CN112212328A - Burner and use thereof - Google Patents

Burner and use thereof Download PDF

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Publication number
CN112212328A
CN112212328A CN202011212593.XA CN202011212593A CN112212328A CN 112212328 A CN112212328 A CN 112212328A CN 202011212593 A CN202011212593 A CN 202011212593A CN 112212328 A CN112212328 A CN 112212328A
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CN
China
Prior art keywords
gas
combustion
burner
main frame
frame body
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Pending
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CN202011212593.XA
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Chinese (zh)
Inventor
李为臻
张景才
张涛
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Dalian Institute of Chemical Physics of CAS
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Dalian Institute of Chemical Physics of CAS
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Application filed by Dalian Institute of Chemical Physics of CAS filed Critical Dalian Institute of Chemical Physics of CAS
Priority to CN202011212593.XA priority Critical patent/CN112212328A/en
Publication of CN112212328A publication Critical patent/CN112212328A/en
Priority to US18/002,162 priority patent/US20230349549A1/en
Priority to PCT/CN2021/133947 priority patent/WO2022096021A1/en
Priority to GB2300587.9A priority patent/GB2612478A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges
    • 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
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings

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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)

Abstract

The invention provides a combustor. The invention comprises a shell, a fan, a combustion head and an ignition mechanism, wherein an air inlet of the shell and an input end of the combustion head form a pressure equalizing cavity, the output end of the combustion head is provided with the ignition mechanism, the combustion head comprises a main frame body and at least one stable combustion isolation strip, the stable combustion isolation strip divides the interior of the main frame body into at least two ventilation areas along the direction of a gas channel, a plurality of separation mechanisms are arranged in each ventilation area, the separation mechanisms divide the ventilation areas into a plurality of through holes which are distributed along the direction of the gas channel, the through holes are used for passing mixed gas and strengthening the mixing effect of the mixed gas, and the stable combustion isolation strip can divide the combustion flame of the combustion surface of the main frame body into mutually independent. The power of the combustion part can be changed along with the area of the combustor, the fuel gas and the air are highly and uniformly mixed after entering the micropore channel, and are sprayed out of the micropore channel and then ignited to form uniform premixed flames, and the flame is mutually independent due to the arrangement of the isolation belt, stable, clean and efficient.

Description

Burner and use thereof
Technical Field
The invention relates to the technical field of combustion equipment, in particular to a combustor and application thereof.
Background
The burner is a general term for a device for ejecting fuel and air in a certain manner to perform mixed combustion. The burners are classified into industrial burners, civil burners and special burners according to types and application fields. Commonly used household burners include gas boilers, gas ranges, high fire gas ranges, infrared gas ranges, and combustion heads of gas water heaters.
The power of the gas boiler is more than 200kW, and the gas is sprayed out from the small hole, mixed with air blown into the large cylinder by the fan, and ignited to form integral cylindrical conical flame. The traditional burner head is formed by mixing fuel gas with air in a combustion disc and igniting the fuel gas, belongs to diffusion flame combustion, and has the advantages of simple structure, mature technology, low cost and high emission concentration of CO and NOx. The main body of the full-premixing metal fiber surface combustion head is a temperature-resistant metal fiber net, a full-premixing fan and a valve group are required to be matched for use, the flame length is shortened, the local high temperature is avoided, the combustion time is reduced, so that the nitrogen reduction is realized, although the emission concentration of CO and NOx is low, the cost is high, and the risk of blockage and tempering of a combustor exists; the staged combustion head (dense-dilute combustion head) introduces air or fuel into a furnace in multiple stages to complete combustion, reduces generated NOx into N2 by manufacturing reducing atmosphere to realize nitrogen reduction, and has the advantages of relatively complex structure, mature technology, higher cost, limited nitrogen reduction effect (difficult to achieve ultra-low emission) and high CO emission concentration.
The power of the gas stove is 3-5kW, the pipeline gas is ejected from the small holes arranged on the inner disc and the outer ring after ejecting air, and the flame is divided into two layers after ignition: the fuel gas and the injected air form rich-combustion premixed combustion flame inside; the residual fuel forms a diffusion combustion flame with ambient air on the outside. The traditional cooking range is characterized in that gas is used for injecting primary air into a cooking range structure and mixing the primary air, premixed gas is ignited and then contacts with secondary air through diffusion to complete a combustion process, and the traditional cooking range is simple in structure, mature in technology and low in cost, but is low in heat efficiency and high in emission concentration of CO and NOx; the combustion plate of the infrared stove is a porous ceramic plate, gas injects air to enter the stove head for mixing, the ceramic plate is heated by flame combustion to convert into infrared combustion, but the ceramic is easy to damage, the combustion-supporting gas is insufficient, the combustion is easy to be insufficient, the cost is high, the heat efficiency is high, and the emission concentration of NOx and CO is high; the burner structure of the high fire stove has no special part, requires high gas pressure, generally injects combustion-supporting air and provides combustion-supporting air by a fan, and the like, has simple structure, mature technology and low cost, but has low thermal efficiency and high emission concentration of CO and NOx.
The power of the strong fire stove is 5-30 kW; after the gas in the pipeline and the air blown out by the fan are mixed in the pipeline, the gas is sprayed out from the holes arranged on the inner disc and the outer ring, and after ignition, oxygen-enriched flame is formed, so that the firepower is strong, the temperature is high, but the combustion is uneven, and the emission of CO and NOx is high.
The power of the infrared stove is 3-5 kW; after the gas in the pipeline is used for ejecting air and ignited from the honeycomb disc, the flame retracts into a honeycomb pore channel to carry out short flame combustion, the heated honeycomb body forms a high-temperature heat accumulator to emit infrared rays for heating, and the infrared burner is basically the same as the infrared stove in structure and characteristics, mainly burns in the pore channel, has limited power and is easy to damage.
The power of the water heater and the wall-mounted furnace is 20-70 kW; the fuel gas and part of air blown by the fan enter the fire grate and are sprayed out from the small holes, after ignition, rich-combustion premixed flame is formed, and the fuel which is not completely combusted and the rest of air sprayed out from the fire grate gap are continuously subjected to diffusion combustion. In the traditional pipe type fire grate, the gas injects primary air to enter a pipe structure and mix, and the premixed gas is ignited and then contacts with secondary air through diffusion to complete the combustion process, so that the structure is simple, the technology is mature, the cost is low, but the emission concentration of CO and NOx is high; the fire grate structure of the thick and thin fire grate is similar to a pipe type fire grate, and NOx is reduced into N by producing reducing atmosphere through staged combustion2The purpose of reducing nitrogen is achieved, but the structure is complex, the cost is high, and although the NOx emission concentration is low, the CO emission concentration is high; the water-cooling fire grate mainly comprises a combination of a traditional fire grate and a water-cooling copper pipeThe nitrogen reduction is realized by reducing the flame temperature through heat exchange, the technology is mature, the cost is high, the NOx emission concentration is low, but the structure is complex, and the CO emission concentration is high; the main body of the full premix metal fiber surface burner is a temperature-resistant metal fiber net, a full premix fan and a valve group are required to be matched for use, local high temperature is avoided by shortening flame length, combustion time is reduced to reduce nitrogen, and although NOx and CO emission concentration is low, the full premix metal fiber surface burner has the defects of high cost and burner blockage and backfire risks.
The publication No. CN 108006629 a, "burner and gas water heater with the same", discloses a burner with a first rich combustion chamber, a second rich combustion chamber and a lean combustion chamber, however, only one flame is actually formed in one of the combustion units, the middle part of the flame is lean combustion flame, the two sides are rich combustion flames, the unburned fuel of the rich combustion flames and the surplus oxygen of the lean flame are collected at the tail end of the flame and then are subjected to secondary combustion, and the first blind road and the second blind road are arranged to play a role in separating the rich flame from the lean flame, and cannot separate the whole flame.
In conclusion, the existing mature technology of the combustion assembly with low manufacturing cost has high pollutant emission and is not beneficial to environmental protection; the technology with relatively low pollutant discharge is not beneficial to popularization due to overhigh manufacturing cost.
Disclosure of Invention
In view of the above-mentioned technical problems, a burner with good combustion effect and low cost of discharged pollutants and its application are provided. The technical means adopted by the invention are as follows:
a burner comprises a shell, a fan, a burner head and an ignition mechanism, wherein the shell comprises an air inlet, the air inlet and the input end of the combustion head form a pressure equalizing cavity, the fan can blow the mixed gas of gas and air through the combustion head to complete the uniform mixing of the mixed gas, the output end of the combustion head is provided with the ignition mechanism, which is used for igniting the mixture of gas and air, the combustion head comprises a main frame body and at least one stable combustion isolation belt, the stable combustion isolation belt divides the interior of the main frame body into at least two ventilation areas along the direction of the gas channel, a plurality of separation mechanisms are arranged in each ventilation area, the separation mechanism divides the ventilation area into a plurality of through holes which are distributed along the direction of the gas channel and are used for passing the mixed gas and strengthening the mixing effect of the mixed gas and the gas channel, the stable combustion isolation belt can separate combustion flame on the combustion surface of the main frame body into mutually independent flames.
Furthermore, a micro-channel rectifier is further arranged in the pressure equalizing cavity, and a secondary gas pressure equalizing mixing cavity is formed between the micro-channel rectifier and the combustion head.
Further, the air outlet of the fan is connected to the air inlet of the shell, and the fuel gas outlet of the fuel gas pipeline is connected to the front of the air inlet or the rear of the air outlet of the fan.
Further, still include the tobacco pipe, the air intake connection of fan is at the outlet flue of casing, the tobacco pipe is connected at the air outlet of fan, and the gas outlet connection of gas pipeline is behind the air intake of casing.
Furthermore, the stable combustion isolation belt is attached to the surface of the main frame body, or penetrates through the thickness direction of the main frame body, or extends into the main frame body for a preset length; the stable combustion isolation belt is fixed on the main frame body, and the ventilation area is embedded in the main frame body; or the ventilation area is fixed on the main frame body, and the stable combustion isolation belt is attached to the main frame body; or the ventilation area is fixed on the stable combustion isolation belt, and the ventilation area and the stable combustion isolation belt are integrally fixed on the main frame body, or the whole structure is integrally formed.
Further, the cross-sectional area S of a single through-hole was 0.1mm2≤SHole(s)≤9mm2(ii) a The ventilation area is embodied as a continuous combustion hole with a cross-sectional area Sn of 30mm2≤Sn≤22500mm2(ii) a The thickness of the hole wall, i.e. the thickness of the separating means, is not less than 0.03mmHole(s)Not more than 3mm, and the wall thickness of the main frame body is not less than 0.03mm and not more than dOuter coverLess than or equal to 50 mm; the thickness/height h of the ventilation area satisfies that h is more than or equal to 4mm and less than or equal to 1000 mm; width D of the stable combustion isolation belt1The total length of 3-10 through holes, the stable combustion isolation belt is continuous or discontinuous, and the width D of the discontinuous section is2The total length of 1-2 through holes; the width D of the stable combustion isolation belt is larger than or equal to 2mm and smaller than or equal to 50 mm.
The utility model provides a gas-cooker, includes the combustor, wherein, the casing includes inner circle combustor casing and outer lane combustor casing, the burner includes outer lane burner and inner circle burner, and the outer lane burner sets up in the outer lane combustor casing, and the inner circle burner sets up in the inner circle combustor casing, exists predetermined distance between inner circle burner and the outer lane burner, and the gas channel includes trunk line and inner circle combustor gas pipe and outer lane combustor gas pipe rather than continuous, the input that the burning of inner circle combustor gas pipe output enters inner circle combustor burner through inner circle combustor gas distribution structure, the burning of outer lane combustor gas pipe output enters the input of outer lane combustor burner through outer lane combustor gas distribution structure.
A low-nitrogen burner for a gas boiler comprises the burner.
A gas water heater comprises a burner, a smoke tube is connected with the output end of a burning head, a burning cavity is formed between the smoke tube and the burning head, a heat exchanger is arranged in the burning cavity, the heat exchanger absorbs the heat of high-temperature smoke in the burning cavity and transmits the heat to water in a coil tube, and the smoke tube is connected with a smoke outlet of a shell.
The gas heating water heater comprises a burner, a smoke tube is connected with the output end of a burner head, a combustion cavity is formed between the smoke tube and the burner head, a main heat exchanger is arranged in the combustion cavity, absorbs heat of high-temperature smoke in the combustion cavity and transfers the heat to water in a coil, a secondary heat exchanger is used for transferring heat of primary hot water coming out of the main heat exchanger to secondary heat exchange water, and the smoke tube is connected with a smoke outlet of a shell.
The power of the combustion part can be changed along with the area of the combustor, fuel gas and air are highly uniformly mixed after entering the micropore channel, the fuel gas and the air are sprayed out of the micropore channel and then are ignited to form uniform premixed flame, the arrangement of the isolation belts ensures that the flames are mutually independent, the separated flames form a pyramid-like shape (the flames are in a hollow cone shape), the flames are stable, unstable continuous flames are effectively avoided from being formed, and the combustion is stable. The micro-channel structure in the field of catalyst carriers is applied to the field of combustion, the large-scale reconstruction of the existing appliance is not needed, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a burner according to an embodiment of the present invention.
Fig. 2 is a schematic view of a burner head according to embodiment 1 of the present invention.
Fig. 3 is a schematic view of a burner head according to embodiment 2 of the present invention.
Fig. 4 is a schematic view of a burner head according to embodiment 3 of the present invention.
Fig. 5 is a schematic view of a burner head according to embodiment 4 of the present invention.
Fig. 6 is a schematic diagram illustrating a discontinuous state of a stable combustion isolation zone in the embodiment of the present invention.
Fig. 7 is a schematic structural view of a gas range in embodiment 5 of the present invention.
Fig. 8 is a schematic structural view of a low-nitrogen burner for a gas boiler according to embodiment 6 of the present invention.
Fig. 9 is a schematic structural view of a gas water heater in embodiment 7 of the present invention.
Fig. 10 is a schematic structural view of a gas-fired water heating furnace according to embodiment 8 of the present invention.
FIG. 11 is a comparison of the present invention as applied to an embodiment and prior art.
In the figure: 1. a housing; 2. an air distributor; 3. a microchannel rectifier; 4. a burner head; 5. an ignition needle; 6. an air inlet; 7. a pressure equalizing cavity; 8. a secondary gas pressure equalizing and mixing cavity; 9. a flame; 10. a gas valve; 11. a main frame body; 12. a through hole; 13. stably burning the isolation belt; 14. a smoke outlet; 15. a gas mixing structure; 16. a combustion chamber; 17. a heat exchanger; 18. a smoke pipe; 19. a flow guide mechanism; 101. an inner ring combustor casing; 102. an inner ring burner gas tube; 103. the inner ring combustor gas distribution structure; 104. inner ring (burner) burner head; 201. an outer ring burner housing; 202. an outer ring burner gas pipe; 203. the outer ring combustor gas distribution structure; 204. outer ring (burner) burner head; 111. a controller; 112. a fan; 118. a flame detector; 901. a primary heat exchanger; 902. a secondary heat exchanger; 903. circulating water pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present embodiment discloses a burner, which includes a housing, a blower, a combustion head, and an ignition mechanism, wherein the housing 1 includes an air inlet 6, the air inlet and an input end of the combustion head form a pressure equalizing chamber 7, the blower can blow a mixture of gas and air through the combustion head to complete uniform mixing of the mixture, the output end of the combustion head 4 is provided with the ignition mechanism, which is used for igniting the mixture of gas and air, and in the present embodiment, the ignition mechanism can select an ignition needle 5. The combustion head comprises a main frame body and at least one stable combustion isolation belt 13, the stable combustion isolation belt divides the inside of the main frame body 11 into at least two ventilation areas along the direction of a gas channel, a plurality of separation mechanisms are arranged in each ventilation area, the separation mechanisms divide the ventilation areas into a plurality of through holes 12 which are distributed along the direction of the gas channel, the through holes are used for passing through mixed gas and strengthening the mixing effect of the mixed gas and the ventilation areas, the stable combustion isolation belt can divide combustion flame of the combustion surface of the main frame body into mutually independent flames, and the gas passing through the micro-channel rectifying burner is ignited to form hollow conical flames 9.
The gas and the air are uniformly distributed at one time through the air distributor 2 arranged in the gas distributor, and the outlet of the mixed gas of the gas and the air is the outlet of the micro-channel rectifying burner. And a micro-channel rectifier 3 is also arranged in the pressure equalizing cavity, so that a second gas pressure equalizing mixing cavity 8 is formed between the micro-channel rectifier and the pressure equalizing mixing cavity, and the rectification effect is better.
In some embodiments, the air outlet of the blower is connected to the air inlet of the housing, and the gas outlet of the gas pipeline is connected to the front or the rear of the air inlet of the blower.
In other optional embodiments, the gas-fired boiler further comprises a smoke tube, the air inlet of the fan is connected to the smoke outlet of the housing, the smoke tube is connected to the air outlet of the fan, and the gas outlet of the gas pipeline is connected to the back of the air inlet of the housing. The blower 112 is used to provide combustion air,
the stable combustion isolation belt is attached to the surface of the main frame body, or penetrates through the thickness direction of the main frame body, or extends into the main frame body for a preset length; the stable combustion isolation belt is fixed on the main frame body, and the ventilation area is embedded in the main frame body; or the ventilation area is fixed on the main frame body, and the stable combustion isolation belt is attached to the main frame body; or the ventilation area is fixed on the stable combustion isolation belt, and the ventilation area and the stable combustion isolation belt are integrally fixed on the main frame body, or the whole structure is integrally formed.
In the process that the air feeder/exhaust fan inputs fuel gas into a gas channel in the main frame body, air inlet exists in a plurality of directions, if the area of a ventilation area is too large, flame connection phenomenon is easy to occur, so that a single ventilation area with a small enough area needs to be ensuredHole(s)Is 0.1mm2≤SHole(s)≤9mm2Depending on the manufacturing process or other factors that may affect the process, there may be a certain defective rate, different sizes of holes, or a certain number of holes outside the specification of the present invention,are considered to be within the scope of the present invention. The thickness/height h of the ventilation area satisfies that h is not less than 4mm and not more than 1000mm, the height of different through holes can be the same or different, the upper and lower face can be planar or non-planar, but need can guarantee that gas and air mixture enter into behind the micropore, receive the restriction of pore volume, gas mixture can constantly collide the mixture in the pore wall of micropore, make gas passage's output, gas output direction is the straight line, the micropore has played the effect of mixing and rectification in this process, the combustion efficiency of flame has further been strengthened.
The width D of the stable combustion isolation belt is larger than or equal to 2mm and smaller than or equal to 50 mm.
The ventilation area is embodied as a continuous combustion hole with a cross-sectional area Sn of 30mm2≤S(n)≤22500mm2。
The thickness of the hole wall, i.e. the thickness of the separating means, is not less than 0.03mmHole(s)Not more than 3mm, and the wall thickness of the main frame body is not less than 0.03mm and not more than dOuter cover≤50mm。
Fig. 2 shows the shape of the combustion part of example 1, the main frame body is rectangular, the internal combustion stabilizing isolation strip is in a long strip shape, the rectangular interior is divided into a plurality of uniform areas, the flames of adjacent hole pieces are changed into pyramid shapes (the flames are in hollow conical shapes), as shown in fig. 6, in other alternative embodiments, the areas divided in the rectangular interior can be unequal in area, and the combustion stabilizing isolation strip can also be discontinuous, but the width D of the combustion stabilizing isolation strip needs to be ensured1The total length of 3-10 through holes and the width D of a discontinuous section2The total length of 1-2 through holes. The spacer may be linear as shown or may be of other regular or irregular shape, but it is desirable to have a spacer.
Fig. 3 shows the shape of the combustion part of example 2, in which the main frame is circular, the combustion stabilizing isolation zone at the center is circular, and the outer circle is connected to the main frame through a plurality of combustion stabilizing isolation zones to divide the area into predetermined shapes.
FIG. 4 shows the shape of the combustion part of example 3, in which the main frame is circular and the inside is divided by a plurality of stable combustion isolation zones.
FIG. 5 shows the shape of the combustion part of example 4, in which the main frame is circular, the ventilation area is annular, and the inside is divided by a plurality of stable combustion isolation zones.
The arrangement form of the stable combustion isolation belt comprises a plurality of arrangements, such as the stable combustion isolation belt is attached to the surface of the main frame body, or penetrates through the thickness direction of the main frame body, or extends into the main frame body for a preset length, the main purpose is to separate the main frame body, in the process that the traditional air feeder/exhaust fan inputs fuel gas into a gas channel in the main frame body, the spiral action of the fan enables the flow rate of the output wind to be high in a local area, the flow rate of the output wind to be low in the local area, and the flame to be fluctuated and unstable, so that incomplete combustion is caused.
The material of the combustion part of the invention comprises non-metallic material and metallic material, for example, the non-metallic material can be selected from honeycomb ceramics, meanwhile, the application principle of the existing honeycomb ceramic porous burner is in-hole combustion, which is different from the principle of the invention (the honeycomb ceramic porous structure is that the combustion is firstly carried out in a flame mode, the ceramic plate is heated by the flame, the combustion returns to the pore channel and is completed in the pore channel, the burner is in a red hot state and generates a large amount of infrared radiation, also called as an infrared burner, the burner is easy to crack by rapid cooling and rapid heating, the combustion power is limited, and the burner can not be used as a high-power heater.)
Fig. 7 is a gas range that can be implemented in the present embodiment, including the burner, wherein the housing includes an inner ring burner housing and an outer ring burner housing, the burner comprises an outer ring burner and an inner ring burner, the outer ring burner 204 is arranged in the outer ring burner shell 201, the inner ring burner 104 is arranged in the inner ring burner shell 101, a preset distance exists between the inner ring burner and the outer ring burner, the gas channel comprises a main pipeline and an inner ring burner gas pipe 102 and an outer ring burner gas pipe 202 which are connected with the main pipeline, the fuel output by the inner-ring combustor gas pipe enters the input end of the inner-ring combustor combustion head through the inner-ring combustor gas distribution structure 103, the fuel output by the outer ring combustor gas pipe enters the input end of the outer ring combustor combustion head through the outer ring combustor gas distribution structure 203, and the gas regulating valve 10 can simultaneously regulate the gas inflow of the gas and the air.
Fig. 8 is a low-nitrogen burner for a gas boiler, which can be implemented in this embodiment, and includes a controller 111, a blower, a gas valve, a gas distribution mechanism, a gas mixing chamber housing, a combustion head, an ignition needle, and a flame detector, where the blower 112 is used to provide air required for combustion, the gas valve 10 is used to control the on-off and flow rate of gas, the gas distribution mechanism may be a micro-channel rectifier and is used to uniformly distribute gas in the cross section of an air channel, the gas mixing chamber is used to mix gas and air, the ignition needle is disposed at the output end of the combustion head and is used to ignite premixed gas of air and gas, the flame detector 118 is disposed at the output end of the combustion head and is used to detect a flame signal, and the controller 1 is used to control the blower, the gas valve, the ignition needle, and the flame detector.
In the embodiment, one end of the gas distribution mechanism is connected with the gas valve 10, the other end of the gas distribution mechanism is arranged in the gas mixing cavity shell 1 connected with the air outlet of the fan, the gas distribution mechanism is in a disc shape, in other optional implementation modes, the gas distribution mechanism can also be in other implementable shapes such as a comb shape, and the mixing of air and gas is completed in the gas mixing cavity shell or in the fan.
Fig. 9 is a gas water heater capable of being implemented in this embodiment, which includes the burner, and the housing 1 is provided with an air inlet 6 and a smoke outlet 14, in this embodiment, the bottom of the housing has a certain inclination angle, the inclined plane is provided with a diversion mechanism 19, the air inlet is provided below the diversion mechanism, the air inlet is provided with an air mixing structure 15, the smoke tube 18 is connected to the output end of the burner, a combustion chamber 16 is formed therebetween, the combustion chamber is provided with a heat exchanger 17, which absorbs heat of high-temperature smoke in the combustion chamber and transfers the heat to water in the coil, and the smoke tube is connected to the smoke outlet of the housing.
Fig. 10 shows a gas-fired water heater according to an embodiment similar to the gas-fired water heater disclosed in embodiment 7, the embodiment includes the burner, the smoke tube is connected to the output end of the burner head, a combustion chamber is formed therebetween, a primary heat exchanger 901 is disposed in the combustion chamber, and absorbs heat of high-temperature smoke in the combustion chamber and transfers the heat to water in the coil, water in the primary heat exchanger is driven by a circulating water pump 903 to perform an internal circulation, the secondary heat exchanger 902 is used for transferring heat of primary hot water from the primary heat exchanger to secondary heat exchange water, in the embodiment, the secondary heat exchanger is provided with a tap water inlet, and water outlets, such as a hot water outlet, a heating water outlet, and a heating water return port, and the smoke tube is connected to the smoke outlet of the housing.
It can also be seen from the comparison chart of fig. 11 that the flame burned in the invention is blue, the adjacent flames are all stably burned, fig. 11 also shows the pollutant discharge amount measured by experiments, and the discharge standard of the gas boiler in China at present is that the discharge amount of nitrogen oxides is less than or equal to 200mg/m3The standard of some regions is higher, such as less than or equal to 80mg/m3、≤30mg/m3The emission of nitrogen oxides is less than or equal to 15mg/m3The invention has low integral manufacturing cost and less pollutant emission, can be applied to various fields related to gas in actual production and life, such as gas stoves, gas water heaters, gas boilers, wall-mounted gas stoves and the like, and has good effect of reducing the pollutant emission.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A burner is characterized by comprising a shell, a fan, a burner head and an ignition mechanism, the shell comprises an air inlet, the air inlet and the input end of the combustion head form a pressure equalizing cavity, the fan can blow the mixed gas of the fuel gas and the air through the combustion head to complete the uniform mixing of the mixed gas, the output end of the combustion head is provided with the ignition mechanism, which is used for igniting the mixture of gas and air, the combustion head comprises a main frame body and at least one stable combustion isolation belt, the stable combustion isolation belt divides the interior of the main frame body into at least two ventilation areas along the direction of the gas channel, a plurality of separation mechanisms are arranged in each ventilation area, the separation mechanism divides the ventilation area into a plurality of through holes which are distributed along the direction of the gas channel and are used for passing the mixed gas and strengthening the mixing effect of the mixed gas and the gas channel, the stable combustion isolation belt can separate combustion flame on the combustion surface of the main frame body into mutually independent flames.
2. The burner according to claim 1, wherein a micro-channel rectifier is further arranged in the pressure equalizing cavity, and a secondary gas pressure equalizing mixing cavity is formed between the micro-channel rectifier and the burner head.
3. The burner of claim 1, wherein the air outlet of the blower is connected to the air inlet of the housing, and the gas outlet of the gas pipeline is connected to the front of the air inlet or the rear of the air outlet of the blower.
4. The burner of claim 1, further comprising a smoke tube, wherein the air inlet of the fan is connected to the smoke outlet of the housing, the smoke tube is connected to the air outlet of the fan, and the gas outlet of the gas pipeline is connected to the back of the air inlet of the housing.
5. The burner according to any one of claims 1 to 4, wherein the combustion stabilizing isolation strip is attached to the surface of the main frame body, or penetrates through the thickness direction of the main frame body, or extends into the main frame body for a preset length; the stable combustion isolation belt is fixed on the main frame body, and the ventilation area is embedded in the main frame body; or the ventilation area is fixed on the main frame body, and the stable combustion isolation belt is attached to the main frame body; or the ventilation area is fixed on the stable combustion isolation belt, and the ventilation area and the stable combustion isolation belt are integrally fixed on the main frame body, or the whole structure is integrally formed.
6. Burner according to claim 5, wherein the cross-sectional area sfore of a single through hole is 0.1mm2≤SHole(s)≤9mm2(ii) a The ventilation area is embodied as a continuous combustion hole with a cross-sectional area Sn of 30mm2≤Sn≤22500mm2(ii) a The thickness of the hole wall, i.e. the thickness of the separating means, is not less than 0.03mmHole(s)Not more than 3mm, and the wall thickness of the main frame body is not less than 0.03mm and not more than dOuter coverLess than or equal to 50 mm; the thickness/height h of the ventilation area satisfies that h is more than or equal to 4mm and less than or equal to 1000 mm; width D of the stable combustion isolation belt1The total length of 3-10 through holes, the stable combustion isolation belt is continuous or discontinuous, and the width D of the discontinuous section is2The total length of 1-2 through holes; the width D of the stable combustion isolation belt is larger than or equal to 2mm and smaller than or equal to 50 mm.
7. A gas stove comprises the combustor of any one of claims 1 to 3, wherein the shell comprises an inner ring combustor shell and an outer ring combustor shell, the burner comprises an outer ring burner and an inner ring burner, the outer ring burner is arranged in the outer ring combustor shell, the inner ring burner is arranged in the inner ring combustor shell, a preset distance exists between the inner ring burner and the outer ring burner, the gas channel comprises a main pipeline and an inner ring combustor gas pipe and an outer ring combustor gas pipe which are connected with the main pipeline, the fuel output by the inner ring combustor gas pipe enters the input end of the inner ring combustor burner through the inner ring combustor gas distribution structure, and the fuel output by the outer ring combustor gas pipe enters the input end of the outer ring combustor burner through the outer ring combustor gas distribution structure.
8. A low-nitrogen burner for a gas boiler, comprising the burner of claim 6.
9. A gas water heater comprising the burner of claim 6, a flue tube connected to the output end of the burner head to define a combustion chamber therebetween, a heat exchanger disposed within the combustion chamber to absorb heat from high temperature flue gas in the combustion chamber and transfer the heat to water in the coil, the flue tube being connected to the outlet of the housing.
10. A gas-fired water heater comprising the burner as claimed in claim 6, wherein a smoke tube is connected to the output end of the burner head to form a combustion chamber, a main heat exchanger is arranged in the combustion chamber to absorb heat of high-temperature flue gas in the combustion chamber and transfer the heat to water in a coil tube, a secondary heat exchanger is used for transferring heat of primary hot water from the main heat exchanger to secondary heat exchange water, and the smoke tube is connected to a smoke outlet of the housing.
CN202011212593.XA 2020-11-03 2020-11-03 Burner and use thereof Pending CN112212328A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202011212593.XA CN112212328A (en) 2020-11-03 2020-11-03 Burner and use thereof
US18/002,162 US20230349549A1 (en) 2020-11-03 2021-11-29 Burner and applications thereof
PCT/CN2021/133947 WO2022096021A1 (en) 2020-11-03 2021-11-29 Burner and applications thereof
GB2300587.9A GB2612478A (en) 2020-11-03 2021-11-29 Burner and applications thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011212593.XA CN112212328A (en) 2020-11-03 2020-11-03 Burner and use thereof

Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113294779A (en) * 2021-05-28 2021-08-24 华中科技大学 High-temperature air combustion device for ammonia gas
WO2022096022A1 (en) * 2020-11-03 2022-05-12 中国科学院大连化学物理研究所 Combustion part and combustor
WO2022096021A1 (en) * 2020-11-03 2022-05-12 中国科学院大连化学物理研究所 Burner and applications thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022096022A1 (en) * 2020-11-03 2022-05-12 中国科学院大连化学物理研究所 Combustion part and combustor
WO2022096021A1 (en) * 2020-11-03 2022-05-12 中国科学院大连化学物理研究所 Burner and applications thereof
GB2612478A (en) * 2020-11-03 2023-05-03 Dalian Inst Chem & Physics Cas Burner and applications thereof
GB2612477A (en) * 2020-11-03 2023-05-03 Dalian Inst Chem & Physics Cas Combustion part and combustor
CN113294779A (en) * 2021-05-28 2021-08-24 华中科技大学 High-temperature air combustion device for ammonia gas

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