CN219809904U - Multi-cavity combustor - Google Patents

Abstract

The utility model discloses a multi-chamber burner, comprising: a burner body having an annular chamber with an upward opening; the annular fire cover is arranged on the burner body and can shield the opening of the annular chamber, and a mixing cavity, an inner ring fire hole and an outer ring fire hole which are communicated with the mixing cavity are defined between the annular fire cover and the annular chamber; the partition piece is used for partitioning the gas mixing cavity into a first gas transmission cavity and a second gas transmission cavity which are communicated with each other, the first gas transmission cavity is directly communicated with the inner ring fire hole, and the second gas transmission cavity is directly communicated with the outer ring fire hole; the gas transmission pipe is arranged on the burner body, the output end of the gas transmission pipe is obliquely upwards communicated with the bottom of the first gas transmission cavity, and the gas output by the gas transmission pipe can do circular motion around the first gas transmission cavity, so that the gas can be combusted fully; the time point of the gas output from the outer ring fire hole in the second gas transmission cavity is delayed from the time point of the gas output from the inner ring fire hole in the first gas transmission cavity, so that the gas can be fully utilized, and deflagration can be prevented during ignition.

Description

Multi-cavity combustor

Technical Field

The utility model relates to the technical field of combustors, in particular to a multi-cavity combustor.

Background

The general combustor is provided with an inner ring fire hole and an outer ring fire hole, fuel gas output from the inner ring fire hole is ignited by an igniter, and flame at the inner ring fire hole moves to the position of the outer ring fire hole along a igniting groove on the combustor body so as to ignite the fuel gas output from the outer ring fire hole.

The gas is firstly input into the gas mixing cavity of the burner body, the gas in the gas mixing cavity is output from the inner ring fire hole and the outer ring fire hole, the gas almost reaches the positions of the inner ring fire hole and the outer ring fire hole at the same time, and the flame needs a certain time to move from the ignition groove to the outer ring fire hole, so that when the burner is just started, part of the gas is wasted or is insufficiently combusted, and even the excessive gas is accumulated at the position of the outer ring fire hole to generate a deflagration phenomenon, so that the safety is influenced. In addition, the premixing effect of the gas of the burner is poor when the gas is output from the inner ring fire hole and the outer ring fire hole, and the combustion efficiency is low.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art, and therefore, the utility model provides a multi-chamber burner which is full and safe in combustion, can fully utilize fuel gas and can prevent deflagration during ignition.

According to an embodiment of the present utility model, a multi-chamber burner includes: a burner body having an annular chamber with an upward opening; the annular fire cover is arranged on the burner body and can shield the opening of the annular chamber, and a mixing cavity, an inner ring fire hole and an outer ring fire hole which are communicated with the mixing cavity are defined between the annular fire cover and the annular chamber; the separation piece is arranged in the mixed air cavity to separate the mixed air cavity into a first air transmission cavity and a second air transmission cavity which are communicated with each other, the first air transmission cavity is directly communicated with the inner ring fire hole, and the second air transmission cavity is directly communicated with the outer ring fire hole; the gas transmission pipe is arranged on the burner body, the output end of the gas transmission pipe is obliquely upwards communicated with the bottom of the first gas transmission cavity, and the gas output by the gas transmission pipe can do circular motion around the first gas transmission cavity.

According to the embodiment of the utility model, the multi-chamber combustor has at least the following beneficial effects:

the gas pipe inputs the gas into the first gas transmission cavity obliquely upwards so that the gas and premixed air can do circular motion around the first gas transmission cavity, thereby improving the mixing effect of the gas and the air and being beneficial to the full combustion of the gas; when the gas pipe just starts to input the gas into the gas mixing cavity, the first gas conveying cavity is filled with the gas before overflowing into the second gas conveying cavity, and the time point when the gas in the second gas conveying cavity is output from the outer ring fire hole is delayed from the time point when the gas in the first gas conveying cavity is output from the inner ring fire hole, so that no gas is output from the outer ring fire hole before the gas output from the inner ring fire hole is ignited, the gas is fully utilized, and deflagration can be prevented.

In some implementations of the utility model, the partition is a ring member concentric with the annular chamber, the ring member partitions the gas mixing chamber into the annular first gas transmission chamber and the annular second gas transmission chamber sleeved outside the first gas transmission chamber, and a ventilation gap is formed between the ring member and the bottom wall or the top wall of the gas mixing chamber.

In some implementations of the utility model, the ring member is formed on an inner surface of the annular fire cover, the ring member extending downwardly above a bottom wall of the annular chamber to form the vent gap.

In some implementations of the utility model, the gas delivery outlet is oriented within an area defined by the inner peripheral wall of the annular member and the burner body, and the gas delivered by the gas delivery outlet is capable of rotational movement about the inner peripheral wall of the annular member.

In some implementations of the utility model, a first circular table surface is arranged at the upper end of the outer ring wall body of the annular chamber, a second circular table surface parallel to the first circular table surface is arranged at the periphery of the annular fire cover, and the outer ring fire hole is defined between the first circular table surface and the second circular table surface; the inner ring fire cover is characterized in that a third circular table surface is arranged on the upper end face of the inner ring wall body of the annular cavity, a fourth circular table surface parallel to the third circular table surface is arranged on the inner periphery of the annular fire cover, and an inner ring fire hole is defined between the third circular table surface and the fourth circular table surface.

In some implementations of the utility model, a first annular flange is disposed inside the burner body below the first circular table, a plurality of first support portions capable of being distributed at intervals along the first annular flange are disposed on the annular fire cover, a second annular flange is disposed inside the burner body below the third circular table, and a plurality of second support portions capable of being distributed at intervals along the second annular flange are disposed on the annular fire cover.

In some implementations of the present utility model, the outer surface of the annular fire cover is provided with a plurality of rib groups radially distributed at the center of the annular fire cover, the rib groups include a first rib and a second rib protruding upwards from the outer surface of the annular fire cover and parallel to each other, a igniting groove is defined between the first rib and the second rib, and two ends of the igniting groove are respectively communicated with the inner ring fire hole and the outer ring fire hole.

In some embodiments of the present utility model, one end of the air pipe is formed at the bottom of the burner body and is inclined with the outer bottom wall of the burner body, the other end of the air pipe is provided with a high-pressure air inlet pipe, the high-pressure air inlet pipe is located inside the air pipe and extends along the length direction of the air pipe, a side part of one end of the air pipe away from the burner body is provided with a bypass pipe for sucking air, and the bypass pipe is located behind an output port of the high-pressure air inlet pipe in the gas traveling direction.

In some implementations of the utility model, the gas delivery tube and the burner body are of unitary construction.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a structure of an embodiment of a multi-chamber burner of the present utility model;

FIG. 2 is a schematic cross-sectional view of the embodiment of FIG. 1;

fig. 3 is another cross-sectional schematic view of the embodiment of fig. 1.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 3, a multi-chamber burner in an embodiment of the present utility model includes: a burner body 100 having an annular chamber with an opening upward; the annular fire cover 200 is arranged on the burner body 100 and can shield the opening of the annular chamber, and a mixing cavity 300, an inner ring fire hole 400 and an outer ring fire hole 500 which are communicated with the mixing cavity 300 are defined between the annular fire cover 200 and the annular chamber; a partition 600 provided inside the mixing chamber 300 to partition the mixing chamber 300 into a first gas transmission chamber 310 and a second gas transmission chamber 320 which are communicated with each other, the first gas transmission chamber 310 being directly communicated with the inner ring fire hole 400, the second gas transmission chamber 320 being directly communicated with the outer ring fire hole 500; the gas pipe 700 is arranged on the burner body 100, the output end of the gas pipe 700 is obliquely upwards communicated with the bottom of the first gas conveying cavity 310, and the gas output by the gas pipe 700 can do circular motion around the first gas conveying cavity 310.

It will be appreciated that after the gas output from the inner ring flame holes 400 is ignited, it takes a certain time for the flame to move to the outer ring flame holes 500 along the ignition groove 253, and if the gas in the gas mixing chamber 300 is simultaneously ejected from the inner ring flame holes 400 and the outer ring flame holes 500, the inner ring flame holes 400 can be rapidly ignited by the igniter. However, during the period from the ignition of the inner ring flame holes 400 to the outer ring flame holes 500, a large amount of fuel gas is accumulated around the outer ring flame holes 500, and when the fuel gas at the outer ring flame holes 500 is ignited, a knocking phenomenon occurs. Particularly for a high-power burner, the gas outlet amount is very large, and if the gas cannot be ignited in time, the explosion phenomenon generated during ignition is very dangerous.

Referring to fig. 2 and 3, the gas pipe 700 of the present utility model inputs gas obliquely upward into the first gas transmission chamber 310 so that the gas and premixed air can make a circular motion around the first gas transmission chamber 310, thereby improving the mixing effect of the gas and air, facilitating the full combustion of the gas, and also facilitating the uniform output of the gas; when the gas pipe 700 just starts to input the gas into the gas mixing cavity 300, the gas cannot flow directly and quickly towards the direction of the outer ring fire hole 500 under the blocking effect of the partition 600, the gas overflows into the second gas conveying cavity 320 after the first gas conveying cavity 310 is filled with the gas, which is equivalent to increasing the path of the gas conveyed to the outer ring fire hole 500, and the time point of the gas output from the outer ring fire hole 500 in the second gas conveying cavity 320 is delayed from the time point of the gas output from the inner ring fire hole 400 in the first gas conveying cavity 310, so that no gas is output from the outer ring fire hole 500 before the gas output from the inner ring fire hole 400 is ignited, thereby being beneficial to fully utilizing the gas and preventing deflagration during ignition.

Referring to fig. 2 and 3, in some implementations of the utility model, the divider 600 is a ring member disposed concentric with the annular chamber, the ring member dividing the mixing chamber 300 into a first annular gas-transmitting chamber 310 and a second annular gas-transmitting chamber 320 sleeved outside the first gas-transmitting chamber 310, with a vent gap between the ring member and a bottom or top wall of the mixing chamber 300. After the gas fills the first gas delivery chamber 310, the gas flows into the second gas delivery chamber 320 through the vent gap, and the first gas delivery chamber 310 and the second gas delivery chamber 320 can be well separated by the annular member, so that the gas can reach the outer ring fire hole 500 after being delayed.

Referring to fig. 2 and 3, in some implementations of the utility model, a ring member is formed on the inner surface of annular fire cover 200, the ring member extending downwardly above the bottom wall of the annular chamber to form a vent gap. The ring member and the annular fire cover 200 are integrally formed, which helps to simplify the manufacturing process of the components. Because the output end of the gas pipe 700 is obliquely communicated with the first gas conveying cavity 310 upwards, the ventilation gap is close to the bottom wall of the annular cavity, and the gas cannot directly enter the second gas conveying cavity 320 through the ventilation gap when the first gas conveying cavity 310 is not full of gas, so that delayed output of the gas is ensured.

Referring to fig. 2, in some implementations of the utility model, the output port of the gas delivery pipe 700 is oriented within the area enclosed by the inner peripheral wall of the annular member and the burner body 100, and the gas delivered from the gas delivery pipe 700 is capable of rotational movement about the inner peripheral wall of the annular member. Preferably, the air delivery direction of the air delivery pipe 700 is tangential to the inner circumferential wall of the annular member, and the fuel gas is rotationally moved along the inner circumferential wall of the annular member to be uniformly mixed with the air.

Referring to fig. 2 and 3, in some implementations of the present utility model, a first circular table surface 110 is provided at an upper end of an outer ring wall of the annular chamber, a second circular table surface 210 parallel to the first circular table surface 110 is provided at an outer circumference of the annular fire cover 200, and an outer ring fire hole 500 is defined between the first circular table surface 110 and the second circular table surface 210; the upper end surface of the inner ring wall body of the annular chamber is provided with a third circular table top 120, the inner periphery of the annular fire cover 200 is provided with a fourth circular table top 220 parallel to the third circular table top 120, and an inner ring fire hole 400 is defined between the third circular table top 120 and the fourth circular table top 220. The inner ring fire holes 400 and the outer ring fire holes 500 formed by the above structure are in the shape of a ring, which is beneficial to the diffusion of flame to the periphery and has good combustion effect.

Referring to fig. 2 and 3, in some implementations of the utility model, the burner body 100 is internally provided with a first annular flange 130 located below the first circular table top 110, the annular fire cover 200 is provided with a plurality of first support portions 230 capable of being spaced apart along the first annular flange 130, the burner body 100 is internally provided with a second annular flange 140 located below the third circular table top 120, and the annular fire cover 200 is provided with a plurality of second support portions 240 capable of being spaced apart along the second annular flange 140. The assembly and the positioning between the annular fire cover 200 and the burner body 100 are realized through the above structure, and the structure is simple and ingenious.

Referring to fig. 3, in some embodiments of the present utility model, the outer surface of the annular fire cover 200 is provided with a plurality of rib groups 250 radially distributed at the center of the annular fire cover 200, the rib groups 250 include a first rib 251 and a second rib 252 protruding upward from the outer surface of the annular fire cover 200 and parallel to each other, a firing slot 253 is defined between the first rib 251 and the second rib 252, and two ends of the firing slot 253 are respectively communicated with the inner ring fire hole 400 and the outer ring fire hole 500. The water drops are not easy to enter the ignition groove 253 when falling on the annular fire cover 200, so that the ignition function can be ensured to be used normally.

It can be appreciated that the igniter ignites the gas outputted from the inner ring fire hole 400, the inner ring fire hole 400 burns from the ignition position of the igniter and transfers the flame to the ignition groove 253, and transfers the flame to the outer ring fire hole 500 through the ignition groove 253, and the outer ring fire hole 500 gradually burns and transfers the flame along the outer ring fire hole 500 from the ignition position, eventually burning the entire outer ring fire hole 500. The plurality of ignition grooves 253 are arranged, and ignition is performed at a plurality of positions, so that the time for all ignition of the whole outer ring fire hole 500 can be shortened, and the accumulation of fuel gas in the outer ring fire hole 500 can be reduced.

Referring to fig. 1 and 2, in some embodiments of the present utility model, one end of a gas pipe 700 is formed at the bottom of a burner body 100 and is inclined with an outer bottom wall of the burner body 100, the other end of the gas pipe 700 is provided with a high pressure gas inlet pipe 710, the high pressure gas inlet pipe 710 is located inside the gas pipe 700 and extends in a length direction of the gas pipe 700, a side of one end of the gas pipe 700 remote from the burner body 100 is provided with a bypass pipe 720 for sucking air, and the bypass pipe 720 is located behind an output port of the high pressure gas inlet pipe 710 in a gas traveling direction. It will be appreciated that the high pressure gas inlet pipe 710 is used to connect with an external gas supply device, and gas is fed into the gas inlet pipe 700 from the high pressure gas inlet pipe 710, so that a low pressure is formed near the bypass pipe 720, which is beneficial to sucking air, and the sucked air does not directly collide with the gas, so as to ensure the delivery pressure of the gas.

In some embodiments of the present utility model, in order to reduce the assembly process and simplify the manufacturing process of the burner, the gas pipe 700 and the burner body 100 are integrally formed.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (9)

1. A multi-chamber burner, comprising:

a burner body (100) having an upwardly opening annular chamber;

the annular fire cover (200) is arranged on the combustor body (100) and can shield an opening of the annular chamber, and an air mixing cavity (300) and an inner ring fire hole (400) and an outer ring fire hole (500) which are communicated with the air mixing cavity (300) are defined between the annular fire cover (200) and the annular chamber;

a partition member (600) provided in the interior of the gas mixing chamber (300) to partition the gas mixing chamber (300) into a first gas transmission chamber (310) and a second gas transmission chamber (320) which are communicated with each other, the first gas transmission chamber (310) being directly communicated with the inner ring fire hole (400), and the second gas transmission chamber (320) being directly communicated with the outer ring fire hole (500);

the gas transmission pipe (700) is arranged on the combustor body (100), the output end of the gas transmission pipe (700) is obliquely upwards communicated with the bottom of the first gas transmission cavity (310), and fuel gas output by the gas transmission pipe (700) can circularly move around the first gas transmission cavity (310).

2. A multi-chamber burner according to claim 1, wherein the partition member (600) is an annular member arranged concentrically with the annular chamber, the annular member dividing the gas mixing chamber (300) into the annular first gas transmission chamber (310) and the annular second gas transmission chamber (320) sleeved outside the first gas transmission chamber (310), and a ventilation gap is provided between the annular member and the bottom wall or the top wall of the gas mixing chamber (300).

3. A multi-chamber burner according to claim 2, wherein the ring member is formed on the inner surface of the annular flame cover (200), the ring member extending downwardly above the bottom wall of the annular chamber to form the ventilation gap.

4. A multi-chamber burner according to claim 3, wherein the output port of the gas delivery pipe (700) is directed into the area enclosed by the inner peripheral wall of the circular ring member and the burner body (100), and the gas delivered from the gas delivery pipe (700) can move rotationally around the inner peripheral wall of the circular ring member.

5. The multi-chamber burner according to claim 1, wherein a first circular table surface (110) is provided at an upper end of an outer ring wall of the annular chamber, a second circular table surface (210) parallel to the first circular table surface (110) is provided at an outer periphery of the annular flame cover (200), and the outer ring flame hole (500) is defined between the first circular table surface (110) and the second circular table surface (210); the inner ring fire cover is characterized in that a third circular table top (120) is arranged on the upper end face of the inner ring wall body of the annular cavity, a fourth circular table top (220) parallel to the third circular table top (120) is arranged on the inner periphery of the annular fire cover (200), and an inner ring fire hole (400) is defined between the third circular table top (120) and the fourth circular table top (220).

6. A multi-chamber burner according to claim 5, wherein the burner body (100) is internally provided with a first annular flange (130) located below the first circular table top (110), the annular fire cover (200) is provided with a plurality of first supporting parts (230) which can be distributed at intervals along the first annular flange (130), the burner body (100) is internally provided with a second annular flange (140) located below the third circular table top (120), and the annular fire cover (200) is provided with a plurality of second supporting parts (240) which can be distributed at intervals along the second annular flange (140).

7. The multi-chamber burner according to claim 1, wherein a plurality of rib groups (250) radially distributed in the center of the annular fire cover (200) are arranged on the outer surface of the annular fire cover (200), the rib groups (250) comprise first ribs (251) and second ribs (252) protruding upwards from the outer surface of the annular fire cover (200) and parallel to each other, a fire igniting groove (253) is defined between the first ribs (251) and the second ribs (252), and two ends of the fire igniting groove (253) are respectively communicated with the inner ring fire hole (400) and the outer ring fire hole (500).

8. A multi-chamber burner according to claim 1, wherein one end of the gas pipe (700) is formed at the bottom of the burner body (100) and is inclined with the outer bottom wall of the burner body (100), the other end of the gas pipe (700) is provided with a high-pressure gas inlet pipe (710), the high-pressure gas inlet pipe (710) is located inside the gas pipe (700) and extends in the length direction of the gas pipe (700), a bypass pipe (720) for sucking air is provided at the side of the gas pipe (700) away from one end of the burner body (100), and the bypass pipe (720) is located behind the outlet of the high-pressure gas inlet pipe (710) in the direction of gas traveling.

9. A multi-chamber burner according to claim 8, wherein the gas delivery tube (700) and the burner body (100) are of unitary construction.