Multi-fork steam injection premixing type smokeless burner

Abstract

The utility model provides a multi-fork steam injection premixing type smokeless burner, which relates to the technical field of petrochemical tail gas treatment and comprises a gas inlet pipe, a gas mixing pipe, a distribution pipe and a steam pipe. According to the multi-fork steam injection premixing type smokeless burner, air enters the gas mixing pipe, steam enters the steam injection cover through the branch pipes from the steam pipe, the steam injection cover injects surrounding air to the distribution pipe through the air inlet holes by means of the steam flowing at a high speed, and the multiple exhaust holes are formed in the distribution pipe; through the arrangement of the distribution pipe and the gas mixing pipe, injected air can be evenly sprayed out in all directions of the distribution pipe and is fully mixed with discharged air in the gas mixing pipe, meanwhile, small-aperture exhaust holes are formed in the distribution pipe, the turbulence degree of injected gas is improved, combustion flames are more stable, the discharged air and the air can be continuously mixed and updated through turbulence, and the combustion efficiency is improved. And continuous power is provided for complete combustion of hydrocarbon substances, the combustion efficiency is improved, the steam consumption is reduced, and the formation of black smoke is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical tail gas treatment technology, and in particular to a multi-forked steam ejector premixed smokeless burner. Background Technology

[0002] A steam smoke suppressor is a device used in flare systems to treat waste gases generated during production processes in industries such as petrochemicals. Its working principle involves injecting steam into the flare gas to optimize combustion conditions, promote complete combustion, and reduce black smoke emissions.

[0003] Currently, the vent gas produced in many petrochemical production processes has a complex composition, containing a large amount of smog-generating substances such as pentane, hexane, ethylene, and acetylene. When these substances are not fully combusted, they produce a large amount of carbon black, which manifests as black smoke. Current steam smoke elimination burners generally have low smoke elimination efficiency and excessive steam consumption, resulting in serious waste of resources, and urgently need to be upgraded and transformed. Utility Model Content

[0004] This invention provides a multi-forked steam ejector premixed smokeless burner, which solves the problems of low smoke elimination efficiency and excessive steam consumption mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-forked steam ejector premixed smokeless burner, comprising an inlet pipe, a mixing pipe, a distribution pipe, and a steam pipe. The upper end of the inlet pipe is fixedly connected to the mixing pipe, and multiple outlet pipes are fixedly connected to the upper surface of the mixing pipe. A distribution pipe is provided inside the inlet pipe, and multiple sets of exhaust holes are opened on the peripheral side of the distribution pipe. A steam pipe is provided on one side of the inlet pipe, and a collecting pipe is fixedly connected to the upper end of the steam pipe. Multiple branch pipes are fixedly connected to the upper surface of the collecting pipe, and a steam ejector hood is fixedly connected to the upper end of the branch pipe. A bent pipe is fixedly connected to the upper end of the steam ejector hood, and the upper end of the bent pipe extends into the mixing pipe and is fixed to the distribution pipe.

[0006] Preferably, the mixing pipe is placed horizontally, and the outlet pipe is fixed on the outer peripheral side of the mixing pipe.

[0007] Preferably, multiple baffles are evenly distributed and fixed at the upper opening of the air outlet pipe.

[0008] Preferably, both ends of the mixing pipe and the distribution pipe are closed, and the outer diameter of the distribution pipe is smaller than the inner diameter of the mixing pipe.

[0009] Preferably, the plurality of outlet pipes are arranged linearly along the length of the mixing pipe, and the plurality of branch pipes are arranged linearly along the length of the collecting pipe.

[0010] Preferably, the interior of the steam ejector is hollow, and an air inlet is provided on the lower end face of the steam ejector.

[0011] Preferably, the upper end of the branch pipe extends inside the steam ejector shroud.

[0012] Preferably, each set of exhaust holes is spaced apart from the bend.

[0013] Preferably, the air inlet pipe, the air mixing pipe, and the air outlet pipe are connected together, and the steam pipe, the collecting pipe, the branch pipe, the steam ejector hood, and the distribution pipe are connected together.

[0014] Preferably, the lower end of the air inlet pipe is fixedly connected to flange one, and the lower end of the steam pipe is fixedly connected to flange two.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. When venting air is released, it enters through the inlet pipe, then the mixing pipe. After the venting air and air are fully mixed, it is discharged from the outlet pipe for combustion. The diameter of the outlet pipe is smaller than that of the mixing pipe, which helps to increase the flow velocity of the mixed gas. This increased flow velocity also creates an ejector effect, allowing the air around the outlet pipe to be fully incorporated into the combustion, thus improving combustion efficiency. Steam enters through the steam pipe, passes through various branch pipes, and enters the steam ejector hood. The steam ejector hood uses high-speed flowing steam to eject the surrounding air through the inlet holes to the distribution pipe. Several exhaust holes on the distribution pipe allow the ejected air to be evenly sprayed out in all directions and fully mixed with the venting air in the mixing pipe. At the same time, the small-diameter exhaust holes on the distribution pipe increase the turbulence of the ejected gas, making the combustion flame more stable. Turbulence allows the venting air to continuously mix and renew with the air, providing a continuous power source for the complete combustion of hydrocarbons, improving combustion efficiency, reducing steam consumption, and greatly reducing the formation of black smoke.

[0017] 2. Several turbulence deflectors are welded at the outlet of the gas pipe. These deflectors disrupt the gas flow at the outlet, creating strong turbulence between the gas mixture and the external air. This facilitates secondary mixing of the gas mixture with the external air, significantly improving the combustion efficiency of hydrocarbons, reducing black smoke production, and achieving smokeless combustion. Simultaneously, the steam travels with the gas mixture to the combustion zone. During combustion, carbon particles react with the steam in a water-gas reaction to produce carbon monoxide and hydrogen, which continue to burn. The steam also has a high heat capacity, which lowers the flame temperature, inhibits pyrolysis, and reduces carbon particle formation, effectively minimizing black smoke generation during combustion. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of the multi-forked steam ejector premixed smokeless burner of this utility model;

[0019] Figure 2 This is a front view of the multi-forked steam ejector premixed smokeless burner of this utility model;

[0020] Figure 3 This is a cross-sectional view of the mixing pipe and the distribution pipe of this utility model in combination;

[0021] Figure 4 This is a side view of the multi-forked steam ejector premixed smokeless burner of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the branch pipe and the steam ejector hood of this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the bend and the distribution pipe of this utility model.

[0024] The following are the labels in the diagram: 1. Inlet pipe; 11. Flange 1; 2. Mixing pipe; 21. Outlet pipe; 211. Baffle plate; 3. Distribution pipe; 31. Exhaust port; 4. Steam pipe; 41. Flange 2; 5. Manifold; 6. Branch pipe; 7. Steam ejector hood; 71. Inlet port; 8. Bend. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] This utility model provides a multi-forked steam ejector premixed smokeless burner, such as... Figure 1 and Figure 2 As shown, the system includes an intake pipe 1, a mixing pipe 2, a distribution pipe 3, and a steam pipe 4. The upper end of the intake pipe 1 is fixedly connected to the mixing pipe 2, which is placed horizontally. Multiple outlet pipes 21 are fixedly connected to the upper surface of the mixing pipe 2, arranged linearly along its length. The outlet pipes 21 are fixed to the outer circumferential side of the mixing pipe 2. The diameter of the outlet pipes 21 is smaller than that of the mixing pipe 2, which helps to increase the flow velocity of the mixed gas. This increased flow velocity also generates an ejector effect, allowing the air around the outlet pipes 21 to be fully incorporated into the combustion, thus improving combustion efficiency. Multiple baffles 211 are evenly distributed and fixed at the circumference of the upper opening of the outlet pipes 21. The baffles 211 can disrupt the flow state of the gas at the outlet of the branch pipe 6, causing strong turbulence between the mixed gas and the external air, which helps to achieve secondary mixing between the external air and the mixed gas.

[0027] like Figure 1 and Figure 2 As shown, a distribution pipe 3 is installed inside the intake pipe 1. Both ends of the mixing pipe 2 and the distribution pipe 3 are closed. The outer diameter of the distribution pipe 3 is smaller than the inner diameter of the mixing pipe 2. Multiple sets of exhaust holes 31 are opened on the peripheral side of the distribution pipe 3. A steam pipe 4 is installed on one side of the intake pipe 1. A collecting pipe 5 is fixedly connected to the upper end of the steam pipe 4. Multiple branch pipes 6 are fixedly connected to the upper surface of the collecting pipe 5. The multiple branch pipes 6 are arranged linearly along the length of the collecting pipe 5. A steam ejector 7 is fixedly connected to the upper end of the branch pipe 6. The steam ejector 7 is hollow inside. The steam ejector 7 adopts a cross-section shrinkage type. The upper end of the steam ejector 7 is smaller than the lower end. An intake hole 71 is opened on the lower end surface of the steam ejector 7. The upper end of the branch pipe 6 extends into the steam ejector 7. A bend 8 is fixedly connected to the upper end of the steam ejector 7. The upper end of the bend 8 extends into the mixing pipe 2 and is fixed on the distribution pipe 3. Each set of exhaust holes 31 and bend 8 are arranged at intervals. Steam enters the steam ejector 7 from the branch pipe 6. The high-speed steam flow draws surrounding air through the air inlet 71 into the steam ejector 7, where it mixes with the steam. The steam then passes through the bend 8 into the distribution pipe 3. Several exhaust holes 31 are provided on the distribution pipe 3, allowing the ejected air to be evenly sprayed out in all directions and fully mixed with the vented air in the mixing pipe 2. At the same time, the small-diameter exhaust holes 31 on the distribution pipe 3 increase the turbulence of the ejected gas, making the combustion flame more stable. Turbulence allows the vented air to continuously mix and renew with the air, providing a continuous source of power for the complete combustion of hydrocarbons, improving combustion efficiency, reducing steam consumption, and greatly reducing the formation of black smoke.

[0028] like Figure 1 and Figure 2 As shown, the air inlet pipe 1, the mixing pipe 2 and the air outlet pipe 21 are connected, and the steam pipe 4, the collecting pipe 5, the branch pipe 6, the steam ejector 7 and the distribution pipe 3 are connected.

[0029] like Figure 1 and Figure 2 As shown, the lower end of the air inlet pipe 1 is fixedly connected to flange 11, and the air inlet pipe 1 is connected to the flare gas pipeline through flange 11. The lower end of the steam pipe 4 is fixedly connected to flange 41, and the steam pipe 4 is connected to the external steam supply pipeline through flange 41.

[0030] Using this utility model, such as Figure 1 and Figure 2As shown, when the vented air is released, it enters through the intake pipe 1 and then enters the mixing pipe 2. After the vented air and air are fully mixed, it is discharged from the exhaust pipe 21 for combustion. The diameter of the exhaust pipe 21 is smaller than that of the mixing pipe 2, which helps to increase the flow rate of the mixture. While increasing the flow rate, it can also generate an ejector effect, so that the air around the exhaust pipe 21 can be fully added to the combustion, thereby improving the combustion efficiency. Steam enters from steam pipe 4, passes through various branch pipes 6, and enters steam ejector 7. When the steam flowing out at high speed from the branch pipes 6 enters the steam ejector 7, it will draw the surrounding air through the air inlet 71 to the distribution pipe 3. Several exhaust holes 31 on the distribution pipe 3 allow the injected air and steam to be sprayed evenly in all directions of the distribution pipe 3 and fully mixed with the vented air in the mixing pipe 2. At the same time, the small-diameter exhaust holes 31 on the distribution pipe 3 increase the turbulence of the ejected gas, making the combustion flame more stable. Turbulence allows the vented air to be continuously mixed and renewed with the air, providing a continuous source of power for the complete combustion of hydrocarbons, improving combustion efficiency, reducing steam consumption, and greatly reducing the formation of black smoke. Several flow deflectors 211 are welded at the outlet of the gas outlet pipe 21. These deflectors disrupt the gas flow at the outlet of the branch pipe 6, creating strong turbulence between the gas mixture and the external air. This facilitates secondary mixing of the gas mixture with the external air, significantly improving the combustion efficiency of hydrocarbons, reducing black smoke production, and achieving smokeless combustion. Simultaneously, steam travels with the gas mixture to the combustion zone. During combustion, carbon particles react with the steam in a water-gas reaction to produce carbon monoxide and hydrogen, which continue to burn. The steam also has a high heat capacity, which lowers the flame temperature, inhibits pyrolysis, and reduces carbon particle formation, effectively minimizing black smoke generation during combustion.

[0031] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multi-branch vapor-ejected premixed smokeless combustor, characterized by, The utility model provides an air -gas mixing device, including air inlet pipe (1), air -gas mixing pipe (2), distribution pipe (3) and steam pipe (4), the upper end fixed connection air -gas mixing pipe (2) of air inlet pipe (1), the upper surface fixed connection of air -gas mixing pipe (2) has a plurality of air outlet pipe (21), the inside distribution pipe (3) of air inlet pipe (1) is set up, and a plurality of groups of exhaust hole (31) are seted up on the lateral surface of distribution pipe (3), and the one side of air inlet pipe (1) is provided with steam pipe (4), the upper end fixed connection of steam pipe (4) has collection pipe (5), the upper surface fixed connection of collection pipe (5) has a plurality of branch pipe (6), the upper end fixed connection of branch pipe (6) has steam induction hood (7), the upper end fixed connection of steam induction hood (7) has elbow pipe (8), and the elbow pipe (8) upper end goes into air -gas mixing pipe (2) and is fixed on distribution pipe (3).

2. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 1, characterized by, Air -gas mixing pipe (2) is horizontally placed, and air outlet pipe (21) is fixed on the outer circumferential surface of air -gas mixing pipe (2).

3. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 2, characterized by, The upper end opening of air outlet pipe (21) is uniformly distributed with a plurality of spoiler (211).

4. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 1, characterized by The both ends of air -gas mixing pipe (2) and distribution pipe (3) are closed, and the outer diameter size of distribution pipe (3) is less than the inner diameter size of air -gas mixing pipe (2).

5. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 2, wherein A plurality of air outlet pipes (21) are linearly arranged along the length direction of air -gas mixing pipe (2), and a plurality of branch pipes (6) are linearly arranged along the length direction of collection pipe (5).

6. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 1, wherein The inside of steam induction hood (7) is hollow, and the lower end surface of steam induction hood (7) is provided with air inlet hole (71).

7. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 6, characterized by The upper end of branch pipe (6) is inside steam induction hood (7).

8. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 1, characterized by, Each group of exhaust hole (31) is arranged at intervals with elbow pipe (8).

9. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 1, characterized by, Air inlet pipe (1), air -gas mixing pipe (2) and air outlet pipe (21) are communicated, and steam pipe (4), collection pipe (5), branch pipe (6), steam induction hood (7) and distribution pipe (3) are communicated.

10. The multi-furcated steam-ejected premixing type smokeless combustor according to claim 1, characterized by The lower end of air inlet pipe (1) is fixedly connected with flange one (11), and the lower end of steam pipe (4) is fixedly connected with flange two (41).

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