleeve 15 restricts the slide rod 14. At this time, the flow guide 11 is located in the gas groove of the connecting sleeve 6, forming a guide groove 7. The flame flows along the guide groove 7 into the connecting ring 9 and is sprayed onto the flame arrestor mesh 20 through the connecting ring 9. At this time, blocked by the flame arrestor mesh 20, the flame reverses and impacts the sealing disc 10. The sealing disc 10 seals with the second guide surface 4 on the first guide ring 2.

[0052] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A preheating burner flashback protection device for a gasification unit, comprising, characterized in that: The preheating burner (1) has a 90° curved structure at its outlet end; The first guide ring (2) is fixedly installed on the inner wall of the preheating burner (1), and its bottom surface is provided with a first guide surface (3). The first guide surface (3) has a tapered structure with decreasing diameter from the inner cavity of the preheating burner (1) to the outer side of the port. The second guide surface (4) is opened on the inner wall of the first guide ring (2) and has an inverted cone shape from the outside of the preheating burner (1) port to the inside. The connecting sleeve (6) is fixedly installed on the inner wall of the preheating burner (1) and connected to the first guide surface (3), and its inner wall forms an arc-shaped gas groove; The sealing disc (10) is coaxially sleeved inside the connecting sleeve (6); The drainage section (11) is fixed to the outer peripheral wall of the sealing disc (10) and includes an integrally formed first drainage sleeve (12) and a second drainage sleeve (13), which are connected by a streamlined curved surface transition. The slide rod (14) is fixed to the outer curved surface of the first drainage sleeve (12) and is slidably connected to the first guide ring (2); The limiting sleeve (15) is fixed to the outer wall of the slide bar (14) to limit the displacement range of the sealing disc (10).

2. The preheat burner flare shield for gasification apparatus of claim 1, wherein: It also includes a second guide ring (8), which is fixed to the top of the connecting sleeve (6), and its bottom surface is tangent to the arc-shaped air groove.

3. The preheating burner flashback protection device for gasification apparatus according to claim 2, characterized in that: Multiple connecting holes (5) are provided on the second guide surface (4), and the slide rod (14) slides in conjunction with the connecting holes (5).

4. The preheat burner flare shield for gasification apparatus of claim 3, wherein: It also includes a connecting flange (16), which is fixed to the connecting end of the preheating burner (1) and has an annular array of flange holes (18) on its outer wall.

5. The preheat burner flare shield for gasification apparatus of claim 4 wherein: A groove (17) is provided at the connection seam between the connecting flange (16) and the preheating burner (1), and a sealing gasket (19) is installed in the groove.

6. The preheat burner flare shield for gasification apparatus of claim 5 wherein: The second guide ring (8) has a connecting ring (9) fixed at the top, and the connecting ring (9) has a straight cylindrical structure.

7. The preheating burner flashback protection device for a gasification apparatus according to claim 6, characterized in that: When the first drainage sleeve (12) of the drainage part (11) falls, its outer curved surface fits against the second guide surface (4). When the first drainage sleeve (12) of the drainage part (11) moves upward, its outer curved surface forms a guide groove (7) with the air groove of the connecting sleeve (6).

8. The preheating burner flashback protection device for a gasification apparatus according to claim 7, characterized in that: It also includes a fire-resistant mesh (20), which is set on the axial movement path of the sealing disc (10).

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