CN103672888B - Igniter burner - Google Patents

Abstract

The invention discloses an ignition burner, which comprises: a housing with a cooling air inlet and a gas inlet; a nozzle connected to one end of the housing; a ceramic sleeve arranged in the housing, and a ceramic sleeve An annular gas channel is defined between the tube and the shell, and the gas channel communicates with the gas inlet and the nozzle respectively; the electrode, the electrode passes through the ceramic sleeve and one end extends into the nozzle, and an annular cooling is defined between the electrode and the ceramic sleeve. The air channel and the cooling air channel communicate with the cooling air inlet and the spray head respectively; the air plate is arranged between the ceramic sleeve and the electrode and adjacent to the spray head, and a plurality of air outlet holes are formed on the air plate. According to the ignition burner of the present invention, by setting the air tray with multiple air outlet holes, the cooling air introduced from the cooling air inlet can enter the spray head from the multiple air outlet holes on the air tray, so as to control the electric current in the spray head. Cooling of the pole ends prolongs the life of the electrodes and reduces the cost of electrode replacement.

Description

ignition burner

technical field

The invention relates to the technical field of combustion, in particular to an ignition burner.

Background technique

The traditional ignition burner has problems such as easy burning of the ignition electrode, short service life, difficulty in ignition, and unstable flame detection signal.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the present invention is to propose an ignition burner with a simple structure and a long service life.

The ignition burner according to the embodiment of the present invention includes: a housing, the housing has a cooling air inlet and a gas inlet; a nozzle, the nozzle is connected to one end of the housing; a ceramic sleeve, the ceramic sleeve The pipe is arranged in the housing, and an annular gas passage is defined between the ceramic sleeve and the housing, and the gas passage communicates with the gas inlet and the nozzle respectively; the electrodes pass through One end of the ceramic sleeve extends into the spray head, and an annular cooling air channel is defined between the electrode and the ceramic sleeve, and the cooling air channel communicates with the cooling air inlet and the spray head respectively and a wind disk, the wind disk is arranged between the ceramic sleeve and the electrode and adjacent to the spray head, and a plurality of air outlet holes are formed on the wind disk.

According to the ignition burner of the embodiment of the present invention, by setting the air pan with multiple air outlet holes, the cooling air introduced from the cooling air inlet can enter the nozzle from the multiple air outlet holes on the air disk, thereby The electrode end is cooled, which prolongs the service life of the electrode and reduces the cost of replacing the electrode. In addition, because the cooling air is in the middle, the gas such as gas is outside, and the gas is close to the nozzle, which can delay the oxidation of the nozzle at high temperature. The combustion of cooling air and gas is diffusion combustion, with uniform temperature and no local high temperature, which effectively prolongs the use of the burner life.

In addition, the ignition burner according to the present invention can also have the following additional technical features:

According to an embodiment of the present invention, the plurality of air outlet holes are spaced apart from each other and evenly distributed on the air pan. Thus, the cooling air can uniformly cool the electrode end.

Further, the distances between the plurality of air outlet holes and the center of the air disk are equal and distributed at equal intervals in the circumferential direction.

Optionally, each of the air outlet holes is circular, elliptical, oval or polygonal with more than three sides.

Further, the plurality of air outlet holes are equally spaced in the radial direction of the air disk.

Specifically, each of the air outlet holes is formed in a ring shape.

According to an embodiment of the present invention, an air throttling plate is provided at the cooling air inlet. Therefore, by setting the air throttling piece, the flow of cooling air passing through the air main pipe can be limited. At this time, no matter how the pressure of the air main pipe fluctuates, the air flow through the ignition burner will be limited within a small range. , thus ensuring the stability of the ignition burner.

According to an embodiment of the present invention, a gas throttling plate is provided at the gas inlet. Therefore, by setting the gas throttling piece, the flow rate of the gas such as coal gas introduced from the gas main pipe can be limited. At this time, no matter how the pressure of the gas main pipe fluctuates, the gas flow through the ignition burner will be limited to a small range. Inside, thus ensuring the stability of the ignition burner.

According to an embodiment of the present invention, the free end of the spray head is formed in the shape of a truncated cone. As a result, the ignition burner can be guaranteed to burn in a relatively stable environment, thereby ensuring the combustion stability of the flame.

Optionally, the nozzle is heat-resistant steel or ceramic. As a result, the nozzle can resist high temperature erosion, prolonging the service life of the nozzle.

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

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

1 is a schematic diagram of an ignition burner according to an embodiment of the present invention;

Fig. 2 is a right side view of the pilot burner shown in Fig. 1 .

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "central", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The following describes an ignition burner 100 according to an embodiment of the present invention with reference to FIGS. 1-2 , and the ignition burner 100 is applicable to various ignition burners.

As shown in FIG. 1 and FIG. 2 , an ignition burner 100 according to an embodiment of the present invention includes a housing 1 , a nozzle 2 , a ceramic sleeve 3 , an electrode 4 and a wind disk 5 .

Housing 1 has a cooling air inlet and a gas inlet. Referring to Fig. 1, the housing 1 is generally composed of a plurality of sections of cylindrical tubes with different lateral dimensions. The housing 1 is hollow and the right end of the housing 1 is open. The cooling air inlet and the gas inlet are spaced apart from each other in the length direction of the housing 1. Further, the housing 1 may be provided with a cooling air connector 11 and a gas connector 12, and the cooling air connector 11 and the gas connector 12 are arranged at the cooling air inlet and the gas inlet respectively, so as to facilitate the introduction of cooling air and gas into the housing 1. gas. Optionally, the gas is coal gas. It should be understood that the specific positions of the cooling air inlet and the gas inlet on the casing 1 can be set according to actual requirements, so as to better meet actual requirements.

The spray head 2 is connected to one end of the casing 1 . For example, in the example of Fig. 1, the nozzle 2 is generally a hollow cylindrical tube, and the left and right ends of the nozzle 2 are open, and the nozzle 2 is arranged at the right end of the housing 1. Optionally, the nozzle 2 and the housing 1 can pass through The way of threaded connection is connected as a whole. Specifically, the outer peripheral wall of the right end of the housing 1 is formed with an external thread extending helically along its axial direction, and the inner peripheral wall of the left end of the nozzle 2 is formed with an internal thread. Cooperate, the spray head 2 can be firmly connected to the housing 1.

The ceramic casing 3 is arranged in the casing 1, and an annular gas passage is defined between the ceramic casing 3 and the casing 1, and the gas passage communicates with the gas inlet and the nozzle 2 respectively. Referring to Fig. 1, the ceramic bushing 3 is generally a hollow cylindrical tube, and the right end of the ceramic bushing 3 is open, and the outer diameter of the ceramic bushing 3 is smaller than the inner diameter of the housing 1, optionally, the ceramic bushing 3 and the housing 1 is coaxially arranged, and the outer peripheral wall of the ceramic sleeve 3 and the inner peripheral wall of the housing 1 jointly define a circular gas channel, which is respectively connected with the gas inlet and the nozzle 2, so that the gas entering from the gas inlet, for example Coal gas can enter in the spray nozzle 2 of right end by gas channel.

The electrode 4 passes through the ceramic sleeve 3, and one end of the electrode 4 extends into the shower head 2. An annular cooling air channel is defined between the electrode 4 and the ceramic sleeve 3, and the cooling air channel communicates with the cooling air inlet and the shower head 2 respectively. As shown in Figure 1, the electrode 4 is arranged in the ceramic casing 3, and the right end of the electrode 4 extends out of the right end of the ceramic casing 3 and enters the shower head 2, and the outer diameter of the electrode 4 is smaller than the outer diameter of the ceramic casing 3, optional Ground, the electrode 4 and the ceramic sleeve 3 are coaxially arranged, and the outer peripheral wall of the electrode 4 and the inner peripheral wall of the ceramic sleeve 3 jointly define a circular cooling air channel, and the cooling air channel is connected to the cooling air inlet and the nozzle 2 respectively. Connected, so that the cooling air that enters from the cooling air inlet can enter the spray head 2 at the right end through the cooling air passage. Here, it should be noted that the cooling air can be combustion-supporting air, so there is no need to add an additional cooling air system, which simplifies the structure and reduces the cost.

The air disk 5 is arranged between the ceramic sleeve 3 and the electrode 4 , and the air disk 5 is arranged adjacent to the nozzle 2 , and a plurality of air outlet holes 51 are formed on the air disk 5 . For example, in the example of Fig. 1 and Fig. 2, the air pan 5 is arranged in the cooling air passage, and is positioned at the right end of the ceramic bushing 3, and a plurality of air outlet holes 51 passing through it are formed on the air pan 5, and the cooling air passage The cooling air can pass into the spray head 2 through a plurality of air outlet holes 51. Optionally, the air disc 5 can be fixed by being embedded in the ceramic sleeve 3. The air disc 5 is formed to fit the shape of the ceramic sleeve 3. Shape, such as the wind disk 5 is formed as a circular disk, the center of the wind disk 5 is formed with a through hole passing through it, the electrode 4 can pass through the through hole into the shower head 2, and the through hole is formed in the same shape as the electrode 4 The adapted shape, the tolerances of the through holes of the electrode 4 and the wind disk 5, the outer diameter of the wind disk 5, and the inner diameter of the ceramic sleeve 3 are respectively within a small range, so as to ensure that the cooling air passes through multiple outlets of the wind disk 5. The air hole 51 enters into the spray head 2, thereby ensuring the cooling of the end of the electrode 4 and prolonging the service life of the electrode 4. It should be understood that the number of air outlet holes 51 can be set according to actual requirements, so as to have a better cooling effect.

Furthermore, the ignition burner 100 can be used in conjunction with an ignition transformer, a flame detector and a gas electromagnetic valve to realize functions such as automatic pulse combustion and safety flameout protection. Here, it should be noted that the structures and working principles of the ignition transformer, the flame detector and the gas electromagnetic valve are in the prior art and are well known to those skilled in the art, and will not be described in detail here.

According to the ignition burner 100 of the embodiment of the present invention, by setting the air tray 5 with a plurality of air outlet holes 51, the cooling air introduced from the cooling air inlet can enter the nozzle 2 from the plurality of air outlet holes 51 on the air tray 5 In this way, the end of the electrode 4 in the shower head 2 is cooled, the service life of the electrode 4 is prolonged, and the cost of replacing the electrode 4 is reduced. In addition, since the cooling air is in the middle, the gas such as gas is outside, and the gas is close to the nozzle 2, which can delay the oxidation of the nozzle 2 at high temperature. mouth life.

In an embodiment of the present invention, a plurality of air outlet holes 51 are spaced apart from each other and evenly distributed on the air disk 5 . Further, the distances between the plurality of air outlet holes 51 and the center of the air pan 5 are all equal and distributed at equal intervals in the circumferential direction. With reference to Fig. 2, air outlet hole 51 is a circular hole, and the diameter of a plurality of circular holes is approximately equal, and the center of circle of a plurality of circular holes is the center of a circle with the center of the wind disk 5, with the center of the wind disk 5 to the circular hole. The distance between the centers is on a circle with a radius, so that the cooling air can evenly cool the ends of the electrodes 4 . It should be understood that the air outlet hole 51 may also be oval, oblong, or polygonal with more than three sides.

Further, a plurality of air outlet holes 51 are equally spaced in the radial direction of the air disk 5 (not shown in the figure). For example, in one of the examples of the present invention, each air outlet hole 51 is formed in a ring shape, and a plurality of air outlet holes 51 are spaced apart from each other in the radial direction of the wind disk 5 , and the plurality of air outlet holes 51 and the center of the air disk 5 The distances between them are not equal, while the distances between two adjacent air outlet holes 51 are equal. Of course, the present invention is not limited thereto, and in another example of the present invention, each air outlet hole 51 may also be formed as a discontinuous ring. In another example of the present invention, some of the air outlet holes 51 are formed in a continuous ring shape, and some of the air outlet holes 51 are formed in a discontinuous ring shape.

In one embodiment of the present invention, an air throttling plate 111 is provided at the cooling air inlet. As shown in Figure 1, the air throttling piece 111 can be installed in the cooling air joint 11, which can limit the flow of cooling air passing through the air main pipe. At this time, no matter how the pressure of the air main pipe fluctuates, it will pass through the ignition burner. The air flow of 100 is limited in a small range, thereby ensuring the stability of the ignition burner 100 . Here, it should be noted that the structure of the air main pipe and the like are already in the prior art and are well known to those skilled in the art, and will not be described in detail here.

Further, a gas throttling piece 121 is provided at the gas inlet. As shown in Figure 1, the gas throttling piece 121 can be installed in the gas connector 12, so that the flow of the gas such as coal gas introduced from the gas main pipe can be limited. At this time, no matter how the pressure of the gas main pipe fluctuates, it will pass through the ignition burner. The gas flow rate of 100 is limited within a small range, thereby ensuring the stability of the ignition burner 100 . Here, it should be noted that the structure of the main gas pipe is already in the prior art and is well known to those skilled in the art, and will not be described in detail here.

In one embodiment of the present invention, the free end of the spray head 2 is formed in the shape of a truncated cone. As shown in FIG. 1 , the lateral dimension of the right end of the spray nozzle 2 decreases gradually from left to right, so as to ensure that the ignition burner 100 burns in a relatively stable environment, thereby ensuring the combustion stability of the flame.

Optionally, the spray head 2 is a heat-resistant steel piece or a ceramic piece. For example, the nozzle 2 can be machined with HN heat-resistant steel or ceramics, which can withstand high temperatures of 1300°C, thereby ensuring that the nozzle 2 can resist high-temperature erosion and prolonging the service life of the nozzle 2 . Of course, the present invention is not limited thereto, and the spray head 2 can also be made of other materials.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. An ignition burner, characterized in that it comprises: a housing with a cooling air inlet and a gas inlet; a spray head, the spray head is connected to one end of the housing; A ceramic sleeve, the ceramic sleeve is arranged in the housing, and an annular gas passage is defined between the ceramic sleeve and the housing, and the gas passage communicates with the gas inlet and the nozzle respectively ; An electrode, the electrode passes through the ceramic sleeve and one end extends into the spray head, an annular cooling air passage is defined between the electrode and the ceramic sleeve, and the cooling air passage is respectively connected to the cooling an air inlet communicates with the spray head; and A wind disk, the wind disk is arranged between the ceramic sleeve and the electrode and adjacent to the spray head, and a plurality of air outlet holes are formed on the wind disk. 2 . The ignition burner according to claim 1 , wherein the plurality of air outlet holes are spaced apart from each other and evenly distributed on the air disk. 3 . 3 . The ignition burner according to claim 2 , characterized in that, the distances between the plurality of air outlet holes and the center of the air pan are equal and distributed at equal intervals in the circumferential direction. 4 . 4. The ignition burner according to claim 3, characterized in that each of the air outlet holes is oval, oblong or polygonal with more than three sides. 5. The ignition burner according to claim 2, characterized in that, the plurality of air outlet holes are distributed at equal intervals in the radial direction of the air disk. 6. The ignition burner according to claim 5, characterized in that each of the air outlet holes is formed in a ring shape. 7. The ignition burner according to claim 1, characterized in that an air throttling plate is provided at the cooling air inlet. 8. The ignition burner according to claim 1, characterized in that a gas throttling plate is provided at the gas inlet. 9. The ignition burner according to claim 1, characterized in that, the free end of the spray head is formed in the shape of a truncated cone. 10. The ignition burner according to any one of claims 1-9, characterized in that the nozzle is made of heat-resistant steel or ceramic.