Premixing type torch burner

Abstract

The utility model provides a premixing type torch burner which comprises a protection loop containing inert gas and a premixing mechanism, the premixing mechanism comprises a mixing chamber arranged below the protection loop, and the mixing chamber is of a three-way structure. And the protection loop comprises a first pipeline used for receiving flare gas, a second pipeline used for receiving air and a third pipeline used for injecting premixed combustible gas into the protection loop through the flow equalizing chamber. The torch burner has the advantages of being simple in structural design, reliable in performance, safe, efficient and the like, and therefore the problem that an existing torch burner is complex in structure can be solved more easily.

Description

Technical Field

[0001] The utility model relates to the safety field of petrochemical industry, in particular to a premixed flare burner. Background Art

[0002] In order to prevent accidents such as overpressure rupture in tank areas and pipelines under abnormal operating conditions such as process runaway and fire, flare devices are usually installed to release and burn combustible gases in the event of an accident.

[0003] At present, most of the flare burners in service adopt the diffusion combustion form, which has a relatively simple structure. The flare gas is ejected from the burner nozzle and mixed with the air while burning, so it is easy to form a large flame height to ensure sufficient air entrainment and sufficient combustion of the flare gas, thus causing more serious light pollution, heat radiation or accidents where the flame escapes from the cylinder (ground flare). The use of premixed burners can alleviate the above situation, but there are still some deficiencies in the current research on this type of burner.

[0004] CN213334432U discloses a premixing ground torch burner, including a gas inlet pipe, a gas hood installed on the upper part of the gas inlet pipe, and the gas hood is a truncated cone-shaped shell with openings on the upper and lower bottoms. The utility model combines a truncated cone-shaped shell air inlet hood and a truncated cone-shaped shell gas hood, and the air inlet hood and the gas hood are plugged and matched, so that the air inlet formed between the air inlet hood and the gas hood faces downward, which can have a certain resistance to horizontal airflow to avoid excessive airflow from rushing into the interior of the mixing tube. However, the premixing process of the device relies on air injection, and is highly dependent on the surrounding air environment (oxygen concentration, airflow, etc.), which is easy to cause problems such as incomplete combustion and poor flame rigidity.

[0005] CN111288444A discloses a torch multi-stage premix burner, comprising: a bottom cylinder, the side wall of the bottom cylinder is provided with a plurality of air inlet holes evenly distributed along its circumference; an upper cylinder, the upper cylinder cover is arranged at the top of the bottom cylinder and connected to the bottom cylinder; a low-pressure gas system for exhaust gas discharge, the low-pressure gas system for exhaust gas discharge is arranged at the bottom of the bottom cylinder, and is used to provide low-pressure gas to the bottom cylinder; a high-pressure gas system for exhaust gas discharge, the high-pressure gas system for exhaust gas discharge is arranged at the bottom of the bottom cylinder, and is used to provide high-pressure gas to the bottom cylinder; a bottom steam system, the bottom steam system is arranged at the bottom of the bottom cylinder, and is used to provide steam to the bottom cylinder; an upper steam system, the upper steam system is arranged at the bottom of the upper cylinder, and is used to provide steam to the upper cylinder. However, the structure of the device is relatively complex, and additional steam needs to be provided, and the application scenarios are limited.

[0006] In view of this, in order to effectively reduce the flame height, improve the flame rigidity, and increase the flare gas combustion efficiency, it is desired in the art to provide a premixed flare burner to solve the above technical problems. Utility Model Content

[0007] The purpose of the utility model is to provide a premixed flare burner, which can guide combustion through gas premixing and porous media (sintered parts and combustion surface), so as to form a high-rigidity plane premixed flame on the combustion surface. At the same time, the plane premixed flame can be well protected under the action of the inert gas sprayed by the protection loop, thereby effectively solving the problems of large flame height and poor flame rigidity of the existing flare burner.

[0008] According to the utility model, a premixed flare burner is provided, comprising a protection loop containing an inert gas, and

[0009] A premixing mechanism, wherein the premixing mechanism includes a mixing chamber arranged below the protection loop, the mixing chamber is configured as a three-way structure, and includes a first pipeline for receiving flare gas, a second pipeline for receiving air, and a third pipeline for injecting premixed combustible gas into the protection loop through a flow equalizing chamber.

[0010] In one embodiment, the premixing mechanism includes a flow equalizing chamber disposed between the blending chamber and the protection loop.

[0011] In one embodiment, a through hole communicating with the third pipeline is formed at the center of the flow equalizing chamber.

[0012] In one embodiment, the protection loop is configured in the form of a hollow sleeve, and the premixing flare burner further comprises a sintered member concentrically arranged in the protection loop.

[0013] In one embodiment, a combustion surface is provided on the upper end surface of the sintered component, and both the sintered component and the combustion surface are made of sintered metal material.

[0014] In one embodiment, the sintered member and the combustion surface are both constructed as porous structures to allow the premixed combustible gas to be discharged uniformly.

[0015] In one embodiment, a flow balancing plate is provided in the flow balancing chamber to allow the premixed combustible gas to flow evenly toward the sintered component.

[0016] In one embodiment, an inclined igniter is provided at the top of the protection loop, and an ignition port of the igniter is located above the combustion surface.

[0017] In one embodiment, the igniter is configured as any one of a pilot lamp, a spark igniter and an arc igniter.

[0018] In one embodiment, a plurality of exhaust ports arranged around the combustion surface for outputting the inert gas are provided at the upper end surface of the protection loop; and an air inlet for injecting the inert gas is provided at the lower end surface of the protection loop.

[0019] Compared with the prior art, the advantages of the utility model are:

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] First, the utility model guides combustion through gas premixing and porous media (sintered parts and combustion surface), so that a high-rigidity plane premixed flame can be formed on the combustion surface. At the same time, the plane premixed flame can be well protected under the action of the inert gas sprayed by the protection loop, thereby effectively solving the problems of large flame height and poor flame rigidity of existing torch burners.

[0022] Secondly, the utility model has the advantages of simple structural design, reliable performance, safety and high efficiency, and can more easily solve the problem of complex structure of existing flare burners. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0024] Figure 1 The internal structure of the premixing flare burner according to the utility model is schematically shown;

[0025] Figure 2 It is a top view of the premixing flare burner according to the utility model.

[0026] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0027] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0028] The utility model will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 The internal structure of the premixing flare burner 100 according to the present invention is schematically shown;

[0030] Figure 2FIG. 1 is a top view of a premixing flare burner 100 according to the present invention.

[0031] like Figure 1 As shown, the premixing flare burner 100 according to the present invention comprises a protection loop 11 containing inert gas and a premixing mechanism, wherein the premixing mechanism comprises a mixing chamber 21 arranged below the protection loop 11 and a flow equalizing chamber 22 arranged between the mixing chamber 21 and the protection loop 11.

[0032] In one embodiment, Figure 1 As shown, the mixing chamber 21 is constructed as a three-way structure and includes a first pipeline 211 and a second pipeline 212. The first pipeline 211 can be used to receive the flare gas 201 from the outside, and the second pipeline 212 can receive the air 202 from the outside. Preferably, the flare gas 201 entering through the first pipeline 211 and the air 202 entering through the second pipeline 212 can be fully mixed in the mixing chamber 21 to form a premixed combustible gas.

[0033] Preferably, a dynamic adjustment mechanism (not shown in the drawings) can be provided at the second pipeline 212, so that the flow rate of the air 202 can be automatically adjusted according to the flow rate of the flare gas 201 to ensure that the premixed combustible gas formed in the mixing chamber 21 can reach the required concentration for use.

[0034] In one embodiment, Figure 1 As shown, the mixing chamber 21 further includes a third pipeline 213 coaxially arranged with the first pipeline 211. Preferably, the third pipeline 213 is communicated with the flow equalizing chamber 22, so that the fully mixed premixed combustible gas can be injected into the flow equalizing chamber 22.

[0035] In one embodiment of the present invention, Figure 1 As shown, a through hole 221 is formed at the center of the flow balancing chamber 22. Preferably, the flow balancing chamber 22 is connected to the third pipeline 213 through the through hole 221, so that the fully mixed premixed combustible gas can be more easily received.

[0036] Preferably, the lower end surface of the flow equalizing chamber 22 is configured as a curved surface structure.

[0037] In one embodiment, a flow equalizer plate (not shown in the drawings) is provided in the flow equalizer chamber 22. In the present invention, the premixed gas can be dispersed and evenly discharged under the action of the flow equalizer plate to ensure that the premixed gas can evenly flow into the sintered part 12 (described below) to improve the stability of the torch combustion, which is described below.

[0038] In other embodiments, the flow equalizing plate may also be configured as other structures that can ensure that the premixed combustible gas can evenly enter the sintered component 12 .

[0039] In one embodiment of the present invention, Figure 1 and 2 As shown, the protection loop 11 is configured in the form of a hollow sleeve, and the premixing flare burner 100 further includes a sintered member 12 concentrically arranged in the protection loop 11. Preferably, the sintered member 12 is configured in a cylindrical shape and fixed on the inner wall of the protection loop 11, thereby improving the firmness and stability of the premixing flare burner 100.

[0040] Preferably, the protection loop 11 can be fixed to the outer side of the sintered component 12 by welding, riveting, etc., and the gap between the two can be minimized.

[0041] In one embodiment, Figure 1 and 2 As shown, a combustion surface 13 is provided on the upper end surface of the sintered part 12. In the present invention, the combustion surface is constructed as a circular surface, so that the effect of uniformly discharging the premixed combustible gas can be more easily achieved, so as to further improve the rigidity of the flame.

[0042] In one embodiment, the sintered member 12 and the combustion surface 13 are both made of sintered metal material. Preferably, the sintered member 12 and the combustion surface 13 are both constructed as porous structures to ensure that the premixed gas can achieve a uniform discharge effect, so as to further reduce the height of the flame formed by the premixed flare burner 100 and improve the flame rigidity.

[0043] Preferably, the sintered metal is, for example, sintered bronze.

[0044] In one embodiment, the premixing flare burner 100 further includes a cooling mechanism (not shown in the drawings) adapted to the sintered part 12 , thereby effectively preventing overheating and further improving the use safety of the premixing flare burner 100 .

[0045] According to the utility model, if Figure 1 and 2 As shown, an inclined igniter 14 is provided at the top of the protection loop 11. Preferably, the ignition port of the igniter 14 is located above the combustion surface 13. Therefore, the premixed combustible gas formed in the mixing chamber 21 can pass through the porous structure of the sintered part 12 and the combustion surface 13 in sequence, and thus be uniformly discharged upward to contact the igniter 14, thereby ensuring that the premixed flare burner 100 can smoothly generate flames.

[0046] In a preferred embodiment of the present invention, the igniter 14 is configured as any one of a pilot lamp, a spark igniter and an arc igniter.

[0047] In the present invention, the premixed flare burner 100 further comprises a flame monitoring system (not shown in the drawings) connected to the igniter 14. Preferably, the flame monitoring system is configured to monitor the burning condition of the flame and to achieve timely ignition through the igniter 14 in the event of an accidental flameout.

[0048] In one embodiment, Figure 1 As shown, an air inlet 111 for injecting inert gas is provided at the lower end surface of the protection loop 11, and a plurality of exhaust ports for outputting inert gas are provided at the upper end surface of the protection loop 11 and are arranged around the combustion surface 13 (not shown in the drawings).

[0049] In the present invention, the flow rate of the inert gas needs to be higher than the flow rate of the premixed combustible gas. Therefore, the flame formed by the premixed flare burner 100 will be well protected by the inert gas, so as to further improve the rigidity and stability of the flame.

[0050] In the present invention, each pipeline and chamber can be connected by welding or flange.

[0051] The working principle of the utility model is introduced below:

[0052] First, the flare gas 201 and the air 202 enter the mixing chamber 21 through the first pipeline 211 and the second pipeline 212 respectively, and are fully mixed in the mixing chamber 21 to form a premixed combustible gas;

[0053] Then, the premixed combustible gas will enter the flow equalizing chamber 22 through the third pipeline 213, and will be fully dispersed and uniformly discharged from the flow equalizing chamber 22 under the action of the flow equalizing plate, thereby entering the sintered part 12;

[0054] Afterwards, the premixed combustible gas further flows evenly in the sintered component 12 and is evenly sprayed out through the combustion surface 13 . The sprayed premixed combustible gas is ignited by the igniter 14 to form a planar premixed flame.

[0055] At the same time, the inert gas is discharged through the exhaust port of the protection loop 11 to form a comprehensive protection effect on the flame, so as to effectively reduce the flame height and improve the flame rigidity.

[0056] Preferably, the premixed flare burner 100 can also monitor the burning condition of the flame through a flame monitoring system, and can promptly ignite the flame through the igniter 14 in the event of an unexpected flameout.

[0057] The following describes an embodiment of the present invention:

[0058] In this embodiment, an elevated flare is used for illustration.

[0059] Preferably, the elevated flare is mostly discharged by a single burner, so the working principle of the premixed flare burner 100 described above can be directly applied to the elevated flare without modification.

[0060] The following describes the second embodiment of the present utility model.

[0061] In this embodiment, a closed ground flare is used for illustration.

[0062] Preferably, the closed ground flare is composed of multiple burners, and partition walls are set around the burners. In this embodiment, multiple burners can share the same mixing chamber 21 and flow equalization chamber 22 upstream to process the flare gas 201, and because the premixed flare burner 100 is a premixed combustion mode (internal oxygen supply), the partition wall does not need to be provided with an air inlet, which can further weaken the impact of environmental factors on flame combustion. In the case of setting a partition wall, the protective gas loop 11 may be omitted as appropriate, and flame transmission can be achieved by reasonably setting the burner spacing.

[0063] The following describes the third embodiment of the present utility model.

[0064] In this embodiment, an open ground flare is used for illustration.

[0065] Preferably, the open ground flare partition wall may be far away from the burner and have a poor wind shielding effect. Therefore, it may be considered to uniformly set a protective gas loop 11 outside the multi-burner structure to maintain combustion stability.

[0066] Embodiment 4 of the present utility model is described below

[0067] In this embodiment, a flare in which the flare gas 201 component contains liquid is used for illustration.

[0068] Preferably, the flare gas 201 discharged in this embodiment contains liquid components, so a liquid separator needs to be provided upstream of the first pipeline 211 to prevent the liquid components from entering the burner and causing a fire rain accident.

[0069] Compared with the prior art, the utility model has the following advantages:

[0070] First, the utility model guides combustion through gas premixing and porous media (sintered member 12 and combustion surface 13), thereby forming a high-rigidity planar premixed flame on the combustion surface 13. At the same time, the planar premixed flame can be well protected under the action of the inert gas ejected from the protection loop 11, thereby effectively solving the problems of large flame height and poor flame rigidity of the existing torch burner.

[0071] Secondly, the utility model has the advantages of simple structural design, reliable performance, safety and high efficiency, and can more easily solve the problem of complex structure of existing flare burners.

[0072] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0073] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0074] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0075] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A premixed flare burner, characterized in that: include: a guard loop (11) containing an inert gas, and A premixing mechanism, the premixing mechanism comprising a mixing chamber (21) arranged below the protection loop (11), the mixing chamber (21) being configured as a three-way structure, and comprising a first pipeline (211) for receiving flare gas (201), a second pipeline (212) for receiving air (202), and a third pipeline (213) for injecting premixed combustible gas into the protection loop (11) through a flow equalizing chamber (22).

2. The premixed flare burner according to claim 1, characterized in that: The flow equalizing chamber (22) is arranged between the mixing chamber (21) and the protection loop (11).

3. The premixed flare burner according to claim 2, characterized in that: A through hole (221) communicating with the third pipeline (213) is formed at the center of the flow equalizing chamber (22).

4. The premixed flare burner according to claim 3, characterized in that: The protection loop (11) is configured in the form of a hollow sleeve, and the premixing flare burner further comprises a sintered part (12) concentrically arranged in the protection loop (11).

5. The premixed flare burner according to claim 4, characterized in that: A combustion surface (13) is provided on the upper end surface of the sintered component (12), and both the sintered component (12) and the combustion surface (13) are made of sintered metal material.

6. The premixed flare burner according to claim 5, characterized in that: The sintered part (12) and the combustion surface (13) are both constructed as porous structures to allow the premixed combustible gas to be discharged uniformly.

7. The premixed flare burner according to claim 6, characterized in that: A flow balancing plate is provided in the flow balancing chamber (22) to allow the premixed combustible gas to flow evenly toward the sintered component (12).

8. The premixed flare burner according to claim 7, characterized in that: An igniter (14) arranged obliquely is provided at the top end of the protection loop (11), and an ignition port of the igniter (14) is located above the combustion surface (13).

9. The premixed flare burner according to claim 8, characterized in that: The igniter (14) is constructed as any one of a pilot lamp, an electric spark igniter and an electric arc igniter.

10. The premixing flare burner according to any one of claims 5 to 9, characterized in that: A plurality of exhaust ports for outputting the inert gas are provided at the upper end surface of the protection loop (11) and are arranged around the combustion surface (13); and an air inlet (111) for injecting the inert gas is provided at the lower end surface of the protection loop (11).

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