CN114688534B - Atmospheric staged burner and hot water equipment - Google Patents
Atmospheric staged burner and hot water equipment Download PDFInfo
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- CN114688534B CN114688534B CN202011628511.XA CN202011628511A CN114688534B CN 114688534 B CN114688534 B CN 114688534B CN 202011628511 A CN202011628511 A CN 202011628511A CN 114688534 B CN114688534 B CN 114688534B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gas Burners (AREA)
Abstract
本发明涉及一种大气式分段燃烧器及热水设备，在使用过程中，燃气经喷嘴喷出，卷吸周边空气一并进入引射器中进行混合；再由引射器射入引射口中，流入混合槽内。进入混合槽内的气体再次混合，使得燃气与空气混合充分，提高混合气体的均匀度。混合后，气体通过均流孔流入均流腔内，再由均流腔内流向火孔，使得混合气体流出燃烧器体表面，以供点燃。由于本大气式分段燃烧器在燃烧器体与混合槽之间增设均流器，使得混合气体在流出火孔之前依次经过混合槽和均流腔的混合作用，使得燃气与空气充分混合，保证燃烧过程中混合气体成分始终保持均一，从而使得火焰稳定燃烧，极大提升大气式分段燃烧器的燃烧性能。
The present invention relates to an atmospheric segmented burner and a water heating device. During use, the gas is ejected through a nozzle, and the surrounding air is sucked into the ejector for mixing; then the gas is ejected into the ejection port by the ejector and flows into the mixing tank. The gas entering the mixing tank is mixed again, so that the gas and air are fully mixed, thereby improving the uniformity of the mixed gas. After mixing, the gas flows into the flow equalizing cavity through the flow equalizing hole, and then flows from the flow equalizing cavity to the fire hole, so that the mixed gas flows out of the surface of the burner body for ignition. Since the atmospheric segmented burner adds a flow equalizer between the burner body and the mixing tank, the mixed gas passes through the mixing tank and the flow equalizing cavity in sequence before flowing out of the fire hole, so that the gas and air are fully mixed, ensuring that the components of the mixed gas remain uniform during the combustion process, thereby making the flame burn stably, greatly improving the combustion performance of the atmospheric segmented burner.
Description
Technical Field
The invention relates to the technical field of water heating equipment, in particular to an atmospheric sectional burner and water heating equipment.
Background
Atmospheric burners are classified according to primary air ratio, and are classified into diffusion atmospheric burners, and completely premixed atmospheric burners. The air burner is a part of air equipment for premixing, and has the characteristics of short flame, strong firepower, high combustion temperature, capability of burning fuel gas with different properties and the like, so that the air burner becomes the main air burner at present.
The traditional atmospheric burner is formed by assembling an atmospheric burner shell, a plurality of atmospheric burner single sheets and fixed parts, and different load demands are combined by using different amounts of the atmospheric burner single sheets. However, the traditional structure is complex, the production procedures are more, and the structure of the atmospheric sectional burner single chip is limited, so that the atmospheric sectional burner single chip is difficult to apply to cylindrical or cylindrical hot water equipment. Because traditional combustor is limited by design factors such as structure, service environment, cost, etc., the uneven problem of gas and air mixing appears very easily, has influenced the stability that the combustor burns to the use experience of burning characteristic and user has been influenced.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide an atmospheric sectional burner which can effectively ensure the full mixing between fuel gas and air, improve the mixing uniformity of the mixed gas and improve the combustion performance.
The second technical problem to be solved by the invention is to provide a water heating device which can effectively ensure the sufficient mixing between the fuel gas and the air, improve the mixing uniformity of the mixed gas and improve the combustion performance.
The first technical problem is solved by the following technical scheme:
an atmospheric staged burner, the atmospheric staged burner comprising: an ejector; the device comprises a base, wherein at least two mixing tanks and a first air flow channel are arranged on the base at intervals, an injection port is arranged on the bottom of each mixing tank, the injection port is communicated with the ejector, and the first air flow channel is used for introducing secondary air; the combustion assembly comprises a combustor body and a flow equalizer, wherein the flow equalizer is arranged on the base, the flow equalizer covers the notch of the mixing tank, the combustor body is arranged on the flow equalizer, a flow equalizing cavity is formed between the combustor body and the flow equalizer, the flow equalizer is provided with a flow equalizing hole, the flow equalizing cavity is communicated with the mixing tank through the flow equalizing hole, and the combustor body is provided with a fire hole communicated with the flow equalizing cavity.
Compared with the background technology, the atmospheric sectional burner has the beneficial effects that: in the use process, the fuel gas is sprayed out through a nozzle, and the surrounding air is sucked and enters the ejector for mixing; then the mixture is injected into the injection port by the injector and flows into the mixing tank. The gas entering the mixing tank is mixed again, so that the gas and the air are fully mixed, and the uniformity of the mixed gas is improved. After mixing, the gas flows into the flow equalizing cavity through the flow equalizing hole, and flows into the fire hole from the flow equalizing cavity, so that the mixed gas flows out of the surface of the burner body for ignition. This atmospheric type sectional burner adds the flow equalizer between the combustor body and mixing tank for the mixed gas is in proper order through the mixing effect in mixing tank and flow equalizing chamber before flowing out the fire hole, makes gas and air intensive mixing, guarantees that the mixed gas composition remains the homogeneity throughout in the combustion process, thereby makes flame stable combustion, greatly promotes atmospheric type sectional burner's combustion performance. In addition, when the fuel gas is introduced, secondary air flows to the surface of the burner body from the first air flow passage, so that the mixed gas is fully combusted under the participation of the secondary air, and the combustion performance of the atmospheric staged burner is effectively improved.
In one embodiment, the flow equalizer comprises a flow equalizing plate and a surrounding plate, the surrounding plate is arranged on the flow equalizing plate in a surrounding mode, the surrounding plate is arranged on the base, a flow equalizing cavity is formed between the surrounding plate, the flow equalizing plate and the burner body, the flow equalizing plate is arranged in a recessed mode along the direction away from the mixing tank, and the flow equalizing hole is formed in the flow equalizing plate.
In one embodiment, the flow equalizing plate comprises a first flow equalizing section, a second flow equalizing section and a connecting section connected between the first flow equalizing section and the second flow equalizing section, the first flow equalizing section, the connecting section and the second flow equalizing section are sequentially distributed along the radial direction of the base, the first flow equalizing section and the second flow equalizing section are arranged at an included angle relative to the connecting section, the distance D 1 between the first flow equalizing section and the second flow equalizing section is increased from one end, close to the connecting section, of the first flow equalizing section to one end, close to the coaming, of the first flow equalizing section, and at least one of the first flow equalizing section, the second flow equalizing section and the connecting section is provided with a flow equalizing hole.
In one embodiment, the connection section is arranged in the mixing tank towards the injection port, the first flow equalizing section, the second flow equalizing section and the connection section are respectively provided with flow equalizing holes, and the distribution density of the flow equalizing holes on the first flow equalizing section and the distribution density of the flow equalizing holes on the second flow equalizing section are both greater than the distribution density of the flow equalizing holes on the connection section.
In one embodiment, the first current sharing section is closer to the center of the base than the second current sharing section, and an included angle θ 1 between the first current sharing section and the connecting section is larger than an included angle θ 2 between the second current sharing section and the connecting section.
In one embodiment, the enclosing plate comprises a first enclosing edge and a second enclosing edge, the first enclosing edge and the second enclosing edge are arranged along the radial direction of the base, and the distance D 2 between the first enclosing edge and the second enclosing edge is increased from one end, close to the center of the base, of the enclosing plate to one end, close to the edge of the base, of the enclosing plate.
In one embodiment, the flow equalizer is provided with a flange, the burner body is provided with a flange, and when the burner body is arranged on the flow equalizer, the flange can cover the flange after bending.
In one embodiment, the burner body is provided with a first fixing portion, the first fixing portion is provided with a first fixing hole, the current equalizer is provided with a second fixing portion, the second fixing portion is provided with a second fixing hole, and the base is provided with a third fixing hole which is respectively opposite to the first fixing hole and the second fixing hole.
In one embodiment, a second air flow channel is arranged on the base, and the second air flow channel is positioned between the edge of the base and the mixing groove.
In one embodiment, the atmospheric staged combustor further includes a seal disposed between the combustor body and the base.
In one embodiment, the atmospheric staged combustor further comprises an ignition assembly, the base is provided with a mounting hole, more than two mixing tanks are arranged around the periphery of the mounting hole at intervals, and the ignition assembly is positioned in the mounting hole.
In one embodiment, the ejector is disposed perpendicular to the surface of the base.
In one of the embodiments, the cross section obtained by the mixing tank is taken in a plane perpendicular to the depth direction of the mixing tank, and the cross sectional area S tends to increase from the tank bottom of the mixing tank to the notch of the mixing tank.
In one embodiment, the groove wall of the mixing groove includes a first side wall and a second side wall which are disposed opposite to each other, the first side wall and the second side wall are disposed along a radial direction of the base, and a distance D 3 between the first side wall and the second side wall is increased from one end of the mixing groove, which is close to the center of the base, to one end of the mixing groove, which is close to the edge of the base.
The second technical problem is solved by the following technical scheme:
a water heating apparatus comprising an atmospheric staged burner as claimed in any one of the preceding claims.
Compared with the background technology, the hot water equipment provided by the invention has the beneficial effects that: by adopting the atmospheric sectional burner, in the using process, fuel gas is sprayed out through a nozzle, and surrounding air is sucked into an ejector for mixing; then the mixture is injected into the injection port by the injector and flows into the mixing tank. The gas entering the mixing tank is mixed again, so that the gas and the air are fully mixed, and the uniformity of the mixed gas is improved. After mixing, the gas flows into the flow equalizing cavity through the flow equalizing hole, and flows into the fire hole from the flow equalizing cavity, so that the mixed gas flows out of the surface of the burner body for ignition. This atmospheric type sectional burner adds the flow equalizer between the combustor body and mixing tank for the mixed gas is in proper order through the mixing effect in mixing tank and flow equalizing chamber before flowing out the fire hole, makes gas and air intensive mixing, guarantees that the mixed gas composition remains the homogeneity throughout in the combustion process, thereby makes flame stable combustion, greatly promotes atmospheric type sectional burner's combustion performance. In addition, when the fuel gas is introduced, secondary air flows to the surface of the burner body from the first air flow passage, so that the mixed gas is fully combusted under the participation of the secondary air, and the combustion performance of the atmospheric staged burner is effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an atmospheric staged combustor configuration as described in one embodiment;
FIG. 2 is an exploded schematic view of an atmospheric staged combustor configuration as described in one embodiment;
FIG. 3 is a cross-sectional view of an atmospheric staged combustor configuration as illustrated in one embodiment;
FIG. 4 is a schematic view of a base structure according to one embodiment;
FIG. 5 is a second schematic view of a base structure according to one embodiment;
FIG. 6 is a cross-sectional view of a base structure as described in one embodiment;
FIG. 7 is a cross-sectional view of a combustion assembly configuration as described in one embodiment;
fig. 8 is a schematic diagram of a current equalizer according to an embodiment;
FIG. 9 is a schematic view of a burner body configuration as described in one embodiment.
Reference numerals:
100. An atmospheric staged combustor; 110. an ejector; 120. a base; 121. a mixing tank; 1211. a first sidewall; 1212. a second sidewall; 122. a first air flow passage; 123. an injection port; 124. a second air flow passage; 125. a third fixing hole; 126. a mounting hole; 127. a cross section; 130. a combustion assembly; 131. a flow equalizer; 1311. coaming plate; 13111. a first peripheral edge; 13112. a second peripheral edge; 1312. a flow equalizing plate; 13121. a first flow equalizing section; 13122. a second flow equalizing section; 13123. a connection section; 1313. flow equalizing holes; 1314. folding edges; 1315. a second fixing portion; 13151. a second fixing hole; 132. a burner body; 1321. a fire hole; 1322. flanging; 1323. a first fixing portion; 13231. a first fixing hole; 133. a flow equalizing cavity; 140. a seal; 141. a first through hole; 142. a second through hole; 150. an ignition assembly; 160. a compression ring; 170. and a fixing piece.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
In one embodiment, referring to fig. 1,2 and 3, an atmospheric staged burner 100, the atmospheric staged burner 100 comprises: an eductor 110, a base 120, and a combustion assembly 130. At least two mixing grooves 121 and a first air flow passage 122 are arranged on the base 120 at intervals. The tank bottom of the mixing tank 121 is provided with an injection port 123. The injection port 123 communicates with the injector 110. The first air flow passage 122 is for introducing secondary air. The combustion assembly 130 includes a burner body 132 and a flow equalizer 131, the flow equalizer 131 is mounted on the base 120, and the flow equalizer 131 covers the notch of the mixing tank 121. The burner body 132 is mounted on the flow equalizer 131, and a flow equalizing cavity 133 is formed between the burner body and the flow equalizer 131. The current equalizer 131 is provided with a current equalizing hole 1313. The flow equalizing chamber 133 communicates with the mixing tank 121 through flow equalizing holes 1313. The burner body 132 is provided with a fire hole 1321 communicated with the flow equalizing cavity 133.
In the use process of the atmospheric sectional burner 100, the fuel gas is sprayed out through the nozzle, and the ambient air is sucked into the ejector 110 for mixing; and then injected into the injection port 123 from the injector 110, and flows into the mixing tank 121. The gas introduced into the mixing tank 121 is mixed again so that the gas is sufficiently mixed with the air, thereby improving the uniformity of the mixed gas. After mixing, the gas flows into the flow equalizing cavity 133 through the flow equalizing hole 1313, and flows from the flow equalizing cavity 133 to the fire hole 1321, so that the mixed gas flows out of the surface of the burner body 132 for ignition. This atmospheric type staged combustor 100 adds the flow equalizer 131 between the combustor body 132 and mixing tank 121 for the mixed gas is in proper order through the mixing effect of mixing tank 121 and flow equalizing cavity 133 before flowing out fire hole 1321, makes gas and air intensive mixing, guarantees that the mixed gas composition remains the homogeneity throughout in the combustion process, thereby makes flame stable burning, greatly promotes atmospheric type staged combustor 100's combustion performance. In addition, while the fuel gas is introduced, the secondary air also flows from the first air flow passage 122 to the surface of the burner body 132, so that the mixed gas is fully combusted in the presence of the secondary air, thereby effectively improving the combustion performance of the atmospheric staged burner 100. In addition, by controlling the switch valve on the ejector 110, the communication control of different ejection ports 123 is realized, and a small-load, medium-load or large-load combustion mode is formed, so that the multi-section combustion function of the atmospheric burner 100 is realized, and the problem of overhigh temperature rise of the small load in the hot water equipment is better overcome.
It should be noted that, the distribution manner of the current sharing holes 1313 on the current equalizer 131 is various, and the embodiment is not limited specifically, for example: the flow equalizing holes 1313 are distributed in a sector shape, a circular ring shape, a square shape, etc. on the flow equalizer 131. Likewise, the fire holes 1321 may be distributed in the burner body 132 in various manners, such as: the fire holes 1321 are distributed on the flow equalizer 131 in a sector shape, a circular ring shape, a square shape, etc. In addition, the flow equalizing holes 1313 and the fire holes 1321 may have a circular hole, a triangular hole, a square hole, an elliptical hole, a shaped hole, or the like.
Alternatively, the current equalizer 131 may be mounted on the base 120 by bolting, clamping, pinning, welding, riveting, etc. Meanwhile, the burner body 132 may be mounted on the current equalizer 131 by bolting, clamping, pinning, welding, riveting, etc. Of course, during the installation process, the burner body 132 and the flow equalizer 131 may be installed on the base 120 together by the same fixture 170.
Specifically, referring to fig. 2, 8 and 9, the burner body 132 is provided with a first fixing portion 1323. The first fixing portion 1323 is provided with a first fixing hole 13231. The current equalizer 131 is provided with a second fixing portion 1315. The second fixing portion 1315 is provided with a second fixing hole 13151. The base 120 is provided with a third fixing hole 125 disposed opposite to the first fixing hole 13231 and the second fixing hole 13151, respectively, so that the fixing member 170 sequentially penetrates the first fixing hole 13231, the second fixing hole 13151 and the third fixing hole 125 during the assembly process, so that the burner body 132 and the flow equalizer 131 are fixed on the base 120 together. The fixing member 170 may be a bolt, a pin, a rivet, or the like.
It should be further noted that, the mixing tank 121 and the first air flow channel 122 are respectively disposed at intervals on the base 120 in various forms, for example: the mixing groove 121 and the first air flow passage 122 are both disposed along the radial direction of the base 120; or both the mixing tank 121 and the first air flow path 122 may be extended around the center of the base 120, etc. Of course, the number of the mixing grooves 121 and the first air flow channels 122 on the base 120 may be one or more, and the present embodiment is not limited in particular. In addition, the ejector 110 may be vertically disposed, parallel disposed, or disposed at a certain angle on the base 120.
Specifically, referring to fig. 4 and 5, the ejectors 110 are disposed in one-to-one correspondence with the ejection openings 123. Meanwhile, the ejector 110 is vertically arranged on the surface of the base 120, and at this time, the fuel gas in the ejector 110 enters the corresponding mixing tank 121 in a vertical manner, which is beneficial to ejecting primary air.
Further, the mixing tank 121 and the combustion assembly 130 are two or more. More than two mixing tanks 121 are arranged at intervals around the center of the base 120, and at least one first air flow passage 122 is arranged between two adjacent mixing tanks 121. The combustion assemblies 130 are disposed in one-to-one correspondence with the mixing tanks 121. Because this mixing tank 121 is disposed around the center of the base 120 at intervals, the burner body 132 is annularly disposed on the base 120, so that the gas flows out of the surface of the burner body 132 and is annularly disposed, so as to improve the uniformity of the mixed gas on the surface of the burner body 132 and further improve the combustion performance of the atmospheric staged burner 100. In addition, the annular distribution design of more than two burner bodies 132 is also beneficial to simplifying the structure of the atmospheric segmented burner 100, so that the base 120 structure can be designed into a circular or polygonal structure, and the whole atmospheric gas burner can be effectively applied to column-type or cylinder-type water heating equipment. In addition, by controlling the switch valve on the ejector 110, the communication control of different ejection ports 123 is realized, and a combustion mode of small load, medium load or large load is formed, so that the multi-section combustion function of the atmospheric section burner 100 is realized, and the problem of overhigh temperature rise of the small load in the hot water equipment is better overcome.
It should be noted that, the positional relationship between the first air flow channel 122 and the mixing tank 121 is not particularly limited, and the present embodiment is only required to satisfy that at least one first air flow channel 122 penetrating the base 120 is provided between any two adjacent mixing tanks 121. Meanwhile, the distribution of more than two burner bodies 132 on the base 120 may be a split type structure or an integral type structure. When more than two burner bodies 132 are integrally formed on the base 120, the burner bodies 132 may be connected to the burner bodies 132 by arcuate strips or other structures. In addition, the connection between the burner body 132 and the base 120 may be a direct connection or an indirect connection, wherein an intermediate structure is provided between the burner body 132 and the base 120 when the burner body 132 is indirectly connected to the base 120.
Specifically, referring to fig. 4, a first air flow passage 122 penetrating the base 120 is disposed between any two adjacent mixing tanks 121, and the first air flow passage 122 extends along the radial direction of the base 120.
Alternatively, the shape of the base 120 may be circular or polygonal. When the base 120 is circular, the water heater is a cylindrical water heater; when the base 120 is polygonal, the water heater is polygonal column-shaped.
It should be noted that, there are various ways of communication between the ejector 110 and the ejector port 123, for example: the common ejector 110 is respectively communicated with the corresponding ejection ports 123 through a plurality of branch pipes; or the ejectors 110 are arranged in one-to-one correspondence with the ejection openings 123, namely, one ejector 110 is communicated with the corresponding ejection opening 123; or the injector 110 and the injection port 123 may be in one-to-many communication.
Specifically, referring to fig. 4 and 5, the ejectors 110 are disposed in one-to-one correspondence with the ejection openings 123. Meanwhile, the ejector 110 is vertically arranged on the surface of the base 120, and at this time, the fuel gas in the ejector 110 enters the corresponding mixing tank 121 in a vertical manner, which is beneficial to ejecting primary air.
Further, referring to fig. 6, a cross section 127 of the mixing tank 121 is taken in a plane perpendicular to the depth direction of the mixing tank 121. The cross-sectional area 127S tends to increase from the bottom of the mixing tank 121 to the notch of the mixing tank 121. From this, the space in the mixing tank 121 of this embodiment has a flaring structure with a large top and a small bottom. When the gas flows into the mixing tank 121 from the injection port 123, the flowing space of the gas in the mixing tank 121 is changed from small to large, so that the flowing resistance of the gas in the mixing tank 121 is effectively reduced, the pressure loss of the mixed gas is reduced, and the combustion pressure of the gas on the burner body 132 is ensured. Wherein the increasing trend of the cross-sectional area 127S is understood to be a gradual increase; it is also understood that the increase is first followed by the constant increase; or it is understood to increase first, then not change, then increase, last remain unchanged, etc.
It should be noted that, the shape of the mixing tank 121 may be various, and it is only required that the tank wall of the mixing tank 121 has an outward expansion trend from the tank bottom of the mixing tank 121 to the tank opening direction of the mixing tank 121, for example: the mixing tank 121 has an inverted trapezoid shape or an inverted truncated cone shape. In order to facilitate understanding of the depth direction of the mixing tank 121 of the present embodiment, the depth direction of the mixing tank 121 is indicated by any arrow S 0 in fig. 6, for example, in fig. 6.
In one embodiment, referring to fig. 4, the groove wall of the mixing groove 121 includes a first side wall 1211 and a second side wall 1212 disposed opposite to each other. The first side wall 1211 and the second side wall 1212 are disposed along the radial direction of the base 120, that is, the first side wall 1211 and the second side wall 1212 are radially distributed on the base 120. Since the distance D 3 between the first side wall 1211 and the second side wall 1212 increases from the end of the mixing tank 121 near the center of the base 120 to the end of the mixing tank 121 near the edge of the base 120, the mixing tank 121 has a fan-shaped radial shape on the base 120. In this way, the design of the mixing tank 121 is in a fan-shaped radial shape, so that the flow distribution of the mixed gas flowing out of the mixing tank 121 is that the flow distribution is in an increasing trend from one end of the mixing tank 121 close to the center of the base 120 to the edge of the mixing tank 121 close to the base 120, which is beneficial to reducing the gas pressure at the center of the atmospheric type segmented burner 100, ensuring that the periphery of the atmospheric type segmented burner 100 has enough gas quantity, leading the gas on the surface of the burner body 132 to be evenly distributed, and greatly improving the combustion performance of the gas. Wherein, the increasing trend of the distance D 3 is understood as increasing gradually; it is also understood that the increase is first followed by the constant increase; or it is understood to increase first, then not change, then increase, last remain unchanged, etc.
Further, referring to fig. 7, the current equalizer 131 includes a current equalizing plate 1312 and a shroud 1311. The shroud 1311 is disposed around the flow equalization plate 1312, the shroud 1311 is disposed on the base 120, and a flow equalization cavity 133 is formed between the shroud 1311, the flow equalization plate 1312, and the burner body 132. The flow equalization plates 1312 are concavely disposed in a direction away from the inside of the mixing tank 121. The flow equalization holes 1313 are provided on the flow equalization plate 1312. Because the flow equalization plate 1312 is recessed along the direction away from the mixing tank 121, the middle of the flow equalization plate 1312 is generally lower than the edge of the flow equalization plate 1312, so that the flow equalization plate 1312 is in or approximately in a flaring structure, which is beneficial to the diffusion of the gas entering the flow equalization cavity 133 towards the periphery of the flow equalization plate 1312, and ensures the uniform distribution of the gas in the flow equalization cavity 133.
Alternatively, the flow equalization plate 1312 may be an inverted trapezoidal plate; or an arc-shaped plate; or an inverted triangle plate, etc. Meanwhile, the cross-section 127 of the shroud 1311 may be circular, elliptical, triangular, trapezoidal, quadrangular, or other polygonal shape, etc.
Specifically, referring to fig. 8, the shroud 1311 includes a first peripheral edge 13111 and a second peripheral edge 13112. The first peripheral edge 13111 and the second peripheral edge 13112 are disposed along the radial direction of the base 120, that is, the first peripheral edge 13111 and the second peripheral edge 13112 are radially distributed in the mixing tank 121. Since the distance D 2 between the first peripheral edge 13111 and the second peripheral edge 13112 increases from the end of the shroud 1311 near the center of the base 120 to the end of the shroud 1311 near the edge of the base 120, the flow equalizer 131 has a fan-shaped radial shape on the base 120. In this way, the appearance of the flow equalizer 131 is designed to be in a fan-shaped radial shape, so that the flow of the mixed gas flowing into the fire hole 1321 is distributed to be in an increasing trend from one end of the flow equalizer 131 close to the center of the base 120 to the edge of the flow equalizer 131 close to the base 120, which is beneficial to reducing the gas pressure of the center of the atmospheric type segmented burner 100, ensuring enough gas quantity around the atmospheric type segmented burner 100, enabling the gas on the surface of the burner 132 to be uniformly distributed, and greatly improving the combustion performance of the gas.
Further, referring to fig. 7, the current sharing plate 1312 includes a first current sharing section 13121, a second current sharing section 13122, and a connecting section 13123 connected between the first current sharing section 13121 and the second current sharing section 13122. The first current sharing section 13121, the connecting section 13123 and the second current sharing section 13122 are sequentially distributed along the radial direction of the base 120, the first current sharing section 13121 and the second current sharing section 13122 are arranged at an included angle relative to the connecting section 13123, and the distance D 1 between the first current sharing section 13121 and the second current sharing section 13122 is in an increasing trend from one end of the first current sharing section 13121, which is close to the connecting section 13123, to one end of the first current sharing section 13121, which is close to the surrounding plate 1311. Therefore, the flow equalizing plate 1312 in the present embodiment includes at least three sections, and the first flow equalizing section 13121 and the second flow equalizing section 13122 are in an edge-expanding structure relative to the connecting section 13123, so that the gas entering the flow equalizing cavity 133 has flowing tendencies toward the center of the base 120 and the edge of the base 120 in the radial direction of the base 120, which ensures that the gas in the flow equalizing cavity 133 is more uniformly distributed, thereby improving the combustion stability of the atmospheric type staged combustor 100.
Specifically, referring to fig. 7, the first flow equalizing section 13121, the connecting section 13123 and the second flow equalizing section 13122 are in an integrated structure.
In one embodiment, referring to fig. 8, the connection section 13123 is disposed in the mixed flow slot towards the injection port 123, and the distribution density of the flow equalizing holes 1313 on the first flow equalizing section 13121 and the distribution density of the flow equalizing holes 1313 on the second flow equalizing section 13122 are both greater than the distribution density of the flow equalizing holes 1313 on the connection section 13123, so that the distribution densities of the flow equalizing holes 1313 on the first flow equalizing section 13121, the connection section 13123 and the second flow equalizing section 13122 are reasonably controlled, so that the airflow distribution on the surface of the flow equalizing plate 1312 is more balanced. Of course, in other embodiments, the equalizing holes 1313 may be equally distributed on the first equalizing section 13121, the connecting section 13123 and the second equalizing section 13122.
In one embodiment, referring to fig. 7, the first flow equalizing section 13121 is closer to the center of the base 120 than the second flow equalizing section 13122, and the included angle θ 1 between the first flow equalizing section 13121 and the connecting section 13123 is larger than the included angle θ 2 between the second flow equalizing section 13122 and the connecting section 13123, so that the first flow equalizing section 13121 is more sloped than the second flow equalizing section 13122, so that the space above the second flow equalizing section 13122 is larger than the space above the first flow equalizing section 13121, and further more mixed gas flows toward the edge of the base 120, and the periphery of the burner body 132 is ensured to have sufficient gas supply.
In one embodiment, referring to fig. 7, the current equalizer 131 is provided with a flange 1314. The burner body 132 is provided with a flange 1322. When the burner body 132 is arranged on the flow equalizer 131, the flanging 1322 can wrap the flanging 1314 after being bent, so that the combination between the flow equalizer 131 and the burner body 132 is more stable, and the stability of the integral structure of the atmospheric type segmented burner 100 is improved.
In one embodiment, referring to fig. 2, a second air flow channel 124 is provided on the base 120. The second air flow passage 124 is located between the edge of the base 120 and the mixing tank 121, so that a portion of the secondary air flows out of the second air flow passage 124 during the combustion process, providing sufficient air for the flame combustion around the burner body 132, and ensuring sufficient combustion.
Further, referring to fig. 2, the number of the second air flow channels 124 is more than two, and the more than two second air flow channels 124 are spaced around the center of the base 120.
In one embodiment, referring to FIG. 2, the atmospheric staged combustor 100 also includes a seal 140. The sealing member 140 is disposed between the burner body 132 and the base 120, so as to improve the sealing performance between the burner body 132 and the base 120, so as to ensure a reliable sealing and no air leakage between the base 120 and the burner body 132.
Specifically, referring to fig. 2, the sealing member 140 is disposed between the flow equalizer 131 and the base 120. Meanwhile, the sealing member 140 is a rubber pad.
Further, referring to fig. 2, the sealing member 140 is provided with a first through hole 141 and a second through hole 142. The first through holes 141 are provided in one-to-one correspondence with the mixing grooves 121. The second through holes 142 are disposed in one-to-one correspondence with the first air flow channels 122.
In one embodiment, referring to fig. 2 and 4, the atmospheric staged combustor 100 further includes an ignition assembly 150. The base 120 is provided with mounting holes 126. The two or more mixing grooves 121 are spaced around the periphery of the mounting hole 126, and the ignition module 150 is positioned in the mounting hole 126 such that the ignition module 150 is stably installed at the middle of the base 120, so that the ignition module 150 stably ignites the peripheral fuel gas.
Further, referring to fig. 2, the atmospheric staged combustor 100 further includes a pressure ring 160, and the pressure ring 160 is mounted on the base 120 and connected to one end of the combustor body 132. The ignition assembly 150 is mounted on the compression ring 160.
In one embodiment, referring to fig. 1 and 3, a water heating apparatus includes an atmospheric staged burner 100 according to any of the above embodiments.
In the above water heating apparatus, the above atmospheric sectional burner 100 is adopted, and in the use process, the fuel gas is sprayed out through the nozzle, and the surrounding air is sucked into the ejector 110 for mixing; and then injected into the injection port 123 from the injector 110, and flows into the mixing tank 121. The gas introduced into the mixing tank 121 is mixed again so that the gas is sufficiently mixed with the air, thereby improving the uniformity of the mixed gas. After mixing, the gas flows into the flow equalizing cavity 133 through the flow equalizing hole 1313, and flows from the flow equalizing cavity 133 to the fire hole 1321, so that the mixed gas flows out of the surface of the burner body 132 for ignition. This atmospheric type staged combustor 100 adds the flow equalizer 131 between the combustor body 132 and mixing tank 121 for the mixed gas is in proper order through the mixing effect of mixing tank 121 and flow equalizing cavity 133 before flowing out fire hole 1321, makes gas and air intensive mixing, guarantees that the mixed gas composition remains the homogeneity throughout in the combustion process, thereby makes flame stable burning, greatly promotes atmospheric type staged combustor 100's combustion performance. In addition, while the fuel gas is introduced, the secondary air also flows from the first air flow passage 122 to the surface of the burner body 132, so that the mixed gas is fully combusted in the presence of the secondary air, thereby effectively improving the combustion performance of the atmospheric staged burner 100.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. An atmospheric staged burner, characterized in that the atmospheric staged burner (100) comprises:
an ejector (110);
The device comprises a base (120), wherein a first air flow channel (122) and at least two mixing tanks (121) are arranged on the base (120) at intervals, an injection port (123) is formed in the bottom of each mixing tank (121), the injection port (123) is communicated with the ejector (110), and the first air flow channel (122) is used for introducing secondary air;
The combustion assembly (130), the combustion assembly (130) comprises a burner body (132) and a flow equalizer (131), the flow equalizer (131) is arranged on the base (120), the flow equalizer (131) covers a notch of the mixing tank (121), the burner body (132) is arranged on the flow equalizer (131) and forms a flow equalizing cavity (133) with the flow equalizer (131), the flow equalizer (131) is provided with a flow equalizing hole (1313), the flow equalizing cavity (133) is communicated with the mixing tank (121) through the flow equalizing hole (1313), and the burner body (132) is provided with a fire hole (1321) communicated with the flow equalizing cavity (133);
The flow equalizer (131) comprises a flow equalizing plate (1312) and a surrounding plate (1311), the surrounding plate (1311) is arranged on the flow equalizing plate (1312) in a surrounding mode, the surrounding plate (1311) is arranged on the base (120), a flow equalizing cavity (133) is formed between the surrounding plate (1311), the flow equalizing plate (1312) and the combustor body (132), the flow equalizing plate (1312) is arranged in a recessed mode along the direction deviating from the inner direction of the mixing tank (121), and the flow equalizing holes (1313) are formed in the flow equalizing plate (1312);
The flow equalization plate (1312) comprises a first flow equalization section (13121), a second flow equalization section (13122) and a connecting section (13123) connected between the first flow equalization section (13121) and the second flow equalization section (13122), the first flow equalization section (13121), the connecting section (13123) and the second flow equalization section (13122) are sequentially distributed along the radial direction of the base (120), the first flow equalization section (13121) and the second flow equalization section (13122) are arranged at an included angle relative to the connecting section (13123), a distance D 1 between the first flow equalization section (13121) and the second flow equalization section (13122) is from one end, close to the connecting section (13123), of the first flow equalization section (13121) to one end, close to the surrounding plate (1311), of the first flow equalization section (13121), the second flow equalization section (13122) and the connecting section (13123) are provided with at least one flow equalization hole (1313).
2. The atmospheric staged burner as claimed in claim 1, wherein the connecting section (13123) is arranged in the mixing tank (121) towards the injection port (123), the first flow equalizing section (13121), the second flow equalizing section (13122) and the connecting section (13123) are provided with flow equalizing holes (1313), and the distribution density of the flow equalizing holes (1313) in the first flow equalizing section (13121) and the distribution density of the flow equalizing holes (1313) in the second flow equalizing section (13122) are larger than the distribution density of the flow equalizing holes (1313) in the connecting section (13123).
3. The atmospheric staged burner of claim 1, wherein the first flow equalizing section (13121) is closer to the center of the base (120) than the second flow equalizing section (13122), and an angle θ 1 between the first flow equalizing section (13121) and the connecting section (13123) is greater than an angle θ 2 between the second flow equalizing section (13122) and the connecting section (13123).
4. The atmospheric staged burner of claim 1, wherein the shroud (1311) includes a first peripheral edge (13111) and a second peripheral edge (13112), the first peripheral edge (13111) and the second peripheral edge (13112) are disposed along a radial direction of the base (120), and a distance D 2 between the first peripheral edge (13111) and the second peripheral edge (13112) increases from an end of the shroud (1311) near a center of the base (120) to an end of the shroud (1311) near an edge of the base (120).
5. The atmospheric staged burner as claimed in claim 1, wherein the flow equalizer (131) is provided with a flange (1314), the burner body (132) is provided with a flange (1322), and when the burner body (132) is mounted on the flow equalizer (131), the flange (1322) can cover the flange (1314) after being bent.
6. The atmospheric staged burner according to claim 1, wherein the burner body (132) is provided with a first fixing portion (1323), the first fixing portion (1323) is provided with a first fixing hole (13231), the flow equalizer (131) is provided with a second fixing portion (1315), the second fixing portion (1315) is provided with a second fixing hole (13151), and the base (120) is provided with a third fixing hole (125) which is respectively opposite to the first fixing hole (13231) and the second fixing hole (13151).
7. An atmospheric staged burner according to any of claims 1-6, wherein the base (120) is provided with a second air flow channel (124), the second air flow channel (124) being located between the edge of the base (120) and the mixing tank (121).
8. The atmospheric staged burner according to any one of claims 1-6, wherein the atmospheric staged burner (100) further comprises a seal (140), the seal (140) being arranged between the burner body (132) and the base (120); and/or the number of the groups of groups,
The atmospheric type segmented burner (100) further comprises an ignition assembly (150), wherein the base (120) is provided with mounting holes (126), more than two mixing grooves (121) are arranged at intervals around the periphery of the mounting holes (126), and the ignition assembly (150) is positioned in the mounting holes (126); and/or the number of the groups of groups,
The ejector (110) is arranged perpendicular to the surface of the base (120).
9. The atmospheric staged burner according to any of claims 1-6, characterized in that a cross section (127) obtained by the mixing tank (121) is taken in a plane perpendicular to the depth direction of the mixing tank (121), the cross section (127) area S having an increasing tendency from the bottom of the mixing tank (121) to the notch of the mixing tank (121); and/or the number of the groups of groups,
The groove wall of the mixing groove (121) comprises a first side wall (1211) and a second side wall (1212) which are oppositely arranged, the first side wall (1211) and the second side wall (1212) are arranged along the radial direction of the base (120), and a distance D 3 between the first side wall (1211) and the second side wall (1212) is increased from one end, close to the center of the base (120), of the mixing groove (121) to one end, close to the edge of the base (120), of the mixing groove (121).
10. A water heating apparatus, characterized in that it comprises an atmospheric staged burner (100) according to any of claims 1-9.
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| KR20120108672A (en) * | 2011-03-25 | 2012-10-05 | 주식회사 부-스타 | Pre-mixer for metal fiber mat burner |
| WO2014127726A1 (en) * | 2013-02-20 | 2014-08-28 | 浙江美大实业有限公司 | Air-blowing full, pre-mixed integrated stove |
| CN109404906A (en) * | 2017-08-16 | 2019-03-01 | 芜湖美的厨卫电器制造有限公司 | Burner and gas heater |
| CN212901988U (en) * | 2020-05-26 | 2021-04-06 | 江苏叶茂厨卫科技有限公司 | Fire grate, burner and water heater for realizing thick and thin combustion |
| CN112097258A (en) * | 2020-09-14 | 2020-12-18 | 广东万和新电气股份有限公司 | Combustion device and gas water heating equipment |
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