CN105452768A - Burner and boiler equipped with burner - Google Patents

Burner and boiler equipped with burner Download PDF

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Publication number
CN105452768A
CN105452768A CN201480044671.6A CN201480044671A CN105452768A CN 105452768 A CN105452768 A CN 105452768A CN 201480044671 A CN201480044671 A CN 201480044671A CN 105452768 A CN105452768 A CN 105452768A
Authority
CN
China
Prior art keywords
burner
combustion section
main combustion
air
air ratio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201480044671.6A
Other languages
Chinese (zh)
Inventor
冈部明吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miura Co Ltd
Original Assignee
Miura Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Miura Co Ltd filed Critical Miura Co Ltd
Publication of CN105452768A publication Critical patent/CN105452768A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D23/00—Assemblies of two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
    • F22B21/04—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
    • F22B21/341—Vertical radiation boilers with combustion in the lower part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
    • F22B21/36—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers involving an upper drum or headers mounted at the top of the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/406—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes the tubes forming a membrane wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00—Staged combustion
    • F23C2201/20—Burner staging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2203/00—Flame cooling methods otherwise than by staging or recirculation
    • F23C2203/10—Flame cooling methods otherwise than by staging or recirculation using heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/06043—Burner staging, i.e. radially stratified flame core burners
    • 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
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

Abstract

A burner (10) equipped with a main combustion unit (20), which burns a premixed gas in which a fuel gas and air have been mixed with a first air-fuel ratio, and multiple flame stabilization units (30), which are arranged so as to sandwich therebetween the main combustion unit (20), and which burn a premixed gas at a second air-fuel ratio that is lower than the first air-fuel ratio, and enables stable flame formation.

Description

Burner and possess the boiler of this burner
Technical field
The present invention relates to burner and possess the boiler of this burner.The application at the Japanese Patent Application 2013-162311 CLAIM OF PRIORITY of Japanese publication, here cites its content based on August 5th, 2013.
Background technology
In the past, to propose fuel gas and combustion air with the ratio premixed specified, and the premixed gas after this premixed was sprayed and makes it the premix burner (for example, referring to patent document 1) that burns.According to such premix burner, due at the mixture combustion by making them under fuel gas mixes with combustion air in advance state, therefore improve the efficiency of combustion of fuel gas.
In addition, in recent years, in the boiler etc. being configured to possess such burner, be strongly required to reduce fuel gas and the NO that contains in the waste gas that produces xetc. harmful substance.
At first technical literature
Patent document 1: Japanese Unexamined Patent Publication 2006-220373 publication
Here, by reducing the ignition temperature of the fuel gas in burner as far as possible, the NO contained in waste gas can be reduced xconcentration.Further, in order to reduce the ignition temperature of the fuel gas in burner, the method for the ratio (air ratio) improving the combustion air contained in premixed gas is employed.But, when making the air ratio of premixed gas too high, stably cannot maintain flame in the burner, fuel gas burn steadily cannot be made.
Summary of the invention
The problem that invention will solve
Therefore, the object of the present invention is to provide the NO that can reduce and contain in waste gas xconcentration and can burn steadily burner and possess the boiler of this burner.
For solving the means of problem
The present invention relates to a kind of burner, possess: main combustion section, its premixed mixture combustion that fuel gas and air are mixed with the first air ratio; And multiple guarantor's flame portion, it is to configure the mode of described main combustion section clamping, makes lower than described first air ratio and stably can form the premixed mixture combustion of the second air ratio of flame.
In addition, preferably, burner also possesses: the first supply line, and it supplies the premixed gas of described second air ratio to described guarantor's flame portion and described main combustion section; And second supply line, it is to described main combustion section air supply.
In addition, preferably, described main combustion section is made up of the main combustion section of multiple segmentation, and described guarantor's flame portion configures in the mode main for described segmentation combustion section clamped respectively.
In addition, preferably, the main combustion section of multiple described segmentations is to spray premixed gas in the horizontal direction and the mode separating the interval of regulation in the horizontal configures, and described guarantor's flame portion is configured in the both sides of the main combustion section of described segmentation respectively.
In addition, the present invention relates to a kind of boiler, possess: cylindrical shell; Multiple water pipe, it is configured in the inside of described cylindrical shell and extends along the vertical direction; Lower header tank, it is configured at the bottom of multiple described water pipe; Upper header tank, it is configured at the top of multiple described water pipe; Steam line, its leading section is connected with described cylindrical shell, and described steam line is to this cylindrical shell supply combustion air and fuel gas; Burner, it is configured at the connecting portion of described cylindrical shell and described steam line, and wherein, described burner is above-mentioned arbitrary burner.
Invention effect
According to the present invention, the NO that can reduce and contain in waste gas can be provided xconcentration and can burn steadily burner and possess the boiler of this burner.
Accompanying drawing explanation
Fig. 1 is the figure in the vertical section that the boiler possessing burner of the present invention is shown.
Fig. 2 is the A-A line sectional view of Fig. 1.
Fig. 3 is the integrally-built figure that burner is shown.
Fig. 4 is the figure of the structure of the burner schematically showing one embodiment of the present invention, and is the figure of the horizontal direction section that burner is shown.
Fig. 5 is the waste gas O illustrated in embodiment and comparative example 2concentration, NO xthe figure of the relation of concentration and CO concentration.
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings of a preferred embodiment of burner of the present invention and boiler.
The burner of present embodiment be by fuel gas and combustion air with the ratio premixed specified, the premixed gas after this premixed is sprayed and makes it the premix burner that burns.This burner is used in small-sized DC boiler (hereinafter referred to as " boiler ").
The boiler 1 of present embodiment possesses cylindrical shell 11, multiple water pipe 12 as shown in Figure 1 and Figure 2 like that, links wall 13, lower header tank 14, upper header tank 15, steam line 16, aiutage 17, burner 10.
When cylindrical shell 11 is configured to top view, rectangular shape is rectangular-shaped.
Multiple water pipe 12 configures in the mode extended along the vertical direction in the inside of cylindrical shell 11, and configures in the mode separating predetermined distance on the long side direction and width of cylindrical shell 11.
In the present embodiment, multiple water pipe 12 to be classified in the outside of width on the long side direction of cylindrical shell 11 along the middle water pipe group 12c between water pipe group 12a and central water pipe group 12b outside extending the outside water pipe group 12a of sidepiece configuration, central water pipe group 12b configure along long side direction at the central portion of the width of cylindrical shell 11, being configured in.
Link wall 13 by connected to each other for the water pipe 12 being adjacent in the water pipe group 12a of outside configure.
Lower header tank 14 is made up of the rectangular-shaped container of shape rectangular during top view, is configured in the bottom of cylindrical shell 11.Lower header tank 14 is connected with the bottom of multiple water pipe 12.Be used for the water of steam generation from the supply of watering (not shown) lower portion header box 14, supply water to multiple water pipe 12 from this lower header tank 14.
Upper header tank 15 is made up of the rectangular-shaped container of shape rectangular during top view, is configured in the top of cylindrical shell 11.Upper header tank 15 is connected with the upper end of multiple water pipe 12.The steam generated in multiple water pipe 12 comes together in upper header tank 15.Come together in the steam supply of upper header tank 15 to the load equipment (not shown) using steam.
Steam line 16 is connected to the bottom being positioned at the first side 11a of the end side of long side direction of cylindrical shell 11.The leading section of the fuel supply line 161 of supply fuel gas and the pressure fan 18 of supply combustion air is connected with at the upstream side of steam line 16.In steam line 16, circulation has the premixed gas that the fuel gas supplied from fuel supply line 161 mixes with the combustion air supplied from pressure fan 18, is supplied the inside of this premixed gas towards cylindrical shell 11.
Burner 10 is configured in the steam line 16 at the first 11a place, side and the coupling part of cylindrical shell 11.The premixed gas of combustion air and fuel mix sprays from steam line 16 to the inside of cylindrical shell 11 by burner 10, makes this premixed mixture combustion.The details of burner 10 is aftermentioned.
Aiutage 17 is connected to the second side 11b of another side (side contrary with the side being provided with steam line 16) being positioned at long side direction of cylindrical shell 11.The burning gases that pre-mixed gas produces in the internal-combustion of cylindrical shell 11 are discharged as waste gas by aiutage 17.
Next, be described with reference to the details of Fig. 3 and Fig. 4 to the burner 10 of present embodiment.
The burner 10 of present embodiment possesses main combustion section 20, multiple guarantor's flame portion 30, first supply line L1, the second supply line L2 as shown in Figure 3 and 4 like that.
Main combustion section 20 makes the premixed mixture combustion of the first air ratio.Here, the first air ratio is set as the air ratio close with the air ratio becoming theoretic burning limit inferior.That is, the first air ratio is set as so-called superelevation air ratio.Specifically, from the NO effectively reduced waste gas xthe viewpoint of concentration is set out, according to waste gas O 2concentration conversion, the first air ratio is preferably 7% ~ 11%, is more preferably 8% ~ 10%.
It should be noted that, the air ratio value of Actual combustion air capacity/theoretical combustion air represents, this value is with the relation of regulation and waste gas O 2concentration (%) is corresponding.Therefore, in this manual, waste gas O is used 2concentration (%) represents air ratio.In addition, NO xvalue represents waste gas O 2the value that concentration 3% converts, CO value is not scaled value, but read value.
In the present embodiment, main combustion section 20 is made up of the main combustion section 21 of multiple segmentation.More specifically, the main combustion section 21 of multiple segmentation configures in the mode separating predetermined distance in transverse direction (horizontal direction).Further, each is split main combustion section 21 and sprays premixed gas in the horizontal direction towards the inside of cylindrical shell 11.In the present embodiment, split main combustion section 21 and be configured to two row.
Multiple guarantor's flame portions 30 make the premixed mixture combustion of the second air ratio.Here, the second air ratio is set as lower than the first air ratio and stably can forms the air ratio of flame.Specifically, from the view point of the flame stably maintained in burner 10, according to waste gas O 2concentration conversion, the second air ratio is preferably 6% ~ 10%, is more preferably 7% ~ 9%.
Multiple guarantor's flame portion 30 is to configure across the mode of main combustion section 20.Further, multiple guarantor's flame portion 30 sprays premixed gas in the horizontal direction towards the inside of cylindrical shell 11.In the present embodiment, the both sides that flame portion 30 is configured in two main combustion section 21 of segmentation are respectively protected.
First supply line L1 supplies the premixed gas of the second air ratio to guarantor flame portion 30 and main combustion section 20.In the present embodiment, be set as that the premixed gas of circulation in steam line 16 reaches the second air ratio.That is, the first supply line L1 is made up of (with reference to Fig. 1) steam line 16.
Second supply line L2 is to main combustion section 20 air supply.In the present embodiment, the second supply line L2 is made up of the pipe arrangement of the inside being inserted through steam line 16.The leading section branch of the second supply line L2, is configured in the vicinity (with reference to Fig. 4) of the main combustion section 21 of multiple segmentation respectively.
For the amount of fuel gas being supplied to main combustion section 20, from reducing the NO contained waste gas xconcentration and the viewpoint stably maintaining flame set out, be preferably supplied to 50% ~ 95% of the amount of the fuel gas of burner 10, be more preferably 70% ~ 90%.
Next, the action of the boiler 1 of present embodiment is described.
First, the combustion air supplied from pressure fan 18 is pre-mixed steam line 16 with the fuel gas supplied from fuel supply line 161.Here, in the inside of steam line 16, fuel gas and combustion air are to reach the mode premixed of the second air ratio.Then, main combustion section 20 (the main combustion section of multiple segmentation 21) and multiple guarantor's flame portion 30 is supplied to the premixed gas of the mode premixed reaching the second air ratio.
In addition, from the second supply line L2 to multiple segmentation main combustion section 21 air supply.Thus, the air ratio of the premixed gas sprayed from the main combustion section 21 of multiple segmentation is higher than from the air ratio protecting the premixed gas that flame portion 30 sprays.Specifically, the second supply line L2 supply makes the premixed gas sprayed from the main combustion section 21 of segmentation reach the air of the amount of the first air ratio.
Then, spray the premixed gas of the first air ratio from the main combustion section 21 of multiple segmentation to the inside of cylindrical shell 11 and make it burning.In addition, spray the premixed gas of the second air ratio from multiple guarantor's flame portion 30 to the inside of cylindrical shell 11 and make it burning.Here, in the present embodiment, multiple guarantor's flame portion 30 is configured in each mode splitting main combustion section 21 across the main combustion section of multiple segmentation 21.Thus, by utilizing for can guarantor's flame portion 30 of the more premixed mixture combustion of the low air ratio (the second air ratio) of burn steadily the main combustion section 21 of segmentation of the premixed mixture combustion for high air ratio (the first air ratio) be clamped, thus, even if make the main combustion section of segmentation 21 with the burning of higher air ratio, also flame can be maintained.
In addition, utilize the main combustion section of multiple segmentation 21 to form main combustion section 20, multiple guarantor's flame portion 30 is configured in the respective both sides of the above-mentioned main combustion section of multiple segmentations 21.Thereby, it is possible to reduce the size (width) of the flame of main combustion section 20 (splitting main combustion section 21) one by one, not easily can there is imperfect combustion in main combustion section 20, the concentration of the CO contained in waste gas can be reduced.
Next, the burning of the premixed gas because spraying from burner 10 is utilized and the burning gases produced heat multiple water pipe 12, by being supplied to the water supply generating steam of the inside of above-mentioned multiple water pipes 12.The steam generated in the inside of multiple water pipe 12 comes together in the rear of upper header tank 15 and supplies to load equipment.
On the other hand, the burning gases being used for generating steam in the inside of cylindrical shell 11 are discharged from aiutage 17 as waste gas.Here, in the present embodiment, in burner 10, owing to making premixed mixture combustion with higher air ratio, therefore, it is possible to suppress the ignition temperature of premixed gas too high.Thereby, it is possible to the NO contained in minimizing waste gas xconcentration.
According to the burner 10 of present embodiment described above and the boiler 1 possessing this burner 10, play following such effect.
(1) burner 10 is configured to comprise: the main combustion section 20 making the premixed mixture combustion of the first air ratio; And to configure across the mode of this main combustion section 20 and to make multiple guarantor's flame portions 30 of the premixed mixture combustion of second air ratio lower than the first air ratio.Thus, burn under the state utilizing guarantor's flame portion 30 that stably can form flame main combustion section 20 to be clamped, therefore, even if with the burning of higher air ratio in main combustion section 20, also can flame be maintained.Thus, even if burn with higher air ratio, also flame can be maintained, so the NO contained in waste gas can be reduced xconcentration, and burner 10 burn steadily can be made.
(2) burner 10 is configured to comprise: the premixed gas of the second air ratio is supplied to main combustion section 20 and protects the first supply line L1 in flame portion 30; And to the air fed second supply line L2 of main combustion section 20.Thereby, it is possible to utilize simple structure to realize the burner 10 possessing main combustion section 20 and protect flame portion 30.
(3) main combustion section 20 is made up of the main combustion section 21 of multiple segmentation, protects flame portion 30 to configure across each mode splitting main combustion section 21 of the main combustion section of multiple segmentation 21.Thereby, it is possible to reduce the size (width) splitting the flame of main combustion section 21 one by one, so, can be difficult to imperfect combustion occurs in main combustion section 20, the concentration of the CO contained in waste gas can be reduced.
(4) in the burner 10 spraying premixed gas in the horizontal direction, configure the main combustion section 21 of multiple segmentation in the horizontal at spaced intervals, guarantor flame portion 30 is configured in the both sides splitting main combustion section 21 respectively.Thus, in the burner 10 forming the flame extended in the horizontal direction, the generation of the NOX that can suppress in waste gas can be realized and the burner of burn steadily.
Embodiment
Below, effect of the present invention is illustrated in greater detail by embodiment and comparative example.But scope of the present invention is not limited to above-described embodiment.
Use forms main combustion section 20 by two main combustion section 21 of segmentation and is configured with the burner 10 (with reference to Fig. 4) of the embodiment of protecting flame portion 30 on the top of above-mentioned two main combustion section 21 of segmentation and bottom respectively, and mensuration makes air ratio (the waste gas O of premixed gas 2concentration) when changing, the NO that contains in waste gas xthe change of concentration and CO concentration.
It should be noted that, in the present embodiment, use the boiler of capacity of 3t/h, during high burning (during 100% burning) supply 170m to burner 10 3the fuel gas (13A) of N/h, and be supplied to main combustion section 20 by 80% of fuel gas, be supplied to 20% of fuel gas and protect flame portion 30.In addition, air ratio is adjusted by making the amount of the combustion air being supplied to the first supply line L1 change.In addition, 220m is supplied from the second supply line L2 3the air of N/h.
In addition, will the burner 10 of embodiment do not used from the air fed situation of the second supply line L2 as comparative example.
Result is shown in Fig. 5.
Known as shown in Figure 5, in a comparative example, at waste gas O 2concentration reaches the moment of about 9.0%, cannot carry out the burning of burner 10, in contrast, in an embodiment, and can at waste gas O 2concentration reaches the burning (flame) maintaining burner 10 before about 9.8%.
In addition we know, at waste gas O 2concentration is in the larger scope of about 7.6% ~ about 9.8%, by the NO contained in waste gas xcontrol of the concentration is the such low-down state of below 6ppm, and burner 10 is burnt.
In addition known, from waste gas O 2concentration rises when exceeding about 9.3%, and CO concentration raises.
According to above result, at the waste gas O of about 9% of the burning being difficult to carry out stable premixed gas in the past 2under concentration, burner 10 burn steadily can be made.
Above, describe a preferred embodiment of burner 10 of the present invention and boiler 1, but the invention is not restricted to above-mentioned embodiment, can suitably change.
Such as, in the present embodiment, form main combustion section 20 by two main combustion section 21 of segmentation, but be not limited thereto.That is, also main combustion section can be formed by three main combustion section of segmentation.In addition, single main combustion section also can be utilized to form main combustion section.
In addition, in the present embodiment, configure the main combustion section 21 of segmentation with separating predetermined distance in the horizontal, but be not limited thereto.Namely, also can configure main for segmentation combustion section with separating predetermined distance in the height direction, in addition, also can configure the main combustion section of segmentation with all separating predetermined distance in direction (short transverse and horizontal direction) in length and breadth, and protect flame portion the mode of main for above-mentioned segmentation combustion section clamping to be configured.
In addition, in the present embodiment, apply the present invention to the burner 10 spraying pre-mixed gas in the horizontal direction, but be not limited thereto.That is, the burner along vertical ejection pre-mixed gas also can be utilized to form the present invention.
In addition, in the present embodiment, burner 10 of the present invention is applied to small-sized DC boiler 1, but is not limited thereto.That is, also can by other the firing equipment such as after-heater of burner application of the present invention in water heater, Absorption Refrigerator.
The present invention can implement with other various forms when not departing from its purport or principal character.Therefore, above-mentioned embodiment or embodiment are only illustrate in all respects, should restrictively not make an explanation.Scope of the present invention is illustrated by claims, is not limited to description completely.In addition, belong to the distortion of the equivalency range of claims, change is also all included within the scope of the present invention.
Description of reference numerals
1: direct current cooker (boiler)
10: burner
11: cylindrical shell
12: water pipe
14: lower header tank
15: upper header tank
16: steam line
20: main combustion section
21: split main combustion section
30: protect flame portion
L1: the first supply line
L2: the second supply line

Claims (5)

1. a burner, possesses:
Main combustion section, its premixed mixture combustion that fuel gas and air are mixed with the first air ratio; And
Multiple guarantor's flame portion, it is to configure the mode of described main combustion section clamping, makes lower than described first air ratio and stably can form the premixed mixture combustion of the second air ratio of flame.
2. burner according to claim 1, wherein,
Described burner also possesses:
First supply line, it supplies the premixed gas of described second air ratio to described guarantor's flame portion and described main combustion section; And
Second supply line, it is to described main combustion section air supply.
3. burner according to claim 1 and 2, wherein,
Described main combustion section is made up of the main combustion section of multiple segmentation,
Described guarantor's flame portion configures in the mode main for described segmentation combustion section clamped respectively.
4. burner according to claim 3, wherein,
The main combustion section of multiple described segmentations to spray premixed gas in the horizontal direction and the mode separating the interval of regulation in the horizontal configures,
Described guarantor's flame portion is configured in the both sides of the main combustion section of described segmentation respectively.
5. a boiler, possesses:
Cylindrical shell;
Multiple water pipe, it is configured in the inside of described cylindrical shell and extends along the vertical direction;
Lower header tank, it is configured at the bottom of multiple described water pipe;
Upper header tank, it is configured at the top of multiple described water pipe;
Steam line, its leading section is connected with described cylindrical shell, and described steam line is to this cylindrical shell supply combustion air and fuel gas;
Burner, it is configured at the connecting portion of described cylindrical shell and described steam line, wherein,
Described burner is the burner according to any one of Claims 1 to 4.
CN201480044671.6A 2013-08-05 2014-07-03 Burner and boiler equipped with burner Pending CN105452768A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2013162311A JP2015031465A (en) 2013-08-05 2013-08-05 Burner and boiler including burner
JP2013-162311 2013-08-05
PCT/JP2014/067750 WO2015019760A1 (en) 2013-08-05 2014-07-03 Burner and boiler equipped with burner

Publications (1)

Publication Number Publication Date
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JPH06117609A (en) * 1992-10-06 1994-04-28 Osaka Gas Co Ltd Thick and thin fuel combustion apparatus
JP2006220373A (en) * 2005-02-10 2006-08-24 Miura Co Ltd BOILER AND METHOD FOR BURNING LOW NOx
CN201582812U (en) * 2009-12-28 2010-09-15 清华大学 Pulverized coal burner for oxygen-rich local combustion-supporting
CN102338383A (en) * 2010-07-22 2012-02-01 黄晓华 Thick/thin fire hole burner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3170776B2 (en) * 1993-12-27 2001-05-28 株式会社ノーリツ Combustion equipment
JP3603948B2 (en) * 2000-07-28 2004-12-22 株式会社ノーリツ Combustion equipment
JP5625869B2 (en) * 2010-12-16 2014-11-19 株式会社ノーリツ Concentration burner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06117609A (en) * 1992-10-06 1994-04-28 Osaka Gas Co Ltd Thick and thin fuel combustion apparatus
JP2006220373A (en) * 2005-02-10 2006-08-24 Miura Co Ltd BOILER AND METHOD FOR BURNING LOW NOx
CN201582812U (en) * 2009-12-28 2010-09-15 清华大学 Pulverized coal burner for oxygen-rich local combustion-supporting
CN102338383A (en) * 2010-07-22 2012-02-01 黄晓华 Thick/thin fire hole burner

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WO2015019760A1 (en) 2015-02-12
CA2920468A1 (en) 2015-02-12
US20160178196A1 (en) 2016-06-23
JP2015031465A (en) 2015-02-16

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